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-rw-r--r--net/802/fc.c2
-rw-r--r--net/802/fddi.c4
-rw-r--r--net/802/hippi.c6
-rw-r--r--net/802/p8022.c3
-rw-r--r--net/802/p8023.c1
-rw-r--r--net/802/psnap.c7
-rw-r--r--net/802/sysctl_net_802.c3
-rw-r--r--net/8021q/vlan.h2
-rw-r--r--net/8021q/vlan_dev.c2
-rw-r--r--net/Kconfig3
-rw-r--r--net/Makefile2
-rw-r--r--net/appletalk/aarp.c2
-rw-r--r--net/appletalk/ddp.c8
-rw-r--r--net/atm/ipcommon.c3
-rw-r--r--net/ax25/af_ax25.c2
-rw-r--r--net/ax25/ax25_ds_in.c3
-rw-r--r--net/ax25/ax25_ds_timer.c2
-rw-r--r--net/ax25/ax25_in.c17
-rw-r--r--net/ax25/ax25_std_in.c3
-rw-r--r--net/ax25/ax25_std_timer.c2
-rw-r--r--net/ax25/ax25_subr.c4
-rw-r--r--net/bluetooth/hci_core.c18
-rw-r--r--net/bluetooth/hci_event.c81
-rw-r--r--net/bluetooth/hci_sock.c26
-rw-r--r--net/bluetooth/l2cap.c2
-rw-r--r--net/bluetooth/rfcomm/core.c73
-rw-r--r--net/bluetooth/rfcomm/sock.c2
-rw-r--r--net/bluetooth/rfcomm/tty.c206
-rw-r--r--net/bluetooth/sco.c2
-rw-r--r--net/bridge/br_fdb.c2
-rw-r--r--net/bridge/netfilter/ebt_mark.c5
-rw-r--r--net/bridge/netfilter/ebt_ulog.c9
-rw-r--r--net/core/Makefile1
-rw-r--r--net/core/datagram.c6
-rw-r--r--net/core/dev.c79
-rw-r--r--net/core/ethtool.c49
-rw-r--r--net/core/flow.c2
-rw-r--r--net/core/neighbour.c15
-rw-r--r--net/core/netfilter.c648
-rw-r--r--net/core/request_sock.c28
-rw-r--r--net/core/rtnetlink.c9
-rw-r--r--net/core/skbuff.c158
-rw-r--r--net/core/sock.c133
-rw-r--r--net/core/sysctl_net_core.c9
-rw-r--r--net/core/utils.c2
-rw-r--r--net/core/wireless.c8
-rw-r--r--net/dccp/Kconfig50
-rw-r--r--net/dccp/Makefile10
-rw-r--r--net/dccp/ccid.c139
-rw-r--r--net/dccp/ccid.h180
-rw-r--r--net/dccp/ccids/Kconfig29
-rw-r--r--net/dccp/ccids/Makefile5
-rw-r--r--net/dccp/ccids/ccid3.c1221
-rw-r--r--net/dccp/ccids/ccid3.h137
-rw-r--r--net/dccp/ccids/lib/Makefile3
-rw-r--r--net/dccp/ccids/lib/loss_interval.c144
-rw-r--r--net/dccp/ccids/lib/loss_interval.h61
-rw-r--r--net/dccp/ccids/lib/packet_history.c398
-rw-r--r--net/dccp/ccids/lib/packet_history.h199
-rw-r--r--net/dccp/ccids/lib/tfrc.h22
-rw-r--r--net/dccp/ccids/lib/tfrc_equation.c644
-rw-r--r--net/dccp/dccp.h493
-rw-r--r--net/dccp/diag.c71
-rw-r--r--net/dccp/input.c600
-rw-r--r--net/dccp/ipv4.c1356
-rw-r--r--net/dccp/minisocks.c264
-rw-r--r--net/dccp/options.c855
-rw-r--r--net/dccp/output.c528
-rw-r--r--net/dccp/proto.c826
-rw-r--r--net/dccp/timer.c255
-rw-r--r--net/decnet/af_decnet.c6
-rw-r--r--net/decnet/dn_dev.c8
-rw-r--r--net/decnet/dn_nsp_in.c2
-rw-r--r--net/decnet/dn_nsp_out.c2
-rw-r--r--net/decnet/dn_route.c2
-rw-r--r--net/decnet/dn_table.c6
-rw-r--r--net/decnet/netfilter/dn_rtmsg.c11
-rw-r--r--net/econet/af_econet.c8
-rw-r--r--net/ethernet/eth.c3
-rw-r--r--net/ethernet/sysctl_net_ether.c1
-rw-r--r--net/ipv4/Kconfig17
-rw-r--r--net/ipv4/Makefile8
-rw-r--r--net/ipv4/af_inet.c179
-rw-r--r--net/ipv4/arp.c8
-rw-r--r--net/ipv4/datagram.c3
-rw-r--r--net/ipv4/devinet.c7
-rw-r--r--net/ipv4/esp4.c12
-rw-r--r--net/ipv4/fib_frontend.c6
-rw-r--r--net/ipv4/fib_hash.c4
-rw-r--r--net/ipv4/fib_lookup.h1
-rw-r--r--net/ipv4/fib_semantics.c7
-rw-r--r--net/ipv4/fib_trie.c1628
-rw-r--r--net/ipv4/icmp.c14
-rw-r--r--net/ipv4/igmp.c2
-rw-r--r--net/ipv4/inet_connection_sock.c641
-rw-r--r--net/ipv4/inet_diag.c868
-rw-r--r--net/ipv4/inet_hashtables.c165
-rw-r--r--net/ipv4/inet_timewait_sock.c384
-rw-r--r--net/ipv4/inetpeer.c5
-rw-r--r--net/ipv4/ip_forward.c6
-rw-r--r--net/ipv4/ip_fragment.c10
-rw-r--r--net/ipv4/ip_input.c141
-rw-r--r--net/ipv4/ip_options.c52
-rw-r--r--net/ipv4/ip_output.c24
-rw-r--r--net/ipv4/ip_sockglue.c8
-rw-r--r--net/ipv4/ipcomp.c4
-rw-r--r--net/ipv4/ipconfig.c8
-rw-r--r--net/ipv4/ipmr.c2
-rw-r--r--net/ipv4/ipvs/ip_vs_app.c1
-rw-r--r--net/ipv4/ipvs/ip_vs_conn.c2
-rw-r--r--net/ipv4/ipvs/ip_vs_core.c9
-rw-r--r--net/ipv4/ipvs/ip_vs_ctl.c4
-rw-r--r--net/ipv4/ipvs/ip_vs_lblc.c4
-rw-r--r--net/ipv4/ipvs/ip_vs_lblcr.c4
-rw-r--r--net/ipv4/ipvs/ip_vs_proto_tcp.c8
-rw-r--r--net/ipv4/ipvs/ip_vs_xmit.c2
-rw-r--r--net/ipv4/multipath_drr.c2
-rw-r--r--net/ipv4/netfilter.c139
-rw-r--r--net/ipv4/netfilter/Kconfig70
-rw-r--r--net/ipv4/netfilter/Makefile9
-rw-r--r--net/ipv4/netfilter/ip_conntrack_amanda.c18
-rw-r--r--net/ipv4/netfilter/ip_conntrack_core.c379
-rw-r--r--net/ipv4/netfilter/ip_conntrack_ftp.c21
-rw-r--r--net/ipv4/netfilter/ip_conntrack_irc.c7
-rw-r--r--net/ipv4/netfilter/ip_conntrack_netlink.c1579
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_icmp.c73
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_sctp.c9
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_tcp.c48
-rw-r--r--net/ipv4/netfilter/ip_conntrack_proto_udp.c14
-rw-r--r--net/ipv4/netfilter/ip_conntrack_standalone.c49
-rw-r--r--net/ipv4/netfilter/ip_nat_core.c104
-rw-r--r--net/ipv4/netfilter/ip_nat_helper.c8
-rw-r--r--net/ipv4/netfilter/ip_nat_proto_icmp.c23
-rw-r--r--net/ipv4/netfilter/ip_nat_proto_tcp.c24
-rw-r--r--net/ipv4/netfilter/ip_nat_proto_udp.c23
-rw-r--r--net/ipv4/netfilter/ip_nat_proto_unknown.c13
-rw-r--r--net/ipv4/netfilter/ip_nat_snmp_basic.c2
-rw-r--r--net/ipv4/netfilter/ip_nat_standalone.c4
-rw-r--r--net/ipv4/netfilter/ip_queue.c51
-rw-r--r--net/ipv4/netfilter/ip_tables.c5
-rw-r--r--net/ipv4/netfilter/ipt_CLASSIFY.c4
-rw-r--r--net/ipv4/netfilter/ipt_CLUSTERIP.c2
-rw-r--r--net/ipv4/netfilter/ipt_CONNMARK.c15
-rw-r--r--net/ipv4/netfilter/ipt_DSCP.c3
-rw-r--r--net/ipv4/netfilter/ipt_ECN.c6
-rw-r--r--net/ipv4/netfilter/ipt_LOG.c86
-rw-r--r--net/ipv4/netfilter/ipt_MARK.c22
-rw-r--r--net/ipv4/netfilter/ipt_MASQUERADE.c5
-rw-r--r--net/ipv4/netfilter/ipt_NETMAP.c8
-rw-r--r--net/ipv4/netfilter/ipt_NFQUEUE.c70
-rw-r--r--net/ipv4/netfilter/ipt_REJECT.c1
-rw-r--r--net/ipv4/netfilter/ipt_TCPMSS.c3
-rw-r--r--net/ipv4/netfilter/ipt_TOS.c3
-rw-r--r--net/ipv4/netfilter/ipt_TTL.c119
-rw-r--r--net/ipv4/netfilter/ipt_ULOG.c53
-rw-r--r--net/ipv4/netfilter/ipt_connbytes.c162
-rw-r--r--net/ipv4/netfilter/ipt_connmark.c7
-rw-r--r--net/ipv4/netfilter/ipt_dccp.c176
-rw-r--r--net/ipv4/netfilter/ipt_hashlimit.c2
-rw-r--r--net/ipv4/netfilter/ipt_mark.c7
-rw-r--r--net/ipv4/netfilter/ipt_owner.c132
-rw-r--r--net/ipv4/netfilter/ipt_string.c91
-rw-r--r--net/ipv4/proc.c5
-rw-r--r--net/ipv4/protocol.c1
-rw-r--r--net/ipv4/raw.c7
-rw-r--r--net/ipv4/route.c8
-rw-r--r--net/ipv4/syncookies.c4
-rw-r--r--net/ipv4/sysctl_net_ipv4.c47
-rw-r--r--net/ipv4/tcp.c402
-rw-r--r--net/ipv4/tcp_bic.c46
-rw-r--r--net/ipv4/tcp_cong.c44
-rw-r--r--net/ipv4/tcp_diag.c784
-rw-r--r--net/ipv4/tcp_highspeed.c17
-rw-r--r--net/ipv4/tcp_htcp.c53
-rw-r--r--net/ipv4/tcp_hybla.c31
-rw-r--r--net/ipv4/tcp_input.c513
-rw-r--r--net/ipv4/tcp_ipv4.c944
-rw-r--r--net/ipv4/tcp_minisocks.c605
-rw-r--r--net/ipv4/tcp_output.c143
-rw-r--r--net/ipv4/tcp_scalable.c6
-rw-r--r--net/ipv4/tcp_timer.c253
-rw-r--r--net/ipv4/tcp_vegas.c50
-rw-r--r--net/ipv4/tcp_westwood.c64
-rw-r--r--net/ipv4/udp.c37
-rw-r--r--net/ipv4/xfrm4_state.c2
-rw-r--r--net/ipv6/Makefile4
-rw-r--r--net/ipv6/addrconf.c32
-rw-r--r--net/ipv6/af_inet6.c62
-rw-r--r--net/ipv6/ah6.c13
-rw-r--r--net/ipv6/datagram.c5
-rw-r--r--net/ipv6/esp6.c3
-rw-r--r--net/ipv6/exthdrs.c8
-rw-r--r--net/ipv6/icmp.c25
-rw-r--r--net/ipv6/inet6_hashtables.c81
-rw-r--r--net/ipv6/ip6_fib.c2
-rw-r--r--net/ipv6/ip6_input.c6
-rw-r--r--net/ipv6/ip6_output.c54
-rw-r--r--net/ipv6/ipv6_sockglue.c25
-rw-r--r--net/ipv6/ipv6_syms.c3
-rw-r--r--net/ipv6/ndisc.c4
-rw-r--r--net/ipv6/netfilter.c104
-rw-r--r--net/ipv6/netfilter/Kconfig37
-rw-r--r--net/ipv6/netfilter/Makefile3
-rw-r--r--net/ipv6/netfilter/ip6_queue.c48
-rw-r--r--net/ipv6/netfilter/ip6_tables.c5
-rw-r--r--net/ipv6/netfilter/ip6t_HL.c118
-rw-r--r--net/ipv6/netfilter/ip6t_LOG.c93
-rw-r--r--net/ipv6/netfilter/ip6t_MARK.c5
-rw-r--r--net/ipv6/netfilter/ip6t_NFQUEUE.c70
-rw-r--r--net/ipv6/netfilter/ip6t_REJECT.c284
-rw-r--r--net/ipv6/netfilter/ip6t_owner.c90
-rw-r--r--net/ipv6/raw.c20
-rw-r--r--net/ipv6/reassembly.c4
-rw-r--r--net/ipv6/route.c14
-rw-r--r--net/ipv6/sit.c2
-rw-r--r--net/ipv6/sysctl_net_ipv6.c3
-rw-r--r--net/ipv6/tcp_ipv6.c437
-rw-r--r--net/ipv6/udp.c12
-rw-r--r--net/ipv6/xfrm6_tunnel.c2
-rw-r--r--net/ipx/af_ipx.c10
-rw-r--r--net/ipx/ipx_proc.c2
-rw-r--r--net/irda/af_irda.c2
-rw-r--r--net/irda/irlap_frame.c8
-rw-r--r--net/irda/irlmp.c3
-rw-r--r--net/irda/irmod.c2
-rw-r--r--net/irda/irnet/irnet.h3
-rw-r--r--net/irda/irnet/irnet_ppp.c2
-rw-r--r--net/irda/irqueue.c1
-rw-r--r--net/lapb/lapb_subr.c2
-rw-r--r--net/llc/af_llc.c4
-rw-r--r--net/llc/llc_conn.c8
-rw-r--r--net/llc/llc_core.c3
-rw-r--r--net/llc/llc_if.c2
-rw-r--r--net/llc/llc_input.c4
-rw-r--r--net/llc/llc_sap.c2
-rw-r--r--net/netfilter/Kconfig24
-rw-r--r--net/netfilter/Makefile7
-rw-r--r--net/netfilter/core.c216
-rw-r--r--net/netfilter/nf_internals.h39
-rw-r--r--net/netfilter/nf_log.c178
-rw-r--r--net/netfilter/nf_queue.c343
-rw-r--r--net/netfilter/nf_sockopt.c132
-rw-r--r--net/netfilter/nfnetlink.c376
-rw-r--r--net/netfilter/nfnetlink_log.c1055
-rw-r--r--net/netfilter/nfnetlink_queue.c1132
-rw-r--r--net/netlink/af_netlink.c312
-rw-r--r--net/netrom/af_netrom.c7
-rw-r--r--net/netrom/nr_dev.c5
-rw-r--r--net/netrom/nr_in.c3
-rw-r--r--net/netrom/nr_subr.c4
-rw-r--r--net/netrom/nr_timer.c2
-rw-r--r--net/packet/af_packet.c14
-rw-r--r--net/rose/af_rose.c2
-rw-r--r--net/rose/rose_in.c3
-rw-r--r--net/rose/rose_route.c2
-rw-r--r--net/rose/rose_subr.c4
-rw-r--r--net/rose/rose_timer.c2
-rw-r--r--net/rxrpc/transport.c2
-rw-r--r--net/sched/Kconfig1
-rw-r--r--net/sched/act_api.c15
-rw-r--r--net/sched/cls_api.c2
-rw-r--r--net/sched/gact.c2
-rw-r--r--net/sched/ipt.c2
-rw-r--r--net/sched/mirred.c2
-rw-r--r--net/sched/pedit.c2
-rw-r--r--net/sched/police.c3
-rw-r--r--net/sched/sch_api.c4
-rw-r--r--net/sched/sch_generic.c16
-rw-r--r--net/sched/simple.c2
-rw-r--r--net/sctp/input.c4
-rw-r--r--net/sctp/ipv6.c7
-rw-r--r--net/sctp/protocol.c14
-rw-r--r--net/sctp/sm_make_chunk.c9
-rw-r--r--net/sctp/socket.c4
-rw-r--r--net/sctp/ulpqueue.c63
-rw-r--r--net/socket.c19
-rw-r--r--net/sunrpc/rpc_pipe.c4
-rw-r--r--net/sunrpc/sched.c8
-rw-r--r--net/sunrpc/svcsock.c13
-rw-r--r--net/sysctl_net.c8
-rw-r--r--net/unix/af_unix.c10
-rw-r--r--net/unix/garbage.c14
-rw-r--r--net/unix/sysctl_net_unix.c2
-rw-r--r--net/wanrouter/af_wanpipe.c2
-rw-r--r--net/x25/af_x25.c2
-rw-r--r--net/x25/x25_dev.c2
-rw-r--r--net/x25/x25_in.c2
-rw-r--r--net/x25/x25_subr.c4
-rw-r--r--net/x25/x25_timer.c2
-rw-r--r--net/xfrm/xfrm_input.c2
-rw-r--r--net/xfrm/xfrm_policy.c2
-rw-r--r--net/xfrm/xfrm_user.c31
292 files changed, 21640 insertions, 6397 deletions
diff --git a/net/802/fc.c b/net/802/fc.c
index 640d34e026c2..282c4ab1abe6 100644
--- a/net/802/fc.c
+++ b/net/802/fc.c
@@ -87,7 +87,7 @@ static int fc_rebuild_header(struct sk_buff *skb)
struct fch_hdr *fch=(struct fch_hdr *)skb->data;
struct fcllc *fcllc=(struct fcllc *)(skb->data+sizeof(struct fch_hdr));
if(fcllc->ethertype != htons(ETH_P_IP)) {
- printk("fc_rebuild_header: Don't know how to resolve type %04X addresses ?\n",(unsigned int)htons(fcllc->ethertype));
+ printk("fc_rebuild_header: Don't know how to resolve type %04X addresses ?\n", ntohs(fcllc->ethertype));
return 0;
}
#ifdef CONFIG_INET
diff --git a/net/802/fddi.c b/net/802/fddi.c
index 5ce24c4bb840..ac242a4bc346 100644
--- a/net/802/fddi.c
+++ b/net/802/fddi.c
@@ -108,8 +108,8 @@ static int fddi_rebuild_header(struct sk_buff *skb)
else
#endif
{
- printk("%s: Don't know how to resolve type %02X addresses.\n",
- skb->dev->name, htons(fddi->hdr.llc_snap.ethertype));
+ printk("%s: Don't know how to resolve type %04X addresses.\n",
+ skb->dev->name, ntohs(fddi->hdr.llc_snap.ethertype));
return(0);
}
}
diff --git a/net/802/hippi.c b/net/802/hippi.c
index 051e8af56a77..6d7fed3dd99a 100644
--- a/net/802/hippi.c
+++ b/net/802/hippi.c
@@ -51,6 +51,7 @@ static int hippi_header(struct sk_buff *skb, struct net_device *dev,
unsigned len)
{
struct hippi_hdr *hip = (struct hippi_hdr *)skb_push(skb, HIPPI_HLEN);
+ struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
if (!len){
len = skb->len - HIPPI_HLEN;
@@ -84,9 +85,10 @@ static int hippi_header(struct sk_buff *skb, struct net_device *dev,
if (daddr)
{
memcpy(hip->le.dest_switch_addr, daddr + 3, 3);
- memcpy(&skb->private.ifield, daddr + 2, 4);
+ memcpy(&hcb->ifield, daddr + 2, 4);
return HIPPI_HLEN;
}
+ hcb->ifield = 0;
return -((int)HIPPI_HLEN);
}
@@ -122,7 +124,7 @@ static int hippi_rebuild_header(struct sk_buff *skb)
* Determine the packet's protocol ID.
*/
-unsigned short hippi_type_trans(struct sk_buff *skb, struct net_device *dev)
+__be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev)
{
struct hippi_hdr *hip;
diff --git a/net/802/p8022.c b/net/802/p8022.c
index 5ae63416df6d..b24817c63ca8 100644
--- a/net/802/p8022.c
+++ b/net/802/p8022.c
@@ -35,7 +35,8 @@ static int p8022_request(struct datalink_proto *dl, struct sk_buff *skb,
struct datalink_proto *register_8022_client(unsigned char type,
int (*func)(struct sk_buff *skb,
struct net_device *dev,
- struct packet_type *pt))
+ struct packet_type *pt,
+ struct net_device *orig_dev))
{
struct datalink_proto *proto;
diff --git a/net/802/p8023.c b/net/802/p8023.c
index a0b61b40225f..6368d3dce444 100644
--- a/net/802/p8023.c
+++ b/net/802/p8023.c
@@ -20,6 +20,7 @@
#include <linux/skbuff.h>
#include <net/datalink.h>
+#include <net/p8022.h>
/*
* Place an 802.3 header on a packet. The driver will do the mac
diff --git a/net/802/psnap.c b/net/802/psnap.c
index 1053821ddf93..ab80b1fab53c 100644
--- a/net/802/psnap.c
+++ b/net/802/psnap.c
@@ -47,7 +47,7 @@ static struct datalink_proto *find_snap_client(unsigned char *desc)
* A SNAP packet has arrived
*/
static int snap_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt)
+ struct packet_type *pt, struct net_device *orig_dev)
{
int rc = 1;
struct datalink_proto *proto;
@@ -61,7 +61,7 @@ static int snap_rcv(struct sk_buff *skb, struct net_device *dev,
/* Pass the frame on. */
skb->h.raw += 5;
skb_pull(skb, 5);
- rc = proto->rcvfunc(skb, dev, &snap_packet_type);
+ rc = proto->rcvfunc(skb, dev, &snap_packet_type, orig_dev);
} else {
skb->sk = NULL;
kfree_skb(skb);
@@ -118,7 +118,8 @@ module_exit(snap_exit);
struct datalink_proto *register_snap_client(unsigned char *desc,
int (*rcvfunc)(struct sk_buff *,
struct net_device *,
- struct packet_type *))
+ struct packet_type *,
+ struct net_device *))
{
struct datalink_proto *proto = NULL;
diff --git a/net/802/sysctl_net_802.c b/net/802/sysctl_net_802.c
index 36079630c49f..700129556c13 100644
--- a/net/802/sysctl_net_802.c
+++ b/net/802/sysctl_net_802.c
@@ -10,9 +10,10 @@
* 2 of the License, or (at your option) any later version.
*/
+#include <linux/config.h>
#include <linux/mm.h>
+#include <linux/if_tr.h>
#include <linux/sysctl.h>
-#include <linux/config.h>
#ifdef CONFIG_TR
extern int sysctl_tr_rif_timeout;
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 508b1fa14546..9ae3a14dd016 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -51,7 +51,7 @@ struct net_device *__find_vlan_dev(struct net_device* real_dev,
/* found in vlan_dev.c */
int vlan_dev_rebuild_header(struct sk_buff *skb);
int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type* ptype);
+ struct packet_type *ptype, struct net_device *orig_dev);
int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, void *daddr, void *saddr,
unsigned len);
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 49c487413518..145f5cde96cf 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -113,7 +113,7 @@ static inline struct sk_buff *vlan_check_reorder_header(struct sk_buff *skb)
*
*/
int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type* ptype)
+ struct packet_type* ptype, struct net_device *orig_dev)
{
unsigned char *rawp = NULL;
struct vlan_hdr *vhdr = (struct vlan_hdr *)(skb->data);
diff --git a/net/Kconfig b/net/Kconfig
index 32327d0a56ad..2bdd5623fdd5 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -147,6 +147,7 @@ source "net/bridge/netfilter/Kconfig"
endif
+source "net/dccp/Kconfig"
source "net/sctp/Kconfig"
source "net/atm/Kconfig"
source "net/bridge/Kconfig"
@@ -205,6 +206,8 @@ config NET_PKTGEN
To compile this code as a module, choose M here: the
module will be called pktgen.
+source "net/netfilter/Kconfig"
+
endmenu
endmenu
diff --git a/net/Makefile b/net/Makefile
index 83bc52d87bae..4aa2f46d2a56 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_NET) += $(tmp-y)
obj-$(CONFIG_LLC) += llc/
obj-$(CONFIG_NET) += ethernet/ 802/ sched/ netlink/
obj-$(CONFIG_INET) += ipv4/
+obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_XFRM) += xfrm/
obj-$(CONFIG_UNIX) += unix/
ifneq ($(CONFIG_IPV6),)
@@ -41,6 +42,7 @@ obj-$(CONFIG_ATM) += atm/
obj-$(CONFIG_DECNET) += decnet/
obj-$(CONFIG_ECONET) += econet/
obj-$(CONFIG_VLAN_8021Q) += 8021q/
+obj-$(CONFIG_IP_DCCP) += dccp/
obj-$(CONFIG_IP_SCTP) += sctp/
obj-$(CONFIG_IEEE80211) += ieee80211/
diff --git a/net/appletalk/aarp.c b/net/appletalk/aarp.c
index c34614ea5fce..7076097debc2 100644
--- a/net/appletalk/aarp.c
+++ b/net/appletalk/aarp.c
@@ -698,7 +698,7 @@ static void __aarp_resolved(struct aarp_entry **list, struct aarp_entry *a,
* frame. We currently only support Ethernet.
*/
static int aarp_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt)
+ struct packet_type *pt, struct net_device *orig_dev)
{
struct elapaarp *ea = aarp_hdr(skb);
int hash, ret = 0;
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 192b529f86a4..1d31b3a3f1e5 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -53,12 +53,12 @@
#include <linux/config.h>
#include <linux/module.h>
-#include <linux/tcp.h>
#include <linux/if_arp.h>
#include <linux/termios.h> /* For TIOCOUTQ/INQ */
#include <net/datalink.h>
#include <net/psnap.h>
#include <net/sock.h>
+#include <net/tcp_states.h>
#include <net/route.h>
#include <linux/atalk.h>
@@ -1390,7 +1390,7 @@ free_it:
* [ie ARPHRD_ETHERTALK]
*/
static int atalk_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt)
+ struct packet_type *pt, struct net_device *orig_dev)
{
struct ddpehdr *ddp;
struct sock *sock;
@@ -1482,7 +1482,7 @@ freeit:
* header and append a long one.
*/
static int ltalk_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt)
+ struct packet_type *pt, struct net_device *orig_dev)
{
/* Expand any short form frames */
if (skb->mac.raw[2] == 1) {
@@ -1528,7 +1528,7 @@ static int ltalk_rcv(struct sk_buff *skb, struct net_device *dev,
}
skb->h.raw = skb->data;
- return atalk_rcv(skb, dev, pt);
+ return atalk_rcv(skb, dev, pt, orig_dev);
freeit:
kfree_skb(skb);
return 0;
diff --git a/net/atm/ipcommon.c b/net/atm/ipcommon.c
index 181a3002d8ad..4b1faca5013f 100644
--- a/net/atm/ipcommon.c
+++ b/net/atm/ipcommon.c
@@ -34,7 +34,6 @@
void skb_migrate(struct sk_buff_head *from,struct sk_buff_head *to)
{
- struct sk_buff *skb;
unsigned long flags;
struct sk_buff *skb_from = (struct sk_buff *) from;
struct sk_buff *skb_to = (struct sk_buff *) to;
@@ -47,8 +46,6 @@ void skb_migrate(struct sk_buff_head *from,struct sk_buff_head *to)
prev->next = skb_to;
to->prev->next = from->next;
to->prev = from->prev;
- for (skb = from->next; skb != skb_to; skb = skb->next)
- skb->list = to;
to->qlen += from->qlen;
spin_unlock(&to->lock);
from->prev = skb_from;
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index a5c94f11547c..ea43dfb774e2 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -45,7 +45,7 @@
#include <linux/sysctl.h>
#include <linux/init.h>
#include <linux/spinlock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/ip.h>
#include <net/arp.h>
diff --git a/net/ax25/ax25_ds_in.c b/net/ax25/ax25_ds_in.c
index 8adc0022cf58..edcaa897027c 100644
--- a/net/ax25/ax25_ds_in.c
+++ b/net/ax25/ax25_ds_in.c
@@ -22,8 +22,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/ip.h> /* For ip_rcv */
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
diff --git a/net/ax25/ax25_ds_timer.c b/net/ax25/ax25_ds_timer.c
index 3a8b67316fc3..061083efc1dc 100644
--- a/net/ax25/ax25_ds_timer.c
+++ b/net/ax25/ax25_ds_timer.c
@@ -18,7 +18,7 @@
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
diff --git a/net/ax25/ax25_in.c b/net/ax25/ax25_in.c
index 3dc808fde33f..810c9c76c2e0 100644
--- a/net/ax25/ax25_in.c
+++ b/net/ax25/ax25_in.c
@@ -9,7 +9,6 @@
* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
* Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
*/
-#include <linux/config.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
@@ -26,9 +25,7 @@
#include <linux/skbuff.h>
#include <linux/netfilter.h>
#include <net/sock.h>
-#include <net/ip.h> /* For ip_rcv */
-#include <net/tcp.h>
-#include <net/arp.h> /* For arp_rcv */
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
@@ -114,7 +111,6 @@ int ax25_rx_iframe(ax25_cb *ax25, struct sk_buff *skb)
pid = *skb->data;
-#ifdef CONFIG_INET
if (pid == AX25_P_IP) {
/* working around a TCP bug to keep additional listeners
* happy. TCP re-uses the buffer and destroys the original
@@ -132,10 +128,9 @@ int ax25_rx_iframe(ax25_cb *ax25, struct sk_buff *skb)
skb->dev = ax25->ax25_dev->dev;
skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_IP);
- ip_rcv(skb, skb->dev, NULL); /* Wrong ptype */
+ netif_rx(skb);
return 1;
}
-#endif
if (pid == AX25_P_SEGMENT) {
skb_pull(skb, 1); /* Remove PID */
return ax25_rx_fragment(ax25, skb);
@@ -250,7 +245,6 @@ static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
/* Now we are pointing at the pid byte */
switch (skb->data[1]) {
-#ifdef CONFIG_INET
case AX25_P_IP:
skb_pull(skb,2); /* drop PID/CTRL */
skb->h.raw = skb->data;
@@ -258,7 +252,7 @@ static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
skb->dev = dev;
skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_IP);
- ip_rcv(skb, dev, ptype); /* Note ptype here is the wrong one, fix me later */
+ netif_rx(skb);
break;
case AX25_P_ARP:
@@ -268,9 +262,8 @@ static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
skb->dev = dev;
skb->pkt_type = PACKET_HOST;
skb->protocol = htons(ETH_P_ARP);
- arp_rcv(skb, dev, ptype); /* Note ptype here is wrong... */
+ netif_rx(skb);
break;
-#endif
case AX25_P_TEXT:
/* Now find a suitable dgram socket */
sk = ax25_get_socket(&dest, &src, SOCK_DGRAM);
@@ -454,7 +447,7 @@ static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
* Receive an AX.25 frame via a SLIP interface.
*/
int ax25_kiss_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype)
+ struct packet_type *ptype, struct net_device *orig_dev)
{
skb->sk = NULL; /* Initially we don't know who it's for */
skb->destructor = NULL; /* Who initializes this, dammit?! */
diff --git a/net/ax25/ax25_std_in.c b/net/ax25/ax25_std_in.c
index 7131873322c4..f6ed283e9de8 100644
--- a/net/ax25/ax25_std_in.c
+++ b/net/ax25/ax25_std_in.c
@@ -29,8 +29,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/ip.h> /* For ip_rcv */
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
diff --git a/net/ax25/ax25_std_timer.c b/net/ax25/ax25_std_timer.c
index 066897bc0749..a29c480a4dc1 100644
--- a/net/ax25/ax25_std_timer.c
+++ b/net/ax25/ax25_std_timer.c
@@ -24,7 +24,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
diff --git a/net/ax25/ax25_subr.c b/net/ax25/ax25_subr.c
index 99694b57f6f5..c41dbe5fadee 100644
--- a/net/ax25/ax25_subr.c
+++ b/net/ax25/ax25_subr.c
@@ -24,7 +24,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
@@ -76,7 +76,7 @@ void ax25_requeue_frames(ax25_cb *ax25)
if (skb_prev == NULL)
skb_queue_head(&ax25->write_queue, skb);
else
- skb_append(skb_prev, skb);
+ skb_append(skb_prev, skb, &ax25->write_queue);
skb_prev = skb;
}
}
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index ffa26c10bfe8..55dc42eac92c 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -191,7 +191,7 @@ static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
/* Special commands */
while ((skb = skb_dequeue(&hdev->driver_init))) {
- skb->pkt_type = HCI_COMMAND_PKT;
+ bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
skb->dev = (void *) hdev;
skb_queue_tail(&hdev->cmd_q, skb);
hci_sched_cmd(hdev);
@@ -995,11 +995,11 @@ static int hci_send_frame(struct sk_buff *skb)
return -ENODEV;
}
- BT_DBG("%s type %d len %d", hdev->name, skb->pkt_type, skb->len);
+ BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
if (atomic_read(&hdev->promisc)) {
/* Time stamp */
- do_gettimeofday(&skb->stamp);
+ __net_timestamp(skb);
hci_send_to_sock(hdev, skb);
}
@@ -1034,7 +1034,7 @@ int hci_send_cmd(struct hci_dev *hdev, __u16 ogf, __u16 ocf, __u32 plen, void *p
BT_DBG("skb len %d", skb->len);
- skb->pkt_type = HCI_COMMAND_PKT;
+ bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
skb->dev = (void *) hdev;
skb_queue_tail(&hdev->cmd_q, skb);
hci_sched_cmd(hdev);
@@ -1081,7 +1081,7 @@ int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags);
skb->dev = (void *) hdev;
- skb->pkt_type = HCI_ACLDATA_PKT;
+ bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
hci_add_acl_hdr(skb, conn->handle, flags | ACL_START);
if (!(list = skb_shinfo(skb)->frag_list)) {
@@ -1103,7 +1103,7 @@ int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags)
skb = list; list = list->next;
skb->dev = (void *) hdev;
- skb->pkt_type = HCI_ACLDATA_PKT;
+ bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT);
BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
@@ -1139,7 +1139,7 @@ int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
memcpy(skb->h.raw, &hdr, HCI_SCO_HDR_SIZE);
skb->dev = (void *) hdev;
- skb->pkt_type = HCI_SCODATA_PKT;
+ bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
skb_queue_tail(&conn->data_q, skb);
hci_sched_tx(hdev);
return 0;
@@ -1369,7 +1369,7 @@ void hci_rx_task(unsigned long arg)
if (test_bit(HCI_INIT, &hdev->flags)) {
/* Don't process data packets in this states. */
- switch (skb->pkt_type) {
+ switch (bt_cb(skb)->pkt_type) {
case HCI_ACLDATA_PKT:
case HCI_SCODATA_PKT:
kfree_skb(skb);
@@ -1378,7 +1378,7 @@ void hci_rx_task(unsigned long arg)
}
/* Process frame */
- switch (skb->pkt_type) {
+ switch (bt_cb(skb)->pkt_type) {
case HCI_EVENT_PKT:
hci_event_packet(hdev, skb);
break;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 46367bd129c3..d6da0939216d 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -484,14 +484,18 @@ static inline void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff
/* Inquiry Result */
static inline void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
+ struct inquiry_data data;
struct inquiry_info *info = (struct inquiry_info *) (skb->data + 1);
int num_rsp = *((__u8 *) skb->data);
BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+ if (!num_rsp)
+ return;
+
hci_dev_lock(hdev);
+
for (; num_rsp; num_rsp--) {
- struct inquiry_data data;
bacpy(&data.bdaddr, &info->bdaddr);
data.pscan_rep_mode = info->pscan_rep_mode;
data.pscan_period_mode = info->pscan_period_mode;
@@ -502,30 +506,55 @@ static inline void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *
info++;
hci_inquiry_cache_update(hdev, &data);
}
+
hci_dev_unlock(hdev);
}
/* Inquiry Result With RSSI */
static inline void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
- struct inquiry_info_with_rssi *info = (struct inquiry_info_with_rssi *) (skb->data + 1);
+ struct inquiry_data data;
int num_rsp = *((__u8 *) skb->data);
BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+ if (!num_rsp)
+ return;
+
hci_dev_lock(hdev);
- for (; num_rsp; num_rsp--) {
- struct inquiry_data data;
- bacpy(&data.bdaddr, &info->bdaddr);
- data.pscan_rep_mode = info->pscan_rep_mode;
- data.pscan_period_mode = info->pscan_period_mode;
- data.pscan_mode = 0x00;
- memcpy(data.dev_class, info->dev_class, 3);
- data.clock_offset = info->clock_offset;
- data.rssi = info->rssi;
- info++;
- hci_inquiry_cache_update(hdev, &data);
+
+ if ((skb->len - 1) / num_rsp != sizeof(struct inquiry_info_with_rssi)) {
+ struct inquiry_info_with_rssi_and_pscan_mode *info =
+ (struct inquiry_info_with_rssi_and_pscan_mode *) (skb->data + 1);
+
+ for (; num_rsp; num_rsp--) {
+ bacpy(&data.bdaddr, &info->bdaddr);
+ data.pscan_rep_mode = info->pscan_rep_mode;
+ data.pscan_period_mode = info->pscan_period_mode;
+ data.pscan_mode = info->pscan_mode;
+ memcpy(data.dev_class, info->dev_class, 3);
+ data.clock_offset = info->clock_offset;
+ data.rssi = info->rssi;
+ info++;
+ hci_inquiry_cache_update(hdev, &data);
+ }
+ } else {
+ struct inquiry_info_with_rssi *info =
+ (struct inquiry_info_with_rssi *) (skb->data + 1);
+
+ for (; num_rsp; num_rsp--) {
+ bacpy(&data.bdaddr, &info->bdaddr);
+ data.pscan_rep_mode = info->pscan_rep_mode;
+ data.pscan_period_mode = info->pscan_period_mode;
+ data.pscan_mode = 0x00;
+ memcpy(data.dev_class, info->dev_class, 3);
+ data.clock_offset = info->clock_offset;
+ data.rssi = info->rssi;
+ info++;
+ hci_inquiry_cache_update(hdev, &data);
+ }
}
+
hci_dev_unlock(hdev);
}
@@ -865,6 +894,24 @@ static inline void hci_clock_offset_evt(struct hci_dev *hdev, struct sk_buff *sk
hci_dev_unlock(hdev);
}
+/* Page Scan Repetition Mode */
+static inline void hci_pscan_rep_mode_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct hci_ev_pscan_rep_mode *ev = (struct hci_ev_pscan_rep_mode *) skb->data;
+ struct inquiry_entry *ie;
+
+ BT_DBG("%s", hdev->name);
+
+ hci_dev_lock(hdev);
+
+ if ((ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr))) {
+ ie->data.pscan_rep_mode = ev->pscan_rep_mode;
+ ie->timestamp = jiffies;
+ }
+
+ hci_dev_unlock(hdev);
+}
+
void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_event_hdr *hdr = (struct hci_event_hdr *) skb->data;
@@ -937,6 +984,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
hci_clock_offset_evt(hdev, skb);
break;
+ case HCI_EV_PSCAN_REP_MODE:
+ hci_pscan_rep_mode_evt(hdev, skb);
+ break;
+
case HCI_EV_CMD_STATUS:
cs = (struct hci_ev_cmd_status *) skb->data;
skb_pull(skb, sizeof(cs));
@@ -1036,9 +1087,9 @@ void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
memcpy(ev->data, data, dlen);
bt_cb(skb)->incoming = 1;
- do_gettimeofday(&skb->stamp);
+ __net_timestamp(skb);
- skb->pkt_type = HCI_EVENT_PKT;
+ bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
skb->dev = (void *) hdev;
hci_send_to_sock(hdev, skb);
kfree_skb(skb);
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index ebdcce5e7ca0..32ef7975a139 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -110,11 +110,11 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
/* Apply filter */
flt = &hci_pi(sk)->filter;
- if (!test_bit((skb->pkt_type == HCI_VENDOR_PKT) ?
- 0 : (skb->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask))
+ if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ?
+ 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask))
continue;
- if (skb->pkt_type == HCI_EVENT_PKT) {
+ if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) {
register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
if (!hci_test_bit(evt, &flt->event_mask))
@@ -131,7 +131,7 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
continue;
/* Put type byte before the data */
- memcpy(skb_push(nskb, 1), &nskb->pkt_type, 1);
+ memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
if (sock_queue_rcv_skb(sk, nskb))
kfree_skb(nskb);
@@ -327,11 +327,17 @@ static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_
{
__u32 mask = hci_pi(sk)->cmsg_mask;
- if (mask & HCI_CMSG_DIR)
- put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(int), &bt_cb(skb)->incoming);
+ if (mask & HCI_CMSG_DIR) {
+ int incoming = bt_cb(skb)->incoming;
+ put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming);
+ }
+
+ if (mask & HCI_CMSG_TSTAMP) {
+ struct timeval tv;
- if (mask & HCI_CMSG_TSTAMP)
- put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(skb->stamp), &skb->stamp);
+ skb_get_timestamp(skb, &tv);
+ put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(tv), &tv);
+ }
}
static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
@@ -405,11 +411,11 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
goto drop;
}
- skb->pkt_type = *((unsigned char *) skb->data);
+ bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
skb_pull(skb, 1);
skb->dev = (void *) hdev;
- if (skb->pkt_type == HCI_COMMAND_PKT) {
+ if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
u16 opcode = __le16_to_cpu(get_unaligned((u16 *)skb->data));
u16 ogf = hci_opcode_ogf(opcode);
u16 ocf = hci_opcode_ocf(opcode);
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 32fccfb5bfa5..d3d6bc547212 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -372,7 +372,7 @@ static struct proto l2cap_proto = {
.obj_size = sizeof(struct l2cap_pinfo)
};
-static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, int prio)
+static struct sock *l2cap_sock_alloc(struct socket *sock, int proto, unsigned int __nocast prio)
{
struct sock *sk;
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 27bf5047cd33..173f46e8cdae 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -21,10 +21,6 @@
SOFTWARE IS DISCLAIMED.
*/
-/*
- RPN support - Dirk Husemann <hud@zurich.ibm.com>
-*/
-
/*
* Bluetooth RFCOMM core.
*
@@ -115,10 +111,10 @@ static void rfcomm_session_del(struct rfcomm_session *s);
#define __get_mcc_len(b) ((b & 0xfe) >> 1)
/* RPN macros */
-#define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x3) << 3))
+#define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x7) << 3))
#define __get_rpn_data_bits(line) ((line) & 0x3)
#define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1)
-#define __get_rpn_parity(line) (((line) >> 3) & 0x3)
+#define __get_rpn_parity(line) (((line) >> 3) & 0x7)
static inline void rfcomm_schedule(uint event)
{
@@ -233,7 +229,7 @@ static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d)
d->rx_credits = RFCOMM_DEFAULT_CREDITS;
}
-struct rfcomm_dlc *rfcomm_dlc_alloc(int prio)
+struct rfcomm_dlc *rfcomm_dlc_alloc(unsigned int __nocast prio)
{
struct rfcomm_dlc *d = kmalloc(sizeof(*d), prio);
if (!d)
@@ -780,10 +776,10 @@ static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d
return rfcomm_send_frame(s, buf, ptr - buf);
}
-static int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
- u8 bit_rate, u8 data_bits, u8 stop_bits,
- u8 parity, u8 flow_ctrl_settings,
- u8 xon_char, u8 xoff_char, u16 param_mask)
+int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
+ u8 bit_rate, u8 data_bits, u8 stop_bits,
+ u8 parity, u8 flow_ctrl_settings,
+ u8 xon_char, u8 xoff_char, u16 param_mask)
{
struct rfcomm_hdr *hdr;
struct rfcomm_mcc *mcc;
@@ -791,9 +787,9 @@ static int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
u8 buf[16], *ptr = buf;
BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x"
- "flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x",
- s, cr, dlci, bit_rate, data_bits, stop_bits, parity,
- flow_ctrl_settings, xon_char, xoff_char, param_mask);
+ " flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x",
+ s, cr, dlci, bit_rate, data_bits, stop_bits, parity,
+ flow_ctrl_settings, xon_char, xoff_char, param_mask);
hdr = (void *) ptr; ptr += sizeof(*hdr);
hdr->addr = __addr(s->initiator, 0);
@@ -1265,16 +1261,16 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
u8 xon_char = 0;
u8 xoff_char = 0;
u16 rpn_mask = RFCOMM_RPN_PM_ALL;
-
- BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x",
- dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl,
- rpn->xon_char, rpn->xoff_char, rpn->param_mask);
-
- if (!cr)
+
+ BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x",
+ dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl,
+ rpn->xon_char, rpn->xoff_char, rpn->param_mask);
+
+ if (!cr)
return 0;
-
+
if (len == 1) {
- /* request: return default setting */
+ /* This is a request, return default settings */
bit_rate = RFCOMM_RPN_BR_115200;
data_bits = RFCOMM_RPN_DATA_8;
stop_bits = RFCOMM_RPN_STOP_1;
@@ -1282,11 +1278,12 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
flow_ctrl = RFCOMM_RPN_FLOW_NONE;
xon_char = RFCOMM_RPN_XON_CHAR;
xoff_char = RFCOMM_RPN_XOFF_CHAR;
-
goto rpn_out;
}
- /* check for sane values: ignore/accept bit_rate, 8 bits, 1 stop bit, no parity,
- no flow control lines, normal XON/XOFF chars */
+
+ /* Check for sane values, ignore/accept bit_rate, 8 bits, 1 stop bit,
+ * no parity, no flow control lines, normal XON/XOFF chars */
+
if (rpn->param_mask & RFCOMM_RPN_PM_BITRATE) {
bit_rate = rpn->bit_rate;
if (bit_rate != RFCOMM_RPN_BR_115200) {
@@ -1295,6 +1292,7 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
rpn_mask ^= RFCOMM_RPN_PM_BITRATE;
}
}
+
if (rpn->param_mask & RFCOMM_RPN_PM_DATA) {
data_bits = __get_rpn_data_bits(rpn->line_settings);
if (data_bits != RFCOMM_RPN_DATA_8) {
@@ -1303,6 +1301,7 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
rpn_mask ^= RFCOMM_RPN_PM_DATA;
}
}
+
if (rpn->param_mask & RFCOMM_RPN_PM_STOP) {
stop_bits = __get_rpn_stop_bits(rpn->line_settings);
if (stop_bits != RFCOMM_RPN_STOP_1) {
@@ -1311,6 +1310,7 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
rpn_mask ^= RFCOMM_RPN_PM_STOP;
}
}
+
if (rpn->param_mask & RFCOMM_RPN_PM_PARITY) {
parity = __get_rpn_parity(rpn->line_settings);
if (parity != RFCOMM_RPN_PARITY_NONE) {
@@ -1319,6 +1319,7 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
rpn_mask ^= RFCOMM_RPN_PM_PARITY;
}
}
+
if (rpn->param_mask & RFCOMM_RPN_PM_FLOW) {
flow_ctrl = rpn->flow_ctrl;
if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) {
@@ -1327,6 +1328,7 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
rpn_mask ^= RFCOMM_RPN_PM_FLOW;
}
}
+
if (rpn->param_mask & RFCOMM_RPN_PM_XON) {
xon_char = rpn->xon_char;
if (xon_char != RFCOMM_RPN_XON_CHAR) {
@@ -1335,6 +1337,7 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
rpn_mask ^= RFCOMM_RPN_PM_XON;
}
}
+
if (rpn->param_mask & RFCOMM_RPN_PM_XOFF) {
xoff_char = rpn->xoff_char;
if (xoff_char != RFCOMM_RPN_XOFF_CHAR) {
@@ -1345,9 +1348,8 @@ static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_
}
rpn_out:
- rfcomm_send_rpn(s, 0, dlci,
- bit_rate, data_bits, stop_bits, parity, flow_ctrl,
- xon_char, xoff_char, rpn_mask);
+ rfcomm_send_rpn(s, 0, dlci, bit_rate, data_bits, stop_bits,
+ parity, flow_ctrl, xon_char, xoff_char, rpn_mask);
return 0;
}
@@ -1358,14 +1360,13 @@ static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb
u8 dlci = __get_dlci(rls->dlci);
BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status);
-
+
if (!cr)
return 0;
- /* FIXME: We should probably do something with this
- information here. But for now it's sufficient just
- to reply -- Bluetooth 1.1 says it's mandatory to
- recognise and respond to RLS */
+ /* We should probably do something with this information here. But
+ * for now it's sufficient just to reply -- Bluetooth 1.1 says it's
+ * mandatory to recognise and respond to RLS */
rfcomm_send_rls(s, 0, dlci, rls->status);
@@ -1381,7 +1382,7 @@ static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb
BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig);
d = rfcomm_dlc_get(s, dlci);
- if (!d)
+ if (!d)
return 0;
if (cr) {
@@ -1389,7 +1390,7 @@ static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb
set_bit(RFCOMM_TX_THROTTLED, &d->flags);
else
clear_bit(RFCOMM_TX_THROTTLED, &d->flags);
-
+
rfcomm_dlc_lock(d);
if (d->modem_status)
d->modem_status(d, msc->v24_sig);
@@ -1398,7 +1399,7 @@ static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb
rfcomm_send_msc(s, 0, dlci, msc->v24_sig);
d->mscex |= RFCOMM_MSCEX_RX;
- } else
+ } else
d->mscex |= RFCOMM_MSCEX_TX;
return 0;
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 63a123c5c41b..90e19eb6d3cc 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -284,7 +284,7 @@ static struct proto rfcomm_proto = {
.obj_size = sizeof(struct rfcomm_pinfo)
};
-static struct sock *rfcomm_sock_alloc(struct socket *sock, int proto, int prio)
+static struct sock *rfcomm_sock_alloc(struct socket *sock, int proto, unsigned int __nocast prio)
{
struct rfcomm_dlc *d;
struct sock *sk;
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 6304590fd36a..1bca860a6109 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -286,7 +286,7 @@ static inline void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *de
skb->destructor = rfcomm_wfree;
}
-static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, int priority)
+static struct sk_buff *rfcomm_wmalloc(struct rfcomm_dev *dev, unsigned long size, unsigned int __nocast priority)
{
if (atomic_read(&dev->wmem_alloc) < rfcomm_room(dev->dlc)) {
struct sk_buff *skb = alloc_skb(size, priority);
@@ -528,9 +528,14 @@ static void rfcomm_dev_modem_status(struct rfcomm_dlc *dlc, u8 v24_sig)
struct rfcomm_dev *dev = dlc->owner;
if (!dev)
return;
-
+
BT_DBG("dlc %p dev %p v24_sig 0x%02x", dlc, dev, v24_sig);
+ if ((dev->modem_status & TIOCM_CD) && !(v24_sig & RFCOMM_V24_DV)) {
+ if (dev->tty && !C_CLOCAL(dev->tty))
+ tty_hangup(dev->tty);
+ }
+
dev->modem_status =
((v24_sig & RFCOMM_V24_RTC) ? (TIOCM_DSR | TIOCM_DTR) : 0) |
((v24_sig & RFCOMM_V24_RTR) ? (TIOCM_RTS | TIOCM_CTS) : 0) |
@@ -740,20 +745,143 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, struct file *filp, unsigned
return -ENOIOCTLCMD;
}
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
static void rfcomm_tty_set_termios(struct tty_struct *tty, struct termios *old)
{
- BT_DBG("tty %p", tty);
+ struct termios *new = (struct termios *) tty->termios;
+ int old_baud_rate = tty_termios_baud_rate(old);
+ int new_baud_rate = tty_termios_baud_rate(new);
- if ((tty->termios->c_cflag == old->c_cflag) &&
- (RELEVANT_IFLAG(tty->termios->c_iflag) == RELEVANT_IFLAG(old->c_iflag)))
- return;
+ u8 baud, data_bits, stop_bits, parity, x_on, x_off;
+ u16 changes = 0;
+
+ struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+
+ BT_DBG("tty %p termios %p", tty, old);
+
+ /* Handle turning off CRTSCTS */
+ if ((old->c_cflag & CRTSCTS) && !(new->c_cflag & CRTSCTS))
+ BT_DBG("Turning off CRTSCTS unsupported");
+
+ /* Parity on/off and when on, odd/even */
+ if (((old->c_cflag & PARENB) != (new->c_cflag & PARENB)) ||
+ ((old->c_cflag & PARODD) != (new->c_cflag & PARODD)) ) {
+ changes |= RFCOMM_RPN_PM_PARITY;
+ BT_DBG("Parity change detected.");
+ }
+
+ /* Mark and space parity are not supported! */
+ if (new->c_cflag & PARENB) {
+ if (new->c_cflag & PARODD) {
+ BT_DBG("Parity is ODD");
+ parity = RFCOMM_RPN_PARITY_ODD;
+ } else {
+ BT_DBG("Parity is EVEN");
+ parity = RFCOMM_RPN_PARITY_EVEN;
+ }
+ } else {
+ BT_DBG("Parity is OFF");
+ parity = RFCOMM_RPN_PARITY_NONE;
+ }
+
+ /* Setting the x_on / x_off characters */
+ if (old->c_cc[VSTOP] != new->c_cc[VSTOP]) {
+ BT_DBG("XOFF custom");
+ x_on = new->c_cc[VSTOP];
+ changes |= RFCOMM_RPN_PM_XON;
+ } else {
+ BT_DBG("XOFF default");
+ x_on = RFCOMM_RPN_XON_CHAR;
+ }
+
+ if (old->c_cc[VSTART] != new->c_cc[VSTART]) {
+ BT_DBG("XON custom");
+ x_off = new->c_cc[VSTART];
+ changes |= RFCOMM_RPN_PM_XOFF;
+ } else {
+ BT_DBG("XON default");
+ x_off = RFCOMM_RPN_XOFF_CHAR;
+ }
+
+ /* Handle setting of stop bits */
+ if ((old->c_cflag & CSTOPB) != (new->c_cflag & CSTOPB))
+ changes |= RFCOMM_RPN_PM_STOP;
+
+ /* POSIX does not support 1.5 stop bits and RFCOMM does not
+ * support 2 stop bits. So a request for 2 stop bits gets
+ * translated to 1.5 stop bits */
+ if (new->c_cflag & CSTOPB) {
+ stop_bits = RFCOMM_RPN_STOP_15;
+ } else {
+ stop_bits = RFCOMM_RPN_STOP_1;
+ }
+
+ /* Handle number of data bits [5-8] */
+ if ((old->c_cflag & CSIZE) != (new->c_cflag & CSIZE))
+ changes |= RFCOMM_RPN_PM_DATA;
+
+ switch (new->c_cflag & CSIZE) {
+ case CS5:
+ data_bits = RFCOMM_RPN_DATA_5;
+ break;
+ case CS6:
+ data_bits = RFCOMM_RPN_DATA_6;
+ break;
+ case CS7:
+ data_bits = RFCOMM_RPN_DATA_7;
+ break;
+ case CS8:
+ data_bits = RFCOMM_RPN_DATA_8;
+ break;
+ default:
+ data_bits = RFCOMM_RPN_DATA_8;
+ break;
+ }
+
+ /* Handle baudrate settings */
+ if (old_baud_rate != new_baud_rate)
+ changes |= RFCOMM_RPN_PM_BITRATE;
- /* handle turning off CRTSCTS */
- if ((old->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
- BT_DBG("turning off CRTSCTS");
+ switch (new_baud_rate) {
+ case 2400:
+ baud = RFCOMM_RPN_BR_2400;
+ break;
+ case 4800:
+ baud = RFCOMM_RPN_BR_4800;
+ break;
+ case 7200:
+ baud = RFCOMM_RPN_BR_7200;
+ break;
+ case 9600:
+ baud = RFCOMM_RPN_BR_9600;
+ break;
+ case 19200:
+ baud = RFCOMM_RPN_BR_19200;
+ break;
+ case 38400:
+ baud = RFCOMM_RPN_BR_38400;
+ break;
+ case 57600:
+ baud = RFCOMM_RPN_BR_57600;
+ break;
+ case 115200:
+ baud = RFCOMM_RPN_BR_115200;
+ break;
+ case 230400:
+ baud = RFCOMM_RPN_BR_230400;
+ break;
+ default:
+ /* 9600 is standard accordinag to the RFCOMM specification */
+ baud = RFCOMM_RPN_BR_9600;
+ break;
+
}
+
+ if (changes)
+ rfcomm_send_rpn(dev->dlc->session, 1, dev->dlc->dlci, baud,
+ data_bits, stop_bits, parity,
+ RFCOMM_RPN_FLOW_NONE, x_on, x_off, changes);
+
+ return;
}
static void rfcomm_tty_throttle(struct tty_struct *tty)
@@ -761,7 +889,7 @@ static void rfcomm_tty_throttle(struct tty_struct *tty)
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
BT_DBG("tty %p dev %p", tty, dev);
-
+
rfcomm_dlc_throttle(dev->dlc);
}
@@ -770,7 +898,7 @@ static void rfcomm_tty_unthrottle(struct tty_struct *tty)
struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
BT_DBG("tty %p dev %p", tty, dev);
-
+
rfcomm_dlc_unthrottle(dev->dlc);
}
@@ -841,35 +969,35 @@ static int rfcomm_tty_tiocmget(struct tty_struct *tty, struct file *filp)
static int rfcomm_tty_tiocmset(struct tty_struct *tty, struct file *filp, unsigned int set, unsigned int clear)
{
- struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
- struct rfcomm_dlc *dlc = dev->dlc;
- u8 v24_sig;
+ struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
+ struct rfcomm_dlc *dlc = dev->dlc;
+ u8 v24_sig;
BT_DBG("tty %p dev %p set 0x%02x clear 0x%02x", tty, dev, set, clear);
- rfcomm_dlc_get_modem_status(dlc, &v24_sig);
-
- if (set & TIOCM_DSR || set & TIOCM_DTR)
- v24_sig |= RFCOMM_V24_RTC;
- if (set & TIOCM_RTS || set & TIOCM_CTS)
- v24_sig |= RFCOMM_V24_RTR;
- if (set & TIOCM_RI)
- v24_sig |= RFCOMM_V24_IC;
- if (set & TIOCM_CD)
- v24_sig |= RFCOMM_V24_DV;
-
- if (clear & TIOCM_DSR || clear & TIOCM_DTR)
- v24_sig &= ~RFCOMM_V24_RTC;
- if (clear & TIOCM_RTS || clear & TIOCM_CTS)
- v24_sig &= ~RFCOMM_V24_RTR;
- if (clear & TIOCM_RI)
- v24_sig &= ~RFCOMM_V24_IC;
- if (clear & TIOCM_CD)
- v24_sig &= ~RFCOMM_V24_DV;
-
- rfcomm_dlc_set_modem_status(dlc, v24_sig);
-
- return 0;
+ rfcomm_dlc_get_modem_status(dlc, &v24_sig);
+
+ if (set & TIOCM_DSR || set & TIOCM_DTR)
+ v24_sig |= RFCOMM_V24_RTC;
+ if (set & TIOCM_RTS || set & TIOCM_CTS)
+ v24_sig |= RFCOMM_V24_RTR;
+ if (set & TIOCM_RI)
+ v24_sig |= RFCOMM_V24_IC;
+ if (set & TIOCM_CD)
+ v24_sig |= RFCOMM_V24_DV;
+
+ if (clear & TIOCM_DSR || clear & TIOCM_DTR)
+ v24_sig &= ~RFCOMM_V24_RTC;
+ if (clear & TIOCM_RTS || clear & TIOCM_CTS)
+ v24_sig &= ~RFCOMM_V24_RTR;
+ if (clear & TIOCM_RI)
+ v24_sig &= ~RFCOMM_V24_IC;
+ if (clear & TIOCM_CD)
+ v24_sig &= ~RFCOMM_V24_DV;
+
+ rfcomm_dlc_set_modem_status(dlc, v24_sig);
+
+ return 0;
}
/* ---- TTY structure ---- */
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 746c11fc017e..ce7ab7dfa0b2 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -418,7 +418,7 @@ static struct proto sco_proto = {
.obj_size = sizeof(struct sco_pinfo)
};
-static struct sock *sco_sock_alloc(struct socket *sock, int proto, int prio)
+static struct sock *sco_sock_alloc(struct socket *sock, int proto, unsigned int __nocast prio)
{
struct sock *sk;
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index e6c2200b7ca3..24396b914d11 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -23,7 +23,7 @@
#include <asm/atomic.h>
#include "br_private.h"
-static kmem_cache_t *br_fdb_cache;
+static kmem_cache_t *br_fdb_cache __read_mostly;
static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
const unsigned char *addr);
diff --git a/net/bridge/netfilter/ebt_mark.c b/net/bridge/netfilter/ebt_mark.c
index 02c632b4d325..c93d35ab95c0 100644
--- a/net/bridge/netfilter/ebt_mark.c
+++ b/net/bridge/netfilter/ebt_mark.c
@@ -23,10 +23,9 @@ static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr,
{
struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
- if ((*pskb)->nfmark != info->mark) {
+ if ((*pskb)->nfmark != info->mark)
(*pskb)->nfmark = info->mark;
- (*pskb)->nfcache |= NFC_ALTERED;
- }
+
return info->target;
}
diff --git a/net/bridge/netfilter/ebt_ulog.c b/net/bridge/netfilter/ebt_ulog.c
index 01af4fcef26d..aae26ae2e61f 100644
--- a/net/bridge/netfilter/ebt_ulog.c
+++ b/net/bridge/netfilter/ebt_ulog.c
@@ -78,8 +78,8 @@ static void ulog_send(unsigned int nlgroup)
if (ub->qlen > 1)
ub->lastnlh->nlmsg_type = NLMSG_DONE;
- NETLINK_CB(ub->skb).dst_groups = 1 << nlgroup;
- netlink_broadcast(ebtulognl, ub->skb, 0, 1 << nlgroup, GFP_ATOMIC);
+ NETLINK_CB(ub->skb).dst_group = nlgroup + 1;
+ netlink_broadcast(ebtulognl, ub->skb, 0, nlgroup + 1, GFP_ATOMIC);
ub->qlen = 0;
ub->skb = NULL;
@@ -162,7 +162,7 @@ static void ebt_ulog(const struct sk_buff *skb, unsigned int hooknr,
pm->version = EBT_ULOG_VERSION;
do_gettimeofday(&pm->stamp);
if (ub->qlen == 1)
- ub->skb->stamp = pm->stamp;
+ skb_set_timestamp(ub->skb, &pm->stamp);
pm->data_len = copy_len;
pm->mark = skb->nfmark;
pm->hook = hooknr;
@@ -258,7 +258,8 @@ static int __init init(void)
spin_lock_init(&ulog_buffers[i].lock);
}
- ebtulognl = netlink_kernel_create(NETLINK_NFLOG, NULL);
+ ebtulognl = netlink_kernel_create(NETLINK_NFLOG, EBT_ULOG_MAXNLGROUPS,
+ NULL, THIS_MODULE);
if (!ebtulognl)
ret = -ENOMEM;
else if ((ret = ebt_register_watcher(&ulog)))
diff --git a/net/core/Makefile b/net/core/Makefile
index f5f5e58943e8..630da0f0579e 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -12,7 +12,6 @@ obj-y += dev.o ethtool.o dev_mcast.o dst.o \
obj-$(CONFIG_XFRM) += flow.o
obj-$(CONFIG_SYSFS) += net-sysfs.o
-obj-$(CONFIG_NETFILTER) += netfilter.o
obj-$(CONFIG_NET_DIVERT) += dv.o
obj-$(CONFIG_NET_PKTGEN) += pktgen.o
obj-$(CONFIG_NET_RADIO) += wireless.o
diff --git a/net/core/datagram.c b/net/core/datagram.c
index fcee054b6f75..da9bf71421a7 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -43,7 +43,6 @@
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/inet.h>
-#include <linux/tcp.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/poll.h>
@@ -51,9 +50,10 @@
#include <net/protocol.h>
#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/checksum.h>
+#include <net/checksum.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
/*
* Is a socket 'connection oriented' ?
diff --git a/net/core/dev.c b/net/core/dev.c
index faf59b02c4bf..c01511e3d0c1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -267,10 +267,6 @@ void dev_add_pack(struct packet_type *pt)
spin_unlock_bh(&ptype_lock);
}
-extern void linkwatch_run_queue(void);
-
-
-
/**
* __dev_remove_pack - remove packet handler
* @pt: packet type declaration
@@ -1009,13 +1005,22 @@ void net_disable_timestamp(void)
atomic_dec(&netstamp_needed);
}
-static inline void net_timestamp(struct timeval *stamp)
+void __net_timestamp(struct sk_buff *skb)
+{
+ struct timeval tv;
+
+ do_gettimeofday(&tv);
+ skb_set_timestamp(skb, &tv);
+}
+EXPORT_SYMBOL(__net_timestamp);
+
+static inline void net_timestamp(struct sk_buff *skb)
{
if (atomic_read(&netstamp_needed))
- do_gettimeofday(stamp);
+ __net_timestamp(skb);
else {
- stamp->tv_sec = 0;
- stamp->tv_usec = 0;
+ skb->tstamp.off_sec = 0;
+ skb->tstamp.off_usec = 0;
}
}
@@ -1027,7 +1032,8 @@ static inline void net_timestamp(struct timeval *stamp)
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
{
struct packet_type *ptype;
- net_timestamp(&skb->stamp);
+
+ net_timestamp(skb);
rcu_read_lock();
list_for_each_entry_rcu(ptype, &ptype_all, list) {
@@ -1058,7 +1064,7 @@ void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
skb2->h.raw = skb2->nh.raw;
skb2->pkt_type = PACKET_OUTGOING;
- ptype->func(skb2, skb->dev, ptype);
+ ptype->func(skb2, skb->dev, ptype, skb->dev);
}
}
rcu_read_unlock();
@@ -1123,8 +1129,6 @@ static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
#define illegal_highdma(dev, skb) (0)
#endif
-extern void skb_release_data(struct sk_buff *);
-
/* Keep head the same: replace data */
int __skb_linearize(struct sk_buff *skb, unsigned int __nocast gfp_mask)
{
@@ -1379,8 +1383,8 @@ int netif_rx(struct sk_buff *skb)
if (netpoll_rx(skb))
return NET_RX_DROP;
- if (!skb->stamp.tv_sec)
- net_timestamp(&skb->stamp);
+ if (!skb->tstamp.off_sec)
+ net_timestamp(skb);
/*
* The code is rearranged so that the path is the most
@@ -1425,14 +1429,14 @@ int netif_rx_ni(struct sk_buff *skb)
EXPORT_SYMBOL(netif_rx_ni);
-static __inline__ void skb_bond(struct sk_buff *skb)
+static inline struct net_device *skb_bond(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
- if (dev->master) {
- skb->real_dev = skb->dev;
+ if (dev->master)
skb->dev = dev->master;
- }
+
+ return dev;
}
static void net_tx_action(struct softirq_action *h)
@@ -1482,10 +1486,11 @@ static void net_tx_action(struct softirq_action *h)
}
static __inline__ int deliver_skb(struct sk_buff *skb,
- struct packet_type *pt_prev)
+ struct packet_type *pt_prev,
+ struct net_device *orig_dev)
{
atomic_inc(&skb->users);
- return pt_prev->func(skb, skb->dev, pt_prev);
+ return pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
}
#if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE)
@@ -1496,7 +1501,8 @@ struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
static __inline__ int handle_bridge(struct sk_buff **pskb,
- struct packet_type **pt_prev, int *ret)
+ struct packet_type **pt_prev, int *ret,
+ struct net_device *orig_dev)
{
struct net_bridge_port *port;
@@ -1505,14 +1511,14 @@ static __inline__ int handle_bridge(struct sk_buff **pskb,
return 0;
if (*pt_prev) {
- *ret = deliver_skb(*pskb, *pt_prev);
+ *ret = deliver_skb(*pskb, *pt_prev, orig_dev);
*pt_prev = NULL;
}
return br_handle_frame_hook(port, pskb);
}
#else
-#define handle_bridge(skb, pt_prev, ret) (0)
+#define handle_bridge(skb, pt_prev, ret, orig_dev) (0)
#endif
#ifdef CONFIG_NET_CLS_ACT
@@ -1534,17 +1540,14 @@ static int ing_filter(struct sk_buff *skb)
__u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd);
if (MAX_RED_LOOP < ttl++) {
printk("Redir loop detected Dropping packet (%s->%s)\n",
- skb->input_dev?skb->input_dev->name:"??",skb->dev->name);
+ skb->input_dev->name, skb->dev->name);
return TC_ACT_SHOT;
}
skb->tc_verd = SET_TC_RTTL(skb->tc_verd,ttl);
skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS);
- if (NULL == skb->input_dev) {
- skb->input_dev = skb->dev;
- printk("ing_filter: fixed %s out %s\n",skb->input_dev->name,skb->dev->name);
- }
+
spin_lock(&dev->ingress_lock);
if ((q = dev->qdisc_ingress) != NULL)
result = q->enqueue(skb, q);
@@ -1559,6 +1562,7 @@ static int ing_filter(struct sk_buff *skb)
int netif_receive_skb(struct sk_buff *skb)
{
struct packet_type *ptype, *pt_prev;
+ struct net_device *orig_dev;
int ret = NET_RX_DROP;
unsigned short type;
@@ -1566,10 +1570,13 @@ int netif_receive_skb(struct sk_buff *skb)
if (skb->dev->poll && netpoll_rx(skb))
return NET_RX_DROP;
- if (!skb->stamp.tv_sec)
- net_timestamp(&skb->stamp);
+ if (!skb->tstamp.off_sec)
+ net_timestamp(skb);
+
+ if (!skb->input_dev)
+ skb->input_dev = skb->dev;
- skb_bond(skb);
+ orig_dev = skb_bond(skb);
__get_cpu_var(netdev_rx_stat).total++;
@@ -1590,14 +1597,14 @@ int netif_receive_skb(struct sk_buff *skb)
list_for_each_entry_rcu(ptype, &ptype_all, list) {
if (!ptype->dev || ptype->dev == skb->dev) {
if (pt_prev)
- ret = deliver_skb(skb, pt_prev);
+ ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
}
}
#ifdef CONFIG_NET_CLS_ACT
if (pt_prev) {
- ret = deliver_skb(skb, pt_prev);
+ ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = NULL; /* noone else should process this after*/
} else {
skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
@@ -1616,7 +1623,7 @@ ncls:
handle_diverter(skb);
- if (handle_bridge(&skb, &pt_prev, &ret))
+ if (handle_bridge(&skb, &pt_prev, &ret, orig_dev))
goto out;
type = skb->protocol;
@@ -1624,13 +1631,13 @@ ncls:
if (ptype->type == type &&
(!ptype->dev || ptype->dev == skb->dev)) {
if (pt_prev)
- ret = deliver_skb(skb, pt_prev);
+ ret = deliver_skb(skb, pt_prev, orig_dev);
pt_prev = ptype;
}
}
if (pt_prev) {
- ret = pt_prev->func(skb, skb->dev, pt_prev);
+ ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev);
} else {
kfree_skb(skb);
/* Jamal, now you will not able to escape explaining
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index a3eeb88e1c81..289c1b5a8e4a 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -81,6 +81,18 @@ int ethtool_op_set_tso(struct net_device *dev, u32 data)
return 0;
}
+int ethtool_op_get_perm_addr(struct net_device *dev, struct ethtool_perm_addr *addr, u8 *data)
+{
+ unsigned char len = dev->addr_len;
+ if ( addr->size < len )
+ return -ETOOSMALL;
+
+ addr->size = len;
+ memcpy(data, dev->perm_addr, len);
+ return 0;
+}
+
+
/* Handlers for each ethtool command */
static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
@@ -683,6 +695,39 @@ static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
return ret;
}
+static int ethtool_get_perm_addr(struct net_device *dev, void *useraddr)
+{
+ struct ethtool_perm_addr epaddr;
+ u8 *data;
+ int ret;
+
+ if (!dev->ethtool_ops->get_perm_addr)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&epaddr,useraddr,sizeof(epaddr)))
+ return -EFAULT;
+
+ data = kmalloc(epaddr.size, GFP_USER);
+ if (!data)
+ return -ENOMEM;
+
+ ret = dev->ethtool_ops->get_perm_addr(dev,&epaddr,data);
+ if (ret)
+ return ret;
+
+ ret = -EFAULT;
+ if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
+ goto out;
+ useraddr += sizeof(epaddr);
+ if (copy_to_user(useraddr, data, epaddr.size))
+ goto out;
+ ret = 0;
+
+ out:
+ kfree(data);
+ return ret;
+}
+
/* The main entry point in this file. Called from net/core/dev.c */
int dev_ethtool(struct ifreq *ifr)
@@ -806,6 +851,9 @@ int dev_ethtool(struct ifreq *ifr)
case ETHTOOL_GSTATS:
rc = ethtool_get_stats(dev, useraddr);
break;
+ case ETHTOOL_GPERMADDR:
+ rc = ethtool_get_perm_addr(dev, useraddr);
+ break;
default:
rc = -EOPNOTSUPP;
}
@@ -826,6 +874,7 @@ int dev_ethtool(struct ifreq *ifr)
EXPORT_SYMBOL(dev_ethtool);
EXPORT_SYMBOL(ethtool_op_get_link);
+EXPORT_SYMBOL_GPL(ethtool_op_get_perm_addr);
EXPORT_SYMBOL(ethtool_op_get_sg);
EXPORT_SYMBOL(ethtool_op_get_tso);
EXPORT_SYMBOL(ethtool_op_get_tx_csum);
diff --git a/net/core/flow.c b/net/core/flow.c
index f289570b15a3..7e95b39de9fd 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -42,7 +42,7 @@ static DEFINE_PER_CPU(struct flow_cache_entry **, flow_tables) = { NULL };
#define flow_table(cpu) (per_cpu(flow_tables, cpu))
-static kmem_cache_t *flow_cachep;
+static kmem_cache_t *flow_cachep __read_mostly;
static int flow_lwm, flow_hwm;
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 1beb782ac41b..39fc55edf691 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1217,7 +1217,7 @@ static void neigh_proxy_process(unsigned long arg)
while (skb != (struct sk_buff *)&tbl->proxy_queue) {
struct sk_buff *back = skb;
- long tdif = back->stamp.tv_usec - now;
+ long tdif = NEIGH_CB(back)->sched_next - now;
skb = skb->next;
if (tdif <= 0) {
@@ -1248,8 +1248,9 @@ void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
kfree_skb(skb);
return;
}
- skb->stamp.tv_sec = LOCALLY_ENQUEUED;
- skb->stamp.tv_usec = sched_next;
+
+ NEIGH_CB(skb)->sched_next = sched_next;
+ NEIGH_CB(skb)->flags |= LOCALLY_ENQUEUED;
spin_lock(&tbl->proxy_queue.lock);
if (del_timer(&tbl->proxy_timer)) {
@@ -2342,8 +2343,8 @@ void neigh_app_ns(struct neighbour *n)
}
nlh = (struct nlmsghdr *)skb->data;
nlh->nlmsg_flags = NLM_F_REQUEST;
- NETLINK_CB(skb).dst_groups = RTMGRP_NEIGH;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_NEIGH, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = RTNLGRP_NEIGH;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_NEIGH, GFP_ATOMIC);
}
static void neigh_app_notify(struct neighbour *n)
@@ -2360,8 +2361,8 @@ static void neigh_app_notify(struct neighbour *n)
return;
}
nlh = (struct nlmsghdr *)skb->data;
- NETLINK_CB(skb).dst_groups = RTMGRP_NEIGH;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_NEIGH, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = RTNLGRP_NEIGH;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_NEIGH, GFP_ATOMIC);
}
#endif /* CONFIG_ARPD */
diff --git a/net/core/netfilter.c b/net/core/netfilter.c
deleted file mode 100644
index 076c156d5eda..000000000000
--- a/net/core/netfilter.c
+++ /dev/null
@@ -1,648 +0,0 @@
-/* netfilter.c: look after the filters for various protocols.
- * Heavily influenced by the old firewall.c by David Bonn and Alan Cox.
- *
- * Thanks to Rob `CmdrTaco' Malda for not influencing this code in any
- * way.
- *
- * Rusty Russell (C)2000 -- This code is GPL.
- *
- * February 2000: Modified by James Morris to have 1 queue per protocol.
- * 15-Mar-2000: Added NF_REPEAT --RR.
- * 08-May-2003: Internal logging interface added by Jozsef Kadlecsik.
- */
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/netfilter.h>
-#include <net/protocol.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/wait.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/if.h>
-#include <linux/netdevice.h>
-#include <linux/inetdevice.h>
-#include <linux/tcp.h>
-#include <linux/udp.h>
-#include <linux/icmp.h>
-#include <net/sock.h>
-#include <net/route.h>
-#include <linux/ip.h>
-
-/* In this code, we can be waiting indefinitely for userspace to
- * service a packet if a hook returns NF_QUEUE. We could keep a count
- * of skbuffs queued for userspace, and not deregister a hook unless
- * this is zero, but that sucks. Now, we simply check when the
- * packets come back: if the hook is gone, the packet is discarded. */
-#ifdef CONFIG_NETFILTER_DEBUG
-#define NFDEBUG(format, args...) printk(format , ## args)
-#else
-#define NFDEBUG(format, args...)
-#endif
-
-/* Sockopts only registered and called from user context, so
- net locking would be overkill. Also, [gs]etsockopt calls may
- sleep. */
-static DECLARE_MUTEX(nf_sockopt_mutex);
-
-struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
-static LIST_HEAD(nf_sockopts);
-static DEFINE_SPINLOCK(nf_hook_lock);
-
-/*
- * A queue handler may be registered for each protocol. Each is protected by
- * long term mutex. The handler must provide an an outfn() to accept packets
- * for queueing and must reinject all packets it receives, no matter what.
- */
-static struct nf_queue_handler_t {
- nf_queue_outfn_t outfn;
- void *data;
-} queue_handler[NPROTO];
-static DEFINE_RWLOCK(queue_handler_lock);
-
-int nf_register_hook(struct nf_hook_ops *reg)
-{
- struct list_head *i;
-
- spin_lock_bh(&nf_hook_lock);
- list_for_each(i, &nf_hooks[reg->pf][reg->hooknum]) {
- if (reg->priority < ((struct nf_hook_ops *)i)->priority)
- break;
- }
- list_add_rcu(&reg->list, i->prev);
- spin_unlock_bh(&nf_hook_lock);
-
- synchronize_net();
- return 0;
-}
-
-void nf_unregister_hook(struct nf_hook_ops *reg)
-{
- spin_lock_bh(&nf_hook_lock);
- list_del_rcu(&reg->list);
- spin_unlock_bh(&nf_hook_lock);
-
- synchronize_net();
-}
-
-/* Do exclusive ranges overlap? */
-static inline int overlap(int min1, int max1, int min2, int max2)
-{
- return max1 > min2 && min1 < max2;
-}
-
-/* Functions to register sockopt ranges (exclusive). */
-int nf_register_sockopt(struct nf_sockopt_ops *reg)
-{
- struct list_head *i;
- int ret = 0;
-
- if (down_interruptible(&nf_sockopt_mutex) != 0)
- return -EINTR;
-
- list_for_each(i, &nf_sockopts) {
- struct nf_sockopt_ops *ops = (struct nf_sockopt_ops *)i;
- if (ops->pf == reg->pf
- && (overlap(ops->set_optmin, ops->set_optmax,
- reg->set_optmin, reg->set_optmax)
- || overlap(ops->get_optmin, ops->get_optmax,
- reg->get_optmin, reg->get_optmax))) {
- NFDEBUG("nf_sock overlap: %u-%u/%u-%u v %u-%u/%u-%u\n",
- ops->set_optmin, ops->set_optmax,
- ops->get_optmin, ops->get_optmax,
- reg->set_optmin, reg->set_optmax,
- reg->get_optmin, reg->get_optmax);
- ret = -EBUSY;
- goto out;
- }
- }
-
- list_add(&reg->list, &nf_sockopts);
-out:
- up(&nf_sockopt_mutex);
- return ret;
-}
-
-void nf_unregister_sockopt(struct nf_sockopt_ops *reg)
-{
- /* No point being interruptible: we're probably in cleanup_module() */
- restart:
- down(&nf_sockopt_mutex);
- if (reg->use != 0) {
- /* To be woken by nf_sockopt call... */
- /* FIXME: Stuart Young's name appears gratuitously. */
- set_current_state(TASK_UNINTERRUPTIBLE);
- reg->cleanup_task = current;
- up(&nf_sockopt_mutex);
- schedule();
- goto restart;
- }
- list_del(&reg->list);
- up(&nf_sockopt_mutex);
-}
-
-/* Call get/setsockopt() */
-static int nf_sockopt(struct sock *sk, int pf, int val,
- char __user *opt, int *len, int get)
-{
- struct list_head *i;
- struct nf_sockopt_ops *ops;
- int ret;
-
- if (down_interruptible(&nf_sockopt_mutex) != 0)
- return -EINTR;
-
- list_for_each(i, &nf_sockopts) {
- ops = (struct nf_sockopt_ops *)i;
- if (ops->pf == pf) {
- if (get) {
- if (val >= ops->get_optmin
- && val < ops->get_optmax) {
- ops->use++;
- up(&nf_sockopt_mutex);
- ret = ops->get(sk, val, opt, len);
- goto out;
- }
- } else {
- if (val >= ops->set_optmin
- && val < ops->set_optmax) {
- ops->use++;
- up(&nf_sockopt_mutex);
- ret = ops->set(sk, val, opt, *len);
- goto out;
- }
- }
- }
- }
- up(&nf_sockopt_mutex);
- return -ENOPROTOOPT;
-
- out:
- down(&nf_sockopt_mutex);
- ops->use--;
- if (ops->cleanup_task)
- wake_up_process(ops->cleanup_task);
- up(&nf_sockopt_mutex);
- return ret;
-}
-
-int nf_setsockopt(struct sock *sk, int pf, int val, char __user *opt,
- int len)
-{
- return nf_sockopt(sk, pf, val, opt, &len, 0);
-}
-
-int nf_getsockopt(struct sock *sk, int pf, int val, char __user *opt, int *len)
-{
- return nf_sockopt(sk, pf, val, opt, len, 1);
-}
-
-static unsigned int nf_iterate(struct list_head *head,
- struct sk_buff **skb,
- int hook,
- const struct net_device *indev,
- const struct net_device *outdev,
- struct list_head **i,
- int (*okfn)(struct sk_buff *),
- int hook_thresh)
-{
- unsigned int verdict;
-
- /*
- * The caller must not block between calls to this
- * function because of risk of continuing from deleted element.
- */
- list_for_each_continue_rcu(*i, head) {
- struct nf_hook_ops *elem = (struct nf_hook_ops *)*i;
-
- if (hook_thresh > elem->priority)
- continue;
-
- /* Optimization: we don't need to hold module
- reference here, since function can't sleep. --RR */
- verdict = elem->hook(hook, skb, indev, outdev, okfn);
- if (verdict != NF_ACCEPT) {
-#ifdef CONFIG_NETFILTER_DEBUG
- if (unlikely(verdict > NF_MAX_VERDICT)) {
- NFDEBUG("Evil return from %p(%u).\n",
- elem->hook, hook);
- continue;
- }
-#endif
- if (verdict != NF_REPEAT)
- return verdict;
- *i = (*i)->prev;
- }
- }
- return NF_ACCEPT;
-}
-
-int nf_register_queue_handler(int pf, nf_queue_outfn_t outfn, void *data)
-{
- int ret;
-
- write_lock_bh(&queue_handler_lock);
- if (queue_handler[pf].outfn)
- ret = -EBUSY;
- else {
- queue_handler[pf].outfn = outfn;
- queue_handler[pf].data = data;
- ret = 0;
- }
- write_unlock_bh(&queue_handler_lock);
-
- return ret;
-}
-
-/* The caller must flush their queue before this */
-int nf_unregister_queue_handler(int pf)
-{
- write_lock_bh(&queue_handler_lock);
- queue_handler[pf].outfn = NULL;
- queue_handler[pf].data = NULL;
- write_unlock_bh(&queue_handler_lock);
-
- return 0;
-}
-
-/*
- * Any packet that leaves via this function must come back
- * through nf_reinject().
- */
-static int nf_queue(struct sk_buff *skb,
- struct list_head *elem,
- int pf, unsigned int hook,
- struct net_device *indev,
- struct net_device *outdev,
- int (*okfn)(struct sk_buff *))
-{
- int status;
- struct nf_info *info;
-#ifdef CONFIG_BRIDGE_NETFILTER
- struct net_device *physindev = NULL;
- struct net_device *physoutdev = NULL;
-#endif
-
- /* QUEUE == DROP if noone is waiting, to be safe. */
- read_lock(&queue_handler_lock);
- if (!queue_handler[pf].outfn) {
- read_unlock(&queue_handler_lock);
- kfree_skb(skb);
- return 1;
- }
-
- info = kmalloc(sizeof(*info), GFP_ATOMIC);
- if (!info) {
- if (net_ratelimit())
- printk(KERN_ERR "OOM queueing packet %p\n",
- skb);
- read_unlock(&queue_handler_lock);
- kfree_skb(skb);
- return 1;
- }
-
- *info = (struct nf_info) {
- (struct nf_hook_ops *)elem, pf, hook, indev, outdev, okfn };
-
- /* If it's going away, ignore hook. */
- if (!try_module_get(info->elem->owner)) {
- read_unlock(&queue_handler_lock);
- kfree(info);
- return 0;
- }
-
- /* Bump dev refs so they don't vanish while packet is out */
- if (indev) dev_hold(indev);
- if (outdev) dev_hold(outdev);
-
-#ifdef CONFIG_BRIDGE_NETFILTER
- if (skb->nf_bridge) {
- physindev = skb->nf_bridge->physindev;
- if (physindev) dev_hold(physindev);
- physoutdev = skb->nf_bridge->physoutdev;
- if (physoutdev) dev_hold(physoutdev);
- }
-#endif
-
- status = queue_handler[pf].outfn(skb, info, queue_handler[pf].data);
- read_unlock(&queue_handler_lock);
-
- if (status < 0) {
- /* James M doesn't say fuck enough. */
- if (indev) dev_put(indev);
- if (outdev) dev_put(outdev);
-#ifdef CONFIG_BRIDGE_NETFILTER
- if (physindev) dev_put(physindev);
- if (physoutdev) dev_put(physoutdev);
-#endif
- module_put(info->elem->owner);
- kfree(info);
- kfree_skb(skb);
- return 1;
- }
- return 1;
-}
-
-/* Returns 1 if okfn() needs to be executed by the caller,
- * -EPERM for NF_DROP, 0 otherwise. */
-int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb,
- struct net_device *indev,
- struct net_device *outdev,
- int (*okfn)(struct sk_buff *),
- int hook_thresh)
-{
- struct list_head *elem;
- unsigned int verdict;
- int ret = 0;
-
- /* We may already have this, but read-locks nest anyway */
- rcu_read_lock();
-
- elem = &nf_hooks[pf][hook];
-next_hook:
- verdict = nf_iterate(&nf_hooks[pf][hook], pskb, hook, indev,
- outdev, &elem, okfn, hook_thresh);
- if (verdict == NF_ACCEPT || verdict == NF_STOP) {
- ret = 1;
- goto unlock;
- } else if (verdict == NF_DROP) {
- kfree_skb(*pskb);
- ret = -EPERM;
- } else if (verdict == NF_QUEUE) {
- NFDEBUG("nf_hook: Verdict = QUEUE.\n");
- if (!nf_queue(*pskb, elem, pf, hook, indev, outdev, okfn))
- goto next_hook;
- }
-unlock:
- rcu_read_unlock();
- return ret;
-}
-
-void nf_reinject(struct sk_buff *skb, struct nf_info *info,
- unsigned int verdict)
-{
- struct list_head *elem = &info->elem->list;
- struct list_head *i;
-
- rcu_read_lock();
-
- /* Release those devices we held, or Alexey will kill me. */
- if (info->indev) dev_put(info->indev);
- if (info->outdev) dev_put(info->outdev);
-#ifdef CONFIG_BRIDGE_NETFILTER
- if (skb->nf_bridge) {
- if (skb->nf_bridge->physindev)
- dev_put(skb->nf_bridge->physindev);
- if (skb->nf_bridge->physoutdev)
- dev_put(skb->nf_bridge->physoutdev);
- }
-#endif
-
- /* Drop reference to owner of hook which queued us. */
- module_put(info->elem->owner);
-
- list_for_each_rcu(i, &nf_hooks[info->pf][info->hook]) {
- if (i == elem)
- break;
- }
-
- if (elem == &nf_hooks[info->pf][info->hook]) {
- /* The module which sent it to userspace is gone. */
- NFDEBUG("%s: module disappeared, dropping packet.\n",
- __FUNCTION__);
- verdict = NF_DROP;
- }
-
- /* Continue traversal iff userspace said ok... */
- if (verdict == NF_REPEAT) {
- elem = elem->prev;
- verdict = NF_ACCEPT;
- }
-
- if (verdict == NF_ACCEPT) {
- next_hook:
- verdict = nf_iterate(&nf_hooks[info->pf][info->hook],
- &skb, info->hook,
- info->indev, info->outdev, &elem,
- info->okfn, INT_MIN);
- }
-
- switch (verdict) {
- case NF_ACCEPT:
- info->okfn(skb);
- break;
-
- case NF_QUEUE:
- if (!nf_queue(skb, elem, info->pf, info->hook,
- info->indev, info->outdev, info->okfn))
- goto next_hook;
- break;
- }
- rcu_read_unlock();
-
- if (verdict == NF_DROP)
- kfree_skb(skb);
-
- kfree(info);
- return;
-}
-
-#ifdef CONFIG_INET
-/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
-int ip_route_me_harder(struct sk_buff **pskb)
-{
- struct iphdr *iph = (*pskb)->nh.iph;
- struct rtable *rt;
- struct flowi fl = {};
- struct dst_entry *odst;
- unsigned int hh_len;
-
- /* some non-standard hacks like ipt_REJECT.c:send_reset() can cause
- * packets with foreign saddr to appear on the NF_IP_LOCAL_OUT hook.
- */
- if (inet_addr_type(iph->saddr) == RTN_LOCAL) {
- fl.nl_u.ip4_u.daddr = iph->daddr;
- fl.nl_u.ip4_u.saddr = iph->saddr;
- fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
- fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0;
-#ifdef CONFIG_IP_ROUTE_FWMARK
- fl.nl_u.ip4_u.fwmark = (*pskb)->nfmark;
-#endif
- fl.proto = iph->protocol;
- if (ip_route_output_key(&rt, &fl) != 0)
- return -1;
-
- /* Drop old route. */
- dst_release((*pskb)->dst);
- (*pskb)->dst = &rt->u.dst;
- } else {
- /* non-local src, find valid iif to satisfy
- * rp-filter when calling ip_route_input. */
- fl.nl_u.ip4_u.daddr = iph->saddr;
- if (ip_route_output_key(&rt, &fl) != 0)
- return -1;
-
- odst = (*pskb)->dst;
- if (ip_route_input(*pskb, iph->daddr, iph->saddr,
- RT_TOS(iph->tos), rt->u.dst.dev) != 0) {
- dst_release(&rt->u.dst);
- return -1;
- }
- dst_release(&rt->u.dst);
- dst_release(odst);
- }
-
- if ((*pskb)->dst->error)
- return -1;
-
- /* Change in oif may mean change in hh_len. */
- hh_len = (*pskb)->dst->dev->hard_header_len;
- if (skb_headroom(*pskb) < hh_len) {
- struct sk_buff *nskb;
-
- nskb = skb_realloc_headroom(*pskb, hh_len);
- if (!nskb)
- return -1;
- if ((*pskb)->sk)
- skb_set_owner_w(nskb, (*pskb)->sk);
- kfree_skb(*pskb);
- *pskb = nskb;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(ip_route_me_harder);
-
-int skb_ip_make_writable(struct sk_buff **pskb, unsigned int writable_len)
-{
- struct sk_buff *nskb;
-
- if (writable_len > (*pskb)->len)
- return 0;
-
- /* Not exclusive use of packet? Must copy. */
- if (skb_shared(*pskb) || skb_cloned(*pskb))
- goto copy_skb;
-
- return pskb_may_pull(*pskb, writable_len);
-
-copy_skb:
- nskb = skb_copy(*pskb, GFP_ATOMIC);
- if (!nskb)
- return 0;
- BUG_ON(skb_is_nonlinear(nskb));
-
- /* Rest of kernel will get very unhappy if we pass it a
- suddenly-orphaned skbuff */
- if ((*pskb)->sk)
- skb_set_owner_w(nskb, (*pskb)->sk);
- kfree_skb(*pskb);
- *pskb = nskb;
- return 1;
-}
-EXPORT_SYMBOL(skb_ip_make_writable);
-#endif /*CONFIG_INET*/
-
-/* Internal logging interface, which relies on the real
- LOG target modules */
-
-#define NF_LOG_PREFIXLEN 128
-
-static nf_logfn *nf_logging[NPROTO]; /* = NULL */
-static int reported = 0;
-static DEFINE_SPINLOCK(nf_log_lock);
-
-int nf_log_register(int pf, nf_logfn *logfn)
-{
- int ret = -EBUSY;
-
- /* Any setup of logging members must be done before
- * substituting pointer. */
- spin_lock(&nf_log_lock);
- if (!nf_logging[pf]) {
- rcu_assign_pointer(nf_logging[pf], logfn);
- ret = 0;
- }
- spin_unlock(&nf_log_lock);
- return ret;
-}
-
-void nf_log_unregister(int pf, nf_logfn *logfn)
-{
- spin_lock(&nf_log_lock);
- if (nf_logging[pf] == logfn)
- nf_logging[pf] = NULL;
- spin_unlock(&nf_log_lock);
-
- /* Give time to concurrent readers. */
- synchronize_net();
-}
-
-void nf_log_packet(int pf,
- unsigned int hooknum,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const char *fmt, ...)
-{
- va_list args;
- char prefix[NF_LOG_PREFIXLEN];
- nf_logfn *logfn;
-
- rcu_read_lock();
- logfn = rcu_dereference(nf_logging[pf]);
- if (logfn) {
- va_start(args, fmt);
- vsnprintf(prefix, sizeof(prefix), fmt, args);
- va_end(args);
- /* We must read logging before nf_logfn[pf] */
- logfn(hooknum, skb, in, out, prefix);
- } else if (!reported) {
- printk(KERN_WARNING "nf_log_packet: can\'t log yet, "
- "no backend logging module loaded in!\n");
- reported++;
- }
- rcu_read_unlock();
-}
-EXPORT_SYMBOL(nf_log_register);
-EXPORT_SYMBOL(nf_log_unregister);
-EXPORT_SYMBOL(nf_log_packet);
-
-/* This does not belong here, but locally generated errors need it if connection
- tracking in use: without this, connection may not be in hash table, and hence
- manufactured ICMP or RST packets will not be associated with it. */
-void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
-
-void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb)
-{
- void (*attach)(struct sk_buff *, struct sk_buff *);
-
- if (skb->nfct && (attach = ip_ct_attach) != NULL) {
- mb(); /* Just to be sure: must be read before executing this */
- attach(new, skb);
- }
-}
-
-void __init netfilter_init(void)
-{
- int i, h;
-
- for (i = 0; i < NPROTO; i++) {
- for (h = 0; h < NF_MAX_HOOKS; h++)
- INIT_LIST_HEAD(&nf_hooks[i][h]);
- }
-}
-
-EXPORT_SYMBOL(ip_ct_attach);
-EXPORT_SYMBOL(nf_ct_attach);
-EXPORT_SYMBOL(nf_getsockopt);
-EXPORT_SYMBOL(nf_hook_slow);
-EXPORT_SYMBOL(nf_hooks);
-EXPORT_SYMBOL(nf_register_hook);
-EXPORT_SYMBOL(nf_register_queue_handler);
-EXPORT_SYMBOL(nf_register_sockopt);
-EXPORT_SYMBOL(nf_reinject);
-EXPORT_SYMBOL(nf_setsockopt);
-EXPORT_SYMBOL(nf_unregister_hook);
-EXPORT_SYMBOL(nf_unregister_queue_handler);
-EXPORT_SYMBOL(nf_unregister_sockopt);
diff --git a/net/core/request_sock.c b/net/core/request_sock.c
index bb55675f0685..b8203de5ff07 100644
--- a/net/core/request_sock.c
+++ b/net/core/request_sock.c
@@ -32,7 +32,6 @@
* Further increasing requires to change hash table size.
*/
int sysctl_max_syn_backlog = 256;
-EXPORT_SYMBOL(sysctl_max_syn_backlog);
int reqsk_queue_alloc(struct request_sock_queue *queue,
const int nr_table_entries)
@@ -53,6 +52,8 @@ int reqsk_queue_alloc(struct request_sock_queue *queue,
get_random_bytes(&lopt->hash_rnd, sizeof(lopt->hash_rnd));
rwlock_init(&queue->syn_wait_lock);
queue->rskq_accept_head = queue->rskq_accept_head = NULL;
+ queue->rskq_defer_accept = 0;
+ lopt->nr_table_entries = nr_table_entries;
write_lock_bh(&queue->syn_wait_lock);
queue->listen_opt = lopt;
@@ -62,3 +63,28 @@ int reqsk_queue_alloc(struct request_sock_queue *queue,
}
EXPORT_SYMBOL(reqsk_queue_alloc);
+
+void reqsk_queue_destroy(struct request_sock_queue *queue)
+{
+ /* make all the listen_opt local to us */
+ struct listen_sock *lopt = reqsk_queue_yank_listen_sk(queue);
+
+ if (lopt->qlen != 0) {
+ int i;
+
+ for (i = 0; i < lopt->nr_table_entries; i++) {
+ struct request_sock *req;
+
+ while ((req = lopt->syn_table[i]) != NULL) {
+ lopt->syn_table[i] = req->dl_next;
+ lopt->qlen--;
+ reqsk_free(req);
+ }
+ }
+ }
+
+ BUG_TRAP(lopt->qlen == 0);
+ kfree(lopt);
+}
+
+EXPORT_SYMBOL(reqsk_queue_destroy);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 4b1bb30e6381..9bed7569ce3f 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -148,7 +148,7 @@ int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
{
int err = 0;
- NETLINK_CB(skb).dst_groups = group;
+ NETLINK_CB(skb).dst_group = group;
if (echo)
atomic_inc(&skb->users);
netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
@@ -458,8 +458,8 @@ void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
kfree_skb(skb);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_KERNEL);
+ NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_KERNEL);
}
static int rtnetlink_done(struct netlink_callback *cb)
@@ -708,7 +708,8 @@ void __init rtnetlink_init(void)
if (!rta_buf)
panic("rtnetlink_init: cannot allocate rta_buf\n");
- rtnl = netlink_kernel_create(NETLINK_ROUTE, rtnetlink_rcv);
+ rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv,
+ THIS_MODULE);
if (rtnl == NULL)
panic("rtnetlink_init: cannot initialize rtnetlink\n");
netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 7eab867ede59..f80a28785610 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -68,7 +68,10 @@
#include <asm/uaccess.h>
#include <asm/system.h>
-static kmem_cache_t *skbuff_head_cache;
+static kmem_cache_t *skbuff_head_cache __read_mostly;
+static kmem_cache_t *skbuff_fclone_cache __read_mostly;
+
+struct timeval __read_mostly skb_tv_base;
/*
* Keep out-of-line to prevent kernel bloat.
@@ -118,7 +121,7 @@ void skb_under_panic(struct sk_buff *skb, int sz, void *here)
*/
/**
- * alloc_skb - allocate a network buffer
+ * __alloc_skb - allocate a network buffer
* @size: size to allocate
* @gfp_mask: allocation mask
*
@@ -129,14 +132,20 @@ void skb_under_panic(struct sk_buff *skb, int sz, void *here)
* Buffers may only be allocated from interrupts using a @gfp_mask of
* %GFP_ATOMIC.
*/
-struct sk_buff *alloc_skb(unsigned int size, unsigned int __nocast gfp_mask)
+struct sk_buff *__alloc_skb(unsigned int size, unsigned int __nocast gfp_mask,
+ int fclone)
{
struct sk_buff *skb;
u8 *data;
/* Get the HEAD */
- skb = kmem_cache_alloc(skbuff_head_cache,
- gfp_mask & ~__GFP_DMA);
+ if (fclone)
+ skb = kmem_cache_alloc(skbuff_fclone_cache,
+ gfp_mask & ~__GFP_DMA);
+ else
+ skb = kmem_cache_alloc(skbuff_head_cache,
+ gfp_mask & ~__GFP_DMA);
+
if (!skb)
goto out;
@@ -153,7 +162,15 @@ struct sk_buff *alloc_skb(unsigned int size, unsigned int __nocast gfp_mask)
skb->data = data;
skb->tail = data;
skb->end = data + size;
+ if (fclone) {
+ struct sk_buff *child = skb + 1;
+ atomic_t *fclone_ref = (atomic_t *) (child + 1);
+ skb->fclone = SKB_FCLONE_ORIG;
+ atomic_set(fclone_ref, 1);
+
+ child->fclone = SKB_FCLONE_UNAVAILABLE;
+ }
atomic_set(&(skb_shinfo(skb)->dataref), 1);
skb_shinfo(skb)->nr_frags = 0;
skb_shinfo(skb)->tso_size = 0;
@@ -266,8 +283,34 @@ void skb_release_data(struct sk_buff *skb)
*/
void kfree_skbmem(struct sk_buff *skb)
{
+ struct sk_buff *other;
+ atomic_t *fclone_ref;
+
skb_release_data(skb);
- kmem_cache_free(skbuff_head_cache, skb);
+ switch (skb->fclone) {
+ case SKB_FCLONE_UNAVAILABLE:
+ kmem_cache_free(skbuff_head_cache, skb);
+ break;
+
+ case SKB_FCLONE_ORIG:
+ fclone_ref = (atomic_t *) (skb + 2);
+ if (atomic_dec_and_test(fclone_ref))
+ kmem_cache_free(skbuff_fclone_cache, skb);
+ break;
+
+ case SKB_FCLONE_CLONE:
+ fclone_ref = (atomic_t *) (skb + 1);
+ other = skb - 1;
+
+ /* The clone portion is available for
+ * fast-cloning again.
+ */
+ skb->fclone = SKB_FCLONE_UNAVAILABLE;
+
+ if (atomic_dec_and_test(fclone_ref))
+ kmem_cache_free(skbuff_fclone_cache, other);
+ break;
+ };
}
/**
@@ -281,8 +324,6 @@ void kfree_skbmem(struct sk_buff *skb)
void __kfree_skb(struct sk_buff *skb)
{
- BUG_ON(skb->list != NULL);
-
dst_release(skb->dst);
#ifdef CONFIG_XFRM
secpath_put(skb->sp);
@@ -302,7 +343,6 @@ void __kfree_skb(struct sk_buff *skb)
skb->tc_index = 0;
#ifdef CONFIG_NET_CLS_ACT
skb->tc_verd = 0;
- skb->tc_classid = 0;
#endif
#endif
@@ -325,19 +365,27 @@ void __kfree_skb(struct sk_buff *skb)
struct sk_buff *skb_clone(struct sk_buff *skb, unsigned int __nocast gfp_mask)
{
- struct sk_buff *n = kmem_cache_alloc(skbuff_head_cache, gfp_mask);
-
- if (!n)
- return NULL;
+ struct sk_buff *n;
+
+ n = skb + 1;
+ if (skb->fclone == SKB_FCLONE_ORIG &&
+ n->fclone == SKB_FCLONE_UNAVAILABLE) {
+ atomic_t *fclone_ref = (atomic_t *) (n + 1);
+ n->fclone = SKB_FCLONE_CLONE;
+ atomic_inc(fclone_ref);
+ } else {
+ n = kmem_cache_alloc(skbuff_head_cache, gfp_mask);
+ if (!n)
+ return NULL;
+ n->fclone = SKB_FCLONE_UNAVAILABLE;
+ }
#define C(x) n->x = skb->x
n->next = n->prev = NULL;
- n->list = NULL;
n->sk = NULL;
- C(stamp);
+ C(tstamp);
C(dev);
- C(real_dev);
C(h);
C(nh);
C(mac);
@@ -361,7 +409,6 @@ struct sk_buff *skb_clone(struct sk_buff *skb, unsigned int __nocast gfp_mask)
n->destructor = NULL;
#ifdef CONFIG_NETFILTER
C(nfmark);
- C(nfcache);
C(nfct);
nf_conntrack_get(skb->nfct);
C(nfctinfo);
@@ -370,9 +417,6 @@ struct sk_buff *skb_clone(struct sk_buff *skb, unsigned int __nocast gfp_mask)
nf_bridge_get(skb->nf_bridge);
#endif
#endif /*CONFIG_NETFILTER*/
-#if defined(CONFIG_HIPPI)
- C(private);
-#endif
#ifdef CONFIG_NET_SCHED
C(tc_index);
#ifdef CONFIG_NET_CLS_ACT
@@ -380,7 +424,6 @@ struct sk_buff *skb_clone(struct sk_buff *skb, unsigned int __nocast gfp_mask)
n->tc_verd = CLR_TC_OK2MUNGE(n->tc_verd);
n->tc_verd = CLR_TC_MUNGED(n->tc_verd);
C(input_dev);
- C(tc_classid);
#endif
#endif
@@ -404,10 +447,8 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
*/
unsigned long offset = new->data - old->data;
- new->list = NULL;
new->sk = NULL;
new->dev = old->dev;
- new->real_dev = old->real_dev;
new->priority = old->priority;
new->protocol = old->protocol;
new->dst = dst_clone(old->dst);
@@ -419,12 +460,12 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
new->mac.raw = old->mac.raw + offset;
memcpy(new->cb, old->cb, sizeof(old->cb));
new->local_df = old->local_df;
+ new->fclone = SKB_FCLONE_UNAVAILABLE;
new->pkt_type = old->pkt_type;
- new->stamp = old->stamp;
+ new->tstamp = old->tstamp;
new->destructor = NULL;
#ifdef CONFIG_NETFILTER
new->nfmark = old->nfmark;
- new->nfcache = old->nfcache;
new->nfct = old->nfct;
nf_conntrack_get(old->nfct);
new->nfctinfo = old->nfctinfo;
@@ -1344,50 +1385,43 @@ void skb_queue_tail(struct sk_buff_head *list, struct sk_buff *newsk)
__skb_queue_tail(list, newsk);
spin_unlock_irqrestore(&list->lock, flags);
}
+
/**
* skb_unlink - remove a buffer from a list
* @skb: buffer to remove
+ * @list: list to use
*
- * Place a packet after a given packet in a list. The list locks are taken
- * and this function is atomic with respect to other list locked calls
+ * Remove a packet from a list. The list locks are taken and this
+ * function is atomic with respect to other list locked calls
*
- * Works even without knowing the list it is sitting on, which can be
- * handy at times. It also means that THE LIST MUST EXIST when you
- * unlink. Thus a list must have its contents unlinked before it is
- * destroyed.
+ * You must know what list the SKB is on.
*/
-void skb_unlink(struct sk_buff *skb)
+void skb_unlink(struct sk_buff *skb, struct sk_buff_head *list)
{
- struct sk_buff_head *list = skb->list;
-
- if (list) {
- unsigned long flags;
+ unsigned long flags;
- spin_lock_irqsave(&list->lock, flags);
- if (skb->list == list)
- __skb_unlink(skb, skb->list);
- spin_unlock_irqrestore(&list->lock, flags);
- }
+ spin_lock_irqsave(&list->lock, flags);
+ __skb_unlink(skb, list);
+ spin_unlock_irqrestore(&list->lock, flags);
}
-
/**
* skb_append - append a buffer
* @old: buffer to insert after
* @newsk: buffer to insert
+ * @list: list to use
*
* Place a packet after a given packet in a list. The list locks are taken
* and this function is atomic with respect to other list locked calls.
* A buffer cannot be placed on two lists at the same time.
*/
-
-void skb_append(struct sk_buff *old, struct sk_buff *newsk)
+void skb_append(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list)
{
unsigned long flags;
- spin_lock_irqsave(&old->list->lock, flags);
- __skb_append(old, newsk);
- spin_unlock_irqrestore(&old->list->lock, flags);
+ spin_lock_irqsave(&list->lock, flags);
+ __skb_append(old, newsk, list);
+ spin_unlock_irqrestore(&list->lock, flags);
}
@@ -1395,19 +1429,21 @@ void skb_append(struct sk_buff *old, struct sk_buff *newsk)
* skb_insert - insert a buffer
* @old: buffer to insert before
* @newsk: buffer to insert
+ * @list: list to use
+ *
+ * Place a packet before a given packet in a list. The list locks are
+ * taken and this function is atomic with respect to other list locked
+ * calls.
*
- * Place a packet before a given packet in a list. The list locks are taken
- * and this function is atomic with respect to other list locked calls
* A buffer cannot be placed on two lists at the same time.
*/
-
-void skb_insert(struct sk_buff *old, struct sk_buff *newsk)
+void skb_insert(struct sk_buff *old, struct sk_buff *newsk, struct sk_buff_head *list)
{
unsigned long flags;
- spin_lock_irqsave(&old->list->lock, flags);
- __skb_insert(newsk, old->prev, old, old->list);
- spin_unlock_irqrestore(&old->list->lock, flags);
+ spin_lock_irqsave(&list->lock, flags);
+ __skb_insert(newsk, old->prev, old, list);
+ spin_unlock_irqrestore(&list->lock, flags);
}
#if 0
@@ -1663,12 +1699,23 @@ void __init skb_init(void)
NULL, NULL);
if (!skbuff_head_cache)
panic("cannot create skbuff cache");
+
+ skbuff_fclone_cache = kmem_cache_create("skbuff_fclone_cache",
+ (2*sizeof(struct sk_buff)) +
+ sizeof(atomic_t),
+ 0,
+ SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+ if (!skbuff_fclone_cache)
+ panic("cannot create skbuff cache");
+
+ do_gettimeofday(&skb_tv_base);
}
EXPORT_SYMBOL(___pskb_trim);
EXPORT_SYMBOL(__kfree_skb);
EXPORT_SYMBOL(__pskb_pull_tail);
-EXPORT_SYMBOL(alloc_skb);
+EXPORT_SYMBOL(__alloc_skb);
EXPORT_SYMBOL(pskb_copy);
EXPORT_SYMBOL(pskb_expand_head);
EXPORT_SYMBOL(skb_checksum);
@@ -1696,3 +1743,4 @@ EXPORT_SYMBOL(skb_prepare_seq_read);
EXPORT_SYMBOL(skb_seq_read);
EXPORT_SYMBOL(skb_abort_seq_read);
EXPORT_SYMBOL(skb_find_text);
+EXPORT_SYMBOL(skb_tv_base);
diff --git a/net/core/sock.c b/net/core/sock.c
index 12f6d9a2a522..ccd10fd65682 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -260,7 +260,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
if (val > sysctl_wmem_max)
val = sysctl_wmem_max;
-
+set_sndbuf:
sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
if ((val * 2) < SOCK_MIN_SNDBUF)
sk->sk_sndbuf = SOCK_MIN_SNDBUF;
@@ -274,6 +274,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
sk->sk_write_space(sk);
break;
+ case SO_SNDBUFFORCE:
+ if (!capable(CAP_NET_ADMIN)) {
+ ret = -EPERM;
+ break;
+ }
+ goto set_sndbuf;
+
case SO_RCVBUF:
/* Don't error on this BSD doesn't and if you think
about it this is right. Otherwise apps have to
@@ -282,7 +289,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
if (val > sysctl_rmem_max)
val = sysctl_rmem_max;
-
+set_rcvbuf:
sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
/* FIXME: is this lower bound the right one? */
if ((val * 2) < SOCK_MIN_RCVBUF)
@@ -291,6 +298,13 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
sk->sk_rcvbuf = val * 2;
break;
+ case SO_RCVBUFFORCE:
+ if (!capable(CAP_NET_ADMIN)) {
+ ret = -EPERM;
+ break;
+ }
+ goto set_rcvbuf;
+
case SO_KEEPALIVE:
#ifdef CONFIG_INET
if (sk->sk_protocol == IPPROTO_TCP)
@@ -686,6 +700,80 @@ void sk_free(struct sock *sk)
module_put(owner);
}
+struct sock *sk_clone(const struct sock *sk, const unsigned int __nocast priority)
+{
+ struct sock *newsk = sk_alloc(sk->sk_family, priority, sk->sk_prot, 0);
+
+ if (newsk != NULL) {
+ struct sk_filter *filter;
+
+ memcpy(newsk, sk, sk->sk_prot->obj_size);
+
+ /* SANITY */
+ sk_node_init(&newsk->sk_node);
+ sock_lock_init(newsk);
+ bh_lock_sock(newsk);
+
+ atomic_set(&newsk->sk_rmem_alloc, 0);
+ atomic_set(&newsk->sk_wmem_alloc, 0);
+ atomic_set(&newsk->sk_omem_alloc, 0);
+ skb_queue_head_init(&newsk->sk_receive_queue);
+ skb_queue_head_init(&newsk->sk_write_queue);
+
+ rwlock_init(&newsk->sk_dst_lock);
+ rwlock_init(&newsk->sk_callback_lock);
+
+ newsk->sk_dst_cache = NULL;
+ newsk->sk_wmem_queued = 0;
+ newsk->sk_forward_alloc = 0;
+ newsk->sk_send_head = NULL;
+ newsk->sk_backlog.head = newsk->sk_backlog.tail = NULL;
+ newsk->sk_userlocks = sk->sk_userlocks & ~SOCK_BINDPORT_LOCK;
+
+ sock_reset_flag(newsk, SOCK_DONE);
+ skb_queue_head_init(&newsk->sk_error_queue);
+
+ filter = newsk->sk_filter;
+ if (filter != NULL)
+ sk_filter_charge(newsk, filter);
+
+ if (unlikely(xfrm_sk_clone_policy(newsk))) {
+ /* It is still raw copy of parent, so invalidate
+ * destructor and make plain sk_free() */
+ newsk->sk_destruct = NULL;
+ sk_free(newsk);
+ newsk = NULL;
+ goto out;
+ }
+
+ newsk->sk_err = 0;
+ newsk->sk_priority = 0;
+ atomic_set(&newsk->sk_refcnt, 2);
+
+ /*
+ * Increment the counter in the same struct proto as the master
+ * sock (sk_refcnt_debug_inc uses newsk->sk_prot->socks, that
+ * is the same as sk->sk_prot->socks, as this field was copied
+ * with memcpy).
+ *
+ * This _changes_ the previous behaviour, where
+ * tcp_create_openreq_child always was incrementing the
+ * equivalent to tcp_prot->socks (inet_sock_nr), so this have
+ * to be taken into account in all callers. -acme
+ */
+ sk_refcnt_debug_inc(newsk);
+ newsk->sk_socket = NULL;
+ newsk->sk_sleep = NULL;
+
+ if (newsk->sk_prot->sockets_allocated)
+ atomic_inc(newsk->sk_prot->sockets_allocated);
+ }
+out:
+ return newsk;
+}
+
+EXPORT_SYMBOL_GPL(sk_clone);
+
void __init sk_init(void)
{
if (num_physpages <= 4096) {
@@ -1353,11 +1441,7 @@ void sk_common_release(struct sock *sk)
xfrm_sk_free_policy(sk);
-#ifdef INET_REFCNT_DEBUG
- if (atomic_read(&sk->sk_refcnt) != 1)
- printk(KERN_DEBUG "Destruction of the socket %p delayed, c=%d\n",
- sk, atomic_read(&sk->sk_refcnt));
-#endif
+ sk_refcnt_debug_release(sk);
sock_put(sk);
}
@@ -1368,7 +1452,8 @@ static LIST_HEAD(proto_list);
int proto_register(struct proto *prot, int alloc_slab)
{
- char *request_sock_slab_name;
+ char *request_sock_slab_name = NULL;
+ char *timewait_sock_slab_name;
int rc = -ENOBUFS;
if (alloc_slab) {
@@ -1399,6 +1484,23 @@ int proto_register(struct proto *prot, int alloc_slab)
goto out_free_request_sock_slab_name;
}
}
+
+ if (prot->twsk_obj_size) {
+ static const char mask[] = "tw_sock_%s";
+
+ timewait_sock_slab_name = kmalloc(strlen(prot->name) + sizeof(mask) - 1, GFP_KERNEL);
+
+ if (timewait_sock_slab_name == NULL)
+ goto out_free_request_sock_slab;
+
+ sprintf(timewait_sock_slab_name, mask, prot->name);
+ prot->twsk_slab = kmem_cache_create(timewait_sock_slab_name,
+ prot->twsk_obj_size,
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+ if (prot->twsk_slab == NULL)
+ goto out_free_timewait_sock_slab_name;
+ }
}
write_lock(&proto_list_lock);
@@ -1407,6 +1509,13 @@ int proto_register(struct proto *prot, int alloc_slab)
rc = 0;
out:
return rc;
+out_free_timewait_sock_slab_name:
+ kfree(timewait_sock_slab_name);
+out_free_request_sock_slab:
+ if (prot->rsk_prot && prot->rsk_prot->slab) {
+ kmem_cache_destroy(prot->rsk_prot->slab);
+ prot->rsk_prot->slab = NULL;
+ }
out_free_request_sock_slab_name:
kfree(request_sock_slab_name);
out_free_sock_slab:
@@ -1434,6 +1543,14 @@ void proto_unregister(struct proto *prot)
prot->rsk_prot->slab = NULL;
}
+ if (prot->twsk_slab != NULL) {
+ const char *name = kmem_cache_name(prot->twsk_slab);
+
+ kmem_cache_destroy(prot->twsk_slab);
+ kfree(name);
+ prot->twsk_slab = NULL;
+ }
+
list_del(&prot->node);
write_unlock(&proto_list_lock);
}
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 8f817ad9f546..2f278c8e4743 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -9,23 +9,18 @@
#include <linux/sysctl.h>
#include <linux/config.h>
#include <linux/module.h>
+#include <linux/socket.h>
+#include <net/sock.h>
#ifdef CONFIG_SYSCTL
extern int netdev_max_backlog;
-extern int netdev_budget;
extern int weight_p;
-extern int net_msg_cost;
-extern int net_msg_burst;
extern __u32 sysctl_wmem_max;
extern __u32 sysctl_rmem_max;
-extern __u32 sysctl_wmem_default;
-extern __u32 sysctl_rmem_default;
extern int sysctl_core_destroy_delay;
-extern int sysctl_optmem_max;
-extern int sysctl_somaxconn;
#ifdef CONFIG_NET_DIVERT
extern char sysctl_divert_version[];
diff --git a/net/core/utils.c b/net/core/utils.c
index 88eb8b68e26b..7b5970fc9e40 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -16,7 +16,9 @@
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
+#include <linux/inet.h>
#include <linux/mm.h>
+#include <linux/net.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/random.h>
diff --git a/net/core/wireless.c b/net/core/wireless.c
index 3ff5639c0b78..5caae2399f3a 100644
--- a/net/core/wireless.c
+++ b/net/core/wireless.c
@@ -571,10 +571,6 @@ static int wireless_seq_show(struct seq_file *seq, void *v)
return 0;
}
-extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
-extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
-extern void dev_seq_stop(struct seq_file *seq, void *v);
-
static struct seq_operations wireless_seq_ops = {
.start = dev_seq_start,
.next = dev_seq_next,
@@ -1144,8 +1140,8 @@ static inline void rtmsg_iwinfo(struct net_device * dev,
kfree_skb(skb);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = RTNLGRP_LINK;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_LINK, GFP_ATOMIC);
}
#endif /* WE_EVENT_NETLINK */
diff --git a/net/dccp/Kconfig b/net/dccp/Kconfig
new file mode 100644
index 000000000000..187ac182e24b
--- /dev/null
+++ b/net/dccp/Kconfig
@@ -0,0 +1,50 @@
+menu "DCCP Configuration (EXPERIMENTAL)"
+ depends on INET && EXPERIMENTAL
+
+config IP_DCCP
+ tristate "The DCCP Protocol (EXPERIMENTAL)"
+ ---help---
+ Datagram Congestion Control Protocol
+
+ From draft-ietf-dccp-spec-11 <http://www.icir.org/kohler/dcp/draft-ietf-dccp-spec-11.txt>.
+
+ The Datagram Congestion Control Protocol (DCCP) is a transport
+ protocol that implements bidirectional, unicast connections of
+ congestion-controlled, unreliable datagrams. It should be suitable
+ for use by applications such as streaming media, Internet telephony,
+ and on-line games
+
+ To compile this protocol support as a module, choose M here: the
+ module will be called dccp.
+
+ If in doubt, say N.
+
+config INET_DCCP_DIAG
+ depends on IP_DCCP && INET_DIAG
+ def_tristate y if (IP_DCCP = y && INET_DIAG = y)
+ def_tristate m
+
+source "net/dccp/ccids/Kconfig"
+
+menu "DCCP Kernel Hacking"
+ depends on IP_DCCP && DEBUG_KERNEL=y
+
+config IP_DCCP_DEBUG
+ bool "DCCP debug messages"
+ ---help---
+ Only use this if you're hacking DCCP.
+
+ Just say N.
+
+config IP_DCCP_UNLOAD_HACK
+ depends on IP_DCCP=m && IP_DCCP_CCID3=m
+ bool "DCCP control sock unload hack"
+ ---help---
+ Enable this to be able to unload the dccp module when the it
+ has only one refcount held, the control sock one. Just execute
+ "rmmod dccp_ccid3 dccp"
+
+ Just say N.
+endmenu
+
+endmenu
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
new file mode 100644
index 000000000000..fb97bb042455
--- /dev/null
+++ b/net/dccp/Makefile
@@ -0,0 +1,10 @@
+obj-$(CONFIG_IP_DCCP) += dccp.o
+
+dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \
+ timer.o
+
+obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
+
+dccp_diag-y := diag.o
+
+obj-y += ccids/
diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
new file mode 100644
index 000000000000..9d8fc0e289ea
--- /dev/null
+++ b/net/dccp/ccid.c
@@ -0,0 +1,139 @@
+/*
+ * net/dccp/ccid.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * CCID infrastructure
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "ccid.h"
+
+static struct ccid *ccids[CCID_MAX];
+#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
+static atomic_t ccids_lockct = ATOMIC_INIT(0);
+static DEFINE_SPINLOCK(ccids_lock);
+
+/*
+ * The strategy is: modifications ccids vector are short, do not sleep and
+ * veeery rare, but read access should be free of any exclusive locks.
+ */
+static void ccids_write_lock(void)
+{
+ spin_lock(&ccids_lock);
+ while (atomic_read(&ccids_lockct) != 0) {
+ spin_unlock(&ccids_lock);
+ yield();
+ spin_lock(&ccids_lock);
+ }
+}
+
+static inline void ccids_write_unlock(void)
+{
+ spin_unlock(&ccids_lock);
+}
+
+static inline void ccids_read_lock(void)
+{
+ atomic_inc(&ccids_lockct);
+ spin_unlock_wait(&ccids_lock);
+}
+
+static inline void ccids_read_unlock(void)
+{
+ atomic_dec(&ccids_lockct);
+}
+
+#else
+#define ccids_write_lock() do { } while(0)
+#define ccids_write_unlock() do { } while(0)
+#define ccids_read_lock() do { } while(0)
+#define ccids_read_unlock() do { } while(0)
+#endif
+
+int ccid_register(struct ccid *ccid)
+{
+ int err;
+
+ if (ccid->ccid_init == NULL)
+ return -1;
+
+ ccids_write_lock();
+ err = -EEXIST;
+ if (ccids[ccid->ccid_id] == NULL) {
+ ccids[ccid->ccid_id] = ccid;
+ err = 0;
+ }
+ ccids_write_unlock();
+ if (err == 0)
+ pr_info("CCID: Registered CCID %d (%s)\n",
+ ccid->ccid_id, ccid->ccid_name);
+ return err;
+}
+
+EXPORT_SYMBOL_GPL(ccid_register);
+
+int ccid_unregister(struct ccid *ccid)
+{
+ ccids_write_lock();
+ ccids[ccid->ccid_id] = NULL;
+ ccids_write_unlock();
+ pr_info("CCID: Unregistered CCID %d (%s)\n",
+ ccid->ccid_id, ccid->ccid_name);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(ccid_unregister);
+
+struct ccid *ccid_init(unsigned char id, struct sock *sk)
+{
+ struct ccid *ccid;
+
+#ifdef CONFIG_KMOD
+ if (ccids[id] == NULL)
+ request_module("net-dccp-ccid-%d", id);
+#endif
+ ccids_read_lock();
+
+ ccid = ccids[id];
+ if (ccid == NULL)
+ goto out;
+
+ if (!try_module_get(ccid->ccid_owner))
+ goto out_err;
+
+ if (ccid->ccid_init(sk) != 0)
+ goto out_module_put;
+out:
+ ccids_read_unlock();
+ return ccid;
+out_module_put:
+ module_put(ccid->ccid_owner);
+out_err:
+ ccid = NULL;
+ goto out;
+}
+
+EXPORT_SYMBOL_GPL(ccid_init);
+
+void ccid_exit(struct ccid *ccid, struct sock *sk)
+{
+ if (ccid == NULL)
+ return;
+
+ ccids_read_lock();
+
+ if (ccids[ccid->ccid_id] != NULL) {
+ if (ccid->ccid_exit != NULL)
+ ccid->ccid_exit(sk);
+ module_put(ccid->ccid_owner);
+ }
+
+ ccids_read_unlock();
+}
+
+EXPORT_SYMBOL_GPL(ccid_exit);
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
new file mode 100644
index 000000000000..962f1e9e2f7e
--- /dev/null
+++ b/net/dccp/ccid.h
@@ -0,0 +1,180 @@
+#ifndef _CCID_H
+#define _CCID_H
+/*
+ * net/dccp/ccid.h
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * CCID infrastructure
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <net/sock.h>
+#include <linux/dccp.h>
+#include <linux/list.h>
+#include <linux/module.h>
+
+#define CCID_MAX 255
+
+struct ccid {
+ unsigned char ccid_id;
+ const char *ccid_name;
+ struct module *ccid_owner;
+ int (*ccid_init)(struct sock *sk);
+ void (*ccid_exit)(struct sock *sk);
+ int (*ccid_hc_rx_init)(struct sock *sk);
+ int (*ccid_hc_tx_init)(struct sock *sk);
+ void (*ccid_hc_rx_exit)(struct sock *sk);
+ void (*ccid_hc_tx_exit)(struct sock *sk);
+ void (*ccid_hc_rx_packet_recv)(struct sock *sk,
+ struct sk_buff *skb);
+ int (*ccid_hc_rx_parse_options)(struct sock *sk,
+ unsigned char option,
+ unsigned char len, u16 idx,
+ unsigned char* value);
+ void (*ccid_hc_rx_insert_options)(struct sock *sk,
+ struct sk_buff *skb);
+ void (*ccid_hc_tx_insert_options)(struct sock *sk,
+ struct sk_buff *skb);
+ void (*ccid_hc_tx_packet_recv)(struct sock *sk,
+ struct sk_buff *skb);
+ int (*ccid_hc_tx_parse_options)(struct sock *sk,
+ unsigned char option,
+ unsigned char len, u16 idx,
+ unsigned char* value);
+ int (*ccid_hc_tx_send_packet)(struct sock *sk,
+ struct sk_buff *skb, int len);
+ void (*ccid_hc_tx_packet_sent)(struct sock *sk, int more,
+ int len);
+ void (*ccid_hc_rx_get_info)(struct sock *sk,
+ struct tcp_info *info);
+ void (*ccid_hc_tx_get_info)(struct sock *sk,
+ struct tcp_info *info);
+};
+
+extern int ccid_register(struct ccid *ccid);
+extern int ccid_unregister(struct ccid *ccid);
+
+extern struct ccid *ccid_init(unsigned char id, struct sock *sk);
+extern void ccid_exit(struct ccid *ccid, struct sock *sk);
+
+static inline void __ccid_get(struct ccid *ccid)
+{
+ __module_get(ccid->ccid_owner);
+}
+
+static inline int ccid_hc_tx_send_packet(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb, int len)
+{
+ int rc = 0;
+ if (ccid->ccid_hc_tx_send_packet != NULL)
+ rc = ccid->ccid_hc_tx_send_packet(sk, skb, len);
+ return rc;
+}
+
+static inline void ccid_hc_tx_packet_sent(struct ccid *ccid, struct sock *sk,
+ int more, int len)
+{
+ if (ccid->ccid_hc_tx_packet_sent != NULL)
+ ccid->ccid_hc_tx_packet_sent(sk, more, len);
+}
+
+static inline int ccid_hc_rx_init(struct ccid *ccid, struct sock *sk)
+{
+ int rc = 0;
+ if (ccid->ccid_hc_rx_init != NULL)
+ rc = ccid->ccid_hc_rx_init(sk);
+ return rc;
+}
+
+static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
+{
+ int rc = 0;
+ if (ccid->ccid_hc_tx_init != NULL)
+ rc = ccid->ccid_hc_tx_init(sk);
+ return rc;
+}
+
+static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
+{
+ if (ccid->ccid_hc_rx_exit != NULL &&
+ dccp_sk(sk)->dccps_hc_rx_ccid_private != NULL)
+ ccid->ccid_hc_rx_exit(sk);
+}
+
+static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
+{
+ if (ccid->ccid_hc_tx_exit != NULL &&
+ dccp_sk(sk)->dccps_hc_tx_ccid_private != NULL)
+ ccid->ccid_hc_tx_exit(sk);
+}
+
+static inline void ccid_hc_rx_packet_recv(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb)
+{
+ if (ccid->ccid_hc_rx_packet_recv != NULL)
+ ccid->ccid_hc_rx_packet_recv(sk, skb);
+}
+
+static inline void ccid_hc_tx_packet_recv(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb)
+{
+ if (ccid->ccid_hc_tx_packet_recv != NULL)
+ ccid->ccid_hc_tx_packet_recv(sk, skb);
+}
+
+static inline int ccid_hc_tx_parse_options(struct ccid *ccid, struct sock *sk,
+ unsigned char option,
+ unsigned char len, u16 idx,
+ unsigned char* value)
+{
+ int rc = 0;
+ if (ccid->ccid_hc_tx_parse_options != NULL)
+ rc = ccid->ccid_hc_tx_parse_options(sk, option, len, idx,
+ value);
+ return rc;
+}
+
+static inline int ccid_hc_rx_parse_options(struct ccid *ccid, struct sock *sk,
+ unsigned char option,
+ unsigned char len, u16 idx,
+ unsigned char* value)
+{
+ int rc = 0;
+ if (ccid->ccid_hc_rx_parse_options != NULL)
+ rc = ccid->ccid_hc_rx_parse_options(sk, option, len, idx, value);
+ return rc;
+}
+
+static inline void ccid_hc_tx_insert_options(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb)
+{
+ if (ccid->ccid_hc_tx_insert_options != NULL)
+ ccid->ccid_hc_tx_insert_options(sk, skb);
+}
+
+static inline void ccid_hc_rx_insert_options(struct ccid *ccid, struct sock *sk,
+ struct sk_buff *skb)
+{
+ if (ccid->ccid_hc_rx_insert_options != NULL)
+ ccid->ccid_hc_rx_insert_options(sk, skb);
+}
+
+static inline void ccid_hc_rx_get_info(struct ccid *ccid, struct sock *sk,
+ struct tcp_info *info)
+{
+ if (ccid->ccid_hc_rx_get_info != NULL)
+ ccid->ccid_hc_rx_get_info(sk, info);
+}
+
+static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
+ struct tcp_info *info)
+{
+ if (ccid->ccid_hc_tx_get_info != NULL)
+ ccid->ccid_hc_tx_get_info(sk, info);
+}
+#endif /* _CCID_H */
diff --git a/net/dccp/ccids/Kconfig b/net/dccp/ccids/Kconfig
new file mode 100644
index 000000000000..7684d83946a4
--- /dev/null
+++ b/net/dccp/ccids/Kconfig
@@ -0,0 +1,29 @@
+menu "DCCP CCIDs Configuration (EXPERIMENTAL)"
+ depends on IP_DCCP && EXPERIMENTAL
+
+config IP_DCCP_CCID3
+ tristate "CCID3 (TFRC) (EXPERIMENTAL)"
+ depends on IP_DCCP
+ ---help---
+ CCID 3 denotes TCP-Friendly Rate Control (TFRC), an equation-based
+ rate-controlled congestion control mechanism. TFRC is designed to
+ be reasonably fair when competing for bandwidth with TCP-like flows,
+ where a flow is "reasonably fair" if its sending rate is generally
+ within a factor of two of the sending rate of a TCP flow under the
+ same conditions. However, TFRC has a much lower variation of
+ throughput over time compared with TCP, which makes CCID 3 more
+ suitable than CCID 2 for applications such streaming media where a
+ relatively smooth sending rate is of importance.
+
+ CCID 3 is further described in [CCID 3 PROFILE]. The TFRC
+ congestion control algorithms were initially described in RFC 3448.
+
+ This text was extracted from draft-ietf-dccp-spec-11.txt.
+
+ If in doubt, say M.
+
+config IP_DCCP_TFRC_LIB
+ depends on IP_DCCP_CCID3
+ def_tristate IP_DCCP_CCID3
+
+endmenu
diff --git a/net/dccp/ccids/Makefile b/net/dccp/ccids/Makefile
new file mode 100644
index 000000000000..956f79f50743
--- /dev/null
+++ b/net/dccp/ccids/Makefile
@@ -0,0 +1,5 @@
+obj-$(CONFIG_IP_DCCP_CCID3) += dccp_ccid3.o
+
+dccp_ccid3-y := ccid3.o
+
+obj-y += lib/
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
new file mode 100644
index 000000000000..7bf3b3a91e97
--- /dev/null
+++ b/net/dccp/ccids/ccid3.c
@@ -0,0 +1,1221 @@
+/*
+ * net/dccp/ccids/ccid3.c
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ *
+ * An implementation of the DCCP protocol
+ *
+ * This code has been developed by the University of Waikato WAND
+ * research group. For further information please see http://www.wand.net.nz/
+ *
+ * This code also uses code from Lulea University, rereleased as GPL by its
+ * authors:
+ * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ * Changes to meet Linux coding standards, to make it meet latest ccid3 draft
+ * and to make it work as a loadable module in the DCCP stack written by
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>.
+ *
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include "../ccid.h"
+#include "../dccp.h"
+#include "lib/packet_history.h"
+#include "lib/loss_interval.h"
+#include "lib/tfrc.h"
+#include "ccid3.h"
+
+/*
+ * Reason for maths with 10 here is to avoid 32 bit overflow when a is big.
+ */
+static inline u32 usecs_div(const u32 a, const u32 b)
+{
+ const u32 tmp = a * (USEC_PER_SEC / 10);
+ return b > 20 ? tmp / (b / 10) : tmp;
+}
+
+static int ccid3_debug;
+
+#ifdef CCID3_DEBUG
+#define ccid3_pr_debug(format, a...) \
+ do { if (ccid3_debug) \
+ printk(KERN_DEBUG "%s: " format, __FUNCTION__, ##a); \
+ } while (0)
+#else
+#define ccid3_pr_debug(format, a...)
+#endif
+
+static struct dccp_tx_hist *ccid3_tx_hist;
+static struct dccp_rx_hist *ccid3_rx_hist;
+static struct dccp_li_hist *ccid3_li_hist;
+
+static int ccid3_init(struct sock *sk)
+{
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+ return 0;
+}
+
+static void ccid3_exit(struct sock *sk)
+{
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+}
+
+/* TFRC sender states */
+enum ccid3_hc_tx_states {
+ TFRC_SSTATE_NO_SENT = 1,
+ TFRC_SSTATE_NO_FBACK,
+ TFRC_SSTATE_FBACK,
+ TFRC_SSTATE_TERM,
+};
+
+#ifdef CCID3_DEBUG
+static const char *ccid3_tx_state_name(enum ccid3_hc_tx_states state)
+{
+ static char *ccid3_state_names[] = {
+ [TFRC_SSTATE_NO_SENT] = "NO_SENT",
+ [TFRC_SSTATE_NO_FBACK] = "NO_FBACK",
+ [TFRC_SSTATE_FBACK] = "FBACK",
+ [TFRC_SSTATE_TERM] = "TERM",
+ };
+
+ return ccid3_state_names[state];
+}
+#endif
+
+static inline void ccid3_hc_tx_set_state(struct sock *sk,
+ enum ccid3_hc_tx_states state)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+ enum ccid3_hc_tx_states oldstate = hctx->ccid3hctx_state;
+
+ ccid3_pr_debug("%s(%p) %-8.8s -> %s\n",
+ dccp_role(sk), sk, ccid3_tx_state_name(oldstate),
+ ccid3_tx_state_name(state));
+ WARN_ON(state == oldstate);
+ hctx->ccid3hctx_state = state;
+}
+
+/* Calculate new t_ipi (inter packet interval) by t_ipi = s / X_inst */
+static inline void ccid3_calc_new_t_ipi(struct ccid3_hc_tx_sock *hctx)
+{
+ /*
+ * If no feedback spec says t_ipi is 1 second (set elsewhere and then
+ * doubles after every no feedback timer (separate function)
+ */
+ if (hctx->ccid3hctx_state != TFRC_SSTATE_NO_FBACK)
+ hctx->ccid3hctx_t_ipi = usecs_div(hctx->ccid3hctx_s,
+ hctx->ccid3hctx_x);
+}
+
+/* Calculate new delta by delta = min(t_ipi / 2, t_gran / 2) */
+static inline void ccid3_calc_new_delta(struct ccid3_hc_tx_sock *hctx)
+{
+ hctx->ccid3hctx_delta = min_t(u32, hctx->ccid3hctx_t_ipi / 2,
+ TFRC_OPSYS_HALF_TIME_GRAN);
+}
+
+/*
+ * Update X by
+ * If (p > 0)
+ * x_calc = calcX(s, R, p);
+ * X = max(min(X_calc, 2 * X_recv), s / t_mbi);
+ * Else
+ * If (now - tld >= R)
+ * X = max(min(2 * X, 2 * X_recv), s / R);
+ * tld = now;
+ */
+static void ccid3_hc_tx_update_x(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+
+ /* To avoid large error in calcX */
+ if (hctx->ccid3hctx_p >= TFRC_SMALLEST_P) {
+ hctx->ccid3hctx_x_calc = tfrc_calc_x(hctx->ccid3hctx_s,
+ hctx->ccid3hctx_rtt,
+ hctx->ccid3hctx_p);
+ hctx->ccid3hctx_x = max_t(u32, min_t(u32, hctx->ccid3hctx_x_calc,
+ 2 * hctx->ccid3hctx_x_recv),
+ (hctx->ccid3hctx_s /
+ TFRC_MAX_BACK_OFF_TIME));
+ } else {
+ struct timeval now;
+
+ do_gettimeofday(&now);
+ if (timeval_delta(&now, &hctx->ccid3hctx_t_ld) >=
+ hctx->ccid3hctx_rtt) {
+ hctx->ccid3hctx_x = max_t(u32, min_t(u32, hctx->ccid3hctx_x_recv,
+ hctx->ccid3hctx_x) * 2,
+ usecs_div(hctx->ccid3hctx_s,
+ hctx->ccid3hctx_rtt));
+ hctx->ccid3hctx_t_ld = now;
+ }
+ }
+}
+
+static void ccid3_hc_tx_no_feedback_timer(unsigned long data)
+{
+ struct sock *sk = (struct sock *)data;
+ struct dccp_sock *dp = dccp_sk(sk);
+ unsigned long next_tmout = 0;
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+
+ bh_lock_sock(sk);
+ if (sock_owned_by_user(sk)) {
+ /* Try again later. */
+ /* XXX: set some sensible MIB */
+ sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
+ jiffies + HZ / 5);
+ goto out;
+ }
+
+ ccid3_pr_debug("%s, sk=%p, state=%s\n", dccp_role(sk), sk,
+ ccid3_tx_state_name(hctx->ccid3hctx_state));
+
+ switch (hctx->ccid3hctx_state) {
+ case TFRC_SSTATE_TERM:
+ goto out;
+ case TFRC_SSTATE_NO_FBACK:
+ /* Halve send rate */
+ hctx->ccid3hctx_x /= 2;
+ if (hctx->ccid3hctx_x < (hctx->ccid3hctx_s /
+ TFRC_MAX_BACK_OFF_TIME))
+ hctx->ccid3hctx_x = (hctx->ccid3hctx_s /
+ TFRC_MAX_BACK_OFF_TIME);
+
+ ccid3_pr_debug("%s, sk=%p, state=%s, updated tx rate to %d "
+ "bytes/s\n",
+ dccp_role(sk), sk,
+ ccid3_tx_state_name(hctx->ccid3hctx_state),
+ hctx->ccid3hctx_x);
+ next_tmout = max_t(u32, 2 * usecs_div(hctx->ccid3hctx_s,
+ hctx->ccid3hctx_x),
+ TFRC_INITIAL_TIMEOUT);
+ /*
+ * FIXME - not sure above calculation is correct. See section
+ * 5 of CCID3 11 should adjust tx_t_ipi and double that to
+ * achieve it really
+ */
+ break;
+ case TFRC_SSTATE_FBACK:
+ /*
+ * Check if IDLE since last timeout and recv rate is less than
+ * 4 packets per RTT
+ */
+ if (!hctx->ccid3hctx_idle ||
+ (hctx->ccid3hctx_x_recv >=
+ 4 * usecs_div(hctx->ccid3hctx_s, hctx->ccid3hctx_rtt))) {
+ ccid3_pr_debug("%s, sk=%p, state=%s, not idle\n",
+ dccp_role(sk), sk,
+ ccid3_tx_state_name(hctx->ccid3hctx_state));
+ /* Halve sending rate */
+
+ /* If (X_calc > 2 * X_recv)
+ * X_recv = max(X_recv / 2, s / (2 * t_mbi));
+ * Else
+ * X_recv = X_calc / 4;
+ */
+ BUG_ON(hctx->ccid3hctx_p >= TFRC_SMALLEST_P &&
+ hctx->ccid3hctx_x_calc == 0);
+
+ /* check also if p is zero -> x_calc is infinity? */
+ if (hctx->ccid3hctx_p < TFRC_SMALLEST_P ||
+ hctx->ccid3hctx_x_calc > 2 * hctx->ccid3hctx_x_recv)
+ hctx->ccid3hctx_x_recv = max_t(u32, hctx->ccid3hctx_x_recv / 2,
+ hctx->ccid3hctx_s / (2 * TFRC_MAX_BACK_OFF_TIME));
+ else
+ hctx->ccid3hctx_x_recv = hctx->ccid3hctx_x_calc / 4;
+
+ /* Update sending rate */
+ ccid3_hc_tx_update_x(sk);
+ }
+ /*
+ * Schedule no feedback timer to expire in
+ * max(4 * R, 2 * s / X)
+ */
+ next_tmout = max_t(u32, hctx->ccid3hctx_t_rto,
+ 2 * usecs_div(hctx->ccid3hctx_s,
+ hctx->ccid3hctx_x));
+ break;
+ default:
+ printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
+ __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
+ dump_stack();
+ goto out;
+ }
+
+ sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
+ jiffies + max_t(u32, 1, usecs_to_jiffies(next_tmout)));
+ hctx->ccid3hctx_idle = 1;
+out:
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
+
+static int ccid3_hc_tx_send_packet(struct sock *sk,
+ struct sk_buff *skb, int len)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+ struct dccp_tx_hist_entry *new_packet;
+ struct timeval now;
+ long delay;
+ int rc = -ENOTCONN;
+
+ /* Check if pure ACK or Terminating*/
+
+ /*
+ * XXX: We only call this function for DATA and DATAACK, on, these
+ * packets can have zero length, but why the comment about "pure ACK"?
+ */
+ if (hctx == NULL || len == 0 ||
+ hctx->ccid3hctx_state == TFRC_SSTATE_TERM)
+ goto out;
+
+ /* See if last packet allocated was not sent */
+ new_packet = dccp_tx_hist_head(&hctx->ccid3hctx_hist);
+ if (new_packet == NULL || new_packet->dccphtx_sent) {
+ new_packet = dccp_tx_hist_entry_new(ccid3_tx_hist,
+ SLAB_ATOMIC);
+
+ rc = -ENOBUFS;
+ if (new_packet == NULL) {
+ ccid3_pr_debug("%s, sk=%p, not enough mem to add "
+ "to history, send refused\n",
+ dccp_role(sk), sk);
+ goto out;
+ }
+
+ dccp_tx_hist_add_entry(&hctx->ccid3hctx_hist, new_packet);
+ }
+
+ do_gettimeofday(&now);
+
+ switch (hctx->ccid3hctx_state) {
+ case TFRC_SSTATE_NO_SENT:
+ ccid3_pr_debug("%s, sk=%p, first packet(%llu)\n",
+ dccp_role(sk), sk, dp->dccps_gss);
+
+ hctx->ccid3hctx_no_feedback_timer.function = ccid3_hc_tx_no_feedback_timer;
+ hctx->ccid3hctx_no_feedback_timer.data = (unsigned long)sk;
+ sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
+ jiffies + usecs_to_jiffies(TFRC_INITIAL_TIMEOUT));
+ hctx->ccid3hctx_last_win_count = 0;
+ hctx->ccid3hctx_t_last_win_count = now;
+ ccid3_hc_tx_set_state(sk, TFRC_SSTATE_NO_FBACK);
+ hctx->ccid3hctx_t_ipi = TFRC_INITIAL_TIMEOUT;
+
+ /* Set nominal send time for initial packet */
+ hctx->ccid3hctx_t_nom = now;
+ timeval_add_usecs(&hctx->ccid3hctx_t_nom,
+ hctx->ccid3hctx_t_ipi);
+ ccid3_calc_new_delta(hctx);
+ rc = 0;
+ break;
+ case TFRC_SSTATE_NO_FBACK:
+ case TFRC_SSTATE_FBACK:
+ delay = (timeval_delta(&now, &hctx->ccid3hctx_t_nom) -
+ hctx->ccid3hctx_delta);
+ ccid3_pr_debug("send_packet delay=%ld\n", delay);
+ delay /= -1000;
+ /* divide by -1000 is to convert to ms and get sign right */
+ rc = delay > 0 ? delay : 0;
+ break;
+ default:
+ printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
+ __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
+ dump_stack();
+ rc = -EINVAL;
+ break;
+ }
+
+ /* Can we send? if so add options and add to packet history */
+ if (rc == 0)
+ new_packet->dccphtx_ccval =
+ DCCP_SKB_CB(skb)->dccpd_ccval =
+ hctx->ccid3hctx_last_win_count;
+out:
+ return rc;
+}
+
+static void ccid3_hc_tx_packet_sent(struct sock *sk, int more, int len)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+ struct timeval now;
+
+ BUG_ON(hctx == NULL);
+
+ if (hctx->ccid3hctx_state == TFRC_SSTATE_TERM) {
+ ccid3_pr_debug("%s, sk=%p, while state is TFRC_SSTATE_TERM!\n",
+ dccp_role(sk), sk);
+ return;
+ }
+
+ do_gettimeofday(&now);
+
+ /* check if we have sent a data packet */
+ if (len > 0) {
+ unsigned long quarter_rtt;
+ struct dccp_tx_hist_entry *packet;
+
+ packet = dccp_tx_hist_head(&hctx->ccid3hctx_hist);
+ if (packet == NULL) {
+ printk(KERN_CRIT "%s: packet doesn't exists in "
+ "history!\n", __FUNCTION__);
+ return;
+ }
+ if (packet->dccphtx_sent) {
+ printk(KERN_CRIT "%s: no unsent packet in history!\n",
+ __FUNCTION__);
+ return;
+ }
+ packet->dccphtx_tstamp = now;
+ packet->dccphtx_seqno = dp->dccps_gss;
+ /*
+ * Check if win_count have changed
+ * Algorithm in "8.1. Window Counter Valuer" in
+ * draft-ietf-dccp-ccid3-11.txt
+ */
+ quarter_rtt = timeval_delta(&now, &hctx->ccid3hctx_t_last_win_count);
+ if (likely(hctx->ccid3hctx_rtt > 8))
+ quarter_rtt /= hctx->ccid3hctx_rtt / 4;
+
+ if (quarter_rtt > 0) {
+ hctx->ccid3hctx_t_last_win_count = now;
+ hctx->ccid3hctx_last_win_count = (hctx->ccid3hctx_last_win_count +
+ min_t(unsigned long, quarter_rtt, 5)) % 16;
+ ccid3_pr_debug("%s, sk=%p, window changed from "
+ "%u to %u!\n",
+ dccp_role(sk), sk,
+ packet->dccphtx_ccval,
+ hctx->ccid3hctx_last_win_count);
+ }
+
+ hctx->ccid3hctx_idle = 0;
+ packet->dccphtx_rtt = hctx->ccid3hctx_rtt;
+ packet->dccphtx_sent = 1;
+ } else
+ ccid3_pr_debug("%s, sk=%p, seqno=%llu NOT inserted!\n",
+ dccp_role(sk), sk, dp->dccps_gss);
+
+ switch (hctx->ccid3hctx_state) {
+ case TFRC_SSTATE_NO_SENT:
+ /* if first wasn't pure ack */
+ if (len != 0)
+ printk(KERN_CRIT "%s: %s, First packet sent is noted "
+ "as a data packet\n",
+ __FUNCTION__, dccp_role(sk));
+ return;
+ case TFRC_SSTATE_NO_FBACK:
+ case TFRC_SSTATE_FBACK:
+ if (len > 0) {
+ hctx->ccid3hctx_t_nom = now;
+ ccid3_calc_new_t_ipi(hctx);
+ ccid3_calc_new_delta(hctx);
+ timeval_add_usecs(&hctx->ccid3hctx_t_nom,
+ hctx->ccid3hctx_t_ipi);
+ }
+ break;
+ default:
+ printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
+ __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
+ dump_stack();
+ break;
+ }
+}
+
+static void ccid3_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+ struct ccid3_options_received *opt_recv;
+ struct dccp_tx_hist_entry *packet;
+ unsigned long next_tmout;
+ u32 t_elapsed;
+ u32 pinv;
+ u32 x_recv;
+ u32 r_sample;
+
+ if (hctx == NULL)
+ return;
+
+ if (hctx->ccid3hctx_state == TFRC_SSTATE_TERM) {
+ ccid3_pr_debug("%s, sk=%p, received a packet when "
+ "terminating!\n", dccp_role(sk), sk);
+ return;
+ }
+
+ /* we are only interested in ACKs */
+ if (!(DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_ACK ||
+ DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_DATAACK))
+ return;
+
+ opt_recv = &hctx->ccid3hctx_options_received;
+
+ t_elapsed = dp->dccps_options_received.dccpor_elapsed_time;
+ x_recv = opt_recv->ccid3or_receive_rate;
+ pinv = opt_recv->ccid3or_loss_event_rate;
+
+ switch (hctx->ccid3hctx_state) {
+ case TFRC_SSTATE_NO_SENT:
+ /* FIXME: what to do here? */
+ return;
+ case TFRC_SSTATE_NO_FBACK:
+ case TFRC_SSTATE_FBACK:
+ /* Calculate new round trip sample by
+ * R_sample = (now - t_recvdata) - t_delay */
+ /* get t_recvdata from history */
+ packet = dccp_tx_hist_find_entry(&hctx->ccid3hctx_hist,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ if (packet == NULL) {
+ ccid3_pr_debug("%s, sk=%p, seqno %llu(%s) does't "
+ "exist in history!\n",
+ dccp_role(sk), sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
+ return;
+ }
+
+ /* Update RTT */
+ r_sample = timeval_now_delta(&packet->dccphtx_tstamp);
+ /* FIXME: */
+ // r_sample -= usecs_to_jiffies(t_elapsed * 10);
+
+ /* Update RTT estimate by
+ * If (No feedback recv)
+ * R = R_sample;
+ * Else
+ * R = q * R + (1 - q) * R_sample;
+ *
+ * q is a constant, RFC 3448 recomments 0.9
+ */
+ if (hctx->ccid3hctx_state == TFRC_SSTATE_NO_FBACK) {
+ ccid3_hc_tx_set_state(sk, TFRC_SSTATE_FBACK);
+ hctx->ccid3hctx_rtt = r_sample;
+ } else
+ hctx->ccid3hctx_rtt = (hctx->ccid3hctx_rtt * 9) / 10 +
+ r_sample / 10;
+
+ ccid3_pr_debug("%s, sk=%p, New RTT estimate=%uus, "
+ "r_sample=%us\n", dccp_role(sk), sk,
+ hctx->ccid3hctx_rtt, r_sample);
+
+ /* Update timeout interval */
+ hctx->ccid3hctx_t_rto = max_t(u32, 4 * hctx->ccid3hctx_rtt,
+ USEC_PER_SEC);
+
+ /* Update receive rate */
+ hctx->ccid3hctx_x_recv = x_recv;/* X_recv in bytes per sec */
+
+ /* Update loss event rate */
+ if (pinv == ~0 || pinv == 0)
+ hctx->ccid3hctx_p = 0;
+ else {
+ hctx->ccid3hctx_p = 1000000 / pinv;
+
+ if (hctx->ccid3hctx_p < TFRC_SMALLEST_P) {
+ hctx->ccid3hctx_p = TFRC_SMALLEST_P;
+ ccid3_pr_debug("%s, sk=%p, Smallest p used!\n",
+ dccp_role(sk), sk);
+ }
+ }
+
+ /* unschedule no feedback timer */
+ sk_stop_timer(sk, &hctx->ccid3hctx_no_feedback_timer);
+
+ /* Update sending rate */
+ ccid3_hc_tx_update_x(sk);
+
+ /* Update next send time */
+ timeval_sub_usecs(&hctx->ccid3hctx_t_nom,
+ hctx->ccid3hctx_t_ipi);
+ ccid3_calc_new_t_ipi(hctx);
+ timeval_add_usecs(&hctx->ccid3hctx_t_nom,
+ hctx->ccid3hctx_t_ipi);
+ ccid3_calc_new_delta(hctx);
+
+ /* remove all packets older than the one acked from history */
+ dccp_tx_hist_purge_older(ccid3_tx_hist,
+ &hctx->ccid3hctx_hist, packet);
+ /*
+ * As we have calculated new ipi, delta, t_nom it is possible that
+ * we now can send a packet, so wake up dccp_wait_for_ccids.
+ */
+ sk->sk_write_space(sk);
+
+ /*
+ * Schedule no feedback timer to expire in
+ * max(4 * R, 2 * s / X)
+ */
+ next_tmout = max(hctx->ccid3hctx_t_rto,
+ 2 * usecs_div(hctx->ccid3hctx_s,
+ hctx->ccid3hctx_x));
+
+ ccid3_pr_debug("%s, sk=%p, Scheduled no feedback timer to "
+ "expire in %lu jiffies (%luus)\n",
+ dccp_role(sk), sk,
+ usecs_to_jiffies(next_tmout), next_tmout);
+
+ sk_reset_timer(sk, &hctx->ccid3hctx_no_feedback_timer,
+ jiffies + max_t(u32, 1, usecs_to_jiffies(next_tmout)));
+
+ /* set idle flag */
+ hctx->ccid3hctx_idle = 1;
+ break;
+ default:
+ printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
+ __FUNCTION__, dccp_role(sk), sk, hctx->ccid3hctx_state);
+ dump_stack();
+ break;
+ }
+}
+
+static void ccid3_hc_tx_insert_options(struct sock *sk, struct sk_buff *skb)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+
+ if (hctx == NULL || !(sk->sk_state == DCCP_OPEN ||
+ sk->sk_state == DCCP_PARTOPEN))
+ return;
+
+ DCCP_SKB_CB(skb)->dccpd_ccval = hctx->ccid3hctx_last_win_count;
+}
+
+static int ccid3_hc_tx_parse_options(struct sock *sk, unsigned char option,
+ unsigned char len, u16 idx,
+ unsigned char *value)
+{
+ int rc = 0;
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+ struct ccid3_options_received *opt_recv;
+
+ if (hctx == NULL)
+ return 0;
+
+ opt_recv = &hctx->ccid3hctx_options_received;
+
+ if (opt_recv->ccid3or_seqno != dp->dccps_gsr) {
+ opt_recv->ccid3or_seqno = dp->dccps_gsr;
+ opt_recv->ccid3or_loss_event_rate = ~0;
+ opt_recv->ccid3or_loss_intervals_idx = 0;
+ opt_recv->ccid3or_loss_intervals_len = 0;
+ opt_recv->ccid3or_receive_rate = 0;
+ }
+
+ switch (option) {
+ case TFRC_OPT_LOSS_EVENT_RATE:
+ if (len != 4) {
+ ccid3_pr_debug("%s, sk=%p, invalid len for "
+ "TFRC_OPT_LOSS_EVENT_RATE\n",
+ dccp_role(sk), sk);
+ rc = -EINVAL;
+ } else {
+ opt_recv->ccid3or_loss_event_rate = ntohl(*(u32 *)value);
+ ccid3_pr_debug("%s, sk=%p, LOSS_EVENT_RATE=%u\n",
+ dccp_role(sk), sk,
+ opt_recv->ccid3or_loss_event_rate);
+ }
+ break;
+ case TFRC_OPT_LOSS_INTERVALS:
+ opt_recv->ccid3or_loss_intervals_idx = idx;
+ opt_recv->ccid3or_loss_intervals_len = len;
+ ccid3_pr_debug("%s, sk=%p, LOSS_INTERVALS=(%u, %u)\n",
+ dccp_role(sk), sk,
+ opt_recv->ccid3or_loss_intervals_idx,
+ opt_recv->ccid3or_loss_intervals_len);
+ break;
+ case TFRC_OPT_RECEIVE_RATE:
+ if (len != 4) {
+ ccid3_pr_debug("%s, sk=%p, invalid len for "
+ "TFRC_OPT_RECEIVE_RATE\n",
+ dccp_role(sk), sk);
+ rc = -EINVAL;
+ } else {
+ opt_recv->ccid3or_receive_rate = ntohl(*(u32 *)value);
+ ccid3_pr_debug("%s, sk=%p, RECEIVE_RATE=%u\n",
+ dccp_role(sk), sk,
+ opt_recv->ccid3or_receive_rate);
+ }
+ break;
+ }
+
+ return rc;
+}
+
+static int ccid3_hc_tx_init(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx;
+
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+
+ hctx = dp->dccps_hc_tx_ccid_private = kmalloc(sizeof(*hctx),
+ gfp_any());
+ if (hctx == NULL)
+ return -ENOMEM;
+
+ memset(hctx, 0, sizeof(*hctx));
+
+ if (dp->dccps_packet_size >= TFRC_MIN_PACKET_SIZE &&
+ dp->dccps_packet_size <= TFRC_MAX_PACKET_SIZE)
+ hctx->ccid3hctx_s = dp->dccps_packet_size;
+ else
+ hctx->ccid3hctx_s = TFRC_STD_PACKET_SIZE;
+
+ /* Set transmission rate to 1 packet per second */
+ hctx->ccid3hctx_x = hctx->ccid3hctx_s;
+ hctx->ccid3hctx_t_rto = USEC_PER_SEC;
+ hctx->ccid3hctx_state = TFRC_SSTATE_NO_SENT;
+ INIT_LIST_HEAD(&hctx->ccid3hctx_hist);
+ init_timer(&hctx->ccid3hctx_no_feedback_timer);
+
+ return 0;
+}
+
+static void ccid3_hc_tx_exit(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+ BUG_ON(hctx == NULL);
+
+ ccid3_hc_tx_set_state(sk, TFRC_SSTATE_TERM);
+ sk_stop_timer(sk, &hctx->ccid3hctx_no_feedback_timer);
+
+ /* Empty packet history */
+ dccp_tx_hist_purge(ccid3_tx_hist, &hctx->ccid3hctx_hist);
+
+ kfree(dp->dccps_hc_tx_ccid_private);
+ dp->dccps_hc_tx_ccid_private = NULL;
+}
+
+/*
+ * RX Half Connection methods
+ */
+
+/* TFRC receiver states */
+enum ccid3_hc_rx_states {
+ TFRC_RSTATE_NO_DATA = 1,
+ TFRC_RSTATE_DATA,
+ TFRC_RSTATE_TERM = 127,
+};
+
+#ifdef CCID3_DEBUG
+static const char *ccid3_rx_state_name(enum ccid3_hc_rx_states state)
+{
+ static char *ccid3_rx_state_names[] = {
+ [TFRC_RSTATE_NO_DATA] = "NO_DATA",
+ [TFRC_RSTATE_DATA] = "DATA",
+ [TFRC_RSTATE_TERM] = "TERM",
+ };
+
+ return ccid3_rx_state_names[state];
+}
+#endif
+
+static inline void ccid3_hc_rx_set_state(struct sock *sk,
+ enum ccid3_hc_rx_states state)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+ enum ccid3_hc_rx_states oldstate = hcrx->ccid3hcrx_state;
+
+ ccid3_pr_debug("%s(%p) %-8.8s -> %s\n",
+ dccp_role(sk), sk, ccid3_rx_state_name(oldstate),
+ ccid3_rx_state_name(state));
+ WARN_ON(state == oldstate);
+ hcrx->ccid3hcrx_state = state;
+}
+
+static void ccid3_hc_rx_send_feedback(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+ struct dccp_rx_hist_entry *packet;
+ struct timeval now;
+
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+
+ do_gettimeofday(&now);
+
+ switch (hcrx->ccid3hcrx_state) {
+ case TFRC_RSTATE_NO_DATA:
+ hcrx->ccid3hcrx_x_recv = 0;
+ break;
+ case TFRC_RSTATE_DATA: {
+ const u32 delta = timeval_delta(&now,
+ &hcrx->ccid3hcrx_tstamp_last_feedback);
+
+ hcrx->ccid3hcrx_x_recv = (hcrx->ccid3hcrx_bytes_recv *
+ USEC_PER_SEC);
+ if (likely(delta > 1))
+ hcrx->ccid3hcrx_x_recv /= delta;
+ }
+ break;
+ default:
+ printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
+ __FUNCTION__, dccp_role(sk), sk, hcrx->ccid3hcrx_state);
+ dump_stack();
+ return;
+ }
+
+ packet = dccp_rx_hist_find_data_packet(&hcrx->ccid3hcrx_hist);
+ if (packet == NULL) {
+ printk(KERN_CRIT "%s: %s, sk=%p, no data packet in history!\n",
+ __FUNCTION__, dccp_role(sk), sk);
+ dump_stack();
+ return;
+ }
+
+ hcrx->ccid3hcrx_tstamp_last_feedback = now;
+ hcrx->ccid3hcrx_last_counter = packet->dccphrx_ccval;
+ hcrx->ccid3hcrx_seqno_last_counter = packet->dccphrx_seqno;
+ hcrx->ccid3hcrx_bytes_recv = 0;
+
+ /* Convert to multiples of 10us */
+ hcrx->ccid3hcrx_elapsed_time =
+ timeval_delta(&now, &packet->dccphrx_tstamp) / 10;
+ if (hcrx->ccid3hcrx_p == 0)
+ hcrx->ccid3hcrx_pinv = ~0;
+ else
+ hcrx->ccid3hcrx_pinv = 1000000 / hcrx->ccid3hcrx_p;
+ dccp_send_ack(sk);
+}
+
+static void ccid3_hc_rx_insert_options(struct sock *sk, struct sk_buff *skb)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ u32 x_recv, pinv;
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+
+ if (hcrx == NULL || !(sk->sk_state == DCCP_OPEN ||
+ sk->sk_state == DCCP_PARTOPEN))
+ return;
+
+ DCCP_SKB_CB(skb)->dccpd_ccval = hcrx->ccid3hcrx_last_counter;
+
+ if (dccp_packet_without_ack(skb))
+ return;
+
+ if (hcrx->ccid3hcrx_elapsed_time != 0)
+ dccp_insert_option_elapsed_time(sk, skb,
+ hcrx->ccid3hcrx_elapsed_time);
+ dccp_insert_option_timestamp(sk, skb);
+ x_recv = htonl(hcrx->ccid3hcrx_x_recv);
+ pinv = htonl(hcrx->ccid3hcrx_pinv);
+ dccp_insert_option(sk, skb, TFRC_OPT_LOSS_EVENT_RATE,
+ &pinv, sizeof(pinv));
+ dccp_insert_option(sk, skb, TFRC_OPT_RECEIVE_RATE,
+ &x_recv, sizeof(x_recv));
+}
+
+/* calculate first loss interval
+ *
+ * returns estimated loss interval in usecs */
+
+static u32 ccid3_hc_rx_calc_first_li(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+ struct dccp_rx_hist_entry *entry, *next, *tail = NULL;
+ u32 rtt, delta, x_recv, fval, p, tmp2;
+ struct timeval tstamp = { 0, };
+ int interval = 0;
+ int win_count = 0;
+ int step = 0;
+ u64 tmp1;
+
+ list_for_each_entry_safe(entry, next, &hcrx->ccid3hcrx_hist,
+ dccphrx_node) {
+ if (dccp_rx_hist_entry_data_packet(entry)) {
+ tail = entry;
+
+ switch (step) {
+ case 0:
+ tstamp = entry->dccphrx_tstamp;
+ win_count = entry->dccphrx_ccval;
+ step = 1;
+ break;
+ case 1:
+ interval = win_count - entry->dccphrx_ccval;
+ if (interval < 0)
+ interval += TFRC_WIN_COUNT_LIMIT;
+ if (interval > 4)
+ goto found;
+ break;
+ }
+ }
+ }
+
+ if (step == 0) {
+ printk(KERN_CRIT "%s: %s, sk=%p, packet history contains no "
+ "data packets!\n",
+ __FUNCTION__, dccp_role(sk), sk);
+ return ~0;
+ }
+
+ if (interval == 0) {
+ ccid3_pr_debug("%s, sk=%p, Could not find a win_count "
+ "interval > 0. Defaulting to 1\n",
+ dccp_role(sk), sk);
+ interval = 1;
+ }
+found:
+ rtt = timeval_delta(&tstamp, &tail->dccphrx_tstamp) * 4 / interval;
+ ccid3_pr_debug("%s, sk=%p, approximated RTT to %uus\n",
+ dccp_role(sk), sk, rtt);
+ if (rtt == 0)
+ rtt = 1;
+
+ delta = timeval_now_delta(&hcrx->ccid3hcrx_tstamp_last_feedback);
+ x_recv = hcrx->ccid3hcrx_bytes_recv * USEC_PER_SEC;
+ if (likely(delta > 1))
+ x_recv /= delta;
+
+ tmp1 = (u64)x_recv * (u64)rtt;
+ do_div(tmp1,10000000);
+ tmp2 = (u32)tmp1;
+ fval = (hcrx->ccid3hcrx_s * 100000) / tmp2;
+ /* do not alter order above or you will get overflow on 32 bit */
+ p = tfrc_calc_x_reverse_lookup(fval);
+ ccid3_pr_debug("%s, sk=%p, receive rate=%u bytes/s, implied "
+ "loss rate=%u\n", dccp_role(sk), sk, x_recv, p);
+
+ if (p == 0)
+ return ~0;
+ else
+ return 1000000 / p;
+}
+
+static void ccid3_hc_rx_update_li(struct sock *sk, u64 seq_loss, u8 win_loss)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+
+ if (seq_loss != DCCP_MAX_SEQNO + 1 &&
+ list_empty(&hcrx->ccid3hcrx_li_hist)) {
+ struct dccp_li_hist_entry *li_tail;
+
+ li_tail = dccp_li_hist_interval_new(ccid3_li_hist,
+ &hcrx->ccid3hcrx_li_hist,
+ seq_loss, win_loss);
+ if (li_tail == NULL)
+ return;
+ li_tail->dccplih_interval = ccid3_hc_rx_calc_first_li(sk);
+ }
+ /* FIXME: find end of interval */
+}
+
+static void ccid3_hc_rx_detect_loss(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+ u8 win_loss;
+ const u64 seq_loss = dccp_rx_hist_detect_loss(&hcrx->ccid3hcrx_hist,
+ &hcrx->ccid3hcrx_li_hist,
+ &win_loss);
+
+ ccid3_hc_rx_update_li(sk, seq_loss, win_loss);
+}
+
+static void ccid3_hc_rx_packet_recv(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+ const struct dccp_options_received *opt_recv;
+ struct dccp_rx_hist_entry *packet;
+ struct timeval now;
+ u8 win_count;
+ u32 p_prev;
+ int ins;
+
+ if (hcrx == NULL)
+ return;
+
+ BUG_ON(!(hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA ||
+ hcrx->ccid3hcrx_state == TFRC_RSTATE_DATA));
+
+ opt_recv = &dp->dccps_options_received;
+
+ switch (DCCP_SKB_CB(skb)->dccpd_type) {
+ case DCCP_PKT_ACK:
+ if (hcrx->ccid3hcrx_state == TFRC_RSTATE_NO_DATA)
+ return;
+ case DCCP_PKT_DATAACK:
+ if (opt_recv->dccpor_timestamp_echo == 0)
+ break;
+ p_prev = hcrx->ccid3hcrx_rtt;
+ do_gettimeofday(&now);
+ hcrx->ccid3hcrx_rtt = timeval_usecs(&now) -
+ (opt_recv->dccpor_timestamp_echo -
+ opt_recv->dccpor_elapsed_time) * 10;
+ if (p_prev != hcrx->ccid3hcrx_rtt)
+ ccid3_pr_debug("%s, New RTT=%luus, elapsed time=%u\n",
+ dccp_role(sk), hcrx->ccid3hcrx_rtt,
+ opt_recv->dccpor_elapsed_time);
+ break;
+ case DCCP_PKT_DATA:
+ break;
+ default:
+ ccid3_pr_debug("%s, sk=%p, not DATA/DATAACK/ACK packet(%s)\n",
+ dccp_role(sk), sk,
+ dccp_packet_name(DCCP_SKB_CB(skb)->dccpd_type));
+ return;
+ }
+
+ packet = dccp_rx_hist_entry_new(ccid3_rx_hist, opt_recv->dccpor_ndp,
+ skb, SLAB_ATOMIC);
+ if (packet == NULL) {
+ ccid3_pr_debug("%s, sk=%p, Not enough mem to add rx packet "
+ "to history (consider it lost)!",
+ dccp_role(sk), sk);
+ return;
+ }
+
+ win_count = packet->dccphrx_ccval;
+
+ ins = dccp_rx_hist_add_packet(ccid3_rx_hist, &hcrx->ccid3hcrx_hist,
+ &hcrx->ccid3hcrx_li_hist, packet);
+
+ if (DCCP_SKB_CB(skb)->dccpd_type == DCCP_PKT_ACK)
+ return;
+
+ switch (hcrx->ccid3hcrx_state) {
+ case TFRC_RSTATE_NO_DATA:
+ ccid3_pr_debug("%s, sk=%p(%s), skb=%p, sending initial "
+ "feedback\n",
+ dccp_role(sk), sk,
+ dccp_state_name(sk->sk_state), skb);
+ ccid3_hc_rx_send_feedback(sk);
+ ccid3_hc_rx_set_state(sk, TFRC_RSTATE_DATA);
+ return;
+ case TFRC_RSTATE_DATA:
+ hcrx->ccid3hcrx_bytes_recv += skb->len -
+ dccp_hdr(skb)->dccph_doff * 4;
+ if (ins != 0)
+ break;
+
+ do_gettimeofday(&now);
+ if (timeval_delta(&now, &hcrx->ccid3hcrx_tstamp_last_ack) >=
+ hcrx->ccid3hcrx_rtt) {
+ hcrx->ccid3hcrx_tstamp_last_ack = now;
+ ccid3_hc_rx_send_feedback(sk);
+ }
+ return;
+ default:
+ printk(KERN_CRIT "%s: %s, sk=%p, Illegal state (%d)!\n",
+ __FUNCTION__, dccp_role(sk), sk, hcrx->ccid3hcrx_state);
+ dump_stack();
+ return;
+ }
+
+ /* Dealing with packet loss */
+ ccid3_pr_debug("%s, sk=%p(%s), data loss! Reacting...\n",
+ dccp_role(sk), sk, dccp_state_name(sk->sk_state));
+
+ ccid3_hc_rx_detect_loss(sk);
+ p_prev = hcrx->ccid3hcrx_p;
+
+ /* Calculate loss event rate */
+ if (!list_empty(&hcrx->ccid3hcrx_li_hist))
+ /* Scaling up by 1000000 as fixed decimal */
+ hcrx->ccid3hcrx_p = 1000000 / dccp_li_hist_calc_i_mean(&hcrx->ccid3hcrx_li_hist);
+
+ if (hcrx->ccid3hcrx_p > p_prev) {
+ ccid3_hc_rx_send_feedback(sk);
+ return;
+ }
+}
+
+static int ccid3_hc_rx_init(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx;
+
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+
+ hcrx = dp->dccps_hc_rx_ccid_private = kmalloc(sizeof(*hcrx),
+ gfp_any());
+ if (hcrx == NULL)
+ return -ENOMEM;
+
+ memset(hcrx, 0, sizeof(*hcrx));
+
+ if (dp->dccps_packet_size >= TFRC_MIN_PACKET_SIZE &&
+ dp->dccps_packet_size <= TFRC_MAX_PACKET_SIZE)
+ hcrx->ccid3hcrx_s = dp->dccps_packet_size;
+ else
+ hcrx->ccid3hcrx_s = TFRC_STD_PACKET_SIZE;
+
+ hcrx->ccid3hcrx_state = TFRC_RSTATE_NO_DATA;
+ INIT_LIST_HEAD(&hcrx->ccid3hcrx_hist);
+ INIT_LIST_HEAD(&hcrx->ccid3hcrx_li_hist);
+ /*
+ * XXX this seems to be paranoid, need to think more about this, for
+ * now start with something different than zero. -acme
+ */
+ hcrx->ccid3hcrx_rtt = USEC_PER_SEC / 5;
+ return 0;
+}
+
+static void ccid3_hc_rx_exit(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+
+ ccid3_pr_debug("%s, sk=%p\n", dccp_role(sk), sk);
+
+ if (hcrx == NULL)
+ return;
+
+ ccid3_hc_rx_set_state(sk, TFRC_RSTATE_TERM);
+
+ /* Empty packet history */
+ dccp_rx_hist_purge(ccid3_rx_hist, &hcrx->ccid3hcrx_hist);
+
+ /* Empty loss interval history */
+ dccp_li_hist_purge(ccid3_li_hist, &hcrx->ccid3hcrx_li_hist);
+
+ kfree(dp->dccps_hc_rx_ccid_private);
+ dp->dccps_hc_rx_ccid_private = NULL;
+}
+
+static void ccid3_hc_rx_get_info(struct sock *sk, struct tcp_info *info)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ const struct ccid3_hc_rx_sock *hcrx = dp->dccps_hc_rx_ccid_private;
+
+ if (hcrx == NULL)
+ return;
+
+ info->tcpi_ca_state = hcrx->ccid3hcrx_state;
+ info->tcpi_options |= TCPI_OPT_TIMESTAMPS;
+ info->tcpi_rcv_rtt = hcrx->ccid3hcrx_rtt;
+}
+
+static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ const struct ccid3_hc_tx_sock *hctx = dp->dccps_hc_tx_ccid_private;
+
+ if (hctx == NULL)
+ return;
+
+ info->tcpi_rto = hctx->ccid3hctx_t_rto;
+ info->tcpi_rtt = hctx->ccid3hctx_rtt;
+}
+
+static struct ccid ccid3 = {
+ .ccid_id = 3,
+ .ccid_name = "ccid3",
+ .ccid_owner = THIS_MODULE,
+ .ccid_init = ccid3_init,
+ .ccid_exit = ccid3_exit,
+ .ccid_hc_tx_init = ccid3_hc_tx_init,
+ .ccid_hc_tx_exit = ccid3_hc_tx_exit,
+ .ccid_hc_tx_send_packet = ccid3_hc_tx_send_packet,
+ .ccid_hc_tx_packet_sent = ccid3_hc_tx_packet_sent,
+ .ccid_hc_tx_packet_recv = ccid3_hc_tx_packet_recv,
+ .ccid_hc_tx_insert_options = ccid3_hc_tx_insert_options,
+ .ccid_hc_tx_parse_options = ccid3_hc_tx_parse_options,
+ .ccid_hc_rx_init = ccid3_hc_rx_init,
+ .ccid_hc_rx_exit = ccid3_hc_rx_exit,
+ .ccid_hc_rx_insert_options = ccid3_hc_rx_insert_options,
+ .ccid_hc_rx_packet_recv = ccid3_hc_rx_packet_recv,
+ .ccid_hc_rx_get_info = ccid3_hc_rx_get_info,
+ .ccid_hc_tx_get_info = ccid3_hc_tx_get_info,
+};
+
+module_param(ccid3_debug, int, 0444);
+MODULE_PARM_DESC(ccid3_debug, "Enable debug messages");
+
+static __init int ccid3_module_init(void)
+{
+ int rc = -ENOBUFS;
+
+ ccid3_rx_hist = dccp_rx_hist_new("ccid3");
+ if (ccid3_rx_hist == NULL)
+ goto out;
+
+ ccid3_tx_hist = dccp_tx_hist_new("ccid3");
+ if (ccid3_tx_hist == NULL)
+ goto out_free_rx;
+
+ ccid3_li_hist = dccp_li_hist_new("ccid3");
+ if (ccid3_li_hist == NULL)
+ goto out_free_tx;
+
+ rc = ccid_register(&ccid3);
+ if (rc != 0)
+ goto out_free_loss_interval_history;
+out:
+ return rc;
+
+out_free_loss_interval_history:
+ dccp_li_hist_delete(ccid3_li_hist);
+ ccid3_li_hist = NULL;
+out_free_tx:
+ dccp_tx_hist_delete(ccid3_tx_hist);
+ ccid3_tx_hist = NULL;
+out_free_rx:
+ dccp_rx_hist_delete(ccid3_rx_hist);
+ ccid3_rx_hist = NULL;
+ goto out;
+}
+module_init(ccid3_module_init);
+
+static __exit void ccid3_module_exit(void)
+{
+#ifdef CONFIG_IP_DCCP_UNLOAD_HACK
+ /*
+ * Hack to use while developing, so that we get rid of the control
+ * sock, that is what keeps a refcount on dccp.ko -acme
+ */
+ extern void dccp_ctl_sock_exit(void);
+
+ dccp_ctl_sock_exit();
+#endif
+ ccid_unregister(&ccid3);
+
+ if (ccid3_tx_hist != NULL) {
+ dccp_tx_hist_delete(ccid3_tx_hist);
+ ccid3_tx_hist = NULL;
+ }
+ if (ccid3_rx_hist != NULL) {
+ dccp_rx_hist_delete(ccid3_rx_hist);
+ ccid3_rx_hist = NULL;
+ }
+ if (ccid3_li_hist != NULL) {
+ dccp_li_hist_delete(ccid3_li_hist);
+ ccid3_li_hist = NULL;
+ }
+}
+module_exit(ccid3_module_exit);
+
+MODULE_AUTHOR("Ian McDonald <iam4@cs.waikato.ac.nz>, "
+ "Arnaldo Carvalho de Melo <acme@ghostprotocols.net>");
+MODULE_DESCRIPTION("DCCP TFRC CCID3 CCID");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("net-dccp-ccid-3");
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
new file mode 100644
index 000000000000..ee8cbace6630
--- /dev/null
+++ b/net/dccp/ccids/ccid3.h
@@ -0,0 +1,137 @@
+/*
+ * net/dccp/ccids/ccid3.h
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ *
+ * An implementation of the DCCP protocol
+ *
+ * This code has been developed by the University of Waikato WAND
+ * research group. For further information please see http://www.wand.net.nz/
+ * or e-mail Ian McDonald - iam4@cs.waikato.ac.nz
+ *
+ * This code also uses code from Lulea University, rereleased as GPL by its
+ * authors:
+ * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ * Changes to meet Linux coding standards, to make it meet latest ccid3 draft
+ * and to make it work as a loadable module in the DCCP stack written by
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>.
+ *
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef _DCCP_CCID3_H_
+#define _DCCP_CCID3_H_
+
+#include <linux/config.h>
+#include <linux/list.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+#define TFRC_MIN_PACKET_SIZE 16
+#define TFRC_STD_PACKET_SIZE 256
+#define TFRC_MAX_PACKET_SIZE 65535
+
+/* Two seconds as per CCID3 spec */
+#define TFRC_INITIAL_TIMEOUT (2 * USEC_PER_SEC)
+
+/* In usecs - half the scheduling granularity as per RFC3448 4.6 */
+#define TFRC_OPSYS_HALF_TIME_GRAN (USEC_PER_SEC / (2 * HZ))
+
+/* In seconds */
+#define TFRC_MAX_BACK_OFF_TIME 64
+
+#define TFRC_SMALLEST_P 40
+
+enum ccid3_options {
+ TFRC_OPT_LOSS_EVENT_RATE = 192,
+ TFRC_OPT_LOSS_INTERVALS = 193,
+ TFRC_OPT_RECEIVE_RATE = 194,
+};
+
+struct ccid3_options_received {
+ u64 ccid3or_seqno:48,
+ ccid3or_loss_intervals_idx:16;
+ u16 ccid3or_loss_intervals_len;
+ u32 ccid3or_loss_event_rate;
+ u32 ccid3or_receive_rate;
+};
+
+/** struct ccid3_hc_tx_sock - CCID3 sender half connection sock
+ *
+ * @ccid3hctx_state - Sender state
+ * @ccid3hctx_x - Current sending rate
+ * @ccid3hctx_x_recv - Receive rate
+ * @ccid3hctx_x_calc - Calculated send (?) rate
+ * @ccid3hctx_s - Packet size
+ * @ccid3hctx_rtt - Estimate of current round trip time in usecs
+ * @@ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000
+ * @ccid3hctx_last_win_count - Last window counter sent
+ * @ccid3hctx_t_last_win_count - Timestamp of earliest packet
+ * with last_win_count value sent
+ * @ccid3hctx_no_feedback_timer - Handle to no feedback timer
+ * @ccid3hctx_idle - FIXME
+ * @ccid3hctx_t_ld - Time last doubled during slow start
+ * @ccid3hctx_t_nom - Nominal send time of next packet
+ * @ccid3hctx_t_ipi - Interpacket (send) interval
+ * @ccid3hctx_delta - Send timer delta
+ * @ccid3hctx_hist - Packet history
+ */
+struct ccid3_hc_tx_sock {
+ u32 ccid3hctx_x;
+ u32 ccid3hctx_x_recv;
+ u32 ccid3hctx_x_calc;
+ u16 ccid3hctx_s;
+ u32 ccid3hctx_rtt;
+ u32 ccid3hctx_p;
+ u8 ccid3hctx_state;
+ u8 ccid3hctx_last_win_count;
+ u8 ccid3hctx_idle;
+ struct timeval ccid3hctx_t_last_win_count;
+ struct timer_list ccid3hctx_no_feedback_timer;
+ struct timeval ccid3hctx_t_ld;
+ struct timeval ccid3hctx_t_nom;
+ u32 ccid3hctx_t_rto;
+ u32 ccid3hctx_t_ipi;
+ u32 ccid3hctx_delta;
+ struct list_head ccid3hctx_hist;
+ struct ccid3_options_received ccid3hctx_options_received;
+};
+
+struct ccid3_hc_rx_sock {
+ u64 ccid3hcrx_seqno_last_counter:48,
+ ccid3hcrx_state:8,
+ ccid3hcrx_last_counter:4;
+ unsigned long ccid3hcrx_rtt;
+ u32 ccid3hcrx_p;
+ u32 ccid3hcrx_bytes_recv;
+ struct timeval ccid3hcrx_tstamp_last_feedback;
+ struct timeval ccid3hcrx_tstamp_last_ack;
+ struct list_head ccid3hcrx_hist;
+ struct list_head ccid3hcrx_li_hist;
+ u16 ccid3hcrx_s;
+ u32 ccid3hcrx_pinv;
+ u32 ccid3hcrx_elapsed_time;
+ u32 ccid3hcrx_x_recv;
+};
+
+#define ccid3_hc_tx_field(s,field) (s->dccps_hc_tx_ccid_private == NULL ? 0 : \
+ ((struct ccid3_hc_tx_sock *)s->dccps_hc_tx_ccid_private)->ccid3hctx_##field)
+
+#define ccid3_hc_rx_field(s,field) (s->dccps_hc_rx_ccid_private == NULL ? 0 : \
+ ((struct ccid3_hc_rx_sock *)s->dccps_hc_rx_ccid_private)->ccid3hcrx_##field)
+
+#endif /* _DCCP_CCID3_H_ */
diff --git a/net/dccp/ccids/lib/Makefile b/net/dccp/ccids/lib/Makefile
new file mode 100644
index 000000000000..5f940a6cbaca
--- /dev/null
+++ b/net/dccp/ccids/lib/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_IP_DCCP_TFRC_LIB) += dccp_tfrc_lib.o
+
+dccp_tfrc_lib-y := loss_interval.o packet_history.o tfrc_equation.o
diff --git a/net/dccp/ccids/lib/loss_interval.c b/net/dccp/ccids/lib/loss_interval.c
new file mode 100644
index 000000000000..4c01a54143ad
--- /dev/null
+++ b/net/dccp/ccids/lib/loss_interval.c
@@ -0,0 +1,144 @@
+/*
+ * net/dccp/ccids/lib/loss_interval.c
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include "loss_interval.h"
+
+struct dccp_li_hist *dccp_li_hist_new(const char *name)
+{
+ struct dccp_li_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
+ static const char dccp_li_hist_mask[] = "li_hist_%s";
+ char *slab_name;
+
+ if (hist == NULL)
+ goto out;
+
+ slab_name = kmalloc(strlen(name) + sizeof(dccp_li_hist_mask) - 1,
+ GFP_ATOMIC);
+ if (slab_name == NULL)
+ goto out_free_hist;
+
+ sprintf(slab_name, dccp_li_hist_mask, name);
+ hist->dccplih_slab = kmem_cache_create(slab_name,
+ sizeof(struct dccp_li_hist_entry),
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+ if (hist->dccplih_slab == NULL)
+ goto out_free_slab_name;
+out:
+ return hist;
+out_free_slab_name:
+ kfree(slab_name);
+out_free_hist:
+ kfree(hist);
+ hist = NULL;
+ goto out;
+}
+
+EXPORT_SYMBOL_GPL(dccp_li_hist_new);
+
+void dccp_li_hist_delete(struct dccp_li_hist *hist)
+{
+ const char* name = kmem_cache_name(hist->dccplih_slab);
+
+ kmem_cache_destroy(hist->dccplih_slab);
+ kfree(name);
+ kfree(hist);
+}
+
+EXPORT_SYMBOL_GPL(dccp_li_hist_delete);
+
+void dccp_li_hist_purge(struct dccp_li_hist *hist, struct list_head *list)
+{
+ struct dccp_li_hist_entry *entry, *next;
+
+ list_for_each_entry_safe(entry, next, list, dccplih_node) {
+ list_del_init(&entry->dccplih_node);
+ kmem_cache_free(hist->dccplih_slab, entry);
+ }
+}
+
+EXPORT_SYMBOL_GPL(dccp_li_hist_purge);
+
+/* Weights used to calculate loss event rate */
+/*
+ * These are integers as per section 8 of RFC3448. We can then divide by 4 *
+ * when we use it.
+ */
+static const int dccp_li_hist_w[DCCP_LI_HIST_IVAL_F_LENGTH] = {
+ 4, 4, 4, 4, 3, 2, 1, 1,
+};
+
+u32 dccp_li_hist_calc_i_mean(struct list_head *list)
+{
+ struct dccp_li_hist_entry *li_entry, *li_next;
+ int i = 0;
+ u32 i_tot;
+ u32 i_tot0 = 0;
+ u32 i_tot1 = 0;
+ u32 w_tot = 0;
+
+ list_for_each_entry_safe(li_entry, li_next, list, dccplih_node) {
+ if (i < DCCP_LI_HIST_IVAL_F_LENGTH) {
+ i_tot0 += li_entry->dccplih_interval * dccp_li_hist_w[i];
+ w_tot += dccp_li_hist_w[i];
+ }
+
+ if (i != 0)
+ i_tot1 += li_entry->dccplih_interval * dccp_li_hist_w[i - 1];
+
+ if (++i > DCCP_LI_HIST_IVAL_F_LENGTH)
+ break;
+ }
+
+ if (i != DCCP_LI_HIST_IVAL_F_LENGTH)
+ return 0;
+
+ i_tot = max(i_tot0, i_tot1);
+
+ /* FIXME: Why do we do this? -Ian McDonald */
+ if (i_tot * 4 < w_tot)
+ i_tot = w_tot * 4;
+
+ return i_tot * 4 / w_tot;
+}
+
+EXPORT_SYMBOL_GPL(dccp_li_hist_calc_i_mean);
+
+struct dccp_li_hist_entry *dccp_li_hist_interval_new(struct dccp_li_hist *hist,
+ struct list_head *list,
+ const u64 seq_loss,
+ const u8 win_loss)
+{
+ struct dccp_li_hist_entry *tail = NULL, *entry;
+ int i;
+
+ for (i = 0; i <= DCCP_LI_HIST_IVAL_F_LENGTH; ++i) {
+ entry = dccp_li_hist_entry_new(hist, SLAB_ATOMIC);
+ if (entry == NULL) {
+ dccp_li_hist_purge(hist, list);
+ return NULL;
+ }
+ if (tail == NULL)
+ tail = entry;
+ list_add(&entry->dccplih_node, list);
+ }
+
+ entry->dccplih_seqno = seq_loss;
+ entry->dccplih_win_count = win_loss;
+ return tail;
+}
+
+EXPORT_SYMBOL_GPL(dccp_li_hist_interval_new);
diff --git a/net/dccp/ccids/lib/loss_interval.h b/net/dccp/ccids/lib/loss_interval.h
new file mode 100644
index 000000000000..13ad47ba1420
--- /dev/null
+++ b/net/dccp/ccids/lib/loss_interval.h
@@ -0,0 +1,61 @@
+#ifndef _DCCP_LI_HIST_
+#define _DCCP_LI_HIST_
+/*
+ * net/dccp/ccids/lib/loss_interval.h
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+
+#define DCCP_LI_HIST_IVAL_F_LENGTH 8
+
+struct dccp_li_hist {
+ kmem_cache_t *dccplih_slab;
+};
+
+extern struct dccp_li_hist *dccp_li_hist_new(const char *name);
+extern void dccp_li_hist_delete(struct dccp_li_hist *hist);
+
+struct dccp_li_hist_entry {
+ struct list_head dccplih_node;
+ u64 dccplih_seqno:48,
+ dccplih_win_count:4;
+ u32 dccplih_interval;
+};
+
+static inline struct dccp_li_hist_entry *
+ dccp_li_hist_entry_new(struct dccp_li_hist *hist,
+ const unsigned int __nocast prio)
+{
+ return kmem_cache_alloc(hist->dccplih_slab, prio);
+}
+
+static inline void dccp_li_hist_entry_delete(struct dccp_li_hist *hist,
+ struct dccp_li_hist_entry *entry)
+{
+ if (entry != NULL)
+ kmem_cache_free(hist->dccplih_slab, entry);
+}
+
+extern void dccp_li_hist_purge(struct dccp_li_hist *hist,
+ struct list_head *list);
+
+extern u32 dccp_li_hist_calc_i_mean(struct list_head *list);
+
+extern struct dccp_li_hist_entry *
+ dccp_li_hist_interval_new(struct dccp_li_hist *hist,
+ struct list_head *list,
+ const u64 seq_loss,
+ const u8 win_loss);
+#endif /* _DCCP_LI_HIST_ */
diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c
new file mode 100644
index 000000000000..d3f9d2053830
--- /dev/null
+++ b/net/dccp/ccids/lib/packet_history.c
@@ -0,0 +1,398 @@
+/*
+ * net/dccp/packet_history.h
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ *
+ * An implementation of the DCCP protocol
+ *
+ * This code has been developed by the University of Waikato WAND
+ * research group. For further information please see http://www.wand.net.nz/
+ * or e-mail Ian McDonald - iam4@cs.waikato.ac.nz
+ *
+ * This code also uses code from Lulea University, rereleased as GPL by its
+ * authors:
+ * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ * Changes to meet Linux coding standards, to make it meet latest ccid3 draft
+ * and to make it work as a loadable module in the DCCP stack written by
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>.
+ *
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/string.h>
+
+#include "packet_history.h"
+
+struct dccp_rx_hist *dccp_rx_hist_new(const char *name)
+{
+ struct dccp_rx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
+ static const char dccp_rx_hist_mask[] = "rx_hist_%s";
+ char *slab_name;
+
+ if (hist == NULL)
+ goto out;
+
+ slab_name = kmalloc(strlen(name) + sizeof(dccp_rx_hist_mask) - 1,
+ GFP_ATOMIC);
+ if (slab_name == NULL)
+ goto out_free_hist;
+
+ sprintf(slab_name, dccp_rx_hist_mask, name);
+ hist->dccprxh_slab = kmem_cache_create(slab_name,
+ sizeof(struct dccp_rx_hist_entry),
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+ if (hist->dccprxh_slab == NULL)
+ goto out_free_slab_name;
+out:
+ return hist;
+out_free_slab_name:
+ kfree(slab_name);
+out_free_hist:
+ kfree(hist);
+ hist = NULL;
+ goto out;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_new);
+
+void dccp_rx_hist_delete(struct dccp_rx_hist *hist)
+{
+ const char* name = kmem_cache_name(hist->dccprxh_slab);
+
+ kmem_cache_destroy(hist->dccprxh_slab);
+ kfree(name);
+ kfree(hist);
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_delete);
+
+void dccp_rx_hist_purge(struct dccp_rx_hist *hist, struct list_head *list)
+{
+ struct dccp_rx_hist_entry *entry, *next;
+
+ list_for_each_entry_safe(entry, next, list, dccphrx_node) {
+ list_del_init(&entry->dccphrx_node);
+ kmem_cache_free(hist->dccprxh_slab, entry);
+ }
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_purge);
+
+struct dccp_rx_hist_entry *
+ dccp_rx_hist_find_data_packet(const struct list_head *list)
+{
+ struct dccp_rx_hist_entry *entry, *packet = NULL;
+
+ list_for_each_entry(entry, list, dccphrx_node)
+ if (entry->dccphrx_type == DCCP_PKT_DATA ||
+ entry->dccphrx_type == DCCP_PKT_DATAACK) {
+ packet = entry;
+ break;
+ }
+
+ return packet;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_find_data_packet);
+
+int dccp_rx_hist_add_packet(struct dccp_rx_hist *hist,
+ struct list_head *rx_list,
+ struct list_head *li_list,
+ struct dccp_rx_hist_entry *packet)
+{
+ struct dccp_rx_hist_entry *entry, *next, *iter;
+ u8 num_later = 0;
+
+ iter = dccp_rx_hist_head(rx_list);
+ if (iter == NULL)
+ dccp_rx_hist_add_entry(rx_list, packet);
+ else {
+ const u64 seqno = packet->dccphrx_seqno;
+
+ if (after48(seqno, iter->dccphrx_seqno))
+ dccp_rx_hist_add_entry(rx_list, packet);
+ else {
+ if (dccp_rx_hist_entry_data_packet(iter))
+ num_later = 1;
+
+ list_for_each_entry_continue(iter, rx_list,
+ dccphrx_node) {
+ if (after48(seqno, iter->dccphrx_seqno)) {
+ dccp_rx_hist_add_entry(&iter->dccphrx_node,
+ packet);
+ goto trim_history;
+ }
+
+ if (dccp_rx_hist_entry_data_packet(iter))
+ num_later++;
+
+ if (num_later == TFRC_RECV_NUM_LATE_LOSS) {
+ dccp_rx_hist_entry_delete(hist, packet);
+ return 1;
+ }
+ }
+
+ if (num_later < TFRC_RECV_NUM_LATE_LOSS)
+ dccp_rx_hist_add_entry(rx_list, packet);
+ /*
+ * FIXME: else what? should we destroy the packet
+ * like above?
+ */
+ }
+ }
+
+trim_history:
+ /*
+ * Trim history (remove all packets after the NUM_LATE_LOSS + 1
+ * data packets)
+ */
+ num_later = TFRC_RECV_NUM_LATE_LOSS + 1;
+
+ if (!list_empty(li_list)) {
+ list_for_each_entry_safe(entry, next, rx_list, dccphrx_node) {
+ if (num_later == 0) {
+ list_del_init(&entry->dccphrx_node);
+ dccp_rx_hist_entry_delete(hist, entry);
+ } else if (dccp_rx_hist_entry_data_packet(entry))
+ --num_later;
+ }
+ } else {
+ int step = 0;
+ u8 win_count = 0; /* Not needed, but lets shut up gcc */
+ int tmp;
+ /*
+ * We have no loss interval history so we need at least one
+ * rtt:s of data packets to approximate rtt.
+ */
+ list_for_each_entry_safe(entry, next, rx_list, dccphrx_node) {
+ if (num_later == 0) {
+ switch (step) {
+ case 0:
+ step = 1;
+ /* OK, find next data packet */
+ num_later = 1;
+ break;
+ case 1:
+ step = 2;
+ /* OK, find next data packet */
+ num_later = 1;
+ win_count = entry->dccphrx_ccval;
+ break;
+ case 2:
+ tmp = win_count - entry->dccphrx_ccval;
+ if (tmp < 0)
+ tmp += TFRC_WIN_COUNT_LIMIT;
+ if (tmp > TFRC_WIN_COUNT_PER_RTT + 1) {
+ /*
+ * We have found a packet older
+ * than one rtt remove the rest
+ */
+ step = 3;
+ } else /* OK, find next data packet */
+ num_later = 1;
+ break;
+ case 3:
+ list_del_init(&entry->dccphrx_node);
+ dccp_rx_hist_entry_delete(hist, entry);
+ break;
+ }
+ } else if (dccp_rx_hist_entry_data_packet(entry))
+ --num_later;
+ }
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_add_packet);
+
+u64 dccp_rx_hist_detect_loss(struct list_head *rx_list,
+ struct list_head *li_list, u8 *win_loss)
+{
+ struct dccp_rx_hist_entry *entry, *next, *packet;
+ struct dccp_rx_hist_entry *a_loss = NULL;
+ struct dccp_rx_hist_entry *b_loss = NULL;
+ u64 seq_loss = DCCP_MAX_SEQNO + 1;
+ u8 num_later = TFRC_RECV_NUM_LATE_LOSS;
+
+ list_for_each_entry_safe(entry, next, rx_list, dccphrx_node) {
+ if (num_later == 0) {
+ b_loss = entry;
+ break;
+ } else if (dccp_rx_hist_entry_data_packet(entry))
+ --num_later;
+ }
+
+ if (b_loss == NULL)
+ goto out;
+
+ num_later = 1;
+ list_for_each_entry_safe_continue(entry, next, rx_list, dccphrx_node) {
+ if (num_later == 0) {
+ a_loss = entry;
+ break;
+ } else if (dccp_rx_hist_entry_data_packet(entry))
+ --num_later;
+ }
+
+ if (a_loss == NULL) {
+ if (list_empty(li_list)) {
+ /* no loss event have occured yet */
+ LIMIT_NETDEBUG("%s: TODO: find a lost data packet by "
+ "comparing to initial seqno\n",
+ __FUNCTION__);
+ goto out;
+ } else {
+ LIMIT_NETDEBUG("%s: Less than 4 data pkts in history!",
+ __FUNCTION__);
+ goto out;
+ }
+ }
+
+ /* Locate a lost data packet */
+ entry = packet = b_loss;
+ list_for_each_entry_safe_continue(entry, next, rx_list, dccphrx_node) {
+ u64 delta = dccp_delta_seqno(entry->dccphrx_seqno,
+ packet->dccphrx_seqno);
+
+ if (delta != 0) {
+ if (dccp_rx_hist_entry_data_packet(packet))
+ --delta;
+ /*
+ * FIXME: check this, probably this % usage is because
+ * in earlier drafts the ndp count was just 8 bits
+ * long, but now it cam be up to 24 bits long.
+ */
+#if 0
+ if (delta % DCCP_NDP_LIMIT !=
+ (packet->dccphrx_ndp -
+ entry->dccphrx_ndp) % DCCP_NDP_LIMIT)
+#endif
+ if (delta != packet->dccphrx_ndp - entry->dccphrx_ndp) {
+ seq_loss = entry->dccphrx_seqno;
+ dccp_inc_seqno(&seq_loss);
+ }
+ }
+ packet = entry;
+ if (packet == a_loss)
+ break;
+ }
+out:
+ if (seq_loss != DCCP_MAX_SEQNO + 1)
+ *win_loss = a_loss->dccphrx_ccval;
+ else
+ *win_loss = 0; /* Paranoia */
+
+ return seq_loss;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rx_hist_detect_loss);
+
+struct dccp_tx_hist *dccp_tx_hist_new(const char *name)
+{
+ struct dccp_tx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC);
+ static const char dccp_tx_hist_mask[] = "tx_hist_%s";
+ char *slab_name;
+
+ if (hist == NULL)
+ goto out;
+
+ slab_name = kmalloc(strlen(name) + sizeof(dccp_tx_hist_mask) - 1,
+ GFP_ATOMIC);
+ if (slab_name == NULL)
+ goto out_free_hist;
+
+ sprintf(slab_name, dccp_tx_hist_mask, name);
+ hist->dccptxh_slab = kmem_cache_create(slab_name,
+ sizeof(struct dccp_tx_hist_entry),
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+ if (hist->dccptxh_slab == NULL)
+ goto out_free_slab_name;
+out:
+ return hist;
+out_free_slab_name:
+ kfree(slab_name);
+out_free_hist:
+ kfree(hist);
+ hist = NULL;
+ goto out;
+}
+
+EXPORT_SYMBOL_GPL(dccp_tx_hist_new);
+
+void dccp_tx_hist_delete(struct dccp_tx_hist *hist)
+{
+ const char* name = kmem_cache_name(hist->dccptxh_slab);
+
+ kmem_cache_destroy(hist->dccptxh_slab);
+ kfree(name);
+ kfree(hist);
+}
+
+EXPORT_SYMBOL_GPL(dccp_tx_hist_delete);
+
+struct dccp_tx_hist_entry *
+ dccp_tx_hist_find_entry(const struct list_head *list, const u64 seq)
+{
+ struct dccp_tx_hist_entry *packet = NULL, *entry;
+
+ list_for_each_entry(entry, list, dccphtx_node)
+ if (entry->dccphtx_seqno == seq) {
+ packet = entry;
+ break;
+ }
+
+ return packet;
+}
+
+EXPORT_SYMBOL_GPL(dccp_tx_hist_find_entry);
+
+void dccp_tx_hist_purge_older(struct dccp_tx_hist *hist,
+ struct list_head *list,
+ struct dccp_tx_hist_entry *packet)
+{
+ struct dccp_tx_hist_entry *next;
+
+ list_for_each_entry_safe_continue(packet, next, list, dccphtx_node) {
+ list_del_init(&packet->dccphtx_node);
+ dccp_tx_hist_entry_delete(hist, packet);
+ }
+}
+
+EXPORT_SYMBOL_GPL(dccp_tx_hist_purge_older);
+
+void dccp_tx_hist_purge(struct dccp_tx_hist *hist, struct list_head *list)
+{
+ struct dccp_tx_hist_entry *entry, *next;
+
+ list_for_each_entry_safe(entry, next, list, dccphtx_node) {
+ list_del_init(&entry->dccphtx_node);
+ dccp_tx_hist_entry_delete(hist, entry);
+ }
+}
+
+EXPORT_SYMBOL_GPL(dccp_tx_hist_purge);
+
+MODULE_AUTHOR("Ian McDonald <iam4@cs.waikato.ac.nz>, "
+ "Arnaldo Carvalho de Melo <acme@ghostprotocols.net>");
+MODULE_DESCRIPTION("DCCP TFRC library");
+MODULE_LICENSE("GPL");
diff --git a/net/dccp/ccids/lib/packet_history.h b/net/dccp/ccids/lib/packet_history.h
new file mode 100644
index 000000000000..fb90a91aa93d
--- /dev/null
+++ b/net/dccp/ccids/lib/packet_history.h
@@ -0,0 +1,199 @@
+/*
+ * net/dccp/packet_history.h
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ *
+ * An implementation of the DCCP protocol
+ *
+ * This code has been developed by the University of Waikato WAND
+ * research group. For further information please see http://www.wand.net.nz/
+ * or e-mail Ian McDonald - iam4@cs.waikato.ac.nz
+ *
+ * This code also uses code from Lulea University, rereleased as GPL by its
+ * authors:
+ * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ * Changes to meet Linux coding standards, to make it meet latest ccid3 draft
+ * and to make it work as a loadable module in the DCCP stack written by
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>.
+ *
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _DCCP_PKT_HIST_
+#define _DCCP_PKT_HIST_
+
+#include <linux/config.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+
+#include "../../dccp.h"
+
+/* Number of later packets received before one is considered lost */
+#define TFRC_RECV_NUM_LATE_LOSS 3
+
+#define TFRC_WIN_COUNT_PER_RTT 4
+#define TFRC_WIN_COUNT_LIMIT 16
+
+struct dccp_tx_hist_entry {
+ struct list_head dccphtx_node;
+ u64 dccphtx_seqno:48,
+ dccphtx_ccval:4,
+ dccphtx_sent:1;
+ u32 dccphtx_rtt;
+ struct timeval dccphtx_tstamp;
+};
+
+struct dccp_rx_hist_entry {
+ struct list_head dccphrx_node;
+ u64 dccphrx_seqno:48,
+ dccphrx_ccval:4,
+ dccphrx_type:4;
+ u32 dccphrx_ndp; /* In fact it is from 8 to 24 bits */
+ struct timeval dccphrx_tstamp;
+};
+
+struct dccp_tx_hist {
+ kmem_cache_t *dccptxh_slab;
+};
+
+extern struct dccp_tx_hist *dccp_tx_hist_new(const char *name);
+extern void dccp_tx_hist_delete(struct dccp_tx_hist *hist);
+
+struct dccp_rx_hist {
+ kmem_cache_t *dccprxh_slab;
+};
+
+extern struct dccp_rx_hist *dccp_rx_hist_new(const char *name);
+extern void dccp_rx_hist_delete(struct dccp_rx_hist *hist);
+extern struct dccp_rx_hist_entry *
+ dccp_rx_hist_find_data_packet(const struct list_head *list);
+
+static inline struct dccp_tx_hist_entry *
+ dccp_tx_hist_entry_new(struct dccp_tx_hist *hist,
+ const unsigned int __nocast prio)
+{
+ struct dccp_tx_hist_entry *entry = kmem_cache_alloc(hist->dccptxh_slab,
+ prio);
+
+ if (entry != NULL)
+ entry->dccphtx_sent = 0;
+
+ return entry;
+}
+
+static inline void dccp_tx_hist_entry_delete(struct dccp_tx_hist *hist,
+ struct dccp_tx_hist_entry *entry)
+{
+ if (entry != NULL)
+ kmem_cache_free(hist->dccptxh_slab, entry);
+}
+
+extern struct dccp_tx_hist_entry *
+ dccp_tx_hist_find_entry(const struct list_head *list,
+ const u64 seq);
+
+static inline void dccp_tx_hist_add_entry(struct list_head *list,
+ struct dccp_tx_hist_entry *entry)
+{
+ list_add(&entry->dccphtx_node, list);
+}
+
+extern void dccp_tx_hist_purge_older(struct dccp_tx_hist *hist,
+ struct list_head *list,
+ struct dccp_tx_hist_entry *next);
+
+extern void dccp_tx_hist_purge(struct dccp_tx_hist *hist,
+ struct list_head *list);
+
+static inline struct dccp_tx_hist_entry *
+ dccp_tx_hist_head(struct list_head *list)
+{
+ struct dccp_tx_hist_entry *head = NULL;
+
+ if (!list_empty(list))
+ head = list_entry(list->next, struct dccp_tx_hist_entry,
+ dccphtx_node);
+ return head;
+}
+
+static inline struct dccp_rx_hist_entry *
+ dccp_rx_hist_entry_new(struct dccp_rx_hist *hist,
+ const u32 ndp,
+ const struct sk_buff *skb,
+ const unsigned int __nocast prio)
+{
+ struct dccp_rx_hist_entry *entry = kmem_cache_alloc(hist->dccprxh_slab,
+ prio);
+
+ if (entry != NULL) {
+ const struct dccp_hdr *dh = dccp_hdr(skb);
+
+ entry->dccphrx_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
+ entry->dccphrx_ccval = dh->dccph_ccval;
+ entry->dccphrx_type = dh->dccph_type;
+ entry->dccphrx_ndp = ndp;
+ do_gettimeofday(&(entry->dccphrx_tstamp));
+ }
+
+ return entry;
+}
+
+static inline void dccp_rx_hist_entry_delete(struct dccp_rx_hist *hist,
+ struct dccp_rx_hist_entry *entry)
+{
+ if (entry != NULL)
+ kmem_cache_free(hist->dccprxh_slab, entry);
+}
+
+extern void dccp_rx_hist_purge(struct dccp_rx_hist *hist,
+ struct list_head *list);
+
+static inline void dccp_rx_hist_add_entry(struct list_head *list,
+ struct dccp_rx_hist_entry *entry)
+{
+ list_add(&entry->dccphrx_node, list);
+}
+
+static inline struct dccp_rx_hist_entry *
+ dccp_rx_hist_head(struct list_head *list)
+{
+ struct dccp_rx_hist_entry *head = NULL;
+
+ if (!list_empty(list))
+ head = list_entry(list->next, struct dccp_rx_hist_entry,
+ dccphrx_node);
+ return head;
+}
+
+static inline int
+ dccp_rx_hist_entry_data_packet(const struct dccp_rx_hist_entry *entry)
+{
+ return entry->dccphrx_type == DCCP_PKT_DATA ||
+ entry->dccphrx_type == DCCP_PKT_DATAACK;
+}
+
+extern int dccp_rx_hist_add_packet(struct dccp_rx_hist *hist,
+ struct list_head *rx_list,
+ struct list_head *li_list,
+ struct dccp_rx_hist_entry *packet);
+
+extern u64 dccp_rx_hist_detect_loss(struct list_head *rx_list,
+ struct list_head *li_list, u8 *win_loss);
+
+#endif /* _DCCP_PKT_HIST_ */
diff --git a/net/dccp/ccids/lib/tfrc.h b/net/dccp/ccids/lib/tfrc.h
new file mode 100644
index 000000000000..130c4c40cfe3
--- /dev/null
+++ b/net/dccp/ccids/lib/tfrc.h
@@ -0,0 +1,22 @@
+#ifndef _TFRC_H_
+#define _TFRC_H_
+/*
+ * net/dccp/ccids/lib/tfrc.h
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/types.h>
+
+extern u32 tfrc_calc_x(u16 s, u32 R, u32 p);
+extern u32 tfrc_calc_x_reverse_lookup(u32 fvalue);
+
+#endif /* _TFRC_H_ */
diff --git a/net/dccp/ccids/lib/tfrc_equation.c b/net/dccp/ccids/lib/tfrc_equation.c
new file mode 100644
index 000000000000..d2b5933b4510
--- /dev/null
+++ b/net/dccp/ccids/lib/tfrc_equation.c
@@ -0,0 +1,644 @@
+/*
+ * net/dccp/ccids/lib/tfrc_equation.c
+ *
+ * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <asm/bug.h>
+#include <asm/div64.h>
+
+#include "tfrc.h"
+
+#define TFRC_CALC_X_ARRSIZE 500
+
+#define TFRC_CALC_X_SPLIT 50000
+/* equivalent to 0.05 */
+
+static const u32 tfrc_calc_x_lookup[TFRC_CALC_X_ARRSIZE][2] = {
+ { 37172, 8172 },
+ { 53499, 11567 },
+ { 66664, 14180 },
+ { 78298, 16388 },
+ { 89021, 18339 },
+ { 99147, 20108 },
+ { 108858, 21738 },
+ { 118273, 23260 },
+ { 127474, 24693 },
+ { 136520, 26052 },
+ { 145456, 27348 },
+ { 154316, 28589 },
+ { 163130, 29783 },
+ { 171919, 30935 },
+ { 180704, 32049 },
+ { 189502, 33130 },
+ { 198328, 34180 },
+ { 207194, 35202 },
+ { 216114, 36198 },
+ { 225097, 37172 },
+ { 234153, 38123 },
+ { 243294, 39055 },
+ { 252527, 39968 },
+ { 261861, 40864 },
+ { 271305, 41743 },
+ { 280866, 42607 },
+ { 290553, 43457 },
+ { 300372, 44293 },
+ { 310333, 45117 },
+ { 320441, 45929 },
+ { 330705, 46729 },
+ { 341131, 47518 },
+ { 351728, 48297 },
+ { 362501, 49066 },
+ { 373460, 49826 },
+ { 384609, 50577 },
+ { 395958, 51320 },
+ { 407513, 52054 },
+ { 419281, 52780 },
+ { 431270, 53499 },
+ { 443487, 54211 },
+ { 455940, 54916 },
+ { 468635, 55614 },
+ { 481581, 56306 },
+ { 494785, 56991 },
+ { 508254, 57671 },
+ { 521996, 58345 },
+ { 536019, 59014 },
+ { 550331, 59677 },
+ { 564939, 60335 },
+ { 579851, 60988 },
+ { 595075, 61636 },
+ { 610619, 62279 },
+ { 626491, 62918 },
+ { 642700, 63553 },
+ { 659253, 64183 },
+ { 676158, 64809 },
+ { 693424, 65431 },
+ { 711060, 66050 },
+ { 729073, 66664 },
+ { 747472, 67275 },
+ { 766266, 67882 },
+ { 785464, 68486 },
+ { 805073, 69087 },
+ { 825103, 69684 },
+ { 845562, 70278 },
+ { 866460, 70868 },
+ { 887805, 71456 },
+ { 909606, 72041 },
+ { 931873, 72623 },
+ { 954614, 73202 },
+ { 977839, 73778 },
+ { 1001557, 74352 },
+ { 1025777, 74923 },
+ { 1050508, 75492 },
+ { 1075761, 76058 },
+ { 1101544, 76621 },
+ { 1127867, 77183 },
+ { 1154739, 77741 },
+ { 1182172, 78298 },
+ { 1210173, 78852 },
+ { 1238753, 79405 },
+ { 1267922, 79955 },
+ { 1297689, 80503 },
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+ { 1359060, 81593 },
+ { 1390684, 82135 },
+ { 1422947, 82675 },
+ { 1455859, 83213 },
+ { 1489430, 83750 },
+ { 1523671, 84284 },
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+ { 1630518, 85878 },
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+ { 1705290, 86932 },
+ { 1743770, 87457 },
+ { 1782994, 87980 },
+ { 1822973, 88501 },
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+ { 1905237, 89540 },
+ { 1947545, 90057 },
+ { 1990650, 90573 },
+ { 2034566, 91087 },
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+ { 2124869, 92111 },
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+ { 2218543, 93131 },
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+ { 2365575, 94650 },
+ { 2416371, 95154 },
+ { 2468077, 95657 },
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+ { 2574271, 96660 },
+ { 2628782, 97159 },
+ { 2684250, 97658 },
+ { 2740689, 98155 },
+ { 2798110, 98651 },
+ { 2856524, 99147 },
+ { 2915944, 99641 },
+ { 2976382, 100134 },
+ { 3037850, 100626 },
+ { 3100360, 101117 },
+ { 3163924, 101608 },
+ { 3228554, 102097 },
+ { 3294263, 102586 },
+ { 3361063, 103073 },
+ { 3428966, 103560 },
+ { 3497984, 104045 },
+ { 3568131, 104530 },
+ { 3639419, 105014 },
+ { 3711860, 105498 },
+ { 3785467, 105980 },
+ { 3860253, 106462 },
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+ { 4091808, 107902 },
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+ { 4252306, 108858 },
+ { 4334431, 109335 },
+ { 4417825, 109811 },
+ { 4502501, 110287 },
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+ { 4675750, 111236 },
+ { 4764349, 111709 },
+ { 4854283, 112182 },
+ { 4945564, 112654 },
+ { 5038206, 113126 },
+ { 5132223, 113597 },
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+ { 5324432, 114537 },
+ { 5422652, 115006 },
+ { 5522299, 115474 },
+ { 5623389, 115942 },
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+ { 5829948, 116876 },
+ { 5935446, 117342 },
+ { 6042439, 117808 },
+ { 6150943, 118273 },
+ { 6260972, 118738 },
+ { 6372538, 119202 },
+ { 6485657, 119665 },
+ { 6600342, 120128 },
+ { 6716607, 120591 },
+ { 6834467, 121053 },
+ { 6953935, 121514 },
+ { 7075025, 121976 },
+ { 7197752, 122436 },
+ { 7322131, 122896 },
+ { 7448175, 123356 },
+ { 7575898, 123815 },
+ { 7705316, 124274 },
+ { 7836442, 124733 },
+ { 7969291, 125191 },
+ { 8103877, 125648 },
+ { 8240216, 126105 },
+ { 8378321, 126562 },
+ { 8518208, 127018 },
+ { 8659890, 127474 },
+ { 8803384, 127930 },
+ { 8948702, 128385 },
+ { 9095861, 128840 },
+ { 9244875, 129294 },
+ { 9395760, 129748 },
+ { 9548529, 130202 },
+ { 9703198, 130655 },
+ { 9859782, 131108 },
+ { 10018296, 131561 },
+ { 10178755, 132014 },
+ { 10341174, 132466 },
+ { 10505569, 132917 },
+ { 10671954, 133369 },
+ { 10840345, 133820 },
+ { 11010757, 134271 },
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+ { 11893673, 136520 },
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+ { 12448664, 137867 },
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+ { 13819999, 140999 },
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+ { 15302632, 144121 },
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+ { 15973479, 145456 },
+ { 16201939, 145900 },
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+ { 16666221, 146789 },
+ { 16902076, 147233 },
+ { 17140429, 147677 },
+ { 17381297, 148121 },
+ { 17624696, 148564 },
+ { 17870643, 149007 },
+ { 18119154, 149451 },
+ { 18370247, 149894 },
+ { 18623936, 150336 },
+ { 18880241, 150779 },
+ { 19139176, 151222 },
+ { 19400759, 151664 },
+ { 19665007, 152107 },
+ { 19931936, 152549 },
+ { 20201564, 152991 },
+ { 20473907, 153433 },
+ { 20748982, 153875 },
+ { 21026807, 154316 },
+ { 21307399, 154758 },
+ { 21590773, 155199 },
+ { 21876949, 155641 },
+ { 22165941, 156082 },
+ { 22457769, 156523 },
+ { 22752449, 156964 },
+ { 23049999, 157405 },
+ { 23350435, 157846 },
+ { 23653774, 158287 },
+ { 23960036, 158727 },
+ { 24269236, 159168 },
+ { 24581392, 159608 },
+ { 24896521, 160049 },
+ { 25214642, 160489 },
+ { 25535772, 160929 },
+ { 25859927, 161370 },
+ { 26187127, 161810 },
+ { 26517388, 162250 },
+ { 26850728, 162690 },
+ { 27187165, 163130 },
+ { 27526716, 163569 },
+ { 27869400, 164009 },
+ { 28215234, 164449 },
+ { 28564236, 164889 },
+ { 28916423, 165328 },
+ { 29271815, 165768 },
+ { 29630428, 166208 },
+ { 29992281, 166647 },
+ { 30357392, 167087 },
+ { 30725779, 167526 },
+ { 31097459, 167965 },
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+ { 31850774, 168844 },
+ { 32232445, 169283 },
+ { 32617482, 169723 },
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+ { 35408544, 172797 },
+ { 35821174, 173237 },
+ { 36237335, 173676 },
+ { 36657047, 174115 },
+ { 37080329, 174554 },
+ { 37507197, 174993 },
+ { 37937673, 175433 },
+ { 38371773, 175872 },
+ { 38809517, 176311 },
+ { 39250924, 176750 },
+ { 39696012, 177190 },
+ { 40144800, 177629 },
+ { 40597308, 178068 },
+ { 41053553, 178507 },
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+ { 53174435, 189062 },
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+ { 55996633, 191265 },
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+ { 58332014, 193028 },
+ { 58926806, 193470 },
+ { 59526017, 193911 },
+ { 60129666, 194352 },
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+ { 61967446, 195677 },
+ { 62589050, 196118 },
+ { 63215194, 196560 },
+ { 63845897, 197002 },
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+ { 65121061, 197886 },
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+ { 69058085, 200540 },
+ { 69730735, 200983 },
+ { 70408147, 201426 },
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+ { 238346244, 269881 },
+ { 239994613, 270355 },
+ { 241651183, 270830 },
+ { 243315981, 271305 }
+};
+
+/* Calculate the send rate as per section 3.1 of RFC3448
+
+Returns send rate in bytes per second
+
+Integer maths and lookups are used as not allowed floating point in kernel
+
+The function for Xcalc as per section 3.1 of RFC3448 is:
+
+X = s
+ -------------------------------------------------------------
+ R*sqrt(2*b*p/3) + (t_RTO * (3*sqrt(3*b*p/8) * p * (1+32*p^2)))
+
+where
+X is the trasmit rate in bytes/second
+s is the packet size in bytes
+R is the round trip time in seconds
+p is the loss event rate, between 0 and 1.0, of the number of loss events
+ as a fraction of the number of packets transmitted
+t_RTO is the TCP retransmission timeout value in seconds
+b is the number of packets acknowledged by a single TCP acknowledgement
+
+we can assume that b = 1 and t_RTO is 4 * R. With this the equation becomes:
+
+X = s
+ -----------------------------------------------------------------------
+ R * sqrt(2 * p / 3) + (12 * R * (sqrt(3 * p / 8) * p * (1 + 32 * p^2)))
+
+
+which we can break down into:
+
+X = s
+ --------
+ R * f(p)
+
+where f(p) = sqrt(2 * p / 3) + (12 * sqrt(3 * p / 8) * p * (1 + 32 * p * p))
+
+Function parameters:
+s - bytes
+R - RTT in usecs
+p - loss rate (decimal fraction multiplied by 1,000,000)
+
+Returns Xcalc in bytes per second
+
+DON'T alter this code unless you run test cases against it as the code
+has been manipulated to stop underflow/overlow.
+
+*/
+u32 tfrc_calc_x(u16 s, u32 R, u32 p)
+{
+ int index;
+ u32 f;
+ u64 tmp1, tmp2;
+
+ if (p < TFRC_CALC_X_SPLIT)
+ index = (p / (TFRC_CALC_X_SPLIT / TFRC_CALC_X_ARRSIZE)) - 1;
+ else
+ index = (p / (1000000 / TFRC_CALC_X_ARRSIZE)) - 1;
+
+ if (index < 0)
+ /* p should be 0 unless there is a bug in my code */
+ index = 0;
+
+ if (R == 0)
+ R = 1; /* RTT can't be zero or else divide by zero */
+
+ BUG_ON(index >= TFRC_CALC_X_ARRSIZE);
+
+ if (p >= TFRC_CALC_X_SPLIT)
+ f = tfrc_calc_x_lookup[index][0];
+ else
+ f = tfrc_calc_x_lookup[index][1];
+
+ tmp1 = ((u64)s * 100000000);
+ tmp2 = ((u64)R * (u64)f);
+ do_div(tmp2, 10000);
+ do_div(tmp1, tmp2);
+ /* Don't alter above math unless you test due to overflow on 32 bit */
+
+ return (u32)tmp1;
+}
+
+EXPORT_SYMBOL_GPL(tfrc_calc_x);
+
+/*
+ * args: fvalue - function value to match
+ * returns: p closest to that value
+ *
+ * both fvalue and p are multiplied by 1,000,000 to use ints
+ */
+u32 tfrc_calc_x_reverse_lookup(u32 fvalue)
+{
+ int ctr = 0;
+ int small;
+
+ if (fvalue < tfrc_calc_x_lookup[0][1])
+ return 0;
+
+ if (fvalue <= tfrc_calc_x_lookup[TFRC_CALC_X_ARRSIZE - 1][1])
+ small = 1;
+ else if (fvalue > tfrc_calc_x_lookup[TFRC_CALC_X_ARRSIZE - 1][0])
+ return 1000000;
+ else
+ small = 0;
+
+ while (fvalue > tfrc_calc_x_lookup[ctr][small])
+ ctr++;
+
+ if (small)
+ return TFRC_CALC_X_SPLIT * ctr / TFRC_CALC_X_ARRSIZE;
+ else
+ return 1000000 * ctr / TFRC_CALC_X_ARRSIZE;
+}
+
+EXPORT_SYMBOL_GPL(tfrc_calc_x_reverse_lookup);
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
new file mode 100644
index 000000000000..33456c0d5937
--- /dev/null
+++ b/net/dccp/dccp.h
@@ -0,0 +1,493 @@
+#ifndef _DCCP_H
+#define _DCCP_H
+/*
+ * net/dccp/dccp.h
+ *
+ * An implementation of the DCCP protocol
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <net/snmp.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+
+#ifdef CONFIG_IP_DCCP_DEBUG
+extern int dccp_debug;
+
+#define dccp_pr_debug(format, a...) \
+ do { if (dccp_debug) \
+ printk(KERN_DEBUG "%s: " format, __FUNCTION__ , ##a); \
+ } while (0)
+#define dccp_pr_debug_cat(format, a...) do { if (dccp_debug) \
+ printk(format, ##a); } while (0)
+#else
+#define dccp_pr_debug(format, a...)
+#define dccp_pr_debug_cat(format, a...)
+#endif
+
+extern struct inet_hashinfo dccp_hashinfo;
+
+extern atomic_t dccp_orphan_count;
+extern int dccp_tw_count;
+extern void dccp_tw_deschedule(struct inet_timewait_sock *tw);
+
+extern void dccp_time_wait(struct sock *sk, int state, int timeo);
+
+/* FIXME: Right size this */
+#define DCCP_MAX_OPT_LEN 128
+
+#define DCCP_MAX_PACKET_HDR 32
+
+#define MAX_DCCP_HEADER (DCCP_MAX_PACKET_HDR + DCCP_MAX_OPT_LEN + MAX_HEADER)
+
+#define DCCP_TIMEWAIT_LEN (60 * HZ) /* how long to wait to destroy TIME-WAIT
+ * state, about 60 seconds */
+
+/* draft-ietf-dccp-spec-11.txt initial RTO value */
+#define DCCP_TIMEOUT_INIT ((unsigned)(3 * HZ))
+
+/* Maximal interval between probes for local resources. */
+#define DCCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ / 2U))
+
+#define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */
+
+extern struct proto dccp_v4_prot;
+
+/* is seq1 < seq2 ? */
+static inline int before48(const u64 seq1, const u64 seq2)
+{
+ return (s64)((seq1 << 16) - (seq2 << 16)) < 0;
+}
+
+/* is seq1 > seq2 ? */
+static inline int after48(const u64 seq1, const u64 seq2)
+{
+ return (s64)((seq2 << 16) - (seq1 << 16)) < 0;
+}
+
+/* is seq2 <= seq1 <= seq3 ? */
+static inline int between48(const u64 seq1, const u64 seq2, const u64 seq3)
+{
+ return (seq3 << 16) - (seq2 << 16) >= (seq1 << 16) - (seq2 << 16);
+}
+
+static inline u64 max48(const u64 seq1, const u64 seq2)
+{
+ return after48(seq1, seq2) ? seq1 : seq2;
+}
+
+enum {
+ DCCP_MIB_NUM = 0,
+ DCCP_MIB_ACTIVEOPENS, /* ActiveOpens */
+ DCCP_MIB_ESTABRESETS, /* EstabResets */
+ DCCP_MIB_CURRESTAB, /* CurrEstab */
+ DCCP_MIB_OUTSEGS, /* OutSegs */
+ DCCP_MIB_OUTRSTS,
+ DCCP_MIB_ABORTONTIMEOUT,
+ DCCP_MIB_TIMEOUTS,
+ DCCP_MIB_ABORTFAILED,
+ DCCP_MIB_PASSIVEOPENS,
+ DCCP_MIB_ATTEMPTFAILS,
+ DCCP_MIB_OUTDATAGRAMS,
+ DCCP_MIB_INERRS,
+ DCCP_MIB_OPTMANDATORYERROR,
+ DCCP_MIB_INVALIDOPT,
+ __DCCP_MIB_MAX
+};
+
+#define DCCP_MIB_MAX __DCCP_MIB_MAX
+struct dccp_mib {
+ unsigned long mibs[DCCP_MIB_MAX];
+} __SNMP_MIB_ALIGN__;
+
+DECLARE_SNMP_STAT(struct dccp_mib, dccp_statistics);
+#define DCCP_INC_STATS(field) SNMP_INC_STATS(dccp_statistics, field)
+#define DCCP_INC_STATS_BH(field) SNMP_INC_STATS_BH(dccp_statistics, field)
+#define DCCP_INC_STATS_USER(field) SNMP_INC_STATS_USER(dccp_statistics, field)
+#define DCCP_DEC_STATS(field) SNMP_DEC_STATS(dccp_statistics, field)
+#define DCCP_ADD_STATS_BH(field, val) \
+ SNMP_ADD_STATS_BH(dccp_statistics, field, val)
+#define DCCP_ADD_STATS_USER(field, val) \
+ SNMP_ADD_STATS_USER(dccp_statistics, field, val)
+
+extern int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb);
+extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
+
+extern int dccp_send_response(struct sock *sk);
+extern void dccp_send_ack(struct sock *sk);
+extern void dccp_send_delayed_ack(struct sock *sk);
+extern void dccp_send_sync(struct sock *sk, const u64 seq,
+ const enum dccp_pkt_type pkt_type);
+
+extern int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo);
+extern void dccp_write_space(struct sock *sk);
+
+extern void dccp_init_xmit_timers(struct sock *sk);
+static inline void dccp_clear_xmit_timers(struct sock *sk)
+{
+ inet_csk_clear_xmit_timers(sk);
+}
+
+extern unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu);
+
+extern const char *dccp_packet_name(const int type);
+extern const char *dccp_state_name(const int state);
+
+static inline void dccp_set_state(struct sock *sk, const int state)
+{
+ const int oldstate = sk->sk_state;
+
+ dccp_pr_debug("%s(%p) %-10.10s -> %s\n",
+ dccp_role(sk), sk,
+ dccp_state_name(oldstate), dccp_state_name(state));
+ WARN_ON(state == oldstate);
+
+ switch (state) {
+ case DCCP_OPEN:
+ if (oldstate != DCCP_OPEN)
+ DCCP_INC_STATS(DCCP_MIB_CURRESTAB);
+ break;
+
+ case DCCP_CLOSED:
+ if (oldstate == DCCP_CLOSING || oldstate == DCCP_OPEN)
+ DCCP_INC_STATS(DCCP_MIB_ESTABRESETS);
+
+ sk->sk_prot->unhash(sk);
+ if (inet_csk(sk)->icsk_bind_hash != NULL &&
+ !(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
+ inet_put_port(&dccp_hashinfo, sk);
+ /* fall through */
+ default:
+ if (oldstate == DCCP_OPEN)
+ DCCP_DEC_STATS(DCCP_MIB_CURRESTAB);
+ }
+
+ /* Change state AFTER socket is unhashed to avoid closed
+ * socket sitting in hash tables.
+ */
+ sk->sk_state = state;
+}
+
+static inline void dccp_done(struct sock *sk)
+{
+ dccp_set_state(sk, DCCP_CLOSED);
+ dccp_clear_xmit_timers(sk);
+
+ sk->sk_shutdown = SHUTDOWN_MASK;
+
+ if (!sock_flag(sk, SOCK_DEAD))
+ sk->sk_state_change(sk);
+ else
+ inet_csk_destroy_sock(sk);
+}
+
+static inline void dccp_openreq_init(struct request_sock *req,
+ struct dccp_sock *dp,
+ struct sk_buff *skb)
+{
+ /*
+ * FIXME: fill in the other req fields from the DCCP options
+ * received
+ */
+ inet_rsk(req)->rmt_port = dccp_hdr(skb)->dccph_sport;
+ inet_rsk(req)->acked = 0;
+ req->rcv_wnd = 0;
+}
+
+extern int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
+
+extern struct sock *dccp_create_openreq_child(struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb);
+
+extern int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
+
+extern void dccp_v4_err(struct sk_buff *skb, u32);
+
+extern int dccp_v4_rcv(struct sk_buff *skb);
+
+extern struct sock *dccp_v4_request_recv_sock(struct sock *sk,
+ struct sk_buff *skb,
+ struct request_sock *req,
+ struct dst_entry *dst);
+extern struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *req,
+ struct request_sock **prev);
+
+extern int dccp_child_process(struct sock *parent, struct sock *child,
+ struct sk_buff *skb);
+extern int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
+ struct dccp_hdr *dh, unsigned len);
+extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+ const struct dccp_hdr *dh, const unsigned len);
+
+extern void dccp_close(struct sock *sk, long timeout);
+extern struct sk_buff *dccp_make_response(struct sock *sk,
+ struct dst_entry *dst,
+ struct request_sock *req);
+extern struct sk_buff *dccp_make_reset(struct sock *sk,
+ struct dst_entry *dst,
+ enum dccp_reset_codes code);
+
+extern int dccp_connect(struct sock *sk);
+extern int dccp_disconnect(struct sock *sk, int flags);
+extern int dccp_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+extern int dccp_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen);
+extern int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
+extern int dccp_sendmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t size);
+extern int dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t len, int nonblock,
+ int flags, int *addr_len);
+extern void dccp_shutdown(struct sock *sk, int how);
+
+extern int dccp_v4_checksum(const struct sk_buff *skb,
+ const u32 saddr, const u32 daddr);
+
+extern int dccp_v4_send_reset(struct sock *sk,
+ enum dccp_reset_codes code);
+extern void dccp_send_close(struct sock *sk, const int active);
+
+struct dccp_skb_cb {
+ __u8 dccpd_type;
+ __u8 dccpd_reset_code;
+ __u8 dccpd_service;
+ __u8 dccpd_ccval;
+ __u64 dccpd_seq;
+ __u64 dccpd_ack_seq;
+ int dccpd_opt_len;
+};
+
+#define DCCP_SKB_CB(__skb) ((struct dccp_skb_cb *)&((__skb)->cb[0]))
+
+static inline int dccp_non_data_packet(const struct sk_buff *skb)
+{
+ const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
+
+ return type == DCCP_PKT_ACK ||
+ type == DCCP_PKT_CLOSE ||
+ type == DCCP_PKT_CLOSEREQ ||
+ type == DCCP_PKT_RESET ||
+ type == DCCP_PKT_SYNC ||
+ type == DCCP_PKT_SYNCACK;
+}
+
+static inline int dccp_packet_without_ack(const struct sk_buff *skb)
+{
+ const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
+
+ return type == DCCP_PKT_DATA || type == DCCP_PKT_REQUEST;
+}
+
+#define DCCP_MAX_SEQNO ((((u64)1) << 48) - 1)
+#define DCCP_PKT_WITHOUT_ACK_SEQ (DCCP_MAX_SEQNO << 2)
+
+static inline void dccp_set_seqno(u64 *seqno, u64 value)
+{
+ if (value > DCCP_MAX_SEQNO)
+ value -= DCCP_MAX_SEQNO + 1;
+ *seqno = value;
+}
+
+static inline u64 dccp_delta_seqno(u64 seqno1, u64 seqno2)
+{
+ return ((seqno2 << 16) - (seqno1 << 16)) >> 16;
+}
+
+static inline void dccp_inc_seqno(u64 *seqno)
+{
+ if (++*seqno > DCCP_MAX_SEQNO)
+ *seqno = 0;
+}
+
+static inline void dccp_hdr_set_seq(struct dccp_hdr *dh, const u64 gss)
+{
+ struct dccp_hdr_ext *dhx = (struct dccp_hdr_ext *)((void *)dh +
+ sizeof(*dh));
+
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ dh->dccph_seq = htonl((gss >> 32)) >> 8;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ dh->dccph_seq = htonl((gss >> 32));
+#else
+#error "Adjust your <asm/byteorder.h> defines"
+#endif
+ dhx->dccph_seq_low = htonl(gss & 0xffffffff);
+}
+
+static inline void dccp_hdr_set_ack(struct dccp_hdr_ack_bits *dhack,
+ const u64 gsr)
+{
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ dhack->dccph_ack_nr_high = htonl((gsr >> 32)) >> 8;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ dhack->dccph_ack_nr_high = htonl((gsr >> 32));
+#else
+#error "Adjust your <asm/byteorder.h> defines"
+#endif
+ dhack->dccph_ack_nr_low = htonl(gsr & 0xffffffff);
+}
+
+static inline void dccp_update_gsr(struct sock *sk, u64 seq)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ dp->dccps_gsr = seq;
+ dccp_set_seqno(&dp->dccps_swl,
+ (dp->dccps_gsr + 1 -
+ (dp->dccps_options.dccpo_sequence_window / 4)));
+ dccp_set_seqno(&dp->dccps_swh,
+ (dp->dccps_gsr +
+ (3 * dp->dccps_options.dccpo_sequence_window) / 4));
+}
+
+static inline void dccp_update_gss(struct sock *sk, u64 seq)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ dp->dccps_awh = dp->dccps_gss = seq;
+ dccp_set_seqno(&dp->dccps_awl,
+ (dp->dccps_gss -
+ dp->dccps_options.dccpo_sequence_window + 1));
+}
+
+extern void dccp_insert_options(struct sock *sk, struct sk_buff *skb);
+extern void dccp_insert_option_elapsed_time(struct sock *sk,
+ struct sk_buff *skb,
+ u32 elapsed_time);
+extern void dccp_insert_option_timestamp(struct sock *sk,
+ struct sk_buff *skb);
+extern void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
+ unsigned char option,
+ const void *value, unsigned char len);
+
+extern struct socket *dccp_ctl_socket;
+
+#define DCCP_ACKPKTS_STATE_RECEIVED 0
+#define DCCP_ACKPKTS_STATE_ECN_MARKED (1 << 6)
+#define DCCP_ACKPKTS_STATE_NOT_RECEIVED (3 << 6)
+
+#define DCCP_ACKPKTS_STATE_MASK 0xC0 /* 11000000 */
+#define DCCP_ACKPKTS_LEN_MASK 0x3F /* 00111111 */
+
+/** struct dccp_ackpkts - acknowledgeable packets
+ *
+ * This data structure is the one defined in the DCCP draft
+ * Appendix A.
+ *
+ * @dccpap_buf_head - circular buffer head
+ * @dccpap_buf_tail - circular buffer tail
+ * @dccpap_buf_ackno - ack # of the most recent packet acknowledgeable in the
+ * buffer (i.e. %dccpap_buf_head)
+ * @dccpap_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
+ * by the buffer with State 0
+ *
+ * Additionally, the HC-Receiver must keep some information about the
+ * Ack Vectors it has recently sent. For each packet sent carrying an
+ * Ack Vector, it remembers four variables:
+ *
+ * @dccpap_ack_seqno - the Sequence Number used for the packet
+ * (HC-Receiver seqno)
+ * @dccpap_ack_ptr - the value of buf_head at the time of acknowledgement.
+ * @dccpap_ack_ackno - the Acknowledgement Number used for the packet
+ * (HC-Sender seqno)
+ * @dccpap_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
+ *
+ * @dccpap_buf_len - circular buffer length
+ * @dccpap_time - the time in usecs
+ * @dccpap_buf - circular buffer of acknowledgeable packets
+ */
+struct dccp_ackpkts {
+ unsigned int dccpap_buf_head;
+ unsigned int dccpap_buf_tail;
+ u64 dccpap_buf_ackno;
+ u64 dccpap_ack_seqno;
+ u64 dccpap_ack_ackno;
+ unsigned int dccpap_ack_ptr;
+ unsigned int dccpap_buf_vector_len;
+ unsigned int dccpap_ack_vector_len;
+ unsigned int dccpap_buf_len;
+ struct timeval dccpap_time;
+ u8 dccpap_buf_nonce;
+ u8 dccpap_ack_nonce;
+ u8 dccpap_buf[0];
+};
+
+extern struct dccp_ackpkts *
+ dccp_ackpkts_alloc(unsigned int len,
+ const unsigned int __nocast priority);
+extern void dccp_ackpkts_free(struct dccp_ackpkts *ap);
+extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state);
+extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
+ struct sock *sk, u64 ackno);
+
+static inline suseconds_t timeval_usecs(const struct timeval *tv)
+{
+ return tv->tv_sec * USEC_PER_SEC + tv->tv_usec;
+}
+
+static inline suseconds_t timeval_delta(const struct timeval *large,
+ const struct timeval *small)
+{
+ time_t secs = large->tv_sec - small->tv_sec;
+ suseconds_t usecs = large->tv_usec - small->tv_usec;
+
+ if (usecs < 0) {
+ secs--;
+ usecs += USEC_PER_SEC;
+ }
+ return secs * USEC_PER_SEC + usecs;
+}
+
+static inline void timeval_add_usecs(struct timeval *tv,
+ const suseconds_t usecs)
+{
+ tv->tv_usec += usecs;
+ while (tv->tv_usec >= USEC_PER_SEC) {
+ tv->tv_sec++;
+ tv->tv_usec -= USEC_PER_SEC;
+ }
+}
+
+static inline void timeval_sub_usecs(struct timeval *tv,
+ const suseconds_t usecs)
+{
+ tv->tv_usec -= usecs;
+ while (tv->tv_usec < 0) {
+ tv->tv_sec--;
+ tv->tv_usec += USEC_PER_SEC;
+ }
+}
+
+/*
+ * Returns the difference in usecs between timeval
+ * passed in and current time
+ */
+static inline suseconds_t timeval_now_delta(const struct timeval *tv)
+{
+ struct timeval now;
+ do_gettimeofday(&now);
+ return timeval_delta(&now, tv);
+}
+
+#ifdef CONFIG_IP_DCCP_DEBUG
+extern void dccp_ackvector_print(const u64 ackno,
+ const unsigned char *vector, int len);
+extern void dccp_ackpkts_print(const struct dccp_ackpkts *ap);
+#else
+static inline void dccp_ackvector_print(const u64 ackno,
+ const unsigned char *vector,
+ int len) { }
+static inline void dccp_ackpkts_print(const struct dccp_ackpkts *ap) { }
+#endif
+
+#endif /* _DCCP_H */
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
new file mode 100644
index 000000000000..f675d8e642d3
--- /dev/null
+++ b/net/dccp/diag.c
@@ -0,0 +1,71 @@
+/*
+ * net/dccp/diag.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@mandriva.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+#include <linux/inet_diag.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+static void dccp_get_info(struct sock *sk, struct tcp_info *info)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+
+ memset(info, 0, sizeof(*info));
+
+ info->tcpi_state = sk->sk_state;
+ info->tcpi_retransmits = icsk->icsk_retransmits;
+ info->tcpi_probes = icsk->icsk_probes_out;
+ info->tcpi_backoff = icsk->icsk_backoff;
+ info->tcpi_pmtu = dp->dccps_pmtu_cookie;
+
+ if (dp->dccps_options.dccpo_send_ack_vector)
+ info->tcpi_options |= TCPI_OPT_SACK;
+
+ ccid_hc_rx_get_info(dp->dccps_hc_rx_ccid, sk, info);
+ ccid_hc_tx_get_info(dp->dccps_hc_tx_ccid, sk, info);
+}
+
+static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
+ void *_info)
+{
+ r->idiag_rqueue = r->idiag_wqueue = 0;
+
+ if (_info != NULL)
+ dccp_get_info(sk, _info);
+}
+
+static struct inet_diag_handler dccp_diag_handler = {
+ .idiag_hashinfo = &dccp_hashinfo,
+ .idiag_get_info = dccp_diag_get_info,
+ .idiag_type = DCCPDIAG_GETSOCK,
+ .idiag_info_size = sizeof(struct tcp_info),
+};
+
+static int __init dccp_diag_init(void)
+{
+ return inet_diag_register(&dccp_diag_handler);
+}
+
+static void __exit dccp_diag_fini(void)
+{
+ inet_diag_unregister(&dccp_diag_handler);
+}
+
+module_init(dccp_diag_init);
+module_exit(dccp_diag_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
+MODULE_DESCRIPTION("DCCP inet_diag handler");
diff --git a/net/dccp/input.c b/net/dccp/input.c
new file mode 100644
index 000000000000..ef29cef1dafe
--- /dev/null
+++ b/net/dccp/input.c
@@ -0,0 +1,600 @@
+/*
+ * net/dccp/input.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/skbuff.h>
+
+#include <net/sock.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+static void dccp_fin(struct sock *sk, struct sk_buff *skb)
+{
+ sk->sk_shutdown |= RCV_SHUTDOWN;
+ sock_set_flag(sk, SOCK_DONE);
+ __skb_pull(skb, dccp_hdr(skb)->dccph_doff * 4);
+ __skb_queue_tail(&sk->sk_receive_queue, skb);
+ skb_set_owner_r(skb, sk);
+ sk->sk_data_ready(sk, 0);
+}
+
+static void dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
+{
+ dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED);
+ dccp_fin(sk, skb);
+ dccp_set_state(sk, DCCP_CLOSED);
+ sk_wake_async(sk, 1, POLL_HUP);
+}
+
+static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb)
+{
+ /*
+ * Step 7: Check for unexpected packet types
+ * If (S.is_server and P.type == CloseReq)
+ * Send Sync packet acknowledging P.seqno
+ * Drop packet and return
+ */
+ if (dccp_sk(sk)->dccps_role != DCCP_ROLE_CLIENT) {
+ dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq, DCCP_PKT_SYNC);
+ return;
+ }
+
+ dccp_set_state(sk, DCCP_CLOSING);
+ dccp_send_close(sk, 0);
+}
+
+static inline void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ if (dp->dccps_options.dccpo_send_ack_vector)
+ dccp_ackpkts_check_rcv_ackno(dp->dccps_hc_rx_ackpkts, sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
+}
+
+static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
+{
+ const struct dccp_hdr *dh = dccp_hdr(skb);
+ struct dccp_sock *dp = dccp_sk(sk);
+ u64 lswl, lawl;
+
+ /*
+ * Step 5: Prepare sequence numbers for Sync
+ * If P.type == Sync or P.type == SyncAck,
+ * If S.AWL <= P.ackno <= S.AWH and P.seqno >= S.SWL,
+ * / * P is valid, so update sequence number variables
+ * accordingly. After this update, P will pass the tests
+ * in Step 6. A SyncAck is generated if necessary in
+ * Step 15 * /
+ * Update S.GSR, S.SWL, S.SWH
+ * Otherwise,
+ * Drop packet and return
+ */
+ if (dh->dccph_type == DCCP_PKT_SYNC ||
+ dh->dccph_type == DCCP_PKT_SYNCACK) {
+ if (between48(DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ dp->dccps_awl, dp->dccps_awh) &&
+ !before48(DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_swl))
+ dccp_update_gsr(sk, DCCP_SKB_CB(skb)->dccpd_seq);
+ else
+ return -1;
+ }
+
+ /*
+ * Step 6: Check sequence numbers
+ * Let LSWL = S.SWL and LAWL = S.AWL
+ * If P.type == CloseReq or P.type == Close or P.type == Reset,
+ * LSWL := S.GSR + 1, LAWL := S.GAR
+ * If LSWL <= P.seqno <= S.SWH
+ * and (P.ackno does not exist or LAWL <= P.ackno <= S.AWH),
+ * Update S.GSR, S.SWL, S.SWH
+ * If P.type != Sync,
+ * Update S.GAR
+ * Otherwise,
+ * Send Sync packet acknowledging P.seqno
+ * Drop packet and return
+ */
+ lswl = dp->dccps_swl;
+ lawl = dp->dccps_awl;
+
+ if (dh->dccph_type == DCCP_PKT_CLOSEREQ ||
+ dh->dccph_type == DCCP_PKT_CLOSE ||
+ dh->dccph_type == DCCP_PKT_RESET) {
+ lswl = dp->dccps_gsr;
+ dccp_inc_seqno(&lswl);
+ lawl = dp->dccps_gar;
+ }
+
+ if (between48(DCCP_SKB_CB(skb)->dccpd_seq, lswl, dp->dccps_swh) &&
+ (DCCP_SKB_CB(skb)->dccpd_ack_seq == DCCP_PKT_WITHOUT_ACK_SEQ ||
+ between48(DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ lawl, dp->dccps_awh))) {
+ dccp_update_gsr(sk, DCCP_SKB_CB(skb)->dccpd_seq);
+
+ if (dh->dccph_type != DCCP_PKT_SYNC &&
+ (DCCP_SKB_CB(skb)->dccpd_ack_seq !=
+ DCCP_PKT_WITHOUT_ACK_SEQ))
+ dp->dccps_gar = DCCP_SKB_CB(skb)->dccpd_ack_seq;
+ } else {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: Step 6 failed for %s packet, "
+ "(LSWL(%llu) <= P.seqno(%llu) <= S.SWH(%llu)) and "
+ "(P.ackno %s or LAWL(%llu) <= P.ackno(%llu) <= S.AWH(%llu), "
+ "sending SYNC...\n",
+ dccp_packet_name(dh->dccph_type),
+ (unsigned long long) lswl,
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ (unsigned long long) dp->dccps_swh,
+ (DCCP_SKB_CB(skb)->dccpd_ack_seq ==
+ DCCP_PKT_WITHOUT_ACK_SEQ) ? "doesn't exist" : "exists",
+ (unsigned long long) lawl,
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ (unsigned long long) dp->dccps_awh);
+ dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq, DCCP_PKT_SYNC);
+ return -1;
+ }
+
+ return 0;
+}
+
+int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+ const struct dccp_hdr *dh, const unsigned len)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ if (dccp_check_seqno(sk, skb))
+ goto discard;
+
+ if (dccp_parse_options(sk, skb))
+ goto discard;
+
+ if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
+ dccp_event_ack_recv(sk, skb);
+
+ /*
+ * FIXME: check ECN to see if we should use
+ * DCCP_ACKPKTS_STATE_ECN_MARKED
+ */
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
+
+ if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts,
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_ACKPKTS_STATE_RECEIVED)) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: acknowledgeable "
+ "packets buffer full!\n");
+ ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
+ inet_csk_schedule_ack(sk);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ TCP_DELACK_MIN,
+ DCCP_RTO_MAX);
+ goto discard;
+ }
+
+ /*
+ * FIXME: this activation is probably wrong, have to study more
+ * TCP delack machinery and how it fits into DCCP draft, but
+ * for now it kinda "works" 8)
+ */
+ if (!inet_csk_ack_scheduled(sk)) {
+ inet_csk_schedule_ack(sk);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, 5 * HZ,
+ DCCP_RTO_MAX);
+ }
+ }
+
+ ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
+ ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
+
+ switch (dccp_hdr(skb)->dccph_type) {
+ case DCCP_PKT_DATAACK:
+ case DCCP_PKT_DATA:
+ /*
+ * FIXME: check if sk_receive_queue is full, schedule DATA_DROPPED
+ * option if it is.
+ */
+ __skb_pull(skb, dh->dccph_doff * 4);
+ __skb_queue_tail(&sk->sk_receive_queue, skb);
+ skb_set_owner_r(skb, sk);
+ sk->sk_data_ready(sk, 0);
+ return 0;
+ case DCCP_PKT_ACK:
+ goto discard;
+ case DCCP_PKT_RESET:
+ /*
+ * Step 9: Process Reset
+ * If P.type == Reset,
+ * Tear down connection
+ * S.state := TIMEWAIT
+ * Set TIMEWAIT timer
+ * Drop packet and return
+ */
+ dccp_fin(sk, skb);
+ dccp_time_wait(sk, DCCP_TIME_WAIT, 0);
+ return 0;
+ case DCCP_PKT_CLOSEREQ:
+ dccp_rcv_closereq(sk, skb);
+ goto discard;
+ case DCCP_PKT_CLOSE:
+ dccp_rcv_close(sk, skb);
+ return 0;
+ case DCCP_PKT_REQUEST:
+ /* Step 7
+ * or (S.is_server and P.type == Response)
+ * or (S.is_client and P.type == Request)
+ * or (S.state >= OPEN and P.type == Request
+ * and P.seqno >= S.OSR)
+ * or (S.state >= OPEN and P.type == Response
+ * and P.seqno >= S.OSR)
+ * or (S.state == RESPOND and P.type == Data),
+ * Send Sync packet acknowledging P.seqno
+ * Drop packet and return
+ */
+ if (dp->dccps_role != DCCP_ROLE_LISTEN)
+ goto send_sync;
+ goto check_seq;
+ case DCCP_PKT_RESPONSE:
+ if (dp->dccps_role != DCCP_ROLE_CLIENT)
+ goto send_sync;
+check_seq:
+ if (!before48(DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_osr)) {
+send_sync:
+ dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_PKT_SYNC);
+ }
+ break;
+ case DCCP_PKT_SYNC:
+ dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_PKT_SYNCACK);
+ /*
+ * From the draft:
+ *
+ * As with DCCP-Ack packets, DCCP-Sync and DCCP-SyncAck packets
+ * MAY have non-zero-length application data areas, whose
+ * contents * receivers MUST ignore.
+ */
+ goto discard;
+ }
+
+ DCCP_INC_STATS_BH(DCCP_MIB_INERRS);
+discard:
+ __kfree_skb(skb);
+ return 0;
+}
+
+static int dccp_rcv_request_sent_state_process(struct sock *sk,
+ struct sk_buff *skb,
+ const struct dccp_hdr *dh,
+ const unsigned len)
+{
+ /*
+ * Step 4: Prepare sequence numbers in REQUEST
+ * If S.state == REQUEST,
+ * If (P.type == Response or P.type == Reset)
+ * and S.AWL <= P.ackno <= S.AWH,
+ * / * Set sequence number variables corresponding to the
+ * other endpoint, so P will pass the tests in Step 6 * /
+ * Set S.GSR, S.ISR, S.SWL, S.SWH
+ * / * Response processing continues in Step 10; Reset
+ * processing continues in Step 9 * /
+ */
+ if (dh->dccph_type == DCCP_PKT_RESPONSE) {
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ /* Stop the REQUEST timer */
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS);
+ BUG_TRAP(sk->sk_send_head != NULL);
+ __kfree_skb(sk->sk_send_head);
+ sk->sk_send_head = NULL;
+
+ if (!between48(DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ dp->dccps_awl, dp->dccps_awh)) {
+ dccp_pr_debug("invalid ackno: S.AWL=%llu, "
+ "P.ackno=%llu, S.AWH=%llu \n",
+ (unsigned long long)dp->dccps_awl,
+ (unsigned long long)DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ (unsigned long long)dp->dccps_awh);
+ goto out_invalid_packet;
+ }
+
+ dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq;
+ dccp_update_gsr(sk, dp->dccps_isr);
+ /*
+ * SWL and AWL are initially adjusted so that they are not less than
+ * the initial Sequence Numbers received and sent, respectively:
+ * SWL := max(GSR + 1 - floor(W/4), ISR),
+ * AWL := max(GSS - W' + 1, ISS).
+ * These adjustments MUST be applied only at the beginning of the
+ * connection.
+ *
+ * AWL was adjusted in dccp_v4_connect -acme
+ */
+ dccp_set_seqno(&dp->dccps_swl,
+ max48(dp->dccps_swl, dp->dccps_isr));
+
+ if (ccid_hc_rx_init(dp->dccps_hc_rx_ccid, sk) != 0 ||
+ ccid_hc_tx_init(dp->dccps_hc_tx_ccid, sk) != 0) {
+ ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
+ ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
+ /* FIXME: send appropriate RESET code */
+ goto out_invalid_packet;
+ }
+
+ dccp_sync_mss(sk, dp->dccps_pmtu_cookie);
+
+ /*
+ * Step 10: Process REQUEST state (second part)
+ * If S.state == REQUEST,
+ * / * If we get here, P is a valid Response from the
+ * server (see Step 4), and we should move to
+ * PARTOPEN state. PARTOPEN means send an Ack,
+ * don't send Data packets, retransmit Acks
+ * periodically, and always include any Init Cookie
+ * from the Response * /
+ * S.state := PARTOPEN
+ * Set PARTOPEN timer
+ * Continue with S.state == PARTOPEN
+ * / * Step 12 will send the Ack completing the
+ * three-way handshake * /
+ */
+ dccp_set_state(sk, DCCP_PARTOPEN);
+
+ /* Make sure socket is routed, for correct metrics. */
+ inet_sk_rebuild_header(sk);
+
+ if (!sock_flag(sk, SOCK_DEAD)) {
+ sk->sk_state_change(sk);
+ sk_wake_async(sk, 0, POLL_OUT);
+ }
+
+ if (sk->sk_write_pending || icsk->icsk_ack.pingpong ||
+ icsk->icsk_accept_queue.rskq_defer_accept) {
+ /* Save one ACK. Data will be ready after
+ * several ticks, if write_pending is set.
+ *
+ * It may be deleted, but with this feature tcpdumps
+ * look so _wonderfully_ clever, that I was not able
+ * to stand against the temptation 8) --ANK
+ */
+ /*
+ * OK, in DCCP we can as well do a similar trick, its
+ * even in the draft, but there is no need for us to
+ * schedule an ack here, as dccp_sendmsg does this for
+ * us, also stated in the draft. -acme
+ */
+ __kfree_skb(skb);
+ return 0;
+ }
+ dccp_send_ack(sk);
+ return -1;
+ }
+
+out_invalid_packet:
+ return 1; /* dccp_v4_do_rcv will send a reset, but...
+ FIXME: the reset code should be
+ DCCP_RESET_CODE_PACKET_ERROR */
+}
+
+static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
+ struct sk_buff *skb,
+ const struct dccp_hdr *dh,
+ const unsigned len)
+{
+ int queued = 0;
+
+ switch (dh->dccph_type) {
+ case DCCP_PKT_RESET:
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
+ break;
+ case DCCP_PKT_DATAACK:
+ case DCCP_PKT_ACK:
+ /*
+ * FIXME: we should be reseting the PARTOPEN (DELACK) timer
+ * here but only if we haven't used the DELACK timer for
+ * something else, like sending a delayed ack for a TIMESTAMP
+ * echo, etc, for now were not clearing it, sending an extra
+ * ACK when there is nothing else to do in DELACK is not a big
+ * deal after all.
+ */
+
+ /* Stop the PARTOPEN timer */
+ if (sk->sk_state == DCCP_PARTOPEN)
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
+
+ dccp_sk(sk)->dccps_osr = DCCP_SKB_CB(skb)->dccpd_seq;
+ dccp_set_state(sk, DCCP_OPEN);
+
+ if (dh->dccph_type == DCCP_PKT_DATAACK) {
+ dccp_rcv_established(sk, skb, dh, len);
+ queued = 1; /* packet was queued
+ (by dccp_rcv_established) */
+ }
+ break;
+ }
+
+ return queued;
+}
+
+int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
+ struct dccp_hdr *dh, unsigned len)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ const int old_state = sk->sk_state;
+ int queued = 0;
+
+ /*
+ * Step 3: Process LISTEN state
+ * (Continuing from dccp_v4_do_rcv and dccp_v6_do_rcv)
+ *
+ * If S.state == LISTEN,
+ * If P.type == Request or P contains a valid Init Cookie
+ * option,
+ * * Must scan the packet's options to check for an Init
+ * Cookie. Only the Init Cookie is processed here,
+ * however; other options are processed in Step 8. This
+ * scan need only be performed if the endpoint uses Init
+ * Cookies *
+ * * Generate a new socket and switch to that socket *
+ * Set S := new socket for this port pair
+ * S.state = RESPOND
+ * Choose S.ISS (initial seqno) or set from Init Cookie
+ * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
+ * Continue with S.state == RESPOND
+ * * A Response packet will be generated in Step 11 *
+ * Otherwise,
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ *
+ * NOTE: the check for the packet types is done in
+ * dccp_rcv_state_process
+ */
+ if (sk->sk_state == DCCP_LISTEN) {
+ if (dh->dccph_type == DCCP_PKT_REQUEST) {
+ if (dccp_v4_conn_request(sk, skb) < 0)
+ return 1;
+
+ /* FIXME: do congestion control initialization */
+ goto discard;
+ }
+ if (dh->dccph_type == DCCP_PKT_RESET)
+ goto discard;
+
+ /* Caller (dccp_v4_do_rcv) will send Reset(No Connection)*/
+ return 1;
+ }
+
+ if (sk->sk_state != DCCP_REQUESTING) {
+ if (dccp_check_seqno(sk, skb))
+ goto discard;
+
+ /*
+ * Step 8: Process options and mark acknowledgeable
+ */
+ if (dccp_parse_options(sk, skb))
+ goto discard;
+
+ if (DCCP_SKB_CB(skb)->dccpd_ack_seq !=
+ DCCP_PKT_WITHOUT_ACK_SEQ)
+ dccp_event_ack_recv(sk, skb);
+
+ ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
+ ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
+
+ /*
+ * FIXME: check ECN to see if we should use
+ * DCCP_ACKPKTS_STATE_ECN_MARKED
+ */
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts,
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_ACKPKTS_STATE_RECEIVED))
+ goto discard;
+ /*
+ * FIXME: this activation is probably wrong, have to
+ * study more TCP delack machinery and how it fits into
+ * DCCP draft, but for now it kinda "works" 8)
+ */
+ if ((dp->dccps_hc_rx_ackpkts->dccpap_ack_seqno ==
+ DCCP_MAX_SEQNO + 1) &&
+ !inet_csk_ack_scheduled(sk)) {
+ inet_csk_schedule_ack(sk);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ TCP_DELACK_MIN,
+ DCCP_RTO_MAX);
+ }
+ }
+ }
+
+ /*
+ * Step 9: Process Reset
+ * If P.type == Reset,
+ * Tear down connection
+ * S.state := TIMEWAIT
+ * Set TIMEWAIT timer
+ * Drop packet and return
+ */
+ if (dh->dccph_type == DCCP_PKT_RESET) {
+ /*
+ * Queue the equivalent of TCP fin so that dccp_recvmsg
+ * exits the loop
+ */
+ dccp_fin(sk, skb);
+ dccp_time_wait(sk, DCCP_TIME_WAIT, 0);
+ return 0;
+ /*
+ * Step 7: Check for unexpected packet types
+ * If (S.is_server and P.type == CloseReq)
+ * or (S.is_server and P.type == Response)
+ * or (S.is_client and P.type == Request)
+ * or (S.state == RESPOND and P.type == Data),
+ * Send Sync packet acknowledging P.seqno
+ * Drop packet and return
+ */
+ } else if ((dp->dccps_role != DCCP_ROLE_CLIENT &&
+ (dh->dccph_type == DCCP_PKT_RESPONSE ||
+ dh->dccph_type == DCCP_PKT_CLOSEREQ)) ||
+ (dp->dccps_role == DCCP_ROLE_CLIENT &&
+ dh->dccph_type == DCCP_PKT_REQUEST) ||
+ (sk->sk_state == DCCP_RESPOND &&
+ dh->dccph_type == DCCP_PKT_DATA)) {
+ dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_PKT_SYNC);
+ goto discard;
+ } else if (dh->dccph_type == DCCP_PKT_CLOSEREQ) {
+ dccp_rcv_closereq(sk, skb);
+ goto discard;
+ } else if (dh->dccph_type == DCCP_PKT_CLOSE) {
+ dccp_rcv_close(sk, skb);
+ return 0;
+ }
+
+ switch (sk->sk_state) {
+ case DCCP_CLOSED:
+ return 1;
+
+ case DCCP_REQUESTING:
+ /* FIXME: do congestion control initialization */
+
+ queued = dccp_rcv_request_sent_state_process(sk, skb, dh, len);
+ if (queued >= 0)
+ return queued;
+
+ __kfree_skb(skb);
+ return 0;
+
+ case DCCP_RESPOND:
+ case DCCP_PARTOPEN:
+ queued = dccp_rcv_respond_partopen_state_process(sk, skb,
+ dh, len);
+ break;
+ }
+
+ if (dh->dccph_type == DCCP_PKT_ACK ||
+ dh->dccph_type == DCCP_PKT_DATAACK) {
+ switch (old_state) {
+ case DCCP_PARTOPEN:
+ sk->sk_state_change(sk);
+ sk_wake_async(sk, 0, POLL_OUT);
+ break;
+ }
+ }
+
+ if (!queued) {
+discard:
+ __kfree_skb(skb);
+ }
+ return 0;
+}
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
new file mode 100644
index 000000000000..3fc75dbee4b8
--- /dev/null
+++ b/net/dccp/ipv4.c
@@ -0,0 +1,1356 @@
+/*
+ * net/dccp/ipv4.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/icmp.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/random.h>
+
+#include <net/icmp.h>
+#include <net/inet_hashtables.h>
+#include <net/sock.h>
+#include <net/tcp_states.h>
+#include <net/xfrm.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+struct inet_hashinfo __cacheline_aligned dccp_hashinfo = {
+ .lhash_lock = RW_LOCK_UNLOCKED,
+ .lhash_users = ATOMIC_INIT(0),
+ .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait),
+ .portalloc_lock = SPIN_LOCK_UNLOCKED,
+ .port_rover = 1024 - 1,
+};
+
+EXPORT_SYMBOL_GPL(dccp_hashinfo);
+
+static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
+{
+ return inet_csk_get_port(&dccp_hashinfo, sk, snum);
+}
+
+static void dccp_v4_hash(struct sock *sk)
+{
+ inet_hash(&dccp_hashinfo, sk);
+}
+
+static void dccp_v4_unhash(struct sock *sk)
+{
+ inet_unhash(&dccp_hashinfo, sk);
+}
+
+/* called with local bh disabled */
+static int __dccp_v4_check_established(struct sock *sk, const __u16 lport,
+ struct inet_timewait_sock **twp)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ const u32 daddr = inet->rcv_saddr;
+ const u32 saddr = inet->daddr;
+ const int dif = sk->sk_bound_dev_if;
+ INET_ADDR_COOKIE(acookie, saddr, daddr)
+ const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
+ const int hash = inet_ehashfn(daddr, lport, saddr, inet->dport,
+ dccp_hashinfo.ehash_size);
+ struct inet_ehash_bucket *head = &dccp_hashinfo.ehash[hash];
+ const struct sock *sk2;
+ const struct hlist_node *node;
+ struct inet_timewait_sock *tw;
+
+ write_lock(&head->lock);
+
+ /* Check TIME-WAIT sockets first. */
+ sk_for_each(sk2, node, &(head + dccp_hashinfo.ehash_size)->chain) {
+ tw = inet_twsk(sk2);
+
+ if (INET_TW_MATCH(sk2, acookie, saddr, daddr, ports, dif))
+ goto not_unique;
+ }
+ tw = NULL;
+
+ /* And established part... */
+ sk_for_each(sk2, node, &head->chain) {
+ if (INET_MATCH(sk2, acookie, saddr, daddr, ports, dif))
+ goto not_unique;
+ }
+
+ /* Must record num and sport now. Otherwise we will see
+ * in hash table socket with a funny identity. */
+ inet->num = lport;
+ inet->sport = htons(lport);
+ sk->sk_hashent = hash;
+ BUG_TRAP(sk_unhashed(sk));
+ __sk_add_node(sk, &head->chain);
+ sock_prot_inc_use(sk->sk_prot);
+ write_unlock(&head->lock);
+
+ if (twp != NULL) {
+ *twp = tw;
+ NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
+ } else if (tw != NULL) {
+ /* Silly. Should hash-dance instead... */
+ inet_twsk_deschedule(tw, &dccp_death_row);
+ NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
+
+ inet_twsk_put(tw);
+ }
+
+ return 0;
+
+not_unique:
+ write_unlock(&head->lock);
+ return -EADDRNOTAVAIL;
+}
+
+/*
+ * Bind a port for a connect operation and hash it.
+ */
+static int dccp_v4_hash_connect(struct sock *sk)
+{
+ const unsigned short snum = inet_sk(sk)->num;
+ struct inet_bind_hashbucket *head;
+ struct inet_bind_bucket *tb;
+ int ret;
+
+ if (snum == 0) {
+ int rover;
+ int low = sysctl_local_port_range[0];
+ int high = sysctl_local_port_range[1];
+ int remaining = (high - low) + 1;
+ struct hlist_node *node;
+ struct inet_timewait_sock *tw = NULL;
+
+ local_bh_disable();
+
+ /* TODO. Actually it is not so bad idea to remove
+ * dccp_hashinfo.portalloc_lock before next submission to
+ * Linus.
+ * As soon as we touch this place at all it is time to think.
+ *
+ * Now it protects single _advisory_ variable
+ * dccp_hashinfo.port_rover, hence it is mostly useless.
+ * Code will work nicely if we just delete it, but
+ * I am afraid in contented case it will work not better or
+ * even worse: another cpu just will hit the same bucket
+ * and spin there.
+ * So some cpu salt could remove both contention and
+ * memory pingpong. Any ideas how to do this in a nice way?
+ */
+ spin_lock(&dccp_hashinfo.portalloc_lock);
+ rover = dccp_hashinfo.port_rover;
+
+ do {
+ rover++;
+ if ((rover < low) || (rover > high))
+ rover = low;
+ head = &dccp_hashinfo.bhash[inet_bhashfn(rover,
+ dccp_hashinfo.bhash_size)];
+ spin_lock(&head->lock);
+
+ /* Does not bother with rcv_saddr checks,
+ * because the established check is already
+ * unique enough.
+ */
+ inet_bind_bucket_for_each(tb, node, &head->chain) {
+ if (tb->port == rover) {
+ BUG_TRAP(!hlist_empty(&tb->owners));
+ if (tb->fastreuse >= 0)
+ goto next_port;
+ if (!__dccp_v4_check_established(sk,
+ rover,
+ &tw))
+ goto ok;
+ goto next_port;
+ }
+ }
+
+ tb = inet_bind_bucket_create(dccp_hashinfo.bind_bucket_cachep,
+ head, rover);
+ if (tb == NULL) {
+ spin_unlock(&head->lock);
+ break;
+ }
+ tb->fastreuse = -1;
+ goto ok;
+
+ next_port:
+ spin_unlock(&head->lock);
+ } while (--remaining > 0);
+ dccp_hashinfo.port_rover = rover;
+ spin_unlock(&dccp_hashinfo.portalloc_lock);
+
+ local_bh_enable();
+
+ return -EADDRNOTAVAIL;
+
+ok:
+ /* All locks still held and bhs disabled */
+ dccp_hashinfo.port_rover = rover;
+ spin_unlock(&dccp_hashinfo.portalloc_lock);
+
+ inet_bind_hash(sk, tb, rover);
+ if (sk_unhashed(sk)) {
+ inet_sk(sk)->sport = htons(rover);
+ __inet_hash(&dccp_hashinfo, sk, 0);
+ }
+ spin_unlock(&head->lock);
+
+ if (tw != NULL) {
+ inet_twsk_deschedule(tw, &dccp_death_row);
+ inet_twsk_put(tw);
+ }
+
+ ret = 0;
+ goto out;
+ }
+
+ head = &dccp_hashinfo.bhash[inet_bhashfn(snum,
+ dccp_hashinfo.bhash_size)];
+ tb = inet_csk(sk)->icsk_bind_hash;
+ spin_lock_bh(&head->lock);
+ if (sk_head(&tb->owners) == sk && sk->sk_bind_node.next == NULL) {
+ __inet_hash(&dccp_hashinfo, sk, 0);
+ spin_unlock_bh(&head->lock);
+ return 0;
+ } else {
+ spin_unlock(&head->lock);
+ /* No definite answer... Walk to established hash table */
+ ret = __dccp_v4_check_established(sk, snum, NULL);
+out:
+ local_bh_enable();
+ return ret;
+ }
+}
+
+static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
+ int addr_len)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct dccp_sock *dp = dccp_sk(sk);
+ const struct sockaddr_in *usin = (struct sockaddr_in *)uaddr;
+ struct rtable *rt;
+ u32 daddr, nexthop;
+ int tmp;
+ int err;
+
+ dp->dccps_role = DCCP_ROLE_CLIENT;
+
+ if (addr_len < sizeof(struct sockaddr_in))
+ return -EINVAL;
+
+ if (usin->sin_family != AF_INET)
+ return -EAFNOSUPPORT;
+
+ nexthop = daddr = usin->sin_addr.s_addr;
+ if (inet->opt != NULL && inet->opt->srr) {
+ if (daddr == 0)
+ return -EINVAL;
+ nexthop = inet->opt->faddr;
+ }
+
+ tmp = ip_route_connect(&rt, nexthop, inet->saddr,
+ RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
+ IPPROTO_DCCP,
+ inet->sport, usin->sin_port, sk);
+ if (tmp < 0)
+ return tmp;
+
+ if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
+ ip_rt_put(rt);
+ return -ENETUNREACH;
+ }
+
+ if (inet->opt == NULL || !inet->opt->srr)
+ daddr = rt->rt_dst;
+
+ if (inet->saddr == 0)
+ inet->saddr = rt->rt_src;
+ inet->rcv_saddr = inet->saddr;
+
+ inet->dport = usin->sin_port;
+ inet->daddr = daddr;
+
+ dp->dccps_ext_header_len = 0;
+ if (inet->opt != NULL)
+ dp->dccps_ext_header_len = inet->opt->optlen;
+ /*
+ * Socket identity is still unknown (sport may be zero).
+ * However we set state to DCCP_REQUESTING and not releasing socket
+ * lock select source port, enter ourselves into the hash tables and
+ * complete initialization after this.
+ */
+ dccp_set_state(sk, DCCP_REQUESTING);
+ err = dccp_v4_hash_connect(sk);
+ if (err != 0)
+ goto failure;
+
+ err = ip_route_newports(&rt, inet->sport, inet->dport, sk);
+ if (err != 0)
+ goto failure;
+
+ /* OK, now commit destination to socket. */
+ sk_setup_caps(sk, &rt->u.dst);
+
+ dp->dccps_gar =
+ dp->dccps_iss = secure_dccp_sequence_number(inet->saddr,
+ inet->daddr,
+ inet->sport,
+ usin->sin_port);
+ dccp_update_gss(sk, dp->dccps_iss);
+
+ /*
+ * SWL and AWL are initially adjusted so that they are not less than
+ * the initial Sequence Numbers received and sent, respectively:
+ * SWL := max(GSR + 1 - floor(W/4), ISR),
+ * AWL := max(GSS - W' + 1, ISS).
+ * These adjustments MUST be applied only at the beginning of the
+ * connection.
+ */
+ dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
+
+ inet->id = dp->dccps_iss ^ jiffies;
+
+ err = dccp_connect(sk);
+ rt = NULL;
+ if (err != 0)
+ goto failure;
+out:
+ return err;
+failure:
+ /*
+ * This unhashes the socket and releases the local port, if necessary.
+ */
+ dccp_set_state(sk, DCCP_CLOSED);
+ ip_rt_put(rt);
+ sk->sk_route_caps = 0;
+ inet->dport = 0;
+ goto out;
+}
+
+/*
+ * This routine does path mtu discovery as defined in RFC1191.
+ */
+static inline void dccp_do_pmtu_discovery(struct sock *sk,
+ const struct iphdr *iph,
+ u32 mtu)
+{
+ struct dst_entry *dst;
+ const struct inet_sock *inet = inet_sk(sk);
+ const struct dccp_sock *dp = dccp_sk(sk);
+
+ /* We are not interested in DCCP_LISTEN and request_socks (RESPONSEs
+ * send out by Linux are always < 576bytes so they should go through
+ * unfragmented).
+ */
+ if (sk->sk_state == DCCP_LISTEN)
+ return;
+
+ /* We don't check in the destentry if pmtu discovery is forbidden
+ * on this route. We just assume that no packet_to_big packets
+ * are send back when pmtu discovery is not active.
+ * There is a small race when the user changes this flag in the
+ * route, but I think that's acceptable.
+ */
+ if ((dst = __sk_dst_check(sk, 0)) == NULL)
+ return;
+
+ dst->ops->update_pmtu(dst, mtu);
+
+ /* Something is about to be wrong... Remember soft error
+ * for the case, if this connection will not able to recover.
+ */
+ if (mtu < dst_mtu(dst) && ip_dont_fragment(sk, dst))
+ sk->sk_err_soft = EMSGSIZE;
+
+ mtu = dst_mtu(dst);
+
+ if (inet->pmtudisc != IP_PMTUDISC_DONT &&
+ dp->dccps_pmtu_cookie > mtu) {
+ dccp_sync_mss(sk, mtu);
+
+ /*
+ * From: draft-ietf-dccp-spec-11.txt
+ *
+ * DCCP-Sync packets are the best choice for upward
+ * probing, since DCCP-Sync probes do not risk application
+ * data loss.
+ */
+ dccp_send_sync(sk, dp->dccps_gsr, DCCP_PKT_SYNC);
+ } /* else let the usual retransmit timer handle it */
+}
+
+static void dccp_v4_ctl_send_ack(struct sk_buff *rxskb)
+{
+ int err;
+ struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
+ const int dccp_hdr_ack_len = sizeof(struct dccp_hdr) +
+ sizeof(struct dccp_hdr_ext) +
+ sizeof(struct dccp_hdr_ack_bits);
+ struct sk_buff *skb;
+
+ if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
+ return;
+
+ skb = alloc_skb(MAX_DCCP_HEADER + 15, GFP_ATOMIC);
+ if (skb == NULL)
+ return;
+
+ /* Reserve space for headers. */
+ skb_reserve(skb, MAX_DCCP_HEADER);
+
+ skb->dst = dst_clone(rxskb->dst);
+
+ skb->h.raw = skb_push(skb, dccp_hdr_ack_len);
+ dh = dccp_hdr(skb);
+ memset(dh, 0, dccp_hdr_ack_len);
+
+ /* Build DCCP header and checksum it. */
+ dh->dccph_type = DCCP_PKT_ACK;
+ dh->dccph_sport = rxdh->dccph_dport;
+ dh->dccph_dport = rxdh->dccph_sport;
+ dh->dccph_doff = dccp_hdr_ack_len / 4;
+ dh->dccph_x = 1;
+
+ dccp_hdr_set_seq(dh, DCCP_SKB_CB(rxskb)->dccpd_ack_seq);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+ DCCP_SKB_CB(rxskb)->dccpd_seq);
+
+ bh_lock_sock(dccp_ctl_socket->sk);
+ err = ip_build_and_send_pkt(skb, dccp_ctl_socket->sk,
+ rxskb->nh.iph->daddr,
+ rxskb->nh.iph->saddr, NULL);
+ bh_unlock_sock(dccp_ctl_socket->sk);
+
+ if (err == NET_XMIT_CN || err == 0) {
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
+ }
+}
+
+static void dccp_v4_reqsk_send_ack(struct sk_buff *skb,
+ struct request_sock *req)
+{
+ dccp_v4_ctl_send_ack(skb);
+}
+
+static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
+ struct dst_entry *dst)
+{
+ int err = -1;
+ struct sk_buff *skb;
+
+ /* First, grab a route. */
+
+ if (dst == NULL && (dst = inet_csk_route_req(sk, req)) == NULL)
+ goto out;
+
+ skb = dccp_make_response(sk, dst, req);
+ if (skb != NULL) {
+ const struct inet_request_sock *ireq = inet_rsk(req);
+
+ err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
+ ireq->rmt_addr,
+ ireq->opt);
+ if (err == NET_XMIT_CN)
+ err = 0;
+ }
+
+out:
+ dst_release(dst);
+ return err;
+}
+
+/*
+ * This routine is called by the ICMP module when it gets some sort of error
+ * condition. If err < 0 then the socket should be closed and the error
+ * returned to the user. If err > 0 it's just the icmp type << 8 | icmp code.
+ * After adjustment header points to the first 8 bytes of the tcp header. We
+ * need to find the appropriate port.
+ *
+ * The locking strategy used here is very "optimistic". When someone else
+ * accesses the socket the ICMP is just dropped and for some paths there is no
+ * check at all. A more general error queue to queue errors for later handling
+ * is probably better.
+ */
+void dccp_v4_err(struct sk_buff *skb, u32 info)
+{
+ const struct iphdr *iph = (struct iphdr *)skb->data;
+ const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data +
+ (iph->ihl << 2));
+ struct dccp_sock *dp;
+ struct inet_sock *inet;
+ const int type = skb->h.icmph->type;
+ const int code = skb->h.icmph->code;
+ struct sock *sk;
+ __u64 seq;
+ int err;
+
+ if (skb->len < (iph->ihl << 2) + 8) {
+ ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ return;
+ }
+
+ sk = inet_lookup(&dccp_hashinfo, iph->daddr, dh->dccph_dport,
+ iph->saddr, dh->dccph_sport, inet_iif(skb));
+ if (sk == NULL) {
+ ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ return;
+ }
+
+ if (sk->sk_state == DCCP_TIME_WAIT) {
+ inet_twsk_put((struct inet_timewait_sock *)sk);
+ return;
+ }
+
+ bh_lock_sock(sk);
+ /* If too many ICMPs get dropped on busy
+ * servers this needs to be solved differently.
+ */
+ if (sock_owned_by_user(sk))
+ NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS);
+
+ if (sk->sk_state == DCCP_CLOSED)
+ goto out;
+
+ dp = dccp_sk(sk);
+ seq = dccp_hdr_seq(skb);
+ if (sk->sk_state != DCCP_LISTEN &&
+ !between48(seq, dp->dccps_swl, dp->dccps_swh)) {
+ NET_INC_STATS(LINUX_MIB_OUTOFWINDOWICMPS);
+ goto out;
+ }
+
+ switch (type) {
+ case ICMP_SOURCE_QUENCH:
+ /* Just silently ignore these. */
+ goto out;
+ case ICMP_PARAMETERPROB:
+ err = EPROTO;
+ break;
+ case ICMP_DEST_UNREACH:
+ if (code > NR_ICMP_UNREACH)
+ goto out;
+
+ if (code == ICMP_FRAG_NEEDED) { /* PMTU discovery (RFC1191) */
+ if (!sock_owned_by_user(sk))
+ dccp_do_pmtu_discovery(sk, iph, info);
+ goto out;
+ }
+
+ err = icmp_err_convert[code].errno;
+ break;
+ case ICMP_TIME_EXCEEDED:
+ err = EHOSTUNREACH;
+ break;
+ default:
+ goto out;
+ }
+
+ switch (sk->sk_state) {
+ struct request_sock *req , **prev;
+ case DCCP_LISTEN:
+ if (sock_owned_by_user(sk))
+ goto out;
+ req = inet_csk_search_req(sk, &prev, dh->dccph_dport,
+ iph->daddr, iph->saddr);
+ if (!req)
+ goto out;
+
+ /*
+ * ICMPs are not backlogged, hence we cannot get an established
+ * socket here.
+ */
+ BUG_TRAP(!req->sk);
+
+ if (seq != dccp_rsk(req)->dreq_iss) {
+ NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+ goto out;
+ }
+ /*
+ * Still in RESPOND, just remove it silently.
+ * There is no good way to pass the error to the newly
+ * created socket, and POSIX does not want network
+ * errors returned from accept().
+ */
+ inet_csk_reqsk_queue_drop(sk, req, prev);
+ goto out;
+
+ case DCCP_REQUESTING:
+ case DCCP_RESPOND:
+ if (!sock_owned_by_user(sk)) {
+ DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+ sk->sk_err = err;
+
+ sk->sk_error_report(sk);
+
+ dccp_done(sk);
+ } else
+ sk->sk_err_soft = err;
+ goto out;
+ }
+
+ /* If we've already connected we will keep trying
+ * until we time out, or the user gives up.
+ *
+ * rfc1122 4.2.3.9 allows to consider as hard errors
+ * only PROTO_UNREACH and PORT_UNREACH (well, FRAG_FAILED too,
+ * but it is obsoleted by pmtu discovery).
+ *
+ * Note, that in modern internet, where routing is unreliable
+ * and in each dark corner broken firewalls sit, sending random
+ * errors ordered by their masters even this two messages finally lose
+ * their original sense (even Linux sends invalid PORT_UNREACHs)
+ *
+ * Now we are in compliance with RFCs.
+ * --ANK (980905)
+ */
+
+ inet = inet_sk(sk);
+ if (!sock_owned_by_user(sk) && inet->recverr) {
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
+ } else /* Only an error on timeout */
+ sk->sk_err_soft = err;
+out:
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
+
+int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
+{
+ struct sk_buff *skb;
+ /*
+ * FIXME: what if rebuild_header fails?
+ * Should we be doing a rebuild_header here?
+ */
+ int err = inet_sk_rebuild_header(sk);
+
+ if (err != 0)
+ return err;
+
+ skb = dccp_make_reset(sk, sk->sk_dst_cache, code);
+ if (skb != NULL) {
+ const struct dccp_sock *dp = dccp_sk(sk);
+ const struct inet_sock *inet = inet_sk(sk);
+
+ err = ip_build_and_send_pkt(skb, sk,
+ inet->saddr, inet->daddr, NULL);
+ if (err == NET_XMIT_CN)
+ err = 0;
+
+ ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
+ ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
+ }
+
+ return err;
+}
+
+static inline u64 dccp_v4_init_sequence(const struct sock *sk,
+ const struct sk_buff *skb)
+{
+ return secure_dccp_sequence_number(skb->nh.iph->daddr,
+ skb->nh.iph->saddr,
+ dccp_hdr(skb)->dccph_dport,
+ dccp_hdr(skb)->dccph_sport);
+}
+
+int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
+{
+ struct inet_request_sock *ireq;
+ struct dccp_sock dp;
+ struct request_sock *req;
+ struct dccp_request_sock *dreq;
+ const __u32 saddr = skb->nh.iph->saddr;
+ const __u32 daddr = skb->nh.iph->daddr;
+ struct dst_entry *dst = NULL;
+
+ /* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
+ if (((struct rtable *)skb->dst)->rt_flags &
+ (RTCF_BROADCAST | RTCF_MULTICAST))
+ goto drop;
+
+ /*
+ * TW buckets are converted to open requests without
+ * limitations, they conserve resources and peer is
+ * evidently real one.
+ */
+ if (inet_csk_reqsk_queue_is_full(sk))
+ goto drop;
+
+ /*
+ * Accept backlog is full. If we have already queued enough
+ * of warm entries in syn queue, drop request. It is better than
+ * clogging syn queue with openreqs with exponentially increasing
+ * timeout.
+ */
+ if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
+ goto drop;
+
+ req = reqsk_alloc(sk->sk_prot->rsk_prot);
+ if (req == NULL)
+ goto drop;
+
+ /* FIXME: process options */
+
+ dccp_openreq_init(req, &dp, skb);
+
+ ireq = inet_rsk(req);
+ ireq->loc_addr = daddr;
+ ireq->rmt_addr = saddr;
+ /* FIXME: Merge Aristeu's option parsing code when ready */
+ req->rcv_wnd = 100; /* Fake, option parsing will get the
+ right value */
+ ireq->opt = NULL;
+
+ /*
+ * Step 3: Process LISTEN state
+ *
+ * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
+ *
+ * In fact we defer setting S.GSR, S.SWL, S.SWH to
+ * dccp_create_openreq_child.
+ */
+ dreq = dccp_rsk(req);
+ dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq;
+ dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
+ dreq->dreq_service = dccp_hdr_request(skb)->dccph_req_service;
+
+ if (dccp_v4_send_response(sk, req, dst))
+ goto drop_and_free;
+
+ inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
+ return 0;
+
+drop_and_free:
+ /*
+ * FIXME: should be reqsk_free after implementing req->rsk_ops
+ */
+ __reqsk_free(req);
+drop:
+ DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+ return -1;
+}
+
+/*
+ * The three way handshake has completed - we got a valid ACK or DATAACK -
+ * now create the new socket.
+ *
+ * This is the equivalent of TCP's tcp_v4_syn_recv_sock
+ */
+struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *req,
+ struct dst_entry *dst)
+{
+ struct inet_request_sock *ireq;
+ struct inet_sock *newinet;
+ struct dccp_sock *newdp;
+ struct sock *newsk;
+
+ if (sk_acceptq_is_full(sk))
+ goto exit_overflow;
+
+ if (dst == NULL && (dst = inet_csk_route_req(sk, req)) == NULL)
+ goto exit;
+
+ newsk = dccp_create_openreq_child(sk, req, skb);
+ if (newsk == NULL)
+ goto exit;
+
+ sk_setup_caps(newsk, dst);
+
+ newdp = dccp_sk(newsk);
+ newinet = inet_sk(newsk);
+ ireq = inet_rsk(req);
+ newinet->daddr = ireq->rmt_addr;
+ newinet->rcv_saddr = ireq->loc_addr;
+ newinet->saddr = ireq->loc_addr;
+ newinet->opt = ireq->opt;
+ ireq->opt = NULL;
+ newinet->mc_index = inet_iif(skb);
+ newinet->mc_ttl = skb->nh.iph->ttl;
+ newinet->id = jiffies;
+
+ dccp_sync_mss(newsk, dst_mtu(dst));
+
+ __inet_hash(&dccp_hashinfo, newsk, 0);
+ __inet_inherit_port(&dccp_hashinfo, sk, newsk);
+
+ return newsk;
+
+exit_overflow:
+ NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS);
+exit:
+ NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS);
+ dst_release(dst);
+ return NULL;
+}
+
+static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
+{
+ const struct dccp_hdr *dh = dccp_hdr(skb);
+ const struct iphdr *iph = skb->nh.iph;
+ struct sock *nsk;
+ struct request_sock **prev;
+ /* Find possible connection requests. */
+ struct request_sock *req = inet_csk_search_req(sk, &prev,
+ dh->dccph_sport,
+ iph->saddr, iph->daddr);
+ if (req != NULL)
+ return dccp_check_req(sk, skb, req, prev);
+
+ nsk = __inet_lookup_established(&dccp_hashinfo,
+ iph->saddr, dh->dccph_sport,
+ iph->daddr, ntohs(dh->dccph_dport),
+ inet_iif(skb));
+ if (nsk != NULL) {
+ if (nsk->sk_state != DCCP_TIME_WAIT) {
+ bh_lock_sock(nsk);
+ return nsk;
+ }
+ inet_twsk_put((struct inet_timewait_sock *)nsk);
+ return NULL;
+ }
+
+ return sk;
+}
+
+int dccp_v4_checksum(const struct sk_buff *skb, const u32 saddr,
+ const u32 daddr)
+{
+ const struct dccp_hdr* dh = dccp_hdr(skb);
+ int checksum_len;
+ u32 tmp;
+
+ if (dh->dccph_cscov == 0)
+ checksum_len = skb->len;
+ else {
+ checksum_len = (dh->dccph_cscov + dh->dccph_x) * sizeof(u32);
+ checksum_len = checksum_len < skb->len ? checksum_len :
+ skb->len;
+ }
+
+ tmp = csum_partial((unsigned char *)dh, checksum_len, 0);
+ return csum_tcpudp_magic(saddr, daddr, checksum_len,
+ IPPROTO_DCCP, tmp);
+}
+
+static int dccp_v4_verify_checksum(struct sk_buff *skb,
+ const u32 saddr, const u32 daddr)
+{
+ struct dccp_hdr *dh = dccp_hdr(skb);
+ int checksum_len;
+ u32 tmp;
+
+ if (dh->dccph_cscov == 0)
+ checksum_len = skb->len;
+ else {
+ checksum_len = (dh->dccph_cscov + dh->dccph_x) * sizeof(u32);
+ checksum_len = checksum_len < skb->len ? checksum_len :
+ skb->len;
+ }
+ tmp = csum_partial((unsigned char *)dh, checksum_len, 0);
+ return csum_tcpudp_magic(saddr, daddr, checksum_len,
+ IPPROTO_DCCP, tmp) == 0 ? 0 : -1;
+}
+
+static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
+ struct sk_buff *skb)
+{
+ struct rtable *rt;
+ struct flowi fl = { .oif = ((struct rtable *)skb->dst)->rt_iif,
+ .nl_u = { .ip4_u =
+ { .daddr = skb->nh.iph->saddr,
+ .saddr = skb->nh.iph->daddr,
+ .tos = RT_CONN_FLAGS(sk) } },
+ .proto = sk->sk_protocol,
+ .uli_u = { .ports =
+ { .sport = dccp_hdr(skb)->dccph_dport,
+ .dport = dccp_hdr(skb)->dccph_sport }
+ }
+ };
+
+ if (ip_route_output_flow(&rt, &fl, sk, 0)) {
+ IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ return NULL;
+ }
+
+ return &rt->u.dst;
+}
+
+static void dccp_v4_ctl_send_reset(struct sk_buff *rxskb)
+{
+ int err;
+ struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
+ const int dccp_hdr_reset_len = sizeof(struct dccp_hdr) +
+ sizeof(struct dccp_hdr_ext) +
+ sizeof(struct dccp_hdr_reset);
+ struct sk_buff *skb;
+ struct dst_entry *dst;
+ u64 seqno;
+
+ /* Never send a reset in response to a reset. */
+ if (rxdh->dccph_type == DCCP_PKT_RESET)
+ return;
+
+ if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
+ return;
+
+ dst = dccp_v4_route_skb(dccp_ctl_socket->sk, rxskb);
+ if (dst == NULL)
+ return;
+
+ skb = alloc_skb(MAX_DCCP_HEADER + 15, GFP_ATOMIC);
+ if (skb == NULL)
+ goto out;
+
+ /* Reserve space for headers. */
+ skb_reserve(skb, MAX_DCCP_HEADER);
+ skb->dst = dst_clone(dst);
+
+ skb->h.raw = skb_push(skb, dccp_hdr_reset_len);
+ dh = dccp_hdr(skb);
+ memset(dh, 0, dccp_hdr_reset_len);
+
+ /* Build DCCP header and checksum it. */
+ dh->dccph_type = DCCP_PKT_RESET;
+ dh->dccph_sport = rxdh->dccph_dport;
+ dh->dccph_dport = rxdh->dccph_sport;
+ dh->dccph_doff = dccp_hdr_reset_len / 4;
+ dh->dccph_x = 1;
+ dccp_hdr_reset(skb)->dccph_reset_code =
+ DCCP_SKB_CB(rxskb)->dccpd_reset_code;
+
+ /* See "8.3.1. Abnormal Termination" in draft-ietf-dccp-spec-11 */
+ seqno = 0;
+ if (DCCP_SKB_CB(rxskb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
+ dccp_set_seqno(&seqno, DCCP_SKB_CB(rxskb)->dccpd_ack_seq + 1);
+
+ dccp_hdr_set_seq(dh, seqno);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+ DCCP_SKB_CB(rxskb)->dccpd_seq);
+
+ dh->dccph_checksum = dccp_v4_checksum(skb, rxskb->nh.iph->saddr,
+ rxskb->nh.iph->daddr);
+
+ bh_lock_sock(dccp_ctl_socket->sk);
+ err = ip_build_and_send_pkt(skb, dccp_ctl_socket->sk,
+ rxskb->nh.iph->daddr,
+ rxskb->nh.iph->saddr, NULL);
+ bh_unlock_sock(dccp_ctl_socket->sk);
+
+ if (err == NET_XMIT_CN || err == 0) {
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
+ }
+out:
+ dst_release(dst);
+}
+
+int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_hdr *dh = dccp_hdr(skb);
+
+ if (sk->sk_state == DCCP_OPEN) { /* Fast path */
+ if (dccp_rcv_established(sk, skb, dh, skb->len))
+ goto reset;
+ return 0;
+ }
+
+ /*
+ * Step 3: Process LISTEN state
+ * If S.state == LISTEN,
+ * If P.type == Request or P contains a valid Init Cookie
+ * option,
+ * * Must scan the packet's options to check for an Init
+ * Cookie. Only the Init Cookie is processed here,
+ * however; other options are processed in Step 8. This
+ * scan need only be performed if the endpoint uses Init
+ * Cookies *
+ * * Generate a new socket and switch to that socket *
+ * Set S := new socket for this port pair
+ * S.state = RESPOND
+ * Choose S.ISS (initial seqno) or set from Init Cookie
+ * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
+ * Continue with S.state == RESPOND
+ * * A Response packet will be generated in Step 11 *
+ * Otherwise,
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ *
+ * NOTE: the check for the packet types is done in
+ * dccp_rcv_state_process
+ */
+ if (sk->sk_state == DCCP_LISTEN) {
+ struct sock *nsk = dccp_v4_hnd_req(sk, skb);
+
+ if (nsk == NULL)
+ goto discard;
+
+ if (nsk != sk) {
+ if (dccp_child_process(sk, nsk, skb))
+ goto reset;
+ return 0;
+ }
+ }
+
+ if (dccp_rcv_state_process(sk, skb, dh, skb->len))
+ goto reset;
+ return 0;
+
+reset:
+ DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
+ dccp_v4_ctl_send_reset(skb);
+discard:
+ kfree_skb(skb);
+ return 0;
+}
+
+static inline int dccp_invalid_packet(struct sk_buff *skb)
+{
+ const struct dccp_hdr *dh;
+
+ if (skb->pkt_type != PACKET_HOST)
+ return 1;
+
+ if (!pskb_may_pull(skb, sizeof(struct dccp_hdr))) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: pskb_may_pull failed\n");
+ return 1;
+ }
+
+ dh = dccp_hdr(skb);
+
+ /* If the packet type is not understood, drop packet and return */
+ if (dh->dccph_type >= DCCP_PKT_INVALID) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: invalid packet type\n");
+ return 1;
+ }
+
+ /*
+ * If P.Data Offset is too small for packet type, or too large for
+ * packet, drop packet and return
+ */
+ if (dh->dccph_doff < dccp_hdr_len(skb) / sizeof(u32)) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.Data Offset(%u) "
+ "too small 1\n",
+ dh->dccph_doff);
+ return 1;
+ }
+
+ if (!pskb_may_pull(skb, dh->dccph_doff * sizeof(u32))) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.Data Offset(%u) "
+ "too small 2\n",
+ dh->dccph_doff);
+ return 1;
+ }
+
+ dh = dccp_hdr(skb);
+
+ /*
+ * If P.type is not Data, Ack, or DataAck and P.X == 0 (the packet
+ * has short sequence numbers), drop packet and return
+ */
+ if (dh->dccph_x == 0 &&
+ dh->dccph_type != DCCP_PKT_DATA &&
+ dh->dccph_type != DCCP_PKT_ACK &&
+ dh->dccph_type != DCCP_PKT_DATAACK) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: P.type (%s) not Data, Ack "
+ "nor DataAck and P.X == 0\n",
+ dccp_packet_name(dh->dccph_type));
+ return 1;
+ }
+
+ /* If the header checksum is incorrect, drop packet and return */
+ if (dccp_v4_verify_checksum(skb, skb->nh.iph->saddr,
+ skb->nh.iph->daddr) < 0) {
+ LIMIT_NETDEBUG(KERN_WARNING "DCCP: header checksum is "
+ "incorrect\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+/* this is called when real data arrives */
+int dccp_v4_rcv(struct sk_buff *skb)
+{
+ const struct dccp_hdr *dh;
+ struct sock *sk;
+ int rc;
+
+ /* Step 1: Check header basics: */
+
+ if (dccp_invalid_packet(skb))
+ goto discard_it;
+
+ dh = dccp_hdr(skb);
+#if 0
+ /*
+ * Use something like this to simulate some DATA/DATAACK loss to test
+ * dccp_ackpkts_add, you'll get something like this on a session that
+ * sends 10 DATA/DATAACK packets:
+ *
+ * ackpkts_print: 281473596467422 |0,0|3,0|0,0|3,0|0,0|3,0|0,0|3,0|0,1|
+ *
+ * 0, 0 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == just this packet
+ * 0, 1 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == two adjacent packets
+ * with the same state
+ * 3, 0 means: DCCP_ACKPKTS_STATE_NOT_RECEIVED, RLE == just this packet
+ *
+ * So...
+ *
+ * 281473596467422 was received
+ * 281473596467421 was not received
+ * 281473596467420 was received
+ * 281473596467419 was not received
+ * 281473596467418 was received
+ * 281473596467417 was not received
+ * 281473596467416 was received
+ * 281473596467415 was not received
+ * 281473596467414 was received
+ * 281473596467413 was received (this one was the 3way handshake
+ * RESPONSE)
+ *
+ */
+ if (dh->dccph_type == DCCP_PKT_DATA ||
+ dh->dccph_type == DCCP_PKT_DATAACK) {
+ static int discard = 0;
+
+ if (discard) {
+ discard = 0;
+ goto discard_it;
+ }
+ discard = 1;
+ }
+#endif
+ DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
+ DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
+
+ dccp_pr_debug("%8.8s "
+ "src=%u.%u.%u.%u@%-5d "
+ "dst=%u.%u.%u.%u@%-5d seq=%llu",
+ dccp_packet_name(dh->dccph_type),
+ NIPQUAD(skb->nh.iph->saddr), ntohs(dh->dccph_sport),
+ NIPQUAD(skb->nh.iph->daddr), ntohs(dh->dccph_dport),
+ (unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
+
+ if (dccp_packet_without_ack(skb)) {
+ DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ;
+ dccp_pr_debug_cat("\n");
+ } else {
+ DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb);
+ dccp_pr_debug_cat(", ack=%llu\n",
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ }
+
+ /* Step 2:
+ * Look up flow ID in table and get corresponding socket */
+ sk = __inet_lookup(&dccp_hashinfo,
+ skb->nh.iph->saddr, dh->dccph_sport,
+ skb->nh.iph->daddr, ntohs(dh->dccph_dport),
+ inet_iif(skb));
+
+ /*
+ * Step 2:
+ * If no socket ...
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ */
+ if (sk == NULL) {
+ dccp_pr_debug("failed to look up flow ID in table and "
+ "get corresponding socket\n");
+ goto no_dccp_socket;
+ }
+
+ /*
+ * Step 2:
+ * ... or S.state == TIMEWAIT,
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ */
+
+ if (sk->sk_state == DCCP_TIME_WAIT) {
+ dccp_pr_debug("sk->sk_state == DCCP_TIME_WAIT: "
+ "do_time_wait\n");
+ goto do_time_wait;
+ }
+
+ if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
+ dccp_pr_debug("xfrm4_policy_check failed\n");
+ goto discard_and_relse;
+ }
+
+ if (sk_filter(sk, skb, 0)) {
+ dccp_pr_debug("sk_filter failed\n");
+ goto discard_and_relse;
+ }
+
+ skb->dev = NULL;
+
+ bh_lock_sock(sk);
+ rc = 0;
+ if (!sock_owned_by_user(sk))
+ rc = dccp_v4_do_rcv(sk, skb);
+ else
+ sk_add_backlog(sk, skb);
+ bh_unlock_sock(sk);
+
+ sock_put(sk);
+ return rc;
+
+no_dccp_socket:
+ if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
+ goto discard_it;
+ /*
+ * Step 2:
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ */
+ if (dh->dccph_type != DCCP_PKT_RESET) {
+ DCCP_SKB_CB(skb)->dccpd_reset_code =
+ DCCP_RESET_CODE_NO_CONNECTION;
+ dccp_v4_ctl_send_reset(skb);
+ }
+
+discard_it:
+ /* Discard frame. */
+ kfree_skb(skb);
+ return 0;
+
+discard_and_relse:
+ sock_put(sk);
+ goto discard_it;
+
+do_time_wait:
+ inet_twsk_put((struct inet_timewait_sock *)sk);
+ goto no_dccp_socket;
+}
+
+static int dccp_v4_init_sock(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ static int dccp_ctl_socket_init = 1;
+
+ dccp_options_init(&dp->dccps_options);
+
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ dp->dccps_hc_rx_ackpkts =
+ dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
+ GFP_KERNEL);
+
+ if (dp->dccps_hc_rx_ackpkts == NULL)
+ return -ENOMEM;
+ }
+
+ /*
+ * FIXME: We're hardcoding the CCID, and doing this at this point makes
+ * the listening (master) sock get CCID control blocks, which is not
+ * necessary, but for now, to not mess with the test userspace apps,
+ * lets leave it here, later the real solution is to do this in a
+ * setsockopt(CCIDs-I-want/accept). -acme
+ */
+ if (likely(!dccp_ctl_socket_init)) {
+ dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ sk);
+ dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ sk);
+ if (dp->dccps_hc_rx_ccid == NULL ||
+ dp->dccps_hc_tx_ccid == NULL) {
+ ccid_exit(dp->dccps_hc_rx_ccid, sk);
+ ccid_exit(dp->dccps_hc_tx_ccid, sk);
+ dccp_ackpkts_free(dp->dccps_hc_rx_ackpkts);
+ dp->dccps_hc_rx_ackpkts = NULL;
+ dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
+ return -ENOMEM;
+ }
+ } else
+ dccp_ctl_socket_init = 0;
+
+ dccp_init_xmit_timers(sk);
+ inet_csk(sk)->icsk_rto = DCCP_TIMEOUT_INIT;
+ sk->sk_state = DCCP_CLOSED;
+ sk->sk_write_space = dccp_write_space;
+ dp->dccps_mss_cache = 536;
+ dp->dccps_role = DCCP_ROLE_UNDEFINED;
+
+ return 0;
+}
+
+static int dccp_v4_destroy_sock(struct sock *sk)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ /*
+ * DCCP doesn't use sk_qrite_queue, just sk_send_head
+ * for retransmissions
+ */
+ if (sk->sk_send_head != NULL) {
+ kfree_skb(sk->sk_send_head);
+ sk->sk_send_head = NULL;
+ }
+
+ /* Clean up a referenced DCCP bind bucket. */
+ if (inet_csk(sk)->icsk_bind_hash != NULL)
+ inet_put_port(&dccp_hashinfo, sk);
+
+ ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
+ ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
+ dccp_ackpkts_free(dp->dccps_hc_rx_ackpkts);
+ dp->dccps_hc_rx_ackpkts = NULL;
+ ccid_exit(dp->dccps_hc_rx_ccid, sk);
+ ccid_exit(dp->dccps_hc_tx_ccid, sk);
+ dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
+
+ return 0;
+}
+
+static void dccp_v4_reqsk_destructor(struct request_sock *req)
+{
+ kfree(inet_rsk(req)->opt);
+}
+
+static struct request_sock_ops dccp_request_sock_ops = {
+ .family = PF_INET,
+ .obj_size = sizeof(struct dccp_request_sock),
+ .rtx_syn_ack = dccp_v4_send_response,
+ .send_ack = dccp_v4_reqsk_send_ack,
+ .destructor = dccp_v4_reqsk_destructor,
+ .send_reset = dccp_v4_ctl_send_reset,
+};
+
+struct proto dccp_v4_prot = {
+ .name = "DCCP",
+ .owner = THIS_MODULE,
+ .close = dccp_close,
+ .connect = dccp_v4_connect,
+ .disconnect = dccp_disconnect,
+ .ioctl = dccp_ioctl,
+ .init = dccp_v4_init_sock,
+ .setsockopt = dccp_setsockopt,
+ .getsockopt = dccp_getsockopt,
+ .sendmsg = dccp_sendmsg,
+ .recvmsg = dccp_recvmsg,
+ .backlog_rcv = dccp_v4_do_rcv,
+ .hash = dccp_v4_hash,
+ .unhash = dccp_v4_unhash,
+ .accept = inet_csk_accept,
+ .get_port = dccp_v4_get_port,
+ .shutdown = dccp_shutdown,
+ .destroy = dccp_v4_destroy_sock,
+ .orphan_count = &dccp_orphan_count,
+ .max_header = MAX_DCCP_HEADER,
+ .obj_size = sizeof(struct dccp_sock),
+ .rsk_prot = &dccp_request_sock_ops,
+ .twsk_obj_size = sizeof(struct inet_timewait_sock),
+};
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
new file mode 100644
index 000000000000..ce5dff4ac22e
--- /dev/null
+++ b/net/dccp/minisocks.c
@@ -0,0 +1,264 @@
+/*
+ * net/dccp/minisocks.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/skbuff.h>
+#include <linux/timer.h>
+
+#include <net/sock.h>
+#include <net/xfrm.h>
+#include <net/inet_timewait_sock.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+struct inet_timewait_death_row dccp_death_row = {
+ .sysctl_max_tw_buckets = NR_FILE * 2,
+ .period = DCCP_TIMEWAIT_LEN / INET_TWDR_TWKILL_SLOTS,
+ .death_lock = SPIN_LOCK_UNLOCKED,
+ .hashinfo = &dccp_hashinfo,
+ .tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0,
+ (unsigned long)&dccp_death_row),
+ .twkill_work = __WORK_INITIALIZER(dccp_death_row.twkill_work,
+ inet_twdr_twkill_work,
+ &dccp_death_row),
+/* Short-time timewait calendar */
+
+ .twcal_hand = -1,
+ .twcal_timer = TIMER_INITIALIZER(inet_twdr_twcal_tick, 0,
+ (unsigned long)&dccp_death_row),
+};
+
+void dccp_time_wait(struct sock *sk, int state, int timeo)
+{
+ struct inet_timewait_sock *tw = NULL;
+
+ if (dccp_death_row.tw_count < dccp_death_row.sysctl_max_tw_buckets)
+ tw = inet_twsk_alloc(sk, state);
+
+ if (tw != NULL) {
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
+
+ /* Linkage updates. */
+ __inet_twsk_hashdance(tw, sk, &dccp_hashinfo);
+
+ /* Get the TIME_WAIT timeout firing. */
+ if (timeo < rto)
+ timeo = rto;
+
+ tw->tw_timeout = DCCP_TIMEWAIT_LEN;
+ if (state == DCCP_TIME_WAIT)
+ timeo = DCCP_TIMEWAIT_LEN;
+
+ inet_twsk_schedule(tw, &dccp_death_row, timeo,
+ DCCP_TIMEWAIT_LEN);
+ inet_twsk_put(tw);
+ } else {
+ /* Sorry, if we're out of memory, just CLOSE this
+ * socket up. We've got bigger problems than
+ * non-graceful socket closings.
+ */
+ LIMIT_NETDEBUG(KERN_INFO "DCCP: time wait bucket "
+ "table overflow\n");
+ }
+
+ dccp_done(sk);
+}
+
+struct sock *dccp_create_openreq_child(struct sock *sk,
+ const struct request_sock *req,
+ const struct sk_buff *skb)
+{
+ /*
+ * Step 3: Process LISTEN state
+ *
+ * // Generate a new socket and switch to that socket
+ * Set S := new socket for this port pair
+ */
+ struct sock *newsk = inet_csk_clone(sk, req, GFP_ATOMIC);
+
+ if (newsk != NULL) {
+ const struct dccp_request_sock *dreq = dccp_rsk(req);
+ struct inet_connection_sock *newicsk = inet_csk(sk);
+ struct dccp_sock *newdp = dccp_sk(newsk);
+
+ newdp->dccps_hc_rx_ackpkts = NULL;
+ newdp->dccps_role = DCCP_ROLE_SERVER;
+ newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
+
+ if (newdp->dccps_options.dccpo_send_ack_vector) {
+ newdp->dccps_hc_rx_ackpkts =
+ dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
+ GFP_ATOMIC);
+ /*
+ * XXX: We're using the same CCIDs set on the parent,
+ * i.e. sk_clone copied the master sock and left the
+ * CCID pointers for this child, that is why we do the
+ * __ccid_get calls.
+ */
+ if (unlikely(newdp->dccps_hc_rx_ackpkts == NULL))
+ goto out_free;
+ }
+
+ if (unlikely(ccid_hc_rx_init(newdp->dccps_hc_rx_ccid,
+ newsk) != 0 ||
+ ccid_hc_tx_init(newdp->dccps_hc_tx_ccid,
+ newsk) != 0)) {
+ dccp_ackpkts_free(newdp->dccps_hc_rx_ackpkts);
+ ccid_hc_rx_exit(newdp->dccps_hc_rx_ccid, newsk);
+ ccid_hc_tx_exit(newdp->dccps_hc_tx_ccid, newsk);
+out_free:
+ /* It is still raw copy of parent, so invalidate
+ * destructor and make plain sk_free() */
+ newsk->sk_destruct = NULL;
+ sk_free(newsk);
+ return NULL;
+ }
+
+ __ccid_get(newdp->dccps_hc_rx_ccid);
+ __ccid_get(newdp->dccps_hc_tx_ccid);
+
+ /*
+ * Step 3: Process LISTEN state
+ *
+ * Choose S.ISS (initial seqno) or set from Init Cookie
+ * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init
+ * Cookie
+ */
+
+ /* See dccp_v4_conn_request */
+ newdp->dccps_options.dccpo_sequence_window = req->rcv_wnd;
+
+ newdp->dccps_gar = newdp->dccps_isr = dreq->dreq_isr;
+ dccp_update_gsr(newsk, dreq->dreq_isr);
+
+ newdp->dccps_iss = dreq->dreq_iss;
+ dccp_update_gss(newsk, dreq->dreq_iss);
+
+ /*
+ * SWL and AWL are initially adjusted so that they are not less than
+ * the initial Sequence Numbers received and sent, respectively:
+ * SWL := max(GSR + 1 - floor(W/4), ISR),
+ * AWL := max(GSS - W' + 1, ISS).
+ * These adjustments MUST be applied only at the beginning of the
+ * connection.
+ */
+ dccp_set_seqno(&newdp->dccps_swl,
+ max48(newdp->dccps_swl, newdp->dccps_isr));
+ dccp_set_seqno(&newdp->dccps_awl,
+ max48(newdp->dccps_awl, newdp->dccps_iss));
+
+ dccp_init_xmit_timers(newsk);
+
+ DCCP_INC_STATS_BH(DCCP_MIB_PASSIVEOPENS);
+ }
+ return newsk;
+}
+
+/*
+ * Process an incoming packet for RESPOND sockets represented
+ * as an request_sock.
+ */
+struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
+ struct request_sock *req,
+ struct request_sock **prev)
+{
+ struct sock *child = NULL;
+
+ /* Check for retransmitted REQUEST */
+ if (dccp_hdr(skb)->dccph_type == DCCP_PKT_REQUEST) {
+ if (after48(DCCP_SKB_CB(skb)->dccpd_seq,
+ dccp_rsk(req)->dreq_isr)) {
+ struct dccp_request_sock *dreq = dccp_rsk(req);
+
+ dccp_pr_debug("Retransmitted REQUEST\n");
+ /* Send another RESPONSE packet */
+ dccp_set_seqno(&dreq->dreq_iss, dreq->dreq_iss + 1);
+ dccp_set_seqno(&dreq->dreq_isr,
+ DCCP_SKB_CB(skb)->dccpd_seq);
+ req->rsk_ops->rtx_syn_ack(sk, req, NULL);
+ }
+ /* Network Duplicate, discard packet */
+ return NULL;
+ }
+
+ DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR;
+
+ if (dccp_hdr(skb)->dccph_type != DCCP_PKT_ACK &&
+ dccp_hdr(skb)->dccph_type != DCCP_PKT_DATAACK)
+ goto drop;
+
+ /* Invalid ACK */
+ if (DCCP_SKB_CB(skb)->dccpd_ack_seq != dccp_rsk(req)->dreq_iss) {
+ dccp_pr_debug("Invalid ACK number: ack_seq=%llu, "
+ "dreq_iss=%llu\n",
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ (unsigned long long)
+ dccp_rsk(req)->dreq_iss);
+ goto drop;
+ }
+
+ child = dccp_v4_request_recv_sock(sk, skb, req, NULL);
+ if (child == NULL)
+ goto listen_overflow;
+
+ /* FIXME: deal with options */
+
+ inet_csk_reqsk_queue_unlink(sk, req, prev);
+ inet_csk_reqsk_queue_removed(sk, req);
+ inet_csk_reqsk_queue_add(sk, req, child);
+out:
+ return child;
+listen_overflow:
+ dccp_pr_debug("listen_overflow!\n");
+ DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY;
+drop:
+ if (dccp_hdr(skb)->dccph_type != DCCP_PKT_RESET)
+ req->rsk_ops->send_reset(skb);
+
+ inet_csk_reqsk_queue_drop(sk, req, prev);
+ goto out;
+}
+
+/*
+ * Queue segment on the new socket if the new socket is active,
+ * otherwise we just shortcircuit this and continue with
+ * the new socket.
+ */
+int dccp_child_process(struct sock *parent, struct sock *child,
+ struct sk_buff *skb)
+{
+ int ret = 0;
+ const int state = child->sk_state;
+
+ if (!sock_owned_by_user(child)) {
+ ret = dccp_rcv_state_process(child, skb, dccp_hdr(skb),
+ skb->len);
+
+ /* Wakeup parent, send SIGIO */
+ if (state == DCCP_RESPOND && child->sk_state != state)
+ parent->sk_data_ready(parent, 0);
+ } else {
+ /* Alas, it is possible again, because we do lookup
+ * in main socket hash table and lock on listening
+ * socket does not protect us more.
+ */
+ sk_add_backlog(child, skb);
+ }
+
+ bh_unlock_sock(child);
+ sock_put(child);
+ return ret;
+}
diff --git a/net/dccp/options.c b/net/dccp/options.c
new file mode 100644
index 000000000000..382c5894acb2
--- /dev/null
+++ b/net/dccp/options.c
@@ -0,0 +1,855 @@
+/*
+ * net/dccp/options.c
+ *
+ * An implementation of the DCCP protocol
+ * Copyright (c) 2005 Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
+ struct sock *sk,
+ const u64 ackno,
+ const unsigned char len,
+ const unsigned char *vector);
+
+/* stores the default values for new connection. may be changed with sysctl */
+static const struct dccp_options dccpo_default_values = {
+ .dccpo_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW,
+ .dccpo_ccid = DCCPF_INITIAL_CCID,
+ .dccpo_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR,
+ .dccpo_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT,
+};
+
+void dccp_options_init(struct dccp_options *dccpo)
+{
+ memcpy(dccpo, &dccpo_default_values, sizeof(*dccpo));
+}
+
+static u32 dccp_decode_value_var(const unsigned char *bf, const u8 len)
+{
+ u32 value = 0;
+
+ if (len > 3)
+ value += *bf++ << 24;
+ if (len > 2)
+ value += *bf++ << 16;
+ if (len > 1)
+ value += *bf++ << 8;
+ if (len > 0)
+ value += *bf;
+
+ return value;
+}
+
+int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+#ifdef CONFIG_IP_DCCP_DEBUG
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx opt: " : "server rx opt: ";
+#endif
+ const struct dccp_hdr *dh = dccp_hdr(skb);
+ const u8 pkt_type = DCCP_SKB_CB(skb)->dccpd_type;
+ unsigned char *options = (unsigned char *)dh + dccp_hdr_len(skb);
+ unsigned char *opt_ptr = options;
+ const unsigned char *opt_end = (unsigned char *)dh +
+ (dh->dccph_doff * 4);
+ struct dccp_options_received *opt_recv = &dp->dccps_options_received;
+ unsigned char opt, len;
+ unsigned char *value;
+
+ memset(opt_recv, 0, sizeof(*opt_recv));
+
+ while (opt_ptr != opt_end) {
+ opt = *opt_ptr++;
+ len = 0;
+ value = NULL;
+
+ /* Check if this isn't a single byte option */
+ if (opt > DCCPO_MAX_RESERVED) {
+ if (opt_ptr == opt_end)
+ goto out_invalid_option;
+
+ len = *opt_ptr++;
+ if (len < 3)
+ goto out_invalid_option;
+ /*
+ * Remove the type and len fields, leaving
+ * just the value size
+ */
+ len -= 2;
+ value = opt_ptr;
+ opt_ptr += len;
+
+ if (opt_ptr > opt_end)
+ goto out_invalid_option;
+ }
+
+ switch (opt) {
+ case DCCPO_PADDING:
+ break;
+ case DCCPO_NDP_COUNT:
+ if (len > 3)
+ goto out_invalid_option;
+
+ opt_recv->dccpor_ndp = dccp_decode_value_var(value, len);
+ dccp_pr_debug("%sNDP count=%d\n", debug_prefix,
+ opt_recv->dccpor_ndp);
+ break;
+ case DCCPO_ACK_VECTOR_0:
+ if (len > DCCP_MAX_ACK_VECTOR_LEN)
+ goto out_invalid_option;
+
+ if (pkt_type == DCCP_PKT_DATA)
+ continue;
+
+ opt_recv->dccpor_ack_vector_len = len;
+ opt_recv->dccpor_ack_vector_idx = value - options;
+
+ dccp_pr_debug("%sACK vector 0, len=%d, ack_ackno=%llu\n",
+ debug_prefix, len,
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ dccp_ackvector_print(DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ value, len);
+ dccp_ackpkts_check_rcv_ackvector(dp->dccps_hc_rx_ackpkts,
+ sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ len, value);
+ break;
+ case DCCPO_TIMESTAMP:
+ if (len != 4)
+ goto out_invalid_option;
+
+ opt_recv->dccpor_timestamp = ntohl(*(u32 *)value);
+
+ dp->dccps_timestamp_echo = opt_recv->dccpor_timestamp;
+ do_gettimeofday(&dp->dccps_timestamp_time);
+
+ dccp_pr_debug("%sTIMESTAMP=%u, ackno=%llu\n",
+ debug_prefix, opt_recv->dccpor_timestamp,
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ break;
+ case DCCPO_TIMESTAMP_ECHO:
+ if (len != 4 && len != 6 && len != 8)
+ goto out_invalid_option;
+
+ opt_recv->dccpor_timestamp_echo = ntohl(*(u32 *)value);
+
+ dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, ackno=%llu, ",
+ debug_prefix,
+ opt_recv->dccpor_timestamp_echo,
+ len + 2,
+ (unsigned long long)
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
+
+ if (len > 4) {
+ if (len == 6)
+ opt_recv->dccpor_elapsed_time =
+ ntohs(*(u16 *)(value + 4));
+ else
+ opt_recv->dccpor_elapsed_time =
+ ntohl(*(u32 *)(value + 4));
+
+ dccp_pr_debug("%sTIMESTAMP_ECHO ELAPSED_TIME=%d\n",
+ debug_prefix,
+ opt_recv->dccpor_elapsed_time);
+ }
+ break;
+ case DCCPO_ELAPSED_TIME:
+ if (len != 2 && len != 4)
+ goto out_invalid_option;
+
+ if (pkt_type == DCCP_PKT_DATA)
+ continue;
+
+ if (len == 2)
+ opt_recv->dccpor_elapsed_time =
+ ntohs(*(u16 *)value);
+ else
+ opt_recv->dccpor_elapsed_time =
+ ntohl(*(u32 *)value);
+
+ dccp_pr_debug("%sELAPSED_TIME=%d\n", debug_prefix,
+ opt_recv->dccpor_elapsed_time);
+ break;
+ /*
+ * From draft-ietf-dccp-spec-11.txt:
+ *
+ * Option numbers 128 through 191 are for
+ * options sent from the HC-Sender to the
+ * HC-Receiver; option numbers 192 through 255
+ * are for options sent from the HC-Receiver to
+ * the HC-Sender.
+ */
+ case 128 ... 191: {
+ const u16 idx = value - options;
+
+ if (ccid_hc_rx_parse_options(dp->dccps_hc_rx_ccid, sk,
+ opt, len, idx,
+ value) != 0)
+ goto out_invalid_option;
+ }
+ break;
+ case 192 ... 255: {
+ const u16 idx = value - options;
+
+ if (ccid_hc_tx_parse_options(dp->dccps_hc_tx_ccid, sk,
+ opt, len, idx,
+ value) != 0)
+ goto out_invalid_option;
+ }
+ break;
+ default:
+ pr_info("DCCP(%p): option %d(len=%d) not "
+ "implemented, ignoring\n",
+ sk, opt, len);
+ break;
+ }
+ }
+
+ return 0;
+
+out_invalid_option:
+ DCCP_INC_STATS_BH(DCCP_MIB_INVALIDOPT);
+ DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_OPTION_ERROR;
+ pr_info("DCCP(%p): invalid option %d, len=%d\n", sk, opt, len);
+ return -1;
+}
+
+static void dccp_encode_value_var(const u32 value, unsigned char *to,
+ const unsigned int len)
+{
+ if (len > 3)
+ *to++ = (value & 0xFF000000) >> 24;
+ if (len > 2)
+ *to++ = (value & 0xFF0000) >> 16;
+ if (len > 1)
+ *to++ = (value & 0xFF00) >> 8;
+ if (len > 0)
+ *to++ = (value & 0xFF);
+}
+
+static inline int dccp_ndp_len(const int ndp)
+{
+ return likely(ndp <= 0xFF) ? 1 : ndp <= 0xFFFF ? 2 : 3;
+}
+
+void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
+ const unsigned char option,
+ const void *value, const unsigned char len)
+{
+ unsigned char *to;
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len + 2 > DCCP_MAX_OPT_LEN) {
+ LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to insert "
+ "%d option!\n", option);
+ return;
+ }
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len + 2;
+
+ to = skb_push(skb, len + 2);
+ *to++ = option;
+ *to++ = len + 2;
+
+ memcpy(to, value, len);
+}
+
+EXPORT_SYMBOL_GPL(dccp_insert_option);
+
+static void dccp_insert_option_ndp(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ int ndp = dp->dccps_ndp_count;
+
+ if (dccp_non_data_packet(skb))
+ ++dp->dccps_ndp_count;
+ else
+ dp->dccps_ndp_count = 0;
+
+ if (ndp > 0) {
+ unsigned char *ptr;
+ const int ndp_len = dccp_ndp_len(ndp);
+ const int len = ndp_len + 2;
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
+ return;
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len;
+
+ ptr = skb_push(skb, len);
+ *ptr++ = DCCPO_NDP_COUNT;
+ *ptr++ = len;
+ dccp_encode_value_var(ndp, ptr, ndp_len);
+ }
+}
+
+static inline int dccp_elapsed_time_len(const u32 elapsed_time)
+{
+ return elapsed_time == 0 ? 0 : elapsed_time <= 0xFFFF ? 2 : 4;
+}
+
+void dccp_insert_option_elapsed_time(struct sock *sk,
+ struct sk_buff *skb,
+ u32 elapsed_time)
+{
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT TX opt: " : "server TX opt: ";
+#endif
+ const int elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
+ const int len = 2 + elapsed_time_len;
+ unsigned char *to;
+
+ if (elapsed_time_len == 0)
+ return;
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
+ LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to "
+ "insert elapsed time!\n");
+ return;
+ }
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len;
+
+ to = skb_push(skb, len);
+ *to++ = DCCPO_ELAPSED_TIME;
+ *to++ = len;
+
+ if (elapsed_time_len == 2) {
+ const u16 var16 = htons((u16)elapsed_time);
+ memcpy(to, &var16, 2);
+ } else {
+ const u32 var32 = htonl(elapsed_time);
+ memcpy(to, &var32, 4);
+ }
+
+ dccp_pr_debug("%sELAPSED_TIME=%u, len=%d, seqno=%llu\n",
+ debug_prefix, elapsed_time,
+ len,
+ (unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
+}
+
+EXPORT_SYMBOL_GPL(dccp_insert_option_elapsed_time);
+
+static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+#ifdef CONFIG_IP_DCCP_DEBUG
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT TX opt: " : "server TX opt: ";
+#endif
+ struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
+ int len = ap->dccpap_buf_vector_len + 2;
+ const u32 elapsed_time = timeval_now_delta(&ap->dccpap_time) / 10;
+ unsigned char *to, *from;
+
+ if (elapsed_time != 0)
+ dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
+ LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to "
+ "insert ACK Vector!\n");
+ return;
+ }
+
+ /*
+ * XXX: now we have just one ack vector sent record, so
+ * we have to wait for it to be cleared.
+ *
+ * Of course this is not acceptable, but this is just for
+ * basic testing now.
+ */
+ if (ap->dccpap_ack_seqno != DCCP_MAX_SEQNO + 1)
+ return;
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len;
+
+ to = skb_push(skb, len);
+ *to++ = DCCPO_ACK_VECTOR_0;
+ *to++ = len;
+
+ len = ap->dccpap_buf_vector_len;
+ from = ap->dccpap_buf + ap->dccpap_buf_head;
+
+ /* Check if buf_head wraps */
+ if (ap->dccpap_buf_head + len > ap->dccpap_buf_len) {
+ const unsigned int tailsize = (ap->dccpap_buf_len -
+ ap->dccpap_buf_head);
+
+ memcpy(to, from, tailsize);
+ to += tailsize;
+ len -= tailsize;
+ from = ap->dccpap_buf;
+ }
+
+ memcpy(to, from, len);
+ /*
+ * From draft-ietf-dccp-spec-11.txt:
+ *
+ * For each acknowledgement it sends, the HC-Receiver will add an
+ * acknowledgement record. ack_seqno will equal the HC-Receiver
+ * sequence number it used for the ack packet; ack_ptr will equal
+ * buf_head; ack_ackno will equal buf_ackno; and ack_nonce will
+ * equal buf_nonce.
+ *
+ * This implemention uses just one ack record for now.
+ */
+ ap->dccpap_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
+ ap->dccpap_ack_ptr = ap->dccpap_buf_head;
+ ap->dccpap_ack_ackno = ap->dccpap_buf_ackno;
+ ap->dccpap_ack_nonce = ap->dccpap_buf_nonce;
+ ap->dccpap_ack_vector_len = ap->dccpap_buf_vector_len;
+
+ dccp_pr_debug("%sACK Vector 0, len=%d, ack_seqno=%llu, "
+ "ack_ackno=%llu\n",
+ debug_prefix, ap->dccpap_ack_vector_len,
+ (unsigned long long) ap->dccpap_ack_seqno,
+ (unsigned long long) ap->dccpap_ack_ackno);
+}
+
+void dccp_insert_option_timestamp(struct sock *sk, struct sk_buff *skb)
+{
+ struct timeval tv;
+ u32 now;
+
+ do_gettimeofday(&tv);
+ now = (tv.tv_sec * USEC_PER_SEC + tv.tv_usec) / 10;
+ /* yes this will overflow but that is the point as we want a
+ * 10 usec 32 bit timer which mean it wraps every 11.9 hours */
+
+ now = htonl(now);
+ dccp_insert_option(sk, skb, DCCPO_TIMESTAMP, &now, sizeof(now));
+}
+
+EXPORT_SYMBOL_GPL(dccp_insert_option_timestamp);
+
+static void dccp_insert_option_timestamp_echo(struct sock *sk,
+ struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+#ifdef CONFIG_IP_DCCP_DEBUG
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT TX opt: " : "server TX opt: ";
+#endif
+ u32 tstamp_echo;
+ const u32 elapsed_time =
+ timeval_now_delta(&dp->dccps_timestamp_time) / 10;
+ const int elapsed_time_len = dccp_elapsed_time_len(elapsed_time);
+ const int len = 6 + elapsed_time_len;
+ unsigned char *to;
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
+ LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to insert "
+ "timestamp echo!\n");
+ return;
+ }
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len;
+
+ to = skb_push(skb, len);
+ *to++ = DCCPO_TIMESTAMP_ECHO;
+ *to++ = len;
+
+ tstamp_echo = htonl(dp->dccps_timestamp_echo);
+ memcpy(to, &tstamp_echo, 4);
+ to += 4;
+
+ if (elapsed_time_len == 2) {
+ const u16 var16 = htons((u16)elapsed_time);
+ memcpy(to, &var16, 2);
+ } else if (elapsed_time_len == 4) {
+ const u32 var32 = htonl(elapsed_time);
+ memcpy(to, &var32, 4);
+ }
+
+ dccp_pr_debug("%sTIMESTAMP_ECHO=%u, len=%d, seqno=%llu\n",
+ debug_prefix, dp->dccps_timestamp_echo,
+ len,
+ (unsigned long long) DCCP_SKB_CB(skb)->dccpd_seq);
+
+ dp->dccps_timestamp_echo = 0;
+ dp->dccps_timestamp_time.tv_sec = 0;
+ dp->dccps_timestamp_time.tv_usec = 0;
+}
+
+void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len = 0;
+
+ if (dp->dccps_options.dccpo_send_ndp_count)
+ dccp_insert_option_ndp(sk, skb);
+
+ if (!dccp_packet_without_ack(skb)) {
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ (dp->dccps_hc_rx_ackpkts->dccpap_buf_ackno !=
+ DCCP_MAX_SEQNO + 1))
+ dccp_insert_option_ack_vector(sk, skb);
+
+ if (dp->dccps_timestamp_echo != 0)
+ dccp_insert_option_timestamp_echo(sk, skb);
+ }
+
+ ccid_hc_rx_insert_options(dp->dccps_hc_rx_ccid, sk, skb);
+ ccid_hc_tx_insert_options(dp->dccps_hc_tx_ccid, sk, skb);
+
+ /* XXX: insert other options when appropriate */
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len != 0) {
+ /* The length of all options has to be a multiple of 4 */
+ int padding = DCCP_SKB_CB(skb)->dccpd_opt_len % 4;
+
+ if (padding != 0) {
+ padding = 4 - padding;
+ memset(skb_push(skb, padding), 0, padding);
+ DCCP_SKB_CB(skb)->dccpd_opt_len += padding;
+ }
+ }
+}
+
+struct dccp_ackpkts *dccp_ackpkts_alloc(const unsigned int len,
+ const unsigned int __nocast priority)
+{
+ struct dccp_ackpkts *ap = kmalloc(sizeof(*ap) + len, priority);
+
+ if (ap != NULL) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ memset(ap->dccpap_buf, 0xFF, len);
+#endif
+ ap->dccpap_buf_len = len;
+ ap->dccpap_buf_head =
+ ap->dccpap_buf_tail =
+ ap->dccpap_buf_len - 1;
+ ap->dccpap_buf_ackno =
+ ap->dccpap_ack_ackno =
+ ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
+ ap->dccpap_buf_nonce = ap->dccpap_buf_nonce = 0;
+ ap->dccpap_ack_ptr = 0;
+ ap->dccpap_time.tv_sec = 0;
+ ap->dccpap_time.tv_usec = 0;
+ ap->dccpap_buf_vector_len = ap->dccpap_ack_vector_len = 0;
+ }
+
+ return ap;
+}
+
+void dccp_ackpkts_free(struct dccp_ackpkts *ap)
+{
+ if (ap != NULL) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ memset(ap, 0xFF, sizeof(*ap) + ap->dccpap_buf_len);
+#endif
+ kfree(ap);
+ }
+}
+
+static inline u8 dccp_ackpkts_state(const struct dccp_ackpkts *ap,
+ const unsigned int index)
+{
+ return ap->dccpap_buf[index] & DCCP_ACKPKTS_STATE_MASK;
+}
+
+static inline u8 dccp_ackpkts_len(const struct dccp_ackpkts *ap,
+ const unsigned int index)
+{
+ return ap->dccpap_buf[index] & DCCP_ACKPKTS_LEN_MASK;
+}
+
+/*
+ * If several packets are missing, the HC-Receiver may prefer to enter multiple
+ * bytes with run length 0, rather than a single byte with a larger run length;
+ * this simplifies table updates if one of the missing packets arrives.
+ */
+static inline int dccp_ackpkts_set_buf_head_state(struct dccp_ackpkts *ap,
+ const unsigned int packets,
+ const unsigned char state)
+{
+ unsigned int gap;
+ signed long new_head;
+
+ if (ap->dccpap_buf_vector_len + packets > ap->dccpap_buf_len)
+ return -ENOBUFS;
+
+ gap = packets - 1;
+ new_head = ap->dccpap_buf_head - packets;
+
+ if (new_head < 0) {
+ if (gap > 0) {
+ memset(ap->dccpap_buf, DCCP_ACKPKTS_STATE_NOT_RECEIVED,
+ gap + new_head + 1);
+ gap = -new_head;
+ }
+ new_head += ap->dccpap_buf_len;
+ }
+
+ ap->dccpap_buf_head = new_head;
+
+ if (gap > 0)
+ memset(ap->dccpap_buf + ap->dccpap_buf_head + 1,
+ DCCP_ACKPKTS_STATE_NOT_RECEIVED, gap);
+
+ ap->dccpap_buf[ap->dccpap_buf_head] = state;
+ ap->dccpap_buf_vector_len += packets;
+ return 0;
+}
+
+/*
+ * Implements the draft-ietf-dccp-spec-11.txt Appendix A
+ */
+int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state)
+{
+ /*
+ * Check at the right places if the buffer is full, if it is, tell the
+ * caller to start dropping packets till the HC-Sender acks our ACK
+ * vectors, when we will free up space in dccpap_buf.
+ *
+ * We may well decide to do buffer compression, etc, but for now lets
+ * just drop.
+ *
+ * From Appendix A:
+ *
+ * Of course, the circular buffer may overflow, either when the
+ * HC-Sender is sending data at a very high rate, when the
+ * HC-Receiver's acknowledgements are not reaching the HC-Sender,
+ * or when the HC-Sender is forgetting to acknowledge those acks
+ * (so the HC-Receiver is unable to clean up old state). In this
+ * case, the HC-Receiver should either compress the buffer (by
+ * increasing run lengths when possible), transfer its state to
+ * a larger buffer, or, as a last resort, drop all received
+ * packets, without processing them whatsoever, until its buffer
+ * shrinks again.
+ */
+
+ /* See if this is the first ackno being inserted */
+ if (ap->dccpap_buf_vector_len == 0) {
+ ap->dccpap_buf[ap->dccpap_buf_head] = state;
+ ap->dccpap_buf_vector_len = 1;
+ } else if (after48(ackno, ap->dccpap_buf_ackno)) {
+ const u64 delta = dccp_delta_seqno(ap->dccpap_buf_ackno,
+ ackno);
+
+ /*
+ * Look if the state of this packet is the same as the
+ * previous ackno and if so if we can bump the head len.
+ */
+ if (delta == 1 &&
+ dccp_ackpkts_state(ap, ap->dccpap_buf_head) == state &&
+ (dccp_ackpkts_len(ap, ap->dccpap_buf_head) <
+ DCCP_ACKPKTS_LEN_MASK))
+ ap->dccpap_buf[ap->dccpap_buf_head]++;
+ else if (dccp_ackpkts_set_buf_head_state(ap, delta, state))
+ return -ENOBUFS;
+ } else {
+ /*
+ * A.1.2. Old Packets
+ *
+ * When a packet with Sequence Number S arrives, and
+ * S <= buf_ackno, the HC-Receiver will scan the table
+ * for the byte corresponding to S. (Indexing structures
+ * could reduce the complexity of this scan.)
+ */
+ u64 delta = dccp_delta_seqno(ackno, ap->dccpap_buf_ackno);
+ unsigned int index = ap->dccpap_buf_head;
+
+ while (1) {
+ const u8 len = dccp_ackpkts_len(ap, index);
+ const u8 state = dccp_ackpkts_state(ap, index);
+ /*
+ * valid packets not yet in dccpap_buf have a reserved
+ * entry, with a len equal to 0.
+ */
+ if (state == DCCP_ACKPKTS_STATE_NOT_RECEIVED &&
+ len == 0 && delta == 0) { /* Found our
+ reserved seat! */
+ dccp_pr_debug("Found %llu reserved seat!\n",
+ (unsigned long long) ackno);
+ ap->dccpap_buf[index] = state;
+ goto out;
+ }
+ /* len == 0 means one packet */
+ if (delta < len + 1)
+ goto out_duplicate;
+
+ delta -= len + 1;
+ if (++index == ap->dccpap_buf_len)
+ index = 0;
+ }
+ }
+
+ ap->dccpap_buf_ackno = ackno;
+ do_gettimeofday(&ap->dccpap_time);
+out:
+ dccp_pr_debug("");
+ dccp_ackpkts_print(ap);
+ return 0;
+
+out_duplicate:
+ /* Duplicate packet */
+ dccp_pr_debug("Received a dup or already considered lost "
+ "packet: %llu\n", (unsigned long long) ackno);
+ return -EILSEQ;
+}
+
+#ifdef CONFIG_IP_DCCP_DEBUG
+void dccp_ackvector_print(const u64 ackno, const unsigned char *vector,
+ int len)
+{
+ if (!dccp_debug)
+ return;
+
+ printk("ACK vector len=%d, ackno=%llu |", len,
+ (unsigned long long) ackno);
+
+ while (len--) {
+ const u8 state = (*vector & DCCP_ACKPKTS_STATE_MASK) >> 6;
+ const u8 rl = (*vector & DCCP_ACKPKTS_LEN_MASK);
+
+ printk("%d,%d|", state, rl);
+ ++vector;
+ }
+
+ printk("\n");
+}
+
+void dccp_ackpkts_print(const struct dccp_ackpkts *ap)
+{
+ dccp_ackvector_print(ap->dccpap_buf_ackno,
+ ap->dccpap_buf + ap->dccpap_buf_head,
+ ap->dccpap_buf_vector_len);
+}
+#endif
+
+static void dccp_ackpkts_trow_away_ack_record(struct dccp_ackpkts *ap)
+{
+ /*
+ * As we're keeping track of the ack vector size
+ * (dccpap_buf_vector_len) and the sent ack vector size
+ * (dccpap_ack_vector_len) we don't need dccpap_buf_tail at all, but
+ * keep this code here as in the future we'll implement a vector of
+ * ack records, as suggested in draft-ietf-dccp-spec-11.txt
+ * Appendix A. -acme
+ */
+#if 0
+ ap->dccpap_buf_tail = ap->dccpap_ack_ptr + 1;
+ if (ap->dccpap_buf_tail >= ap->dccpap_buf_len)
+ ap->dccpap_buf_tail -= ap->dccpap_buf_len;
+#endif
+ ap->dccpap_buf_vector_len -= ap->dccpap_ack_vector_len;
+}
+
+void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap, struct sock *sk,
+ u64 ackno)
+{
+ /* Check if we actually sent an ACK vector */
+ if (ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1)
+ return;
+
+ if (ackno == ap->dccpap_ack_seqno) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx ack: " : "server rx ack: ";
+#endif
+ dccp_pr_debug("%sACK packet 0, len=%d, ack_seqno=%llu, "
+ "ack_ackno=%llu, ACKED!\n",
+ debug_prefix, 1,
+ (unsigned long long) ap->dccpap_ack_seqno,
+ (unsigned long long) ap->dccpap_ack_ackno);
+ dccp_ackpkts_trow_away_ack_record(ap);
+ ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
+ }
+}
+
+static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
+ struct sock *sk, u64 ackno,
+ const unsigned char len,
+ const unsigned char *vector)
+{
+ unsigned char i;
+
+ /* Check if we actually sent an ACK vector */
+ if (ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1)
+ return;
+ /*
+ * We're in the receiver half connection, so if the received an ACK
+ * vector ackno (e.g. 50) before dccpap_ack_seqno (e.g. 52), we're
+ * not interested.
+ *
+ * Extra explanation with example:
+ *
+ * if we received an ACK vector with ackno 50, it can only be acking
+ * 50, 49, 48, etc, not 52 (the seqno for the ACK vector we sent).
+ */
+ /* dccp_pr_debug("is %llu < %llu? ", ackno, ap->dccpap_ack_seqno); */
+ if (before48(ackno, ap->dccpap_ack_seqno)) {
+ /* dccp_pr_debug_cat("yes\n"); */
+ return;
+ }
+ /* dccp_pr_debug_cat("no\n"); */
+
+ i = len;
+ while (i--) {
+ const u8 rl = (*vector & DCCP_ACKPKTS_LEN_MASK);
+ u64 ackno_end_rl;
+
+ dccp_set_seqno(&ackno_end_rl, ackno - rl);
+
+ /*
+ * dccp_pr_debug("is %llu <= %llu <= %llu? ", ackno_end_rl,
+ * ap->dccpap_ack_seqno, ackno);
+ */
+ if (between48(ap->dccpap_ack_seqno, ackno_end_rl, ackno)) {
+ const u8 state = (*vector &
+ DCCP_ACKPKTS_STATE_MASK) >> 6;
+ /* dccp_pr_debug_cat("yes\n"); */
+
+ if (state != DCCP_ACKPKTS_STATE_NOT_RECEIVED) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix =
+ dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx ack: " : "server rx ack: ";
+#endif
+ dccp_pr_debug("%sACK vector 0, len=%d, "
+ "ack_seqno=%llu, ack_ackno=%llu, "
+ "ACKED!\n",
+ debug_prefix, len,
+ (unsigned long long)
+ ap->dccpap_ack_seqno,
+ (unsigned long long)
+ ap->dccpap_ack_ackno);
+ dccp_ackpkts_trow_away_ack_record(ap);
+ }
+ /*
+ * If dccpap_ack_seqno was not received, no problem
+ * we'll send another ACK vector.
+ */
+ ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
+ break;
+ }
+ /* dccp_pr_debug_cat("no\n"); */
+
+ dccp_set_seqno(&ackno, ackno_end_rl - 1);
+ ++vector;
+ }
+}
diff --git a/net/dccp/output.c b/net/dccp/output.c
new file mode 100644
index 000000000000..28de157a4326
--- /dev/null
+++ b/net/dccp/output.c
@@ -0,0 +1,528 @@
+/*
+ * net/dccp/output.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/skbuff.h>
+
+#include <net/sock.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+static inline void dccp_event_ack_sent(struct sock *sk)
+{
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
+}
+
+/*
+ * All SKB's seen here are completely headerless. It is our
+ * job to build the DCCP header, and pass the packet down to
+ * IP so it can do the same plus pass the packet off to the
+ * device.
+ */
+int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
+{
+ if (likely(skb != NULL)) {
+ const struct inet_sock *inet = inet_sk(sk);
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
+ struct dccp_hdr *dh;
+ /* XXX For now we're using only 48 bits sequence numbers */
+ const int dccp_header_size = sizeof(*dh) +
+ sizeof(struct dccp_hdr_ext) +
+ dccp_packet_hdr_len(dcb->dccpd_type);
+ int err, set_ack = 1;
+ u64 ackno = dp->dccps_gsr;
+
+ dccp_inc_seqno(&dp->dccps_gss);
+
+ switch (dcb->dccpd_type) {
+ case DCCP_PKT_DATA:
+ set_ack = 0;
+ break;
+ case DCCP_PKT_SYNC:
+ case DCCP_PKT_SYNCACK:
+ ackno = dcb->dccpd_seq;
+ break;
+ }
+
+ dcb->dccpd_seq = dp->dccps_gss;
+ dccp_insert_options(sk, skb);
+
+ skb->h.raw = skb_push(skb, dccp_header_size);
+ dh = dccp_hdr(skb);
+ /*
+ * Data packets are not cloned as they are never retransmitted
+ */
+ if (skb_cloned(skb))
+ skb_set_owner_w(skb, sk);
+
+ /* Build DCCP header and checksum it. */
+ memset(dh, 0, dccp_header_size);
+ dh->dccph_type = dcb->dccpd_type;
+ dh->dccph_sport = inet->sport;
+ dh->dccph_dport = inet->dport;
+ dh->dccph_doff = (dccp_header_size + dcb->dccpd_opt_len) / 4;
+ dh->dccph_ccval = dcb->dccpd_ccval;
+ /* XXX For now we're using only 48 bits sequence numbers */
+ dh->dccph_x = 1;
+
+ dp->dccps_awh = dp->dccps_gss;
+ dccp_hdr_set_seq(dh, dp->dccps_gss);
+ if (set_ack)
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), ackno);
+
+ switch (dcb->dccpd_type) {
+ case DCCP_PKT_REQUEST:
+ dccp_hdr_request(skb)->dccph_req_service =
+ dcb->dccpd_service;
+ break;
+ case DCCP_PKT_RESET:
+ dccp_hdr_reset(skb)->dccph_reset_code =
+ dcb->dccpd_reset_code;
+ break;
+ }
+
+ dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr,
+ inet->daddr);
+
+ if (set_ack)
+ dccp_event_ack_sent(sk);
+
+ DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
+
+ err = ip_queue_xmit(skb, 0);
+ if (err <= 0)
+ return err;
+
+ /* NET_XMIT_CN is special. It does not guarantee,
+ * that this packet is lost. It tells that device
+ * is about to start to drop packets or already
+ * drops some packets of the same priority and
+ * invokes us to send less aggressively.
+ */
+ return err == NET_XMIT_CN ? 0 : err;
+ }
+ return -ENOBUFS;
+}
+
+unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ int mss_now;
+
+ /*
+ * FIXME: we really should be using the af_specific thing to support
+ * IPv6.
+ * mss_now = pmtu - tp->af_specific->net_header_len -
+ * sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext);
+ */
+ mss_now = pmtu - sizeof(struct iphdr) - sizeof(struct dccp_hdr) -
+ sizeof(struct dccp_hdr_ext);
+
+ /* Now subtract optional transport overhead */
+ mss_now -= dp->dccps_ext_header_len;
+
+ /*
+ * FIXME: this should come from the CCID infrastructure, where, say,
+ * TFRC will say it wants TIMESTAMPS, ELAPSED time, etc, for now lets
+ * put a rough estimate for NDP + TIMESTAMP + TIMESTAMP_ECHO + ELAPSED
+ * TIME + TFRC_OPT_LOSS_EVENT_RATE + TFRC_OPT_RECEIVE_RATE + padding to
+ * make it a multiple of 4
+ */
+
+ mss_now -= ((5 + 6 + 10 + 6 + 6 + 6 + 3) / 4) * 4;
+
+ /* And store cached results */
+ dp->dccps_pmtu_cookie = pmtu;
+ dp->dccps_mss_cache = mss_now;
+
+ return mss_now;
+}
+
+void dccp_write_space(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+ /* Should agree with poll, otherwise some programs break */
+ if (sock_writeable(sk))
+ sk_wake_async(sk, 2, POLL_OUT);
+
+ read_unlock(&sk->sk_callback_lock);
+}
+
+/**
+ * dccp_wait_for_ccid - Wait for ccid to tell us we can send a packet
+ * @sk: socket to wait for
+ * @timeo: for how long
+ */
+static int dccp_wait_for_ccid(struct sock *sk, struct sk_buff *skb,
+ long *timeo)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ DEFINE_WAIT(wait);
+ long delay;
+ int rc;
+
+ while (1) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+
+ if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
+ goto do_error;
+ if (!*timeo)
+ goto do_nonblock;
+ if (signal_pending(current))
+ goto do_interrupted;
+
+ rc = ccid_hc_tx_send_packet(dp->dccps_hc_tx_ccid, sk, skb,
+ skb->len);
+ if (rc <= 0)
+ break;
+ delay = msecs_to_jiffies(rc);
+ if (delay > *timeo || delay < 0)
+ goto do_nonblock;
+
+ sk->sk_write_pending++;
+ release_sock(sk);
+ *timeo -= schedule_timeout(delay);
+ lock_sock(sk);
+ sk->sk_write_pending--;
+ }
+out:
+ finish_wait(sk->sk_sleep, &wait);
+ return rc;
+
+do_error:
+ rc = -EPIPE;
+ goto out;
+do_nonblock:
+ rc = -EAGAIN;
+ goto out;
+do_interrupted:
+ rc = sock_intr_errno(*timeo);
+ goto out;
+}
+
+int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ int err = ccid_hc_tx_send_packet(dp->dccps_hc_tx_ccid, sk, skb,
+ skb->len);
+
+ if (err > 0)
+ err = dccp_wait_for_ccid(sk, skb, timeo);
+
+ if (err == 0) {
+ const struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
+ const int len = skb->len;
+
+ if (sk->sk_state == DCCP_PARTOPEN) {
+ /* See 8.1.5. Handshake Completion */
+ inet_csk_schedule_ack(sk);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ inet_csk(sk)->icsk_rto,
+ DCCP_RTO_MAX);
+ dcb->dccpd_type = DCCP_PKT_DATAACK;
+ /*
+ * FIXME: we really should have a
+ * dccps_ack_pending or use icsk.
+ */
+ } else if (inet_csk_ack_scheduled(sk) ||
+ dp->dccps_timestamp_echo != 0 ||
+ (dp->dccps_options.dccpo_send_ack_vector &&
+ ap->dccpap_buf_ackno != DCCP_MAX_SEQNO + 1 &&
+ ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1))
+ dcb->dccpd_type = DCCP_PKT_DATAACK;
+ else
+ dcb->dccpd_type = DCCP_PKT_DATA;
+
+ err = dccp_transmit_skb(sk, skb);
+ ccid_hc_tx_packet_sent(dp->dccps_hc_tx_ccid, sk, 0, len);
+ }
+
+ return err;
+}
+
+int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
+{
+ if (inet_sk_rebuild_header(sk) != 0)
+ return -EHOSTUNREACH; /* Routing failure or similar. */
+
+ return dccp_transmit_skb(sk, (skb_cloned(skb) ?
+ pskb_copy(skb, GFP_ATOMIC):
+ skb_clone(skb, GFP_ATOMIC)));
+}
+
+struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
+ struct request_sock *req)
+{
+ struct dccp_hdr *dh;
+ const int dccp_header_size = sizeof(struct dccp_hdr) +
+ sizeof(struct dccp_hdr_ext) +
+ sizeof(struct dccp_hdr_response);
+ struct sk_buff *skb = sock_wmalloc(sk, MAX_HEADER + DCCP_MAX_OPT_LEN +
+ dccp_header_size, 1,
+ GFP_ATOMIC);
+ if (skb == NULL)
+ return NULL;
+
+ /* Reserve space for headers. */
+ skb_reserve(skb, MAX_HEADER + DCCP_MAX_OPT_LEN + dccp_header_size);
+
+ skb->dst = dst_clone(dst);
+ skb->csum = 0;
+
+ DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_RESPONSE;
+ DCCP_SKB_CB(skb)->dccpd_seq = dccp_rsk(req)->dreq_iss;
+ dccp_insert_options(sk, skb);
+
+ skb->h.raw = skb_push(skb, dccp_header_size);
+
+ dh = dccp_hdr(skb);
+ memset(dh, 0, dccp_header_size);
+
+ dh->dccph_sport = inet_sk(sk)->sport;
+ dh->dccph_dport = inet_rsk(req)->rmt_port;
+ dh->dccph_doff = (dccp_header_size +
+ DCCP_SKB_CB(skb)->dccpd_opt_len) / 4;
+ dh->dccph_type = DCCP_PKT_RESPONSE;
+ dh->dccph_x = 1;
+ dccp_hdr_set_seq(dh, dccp_rsk(req)->dreq_iss);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dccp_rsk(req)->dreq_isr);
+
+ dh->dccph_checksum = dccp_v4_checksum(skb, inet_rsk(req)->loc_addr,
+ inet_rsk(req)->rmt_addr);
+
+ DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
+ return skb;
+}
+
+struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
+ const enum dccp_reset_codes code)
+
+{
+ struct dccp_hdr *dh;
+ struct dccp_sock *dp = dccp_sk(sk);
+ const int dccp_header_size = sizeof(struct dccp_hdr) +
+ sizeof(struct dccp_hdr_ext) +
+ sizeof(struct dccp_hdr_reset);
+ struct sk_buff *skb = sock_wmalloc(sk, MAX_HEADER + DCCP_MAX_OPT_LEN +
+ dccp_header_size, 1,
+ GFP_ATOMIC);
+ if (skb == NULL)
+ return NULL;
+
+ /* Reserve space for headers. */
+ skb_reserve(skb, MAX_HEADER + DCCP_MAX_OPT_LEN + dccp_header_size);
+
+ skb->dst = dst_clone(dst);
+ skb->csum = 0;
+
+ dccp_inc_seqno(&dp->dccps_gss);
+
+ DCCP_SKB_CB(skb)->dccpd_reset_code = code;
+ DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_RESET;
+ DCCP_SKB_CB(skb)->dccpd_seq = dp->dccps_gss;
+ dccp_insert_options(sk, skb);
+
+ skb->h.raw = skb_push(skb, dccp_header_size);
+
+ dh = dccp_hdr(skb);
+ memset(dh, 0, dccp_header_size);
+
+ dh->dccph_sport = inet_sk(sk)->sport;
+ dh->dccph_dport = inet_sk(sk)->dport;
+ dh->dccph_doff = (dccp_header_size +
+ DCCP_SKB_CB(skb)->dccpd_opt_len) / 4;
+ dh->dccph_type = DCCP_PKT_RESET;
+ dh->dccph_x = 1;
+ dccp_hdr_set_seq(dh, dp->dccps_gss);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dp->dccps_gsr);
+
+ dccp_hdr_reset(skb)->dccph_reset_code = code;
+
+ dh->dccph_checksum = dccp_v4_checksum(skb, inet_sk(sk)->saddr,
+ inet_sk(sk)->daddr);
+
+ DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
+ return skb;
+}
+
+/*
+ * Do all connect socket setups that can be done AF independent.
+ */
+static inline void dccp_connect_init(struct sock *sk)
+{
+ struct dst_entry *dst = __sk_dst_get(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ sk->sk_err = 0;
+ sock_reset_flag(sk, SOCK_DONE);
+
+ dccp_sync_mss(sk, dst_mtu(dst));
+
+ /*
+ * FIXME: set dp->{dccps_swh,dccps_swl}, with
+ * something like dccp_inc_seq
+ */
+
+ icsk->icsk_retransmits = 0;
+}
+
+int dccp_connect(struct sock *sk)
+{
+ struct sk_buff *skb;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ dccp_connect_init(sk);
+
+ skb = alloc_skb(MAX_DCCP_HEADER + 15, sk->sk_allocation);
+ if (unlikely(skb == NULL))
+ return -ENOBUFS;
+
+ /* Reserve space for headers. */
+ skb_reserve(skb, MAX_DCCP_HEADER);
+
+ DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_REQUEST;
+ /* FIXME: set service to something meaningful, coming
+ * from userspace*/
+ DCCP_SKB_CB(skb)->dccpd_service = 0;
+ skb->csum = 0;
+ skb_set_owner_w(skb, sk);
+
+ BUG_TRAP(sk->sk_send_head == NULL);
+ sk->sk_send_head = skb;
+ dccp_transmit_skb(sk, skb_clone(skb, GFP_KERNEL));
+ DCCP_INC_STATS(DCCP_MIB_ACTIVEOPENS);
+
+ /* Timer for repeating the REQUEST until an answer. */
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ icsk->icsk_rto, DCCP_RTO_MAX);
+ return 0;
+}
+
+void dccp_send_ack(struct sock *sk)
+{
+ /* If we have been reset, we may not send again. */
+ if (sk->sk_state != DCCP_CLOSED) {
+ struct sk_buff *skb = alloc_skb(MAX_DCCP_HEADER, GFP_ATOMIC);
+
+ if (skb == NULL) {
+ inet_csk_schedule_ack(sk);
+ inet_csk(sk)->icsk_ack.ato = TCP_ATO_MIN;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ TCP_DELACK_MAX,
+ DCCP_RTO_MAX);
+ return;
+ }
+
+ /* Reserve space for headers */
+ skb_reserve(skb, MAX_DCCP_HEADER);
+ skb->csum = 0;
+ DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_ACK;
+ skb_set_owner_w(skb, sk);
+ dccp_transmit_skb(sk, skb);
+ }
+}
+
+EXPORT_SYMBOL_GPL(dccp_send_ack);
+
+void dccp_send_delayed_ack(struct sock *sk)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ /*
+ * FIXME: tune this timer. elapsed time fixes the skew, so no problem
+ * with using 2s, and active senders also piggyback the ACK into a
+ * DATAACK packet, so this is really for quiescent senders.
+ */
+ unsigned long timeout = jiffies + 2 * HZ;
+
+ /* Use new timeout only if there wasn't a older one earlier. */
+ if (icsk->icsk_ack.pending & ICSK_ACK_TIMER) {
+ /* If delack timer was blocked or is about to expire,
+ * send ACK now.
+ *
+ * FIXME: check the "about to expire" part
+ */
+ if (icsk->icsk_ack.blocked) {
+ dccp_send_ack(sk);
+ return;
+ }
+
+ if (!time_before(timeout, icsk->icsk_ack.timeout))
+ timeout = icsk->icsk_ack.timeout;
+ }
+ icsk->icsk_ack.pending |= ICSK_ACK_SCHED | ICSK_ACK_TIMER;
+ icsk->icsk_ack.timeout = timeout;
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, timeout);
+}
+
+void dccp_send_sync(struct sock *sk, const u64 seq,
+ const enum dccp_pkt_type pkt_type)
+{
+ /*
+ * We are not putting this on the write queue, so
+ * dccp_transmit_skb() will set the ownership to this
+ * sock.
+ */
+ struct sk_buff *skb = alloc_skb(MAX_DCCP_HEADER, GFP_ATOMIC);
+
+ if (skb == NULL)
+ /* FIXME: how to make sure the sync is sent? */
+ return;
+
+ /* Reserve space for headers and prepare control bits. */
+ skb_reserve(skb, MAX_DCCP_HEADER);
+ skb->csum = 0;
+ DCCP_SKB_CB(skb)->dccpd_type = pkt_type;
+ DCCP_SKB_CB(skb)->dccpd_seq = seq;
+
+ skb_set_owner_w(skb, sk);
+ dccp_transmit_skb(sk, skb);
+}
+
+/*
+ * Send a DCCP_PKT_CLOSE/CLOSEREQ. The caller locks the socket for us. This
+ * cannot be allowed to fail queueing a DCCP_PKT_CLOSE/CLOSEREQ frame under
+ * any circumstances.
+ */
+void dccp_send_close(struct sock *sk, const int active)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct sk_buff *skb;
+ const unsigned int prio = active ? GFP_KERNEL : GFP_ATOMIC;
+
+ skb = alloc_skb(sk->sk_prot->max_header, prio);
+ if (skb == NULL)
+ return;
+
+ /* Reserve space for headers and prepare control bits. */
+ skb_reserve(skb, sk->sk_prot->max_header);
+ skb->csum = 0;
+ DCCP_SKB_CB(skb)->dccpd_type = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ DCCP_PKT_CLOSE : DCCP_PKT_CLOSEREQ;
+
+ skb_set_owner_w(skb, sk);
+ if (active) {
+ BUG_TRAP(sk->sk_send_head == NULL);
+ sk->sk_send_head = skb;
+ dccp_transmit_skb(sk, skb_clone(skb, prio));
+ } else
+ dccp_transmit_skb(sk, skb);
+
+ ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
+ ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
+}
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
new file mode 100644
index 000000000000..18a0e69c9dc7
--- /dev/null
+++ b/net/dccp/proto.c
@@ -0,0 +1,826 @@
+/*
+ * net/dccp/proto.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/in.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/random.h>
+#include <net/checksum.h>
+
+#include <net/inet_common.h>
+#include <net/ip.h>
+#include <net/protocol.h>
+#include <net/sock.h>
+#include <net/xfrm.h>
+
+#include <asm/semaphore.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/poll.h>
+#include <linux/dccp.h>
+
+#include "ccid.h"
+#include "dccp.h"
+
+DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly;
+
+atomic_t dccp_orphan_count = ATOMIC_INIT(0);
+
+static struct net_protocol dccp_protocol = {
+ .handler = dccp_v4_rcv,
+ .err_handler = dccp_v4_err,
+};
+
+const char *dccp_packet_name(const int type)
+{
+ static const char *dccp_packet_names[] = {
+ [DCCP_PKT_REQUEST] = "REQUEST",
+ [DCCP_PKT_RESPONSE] = "RESPONSE",
+ [DCCP_PKT_DATA] = "DATA",
+ [DCCP_PKT_ACK] = "ACK",
+ [DCCP_PKT_DATAACK] = "DATAACK",
+ [DCCP_PKT_CLOSEREQ] = "CLOSEREQ",
+ [DCCP_PKT_CLOSE] = "CLOSE",
+ [DCCP_PKT_RESET] = "RESET",
+ [DCCP_PKT_SYNC] = "SYNC",
+ [DCCP_PKT_SYNCACK] = "SYNCACK",
+ };
+
+ if (type >= DCCP_NR_PKT_TYPES)
+ return "INVALID";
+ else
+ return dccp_packet_names[type];
+}
+
+EXPORT_SYMBOL_GPL(dccp_packet_name);
+
+const char *dccp_state_name(const int state)
+{
+ static char *dccp_state_names[] = {
+ [DCCP_OPEN] = "OPEN",
+ [DCCP_REQUESTING] = "REQUESTING",
+ [DCCP_PARTOPEN] = "PARTOPEN",
+ [DCCP_LISTEN] = "LISTEN",
+ [DCCP_RESPOND] = "RESPOND",
+ [DCCP_CLOSING] = "CLOSING",
+ [DCCP_TIME_WAIT] = "TIME_WAIT",
+ [DCCP_CLOSED] = "CLOSED",
+ };
+
+ if (state >= DCCP_MAX_STATES)
+ return "INVALID STATE!";
+ else
+ return dccp_state_names[state];
+}
+
+EXPORT_SYMBOL_GPL(dccp_state_name);
+
+static inline int dccp_listen_start(struct sock *sk)
+{
+ dccp_sk(sk)->dccps_role = DCCP_ROLE_LISTEN;
+ return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE);
+}
+
+int dccp_disconnect(struct sock *sk, int flags)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+ int err = 0;
+ const int old_state = sk->sk_state;
+
+ if (old_state != DCCP_CLOSED)
+ dccp_set_state(sk, DCCP_CLOSED);
+
+ /* ABORT function of RFC793 */
+ if (old_state == DCCP_LISTEN) {
+ inet_csk_listen_stop(sk);
+ /* FIXME: do the active reset thing */
+ } else if (old_state == DCCP_REQUESTING)
+ sk->sk_err = ECONNRESET;
+
+ dccp_clear_xmit_timers(sk);
+ __skb_queue_purge(&sk->sk_receive_queue);
+ if (sk->sk_send_head != NULL) {
+ __kfree_skb(sk->sk_send_head);
+ sk->sk_send_head = NULL;
+ }
+
+ inet->dport = 0;
+
+ if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK))
+ inet_reset_saddr(sk);
+
+ sk->sk_shutdown = 0;
+ sock_reset_flag(sk, SOCK_DONE);
+
+ icsk->icsk_backoff = 0;
+ inet_csk_delack_init(sk);
+ __sk_dst_reset(sk);
+
+ BUG_TRAP(!inet->num || icsk->icsk_bind_hash);
+
+ sk->sk_error_report(sk);
+ return err;
+}
+
+/*
+ * Wait for a DCCP event.
+ *
+ * Note that we don't need to lock the socket, as the upper poll layers
+ * take care of normal races (between the test and the event) and we don't
+ * go look at any of the socket buffers directly.
+ */
+static unsigned int dccp_poll(struct file *file, struct socket *sock,
+ poll_table *wait)
+{
+ unsigned int mask;
+ struct sock *sk = sock->sk;
+
+ poll_wait(file, sk->sk_sleep, wait);
+ if (sk->sk_state == DCCP_LISTEN)
+ return inet_csk_listen_poll(sk);
+
+ /* Socket is not locked. We are protected from async events
+ by poll logic and correct handling of state changes
+ made by another threads is impossible in any case.
+ */
+
+ mask = 0;
+ if (sk->sk_err)
+ mask = POLLERR;
+
+ if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED)
+ mask |= POLLHUP;
+ if (sk->sk_shutdown & RCV_SHUTDOWN)
+ mask |= POLLIN | POLLRDNORM;
+
+ /* Connected? */
+ if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) {
+ if (atomic_read(&sk->sk_rmem_alloc) > 0)
+ mask |= POLLIN | POLLRDNORM;
+
+ if (!(sk->sk_shutdown & SEND_SHUTDOWN)) {
+ if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
+ mask |= POLLOUT | POLLWRNORM;
+ } else { /* send SIGIO later */
+ set_bit(SOCK_ASYNC_NOSPACE,
+ &sk->sk_socket->flags);
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+
+ /* Race breaker. If space is freed after
+ * wspace test but before the flags are set,
+ * IO signal will be lost.
+ */
+ if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk))
+ mask |= POLLOUT | POLLWRNORM;
+ }
+ }
+ }
+ return mask;
+}
+
+int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
+{
+ dccp_pr_debug("entry\n");
+ return -ENOIOCTLCMD;
+}
+
+int dccp_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct dccp_sock *dp;
+ int err;
+ int val;
+
+ if (level != SOL_DCCP)
+ return ip_setsockopt(sk, level, optname, optval, optlen);
+
+ if (optlen < sizeof(int))
+ return -EINVAL;
+
+ if (get_user(val, (int __user *)optval))
+ return -EFAULT;
+
+ lock_sock(sk);
+
+ dp = dccp_sk(sk);
+ err = 0;
+
+ switch (optname) {
+ case DCCP_SOCKOPT_PACKET_SIZE:
+ dp->dccps_packet_size = val;
+ break;
+ default:
+ err = -ENOPROTOOPT;
+ break;
+ }
+
+ release_sock(sk);
+ return err;
+}
+
+int dccp_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct dccp_sock *dp;
+ int val, len;
+
+ if (level != SOL_DCCP)
+ return ip_getsockopt(sk, level, optname, optval, optlen);
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+
+ len = min_t(unsigned int, len, sizeof(int));
+ if (len < 0)
+ return -EINVAL;
+
+ dp = dccp_sk(sk);
+
+ switch (optname) {
+ case DCCP_SOCKOPT_PACKET_SIZE:
+ val = dp->dccps_packet_size;
+ break;
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ if (put_user(len, optlen) || copy_to_user(optval, &val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
+int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+ size_t len)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ const int flags = msg->msg_flags;
+ const int noblock = flags & MSG_DONTWAIT;
+ struct sk_buff *skb;
+ int rc, size;
+ long timeo;
+
+ if (len > dp->dccps_mss_cache)
+ return -EMSGSIZE;
+
+ lock_sock(sk);
+ timeo = sock_sndtimeo(sk, noblock);
+
+ /*
+ * We have to use sk_stream_wait_connect here to set sk_write_pending,
+ * so that the trick in dccp_rcv_request_sent_state_process.
+ */
+ /* Wait for a connection to finish. */
+ if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN | DCCPF_CLOSING))
+ if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0)
+ goto out_release;
+
+ size = sk->sk_prot->max_header + len;
+ release_sock(sk);
+ skb = sock_alloc_send_skb(sk, size, noblock, &rc);
+ lock_sock(sk);
+ if (skb == NULL)
+ goto out_release;
+
+ skb_reserve(skb, sk->sk_prot->max_header);
+ rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+ if (rc != 0)
+ goto out_discard;
+
+ rc = dccp_write_xmit(sk, skb, &timeo);
+ /*
+ * XXX we don't use sk_write_queue, so just discard the packet.
+ * Current plan however is to _use_ sk_write_queue with
+ * an algorith similar to tcp_sendmsg, where the main difference
+ * is that in DCCP we have to respect packet boundaries, so
+ * no coalescing of skbs.
+ *
+ * This bug was _quickly_ found & fixed by just looking at an OSTRA
+ * generated callgraph 8) -acme
+ */
+ if (rc != 0)
+ goto out_discard;
+out_release:
+ release_sock(sk);
+ return rc ? : len;
+out_discard:
+ kfree_skb(skb);
+ goto out_release;
+}
+
+int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
+ size_t len, int nonblock, int flags, int *addr_len)
+{
+ const struct dccp_hdr *dh;
+ long timeo;
+
+ lock_sock(sk);
+
+ if (sk->sk_state == DCCP_LISTEN) {
+ len = -ENOTCONN;
+ goto out;
+ }
+
+ timeo = sock_rcvtimeo(sk, nonblock);
+
+ do {
+ struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
+
+ if (skb == NULL)
+ goto verify_sock_status;
+
+ dh = dccp_hdr(skb);
+
+ if (dh->dccph_type == DCCP_PKT_DATA ||
+ dh->dccph_type == DCCP_PKT_DATAACK)
+ goto found_ok_skb;
+
+ if (dh->dccph_type == DCCP_PKT_RESET ||
+ dh->dccph_type == DCCP_PKT_CLOSE) {
+ dccp_pr_debug("found fin ok!\n");
+ len = 0;
+ goto found_fin_ok;
+ }
+ dccp_pr_debug("packet_type=%s\n",
+ dccp_packet_name(dh->dccph_type));
+ sk_eat_skb(sk, skb);
+verify_sock_status:
+ if (sock_flag(sk, SOCK_DONE)) {
+ len = 0;
+ break;
+ }
+
+ if (sk->sk_err) {
+ len = sock_error(sk);
+ break;
+ }
+
+ if (sk->sk_shutdown & RCV_SHUTDOWN) {
+ len = 0;
+ break;
+ }
+
+ if (sk->sk_state == DCCP_CLOSED) {
+ if (!sock_flag(sk, SOCK_DONE)) {
+ /* This occurs when user tries to read
+ * from never connected socket.
+ */
+ len = -ENOTCONN;
+ break;
+ }
+ len = 0;
+ break;
+ }
+
+ if (!timeo) {
+ len = -EAGAIN;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ len = sock_intr_errno(timeo);
+ break;
+ }
+
+ sk_wait_data(sk, &timeo);
+ continue;
+ found_ok_skb:
+ if (len > skb->len)
+ len = skb->len;
+ else if (len < skb->len)
+ msg->msg_flags |= MSG_TRUNC;
+
+ if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) {
+ /* Exception. Bailout! */
+ len = -EFAULT;
+ break;
+ }
+ found_fin_ok:
+ if (!(flags & MSG_PEEK))
+ sk_eat_skb(sk, skb);
+ break;
+ } while (1);
+out:
+ release_sock(sk);
+ return len;
+}
+
+static int inet_dccp_listen(struct socket *sock, int backlog)
+{
+ struct sock *sk = sock->sk;
+ unsigned char old_state;
+ int err;
+
+ lock_sock(sk);
+
+ err = -EINVAL;
+ if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP)
+ goto out;
+
+ old_state = sk->sk_state;
+ if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN)))
+ goto out;
+
+ /* Really, if the socket is already in listen state
+ * we can only allow the backlog to be adjusted.
+ */
+ if (old_state != DCCP_LISTEN) {
+ /*
+ * FIXME: here it probably should be sk->sk_prot->listen_start
+ * see tcp_listen_start
+ */
+ err = dccp_listen_start(sk);
+ if (err)
+ goto out;
+ }
+ sk->sk_max_ack_backlog = backlog;
+ err = 0;
+
+out:
+ release_sock(sk);
+ return err;
+}
+
+static const unsigned char dccp_new_state[] = {
+ /* current state: new state: action: */
+ [0] = DCCP_CLOSED,
+ [DCCP_OPEN] = DCCP_CLOSING | DCCP_ACTION_FIN,
+ [DCCP_REQUESTING] = DCCP_CLOSED,
+ [DCCP_PARTOPEN] = DCCP_CLOSING | DCCP_ACTION_FIN,
+ [DCCP_LISTEN] = DCCP_CLOSED,
+ [DCCP_RESPOND] = DCCP_CLOSED,
+ [DCCP_CLOSING] = DCCP_CLOSED,
+ [DCCP_TIME_WAIT] = DCCP_CLOSED,
+ [DCCP_CLOSED] = DCCP_CLOSED,
+};
+
+static int dccp_close_state(struct sock *sk)
+{
+ const int next = dccp_new_state[sk->sk_state];
+ const int ns = next & DCCP_STATE_MASK;
+
+ if (ns != sk->sk_state)
+ dccp_set_state(sk, ns);
+
+ return next & DCCP_ACTION_FIN;
+}
+
+void dccp_close(struct sock *sk, long timeout)
+{
+ struct sk_buff *skb;
+
+ lock_sock(sk);
+
+ sk->sk_shutdown = SHUTDOWN_MASK;
+
+ if (sk->sk_state == DCCP_LISTEN) {
+ dccp_set_state(sk, DCCP_CLOSED);
+
+ /* Special case. */
+ inet_csk_listen_stop(sk);
+
+ goto adjudge_to_death;
+ }
+
+ /*
+ * We need to flush the recv. buffs. We do this only on the
+ * descriptor close, not protocol-sourced closes, because the
+ *reader process may not have drained the data yet!
+ */
+ /* FIXME: check for unread data */
+ while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ __kfree_skb(skb);
+ }
+
+ if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
+ /* Check zero linger _after_ checking for unread data. */
+ sk->sk_prot->disconnect(sk, 0);
+ } else if (dccp_close_state(sk)) {
+ dccp_send_close(sk, 1);
+ }
+
+ sk_stream_wait_close(sk, timeout);
+
+adjudge_to_death:
+ /*
+ * It is the last release_sock in its life. It will remove backlog.
+ */
+ release_sock(sk);
+ /*
+ * Now socket is owned by kernel and we acquire BH lock
+ * to finish close. No need to check for user refs.
+ */
+ local_bh_disable();
+ bh_lock_sock(sk);
+ BUG_TRAP(!sock_owned_by_user(sk));
+
+ sock_hold(sk);
+ sock_orphan(sk);
+
+ /*
+ * The last release_sock may have processed the CLOSE or RESET
+ * packet moving sock to CLOSED state, if not we have to fire
+ * the CLOSE/CLOSEREQ retransmission timer, see "8.3. Termination"
+ * in draft-ietf-dccp-spec-11. -acme
+ */
+ if (sk->sk_state == DCCP_CLOSING) {
+ /* FIXME: should start at 2 * RTT */
+ /* Timer for repeating the CLOSE/CLOSEREQ until an answer. */
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ inet_csk(sk)->icsk_rto,
+ DCCP_RTO_MAX);
+#if 0
+ /* Yeah, we should use sk->sk_prot->orphan_count, etc */
+ dccp_set_state(sk, DCCP_CLOSED);
+#endif
+ }
+
+ atomic_inc(sk->sk_prot->orphan_count);
+ if (sk->sk_state == DCCP_CLOSED)
+ inet_csk_destroy_sock(sk);
+
+ /* Otherwise, socket is reprieved until protocol close. */
+
+ bh_unlock_sock(sk);
+ local_bh_enable();
+ sock_put(sk);
+}
+
+void dccp_shutdown(struct sock *sk, int how)
+{
+ dccp_pr_debug("entry\n");
+}
+
+static struct proto_ops inet_dccp_ops = {
+ .family = PF_INET,
+ .owner = THIS_MODULE,
+ .release = inet_release,
+ .bind = inet_bind,
+ .connect = inet_stream_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = inet_accept,
+ .getname = inet_getname,
+ /* FIXME: work on tcp_poll to rename it to inet_csk_poll */
+ .poll = dccp_poll,
+ .ioctl = inet_ioctl,
+ /* FIXME: work on inet_listen to rename it to sock_common_listen */
+ .listen = inet_dccp_listen,
+ .shutdown = inet_shutdown,
+ .setsockopt = sock_common_setsockopt,
+ .getsockopt = sock_common_getsockopt,
+ .sendmsg = inet_sendmsg,
+ .recvmsg = sock_common_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+extern struct net_proto_family inet_family_ops;
+
+static struct inet_protosw dccp_v4_protosw = {
+ .type = SOCK_DCCP,
+ .protocol = IPPROTO_DCCP,
+ .prot = &dccp_v4_prot,
+ .ops = &inet_dccp_ops,
+ .capability = -1,
+ .no_check = 0,
+ .flags = 0,
+};
+
+/*
+ * This is the global socket data structure used for responding to
+ * the Out-of-the-blue (OOTB) packets. A control sock will be created
+ * for this socket at the initialization time.
+ */
+struct socket *dccp_ctl_socket;
+
+static char dccp_ctl_socket_err_msg[] __initdata =
+ KERN_ERR "DCCP: Failed to create the control socket.\n";
+
+static int __init dccp_ctl_sock_init(void)
+{
+ int rc = sock_create_kern(PF_INET, SOCK_DCCP, IPPROTO_DCCP,
+ &dccp_ctl_socket);
+ if (rc < 0)
+ printk(dccp_ctl_socket_err_msg);
+ else {
+ dccp_ctl_socket->sk->sk_allocation = GFP_ATOMIC;
+ inet_sk(dccp_ctl_socket->sk)->uc_ttl = -1;
+
+ /* Unhash it so that IP input processing does not even
+ * see it, we do not wish this socket to see incoming
+ * packets.
+ */
+ dccp_ctl_socket->sk->sk_prot->unhash(dccp_ctl_socket->sk);
+ }
+
+ return rc;
+}
+
+#ifdef CONFIG_IP_DCCP_UNLOAD_HACK
+void dccp_ctl_sock_exit(void)
+{
+ if (dccp_ctl_socket != NULL) {
+ sock_release(dccp_ctl_socket);
+ dccp_ctl_socket = NULL;
+ }
+}
+
+EXPORT_SYMBOL_GPL(dccp_ctl_sock_exit);
+#endif
+
+static int __init init_dccp_v4_mibs(void)
+{
+ int rc = -ENOMEM;
+
+ dccp_statistics[0] = alloc_percpu(struct dccp_mib);
+ if (dccp_statistics[0] == NULL)
+ goto out;
+
+ dccp_statistics[1] = alloc_percpu(struct dccp_mib);
+ if (dccp_statistics[1] == NULL)
+ goto out_free_one;
+
+ rc = 0;
+out:
+ return rc;
+out_free_one:
+ free_percpu(dccp_statistics[0]);
+ dccp_statistics[0] = NULL;
+ goto out;
+
+}
+
+static int thash_entries;
+module_param(thash_entries, int, 0444);
+MODULE_PARM_DESC(thash_entries, "Number of ehash buckets");
+
+#ifdef CONFIG_IP_DCCP_DEBUG
+int dccp_debug;
+module_param(dccp_debug, int, 0444);
+MODULE_PARM_DESC(dccp_debug, "Enable debug messages");
+#endif
+
+static int __init dccp_init(void)
+{
+ unsigned long goal;
+ int ehash_order, bhash_order, i;
+ int rc = proto_register(&dccp_v4_prot, 1);
+
+ if (rc)
+ goto out;
+
+ dccp_hashinfo.bind_bucket_cachep =
+ kmem_cache_create("dccp_bind_bucket",
+ sizeof(struct inet_bind_bucket), 0,
+ SLAB_HWCACHE_ALIGN, NULL, NULL);
+ if (!dccp_hashinfo.bind_bucket_cachep)
+ goto out_proto_unregister;
+
+ /*
+ * Size and allocate the main established and bind bucket
+ * hash tables.
+ *
+ * The methodology is similar to that of the buffer cache.
+ */
+ if (num_physpages >= (128 * 1024))
+ goal = num_physpages >> (21 - PAGE_SHIFT);
+ else
+ goal = num_physpages >> (23 - PAGE_SHIFT);
+
+ if (thash_entries)
+ goal = (thash_entries *
+ sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT;
+ for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++)
+ ;
+ do {
+ dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE /
+ sizeof(struct inet_ehash_bucket);
+ dccp_hashinfo.ehash_size >>= 1;
+ while (dccp_hashinfo.ehash_size &
+ (dccp_hashinfo.ehash_size - 1))
+ dccp_hashinfo.ehash_size--;
+ dccp_hashinfo.ehash = (struct inet_ehash_bucket *)
+ __get_free_pages(GFP_ATOMIC, ehash_order);
+ } while (!dccp_hashinfo.ehash && --ehash_order > 0);
+
+ if (!dccp_hashinfo.ehash) {
+ printk(KERN_CRIT "Failed to allocate DCCP "
+ "established hash table\n");
+ goto out_free_bind_bucket_cachep;
+ }
+
+ for (i = 0; i < (dccp_hashinfo.ehash_size << 1); i++) {
+ rwlock_init(&dccp_hashinfo.ehash[i].lock);
+ INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain);
+ }
+
+ bhash_order = ehash_order;
+
+ do {
+ dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE /
+ sizeof(struct inet_bind_hashbucket);
+ if ((dccp_hashinfo.bhash_size > (64 * 1024)) &&
+ bhash_order > 0)
+ continue;
+ dccp_hashinfo.bhash = (struct inet_bind_hashbucket *)
+ __get_free_pages(GFP_ATOMIC, bhash_order);
+ } while (!dccp_hashinfo.bhash && --bhash_order >= 0);
+
+ if (!dccp_hashinfo.bhash) {
+ printk(KERN_CRIT "Failed to allocate DCCP bind hash table\n");
+ goto out_free_dccp_ehash;
+ }
+
+ for (i = 0; i < dccp_hashinfo.bhash_size; i++) {
+ spin_lock_init(&dccp_hashinfo.bhash[i].lock);
+ INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain);
+ }
+
+ if (init_dccp_v4_mibs())
+ goto out_free_dccp_bhash;
+
+ rc = -EAGAIN;
+ if (inet_add_protocol(&dccp_protocol, IPPROTO_DCCP))
+ goto out_free_dccp_v4_mibs;
+
+ inet_register_protosw(&dccp_v4_protosw);
+
+ rc = dccp_ctl_sock_init();
+ if (rc)
+ goto out_unregister_protosw;
+out:
+ return rc;
+out_unregister_protosw:
+ inet_unregister_protosw(&dccp_v4_protosw);
+ inet_del_protocol(&dccp_protocol, IPPROTO_DCCP);
+out_free_dccp_v4_mibs:
+ free_percpu(dccp_statistics[0]);
+ free_percpu(dccp_statistics[1]);
+ dccp_statistics[0] = dccp_statistics[1] = NULL;
+out_free_dccp_bhash:
+ free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order);
+ dccp_hashinfo.bhash = NULL;
+out_free_dccp_ehash:
+ free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order);
+ dccp_hashinfo.ehash = NULL;
+out_free_bind_bucket_cachep:
+ kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
+ dccp_hashinfo.bind_bucket_cachep = NULL;
+out_proto_unregister:
+ proto_unregister(&dccp_v4_prot);
+ goto out;
+}
+
+static const char dccp_del_proto_err_msg[] __exitdata =
+ KERN_ERR "can't remove dccp net_protocol\n";
+
+static void __exit dccp_fini(void)
+{
+ inet_unregister_protosw(&dccp_v4_protosw);
+
+ if (inet_del_protocol(&dccp_protocol, IPPROTO_DCCP) < 0)
+ printk(dccp_del_proto_err_msg);
+
+ free_percpu(dccp_statistics[0]);
+ free_percpu(dccp_statistics[1]);
+ free_pages((unsigned long)dccp_hashinfo.bhash,
+ get_order(dccp_hashinfo.bhash_size *
+ sizeof(struct inet_bind_hashbucket)));
+ free_pages((unsigned long)dccp_hashinfo.ehash,
+ get_order(dccp_hashinfo.ehash_size *
+ sizeof(struct inet_ehash_bucket)));
+ kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
+ proto_unregister(&dccp_v4_prot);
+}
+
+module_init(dccp_init);
+module_exit(dccp_fini);
+
+/*
+ * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33)
+ * values directly, Also cover the case where the protocol is not specified,
+ * i.e. net-pf-PF_INET-proto-0-type-SOCK_DCCP
+ */
+MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-33-type-6");
+MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-0-type-6");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>");
+MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol");
diff --git a/net/dccp/timer.c b/net/dccp/timer.c
new file mode 100644
index 000000000000..aa34b576e228
--- /dev/null
+++ b/net/dccp/timer.c
@@ -0,0 +1,255 @@
+/*
+ * net/dccp/timer.c
+ *
+ * An implementation of the DCCP protocol
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/skbuff.h>
+
+#include "dccp.h"
+
+static void dccp_write_timer(unsigned long data);
+static void dccp_keepalive_timer(unsigned long data);
+static void dccp_delack_timer(unsigned long data);
+
+void dccp_init_xmit_timers(struct sock *sk)
+{
+ inet_csk_init_xmit_timers(sk, &dccp_write_timer, &dccp_delack_timer,
+ &dccp_keepalive_timer);
+}
+
+static void dccp_write_err(struct sock *sk)
+{
+ sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT;
+ sk->sk_error_report(sk);
+
+ dccp_v4_send_reset(sk, DCCP_RESET_CODE_ABORTED);
+ dccp_done(sk);
+ DCCP_INC_STATS_BH(DCCP_MIB_ABORTONTIMEOUT);
+}
+
+/* A write timeout has occurred. Process the after effects. */
+static int dccp_write_timeout(struct sock *sk)
+{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ int retry_until;
+
+ if (sk->sk_state == DCCP_REQUESTING || sk->sk_state == DCCP_PARTOPEN) {
+ if (icsk->icsk_retransmits != 0)
+ dst_negative_advice(&sk->sk_dst_cache);
+ retry_until = icsk->icsk_syn_retries ? :
+ /* FIXME! */ 3 /* FIXME! sysctl_tcp_syn_retries */;
+ } else {
+ if (icsk->icsk_retransmits >=
+ /* FIXME! sysctl_tcp_retries1 */ 5 /* FIXME! */) {
+ /* NOTE. draft-ietf-tcpimpl-pmtud-01.txt requires pmtu
+ black hole detection. :-(
+
+ It is place to make it. It is not made. I do not want
+ to make it. It is disguisting. It does not work in any
+ case. Let me to cite the same draft, which requires for
+ us to implement this:
+
+ "The one security concern raised by this memo is that ICMP black holes
+ are often caused by over-zealous security administrators who block
+ all ICMP messages. It is vitally important that those who design and
+ deploy security systems understand the impact of strict filtering on
+ upper-layer protocols. The safest web site in the world is worthless
+ if most TCP implementations cannot transfer data from it. It would
+ be far nicer to have all of the black holes fixed rather than fixing
+ all of the TCP implementations."
+
+ Golden words :-).
+ */
+
+ dst_negative_advice(&sk->sk_dst_cache);
+ }
+
+ retry_until = /* FIXME! */ 15 /* FIXME! sysctl_tcp_retries2 */;
+ /*
+ * FIXME: see tcp_write_timout and tcp_out_of_resources
+ */
+ }
+
+ if (icsk->icsk_retransmits >= retry_until) {
+ /* Has it gone just too far? */
+ dccp_write_err(sk);
+ return 1;
+ }
+ return 0;
+}
+
+/* This is the same as tcp_delack_timer, sans prequeue & mem_reclaim stuff */
+static void dccp_delack_timer(unsigned long data)
+{
+ struct sock *sk = (struct sock *)data;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ bh_lock_sock(sk);
+ if (sock_owned_by_user(sk)) {
+ /* Try again later. */
+ icsk->icsk_ack.blocked = 1;
+ NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKLOCKED);
+ sk_reset_timer(sk, &icsk->icsk_delack_timer,
+ jiffies + TCP_DELACK_MIN);
+ goto out;
+ }
+
+ if (sk->sk_state == DCCP_CLOSED ||
+ !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))
+ goto out;
+ if (time_after(icsk->icsk_ack.timeout, jiffies)) {
+ sk_reset_timer(sk, &icsk->icsk_delack_timer,
+ icsk->icsk_ack.timeout);
+ goto out;
+ }
+
+ icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER;
+
+ if (inet_csk_ack_scheduled(sk)) {
+ if (!icsk->icsk_ack.pingpong) {
+ /* Delayed ACK missed: inflate ATO. */
+ icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1,
+ icsk->icsk_rto);
+ } else {
+ /* Delayed ACK missed: leave pingpong mode and
+ * deflate ATO.
+ */
+ icsk->icsk_ack.pingpong = 0;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
+ }
+ dccp_send_ack(sk);
+ NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKS);
+ }
+out:
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
+
+/*
+ * The DCCP retransmit timer.
+ */
+static void dccp_retransmit_timer(struct sock *sk)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ /*
+ * sk->sk_send_head has to have one skb with
+ * DCCP_SKB_CB(skb)->dccpd_type set to one of the retransmittable DCCP
+ * packet types (REQUEST, RESPONSE, the ACK in the 3way handshake
+ * (PARTOPEN timer), etc).
+ */
+ BUG_TRAP(sk->sk_send_head != NULL);
+
+ /*
+ * More than than 4MSL (8 minutes) has passed, a RESET(aborted) was
+ * sent, no need to retransmit, this sock is dead.
+ */
+ if (dccp_write_timeout(sk))
+ goto out;
+
+ /*
+ * We want to know the number of packets retransmitted, not the
+ * total number of retransmissions of clones of original packets.
+ */
+ if (icsk->icsk_retransmits == 0)
+ DCCP_INC_STATS_BH(DCCP_MIB_TIMEOUTS);
+
+ if (dccp_retransmit_skb(sk, sk->sk_send_head) < 0) {
+ /*
+ * Retransmission failed because of local congestion,
+ * do not backoff.
+ */
+ if (icsk->icsk_retransmits == 0)
+ icsk->icsk_retransmits = 1;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ min(icsk->icsk_rto,
+ TCP_RESOURCE_PROBE_INTERVAL),
+ DCCP_RTO_MAX);
+ goto out;
+ }
+
+ icsk->icsk_backoff++;
+ icsk->icsk_retransmits++;
+
+ icsk->icsk_rto = min(icsk->icsk_rto << 1, DCCP_RTO_MAX);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, icsk->icsk_rto,
+ DCCP_RTO_MAX);
+ if (icsk->icsk_retransmits > 3 /* FIXME: sysctl_dccp_retries1 */)
+ __sk_dst_reset(sk);
+out:;
+}
+
+static void dccp_write_timer(unsigned long data)
+{
+ struct sock *sk = (struct sock *)data;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ int event = 0;
+
+ bh_lock_sock(sk);
+ if (sock_owned_by_user(sk)) {
+ /* Try again later */
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer,
+ jiffies + (HZ / 20));
+ goto out;
+ }
+
+ if (sk->sk_state == DCCP_CLOSED || !icsk->icsk_pending)
+ goto out;
+
+ if (time_after(icsk->icsk_timeout, jiffies)) {
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer,
+ icsk->icsk_timeout);
+ goto out;
+ }
+
+ event = icsk->icsk_pending;
+ icsk->icsk_pending = 0;
+
+ switch (event) {
+ case ICSK_TIME_RETRANS:
+ dccp_retransmit_timer(sk);
+ break;
+ }
+out:
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
+
+/*
+ * Timer for listening sockets
+ */
+static void dccp_response_timer(struct sock *sk)
+{
+ inet_csk_reqsk_queue_prune(sk, TCP_SYNQ_INTERVAL, DCCP_TIMEOUT_INIT,
+ DCCP_RTO_MAX);
+}
+
+static void dccp_keepalive_timer(unsigned long data)
+{
+ struct sock *sk = (struct sock *)data;
+
+ /* Only process if socket is not in use. */
+ bh_lock_sock(sk);
+ if (sock_owned_by_user(sk)) {
+ /* Try again later. */
+ inet_csk_reset_keepalive_timer(sk, HZ / 20);
+ goto out;
+ }
+
+ if (sk->sk_state == DCCP_LISTEN) {
+ dccp_response_timer(sk);
+ goto out;
+ }
+out:
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index acdd18e6adb2..621680f127af 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -118,7 +118,7 @@ Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat
#include <linux/netfilter.h>
#include <linux/seq_file.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/flow.h>
#include <asm/system.h>
#include <asm/ioctls.h>
@@ -1763,7 +1763,7 @@ static int dn_recvmsg(struct kiocb *iocb, struct socket *sock,
nskb = skb->next;
if (skb->len == 0) {
- skb_unlink(skb);
+ skb_unlink(skb, queue);
kfree_skb(skb);
/*
* N.B. Don't refer to skb or cb after this point
@@ -2064,7 +2064,7 @@ static struct notifier_block dn_dev_notifier = {
.notifier_call = dn_device_event,
};
-extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *);
+extern int dn_route_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
static struct packet_type dn_dix_packet_type = {
.type = __constant_htons(ETH_P_DNA_RT),
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index 00233ecbc9cb..5610bb16dbf9 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -752,16 +752,16 @@ static void rtmsg_ifa(int event, struct dn_ifaddr *ifa)
skb = alloc_skb(size, GFP_KERNEL);
if (!skb) {
- netlink_set_err(rtnl, 0, RTMGRP_DECnet_IFADDR, ENOBUFS);
+ netlink_set_err(rtnl, 0, RTNLGRP_DECnet_IFADDR, ENOBUFS);
return;
}
if (dn_dev_fill_ifaddr(skb, ifa, 0, 0, event, 0) < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTMGRP_DECnet_IFADDR, EINVAL);
+ netlink_set_err(rtnl, 0, RTNLGRP_DECnet_IFADDR, EINVAL);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_DECnet_IFADDR;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_DECnet_IFADDR, GFP_KERNEL);
+ NETLINK_CB(skb).dst_group = RTNLGRP_DECnet_IFADDR;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_DECnet_IFADDR, GFP_KERNEL);
}
static int dn_dev_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
diff --git a/net/decnet/dn_nsp_in.c b/net/decnet/dn_nsp_in.c
index 202dbde9850d..369f25b60f3f 100644
--- a/net/decnet/dn_nsp_in.c
+++ b/net/decnet/dn_nsp_in.c
@@ -60,7 +60,7 @@
#include <linux/inet.h>
#include <linux/route.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
diff --git a/net/decnet/dn_nsp_out.c b/net/decnet/dn_nsp_out.c
index 8cce1fdbda90..e0bebf4bbcad 100644
--- a/net/decnet/dn_nsp_out.c
+++ b/net/decnet/dn_nsp_out.c
@@ -479,7 +479,7 @@ int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff
xmit_count = cb2->xmit_count;
segnum = cb2->segnum;
/* Remove and drop ack'ed packet */
- skb_unlink(ack);
+ skb_unlink(ack, q);
kfree_skb(ack);
ack = NULL;
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 2399fa8a3f86..2c915f305be3 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -572,7 +572,7 @@ static int dn_route_ptp_hello(struct sk_buff *skb)
return NET_RX_SUCCESS;
}
-int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct dn_skb_cb *cb;
unsigned char flags = 0;
diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index 28ba5777a25a..eeba56f99323 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -79,7 +79,7 @@ for( ; ((f) = *(fp)) != NULL && dn_key_eq((f)->fn_key, (key)); (fp) = &(f)->fn_n
static DEFINE_RWLOCK(dn_fib_tables_lock);
struct dn_fib_table *dn_fib_tables[RT_TABLE_MAX + 1];
-static kmem_cache_t *dn_hash_kmem;
+static kmem_cache_t *dn_hash_kmem __read_mostly;
static int dn_fib_hash_zombies;
static inline dn_fib_idx_t dn_hash(dn_fib_key_t key, struct dn_zone *dz)
@@ -349,10 +349,10 @@ static void dn_rtmsg_fib(int event, struct dn_fib_node *f, int z, int tb_id,
kfree_skb(skb);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_DECnet_ROUTE;
+ NETLINK_CB(skb).dst_group = RTNLGRP_DECnet_ROUTE;
if (nlh->nlmsg_flags & NLM_F_ECHO)
atomic_inc(&skb->users);
- netlink_broadcast(rtnl, skb, pid, RTMGRP_DECnet_ROUTE, GFP_KERNEL);
+ netlink_broadcast(rtnl, skb, pid, RTNLGRP_DECnet_ROUTE, GFP_KERNEL);
if (nlh->nlmsg_flags & NLM_F_ECHO)
netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
}
diff --git a/net/decnet/netfilter/dn_rtmsg.c b/net/decnet/netfilter/dn_rtmsg.c
index 284a9998e53d..1ab94c6e22ed 100644
--- a/net/decnet/netfilter/dn_rtmsg.c
+++ b/net/decnet/netfilter/dn_rtmsg.c
@@ -19,6 +19,7 @@
#include <linux/netfilter.h>
#include <linux/spinlock.h>
#include <linux/netlink.h>
+#include <linux/netfilter_decnet.h>
#include <net/sock.h>
#include <net/flow.h>
@@ -71,10 +72,10 @@ static void dnrmg_send_peer(struct sk_buff *skb)
switch(flags & DN_RT_CNTL_MSK) {
case DN_RT_PKT_L1RT:
- group = DNRMG_L1_GROUP;
+ group = DNRNG_NLGRP_L1;
break;
case DN_RT_PKT_L2RT:
- group = DNRMG_L2_GROUP;
+ group = DNRNG_NLGRP_L2;
break;
default:
return;
@@ -83,7 +84,7 @@ static void dnrmg_send_peer(struct sk_buff *skb)
skb2 = dnrmg_build_message(skb, &status);
if (skb2 == NULL)
return;
- NETLINK_CB(skb2).dst_groups = group;
+ NETLINK_CB(skb2).dst_group = group;
netlink_broadcast(dnrmg, skb2, 0, group, GFP_ATOMIC);
}
@@ -138,7 +139,8 @@ static int __init init(void)
{
int rv = 0;
- dnrmg = netlink_kernel_create(NETLINK_DNRTMSG, dnrmg_receive_user_sk);
+ dnrmg = netlink_kernel_create(NETLINK_DNRTMSG, DNRNG_NLGRP_MAX,
+ dnrmg_receive_user_sk, THIS_MODULE);
if (dnrmg == NULL) {
printk(KERN_ERR "dn_rtmsg: Cannot create netlink socket");
return -ENOMEM;
@@ -162,6 +164,7 @@ static void __exit fini(void)
MODULE_DESCRIPTION("DECnet Routing Message Grabulator");
MODULE_AUTHOR("Steven Whitehouse <steve@chygwyn.com>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_DNRTMSG);
module_init(init);
module_exit(fini);
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index de691e119e17..4a62093eb343 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -159,7 +159,7 @@ static int econet_recvmsg(struct kiocb *iocb, struct socket *sock,
err = memcpy_toiovec(msg->msg_iov, skb->data, copied);
if (err)
goto out_free;
- sk->sk_stamp = skb->stamp;
+ skb_get_timestamp(skb, &sk->sk_stamp);
if (msg->msg_name)
memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
@@ -869,7 +869,7 @@ static void aun_tx_ack(unsigned long seq, int result)
foundit:
tx_result(skb->sk, eb->cookie, result);
- skb_unlink(skb);
+ skb_unlink(skb, &aun_queue);
spin_unlock_irqrestore(&aun_queue_lock, flags);
kfree_skb(skb);
}
@@ -947,7 +947,7 @@ static void ab_cleanup(unsigned long h)
{
tx_result(skb->sk, eb->cookie,
ECTYPE_TRANSMIT_NOT_PRESENT);
- skb_unlink(skb);
+ skb_unlink(skb, &aun_queue);
kfree_skb(skb);
}
skb = newskb;
@@ -1009,7 +1009,7 @@ release:
* Receive an Econet frame from a device.
*/
-static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int econet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct ec_framehdr *hdr;
struct sock *sk;
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index f6dbfb99b14d..87a052a9a84f 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -62,8 +62,6 @@
#include <asm/system.h>
#include <asm/checksum.h>
-extern int __init netdev_boot_setup(char *str);
-
__setup("ether=", netdev_boot_setup);
/*
@@ -163,7 +161,6 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
skb->mac.raw=skb->data;
skb_pull(skb,ETH_HLEN);
eth = eth_hdr(skb);
- skb->input_dev = dev;
if(*eth->h_dest&1)
{
diff --git a/net/ethernet/sysctl_net_ether.c b/net/ethernet/sysctl_net_ether.c
index b81a6d532342..66b39fc342d2 100644
--- a/net/ethernet/sysctl_net_ether.c
+++ b/net/ethernet/sysctl_net_ether.c
@@ -7,6 +7,7 @@
#include <linux/mm.h>
#include <linux/sysctl.h>
+#include <linux/if_ether.h>
ctl_table ether_table[] = {
{0}
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 0b3d9f1d8069..e55136ae09f4 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -413,20 +413,19 @@ config INET_TUNNEL
If unsure, say Y.
-config IP_TCPDIAG
- tristate "IP: TCP socket monitoring interface"
+config INET_DIAG
+ tristate "INET: socket monitoring interface"
default y
---help---
- Support for TCP socket monitoring interface used by native Linux
- tools such as ss. ss is included in iproute2, currently downloadable
- at <http://developer.osdl.org/dev/iproute2>. If you want IPv6 support
- and have selected IPv6 as a module, you need to build this as a
- module too.
+ Support for INET (TCP, DCCP, etc) socket monitoring interface used by
+ native Linux tools such as ss. ss is included in iproute2, currently
+ downloadable at <http://developer.osdl.org/dev/iproute2>.
If unsure, say Y.
-config IP_TCPDIAG_IPV6
- def_bool (IP_TCPDIAG=y && IPV6=y) || (IP_TCPDIAG=m && IPV6)
+config INET_TCP_DIAG
+ depends on INET_DIAG
+ def_tristate INET_DIAG
config TCP_CONG_ADVANCED
bool "TCP: advanced congestion control"
diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index 55dc6cca1e7b..f0435d00db6b 100644
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -4,11 +4,12 @@
obj-y := route.o inetpeer.o protocol.o \
ip_input.o ip_fragment.o ip_forward.o ip_options.o \
- ip_output.o ip_sockglue.o \
+ ip_output.o ip_sockglue.o inet_hashtables.o \
+ inet_timewait_sock.o inet_connection_sock.o \
tcp.o tcp_input.o tcp_output.o tcp_timer.o tcp_ipv4.o \
tcp_minisocks.o tcp_cong.o \
datagram.o raw.o udp.o arp.o icmp.o devinet.o af_inet.o igmp.o \
- sysctl_net_ipv4.o fib_frontend.o fib_semantics.o
+ sysctl_net_ipv4.o fib_frontend.o fib_semantics.o netfilter.o
obj-$(CONFIG_IP_FIB_HASH) += fib_hash.o
obj-$(CONFIG_IP_FIB_TRIE) += fib_trie.o
@@ -29,8 +30,9 @@ obj-$(CONFIG_IP_ROUTE_MULTIPATH_WRANDOM) += multipath_wrandom.o
obj-$(CONFIG_IP_ROUTE_MULTIPATH_DRR) += multipath_drr.o
obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_IP_VS) += ipvs/
-obj-$(CONFIG_IP_TCPDIAG) += tcp_diag.o
+obj-$(CONFIG_INET_DIAG) += inet_diag.o
obj-$(CONFIG_IP_ROUTE_MULTIPATH_CACHED) += multipath.o
+obj-$(CONFIG_INET_TCP_DIAG) += tcp_diag.o
obj-$(CONFIG_TCP_CONG_BIC) += tcp_bic.o
obj-$(CONFIG_TCP_CONG_WESTWOOD) += tcp_westwood.o
obj-$(CONFIG_TCP_CONG_HSTCP) += tcp_highspeed.o
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 163ae4068b5f..bf147f8db399 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -99,6 +99,7 @@
#include <net/arp.h>
#include <net/route.h>
#include <net/ip_fib.h>
+#include <net/inet_connection_sock.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <linux/skbuff.h>
@@ -112,11 +113,7 @@
#include <linux/mroute.h>
#endif
-DEFINE_SNMP_STAT(struct linux_mib, net_statistics);
-
-#ifdef INET_REFCNT_DEBUG
-atomic_t inet_sock_nr;
-#endif
+DEFINE_SNMP_STAT(struct linux_mib, net_statistics) __read_mostly;
extern void ip_mc_drop_socket(struct sock *sk);
@@ -153,11 +150,7 @@ void inet_sock_destruct(struct sock *sk)
if (inet->opt)
kfree(inet->opt);
dst_release(sk->sk_dst_cache);
-#ifdef INET_REFCNT_DEBUG
- atomic_dec(&inet_sock_nr);
- printk(KERN_DEBUG "INET socket %p released, %d are still alive\n",
- sk, atomic_read(&inet_sock_nr));
-#endif
+ sk_refcnt_debug_dec(sk);
}
/*
@@ -210,7 +203,7 @@ int inet_listen(struct socket *sock, int backlog)
* we can only allow the backlog to be adjusted.
*/
if (old_state != TCP_LISTEN) {
- err = tcp_listen_start(sk);
+ err = inet_csk_listen_start(sk, TCP_SYNQ_HSIZE);
if (err)
goto out;
}
@@ -235,12 +228,14 @@ static int inet_create(struct socket *sock, int protocol)
struct proto *answer_prot;
unsigned char answer_flags;
char answer_no_check;
- int err;
+ int try_loading_module = 0;
+ int err = -ESOCKTNOSUPPORT;
sock->state = SS_UNCONNECTED;
/* Look for the requested type/protocol pair. */
answer = NULL;
+lookup_protocol:
rcu_read_lock();
list_for_each_rcu(p, &inetsw[sock->type]) {
answer = list_entry(p, struct inet_protosw, list);
@@ -261,9 +256,28 @@ static int inet_create(struct socket *sock, int protocol)
answer = NULL;
}
- err = -ESOCKTNOSUPPORT;
- if (!answer)
- goto out_rcu_unlock;
+ if (unlikely(answer == NULL)) {
+ if (try_loading_module < 2) {
+ rcu_read_unlock();
+ /*
+ * Be more specific, e.g. net-pf-2-proto-132-type-1
+ * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
+ */
+ if (++try_loading_module == 1)
+ request_module("net-pf-%d-proto-%d-type-%d",
+ PF_INET, protocol, sock->type);
+ /*
+ * Fall back to generic, e.g. net-pf-2-proto-132
+ * (net-pf-PF_INET-proto-IPPROTO_SCTP)
+ */
+ else
+ request_module("net-pf-%d-proto-%d",
+ PF_INET, protocol);
+ goto lookup_protocol;
+ } else
+ goto out_rcu_unlock;
+ }
+
err = -EPERM;
if (answer->capability > 0 && !capable(answer->capability))
goto out_rcu_unlock;
@@ -317,9 +331,7 @@ static int inet_create(struct socket *sock, int protocol)
inet->mc_index = 0;
inet->mc_list = NULL;
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet_sock_nr);
-#endif
+ sk_refcnt_debug_inc(sk);
if (inet->num) {
/* It assumes that any protocol which allows
@@ -847,10 +859,6 @@ static struct net_proto_family inet_family_ops = {
.owner = THIS_MODULE,
};
-
-extern void tcp_init(void);
-extern void tcp_v4_init(struct net_proto_family *);
-
/* Upon startup we insert all the elements in inetsw_array[] into
* the linked list inetsw.
*/
@@ -961,6 +969,119 @@ void inet_unregister_protosw(struct inet_protosw *p)
}
}
+/*
+ * Shall we try to damage output packets if routing dev changes?
+ */
+
+int sysctl_ip_dynaddr;
+
+static int inet_sk_reselect_saddr(struct sock *sk)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ int err;
+ struct rtable *rt;
+ __u32 old_saddr = inet->saddr;
+ __u32 new_saddr;
+ __u32 daddr = inet->daddr;
+
+ if (inet->opt && inet->opt->srr)
+ daddr = inet->opt->faddr;
+
+ /* Query new route. */
+ err = ip_route_connect(&rt, daddr, 0,
+ RT_CONN_FLAGS(sk),
+ sk->sk_bound_dev_if,
+ sk->sk_protocol,
+ inet->sport, inet->dport, sk);
+ if (err)
+ return err;
+
+ sk_setup_caps(sk, &rt->u.dst);
+
+ new_saddr = rt->rt_src;
+
+ if (new_saddr == old_saddr)
+ return 0;
+
+ if (sysctl_ip_dynaddr > 1) {
+ printk(KERN_INFO "%s(): shifting inet->"
+ "saddr from %d.%d.%d.%d to %d.%d.%d.%d\n",
+ __FUNCTION__,
+ NIPQUAD(old_saddr),
+ NIPQUAD(new_saddr));
+ }
+
+ inet->saddr = inet->rcv_saddr = new_saddr;
+
+ /*
+ * XXX The only one ugly spot where we need to
+ * XXX really change the sockets identity after
+ * XXX it has entered the hashes. -DaveM
+ *
+ * Besides that, it does not check for connection
+ * uniqueness. Wait for troubles.
+ */
+ __sk_prot_rehash(sk);
+ return 0;
+}
+
+int inet_sk_rebuild_header(struct sock *sk)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
+ u32 daddr;
+ int err;
+
+ /* Route is OK, nothing to do. */
+ if (rt)
+ return 0;
+
+ /* Reroute. */
+ daddr = inet->daddr;
+ if (inet->opt && inet->opt->srr)
+ daddr = inet->opt->faddr;
+{
+ struct flowi fl = {
+ .oif = sk->sk_bound_dev_if,
+ .nl_u = {
+ .ip4_u = {
+ .daddr = daddr,
+ .saddr = inet->saddr,
+ .tos = RT_CONN_FLAGS(sk),
+ },
+ },
+ .proto = sk->sk_protocol,
+ .uli_u = {
+ .ports = {
+ .sport = inet->sport,
+ .dport = inet->dport,
+ },
+ },
+ };
+
+ err = ip_route_output_flow(&rt, &fl, sk, 0);
+}
+ if (!err)
+ sk_setup_caps(sk, &rt->u.dst);
+ else {
+ /* Routing failed... */
+ sk->sk_route_caps = 0;
+ /*
+ * Other protocols have to map its equivalent state to TCP_SYN_SENT.
+ * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
+ */
+ if (!sysctl_ip_dynaddr ||
+ sk->sk_state != TCP_SYN_SENT ||
+ (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
+ (err = inet_sk_reselect_saddr(sk)) != 0)
+ sk->sk_err_soft = -err;
+ }
+
+ return err;
+}
+
+EXPORT_SYMBOL(inet_sk_rebuild_header);
+
#ifdef CONFIG_IP_MULTICAST
static struct net_protocol igmp_protocol = {
.handler = igmp_rcv,
@@ -1007,7 +1128,6 @@ static int __init init_ipv4_mibs(void)
}
static int ipv4_proc_init(void);
-extern void ipfrag_init(void);
/*
* IP protocol layer initialiser
@@ -1128,19 +1248,10 @@ module_init(inet_init);
/* ------------------------------------------------------------------------ */
#ifdef CONFIG_PROC_FS
-extern int fib_proc_init(void);
-extern void fib_proc_exit(void);
#ifdef CONFIG_IP_FIB_TRIE
extern int fib_stat_proc_init(void);
extern void fib_stat_proc_exit(void);
#endif
-extern int ip_misc_proc_init(void);
-extern int raw_proc_init(void);
-extern void raw_proc_exit(void);
-extern int tcp4_proc_init(void);
-extern void tcp4_proc_exit(void);
-extern int udp4_proc_init(void);
-extern void udp4_proc_exit(void);
static int __init ipv4_proc_init(void)
{
@@ -1205,7 +1316,3 @@ EXPORT_SYMBOL(inet_stream_ops);
EXPORT_SYMBOL(inet_unregister_protosw);
EXPORT_SYMBOL(net_statistics);
EXPORT_SYMBOL(sysctl_ip_nonlocal_bind);
-
-#ifdef INET_REFCNT_DEBUG
-EXPORT_SYMBOL(inet_sock_nr);
-#endif
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index a642fd612853..8bf312bdea13 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -700,7 +700,7 @@ void arp_send(int type, int ptype, u32 dest_ip,
static void parp_redo(struct sk_buff *skb)
{
nf_reset(skb);
- arp_rcv(skb, skb->dev, NULL);
+ arp_rcv(skb, skb->dev, NULL, skb->dev);
}
/*
@@ -865,7 +865,7 @@ static int arp_process(struct sk_buff *skb)
if (n)
neigh_release(n);
- if (skb->stamp.tv_sec == LOCALLY_ENQUEUED ||
+ if (NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED ||
skb->pkt_type == PACKET_HOST ||
in_dev->arp_parms->proxy_delay == 0) {
arp_send(ARPOP_REPLY,ETH_P_ARP,sip,dev,tip,sha,dev->dev_addr,sha);
@@ -927,7 +927,7 @@ out:
* Receive an arp request from the device layer.
*/
-int arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+int arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct arphdr *arp;
@@ -948,6 +948,8 @@ int arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
goto out_of_mem;
+ memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb));
+
return NF_HOOK(NF_ARP, NF_ARP_IN, skb, dev, NULL, arp_process);
freeskb:
diff --git a/net/ipv4/datagram.c b/net/ipv4/datagram.c
index b1db561f2542..c1b42b5257f8 100644
--- a/net/ipv4/datagram.c
+++ b/net/ipv4/datagram.c
@@ -16,9 +16,10 @@
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/in.h>
+#include <net/ip.h>
#include <net/sock.h>
-#include <net/tcp.h>
#include <net/route.h>
+#include <net/tcp_states.h>
int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index d8a10e3dd77d..ba2895ae8151 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1111,13 +1111,12 @@ static void rtmsg_ifa(int event, struct in_ifaddr* ifa)
struct sk_buff *skb = alloc_skb(size, GFP_KERNEL);
if (!skb)
- netlink_set_err(rtnl, 0, RTMGRP_IPV4_IFADDR, ENOBUFS);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, ENOBUFS);
else if (inet_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTMGRP_IPV4_IFADDR, EINVAL);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, EINVAL);
} else {
- NETLINK_CB(skb).dst_groups = RTMGRP_IPV4_IFADDR;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV4_IFADDR, GFP_KERNEL);
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV4_IFADDR, GFP_KERNEL);
}
}
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index ba57446d5d1f..b31ffc5053d2 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -331,8 +331,8 @@ static void esp4_err(struct sk_buff *skb, u32 info)
x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET);
if (!x)
return;
- NETDEBUG(printk(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n",
- ntohl(esph->spi), ntohl(iph->daddr)));
+ NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n",
+ ntohl(esph->spi), ntohl(iph->daddr));
xfrm_state_put(x);
}
@@ -395,10 +395,10 @@ static int esp_init_state(struct xfrm_state *x)
if (aalg_desc->uinfo.auth.icv_fullbits/8 !=
crypto_tfm_alg_digestsize(esp->auth.tfm)) {
- NETDEBUG(printk(KERN_INFO "ESP: %s digestsize %u != %hu\n",
- x->aalg->alg_name,
- crypto_tfm_alg_digestsize(esp->auth.tfm),
- aalg_desc->uinfo.auth.icv_fullbits/8));
+ NETDEBUG(KERN_INFO "ESP: %s digestsize %u != %hu\n",
+ x->aalg->alg_name,
+ crypto_tfm_alg_digestsize(esp->auth.tfm),
+ aalg_desc->uinfo.auth.icv_fullbits/8);
goto error;
}
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index cd8e45ab9580..4e1379f71269 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -558,16 +558,15 @@ static void nl_fib_input(struct sock *sk, int len)
nl_fib_lookup(frn, tb);
pid = nlh->nlmsg_pid; /*pid of sending process */
- NETLINK_CB(skb).groups = 0; /* not in mcast group */
NETLINK_CB(skb).pid = 0; /* from kernel */
NETLINK_CB(skb).dst_pid = pid;
- NETLINK_CB(skb).dst_groups = 0; /* unicast */
+ NETLINK_CB(skb).dst_group = 0; /* unicast */
netlink_unicast(sk, skb, pid, MSG_DONTWAIT);
}
static void nl_fib_lookup_init(void)
{
- netlink_kernel_create(NETLINK_FIB_LOOKUP, nl_fib_input);
+ netlink_kernel_create(NETLINK_FIB_LOOKUP, 0, nl_fib_input, THIS_MODULE);
}
static void fib_disable_ip(struct net_device *dev, int force)
@@ -662,5 +661,4 @@ void __init ip_fib_init(void)
}
EXPORT_SYMBOL(inet_addr_type);
-EXPORT_SYMBOL(ip_dev_find);
EXPORT_SYMBOL(ip_rt_ioctl);
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c
index b10d6bb5ef3d..2a8c9afc3695 100644
--- a/net/ipv4/fib_hash.c
+++ b/net/ipv4/fib_hash.c
@@ -45,8 +45,8 @@
#include "fib_lookup.h"
-static kmem_cache_t *fn_hash_kmem;
-static kmem_cache_t *fn_alias_kmem;
+static kmem_cache_t *fn_hash_kmem __read_mostly;
+static kmem_cache_t *fn_alias_kmem __read_mostly;
struct fib_node {
struct hlist_node fn_hash;
diff --git a/net/ipv4/fib_lookup.h b/net/ipv4/fib_lookup.h
index b729d97cfa93..ef6609ea0eb7 100644
--- a/net/ipv4/fib_lookup.h
+++ b/net/ipv4/fib_lookup.h
@@ -7,6 +7,7 @@
struct fib_alias {
struct list_head fa_list;
+ struct rcu_head rcu;
struct fib_info *fa_info;
u8 fa_tos;
u8 fa_type;
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index e278cb9d0075..d41219e8037c 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -290,10 +290,10 @@ void rtmsg_fib(int event, u32 key, struct fib_alias *fa,
kfree_skb(skb);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_IPV4_ROUTE;
+ NETLINK_CB(skb).dst_group = RTNLGRP_IPV4_ROUTE;
if (n->nlmsg_flags&NLM_F_ECHO)
atomic_inc(&skb->users);
- netlink_broadcast(rtnl, skb, pid, RTMGRP_IPV4_ROUTE, GFP_KERNEL);
+ netlink_broadcast(rtnl, skb, pid, RTNLGRP_IPV4_ROUTE, GFP_KERNEL);
if (n->nlmsg_flags&NLM_F_ECHO)
netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
}
@@ -854,6 +854,7 @@ failure:
return NULL;
}
+/* Note! fib_semantic_match intentionally uses RCU list functions. */
int fib_semantic_match(struct list_head *head, const struct flowi *flp,
struct fib_result *res, __u32 zone, __u32 mask,
int prefixlen)
@@ -861,7 +862,7 @@ int fib_semantic_match(struct list_head *head, const struct flowi *flp,
struct fib_alias *fa;
int nh_sel = 0;
- list_for_each_entry(fa, head, fa_list) {
+ list_for_each_entry_rcu(fa, head, fa_list) {
int err;
if (fa->fa_tos &&
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index a701405fab0b..b2dea4e5da77 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -43,7 +43,7 @@
* 2 of the License, or (at your option) any later version.
*/
-#define VERSION "0.325"
+#define VERSION "0.402"
#include <linux/config.h>
#include <asm/uaccess.h>
@@ -62,6 +62,7 @@
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/proc_fs.h>
+#include <linux/rcupdate.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/init.h>
@@ -77,56 +78,55 @@
#undef CONFIG_IP_FIB_TRIE_STATS
#define MAX_CHILDS 16384
-#define EXTRACT(p, n, str) ((str)<<(p)>>(32-(n)))
#define KEYLENGTH (8*sizeof(t_key))
#define MASK_PFX(k, l) (((l)==0)?0:(k >> (KEYLENGTH-l)) << (KEYLENGTH-l))
#define TKEY_GET_MASK(offset, bits) (((bits)==0)?0:((t_key)(-1) << (KEYLENGTH - bits) >> offset))
-static DEFINE_RWLOCK(fib_lock);
-
typedef unsigned int t_key;
#define T_TNODE 0
#define T_LEAF 1
#define NODE_TYPE_MASK 0x1UL
-#define NODE_PARENT(_node) \
- ((struct tnode *)((_node)->_parent & ~NODE_TYPE_MASK))
-#define NODE_SET_PARENT(_node, _ptr) \
- ((_node)->_parent = (((unsigned long)(_ptr)) | \
- ((_node)->_parent & NODE_TYPE_MASK)))
-#define NODE_INIT_PARENT(_node, _type) \
- ((_node)->_parent = (_type))
-#define NODE_TYPE(_node) \
- ((_node)->_parent & NODE_TYPE_MASK)
-
-#define IS_TNODE(n) (!(n->_parent & T_LEAF))
-#define IS_LEAF(n) (n->_parent & T_LEAF)
+#define NODE_PARENT(node) \
+ ((struct tnode *)rcu_dereference(((node)->parent & ~NODE_TYPE_MASK)))
+
+#define NODE_TYPE(node) ((node)->parent & NODE_TYPE_MASK)
+
+#define NODE_SET_PARENT(node, ptr) \
+ rcu_assign_pointer((node)->parent, \
+ ((unsigned long)(ptr)) | NODE_TYPE(node))
+
+#define IS_TNODE(n) (!(n->parent & T_LEAF))
+#define IS_LEAF(n) (n->parent & T_LEAF)
struct node {
- t_key key;
- unsigned long _parent;
+ t_key key;
+ unsigned long parent;
};
struct leaf {
- t_key key;
- unsigned long _parent;
+ t_key key;
+ unsigned long parent;
struct hlist_head list;
+ struct rcu_head rcu;
};
struct leaf_info {
struct hlist_node hlist;
+ struct rcu_head rcu;
int plen;
struct list_head falh;
};
struct tnode {
- t_key key;
- unsigned long _parent;
- unsigned short pos:5; /* 2log(KEYLENGTH) bits needed */
- unsigned short bits:5; /* 2log(KEYLENGTH) bits needed */
- unsigned short full_children; /* KEYLENGTH bits needed */
- unsigned short empty_children; /* KEYLENGTH bits needed */
- struct node *child[0];
+ t_key key;
+ unsigned long parent;
+ unsigned short pos:5; /* 2log(KEYLENGTH) bits needed */
+ unsigned short bits:5; /* 2log(KEYLENGTH) bits needed */
+ unsigned short full_children; /* KEYLENGTH bits needed */
+ unsigned short empty_children; /* KEYLENGTH bits needed */
+ struct rcu_head rcu;
+ struct node *child[0];
};
#ifdef CONFIG_IP_FIB_TRIE_STATS
@@ -150,77 +150,45 @@ struct trie_stat {
};
struct trie {
- struct node *trie;
+ struct node *trie;
#ifdef CONFIG_IP_FIB_TRIE_STATS
struct trie_use_stats stats;
#endif
- int size;
+ int size;
unsigned int revision;
};
-static int trie_debug = 0;
-
-static int tnode_full(struct tnode *tn, struct node *n);
static void put_child(struct trie *t, struct tnode *tn, int i, struct node *n);
static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, int wasfull);
-static int tnode_child_length(struct tnode *tn);
static struct node *resize(struct trie *t, struct tnode *tn);
-static struct tnode *inflate(struct trie *t, struct tnode *tn, int *err);
-static struct tnode *halve(struct trie *t, struct tnode *tn, int *err);
+static struct tnode *inflate(struct trie *t, struct tnode *tn);
+static struct tnode *halve(struct trie *t, struct tnode *tn);
static void tnode_free(struct tnode *tn);
static void trie_dump_seq(struct seq_file *seq, struct trie *t);
-extern struct fib_alias *fib_find_alias(struct list_head *fah, u8 tos, u32 prio);
-extern int fib_detect_death(struct fib_info *fi, int order,
- struct fib_info **last_resort, int *last_idx, int *dflt);
-
-extern void rtmsg_fib(int event, u32 key, struct fib_alias *fa, int z, int tb_id,
- struct nlmsghdr *n, struct netlink_skb_parms *req);
-static kmem_cache_t *fn_alias_kmem;
+static kmem_cache_t *fn_alias_kmem __read_mostly;
static struct trie *trie_local = NULL, *trie_main = NULL;
-static void trie_bug(char *err)
-{
- printk("Trie Bug: %s\n", err);
- BUG();
-}
+
+/* rcu_read_lock needs to be hold by caller from readside */
static inline struct node *tnode_get_child(struct tnode *tn, int i)
{
- if (i >= 1<<tn->bits)
- trie_bug("tnode_get_child");
+ BUG_ON(i >= 1 << tn->bits);
- return tn->child[i];
+ return rcu_dereference(tn->child[i]);
}
-static inline int tnode_child_length(struct tnode *tn)
+static inline int tnode_child_length(const struct tnode *tn)
{
- return 1<<tn->bits;
+ return 1 << tn->bits;
}
-/*
- _________________________________________________________________
- | i | i | i | i | i | i | i | N | N | N | S | S | S | S | S | C |
- ----------------------------------------------------------------
- 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
-
- _________________________________________________________________
- | C | C | C | u | u | u | u | u | u | u | u | u | u | u | u | u |
- -----------------------------------------------------------------
- 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
-
- tp->pos = 7
- tp->bits = 3
- n->pos = 15
- n->bits=4
- KEYLENGTH=32
-*/
-
static inline t_key tkey_extract_bits(t_key a, int offset, int bits)
{
- if (offset < KEYLENGTH)
+ if (offset < KEYLENGTH)
return ((t_key)(a << offset)) >> (KEYLENGTH - bits);
- else
+ else
return 0;
}
@@ -233,8 +201,8 @@ static inline int tkey_sub_equals(t_key a, int offset, int bits, t_key b)
{
if (bits == 0 || offset >= KEYLENGTH)
return 1;
- bits = bits > KEYLENGTH ? KEYLENGTH : bits;
- return ((a ^ b) << offset) >> (KEYLENGTH - bits) == 0;
+ bits = bits > KEYLENGTH ? KEYLENGTH : bits;
+ return ((a ^ b) << offset) >> (KEYLENGTH - bits) == 0;
}
static inline int tkey_mismatch(t_key a, int offset, t_key b)
@@ -249,14 +217,6 @@ static inline int tkey_mismatch(t_key a, int offset, t_key b)
return i;
}
-/* Candiate for fib_semantics */
-
-static void fn_free_alias(struct fib_alias *fa)
-{
- fib_release_info(fa->fa_info);
- kmem_cache_free(fn_alias_kmem, fa);
-}
-
/*
To understand this stuff, an understanding of keys and all their bits is
necessary. Every node in the trie has a key associated with it, but not
@@ -295,7 +255,7 @@ static void fn_free_alias(struct fib_alias *fa)
tp->pos = 7
tp->bits = 3
n->pos = 15
- n->bits=4
+ n->bits = 4
First, let's just ignore the bits that come before the parent tp, that is
the bits from 0 to (tp->pos-1). They are *known* but at this point we do
@@ -320,60 +280,65 @@ static void fn_free_alias(struct fib_alias *fa)
*/
-static void check_tnode(struct tnode *tn)
+static inline void check_tnode(const struct tnode *tn)
{
- if (tn && tn->pos+tn->bits > 32) {
- printk("TNODE ERROR tn=%p, pos=%d, bits=%d\n", tn, tn->pos, tn->bits);
- }
+ WARN_ON(tn && tn->pos+tn->bits > 32);
}
static int halve_threshold = 25;
static int inflate_threshold = 50;
-static struct leaf *leaf_new(void)
+
+static void __alias_free_mem(struct rcu_head *head)
{
- struct leaf *l = kmalloc(sizeof(struct leaf), GFP_KERNEL);
- if (l) {
- NODE_INIT_PARENT(l, T_LEAF);
- INIT_HLIST_HEAD(&l->list);
- }
- return l;
+ struct fib_alias *fa = container_of(head, struct fib_alias, rcu);
+ kmem_cache_free(fn_alias_kmem, fa);
}
-static struct leaf_info *leaf_info_new(int plen)
+static inline void alias_free_mem_rcu(struct fib_alias *fa)
{
- struct leaf_info *li = kmalloc(sizeof(struct leaf_info), GFP_KERNEL);
- if (li) {
- li->plen = plen;
- INIT_LIST_HEAD(&li->falh);
- }
- return li;
+ call_rcu(&fa->rcu, __alias_free_mem);
+}
+
+static void __leaf_free_rcu(struct rcu_head *head)
+{
+ kfree(container_of(head, struct leaf, rcu));
+}
+
+static inline void free_leaf(struct leaf *leaf)
+{
+ call_rcu(&leaf->rcu, __leaf_free_rcu);
}
-static inline void free_leaf(struct leaf *l)
+static void __leaf_info_free_rcu(struct rcu_head *head)
{
- kfree(l);
+ kfree(container_of(head, struct leaf_info, rcu));
}
-static inline void free_leaf_info(struct leaf_info *li)
+static inline void free_leaf_info(struct leaf_info *leaf)
{
- kfree(li);
+ call_rcu(&leaf->rcu, __leaf_info_free_rcu);
}
static struct tnode *tnode_alloc(unsigned int size)
{
- if (size <= PAGE_SIZE) {
- return kmalloc(size, GFP_KERNEL);
- } else {
- return (struct tnode *)
- __get_free_pages(GFP_KERNEL, get_order(size));
- }
+ struct page *pages;
+
+ if (size <= PAGE_SIZE)
+ return kcalloc(size, 1, GFP_KERNEL);
+
+ pages = alloc_pages(GFP_KERNEL|__GFP_ZERO, get_order(size));
+ if (!pages)
+ return NULL;
+
+ return page_address(pages);
}
-static void __tnode_free(struct tnode *tn)
+static void __tnode_free_rcu(struct rcu_head *head)
{
+ struct tnode *tn = container_of(head, struct tnode, rcu);
unsigned int size = sizeof(struct tnode) +
- (1<<tn->bits) * sizeof(struct node *);
+ (1 << tn->bits) * sizeof(struct node *);
if (size <= PAGE_SIZE)
kfree(tn);
@@ -381,15 +346,40 @@ static void __tnode_free(struct tnode *tn)
free_pages((unsigned long)tn, get_order(size));
}
+static inline void tnode_free(struct tnode *tn)
+{
+ call_rcu(&tn->rcu, __tnode_free_rcu);
+}
+
+static struct leaf *leaf_new(void)
+{
+ struct leaf *l = kmalloc(sizeof(struct leaf), GFP_KERNEL);
+ if (l) {
+ l->parent = T_LEAF;
+ INIT_HLIST_HEAD(&l->list);
+ }
+ return l;
+}
+
+static struct leaf_info *leaf_info_new(int plen)
+{
+ struct leaf_info *li = kmalloc(sizeof(struct leaf_info), GFP_KERNEL);
+ if (li) {
+ li->plen = plen;
+ INIT_LIST_HEAD(&li->falh);
+ }
+ return li;
+}
+
static struct tnode* tnode_new(t_key key, int pos, int bits)
{
int nchildren = 1<<bits;
int sz = sizeof(struct tnode) + nchildren * sizeof(struct node *);
struct tnode *tn = tnode_alloc(sz);
- if (tn) {
+ if (tn) {
memset(tn, 0, sz);
- NODE_INIT_PARENT(tn, T_TNODE);
+ tn->parent = T_TNODE;
tn->pos = pos;
tn->bits = bits;
tn->key = key;
@@ -397,38 +387,17 @@ static struct tnode* tnode_new(t_key key, int pos, int bits)
tn->empty_children = 1<<bits;
}
- if (trie_debug > 0)
- printk("AT %p s=%u %u\n", tn, (unsigned int) sizeof(struct tnode),
- (unsigned int) (sizeof(struct node) * 1<<bits));
+ pr_debug("AT %p s=%u %u\n", tn, (unsigned int) sizeof(struct tnode),
+ (unsigned int) (sizeof(struct node) * 1<<bits));
return tn;
}
-static void tnode_free(struct tnode *tn)
-{
- if (!tn) {
- trie_bug("tnode_free\n");
- }
- if (IS_LEAF(tn)) {
- free_leaf((struct leaf *)tn);
- if (trie_debug > 0 )
- printk("FL %p \n", tn);
- }
- else if (IS_TNODE(tn)) {
- __tnode_free(tn);
- if (trie_debug > 0 )
- printk("FT %p \n", tn);
- }
- else {
- trie_bug("tnode_free\n");
- }
-}
-
/*
* Check whether a tnode 'n' is "full", i.e. it is an internal node
* and no bits are skipped. See discussion in dyntree paper p. 6
*/
-static inline int tnode_full(struct tnode *tn, struct node *n)
+static inline int tnode_full(const struct tnode *tn, const struct node *n)
{
if (n == NULL || IS_LEAF(n))
return 0;
@@ -448,15 +417,11 @@ static inline void put_child(struct trie *t, struct tnode *tn, int i, struct nod
static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, int wasfull)
{
- struct node *chi;
+ struct node *chi = tn->child[i];
int isfull;
- if (i >= 1<<tn->bits) {
- printk("bits=%d, i=%d\n", tn->bits, i);
- trie_bug("tnode_put_child_reorg bits");
- }
- write_lock_bh(&fib_lock);
- chi = tn->child[i];
+ BUG_ON(i >= 1<<tn->bits);
+
/* update emptyChildren */
if (n == NULL && chi != NULL)
@@ -465,33 +430,32 @@ static void tnode_put_child_reorg(struct tnode *tn, int i, struct node *n, int w
tn->empty_children--;
/* update fullChildren */
- if (wasfull == -1)
+ if (wasfull == -1)
wasfull = tnode_full(tn, chi);
isfull = tnode_full(tn, n);
if (wasfull && !isfull)
tn->full_children--;
-
else if (!wasfull && isfull)
tn->full_children++;
+
if (n)
NODE_SET_PARENT(n, tn);
- tn->child[i] = n;
- write_unlock_bh(&fib_lock);
+ rcu_assign_pointer(tn->child[i], n);
}
static struct node *resize(struct trie *t, struct tnode *tn)
{
int i;
int err = 0;
+ struct tnode *old_tn;
if (!tn)
return NULL;
- if (trie_debug)
- printk("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
- tn, inflate_threshold, halve_threshold);
+ pr_debug("In tnode_resize %p inflate_threshold=%d threshold=%d\n",
+ tn, inflate_threshold, halve_threshold);
/* No children */
if (tn->empty_children == tnode_child_length(tn)) {
@@ -501,20 +465,16 @@ static struct node *resize(struct trie *t, struct tnode *tn)
/* One child */
if (tn->empty_children == tnode_child_length(tn) - 1)
for (i = 0; i < tnode_child_length(tn); i++) {
+ struct node *n;
- write_lock_bh(&fib_lock);
- if (tn->child[i] != NULL) {
-
- /* compress one level */
- struct node *n = tn->child[i];
- if (n)
- NODE_INIT_PARENT(n, NODE_TYPE(n));
+ n = tn->child[i];
+ if (!n)
+ continue;
- write_unlock_bh(&fib_lock);
- tnode_free(tn);
- return n;
- }
- write_unlock_bh(&fib_lock);
+ /* compress one level */
+ NODE_SET_PARENT(n, NULL);
+ tnode_free(tn);
+ return n;
}
/*
* Double as long as the resulting node has a number of
@@ -566,16 +526,16 @@ static struct node *resize(struct trie *t, struct tnode *tn)
*
* expand not_to_be_doubled and to_be_doubled, and shorten:
* 100 * (tnode_child_length(tn) - tn->empty_children +
- * tn->full_children ) >= inflate_threshold * new_child_length
+ * tn->full_children) >= inflate_threshold * new_child_length
*
* expand new_child_length:
* 100 * (tnode_child_length(tn) - tn->empty_children +
- * tn->full_children ) >=
+ * tn->full_children) >=
* inflate_threshold * tnode_child_length(tn) * 2
*
* shorten again:
* 50 * (tn->full_children + tnode_child_length(tn) -
- * tn->empty_children ) >= inflate_threshold *
+ * tn->empty_children) >= inflate_threshold *
* tnode_child_length(tn)
*
*/
@@ -587,9 +547,10 @@ static struct node *resize(struct trie *t, struct tnode *tn)
50 * (tn->full_children + tnode_child_length(tn) - tn->empty_children) >=
inflate_threshold * tnode_child_length(tn))) {
- tn = inflate(t, tn, &err);
-
- if (err) {
+ old_tn = tn;
+ tn = inflate(t, tn);
+ if (IS_ERR(tn)) {
+ tn = old_tn;
#ifdef CONFIG_IP_FIB_TRIE_STATS
t->stats.resize_node_skipped++;
#endif
@@ -609,9 +570,10 @@ static struct node *resize(struct trie *t, struct tnode *tn)
100 * (tnode_child_length(tn) - tn->empty_children) <
halve_threshold * tnode_child_length(tn)) {
- tn = halve(t, tn, &err);
-
- if (err) {
+ old_tn = tn;
+ tn = halve(t, tn);
+ if (IS_ERR(tn)) {
+ tn = old_tn;
#ifdef CONFIG_IP_FIB_TRIE_STATS
t->stats.resize_node_skipped++;
#endif
@@ -621,44 +583,37 @@ static struct node *resize(struct trie *t, struct tnode *tn)
/* Only one child remains */
-
if (tn->empty_children == tnode_child_length(tn) - 1)
for (i = 0; i < tnode_child_length(tn); i++) {
-
- write_lock_bh(&fib_lock);
- if (tn->child[i] != NULL) {
- /* compress one level */
- struct node *n = tn->child[i];
-
- if (n)
- NODE_INIT_PARENT(n, NODE_TYPE(n));
-
- write_unlock_bh(&fib_lock);
- tnode_free(tn);
- return n;
- }
- write_unlock_bh(&fib_lock);
+ struct node *n;
+
+ n = tn->child[i];
+ if (!n)
+ continue;
+
+ /* compress one level */
+
+ NODE_SET_PARENT(n, NULL);
+ tnode_free(tn);
+ return n;
}
return (struct node *) tn;
}
-static struct tnode *inflate(struct trie *t, struct tnode *tn, int *err)
+static struct tnode *inflate(struct trie *t, struct tnode *tn)
{
struct tnode *inode;
struct tnode *oldtnode = tn;
int olen = tnode_child_length(tn);
int i;
- if (trie_debug)
- printk("In inflate\n");
+ pr_debug("In inflate\n");
tn = tnode_new(oldtnode->key, oldtnode->pos, oldtnode->bits + 1);
- if (!tn) {
- *err = -ENOMEM;
- return oldtnode;
- }
+ if (!tn)
+ return ERR_PTR(-ENOMEM);
/*
* Preallocate and store tnodes before the actual work so we
@@ -666,8 +621,8 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn, int *err)
* fails. In case of failure we return the oldnode and inflate
* of tnode is ignored.
*/
-
- for(i = 0; i < olen; i++) {
+
+ for (i = 0; i < olen; i++) {
struct tnode *inode = (struct tnode *) tnode_get_child(oldtnode, i);
if (inode &&
@@ -675,46 +630,30 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn, int *err)
inode->pos == oldtnode->pos + oldtnode->bits &&
inode->bits > 1) {
struct tnode *left, *right;
-
t_key m = TKEY_GET_MASK(inode->pos, 1);
left = tnode_new(inode->key&(~m), inode->pos + 1,
inode->bits - 1);
+ if (!left)
+ goto nomem;
- if (!left) {
- *err = -ENOMEM;
- break;
- }
-
right = tnode_new(inode->key|m, inode->pos + 1,
inode->bits - 1);
- if (!right) {
- *err = -ENOMEM;
- break;
- }
+ if (!right) {
+ tnode_free(left);
+ goto nomem;
+ }
put_child(t, tn, 2*i, (struct node *) left);
put_child(t, tn, 2*i+1, (struct node *) right);
}
}
- if (*err) {
- int size = tnode_child_length(tn);
- int j;
-
- for(j = 0; j < size; j++)
- if (tn->child[j])
- tnode_free((struct tnode *)tn->child[j]);
-
- tnode_free(tn);
-
- *err = -ENOMEM;
- return oldtnode;
- }
-
- for(i = 0; i < olen; i++) {
+ for (i = 0; i < olen; i++) {
struct node *node = tnode_get_child(oldtnode, i);
+ struct tnode *left, *right;
+ int size, j;
/* An empty child */
if (node == NULL)
@@ -740,76 +679,82 @@ static struct tnode *inflate(struct trie *t, struct tnode *tn, int *err)
put_child(t, tn, 2*i+1, inode->child[1]);
tnode_free(inode);
+ continue;
}
- /* An internal node with more than two children */
- else {
- struct tnode *left, *right;
- int size, j;
-
- /* We will replace this node 'inode' with two new
- * ones, 'left' and 'right', each with half of the
- * original children. The two new nodes will have
- * a position one bit further down the key and this
- * means that the "significant" part of their keys
- * (see the discussion near the top of this file)
- * will differ by one bit, which will be "0" in
- * left's key and "1" in right's key. Since we are
- * moving the key position by one step, the bit that
- * we are moving away from - the bit at position
- * (inode->pos) - is the one that will differ between
- * left and right. So... we synthesize that bit in the
- * two new keys.
- * The mask 'm' below will be a single "one" bit at
- * the position (inode->pos)
- */
-
- /* Use the old key, but set the new significant
- * bit to zero.
- */
+ /* An internal node with more than two children */
+
+ /* We will replace this node 'inode' with two new
+ * ones, 'left' and 'right', each with half of the
+ * original children. The two new nodes will have
+ * a position one bit further down the key and this
+ * means that the "significant" part of their keys
+ * (see the discussion near the top of this file)
+ * will differ by one bit, which will be "0" in
+ * left's key and "1" in right's key. Since we are
+ * moving the key position by one step, the bit that
+ * we are moving away from - the bit at position
+ * (inode->pos) - is the one that will differ between
+ * left and right. So... we synthesize that bit in the
+ * two new keys.
+ * The mask 'm' below will be a single "one" bit at
+ * the position (inode->pos)
+ */
- left = (struct tnode *) tnode_get_child(tn, 2*i);
- put_child(t, tn, 2*i, NULL);
+ /* Use the old key, but set the new significant
+ * bit to zero.
+ */
- if (!left)
- BUG();
+ left = (struct tnode *) tnode_get_child(tn, 2*i);
+ put_child(t, tn, 2*i, NULL);
- right = (struct tnode *) tnode_get_child(tn, 2*i+1);
- put_child(t, tn, 2*i+1, NULL);
+ BUG_ON(!left);
- if (!right)
- BUG();
+ right = (struct tnode *) tnode_get_child(tn, 2*i+1);
+ put_child(t, tn, 2*i+1, NULL);
- size = tnode_child_length(left);
- for(j = 0; j < size; j++) {
- put_child(t, left, j, inode->child[j]);
- put_child(t, right, j, inode->child[j + size]);
- }
- put_child(t, tn, 2*i, resize(t, left));
- put_child(t, tn, 2*i+1, resize(t, right));
+ BUG_ON(!right);
- tnode_free(inode);
+ size = tnode_child_length(left);
+ for (j = 0; j < size; j++) {
+ put_child(t, left, j, inode->child[j]);
+ put_child(t, right, j, inode->child[j + size]);
}
+ put_child(t, tn, 2*i, resize(t, left));
+ put_child(t, tn, 2*i+1, resize(t, right));
+
+ tnode_free(inode);
}
tnode_free(oldtnode);
return tn;
+nomem:
+ {
+ int size = tnode_child_length(tn);
+ int j;
+
+ for (j = 0; j < size; j++)
+ if (tn->child[j])
+ tnode_free((struct tnode *)tn->child[j]);
+
+ tnode_free(tn);
+
+ return ERR_PTR(-ENOMEM);
+ }
}
-static struct tnode *halve(struct trie *t, struct tnode *tn, int *err)
+static struct tnode *halve(struct trie *t, struct tnode *tn)
{
struct tnode *oldtnode = tn;
struct node *left, *right;
int i;
int olen = tnode_child_length(tn);
- if (trie_debug) printk("In halve\n");
+ pr_debug("In halve\n");
tn = tnode_new(oldtnode->key, oldtnode->pos, oldtnode->bits - 1);
- if (!tn) {
- *err = -ENOMEM;
- return oldtnode;
- }
+ if (!tn)
+ return ERR_PTR(-ENOMEM);
/*
* Preallocate and store tnodes before the actual work so we
@@ -818,38 +763,27 @@ static struct tnode *halve(struct trie *t, struct tnode *tn, int *err)
* of tnode is ignored.
*/
- for(i = 0; i < olen; i += 2) {
+ for (i = 0; i < olen; i += 2) {
left = tnode_get_child(oldtnode, i);
right = tnode_get_child(oldtnode, i+1);
/* Two nonempty children */
- if (left && right) {
- struct tnode *newBinNode =
- tnode_new(left->key, tn->pos + tn->bits, 1);
+ if (left && right) {
+ struct tnode *newn;
- if (!newBinNode) {
- *err = -ENOMEM;
- break;
- }
- put_child(t, tn, i/2, (struct node *)newBinNode);
- }
- }
+ newn = tnode_new(left->key, tn->pos + tn->bits, 1);
- if (*err) {
- int size = tnode_child_length(tn);
- int j;
+ if (!newn)
+ goto nomem;
- for(j = 0; j < size; j++)
- if (tn->child[j])
- tnode_free((struct tnode *)tn->child[j]);
+ put_child(t, tn, i/2, (struct node *)newn);
+ }
- tnode_free(tn);
-
- *err = -ENOMEM;
- return oldtnode;
}
- for(i = 0; i < olen; i += 2) {
+ for (i = 0; i < olen; i += 2) {
+ struct tnode *newBinNode;
+
left = tnode_get_child(oldtnode, i);
right = tnode_get_child(oldtnode, i+1);
@@ -858,88 +792,99 @@ static struct tnode *halve(struct trie *t, struct tnode *tn, int *err)
if (right == NULL) /* Both are empty */
continue;
put_child(t, tn, i/2, right);
- } else if (right == NULL)
+ continue;
+ }
+
+ if (right == NULL) {
put_child(t, tn, i/2, left);
+ continue;
+ }
/* Two nonempty children */
- else {
- struct tnode *newBinNode =
- (struct tnode *) tnode_get_child(tn, i/2);
- put_child(t, tn, i/2, NULL);
-
- if (!newBinNode)
- BUG();
-
- put_child(t, newBinNode, 0, left);
- put_child(t, newBinNode, 1, right);
- put_child(t, tn, i/2, resize(t, newBinNode));
- }
+ newBinNode = (struct tnode *) tnode_get_child(tn, i/2);
+ put_child(t, tn, i/2, NULL);
+ put_child(t, newBinNode, 0, left);
+ put_child(t, newBinNode, 1, right);
+ put_child(t, tn, i/2, resize(t, newBinNode));
}
tnode_free(oldtnode);
return tn;
+nomem:
+ {
+ int size = tnode_child_length(tn);
+ int j;
+
+ for (j = 0; j < size; j++)
+ if (tn->child[j])
+ tnode_free((struct tnode *)tn->child[j]);
+
+ tnode_free(tn);
+
+ return ERR_PTR(-ENOMEM);
+ }
}
-static void *trie_init(struct trie *t)
+static void trie_init(struct trie *t)
{
- if (t) {
- t->size = 0;
- t->trie = NULL;
- t->revision = 0;
+ if (!t)
+ return;
+
+ t->size = 0;
+ rcu_assign_pointer(t->trie, NULL);
+ t->revision = 0;
#ifdef CONFIG_IP_FIB_TRIE_STATS
- memset(&t->stats, 0, sizeof(struct trie_use_stats));
+ memset(&t->stats, 0, sizeof(struct trie_use_stats));
#endif
- }
- return t;
}
+/* readside most use rcu_read_lock currently dump routines
+ via get_fa_head and dump */
+
static struct leaf_info *find_leaf_info(struct hlist_head *head, int plen)
{
struct hlist_node *node;
struct leaf_info *li;
- hlist_for_each_entry(li, node, head, hlist) {
+ hlist_for_each_entry_rcu(li, node, head, hlist)
if (li->plen == plen)
return li;
- }
+
return NULL;
}
static inline struct list_head * get_fa_head(struct leaf *l, int plen)
{
- struct list_head *fa_head = NULL;
struct leaf_info *li = find_leaf_info(&l->list, plen);
- if (li)
- fa_head = &li->falh;
+ if (!li)
+ return NULL;
- return fa_head;
+ return &li->falh;
}
static void insert_leaf_info(struct hlist_head *head, struct leaf_info *new)
{
- struct leaf_info *li = NULL, *last = NULL;
- struct hlist_node *node, *tmp;
-
- write_lock_bh(&fib_lock);
-
- if (hlist_empty(head))
- hlist_add_head(&new->hlist, head);
- else {
- hlist_for_each_entry_safe(li, node, tmp, head, hlist) {
-
- if (new->plen > li->plen)
- break;
-
- last = li;
- }
- if (last)
- hlist_add_after(&last->hlist, &new->hlist);
- else
- hlist_add_before(&new->hlist, &li->hlist);
- }
- write_unlock_bh(&fib_lock);
+ struct leaf_info *li = NULL, *last = NULL;
+ struct hlist_node *node;
+
+ if (hlist_empty(head)) {
+ hlist_add_head_rcu(&new->hlist, head);
+ } else {
+ hlist_for_each_entry(li, node, head, hlist) {
+ if (new->plen > li->plen)
+ break;
+
+ last = li;
+ }
+ if (last)
+ hlist_add_after_rcu(&last->hlist, &new->hlist);
+ else
+ hlist_add_before_rcu(&new->hlist, &li->hlist);
+ }
}
+/* rcu_read_lock needs to be hold by caller from readside */
+
static struct leaf *
fib_find_node(struct trie *t, u32 key)
{
@@ -948,61 +893,43 @@ fib_find_node(struct trie *t, u32 key)
struct node *n;
pos = 0;
- n = t->trie;
+ n = rcu_dereference(t->trie);
while (n != NULL && NODE_TYPE(n) == T_TNODE) {
tn = (struct tnode *) n;
-
+
check_tnode(tn);
-
+
if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
- pos=tn->pos + tn->bits;
+ pos = tn->pos + tn->bits;
n = tnode_get_child(tn, tkey_extract_bits(key, tn->pos, tn->bits));
- }
- else
+ } else
break;
}
/* Case we have found a leaf. Compare prefixes */
- if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key)) {
- struct leaf *l = (struct leaf *) n;
- return l;
- }
+ if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key))
+ return (struct leaf *)n;
+
return NULL;
}
static struct node *trie_rebalance(struct trie *t, struct tnode *tn)
{
- int i = 0;
int wasfull;
t_key cindex, key;
struct tnode *tp = NULL;
- if (!tn)
- BUG();
-
key = tn->key;
- i = 0;
while (tn != NULL && NODE_PARENT(tn) != NULL) {
- if (i > 10) {
- printk("Rebalance tn=%p \n", tn);
- if (tn) printk("tn->parent=%p \n", NODE_PARENT(tn));
-
- printk("Rebalance tp=%p \n", tp);
- if (tp) printk("tp->parent=%p \n", NODE_PARENT(tp));
- }
-
- if (i > 12) BUG();
- i++;
-
tp = NODE_PARENT(tn);
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
wasfull = tnode_full(tp, tnode_get_child(tp, cindex));
tn = (struct tnode *) resize (t, (struct tnode *)tn);
tnode_put_child_reorg((struct tnode *)tp, cindex,(struct node*)tn, wasfull);
-
+
if (!NODE_PARENT(tn))
break;
@@ -1015,6 +942,8 @@ static struct node *trie_rebalance(struct trie *t, struct tnode *tn)
return (struct node*) tn;
}
+/* only used from updater-side */
+
static struct list_head *
fib_insert_node(struct trie *t, int *err, u32 key, int plen)
{
@@ -1050,20 +979,16 @@ fib_insert_node(struct trie *t, int *err, u32 key, int plen)
while (n != NULL && NODE_TYPE(n) == T_TNODE) {
tn = (struct tnode *) n;
-
+
check_tnode(tn);
-
+
if (tkey_sub_equals(tn->key, pos, tn->pos-pos, key)) {
tp = tn;
- pos=tn->pos + tn->bits;
+ pos = tn->pos + tn->bits;
n = tnode_get_child(tn, tkey_extract_bits(key, tn->pos, tn->bits));
- if (n && NODE_PARENT(n) != tn) {
- printk("BUG tn=%p, n->parent=%p\n", tn, NODE_PARENT(n));
- BUG();
- }
- }
- else
+ BUG_ON(n && NODE_PARENT(n) != tn);
+ } else
break;
}
@@ -1073,17 +998,15 @@ fib_insert_node(struct trie *t, int *err, u32 key, int plen)
* tp is n's (parent) ----> NULL or TNODE
*/
- if (tp && IS_LEAF(tp))
- BUG();
-
+ BUG_ON(tp && IS_LEAF(tp));
/* Case 1: n is a leaf. Compare prefixes */
if (n != NULL && IS_LEAF(n) && tkey_equals(key, n->key)) {
- struct leaf *l = ( struct leaf *) n;
-
+ struct leaf *l = (struct leaf *) n;
+
li = leaf_info_new(plen);
-
+
if (!li) {
*err = -ENOMEM;
goto err;
@@ -1113,35 +1036,29 @@ fib_insert_node(struct trie *t, int *err, u32 key, int plen)
fa_head = &li->falh;
insert_leaf_info(&l->list, li);
- /* Case 2: n is NULL, and will just insert a new leaf */
if (t->trie && n == NULL) {
+ /* Case 2: n is NULL, and will just insert a new leaf */
NODE_SET_PARENT(l, tp);
-
- if (!tp)
- BUG();
- else {
- cindex = tkey_extract_bits(key, tp->pos, tp->bits);
- put_child(t, (struct tnode *)tp, cindex, (struct node *)l);
- }
- }
- /* Case 3: n is a LEAF or a TNODE and the key doesn't match. */
- else {
+ cindex = tkey_extract_bits(key, tp->pos, tp->bits);
+ put_child(t, (struct tnode *)tp, cindex, (struct node *)l);
+ } else {
+ /* Case 3: n is a LEAF or a TNODE and the key doesn't match. */
/*
* Add a new tnode here
* first tnode need some special handling
*/
if (tp)
- pos=tp->pos+tp->bits;
+ pos = tp->pos+tp->bits;
else
- pos=0;
+ pos = 0;
+
if (n) {
newpos = tkey_mismatch(key, pos, n->key);
tn = tnode_new(n->key, newpos, 1);
- }
- else {
+ } else {
newpos = 0;
tn = tnode_new(key, newpos, 1); /* First tnode */
}
@@ -1151,32 +1068,33 @@ fib_insert_node(struct trie *t, int *err, u32 key, int plen)
tnode_free((struct tnode *) l);
*err = -ENOMEM;
goto err;
- }
-
+ }
+
NODE_SET_PARENT(tn, tp);
- missbit=tkey_extract_bits(key, newpos, 1);
+ missbit = tkey_extract_bits(key, newpos, 1);
put_child(t, tn, missbit, (struct node *)l);
put_child(t, tn, 1-missbit, n);
if (tp) {
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
put_child(t, (struct tnode *)tp, cindex, (struct node *)tn);
- }
- else {
- t->trie = (struct node*) tn; /* First tnode */
+ } else {
+ rcu_assign_pointer(t->trie, (struct node *)tn); /* First tnode */
tp = tn;
}
}
- if (tp && tp->pos+tp->bits > 32) {
+
+ if (tp && tp->pos + tp->bits > 32)
printk("ERROR tp=%p pos=%d, bits=%d, key=%0x plen=%d\n",
tp, tp->pos, tp->bits, key, plen);
- }
+
/* Rebalance the trie */
- t->trie = trie_rebalance(t, tp);
+
+ rcu_assign_pointer(t->trie, trie_rebalance(t, tp));
done:
t->revision++;
-err:;
+err:
return fa_head;
}
@@ -1204,17 +1122,18 @@ fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
key = ntohl(key);
- if (trie_debug)
- printk("Insert table=%d %08x/%d\n", tb->tb_id, key, plen);
+ pr_debug("Insert table=%d %08x/%d\n", tb->tb_id, key, plen);
- mask = ntohl( inet_make_mask(plen) );
+ mask = ntohl(inet_make_mask(plen));
if (key & ~mask)
return -EINVAL;
key = key & mask;
- if ((fi = fib_create_info(r, rta, nlhdr, &err)) == NULL)
+ fi = fib_create_info(r, rta, nlhdr, &err);
+
+ if (!fi)
goto err;
l = fib_find_node(t, key);
@@ -1236,8 +1155,7 @@ fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
* and we need to allocate a new one of those as well.
*/
- if (fa &&
- fa->fa_info->fib_priority == fi->fib_priority) {
+ if (fa && fa->fa_info->fib_priority == fi->fib_priority) {
struct fib_alias *fa_orig;
err = -EEXIST;
@@ -1248,22 +1166,27 @@ fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
struct fib_info *fi_drop;
u8 state;
- write_lock_bh(&fib_lock);
+ err = -ENOBUFS;
+ new_fa = kmem_cache_alloc(fn_alias_kmem, SLAB_KERNEL);
+ if (new_fa == NULL)
+ goto out;
fi_drop = fa->fa_info;
- fa->fa_info = fi;
- fa->fa_type = type;
- fa->fa_scope = r->rtm_scope;
+ new_fa->fa_tos = fa->fa_tos;
+ new_fa->fa_info = fi;
+ new_fa->fa_type = type;
+ new_fa->fa_scope = r->rtm_scope;
state = fa->fa_state;
- fa->fa_state &= ~FA_S_ACCESSED;
+ new_fa->fa_state &= ~FA_S_ACCESSED;
- write_unlock_bh(&fib_lock);
+ list_replace_rcu(&fa->fa_list, &new_fa->fa_list);
+ alias_free_mem_rcu(fa);
fib_release_info(fi_drop);
if (state & FA_S_ACCESSED)
- rt_cache_flush(-1);
+ rt_cache_flush(-1);
- goto succeeded;
+ goto succeeded;
}
/* Error if we find a perfect match which
* uses the same scope, type, and nexthop
@@ -1285,7 +1208,7 @@ fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
fa = fa_orig;
}
err = -ENOENT;
- if (!(nlhdr->nlmsg_flags&NLM_F_CREATE))
+ if (!(nlhdr->nlmsg_flags & NLM_F_CREATE))
goto out;
err = -ENOBUFS;
@@ -1298,9 +1221,6 @@ fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
new_fa->fa_type = type;
new_fa->fa_scope = r->rtm_scope;
new_fa->fa_state = 0;
-#if 0
- new_fa->dst = NULL;
-#endif
/*
* Insert new entry to the list.
*/
@@ -1312,12 +1232,8 @@ fn_trie_insert(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
goto out_free_new_fa;
}
- write_lock_bh(&fib_lock);
-
- list_add_tail(&new_fa->fa_list,
- (fa ? &fa->fa_list : fa_head));
-
- write_unlock_bh(&fib_lock);
+ list_add_tail_rcu(&new_fa->fa_list,
+ (fa ? &fa->fa_list : fa_head));
rt_cache_flush(-1);
rtmsg_fib(RTM_NEWROUTE, htonl(key), new_fa, plen, tb->tb_id, nlhdr, req);
@@ -1328,38 +1244,40 @@ out_free_new_fa:
kmem_cache_free(fn_alias_kmem, new_fa);
out:
fib_release_info(fi);
-err:;
+err:
return err;
}
-static inline int check_leaf(struct trie *t, struct leaf *l, t_key key, int *plen, const struct flowi *flp,
- struct fib_result *res, int *err)
+
+/* should be clalled with rcu_read_lock */
+static inline int check_leaf(struct trie *t, struct leaf *l,
+ t_key key, int *plen, const struct flowi *flp,
+ struct fib_result *res)
{
- int i;
+ int err, i;
t_key mask;
struct leaf_info *li;
struct hlist_head *hhead = &l->list;
struct hlist_node *node;
- hlist_for_each_entry(li, node, hhead, hlist) {
-
+ hlist_for_each_entry_rcu(li, node, hhead, hlist) {
i = li->plen;
mask = ntohl(inet_make_mask(i));
if (l->key != (key & mask))
continue;
- if (((*err) = fib_semantic_match(&li->falh, flp, res, l->key, mask, i)) == 0) {
+ if ((err = fib_semantic_match(&li->falh, flp, res, l->key, mask, i)) <= 0) {
*plen = i;
#ifdef CONFIG_IP_FIB_TRIE_STATS
t->stats.semantic_match_passed++;
#endif
- return 1;
+ return err;
}
#ifdef CONFIG_IP_FIB_TRIE_STATS
t->stats.semantic_match_miss++;
#endif
}
- return 0;
+ return 1;
}
static int
@@ -1370,13 +1288,17 @@ fn_trie_lookup(struct fib_table *tb, const struct flowi *flp, struct fib_result
struct node *n;
struct tnode *pn;
int pos, bits;
- t_key key=ntohl(flp->fl4_dst);
+ t_key key = ntohl(flp->fl4_dst);
int chopped_off;
t_key cindex = 0;
int current_prefix_length = KEYLENGTH;
- n = t->trie;
+ struct tnode *cn;
+ t_key node_prefix, key_prefix, pref_mismatch;
+ int mp;
+
+ rcu_read_lock();
- read_lock(&fib_lock);
+ n = rcu_dereference(t->trie);
if (!n)
goto failed;
@@ -1386,15 +1308,14 @@ fn_trie_lookup(struct fib_table *tb, const struct flowi *flp, struct fib_result
/* Just a leaf? */
if (IS_LEAF(n)) {
- if (check_leaf(t, (struct leaf *)n, key, &plen, flp, res, &ret))
+ if ((ret = check_leaf(t, (struct leaf *)n, key, &plen, flp, res)) <= 0)
goto found;
goto failed;
}
pn = (struct tnode *) n;
chopped_off = 0;
- while (pn) {
-
+ while (pn) {
pos = pn->pos;
bits = pn->bits;
@@ -1410,130 +1331,129 @@ fn_trie_lookup(struct fib_table *tb, const struct flowi *flp, struct fib_result
goto backtrace;
}
- if (IS_TNODE(n)) {
+ if (IS_LEAF(n)) {
+ if ((ret = check_leaf(t, (struct leaf *)n, key, &plen, flp, res)) <= 0)
+ goto found;
+ else
+ goto backtrace;
+ }
+
#define HL_OPTIMIZE
#ifdef HL_OPTIMIZE
- struct tnode *cn = (struct tnode *)n;
- t_key node_prefix, key_prefix, pref_mismatch;
- int mp;
+ cn = (struct tnode *)n;
- /*
- * It's a tnode, and we can do some extra checks here if we
- * like, to avoid descending into a dead-end branch.
- * This tnode is in the parent's child array at index
- * key[p_pos..p_pos+p_bits] but potentially with some bits
- * chopped off, so in reality the index may be just a
- * subprefix, padded with zero at the end.
- * We can also take a look at any skipped bits in this
- * tnode - everything up to p_pos is supposed to be ok,
- * and the non-chopped bits of the index (se previous
- * paragraph) are also guaranteed ok, but the rest is
- * considered unknown.
- *
- * The skipped bits are key[pos+bits..cn->pos].
- */
-
- /* If current_prefix_length < pos+bits, we are already doing
- * actual prefix matching, which means everything from
- * pos+(bits-chopped_off) onward must be zero along some
- * branch of this subtree - otherwise there is *no* valid
- * prefix present. Here we can only check the skipped
- * bits. Remember, since we have already indexed into the
- * parent's child array, we know that the bits we chopped of
- * *are* zero.
- */
+ /*
+ * It's a tnode, and we can do some extra checks here if we
+ * like, to avoid descending into a dead-end branch.
+ * This tnode is in the parent's child array at index
+ * key[p_pos..p_pos+p_bits] but potentially with some bits
+ * chopped off, so in reality the index may be just a
+ * subprefix, padded with zero at the end.
+ * We can also take a look at any skipped bits in this
+ * tnode - everything up to p_pos is supposed to be ok,
+ * and the non-chopped bits of the index (se previous
+ * paragraph) are also guaranteed ok, but the rest is
+ * considered unknown.
+ *
+ * The skipped bits are key[pos+bits..cn->pos].
+ */
- /* NOTA BENE: CHECKING ONLY SKIPPED BITS FOR THE NEW NODE HERE */
-
- if (current_prefix_length < pos+bits) {
- if (tkey_extract_bits(cn->key, current_prefix_length,
- cn->pos - current_prefix_length) != 0 ||
- !(cn->child[0]))
- goto backtrace;
- }
+ /* If current_prefix_length < pos+bits, we are already doing
+ * actual prefix matching, which means everything from
+ * pos+(bits-chopped_off) onward must be zero along some
+ * branch of this subtree - otherwise there is *no* valid
+ * prefix present. Here we can only check the skipped
+ * bits. Remember, since we have already indexed into the
+ * parent's child array, we know that the bits we chopped of
+ * *are* zero.
+ */
- /*
- * If chopped_off=0, the index is fully validated and we
- * only need to look at the skipped bits for this, the new,
- * tnode. What we actually want to do is to find out if
- * these skipped bits match our key perfectly, or if we will
- * have to count on finding a matching prefix further down,
- * because if we do, we would like to have some way of
- * verifying the existence of such a prefix at this point.
- */
+ /* NOTA BENE: CHECKING ONLY SKIPPED BITS FOR THE NEW NODE HERE */
- /* The only thing we can do at this point is to verify that
- * any such matching prefix can indeed be a prefix to our
- * key, and if the bits in the node we are inspecting that
- * do not match our key are not ZERO, this cannot be true.
- * Thus, find out where there is a mismatch (before cn->pos)
- * and verify that all the mismatching bits are zero in the
- * new tnode's key.
- */
+ if (current_prefix_length < pos+bits) {
+ if (tkey_extract_bits(cn->key, current_prefix_length,
+ cn->pos - current_prefix_length) != 0 ||
+ !(cn->child[0]))
+ goto backtrace;
+ }
- /* Note: We aren't very concerned about the piece of the key
- * that precede pn->pos+pn->bits, since these have already been
- * checked. The bits after cn->pos aren't checked since these are
- * by definition "unknown" at this point. Thus, what we want to
- * see is if we are about to enter the "prefix matching" state,
- * and in that case verify that the skipped bits that will prevail
- * throughout this subtree are zero, as they have to be if we are
- * to find a matching prefix.
- */
+ /*
+ * If chopped_off=0, the index is fully validated and we
+ * only need to look at the skipped bits for this, the new,
+ * tnode. What we actually want to do is to find out if
+ * these skipped bits match our key perfectly, or if we will
+ * have to count on finding a matching prefix further down,
+ * because if we do, we would like to have some way of
+ * verifying the existence of such a prefix at this point.
+ */
- node_prefix = MASK_PFX(cn->key, cn->pos);
- key_prefix = MASK_PFX(key, cn->pos);
- pref_mismatch = key_prefix^node_prefix;
- mp = 0;
+ /* The only thing we can do at this point is to verify that
+ * any such matching prefix can indeed be a prefix to our
+ * key, and if the bits in the node we are inspecting that
+ * do not match our key are not ZERO, this cannot be true.
+ * Thus, find out where there is a mismatch (before cn->pos)
+ * and verify that all the mismatching bits are zero in the
+ * new tnode's key.
+ */
- /* In short: If skipped bits in this node do not match the search
- * key, enter the "prefix matching" state.directly.
- */
- if (pref_mismatch) {
- while (!(pref_mismatch & (1<<(KEYLENGTH-1)))) {
- mp++;
- pref_mismatch = pref_mismatch <<1;
- }
- key_prefix = tkey_extract_bits(cn->key, mp, cn->pos-mp);
-
- if (key_prefix != 0)
- goto backtrace;
-
- if (current_prefix_length >= cn->pos)
- current_prefix_length=mp;
- }
-#endif
- pn = (struct tnode *)n; /* Descend */
- chopped_off = 0;
- continue;
+ /* Note: We aren't very concerned about the piece of the key
+ * that precede pn->pos+pn->bits, since these have already been
+ * checked. The bits after cn->pos aren't checked since these are
+ * by definition "unknown" at this point. Thus, what we want to
+ * see is if we are about to enter the "prefix matching" state,
+ * and in that case verify that the skipped bits that will prevail
+ * throughout this subtree are zero, as they have to be if we are
+ * to find a matching prefix.
+ */
+
+ node_prefix = MASK_PFX(cn->key, cn->pos);
+ key_prefix = MASK_PFX(key, cn->pos);
+ pref_mismatch = key_prefix^node_prefix;
+ mp = 0;
+
+ /* In short: If skipped bits in this node do not match the search
+ * key, enter the "prefix matching" state.directly.
+ */
+ if (pref_mismatch) {
+ while (!(pref_mismatch & (1<<(KEYLENGTH-1)))) {
+ mp++;
+ pref_mismatch = pref_mismatch <<1;
+ }
+ key_prefix = tkey_extract_bits(cn->key, mp, cn->pos-mp);
+
+ if (key_prefix != 0)
+ goto backtrace;
+
+ if (current_prefix_length >= cn->pos)
+ current_prefix_length = mp;
}
- if (IS_LEAF(n)) {
- if (check_leaf(t, (struct leaf *)n, key, &plen, flp, res, &ret))
- goto found;
- }
+#endif
+ pn = (struct tnode *)n; /* Descend */
+ chopped_off = 0;
+ continue;
+
backtrace:
chopped_off++;
/* As zero don't change the child key (cindex) */
- while ((chopped_off <= pn->bits) && !(cindex & (1<<(chopped_off-1)))) {
+ while ((chopped_off <= pn->bits) && !(cindex & (1<<(chopped_off-1))))
chopped_off++;
- }
/* Decrease current_... with bits chopped off */
if (current_prefix_length > pn->pos + pn->bits - chopped_off)
current_prefix_length = pn->pos + pn->bits - chopped_off;
-
+
/*
* Either we do the actual chop off according or if we have
* chopped off all bits in this tnode walk up to our parent.
*/
- if (chopped_off <= pn->bits)
+ if (chopped_off <= pn->bits) {
cindex &= ~(1 << (chopped_off-1));
- else {
+ } else {
if (NODE_PARENT(pn) == NULL)
goto failed;
-
+
/* Get Child's index */
cindex = tkey_extract_bits(pn->key, NODE_PARENT(pn)->pos, NODE_PARENT(pn)->bits);
pn = NODE_PARENT(pn);
@@ -1548,10 +1468,11 @@ backtrace:
failed:
ret = 1;
found:
- read_unlock(&fib_lock);
+ rcu_read_unlock();
return ret;
}
+/* only called from updater side */
static int trie_leaf_remove(struct trie *t, t_key key)
{
t_key cindex;
@@ -1559,24 +1480,20 @@ static int trie_leaf_remove(struct trie *t, t_key key)
struct node *n = t->trie;
struct leaf *l;
- if (trie_debug)
- printk("entering trie_leaf_remove(%p)\n", n);
+ pr_debug("entering trie_leaf_remove(%p)\n", n);
/* Note that in the case skipped bits, those bits are *not* checked!
* When we finish this, we will have NULL or a T_LEAF, and the
* T_LEAF may or may not match our key.
*/
- while (n != NULL && IS_TNODE(n)) {
+ while (n != NULL && IS_TNODE(n)) {
struct tnode *tn = (struct tnode *) n;
check_tnode(tn);
n = tnode_get_child(tn ,tkey_extract_bits(key, tn->pos, tn->bits));
- if (n && NODE_PARENT(n) != tn) {
- printk("BUG tn=%p, n->parent=%p\n", tn, NODE_PARENT(n));
- BUG();
- }
- }
+ BUG_ON(n && NODE_PARENT(n) != tn);
+ }
l = (struct leaf *) n;
if (!n || !tkey_equals(l->key, key))
@@ -1590,23 +1507,24 @@ static int trie_leaf_remove(struct trie *t, t_key key)
t->revision++;
t->size--;
+ preempt_disable();
tp = NODE_PARENT(n);
tnode_free((struct tnode *) n);
if (tp) {
cindex = tkey_extract_bits(key, tp->pos, tp->bits);
put_child(t, (struct tnode *)tp, cindex, NULL);
- t->trie = trie_rebalance(t, tp);
- }
- else
- t->trie = NULL;
+ rcu_assign_pointer(t->trie, trie_rebalance(t, tp));
+ } else
+ rcu_assign_pointer(t->trie, NULL);
+ preempt_enable();
return 1;
}
static int
fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
- struct nlmsghdr *nlhdr, struct netlink_skb_parms *req)
+ struct nlmsghdr *nlhdr, struct netlink_skb_parms *req)
{
struct trie *t = (struct trie *) tb->tb_data;
u32 key, mask;
@@ -1615,6 +1533,8 @@ fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
struct fib_alias *fa, *fa_to_delete;
struct list_head *fa_head;
struct leaf *l;
+ struct leaf_info *li;
+
if (plen > 32)
return -EINVAL;
@@ -1624,7 +1544,7 @@ fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
memcpy(&key, rta->rta_dst, 4);
key = ntohl(key);
- mask = ntohl( inet_make_mask(plen) );
+ mask = ntohl(inet_make_mask(plen));
if (key & ~mask)
return -EINVAL;
@@ -1641,11 +1561,11 @@ fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
if (!fa)
return -ESRCH;
- if (trie_debug)
- printk("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
+ pr_debug("Deleting %08x/%d tos=%d t=%p\n", key, plen, tos, t);
fa_to_delete = NULL;
fa_head = fa->fa_list.prev;
+
list_for_each_entry(fa, fa_head, fa_list) {
struct fib_info *fi = fa->fa_info;
@@ -1664,39 +1584,31 @@ fn_trie_delete(struct fib_table *tb, struct rtmsg *r, struct kern_rta *rta,
}
}
- if (fa_to_delete) {
- int kill_li = 0;
- struct leaf_info *li;
-
- fa = fa_to_delete;
- rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id, nlhdr, req);
+ if (!fa_to_delete)
+ return -ESRCH;
- l = fib_find_node(t, key);
- li = find_leaf_info(&l->list, plen);
+ fa = fa_to_delete;
+ rtmsg_fib(RTM_DELROUTE, htonl(key), fa, plen, tb->tb_id, nlhdr, req);
- write_lock_bh(&fib_lock);
+ l = fib_find_node(t, key);
+ li = find_leaf_info(&l->list, plen);
- list_del(&fa->fa_list);
+ list_del_rcu(&fa->fa_list);
- if (list_empty(fa_head)) {
- hlist_del(&li->hlist);
- kill_li = 1;
- }
- write_unlock_bh(&fib_lock);
-
- if (kill_li)
- free_leaf_info(li);
+ if (list_empty(fa_head)) {
+ hlist_del_rcu(&li->hlist);
+ free_leaf_info(li);
+ }
- if (hlist_empty(&l->list))
- trie_leaf_remove(t, key);
+ if (hlist_empty(&l->list))
+ trie_leaf_remove(t, key);
- if (fa->fa_state & FA_S_ACCESSED)
- rt_cache_flush(-1);
+ if (fa->fa_state & FA_S_ACCESSED)
+ rt_cache_flush(-1);
- fn_free_alias(fa);
- return 0;
- }
- return -ESRCH;
+ fib_release_info(fa->fa_info);
+ alias_free_mem_rcu(fa);
+ return 0;
}
static int trie_flush_list(struct trie *t, struct list_head *head)
@@ -1706,14 +1618,11 @@ static int trie_flush_list(struct trie *t, struct list_head *head)
list_for_each_entry_safe(fa, fa_node, head, fa_list) {
struct fib_info *fi = fa->fa_info;
-
- if (fi && (fi->fib_flags&RTNH_F_DEAD)) {
-
- write_lock_bh(&fib_lock);
- list_del(&fa->fa_list);
- write_unlock_bh(&fib_lock);
- fn_free_alias(fa);
+ if (fi && (fi->fib_flags & RTNH_F_DEAD)) {
+ list_del_rcu(&fa->fa_list);
+ fib_release_info(fa->fa_info);
+ alias_free_mem_rcu(fa);
found++;
}
}
@@ -1728,37 +1637,34 @@ static int trie_flush_leaf(struct trie *t, struct leaf *l)
struct leaf_info *li = NULL;
hlist_for_each_entry_safe(li, node, tmp, lih, hlist) {
-
found += trie_flush_list(t, &li->falh);
if (list_empty(&li->falh)) {
-
- write_lock_bh(&fib_lock);
- hlist_del(&li->hlist);
- write_unlock_bh(&fib_lock);
-
+ hlist_del_rcu(&li->hlist);
free_leaf_info(li);
}
}
return found;
}
+/* rcu_read_lock needs to be hold by caller from readside */
+
static struct leaf *nextleaf(struct trie *t, struct leaf *thisleaf)
{
struct node *c = (struct node *) thisleaf;
struct tnode *p;
int idx;
+ struct node *trie = rcu_dereference(t->trie);
if (c == NULL) {
- if (t->trie == NULL)
+ if (trie == NULL)
return NULL;
- if (IS_LEAF(t->trie)) /* trie w. just a leaf */
- return (struct leaf *) t->trie;
+ if (IS_LEAF(trie)) /* trie w. just a leaf */
+ return (struct leaf *) trie;
- p = (struct tnode*) t->trie; /* Start */
- }
- else
+ p = (struct tnode*) trie; /* Start */
+ } else
p = (struct tnode *) NODE_PARENT(c);
while (p) {
@@ -1771,29 +1677,31 @@ static struct leaf *nextleaf(struct trie *t, struct leaf *thisleaf)
pos = 0;
last = 1 << p->bits;
- for(idx = pos; idx < last ; idx++) {
- if (p->child[idx]) {
-
- /* Decend if tnode */
-
- while (IS_TNODE(p->child[idx])) {
- p = (struct tnode*) p->child[idx];
- idx = 0;
-
- /* Rightmost non-NULL branch */
- if (p && IS_TNODE(p))
- while (p->child[idx] == NULL && idx < (1 << p->bits)) idx++;
-
- /* Done with this tnode? */
- if (idx >= (1 << p->bits) || p->child[idx] == NULL )
- goto up;
- }
- return (struct leaf*) p->child[idx];
+ for (idx = pos; idx < last ; idx++) {
+ c = rcu_dereference(p->child[idx]);
+
+ if (!c)
+ continue;
+
+ /* Decend if tnode */
+ while (IS_TNODE(c)) {
+ p = (struct tnode *) c;
+ idx = 0;
+
+ /* Rightmost non-NULL branch */
+ if (p && IS_TNODE(p))
+ while (!(c = rcu_dereference(p->child[idx]))
+ && idx < (1<<p->bits)) idx++;
+
+ /* Done with this tnode? */
+ if (idx >= (1 << p->bits) || !c)
+ goto up;
}
+ return (struct leaf *) c;
}
up:
/* No more children go up one step */
- c = (struct node*) p;
+ c = (struct node *) p;
p = (struct tnode *) NODE_PARENT(p);
}
return NULL; /* Ready. Root of trie */
@@ -1807,23 +1715,24 @@ static int fn_trie_flush(struct fib_table *tb)
t->revision++;
- for (h=0; (l = nextleaf(t, l)) != NULL; h++) {
+ rcu_read_lock();
+ for (h = 0; (l = nextleaf(t, l)) != NULL; h++) {
found += trie_flush_leaf(t, l);
if (ll && hlist_empty(&ll->list))
trie_leaf_remove(t, ll->key);
ll = l;
}
+ rcu_read_unlock();
if (ll && hlist_empty(&ll->list))
trie_leaf_remove(t, ll->key);
- if (trie_debug)
- printk("trie_flush found=%d\n", found);
+ pr_debug("trie_flush found=%d\n", found);
return found;
}
-static int trie_last_dflt=-1;
+static int trie_last_dflt = -1;
static void
fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
@@ -1840,7 +1749,7 @@ fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
last_resort = NULL;
order = -1;
- read_lock(&fib_lock);
+ rcu_read_lock();
l = fib_find_node(t, 0);
if (!l)
@@ -1853,20 +1762,20 @@ fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
if (list_empty(fa_head))
goto out;
- list_for_each_entry(fa, fa_head, fa_list) {
+ list_for_each_entry_rcu(fa, fa_head, fa_list) {
struct fib_info *next_fi = fa->fa_info;
-
+
if (fa->fa_scope != res->scope ||
fa->fa_type != RTN_UNICAST)
continue;
-
+
if (next_fi->fib_priority > res->fi->fib_priority)
break;
if (!next_fi->fib_nh[0].nh_gw ||
next_fi->fib_nh[0].nh_scope != RT_SCOPE_LINK)
continue;
fa->fa_state |= FA_S_ACCESSED;
-
+
if (fi == NULL) {
if (next_fi != res->fi)
break;
@@ -1904,7 +1813,7 @@ fn_trie_select_default(struct fib_table *tb, const struct flowi *flp, struct fib
}
trie_last_dflt = last_idx;
out:;
- read_unlock(&fib_lock);
+ rcu_read_unlock();
}
static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, struct fib_table *tb,
@@ -1913,12 +1822,14 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, struct fi
int i, s_i;
struct fib_alias *fa;
- u32 xkey=htonl(key);
+ u32 xkey = htonl(key);
- s_i=cb->args[3];
+ s_i = cb->args[3];
i = 0;
- list_for_each_entry(fa, fah, fa_list) {
+ /* rcu_read_lock is hold by caller */
+
+ list_for_each_entry_rcu(fa, fah, fa_list) {
if (i < s_i) {
i++;
continue;
@@ -1946,10 +1857,10 @@ static int fn_trie_dump_fa(t_key key, int plen, struct list_head *fah, struct fi
fa->fa_info, 0) < 0) {
cb->args[3] = i;
return -1;
- }
+ }
i++;
}
- cb->args[3]=i;
+ cb->args[3] = i;
return skb->len;
}
@@ -1959,10 +1870,10 @@ static int fn_trie_dump_plen(struct trie *t, int plen, struct fib_table *tb, str
int h, s_h;
struct list_head *fa_head;
struct leaf *l = NULL;
- s_h=cb->args[2];
- for (h=0; (l = nextleaf(t, l)) != NULL; h++) {
+ s_h = cb->args[2];
+ for (h = 0; (l = nextleaf(t, l)) != NULL; h++) {
if (h < s_h)
continue;
if (h > s_h)
@@ -1970,7 +1881,7 @@ static int fn_trie_dump_plen(struct trie *t, int plen, struct fib_table *tb, str
sizeof(cb->args) - 3*sizeof(cb->args[0]));
fa_head = get_fa_head(l, plen);
-
+
if (!fa_head)
continue;
@@ -1978,11 +1889,11 @@ static int fn_trie_dump_plen(struct trie *t, int plen, struct fib_table *tb, str
continue;
if (fn_trie_dump_fa(l->key, plen, fa_head, tb, skb, cb)<0) {
- cb->args[2]=h;
+ cb->args[2] = h;
return -1;
}
}
- cb->args[2]=h;
+ cb->args[2] = h;
return skb->len;
}
@@ -1993,25 +1904,24 @@ static int fn_trie_dump(struct fib_table *tb, struct sk_buff *skb, struct netlin
s_m = cb->args[1];
- read_lock(&fib_lock);
- for (m=0; m<=32; m++) {
-
+ rcu_read_lock();
+ for (m = 0; m <= 32; m++) {
if (m < s_m)
continue;
if (m > s_m)
memset(&cb->args[2], 0,
- sizeof(cb->args) - 2*sizeof(cb->args[0]));
+ sizeof(cb->args) - 2*sizeof(cb->args[0]));
if (fn_trie_dump_plen(t, 32-m, tb, skb, cb)<0) {
cb->args[1] = m;
goto out;
}
}
- read_unlock(&fib_lock);
+ rcu_read_unlock();
cb->args[1] = m;
return skb->len;
- out:
- read_unlock(&fib_lock);
+out:
+ rcu_read_unlock();
return -1;
}
@@ -2051,9 +1961,9 @@ struct fib_table * __init fib_hash_init(int id)
trie_init(t);
if (id == RT_TABLE_LOCAL)
- trie_local = t;
+ trie_local = t;
else if (id == RT_TABLE_MAIN)
- trie_main = t;
+ trie_main = t;
if (id == RT_TABLE_LOCAL)
printk("IPv4 FIB: Using LC-trie version %s\n", VERSION);
@@ -2065,7 +1975,8 @@ struct fib_table * __init fib_hash_init(int id)
static void putspace_seq(struct seq_file *seq, int n)
{
- while (n--) seq_printf(seq, " ");
+ while (n--)
+ seq_printf(seq, " ");
}
static void printbin_seq(struct seq_file *seq, unsigned int v, int bits)
@@ -2086,29 +1997,22 @@ static void printnode_seq(struct seq_file *seq, int indent, struct node *n,
seq_printf(seq, "%d/", cindex);
printbin_seq(seq, cindex, bits);
seq_printf(seq, ": ");
- }
- else
+ } else
seq_printf(seq, "<root>: ");
seq_printf(seq, "%s:%p ", IS_LEAF(n)?"Leaf":"Internal node", n);
- if (IS_LEAF(n))
- seq_printf(seq, "key=%d.%d.%d.%d\n",
- n->key >> 24, (n->key >> 16) % 256, (n->key >> 8) % 256, n->key % 256);
- else {
- int plen = ((struct tnode *)n)->pos;
- t_key prf=MASK_PFX(n->key, plen);
- seq_printf(seq, "key=%d.%d.%d.%d/%d\n",
- prf >> 24, (prf >> 16) % 256, (prf >> 8) % 256, prf % 256, plen);
- }
if (IS_LEAF(n)) {
- struct leaf *l=(struct leaf *)n;
+ struct leaf *l = (struct leaf *)n;
struct fib_alias *fa;
int i;
- for (i=32; i>=0; i--)
- if (find_leaf_info(&l->list, i)) {
-
+
+ seq_printf(seq, "key=%d.%d.%d.%d\n",
+ n->key >> 24, (n->key >> 16) % 256, (n->key >> 8) % 256, n->key % 256);
+
+ for (i = 32; i >= 0; i--)
+ if (find_leaf_info(&l->list, i)) {
struct list_head *fa_head = get_fa_head(l, i);
-
+
if (!fa_head)
continue;
@@ -2118,17 +2022,16 @@ static void printnode_seq(struct seq_file *seq, int indent, struct node *n,
putspace_seq(seq, indent+2);
seq_printf(seq, "{/%d...dumping}\n", i);
-
- list_for_each_entry(fa, fa_head, fa_list) {
+ list_for_each_entry_rcu(fa, fa_head, fa_list) {
putspace_seq(seq, indent+2);
- if (fa->fa_info->fib_nh == NULL) {
- seq_printf(seq, "Error _fib_nh=NULL\n");
- continue;
- }
if (fa->fa_info == NULL) {
seq_printf(seq, "Error fa_info=NULL\n");
continue;
}
+ if (fa->fa_info->fib_nh == NULL) {
+ seq_printf(seq, "Error _fib_nh=NULL\n");
+ continue;
+ }
seq_printf(seq, "{type=%d scope=%d TOS=%d}\n",
fa->fa_type,
@@ -2136,11 +2039,16 @@ static void printnode_seq(struct seq_file *seq, int indent, struct node *n,
fa->fa_tos);
}
}
- }
- else if (IS_TNODE(n)) {
+ } else {
struct tnode *tn = (struct tnode *)n;
+ int plen = ((struct tnode *)n)->pos;
+ t_key prf = MASK_PFX(n->key, plen);
+
+ seq_printf(seq, "key=%d.%d.%d.%d/%d\n",
+ prf >> 24, (prf >> 16) % 256, (prf >> 8) % 256, prf % 256, plen);
+
putspace_seq(seq, indent); seq_printf(seq, "| ");
- seq_printf(seq, "{key prefix=%08x/", tn->key&TKEY_GET_MASK(0, tn->pos));
+ seq_printf(seq, "{key prefix=%08x/", tn->key & TKEY_GET_MASK(0, tn->pos));
printbin_seq(seq, tkey_extract_bits(tn->key, 0, tn->pos), tn->pos);
seq_printf(seq, "}\n");
putspace_seq(seq, indent); seq_printf(seq, "| ");
@@ -2154,194 +2062,196 @@ static void printnode_seq(struct seq_file *seq, int indent, struct node *n,
static void trie_dump_seq(struct seq_file *seq, struct trie *t)
{
- struct node *n = t->trie;
- int cindex=0;
- int indent=1;
- int pend=0;
+ struct node *n;
+ int cindex = 0;
+ int indent = 1;
+ int pend = 0;
int depth = 0;
+ struct tnode *tn;
- read_lock(&fib_lock);
-
+ rcu_read_lock();
+ n = rcu_dereference(t->trie);
seq_printf(seq, "------ trie_dump of t=%p ------\n", t);
- if (n) {
- printnode_seq(seq, indent, n, pend, cindex, 0);
- if (IS_TNODE(n)) {
- struct tnode *tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
- putspace_seq(seq, indent); seq_printf(seq, "\\--\n");
- indent += 3;
- depth++;
-
- while (tn && cindex < (1 << tn->bits)) {
- if (tn->child[cindex]) {
-
- /* Got a child */
-
- printnode_seq(seq, indent, tn->child[cindex], pend, cindex, tn->bits);
- if (IS_LEAF(tn->child[cindex])) {
- cindex++;
-
- }
- else {
- /*
- * New tnode. Decend one level
- */
-
- depth++;
- n = tn->child[cindex];
- tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
- putspace_seq(seq, indent); seq_printf(seq, "\\--\n");
- indent+=3;
- cindex=0;
- }
- }
- else
- cindex++;
+ if (!n) {
+ seq_printf(seq, "------ trie is empty\n");
+
+ rcu_read_unlock();
+ return;
+ }
+
+ printnode_seq(seq, indent, n, pend, cindex, 0);
+
+ if (!IS_TNODE(n)) {
+ rcu_read_unlock();
+ return;
+ }
+
+ tn = (struct tnode *)n;
+ pend = tn->pos+tn->bits;
+ putspace_seq(seq, indent); seq_printf(seq, "\\--\n");
+ indent += 3;
+ depth++;
+
+ while (tn && cindex < (1 << tn->bits)) {
+ struct node *child = rcu_dereference(tn->child[cindex]);
+ if (!child)
+ cindex++;
+ else {
+ /* Got a child */
+ printnode_seq(seq, indent, child, pend,
+ cindex, tn->bits);
+
+ if (IS_LEAF(child))
+ cindex++;
+
+ else {
/*
- * Test if we are done
+ * New tnode. Decend one level
*/
-
- while (cindex >= (1 << tn->bits)) {
- /*
- * Move upwards and test for root
- * pop off all traversed nodes
- */
-
- if (NODE_PARENT(tn) == NULL) {
- tn = NULL;
- n = NULL;
- break;
- }
- else {
- cindex = tkey_extract_bits(tn->key, NODE_PARENT(tn)->pos, NODE_PARENT(tn)->bits);
- tn = NODE_PARENT(tn);
- cindex++;
- n = (struct node *)tn;
- pend = tn->pos+tn->bits;
- indent-=3;
- depth--;
- }
- }
+ depth++;
+ n = child;
+ tn = (struct tnode *)n;
+ pend = tn->pos+tn->bits;
+ putspace_seq(seq, indent);
+ seq_printf(seq, "\\--\n");
+ indent += 3;
+ cindex = 0;
}
}
- else n = NULL;
- }
- else seq_printf(seq, "------ trie is empty\n");
- read_unlock(&fib_lock);
+ /*
+ * Test if we are done
+ */
+
+ while (cindex >= (1 << tn->bits)) {
+ /*
+ * Move upwards and test for root
+ * pop off all traversed nodes
+ */
+
+ if (NODE_PARENT(tn) == NULL) {
+ tn = NULL;
+ break;
+ }
+
+ cindex = tkey_extract_bits(tn->key, NODE_PARENT(tn)->pos, NODE_PARENT(tn)->bits);
+ cindex++;
+ tn = NODE_PARENT(tn);
+ pend = tn->pos + tn->bits;
+ indent -= 3;
+ depth--;
+ }
+ }
+ rcu_read_unlock();
}
static struct trie_stat *trie_stat_new(void)
{
- struct trie_stat *s = kmalloc(sizeof(struct trie_stat), GFP_KERNEL);
+ struct trie_stat *s;
int i;
- if (s) {
- s->totdepth = 0;
- s->maxdepth = 0;
- s->tnodes = 0;
- s->leaves = 0;
- s->nullpointers = 0;
-
- for(i=0; i< MAX_CHILDS; i++)
- s->nodesizes[i] = 0;
- }
+ s = kmalloc(sizeof(struct trie_stat), GFP_KERNEL);
+ if (!s)
+ return NULL;
+
+ s->totdepth = 0;
+ s->maxdepth = 0;
+ s->tnodes = 0;
+ s->leaves = 0;
+ s->nullpointers = 0;
+
+ for (i = 0; i < MAX_CHILDS; i++)
+ s->nodesizes[i] = 0;
+
return s;
}
static struct trie_stat *trie_collect_stats(struct trie *t)
{
- struct node *n = t->trie;
+ struct node *n;
struct trie_stat *s = trie_stat_new();
int cindex = 0;
- int indent = 1;
int pend = 0;
int depth = 0;
- read_lock(&fib_lock);
+ if (!s)
+ return NULL;
- if (s) {
- if (n) {
- if (IS_TNODE(n)) {
- struct tnode *tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
- indent += 3;
- s->nodesizes[tn->bits]++;
- depth++;
+ rcu_read_lock();
+ n = rcu_dereference(t->trie);
- while (tn && cindex < (1 << tn->bits)) {
- if (tn->child[cindex]) {
- /* Got a child */
-
- if (IS_LEAF(tn->child[cindex])) {
- cindex++;
-
- /* stats */
- if (depth > s->maxdepth)
- s->maxdepth = depth;
- s->totdepth += depth;
- s->leaves++;
- }
-
- else {
- /*
- * New tnode. Decend one level
- */
-
- s->tnodes++;
- s->nodesizes[tn->bits]++;
- depth++;
-
- n = tn->child[cindex];
- tn = (struct tnode *)n;
- pend = tn->pos+tn->bits;
-
- indent += 3;
- cindex = 0;
- }
- }
- else {
- cindex++;
- s->nullpointers++;
- }
+ if (!n)
+ return s;
+
+ if (IS_TNODE(n)) {
+ struct tnode *tn = (struct tnode *)n;
+ pend = tn->pos+tn->bits;
+ s->nodesizes[tn->bits]++;
+ depth++;
+
+ while (tn && cindex < (1 << tn->bits)) {
+ struct node *ch = rcu_dereference(tn->child[cindex]);
+ if (ch) {
+ /* Got a child */
+
+ if (IS_LEAF(tn->child[cindex])) {
+ cindex++;
+
+ /* stats */
+ if (depth > s->maxdepth)
+ s->maxdepth = depth;
+ s->totdepth += depth;
+ s->leaves++;
+ } else {
/*
- * Test if we are done
+ * New tnode. Decend one level
*/
-
- while (cindex >= (1 << tn->bits)) {
-
- /*
- * Move upwards and test for root
- * pop off all traversed nodes
- */
-
-
- if (NODE_PARENT(tn) == NULL) {
- tn = NULL;
- n = NULL;
- break;
- }
- else {
- cindex = tkey_extract_bits(tn->key, NODE_PARENT(tn)->pos, NODE_PARENT(tn)->bits);
- tn = NODE_PARENT(tn);
- cindex++;
- n = (struct node *)tn;
- pend = tn->pos+tn->bits;
- indent -= 3;
- depth--;
- }
- }
+
+ s->tnodes++;
+ s->nodesizes[tn->bits]++;
+ depth++;
+
+ n = ch;
+ tn = (struct tnode *)n;
+ pend = tn->pos+tn->bits;
+
+ cindex = 0;
}
+ } else {
+ cindex++;
+ s->nullpointers++;
}
- else n = NULL;
+
+ /*
+ * Test if we are done
+ */
+
+ while (cindex >= (1 << tn->bits)) {
+ /*
+ * Move upwards and test for root
+ * pop off all traversed nodes
+ */
+
+ if (NODE_PARENT(tn) == NULL) {
+ tn = NULL;
+ n = NULL;
+ break;
+ }
+
+ cindex = tkey_extract_bits(tn->key, NODE_PARENT(tn)->pos, NODE_PARENT(tn)->bits);
+ tn = NODE_PARENT(tn);
+ cindex++;
+ n = (struct node *)tn;
+ pend = tn->pos+tn->bits;
+ depth--;
+ }
}
}
- read_unlock(&fib_lock);
+ rcu_read_unlock();
return s;
}
@@ -2359,17 +2269,22 @@ static struct fib_alias *fib_triestat_get_next(struct seq_file *seq)
static void *fib_triestat_seq_start(struct seq_file *seq, loff_t *pos)
{
- void *v = NULL;
+ if (!ip_fib_main_table)
+ return NULL;
- if (ip_fib_main_table)
- v = *pos ? fib_triestat_get_next(seq) : SEQ_START_TOKEN;
- return v;
+ if (*pos)
+ return fib_triestat_get_next(seq);
+ else
+ return SEQ_START_TOKEN;
}
static void *fib_triestat_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
- return v == SEQ_START_TOKEN ? fib_triestat_get_first(seq) : fib_triestat_get_next(seq);
+ if (v == SEQ_START_TOKEN)
+ return fib_triestat_get_first(seq);
+ else
+ return fib_triestat_get_next(seq);
}
static void fib_triestat_seq_stop(struct seq_file *seq, void *v)
@@ -2388,22 +2303,22 @@ static void collect_and_show(struct trie *t, struct seq_file *seq)
{
int bytes = 0; /* How many bytes are used, a ref is 4 bytes */
int i, max, pointers;
- struct trie_stat *stat;
+ struct trie_stat *stat;
int avdepth;
stat = trie_collect_stats(t);
- bytes=0;
+ bytes = 0;
seq_printf(seq, "trie=%p\n", t);
if (stat) {
if (stat->leaves)
- avdepth=stat->totdepth*100 / stat->leaves;
+ avdepth = stat->totdepth*100 / stat->leaves;
else
- avdepth=0;
- seq_printf(seq, "Aver depth: %d.%02d\n", avdepth / 100, avdepth % 100 );
+ avdepth = 0;
+ seq_printf(seq, "Aver depth: %d.%02d\n", avdepth / 100, avdepth % 100);
seq_printf(seq, "Max depth: %4d\n", stat->maxdepth);
-
+
seq_printf(seq, "Leaves: %d\n", stat->leaves);
bytes += sizeof(struct leaf) * stat->leaves;
seq_printf(seq, "Internal nodes: %d\n", stat->tnodes);
@@ -2455,11 +2370,9 @@ static int fib_triestat_seq_show(struct seq_file *seq, void *v)
if (trie_main)
collect_and_show(trie_main, seq);
- }
- else {
- snprintf(bf, sizeof(bf),
- "*\t%08X\t%08X", 200, 400);
-
+ } else {
+ snprintf(bf, sizeof(bf), "*\t%08X\t%08X", 200, 400);
+
seq_printf(seq, "%-127s\n", bf);
}
return 0;
@@ -2520,22 +2433,27 @@ static struct fib_alias *fib_trie_get_next(struct seq_file *seq)
static void *fib_trie_seq_start(struct seq_file *seq, loff_t *pos)
{
- void *v = NULL;
+ if (!ip_fib_main_table)
+ return NULL;
- if (ip_fib_main_table)
- v = *pos ? fib_trie_get_next(seq) : SEQ_START_TOKEN;
- return v;
+ if (*pos)
+ return fib_trie_get_next(seq);
+ else
+ return SEQ_START_TOKEN;
}
static void *fib_trie_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
++*pos;
- return v == SEQ_START_TOKEN ? fib_trie_get_first(seq) : fib_trie_get_next(seq);
+ if (v == SEQ_START_TOKEN)
+ return fib_trie_get_first(seq);
+ else
+ return fib_trie_get_next(seq);
+
}
static void fib_trie_seq_stop(struct seq_file *seq, void *v)
{
-
}
/*
@@ -2555,9 +2473,7 @@ static int fib_trie_seq_show(struct seq_file *seq, void *v)
if (trie_main)
trie_dump_seq(seq, trie_main);
- }
-
- else {
+ } else {
snprintf(bf, sizeof(bf),
"*\t%08X\t%08X", 200, 400);
seq_printf(seq, "%-127s\n", bf);
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index badfc5849973..24eb56ae1b5a 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -114,7 +114,7 @@ struct icmp_bxm {
/*
* Statistics
*/
-DEFINE_SNMP_STAT(struct icmp_mib, icmp_statistics);
+DEFINE_SNMP_STAT(struct icmp_mib, icmp_statistics) __read_mostly;
/* An array of errno for error messages from dest unreach. */
/* RFC 1122: 3.2.2.1 States that NET_UNREACH, HOST_UNREACH and SR_FAILED MUST be considered 'transient errs'. */
@@ -627,11 +627,10 @@ static void icmp_unreach(struct sk_buff *skb)
break;
case ICMP_FRAG_NEEDED:
if (ipv4_config.no_pmtu_disc) {
- LIMIT_NETDEBUG(
- printk(KERN_INFO "ICMP: %u.%u.%u.%u: "
+ LIMIT_NETDEBUG(KERN_INFO "ICMP: %u.%u.%u.%u: "
"fragmentation needed "
"and DF set.\n",
- NIPQUAD(iph->daddr)));
+ NIPQUAD(iph->daddr));
} else {
info = ip_rt_frag_needed(iph,
ntohs(icmph->un.frag.mtu));
@@ -640,10 +639,9 @@ static void icmp_unreach(struct sk_buff *skb)
}
break;
case ICMP_SR_FAILED:
- LIMIT_NETDEBUG(
- printk(KERN_INFO "ICMP: %u.%u.%u.%u: Source "
+ LIMIT_NETDEBUG(KERN_INFO "ICMP: %u.%u.%u.%u: Source "
"Route Failed.\n",
- NIPQUAD(iph->daddr)));
+ NIPQUAD(iph->daddr));
break;
default:
break;
@@ -936,7 +934,7 @@ int icmp_rcv(struct sk_buff *skb)
case CHECKSUM_HW:
if (!(u16)csum_fold(skb->csum))
break;
- LIMIT_NETDEBUG(printk(KERN_DEBUG "icmp v4 hw csum failure\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "icmp v4 hw csum failure\n");
case CHECKSUM_NONE:
if ((u16)csum_fold(skb_checksum(skb, 0, skb->len, 0)))
goto error;
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 5088f90835ae..44607f4767b8 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -904,7 +904,7 @@ int igmp_rcv(struct sk_buff *skb)
case IGMP_MTRACE_RESP:
break;
default:
- NETDEBUG(printk(KERN_DEBUG "New IGMP type=%d, why we do not know about it?\n", ih->type));
+ NETDEBUG(KERN_DEBUG "New IGMP type=%d, why we do not know about it?\n", ih->type);
}
in_dev_put(in_dev);
kfree_skb(skb);
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
new file mode 100644
index 000000000000..fe3c6d3d0c91
--- /dev/null
+++ b/net/ipv4/inet_connection_sock.c
@@ -0,0 +1,641 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Support for INET connection oriented protocols.
+ *
+ * Authors: See the TCP sources
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or(at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/jhash.h>
+
+#include <net/inet_connection_sock.h>
+#include <net/inet_hashtables.h>
+#include <net/inet_timewait_sock.h>
+#include <net/ip.h>
+#include <net/route.h>
+#include <net/tcp_states.h>
+#include <net/xfrm.h>
+
+#ifdef INET_CSK_DEBUG
+const char inet_csk_timer_bug_msg[] = "inet_csk BUG: unknown timer value\n";
+EXPORT_SYMBOL(inet_csk_timer_bug_msg);
+#endif
+
+/*
+ * This array holds the first and last local port number.
+ * For high-usage systems, use sysctl to change this to
+ * 32768-61000
+ */
+int sysctl_local_port_range[2] = { 1024, 4999 };
+
+static inline int inet_csk_bind_conflict(struct sock *sk, struct inet_bind_bucket *tb)
+{
+ const u32 sk_rcv_saddr = inet_rcv_saddr(sk);
+ struct sock *sk2;
+ struct hlist_node *node;
+ int reuse = sk->sk_reuse;
+
+ sk_for_each_bound(sk2, node, &tb->owners) {
+ if (sk != sk2 &&
+ !inet_v6_ipv6only(sk2) &&
+ (!sk->sk_bound_dev_if ||
+ !sk2->sk_bound_dev_if ||
+ sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
+ if (!reuse || !sk2->sk_reuse ||
+ sk2->sk_state == TCP_LISTEN) {
+ const u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
+ if (!sk2_rcv_saddr || !sk_rcv_saddr ||
+ sk2_rcv_saddr == sk_rcv_saddr)
+ break;
+ }
+ }
+ }
+ return node != NULL;
+}
+
+/* Obtain a reference to a local port for the given sock,
+ * if snum is zero it means select any available local port.
+ */
+int inet_csk_get_port(struct inet_hashinfo *hashinfo,
+ struct sock *sk, unsigned short snum)
+{
+ struct inet_bind_hashbucket *head;
+ struct hlist_node *node;
+ struct inet_bind_bucket *tb;
+ int ret;
+
+ local_bh_disable();
+ if (!snum) {
+ int low = sysctl_local_port_range[0];
+ int high = sysctl_local_port_range[1];
+ int remaining = (high - low) + 1;
+ int rover;
+
+ spin_lock(&hashinfo->portalloc_lock);
+ if (hashinfo->port_rover < low)
+ rover = low;
+ else
+ rover = hashinfo->port_rover;
+ do {
+ rover++;
+ if (rover > high)
+ rover = low;
+ head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)];
+ spin_lock(&head->lock);
+ inet_bind_bucket_for_each(tb, node, &head->chain)
+ if (tb->port == rover)
+ goto next;
+ break;
+ next:
+ spin_unlock(&head->lock);
+ } while (--remaining > 0);
+ hashinfo->port_rover = rover;
+ spin_unlock(&hashinfo->portalloc_lock);
+
+ /* Exhausted local port range during search? It is not
+ * possible for us to be holding one of the bind hash
+ * locks if this test triggers, because if 'remaining'
+ * drops to zero, we broke out of the do/while loop at
+ * the top level, not from the 'break;' statement.
+ */
+ ret = 1;
+ if (remaining <= 0)
+ goto fail;
+
+ /* OK, here is the one we will use. HEAD is
+ * non-NULL and we hold it's mutex.
+ */
+ snum = rover;
+ } else {
+ head = &hashinfo->bhash[inet_bhashfn(snum, hashinfo->bhash_size)];
+ spin_lock(&head->lock);
+ inet_bind_bucket_for_each(tb, node, &head->chain)
+ if (tb->port == snum)
+ goto tb_found;
+ }
+ tb = NULL;
+ goto tb_not_found;
+tb_found:
+ if (!hlist_empty(&tb->owners)) {
+ if (sk->sk_reuse > 1)
+ goto success;
+ if (tb->fastreuse > 0 &&
+ sk->sk_reuse && sk->sk_state != TCP_LISTEN) {
+ goto success;
+ } else {
+ ret = 1;
+ if (inet_csk_bind_conflict(sk, tb))
+ goto fail_unlock;
+ }
+ }
+tb_not_found:
+ ret = 1;
+ if (!tb && (tb = inet_bind_bucket_create(hashinfo->bind_bucket_cachep, head, snum)) == NULL)
+ goto fail_unlock;
+ if (hlist_empty(&tb->owners)) {
+ if (sk->sk_reuse && sk->sk_state != TCP_LISTEN)
+ tb->fastreuse = 1;
+ else
+ tb->fastreuse = 0;
+ } else if (tb->fastreuse &&
+ (!sk->sk_reuse || sk->sk_state == TCP_LISTEN))
+ tb->fastreuse = 0;
+success:
+ if (!inet_csk(sk)->icsk_bind_hash)
+ inet_bind_hash(sk, tb, snum);
+ BUG_TRAP(inet_csk(sk)->icsk_bind_hash == tb);
+ ret = 0;
+
+fail_unlock:
+ spin_unlock(&head->lock);
+fail:
+ local_bh_enable();
+ return ret;
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_get_port);
+
+/*
+ * Wait for an incoming connection, avoid race conditions. This must be called
+ * with the socket locked.
+ */
+static int inet_csk_wait_for_connect(struct sock *sk, long timeo)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ DEFINE_WAIT(wait);
+ int err;
+
+ /*
+ * True wake-one mechanism for incoming connections: only
+ * one process gets woken up, not the 'whole herd'.
+ * Since we do not 'race & poll' for established sockets
+ * anymore, the common case will execute the loop only once.
+ *
+ * Subtle issue: "add_wait_queue_exclusive()" will be added
+ * after any current non-exclusive waiters, and we know that
+ * it will always _stay_ after any new non-exclusive waiters
+ * because all non-exclusive waiters are added at the
+ * beginning of the wait-queue. As such, it's ok to "drop"
+ * our exclusiveness temporarily when we get woken up without
+ * having to remove and re-insert us on the wait queue.
+ */
+ for (;;) {
+ prepare_to_wait_exclusive(sk->sk_sleep, &wait,
+ TASK_INTERRUPTIBLE);
+ release_sock(sk);
+ if (reqsk_queue_empty(&icsk->icsk_accept_queue))
+ timeo = schedule_timeout(timeo);
+ lock_sock(sk);
+ err = 0;
+ if (!reqsk_queue_empty(&icsk->icsk_accept_queue))
+ break;
+ err = -EINVAL;
+ if (sk->sk_state != TCP_LISTEN)
+ break;
+ err = sock_intr_errno(timeo);
+ if (signal_pending(current))
+ break;
+ err = -EAGAIN;
+ if (!timeo)
+ break;
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ return err;
+}
+
+/*
+ * This will accept the next outstanding connection.
+ */
+struct sock *inet_csk_accept(struct sock *sk, int flags, int *err)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct sock *newsk;
+ int error;
+
+ lock_sock(sk);
+
+ /* We need to make sure that this socket is listening,
+ * and that it has something pending.
+ */
+ error = -EINVAL;
+ if (sk->sk_state != TCP_LISTEN)
+ goto out_err;
+
+ /* Find already established connection */
+ if (reqsk_queue_empty(&icsk->icsk_accept_queue)) {
+ long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
+
+ /* If this is a non blocking socket don't sleep */
+ error = -EAGAIN;
+ if (!timeo)
+ goto out_err;
+
+ error = inet_csk_wait_for_connect(sk, timeo);
+ if (error)
+ goto out_err;
+ }
+
+ newsk = reqsk_queue_get_child(&icsk->icsk_accept_queue, sk);
+ BUG_TRAP(newsk->sk_state != TCP_SYN_RECV);
+out:
+ release_sock(sk);
+ return newsk;
+out_err:
+ newsk = NULL;
+ *err = error;
+ goto out;
+}
+
+EXPORT_SYMBOL(inet_csk_accept);
+
+/*
+ * Using different timers for retransmit, delayed acks and probes
+ * We may wish use just one timer maintaining a list of expire jiffies
+ * to optimize.
+ */
+void inet_csk_init_xmit_timers(struct sock *sk,
+ void (*retransmit_handler)(unsigned long),
+ void (*delack_handler)(unsigned long),
+ void (*keepalive_handler)(unsigned long))
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ init_timer(&icsk->icsk_retransmit_timer);
+ init_timer(&icsk->icsk_delack_timer);
+ init_timer(&sk->sk_timer);
+
+ icsk->icsk_retransmit_timer.function = retransmit_handler;
+ icsk->icsk_delack_timer.function = delack_handler;
+ sk->sk_timer.function = keepalive_handler;
+
+ icsk->icsk_retransmit_timer.data =
+ icsk->icsk_delack_timer.data =
+ sk->sk_timer.data = (unsigned long)sk;
+
+ icsk->icsk_pending = icsk->icsk_ack.pending = 0;
+}
+
+EXPORT_SYMBOL(inet_csk_init_xmit_timers);
+
+void inet_csk_clear_xmit_timers(struct sock *sk)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ icsk->icsk_pending = icsk->icsk_ack.pending = icsk->icsk_ack.blocked = 0;
+
+ sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
+ sk_stop_timer(sk, &icsk->icsk_delack_timer);
+ sk_stop_timer(sk, &sk->sk_timer);
+}
+
+EXPORT_SYMBOL(inet_csk_clear_xmit_timers);
+
+void inet_csk_delete_keepalive_timer(struct sock *sk)
+{
+ sk_stop_timer(sk, &sk->sk_timer);
+}
+
+EXPORT_SYMBOL(inet_csk_delete_keepalive_timer);
+
+void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long len)
+{
+ sk_reset_timer(sk, &sk->sk_timer, jiffies + len);
+}
+
+EXPORT_SYMBOL(inet_csk_reset_keepalive_timer);
+
+struct dst_entry* inet_csk_route_req(struct sock *sk,
+ const struct request_sock *req)
+{
+ struct rtable *rt;
+ const struct inet_request_sock *ireq = inet_rsk(req);
+ struct ip_options *opt = inet_rsk(req)->opt;
+ struct flowi fl = { .oif = sk->sk_bound_dev_if,
+ .nl_u = { .ip4_u =
+ { .daddr = ((opt && opt->srr) ?
+ opt->faddr :
+ ireq->rmt_addr),
+ .saddr = ireq->loc_addr,
+ .tos = RT_CONN_FLAGS(sk) } },
+ .proto = sk->sk_protocol,
+ .uli_u = { .ports =
+ { .sport = inet_sk(sk)->sport,
+ .dport = ireq->rmt_port } } };
+
+ if (ip_route_output_flow(&rt, &fl, sk, 0)) {
+ IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ return NULL;
+ }
+ if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway) {
+ ip_rt_put(rt);
+ IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ return NULL;
+ }
+ return &rt->u.dst;
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_route_req);
+
+static inline u32 inet_synq_hash(const u32 raddr, const u16 rport,
+ const u32 rnd, const u16 synq_hsize)
+{
+ return jhash_2words(raddr, (u32)rport, rnd) & (synq_hsize - 1);
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#define AF_INET_FAMILY(fam) ((fam) == AF_INET)
+#else
+#define AF_INET_FAMILY(fam) 1
+#endif
+
+struct request_sock *inet_csk_search_req(const struct sock *sk,
+ struct request_sock ***prevp,
+ const __u16 rport, const __u32 raddr,
+ const __u32 laddr)
+{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
+ struct request_sock *req, **prev;
+
+ for (prev = &lopt->syn_table[inet_synq_hash(raddr, rport, lopt->hash_rnd,
+ lopt->nr_table_entries)];
+ (req = *prev) != NULL;
+ prev = &req->dl_next) {
+ const struct inet_request_sock *ireq = inet_rsk(req);
+
+ if (ireq->rmt_port == rport &&
+ ireq->rmt_addr == raddr &&
+ ireq->loc_addr == laddr &&
+ AF_INET_FAMILY(req->rsk_ops->family)) {
+ BUG_TRAP(!req->sk);
+ *prevp = prev;
+ break;
+ }
+ }
+
+ return req;
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_search_req);
+
+void inet_csk_reqsk_queue_hash_add(struct sock *sk, struct request_sock *req,
+ const unsigned timeout)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
+ const u32 h = inet_synq_hash(inet_rsk(req)->rmt_addr, inet_rsk(req)->rmt_port,
+ lopt->hash_rnd, lopt->nr_table_entries);
+
+ reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, timeout);
+ inet_csk_reqsk_queue_added(sk, timeout);
+}
+
+/* Only thing we need from tcp.h */
+extern int sysctl_tcp_synack_retries;
+
+EXPORT_SYMBOL_GPL(inet_csk_reqsk_queue_hash_add);
+
+void inet_csk_reqsk_queue_prune(struct sock *parent,
+ const unsigned long interval,
+ const unsigned long timeout,
+ const unsigned long max_rto)
+{
+ struct inet_connection_sock *icsk = inet_csk(parent);
+ struct request_sock_queue *queue = &icsk->icsk_accept_queue;
+ struct listen_sock *lopt = queue->listen_opt;
+ int max_retries = icsk->icsk_syn_retries ? : sysctl_tcp_synack_retries;
+ int thresh = max_retries;
+ unsigned long now = jiffies;
+ struct request_sock **reqp, *req;
+ int i, budget;
+
+ if (lopt == NULL || lopt->qlen == 0)
+ return;
+
+ /* Normally all the openreqs are young and become mature
+ * (i.e. converted to established socket) for first timeout.
+ * If synack was not acknowledged for 3 seconds, it means
+ * one of the following things: synack was lost, ack was lost,
+ * rtt is high or nobody planned to ack (i.e. synflood).
+ * When server is a bit loaded, queue is populated with old
+ * open requests, reducing effective size of queue.
+ * When server is well loaded, queue size reduces to zero
+ * after several minutes of work. It is not synflood,
+ * it is normal operation. The solution is pruning
+ * too old entries overriding normal timeout, when
+ * situation becomes dangerous.
+ *
+ * Essentially, we reserve half of room for young
+ * embrions; and abort old ones without pity, if old
+ * ones are about to clog our table.
+ */
+ if (lopt->qlen>>(lopt->max_qlen_log-1)) {
+ int young = (lopt->qlen_young<<1);
+
+ while (thresh > 2) {
+ if (lopt->qlen < young)
+ break;
+ thresh--;
+ young <<= 1;
+ }
+ }
+
+ if (queue->rskq_defer_accept)
+ max_retries = queue->rskq_defer_accept;
+
+ budget = 2 * (lopt->nr_table_entries / (timeout / interval));
+ i = lopt->clock_hand;
+
+ do {
+ reqp=&lopt->syn_table[i];
+ while ((req = *reqp) != NULL) {
+ if (time_after_eq(now, req->expires)) {
+ if ((req->retrans < thresh ||
+ (inet_rsk(req)->acked && req->retrans < max_retries))
+ && !req->rsk_ops->rtx_syn_ack(parent, req, NULL)) {
+ unsigned long timeo;
+
+ if (req->retrans++ == 0)
+ lopt->qlen_young--;
+ timeo = min((timeout << req->retrans), max_rto);
+ req->expires = now + timeo;
+ reqp = &req->dl_next;
+ continue;
+ }
+
+ /* Drop this request */
+ inet_csk_reqsk_queue_unlink(parent, req, reqp);
+ reqsk_queue_removed(queue, req);
+ reqsk_free(req);
+ continue;
+ }
+ reqp = &req->dl_next;
+ }
+
+ i = (i + 1) & (lopt->nr_table_entries - 1);
+
+ } while (--budget > 0);
+
+ lopt->clock_hand = i;
+
+ if (lopt->qlen)
+ inet_csk_reset_keepalive_timer(parent, interval);
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_reqsk_queue_prune);
+
+struct sock *inet_csk_clone(struct sock *sk, const struct request_sock *req,
+ const unsigned int __nocast priority)
+{
+ struct sock *newsk = sk_clone(sk, priority);
+
+ if (newsk != NULL) {
+ struct inet_connection_sock *newicsk = inet_csk(newsk);
+
+ newsk->sk_state = TCP_SYN_RECV;
+ newicsk->icsk_bind_hash = NULL;
+
+ inet_sk(newsk)->dport = inet_rsk(req)->rmt_port;
+ newsk->sk_write_space = sk_stream_write_space;
+
+ newicsk->icsk_retransmits = 0;
+ newicsk->icsk_backoff = 0;
+ newicsk->icsk_probes_out = 0;
+
+ /* Deinitialize accept_queue to trap illegal accesses. */
+ memset(&newicsk->icsk_accept_queue, 0, sizeof(newicsk->icsk_accept_queue));
+ }
+ return newsk;
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_clone);
+
+/*
+ * At this point, there should be no process reference to this
+ * socket, and thus no user references at all. Therefore we
+ * can assume the socket waitqueue is inactive and nobody will
+ * try to jump onto it.
+ */
+void inet_csk_destroy_sock(struct sock *sk)
+{
+ BUG_TRAP(sk->sk_state == TCP_CLOSE);
+ BUG_TRAP(sock_flag(sk, SOCK_DEAD));
+
+ /* It cannot be in hash table! */
+ BUG_TRAP(sk_unhashed(sk));
+
+ /* If it has not 0 inet_sk(sk)->num, it must be bound */
+ BUG_TRAP(!inet_sk(sk)->num || inet_csk(sk)->icsk_bind_hash);
+
+ sk->sk_prot->destroy(sk);
+
+ sk_stream_kill_queues(sk);
+
+ xfrm_sk_free_policy(sk);
+
+ sk_refcnt_debug_release(sk);
+
+ atomic_dec(sk->sk_prot->orphan_count);
+ sock_put(sk);
+}
+
+EXPORT_SYMBOL(inet_csk_destroy_sock);
+
+int inet_csk_listen_start(struct sock *sk, const int nr_table_entries)
+{
+ struct inet_sock *inet = inet_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ int rc = reqsk_queue_alloc(&icsk->icsk_accept_queue, nr_table_entries);
+
+ if (rc != 0)
+ return rc;
+
+ sk->sk_max_ack_backlog = 0;
+ sk->sk_ack_backlog = 0;
+ inet_csk_delack_init(sk);
+
+ /* There is race window here: we announce ourselves listening,
+ * but this transition is still not validated by get_port().
+ * It is OK, because this socket enters to hash table only
+ * after validation is complete.
+ */
+ sk->sk_state = TCP_LISTEN;
+ if (!sk->sk_prot->get_port(sk, inet->num)) {
+ inet->sport = htons(inet->num);
+
+ sk_dst_reset(sk);
+ sk->sk_prot->hash(sk);
+
+ return 0;
+ }
+
+ sk->sk_state = TCP_CLOSE;
+ __reqsk_queue_destroy(&icsk->icsk_accept_queue);
+ return -EADDRINUSE;
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_listen_start);
+
+/*
+ * This routine closes sockets which have been at least partially
+ * opened, but not yet accepted.
+ */
+void inet_csk_listen_stop(struct sock *sk)
+{
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct request_sock *acc_req;
+ struct request_sock *req;
+
+ inet_csk_delete_keepalive_timer(sk);
+
+ /* make all the listen_opt local to us */
+ acc_req = reqsk_queue_yank_acceptq(&icsk->icsk_accept_queue);
+
+ /* Following specs, it would be better either to send FIN
+ * (and enter FIN-WAIT-1, it is normal close)
+ * or to send active reset (abort).
+ * Certainly, it is pretty dangerous while synflood, but it is
+ * bad justification for our negligence 8)
+ * To be honest, we are not able to make either
+ * of the variants now. --ANK
+ */
+ reqsk_queue_destroy(&icsk->icsk_accept_queue);
+
+ while ((req = acc_req) != NULL) {
+ struct sock *child = req->sk;
+
+ acc_req = req->dl_next;
+
+ local_bh_disable();
+ bh_lock_sock(child);
+ BUG_TRAP(!sock_owned_by_user(child));
+ sock_hold(child);
+
+ sk->sk_prot->disconnect(child, O_NONBLOCK);
+
+ sock_orphan(child);
+
+ atomic_inc(sk->sk_prot->orphan_count);
+
+ inet_csk_destroy_sock(child);
+
+ bh_unlock_sock(child);
+ local_bh_enable();
+ sock_put(child);
+
+ sk_acceptq_removed(sk);
+ __reqsk_free(req);
+ }
+ BUG_TRAP(!sk->sk_ack_backlog);
+}
+
+EXPORT_SYMBOL_GPL(inet_csk_listen_stop);
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
new file mode 100644
index 000000000000..71f3c7350c6e
--- /dev/null
+++ b/net/ipv4/inet_diag.c
@@ -0,0 +1,868 @@
+/*
+ * inet_diag.c Module for monitoring INET transport protocols sockets.
+ *
+ * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/random.h>
+#include <linux/cache.h>
+#include <linux/init.h>
+#include <linux/time.h>
+
+#include <net/icmp.h>
+#include <net/tcp.h>
+#include <net/ipv6.h>
+#include <net/inet_common.h>
+#include <net/inet_connection_sock.h>
+#include <net/inet_hashtables.h>
+#include <net/inet_timewait_sock.h>
+#include <net/inet6_hashtables.h>
+
+#include <linux/inet.h>
+#include <linux/stddef.h>
+
+#include <linux/inet_diag.h>
+
+static const struct inet_diag_handler **inet_diag_table;
+
+struct inet_diag_entry {
+ u32 *saddr;
+ u32 *daddr;
+ u16 sport;
+ u16 dport;
+ u16 family;
+ u16 userlocks;
+};
+
+static struct sock *idiagnl;
+
+#define INET_DIAG_PUT(skb, attrtype, attrlen) \
+ RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
+
+static int inet_diag_fill(struct sk_buff *skb, struct sock *sk,
+ int ext, u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh)
+{
+ const struct inet_sock *inet = inet_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct inet_diag_msg *r;
+ struct nlmsghdr *nlh;
+ void *info = NULL;
+ struct inet_diag_meminfo *minfo = NULL;
+ unsigned char *b = skb->tail;
+ const struct inet_diag_handler *handler;
+
+ handler = inet_diag_table[unlh->nlmsg_type];
+ BUG_ON(handler == NULL);
+
+ nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
+ nlh->nlmsg_flags = nlmsg_flags;
+
+ r = NLMSG_DATA(nlh);
+ if (sk->sk_state != TCP_TIME_WAIT) {
+ if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
+ minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO,
+ sizeof(*minfo));
+ if (ext & (1 << (INET_DIAG_INFO - 1)))
+ info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
+ handler->idiag_info_size);
+
+ if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
+ size_t len = strlen(icsk->icsk_ca_ops->name);
+ strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
+ icsk->icsk_ca_ops->name);
+ }
+ }
+ r->idiag_family = sk->sk_family;
+ r->idiag_state = sk->sk_state;
+ r->idiag_timer = 0;
+ r->idiag_retrans = 0;
+
+ r->id.idiag_if = sk->sk_bound_dev_if;
+ r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
+ r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
+
+ if (r->idiag_state == TCP_TIME_WAIT) {
+ const struct inet_timewait_sock *tw = inet_twsk(sk);
+ long tmo = tw->tw_ttd - jiffies;
+ if (tmo < 0)
+ tmo = 0;
+
+ r->id.idiag_sport = tw->tw_sport;
+ r->id.idiag_dport = tw->tw_dport;
+ r->id.idiag_src[0] = tw->tw_rcv_saddr;
+ r->id.idiag_dst[0] = tw->tw_daddr;
+ r->idiag_state = tw->tw_substate;
+ r->idiag_timer = 3;
+ r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ;
+ r->idiag_rqueue = 0;
+ r->idiag_wqueue = 0;
+ r->idiag_uid = 0;
+ r->idiag_inode = 0;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (r->idiag_family == AF_INET6) {
+ const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk);
+
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
+ &tcp6tw->tw_v6_rcv_saddr);
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
+ &tcp6tw->tw_v6_daddr);
+ }
+#endif
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+ }
+
+ r->id.idiag_sport = inet->sport;
+ r->id.idiag_dport = inet->dport;
+ r->id.idiag_src[0] = inet->rcv_saddr;
+ r->id.idiag_dst[0] = inet->daddr;
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (r->idiag_family == AF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
+ &np->rcv_saddr);
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
+ &np->daddr);
+ }
+#endif
+
+#define EXPIRES_IN_MS(tmo) ((tmo - jiffies) * 1000 + HZ - 1) / HZ
+
+ if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
+ r->idiag_timer = 1;
+ r->idiag_retrans = icsk->icsk_retransmits;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
+ r->idiag_timer = 4;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (timer_pending(&sk->sk_timer)) {
+ r->idiag_timer = 2;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
+ } else {
+ r->idiag_timer = 0;
+ r->idiag_expires = 0;
+ }
+#undef EXPIRES_IN_MS
+
+ r->idiag_uid = sock_i_uid(sk);
+ r->idiag_inode = sock_i_ino(sk);
+
+ if (minfo) {
+ minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
+ minfo->idiag_wmem = sk->sk_wmem_queued;
+ minfo->idiag_fmem = sk->sk_forward_alloc;
+ minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
+ }
+
+ handler->idiag_get_info(sk, r, info);
+
+ if (sk->sk_state < TCP_TIME_WAIT &&
+ icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
+ icsk->icsk_ca_ops->get_info(sk, ext, skb);
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+rtattr_failure:
+nlmsg_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet_diag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
+{
+ int err;
+ struct sock *sk;
+ struct inet_diag_req *req = NLMSG_DATA(nlh);
+ struct sk_buff *rep;
+ struct inet_hashinfo *hashinfo;
+ const struct inet_diag_handler *handler;
+
+ handler = inet_diag_table[nlh->nlmsg_type];
+ BUG_ON(handler == NULL);
+ hashinfo = handler->idiag_hashinfo;
+
+ if (req->idiag_family == AF_INET) {
+ sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
+ req->id.idiag_dport, req->id.idiag_src[0],
+ req->id.idiag_sport, req->id.idiag_if);
+ }
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ else if (req->idiag_family == AF_INET6) {
+ sk = inet6_lookup(hashinfo,
+ (struct in6_addr *)req->id.idiag_dst,
+ req->id.idiag_dport,
+ (struct in6_addr *)req->id.idiag_src,
+ req->id.idiag_sport,
+ req->id.idiag_if);
+ }
+#endif
+ else {
+ return -EINVAL;
+ }
+
+ if (sk == NULL)
+ return -ENOENT;
+
+ err = -ESTALE;
+ if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
+ req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
+ ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
+ (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
+ goto out;
+
+ err = -ENOMEM;
+ rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
+ sizeof(struct inet_diag_meminfo) +
+ handler->idiag_info_size + 64)),
+ GFP_KERNEL);
+ if (!rep)
+ goto out;
+
+ if (inet_diag_fill(rep, sk, req->idiag_ext,
+ NETLINK_CB(in_skb).pid,
+ nlh->nlmsg_seq, 0, nlh) <= 0)
+ BUG();
+
+ err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
+ MSG_DONTWAIT);
+ if (err > 0)
+ err = 0;
+
+out:
+ if (sk) {
+ if (sk->sk_state == TCP_TIME_WAIT)
+ inet_twsk_put((struct inet_timewait_sock *)sk);
+ else
+ sock_put(sk);
+ }
+ return err;
+}
+
+static int bitstring_match(const u32 *a1, const u32 *a2, int bits)
+{
+ int words = bits >> 5;
+
+ bits &= 0x1f;
+
+ if (words) {
+ if (memcmp(a1, a2, words << 2))
+ return 0;
+ }
+ if (bits) {
+ __u32 w1, w2;
+ __u32 mask;
+
+ w1 = a1[words];
+ w2 = a2[words];
+
+ mask = htonl((0xffffffff) << (32 - bits));
+
+ if ((w1 ^ w2) & mask)
+ return 0;
+ }
+
+ return 1;
+}
+
+
+static int inet_diag_bc_run(const void *bc, int len,
+ const struct inet_diag_entry *entry)
+{
+ while (len > 0) {
+ int yes = 1;
+ const struct inet_diag_bc_op *op = bc;
+
+ switch (op->code) {
+ case INET_DIAG_BC_NOP:
+ break;
+ case INET_DIAG_BC_JMP:
+ yes = 0;
+ break;
+ case INET_DIAG_BC_S_GE:
+ yes = entry->sport >= op[1].no;
+ break;
+ case INET_DIAG_BC_S_LE:
+ yes = entry->dport <= op[1].no;
+ break;
+ case INET_DIAG_BC_D_GE:
+ yes = entry->dport >= op[1].no;
+ break;
+ case INET_DIAG_BC_D_LE:
+ yes = entry->dport <= op[1].no;
+ break;
+ case INET_DIAG_BC_AUTO:
+ yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
+ break;
+ case INET_DIAG_BC_S_COND:
+ case INET_DIAG_BC_D_COND: {
+ struct inet_diag_hostcond *cond;
+ u32 *addr;
+
+ cond = (struct inet_diag_hostcond *)(op + 1);
+ if (cond->port != -1 &&
+ cond->port != (op->code == INET_DIAG_BC_S_COND ?
+ entry->sport : entry->dport)) {
+ yes = 0;
+ break;
+ }
+
+ if (cond->prefix_len == 0)
+ break;
+
+ if (op->code == INET_DIAG_BC_S_COND)
+ addr = entry->saddr;
+ else
+ addr = entry->daddr;
+
+ if (bitstring_match(addr, cond->addr, cond->prefix_len))
+ break;
+ if (entry->family == AF_INET6 &&
+ cond->family == AF_INET) {
+ if (addr[0] == 0 && addr[1] == 0 &&
+ addr[2] == htonl(0xffff) &&
+ bitstring_match(addr + 3, cond->addr,
+ cond->prefix_len))
+ break;
+ }
+ yes = 0;
+ break;
+ }
+ }
+
+ if (yes) {
+ len -= op->yes;
+ bc += op->yes;
+ } else {
+ len -= op->no;
+ bc += op->no;
+ }
+ }
+ return (len == 0);
+}
+
+static int valid_cc(const void *bc, int len, int cc)
+{
+ while (len >= 0) {
+ const struct inet_diag_bc_op *op = bc;
+
+ if (cc > len)
+ return 0;
+ if (cc == len)
+ return 1;
+ if (op->yes < 4)
+ return 0;
+ len -= op->yes;
+ bc += op->yes;
+ }
+ return 0;
+}
+
+static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
+{
+ const unsigned char *bc = bytecode;
+ int len = bytecode_len;
+
+ while (len > 0) {
+ struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
+
+//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
+ switch (op->code) {
+ case INET_DIAG_BC_AUTO:
+ case INET_DIAG_BC_S_COND:
+ case INET_DIAG_BC_D_COND:
+ case INET_DIAG_BC_S_GE:
+ case INET_DIAG_BC_S_LE:
+ case INET_DIAG_BC_D_GE:
+ case INET_DIAG_BC_D_LE:
+ if (op->yes < 4 || op->yes > len + 4)
+ return -EINVAL;
+ case INET_DIAG_BC_JMP:
+ if (op->no < 4 || op->no > len + 4)
+ return -EINVAL;
+ if (op->no < len &&
+ !valid_cc(bytecode, bytecode_len, len - op->no))
+ return -EINVAL;
+ break;
+ case INET_DIAG_BC_NOP:
+ if (op->yes < 4 || op->yes > len + 4)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ bc += op->yes;
+ len -= op->yes;
+ }
+ return len == 0 ? 0 : -EINVAL;
+}
+
+static int inet_diag_dump_sock(struct sk_buff *skb, struct sock *sk,
+ struct netlink_callback *cb)
+{
+ struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
+
+ if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
+ struct inet_diag_entry entry;
+ struct rtattr *bc = (struct rtattr *)(r + 1);
+ struct inet_sock *inet = inet_sk(sk);
+
+ entry.family = sk->sk_family;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (entry.family == AF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ entry.saddr = np->rcv_saddr.s6_addr32;
+ entry.daddr = np->daddr.s6_addr32;
+ } else
+#endif
+ {
+ entry.saddr = &inet->rcv_saddr;
+ entry.daddr = &inet->daddr;
+ }
+ entry.sport = inet->num;
+ entry.dport = ntohs(inet->dport);
+ entry.userlocks = sk->sk_userlocks;
+
+ if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
+ return 0;
+ }
+
+ return inet_diag_fill(skb, sk, r->idiag_ext, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
+}
+
+static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
+ struct request_sock *req,
+ u32 pid, u32 seq,
+ const struct nlmsghdr *unlh)
+{
+ const struct inet_request_sock *ireq = inet_rsk(req);
+ struct inet_sock *inet = inet_sk(sk);
+ unsigned char *b = skb->tail;
+ struct inet_diag_msg *r;
+ struct nlmsghdr *nlh;
+ long tmo;
+
+ nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
+ nlh->nlmsg_flags = NLM_F_MULTI;
+ r = NLMSG_DATA(nlh);
+
+ r->idiag_family = sk->sk_family;
+ r->idiag_state = TCP_SYN_RECV;
+ r->idiag_timer = 1;
+ r->idiag_retrans = req->retrans;
+
+ r->id.idiag_if = sk->sk_bound_dev_if;
+ r->id.idiag_cookie[0] = (u32)(unsigned long)req;
+ r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
+
+ tmo = req->expires - jiffies;
+ if (tmo < 0)
+ tmo = 0;
+
+ r->id.idiag_sport = inet->sport;
+ r->id.idiag_dport = ireq->rmt_port;
+ r->id.idiag_src[0] = ireq->loc_addr;
+ r->id.idiag_dst[0] = ireq->rmt_addr;
+ r->idiag_expires = jiffies_to_msecs(tmo);
+ r->idiag_rqueue = 0;
+ r->idiag_wqueue = 0;
+ r->idiag_uid = sock_i_uid(sk);
+ r->idiag_inode = 0;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (r->idiag_family == AF_INET6) {
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
+ &tcp6_rsk(req)->loc_addr);
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
+ &tcp6_rsk(req)->rmt_addr);
+ }
+#endif
+ nlh->nlmsg_len = skb->tail - b;
+
+ return skb->len;
+
+nlmsg_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
+ struct netlink_callback *cb)
+{
+ struct inet_diag_entry entry;
+ struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt;
+ struct rtattr *bc = NULL;
+ struct inet_sock *inet = inet_sk(sk);
+ int j, s_j;
+ int reqnum, s_reqnum;
+ int err = 0;
+
+ s_j = cb->args[3];
+ s_reqnum = cb->args[4];
+
+ if (s_j > 0)
+ s_j--;
+
+ entry.family = sk->sk_family;
+
+ read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
+
+ lopt = icsk->icsk_accept_queue.listen_opt;
+ if (!lopt || !lopt->qlen)
+ goto out;
+
+ if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
+ bc = (struct rtattr *)(r + 1);
+ entry.sport = inet->num;
+ entry.userlocks = sk->sk_userlocks;
+ }
+
+ for (j = s_j; j < lopt->nr_table_entries; j++) {
+ struct request_sock *req, *head = lopt->syn_table[j];
+
+ reqnum = 0;
+ for (req = head; req; reqnum++, req = req->dl_next) {
+ struct inet_request_sock *ireq = inet_rsk(req);
+
+ if (reqnum < s_reqnum)
+ continue;
+ if (r->id.idiag_dport != ireq->rmt_port &&
+ r->id.idiag_dport)
+ continue;
+
+ if (bc) {
+ entry.saddr =
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ (entry.family == AF_INET6) ?
+ tcp6_rsk(req)->loc_addr.s6_addr32 :
+#endif
+ &ireq->loc_addr;
+ entry.daddr =
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ (entry.family == AF_INET6) ?
+ tcp6_rsk(req)->rmt_addr.s6_addr32 :
+#endif
+ &ireq->rmt_addr;
+ entry.dport = ntohs(ireq->rmt_port);
+
+ if (!inet_diag_bc_run(RTA_DATA(bc),
+ RTA_PAYLOAD(bc), &entry))
+ continue;
+ }
+
+ err = inet_diag_fill_req(skb, sk, req,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, cb->nlh);
+ if (err < 0) {
+ cb->args[3] = j + 1;
+ cb->args[4] = reqnum;
+ goto out;
+ }
+ }
+
+ s_reqnum = 0;
+ }
+
+out:
+ read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
+
+ return err;
+}
+
+static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int i, num;
+ int s_i, s_num;
+ struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
+ const struct inet_diag_handler *handler;
+ struct inet_hashinfo *hashinfo;
+
+ handler = inet_diag_table[cb->nlh->nlmsg_type];
+ BUG_ON(handler == NULL);
+ hashinfo = handler->idiag_hashinfo;
+
+ s_i = cb->args[1];
+ s_num = num = cb->args[2];
+
+ if (cb->args[0] == 0) {
+ if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
+ goto skip_listen_ht;
+
+ inet_listen_lock(hashinfo);
+ for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
+ struct sock *sk;
+ struct hlist_node *node;
+
+ num = 0;
+ sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num) {
+ num++;
+ continue;
+ }
+
+ if (r->id.idiag_sport != inet->sport &&
+ r->id.idiag_sport)
+ goto next_listen;
+
+ if (!(r->idiag_states & TCPF_LISTEN) ||
+ r->id.idiag_dport ||
+ cb->args[3] > 0)
+ goto syn_recv;
+
+ if (inet_diag_dump_sock(skb, sk, cb) < 0) {
+ inet_listen_unlock(hashinfo);
+ goto done;
+ }
+
+syn_recv:
+ if (!(r->idiag_states & TCPF_SYN_RECV))
+ goto next_listen;
+
+ if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
+ inet_listen_unlock(hashinfo);
+ goto done;
+ }
+
+next_listen:
+ cb->args[3] = 0;
+ cb->args[4] = 0;
+ ++num;
+ }
+
+ s_num = 0;
+ cb->args[3] = 0;
+ cb->args[4] = 0;
+ }
+ inet_listen_unlock(hashinfo);
+skip_listen_ht:
+ cb->args[0] = 1;
+ s_i = num = s_num = 0;
+ }
+
+ if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
+ return skb->len;
+
+ for (i = s_i; i < hashinfo->ehash_size; i++) {
+ struct inet_ehash_bucket *head = &hashinfo->ehash[i];
+ struct sock *sk;
+ struct hlist_node *node;
+
+ if (i > s_i)
+ s_num = 0;
+
+ read_lock_bh(&head->lock);
+
+ num = 0;
+ sk_for_each(sk, node, &head->chain) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num)
+ goto next_normal;
+ if (!(r->idiag_states & (1 << sk->sk_state)))
+ goto next_normal;
+ if (r->id.idiag_sport != inet->sport &&
+ r->id.idiag_sport)
+ goto next_normal;
+ if (r->id.idiag_dport != inet->dport && r->id.idiag_dport)
+ goto next_normal;
+ if (inet_diag_dump_sock(skb, sk, cb) < 0) {
+ read_unlock_bh(&head->lock);
+ goto done;
+ }
+next_normal:
+ ++num;
+ }
+
+ if (r->idiag_states & TCPF_TIME_WAIT) {
+ sk_for_each(sk, node,
+ &hashinfo->ehash[i + hashinfo->ehash_size].chain) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num)
+ goto next_dying;
+ if (r->id.idiag_sport != inet->sport &&
+ r->id.idiag_sport)
+ goto next_dying;
+ if (r->id.idiag_dport != inet->dport &&
+ r->id.idiag_dport)
+ goto next_dying;
+ if (inet_diag_dump_sock(skb, sk, cb) < 0) {
+ read_unlock_bh(&head->lock);
+ goto done;
+ }
+next_dying:
+ ++num;
+ }
+ }
+ read_unlock_bh(&head->lock);
+ }
+
+done:
+ cb->args[1] = i;
+ cb->args[2] = num;
+ return skb->len;
+}
+
+static int inet_diag_dump_done(struct netlink_callback *cb)
+{
+ return 0;
+}
+
+
+static __inline__ int
+inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+ if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
+ return 0;
+
+ if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX)
+ goto err_inval;
+
+ if (inet_diag_table[nlh->nlmsg_type] == NULL)
+ return -ENOENT;
+
+ if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len)
+ goto err_inval;
+
+ if (nlh->nlmsg_flags&NLM_F_DUMP) {
+ if (nlh->nlmsg_len >
+ (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) {
+ struct rtattr *rta = (void *)(NLMSG_DATA(nlh) +
+ sizeof(struct inet_diag_req));
+ if (rta->rta_type != INET_DIAG_REQ_BYTECODE ||
+ rta->rta_len < 8 ||
+ rta->rta_len >
+ (nlh->nlmsg_len -
+ NLMSG_SPACE(sizeof(struct inet_diag_req))))
+ goto err_inval;
+ if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
+ goto err_inval;
+ }
+ return netlink_dump_start(idiagnl, skb, nlh,
+ inet_diag_dump,
+ inet_diag_dump_done);
+ } else {
+ return inet_diag_get_exact(skb, nlh);
+ }
+
+err_inval:
+ return -EINVAL;
+}
+
+
+static inline void inet_diag_rcv_skb(struct sk_buff *skb)
+{
+ int err;
+ struct nlmsghdr * nlh;
+
+ if (skb->len >= NLMSG_SPACE(0)) {
+ nlh = (struct nlmsghdr *)skb->data;
+ if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
+ return;
+ err = inet_diag_rcv_msg(skb, nlh);
+ if (err || nlh->nlmsg_flags & NLM_F_ACK)
+ netlink_ack(skb, nlh, err);
+ }
+}
+
+static void inet_diag_rcv(struct sock *sk, int len)
+{
+ struct sk_buff *skb;
+ unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
+
+ while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) {
+ inet_diag_rcv_skb(skb);
+ kfree_skb(skb);
+ }
+}
+
+static DEFINE_SPINLOCK(inet_diag_register_lock);
+
+int inet_diag_register(const struct inet_diag_handler *h)
+{
+ const __u16 type = h->idiag_type;
+ int err = -EINVAL;
+
+ if (type >= INET_DIAG_GETSOCK_MAX)
+ goto out;
+
+ spin_lock(&inet_diag_register_lock);
+ err = -EEXIST;
+ if (inet_diag_table[type] == NULL) {
+ inet_diag_table[type] = h;
+ err = 0;
+ }
+ spin_unlock(&inet_diag_register_lock);
+out:
+ return err;
+}
+EXPORT_SYMBOL_GPL(inet_diag_register);
+
+void inet_diag_unregister(const struct inet_diag_handler *h)
+{
+ const __u16 type = h->idiag_type;
+
+ if (type >= INET_DIAG_GETSOCK_MAX)
+ return;
+
+ spin_lock(&inet_diag_register_lock);
+ inet_diag_table[type] = NULL;
+ spin_unlock(&inet_diag_register_lock);
+
+ synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(inet_diag_unregister);
+
+static int __init inet_diag_init(void)
+{
+ const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
+ sizeof(struct inet_diag_handler *));
+ int err = -ENOMEM;
+
+ inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL);
+ if (!inet_diag_table)
+ goto out;
+
+ memset(inet_diag_table, 0, inet_diag_table_size);
+ idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv,
+ THIS_MODULE);
+ if (idiagnl == NULL)
+ goto out_free_table;
+ err = 0;
+out:
+ return err;
+out_free_table:
+ kfree(inet_diag_table);
+ goto out;
+}
+
+static void __exit inet_diag_exit(void)
+{
+ sock_release(idiagnl->sk_socket);
+ kfree(inet_diag_table);
+}
+
+module_init(inet_diag_init);
+module_exit(inet_diag_exit);
+MODULE_LICENSE("GPL");
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
new file mode 100644
index 000000000000..e8d29fe736d2
--- /dev/null
+++ b/net/ipv4/inet_hashtables.c
@@ -0,0 +1,165 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Generic INET transport hashtables
+ *
+ * Authors: Lotsa people, from code originally in tcp
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+
+#include <net/inet_connection_sock.h>
+#include <net/inet_hashtables.h>
+
+/*
+ * Allocate and initialize a new local port bind bucket.
+ * The bindhash mutex for snum's hash chain must be held here.
+ */
+struct inet_bind_bucket *inet_bind_bucket_create(kmem_cache_t *cachep,
+ struct inet_bind_hashbucket *head,
+ const unsigned short snum)
+{
+ struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, SLAB_ATOMIC);
+
+ if (tb != NULL) {
+ tb->port = snum;
+ tb->fastreuse = 0;
+ INIT_HLIST_HEAD(&tb->owners);
+ hlist_add_head(&tb->node, &head->chain);
+ }
+ return tb;
+}
+
+EXPORT_SYMBOL(inet_bind_bucket_create);
+
+/*
+ * Caller must hold hashbucket lock for this tb with local BH disabled
+ */
+void inet_bind_bucket_destroy(kmem_cache_t *cachep, struct inet_bind_bucket *tb)
+{
+ if (hlist_empty(&tb->owners)) {
+ __hlist_del(&tb->node);
+ kmem_cache_free(cachep, tb);
+ }
+}
+
+void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
+ const unsigned short snum)
+{
+ inet_sk(sk)->num = snum;
+ sk_add_bind_node(sk, &tb->owners);
+ inet_csk(sk)->icsk_bind_hash = tb;
+}
+
+EXPORT_SYMBOL(inet_bind_hash);
+
+/*
+ * Get rid of any references to a local port held by the given sock.
+ */
+static void __inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
+{
+ const int bhash = inet_bhashfn(inet_sk(sk)->num, hashinfo->bhash_size);
+ struct inet_bind_hashbucket *head = &hashinfo->bhash[bhash];
+ struct inet_bind_bucket *tb;
+
+ spin_lock(&head->lock);
+ tb = inet_csk(sk)->icsk_bind_hash;
+ __sk_del_bind_node(sk);
+ inet_csk(sk)->icsk_bind_hash = NULL;
+ inet_sk(sk)->num = 0;
+ inet_bind_bucket_destroy(hashinfo->bind_bucket_cachep, tb);
+ spin_unlock(&head->lock);
+}
+
+void inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
+{
+ local_bh_disable();
+ __inet_put_port(hashinfo, sk);
+ local_bh_enable();
+}
+
+EXPORT_SYMBOL(inet_put_port);
+
+/*
+ * This lock without WQ_FLAG_EXCLUSIVE is good on UP and it can be very bad on SMP.
+ * Look, when several writers sleep and reader wakes them up, all but one
+ * immediately hit write lock and grab all the cpus. Exclusive sleep solves
+ * this, _but_ remember, it adds useless work on UP machines (wake up each
+ * exclusive lock release). It should be ifdefed really.
+ */
+void inet_listen_wlock(struct inet_hashinfo *hashinfo)
+{
+ write_lock(&hashinfo->lhash_lock);
+
+ if (atomic_read(&hashinfo->lhash_users)) {
+ DEFINE_WAIT(wait);
+
+ for (;;) {
+ prepare_to_wait_exclusive(&hashinfo->lhash_wait,
+ &wait, TASK_UNINTERRUPTIBLE);
+ if (!atomic_read(&hashinfo->lhash_users))
+ break;
+ write_unlock_bh(&hashinfo->lhash_lock);
+ schedule();
+ write_lock_bh(&hashinfo->lhash_lock);
+ }
+
+ finish_wait(&hashinfo->lhash_wait, &wait);
+ }
+}
+
+EXPORT_SYMBOL(inet_listen_wlock);
+
+/*
+ * Don't inline this cruft. Here are some nice properties to exploit here. The
+ * BSD API does not allow a listening sock to specify the remote port nor the
+ * remote address for the connection. So always assume those are both
+ * wildcarded during the search since they can never be otherwise.
+ */
+struct sock *__inet_lookup_listener(const struct hlist_head *head, const u32 daddr,
+ const unsigned short hnum, const int dif)
+{
+ struct sock *result = NULL, *sk;
+ const struct hlist_node *node;
+ int hiscore = -1;
+
+ sk_for_each(sk, node, head) {
+ const struct inet_sock *inet = inet_sk(sk);
+
+ if (inet->num == hnum && !ipv6_only_sock(sk)) {
+ const __u32 rcv_saddr = inet->rcv_saddr;
+ int score = sk->sk_family == PF_INET ? 1 : 0;
+
+ if (rcv_saddr) {
+ if (rcv_saddr != daddr)
+ continue;
+ score += 2;
+ }
+ if (sk->sk_bound_dev_if) {
+ if (sk->sk_bound_dev_if != dif)
+ continue;
+ score += 2;
+ }
+ if (score == 5)
+ return sk;
+ if (score > hiscore) {
+ hiscore = score;
+ result = sk;
+ }
+ }
+ }
+ return result;
+}
+
+EXPORT_SYMBOL_GPL(__inet_lookup_listener);
diff --git a/net/ipv4/inet_timewait_sock.c b/net/ipv4/inet_timewait_sock.c
new file mode 100644
index 000000000000..4d1502a49852
--- /dev/null
+++ b/net/ipv4/inet_timewait_sock.c
@@ -0,0 +1,384 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Generic TIME_WAIT sockets functions
+ *
+ * From code orinally in TCP
+ */
+
+#include <linux/config.h>
+
+#include <net/inet_hashtables.h>
+#include <net/inet_timewait_sock.h>
+#include <net/ip.h>
+
+/* Must be called with locally disabled BHs. */
+void __inet_twsk_kill(struct inet_timewait_sock *tw, struct inet_hashinfo *hashinfo)
+{
+ struct inet_bind_hashbucket *bhead;
+ struct inet_bind_bucket *tb;
+ /* Unlink from established hashes. */
+ struct inet_ehash_bucket *ehead = &hashinfo->ehash[tw->tw_hashent];
+
+ write_lock(&ehead->lock);
+ if (hlist_unhashed(&tw->tw_node)) {
+ write_unlock(&ehead->lock);
+ return;
+ }
+ __hlist_del(&tw->tw_node);
+ sk_node_init(&tw->tw_node);
+ write_unlock(&ehead->lock);
+
+ /* Disassociate with bind bucket. */
+ bhead = &hashinfo->bhash[inet_bhashfn(tw->tw_num, hashinfo->bhash_size)];
+ spin_lock(&bhead->lock);
+ tb = tw->tw_tb;
+ __hlist_del(&tw->tw_bind_node);
+ tw->tw_tb = NULL;
+ inet_bind_bucket_destroy(hashinfo->bind_bucket_cachep, tb);
+ spin_unlock(&bhead->lock);
+#ifdef SOCK_REFCNT_DEBUG
+ if (atomic_read(&tw->tw_refcnt) != 1) {
+ printk(KERN_DEBUG "%s timewait_sock %p refcnt=%d\n",
+ tw->tw_prot->name, tw, atomic_read(&tw->tw_refcnt));
+ }
+#endif
+ inet_twsk_put(tw);
+}
+
+EXPORT_SYMBOL_GPL(__inet_twsk_kill);
+
+/*
+ * Enter the time wait state. This is called with locally disabled BH.
+ * Essentially we whip up a timewait bucket, copy the relevant info into it
+ * from the SK, and mess with hash chains and list linkage.
+ */
+void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
+ struct inet_hashinfo *hashinfo)
+{
+ const struct inet_sock *inet = inet_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct inet_ehash_bucket *ehead = &hashinfo->ehash[sk->sk_hashent];
+ struct inet_bind_hashbucket *bhead;
+ /* Step 1: Put TW into bind hash. Original socket stays there too.
+ Note, that any socket with inet->num != 0 MUST be bound in
+ binding cache, even if it is closed.
+ */
+ bhead = &hashinfo->bhash[inet_bhashfn(inet->num, hashinfo->bhash_size)];
+ spin_lock(&bhead->lock);
+ tw->tw_tb = icsk->icsk_bind_hash;
+ BUG_TRAP(icsk->icsk_bind_hash);
+ inet_twsk_add_bind_node(tw, &tw->tw_tb->owners);
+ spin_unlock(&bhead->lock);
+
+ write_lock(&ehead->lock);
+
+ /* Step 2: Remove SK from established hash. */
+ if (__sk_del_node_init(sk))
+ sock_prot_dec_use(sk->sk_prot);
+
+ /* Step 3: Hash TW into TIMEWAIT half of established hash table. */
+ inet_twsk_add_node(tw, &(ehead + hashinfo->ehash_size)->chain);
+ atomic_inc(&tw->tw_refcnt);
+
+ write_unlock(&ehead->lock);
+}
+
+EXPORT_SYMBOL_GPL(__inet_twsk_hashdance);
+
+struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, const int state)
+{
+ struct inet_timewait_sock *tw = kmem_cache_alloc(sk->sk_prot_creator->twsk_slab,
+ SLAB_ATOMIC);
+ if (tw != NULL) {
+ const struct inet_sock *inet = inet_sk(sk);
+
+ /* Give us an identity. */
+ tw->tw_daddr = inet->daddr;
+ tw->tw_rcv_saddr = inet->rcv_saddr;
+ tw->tw_bound_dev_if = sk->sk_bound_dev_if;
+ tw->tw_num = inet->num;
+ tw->tw_state = TCP_TIME_WAIT;
+ tw->tw_substate = state;
+ tw->tw_sport = inet->sport;
+ tw->tw_dport = inet->dport;
+ tw->tw_family = sk->sk_family;
+ tw->tw_reuse = sk->sk_reuse;
+ tw->tw_hashent = sk->sk_hashent;
+ tw->tw_ipv6only = 0;
+ tw->tw_prot = sk->sk_prot_creator;
+ atomic_set(&tw->tw_refcnt, 1);
+ inet_twsk_dead_node_init(tw);
+ }
+
+ return tw;
+}
+
+EXPORT_SYMBOL_GPL(inet_twsk_alloc);
+
+/* Returns non-zero if quota exceeded. */
+static int inet_twdr_do_twkill_work(struct inet_timewait_death_row *twdr,
+ const int slot)
+{
+ struct inet_timewait_sock *tw;
+ struct hlist_node *node;
+ unsigned int killed;
+ int ret;
+
+ /* NOTE: compare this to previous version where lock
+ * was released after detaching chain. It was racy,
+ * because tw buckets are scheduled in not serialized context
+ * in 2.3 (with netfilter), and with softnet it is common, because
+ * soft irqs are not sequenced.
+ */
+ killed = 0;
+ ret = 0;
+rescan:
+ inet_twsk_for_each_inmate(tw, node, &twdr->cells[slot]) {
+ __inet_twsk_del_dead_node(tw);
+ spin_unlock(&twdr->death_lock);
+ __inet_twsk_kill(tw, twdr->hashinfo);
+ inet_twsk_put(tw);
+ killed++;
+ spin_lock(&twdr->death_lock);
+ if (killed > INET_TWDR_TWKILL_QUOTA) {
+ ret = 1;
+ break;
+ }
+
+ /* While we dropped twdr->death_lock, another cpu may have
+ * killed off the next TW bucket in the list, therefore
+ * do a fresh re-read of the hlist head node with the
+ * lock reacquired. We still use the hlist traversal
+ * macro in order to get the prefetches.
+ */
+ goto rescan;
+ }
+
+ twdr->tw_count -= killed;
+ NET_ADD_STATS_BH(LINUX_MIB_TIMEWAITED, killed);
+
+ return ret;
+}
+
+void inet_twdr_hangman(unsigned long data)
+{
+ struct inet_timewait_death_row *twdr;
+ int unsigned need_timer;
+
+ twdr = (struct inet_timewait_death_row *)data;
+ spin_lock(&twdr->death_lock);
+
+ if (twdr->tw_count == 0)
+ goto out;
+
+ need_timer = 0;
+ if (inet_twdr_do_twkill_work(twdr, twdr->slot)) {
+ twdr->thread_slots |= (1 << twdr->slot);
+ mb();
+ schedule_work(&twdr->twkill_work);
+ need_timer = 1;
+ } else {
+ /* We purged the entire slot, anything left? */
+ if (twdr->tw_count)
+ need_timer = 1;
+ }
+ twdr->slot = ((twdr->slot + 1) & (INET_TWDR_TWKILL_SLOTS - 1));
+ if (need_timer)
+ mod_timer(&twdr->tw_timer, jiffies + twdr->period);
+out:
+ spin_unlock(&twdr->death_lock);
+}
+
+EXPORT_SYMBOL_GPL(inet_twdr_hangman);
+
+extern void twkill_slots_invalid(void);
+
+void inet_twdr_twkill_work(void *data)
+{
+ struct inet_timewait_death_row *twdr = data;
+ int i;
+
+ if ((INET_TWDR_TWKILL_SLOTS - 1) > (sizeof(twdr->thread_slots) * 8))
+ twkill_slots_invalid();
+
+ while (twdr->thread_slots) {
+ spin_lock_bh(&twdr->death_lock);
+ for (i = 0; i < INET_TWDR_TWKILL_SLOTS; i++) {
+ if (!(twdr->thread_slots & (1 << i)))
+ continue;
+
+ while (inet_twdr_do_twkill_work(twdr, i) != 0) {
+ if (need_resched()) {
+ spin_unlock_bh(&twdr->death_lock);
+ schedule();
+ spin_lock_bh(&twdr->death_lock);
+ }
+ }
+
+ twdr->thread_slots &= ~(1 << i);
+ }
+ spin_unlock_bh(&twdr->death_lock);
+ }
+}
+
+EXPORT_SYMBOL_GPL(inet_twdr_twkill_work);
+
+/* These are always called from BH context. See callers in
+ * tcp_input.c to verify this.
+ */
+
+/* This is for handling early-kills of TIME_WAIT sockets. */
+void inet_twsk_deschedule(struct inet_timewait_sock *tw,
+ struct inet_timewait_death_row *twdr)
+{
+ spin_lock(&twdr->death_lock);
+ if (inet_twsk_del_dead_node(tw)) {
+ inet_twsk_put(tw);
+ if (--twdr->tw_count == 0)
+ del_timer(&twdr->tw_timer);
+ }
+ spin_unlock(&twdr->death_lock);
+ __inet_twsk_kill(tw, twdr->hashinfo);
+}
+
+EXPORT_SYMBOL(inet_twsk_deschedule);
+
+void inet_twsk_schedule(struct inet_timewait_sock *tw,
+ struct inet_timewait_death_row *twdr,
+ const int timeo, const int timewait_len)
+{
+ struct hlist_head *list;
+ int slot;
+
+ /* timeout := RTO * 3.5
+ *
+ * 3.5 = 1+2+0.5 to wait for two retransmits.
+ *
+ * RATIONALE: if FIN arrived and we entered TIME-WAIT state,
+ * our ACK acking that FIN can be lost. If N subsequent retransmitted
+ * FINs (or previous seqments) are lost (probability of such event
+ * is p^(N+1), where p is probability to lose single packet and
+ * time to detect the loss is about RTO*(2^N - 1) with exponential
+ * backoff). Normal timewait length is calculated so, that we
+ * waited at least for one retransmitted FIN (maximal RTO is 120sec).
+ * [ BTW Linux. following BSD, violates this requirement waiting
+ * only for 60sec, we should wait at least for 240 secs.
+ * Well, 240 consumes too much of resources 8)
+ * ]
+ * This interval is not reduced to catch old duplicate and
+ * responces to our wandering segments living for two MSLs.
+ * However, if we use PAWS to detect
+ * old duplicates, we can reduce the interval to bounds required
+ * by RTO, rather than MSL. So, if peer understands PAWS, we
+ * kill tw bucket after 3.5*RTO (it is important that this number
+ * is greater than TS tick!) and detect old duplicates with help
+ * of PAWS.
+ */
+ slot = (timeo + (1 << INET_TWDR_RECYCLE_TICK) - 1) >> INET_TWDR_RECYCLE_TICK;
+
+ spin_lock(&twdr->death_lock);
+
+ /* Unlink it, if it was scheduled */
+ if (inet_twsk_del_dead_node(tw))
+ twdr->tw_count--;
+ else
+ atomic_inc(&tw->tw_refcnt);
+
+ if (slot >= INET_TWDR_RECYCLE_SLOTS) {
+ /* Schedule to slow timer */
+ if (timeo >= timewait_len) {
+ slot = INET_TWDR_TWKILL_SLOTS - 1;
+ } else {
+ slot = (timeo + twdr->period - 1) / twdr->period;
+ if (slot >= INET_TWDR_TWKILL_SLOTS)
+ slot = INET_TWDR_TWKILL_SLOTS - 1;
+ }
+ tw->tw_ttd = jiffies + timeo;
+ slot = (twdr->slot + slot) & (INET_TWDR_TWKILL_SLOTS - 1);
+ list = &twdr->cells[slot];
+ } else {
+ tw->tw_ttd = jiffies + (slot << INET_TWDR_RECYCLE_TICK);
+
+ if (twdr->twcal_hand < 0) {
+ twdr->twcal_hand = 0;
+ twdr->twcal_jiffie = jiffies;
+ twdr->twcal_timer.expires = twdr->twcal_jiffie +
+ (slot << INET_TWDR_RECYCLE_TICK);
+ add_timer(&twdr->twcal_timer);
+ } else {
+ if (time_after(twdr->twcal_timer.expires,
+ jiffies + (slot << INET_TWDR_RECYCLE_TICK)))
+ mod_timer(&twdr->twcal_timer,
+ jiffies + (slot << INET_TWDR_RECYCLE_TICK));
+ slot = (twdr->twcal_hand + slot) & (INET_TWDR_RECYCLE_SLOTS - 1);
+ }
+ list = &twdr->twcal_row[slot];
+ }
+
+ hlist_add_head(&tw->tw_death_node, list);
+
+ if (twdr->tw_count++ == 0)
+ mod_timer(&twdr->tw_timer, jiffies + twdr->period);
+ spin_unlock(&twdr->death_lock);
+}
+
+EXPORT_SYMBOL_GPL(inet_twsk_schedule);
+
+void inet_twdr_twcal_tick(unsigned long data)
+{
+ struct inet_timewait_death_row *twdr;
+ int n, slot;
+ unsigned long j;
+ unsigned long now = jiffies;
+ int killed = 0;
+ int adv = 0;
+
+ twdr = (struct inet_timewait_death_row *)data;
+
+ spin_lock(&twdr->death_lock);
+ if (twdr->twcal_hand < 0)
+ goto out;
+
+ slot = twdr->twcal_hand;
+ j = twdr->twcal_jiffie;
+
+ for (n = 0; n < INET_TWDR_RECYCLE_SLOTS; n++) {
+ if (time_before_eq(j, now)) {
+ struct hlist_node *node, *safe;
+ struct inet_timewait_sock *tw;
+
+ inet_twsk_for_each_inmate_safe(tw, node, safe,
+ &twdr->twcal_row[slot]) {
+ __inet_twsk_del_dead_node(tw);
+ __inet_twsk_kill(tw, twdr->hashinfo);
+ inet_twsk_put(tw);
+ killed++;
+ }
+ } else {
+ if (!adv) {
+ adv = 1;
+ twdr->twcal_jiffie = j;
+ twdr->twcal_hand = slot;
+ }
+
+ if (!hlist_empty(&twdr->twcal_row[slot])) {
+ mod_timer(&twdr->twcal_timer, j);
+ goto out;
+ }
+ }
+ j += 1 << INET_TWDR_RECYCLE_TICK;
+ slot = (slot + 1) & (INET_TWDR_RECYCLE_SLOTS - 1);
+ }
+ twdr->twcal_hand = -1;
+
+out:
+ if ((twdr->tw_count -= killed) == 0)
+ del_timer(&twdr->tw_timer);
+ NET_ADD_STATS_BH(LINUX_MIB_TIMEWAITKILLED, killed);
+ spin_unlock(&twdr->death_lock);
+}
+
+EXPORT_SYMBOL_GPL(inet_twdr_twcal_tick);
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index ab18a853d7ce..f84ba9c96551 100644
--- a/net/ipv4/inetpeer.c
+++ b/net/ipv4/inetpeer.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/net.h>
+#include <net/ip.h>
#include <net/inetpeer.h>
/*
@@ -72,7 +73,7 @@
/* Exported for inet_getid inline function. */
DEFINE_SPINLOCK(inet_peer_idlock);
-static kmem_cache_t *peer_cachep;
+static kmem_cache_t *peer_cachep __read_mostly;
#define node_height(x) x->avl_height
static struct inet_peer peer_fake_node = {
@@ -459,5 +460,3 @@ static void peer_check_expire(unsigned long dummy)
peer_total / inet_peer_threshold * HZ;
add_timer(&peer_periodic_timer);
}
-
-EXPORT_SYMBOL(inet_peer_idlock);
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 77094aac6c28..0923add122b4 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -76,16 +76,12 @@ int ip_forward(struct sk_buff *skb)
* that reaches zero, we must reply an ICMP control message telling
* that the packet's lifetime expired.
*/
-
- iph = skb->nh.iph;
-
- if (iph->ttl <= 1)
+ if (skb->nh.iph->ttl <= 1)
goto too_many_hops;
if (!xfrm4_route_forward(skb))
goto drop;
- iph = skb->nh.iph;
rt = (struct rtable*)skb->dst;
if (opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index eb377ae15305..9e6e683cc34d 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -377,7 +377,7 @@ static struct ipq *ip_frag_create(unsigned hash, struct iphdr *iph, u32 user)
return ip_frag_intern(hash, qp);
out_nomem:
- LIMIT_NETDEBUG(printk(KERN_ERR "ip_frag_create: no memory left !\n"));
+ LIMIT_NETDEBUG(KERN_ERR "ip_frag_create: no memory left !\n");
return NULL;
}
@@ -533,7 +533,7 @@ static void ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
if (skb->dev)
qp->iif = skb->dev->ifindex;
skb->dev = NULL;
- qp->stamp = skb->stamp;
+ skb_get_timestamp(skb, &qp->stamp);
qp->meat += skb->len;
atomic_add(skb->truesize, &ip_frag_mem);
if (offset == 0)
@@ -615,7 +615,7 @@ static struct sk_buff *ip_frag_reasm(struct ipq *qp, struct net_device *dev)
head->next = NULL;
head->dev = dev;
- head->stamp = qp->stamp;
+ skb_set_timestamp(head, &qp->stamp);
iph = head->nh.iph;
iph->frag_off = 0;
@@ -625,8 +625,8 @@ static struct sk_buff *ip_frag_reasm(struct ipq *qp, struct net_device *dev)
return head;
out_nomem:
- LIMIT_NETDEBUG(printk(KERN_ERR "IP: queue_glue: no memory for gluing "
- "queue %p\n", qp));
+ LIMIT_NETDEBUG(KERN_ERR "IP: queue_glue: no memory for gluing "
+ "queue %p\n", qp);
goto out_fail;
out_oversize:
if (net_ratelimit())
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index c703528e0bcd..473d0f2b2e0d 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -150,7 +150,7 @@
* SNMP management statistics
*/
-DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics);
+DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics) __read_mostly;
/*
* Process Router Attention IP option
@@ -225,8 +225,8 @@ static inline int ip_local_deliver_finish(struct sk_buff *skb)
/* If there maybe a raw socket we must check - if not we
* don't care less
*/
- if (raw_sk)
- raw_v4_input(skb, skb->nh.iph, hash);
+ if (raw_sk && !raw_v4_input(skb, skb->nh.iph, hash))
+ raw_sk = NULL;
if ((ipprot = rcu_dereference(inet_protos[hash])) != NULL) {
int ret;
@@ -279,18 +279,70 @@ int ip_local_deliver(struct sk_buff *skb)
ip_local_deliver_finish);
}
-static inline int ip_rcv_finish(struct sk_buff *skb)
+static inline int ip_rcv_options(struct sk_buff *skb)
{
+ struct ip_options *opt;
+ struct iphdr *iph;
struct net_device *dev = skb->dev;
+
+ /* It looks as overkill, because not all
+ IP options require packet mangling.
+ But it is the easiest for now, especially taking
+ into account that combination of IP options
+ and running sniffer is extremely rare condition.
+ --ANK (980813)
+ */
+ if (skb_cow(skb, skb_headroom(skb))) {
+ IP_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+ goto drop;
+ }
+
+ iph = skb->nh.iph;
+
+ if (ip_options_compile(NULL, skb)) {
+ IP_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+ goto drop;
+ }
+
+ opt = &(IPCB(skb)->opt);
+ if (unlikely(opt->srr)) {
+ struct in_device *in_dev = in_dev_get(dev);
+ if (in_dev) {
+ if (!IN_DEV_SOURCE_ROUTE(in_dev)) {
+ if (IN_DEV_LOG_MARTIANS(in_dev) &&
+ net_ratelimit())
+ printk(KERN_INFO "source route option "
+ "%u.%u.%u.%u -> %u.%u.%u.%u\n",
+ NIPQUAD(iph->saddr),
+ NIPQUAD(iph->daddr));
+ in_dev_put(in_dev);
+ goto drop;
+ }
+
+ in_dev_put(in_dev);
+ }
+
+ if (ip_options_rcv_srr(skb))
+ goto drop;
+ }
+
+ return 0;
+drop:
+ return -1;
+}
+
+static inline int ip_rcv_finish(struct sk_buff *skb)
+{
struct iphdr *iph = skb->nh.iph;
- int err;
/*
* Initialise the virtual path cache for the packet. It describes
* how the packet travels inside Linux networking.
*/
- if (skb->dst == NULL) {
- if ((err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev))) {
+ if (likely(skb->dst == NULL)) {
+ int err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
+ skb->dev);
+ if (unlikely(err)) {
if (err == -EHOSTUNREACH)
IP_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
goto drop;
@@ -298,7 +350,7 @@ static inline int ip_rcv_finish(struct sk_buff *skb)
}
#ifdef CONFIG_NET_CLS_ROUTE
- if (skb->dst->tclassid) {
+ if (unlikely(skb->dst->tclassid)) {
struct ip_rt_acct *st = ip_rt_acct + 256*smp_processor_id();
u32 idx = skb->dst->tclassid;
st[idx&0xFF].o_packets++;
@@ -308,48 +360,11 @@ static inline int ip_rcv_finish(struct sk_buff *skb)
}
#endif
- if (iph->ihl > 5) {
- struct ip_options *opt;
-
- /* It looks as overkill, because not all
- IP options require packet mangling.
- But it is the easiest for now, especially taking
- into account that combination of IP options
- and running sniffer is extremely rare condition.
- --ANK (980813)
- */
-
- if (skb_cow(skb, skb_headroom(skb))) {
- IP_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
- goto drop;
- }
- iph = skb->nh.iph;
-
- if (ip_options_compile(NULL, skb))
- goto inhdr_error;
-
- opt = &(IPCB(skb)->opt);
- if (opt->srr) {
- struct in_device *in_dev = in_dev_get(dev);
- if (in_dev) {
- if (!IN_DEV_SOURCE_ROUTE(in_dev)) {
- if (IN_DEV_LOG_MARTIANS(in_dev) && net_ratelimit())
- printk(KERN_INFO "source route option %u.%u.%u.%u -> %u.%u.%u.%u\n",
- NIPQUAD(iph->saddr), NIPQUAD(iph->daddr));
- in_dev_put(in_dev);
- goto drop;
- }
- in_dev_put(in_dev);
- }
- if (ip_options_rcv_srr(skb))
- goto drop;
- }
- }
+ if (iph->ihl > 5 && ip_rcv_options(skb))
+ goto drop;
return dst_input(skb);
-inhdr_error:
- IP_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
drop:
kfree_skb(skb);
return NET_RX_DROP;
@@ -358,9 +373,10 @@ drop:
/*
* Main IP Receive routine.
*/
-int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct iphdr *iph;
+ u32 len;
/* When the interface is in promisc. mode, drop all the crap
* that it receives, do not try to analyse it.
@@ -392,29 +408,27 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
*/
if (iph->ihl < 5 || iph->version != 4)
- goto inhdr_error;
+ goto inhdr_error;
if (!pskb_may_pull(skb, iph->ihl*4))
goto inhdr_error;
iph = skb->nh.iph;
- if (ip_fast_csum((u8 *)iph, iph->ihl) != 0)
- goto inhdr_error;
+ if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
+ goto inhdr_error;
- {
- __u32 len = ntohs(iph->tot_len);
- if (skb->len < len || len < (iph->ihl<<2))
- goto inhdr_error;
+ len = ntohs(iph->tot_len);
+ if (skb->len < len || len < (iph->ihl*4))
+ goto inhdr_error;
- /* Our transport medium may have padded the buffer out. Now we know it
- * is IP we can trim to the true length of the frame.
- * Note this now means skb->len holds ntohs(iph->tot_len).
- */
- if (pskb_trim_rcsum(skb, len)) {
- IP_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
- goto drop;
- }
+ /* Our transport medium may have padded the buffer out. Now we know it
+ * is IP we can trim to the true length of the frame.
+ * Note this now means skb->len holds ntohs(iph->tot_len).
+ */
+ if (pskb_trim_rcsum(skb, len)) {
+ IP_INC_STATS_BH(IPSTATS_MIB_INDISCARDS);
+ goto drop;
}
return NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, dev, NULL,
@@ -428,5 +442,4 @@ out:
return NET_RX_DROP;
}
-EXPORT_SYMBOL(ip_rcv);
EXPORT_SYMBOL(ip_statistics);
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index 6d89f3f3e701..bce4e875193b 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -489,23 +489,18 @@ void ip_options_undo(struct ip_options * opt)
}
}
-int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen, int user)
+static struct ip_options *ip_options_get_alloc(const int optlen)
{
- struct ip_options *opt;
+ struct ip_options *opt = kmalloc(sizeof(*opt) + ((optlen + 3) & ~3),
+ GFP_KERNEL);
+ if (opt)
+ memset(opt, 0, sizeof(*opt));
+ return opt;
+}
- opt = kmalloc(sizeof(struct ip_options)+((optlen+3)&~3), GFP_KERNEL);
- if (!opt)
- return -ENOMEM;
- memset(opt, 0, sizeof(struct ip_options));
- if (optlen) {
- if (user) {
- if (copy_from_user(opt->__data, data, optlen)) {
- kfree(opt);
- return -EFAULT;
- }
- } else
- memcpy(opt->__data, data, optlen);
- }
+static int ip_options_get_finish(struct ip_options **optp,
+ struct ip_options *opt, int optlen)
+{
while (optlen & 3)
opt->__data[optlen++] = IPOPT_END;
opt->optlen = optlen;
@@ -521,6 +516,30 @@ int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen, in
return 0;
}
+int ip_options_get_from_user(struct ip_options **optp, unsigned char __user *data, int optlen)
+{
+ struct ip_options *opt = ip_options_get_alloc(optlen);
+
+ if (!opt)
+ return -ENOMEM;
+ if (optlen && copy_from_user(opt->__data, data, optlen)) {
+ kfree(opt);
+ return -EFAULT;
+ }
+ return ip_options_get_finish(optp, opt, optlen);
+}
+
+int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen)
+{
+ struct ip_options *opt = ip_options_get_alloc(optlen);
+
+ if (!opt)
+ return -ENOMEM;
+ if (optlen)
+ memcpy(opt->__data, data, optlen);
+ return ip_options_get_finish(optp, opt, optlen);
+}
+
void ip_forward_options(struct sk_buff *skb)
{
struct ip_options * opt = &(IPCB(skb)->opt);
@@ -620,6 +639,3 @@ int ip_options_rcv_srr(struct sk_buff *skb)
}
return 0;
}
-
-EXPORT_SYMBOL(ip_options_compile);
-EXPORT_SYMBOL(ip_options_undo);
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 80d13103b2b0..3f1a263e1249 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -69,13 +69,10 @@
#include <net/ip.h>
#include <net/protocol.h>
#include <net/route.h>
-#include <net/tcp.h>
-#include <net/udp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/arp.h>
#include <net/icmp.h>
-#include <net/raw.h>
#include <net/checksum.h>
#include <net/inetpeer.h>
#include <net/checksum.h>
@@ -84,12 +81,8 @@
#include <linux/netfilter_bridge.h>
#include <linux/mroute.h>
#include <linux/netlink.h>
+#include <linux/tcp.h>
-/*
- * Shall we try to damage output packets if routing dev changes?
- */
-
-int sysctl_ip_dynaddr;
int sysctl_ip_default_ttl = IPDEFTTL;
/* Generate a checksum for an outgoing IP datagram. */
@@ -165,6 +158,8 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
dst_output);
}
+EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
+
static inline int ip_finish_output2(struct sk_buff *skb)
{
struct dst_entry *dst = skb->dst;
@@ -205,7 +200,7 @@ static inline int ip_finish_output2(struct sk_buff *skb)
return -EINVAL;
}
-int ip_finish_output(struct sk_buff *skb)
+static inline int ip_finish_output(struct sk_buff *skb)
{
struct net_device *dev = skb->dst->dev;
@@ -329,8 +324,7 @@ int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
if (ip_route_output_flow(&rt, &fl, sk, 0))
goto no_route;
}
- __sk_dst_set(sk, &rt->u.dst);
- tcp_v4_setup_caps(sk, &rt->u.dst);
+ sk_setup_caps(sk, &rt->u.dst);
}
skb->dst = dst_clone(&rt->u.dst);
@@ -392,7 +386,6 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
#endif
#ifdef CONFIG_NETFILTER
to->nfmark = from->nfmark;
- to->nfcache = from->nfcache;
/* Connection association is same as pre-frag packet */
nf_conntrack_put(to->nfct);
to->nfct = from->nfct;
@@ -580,7 +573,7 @@ slow_path:
*/
if ((skb2 = alloc_skb(len+hlen+ll_rs, GFP_ATOMIC)) == NULL) {
- NETDEBUG(printk(KERN_INFO "IP: frag: no memory for new fragment!\n"));
+ NETDEBUG(KERN_INFO "IP: frag: no memory for new fragment!\n");
err = -ENOMEM;
goto fail;
}
@@ -1329,12 +1322,7 @@ void __init ip_init(void)
#endif
}
-EXPORT_SYMBOL(ip_finish_output);
EXPORT_SYMBOL(ip_fragment);
EXPORT_SYMBOL(ip_generic_getfrag);
EXPORT_SYMBOL(ip_queue_xmit);
EXPORT_SYMBOL(ip_send_check);
-
-#ifdef CONFIG_SYSCTL
-EXPORT_SYMBOL(sysctl_ip_default_ttl);
-#endif
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index ff4bd067b397..2f0b47da5b37 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -153,7 +153,7 @@ int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc)
switch (cmsg->cmsg_type) {
case IP_RETOPTS:
err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr));
- err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40, 0);
+ err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40);
if (err)
return err;
break;
@@ -425,7 +425,7 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
struct ip_options * opt = NULL;
if (optlen > 40 || optlen < 0)
goto e_inval;
- err = ip_options_get(&opt, optval, optlen, 1);
+ err = ip_options_get_from_user(&opt, optval, optlen);
if (err)
break;
if (sk->sk_type == SOCK_STREAM) {
@@ -614,7 +614,6 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
}
case IP_MSFILTER:
{
- extern int sysctl_optmem_max;
extern int sysctl_igmp_max_msf;
struct ip_msfilter *msf;
@@ -769,7 +768,6 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
}
case MCAST_MSFILTER:
{
- extern int sysctl_optmem_max;
extern int sysctl_igmp_max_msf;
struct sockaddr_in *psin;
struct ip_msfilter *msf = NULL;
@@ -1090,7 +1088,5 @@ int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
EXPORT_SYMBOL(ip_cmsg_recv);
-#ifdef CONFIG_IP_SCTP_MODULE
EXPORT_SYMBOL(ip_getsockopt);
EXPORT_SYMBOL(ip_setsockopt);
-#endif
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 7ded6e60f43a..dcb7ee6c4858 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -214,8 +214,8 @@ static void ipcomp4_err(struct sk_buff *skb, u32 info)
spi, IPPROTO_COMP, AF_INET);
if (!x)
return;
- NETDEBUG(printk(KERN_DEBUG "pmtu discovery on SA IPCOMP/%08x/%u.%u.%u.%u\n",
- spi, NIPQUAD(iph->daddr)));
+ NETDEBUG(KERN_DEBUG "pmtu discovery on SA IPCOMP/%08x/%u.%u.%u.%u\n",
+ spi, NIPQUAD(iph->daddr));
xfrm_state_put(x);
}
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index d2bf8e1930a3..63e106605f28 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -393,7 +393,7 @@ static int __init ic_defaults(void)
#ifdef IPCONFIG_RARP
-static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt);
+static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev);
static struct packet_type rarp_packet_type __initdata = {
.type = __constant_htons(ETH_P_RARP),
@@ -414,7 +414,7 @@ static inline void ic_rarp_cleanup(void)
* Process received RARP packet.
*/
static int __init
-ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct arphdr *rarp;
unsigned char *rarp_ptr;
@@ -555,7 +555,7 @@ struct bootp_pkt { /* BOOTP packet format */
#define DHCPRELEASE 7
#define DHCPINFORM 8
-static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt);
+static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev);
static struct packet_type bootp_packet_type __initdata = {
.type = __constant_htons(ETH_P_IP),
@@ -823,7 +823,7 @@ static void __init ic_do_bootp_ext(u8 *ext)
/*
* Receive BOOTP reply.
*/
-static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct bootp_pkt *b;
struct iphdr *h;
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index dc806b578427..9dbf5909f3a6 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -103,7 +103,7 @@ static DEFINE_SPINLOCK(mfc_unres_lock);
In this case data path is free of exclusive locks at all.
*/
-static kmem_cache_t *mrt_cachep;
+static kmem_cache_t *mrt_cachep __read_mostly;
static int ip_mr_forward(struct sk_buff *skb, struct mfc_cache *cache, int local);
static int ipmr_cache_report(struct sk_buff *pkt, vifi_t vifi, int assert);
diff --git a/net/ipv4/ipvs/ip_vs_app.c b/net/ipv4/ipvs/ip_vs_app.c
index d9212addd193..6e092dadb388 100644
--- a/net/ipv4/ipvs/ip_vs_app.c
+++ b/net/ipv4/ipvs/ip_vs_app.c
@@ -26,6 +26,7 @@
#include <linux/in.h>
#include <linux/ip.h>
#include <net/protocol.h>
+#include <net/tcp.h>
#include <asm/system.h>
#include <linux/stat.h>
#include <linux/proc_fs.h>
diff --git a/net/ipv4/ipvs/ip_vs_conn.c b/net/ipv4/ipvs/ip_vs_conn.c
index d0145a8b1551..e11952ea17af 100644
--- a/net/ipv4/ipvs/ip_vs_conn.c
+++ b/net/ipv4/ipvs/ip_vs_conn.c
@@ -40,7 +40,7 @@
static struct list_head *ip_vs_conn_tab;
/* SLAB cache for IPVS connections */
-static kmem_cache_t *ip_vs_conn_cachep;
+static kmem_cache_t *ip_vs_conn_cachep __read_mostly;
/* counter for current IPVS connections */
static atomic_t ip_vs_conn_count = ATOMIC_INIT(0);
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
index 5fb257dd07cb..3ac7eeca04ac 100644
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ b/net/ipv4/ipvs/ip_vs_core.c
@@ -22,6 +22,7 @@
*
* Changes:
* Paul `Rusty' Russell properly handle non-linear skbs
+ * Harald Welte don't use nfcache
*
*/
@@ -529,7 +530,7 @@ static unsigned int ip_vs_post_routing(unsigned int hooknum,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- if (!((*pskb)->nfcache & NFC_IPVS_PROPERTY))
+ if (!((*pskb)->ipvs_property))
return NF_ACCEPT;
/* The packet was sent from IPVS, exit this chain */
@@ -701,7 +702,7 @@ static int ip_vs_out_icmp(struct sk_buff **pskb, int *related)
/* do the statistics and put it back */
ip_vs_out_stats(cp, skb);
- skb->nfcache |= NFC_IPVS_PROPERTY;
+ skb->ipvs_property = 1;
verdict = NF_ACCEPT;
out:
@@ -739,7 +740,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff **pskb,
EnterFunction(11);
- if (skb->nfcache & NFC_IPVS_PROPERTY)
+ if (skb->ipvs_property)
return NF_ACCEPT;
iph = skb->nh.iph;
@@ -821,7 +822,7 @@ ip_vs_out(unsigned int hooknum, struct sk_buff **pskb,
ip_vs_set_state(cp, IP_VS_DIR_OUTPUT, skb, pp);
ip_vs_conn_put(cp);
- skb->nfcache |= NFC_IPVS_PROPERTY;
+ skb->ipvs_property = 1;
LeaveFunction(11);
return NF_ACCEPT;
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
index 7d99ede2ef79..2d66848e7aa0 100644
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ b/net/ipv4/ipvs/ip_vs_ctl.c
@@ -1598,7 +1598,7 @@ static ctl_table vs_table[] = {
{ .ctl_name = 0 }
};
-static ctl_table ipv4_table[] = {
+static ctl_table ipvs_ipv4_table[] = {
{
.ctl_name = NET_IPV4,
.procname = "ipv4",
@@ -1613,7 +1613,7 @@ static ctl_table vs_root_table[] = {
.ctl_name = CTL_NET,
.procname = "net",
.mode = 0555,
- .child = ipv4_table,
+ .child = ipvs_ipv4_table,
},
{ .ctl_name = 0 }
};
diff --git a/net/ipv4/ipvs/ip_vs_lblc.c b/net/ipv4/ipvs/ip_vs_lblc.c
index c035838b780a..561cda326fa8 100644
--- a/net/ipv4/ipvs/ip_vs_lblc.c
+++ b/net/ipv4/ipvs/ip_vs_lblc.c
@@ -131,7 +131,7 @@ static ctl_table vs_table[] = {
{ .ctl_name = 0 }
};
-static ctl_table ipv4_table[] = {
+static ctl_table ipvs_ipv4_table[] = {
{
.ctl_name = NET_IPV4,
.procname = "ipv4",
@@ -146,7 +146,7 @@ static ctl_table lblc_root_table[] = {
.ctl_name = CTL_NET,
.procname = "net",
.mode = 0555,
- .child = ipv4_table
+ .child = ipvs_ipv4_table
},
{ .ctl_name = 0 }
};
diff --git a/net/ipv4/ipvs/ip_vs_lblcr.c b/net/ipv4/ipvs/ip_vs_lblcr.c
index 22b5dd55d271..ce456dbf09a5 100644
--- a/net/ipv4/ipvs/ip_vs_lblcr.c
+++ b/net/ipv4/ipvs/ip_vs_lblcr.c
@@ -320,7 +320,7 @@ static ctl_table vs_table[] = {
{ .ctl_name = 0 }
};
-static ctl_table ipv4_table[] = {
+static ctl_table ipvs_ipv4_table[] = {
{
.ctl_name = NET_IPV4,
.procname = "ipv4",
@@ -335,7 +335,7 @@ static ctl_table lblcr_root_table[] = {
.ctl_name = CTL_NET,
.procname = "net",
.mode = 0555,
- .child = ipv4_table
+ .child = ipvs_ipv4_table
},
{ .ctl_name = 0 }
};
diff --git a/net/ipv4/ipvs/ip_vs_proto_tcp.c b/net/ipv4/ipvs/ip_vs_proto_tcp.c
index e65de675da74..c19408973c09 100644
--- a/net/ipv4/ipvs/ip_vs_proto_tcp.c
+++ b/net/ipv4/ipvs/ip_vs_proto_tcp.c
@@ -604,14 +604,14 @@ void ip_vs_tcp_conn_listen(struct ip_vs_conn *cp)
}
-static void tcp_init(struct ip_vs_protocol *pp)
+static void ip_vs_tcp_init(struct ip_vs_protocol *pp)
{
IP_VS_INIT_HASH_TABLE(tcp_apps);
pp->timeout_table = tcp_timeouts;
}
-static void tcp_exit(struct ip_vs_protocol *pp)
+static void ip_vs_tcp_exit(struct ip_vs_protocol *pp)
{
}
@@ -621,8 +621,8 @@ struct ip_vs_protocol ip_vs_protocol_tcp = {
.protocol = IPPROTO_TCP,
.dont_defrag = 0,
.appcnt = ATOMIC_INIT(0),
- .init = tcp_init,
- .exit = tcp_exit,
+ .init = ip_vs_tcp_init,
+ .exit = ip_vs_tcp_exit,
.register_app = tcp_register_app,
.unregister_app = tcp_unregister_app,
.conn_schedule = tcp_conn_schedule,
diff --git a/net/ipv4/ipvs/ip_vs_xmit.c b/net/ipv4/ipvs/ip_vs_xmit.c
index a8512a3fd08a..3b87482049cf 100644
--- a/net/ipv4/ipvs/ip_vs_xmit.c
+++ b/net/ipv4/ipvs/ip_vs_xmit.c
@@ -127,7 +127,7 @@ ip_vs_dst_reset(struct ip_vs_dest *dest)
#define IP_VS_XMIT(skb, rt) \
do { \
- (skb)->nfcache |= NFC_IPVS_PROPERTY; \
+ (skb)->ipvs_property = 1; \
(skb)->ip_summed = CHECKSUM_NONE; \
NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, (skb), NULL, \
(rt)->u.dst.dev, dst_output); \
diff --git a/net/ipv4/multipath_drr.c b/net/ipv4/multipath_drr.c
index c9cf8726051d..db67373f9b34 100644
--- a/net/ipv4/multipath_drr.c
+++ b/net/ipv4/multipath_drr.c
@@ -107,7 +107,7 @@ static int drr_dev_event(struct notifier_block *this,
return NOTIFY_DONE;
}
-struct notifier_block drr_dev_notifier = {
+static struct notifier_block drr_dev_notifier = {
.notifier_call = drr_dev_event,
};
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
new file mode 100644
index 000000000000..ae0779d82c5d
--- /dev/null
+++ b/net/ipv4/netfilter.c
@@ -0,0 +1,139 @@
+/* IPv4 specific functions of netfilter core */
+
+#include <linux/config.h>
+#ifdef CONFIG_NETFILTER
+
+#include <linux/kernel.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <net/route.h>
+#include <linux/ip.h>
+
+/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
+int ip_route_me_harder(struct sk_buff **pskb)
+{
+ struct iphdr *iph = (*pskb)->nh.iph;
+ struct rtable *rt;
+ struct flowi fl = {};
+ struct dst_entry *odst;
+ unsigned int hh_len;
+
+ /* some non-standard hacks like ipt_REJECT.c:send_reset() can cause
+ * packets with foreign saddr to appear on the NF_IP_LOCAL_OUT hook.
+ */
+ if (inet_addr_type(iph->saddr) == RTN_LOCAL) {
+ fl.nl_u.ip4_u.daddr = iph->daddr;
+ fl.nl_u.ip4_u.saddr = iph->saddr;
+ fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
+ fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0;
+#ifdef CONFIG_IP_ROUTE_FWMARK
+ fl.nl_u.ip4_u.fwmark = (*pskb)->nfmark;
+#endif
+ fl.proto = iph->protocol;
+ if (ip_route_output_key(&rt, &fl) != 0)
+ return -1;
+
+ /* Drop old route. */
+ dst_release((*pskb)->dst);
+ (*pskb)->dst = &rt->u.dst;
+ } else {
+ /* non-local src, find valid iif to satisfy
+ * rp-filter when calling ip_route_input. */
+ fl.nl_u.ip4_u.daddr = iph->saddr;
+ if (ip_route_output_key(&rt, &fl) != 0)
+ return -1;
+
+ odst = (*pskb)->dst;
+ if (ip_route_input(*pskb, iph->daddr, iph->saddr,
+ RT_TOS(iph->tos), rt->u.dst.dev) != 0) {
+ dst_release(&rt->u.dst);
+ return -1;
+ }
+ dst_release(&rt->u.dst);
+ dst_release(odst);
+ }
+
+ if ((*pskb)->dst->error)
+ return -1;
+
+ /* Change in oif may mean change in hh_len. */
+ hh_len = (*pskb)->dst->dev->hard_header_len;
+ if (skb_headroom(*pskb) < hh_len) {
+ struct sk_buff *nskb;
+
+ nskb = skb_realloc_headroom(*pskb, hh_len);
+ if (!nskb)
+ return -1;
+ if ((*pskb)->sk)
+ skb_set_owner_w(nskb, (*pskb)->sk);
+ kfree_skb(*pskb);
+ *pskb = nskb;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(ip_route_me_harder);
+
+/*
+ * Extra routing may needed on local out, as the QUEUE target never
+ * returns control to the table.
+ */
+
+struct ip_rt_info {
+ u_int32_t daddr;
+ u_int32_t saddr;
+ u_int8_t tos;
+};
+
+static void queue_save(const struct sk_buff *skb, struct nf_info *info)
+{
+ struct ip_rt_info *rt_info = nf_info_reroute(info);
+
+ if (info->hook == NF_IP_LOCAL_OUT) {
+ const struct iphdr *iph = skb->nh.iph;
+
+ rt_info->tos = iph->tos;
+ rt_info->daddr = iph->daddr;
+ rt_info->saddr = iph->saddr;
+ }
+}
+
+static int queue_reroute(struct sk_buff **pskb, const struct nf_info *info)
+{
+ const struct ip_rt_info *rt_info = nf_info_reroute(info);
+
+ if (info->hook == NF_IP_LOCAL_OUT) {
+ struct iphdr *iph = (*pskb)->nh.iph;
+
+ if (!(iph->tos == rt_info->tos
+ && iph->daddr == rt_info->daddr
+ && iph->saddr == rt_info->saddr))
+ return ip_route_me_harder(pskb);
+ }
+ return 0;
+}
+
+static struct nf_queue_rerouter ip_reroute = {
+ .rer_size = sizeof(struct ip_rt_info),
+ .save = queue_save,
+ .reroute = queue_reroute,
+};
+
+static int init(void)
+{
+ return nf_register_queue_rerouter(PF_INET, &ip_reroute);
+}
+
+static void fini(void)
+{
+ nf_unregister_queue_rerouter(PF_INET);
+}
+
+module_init(init);
+module_exit(fini);
+
+#endif /* CONFIG_NETFILTER */
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 46d4cb1c06f0..e046f5521814 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -40,6 +40,16 @@ config IP_NF_CONNTRACK_MARK
of packets, but this mark value is kept in the conntrack session
instead of the individual packets.
+config IP_NF_CONNTRACK_EVENTS
+ bool "Connection tracking events"
+ depends on IP_NF_CONNTRACK
+ help
+ If this option is enabled, the connection tracking code will
+ provide a notifier chain that can be used by other kernel code
+ to get notified about changes in the connection tracking state.
+
+ IF unsure, say `N'.
+
config IP_NF_CT_PROTO_SCTP
tristate 'SCTP protocol connection tracking support (EXPERIMENTAL)'
depends on IP_NF_CONNTRACK && EXPERIMENTAL
@@ -100,11 +110,15 @@ config IP_NF_AMANDA
To compile it as a module, choose M here. If unsure, say Y.
config IP_NF_QUEUE
- tristate "Userspace queueing via NETLINK"
+ tristate "IP Userspace queueing via NETLINK (OBSOLETE)"
help
Netfilter has the ability to queue packets to user space: the
netlink device can be used to access them using this driver.
+ This option enables the old IPv4-only "ip_queue" implementation
+ which has been obsoleted by the new "nfnetlink_queue" code (see
+ CONFIG_NETFILTER_NETLINK_QUEUE).
+
To compile it as a module, choose M here. If unsure, say N.
config IP_NF_IPTABLES
@@ -340,6 +354,17 @@ config IP_NF_MATCH_SCTP
If you want to compile it as a module, say M here and read
<file:Documentation/modules.txt>. If unsure, say `N'.
+config IP_NF_MATCH_DCCP
+ tristate 'DCCP protocol match support'
+ depends on IP_NF_IPTABLES
+ help
+ With this option enabled, you will be able to use the iptables
+ `dccp' match in order to match on DCCP source/destination ports
+ and DCCP flags.
+
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
config IP_NF_MATCH_COMMENT
tristate 'comment match support'
depends on IP_NF_IPTABLES
@@ -361,6 +386,16 @@ config IP_NF_MATCH_CONNMARK
<file:Documentation/modules.txt>. The module will be called
ipt_connmark.o. If unsure, say `N'.
+config IP_NF_MATCH_CONNBYTES
+ tristate 'Connection byte/packet counter match support'
+ depends on IP_NF_CT_ACCT && IP_NF_IPTABLES
+ help
+ This option adds a `connbytes' match, which allows you to match the
+ number of bytes and/or packets for each direction within a connection.
+
+ If you want to compile it as a module, say M here and read
+ <file:Documentation/modules.txt>. If unsure, say `N'.
+
config IP_NF_MATCH_HASHLIMIT
tristate 'hashlimit match support'
depends on IP_NF_IPTABLES
@@ -375,6 +410,19 @@ config IP_NF_MATCH_HASHLIMIT
destination IP' or `500pps from any given source IP' with a single
IPtables rule.
+config IP_NF_MATCH_STRING
+ tristate 'string match support'
+ depends on IP_NF_IPTABLES
+ select TEXTSEARCH
+ select TEXTSEARCH_KMP
+ select TEXTSEARCH_BM
+ select TEXTSEARCH_FSM
+ help
+ This option adds a `string' match, which allows you to look for
+ pattern matchings in packets.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
# `filter', generic and specific targets
config IP_NF_FILTER
tristate "Packet filtering"
@@ -616,6 +664,20 @@ config IP_NF_TARGET_CLASSIFY
To compile it as a module, choose M here. If unsure, say N.
+config IP_NF_TARGET_TTL
+ tristate 'TTL target support'
+ depends on IP_NF_MANGLE
+ help
+ This option adds a `TTL' target, which enables the user to modify
+ the TTL value of the IP header.
+
+ While it is safe to decrement/lower the TTL, this target also enables
+ functionality to increment and set the TTL value of the IP header to
+ arbitrary values. This is EXTREMELY DANGEROUS since you can easily
+ create immortal packets that loop forever on the network.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config IP_NF_TARGET_CONNMARK
tristate 'CONNMARK target support'
depends on IP_NF_CONNTRACK_MARK && IP_NF_MANGLE
@@ -692,5 +754,11 @@ config IP_NF_ARP_MANGLE
Allows altering the ARP packet payload: source and destination
hardware and network addresses.
+config IP_NF_CONNTRACK_NETLINK
+ tristate 'Connection tracking netlink interface'
+ depends on IP_NF_CONNTRACK && NETFILTER_NETLINK
+ help
+ This option enables support for a netlink-based userspace interface
+
endmenu
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 45796d5924dd..a7bd38f50522 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -9,6 +9,10 @@ iptable_nat-objs := ip_nat_standalone.o ip_nat_rule.o ip_nat_core.o ip_nat_helpe
# connection tracking
obj-$(CONFIG_IP_NF_CONNTRACK) += ip_conntrack.o
+# conntrack netlink interface
+obj-$(CONFIG_IP_NF_CONNTRACK_NETLINK) += ip_conntrack_netlink.o
+
+
# SCTP protocol connection tracking
obj-$(CONFIG_IP_NF_CT_PROTO_SCTP) += ip_conntrack_proto_sctp.o
@@ -38,6 +42,7 @@ obj-$(CONFIG_IP_NF_MATCH_HELPER) += ipt_helper.o
obj-$(CONFIG_IP_NF_MATCH_LIMIT) += ipt_limit.o
obj-$(CONFIG_IP_NF_MATCH_HASHLIMIT) += ipt_hashlimit.o
obj-$(CONFIG_IP_NF_MATCH_SCTP) += ipt_sctp.o
+obj-$(CONFIG_IP_NF_MATCH_DCCP) += ipt_dccp.o
obj-$(CONFIG_IP_NF_MATCH_MARK) += ipt_mark.o
obj-$(CONFIG_IP_NF_MATCH_MAC) += ipt_mac.o
obj-$(CONFIG_IP_NF_MATCH_IPRANGE) += ipt_iprange.o
@@ -54,11 +59,13 @@ obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_STATE) += ipt_state.o
obj-$(CONFIG_IP_NF_MATCH_CONNMARK) += ipt_connmark.o
obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o
+obj-$(CONFIG_IP_NF_MATCH_CONNBYTES) += ipt_connbytes.o
obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
obj-$(CONFIG_IP_NF_MATCH_REALM) += ipt_realm.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
obj-$(CONFIG_IP_NF_MATCH_PHYSDEV) += ipt_physdev.o
obj-$(CONFIG_IP_NF_MATCH_COMMENT) += ipt_comment.o
+obj-$(CONFIG_IP_NF_MATCH_STRING) += ipt_string.o
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
@@ -78,6 +85,7 @@ obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS.o
obj-$(CONFIG_IP_NF_TARGET_NOTRACK) += ipt_NOTRACK.o
obj-$(CONFIG_IP_NF_TARGET_CLUSTERIP) += ipt_CLUSTERIP.o
+obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
# generic ARP tables
obj-$(CONFIG_IP_NF_ARPTABLES) += arp_tables.o
@@ -87,3 +95,4 @@ obj-$(CONFIG_IP_NF_ARP_MANGLE) += arpt_mangle.o
obj-$(CONFIG_IP_NF_ARPFILTER) += arptable_filter.o
obj-$(CONFIG_IP_NF_QUEUE) += ip_queue.o
+obj-$(CONFIG_NETFILTER_NETLINK_QUEUE) += ipt_NFQUEUE.o
diff --git a/net/ipv4/netfilter/ip_conntrack_amanda.c b/net/ipv4/netfilter/ip_conntrack_amanda.c
index 01e1b58322a9..be4c9eb3243f 100644
--- a/net/ipv4/netfilter/ip_conntrack_amanda.c
+++ b/net/ipv4/netfilter/ip_conntrack_amanda.c
@@ -40,7 +40,7 @@ MODULE_PARM_DESC(master_timeout, "timeout for the master connection");
static char *conns[] = { "DATA ", "MESG ", "INDEX " };
/* This is slow, but it's simple. --RR */
-static char amanda_buffer[65536];
+static char *amanda_buffer;
static DEFINE_SPINLOCK(amanda_buffer_lock);
unsigned int (*ip_nat_amanda_hook)(struct sk_buff **pskb,
@@ -153,11 +153,25 @@ static struct ip_conntrack_helper amanda_helper = {
static void __exit fini(void)
{
ip_conntrack_helper_unregister(&amanda_helper);
+ kfree(amanda_buffer);
}
static int __init init(void)
{
- return ip_conntrack_helper_register(&amanda_helper);
+ int ret;
+
+ amanda_buffer = kmalloc(65536, GFP_KERNEL);
+ if (!amanda_buffer)
+ return -ENOMEM;
+
+ ret = ip_conntrack_helper_register(&amanda_helper);
+ if (ret < 0) {
+ kfree(amanda_buffer);
+ return ret;
+ }
+ return 0;
+
+
}
module_init(init);
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c
index a7f0c821a9b2..a0648600190e 100644
--- a/net/ipv4/netfilter/ip_conntrack_core.c
+++ b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -37,6 +37,7 @@
#include <linux/err.h>
#include <linux/percpu.h>
#include <linux/moduleparam.h>
+#include <linux/notifier.h>
/* ip_conntrack_lock protects the main hash table, protocol/helper/expected
registrations, conntrack timers*/
@@ -49,7 +50,7 @@
#include <linux/netfilter_ipv4/ip_conntrack_core.h>
#include <linux/netfilter_ipv4/listhelp.h>
-#define IP_CONNTRACK_VERSION "2.1"
+#define IP_CONNTRACK_VERSION "2.3"
#if 0
#define DEBUGP printk
@@ -69,22 +70,81 @@ static LIST_HEAD(helpers);
unsigned int ip_conntrack_htable_size = 0;
int ip_conntrack_max;
struct list_head *ip_conntrack_hash;
-static kmem_cache_t *ip_conntrack_cachep;
-static kmem_cache_t *ip_conntrack_expect_cachep;
+static kmem_cache_t *ip_conntrack_cachep __read_mostly;
+static kmem_cache_t *ip_conntrack_expect_cachep __read_mostly;
struct ip_conntrack ip_conntrack_untracked;
unsigned int ip_ct_log_invalid;
static LIST_HEAD(unconfirmed);
static int ip_conntrack_vmalloc;
-DEFINE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
+static unsigned int ip_conntrack_next_id = 1;
+static unsigned int ip_conntrack_expect_next_id = 1;
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+struct notifier_block *ip_conntrack_chain;
+struct notifier_block *ip_conntrack_expect_chain;
+
+DEFINE_PER_CPU(struct ip_conntrack_ecache, ip_conntrack_ecache);
-void
-ip_conntrack_put(struct ip_conntrack *ct)
+/* deliver cached events and clear cache entry - must be called with locally
+ * disabled softirqs */
+static inline void
+__ip_ct_deliver_cached_events(struct ip_conntrack_ecache *ecache)
{
- IP_NF_ASSERT(ct);
- nf_conntrack_put(&ct->ct_general);
+ DEBUGP("ecache: delivering events for %p\n", ecache->ct);
+ if (is_confirmed(ecache->ct) && !is_dying(ecache->ct) && ecache->events)
+ notifier_call_chain(&ip_conntrack_chain, ecache->events,
+ ecache->ct);
+ ecache->events = 0;
+ ip_conntrack_put(ecache->ct);
+ ecache->ct = NULL;
}
+/* Deliver all cached events for a particular conntrack. This is called
+ * by code prior to async packet handling or freeing the skb */
+void ip_ct_deliver_cached_events(const struct ip_conntrack *ct)
+{
+ struct ip_conntrack_ecache *ecache;
+
+ local_bh_disable();
+ ecache = &__get_cpu_var(ip_conntrack_ecache);
+ if (ecache->ct == ct)
+ __ip_ct_deliver_cached_events(ecache);
+ local_bh_enable();
+}
+
+void __ip_ct_event_cache_init(struct ip_conntrack *ct)
+{
+ struct ip_conntrack_ecache *ecache;
+
+ /* take care of delivering potentially old events */
+ ecache = &__get_cpu_var(ip_conntrack_ecache);
+ BUG_ON(ecache->ct == ct);
+ if (ecache->ct)
+ __ip_ct_deliver_cached_events(ecache);
+ /* initialize for this conntrack/packet */
+ ecache->ct = ct;
+ nf_conntrack_get(&ct->ct_general);
+}
+
+/* flush the event cache - touches other CPU's data and must not be called while
+ * packets are still passing through the code */
+static void ip_ct_event_cache_flush(void)
+{
+ struct ip_conntrack_ecache *ecache;
+ int cpu;
+
+ for_each_cpu(cpu) {
+ ecache = &per_cpu(ip_conntrack_ecache, cpu);
+ if (ecache->ct)
+ ip_conntrack_put(ecache->ct);
+ }
+}
+#else
+static inline void ip_ct_event_cache_flush(void) {}
+#endif /* CONFIG_IP_NF_CONNTRACK_EVENTS */
+
+DEFINE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
+
static int ip_conntrack_hash_rnd_initted;
static unsigned int ip_conntrack_hash_rnd;
@@ -144,6 +204,13 @@ static void unlink_expect(struct ip_conntrack_expect *exp)
list_del(&exp->list);
CONNTRACK_STAT_INC(expect_delete);
exp->master->expecting--;
+ ip_conntrack_expect_put(exp);
+}
+
+void __ip_ct_expect_unlink_destroy(struct ip_conntrack_expect *exp)
+{
+ unlink_expect(exp);
+ ip_conntrack_expect_put(exp);
}
static void expectation_timed_out(unsigned long ul_expect)
@@ -156,6 +223,33 @@ static void expectation_timed_out(unsigned long ul_expect)
ip_conntrack_expect_put(exp);
}
+struct ip_conntrack_expect *
+__ip_conntrack_expect_find(const struct ip_conntrack_tuple *tuple)
+{
+ struct ip_conntrack_expect *i;
+
+ list_for_each_entry(i, &ip_conntrack_expect_list, list) {
+ if (ip_ct_tuple_mask_cmp(tuple, &i->tuple, &i->mask)) {
+ atomic_inc(&i->use);
+ return i;
+ }
+ }
+ return NULL;
+}
+
+/* Just find a expectation corresponding to a tuple. */
+struct ip_conntrack_expect *
+ip_conntrack_expect_find_get(const struct ip_conntrack_tuple *tuple)
+{
+ struct ip_conntrack_expect *i;
+
+ read_lock_bh(&ip_conntrack_lock);
+ i = __ip_conntrack_expect_find(tuple);
+ read_unlock_bh(&ip_conntrack_lock);
+
+ return i;
+}
+
/* If an expectation for this connection is found, it gets delete from
* global list then returned. */
static struct ip_conntrack_expect *
@@ -180,7 +274,7 @@ find_expectation(const struct ip_conntrack_tuple *tuple)
}
/* delete all expectations for this conntrack */
-static void remove_expectations(struct ip_conntrack *ct)
+void ip_ct_remove_expectations(struct ip_conntrack *ct)
{
struct ip_conntrack_expect *i, *tmp;
@@ -210,7 +304,7 @@ clean_from_lists(struct ip_conntrack *ct)
LIST_DELETE(&ip_conntrack_hash[hr], &ct->tuplehash[IP_CT_DIR_REPLY]);
/* Destroy all pending expectations */
- remove_expectations(ct);
+ ip_ct_remove_expectations(ct);
}
static void
@@ -223,10 +317,13 @@ destroy_conntrack(struct nf_conntrack *nfct)
IP_NF_ASSERT(atomic_read(&nfct->use) == 0);
IP_NF_ASSERT(!timer_pending(&ct->timeout));
+ ip_conntrack_event(IPCT_DESTROY, ct);
+ set_bit(IPS_DYING_BIT, &ct->status);
+
/* To make sure we don't get any weird locking issues here:
* destroy_conntrack() MUST NOT be called with a write lock
* to ip_conntrack_lock!!! -HW */
- proto = ip_ct_find_proto(ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.protonum);
+ proto = __ip_conntrack_proto_find(ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.protonum);
if (proto && proto->destroy)
proto->destroy(ct);
@@ -238,7 +335,7 @@ destroy_conntrack(struct nf_conntrack *nfct)
* except TFTP can create an expectation on the first packet,
* before connection is in the list, so we need to clean here,
* too. */
- remove_expectations(ct);
+ ip_ct_remove_expectations(ct);
/* We overload first tuple to link into unconfirmed list. */
if (!is_confirmed(ct)) {
@@ -253,8 +350,7 @@ destroy_conntrack(struct nf_conntrack *nfct)
ip_conntrack_put(ct->master);
DEBUGP("destroy_conntrack: returning ct=%p to slab\n", ct);
- kmem_cache_free(ip_conntrack_cachep, ct);
- atomic_dec(&ip_conntrack_count);
+ ip_conntrack_free(ct);
}
static void death_by_timeout(unsigned long ul_conntrack)
@@ -280,7 +376,7 @@ conntrack_tuple_cmp(const struct ip_conntrack_tuple_hash *i,
&& ip_ct_tuple_equal(tuple, &i->tuple);
}
-static struct ip_conntrack_tuple_hash *
+struct ip_conntrack_tuple_hash *
__ip_conntrack_find(const struct ip_conntrack_tuple *tuple,
const struct ip_conntrack *ignored_conntrack)
{
@@ -315,6 +411,29 @@ ip_conntrack_find_get(const struct ip_conntrack_tuple *tuple,
return h;
}
+static void __ip_conntrack_hash_insert(struct ip_conntrack *ct,
+ unsigned int hash,
+ unsigned int repl_hash)
+{
+ ct->id = ++ip_conntrack_next_id;
+ list_prepend(&ip_conntrack_hash[hash],
+ &ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
+ list_prepend(&ip_conntrack_hash[repl_hash],
+ &ct->tuplehash[IP_CT_DIR_REPLY].list);
+}
+
+void ip_conntrack_hash_insert(struct ip_conntrack *ct)
+{
+ unsigned int hash, repl_hash;
+
+ hash = hash_conntrack(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
+ repl_hash = hash_conntrack(&ct->tuplehash[IP_CT_DIR_REPLY].tuple);
+
+ write_lock_bh(&ip_conntrack_lock);
+ __ip_conntrack_hash_insert(ct, hash, repl_hash);
+ write_unlock_bh(&ip_conntrack_lock);
+}
+
/* Confirm a connection given skb; places it in hash table */
int
__ip_conntrack_confirm(struct sk_buff **pskb)
@@ -361,10 +480,7 @@ __ip_conntrack_confirm(struct sk_buff **pskb)
/* Remove from unconfirmed list */
list_del(&ct->tuplehash[IP_CT_DIR_ORIGINAL].list);
- list_prepend(&ip_conntrack_hash[hash],
- &ct->tuplehash[IP_CT_DIR_ORIGINAL]);
- list_prepend(&ip_conntrack_hash[repl_hash],
- &ct->tuplehash[IP_CT_DIR_REPLY]);
+ __ip_conntrack_hash_insert(ct, hash, repl_hash);
/* Timer relative to confirmation time, not original
setting time, otherwise we'd get timer wrap in
weird delay cases. */
@@ -374,6 +490,16 @@ __ip_conntrack_confirm(struct sk_buff **pskb)
set_bit(IPS_CONFIRMED_BIT, &ct->status);
CONNTRACK_STAT_INC(insert);
write_unlock_bh(&ip_conntrack_lock);
+ if (ct->helper)
+ ip_conntrack_event_cache(IPCT_HELPER, *pskb);
+#ifdef CONFIG_IP_NF_NAT_NEEDED
+ if (test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status) ||
+ test_bit(IPS_DST_NAT_DONE_BIT, &ct->status))
+ ip_conntrack_event_cache(IPCT_NATINFO, *pskb);
+#endif
+ ip_conntrack_event_cache(master_ct(ct) ?
+ IPCT_RELATED : IPCT_NEW, *pskb);
+
return NF_ACCEPT;
}
@@ -438,34 +564,84 @@ static inline int helper_cmp(const struct ip_conntrack_helper *i,
return ip_ct_tuple_mask_cmp(rtuple, &i->tuple, &i->mask);
}
-static struct ip_conntrack_helper *ip_ct_find_helper(const struct ip_conntrack_tuple *tuple)
+static struct ip_conntrack_helper *
+__ip_conntrack_helper_find( const struct ip_conntrack_tuple *tuple)
{
return LIST_FIND(&helpers, helper_cmp,
struct ip_conntrack_helper *,
tuple);
}
-/* Allocate a new conntrack: we return -ENOMEM if classification
- failed due to stress. Otherwise it really is unclassifiable. */
-static struct ip_conntrack_tuple_hash *
-init_conntrack(const struct ip_conntrack_tuple *tuple,
- struct ip_conntrack_protocol *protocol,
- struct sk_buff *skb)
+struct ip_conntrack_helper *
+ip_conntrack_helper_find_get( const struct ip_conntrack_tuple *tuple)
+{
+ struct ip_conntrack_helper *helper;
+
+ /* need ip_conntrack_lock to assure that helper exists until
+ * try_module_get() is called */
+ read_lock_bh(&ip_conntrack_lock);
+
+ helper = __ip_conntrack_helper_find(tuple);
+ if (helper) {
+ /* need to increase module usage count to assure helper will
+ * not go away while the caller is e.g. busy putting a
+ * conntrack in the hash that uses the helper */
+ if (!try_module_get(helper->me))
+ helper = NULL;
+ }
+
+ read_unlock_bh(&ip_conntrack_lock);
+
+ return helper;
+}
+
+void ip_conntrack_helper_put(struct ip_conntrack_helper *helper)
+{
+ module_put(helper->me);
+}
+
+struct ip_conntrack_protocol *
+__ip_conntrack_proto_find(u_int8_t protocol)
+{
+ return ip_ct_protos[protocol];
+}
+
+/* this is guaranteed to always return a valid protocol helper, since
+ * it falls back to generic_protocol */
+struct ip_conntrack_protocol *
+ip_conntrack_proto_find_get(u_int8_t protocol)
+{
+ struct ip_conntrack_protocol *p;
+
+ preempt_disable();
+ p = __ip_conntrack_proto_find(protocol);
+ if (p) {
+ if (!try_module_get(p->me))
+ p = &ip_conntrack_generic_protocol;
+ }
+ preempt_enable();
+
+ return p;
+}
+
+void ip_conntrack_proto_put(struct ip_conntrack_protocol *p)
+{
+ module_put(p->me);
+}
+
+struct ip_conntrack *ip_conntrack_alloc(struct ip_conntrack_tuple *orig,
+ struct ip_conntrack_tuple *repl)
{
struct ip_conntrack *conntrack;
- struct ip_conntrack_tuple repl_tuple;
- size_t hash;
- struct ip_conntrack_expect *exp;
if (!ip_conntrack_hash_rnd_initted) {
get_random_bytes(&ip_conntrack_hash_rnd, 4);
ip_conntrack_hash_rnd_initted = 1;
}
- hash = hash_conntrack(tuple);
-
if (ip_conntrack_max
&& atomic_read(&ip_conntrack_count) >= ip_conntrack_max) {
+ unsigned int hash = hash_conntrack(orig);
/* Try dropping from this hash chain. */
if (!early_drop(&ip_conntrack_hash[hash])) {
if (net_ratelimit())
@@ -476,11 +652,6 @@ init_conntrack(const struct ip_conntrack_tuple *tuple,
}
}
- if (!ip_ct_invert_tuple(&repl_tuple, tuple, protocol)) {
- DEBUGP("Can't invert tuple.\n");
- return NULL;
- }
-
conntrack = kmem_cache_alloc(ip_conntrack_cachep, GFP_ATOMIC);
if (!conntrack) {
DEBUGP("Can't allocate conntrack.\n");
@@ -490,17 +661,50 @@ init_conntrack(const struct ip_conntrack_tuple *tuple,
memset(conntrack, 0, sizeof(*conntrack));
atomic_set(&conntrack->ct_general.use, 1);
conntrack->ct_general.destroy = destroy_conntrack;
- conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *tuple;
- conntrack->tuplehash[IP_CT_DIR_REPLY].tuple = repl_tuple;
- if (!protocol->new(conntrack, skb)) {
- kmem_cache_free(ip_conntrack_cachep, conntrack);
- return NULL;
- }
+ conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple = *orig;
+ conntrack->tuplehash[IP_CT_DIR_REPLY].tuple = *repl;
/* Don't set timer yet: wait for confirmation */
init_timer(&conntrack->timeout);
conntrack->timeout.data = (unsigned long)conntrack;
conntrack->timeout.function = death_by_timeout;
+ atomic_inc(&ip_conntrack_count);
+
+ return conntrack;
+}
+
+void
+ip_conntrack_free(struct ip_conntrack *conntrack)
+{
+ atomic_dec(&ip_conntrack_count);
+ kmem_cache_free(ip_conntrack_cachep, conntrack);
+}
+
+/* Allocate a new conntrack: we return -ENOMEM if classification
+ * failed due to stress. Otherwise it really is unclassifiable */
+static struct ip_conntrack_tuple_hash *
+init_conntrack(struct ip_conntrack_tuple *tuple,
+ struct ip_conntrack_protocol *protocol,
+ struct sk_buff *skb)
+{
+ struct ip_conntrack *conntrack;
+ struct ip_conntrack_tuple repl_tuple;
+ struct ip_conntrack_expect *exp;
+
+ if (!ip_ct_invert_tuple(&repl_tuple, tuple, protocol)) {
+ DEBUGP("Can't invert tuple.\n");
+ return NULL;
+ }
+
+ conntrack = ip_conntrack_alloc(tuple, &repl_tuple);
+ if (conntrack == NULL || IS_ERR(conntrack))
+ return (struct ip_conntrack_tuple_hash *)conntrack;
+
+ if (!protocol->new(conntrack, skb)) {
+ ip_conntrack_free(conntrack);
+ return NULL;
+ }
+
write_lock_bh(&ip_conntrack_lock);
exp = find_expectation(tuple);
@@ -521,7 +725,7 @@ init_conntrack(const struct ip_conntrack_tuple *tuple,
nf_conntrack_get(&conntrack->master->ct_general);
CONNTRACK_STAT_INC(expect_new);
} else {
- conntrack->helper = ip_ct_find_helper(&repl_tuple);
+ conntrack->helper = __ip_conntrack_helper_find(&repl_tuple);
CONNTRACK_STAT_INC(new);
}
@@ -529,7 +733,6 @@ init_conntrack(const struct ip_conntrack_tuple *tuple,
/* Overload tuple linked list to put us in unconfirmed list. */
list_add(&conntrack->tuplehash[IP_CT_DIR_ORIGINAL].list, &unconfirmed);
- atomic_inc(&ip_conntrack_count);
write_unlock_bh(&ip_conntrack_lock);
if (exp) {
@@ -607,7 +810,7 @@ unsigned int ip_conntrack_in(unsigned int hooknum,
struct ip_conntrack *ct;
enum ip_conntrack_info ctinfo;
struct ip_conntrack_protocol *proto;
- int set_reply;
+ int set_reply = 0;
int ret;
/* Previously seen (loopback or untracked)? Ignore. */
@@ -625,9 +828,6 @@ unsigned int ip_conntrack_in(unsigned int hooknum,
return NF_DROP;
}
- /* FIXME: Do this right please. --RR */
- (*pskb)->nfcache |= NFC_UNKNOWN;
-
/* Doesn't cover locally-generated broadcast, so not worth it. */
#if 0
/* Ignore broadcast: no `connection'. */
@@ -643,7 +843,7 @@ unsigned int ip_conntrack_in(unsigned int hooknum,
}
#endif
- proto = ip_ct_find_proto((*pskb)->nh.iph->protocol);
+ proto = __ip_conntrack_proto_find((*pskb)->nh.iph->protocol);
/* It may be an special packet, error, unclean...
* inverse of the return code tells to the netfilter
@@ -679,8 +879,8 @@ unsigned int ip_conntrack_in(unsigned int hooknum,
return -ret;
}
- if (set_reply)
- set_bit(IPS_SEEN_REPLY_BIT, &ct->status);
+ if (set_reply && !test_and_set_bit(IPS_SEEN_REPLY_BIT, &ct->status))
+ ip_conntrack_event_cache(IPCT_STATUS, *pskb);
return ret;
}
@@ -689,7 +889,7 @@ int invert_tuplepr(struct ip_conntrack_tuple *inverse,
const struct ip_conntrack_tuple *orig)
{
return ip_ct_invert_tuple(inverse, orig,
- ip_ct_find_proto(orig->dst.protonum));
+ __ip_conntrack_proto_find(orig->dst.protonum));
}
/* Would two expected things clash? */
@@ -769,6 +969,8 @@ static void ip_conntrack_expect_insert(struct ip_conntrack_expect *exp)
exp->timeout.expires = jiffies + exp->master->helper->timeout * HZ;
add_timer(&exp->timeout);
+ exp->id = ++ip_conntrack_expect_next_id;
+ atomic_inc(&exp->use);
CONNTRACK_STAT_INC(expect_create);
}
@@ -827,6 +1029,7 @@ int ip_conntrack_expect_related(struct ip_conntrack_expect *expect)
evict_oldest_expect(expect->master);
ip_conntrack_expect_insert(expect);
+ ip_conntrack_expect_event(IPEXP_NEW, expect);
ret = 0;
out:
write_unlock_bh(&ip_conntrack_lock);
@@ -847,7 +1050,7 @@ void ip_conntrack_alter_reply(struct ip_conntrack *conntrack,
conntrack->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply;
if (!conntrack->master && conntrack->expecting == 0)
- conntrack->helper = ip_ct_find_helper(newreply);
+ conntrack->helper = __ip_conntrack_helper_find(newreply);
write_unlock_bh(&ip_conntrack_lock);
}
@@ -861,11 +1064,26 @@ int ip_conntrack_helper_register(struct ip_conntrack_helper *me)
return 0;
}
+struct ip_conntrack_helper *
+__ip_conntrack_helper_find_byname(const char *name)
+{
+ struct ip_conntrack_helper *h;
+
+ list_for_each_entry(h, &helpers, list) {
+ if (!strcmp(h->name, name))
+ return h;
+ }
+
+ return NULL;
+}
+
static inline int unhelp(struct ip_conntrack_tuple_hash *i,
const struct ip_conntrack_helper *me)
{
- if (tuplehash_to_ctrack(i)->helper == me)
+ if (tuplehash_to_ctrack(i)->helper == me) {
+ ip_conntrack_event(IPCT_HELPER, tuplehash_to_ctrack(i));
tuplehash_to_ctrack(i)->helper = NULL;
+ }
return 0;
}
@@ -927,12 +1145,46 @@ void ip_ct_refresh_acct(struct ip_conntrack *ct,
if (del_timer(&ct->timeout)) {
ct->timeout.expires = jiffies + extra_jiffies;
add_timer(&ct->timeout);
+ ip_conntrack_event_cache(IPCT_REFRESH, skb);
}
ct_add_counters(ct, ctinfo, skb);
write_unlock_bh(&ip_conntrack_lock);
}
}
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+/* Generic function for tcp/udp/sctp/dccp and alike. This needs to be
+ * in ip_conntrack_core, since we don't want the protocols to autoload
+ * or depend on ctnetlink */
+int ip_ct_port_tuple_to_nfattr(struct sk_buff *skb,
+ const struct ip_conntrack_tuple *tuple)
+{
+ NFA_PUT(skb, CTA_PROTO_SRC_PORT, sizeof(u_int16_t),
+ &tuple->src.u.tcp.port);
+ NFA_PUT(skb, CTA_PROTO_DST_PORT, sizeof(u_int16_t),
+ &tuple->dst.u.tcp.port);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+int ip_ct_port_nfattr_to_tuple(struct nfattr *tb[],
+ struct ip_conntrack_tuple *t)
+{
+ if (!tb[CTA_PROTO_SRC_PORT-1] || !tb[CTA_PROTO_DST_PORT-1])
+ return -EINVAL;
+
+ t->src.u.tcp.port =
+ *(u_int16_t *)NFA_DATA(tb[CTA_PROTO_SRC_PORT-1]);
+ t->dst.u.tcp.port =
+ *(u_int16_t *)NFA_DATA(tb[CTA_PROTO_DST_PORT-1]);
+
+ return 0;
+}
+#endif
+
/* Returns new sk_buff, or NULL */
struct sk_buff *
ip_ct_gather_frags(struct sk_buff *skb, u_int32_t user)
@@ -943,10 +1195,8 @@ ip_ct_gather_frags(struct sk_buff *skb, u_int32_t user)
skb = ip_defrag(skb, user);
local_bh_enable();
- if (skb) {
+ if (skb)
ip_send_check(skb->nh.iph);
- skb->nfcache |= NFC_ALTERED;
- }
return skb;
}
@@ -1096,16 +1346,14 @@ static void free_conntrack_hash(void)
* ip_conntrack_htable_size));
}
-/* Mishearing the voices in his head, our hero wonders how he's
- supposed to kill the mall. */
-void ip_conntrack_cleanup(void)
+void ip_conntrack_flush()
{
- ip_ct_attach = NULL;
/* This makes sure all current packets have passed through
netfilter framework. Roll on, two-stage module
delete... */
synchronize_net();
-
+
+ ip_ct_event_cache_flush();
i_see_dead_people:
ip_ct_iterate_cleanup(kill_all, NULL);
if (atomic_read(&ip_conntrack_count) != 0) {
@@ -1115,7 +1363,14 @@ void ip_conntrack_cleanup(void)
/* wait until all references to ip_conntrack_untracked are dropped */
while (atomic_read(&ip_conntrack_untracked.ct_general.use) > 1)
schedule();
+}
+/* Mishearing the voices in his head, our hero wonders how he's
+ supposed to kill the mall. */
+void ip_conntrack_cleanup(void)
+{
+ ip_ct_attach = NULL;
+ ip_conntrack_flush();
kmem_cache_destroy(ip_conntrack_cachep);
kmem_cache_destroy(ip_conntrack_expect_cachep);
free_conntrack_hash();
diff --git a/net/ipv4/netfilter/ip_conntrack_ftp.c b/net/ipv4/netfilter/ip_conntrack_ftp.c
index 7a3b773be3f9..3a2627db1729 100644
--- a/net/ipv4/netfilter/ip_conntrack_ftp.c
+++ b/net/ipv4/netfilter/ip_conntrack_ftp.c
@@ -25,8 +25,7 @@ MODULE_AUTHOR("Rusty Russell <rusty@rustcorp.com.au>");
MODULE_DESCRIPTION("ftp connection tracking helper");
/* This is slow, but it's simple. --RR */
-static char ftp_buffer[65536];
-
+static char *ftp_buffer;
static DEFINE_SPINLOCK(ip_ftp_lock);
#define MAX_PORTS 8
@@ -262,7 +261,8 @@ static int find_nl_seq(u32 seq, const struct ip_ct_ftp_master *info, int dir)
}
/* We don't update if it's older than what we have. */
-static void update_nl_seq(u32 nl_seq, struct ip_ct_ftp_master *info, int dir)
+static void update_nl_seq(u32 nl_seq, struct ip_ct_ftp_master *info, int dir,
+ struct sk_buff *skb)
{
unsigned int i, oldest = NUM_SEQ_TO_REMEMBER;
@@ -276,10 +276,13 @@ static void update_nl_seq(u32 nl_seq, struct ip_ct_ftp_master *info, int dir)
oldest = i;
}
- if (info->seq_aft_nl_num[dir] < NUM_SEQ_TO_REMEMBER)
+ if (info->seq_aft_nl_num[dir] < NUM_SEQ_TO_REMEMBER) {
info->seq_aft_nl[dir][info->seq_aft_nl_num[dir]++] = nl_seq;
- else if (oldest != NUM_SEQ_TO_REMEMBER)
+ ip_conntrack_event_cache(IPCT_HELPINFO_VOLATILE, skb);
+ } else if (oldest != NUM_SEQ_TO_REMEMBER) {
info->seq_aft_nl[dir][oldest] = nl_seq;
+ ip_conntrack_event_cache(IPCT_HELPINFO_VOLATILE, skb);
+ }
}
static int help(struct sk_buff **pskb,
@@ -439,7 +442,7 @@ out_update_nl:
/* Now if this ends in \n, update ftp info. Seq may have been
* adjusted by NAT code. */
if (ends_in_nl)
- update_nl_seq(seq, ct_ftp_info,dir);
+ update_nl_seq(seq, ct_ftp_info,dir, *pskb);
out:
spin_unlock_bh(&ip_ftp_lock);
return ret;
@@ -457,6 +460,8 @@ static void fini(void)
ports[i]);
ip_conntrack_helper_unregister(&ftp[i]);
}
+
+ kfree(ftp_buffer);
}
static int __init init(void)
@@ -464,6 +469,10 @@ static int __init init(void)
int i, ret;
char *tmpname;
+ ftp_buffer = kmalloc(65536, GFP_KERNEL);
+ if (!ftp_buffer)
+ return -ENOMEM;
+
if (ports_c == 0)
ports[ports_c++] = FTP_PORT;
diff --git a/net/ipv4/netfilter/ip_conntrack_irc.c b/net/ipv4/netfilter/ip_conntrack_irc.c
index 4a28f297d502..25438eec21a1 100644
--- a/net/ipv4/netfilter/ip_conntrack_irc.c
+++ b/net/ipv4/netfilter/ip_conntrack_irc.c
@@ -39,7 +39,7 @@ static int ports_c;
static int max_dcc_channels = 8;
static unsigned int dcc_timeout = 300;
/* This is slow, but it's simple. --RR */
-static char irc_buffer[65536];
+static char *irc_buffer;
static DEFINE_SPINLOCK(irc_buffer_lock);
unsigned int (*ip_nat_irc_hook)(struct sk_buff **pskb,
@@ -257,6 +257,10 @@ static int __init init(void)
printk("ip_conntrack_irc: dcc_timeout must be a positive integer\n");
return -EBUSY;
}
+
+ irc_buffer = kmalloc(65536, GFP_KERNEL);
+ if (!irc_buffer)
+ return -ENOMEM;
/* If no port given, default to standard irc port */
if (ports_c == 0)
@@ -304,6 +308,7 @@ static void fini(void)
ports[i]);
ip_conntrack_helper_unregister(&irc_helpers[i]);
}
+ kfree(irc_buffer);
}
module_init(init);
diff --git a/net/ipv4/netfilter/ip_conntrack_netlink.c b/net/ipv4/netfilter/ip_conntrack_netlink.c
new file mode 100644
index 000000000000..a4e9278db4ed
--- /dev/null
+++ b/net/ipv4/netfilter/ip_conntrack_netlink.c
@@ -0,0 +1,1579 @@
+/* Connection tracking via netlink socket. Allows for user space
+ * protocol helpers and general trouble making from userspace.
+ *
+ * (C) 2001 by Jay Schulist <jschlst@samba.org>
+ * (C) 2002-2005 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2003 by Patrick Mchardy <kaber@trash.net>
+ * (C) 2005 by Pablo Neira Ayuso <pablo@eurodev.net>
+ *
+ * I've reworked this stuff to use attributes instead of conntrack
+ * structures. 5.44 am. I need more tea. --pablo 05/07/11.
+ *
+ * Initial connection tracking via netlink development funded and
+ * generally made possible by Network Robots, Inc. (www.networkrobots.com)
+ *
+ * Further development of this code funded by Astaro AG (http://www.astaro.com)
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/netlink.h>
+#include <linux/spinlock.h>
+#include <linux/notifier.h>
+#include <linux/rtnetlink.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+#include <linux/netfilter_ipv4/ip_conntrack_core.h>
+#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
+#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
+#include <linux/netfilter_ipv4/ip_nat_protocol.h>
+
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
+
+MODULE_LICENSE("GPL");
+
+static char __initdata version[] = "0.90";
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+
+static inline int
+ctnetlink_dump_tuples_proto(struct sk_buff *skb,
+ const struct ip_conntrack_tuple *tuple)
+{
+ struct ip_conntrack_protocol *proto;
+
+ NFA_PUT(skb, CTA_PROTO_NUM, sizeof(u_int8_t), &tuple->dst.protonum);
+
+ proto = ip_conntrack_proto_find_get(tuple->dst.protonum);
+ if (proto && proto->tuple_to_nfattr)
+ return proto->tuple_to_nfattr(skb, tuple);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_tuples(struct sk_buff *skb,
+ const struct ip_conntrack_tuple *tuple)
+{
+ struct nfattr *nest_parms;
+
+ nest_parms = NFA_NEST(skb, CTA_TUPLE_IP);
+ NFA_PUT(skb, CTA_IP_V4_SRC, sizeof(u_int32_t), &tuple->src.ip);
+ NFA_PUT(skb, CTA_IP_V4_DST, sizeof(u_int32_t), &tuple->dst.ip);
+ NFA_NEST_END(skb, nest_parms);
+
+ nest_parms = NFA_NEST(skb, CTA_TUPLE_PROTO);
+ ctnetlink_dump_tuples_proto(skb, tuple);
+ NFA_NEST_END(skb, nest_parms);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_status(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ u_int32_t status = htonl((u_int32_t) ct->status);
+ NFA_PUT(skb, CTA_STATUS, sizeof(status), &status);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_timeout(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ long timeout_l = ct->timeout.expires - jiffies;
+ u_int32_t timeout;
+
+ if (timeout_l < 0)
+ timeout = 0;
+ else
+ timeout = htonl(timeout_l / HZ);
+
+ NFA_PUT(skb, CTA_TIMEOUT, sizeof(timeout), &timeout);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_protoinfo(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ struct ip_conntrack_protocol *proto = ip_conntrack_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
+
+ struct nfattr *nest_proto;
+ int ret;
+
+ if (!proto || !proto->to_nfattr)
+ return 0;
+
+ nest_proto = NFA_NEST(skb, CTA_PROTOINFO);
+
+ ret = proto->to_nfattr(skb, nest_proto, ct);
+
+ ip_conntrack_proto_put(proto);
+
+ NFA_NEST_END(skb, nest_proto);
+
+ return ret;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_helpinfo(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ struct nfattr *nest_helper;
+
+ if (!ct->helper)
+ return 0;
+
+ nest_helper = NFA_NEST(skb, CTA_HELP);
+ NFA_PUT(skb, CTA_HELP_NAME, CTA_HELP_MAXNAMESIZE, &ct->helper->name);
+
+ if (ct->helper->to_nfattr)
+ ct->helper->to_nfattr(skb, ct);
+
+ NFA_NEST_END(skb, nest_helper);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+#ifdef CONFIG_IP_NF_CT_ACCT
+static inline int
+ctnetlink_dump_counters(struct sk_buff *skb, const struct ip_conntrack *ct,
+ enum ip_conntrack_dir dir)
+{
+ enum ctattr_type type = dir ? CTA_COUNTERS_REPLY: CTA_COUNTERS_ORIG;
+ struct nfattr *nest_count = NFA_NEST(skb, type);
+ u_int64_t tmp;
+
+ tmp = cpu_to_be64(ct->counters[dir].packets);
+ NFA_PUT(skb, CTA_COUNTERS_PACKETS, sizeof(u_int64_t), &tmp);
+
+ tmp = cpu_to_be64(ct->counters[dir].bytes);
+ NFA_PUT(skb, CTA_COUNTERS_BYTES, sizeof(u_int64_t), &tmp);
+
+ NFA_NEST_END(skb, nest_count);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+#else
+#define ctnetlink_dump_counters(a, b, c) (0)
+#endif
+
+#ifdef CONFIG_IP_NF_CONNTRACK_MARK
+static inline int
+ctnetlink_dump_mark(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ u_int32_t mark = htonl(ct->mark);
+
+ NFA_PUT(skb, CTA_MARK, sizeof(u_int32_t), &mark);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+#else
+#define ctnetlink_dump_mark(a, b) (0)
+#endif
+
+static inline int
+ctnetlink_dump_id(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ u_int32_t id = htonl(ct->id);
+ NFA_PUT(skb, CTA_ID, sizeof(u_int32_t), &id);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_dump_use(struct sk_buff *skb, const struct ip_conntrack *ct)
+{
+ unsigned int use = htonl(atomic_read(&ct->ct_general.use));
+
+ NFA_PUT(skb, CTA_USE, sizeof(u_int32_t), &use);
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+#define tuple(ct, dir) (&(ct)->tuplehash[dir].tuple)
+
+static int
+ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
+ int event, int nowait,
+ const struct ip_conntrack *ct)
+{
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+ struct nfattr *nest_parms;
+ unsigned char *b;
+
+ b = skb->tail;
+
+ event |= NFNL_SUBSYS_CTNETLINK << 8;
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
+ nfmsg = NLMSG_DATA(nlh);
+
+ nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0;
+ nfmsg->nfgen_family = AF_INET;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = 0;
+
+ nest_parms = NFA_NEST(skb, CTA_TUPLE_ORIG);
+ if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
+ goto nfattr_failure;
+ NFA_NEST_END(skb, nest_parms);
+
+ nest_parms = NFA_NEST(skb, CTA_TUPLE_REPLY);
+ if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0)
+ goto nfattr_failure;
+ NFA_NEST_END(skb, nest_parms);
+
+ if (ctnetlink_dump_status(skb, ct) < 0 ||
+ ctnetlink_dump_timeout(skb, ct) < 0 ||
+ ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
+ ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0 ||
+ ctnetlink_dump_protoinfo(skb, ct) < 0 ||
+ ctnetlink_dump_helpinfo(skb, ct) < 0 ||
+ ctnetlink_dump_mark(skb, ct) < 0 ||
+ ctnetlink_dump_id(skb, ct) < 0 ||
+ ctnetlink_dump_use(skb, ct) < 0)
+ goto nfattr_failure;
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+nfattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+static int ctnetlink_conntrack_event(struct notifier_block *this,
+ unsigned long events, void *ptr)
+{
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+ struct nfattr *nest_parms;
+ struct ip_conntrack *ct = (struct ip_conntrack *)ptr;
+ struct sk_buff *skb;
+ unsigned int type;
+ unsigned char *b;
+ unsigned int flags = 0, group;
+
+ /* ignore our fake conntrack entry */
+ if (ct == &ip_conntrack_untracked)
+ return NOTIFY_DONE;
+
+ if (events & IPCT_DESTROY) {
+ type = IPCTNL_MSG_CT_DELETE;
+ group = NFNLGRP_CONNTRACK_DESTROY;
+ goto alloc_skb;
+ }
+ if (events & (IPCT_NEW | IPCT_RELATED)) {
+ type = IPCTNL_MSG_CT_NEW;
+ flags = NLM_F_CREATE|NLM_F_EXCL;
+ /* dump everything */
+ events = ~0UL;
+ group = NFNLGRP_CONNTRACK_NEW;
+ goto alloc_skb;
+ }
+ if (events & (IPCT_STATUS |
+ IPCT_PROTOINFO |
+ IPCT_HELPER |
+ IPCT_HELPINFO |
+ IPCT_NATINFO)) {
+ type = IPCTNL_MSG_CT_NEW;
+ group = NFNLGRP_CONNTRACK_UPDATE;
+ goto alloc_skb;
+ }
+
+ return NOTIFY_DONE;
+
+alloc_skb:
+ /* FIXME: Check if there are any listeners before, don't hurt performance */
+
+ skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!skb)
+ return NOTIFY_DONE;
+
+ b = skb->tail;
+
+ type |= NFNL_SUBSYS_CTNETLINK << 8;
+ nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg));
+ nfmsg = NLMSG_DATA(nlh);
+
+ nlh->nlmsg_flags = flags;
+ nfmsg->nfgen_family = AF_INET;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = 0;
+
+ nest_parms = NFA_NEST(skb, CTA_TUPLE_ORIG);
+ if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_ORIGINAL)) < 0)
+ goto nfattr_failure;
+ NFA_NEST_END(skb, nest_parms);
+
+ nest_parms = NFA_NEST(skb, CTA_TUPLE_REPLY);
+ if (ctnetlink_dump_tuples(skb, tuple(ct, IP_CT_DIR_REPLY)) < 0)
+ goto nfattr_failure;
+ NFA_NEST_END(skb, nest_parms);
+
+ /* NAT stuff is now a status flag */
+ if ((events & IPCT_STATUS || events & IPCT_NATINFO)
+ && ctnetlink_dump_status(skb, ct) < 0)
+ goto nfattr_failure;
+ if (events & IPCT_REFRESH
+ && ctnetlink_dump_timeout(skb, ct) < 0)
+ goto nfattr_failure;
+ if (events & IPCT_PROTOINFO
+ && ctnetlink_dump_protoinfo(skb, ct) < 0)
+ goto nfattr_failure;
+ if (events & IPCT_HELPINFO
+ && ctnetlink_dump_helpinfo(skb, ct) < 0)
+ goto nfattr_failure;
+
+ if (ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||
+ ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)
+ goto nfattr_failure;
+
+ nlh->nlmsg_len = skb->tail - b;
+ nfnetlink_send(skb, 0, group, 0);
+ return NOTIFY_DONE;
+
+nlmsg_failure:
+nfattr_failure:
+ kfree_skb(skb);
+ return NOTIFY_DONE;
+}
+#endif /* CONFIG_IP_NF_CONNTRACK_EVENTS */
+
+static int ctnetlink_done(struct netlink_callback *cb)
+{
+ DEBUGP("entered %s\n", __FUNCTION__);
+ return 0;
+}
+
+static int
+ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ip_conntrack *ct = NULL;
+ struct ip_conntrack_tuple_hash *h;
+ struct list_head *i;
+ u_int32_t *id = (u_int32_t *) &cb->args[1];
+
+ DEBUGP("entered %s, last bucket=%lu id=%u\n", __FUNCTION__,
+ cb->args[0], *id);
+
+ read_lock_bh(&ip_conntrack_lock);
+ for (; cb->args[0] < ip_conntrack_htable_size; cb->args[0]++, *id = 0) {
+ list_for_each_prev(i, &ip_conntrack_hash[cb->args[0]]) {
+ h = (struct ip_conntrack_tuple_hash *) i;
+ if (DIRECTION(h) != IP_CT_DIR_ORIGINAL)
+ continue;
+ ct = tuplehash_to_ctrack(h);
+ if (ct->id <= *id)
+ continue;
+ if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ IPCTNL_MSG_CT_NEW,
+ 1, ct) < 0)
+ goto out;
+ *id = ct->id;
+ }
+ }
+out:
+ read_unlock_bh(&ip_conntrack_lock);
+
+ DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id);
+
+ return skb->len;
+}
+
+#ifdef CONFIG_IP_NF_CT_ACCT
+static int
+ctnetlink_dump_table_w(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ip_conntrack *ct = NULL;
+ struct ip_conntrack_tuple_hash *h;
+ struct list_head *i;
+ u_int32_t *id = (u_int32_t *) &cb->args[1];
+
+ DEBUGP("entered %s, last bucket=%u id=%u\n", __FUNCTION__,
+ cb->args[0], *id);
+
+ write_lock_bh(&ip_conntrack_lock);
+ for (; cb->args[0] < ip_conntrack_htable_size; cb->args[0]++, *id = 0) {
+ list_for_each_prev(i, &ip_conntrack_hash[cb->args[0]]) {
+ h = (struct ip_conntrack_tuple_hash *) i;
+ if (DIRECTION(h) != IP_CT_DIR_ORIGINAL)
+ continue;
+ ct = tuplehash_to_ctrack(h);
+ if (ct->id <= *id)
+ continue;
+ if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ IPCTNL_MSG_CT_NEW,
+ 1, ct) < 0)
+ goto out;
+ *id = ct->id;
+
+ memset(&ct->counters, 0, sizeof(ct->counters));
+ }
+ }
+out:
+ write_unlock_bh(&ip_conntrack_lock);
+
+ DEBUGP("leaving, last bucket=%lu id=%u\n", cb->args[0], *id);
+
+ return skb->len;
+}
+#endif
+
+static const int cta_min_ip[CTA_IP_MAX] = {
+ [CTA_IP_V4_SRC-1] = sizeof(u_int32_t),
+ [CTA_IP_V4_DST-1] = sizeof(u_int32_t),
+};
+
+static inline int
+ctnetlink_parse_tuple_ip(struct nfattr *attr, struct ip_conntrack_tuple *tuple)
+{
+ struct nfattr *tb[CTA_IP_MAX];
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+
+ if (nfattr_parse_nested(tb, CTA_IP_MAX, attr) < 0)
+ goto nfattr_failure;
+
+ if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip))
+ return -EINVAL;
+
+ if (!tb[CTA_IP_V4_SRC-1])
+ return -EINVAL;
+ tuple->src.ip = *(u_int32_t *)NFA_DATA(tb[CTA_IP_V4_SRC-1]);
+
+ if (!tb[CTA_IP_V4_DST-1])
+ return -EINVAL;
+ tuple->dst.ip = *(u_int32_t *)NFA_DATA(tb[CTA_IP_V4_DST-1]);
+
+ DEBUGP("leaving\n");
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static const int cta_min_proto[CTA_PROTO_MAX] = {
+ [CTA_PROTO_NUM-1] = sizeof(u_int16_t),
+ [CTA_PROTO_SRC_PORT-1] = sizeof(u_int16_t),
+ [CTA_PROTO_DST_PORT-1] = sizeof(u_int16_t),
+ [CTA_PROTO_ICMP_TYPE-1] = sizeof(u_int8_t),
+ [CTA_PROTO_ICMP_CODE-1] = sizeof(u_int8_t),
+ [CTA_PROTO_ICMP_ID-1] = sizeof(u_int16_t),
+};
+
+static inline int
+ctnetlink_parse_tuple_proto(struct nfattr *attr,
+ struct ip_conntrack_tuple *tuple)
+{
+ struct nfattr *tb[CTA_PROTO_MAX];
+ struct ip_conntrack_protocol *proto;
+ int ret = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (nfattr_parse_nested(tb, CTA_PROTO_MAX, attr) < 0)
+ goto nfattr_failure;
+
+ if (nfattr_bad_size(tb, CTA_PROTO_MAX, cta_min_proto))
+ return -EINVAL;
+
+ if (!tb[CTA_PROTO_NUM-1])
+ return -EINVAL;
+ tuple->dst.protonum = *(u_int16_t *)NFA_DATA(tb[CTA_PROTO_NUM-1]);
+
+ proto = ip_conntrack_proto_find_get(tuple->dst.protonum);
+
+ if (likely(proto && proto->nfattr_to_tuple)) {
+ ret = proto->nfattr_to_tuple(tb, tuple);
+ ip_conntrack_proto_put(proto);
+ }
+
+ return ret;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_parse_tuple(struct nfattr *cda[], struct ip_conntrack_tuple *tuple,
+ enum ctattr_tuple type)
+{
+ struct nfattr *tb[CTA_TUPLE_MAX];
+ int err;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ memset(tuple, 0, sizeof(*tuple));
+
+ if (nfattr_parse_nested(tb, CTA_TUPLE_MAX, cda[type-1]) < 0)
+ goto nfattr_failure;
+
+ if (!tb[CTA_TUPLE_IP-1])
+ return -EINVAL;
+
+ err = ctnetlink_parse_tuple_ip(tb[CTA_TUPLE_IP-1], tuple);
+ if (err < 0)
+ return err;
+
+ if (!tb[CTA_TUPLE_PROTO-1])
+ return -EINVAL;
+
+ err = ctnetlink_parse_tuple_proto(tb[CTA_TUPLE_PROTO-1], tuple);
+ if (err < 0)
+ return err;
+
+ /* orig and expect tuples get DIR_ORIGINAL */
+ if (type == CTA_TUPLE_REPLY)
+ tuple->dst.dir = IP_CT_DIR_REPLY;
+ else
+ tuple->dst.dir = IP_CT_DIR_ORIGINAL;
+
+ DUMP_TUPLE(tuple);
+
+ DEBUGP("leaving\n");
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+#ifdef CONFIG_IP_NF_NAT_NEEDED
+static const int cta_min_protonat[CTA_PROTONAT_MAX] = {
+ [CTA_PROTONAT_PORT_MIN-1] = sizeof(u_int16_t),
+ [CTA_PROTONAT_PORT_MAX-1] = sizeof(u_int16_t),
+};
+
+static int ctnetlink_parse_nat_proto(struct nfattr *attr,
+ const struct ip_conntrack *ct,
+ struct ip_nat_range *range)
+{
+ struct nfattr *tb[CTA_PROTONAT_MAX];
+ struct ip_nat_protocol *npt;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (nfattr_parse_nested(tb, CTA_PROTONAT_MAX, attr) < 0)
+ goto nfattr_failure;
+
+ if (nfattr_bad_size(tb, CTA_PROTONAT_MAX, cta_min_protonat))
+ goto nfattr_failure;
+
+ npt = ip_nat_proto_find_get(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
+ if (!npt)
+ return 0;
+
+ if (!npt->nfattr_to_range) {
+ ip_nat_proto_put(npt);
+ return 0;
+ }
+
+ /* nfattr_to_range returns 1 if it parsed, 0 if not, neg. on error */
+ if (npt->nfattr_to_range(tb, range) > 0)
+ range->flags |= IP_NAT_RANGE_PROTO_SPECIFIED;
+
+ ip_nat_proto_put(npt);
+
+ DEBUGP("leaving\n");
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_parse_nat(struct nfattr *cda[],
+ const struct ip_conntrack *ct, struct ip_nat_range *range)
+{
+ struct nfattr *tb[CTA_NAT_MAX];
+ int err;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ memset(range, 0, sizeof(*range));
+
+ if (nfattr_parse_nested(tb, CTA_NAT_MAX, cda[CTA_NAT-1]) < 0)
+ goto nfattr_failure;
+
+ if (tb[CTA_NAT_MINIP-1])
+ range->min_ip = *(u_int32_t *)NFA_DATA(tb[CTA_NAT_MINIP-1]);
+
+ if (!tb[CTA_NAT_MAXIP-1])
+ range->max_ip = range->min_ip;
+ else
+ range->max_ip = *(u_int32_t *)NFA_DATA(tb[CTA_NAT_MAXIP-1]);
+
+ if (range->min_ip)
+ range->flags |= IP_NAT_RANGE_MAP_IPS;
+
+ if (!tb[CTA_NAT_PROTO-1])
+ return 0;
+
+ err = ctnetlink_parse_nat_proto(tb[CTA_NAT_PROTO-1], ct, range);
+ if (err < 0)
+ return err;
+
+ DEBUGP("leaving\n");
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+#endif
+
+static inline int
+ctnetlink_parse_help(struct nfattr *attr, char **helper_name)
+{
+ struct nfattr *tb[CTA_HELP_MAX];
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (nfattr_parse_nested(tb, CTA_HELP_MAX, attr) < 0)
+ goto nfattr_failure;
+
+ if (!tb[CTA_HELP_NAME-1])
+ return -EINVAL;
+
+ *helper_name = NFA_DATA(tb[CTA_HELP_NAME-1]);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static int
+ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+{
+ struct ip_conntrack_tuple_hash *h;
+ struct ip_conntrack_tuple tuple;
+ struct ip_conntrack *ct;
+ int err = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (cda[CTA_TUPLE_ORIG-1])
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG);
+ else if (cda[CTA_TUPLE_REPLY-1])
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY);
+ else {
+ /* Flush the whole table */
+ ip_conntrack_flush();
+ return 0;
+ }
+
+ if (err < 0)
+ return err;
+
+ h = ip_conntrack_find_get(&tuple, NULL);
+ if (!h) {
+ DEBUGP("tuple not found in conntrack hash\n");
+ return -ENOENT;
+ }
+
+ ct = tuplehash_to_ctrack(h);
+
+ if (cda[CTA_ID-1]) {
+ u_int32_t id = ntohl(*(u_int32_t *)NFA_DATA(cda[CTA_ID-1]));
+ if (ct->id != id) {
+ ip_conntrack_put(ct);
+ return -ENOENT;
+ }
+ }
+ if (del_timer(&ct->timeout)) {
+ ip_conntrack_put(ct);
+ ct->timeout.function((unsigned long)ct);
+ return 0;
+ }
+ ip_conntrack_put(ct);
+ DEBUGP("leaving\n");
+
+ return 0;
+}
+
+static int
+ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+{
+ struct ip_conntrack_tuple_hash *h;
+ struct ip_conntrack_tuple tuple;
+ struct ip_conntrack *ct;
+ struct sk_buff *skb2 = NULL;
+ int err = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (nlh->nlmsg_flags & NLM_F_DUMP) {
+ struct nfgenmsg *msg = NLMSG_DATA(nlh);
+ u32 rlen;
+
+ if (msg->nfgen_family != AF_INET)
+ return -EAFNOSUPPORT;
+
+ if (NFNL_MSG_TYPE(nlh->nlmsg_type) ==
+ IPCTNL_MSG_CT_GET_CTRZERO) {
+#ifdef CONFIG_IP_NF_CT_ACCT
+ if ((*errp = netlink_dump_start(ctnl, skb, nlh,
+ ctnetlink_dump_table_w,
+ ctnetlink_done)) != 0)
+ return -EINVAL;
+#else
+ return -ENOTSUPP;
+#endif
+ } else {
+ if ((*errp = netlink_dump_start(ctnl, skb, nlh,
+ ctnetlink_dump_table,
+ ctnetlink_done)) != 0)
+ return -EINVAL;
+ }
+
+ rlen = NLMSG_ALIGN(nlh->nlmsg_len);
+ if (rlen > skb->len)
+ rlen = skb->len;
+ skb_pull(skb, rlen);
+ return 0;
+ }
+
+ if (cda[CTA_TUPLE_ORIG-1])
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_ORIG);
+ else if (cda[CTA_TUPLE_REPLY-1])
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY);
+ else
+ return -EINVAL;
+
+ if (err < 0)
+ return err;
+
+ h = ip_conntrack_find_get(&tuple, NULL);
+ if (!h) {
+ DEBUGP("tuple not found in conntrack hash");
+ return -ENOENT;
+ }
+ DEBUGP("tuple found\n");
+ ct = tuplehash_to_ctrack(h);
+
+ err = -ENOMEM;
+ skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!skb2) {
+ ip_conntrack_put(ct);
+ return -ENOMEM;
+ }
+ NETLINK_CB(skb2).dst_pid = NETLINK_CB(skb).pid;
+
+ err = ctnetlink_fill_info(skb2, NETLINK_CB(skb).pid, nlh->nlmsg_seq,
+ IPCTNL_MSG_CT_NEW, 1, ct);
+ ip_conntrack_put(ct);
+ if (err <= 0)
+ goto out;
+
+ err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+ if (err < 0)
+ goto out;
+
+ DEBUGP("leaving\n");
+ return 0;
+
+out:
+ if (skb2)
+ kfree_skb(skb2);
+ return -1;
+}
+
+static inline int
+ctnetlink_change_status(struct ip_conntrack *ct, struct nfattr *cda[])
+{
+ unsigned long d, status = *(u_int32_t *)NFA_DATA(cda[CTA_STATUS-1]);
+ d = ct->status ^ status;
+
+ if (d & (IPS_EXPECTED|IPS_CONFIRMED|IPS_DYING))
+ /* unchangeable */
+ return -EINVAL;
+
+ if (d & IPS_SEEN_REPLY && !(status & IPS_SEEN_REPLY))
+ /* SEEN_REPLY bit can only be set */
+ return -EINVAL;
+
+
+ if (d & IPS_ASSURED && !(status & IPS_ASSURED))
+ /* ASSURED bit can only be set */
+ return -EINVAL;
+
+ if (cda[CTA_NAT-1]) {
+#ifndef CONFIG_IP_NF_NAT_NEEDED
+ return -EINVAL;
+#else
+ unsigned int hooknum;
+ struct ip_nat_range range;
+
+ if (ctnetlink_parse_nat(cda, ct, &range) < 0)
+ return -EINVAL;
+
+ DEBUGP("NAT: %u.%u.%u.%u-%u.%u.%u.%u:%u-%u\n",
+ NIPQUAD(range.min_ip), NIPQUAD(range.max_ip),
+ htons(range.min.all), htons(range.max.all));
+
+ /* This is tricky but it works. ip_nat_setup_info needs the
+ * hook number as parameter, so let's do the correct
+ * conversion and run away */
+ if (status & IPS_SRC_NAT_DONE)
+ hooknum = NF_IP_POST_ROUTING; /* IP_NAT_MANIP_SRC */
+ else if (status & IPS_DST_NAT_DONE)
+ hooknum = NF_IP_PRE_ROUTING; /* IP_NAT_MANIP_DST */
+ else
+ return -EINVAL; /* Missing NAT flags */
+
+ DEBUGP("NAT status: %lu\n",
+ status & (IPS_NAT_MASK | IPS_NAT_DONE_MASK));
+
+ if (ip_nat_initialized(ct, hooknum))
+ return -EEXIST;
+ ip_nat_setup_info(ct, &range, hooknum);
+
+ DEBUGP("NAT status after setup_info: %lu\n",
+ ct->status & (IPS_NAT_MASK | IPS_NAT_DONE_MASK));
+#endif
+ }
+
+ /* Be careful here, modifying NAT bits can screw up things,
+ * so don't let users modify them directly if they don't pass
+ * ip_nat_range. */
+ ct->status |= status & ~(IPS_NAT_DONE_MASK | IPS_NAT_MASK);
+ return 0;
+}
+
+
+static inline int
+ctnetlink_change_helper(struct ip_conntrack *ct, struct nfattr *cda[])
+{
+ struct ip_conntrack_helper *helper;
+ char *helpname;
+ int err;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ /* don't change helper of sibling connections */
+ if (ct->master)
+ return -EINVAL;
+
+ err = ctnetlink_parse_help(cda[CTA_HELP-1], &helpname);
+ if (err < 0)
+ return err;
+
+ helper = __ip_conntrack_helper_find_byname(helpname);
+ if (!helper) {
+ if (!strcmp(helpname, ""))
+ helper = NULL;
+ else
+ return -EINVAL;
+ }
+
+ if (ct->helper) {
+ if (!helper) {
+ /* we had a helper before ... */
+ ip_ct_remove_expectations(ct);
+ ct->helper = NULL;
+ } else {
+ /* need to zero data of old helper */
+ memset(&ct->help, 0, sizeof(ct->help));
+ }
+ }
+
+ ct->helper = helper;
+
+ return 0;
+}
+
+static inline int
+ctnetlink_change_timeout(struct ip_conntrack *ct, struct nfattr *cda[])
+{
+ u_int32_t timeout = ntohl(*(u_int32_t *)NFA_DATA(cda[CTA_TIMEOUT-1]));
+
+ if (!del_timer(&ct->timeout))
+ return -ETIME;
+
+ ct->timeout.expires = jiffies + timeout * HZ;
+ add_timer(&ct->timeout);
+
+ return 0;
+}
+
+static int
+ctnetlink_change_conntrack(struct ip_conntrack *ct, struct nfattr *cda[])
+{
+ int err;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (cda[CTA_HELP-1]) {
+ err = ctnetlink_change_helper(ct, cda);
+ if (err < 0)
+ return err;
+ }
+
+ if (cda[CTA_TIMEOUT-1]) {
+ err = ctnetlink_change_timeout(ct, cda);
+ if (err < 0)
+ return err;
+ }
+
+ if (cda[CTA_STATUS-1]) {
+ err = ctnetlink_change_status(ct, cda);
+ if (err < 0)
+ return err;
+ }
+
+ DEBUGP("all done\n");
+ return 0;
+}
+
+static int
+ctnetlink_create_conntrack(struct nfattr *cda[],
+ struct ip_conntrack_tuple *otuple,
+ struct ip_conntrack_tuple *rtuple)
+{
+ struct ip_conntrack *ct;
+ int err = -EINVAL;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ ct = ip_conntrack_alloc(otuple, rtuple);
+ if (ct == NULL || IS_ERR(ct))
+ return -ENOMEM;
+
+ if (!cda[CTA_TIMEOUT-1])
+ goto err;
+ ct->timeout.expires = ntohl(*(u_int32_t *)NFA_DATA(cda[CTA_TIMEOUT-1]));
+
+ ct->timeout.expires = jiffies + ct->timeout.expires * HZ;
+ ct->status |= IPS_CONFIRMED;
+
+ err = ctnetlink_change_status(ct, cda);
+ if (err < 0)
+ goto err;
+
+ ct->helper = ip_conntrack_helper_find_get(rtuple);
+
+ add_timer(&ct->timeout);
+ ip_conntrack_hash_insert(ct);
+
+ if (ct->helper)
+ ip_conntrack_helper_put(ct->helper);
+
+ DEBUGP("conntrack with id %u inserted\n", ct->id);
+ return 0;
+
+err:
+ ip_conntrack_free(ct);
+ return err;
+}
+
+static int
+ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+{
+ struct ip_conntrack_tuple otuple, rtuple;
+ struct ip_conntrack_tuple_hash *h = NULL;
+ int err = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (cda[CTA_TUPLE_ORIG-1]) {
+ err = ctnetlink_parse_tuple(cda, &otuple, CTA_TUPLE_ORIG);
+ if (err < 0)
+ return err;
+ }
+
+ if (cda[CTA_TUPLE_REPLY-1]) {
+ err = ctnetlink_parse_tuple(cda, &rtuple, CTA_TUPLE_REPLY);
+ if (err < 0)
+ return err;
+ }
+
+ write_lock_bh(&ip_conntrack_lock);
+ if (cda[CTA_TUPLE_ORIG-1])
+ h = __ip_conntrack_find(&otuple, NULL);
+ else if (cda[CTA_TUPLE_REPLY-1])
+ h = __ip_conntrack_find(&rtuple, NULL);
+
+ if (h == NULL) {
+ write_unlock_bh(&ip_conntrack_lock);
+ DEBUGP("no such conntrack, create new\n");
+ err = -ENOENT;
+ if (nlh->nlmsg_flags & NLM_F_CREATE)
+ err = ctnetlink_create_conntrack(cda, &otuple, &rtuple);
+ return err;
+ }
+ /* implicit 'else' */
+
+ /* we only allow nat config for new conntracks */
+ if (cda[CTA_NAT-1]) {
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ /* We manipulate the conntrack inside the global conntrack table lock,
+ * so there's no need to increase the refcount */
+ DEBUGP("conntrack found\n");
+ err = -EEXIST;
+ if (!(nlh->nlmsg_flags & NLM_F_EXCL))
+ err = ctnetlink_change_conntrack(tuplehash_to_ctrack(h), cda);
+
+out_unlock:
+ write_unlock_bh(&ip_conntrack_lock);
+ return err;
+}
+
+/***********************************************************************
+ * EXPECT
+ ***********************************************************************/
+
+static inline int
+ctnetlink_exp_dump_tuple(struct sk_buff *skb,
+ const struct ip_conntrack_tuple *tuple,
+ enum ctattr_expect type)
+{
+ struct nfattr *nest_parms = NFA_NEST(skb, type);
+
+ if (ctnetlink_dump_tuples(skb, tuple) < 0)
+ goto nfattr_failure;
+
+ NFA_NEST_END(skb, nest_parms);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static inline int
+ctnetlink_exp_dump_expect(struct sk_buff *skb,
+ const struct ip_conntrack_expect *exp)
+{
+ struct ip_conntrack *master = exp->master;
+ u_int32_t timeout = htonl((exp->timeout.expires - jiffies) / HZ);
+ u_int32_t id = htonl(exp->id);
+
+ if (ctnetlink_exp_dump_tuple(skb, &exp->tuple, CTA_EXPECT_TUPLE) < 0)
+ goto nfattr_failure;
+ if (ctnetlink_exp_dump_tuple(skb, &exp->mask, CTA_EXPECT_MASK) < 0)
+ goto nfattr_failure;
+ if (ctnetlink_exp_dump_tuple(skb,
+ &master->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
+ CTA_EXPECT_MASTER) < 0)
+ goto nfattr_failure;
+
+ NFA_PUT(skb, CTA_EXPECT_TIMEOUT, sizeof(timeout), &timeout);
+ NFA_PUT(skb, CTA_EXPECT_ID, sizeof(u_int32_t), &id);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static int
+ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
+ int event,
+ int nowait,
+ const struct ip_conntrack_expect *exp)
+{
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+ unsigned char *b;
+
+ b = skb->tail;
+
+ event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
+ nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
+ nfmsg = NLMSG_DATA(nlh);
+
+ nlh->nlmsg_flags = (nowait && pid) ? NLM_F_MULTI : 0;
+ nfmsg->nfgen_family = AF_INET;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = 0;
+
+ if (ctnetlink_exp_dump_expect(skb, exp) < 0)
+ goto nfattr_failure;
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+nfattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+static int ctnetlink_expect_event(struct notifier_block *this,
+ unsigned long events, void *ptr)
+{
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+ struct ip_conntrack_expect *exp = (struct ip_conntrack_expect *)ptr;
+ struct sk_buff *skb;
+ unsigned int type;
+ unsigned char *b;
+ int flags = 0;
+ u16 proto;
+
+ if (events & IPEXP_NEW) {
+ type = IPCTNL_MSG_EXP_NEW;
+ flags = NLM_F_CREATE|NLM_F_EXCL;
+ } else
+ return NOTIFY_DONE;
+
+ skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
+ if (!skb)
+ return NOTIFY_DONE;
+
+ b = skb->tail;
+
+ type |= NFNL_SUBSYS_CTNETLINK << 8;
+ nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(struct nfgenmsg));
+ nfmsg = NLMSG_DATA(nlh);
+
+ nlh->nlmsg_flags = flags;
+ nfmsg->nfgen_family = AF_INET;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = 0;
+
+ if (ctnetlink_exp_dump_expect(skb, exp) < 0)
+ goto nfattr_failure;
+
+ nlh->nlmsg_len = skb->tail - b;
+ proto = exp->tuple.dst.protonum;
+ nfnetlink_send(skb, 0, NFNLGRP_CONNTRACK_EXP_NEW, 0);
+ return NOTIFY_DONE;
+
+nlmsg_failure:
+nfattr_failure:
+ kfree_skb(skb);
+ return NOTIFY_DONE;
+}
+#endif
+
+static int
+ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ip_conntrack_expect *exp = NULL;
+ struct list_head *i;
+ u_int32_t *id = (u_int32_t *) &cb->args[0];
+
+ DEBUGP("entered %s, last id=%llu\n", __FUNCTION__, *id);
+
+ read_lock_bh(&ip_conntrack_lock);
+ list_for_each_prev(i, &ip_conntrack_expect_list) {
+ exp = (struct ip_conntrack_expect *) i;
+ if (exp->id <= *id)
+ continue;
+ if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ IPCTNL_MSG_EXP_NEW,
+ 1, exp) < 0)
+ goto out;
+ *id = exp->id;
+ }
+out:
+ read_unlock_bh(&ip_conntrack_lock);
+
+ DEBUGP("leaving, last id=%llu\n", *id);
+
+ return skb->len;
+}
+
+static int
+ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+{
+ struct ip_conntrack_tuple tuple;
+ struct ip_conntrack_expect *exp;
+ struct sk_buff *skb2;
+ int err = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (nlh->nlmsg_flags & NLM_F_DUMP) {
+ struct nfgenmsg *msg = NLMSG_DATA(nlh);
+ u32 rlen;
+
+ if (msg->nfgen_family != AF_INET)
+ return -EAFNOSUPPORT;
+
+ if ((*errp = netlink_dump_start(ctnl, skb, nlh,
+ ctnetlink_exp_dump_table,
+ ctnetlink_done)) != 0)
+ return -EINVAL;
+ rlen = NLMSG_ALIGN(nlh->nlmsg_len);
+ if (rlen > skb->len)
+ rlen = skb->len;
+ skb_pull(skb, rlen);
+ return 0;
+ }
+
+ if (cda[CTA_EXPECT_MASTER-1])
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_MASTER);
+ else
+ return -EINVAL;
+
+ if (err < 0)
+ return err;
+
+ exp = ip_conntrack_expect_find_get(&tuple);
+ if (!exp)
+ return -ENOENT;
+
+ err = -ENOMEM;
+ skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!skb2)
+ goto out;
+ NETLINK_CB(skb2).dst_pid = NETLINK_CB(skb).pid;
+
+ err = ctnetlink_exp_fill_info(skb2, NETLINK_CB(skb).pid,
+ nlh->nlmsg_seq, IPCTNL_MSG_EXP_NEW,
+ 1, exp);
+ if (err <= 0)
+ goto out;
+
+ ip_conntrack_expect_put(exp);
+
+ err = netlink_unicast(ctnl, skb2, NETLINK_CB(skb).pid, MSG_DONTWAIT);
+ if (err < 0)
+ goto free;
+
+ return err;
+
+out:
+ ip_conntrack_expect_put(exp);
+free:
+ if (skb2)
+ kfree_skb(skb2);
+ return err;
+}
+
+static int
+ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+{
+ struct ip_conntrack_expect *exp, *tmp;
+ struct ip_conntrack_tuple tuple;
+ struct ip_conntrack_helper *h;
+ int err;
+
+ if (cda[CTA_EXPECT_TUPLE-1]) {
+ /* delete a single expect by tuple */
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE);
+ if (err < 0)
+ return err;
+
+ /* bump usage count to 2 */
+ exp = ip_conntrack_expect_find_get(&tuple);
+ if (!exp)
+ return -ENOENT;
+
+ if (cda[CTA_EXPECT_ID-1]) {
+ u_int32_t id =
+ *(u_int32_t *)NFA_DATA(cda[CTA_EXPECT_ID-1]);
+ if (exp->id != ntohl(id)) {
+ ip_conntrack_expect_put(exp);
+ return -ENOENT;
+ }
+ }
+
+ /* after list removal, usage count == 1 */
+ ip_conntrack_unexpect_related(exp);
+ /* have to put what we 'get' above.
+ * after this line usage count == 0 */
+ ip_conntrack_expect_put(exp);
+ } else if (cda[CTA_EXPECT_HELP_NAME-1]) {
+ char *name = NFA_DATA(cda[CTA_EXPECT_HELP_NAME-1]);
+
+ /* delete all expectations for this helper */
+ write_lock_bh(&ip_conntrack_lock);
+ h = __ip_conntrack_helper_find_byname(name);
+ if (!h) {
+ write_unlock_bh(&ip_conntrack_lock);
+ return -EINVAL;
+ }
+ list_for_each_entry_safe(exp, tmp, &ip_conntrack_expect_list,
+ list) {
+ if (exp->master->helper == h
+ && del_timer(&exp->timeout))
+ __ip_ct_expect_unlink_destroy(exp);
+ }
+ write_unlock(&ip_conntrack_lock);
+ } else {
+ /* This basically means we have to flush everything*/
+ write_lock_bh(&ip_conntrack_lock);
+ list_for_each_entry_safe(exp, tmp, &ip_conntrack_expect_list,
+ list) {
+ if (del_timer(&exp->timeout))
+ __ip_ct_expect_unlink_destroy(exp);
+ }
+ write_unlock_bh(&ip_conntrack_lock);
+ }
+
+ return 0;
+}
+static int
+ctnetlink_change_expect(struct ip_conntrack_expect *x, struct nfattr *cda[])
+{
+ return -EOPNOTSUPP;
+}
+
+static int
+ctnetlink_create_expect(struct nfattr *cda[])
+{
+ struct ip_conntrack_tuple tuple, mask, master_tuple;
+ struct ip_conntrack_tuple_hash *h = NULL;
+ struct ip_conntrack_expect *exp;
+ struct ip_conntrack *ct;
+ int err = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ /* caller guarantees that those three CTA_EXPECT_* exist */
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE);
+ if (err < 0)
+ return err;
+ err = ctnetlink_parse_tuple(cda, &mask, CTA_EXPECT_MASK);
+ if (err < 0)
+ return err;
+ err = ctnetlink_parse_tuple(cda, &master_tuple, CTA_EXPECT_MASTER);
+ if (err < 0)
+ return err;
+
+ /* Look for master conntrack of this expectation */
+ h = ip_conntrack_find_get(&master_tuple, NULL);
+ if (!h)
+ return -ENOENT;
+ ct = tuplehash_to_ctrack(h);
+
+ if (!ct->helper) {
+ /* such conntrack hasn't got any helper, abort */
+ err = -EINVAL;
+ goto out;
+ }
+
+ exp = ip_conntrack_expect_alloc(ct);
+ if (!exp) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ exp->expectfn = NULL;
+ exp->master = ct;
+ memcpy(&exp->tuple, &tuple, sizeof(struct ip_conntrack_tuple));
+ memcpy(&exp->mask, &mask, sizeof(struct ip_conntrack_tuple));
+
+ err = ip_conntrack_expect_related(exp);
+ ip_conntrack_expect_put(exp);
+
+out:
+ ip_conntrack_put(tuplehash_to_ctrack(h));
+ return err;
+}
+
+static int
+ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *cda[], int *errp)
+{
+ struct ip_conntrack_tuple tuple;
+ struct ip_conntrack_expect *exp;
+ int err = 0;
+
+ DEBUGP("entered %s\n", __FUNCTION__);
+
+ if (!cda[CTA_EXPECT_TUPLE-1]
+ || !cda[CTA_EXPECT_MASK-1]
+ || !cda[CTA_EXPECT_MASTER-1])
+ return -EINVAL;
+
+ err = ctnetlink_parse_tuple(cda, &tuple, CTA_EXPECT_TUPLE);
+ if (err < 0)
+ return err;
+
+ write_lock_bh(&ip_conntrack_lock);
+ exp = __ip_conntrack_expect_find(&tuple);
+
+ if (!exp) {
+ write_unlock_bh(&ip_conntrack_lock);
+ err = -ENOENT;
+ if (nlh->nlmsg_flags & NLM_F_CREATE)
+ err = ctnetlink_create_expect(cda);
+ return err;
+ }
+
+ err = -EEXIST;
+ if (!(nlh->nlmsg_flags & NLM_F_EXCL))
+ err = ctnetlink_change_expect(exp, cda);
+ write_unlock_bh(&ip_conntrack_lock);
+
+ DEBUGP("leaving\n");
+
+ return err;
+}
+
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+static struct notifier_block ctnl_notifier = {
+ .notifier_call = ctnetlink_conntrack_event,
+};
+
+static struct notifier_block ctnl_notifier_exp = {
+ .notifier_call = ctnetlink_expect_event,
+};
+#endif
+
+static struct nfnl_callback ctnl_cb[IPCTNL_MSG_MAX] = {
+ [IPCTNL_MSG_CT_NEW] = { .call = ctnetlink_new_conntrack,
+ .attr_count = CTA_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [IPCTNL_MSG_CT_GET] = { .call = ctnetlink_get_conntrack,
+ .attr_count = CTA_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [IPCTNL_MSG_CT_DELETE] = { .call = ctnetlink_del_conntrack,
+ .attr_count = CTA_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [IPCTNL_MSG_CT_GET_CTRZERO] = { .call = ctnetlink_get_conntrack,
+ .attr_count = CTA_MAX,
+ .cap_required = CAP_NET_ADMIN },
+};
+
+static struct nfnl_callback ctnl_exp_cb[IPCTNL_MSG_EXP_MAX] = {
+ [IPCTNL_MSG_EXP_GET] = { .call = ctnetlink_get_expect,
+ .attr_count = CTA_EXPECT_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [IPCTNL_MSG_EXP_NEW] = { .call = ctnetlink_new_expect,
+ .attr_count = CTA_EXPECT_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [IPCTNL_MSG_EXP_DELETE] = { .call = ctnetlink_del_expect,
+ .attr_count = CTA_EXPECT_MAX,
+ .cap_required = CAP_NET_ADMIN },
+};
+
+static struct nfnetlink_subsystem ctnl_subsys = {
+ .name = "conntrack",
+ .subsys_id = NFNL_SUBSYS_CTNETLINK,
+ .cb_count = IPCTNL_MSG_MAX,
+ .cb = ctnl_cb,
+};
+
+static struct nfnetlink_subsystem ctnl_exp_subsys = {
+ .name = "conntrack_expect",
+ .subsys_id = NFNL_SUBSYS_CTNETLINK_EXP,
+ .cb_count = IPCTNL_MSG_EXP_MAX,
+ .cb = ctnl_exp_cb,
+};
+
+static int __init ctnetlink_init(void)
+{
+ int ret;
+
+ printk("ctnetlink v%s: registering with nfnetlink.\n", version);
+ ret = nfnetlink_subsys_register(&ctnl_subsys);
+ if (ret < 0) {
+ printk("ctnetlink_init: cannot register with nfnetlink.\n");
+ goto err_out;
+ }
+
+ ret = nfnetlink_subsys_register(&ctnl_exp_subsys);
+ if (ret < 0) {
+ printk("ctnetlink_init: cannot register exp with nfnetlink.\n");
+ goto err_unreg_subsys;
+ }
+
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+ ret = ip_conntrack_register_notifier(&ctnl_notifier);
+ if (ret < 0) {
+ printk("ctnetlink_init: cannot register notifier.\n");
+ goto err_unreg_exp_subsys;
+ }
+
+ ret = ip_conntrack_expect_register_notifier(&ctnl_notifier_exp);
+ if (ret < 0) {
+ printk("ctnetlink_init: cannot expect register notifier.\n");
+ goto err_unreg_notifier;
+ }
+#endif
+
+ return 0;
+
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+err_unreg_notifier:
+ ip_conntrack_unregister_notifier(&ctnl_notifier);
+err_unreg_exp_subsys:
+ nfnetlink_subsys_unregister(&ctnl_exp_subsys);
+#endif
+err_unreg_subsys:
+ nfnetlink_subsys_unregister(&ctnl_subsys);
+err_out:
+ return ret;
+}
+
+static void __exit ctnetlink_exit(void)
+{
+ printk("ctnetlink: unregistering from nfnetlink.\n");
+
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+ ip_conntrack_unregister_notifier(&ctnl_notifier_exp);
+ ip_conntrack_unregister_notifier(&ctnl_notifier);
+#endif
+
+ nfnetlink_subsys_unregister(&ctnl_exp_subsys);
+ nfnetlink_subsys_unregister(&ctnl_subsys);
+ return;
+}
+
+module_init(ctnetlink_init);
+module_exit(ctnetlink_exit);
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_icmp.c b/net/ipv4/netfilter/ip_conntrack_proto_icmp.c
index 602c74db3252..838d1d69b36e 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_icmp.c
@@ -102,22 +102,24 @@ static int icmp_packet(struct ip_conntrack *ct,
ct->timeout.function((unsigned long)ct);
} else {
atomic_inc(&ct->proto.icmp.count);
+ ip_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb);
ip_ct_refresh_acct(ct, ctinfo, skb, ip_ct_icmp_timeout);
}
return NF_ACCEPT;
}
+static u_int8_t valid_new[] = {
+ [ICMP_ECHO] = 1,
+ [ICMP_TIMESTAMP] = 1,
+ [ICMP_INFO_REQUEST] = 1,
+ [ICMP_ADDRESS] = 1
+};
+
/* Called when a new connection for this protocol found. */
static int icmp_new(struct ip_conntrack *conntrack,
const struct sk_buff *skb)
{
- static u_int8_t valid_new[]
- = { [ICMP_ECHO] = 1,
- [ICMP_TIMESTAMP] = 1,
- [ICMP_INFO_REQUEST] = 1,
- [ICMP_ADDRESS] = 1 };
-
if (conntrack->tuplehash[0].tuple.dst.u.icmp.type >= sizeof(valid_new)
|| !valid_new[conntrack->tuplehash[0].tuple.dst.u.icmp.type]) {
/* Can't create a new ICMP `conn' with this. */
@@ -158,11 +160,12 @@ icmp_error_message(struct sk_buff *skb,
return NF_ACCEPT;
}
- innerproto = ip_ct_find_proto(inside->ip.protocol);
+ innerproto = ip_conntrack_proto_find_get(inside->ip.protocol);
dataoff = skb->nh.iph->ihl*4 + sizeof(inside->icmp) + inside->ip.ihl*4;
/* Are they talking about one of our connections? */
if (!ip_ct_get_tuple(&inside->ip, skb, dataoff, &origtuple, innerproto)) {
DEBUGP("icmp_error: ! get_tuple p=%u", inside->ip.protocol);
+ ip_conntrack_proto_put(innerproto);
return NF_ACCEPT;
}
@@ -170,8 +173,10 @@ icmp_error_message(struct sk_buff *skb,
been preserved inside the ICMP. */
if (!ip_ct_invert_tuple(&innertuple, &origtuple, innerproto)) {
DEBUGP("icmp_error_track: Can't invert tuple\n");
+ ip_conntrack_proto_put(innerproto);
return NF_ACCEPT;
}
+ ip_conntrack_proto_put(innerproto);
*ctinfo = IP_CT_RELATED;
@@ -212,7 +217,7 @@ icmp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo,
icmph = skb_header_pointer(skb, skb->nh.iph->ihl*4, sizeof(_ih), &_ih);
if (icmph == NULL) {
if (LOG_INVALID(IPPROTO_ICMP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_icmp: short packet ");
return -NF_ACCEPT;
}
@@ -226,13 +231,13 @@ icmp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo,
if (!(u16)csum_fold(skb->csum))
break;
if (LOG_INVALID(IPPROTO_ICMP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_icmp: bad HW ICMP checksum ");
return -NF_ACCEPT;
case CHECKSUM_NONE:
if ((u16)csum_fold(skb_checksum(skb, 0, skb->len, 0))) {
if (LOG_INVALID(IPPROTO_ICMP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_icmp: bad ICMP checksum ");
return -NF_ACCEPT;
}
@@ -249,7 +254,7 @@ checksum_skipped:
*/
if (icmph->type > NR_ICMP_TYPES) {
if (LOG_INVALID(IPPROTO_ICMP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_icmp: invalid ICMP type ");
return -NF_ACCEPT;
}
@@ -265,6 +270,47 @@ checksum_skipped:
return icmp_error_message(skb, ctinfo, hooknum);
}
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+static int icmp_tuple_to_nfattr(struct sk_buff *skb,
+ const struct ip_conntrack_tuple *t)
+{
+ NFA_PUT(skb, CTA_PROTO_ICMP_ID, sizeof(u_int16_t),
+ &t->src.u.icmp.id);
+ NFA_PUT(skb, CTA_PROTO_ICMP_TYPE, sizeof(u_int8_t),
+ &t->dst.u.icmp.type);
+ NFA_PUT(skb, CTA_PROTO_ICMP_CODE, sizeof(u_int8_t),
+ &t->dst.u.icmp.code);
+
+ if (t->dst.u.icmp.type >= sizeof(valid_new)
+ || !valid_new[t->dst.u.icmp.type])
+ return -EINVAL;
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+static int icmp_nfattr_to_tuple(struct nfattr *tb[],
+ struct ip_conntrack_tuple *tuple)
+{
+ if (!tb[CTA_PROTO_ICMP_TYPE-1]
+ || !tb[CTA_PROTO_ICMP_CODE-1]
+ || !tb[CTA_PROTO_ICMP_ID-1])
+ return -1;
+
+ tuple->dst.u.icmp.type =
+ *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_TYPE-1]);
+ tuple->dst.u.icmp.code =
+ *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_CODE-1]);
+ tuple->src.u.icmp.id =
+ *(u_int8_t *)NFA_DATA(tb[CTA_PROTO_ICMP_ID-1]);
+
+ return 0;
+}
+#endif
+
struct ip_conntrack_protocol ip_conntrack_protocol_icmp =
{
.proto = IPPROTO_ICMP,
@@ -276,4 +322,9 @@ struct ip_conntrack_protocol ip_conntrack_protocol_icmp =
.packet = icmp_packet,
.new = icmp_new,
.error = icmp_error,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .tuple_to_nfattr = icmp_tuple_to_nfattr,
+ .nfattr_to_tuple = icmp_nfattr_to_tuple,
+#endif
};
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c
index 31d75390bf12..a875f35e576d 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_sctp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_sctp.c
@@ -404,6 +404,8 @@ static int sctp_packet(struct ip_conntrack *conntrack,
}
conntrack->proto.sctp.state = newconntrack;
+ if (oldsctpstate != newconntrack)
+ ip_conntrack_event_cache(IPCT_PROTOINFO, skb);
write_unlock_bh(&sctp_lock);
}
@@ -503,7 +505,12 @@ static struct ip_conntrack_protocol ip_conntrack_protocol_sctp = {
.packet = sctp_packet,
.new = sctp_new,
.destroy = NULL,
- .me = THIS_MODULE
+ .me = THIS_MODULE,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .tuple_to_nfattr = ip_ct_port_tuple_to_nfattr,
+ .nfattr_to_tuple = ip_ct_port_nfattr_to_tuple,
+#endif
};
#ifdef CONFIG_SYSCTL
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
index 809dfed766d4..f23ef1f88c46 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
@@ -336,6 +336,23 @@ static int tcp_print_conntrack(struct seq_file *s,
return seq_printf(s, "%s ", tcp_conntrack_names[state]);
}
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+static int tcp_to_nfattr(struct sk_buff *skb, struct nfattr *nfa,
+ const struct ip_conntrack *ct)
+{
+ read_lock_bh(&tcp_lock);
+ NFA_PUT(skb, CTA_PROTOINFO_TCP_STATE, sizeof(u_int8_t),
+ &ct->proto.tcp.state);
+ read_unlock_bh(&tcp_lock);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+#endif
+
static unsigned int get_conntrack_index(const struct tcphdr *tcph)
{
if (tcph->rst) return TCP_RST_SET;
@@ -699,7 +716,7 @@ static int tcp_in_window(struct ip_ct_tcp *state,
res = 1;
} else {
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: %s ",
before(seq, sender->td_maxend + 1) ?
after(end, sender->td_end - receiver->td_maxwin - 1) ?
@@ -798,7 +815,7 @@ static int tcp_error(struct sk_buff *skb,
sizeof(_tcph), &_tcph);
if (th == NULL) {
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: short packet ");
return -NF_ACCEPT;
}
@@ -806,7 +823,7 @@ static int tcp_error(struct sk_buff *skb,
/* Not whole TCP header or malformed packet */
if (th->doff*4 < sizeof(struct tcphdr) || tcplen < th->doff*4) {
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: truncated/malformed packet ");
return -NF_ACCEPT;
}
@@ -823,7 +840,7 @@ static int tcp_error(struct sk_buff *skb,
skb->ip_summed == CHECKSUM_HW ? skb->csum
: skb_checksum(skb, iph->ihl*4, tcplen, 0))) {
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: bad TCP checksum ");
return -NF_ACCEPT;
}
@@ -832,7 +849,7 @@ static int tcp_error(struct sk_buff *skb,
tcpflags = (((u_int8_t *)th)[13] & ~(TH_ECE|TH_CWR));
if (!tcp_valid_flags[tcpflags]) {
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: invalid TCP flag combination ");
return -NF_ACCEPT;
}
@@ -880,8 +897,9 @@ static int tcp_packet(struct ip_conntrack *conntrack,
*/
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
- "ip_ct_tcp: killing out of sync session ");
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ NULL, "ip_ct_tcp: "
+ "killing out of sync session ");
if (del_timer(&conntrack->timeout))
conntrack->timeout.function((unsigned long)
conntrack);
@@ -895,7 +913,7 @@ static int tcp_packet(struct ip_conntrack *conntrack,
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: invalid packet ignored ");
return NF_ACCEPT;
case TCP_CONNTRACK_MAX:
@@ -905,7 +923,7 @@ static int tcp_packet(struct ip_conntrack *conntrack,
old_state);
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_tcp: invalid state ");
return -NF_ACCEPT;
case TCP_CONNTRACK_SYN_SENT:
@@ -926,7 +944,7 @@ static int tcp_packet(struct ip_conntrack *conntrack,
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
nf_log_packet(PF_INET, 0, skb, NULL, NULL,
- "ip_ct_tcp: invalid SYN");
+ NULL, "ip_ct_tcp: invalid SYN");
return -NF_ACCEPT;
}
case TCP_CONNTRACK_CLOSE:
@@ -973,6 +991,10 @@ static int tcp_packet(struct ip_conntrack *conntrack,
? ip_ct_tcp_timeout_max_retrans : *tcp_timeouts[new_state];
write_unlock_bh(&tcp_lock);
+ ip_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb);
+ if (new_state != old_state)
+ ip_conntrack_event_cache(IPCT_PROTOINFO, skb);
+
if (!test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)) {
/* If only reply is a RST, we can consider ourselves not to
have an established connection: this is a fairly common
@@ -1096,4 +1118,10 @@ struct ip_conntrack_protocol ip_conntrack_protocol_tcp =
.packet = tcp_packet,
.new = tcp_new,
.error = tcp_error,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .to_nfattr = tcp_to_nfattr,
+ .tuple_to_nfattr = ip_ct_port_tuple_to_nfattr,
+ .nfattr_to_tuple = ip_ct_port_nfattr_to_tuple,
+#endif
};
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_udp.c b/net/ipv4/netfilter/ip_conntrack_proto_udp.c
index 8c1eaba098d4..f2dcac7c7660 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_udp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_udp.c
@@ -73,7 +73,8 @@ static int udp_packet(struct ip_conntrack *conntrack,
ip_ct_refresh_acct(conntrack, ctinfo, skb,
ip_ct_udp_timeout_stream);
/* Also, more likely to be important, and not a probe */
- set_bit(IPS_ASSURED_BIT, &conntrack->status);
+ if (!test_and_set_bit(IPS_ASSURED_BIT, &conntrack->status))
+ ip_conntrack_event_cache(IPCT_STATUS, skb);
} else
ip_ct_refresh_acct(conntrack, ctinfo, skb, ip_ct_udp_timeout);
@@ -97,7 +98,7 @@ static int udp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo,
hdr = skb_header_pointer(skb, iph->ihl*4, sizeof(_hdr), &_hdr);
if (hdr == NULL) {
if (LOG_INVALID(IPPROTO_UDP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_udp: short packet ");
return -NF_ACCEPT;
}
@@ -105,7 +106,7 @@ static int udp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo,
/* Truncated/malformed packets */
if (ntohs(hdr->len) > udplen || ntohs(hdr->len) < sizeof(*hdr)) {
if (LOG_INVALID(IPPROTO_UDP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_udp: truncated/malformed packet ");
return -NF_ACCEPT;
}
@@ -125,7 +126,7 @@ static int udp_error(struct sk_buff *skb, enum ip_conntrack_info *ctinfo,
skb->ip_summed == CHECKSUM_HW ? skb->csum
: skb_checksum(skb, iph->ihl*4, udplen, 0))) {
if (LOG_INVALID(IPPROTO_UDP))
- nf_log_packet(PF_INET, 0, skb, NULL, NULL,
+ nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"ip_ct_udp: bad UDP checksum ");
return -NF_ACCEPT;
}
@@ -144,4 +145,9 @@ struct ip_conntrack_protocol ip_conntrack_protocol_udp =
.packet = udp_packet,
.new = udp_new,
.error = udp_error,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .tuple_to_nfattr = ip_ct_port_tuple_to_nfattr,
+ .nfattr_to_tuple = ip_ct_port_nfattr_to_tuple,
+#endif
};
diff --git a/net/ipv4/netfilter/ip_conntrack_standalone.c b/net/ipv4/netfilter/ip_conntrack_standalone.c
index 61798c46e91d..ee5895afd0c3 100644
--- a/net/ipv4/netfilter/ip_conntrack_standalone.c
+++ b/net/ipv4/netfilter/ip_conntrack_standalone.c
@@ -5,7 +5,7 @@
*/
/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
+ * (C) 2002-2005 Netfilter Core Team <coreteam@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -147,8 +147,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
if (DIRECTION(hash))
return 0;
- proto = ip_ct_find_proto(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
- .tuple.dst.protonum);
+ proto = __ip_conntrack_proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
IP_NF_ASSERT(proto);
if (seq_printf(s, "%-8s %u %ld ",
@@ -185,7 +184,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
return -ENOSPC;
#if defined(CONFIG_IP_NF_CONNTRACK_MARK)
- if (seq_printf(s, "mark=%lu ", conntrack->mark))
+ if (seq_printf(s, "mark=%u ", conntrack->mark))
return -ENOSPC;
#endif
@@ -283,7 +282,7 @@ static int exp_seq_show(struct seq_file *s, void *v)
seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);
print_tuple(s, &expect->tuple,
- ip_ct_find_proto(expect->tuple.dst.protonum));
+ __ip_conntrack_proto_find(expect->tuple.dst.protonum));
return seq_putc(s, '\n');
}
@@ -889,6 +888,7 @@ static int init_or_cleanup(int init)
return ret;
cleanup:
+ synchronize_net();
#ifdef CONFIG_SYSCTL
unregister_sysctl_table(ip_ct_sysctl_header);
cleanup_localinops:
@@ -971,6 +971,14 @@ void need_ip_conntrack(void)
{
}
+#ifdef CONFIG_IP_NF_CONNTRACK_EVENTS
+EXPORT_SYMBOL_GPL(ip_conntrack_chain);
+EXPORT_SYMBOL_GPL(ip_conntrack_expect_chain);
+EXPORT_SYMBOL_GPL(ip_conntrack_register_notifier);
+EXPORT_SYMBOL_GPL(ip_conntrack_unregister_notifier);
+EXPORT_SYMBOL_GPL(__ip_ct_event_cache_init);
+EXPORT_PER_CPU_SYMBOL_GPL(ip_conntrack_ecache);
+#endif
EXPORT_SYMBOL(ip_conntrack_protocol_register);
EXPORT_SYMBOL(ip_conntrack_protocol_unregister);
EXPORT_SYMBOL(ip_ct_get_tuple);
@@ -982,12 +990,16 @@ EXPORT_SYMBOL(ip_conntrack_helper_register);
EXPORT_SYMBOL(ip_conntrack_helper_unregister);
EXPORT_SYMBOL(ip_ct_iterate_cleanup);
EXPORT_SYMBOL(ip_ct_refresh_acct);
-EXPORT_SYMBOL(ip_ct_protos);
-EXPORT_SYMBOL(ip_ct_find_proto);
+
EXPORT_SYMBOL(ip_conntrack_expect_alloc);
EXPORT_SYMBOL(ip_conntrack_expect_put);
+EXPORT_SYMBOL_GPL(ip_conntrack_expect_find_get);
EXPORT_SYMBOL(ip_conntrack_expect_related);
EXPORT_SYMBOL(ip_conntrack_unexpect_related);
+EXPORT_SYMBOL_GPL(ip_conntrack_expect_list);
+EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find);
+EXPORT_SYMBOL_GPL(__ip_ct_expect_unlink_destroy);
+
EXPORT_SYMBOL(ip_conntrack_tuple_taken);
EXPORT_SYMBOL(ip_ct_gather_frags);
EXPORT_SYMBOL(ip_conntrack_htable_size);
@@ -995,7 +1007,28 @@ EXPORT_SYMBOL(ip_conntrack_lock);
EXPORT_SYMBOL(ip_conntrack_hash);
EXPORT_SYMBOL(ip_conntrack_untracked);
EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
-EXPORT_SYMBOL_GPL(ip_conntrack_put);
#ifdef CONFIG_IP_NF_NAT_NEEDED
EXPORT_SYMBOL(ip_conntrack_tcp_update);
#endif
+
+EXPORT_SYMBOL_GPL(ip_conntrack_flush);
+EXPORT_SYMBOL_GPL(__ip_conntrack_find);
+
+EXPORT_SYMBOL_GPL(ip_conntrack_alloc);
+EXPORT_SYMBOL_GPL(ip_conntrack_free);
+EXPORT_SYMBOL_GPL(ip_conntrack_hash_insert);
+
+EXPORT_SYMBOL_GPL(ip_ct_remove_expectations);
+
+EXPORT_SYMBOL_GPL(ip_conntrack_helper_find_get);
+EXPORT_SYMBOL_GPL(ip_conntrack_helper_put);
+EXPORT_SYMBOL_GPL(__ip_conntrack_helper_find_byname);
+
+EXPORT_SYMBOL_GPL(ip_conntrack_proto_find_get);
+EXPORT_SYMBOL_GPL(ip_conntrack_proto_put);
+EXPORT_SYMBOL_GPL(__ip_conntrack_proto_find);
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+EXPORT_SYMBOL_GPL(ip_ct_port_tuple_to_nfattr);
+EXPORT_SYMBOL_GPL(ip_ct_port_nfattr_to_tuple);
+#endif
diff --git a/net/ipv4/netfilter/ip_nat_core.c b/net/ipv4/netfilter/ip_nat_core.c
index 739b6dde1c82..1adedb743f60 100644
--- a/net/ipv4/netfilter/ip_nat_core.c
+++ b/net/ipv4/netfilter/ip_nat_core.c
@@ -47,8 +47,39 @@ DEFINE_RWLOCK(ip_nat_lock);
static unsigned int ip_nat_htable_size;
static struct list_head *bysource;
+
+#define MAX_IP_NAT_PROTO 256
struct ip_nat_protocol *ip_nat_protos[MAX_IP_NAT_PROTO];
+static inline struct ip_nat_protocol *
+__ip_nat_proto_find(u_int8_t protonum)
+{
+ return ip_nat_protos[protonum];
+}
+
+struct ip_nat_protocol *
+ip_nat_proto_find_get(u_int8_t protonum)
+{
+ struct ip_nat_protocol *p;
+
+ /* we need to disable preemption to make sure 'p' doesn't get
+ * removed until we've grabbed the reference */
+ preempt_disable();
+ p = __ip_nat_proto_find(protonum);
+ if (p) {
+ if (!try_module_get(p->me))
+ p = &ip_nat_unknown_protocol;
+ }
+ preempt_enable();
+
+ return p;
+}
+
+void
+ip_nat_proto_put(struct ip_nat_protocol *p)
+{
+ module_put(p->me);
+}
/* We keep an extra hash for each conntrack, for fast searching. */
static inline unsigned int
@@ -103,7 +134,8 @@ static int
in_range(const struct ip_conntrack_tuple *tuple,
const struct ip_nat_range *range)
{
- struct ip_nat_protocol *proto = ip_nat_find_proto(tuple->dst.protonum);
+ struct ip_nat_protocol *proto =
+ __ip_nat_proto_find(tuple->dst.protonum);
/* If we are supposed to map IPs, then we must be in the
range specified, otherwise let this drag us onto a new src IP. */
@@ -216,8 +248,7 @@ get_unique_tuple(struct ip_conntrack_tuple *tuple,
struct ip_conntrack *conntrack,
enum ip_nat_manip_type maniptype)
{
- struct ip_nat_protocol *proto
- = ip_nat_find_proto(orig_tuple->dst.protonum);
+ struct ip_nat_protocol *proto;
/* 1) If this srcip/proto/src-proto-part is currently mapped,
and that same mapping gives a unique tuple within the given
@@ -242,14 +273,20 @@ get_unique_tuple(struct ip_conntrack_tuple *tuple,
/* 3) The per-protocol part of the manip is made to map into
the range to make a unique tuple. */
+ proto = ip_nat_proto_find_get(orig_tuple->dst.protonum);
+
/* Only bother mapping if it's not already in range and unique */
if ((!(range->flags & IP_NAT_RANGE_PROTO_SPECIFIED)
|| proto->in_range(tuple, maniptype, &range->min, &range->max))
- && !ip_nat_used_tuple(tuple, conntrack))
+ && !ip_nat_used_tuple(tuple, conntrack)) {
+ ip_nat_proto_put(proto);
return;
+ }
/* Last change: get protocol to try to obtain unique tuple. */
proto->unique_tuple(tuple, range, maniptype, conntrack);
+
+ ip_nat_proto_put(proto);
}
unsigned int
@@ -320,17 +357,20 @@ manip_pkt(u_int16_t proto,
enum ip_nat_manip_type maniptype)
{
struct iphdr *iph;
+ struct ip_nat_protocol *p;
- (*pskb)->nfcache |= NFC_ALTERED;
- if (!skb_ip_make_writable(pskb, iphdroff + sizeof(*iph)))
+ if (!skb_make_writable(pskb, iphdroff + sizeof(*iph)))
return 0;
iph = (void *)(*pskb)->data + iphdroff;
/* Manipulate protcol part. */
- if (!ip_nat_find_proto(proto)->manip_pkt(pskb, iphdroff,
- target, maniptype))
+ p = ip_nat_proto_find_get(proto);
+ if (!p->manip_pkt(pskb, iphdroff, target, maniptype)) {
+ ip_nat_proto_put(p);
return 0;
+ }
+ ip_nat_proto_put(p);
iph = (void *)(*pskb)->data + iphdroff;
@@ -391,7 +431,7 @@ int icmp_reply_translation(struct sk_buff **pskb,
struct ip_conntrack_tuple inner, target;
int hdrlen = (*pskb)->nh.iph->ihl * 4;
- if (!skb_ip_make_writable(pskb, hdrlen + sizeof(*inside)))
+ if (!skb_make_writable(pskb, hdrlen + sizeof(*inside)))
return 0;
inside = (void *)(*pskb)->data + (*pskb)->nh.iph->ihl*4;
@@ -426,7 +466,8 @@ int icmp_reply_translation(struct sk_buff **pskb,
if (!ip_ct_get_tuple(&inside->ip, *pskb, (*pskb)->nh.iph->ihl*4 +
sizeof(struct icmphdr) + inside->ip.ihl*4,
- &inner, ip_ct_find_proto(inside->ip.protocol)))
+ &inner,
+ __ip_conntrack_proto_find(inside->ip.protocol)))
return 0;
/* Change inner back to look like incoming packet. We do the
@@ -496,6 +537,49 @@ void ip_nat_protocol_unregister(struct ip_nat_protocol *proto)
synchronize_net();
}
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+int
+ip_nat_port_range_to_nfattr(struct sk_buff *skb,
+ const struct ip_nat_range *range)
+{
+ NFA_PUT(skb, CTA_PROTONAT_PORT_MIN, sizeof(u_int16_t),
+ &range->min.tcp.port);
+ NFA_PUT(skb, CTA_PROTONAT_PORT_MAX, sizeof(u_int16_t),
+ &range->max.tcp.port);
+
+ return 0;
+
+nfattr_failure:
+ return -1;
+}
+
+int
+ip_nat_port_nfattr_to_range(struct nfattr *tb[], struct ip_nat_range *range)
+{
+ int ret = 0;
+
+ /* we have to return whether we actually parsed something or not */
+
+ if (tb[CTA_PROTONAT_PORT_MIN-1]) {
+ ret = 1;
+ range->min.tcp.port =
+ *(u_int16_t *)NFA_DATA(tb[CTA_PROTONAT_PORT_MIN-1]);
+ }
+
+ if (!tb[CTA_PROTONAT_PORT_MAX-1]) {
+ if (ret)
+ range->max.tcp.port = range->min.tcp.port;
+ } else {
+ ret = 1;
+ range->max.tcp.port =
+ *(u_int16_t *)NFA_DATA(tb[CTA_PROTONAT_PORT_MAX-1]);
+ }
+
+ return ret;
+}
+#endif
+
int __init ip_nat_init(void)
{
size_t i;
diff --git a/net/ipv4/netfilter/ip_nat_helper.c b/net/ipv4/netfilter/ip_nat_helper.c
index 158f34f32c04..d2dd5d313556 100644
--- a/net/ipv4/netfilter/ip_nat_helper.c
+++ b/net/ipv4/netfilter/ip_nat_helper.c
@@ -168,7 +168,7 @@ ip_nat_mangle_tcp_packet(struct sk_buff **pskb,
struct tcphdr *tcph;
int datalen;
- if (!skb_ip_make_writable(pskb, (*pskb)->len))
+ if (!skb_make_writable(pskb, (*pskb)->len))
return 0;
if (rep_len > match_len
@@ -228,7 +228,7 @@ ip_nat_mangle_udp_packet(struct sk_buff **pskb,
match_offset + match_len)
return 0;
- if (!skb_ip_make_writable(pskb, (*pskb)->len))
+ if (!skb_make_writable(pskb, (*pskb)->len))
return 0;
if (rep_len > match_len
@@ -315,7 +315,7 @@ ip_nat_sack_adjust(struct sk_buff **pskb,
optoff = (*pskb)->nh.iph->ihl*4 + sizeof(struct tcphdr);
optend = (*pskb)->nh.iph->ihl*4 + tcph->doff*4;
- if (!skb_ip_make_writable(pskb, optend))
+ if (!skb_make_writable(pskb, optend))
return 0;
dir = CTINFO2DIR(ctinfo);
@@ -363,7 +363,7 @@ ip_nat_seq_adjust(struct sk_buff **pskb,
this_way = &ct->nat.info.seq[dir];
other_way = &ct->nat.info.seq[!dir];
- if (!skb_ip_make_writable(pskb, (*pskb)->nh.iph->ihl*4+sizeof(*tcph)))
+ if (!skb_make_writable(pskb, (*pskb)->nh.iph->ihl*4+sizeof(*tcph)))
return 0;
tcph = (void *)(*pskb)->data + (*pskb)->nh.iph->ihl*4;
diff --git a/net/ipv4/netfilter/ip_nat_proto_icmp.c b/net/ipv4/netfilter/ip_nat_proto_icmp.c
index 6596c9ee1655..938719043999 100644
--- a/net/ipv4/netfilter/ip_nat_proto_icmp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_icmp.c
@@ -62,7 +62,7 @@ icmp_manip_pkt(struct sk_buff **pskb,
struct icmphdr *hdr;
unsigned int hdroff = iphdroff + iph->ihl*4;
- if (!skb_ip_make_writable(pskb, hdroff + sizeof(*hdr)))
+ if (!skb_make_writable(pskb, hdroff + sizeof(*hdr)))
return 0;
hdr = (struct icmphdr *)((*pskb)->data + hdroff);
@@ -106,11 +106,18 @@ icmp_print_range(char *buffer, const struct ip_nat_range *range)
else return 0;
}
-struct ip_nat_protocol ip_nat_protocol_icmp
-= { "ICMP", IPPROTO_ICMP,
- icmp_manip_pkt,
- icmp_in_range,
- icmp_unique_tuple,
- icmp_print,
- icmp_print_range
+struct ip_nat_protocol ip_nat_protocol_icmp = {
+ .name = "ICMP",
+ .protonum = IPPROTO_ICMP,
+ .me = THIS_MODULE,
+ .manip_pkt = icmp_manip_pkt,
+ .in_range = icmp_in_range,
+ .unique_tuple = icmp_unique_tuple,
+ .print = icmp_print,
+ .print_range = icmp_print_range,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .range_to_nfattr = ip_nat_port_range_to_nfattr,
+ .nfattr_to_range = ip_nat_port_nfattr_to_range,
+#endif
};
diff --git a/net/ipv4/netfilter/ip_nat_proto_tcp.c b/net/ipv4/netfilter/ip_nat_proto_tcp.c
index a98e36d2b3c6..1d381bf68574 100644
--- a/net/ipv4/netfilter/ip_nat_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_tcp.c
@@ -12,6 +12,7 @@
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/if.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
#include <linux/netfilter_ipv4/ip_nat.h>
#include <linux/netfilter_ipv4/ip_nat_rule.h>
#include <linux/netfilter_ipv4/ip_nat_protocol.h>
@@ -102,7 +103,7 @@ tcp_manip_pkt(struct sk_buff **pskb,
if ((*pskb)->len >= hdroff + sizeof(struct tcphdr))
hdrsize = sizeof(struct tcphdr);
- if (!skb_ip_make_writable(pskb, hdroff + hdrsize))
+ if (!skb_make_writable(pskb, hdroff + hdrsize))
return 0;
iph = (struct iphdr *)((*pskb)->data + iphdroff);
@@ -169,11 +170,18 @@ tcp_print_range(char *buffer, const struct ip_nat_range *range)
else return 0;
}
-struct ip_nat_protocol ip_nat_protocol_tcp
-= { "TCP", IPPROTO_TCP,
- tcp_manip_pkt,
- tcp_in_range,
- tcp_unique_tuple,
- tcp_print,
- tcp_print_range
+struct ip_nat_protocol ip_nat_protocol_tcp = {
+ .name = "TCP",
+ .protonum = IPPROTO_TCP,
+ .me = THIS_MODULE,
+ .manip_pkt = tcp_manip_pkt,
+ .in_range = tcp_in_range,
+ .unique_tuple = tcp_unique_tuple,
+ .print = tcp_print,
+ .print_range = tcp_print_range,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .range_to_nfattr = ip_nat_port_range_to_nfattr,
+ .nfattr_to_range = ip_nat_port_nfattr_to_range,
+#endif
};
diff --git a/net/ipv4/netfilter/ip_nat_proto_udp.c b/net/ipv4/netfilter/ip_nat_proto_udp.c
index 9f66e5625664..c4906e1aa24a 100644
--- a/net/ipv4/netfilter/ip_nat_proto_udp.c
+++ b/net/ipv4/netfilter/ip_nat_proto_udp.c
@@ -94,7 +94,7 @@ udp_manip_pkt(struct sk_buff **pskb,
u32 oldip, newip;
u16 *portptr, newport;
- if (!skb_ip_make_writable(pskb, hdroff + sizeof(*hdr)))
+ if (!skb_make_writable(pskb, hdroff + sizeof(*hdr)))
return 0;
iph = (struct iphdr *)((*pskb)->data + iphdroff);
@@ -156,11 +156,18 @@ udp_print_range(char *buffer, const struct ip_nat_range *range)
else return 0;
}
-struct ip_nat_protocol ip_nat_protocol_udp
-= { "UDP", IPPROTO_UDP,
- udp_manip_pkt,
- udp_in_range,
- udp_unique_tuple,
- udp_print,
- udp_print_range
+struct ip_nat_protocol ip_nat_protocol_udp = {
+ .name = "UDP",
+ .protonum = IPPROTO_UDP,
+ .me = THIS_MODULE,
+ .manip_pkt = udp_manip_pkt,
+ .in_range = udp_in_range,
+ .unique_tuple = udp_unique_tuple,
+ .print = udp_print,
+ .print_range = udp_print_range,
+#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
+ defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
+ .range_to_nfattr = ip_nat_port_range_to_nfattr,
+ .nfattr_to_range = ip_nat_port_nfattr_to_range,
+#endif
};
diff --git a/net/ipv4/netfilter/ip_nat_proto_unknown.c b/net/ipv4/netfilter/ip_nat_proto_unknown.c
index f5525bd58d16..99bbef56f84e 100644
--- a/net/ipv4/netfilter/ip_nat_proto_unknown.c
+++ b/net/ipv4/netfilter/ip_nat_proto_unknown.c
@@ -61,10 +61,11 @@ unknown_print_range(char *buffer, const struct ip_nat_range *range)
}
struct ip_nat_protocol ip_nat_unknown_protocol = {
- "unknown", 0,
- unknown_manip_pkt,
- unknown_in_range,
- unknown_unique_tuple,
- unknown_print,
- unknown_print_range
+ .name = "unknown",
+ .me = THIS_MODULE,
+ .manip_pkt = unknown_manip_pkt,
+ .in_range = unknown_in_range,
+ .unique_tuple = unknown_unique_tuple,
+ .print = unknown_print,
+ .print_range = unknown_print_range
};
diff --git a/net/ipv4/netfilter/ip_nat_snmp_basic.c b/net/ipv4/netfilter/ip_nat_snmp_basic.c
index 2a48b6e635ae..93b2c5111bb2 100644
--- a/net/ipv4/netfilter/ip_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/ip_nat_snmp_basic.c
@@ -1275,7 +1275,7 @@ static int help(struct sk_buff **pskb,
return NF_DROP;
}
- if (!skb_ip_make_writable(pskb, (*pskb)->len))
+ if (!skb_make_writable(pskb, (*pskb)->len))
return NF_DROP;
spin_lock_bh(&snmp_lock);
diff --git a/net/ipv4/netfilter/ip_nat_standalone.c b/net/ipv4/netfilter/ip_nat_standalone.c
index 91d5ea1dbbc9..89db052add81 100644
--- a/net/ipv4/netfilter/ip_nat_standalone.c
+++ b/net/ipv4/netfilter/ip_nat_standalone.c
@@ -73,8 +73,6 @@ ip_nat_fn(unsigned int hooknum,
IP_NF_ASSERT(!((*pskb)->nh.iph->frag_off
& htons(IP_MF|IP_OFFSET)));
- (*pskb)->nfcache |= NFC_UNKNOWN;
-
/* If we had a hardware checksum before, it's now invalid */
if ((*pskb)->ip_summed == CHECKSUM_HW)
if (skb_checksum_help(*pskb, (out == NULL)))
@@ -396,6 +394,8 @@ module_exit(fini);
EXPORT_SYMBOL(ip_nat_setup_info);
EXPORT_SYMBOL(ip_nat_protocol_register);
EXPORT_SYMBOL(ip_nat_protocol_unregister);
+EXPORT_SYMBOL_GPL(ip_nat_proto_find_get);
+EXPORT_SYMBOL_GPL(ip_nat_proto_put);
EXPORT_SYMBOL(ip_nat_cheat_check);
EXPORT_SYMBOL(ip_nat_mangle_tcp_packet);
EXPORT_SYMBOL(ip_nat_mangle_udp_packet);
diff --git a/net/ipv4/netfilter/ip_queue.c b/net/ipv4/netfilter/ip_queue.c
index c6baa8174389..d54f14d926f6 100644
--- a/net/ipv4/netfilter/ip_queue.c
+++ b/net/ipv4/netfilter/ip_queue.c
@@ -43,17 +43,10 @@
#define NET_IPQ_QMAX 2088
#define NET_IPQ_QMAX_NAME "ip_queue_maxlen"
-struct ipq_rt_info {
- __u8 tos;
- __u32 daddr;
- __u32 saddr;
-};
-
struct ipq_queue_entry {
struct list_head list;
struct nf_info *info;
struct sk_buff *skb;
- struct ipq_rt_info rt_info;
};
typedef int (*ipq_cmpfn)(struct ipq_queue_entry *, unsigned long);
@@ -247,8 +240,8 @@ ipq_build_packet_message(struct ipq_queue_entry *entry, int *errp)
pmsg->packet_id = (unsigned long )entry;
pmsg->data_len = data_len;
- pmsg->timestamp_sec = entry->skb->stamp.tv_sec;
- pmsg->timestamp_usec = entry->skb->stamp.tv_usec;
+ pmsg->timestamp_sec = skb_tv_base.tv_sec + entry->skb->tstamp.off_sec;
+ pmsg->timestamp_usec = skb_tv_base.tv_usec + entry->skb->tstamp.off_usec;
pmsg->mark = entry->skb->nfmark;
pmsg->hook = entry->info->hook;
pmsg->hw_protocol = entry->skb->protocol;
@@ -287,7 +280,8 @@ nlmsg_failure:
}
static int
-ipq_enqueue_packet(struct sk_buff *skb, struct nf_info *info, void *data)
+ipq_enqueue_packet(struct sk_buff *skb, struct nf_info *info,
+ unsigned int queuenum, void *data)
{
int status = -EINVAL;
struct sk_buff *nskb;
@@ -305,14 +299,6 @@ ipq_enqueue_packet(struct sk_buff *skb, struct nf_info *info, void *data)
entry->info = info;
entry->skb = skb;
- if (entry->info->hook == NF_IP_LOCAL_OUT) {
- struct iphdr *iph = skb->nh.iph;
-
- entry->rt_info.tos = iph->tos;
- entry->rt_info.daddr = iph->daddr;
- entry->rt_info.saddr = iph->saddr;
- }
-
nskb = ipq_build_packet_message(entry, &status);
if (nskb == NULL)
goto err_out_free;
@@ -388,24 +374,11 @@ ipq_mangle_ipv4(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
}
skb_put(e->skb, diff);
}
- if (!skb_ip_make_writable(&e->skb, v->data_len))
+ if (!skb_make_writable(&e->skb, v->data_len))
return -ENOMEM;
memcpy(e->skb->data, v->payload, v->data_len);
e->skb->ip_summed = CHECKSUM_NONE;
- e->skb->nfcache |= NFC_ALTERED;
-
- /*
- * Extra routing may needed on local out, as the QUEUE target never
- * returns control to the table.
- */
- if (e->info->hook == NF_IP_LOCAL_OUT) {
- struct iphdr *iph = e->skb->nh.iph;
-
- if (!(iph->tos == e->rt_info.tos
- && iph->daddr == e->rt_info.daddr
- && iph->saddr == e->rt_info.saddr))
- return ip_route_me_harder(&e->skb);
- }
+
return 0;
}
@@ -683,6 +656,11 @@ ipq_get_info(char *buffer, char **start, off_t offset, int length)
}
#endif /* CONFIG_PROC_FS */
+static struct nf_queue_handler nfqh = {
+ .name = "ip_queue",
+ .outfn = &ipq_enqueue_packet,
+};
+
static int
init_or_cleanup(int init)
{
@@ -693,7 +671,8 @@ init_or_cleanup(int init)
goto cleanup;
netlink_register_notifier(&ipq_nl_notifier);
- ipqnl = netlink_kernel_create(NETLINK_FIREWALL, ipq_rcv_sk);
+ ipqnl = netlink_kernel_create(NETLINK_FIREWALL, 0, ipq_rcv_sk,
+ THIS_MODULE);
if (ipqnl == NULL) {
printk(KERN_ERR "ip_queue: failed to create netlink socket\n");
goto cleanup_netlink_notifier;
@@ -710,7 +689,7 @@ init_or_cleanup(int init)
register_netdevice_notifier(&ipq_dev_notifier);
ipq_sysctl_header = register_sysctl_table(ipq_root_table, 0);
- status = nf_register_queue_handler(PF_INET, ipq_enqueue_packet, NULL);
+ status = nf_register_queue_handler(PF_INET, &nfqh);
if (status < 0) {
printk(KERN_ERR "ip_queue: failed to register queue handler\n");
goto cleanup_sysctl;
@@ -718,7 +697,7 @@ init_or_cleanup(int init)
return status;
cleanup:
- nf_unregister_queue_handler(PF_INET);
+ nf_unregister_queue_handlers(&nfqh);
synchronize_net();
ipq_flush(NF_DROP);
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index c88dfcd38c56..eef99a1b5de6 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -312,7 +312,6 @@ ipt_do_table(struct sk_buff **pskb,
do {
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
- (*pskb)->nfcache |= e->nfcache;
if (ip_packet_match(ip, indev, outdev, &e->ip, offset)) {
struct ipt_entry_target *t;
@@ -341,8 +340,8 @@ ipt_do_table(struct sk_buff **pskb,
back->comefrom);
continue;
}
- if (table_base + v
- != (void *)e + e->next_offset) {
+ if (table_base + v != (void *)e + e->next_offset
+ && !(e->ip.flags & IPT_F_GOTO)) {
/* Save old back ptr in next entry */
struct ipt_entry *next
= (void *)e + e->next_offset;
diff --git a/net/ipv4/netfilter/ipt_CLASSIFY.c b/net/ipv4/netfilter/ipt_CLASSIFY.c
index 9842e6e23184..dab78d8bd494 100644
--- a/net/ipv4/netfilter/ipt_CLASSIFY.c
+++ b/net/ipv4/netfilter/ipt_CLASSIFY.c
@@ -32,10 +32,8 @@ target(struct sk_buff **pskb,
{
const struct ipt_classify_target_info *clinfo = targinfo;
- if((*pskb)->priority != clinfo->priority) {
+ if((*pskb)->priority != clinfo->priority)
(*pskb)->priority = clinfo->priority;
- (*pskb)->nfcache |= NFC_ALTERED;
- }
return IPT_CONTINUE;
}
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 6706d3a1bc4f..2d05cafec221 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -367,7 +367,7 @@ target(struct sk_buff **pskb,
#ifdef DEBUG_CLUSTERP
DUMP_TUPLE(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple);
#endif
- DEBUGP("hash=%u ct_hash=%lu ", hash, ct->mark);
+ DEBUGP("hash=%u ct_hash=%u ", hash, ct->mark);
if (!clusterip_responsible(cipinfo->config, hash)) {
DEBUGP("not responsible\n");
return NF_DROP;
diff --git a/net/ipv4/netfilter/ipt_CONNMARK.c b/net/ipv4/netfilter/ipt_CONNMARK.c
index 30ddd3e18eb7..134638021339 100644
--- a/net/ipv4/netfilter/ipt_CONNMARK.c
+++ b/net/ipv4/netfilter/ipt_CONNMARK.c
@@ -40,9 +40,9 @@ target(struct sk_buff **pskb,
void *userinfo)
{
const struct ipt_connmark_target_info *markinfo = targinfo;
- unsigned long diff;
- unsigned long nfmark;
- unsigned long newmark;
+ u_int32_t diff;
+ u_int32_t nfmark;
+ u_int32_t newmark;
enum ip_conntrack_info ctinfo;
struct ip_conntrack *ct = ip_conntrack_get((*pskb), &ctinfo);
@@ -61,10 +61,8 @@ target(struct sk_buff **pskb,
case IPT_CONNMARK_RESTORE:
nfmark = (*pskb)->nfmark;
diff = (ct->mark ^ nfmark) & markinfo->mask;
- if (diff != 0) {
+ if (diff != 0)
(*pskb)->nfmark = nfmark ^ diff;
- (*pskb)->nfcache |= NFC_ALTERED;
- }
break;
}
}
@@ -94,6 +92,11 @@ checkentry(const char *tablename,
}
}
+ if (matchinfo->mark > 0xffffffff || matchinfo->mask > 0xffffffff) {
+ printk(KERN_WARNING "CONNMARK: Only supports 32bit mark\n");
+ return 0;
+ }
+
return 1;
}
diff --git a/net/ipv4/netfilter/ipt_DSCP.c b/net/ipv4/netfilter/ipt_DSCP.c
index 3ea4509099f9..6e319570a28c 100644
--- a/net/ipv4/netfilter/ipt_DSCP.c
+++ b/net/ipv4/netfilter/ipt_DSCP.c
@@ -39,7 +39,7 @@ target(struct sk_buff **pskb,
if (((*pskb)->nh.iph->tos & IPT_DSCP_MASK) != sh_dscp) {
u_int16_t diffs[2];
- if (!skb_ip_make_writable(pskb, sizeof(struct iphdr)))
+ if (!skb_make_writable(pskb, sizeof(struct iphdr)))
return NF_DROP;
diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF;
@@ -51,7 +51,6 @@ target(struct sk_buff **pskb,
sizeof(diffs),
(*pskb)->nh.iph->check
^ 0xFFFF));
- (*pskb)->nfcache |= NFC_ALTERED;
}
return IPT_CONTINUE;
}
diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c
index 94a0ce1c1c9d..a1319693f648 100644
--- a/net/ipv4/netfilter/ipt_ECN.c
+++ b/net/ipv4/netfilter/ipt_ECN.c
@@ -31,7 +31,7 @@ set_ect_ip(struct sk_buff **pskb, const struct ipt_ECN_info *einfo)
!= (einfo->ip_ect & IPT_ECN_IP_MASK)) {
u_int16_t diffs[2];
- if (!skb_ip_make_writable(pskb, sizeof(struct iphdr)))
+ if (!skb_make_writable(pskb, sizeof(struct iphdr)))
return 0;
diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF;
@@ -43,7 +43,6 @@ set_ect_ip(struct sk_buff **pskb, const struct ipt_ECN_info *einfo)
sizeof(diffs),
(*pskb)->nh.iph->check
^0xFFFF));
- (*pskb)->nfcache |= NFC_ALTERED;
}
return 1;
}
@@ -67,7 +66,7 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
tcph->cwr == einfo->proto.tcp.cwr)))
return 1;
- if (!skb_ip_make_writable(pskb, (*pskb)->nh.iph->ihl*4+sizeof(*tcph)))
+ if (!skb_make_writable(pskb, (*pskb)->nh.iph->ihl*4+sizeof(*tcph)))
return 0;
tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4;
@@ -87,7 +86,6 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward)
tcph->check = csum_fold(csum_partial((char *)diffs,
sizeof(diffs),
tcph->check^0xFFFF));
- (*pskb)->nfcache |= NFC_ALTERED;
return 1;
}
diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index ef08733d26da..92ed050fac69 100644
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -27,10 +27,6 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("iptables syslog logging module");
-static unsigned int nflog = 1;
-module_param(nflog, int, 0400);
-MODULE_PARM_DESC(nflog, "register as internal netfilter logging module");
-
#if 0
#define DEBUGP printk
#else
@@ -41,11 +37,17 @@ MODULE_PARM_DESC(nflog, "register as internal netfilter logging module");
static DEFINE_SPINLOCK(log_lock);
/* One level of recursion won't kill us */
-static void dump_packet(const struct ipt_log_info *info,
+static void dump_packet(const struct nf_loginfo *info,
const struct sk_buff *skb,
unsigned int iphoff)
{
struct iphdr _iph, *ih;
+ unsigned int logflags;
+
+ if (info->type == NF_LOG_TYPE_LOG)
+ logflags = info->u.log.logflags;
+ else
+ logflags = NF_LOG_MASK;
ih = skb_header_pointer(skb, iphoff, sizeof(_iph), &_iph);
if (ih == NULL) {
@@ -76,7 +78,7 @@ static void dump_packet(const struct ipt_log_info *info,
if (ntohs(ih->frag_off) & IP_OFFSET)
printk("FRAG:%u ", ntohs(ih->frag_off) & IP_OFFSET);
- if ((info->logflags & IPT_LOG_IPOPT)
+ if ((logflags & IPT_LOG_IPOPT)
&& ih->ihl * 4 > sizeof(struct iphdr)) {
unsigned char _opt[4 * 15 - sizeof(struct iphdr)], *op;
unsigned int i, optsize;
@@ -119,7 +121,7 @@ static void dump_packet(const struct ipt_log_info *info,
printk("SPT=%u DPT=%u ",
ntohs(th->source), ntohs(th->dest));
/* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
- if (info->logflags & IPT_LOG_TCPSEQ)
+ if (logflags & IPT_LOG_TCPSEQ)
printk("SEQ=%u ACK=%u ",
ntohl(th->seq), ntohl(th->ack_seq));
/* Max length: 13 "WINDOW=65535 " */
@@ -146,7 +148,7 @@ static void dump_packet(const struct ipt_log_info *info,
/* Max length: 11 "URGP=65535 " */
printk("URGP=%u ", ntohs(th->urg_ptr));
- if ((info->logflags & IPT_LOG_TCPOPT)
+ if ((logflags & IPT_LOG_TCPOPT)
&& th->doff * 4 > sizeof(struct tcphdr)) {
unsigned char _opt[4 * 15 - sizeof(struct tcphdr)];
unsigned char *op;
@@ -328,7 +330,7 @@ static void dump_packet(const struct ipt_log_info *info,
}
/* Max length: 15 "UID=4294967295 " */
- if ((info->logflags & IPT_LOG_UID) && !iphoff && skb->sk) {
+ if ((logflags & IPT_LOG_UID) && !iphoff && skb->sk) {
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->sk->sk_socket && skb->sk->sk_socket->file)
printk("UID=%u ", skb->sk->sk_socket->file->f_uid);
@@ -349,19 +351,31 @@ static void dump_packet(const struct ipt_log_info *info,
/* maxlen = 230+ 91 + 230 + 252 = 803 */
}
+struct nf_loginfo default_loginfo = {
+ .type = NF_LOG_TYPE_LOG,
+ .u = {
+ .log = {
+ .level = 0,
+ .logflags = NF_LOG_MASK,
+ },
+ },
+};
+
static void
-ipt_log_packet(unsigned int hooknum,
+ipt_log_packet(unsigned int pf,
+ unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
- const struct ipt_log_info *loginfo,
- const char *level_string,
+ const struct nf_loginfo *loginfo,
const char *prefix)
{
+ if (!loginfo)
+ loginfo = &default_loginfo;
+
spin_lock_bh(&log_lock);
- printk(level_string);
- printk("%sIN=%s OUT=%s ",
- prefix == NULL ? loginfo->prefix : prefix,
+ printk("<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
+ prefix,
in ? in->name : "",
out ? out->name : "");
#ifdef CONFIG_BRIDGE_NETFILTER
@@ -405,28 +419,15 @@ ipt_log_target(struct sk_buff **pskb,
void *userinfo)
{
const struct ipt_log_info *loginfo = targinfo;
- char level_string[4] = "< >";
+ struct nf_loginfo li;
- level_string[1] = '0' + (loginfo->level % 8);
- ipt_log_packet(hooknum, *pskb, in, out, loginfo, level_string, NULL);
+ li.type = NF_LOG_TYPE_LOG;
+ li.u.log.level = loginfo->level;
+ li.u.log.logflags = loginfo->logflags;
- return IPT_CONTINUE;
-}
+ nf_log_packet(PF_INET, hooknum, *pskb, in, out, &li, loginfo->prefix);
-static void
-ipt_logfn(unsigned int hooknum,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const char *prefix)
-{
- struct ipt_log_info loginfo = {
- .level = 0,
- .logflags = IPT_LOG_MASK,
- .prefix = ""
- };
-
- ipt_log_packet(hooknum, skb, in, out, &loginfo, KERN_WARNING, prefix);
+ return IPT_CONTINUE;
}
static int ipt_log_checkentry(const char *tablename,
@@ -464,20 +465,29 @@ static struct ipt_target ipt_log_reg = {
.me = THIS_MODULE,
};
+static struct nf_logger ipt_log_logger ={
+ .name = "ipt_LOG",
+ .logfn = &ipt_log_packet,
+ .me = THIS_MODULE,
+};
+
static int __init init(void)
{
if (ipt_register_target(&ipt_log_reg))
return -EINVAL;
- if (nflog)
- nf_log_register(PF_INET, &ipt_logfn);
+ if (nf_log_register(PF_INET, &ipt_log_logger) < 0) {
+ printk(KERN_WARNING "ipt_LOG: not logging via system console "
+ "since somebody else already registered for PF_INET\n");
+ /* we cannot make module load fail here, since otherwise
+ * iptables userspace would abort */
+ }
return 0;
}
static void __exit fini(void)
{
- if (nflog)
- nf_log_unregister(PF_INET, &ipt_logfn);
+ nf_log_unregister_logger(&ipt_log_logger);
ipt_unregister_target(&ipt_log_reg);
}
diff --git a/net/ipv4/netfilter/ipt_MARK.c b/net/ipv4/netfilter/ipt_MARK.c
index 33c6f9b63b8d..52b4f2c296bf 100644
--- a/net/ipv4/netfilter/ipt_MARK.c
+++ b/net/ipv4/netfilter/ipt_MARK.c
@@ -29,10 +29,9 @@ target_v0(struct sk_buff **pskb,
{
const struct ipt_mark_target_info *markinfo = targinfo;
- if((*pskb)->nfmark != markinfo->mark) {
+ if((*pskb)->nfmark != markinfo->mark)
(*pskb)->nfmark = markinfo->mark;
- (*pskb)->nfcache |= NFC_ALTERED;
- }
+
return IPT_CONTINUE;
}
@@ -61,10 +60,9 @@ target_v1(struct sk_buff **pskb,
break;
}
- if((*pskb)->nfmark != mark) {
+ if((*pskb)->nfmark != mark)
(*pskb)->nfmark = mark;
- (*pskb)->nfcache |= NFC_ALTERED;
- }
+
return IPT_CONTINUE;
}
@@ -76,6 +74,8 @@ checkentry_v0(const char *tablename,
unsigned int targinfosize,
unsigned int hook_mask)
{
+ struct ipt_mark_target_info *markinfo = targinfo;
+
if (targinfosize != IPT_ALIGN(sizeof(struct ipt_mark_target_info))) {
printk(KERN_WARNING "MARK: targinfosize %u != %Zu\n",
targinfosize,
@@ -88,6 +88,11 @@ checkentry_v0(const char *tablename,
return 0;
}
+ if (markinfo->mark > 0xffffffff) {
+ printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
+ return 0;
+ }
+
return 1;
}
@@ -120,6 +125,11 @@ checkentry_v1(const char *tablename,
return 0;
}
+ if (markinfo->mark > 0xffffffff) {
+ printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n");
+ return 0;
+ }
+
return 1;
}
diff --git a/net/ipv4/netfilter/ipt_MASQUERADE.c b/net/ipv4/netfilter/ipt_MASQUERADE.c
index 91e74502c3d3..2f3e181c8e97 100644
--- a/net/ipv4/netfilter/ipt_MASQUERADE.c
+++ b/net/ipv4/netfilter/ipt_MASQUERADE.c
@@ -86,11 +86,6 @@ masquerade_target(struct sk_buff **pskb,
IP_NF_ASSERT(hooknum == NF_IP_POST_ROUTING);
- /* FIXME: For the moment, don't do local packets, breaks
- testsuite for 2.3.49 --RR */
- if ((*pskb)->sk)
- return NF_ACCEPT;
-
ct = ip_conntrack_get(*pskb, &ctinfo);
IP_NF_ASSERT(ct && (ctinfo == IP_CT_NEW || ctinfo == IP_CT_RELATED
|| ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY));
diff --git a/net/ipv4/netfilter/ipt_NETMAP.c b/net/ipv4/netfilter/ipt_NETMAP.c
index 06254b29d034..e6e7b6095363 100644
--- a/net/ipv4/netfilter/ipt_NETMAP.c
+++ b/net/ipv4/netfilter/ipt_NETMAP.c
@@ -46,7 +46,8 @@ check(const char *tablename,
DEBUGP(MODULENAME":check: size %u.\n", targinfosize);
return 0;
}
- if (hook_mask & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_POST_ROUTING))) {
+ if (hook_mask & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_POST_ROUTING) |
+ (1 << NF_IP_LOCAL_OUT))) {
DEBUGP(MODULENAME":check: bad hooks %x.\n", hook_mask);
return 0;
}
@@ -76,12 +77,13 @@ target(struct sk_buff **pskb,
struct ip_nat_range newrange;
IP_NF_ASSERT(hooknum == NF_IP_PRE_ROUTING
- || hooknum == NF_IP_POST_ROUTING);
+ || hooknum == NF_IP_POST_ROUTING
+ || hooknum == NF_IP_LOCAL_OUT);
ct = ip_conntrack_get(*pskb, &ctinfo);
netmask = ~(mr->range[0].min_ip ^ mr->range[0].max_ip);
- if (hooknum == NF_IP_PRE_ROUTING)
+ if (hooknum == NF_IP_PRE_ROUTING || hooknum == NF_IP_LOCAL_OUT)
new_ip = (*pskb)->nh.iph->daddr & ~netmask;
else
new_ip = (*pskb)->nh.iph->saddr & ~netmask;
diff --git a/net/ipv4/netfilter/ipt_NFQUEUE.c b/net/ipv4/netfilter/ipt_NFQUEUE.c
new file mode 100644
index 000000000000..3cedc9be8807
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_NFQUEUE.c
@@ -0,0 +1,70 @@
+/* iptables module for using new netfilter netlink queue
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_NFQUEUE.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_DESCRIPTION("iptables NFQUEUE target");
+MODULE_LICENSE("GPL");
+
+static unsigned int
+target(struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ unsigned int hooknum,
+ const void *targinfo,
+ void *userinfo)
+{
+ const struct ipt_NFQ_info *tinfo = targinfo;
+
+ return NF_QUEUE_NR(tinfo->queuenum);
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ipt_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ if (targinfosize != IPT_ALIGN(sizeof(struct ipt_NFQ_info))) {
+ printk(KERN_WARNING "NFQUEUE: targinfosize %u != %Zu\n",
+ targinfosize,
+ IPT_ALIGN(sizeof(struct ipt_NFQ_info)));
+ return 0;
+ }
+
+ return 1;
+}
+
+static struct ipt_target ipt_NFQ_reg = {
+ .name = "NFQUEUE",
+ .target = target,
+ .checkentry = checkentry,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ipt_register_target(&ipt_NFQ_reg);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_target(&ipt_NFQ_reg);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c
index 915696446020..f115a84a4ac6 100644
--- a/net/ipv4/netfilter/ipt_REJECT.c
+++ b/net/ipv4/netfilter/ipt_REJECT.c
@@ -156,7 +156,6 @@ static void send_reset(struct sk_buff *oldskb, int hook)
/* This packet will not be the same as the other: clear nf fields */
nf_reset(nskb);
- nskb->nfcache = 0;
nskb->nfmark = 0;
#ifdef CONFIG_BRIDGE_NETFILTER
nf_bridge_put(nskb->nf_bridge);
diff --git a/net/ipv4/netfilter/ipt_TCPMSS.c b/net/ipv4/netfilter/ipt_TCPMSS.c
index 7b84a254440e..8db70d6908c3 100644
--- a/net/ipv4/netfilter/ipt_TCPMSS.c
+++ b/net/ipv4/netfilter/ipt_TCPMSS.c
@@ -58,7 +58,7 @@ ipt_tcpmss_target(struct sk_buff **pskb,
unsigned int i;
u_int8_t *opt;
- if (!skb_ip_make_writable(pskb, (*pskb)->len))
+ if (!skb_make_writable(pskb, (*pskb)->len))
return NF_DROP;
if ((*pskb)->ip_summed == CHECKSUM_HW &&
@@ -190,7 +190,6 @@ ipt_tcpmss_target(struct sk_buff **pskb,
newmss);
retmodified:
- (*pskb)->nfcache |= NFC_UNKNOWN | NFC_ALTERED;
return IPT_CONTINUE;
}
diff --git a/net/ipv4/netfilter/ipt_TOS.c b/net/ipv4/netfilter/ipt_TOS.c
index 85c70d240f8b..deadb36d4428 100644
--- a/net/ipv4/netfilter/ipt_TOS.c
+++ b/net/ipv4/netfilter/ipt_TOS.c
@@ -33,7 +33,7 @@ target(struct sk_buff **pskb,
if (((*pskb)->nh.iph->tos & IPTOS_TOS_MASK) != tosinfo->tos) {
u_int16_t diffs[2];
- if (!skb_ip_make_writable(pskb, sizeof(struct iphdr)))
+ if (!skb_make_writable(pskb, sizeof(struct iphdr)))
return NF_DROP;
diffs[0] = htons((*pskb)->nh.iph->tos) ^ 0xFFFF;
@@ -46,7 +46,6 @@ target(struct sk_buff **pskb,
sizeof(diffs),
(*pskb)->nh.iph->check
^0xFFFF));
- (*pskb)->nfcache |= NFC_ALTERED;
}
return IPT_CONTINUE;
}
diff --git a/net/ipv4/netfilter/ipt_TTL.c b/net/ipv4/netfilter/ipt_TTL.c
new file mode 100644
index 000000000000..b9ae6a9382f3
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_TTL.c
@@ -0,0 +1,119 @@
+/* TTL modification target for IP tables
+ * (C) 2000,2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/checksum.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_TTL.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_DESCRIPTION("IP tables TTL modification module");
+MODULE_LICENSE("GPL");
+
+static unsigned int
+ipt_ttl_target(struct sk_buff **pskb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum,
+ const void *targinfo, void *userinfo)
+{
+ struct iphdr *iph;
+ const struct ipt_TTL_info *info = targinfo;
+ u_int16_t diffs[2];
+ int new_ttl;
+
+ if (!skb_make_writable(pskb, (*pskb)->len))
+ return NF_DROP;
+
+ iph = (*pskb)->nh.iph;
+
+ switch (info->mode) {
+ case IPT_TTL_SET:
+ new_ttl = info->ttl;
+ break;
+ case IPT_TTL_INC:
+ new_ttl = iph->ttl + info->ttl;
+ if (new_ttl > 255)
+ new_ttl = 255;
+ break;
+ case IPT_TTL_DEC:
+ new_ttl = iph->ttl - info->ttl;
+ if (new_ttl < 0)
+ new_ttl = 0;
+ break;
+ default:
+ new_ttl = iph->ttl;
+ break;
+ }
+
+ if (new_ttl != iph->ttl) {
+ diffs[0] = htons(((unsigned)iph->ttl) << 8) ^ 0xFFFF;
+ iph->ttl = new_ttl;
+ diffs[1] = htons(((unsigned)iph->ttl) << 8);
+ iph->check = csum_fold(csum_partial((char *)diffs,
+ sizeof(diffs),
+ iph->check^0xFFFF));
+ }
+
+ return IPT_CONTINUE;
+}
+
+static int ipt_ttl_checkentry(const char *tablename,
+ const struct ipt_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ struct ipt_TTL_info *info = targinfo;
+
+ if (targinfosize != IPT_ALIGN(sizeof(struct ipt_TTL_info))) {
+ printk(KERN_WARNING "ipt_TTL: targinfosize %u != %Zu\n",
+ targinfosize,
+ IPT_ALIGN(sizeof(struct ipt_TTL_info)));
+ return 0;
+ }
+
+ if (strcmp(tablename, "mangle")) {
+ printk(KERN_WARNING "ipt_TTL: can only be called from "
+ "\"mangle\" table, not \"%s\"\n", tablename);
+ return 0;
+ }
+
+ if (info->mode > IPT_TTL_MAXMODE) {
+ printk(KERN_WARNING "ipt_TTL: invalid or unknown Mode %u\n",
+ info->mode);
+ return 0;
+ }
+
+ if ((info->mode != IPT_TTL_SET) && (info->ttl == 0))
+ return 0;
+
+ return 1;
+}
+
+static struct ipt_target ipt_TTL = {
+ .name = "TTL",
+ .target = ipt_ttl_target,
+ .checkentry = ipt_ttl_checkentry,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ipt_register_target(&ipt_TTL);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_target(&ipt_TTL);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv4/netfilter/ipt_ULOG.c b/net/ipv4/netfilter/ipt_ULOG.c
index 52a0076302a7..e2c14f3cb2fc 100644
--- a/net/ipv4/netfilter/ipt_ULOG.c
+++ b/net/ipv4/netfilter/ipt_ULOG.c
@@ -62,6 +62,7 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
MODULE_DESCRIPTION("iptables userspace logging module");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_NFLOG);
#define ULOG_NL_EVENT 111 /* Harald's favorite number */
#define ULOG_MAXNLGROUPS 32 /* numer of nlgroups */
@@ -115,10 +116,10 @@ static void ulog_send(unsigned int nlgroupnum)
if (ub->qlen > 1)
ub->lastnlh->nlmsg_type = NLMSG_DONE;
- NETLINK_CB(ub->skb).dst_groups = (1 << nlgroupnum);
- DEBUGP("ipt_ULOG: throwing %d packets to netlink mask %u\n",
- ub->qlen, nlgroupnum);
- netlink_broadcast(nflognl, ub->skb, 0, (1 << nlgroupnum), GFP_ATOMIC);
+ NETLINK_CB(ub->skb).dst_group = nlgroupnum + 1;
+ DEBUGP("ipt_ULOG: throwing %d packets to netlink group %u\n",
+ ub->qlen, nlgroupnum + 1);
+ netlink_broadcast(nflognl, ub->skb, 0, nlgroupnum + 1, GFP_ATOMIC);
ub->qlen = 0;
ub->skb = NULL;
@@ -219,13 +220,13 @@ static void ipt_ulog_packet(unsigned int hooknum,
pm = NLMSG_DATA(nlh);
/* We might not have a timestamp, get one */
- if (skb->stamp.tv_sec == 0)
- do_gettimeofday((struct timeval *)&skb->stamp);
+ if (skb->tstamp.off_sec == 0)
+ __net_timestamp((struct sk_buff *)skb);
/* copy hook, prefix, timestamp, payload, etc. */
pm->data_len = copy_len;
- pm->timestamp_sec = skb->stamp.tv_sec;
- pm->timestamp_usec = skb->stamp.tv_usec;
+ pm->timestamp_sec = skb_tv_base.tv_sec + skb->tstamp.off_sec;
+ pm->timestamp_usec = skb_tv_base.tv_usec + skb->tstamp.off_usec;
pm->mark = skb->nfmark;
pm->hook = hooknum;
if (prefix != NULL)
@@ -303,18 +304,27 @@ static unsigned int ipt_ulog_target(struct sk_buff **pskb,
return IPT_CONTINUE;
}
-static void ipt_logfn(unsigned int hooknum,
+static void ipt_logfn(unsigned int pf,
+ unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
+ const struct nf_loginfo *li,
const char *prefix)
{
- struct ipt_ulog_info loginfo = {
- .nl_group = ULOG_DEFAULT_NLGROUP,
- .copy_range = 0,
- .qthreshold = ULOG_DEFAULT_QTHRESHOLD,
- .prefix = ""
- };
+ struct ipt_ulog_info loginfo;
+
+ if (!li || li->type != NF_LOG_TYPE_ULOG) {
+ loginfo.nl_group = ULOG_DEFAULT_NLGROUP;
+ loginfo.copy_range = 0;
+ loginfo.qthreshold = ULOG_DEFAULT_QTHRESHOLD;
+ loginfo.prefix[0] = '\0';
+ } else {
+ loginfo.nl_group = li->u.ulog.group;
+ loginfo.copy_range = li->u.ulog.copy_len;
+ loginfo.qthreshold = li->u.ulog.qthreshold;
+ strlcpy(loginfo.prefix, prefix, sizeof(loginfo.prefix));
+ }
ipt_ulog_packet(hooknum, skb, in, out, &loginfo, prefix);
}
@@ -354,6 +364,12 @@ static struct ipt_target ipt_ulog_reg = {
.me = THIS_MODULE,
};
+static struct nf_logger ipt_ulog_logger = {
+ .name = "ipt_ULOG",
+ .logfn = &ipt_logfn,
+ .me = THIS_MODULE,
+};
+
static int __init init(void)
{
int i;
@@ -372,7 +388,8 @@ static int __init init(void)
ulog_buffers[i].timer.data = i;
}
- nflognl = netlink_kernel_create(NETLINK_NFLOG, NULL);
+ nflognl = netlink_kernel_create(NETLINK_NFLOG, ULOG_MAXNLGROUPS, NULL,
+ THIS_MODULE);
if (!nflognl)
return -ENOMEM;
@@ -381,7 +398,7 @@ static int __init init(void)
return -EINVAL;
}
if (nflog)
- nf_log_register(PF_INET, &ipt_logfn);
+ nf_log_register(PF_INET, &ipt_ulog_logger);
return 0;
}
@@ -394,7 +411,7 @@ static void __exit fini(void)
DEBUGP("ipt_ULOG: cleanup_module\n");
if (nflog)
- nf_log_unregister(PF_INET, &ipt_logfn);
+ nf_log_unregister_logger(&ipt_ulog_logger);
ipt_unregister_target(&ipt_ulog_reg);
sock_release(nflognl->sk_socket);
diff --git a/net/ipv4/netfilter/ipt_connbytes.c b/net/ipv4/netfilter/ipt_connbytes.c
new file mode 100644
index 000000000000..df4a42c6da22
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_connbytes.c
@@ -0,0 +1,162 @@
+/* Kernel module to match connection tracking byte counter.
+ * GPL (C) 2002 Martin Devera (devik@cdi.cz).
+ *
+ * 2004-07-20 Harald Welte <laforge@netfilter.org>
+ * - reimplemented to use per-connection accounting counters
+ * - add functionality to match number of packets
+ * - add functionality to match average packet size
+ * - add support to match directions seperately
+ *
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_connbytes.h>
+
+#include <asm/div64.h>
+#include <asm/bitops.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_DESCRIPTION("iptables match for matching number of pkts/bytes per connection");
+
+/* 64bit divisor, dividend and result. dynamic precision */
+static u_int64_t div64_64(u_int64_t dividend, u_int64_t divisor)
+{
+ u_int32_t d = divisor;
+
+ if (divisor > 0xffffffffULL) {
+ unsigned int shift = fls(divisor >> 32);
+
+ d = divisor >> shift;
+ dividend >>= shift;
+ }
+
+ do_div(dividend, d);
+ return dividend;
+}
+
+static int
+match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ int *hotdrop)
+{
+ const struct ipt_connbytes_info *sinfo = matchinfo;
+ enum ip_conntrack_info ctinfo;
+ struct ip_conntrack *ct;
+ u_int64_t what = 0; /* initialize to make gcc happy */
+
+ if (!(ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo)))
+ return 0; /* no match */
+
+ switch (sinfo->what) {
+ case IPT_CONNBYTES_PKTS:
+ switch (sinfo->direction) {
+ case IPT_CONNBYTES_DIR_ORIGINAL:
+ what = ct->counters[IP_CT_DIR_ORIGINAL].packets;
+ break;
+ case IPT_CONNBYTES_DIR_REPLY:
+ what = ct->counters[IP_CT_DIR_REPLY].packets;
+ break;
+ case IPT_CONNBYTES_DIR_BOTH:
+ what = ct->counters[IP_CT_DIR_ORIGINAL].packets;
+ what += ct->counters[IP_CT_DIR_REPLY].packets;
+ break;
+ }
+ break;
+ case IPT_CONNBYTES_BYTES:
+ switch (sinfo->direction) {
+ case IPT_CONNBYTES_DIR_ORIGINAL:
+ what = ct->counters[IP_CT_DIR_ORIGINAL].bytes;
+ break;
+ case IPT_CONNBYTES_DIR_REPLY:
+ what = ct->counters[IP_CT_DIR_REPLY].bytes;
+ break;
+ case IPT_CONNBYTES_DIR_BOTH:
+ what = ct->counters[IP_CT_DIR_ORIGINAL].bytes;
+ what += ct->counters[IP_CT_DIR_REPLY].bytes;
+ break;
+ }
+ break;
+ case IPT_CONNBYTES_AVGPKT:
+ switch (sinfo->direction) {
+ case IPT_CONNBYTES_DIR_ORIGINAL:
+ what = div64_64(ct->counters[IP_CT_DIR_ORIGINAL].bytes,
+ ct->counters[IP_CT_DIR_ORIGINAL].packets);
+ break;
+ case IPT_CONNBYTES_DIR_REPLY:
+ what = div64_64(ct->counters[IP_CT_DIR_REPLY].bytes,
+ ct->counters[IP_CT_DIR_REPLY].packets);
+ break;
+ case IPT_CONNBYTES_DIR_BOTH:
+ {
+ u_int64_t bytes;
+ u_int64_t pkts;
+ bytes = ct->counters[IP_CT_DIR_ORIGINAL].bytes +
+ ct->counters[IP_CT_DIR_REPLY].bytes;
+ pkts = ct->counters[IP_CT_DIR_ORIGINAL].packets+
+ ct->counters[IP_CT_DIR_REPLY].packets;
+
+ /* FIXME_THEORETICAL: what to do if sum
+ * overflows ? */
+
+ what = div64_64(bytes, pkts);
+ }
+ break;
+ }
+ break;
+ }
+
+ if (sinfo->count.to)
+ return (what <= sinfo->count.to && what >= sinfo->count.from);
+ else
+ return (what >= sinfo->count.from);
+}
+
+static int check(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ const struct ipt_connbytes_info *sinfo = matchinfo;
+
+ if (matchsize != IPT_ALIGN(sizeof(struct ipt_connbytes_info)))
+ return 0;
+
+ if (sinfo->what != IPT_CONNBYTES_PKTS &&
+ sinfo->what != IPT_CONNBYTES_BYTES &&
+ sinfo->what != IPT_CONNBYTES_AVGPKT)
+ return 0;
+
+ if (sinfo->direction != IPT_CONNBYTES_DIR_ORIGINAL &&
+ sinfo->direction != IPT_CONNBYTES_DIR_REPLY &&
+ sinfo->direction != IPT_CONNBYTES_DIR_BOTH)
+ return 0;
+
+ return 1;
+}
+
+static struct ipt_match state_match = {
+ .name = "connbytes",
+ .match = &match,
+ .checkentry = &check,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ipt_register_match(&state_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&state_match);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv4/netfilter/ipt_connmark.c b/net/ipv4/netfilter/ipt_connmark.c
index 2706f96cea55..bf8de47ce004 100644
--- a/net/ipv4/netfilter/ipt_connmark.c
+++ b/net/ipv4/netfilter/ipt_connmark.c
@@ -54,9 +54,16 @@ checkentry(const char *tablename,
unsigned int matchsize,
unsigned int hook_mask)
{
+ struct ipt_connmark_info *cm =
+ (struct ipt_connmark_info *)matchinfo;
if (matchsize != IPT_ALIGN(sizeof(struct ipt_connmark_info)))
return 0;
+ if (cm->mark > 0xffffffff || cm->mask > 0xffffffff) {
+ printk(KERN_WARNING "connmark: only support 32bit mark\n");
+ return 0;
+ }
+
return 1;
}
diff --git a/net/ipv4/netfilter/ipt_dccp.c b/net/ipv4/netfilter/ipt_dccp.c
new file mode 100644
index 000000000000..ad3278bba6c1
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_dccp.c
@@ -0,0 +1,176 @@
+/*
+ * iptables module for DCCP protocol header matching
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <net/ip.h>
+#include <linux/dccp.h>
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_dccp.h>
+
+#define DCCHECK(cond, option, flag, invflag) (!((flag) & (option)) \
+ || (!!((invflag) & (option)) ^ (cond)))
+
+static unsigned char *dccp_optbuf;
+static DEFINE_SPINLOCK(dccp_buflock);
+
+static inline int
+dccp_find_option(u_int8_t option,
+ const struct sk_buff *skb,
+ const struct dccp_hdr *dh,
+ int *hotdrop)
+{
+ /* tcp.doff is only 4 bits, ie. max 15 * 4 bytes */
+ unsigned char *op;
+ unsigned int optoff = __dccp_hdr_len(dh);
+ unsigned int optlen = dh->dccph_doff*4 - __dccp_hdr_len(dh);
+ unsigned int i;
+
+ if (dh->dccph_doff * 4 < __dccp_hdr_len(dh)) {
+ *hotdrop = 1;
+ return 0;
+ }
+
+ if (!optlen)
+ return 0;
+
+ spin_lock_bh(&dccp_buflock);
+ op = skb_header_pointer(skb,
+ skb->nh.iph->ihl*4 + optoff,
+ optlen, dccp_optbuf);
+ if (op == NULL) {
+ /* If we don't have the whole header, drop packet. */
+ spin_unlock_bh(&dccp_buflock);
+ *hotdrop = 1;
+ return 0;
+ }
+
+ for (i = 0; i < optlen; ) {
+ if (op[i] == option) {
+ spin_unlock_bh(&dccp_buflock);
+ return 1;
+ }
+
+ if (op[i] < 2)
+ i++;
+ else
+ i += op[i+1]?:1;
+ }
+
+ spin_unlock_bh(&dccp_buflock);
+ return 0;
+}
+
+
+static inline int
+match_types(const struct dccp_hdr *dh, u_int16_t typemask)
+{
+ return (typemask & (1 << dh->dccph_type));
+}
+
+static inline int
+match_option(u_int8_t option, const struct sk_buff *skb,
+ const struct dccp_hdr *dh, int *hotdrop)
+{
+ return dccp_find_option(option, skb, dh, hotdrop);
+}
+
+static int
+match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ int *hotdrop)
+{
+ const struct ipt_dccp_info *info =
+ (const struct ipt_dccp_info *)matchinfo;
+ struct dccp_hdr _dh, *dh;
+
+ if (offset)
+ return 0;
+
+ dh = skb_header_pointer(skb, skb->nh.iph->ihl*4, sizeof(_dh), &_dh);
+ if (dh == NULL) {
+ *hotdrop = 1;
+ return 0;
+ }
+
+ return DCCHECK(((ntohs(dh->dccph_sport) >= info->spts[0])
+ && (ntohs(dh->dccph_sport) <= info->spts[1])),
+ IPT_DCCP_SRC_PORTS, info->flags, info->invflags)
+ && DCCHECK(((ntohs(dh->dccph_dport) >= info->dpts[0])
+ && (ntohs(dh->dccph_dport) <= info->dpts[1])),
+ IPT_DCCP_DEST_PORTS, info->flags, info->invflags)
+ && DCCHECK(match_types(dh, info->typemask),
+ IPT_DCCP_TYPE, info->flags, info->invflags)
+ && DCCHECK(match_option(info->option, skb, dh, hotdrop),
+ IPT_DCCP_OPTION, info->flags, info->invflags);
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ const struct ipt_dccp_info *info;
+
+ info = (const struct ipt_dccp_info *)matchinfo;
+
+ return ip->proto == IPPROTO_DCCP
+ && !(ip->invflags & IPT_INV_PROTO)
+ && matchsize == IPT_ALIGN(sizeof(struct ipt_dccp_info))
+ && !(info->flags & ~IPT_DCCP_VALID_FLAGS)
+ && !(info->invflags & ~IPT_DCCP_VALID_FLAGS)
+ && !(info->invflags & ~info->flags);
+}
+
+static struct ipt_match dccp_match =
+{
+ .name = "dccp",
+ .match = &match,
+ .checkentry = &checkentry,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ int ret;
+
+ /* doff is 8 bits, so the maximum option size is (4*256). Don't put
+ * this in BSS since DaveM is worried about locked TLB's for kernel
+ * BSS. */
+ dccp_optbuf = kmalloc(256 * 4, GFP_KERNEL);
+ if (!dccp_optbuf)
+ return -ENOMEM;
+ ret = ipt_register_match(&dccp_match);
+ if (ret)
+ kfree(dccp_optbuf);
+
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&dccp_match);
+ kfree(dccp_optbuf);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_DESCRIPTION("Match for DCCP protocol packets");
+
diff --git a/net/ipv4/netfilter/ipt_hashlimit.c b/net/ipv4/netfilter/ipt_hashlimit.c
index 564b49bfebcf..2dd1cccbdab9 100644
--- a/net/ipv4/netfilter/ipt_hashlimit.c
+++ b/net/ipv4/netfilter/ipt_hashlimit.c
@@ -94,7 +94,7 @@ struct ipt_hashlimit_htable {
static DEFINE_SPINLOCK(hashlimit_lock); /* protects htables list */
static DECLARE_MUTEX(hlimit_mutex); /* additional checkentry protection */
static HLIST_HEAD(hashlimit_htables);
-static kmem_cache_t *hashlimit_cachep;
+static kmem_cache_t *hashlimit_cachep __read_mostly;
static inline int dst_cmp(const struct dsthash_ent *ent, struct dsthash_dst *b)
{
diff --git a/net/ipv4/netfilter/ipt_mark.c b/net/ipv4/netfilter/ipt_mark.c
index 8955728127b9..00bef6cdd3f8 100644
--- a/net/ipv4/netfilter/ipt_mark.c
+++ b/net/ipv4/netfilter/ipt_mark.c
@@ -37,9 +37,16 @@ checkentry(const char *tablename,
unsigned int matchsize,
unsigned int hook_mask)
{
+ struct ipt_mark_info *minfo = (struct ipt_mark_info *) matchinfo;
+
if (matchsize != IPT_ALIGN(sizeof(struct ipt_mark_info)))
return 0;
+ if (minfo->mark > 0xffffffff || minfo->mask > 0xffffffff) {
+ printk(KERN_WARNING "mark: only supports 32bit mark\n");
+ return 0;
+ }
+
return 1;
}
diff --git a/net/ipv4/netfilter/ipt_owner.c b/net/ipv4/netfilter/ipt_owner.c
index 3b9065e06381..c1889f88262b 100644
--- a/net/ipv4/netfilter/ipt_owner.c
+++ b/net/ipv4/netfilter/ipt_owner.c
@@ -21,106 +21,6 @@ MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_DESCRIPTION("iptables owner match");
static int
-match_comm(const struct sk_buff *skb, const char *comm)
-{
- struct task_struct *g, *p;
- struct files_struct *files;
- int i;
-
- read_lock(&tasklist_lock);
- do_each_thread(g, p) {
- if(strncmp(p->comm, comm, sizeof(p->comm)))
- continue;
-
- task_lock(p);
- files = p->files;
- if(files) {
- spin_lock(&files->file_lock);
- for (i=0; i < files->max_fds; i++) {
- if (fcheck_files(files, i) ==
- skb->sk->sk_socket->file) {
- spin_unlock(&files->file_lock);
- task_unlock(p);
- read_unlock(&tasklist_lock);
- return 1;
- }
- }
- spin_unlock(&files->file_lock);
- }
- task_unlock(p);
- } while_each_thread(g, p);
- read_unlock(&tasklist_lock);
- return 0;
-}
-
-static int
-match_pid(const struct sk_buff *skb, pid_t pid)
-{
- struct task_struct *p;
- struct files_struct *files;
- int i;
-
- read_lock(&tasklist_lock);
- p = find_task_by_pid(pid);
- if (!p)
- goto out;
- task_lock(p);
- files = p->files;
- if(files) {
- spin_lock(&files->file_lock);
- for (i=0; i < files->max_fds; i++) {
- if (fcheck_files(files, i) ==
- skb->sk->sk_socket->file) {
- spin_unlock(&files->file_lock);
- task_unlock(p);
- read_unlock(&tasklist_lock);
- return 1;
- }
- }
- spin_unlock(&files->file_lock);
- }
- task_unlock(p);
-out:
- read_unlock(&tasklist_lock);
- return 0;
-}
-
-static int
-match_sid(const struct sk_buff *skb, pid_t sid)
-{
- struct task_struct *g, *p;
- struct file *file = skb->sk->sk_socket->file;
- int i, found=0;
-
- read_lock(&tasklist_lock);
- do_each_thread(g, p) {
- struct files_struct *files;
- if (p->signal->session != sid)
- continue;
-
- task_lock(p);
- files = p->files;
- if (files) {
- spin_lock(&files->file_lock);
- for (i=0; i < files->max_fds; i++) {
- if (fcheck_files(files, i) == file) {
- found = 1;
- break;
- }
- }
- spin_unlock(&files->file_lock);
- }
- task_unlock(p);
- if (found)
- goto out;
- } while_each_thread(g, p);
-out:
- read_unlock(&tasklist_lock);
-
- return found;
-}
-
-static int
match(const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
@@ -145,24 +45,6 @@ match(const struct sk_buff *skb,
return 0;
}
- if(info->match & IPT_OWNER_PID) {
- if (!match_pid(skb, info->pid) ^
- !!(info->invert & IPT_OWNER_PID))
- return 0;
- }
-
- if(info->match & IPT_OWNER_SID) {
- if (!match_sid(skb, info->sid) ^
- !!(info->invert & IPT_OWNER_SID))
- return 0;
- }
-
- if(info->match & IPT_OWNER_COMM) {
- if (!match_comm(skb, info->comm) ^
- !!(info->invert & IPT_OWNER_COMM))
- return 0;
- }
-
return 1;
}
@@ -173,6 +55,8 @@ checkentry(const char *tablename,
unsigned int matchsize,
unsigned int hook_mask)
{
+ const struct ipt_owner_info *info = matchinfo;
+
if (hook_mask
& ~((1 << NF_IP_LOCAL_OUT) | (1 << NF_IP_POST_ROUTING))) {
printk("ipt_owner: only valid for LOCAL_OUT or POST_ROUTING.\n");
@@ -184,15 +68,13 @@ checkentry(const char *tablename,
IPT_ALIGN(sizeof(struct ipt_owner_info)));
return 0;
}
-#ifdef CONFIG_SMP
- /* files->file_lock can not be used in a BH */
- if (((struct ipt_owner_info *)matchinfo)->match
- & (IPT_OWNER_PID|IPT_OWNER_SID|IPT_OWNER_COMM)) {
- printk("ipt_owner: pid, sid and command matching is broken "
- "on SMP.\n");
+
+ if (info->match & (IPT_OWNER_PID|IPT_OWNER_SID|IPT_OWNER_COMM)) {
+ printk("ipt_owner: pid, sid and command matching "
+ "not supported anymore\n");
return 0;
}
-#endif
+
return 1;
}
diff --git a/net/ipv4/netfilter/ipt_string.c b/net/ipv4/netfilter/ipt_string.c
new file mode 100644
index 000000000000..b5def204d798
--- /dev/null
+++ b/net/ipv4/netfilter/ipt_string.c
@@ -0,0 +1,91 @@
+/* String matching match for iptables
+ *
+ * (C) 2005 Pablo Neira Ayuso <pablo@eurodev.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_string.h>
+#include <linux/textsearch.h>
+
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@eurodev.net>");
+MODULE_DESCRIPTION("IP tables string match module");
+MODULE_LICENSE("GPL");
+
+static int match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ int *hotdrop)
+{
+ struct ts_state state;
+ struct ipt_string_info *conf = (struct ipt_string_info *) matchinfo;
+
+ memset(&state, 0, sizeof(struct ts_state));
+
+ return (skb_find_text((struct sk_buff *)skb, conf->from_offset,
+ conf->to_offset, conf->config, &state)
+ != UINT_MAX) && !conf->invert;
+}
+
+#define STRING_TEXT_PRIV(m) ((struct ipt_string_info *) m)
+
+static int checkentry(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ struct ipt_string_info *conf = matchinfo;
+ struct ts_config *ts_conf;
+
+ if (matchsize != IPT_ALIGN(sizeof(struct ipt_string_info)))
+ return 0;
+
+ /* Damn, can't handle this case properly with iptables... */
+ if (conf->from_offset > conf->to_offset)
+ return 0;
+
+ ts_conf = textsearch_prepare(conf->algo, conf->pattern, conf->patlen,
+ GFP_KERNEL, TS_AUTOLOAD);
+ if (IS_ERR(ts_conf))
+ return 0;
+
+ conf->config = ts_conf;
+
+ return 1;
+}
+
+static void destroy(void *matchinfo, unsigned int matchsize)
+{
+ textsearch_destroy(STRING_TEXT_PRIV(matchinfo)->config);
+}
+
+static struct ipt_match string_match = {
+ .name = "string",
+ .match = match,
+ .checkentry = checkentry,
+ .destroy = destroy,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ipt_register_match(&string_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&string_match);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 912bbcc7f415..f7943ba1f43c 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -59,13 +59,10 @@ static int fold_prot_inuse(struct proto *proto)
*/
static int sockstat_seq_show(struct seq_file *seq, void *v)
{
- /* From net/socket.c */
- extern void socket_seq_show(struct seq_file *seq);
-
socket_seq_show(seq);
seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
- tcp_tw_count, atomic_read(&tcp_sockets_allocated),
+ tcp_death_row.tw_count, atomic_read(&tcp_sockets_allocated),
atomic_read(&tcp_memory_allocated));
seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
diff --git a/net/ipv4/protocol.c b/net/ipv4/protocol.c
index 0db405a869f2..291831e792af 100644
--- a/net/ipv4/protocol.c
+++ b/net/ipv4/protocol.c
@@ -40,7 +40,6 @@
#include <linux/timer.h>
#include <net/ip.h>
#include <net/protocol.h>
-#include <net/tcp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/icmp.h>
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index d1835b1bc8c4..304bb0a1d4f0 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -59,7 +59,6 @@
#include <linux/netdevice.h>
#include <linux/in_route.h>
#include <linux/route.h>
-#include <linux/tcp.h>
#include <linux/skbuff.h>
#include <net/dst.h>
#include <net/sock.h>
@@ -71,6 +70,7 @@
#include <net/udp.h>
#include <net/raw.h>
#include <net/snmp.h>
+#include <net/tcp_states.h>
#include <net/inet_common.h>
#include <net/checksum.h>
#include <net/xfrm.h>
@@ -150,10 +150,11 @@ static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb)
* RFC 1122: SHOULD pass TOS value up to the transport layer.
* -> It does. And not only TOS, but all IP header.
*/
-void raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
+int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
{
struct sock *sk;
struct hlist_head *head;
+ int delivered = 0;
read_lock(&raw_v4_lock);
head = &raw_v4_htable[hash];
@@ -164,6 +165,7 @@ void raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
skb->dev->ifindex);
while (sk) {
+ delivered = 1;
if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
@@ -177,6 +179,7 @@ void raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash)
}
out:
read_unlock(&raw_v4_lock);
+ return delivered;
}
void raw_err (struct sock *sk, struct sk_buff *skb, u32 info)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index d675ff80b04d..8c0b14e3beec 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -240,7 +240,9 @@ static unsigned rt_hash_mask;
static int rt_hash_log;
static unsigned int rt_hash_rnd;
-struct rt_cache_stat *rt_cache_stat;
+static struct rt_cache_stat *rt_cache_stat;
+#define RT_CACHE_STAT_INC(field) \
+ (per_cpu_ptr(rt_cache_stat, raw_smp_processor_id())->field++)
static int rt_intern_hash(unsigned hash, struct rtable *rth,
struct rtable **res);
@@ -2600,6 +2602,8 @@ int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
return ip_route_output_slow(rp, flp);
}
+EXPORT_SYMBOL_GPL(__ip_route_output_key);
+
int ip_route_output_flow(struct rtable **rp, struct flowi *flp, struct sock *sk, int flags)
{
int err;
@@ -2618,6 +2622,8 @@ int ip_route_output_flow(struct rtable **rp, struct flowi *flp, struct sock *sk,
return 0;
}
+EXPORT_SYMBOL_GPL(ip_route_output_flow);
+
int ip_route_output_key(struct rtable **rp, struct flowi *flp)
{
return ip_route_output_flow(rp, flp, NULL, 0);
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 72d014442185..a34e60ea48a1 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -169,8 +169,6 @@ static inline int cookie_check(struct sk_buff *skb, __u32 cookie)
return mssind < NUM_MSS ? msstab[mssind] + 1 : 0;
}
-extern struct request_sock_ops tcp_request_sock_ops;
-
static inline struct sock *get_cookie_sock(struct sock *sk, struct sk_buff *skb,
struct request_sock *req,
struct dst_entry *dst)
@@ -180,7 +178,7 @@ static inline struct sock *get_cookie_sock(struct sock *sk, struct sk_buff *skb,
child = tp->af_specific->syn_recv_sock(sk, skb, req, dst);
if (child)
- tcp_acceptq_queue(sk, req, child);
+ inet_csk_reqsk_queue_add(sk, req, child);
else
reqsk_free(req);
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index e32894532416..652685623519 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -11,7 +11,9 @@
#include <linux/module.h>
#include <linux/sysctl.h>
#include <linux/config.h>
+#include <linux/igmp.h>
#include <net/snmp.h>
+#include <net/icmp.h>
#include <net/ip.h>
#include <net/route.h>
#include <net/tcp.h>
@@ -19,36 +21,6 @@
/* From af_inet.c */
extern int sysctl_ip_nonlocal_bind;
-/* From icmp.c */
-extern int sysctl_icmp_echo_ignore_all;
-extern int sysctl_icmp_echo_ignore_broadcasts;
-extern int sysctl_icmp_ignore_bogus_error_responses;
-extern int sysctl_icmp_errors_use_inbound_ifaddr;
-
-/* From ip_fragment.c */
-extern int sysctl_ipfrag_low_thresh;
-extern int sysctl_ipfrag_high_thresh;
-extern int sysctl_ipfrag_time;
-extern int sysctl_ipfrag_secret_interval;
-
-/* From ip_output.c */
-extern int sysctl_ip_dynaddr;
-
-/* From icmp.c */
-extern int sysctl_icmp_ratelimit;
-extern int sysctl_icmp_ratemask;
-
-/* From igmp.c */
-extern int sysctl_igmp_max_memberships;
-extern int sysctl_igmp_max_msf;
-
-/* From inetpeer.c */
-extern int inet_peer_threshold;
-extern int inet_peer_minttl;
-extern int inet_peer_maxttl;
-extern int inet_peer_gc_mintime;
-extern int inet_peer_gc_maxtime;
-
#ifdef CONFIG_SYSCTL
static int tcp_retr1_max = 255;
static int ip_local_port_range_min[] = { 1, 1 };
@@ -57,8 +29,6 @@ static int ip_local_port_range_max[] = { 65535, 65535 };
struct ipv4_config ipv4_config;
-extern ctl_table ipv4_route_table[];
-
#ifdef CONFIG_SYSCTL
static
@@ -136,10 +106,11 @@ static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file *
return ret;
}
-int sysctl_tcp_congestion_control(ctl_table *table, int __user *name, int nlen,
- void __user *oldval, size_t __user *oldlenp,
- void __user *newval, size_t newlen,
- void **context)
+static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
+ int nlen, void __user *oldval,
+ size_t __user *oldlenp,
+ void __user *newval, size_t newlen,
+ void **context)
{
char val[TCP_CA_NAME_MAX];
ctl_table tbl = {
@@ -259,7 +230,7 @@ ctl_table ipv4_table[] = {
{
.ctl_name = NET_TCP_MAX_TW_BUCKETS,
.procname = "tcp_max_tw_buckets",
- .data = &sysctl_tcp_max_tw_buckets,
+ .data = &tcp_death_row.sysctl_max_tw_buckets,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -363,7 +334,7 @@ ctl_table ipv4_table[] = {
{
.ctl_name = NET_TCP_TW_RECYCLE,
.procname = "tcp_tw_recycle",
- .data = &sysctl_tcp_tw_recycle,
+ .data = &tcp_death_row.sysctl_tw_recycle,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 69b1fcf70077..02fdda68718d 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -269,13 +269,12 @@
int sysctl_tcp_fin_timeout = TCP_FIN_TIMEOUT;
-DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics);
-
-kmem_cache_t *tcp_bucket_cachep;
-kmem_cache_t *tcp_timewait_cachep;
+DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics) __read_mostly;
atomic_t tcp_orphan_count = ATOMIC_INIT(0);
+EXPORT_SYMBOL_GPL(tcp_orphan_count);
+
int sysctl_tcp_mem[3];
int sysctl_tcp_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
int sysctl_tcp_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
@@ -311,15 +310,6 @@ void tcp_enter_memory_pressure(void)
EXPORT_SYMBOL(tcp_enter_memory_pressure);
/*
- * LISTEN is a special case for poll..
- */
-static __inline__ unsigned int tcp_listen_poll(struct sock *sk,
- poll_table *wait)
-{
- return !reqsk_queue_empty(&tcp_sk(sk)->accept_queue) ? (POLLIN | POLLRDNORM) : 0;
-}
-
-/*
* Wait for a TCP event.
*
* Note that we don't need to lock the socket, as the upper poll layers
@@ -334,7 +324,7 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait)
poll_wait(file, sk->sk_sleep, wait);
if (sk->sk_state == TCP_LISTEN)
- return tcp_listen_poll(sk, wait);
+ return inet_csk_listen_poll(sk);
/* Socket is not locked. We are protected from async events
by poll logic and correct handling of state changes
@@ -457,109 +447,6 @@ int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg)
return put_user(answ, (int __user *)arg);
}
-
-int tcp_listen_start(struct sock *sk)
-{
- struct inet_sock *inet = inet_sk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
- int rc = reqsk_queue_alloc(&tp->accept_queue, TCP_SYNQ_HSIZE);
-
- if (rc != 0)
- return rc;
-
- sk->sk_max_ack_backlog = 0;
- sk->sk_ack_backlog = 0;
- tcp_delack_init(tp);
-
- /* There is race window here: we announce ourselves listening,
- * but this transition is still not validated by get_port().
- * It is OK, because this socket enters to hash table only
- * after validation is complete.
- */
- sk->sk_state = TCP_LISTEN;
- if (!sk->sk_prot->get_port(sk, inet->num)) {
- inet->sport = htons(inet->num);
-
- sk_dst_reset(sk);
- sk->sk_prot->hash(sk);
-
- return 0;
- }
-
- sk->sk_state = TCP_CLOSE;
- reqsk_queue_destroy(&tp->accept_queue);
- return -EADDRINUSE;
-}
-
-/*
- * This routine closes sockets which have been at least partially
- * opened, but not yet accepted.
- */
-
-static void tcp_listen_stop (struct sock *sk)
-{
- struct tcp_sock *tp = tcp_sk(sk);
- struct listen_sock *lopt;
- struct request_sock *acc_req;
- struct request_sock *req;
- int i;
-
- tcp_delete_keepalive_timer(sk);
-
- /* make all the listen_opt local to us */
- lopt = reqsk_queue_yank_listen_sk(&tp->accept_queue);
- acc_req = reqsk_queue_yank_acceptq(&tp->accept_queue);
-
- if (lopt->qlen) {
- for (i = 0; i < TCP_SYNQ_HSIZE; i++) {
- while ((req = lopt->syn_table[i]) != NULL) {
- lopt->syn_table[i] = req->dl_next;
- lopt->qlen--;
- reqsk_free(req);
-
- /* Following specs, it would be better either to send FIN
- * (and enter FIN-WAIT-1, it is normal close)
- * or to send active reset (abort).
- * Certainly, it is pretty dangerous while synflood, but it is
- * bad justification for our negligence 8)
- * To be honest, we are not able to make either
- * of the variants now. --ANK
- */
- }
- }
- }
- BUG_TRAP(!lopt->qlen);
-
- kfree(lopt);
-
- while ((req = acc_req) != NULL) {
- struct sock *child = req->sk;
-
- acc_req = req->dl_next;
-
- local_bh_disable();
- bh_lock_sock(child);
- BUG_TRAP(!sock_owned_by_user(child));
- sock_hold(child);
-
- tcp_disconnect(child, O_NONBLOCK);
-
- sock_orphan(child);
-
- atomic_inc(&tcp_orphan_count);
-
- tcp_destroy_sock(child);
-
- bh_unlock_sock(child);
- local_bh_enable();
- sock_put(child);
-
- sk_acceptq_removed(sk);
- __reqsk_free(req);
- }
- BUG_TRAP(!sk->sk_ack_backlog);
-}
-
static inline void tcp_mark_push(struct tcp_sock *tp, struct sk_buff *skb)
{
TCP_SKB_CB(skb)->flags |= TCPCB_FLAG_PSH;
@@ -975,7 +862,7 @@ do_fault:
if (!skb->len) {
if (sk->sk_send_head == skb)
sk->sk_send_head = NULL;
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &sk->sk_write_queue);
sk_stream_free_skb(sk, skb);
}
@@ -1057,20 +944,21 @@ static void cleanup_rbuf(struct sock *sk, int copied)
BUG_TRAP(!skb || before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq));
#endif
- if (tcp_ack_scheduled(tp)) {
+ if (inet_csk_ack_scheduled(sk)) {
+ const struct inet_connection_sock *icsk = inet_csk(sk);
/* Delayed ACKs frequently hit locked sockets during bulk
* receive. */
- if (tp->ack.blocked ||
+ if (icsk->icsk_ack.blocked ||
/* Once-per-two-segments ACK was not sent by tcp_input.c */
- tp->rcv_nxt - tp->rcv_wup > tp->ack.rcv_mss ||
+ tp->rcv_nxt - tp->rcv_wup > icsk->icsk_ack.rcv_mss ||
/*
* If this read emptied read buffer, we send ACK, if
* connection is not bidirectional, user drained
* receive buffer and there was a small segment
* in queue.
*/
- (copied > 0 && (tp->ack.pending & TCP_ACK_PUSHED) &&
- !tp->ack.pingpong && !atomic_read(&sk->sk_rmem_alloc)))
+ (copied > 0 && (icsk->icsk_ack.pending & ICSK_ACK_PUSHED) &&
+ !icsk->icsk_ack.pingpong && !atomic_read(&sk->sk_rmem_alloc)))
time_to_ack = 1;
}
@@ -1572,40 +1460,6 @@ void tcp_shutdown(struct sock *sk, int how)
}
}
-/*
- * At this point, there should be no process reference to this
- * socket, and thus no user references at all. Therefore we
- * can assume the socket waitqueue is inactive and nobody will
- * try to jump onto it.
- */
-void tcp_destroy_sock(struct sock *sk)
-{
- BUG_TRAP(sk->sk_state == TCP_CLOSE);
- BUG_TRAP(sock_flag(sk, SOCK_DEAD));
-
- /* It cannot be in hash table! */
- BUG_TRAP(sk_unhashed(sk));
-
- /* If it has not 0 inet_sk(sk)->num, it must be bound */
- BUG_TRAP(!inet_sk(sk)->num || tcp_sk(sk)->bind_hash);
-
- sk->sk_prot->destroy(sk);
-
- sk_stream_kill_queues(sk);
-
- xfrm_sk_free_policy(sk);
-
-#ifdef INET_REFCNT_DEBUG
- if (atomic_read(&sk->sk_refcnt) != 1) {
- printk(KERN_DEBUG "Destruction TCP %p delayed, c=%d\n",
- sk, atomic_read(&sk->sk_refcnt));
- }
-#endif
-
- atomic_dec(&tcp_orphan_count);
- sock_put(sk);
-}
-
void tcp_close(struct sock *sk, long timeout)
{
struct sk_buff *skb;
@@ -1618,7 +1472,7 @@ void tcp_close(struct sock *sk, long timeout)
tcp_set_state(sk, TCP_CLOSE);
/* Special case. */
- tcp_listen_stop(sk);
+ inet_csk_listen_stop(sk);
goto adjudge_to_death;
}
@@ -1721,12 +1575,12 @@ adjudge_to_death:
tcp_send_active_reset(sk, GFP_ATOMIC);
NET_INC_STATS_BH(LINUX_MIB_TCPABORTONLINGER);
} else {
- int tmo = tcp_fin_time(tp);
+ const int tmo = tcp_fin_time(sk);
if (tmo > TCP_TIMEWAIT_LEN) {
- tcp_reset_keepalive_timer(sk, tcp_fin_time(tp));
+ inet_csk_reset_keepalive_timer(sk, tcp_fin_time(sk));
} else {
- atomic_inc(&tcp_orphan_count);
+ atomic_inc(sk->sk_prot->orphan_count);
tcp_time_wait(sk, TCP_FIN_WAIT2, tmo);
goto out;
}
@@ -1734,7 +1588,7 @@ adjudge_to_death:
}
if (sk->sk_state != TCP_CLOSE) {
sk_stream_mem_reclaim(sk);
- if (atomic_read(&tcp_orphan_count) > sysctl_tcp_max_orphans ||
+ if (atomic_read(sk->sk_prot->orphan_count) > sysctl_tcp_max_orphans ||
(sk->sk_wmem_queued > SOCK_MIN_SNDBUF &&
atomic_read(&tcp_memory_allocated) > sysctl_tcp_mem[2])) {
if (net_ratelimit())
@@ -1745,10 +1599,10 @@ adjudge_to_death:
NET_INC_STATS_BH(LINUX_MIB_TCPABORTONMEMORY);
}
}
- atomic_inc(&tcp_orphan_count);
+ atomic_inc(sk->sk_prot->orphan_count);
if (sk->sk_state == TCP_CLOSE)
- tcp_destroy_sock(sk);
+ inet_csk_destroy_sock(sk);
/* Otherwise, socket is reprieved until protocol close. */
out:
@@ -1769,6 +1623,7 @@ static inline int tcp_need_reset(int state)
int tcp_disconnect(struct sock *sk, int flags)
{
struct inet_sock *inet = inet_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
int err = 0;
int old_state = sk->sk_state;
@@ -1778,7 +1633,7 @@ int tcp_disconnect(struct sock *sk, int flags)
/* ABORT function of RFC793 */
if (old_state == TCP_LISTEN) {
- tcp_listen_stop(sk);
+ inet_csk_listen_stop(sk);
} else if (tcp_need_reset(old_state) ||
(tp->snd_nxt != tp->write_seq &&
(1 << old_state) & (TCPF_CLOSING | TCPF_LAST_ACK))) {
@@ -1805,125 +1660,34 @@ int tcp_disconnect(struct sock *sk, int flags)
tp->srtt = 0;
if ((tp->write_seq += tp->max_window + 2) == 0)
tp->write_seq = 1;
- tp->backoff = 0;
+ icsk->icsk_backoff = 0;
tp->snd_cwnd = 2;
- tp->probes_out = 0;
+ icsk->icsk_probes_out = 0;
tp->packets_out = 0;
tp->snd_ssthresh = 0x7fffffff;
tp->snd_cwnd_cnt = 0;
- tcp_set_ca_state(tp, TCP_CA_Open);
+ tcp_set_ca_state(sk, TCP_CA_Open);
tcp_clear_retrans(tp);
- tcp_delack_init(tp);
+ inet_csk_delack_init(sk);
sk->sk_send_head = NULL;
tp->rx_opt.saw_tstamp = 0;
tcp_sack_reset(&tp->rx_opt);
__sk_dst_reset(sk);
- BUG_TRAP(!inet->num || tp->bind_hash);
+ BUG_TRAP(!inet->num || icsk->icsk_bind_hash);
sk->sk_error_report(sk);
return err;
}
/*
- * Wait for an incoming connection, avoid race
- * conditions. This must be called with the socket locked.
- */
-static int wait_for_connect(struct sock *sk, long timeo)
-{
- struct tcp_sock *tp = tcp_sk(sk);
- DEFINE_WAIT(wait);
- int err;
-
- /*
- * True wake-one mechanism for incoming connections: only
- * one process gets woken up, not the 'whole herd'.
- * Since we do not 'race & poll' for established sockets
- * anymore, the common case will execute the loop only once.
- *
- * Subtle issue: "add_wait_queue_exclusive()" will be added
- * after any current non-exclusive waiters, and we know that
- * it will always _stay_ after any new non-exclusive waiters
- * because all non-exclusive waiters are added at the
- * beginning of the wait-queue. As such, it's ok to "drop"
- * our exclusiveness temporarily when we get woken up without
- * having to remove and re-insert us on the wait queue.
- */
- for (;;) {
- prepare_to_wait_exclusive(sk->sk_sleep, &wait,
- TASK_INTERRUPTIBLE);
- release_sock(sk);
- if (reqsk_queue_empty(&tp->accept_queue))
- timeo = schedule_timeout(timeo);
- lock_sock(sk);
- err = 0;
- if (!reqsk_queue_empty(&tp->accept_queue))
- break;
- err = -EINVAL;
- if (sk->sk_state != TCP_LISTEN)
- break;
- err = sock_intr_errno(timeo);
- if (signal_pending(current))
- break;
- err = -EAGAIN;
- if (!timeo)
- break;
- }
- finish_wait(sk->sk_sleep, &wait);
- return err;
-}
-
-/*
- * This will accept the next outstanding connection.
- */
-
-struct sock *tcp_accept(struct sock *sk, int flags, int *err)
-{
- struct tcp_sock *tp = tcp_sk(sk);
- struct sock *newsk;
- int error;
-
- lock_sock(sk);
-
- /* We need to make sure that this socket is listening,
- * and that it has something pending.
- */
- error = -EINVAL;
- if (sk->sk_state != TCP_LISTEN)
- goto out_err;
-
- /* Find already established connection */
- if (reqsk_queue_empty(&tp->accept_queue)) {
- long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
-
- /* If this is a non blocking socket don't sleep */
- error = -EAGAIN;
- if (!timeo)
- goto out_err;
-
- error = wait_for_connect(sk, timeo);
- if (error)
- goto out_err;
- }
-
- newsk = reqsk_queue_get_child(&tp->accept_queue, sk);
- BUG_TRAP(newsk->sk_state != TCP_SYN_RECV);
-out:
- release_sock(sk);
- return newsk;
-out_err:
- newsk = NULL;
- *err = error;
- goto out;
-}
-
-/*
* Socket option code for TCP.
*/
int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
int optlen)
{
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
int val;
int err = 0;
@@ -1945,7 +1709,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
name[val] = 0;
lock_sock(sk);
- err = tcp_set_congestion_control(tp, name);
+ err = tcp_set_congestion_control(sk, name);
release_sock(sk);
return err;
}
@@ -2022,7 +1786,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
elapsed = tp->keepalive_time - elapsed;
else
elapsed = 0;
- tcp_reset_keepalive_timer(sk, elapsed);
+ inet_csk_reset_keepalive_timer(sk, elapsed);
}
}
break;
@@ -2042,7 +1806,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
if (val < 1 || val > MAX_TCP_SYNCNT)
err = -EINVAL;
else
- tp->syn_retries = val;
+ icsk->icsk_syn_retries = val;
break;
case TCP_LINGER2:
@@ -2055,15 +1819,15 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
break;
case TCP_DEFER_ACCEPT:
- tp->defer_accept = 0;
+ icsk->icsk_accept_queue.rskq_defer_accept = 0;
if (val > 0) {
/* Translate value in seconds to number of
* retransmits */
- while (tp->defer_accept < 32 &&
+ while (icsk->icsk_accept_queue.rskq_defer_accept < 32 &&
val > ((TCP_TIMEOUT_INIT / HZ) <<
- tp->defer_accept))
- tp->defer_accept++;
- tp->defer_accept++;
+ icsk->icsk_accept_queue.rskq_defer_accept))
+ icsk->icsk_accept_queue.rskq_defer_accept++;
+ icsk->icsk_accept_queue.rskq_defer_accept++;
}
break;
@@ -2081,16 +1845,16 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
case TCP_QUICKACK:
if (!val) {
- tp->ack.pingpong = 1;
+ icsk->icsk_ack.pingpong = 1;
} else {
- tp->ack.pingpong = 0;
+ icsk->icsk_ack.pingpong = 0;
if ((1 << sk->sk_state) &
(TCPF_ESTABLISHED | TCPF_CLOSE_WAIT) &&
- tcp_ack_scheduled(tp)) {
- tp->ack.pending |= TCP_ACK_PUSHED;
+ inet_csk_ack_scheduled(sk)) {
+ icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;
cleanup_rbuf(sk, 1);
if (!(val & 1))
- tp->ack.pingpong = 1;
+ icsk->icsk_ack.pingpong = 1;
}
}
break;
@@ -2107,15 +1871,16 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
void tcp_get_info(struct sock *sk, struct tcp_info *info)
{
struct tcp_sock *tp = tcp_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
u32 now = tcp_time_stamp;
memset(info, 0, sizeof(*info));
info->tcpi_state = sk->sk_state;
- info->tcpi_ca_state = tp->ca_state;
- info->tcpi_retransmits = tp->retransmits;
- info->tcpi_probes = tp->probes_out;
- info->tcpi_backoff = tp->backoff;
+ info->tcpi_ca_state = icsk->icsk_ca_state;
+ info->tcpi_retransmits = icsk->icsk_retransmits;
+ info->tcpi_probes = icsk->icsk_probes_out;
+ info->tcpi_backoff = icsk->icsk_backoff;
if (tp->rx_opt.tstamp_ok)
info->tcpi_options |= TCPI_OPT_TIMESTAMPS;
@@ -2130,10 +1895,10 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
if (tp->ecn_flags&TCP_ECN_OK)
info->tcpi_options |= TCPI_OPT_ECN;
- info->tcpi_rto = jiffies_to_usecs(tp->rto);
- info->tcpi_ato = jiffies_to_usecs(tp->ack.ato);
+ info->tcpi_rto = jiffies_to_usecs(icsk->icsk_rto);
+ info->tcpi_ato = jiffies_to_usecs(icsk->icsk_ack.ato);
info->tcpi_snd_mss = tp->mss_cache;
- info->tcpi_rcv_mss = tp->ack.rcv_mss;
+ info->tcpi_rcv_mss = icsk->icsk_ack.rcv_mss;
info->tcpi_unacked = tp->packets_out;
info->tcpi_sacked = tp->sacked_out;
@@ -2142,7 +1907,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_fackets = tp->fackets_out;
info->tcpi_last_data_sent = jiffies_to_msecs(now - tp->lsndtime);
- info->tcpi_last_data_recv = jiffies_to_msecs(now - tp->ack.lrcvtime);
+ info->tcpi_last_data_recv = jiffies_to_msecs(now - icsk->icsk_ack.lrcvtime);
info->tcpi_last_ack_recv = jiffies_to_msecs(now - tp->rcv_tstamp);
info->tcpi_pmtu = tp->pmtu_cookie;
@@ -2165,6 +1930,7 @@ EXPORT_SYMBOL_GPL(tcp_get_info);
int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
int __user *optlen)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
int val, len;
@@ -2202,7 +1968,7 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
val = tp->keepalive_probes ? : sysctl_tcp_keepalive_probes;
break;
case TCP_SYNCNT:
- val = tp->syn_retries ? : sysctl_tcp_syn_retries;
+ val = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
break;
case TCP_LINGER2:
val = tp->linger2;
@@ -2210,8 +1976,8 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
val = (val ? : sysctl_tcp_fin_timeout) / HZ;
break;
case TCP_DEFER_ACCEPT:
- val = !tp->defer_accept ? 0 : ((TCP_TIMEOUT_INIT / HZ) <<
- (tp->defer_accept - 1));
+ val = !icsk->icsk_accept_queue.rskq_defer_accept ? 0 :
+ ((TCP_TIMEOUT_INIT / HZ) << (icsk->icsk_accept_queue.rskq_defer_accept - 1));
break;
case TCP_WINDOW_CLAMP:
val = tp->window_clamp;
@@ -2232,7 +1998,7 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
return 0;
}
case TCP_QUICKACK:
- val = !tp->ack.pingpong;
+ val = !icsk->icsk_ack.pingpong;
break;
case TCP_CONGESTION:
@@ -2241,7 +2007,7 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
len = min_t(unsigned int, len, TCP_CA_NAME_MAX);
if (put_user(len, optlen))
return -EFAULT;
- if (copy_to_user(optval, tp->ca_ops->name, len))
+ if (copy_to_user(optval, icsk->icsk_ca_ops->name, len))
return -EFAULT;
return 0;
default:
@@ -2278,79 +2044,72 @@ void __init tcp_init(void)
__skb_cb_too_small_for_tcp(sizeof(struct tcp_skb_cb),
sizeof(skb->cb));
- tcp_bucket_cachep = kmem_cache_create("tcp_bind_bucket",
- sizeof(struct tcp_bind_bucket),
- 0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!tcp_bucket_cachep)
+ tcp_hashinfo.bind_bucket_cachep =
+ kmem_cache_create("tcp_bind_bucket",
+ sizeof(struct inet_bind_bucket), 0,
+ SLAB_HWCACHE_ALIGN, NULL, NULL);
+ if (!tcp_hashinfo.bind_bucket_cachep)
panic("tcp_init: Cannot alloc tcp_bind_bucket cache.");
- tcp_timewait_cachep = kmem_cache_create("tcp_tw_bucket",
- sizeof(struct tcp_tw_bucket),
- 0, SLAB_HWCACHE_ALIGN,
- NULL, NULL);
- if (!tcp_timewait_cachep)
- panic("tcp_init: Cannot alloc tcp_tw_bucket cache.");
-
/* Size and allocate the main established and bind bucket
* hash tables.
*
* The methodology is similar to that of the buffer cache.
*/
- tcp_ehash = (struct tcp_ehash_bucket *)
+ tcp_hashinfo.ehash =
alloc_large_system_hash("TCP established",
- sizeof(struct tcp_ehash_bucket),
+ sizeof(struct inet_ehash_bucket),
thash_entries,
(num_physpages >= 128 * 1024) ?
(25 - PAGE_SHIFT) :
(27 - PAGE_SHIFT),
HASH_HIGHMEM,
- &tcp_ehash_size,
+ &tcp_hashinfo.ehash_size,
NULL,
0);
- tcp_ehash_size = (1 << tcp_ehash_size) >> 1;
- for (i = 0; i < (tcp_ehash_size << 1); i++) {
- rwlock_init(&tcp_ehash[i].lock);
- INIT_HLIST_HEAD(&tcp_ehash[i].chain);
+ tcp_hashinfo.ehash_size = (1 << tcp_hashinfo.ehash_size) >> 1;
+ for (i = 0; i < (tcp_hashinfo.ehash_size << 1); i++) {
+ rwlock_init(&tcp_hashinfo.ehash[i].lock);
+ INIT_HLIST_HEAD(&tcp_hashinfo.ehash[i].chain);
}
- tcp_bhash = (struct tcp_bind_hashbucket *)
+ tcp_hashinfo.bhash =
alloc_large_system_hash("TCP bind",
- sizeof(struct tcp_bind_hashbucket),
- tcp_ehash_size,
+ sizeof(struct inet_bind_hashbucket),
+ tcp_hashinfo.ehash_size,
(num_physpages >= 128 * 1024) ?
(25 - PAGE_SHIFT) :
(27 - PAGE_SHIFT),
HASH_HIGHMEM,
- &tcp_bhash_size,
+ &tcp_hashinfo.bhash_size,
NULL,
64 * 1024);
- tcp_bhash_size = 1 << tcp_bhash_size;
- for (i = 0; i < tcp_bhash_size; i++) {
- spin_lock_init(&tcp_bhash[i].lock);
- INIT_HLIST_HEAD(&tcp_bhash[i].chain);
+ tcp_hashinfo.bhash_size = 1 << tcp_hashinfo.bhash_size;
+ for (i = 0; i < tcp_hashinfo.bhash_size; i++) {
+ spin_lock_init(&tcp_hashinfo.bhash[i].lock);
+ INIT_HLIST_HEAD(&tcp_hashinfo.bhash[i].chain);
}
/* Try to be a bit smarter and adjust defaults depending
* on available memory.
*/
for (order = 0; ((1 << order) << PAGE_SHIFT) <
- (tcp_bhash_size * sizeof(struct tcp_bind_hashbucket));
+ (tcp_hashinfo.bhash_size * sizeof(struct inet_bind_hashbucket));
order++)
;
if (order >= 4) {
sysctl_local_port_range[0] = 32768;
sysctl_local_port_range[1] = 61000;
- sysctl_tcp_max_tw_buckets = 180000;
+ tcp_death_row.sysctl_max_tw_buckets = 180000;
sysctl_tcp_max_orphans = 4096 << (order - 4);
sysctl_max_syn_backlog = 1024;
} else if (order < 3) {
sysctl_local_port_range[0] = 1024 * (3 - order);
- sysctl_tcp_max_tw_buckets >>= (3 - order);
+ tcp_death_row.sysctl_max_tw_buckets >>= (3 - order);
sysctl_tcp_max_orphans >>= (3 - order);
sysctl_max_syn_backlog = 128;
}
- tcp_port_rover = sysctl_local_port_range[0] - 1;
+ tcp_hashinfo.port_rover = sysctl_local_port_range[0] - 1;
sysctl_tcp_mem[0] = 768 << order;
sysctl_tcp_mem[1] = 1024 << order;
@@ -2365,14 +2124,12 @@ void __init tcp_init(void)
printk(KERN_INFO "TCP: Hash tables configured "
"(established %d bind %d)\n",
- tcp_ehash_size << 1, tcp_bhash_size);
+ tcp_hashinfo.ehash_size << 1, tcp_hashinfo.bhash_size);
tcp_register_congestion_control(&tcp_reno);
}
-EXPORT_SYMBOL(tcp_accept);
EXPORT_SYMBOL(tcp_close);
-EXPORT_SYMBOL(tcp_destroy_sock);
EXPORT_SYMBOL(tcp_disconnect);
EXPORT_SYMBOL(tcp_getsockopt);
EXPORT_SYMBOL(tcp_ioctl);
@@ -2384,4 +2141,3 @@ EXPORT_SYMBOL(tcp_sendpage);
EXPORT_SYMBOL(tcp_setsockopt);
EXPORT_SYMBOL(tcp_shutdown);
EXPORT_SYMBOL(tcp_statistics);
-EXPORT_SYMBOL(tcp_timewait_cachep);
diff --git a/net/ipv4/tcp_bic.c b/net/ipv4/tcp_bic.c
index ec38d45d6649..b940346de4e7 100644
--- a/net/ipv4/tcp_bic.c
+++ b/net/ipv4/tcp_bic.c
@@ -86,11 +86,11 @@ static inline void bictcp_reset(struct bictcp *ca)
ca->delayed_ack = 2 << ACK_RATIO_SHIFT;
}
-static void bictcp_init(struct tcp_sock *tp)
+static void bictcp_init(struct sock *sk)
{
- bictcp_reset(tcp_ca(tp));
+ bictcp_reset(inet_csk_ca(sk));
if (initial_ssthresh)
- tp->snd_ssthresh = initial_ssthresh;
+ tcp_sk(sk)->snd_ssthresh = initial_ssthresh;
}
/*
@@ -156,9 +156,10 @@ static inline void bictcp_update(struct bictcp *ca, u32 cwnd)
/* Detect low utilization in congestion avoidance */
-static inline void bictcp_low_utilization(struct tcp_sock *tp, int flag)
+static inline void bictcp_low_utilization(struct sock *sk, int flag)
{
- struct bictcp *ca = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct bictcp *ca = inet_csk_ca(sk);
u32 dist, delay;
/* No time stamp */
@@ -208,12 +209,13 @@ static inline void bictcp_low_utilization(struct tcp_sock *tp, int flag)
}
-static void bictcp_cong_avoid(struct tcp_sock *tp, u32 ack,
+static void bictcp_cong_avoid(struct sock *sk, u32 ack,
u32 seq_rtt, u32 in_flight, int data_acked)
{
- struct bictcp *ca = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct bictcp *ca = inet_csk_ca(sk);
- bictcp_low_utilization(tp, data_acked);
+ bictcp_low_utilization(sk, data_acked);
if (in_flight < tp->snd_cwnd)
return;
@@ -242,9 +244,10 @@ static void bictcp_cong_avoid(struct tcp_sock *tp, u32 ack,
* behave like Reno until low_window is reached,
* then increase congestion window slowly
*/
-static u32 bictcp_recalc_ssthresh(struct tcp_sock *tp)
+static u32 bictcp_recalc_ssthresh(struct sock *sk)
{
- struct bictcp *ca = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct bictcp *ca = inet_csk_ca(sk);
ca->epoch_start = 0; /* end of epoch */
@@ -269,31 +272,34 @@ static u32 bictcp_recalc_ssthresh(struct tcp_sock *tp)
return max((tp->snd_cwnd * beta) / BICTCP_BETA_SCALE, 2U);
}
-static u32 bictcp_undo_cwnd(struct tcp_sock *tp)
+static u32 bictcp_undo_cwnd(struct sock *sk)
{
- struct bictcp *ca = tcp_ca(tp);
-
+ const struct tcp_sock *tp = tcp_sk(sk);
+ const struct bictcp *ca = inet_csk_ca(sk);
return max(tp->snd_cwnd, ca->last_max_cwnd);
}
-static u32 bictcp_min_cwnd(struct tcp_sock *tp)
+static u32 bictcp_min_cwnd(struct sock *sk)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return tp->snd_ssthresh;
}
-static void bictcp_state(struct tcp_sock *tp, u8 new_state)
+static void bictcp_state(struct sock *sk, u8 new_state)
{
if (new_state == TCP_CA_Loss)
- bictcp_reset(tcp_ca(tp));
+ bictcp_reset(inet_csk_ca(sk));
}
/* Track delayed acknowledgement ratio using sliding window
* ratio = (15*ratio + sample) / 16
*/
-static void bictcp_acked(struct tcp_sock *tp, u32 cnt)
+static void bictcp_acked(struct sock *sk, u32 cnt)
{
- if (cnt > 0 && tp->ca_state == TCP_CA_Open) {
- struct bictcp *ca = tcp_ca(tp);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (cnt > 0 && icsk->icsk_ca_state == TCP_CA_Open) {
+ struct bictcp *ca = inet_csk_ca(sk);
cnt -= ca->delayed_ack >> ACK_RATIO_SHIFT;
ca->delayed_ack += cnt;
}
@@ -314,7 +320,7 @@ static struct tcp_congestion_ops bictcp = {
static int __init bictcp_register(void)
{
- BUG_ON(sizeof(struct bictcp) > TCP_CA_PRIV_SIZE);
+ BUG_ON(sizeof(struct bictcp) > ICSK_CA_PRIV_SIZE);
return tcp_register_congestion_control(&bictcp);
}
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index 4970d10a7785..bbf2d6624e89 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -73,33 +73,36 @@ void tcp_unregister_congestion_control(struct tcp_congestion_ops *ca)
EXPORT_SYMBOL_GPL(tcp_unregister_congestion_control);
/* Assign choice of congestion control. */
-void tcp_init_congestion_control(struct tcp_sock *tp)
+void tcp_init_congestion_control(struct sock *sk)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_congestion_ops *ca;
- if (tp->ca_ops != &tcp_init_congestion_ops)
+ if (icsk->icsk_ca_ops != &tcp_init_congestion_ops)
return;
rcu_read_lock();
list_for_each_entry_rcu(ca, &tcp_cong_list, list) {
if (try_module_get(ca->owner)) {
- tp->ca_ops = ca;
+ icsk->icsk_ca_ops = ca;
break;
}
}
rcu_read_unlock();
- if (tp->ca_ops->init)
- tp->ca_ops->init(tp);
+ if (icsk->icsk_ca_ops->init)
+ icsk->icsk_ca_ops->init(sk);
}
/* Manage refcounts on socket close. */
-void tcp_cleanup_congestion_control(struct tcp_sock *tp)
+void tcp_cleanup_congestion_control(struct sock *sk)
{
- if (tp->ca_ops->release)
- tp->ca_ops->release(tp);
- module_put(tp->ca_ops->owner);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (icsk->icsk_ca_ops->release)
+ icsk->icsk_ca_ops->release(sk);
+ module_put(icsk->icsk_ca_ops->owner);
}
/* Used by sysctl to change default congestion control */
@@ -143,14 +146,15 @@ void tcp_get_default_congestion_control(char *name)
}
/* Change congestion control for socket */
-int tcp_set_congestion_control(struct tcp_sock *tp, const char *name)
+int tcp_set_congestion_control(struct sock *sk, const char *name)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_congestion_ops *ca;
int err = 0;
rcu_read_lock();
ca = tcp_ca_find(name);
- if (ca == tp->ca_ops)
+ if (ca == icsk->icsk_ca_ops)
goto out;
if (!ca)
@@ -160,10 +164,10 @@ int tcp_set_congestion_control(struct tcp_sock *tp, const char *name)
err = -EBUSY;
else {
- tcp_cleanup_congestion_control(tp);
- tp->ca_ops = ca;
- if (tp->ca_ops->init)
- tp->ca_ops->init(tp);
+ tcp_cleanup_congestion_control(sk);
+ icsk->icsk_ca_ops = ca;
+ if (icsk->icsk_ca_ops->init)
+ icsk->icsk_ca_ops->init(sk);
}
out:
rcu_read_unlock();
@@ -177,9 +181,11 @@ int tcp_set_congestion_control(struct tcp_sock *tp, const char *name)
/* This is Jacobson's slow start and congestion avoidance.
* SIGCOMM '88, p. 328.
*/
-void tcp_reno_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, u32 in_flight,
+void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight,
int flag)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (in_flight < tp->snd_cwnd)
return;
@@ -202,15 +208,17 @@ void tcp_reno_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt, u32 in_flight,
EXPORT_SYMBOL_GPL(tcp_reno_cong_avoid);
/* Slow start threshold is half the congestion window (min 2) */
-u32 tcp_reno_ssthresh(struct tcp_sock *tp)
+u32 tcp_reno_ssthresh(struct sock *sk)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return max(tp->snd_cwnd >> 1U, 2U);
}
EXPORT_SYMBOL_GPL(tcp_reno_ssthresh);
/* Lower bound on congestion window. */
-u32 tcp_reno_min_cwnd(struct tcp_sock *tp)
+u32 tcp_reno_min_cwnd(struct sock *sk)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return tp->snd_ssthresh/2;
}
EXPORT_SYMBOL_GPL(tcp_reno_min_cwnd);
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index f66945cb158f..c148c1081880 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -1,5 +1,5 @@
/*
- * tcp_diag.c Module for monitoring TCP sockets.
+ * tcp_diag.c Module for monitoring TCP transport protocols sockets.
*
* Version: $Id: tcp_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
*
@@ -12,779 +12,43 @@
*/
#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/random.h>
-#include <linux/cache.h>
-#include <linux/init.h>
-#include <linux/time.h>
-
-#include <net/icmp.h>
-#include <net/tcp.h>
-#include <net/ipv6.h>
-#include <net/inet_common.h>
-
-#include <linux/inet.h>
-#include <linux/stddef.h>
-
-#include <linux/tcp_diag.h>
-struct tcpdiag_entry
-{
- u32 *saddr;
- u32 *daddr;
- u16 sport;
- u16 dport;
- u16 family;
- u16 userlocks;
-};
+#include <linux/module.h>
+#include <linux/inet_diag.h>
-static struct sock *tcpnl;
+#include <linux/tcp.h>
-#define TCPDIAG_PUT(skb, attrtype, attrlen) \
- RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
+#include <net/tcp.h>
-static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
- int ext, u32 pid, u32 seq, u16 nlmsg_flags)
+static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
+ void *_info)
{
- struct inet_sock *inet = inet_sk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
- struct tcpdiagmsg *r;
- struct nlmsghdr *nlh;
- struct tcp_info *info = NULL;
- struct tcpdiag_meminfo *minfo = NULL;
- unsigned char *b = skb->tail;
-
- nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
- nlh->nlmsg_flags = nlmsg_flags;
- r = NLMSG_DATA(nlh);
- if (sk->sk_state != TCP_TIME_WAIT) {
- if (ext & (1<<(TCPDIAG_MEMINFO-1)))
- minfo = TCPDIAG_PUT(skb, TCPDIAG_MEMINFO, sizeof(*minfo));
- if (ext & (1<<(TCPDIAG_INFO-1)))
- info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));
-
- if (ext & (1<<(TCPDIAG_CONG-1))) {
- size_t len = strlen(tp->ca_ops->name);
- strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1),
- tp->ca_ops->name);
- }
- }
- r->tcpdiag_family = sk->sk_family;
- r->tcpdiag_state = sk->sk_state;
- r->tcpdiag_timer = 0;
- r->tcpdiag_retrans = 0;
-
- r->id.tcpdiag_if = sk->sk_bound_dev_if;
- r->id.tcpdiag_cookie[0] = (u32)(unsigned long)sk;
- r->id.tcpdiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
-
- if (r->tcpdiag_state == TCP_TIME_WAIT) {
- struct tcp_tw_bucket *tw = (struct tcp_tw_bucket*)sk;
- long tmo = tw->tw_ttd - jiffies;
- if (tmo < 0)
- tmo = 0;
-
- r->id.tcpdiag_sport = tw->tw_sport;
- r->id.tcpdiag_dport = tw->tw_dport;
- r->id.tcpdiag_src[0] = tw->tw_rcv_saddr;
- r->id.tcpdiag_dst[0] = tw->tw_daddr;
- r->tcpdiag_state = tw->tw_substate;
- r->tcpdiag_timer = 3;
- r->tcpdiag_expires = (tmo*1000+HZ-1)/HZ;
- r->tcpdiag_rqueue = 0;
- r->tcpdiag_wqueue = 0;
- r->tcpdiag_uid = 0;
- r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (r->tcpdiag_family == AF_INET6) {
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
- &tw->tw_v6_rcv_saddr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
- &tw->tw_v6_daddr);
- }
-#endif
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
- }
-
- r->id.tcpdiag_sport = inet->sport;
- r->id.tcpdiag_dport = inet->dport;
- r->id.tcpdiag_src[0] = inet->rcv_saddr;
- r->id.tcpdiag_dst[0] = inet->daddr;
-
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (r->tcpdiag_family == AF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
- &np->rcv_saddr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
- &np->daddr);
- }
-#endif
-
-#define EXPIRES_IN_MS(tmo) ((tmo-jiffies)*1000+HZ-1)/HZ
-
- if (tp->pending == TCP_TIME_RETRANS) {
- r->tcpdiag_timer = 1;
- r->tcpdiag_retrans = tp->retransmits;
- r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
- } else if (tp->pending == TCP_TIME_PROBE0) {
- r->tcpdiag_timer = 4;
- r->tcpdiag_retrans = tp->probes_out;
- r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
- } else if (timer_pending(&sk->sk_timer)) {
- r->tcpdiag_timer = 2;
- r->tcpdiag_retrans = tp->probes_out;
- r->tcpdiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
- } else {
- r->tcpdiag_timer = 0;
- r->tcpdiag_expires = 0;
- }
-#undef EXPIRES_IN_MS
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct tcp_info *info = _info;
- r->tcpdiag_rqueue = tp->rcv_nxt - tp->copied_seq;
- r->tcpdiag_wqueue = tp->write_seq - tp->snd_una;
- r->tcpdiag_uid = sock_i_uid(sk);
- r->tcpdiag_inode = sock_i_ino(sk);
-
- if (minfo) {
- minfo->tcpdiag_rmem = atomic_read(&sk->sk_rmem_alloc);
- minfo->tcpdiag_wmem = sk->sk_wmem_queued;
- minfo->tcpdiag_fmem = sk->sk_forward_alloc;
- minfo->tcpdiag_tmem = atomic_read(&sk->sk_wmem_alloc);
- }
-
- if (info)
+ r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
+ r->idiag_wqueue = tp->write_seq - tp->snd_una;
+ if (info != NULL)
tcp_get_info(sk, info);
-
- if (sk->sk_state < TCP_TIME_WAIT && tp->ca_ops->get_info)
- tp->ca_ops->get_info(tp, ext, skb);
-
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
-
-rtattr_failure:
-nlmsg_failure:
- skb_trim(skb, b - skb->data);
- return -1;
-}
-
-extern struct sock *tcp_v4_lookup(u32 saddr, u16 sport, u32 daddr, u16 dport,
- int dif);
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-extern struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 dport,
- int dif);
-#else
-static inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 dport,
- int dif)
-{
- return NULL;
-}
-#endif
-
-static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
-{
- int err;
- struct sock *sk;
- struct tcpdiagreq *req = NLMSG_DATA(nlh);
- struct sk_buff *rep;
-
- if (req->tcpdiag_family == AF_INET) {
- sk = tcp_v4_lookup(req->id.tcpdiag_dst[0], req->id.tcpdiag_dport,
- req->id.tcpdiag_src[0], req->id.tcpdiag_sport,
- req->id.tcpdiag_if);
- }
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- else if (req->tcpdiag_family == AF_INET6) {
- sk = tcp_v6_lookup((struct in6_addr*)req->id.tcpdiag_dst, req->id.tcpdiag_dport,
- (struct in6_addr*)req->id.tcpdiag_src, req->id.tcpdiag_sport,
- req->id.tcpdiag_if);
- }
-#endif
- else {
- return -EINVAL;
- }
-
- if (sk == NULL)
- return -ENOENT;
-
- err = -ESTALE;
- if ((req->id.tcpdiag_cookie[0] != TCPDIAG_NOCOOKIE ||
- req->id.tcpdiag_cookie[1] != TCPDIAG_NOCOOKIE) &&
- ((u32)(unsigned long)sk != req->id.tcpdiag_cookie[0] ||
- (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.tcpdiag_cookie[1]))
- goto out;
-
- err = -ENOMEM;
- rep = alloc_skb(NLMSG_SPACE(sizeof(struct tcpdiagmsg)+
- sizeof(struct tcpdiag_meminfo)+
- sizeof(struct tcp_info)+64), GFP_KERNEL);
- if (!rep)
- goto out;
-
- if (tcpdiag_fill(rep, sk, req->tcpdiag_ext,
- NETLINK_CB(in_skb).pid,
- nlh->nlmsg_seq, 0) <= 0)
- BUG();
-
- err = netlink_unicast(tcpnl, rep, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
- if (err > 0)
- err = 0;
-
-out:
- if (sk) {
- if (sk->sk_state == TCP_TIME_WAIT)
- tcp_tw_put((struct tcp_tw_bucket*)sk);
- else
- sock_put(sk);
- }
- return err;
-}
-
-static int bitstring_match(const u32 *a1, const u32 *a2, int bits)
-{
- int words = bits >> 5;
-
- bits &= 0x1f;
-
- if (words) {
- if (memcmp(a1, a2, words << 2))
- return 0;
- }
- if (bits) {
- __u32 w1, w2;
- __u32 mask;
-
- w1 = a1[words];
- w2 = a2[words];
-
- mask = htonl((0xffffffff) << (32 - bits));
-
- if ((w1 ^ w2) & mask)
- return 0;
- }
-
- return 1;
-}
-
-
-static int tcpdiag_bc_run(const void *bc, int len,
- const struct tcpdiag_entry *entry)
-{
- while (len > 0) {
- int yes = 1;
- const struct tcpdiag_bc_op *op = bc;
-
- switch (op->code) {
- case TCPDIAG_BC_NOP:
- break;
- case TCPDIAG_BC_JMP:
- yes = 0;
- break;
- case TCPDIAG_BC_S_GE:
- yes = entry->sport >= op[1].no;
- break;
- case TCPDIAG_BC_S_LE:
- yes = entry->dport <= op[1].no;
- break;
- case TCPDIAG_BC_D_GE:
- yes = entry->dport >= op[1].no;
- break;
- case TCPDIAG_BC_D_LE:
- yes = entry->dport <= op[1].no;
- break;
- case TCPDIAG_BC_AUTO:
- yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
- break;
- case TCPDIAG_BC_S_COND:
- case TCPDIAG_BC_D_COND:
- {
- struct tcpdiag_hostcond *cond = (struct tcpdiag_hostcond*)(op+1);
- u32 *addr;
-
- if (cond->port != -1 &&
- cond->port != (op->code == TCPDIAG_BC_S_COND ?
- entry->sport : entry->dport)) {
- yes = 0;
- break;
- }
-
- if (cond->prefix_len == 0)
- break;
-
- if (op->code == TCPDIAG_BC_S_COND)
- addr = entry->saddr;
- else
- addr = entry->daddr;
-
- if (bitstring_match(addr, cond->addr, cond->prefix_len))
- break;
- if (entry->family == AF_INET6 &&
- cond->family == AF_INET) {
- if (addr[0] == 0 && addr[1] == 0 &&
- addr[2] == htonl(0xffff) &&
- bitstring_match(addr+3, cond->addr, cond->prefix_len))
- break;
- }
- yes = 0;
- break;
- }
- }
-
- if (yes) {
- len -= op->yes;
- bc += op->yes;
- } else {
- len -= op->no;
- bc += op->no;
- }
- }
- return (len == 0);
-}
-
-static int valid_cc(const void *bc, int len, int cc)
-{
- while (len >= 0) {
- const struct tcpdiag_bc_op *op = bc;
-
- if (cc > len)
- return 0;
- if (cc == len)
- return 1;
- if (op->yes < 4)
- return 0;
- len -= op->yes;
- bc += op->yes;
- }
- return 0;
-}
-
-static int tcpdiag_bc_audit(const void *bytecode, int bytecode_len)
-{
- const unsigned char *bc = bytecode;
- int len = bytecode_len;
-
- while (len > 0) {
- struct tcpdiag_bc_op *op = (struct tcpdiag_bc_op*)bc;
-
-//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
- switch (op->code) {
- case TCPDIAG_BC_AUTO:
- case TCPDIAG_BC_S_COND:
- case TCPDIAG_BC_D_COND:
- case TCPDIAG_BC_S_GE:
- case TCPDIAG_BC_S_LE:
- case TCPDIAG_BC_D_GE:
- case TCPDIAG_BC_D_LE:
- if (op->yes < 4 || op->yes > len+4)
- return -EINVAL;
- case TCPDIAG_BC_JMP:
- if (op->no < 4 || op->no > len+4)
- return -EINVAL;
- if (op->no < len &&
- !valid_cc(bytecode, bytecode_len, len-op->no))
- return -EINVAL;
- break;
- case TCPDIAG_BC_NOP:
- if (op->yes < 4 || op->yes > len+4)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
- bc += op->yes;
- len -= op->yes;
- }
- return len == 0 ? 0 : -EINVAL;
-}
-
-static int tcpdiag_dump_sock(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
-{
- struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-
- if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
- struct tcpdiag_entry entry;
- struct rtattr *bc = (struct rtattr *)(r + 1);
- struct inet_sock *inet = inet_sk(sk);
-
- entry.family = sk->sk_family;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (entry.family == AF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- entry.saddr = np->rcv_saddr.s6_addr32;
- entry.daddr = np->daddr.s6_addr32;
- } else
-#endif
- {
- entry.saddr = &inet->rcv_saddr;
- entry.daddr = &inet->daddr;
- }
- entry.sport = inet->num;
- entry.dport = ntohs(inet->dport);
- entry.userlocks = sk->sk_userlocks;
-
- if (!tcpdiag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
- return 0;
- }
-
- return tcpdiag_fill(skb, sk, r->tcpdiag_ext, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, NLM_F_MULTI);
}
-static int tcpdiag_fill_req(struct sk_buff *skb, struct sock *sk,
- struct request_sock *req,
- u32 pid, u32 seq)
-{
- const struct inet_request_sock *ireq = inet_rsk(req);
- struct inet_sock *inet = inet_sk(sk);
- unsigned char *b = skb->tail;
- struct tcpdiagmsg *r;
- struct nlmsghdr *nlh;
- long tmo;
-
- nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
- nlh->nlmsg_flags = NLM_F_MULTI;
- r = NLMSG_DATA(nlh);
-
- r->tcpdiag_family = sk->sk_family;
- r->tcpdiag_state = TCP_SYN_RECV;
- r->tcpdiag_timer = 1;
- r->tcpdiag_retrans = req->retrans;
-
- r->id.tcpdiag_if = sk->sk_bound_dev_if;
- r->id.tcpdiag_cookie[0] = (u32)(unsigned long)req;
- r->id.tcpdiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
-
- tmo = req->expires - jiffies;
- if (tmo < 0)
- tmo = 0;
-
- r->id.tcpdiag_sport = inet->sport;
- r->id.tcpdiag_dport = ireq->rmt_port;
- r->id.tcpdiag_src[0] = ireq->loc_addr;
- r->id.tcpdiag_dst[0] = ireq->rmt_addr;
- r->tcpdiag_expires = jiffies_to_msecs(tmo),
- r->tcpdiag_rqueue = 0;
- r->tcpdiag_wqueue = 0;
- r->tcpdiag_uid = sock_i_uid(sk);
- r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (r->tcpdiag_family == AF_INET6) {
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
- &tcp6_rsk(req)->loc_addr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
- &tcp6_rsk(req)->rmt_addr);
- }
-#endif
- nlh->nlmsg_len = skb->tail - b;
-
- return skb->len;
-
-nlmsg_failure:
- skb_trim(skb, b - skb->data);
- return -1;
-}
-
-static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
-{
- struct tcpdiag_entry entry;
- struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
- struct tcp_sock *tp = tcp_sk(sk);
- struct listen_sock *lopt;
- struct rtattr *bc = NULL;
- struct inet_sock *inet = inet_sk(sk);
- int j, s_j;
- int reqnum, s_reqnum;
- int err = 0;
-
- s_j = cb->args[3];
- s_reqnum = cb->args[4];
-
- if (s_j > 0)
- s_j--;
-
- entry.family = sk->sk_family;
-
- read_lock_bh(&tp->accept_queue.syn_wait_lock);
-
- lopt = tp->accept_queue.listen_opt;
- if (!lopt || !lopt->qlen)
- goto out;
-
- if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
- bc = (struct rtattr *)(r + 1);
- entry.sport = inet->num;
- entry.userlocks = sk->sk_userlocks;
- }
-
- for (j = s_j; j < TCP_SYNQ_HSIZE; j++) {
- struct request_sock *req, *head = lopt->syn_table[j];
-
- reqnum = 0;
- for (req = head; req; reqnum++, req = req->dl_next) {
- struct inet_request_sock *ireq = inet_rsk(req);
-
- if (reqnum < s_reqnum)
- continue;
- if (r->id.tcpdiag_dport != ireq->rmt_port &&
- r->id.tcpdiag_dport)
- continue;
-
- if (bc) {
- entry.saddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- (entry.family == AF_INET6) ?
- tcp6_rsk(req)->loc_addr.s6_addr32 :
-#endif
- &ireq->loc_addr;
- entry.daddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- (entry.family == AF_INET6) ?
- tcp6_rsk(req)->rmt_addr.s6_addr32 :
-#endif
- &ireq->rmt_addr;
- entry.dport = ntohs(ireq->rmt_port);
-
- if (!tcpdiag_bc_run(RTA_DATA(bc),
- RTA_PAYLOAD(bc), &entry))
- continue;
- }
-
- err = tcpdiag_fill_req(skb, sk, req,
- NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq);
- if (err < 0) {
- cb->args[3] = j + 1;
- cb->args[4] = reqnum;
- goto out;
- }
- }
-
- s_reqnum = 0;
- }
-
-out:
- read_unlock_bh(&tp->accept_queue.syn_wait_lock);
-
- return err;
-}
-
-static int tcpdiag_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
- int i, num;
- int s_i, s_num;
- struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-
- s_i = cb->args[1];
- s_num = num = cb->args[2];
-
- if (cb->args[0] == 0) {
- if (!(r->tcpdiag_states&(TCPF_LISTEN|TCPF_SYN_RECV)))
- goto skip_listen_ht;
- tcp_listen_lock();
- for (i = s_i; i < TCP_LHTABLE_SIZE; i++) {
- struct sock *sk;
- struct hlist_node *node;
-
- num = 0;
- sk_for_each(sk, node, &tcp_listening_hash[i]) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num) {
- num++;
- continue;
- }
-
- if (r->id.tcpdiag_sport != inet->sport &&
- r->id.tcpdiag_sport)
- goto next_listen;
-
- if (!(r->tcpdiag_states&TCPF_LISTEN) ||
- r->id.tcpdiag_dport ||
- cb->args[3] > 0)
- goto syn_recv;
-
- if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
- tcp_listen_unlock();
- goto done;
- }
-
-syn_recv:
- if (!(r->tcpdiag_states&TCPF_SYN_RECV))
- goto next_listen;
-
- if (tcpdiag_dump_reqs(skb, sk, cb) < 0) {
- tcp_listen_unlock();
- goto done;
- }
-
-next_listen:
- cb->args[3] = 0;
- cb->args[4] = 0;
- ++num;
- }
-
- s_num = 0;
- cb->args[3] = 0;
- cb->args[4] = 0;
- }
- tcp_listen_unlock();
-skip_listen_ht:
- cb->args[0] = 1;
- s_i = num = s_num = 0;
- }
-
- if (!(r->tcpdiag_states&~(TCPF_LISTEN|TCPF_SYN_RECV)))
- return skb->len;
-
- for (i = s_i; i < tcp_ehash_size; i++) {
- struct tcp_ehash_bucket *head = &tcp_ehash[i];
- struct sock *sk;
- struct hlist_node *node;
-
- if (i > s_i)
- s_num = 0;
-
- read_lock_bh(&head->lock);
-
- num = 0;
- sk_for_each(sk, node, &head->chain) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num)
- goto next_normal;
- if (!(r->tcpdiag_states & (1 << sk->sk_state)))
- goto next_normal;
- if (r->id.tcpdiag_sport != inet->sport &&
- r->id.tcpdiag_sport)
- goto next_normal;
- if (r->id.tcpdiag_dport != inet->dport && r->id.tcpdiag_dport)
- goto next_normal;
- if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
- read_unlock_bh(&head->lock);
- goto done;
- }
-next_normal:
- ++num;
- }
-
- if (r->tcpdiag_states&TCPF_TIME_WAIT) {
- sk_for_each(sk, node,
- &tcp_ehash[i + tcp_ehash_size].chain) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num)
- goto next_dying;
- if (r->id.tcpdiag_sport != inet->sport &&
- r->id.tcpdiag_sport)
- goto next_dying;
- if (r->id.tcpdiag_dport != inet->dport &&
- r->id.tcpdiag_dport)
- goto next_dying;
- if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
- read_unlock_bh(&head->lock);
- goto done;
- }
-next_dying:
- ++num;
- }
- }
- read_unlock_bh(&head->lock);
- }
-
-done:
- cb->args[1] = i;
- cb->args[2] = num;
- return skb->len;
-}
-
-static int tcpdiag_dump_done(struct netlink_callback *cb)
-{
- return 0;
-}
-
-
-static __inline__ int
-tcpdiag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
-{
- if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
- return 0;
-
- if (nlh->nlmsg_type != TCPDIAG_GETSOCK)
- goto err_inval;
-
- if (NLMSG_LENGTH(sizeof(struct tcpdiagreq)) > skb->len)
- goto err_inval;
-
- if (nlh->nlmsg_flags&NLM_F_DUMP) {
- if (nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(struct tcpdiagreq))) {
- struct rtattr *rta = (struct rtattr*)(NLMSG_DATA(nlh) + sizeof(struct tcpdiagreq));
- if (rta->rta_type != TCPDIAG_REQ_BYTECODE ||
- rta->rta_len < 8 ||
- rta->rta_len > nlh->nlmsg_len - NLMSG_SPACE(sizeof(struct tcpdiagreq)))
- goto err_inval;
- if (tcpdiag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
- goto err_inval;
- }
- return netlink_dump_start(tcpnl, skb, nlh,
- tcpdiag_dump,
- tcpdiag_dump_done);
- } else {
- return tcpdiag_get_exact(skb, nlh);
- }
-
-err_inval:
- return -EINVAL;
-}
-
-
-static inline void tcpdiag_rcv_skb(struct sk_buff *skb)
-{
- int err;
- struct nlmsghdr * nlh;
-
- if (skb->len >= NLMSG_SPACE(0)) {
- nlh = (struct nlmsghdr *)skb->data;
- if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
- return;
- err = tcpdiag_rcv_msg(skb, nlh);
- if (err || nlh->nlmsg_flags & NLM_F_ACK)
- netlink_ack(skb, nlh, err);
- }
-}
-
-static void tcpdiag_rcv(struct sock *sk, int len)
-{
- struct sk_buff *skb;
- unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
-
- while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) {
- tcpdiag_rcv_skb(skb);
- kfree_skb(skb);
- }
-}
+static struct inet_diag_handler tcp_diag_handler = {
+ .idiag_hashinfo = &tcp_hashinfo,
+ .idiag_get_info = tcp_diag_get_info,
+ .idiag_type = TCPDIAG_GETSOCK,
+ .idiag_info_size = sizeof(struct tcp_info),
+};
-static int __init tcpdiag_init(void)
+static int __init tcp_diag_init(void)
{
- tcpnl = netlink_kernel_create(NETLINK_TCPDIAG, tcpdiag_rcv);
- if (tcpnl == NULL)
- return -ENOMEM;
- return 0;
+ return inet_diag_register(&tcp_diag_handler);
}
-static void __exit tcpdiag_exit(void)
+static void __exit tcp_diag_exit(void)
{
- sock_release(tcpnl->sk_socket);
+ inet_diag_unregister(&tcp_diag_handler);
}
-module_init(tcpdiag_init);
-module_exit(tcpdiag_exit);
+module_init(tcp_diag_init);
+module_exit(tcp_diag_exit);
MODULE_LICENSE("GPL");
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c
index 36c51f8136bf..6acc04bde080 100644
--- a/net/ipv4/tcp_highspeed.c
+++ b/net/ipv4/tcp_highspeed.c
@@ -98,9 +98,10 @@ struct hstcp {
u32 ai;
};
-static void hstcp_init(struct tcp_sock *tp)
+static void hstcp_init(struct sock *sk)
{
- struct hstcp *ca = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct hstcp *ca = inet_csk_ca(sk);
ca->ai = 0;
@@ -109,10 +110,11 @@ static void hstcp_init(struct tcp_sock *tp)
tp->snd_cwnd_clamp = min_t(u32, tp->snd_cwnd_clamp, 0xffffffff/128);
}
-static void hstcp_cong_avoid(struct tcp_sock *tp, u32 adk, u32 rtt,
+static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt,
u32 in_flight, int good)
{
- struct hstcp *ca = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct hstcp *ca = inet_csk_ca(sk);
if (in_flight < tp->snd_cwnd)
return;
@@ -143,9 +145,10 @@ static void hstcp_cong_avoid(struct tcp_sock *tp, u32 adk, u32 rtt,
}
}
-static u32 hstcp_ssthresh(struct tcp_sock *tp)
+static u32 hstcp_ssthresh(struct sock *sk)
{
- struct hstcp *ca = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ const struct hstcp *ca = inet_csk_ca(sk);
/* Do multiplicative decrease */
return max(tp->snd_cwnd - ((tp->snd_cwnd * hstcp_aimd_vals[ca->ai].md) >> 8), 2U);
@@ -164,7 +167,7 @@ static struct tcp_congestion_ops tcp_highspeed = {
static int __init hstcp_register(void)
{
- BUG_ON(sizeof(struct hstcp) > TCP_CA_PRIV_SIZE);
+ BUG_ON(sizeof(struct hstcp) > ICSK_CA_PRIV_SIZE);
return tcp_register_congestion_control(&tcp_highspeed);
}
diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c
index 40168275acf9..e47b37984e95 100644
--- a/net/ipv4/tcp_htcp.c
+++ b/net/ipv4/tcp_htcp.c
@@ -55,18 +55,21 @@ static inline void htcp_reset(struct htcp *ca)
ca->snd_cwnd_cnt2 = 0;
}
-static u32 htcp_cwnd_undo(struct tcp_sock *tp)
+static u32 htcp_cwnd_undo(struct sock *sk)
{
- struct htcp *ca = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct htcp *ca = inet_csk_ca(sk);
ca->ccount = ca->undo_ccount;
ca->maxRTT = ca->undo_maxRTT;
ca->old_maxB = ca->undo_old_maxB;
return max(tp->snd_cwnd, (tp->snd_ssthresh<<7)/ca->beta);
}
-static inline void measure_rtt(struct tcp_sock *tp)
+static inline void measure_rtt(struct sock *sk)
{
- struct htcp *ca = tcp_ca(tp);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct htcp *ca = inet_csk_ca(sk);
u32 srtt = tp->srtt>>3;
/* keep track of minimum RTT seen so far, minRTT is zero at first */
@@ -74,7 +77,7 @@ static inline void measure_rtt(struct tcp_sock *tp)
ca->minRTT = srtt;
/* max RTT */
- if (tp->ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) {
+ if (icsk->icsk_ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) {
if (ca->maxRTT < ca->minRTT)
ca->maxRTT = ca->minRTT;
if (ca->maxRTT < srtt && srtt <= ca->maxRTT+HZ/50)
@@ -82,13 +85,16 @@ static inline void measure_rtt(struct tcp_sock *tp)
}
}
-static void measure_achieved_throughput(struct tcp_sock *tp, u32 pkts_acked)
+static void measure_achieved_throughput(struct sock *sk, u32 pkts_acked)
{
- struct htcp *ca = tcp_ca(tp);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct htcp *ca = inet_csk_ca(sk);
u32 now = tcp_time_stamp;
/* achieved throughput calculations */
- if (tp->ca_state != TCP_CA_Open && tp->ca_state != TCP_CA_Disorder) {
+ if (icsk->icsk_ca_state != TCP_CA_Open &&
+ icsk->icsk_ca_state != TCP_CA_Disorder) {
ca->packetcount = 0;
ca->lasttime = now;
return;
@@ -173,9 +179,9 @@ static inline void htcp_alpha_update(struct htcp *ca)
* that point do we really have a real sense of maxRTT (the queues en route
* were getting just too full now).
*/
-static void htcp_param_update(struct tcp_sock *tp)
+static void htcp_param_update(struct sock *sk)
{
- struct htcp *ca = tcp_ca(tp);
+ struct htcp *ca = inet_csk_ca(sk);
u32 minRTT = ca->minRTT;
u32 maxRTT = ca->maxRTT;
@@ -187,17 +193,19 @@ static void htcp_param_update(struct tcp_sock *tp)
ca->maxRTT = minRTT + ((maxRTT-minRTT)*95)/100;
}
-static u32 htcp_recalc_ssthresh(struct tcp_sock *tp)
+static u32 htcp_recalc_ssthresh(struct sock *sk)
{
- struct htcp *ca = tcp_ca(tp);
- htcp_param_update(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ const struct htcp *ca = inet_csk_ca(sk);
+ htcp_param_update(sk);
return max((tp->snd_cwnd * ca->beta) >> 7, 2U);
}
-static void htcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
+static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
u32 in_flight, int data_acked)
{
- struct htcp *ca = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct htcp *ca = inet_csk_ca(sk);
if (in_flight < tp->snd_cwnd)
return;
@@ -207,7 +215,7 @@ static void htcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
if (tp->snd_cwnd < tp->snd_cwnd_clamp)
tp->snd_cwnd++;
} else {
- measure_rtt(tp);
+ measure_rtt(sk);
/* keep track of number of round-trip times since last backoff event */
if (ca->snd_cwnd_cnt2++ > tp->snd_cwnd) {
@@ -229,28 +237,29 @@ static void htcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
}
/* Lower bound on congestion window. */
-static u32 htcp_min_cwnd(struct tcp_sock *tp)
+static u32 htcp_min_cwnd(struct sock *sk)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return tp->snd_ssthresh;
}
-static void htcp_init(struct tcp_sock *tp)
+static void htcp_init(struct sock *sk)
{
- struct htcp *ca = tcp_ca(tp);
+ struct htcp *ca = inet_csk_ca(sk);
memset(ca, 0, sizeof(struct htcp));
ca->alpha = ALPHA_BASE;
ca->beta = BETA_MIN;
}
-static void htcp_state(struct tcp_sock *tp, u8 new_state)
+static void htcp_state(struct sock *sk, u8 new_state)
{
switch (new_state) {
case TCP_CA_CWR:
case TCP_CA_Recovery:
case TCP_CA_Loss:
- htcp_reset(tcp_ca(tp));
+ htcp_reset(inet_csk_ca(sk));
break;
}
}
@@ -269,7 +278,7 @@ static struct tcp_congestion_ops htcp = {
static int __init htcp_register(void)
{
- BUG_ON(sizeof(struct htcp) > TCP_CA_PRIV_SIZE);
+ BUG_ON(sizeof(struct htcp) > ICSK_CA_PRIV_SIZE);
BUILD_BUG_ON(BETA_MIN >= BETA_MAX);
if (!use_bandwidth_switch)
htcp.pkts_acked = NULL;
diff --git a/net/ipv4/tcp_hybla.c b/net/ipv4/tcp_hybla.c
index 13a66342c304..77add63623df 100644
--- a/net/ipv4/tcp_hybla.c
+++ b/net/ipv4/tcp_hybla.c
@@ -33,19 +33,20 @@ MODULE_PARM_DESC(rtt0, "reference rout trip time (ms)");
/* This is called to refresh values for hybla parameters */
-static inline void hybla_recalc_param (struct tcp_sock *tp)
+static inline void hybla_recalc_param (struct sock *sk)
{
- struct hybla *ca = tcp_ca(tp);
+ struct hybla *ca = inet_csk_ca(sk);
- ca->rho_3ls = max_t(u32, tp->srtt / msecs_to_jiffies(rtt0), 8);
+ ca->rho_3ls = max_t(u32, tcp_sk(sk)->srtt / msecs_to_jiffies(rtt0), 8);
ca->rho = ca->rho_3ls >> 3;
ca->rho2_7ls = (ca->rho_3ls * ca->rho_3ls) << 1;
ca->rho2 = ca->rho2_7ls >>7;
}
-static void hybla_init(struct tcp_sock *tp)
+static void hybla_init(struct sock *sk)
{
- struct hybla *ca = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct hybla *ca = inet_csk_ca(sk);
ca->rho = 0;
ca->rho2 = 0;
@@ -57,17 +58,16 @@ static void hybla_init(struct tcp_sock *tp)
tp->snd_cwnd_clamp = 65535;
/* 1st Rho measurement based on initial srtt */
- hybla_recalc_param(tp);
+ hybla_recalc_param(sk);
/* set minimum rtt as this is the 1st ever seen */
ca->minrtt = tp->srtt;
tp->snd_cwnd = ca->rho;
}
-static void hybla_state(struct tcp_sock *tp, u8 ca_state)
+static void hybla_state(struct sock *sk, u8 ca_state)
{
- struct hybla *ca = tcp_ca(tp);
-
+ struct hybla *ca = inet_csk_ca(sk);
ca->hybla_en = (ca_state == TCP_CA_Open);
}
@@ -86,27 +86,28 @@ static inline u32 hybla_fraction(u32 odds)
* o Give cwnd a new value based on the model proposed
* o remember increments <1
*/
-static void hybla_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
+static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
u32 in_flight, int flag)
{
- struct hybla *ca = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct hybla *ca = inet_csk_ca(sk);
u32 increment, odd, rho_fractions;
int is_slowstart = 0;
/* Recalculate rho only if this srtt is the lowest */
if (tp->srtt < ca->minrtt){
- hybla_recalc_param(tp);
+ hybla_recalc_param(sk);
ca->minrtt = tp->srtt;
}
if (!ca->hybla_en)
- return tcp_reno_cong_avoid(tp, ack, rtt, in_flight, flag);
+ return tcp_reno_cong_avoid(sk, ack, rtt, in_flight, flag);
if (in_flight < tp->snd_cwnd)
return;
if (ca->rho == 0)
- hybla_recalc_param(tp);
+ hybla_recalc_param(sk);
rho_fractions = ca->rho_3ls - (ca->rho << 3);
@@ -170,7 +171,7 @@ static struct tcp_congestion_ops tcp_hybla = {
static int __init hybla_register(void)
{
- BUG_ON(sizeof(struct hybla) > TCP_CA_PRIV_SIZE);
+ BUG_ON(sizeof(struct hybla) > ICSK_CA_PRIV_SIZE);
return tcp_register_congestion_control(&tcp_hybla);
}
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 53a8a5399f1e..1afb080bdf0c 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -114,20 +114,21 @@ int sysctl_tcp_moderate_rcvbuf = 1;
/* Adapt the MSS value used to make delayed ack decision to the
* real world.
*/
-static inline void tcp_measure_rcv_mss(struct tcp_sock *tp,
- struct sk_buff *skb)
+static inline void tcp_measure_rcv_mss(struct sock *sk,
+ const struct sk_buff *skb)
{
- unsigned int len, lss;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ const unsigned int lss = icsk->icsk_ack.last_seg_size;
+ unsigned int len;
- lss = tp->ack.last_seg_size;
- tp->ack.last_seg_size = 0;
+ icsk->icsk_ack.last_seg_size = 0;
/* skb->len may jitter because of SACKs, even if peer
* sends good full-sized frames.
*/
len = skb->len;
- if (len >= tp->ack.rcv_mss) {
- tp->ack.rcv_mss = len;
+ if (len >= icsk->icsk_ack.rcv_mss) {
+ icsk->icsk_ack.rcv_mss = len;
} else {
/* Otherwise, we make more careful check taking into account,
* that SACKs block is variable.
@@ -147,41 +148,44 @@ static inline void tcp_measure_rcv_mss(struct tcp_sock *tp,
* tcp header plus fixed timestamp option length.
* Resulting "len" is MSS free of SACK jitter.
*/
- len -= tp->tcp_header_len;
- tp->ack.last_seg_size = len;
+ len -= tcp_sk(sk)->tcp_header_len;
+ icsk->icsk_ack.last_seg_size = len;
if (len == lss) {
- tp->ack.rcv_mss = len;
+ icsk->icsk_ack.rcv_mss = len;
return;
}
}
- tp->ack.pending |= TCP_ACK_PUSHED;
+ icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;
}
}
-static void tcp_incr_quickack(struct tcp_sock *tp)
+static void tcp_incr_quickack(struct sock *sk)
{
- unsigned quickacks = tp->rcv_wnd/(2*tp->ack.rcv_mss);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ unsigned quickacks = tcp_sk(sk)->rcv_wnd / (2 * icsk->icsk_ack.rcv_mss);
if (quickacks==0)
quickacks=2;
- if (quickacks > tp->ack.quick)
- tp->ack.quick = min(quickacks, TCP_MAX_QUICKACKS);
+ if (quickacks > icsk->icsk_ack.quick)
+ icsk->icsk_ack.quick = min(quickacks, TCP_MAX_QUICKACKS);
}
-void tcp_enter_quickack_mode(struct tcp_sock *tp)
+void tcp_enter_quickack_mode(struct sock *sk)
{
- tcp_incr_quickack(tp);
- tp->ack.pingpong = 0;
- tp->ack.ato = TCP_ATO_MIN;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ tcp_incr_quickack(sk);
+ icsk->icsk_ack.pingpong = 0;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
}
/* Send ACKs quickly, if "quick" count is not exhausted
* and the session is not interactive.
*/
-static __inline__ int tcp_in_quickack_mode(struct tcp_sock *tp)
+static inline int tcp_in_quickack_mode(const struct sock *sk)
{
- return (tp->ack.quick && !tp->ack.pingpong);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ return icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong;
}
/* Buffer size and advertised window tuning.
@@ -224,8 +228,8 @@ static void tcp_fixup_sndbuf(struct sock *sk)
*/
/* Slow part of check#2. */
-static int __tcp_grow_window(struct sock *sk, struct tcp_sock *tp,
- struct sk_buff *skb)
+static int __tcp_grow_window(const struct sock *sk, struct tcp_sock *tp,
+ const struct sk_buff *skb)
{
/* Optimize this! */
int truesize = tcp_win_from_space(skb->truesize)/2;
@@ -233,7 +237,7 @@ static int __tcp_grow_window(struct sock *sk, struct tcp_sock *tp,
while (tp->rcv_ssthresh <= window) {
if (truesize <= skb->len)
- return 2*tp->ack.rcv_mss;
+ return 2 * inet_csk(sk)->icsk_ack.rcv_mss;
truesize >>= 1;
window >>= 1;
@@ -260,7 +264,7 @@ static inline void tcp_grow_window(struct sock *sk, struct tcp_sock *tp,
if (incr) {
tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr, tp->window_clamp);
- tp->ack.quick |= 1;
+ inet_csk(sk)->icsk_ack.quick |= 1;
}
}
}
@@ -321,11 +325,12 @@ static void tcp_init_buffer_space(struct sock *sk)
/* 5. Recalculate window clamp after socket hit its memory bounds. */
static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct sk_buff *skb;
unsigned int app_win = tp->rcv_nxt - tp->copied_seq;
int ofo_win = 0;
- tp->ack.quick = 0;
+ icsk->icsk_ack.quick = 0;
skb_queue_walk(&tp->out_of_order_queue, skb) {
ofo_win += skb->len;
@@ -346,8 +351,8 @@ static void tcp_clamp_window(struct sock *sk, struct tcp_sock *tp)
app_win += ofo_win;
if (atomic_read(&sk->sk_rmem_alloc) >= 2 * sk->sk_rcvbuf)
app_win >>= 1;
- if (app_win > tp->ack.rcv_mss)
- app_win -= tp->ack.rcv_mss;
+ if (app_win > icsk->icsk_ack.rcv_mss)
+ app_win -= icsk->icsk_ack.rcv_mss;
app_win = max(app_win, 2U*tp->advmss);
if (!ofo_win)
@@ -415,11 +420,12 @@ new_measure:
tp->rcv_rtt_est.time = tcp_time_stamp;
}
-static inline void tcp_rcv_rtt_measure_ts(struct tcp_sock *tp, struct sk_buff *skb)
+static inline void tcp_rcv_rtt_measure_ts(struct sock *sk, const struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
if (tp->rx_opt.rcv_tsecr &&
(TCP_SKB_CB(skb)->end_seq -
- TCP_SKB_CB(skb)->seq >= tp->ack.rcv_mss))
+ TCP_SKB_CB(skb)->seq >= inet_csk(sk)->icsk_ack.rcv_mss))
tcp_rcv_rtt_update(tp, tcp_time_stamp - tp->rx_opt.rcv_tsecr, 0);
}
@@ -492,41 +498,42 @@ new_measure:
*/
static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
u32 now;
- tcp_schedule_ack(tp);
+ inet_csk_schedule_ack(sk);
- tcp_measure_rcv_mss(tp, skb);
+ tcp_measure_rcv_mss(sk, skb);
tcp_rcv_rtt_measure(tp);
now = tcp_time_stamp;
- if (!tp->ack.ato) {
+ if (!icsk->icsk_ack.ato) {
/* The _first_ data packet received, initialize
* delayed ACK engine.
*/
- tcp_incr_quickack(tp);
- tp->ack.ato = TCP_ATO_MIN;
+ tcp_incr_quickack(sk);
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
} else {
- int m = now - tp->ack.lrcvtime;
+ int m = now - icsk->icsk_ack.lrcvtime;
if (m <= TCP_ATO_MIN/2) {
/* The fastest case is the first. */
- tp->ack.ato = (tp->ack.ato>>1) + TCP_ATO_MIN/2;
- } else if (m < tp->ack.ato) {
- tp->ack.ato = (tp->ack.ato>>1) + m;
- if (tp->ack.ato > tp->rto)
- tp->ack.ato = tp->rto;
- } else if (m > tp->rto) {
+ icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + TCP_ATO_MIN / 2;
+ } else if (m < icsk->icsk_ack.ato) {
+ icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + m;
+ if (icsk->icsk_ack.ato > icsk->icsk_rto)
+ icsk->icsk_ack.ato = icsk->icsk_rto;
+ } else if (m > icsk->icsk_rto) {
/* Too long gap. Apparently sender falled to
* restart window, so that we send ACKs quickly.
*/
- tcp_incr_quickack(tp);
+ tcp_incr_quickack(sk);
sk_stream_mem_reclaim(sk);
}
}
- tp->ack.lrcvtime = now;
+ icsk->icsk_ack.lrcvtime = now;
TCP_ECN_check_ce(tp, skb);
@@ -543,8 +550,10 @@ static void tcp_event_data_recv(struct sock *sk, struct tcp_sock *tp, struct sk_
* To save cycles in the RFC 1323 implementation it was better to break
* it up into three procedures. -- erics
*/
-static void tcp_rtt_estimator(struct tcp_sock *tp, __u32 mrtt, u32 *usrtt)
+static void tcp_rtt_estimator(struct sock *sk, const __u32 mrtt, u32 *usrtt)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
long m = mrtt; /* RTT */
/* The following amusing code comes from Jacobson's
@@ -604,15 +613,16 @@ static void tcp_rtt_estimator(struct tcp_sock *tp, __u32 mrtt, u32 *usrtt)
tp->rtt_seq = tp->snd_nxt;
}
- if (tp->ca_ops->rtt_sample)
- tp->ca_ops->rtt_sample(tp, *usrtt);
+ if (icsk->icsk_ca_ops->rtt_sample)
+ icsk->icsk_ca_ops->rtt_sample(sk, *usrtt);
}
/* Calculate rto without backoff. This is the second half of Van Jacobson's
* routine referred to above.
*/
-static inline void tcp_set_rto(struct tcp_sock *tp)
+static inline void tcp_set_rto(struct sock *sk)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
/* Old crap is replaced with new one. 8)
*
* More seriously:
@@ -623,7 +633,7 @@ static inline void tcp_set_rto(struct tcp_sock *tp)
* is invisible. Actually, Linux-2.4 also generates erratic
* ACKs in some curcumstances.
*/
- tp->rto = (tp->srtt >> 3) + tp->rttvar;
+ inet_csk(sk)->icsk_rto = (tp->srtt >> 3) + tp->rttvar;
/* 2. Fixups made earlier cannot be right.
* If we do not estimate RTO correctly without them,
@@ -635,10 +645,10 @@ static inline void tcp_set_rto(struct tcp_sock *tp)
/* NOTE: clamping at TCP_RTO_MIN is not required, current algo
* guarantees that rto is higher.
*/
-static inline void tcp_bound_rto(struct tcp_sock *tp)
+static inline void tcp_bound_rto(struct sock *sk)
{
- if (tp->rto > TCP_RTO_MAX)
- tp->rto = TCP_RTO_MAX;
+ if (inet_csk(sk)->icsk_rto > TCP_RTO_MAX)
+ inet_csk(sk)->icsk_rto = TCP_RTO_MAX;
}
/* Save metrics learned by this TCP session.
@@ -656,9 +666,10 @@ void tcp_update_metrics(struct sock *sk)
dst_confirm(dst);
if (dst && (dst->flags&DST_HOST)) {
+ const struct inet_connection_sock *icsk = inet_csk(sk);
int m;
- if (tp->backoff || !tp->srtt) {
+ if (icsk->icsk_backoff || !tp->srtt) {
/* This session failed to estimate rtt. Why?
* Probably, no packets returned in time.
* Reset our results.
@@ -707,7 +718,7 @@ void tcp_update_metrics(struct sock *sk)
tp->snd_cwnd > dst_metric(dst, RTAX_CWND))
dst->metrics[RTAX_CWND-1] = tp->snd_cwnd;
} else if (tp->snd_cwnd > tp->snd_ssthresh &&
- tp->ca_state == TCP_CA_Open) {
+ icsk->icsk_ca_state == TCP_CA_Open) {
/* Cong. avoidance phase, cwnd is reliable. */
if (!dst_metric_locked(dst, RTAX_SSTHRESH))
dst->metrics[RTAX_SSTHRESH-1] =
@@ -801,9 +812,9 @@ static void tcp_init_metrics(struct sock *sk)
tp->mdev = dst_metric(dst, RTAX_RTTVAR);
tp->mdev_max = tp->rttvar = max(tp->mdev, TCP_RTO_MIN);
}
- tcp_set_rto(tp);
- tcp_bound_rto(tp);
- if (tp->rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp)
+ tcp_set_rto(sk);
+ tcp_bound_rto(sk);
+ if (inet_csk(sk)->icsk_rto < TCP_TIMEOUT_INIT && !tp->rx_opt.saw_tstamp)
goto reset;
tp->snd_cwnd = tcp_init_cwnd(tp, dst);
tp->snd_cwnd_stamp = tcp_time_stamp;
@@ -817,12 +828,14 @@ reset:
if (!tp->rx_opt.saw_tstamp && tp->srtt) {
tp->srtt = 0;
tp->mdev = tp->mdev_max = tp->rttvar = TCP_TIMEOUT_INIT;
- tp->rto = TCP_TIMEOUT_INIT;
+ inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT;
}
}
-static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts)
+static void tcp_update_reordering(struct sock *sk, const int metric,
+ const int ts)
{
+ struct tcp_sock *tp = tcp_sk(sk);
if (metric > tp->reordering) {
tp->reordering = min(TCP_MAX_REORDERING, metric);
@@ -837,7 +850,7 @@ static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts)
NET_INC_STATS_BH(LINUX_MIB_TCPSACKREORDER);
#if FASTRETRANS_DEBUG > 1
printk(KERN_DEBUG "Disorder%d %d %u f%u s%u rr%d\n",
- tp->rx_opt.sack_ok, tp->ca_state,
+ tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state,
tp->reordering,
tp->fackets_out,
tp->sacked_out,
@@ -899,6 +912,7 @@ static void tcp_update_reordering(struct tcp_sock *tp, int metric, int ts)
static int
tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_una)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
unsigned char *ptr = ack_skb->h.raw + TCP_SKB_CB(ack_skb)->sacked;
struct tcp_sack_block *sp = (struct tcp_sack_block *)(ptr+2);
@@ -1064,7 +1078,7 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
* we have to account for reordering! Ugly,
* but should help.
*/
- if (lost_retrans && tp->ca_state == TCP_CA_Recovery) {
+ if (lost_retrans && icsk->icsk_ca_state == TCP_CA_Recovery) {
struct sk_buff *skb;
sk_stream_for_retrans_queue(skb, sk) {
@@ -1093,8 +1107,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
tp->left_out = tp->sacked_out + tp->lost_out;
- if ((reord < tp->fackets_out) && tp->ca_state != TCP_CA_Loss)
- tcp_update_reordering(tp, ((tp->fackets_out + 1) - reord), 0);
+ if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss)
+ tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
#if FASTRETRANS_DEBUG > 0
BUG_TRAP((int)tp->sacked_out >= 0);
@@ -1111,17 +1125,18 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
*/
void tcp_enter_frto(struct sock *sk)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
tp->frto_counter = 1;
- if (tp->ca_state <= TCP_CA_Disorder ||
+ if (icsk->icsk_ca_state <= TCP_CA_Disorder ||
tp->snd_una == tp->high_seq ||
- (tp->ca_state == TCP_CA_Loss && !tp->retransmits)) {
- tp->prior_ssthresh = tcp_current_ssthresh(tp);
- tp->snd_ssthresh = tp->ca_ops->ssthresh(tp);
- tcp_ca_event(tp, CA_EVENT_FRTO);
+ (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) {
+ tp->prior_ssthresh = tcp_current_ssthresh(sk);
+ tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
+ tcp_ca_event(sk, CA_EVENT_FRTO);
}
/* Have to clear retransmission markers here to keep the bookkeeping
@@ -1138,7 +1153,7 @@ void tcp_enter_frto(struct sock *sk)
}
tcp_sync_left_out(tp);
- tcp_set_ca_state(tp, TCP_CA_Open);
+ tcp_set_ca_state(sk, TCP_CA_Open);
tp->frto_highmark = tp->snd_nxt;
}
@@ -1184,7 +1199,7 @@ static void tcp_enter_frto_loss(struct sock *sk)
tp->reordering = min_t(unsigned int, tp->reordering,
sysctl_tcp_reordering);
- tcp_set_ca_state(tp, TCP_CA_Loss);
+ tcp_set_ca_state(sk, TCP_CA_Loss);
tp->high_seq = tp->frto_highmark;
TCP_ECN_queue_cwr(tp);
}
@@ -1208,16 +1223,17 @@ void tcp_clear_retrans(struct tcp_sock *tp)
*/
void tcp_enter_loss(struct sock *sk, int how)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
int cnt = 0;
/* Reduce ssthresh if it has not yet been made inside this window. */
- if (tp->ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq ||
- (tp->ca_state == TCP_CA_Loss && !tp->retransmits)) {
- tp->prior_ssthresh = tcp_current_ssthresh(tp);
- tp->snd_ssthresh = tp->ca_ops->ssthresh(tp);
- tcp_ca_event(tp, CA_EVENT_LOSS);
+ if (icsk->icsk_ca_state <= TCP_CA_Disorder || tp->snd_una == tp->high_seq ||
+ (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) {
+ tp->prior_ssthresh = tcp_current_ssthresh(sk);
+ tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
+ tcp_ca_event(sk, CA_EVENT_LOSS);
}
tp->snd_cwnd = 1;
tp->snd_cwnd_cnt = 0;
@@ -1248,12 +1264,12 @@ void tcp_enter_loss(struct sock *sk, int how)
tp->reordering = min_t(unsigned int, tp->reordering,
sysctl_tcp_reordering);
- tcp_set_ca_state(tp, TCP_CA_Loss);
+ tcp_set_ca_state(sk, TCP_CA_Loss);
tp->high_seq = tp->snd_nxt;
TCP_ECN_queue_cwr(tp);
}
-static int tcp_check_sack_reneging(struct sock *sk, struct tcp_sock *tp)
+static int tcp_check_sack_reneging(struct sock *sk)
{
struct sk_buff *skb;
@@ -1265,12 +1281,14 @@ static int tcp_check_sack_reneging(struct sock *sk, struct tcp_sock *tp)
*/
if ((skb = skb_peek(&sk->sk_write_queue)) != NULL &&
(TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_ACKED)) {
+ struct inet_connection_sock *icsk = inet_csk(sk);
NET_INC_STATS_BH(LINUX_MIB_TCPSACKRENEGING);
tcp_enter_loss(sk, 1);
- tp->retransmits++;
+ icsk->icsk_retransmits++;
tcp_retransmit_skb(sk, skb_peek(&sk->sk_write_queue));
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ icsk->icsk_rto, TCP_RTO_MAX);
return 1;
}
return 0;
@@ -1281,15 +1299,15 @@ static inline int tcp_fackets_out(struct tcp_sock *tp)
return IsReno(tp) ? tp->sacked_out+1 : tp->fackets_out;
}
-static inline int tcp_skb_timedout(struct tcp_sock *tp, struct sk_buff *skb)
+static inline int tcp_skb_timedout(struct sock *sk, struct sk_buff *skb)
{
- return (tcp_time_stamp - TCP_SKB_CB(skb)->when > tp->rto);
+ return (tcp_time_stamp - TCP_SKB_CB(skb)->when > inet_csk(sk)->icsk_rto);
}
static inline int tcp_head_timedout(struct sock *sk, struct tcp_sock *tp)
{
return tp->packets_out &&
- tcp_skb_timedout(tp, skb_peek(&sk->sk_write_queue));
+ tcp_skb_timedout(sk, skb_peek(&sk->sk_write_queue));
}
/* Linux NewReno/SACK/FACK/ECN state machine.
@@ -1423,8 +1441,9 @@ static int tcp_time_to_recover(struct sock *sk, struct tcp_sock *tp)
* in assumption of absent reordering, interpret this as reordering.
* The only another reason could be bug in receiver TCP.
*/
-static void tcp_check_reno_reordering(struct tcp_sock *tp, int addend)
+static void tcp_check_reno_reordering(struct sock *sk, const int addend)
{
+ struct tcp_sock *tp = tcp_sk(sk);
u32 holes;
holes = max(tp->lost_out, 1U);
@@ -1432,16 +1451,17 @@ static void tcp_check_reno_reordering(struct tcp_sock *tp, int addend)
if ((tp->sacked_out + holes) > tp->packets_out) {
tp->sacked_out = tp->packets_out - holes;
- tcp_update_reordering(tp, tp->packets_out+addend, 0);
+ tcp_update_reordering(sk, tp->packets_out + addend, 0);
}
}
/* Emulate SACKs for SACKless connection: account for a new dupack. */
-static void tcp_add_reno_sack(struct tcp_sock *tp)
+static void tcp_add_reno_sack(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
tp->sacked_out++;
- tcp_check_reno_reordering(tp, 0);
+ tcp_check_reno_reordering(sk, 0);
tcp_sync_left_out(tp);
}
@@ -1456,7 +1476,7 @@ static void tcp_remove_reno_sacks(struct sock *sk, struct tcp_sock *tp, int acke
else
tp->sacked_out -= acked-1;
}
- tcp_check_reno_reordering(tp, acked);
+ tcp_check_reno_reordering(sk, acked);
tcp_sync_left_out(tp);
}
@@ -1509,7 +1529,7 @@ static void tcp_update_scoreboard(struct sock *sk, struct tcp_sock *tp)
struct sk_buff *skb;
sk_stream_for_retrans_queue(skb, sk) {
- if (tcp_skb_timedout(tp, skb) &&
+ if (tcp_skb_timedout(sk, skb) &&
!(TCP_SKB_CB(skb)->sacked&TCPCB_TAGBITS)) {
TCP_SKB_CB(skb)->sacked |= TCPCB_LOST;
tp->lost_out += tcp_skb_pcount(skb);
@@ -1530,14 +1550,16 @@ static inline void tcp_moderate_cwnd(struct tcp_sock *tp)
}
/* Decrease cwnd each second ack. */
-static void tcp_cwnd_down(struct tcp_sock *tp)
+static void tcp_cwnd_down(struct sock *sk)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct tcp_sock *tp = tcp_sk(sk);
int decr = tp->snd_cwnd_cnt + 1;
tp->snd_cwnd_cnt = decr&1;
decr >>= 1;
- if (decr && tp->snd_cwnd > tp->ca_ops->min_cwnd(tp))
+ if (decr && tp->snd_cwnd > icsk->icsk_ca_ops->min_cwnd(sk))
tp->snd_cwnd -= decr;
tp->snd_cwnd = min(tp->snd_cwnd, tcp_packets_in_flight(tp)+1);
@@ -1571,11 +1593,15 @@ static void DBGUNDO(struct sock *sk, struct tcp_sock *tp, const char *msg)
#define DBGUNDO(x...) do { } while (0)
#endif
-static void tcp_undo_cwr(struct tcp_sock *tp, int undo)
+static void tcp_undo_cwr(struct sock *sk, const int undo)
{
+ struct tcp_sock *tp = tcp_sk(sk);
+
if (tp->prior_ssthresh) {
- if (tp->ca_ops->undo_cwnd)
- tp->snd_cwnd = tp->ca_ops->undo_cwnd(tp);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+
+ if (icsk->icsk_ca_ops->undo_cwnd)
+ tp->snd_cwnd = icsk->icsk_ca_ops->undo_cwnd(sk);
else
tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh<<1);
@@ -1603,9 +1629,9 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp)
/* Happy end! We did not retransmit anything
* or our original transmission succeeded.
*/
- DBGUNDO(sk, tp, tp->ca_state == TCP_CA_Loss ? "loss" : "retrans");
- tcp_undo_cwr(tp, 1);
- if (tp->ca_state == TCP_CA_Loss)
+ DBGUNDO(sk, tp, inet_csk(sk)->icsk_ca_state == TCP_CA_Loss ? "loss" : "retrans");
+ tcp_undo_cwr(sk, 1);
+ if (inet_csk(sk)->icsk_ca_state == TCP_CA_Loss)
NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO);
else
NET_INC_STATS_BH(LINUX_MIB_TCPFULLUNDO);
@@ -1618,7 +1644,7 @@ static int tcp_try_undo_recovery(struct sock *sk, struct tcp_sock *tp)
tcp_moderate_cwnd(tp);
return 1;
}
- tcp_set_ca_state(tp, TCP_CA_Open);
+ tcp_set_ca_state(sk, TCP_CA_Open);
return 0;
}
@@ -1627,7 +1653,7 @@ static void tcp_try_undo_dsack(struct sock *sk, struct tcp_sock *tp)
{
if (tp->undo_marker && !tp->undo_retrans) {
DBGUNDO(sk, tp, "D-SACK");
- tcp_undo_cwr(tp, 1);
+ tcp_undo_cwr(sk, 1);
tp->undo_marker = 0;
NET_INC_STATS_BH(LINUX_MIB_TCPDSACKUNDO);
}
@@ -1648,10 +1674,10 @@ static int tcp_try_undo_partial(struct sock *sk, struct tcp_sock *tp,
if (tp->retrans_out == 0)
tp->retrans_stamp = 0;
- tcp_update_reordering(tp, tcp_fackets_out(tp)+acked, 1);
+ tcp_update_reordering(sk, tcp_fackets_out(tp) + acked, 1);
DBGUNDO(sk, tp, "Hoe");
- tcp_undo_cwr(tp, 0);
+ tcp_undo_cwr(sk, 0);
NET_INC_STATS_BH(LINUX_MIB_TCPPARTIALUNDO);
/* So... Do not make Hoe's retransmit yet.
@@ -1674,22 +1700,23 @@ static int tcp_try_undo_loss(struct sock *sk, struct tcp_sock *tp)
DBGUNDO(sk, tp, "partial loss");
tp->lost_out = 0;
tp->left_out = tp->sacked_out;
- tcp_undo_cwr(tp, 1);
+ tcp_undo_cwr(sk, 1);
NET_INC_STATS_BH(LINUX_MIB_TCPLOSSUNDO);
- tp->retransmits = 0;
+ inet_csk(sk)->icsk_retransmits = 0;
tp->undo_marker = 0;
if (!IsReno(tp))
- tcp_set_ca_state(tp, TCP_CA_Open);
+ tcp_set_ca_state(sk, TCP_CA_Open);
return 1;
}
return 0;
}
-static inline void tcp_complete_cwr(struct tcp_sock *tp)
+static inline void tcp_complete_cwr(struct sock *sk)
{
+ struct tcp_sock *tp = tcp_sk(sk);
tp->snd_cwnd = min(tp->snd_cwnd, tp->snd_ssthresh);
tp->snd_cwnd_stamp = tcp_time_stamp;
- tcp_ca_event(tp, CA_EVENT_COMPLETE_CWR);
+ tcp_ca_event(sk, CA_EVENT_COMPLETE_CWR);
}
static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag)
@@ -1700,21 +1727,21 @@ static void tcp_try_to_open(struct sock *sk, struct tcp_sock *tp, int flag)
tp->retrans_stamp = 0;
if (flag&FLAG_ECE)
- tcp_enter_cwr(tp);
+ tcp_enter_cwr(sk);
- if (tp->ca_state != TCP_CA_CWR) {
+ if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) {
int state = TCP_CA_Open;
if (tp->left_out || tp->retrans_out || tp->undo_marker)
state = TCP_CA_Disorder;
- if (tp->ca_state != state) {
- tcp_set_ca_state(tp, state);
+ if (inet_csk(sk)->icsk_ca_state != state) {
+ tcp_set_ca_state(sk, state);
tp->high_seq = tp->snd_nxt;
}
tcp_moderate_cwnd(tp);
} else {
- tcp_cwnd_down(tp);
+ tcp_cwnd_down(sk);
}
}
@@ -1733,6 +1760,7 @@ static void
tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
int prior_packets, int flag)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
int is_dupack = (tp->snd_una == prior_snd_una && !(flag&FLAG_NOT_DUP));
@@ -1750,13 +1778,13 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
tp->prior_ssthresh = 0;
/* B. In all the states check for reneging SACKs. */
- if (tp->sacked_out && tcp_check_sack_reneging(sk, tp))
+ if (tp->sacked_out && tcp_check_sack_reneging(sk))
return;
/* C. Process data loss notification, provided it is valid. */
if ((flag&FLAG_DATA_LOST) &&
before(tp->snd_una, tp->high_seq) &&
- tp->ca_state != TCP_CA_Open &&
+ icsk->icsk_ca_state != TCP_CA_Open &&
tp->fackets_out > tp->reordering) {
tcp_mark_head_lost(sk, tp, tp->fackets_out-tp->reordering, tp->high_seq);
NET_INC_STATS_BH(LINUX_MIB_TCPLOSS);
@@ -1767,14 +1795,14 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
/* E. Check state exit conditions. State can be terminated
* when high_seq is ACKed. */
- if (tp->ca_state == TCP_CA_Open) {
+ if (icsk->icsk_ca_state == TCP_CA_Open) {
if (!sysctl_tcp_frto)
BUG_TRAP(tp->retrans_out == 0);
tp->retrans_stamp = 0;
} else if (!before(tp->snd_una, tp->high_seq)) {
- switch (tp->ca_state) {
+ switch (icsk->icsk_ca_state) {
case TCP_CA_Loss:
- tp->retransmits = 0;
+ icsk->icsk_retransmits = 0;
if (tcp_try_undo_recovery(sk, tp))
return;
break;
@@ -1783,8 +1811,8 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
/* CWR is to be held something *above* high_seq
* is ACKed for CWR bit to reach receiver. */
if (tp->snd_una != tp->high_seq) {
- tcp_complete_cwr(tp);
- tcp_set_ca_state(tp, TCP_CA_Open);
+ tcp_complete_cwr(sk);
+ tcp_set_ca_state(sk, TCP_CA_Open);
}
break;
@@ -1795,7 +1823,7 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
* catching for all duplicate ACKs. */
IsReno(tp) || tp->snd_una != tp->high_seq) {
tp->undo_marker = 0;
- tcp_set_ca_state(tp, TCP_CA_Open);
+ tcp_set_ca_state(sk, TCP_CA_Open);
}
break;
@@ -1804,17 +1832,17 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
tcp_reset_reno_sack(tp);
if (tcp_try_undo_recovery(sk, tp))
return;
- tcp_complete_cwr(tp);
+ tcp_complete_cwr(sk);
break;
}
}
/* F. Process state. */
- switch (tp->ca_state) {
+ switch (icsk->icsk_ca_state) {
case TCP_CA_Recovery:
if (prior_snd_una == tp->snd_una) {
if (IsReno(tp) && is_dupack)
- tcp_add_reno_sack(tp);
+ tcp_add_reno_sack(sk);
} else {
int acked = prior_packets - tp->packets_out;
if (IsReno(tp))
@@ -1824,13 +1852,13 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
break;
case TCP_CA_Loss:
if (flag&FLAG_DATA_ACKED)
- tp->retransmits = 0;
+ icsk->icsk_retransmits = 0;
if (!tcp_try_undo_loss(sk, tp)) {
tcp_moderate_cwnd(tp);
tcp_xmit_retransmit_queue(sk);
return;
}
- if (tp->ca_state != TCP_CA_Open)
+ if (icsk->icsk_ca_state != TCP_CA_Open)
return;
/* Loss is undone; fall through to processing in Open state. */
default:
@@ -1838,10 +1866,10 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
if (tp->snd_una != prior_snd_una)
tcp_reset_reno_sack(tp);
if (is_dupack)
- tcp_add_reno_sack(tp);
+ tcp_add_reno_sack(sk);
}
- if (tp->ca_state == TCP_CA_Disorder)
+ if (icsk->icsk_ca_state == TCP_CA_Disorder)
tcp_try_undo_dsack(sk, tp);
if (!tcp_time_to_recover(sk, tp)) {
@@ -1861,30 +1889,28 @@ tcp_fastretrans_alert(struct sock *sk, u32 prior_snd_una,
tp->undo_marker = tp->snd_una;
tp->undo_retrans = tp->retrans_out;
- if (tp->ca_state < TCP_CA_CWR) {
+ if (icsk->icsk_ca_state < TCP_CA_CWR) {
if (!(flag&FLAG_ECE))
- tp->prior_ssthresh = tcp_current_ssthresh(tp);
- tp->snd_ssthresh = tp->ca_ops->ssthresh(tp);
+ tp->prior_ssthresh = tcp_current_ssthresh(sk);
+ tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
TCP_ECN_queue_cwr(tp);
}
tp->snd_cwnd_cnt = 0;
- tcp_set_ca_state(tp, TCP_CA_Recovery);
+ tcp_set_ca_state(sk, TCP_CA_Recovery);
}
if (is_dupack || tcp_head_timedout(sk, tp))
tcp_update_scoreboard(sk, tp);
- tcp_cwnd_down(tp);
+ tcp_cwnd_down(sk);
tcp_xmit_retransmit_queue(sk);
}
/* Read draft-ietf-tcplw-high-performance before mucking
* with this code. (Superceeds RFC1323)
*/
-static void tcp_ack_saw_tstamp(struct tcp_sock *tp, u32 *usrtt, int flag)
+static void tcp_ack_saw_tstamp(struct sock *sk, u32 *usrtt, int flag)
{
- __u32 seq_rtt;
-
/* RTTM Rule: A TSecr value received in a segment is used to
* update the averaged RTT measurement only if the segment
* acknowledges some new data, i.e., only if it advances the
@@ -1900,14 +1926,15 @@ static void tcp_ack_saw_tstamp(struct tcp_sock *tp, u32 *usrtt, int flag)
* answer arrives rto becomes 120 seconds! If at least one of segments
* in window is lost... Voila. --ANK (010210)
*/
- seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr;
- tcp_rtt_estimator(tp, seq_rtt, usrtt);
- tcp_set_rto(tp);
- tp->backoff = 0;
- tcp_bound_rto(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ const __u32 seq_rtt = tcp_time_stamp - tp->rx_opt.rcv_tsecr;
+ tcp_rtt_estimator(sk, seq_rtt, usrtt);
+ tcp_set_rto(sk);
+ inet_csk(sk)->icsk_backoff = 0;
+ tcp_bound_rto(sk);
}
-static void tcp_ack_no_tstamp(struct tcp_sock *tp, u32 seq_rtt, u32 *usrtt, int flag)
+static void tcp_ack_no_tstamp(struct sock *sk, u32 seq_rtt, u32 *usrtt, int flag)
{
/* We don't have a timestamp. Can only use
* packets that are not retransmitted to determine
@@ -1921,27 +1948,29 @@ static void tcp_ack_no_tstamp(struct tcp_sock *tp, u32 seq_rtt, u32 *usrtt, int
if (flag & FLAG_RETRANS_DATA_ACKED)
return;
- tcp_rtt_estimator(tp, seq_rtt, usrtt);
- tcp_set_rto(tp);
- tp->backoff = 0;
- tcp_bound_rto(tp);
+ tcp_rtt_estimator(sk, seq_rtt, usrtt);
+ tcp_set_rto(sk);
+ inet_csk(sk)->icsk_backoff = 0;
+ tcp_bound_rto(sk);
}
-static inline void tcp_ack_update_rtt(struct tcp_sock *tp,
- int flag, s32 seq_rtt, u32 *usrtt)
+static inline void tcp_ack_update_rtt(struct sock *sk, const int flag,
+ const s32 seq_rtt, u32 *usrtt)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
/* Note that peer MAY send zero echo. In this case it is ignored. (rfc1323) */
if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr)
- tcp_ack_saw_tstamp(tp, usrtt, flag);
+ tcp_ack_saw_tstamp(sk, usrtt, flag);
else if (seq_rtt >= 0)
- tcp_ack_no_tstamp(tp, seq_rtt, usrtt, flag);
+ tcp_ack_no_tstamp(sk, seq_rtt, usrtt, flag);
}
-static inline void tcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
+static inline void tcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
u32 in_flight, int good)
{
- tp->ca_ops->cong_avoid(tp, ack, rtt, in_flight, good);
- tp->snd_cwnd_stamp = tcp_time_stamp;
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ icsk->icsk_ca_ops->cong_avoid(sk, ack, rtt, in_flight, good);
+ tcp_sk(sk)->snd_cwnd_stamp = tcp_time_stamp;
}
/* Restart timer after forward progress on connection.
@@ -1951,9 +1980,9 @@ static inline void tcp_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
static inline void tcp_ack_packets_out(struct sock *sk, struct tcp_sock *tp)
{
if (!tp->packets_out) {
- tcp_clear_xmit_timer(sk, TCP_TIME_RETRANS);
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_RETRANS);
} else {
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, inet_csk(sk)->icsk_rto, TCP_RTO_MAX);
}
}
@@ -2068,9 +2097,13 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
seq_rtt = -1;
} else if (seq_rtt < 0)
seq_rtt = now - scb->when;
- if (seq_usrtt)
- *seq_usrtt = (usnow.tv_sec - skb->stamp.tv_sec) * 1000000
- + (usnow.tv_usec - skb->stamp.tv_usec);
+ if (seq_usrtt) {
+ struct timeval tv;
+
+ skb_get_timestamp(skb, &tv);
+ *seq_usrtt = (usnow.tv_sec - tv.tv_sec) * 1000000
+ + (usnow.tv_usec - tv.tv_usec);
+ }
if (sacked & TCPCB_SACKED_ACKED)
tp->sacked_out -= tcp_skb_pcount(skb);
@@ -2085,16 +2118,17 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
seq_rtt = now - scb->when;
tcp_dec_pcount_approx(&tp->fackets_out, skb);
tcp_packets_out_dec(tp, skb);
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &sk->sk_write_queue);
sk_stream_free_skb(sk, skb);
}
if (acked&FLAG_ACKED) {
- tcp_ack_update_rtt(tp, acked, seq_rtt, seq_usrtt);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ tcp_ack_update_rtt(sk, acked, seq_rtt, seq_usrtt);
tcp_ack_packets_out(sk, tp);
- if (tp->ca_ops->pkts_acked)
- tp->ca_ops->pkts_acked(tp, pkts_acked);
+ if (icsk->icsk_ca_ops->pkts_acked)
+ icsk->icsk_ca_ops->pkts_acked(sk, pkts_acked);
}
#if FASTRETRANS_DEBUG > 0
@@ -2102,19 +2136,20 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
BUG_TRAP((int)tp->lost_out >= 0);
BUG_TRAP((int)tp->retrans_out >= 0);
if (!tp->packets_out && tp->rx_opt.sack_ok) {
+ const struct inet_connection_sock *icsk = inet_csk(sk);
if (tp->lost_out) {
printk(KERN_DEBUG "Leak l=%u %d\n",
- tp->lost_out, tp->ca_state);
+ tp->lost_out, icsk->icsk_ca_state);
tp->lost_out = 0;
}
if (tp->sacked_out) {
printk(KERN_DEBUG "Leak s=%u %d\n",
- tp->sacked_out, tp->ca_state);
+ tp->sacked_out, icsk->icsk_ca_state);
tp->sacked_out = 0;
}
if (tp->retrans_out) {
printk(KERN_DEBUG "Leak r=%u %d\n",
- tp->retrans_out, tp->ca_state);
+ tp->retrans_out, icsk->icsk_ca_state);
tp->retrans_out = 0;
}
}
@@ -2125,40 +2160,43 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p, s32 *seq_usrtt
static void tcp_ack_probe(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
/* Was it a usable window open? */
if (!after(TCP_SKB_CB(sk->sk_send_head)->end_seq,
tp->snd_una + tp->snd_wnd)) {
- tp->backoff = 0;
- tcp_clear_xmit_timer(sk, TCP_TIME_PROBE0);
+ icsk->icsk_backoff = 0;
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_PROBE0);
/* Socket must be waked up by subsequent tcp_data_snd_check().
* This function is not for random using!
*/
} else {
- tcp_reset_xmit_timer(sk, TCP_TIME_PROBE0,
- min(tp->rto << tp->backoff, TCP_RTO_MAX));
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
+ min(icsk->icsk_rto << icsk->icsk_backoff, TCP_RTO_MAX),
+ TCP_RTO_MAX);
}
}
-static inline int tcp_ack_is_dubious(struct tcp_sock *tp, int flag)
+static inline int tcp_ack_is_dubious(const struct sock *sk, const int flag)
{
return (!(flag & FLAG_NOT_DUP) || (flag & FLAG_CA_ALERT) ||
- tp->ca_state != TCP_CA_Open);
+ inet_csk(sk)->icsk_ca_state != TCP_CA_Open);
}
-static inline int tcp_may_raise_cwnd(struct tcp_sock *tp, int flag)
+static inline int tcp_may_raise_cwnd(const struct sock *sk, const int flag)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return (!(flag & FLAG_ECE) || tp->snd_cwnd < tp->snd_ssthresh) &&
- !((1<<tp->ca_state)&(TCPF_CA_Recovery|TCPF_CA_CWR));
+ !((1 << inet_csk(sk)->icsk_ca_state) & (TCPF_CA_Recovery | TCPF_CA_CWR));
}
/* Check that window update is acceptable.
* The function assumes that snd_una<=ack<=snd_next.
*/
-static inline int tcp_may_update_window(struct tcp_sock *tp, u32 ack,
- u32 ack_seq, u32 nwin)
+static inline int tcp_may_update_window(const struct tcp_sock *tp, const u32 ack,
+ const u32 ack_seq, const u32 nwin)
{
return (after(ack, tp->snd_una) ||
after(ack_seq, tp->snd_wl1) ||
@@ -2241,6 +2279,7 @@ static void tcp_process_frto(struct sock *sk, u32 prior_snd_una)
/* This routine deals with incoming acks, but not outgoing ones. */
static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
u32 prior_snd_una = tp->snd_una;
u32 ack_seq = TCP_SKB_CB(skb)->seq;
@@ -2268,7 +2307,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
tp->snd_una = ack;
flag |= FLAG_WIN_UPDATE;
- tcp_ca_event(tp, CA_EVENT_FAST_ACK);
+ tcp_ca_event(sk, CA_EVENT_FAST_ACK);
NET_INC_STATS_BH(LINUX_MIB_TCPHPACKS);
} else {
@@ -2285,7 +2324,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
if (TCP_ECN_rcv_ecn_echo(tp, skb->h.th))
flag |= FLAG_ECE;
- tcp_ca_event(tp, CA_EVENT_SLOW_ACK);
+ tcp_ca_event(sk, CA_EVENT_SLOW_ACK);
}
/* We passed data and got it acked, remove any soft error
@@ -2301,19 +2340,19 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
/* See if we can take anything off of the retransmit queue. */
flag |= tcp_clean_rtx_queue(sk, &seq_rtt,
- tp->ca_ops->rtt_sample ? &seq_usrtt : NULL);
+ icsk->icsk_ca_ops->rtt_sample ? &seq_usrtt : NULL);
if (tp->frto_counter)
tcp_process_frto(sk, prior_snd_una);
- if (tcp_ack_is_dubious(tp, flag)) {
+ if (tcp_ack_is_dubious(sk, flag)) {
/* Advanve CWND, if state allows this. */
- if ((flag & FLAG_DATA_ACKED) && tcp_may_raise_cwnd(tp, flag))
- tcp_cong_avoid(tp, ack, seq_rtt, prior_in_flight, 0);
+ if ((flag & FLAG_DATA_ACKED) && tcp_may_raise_cwnd(sk, flag))
+ tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 0);
tcp_fastretrans_alert(sk, prior_snd_una, prior_packets, flag);
} else {
if ((flag & FLAG_DATA_ACKED))
- tcp_cong_avoid(tp, ack, seq_rtt, prior_in_flight, 1);
+ tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 1);
}
if ((flag & FLAG_FORWARD_PROGRESS) || !(flag&FLAG_NOT_DUP))
@@ -2322,7 +2361,7 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag)
return 1;
no_queue:
- tp->probes_out = 0;
+ icsk->icsk_probes_out = 0;
/* If this ack opens up a zero window, clear backoff. It was
* being used to time the probes, and is probably far higher than
@@ -2500,8 +2539,9 @@ static inline void tcp_replace_ts_recent(struct tcp_sock *tp, u32 seq)
* up to bandwidth of 18Gigabit/sec. 8) ]
*/
-static int tcp_disordered_ack(struct tcp_sock *tp, struct sk_buff *skb)
+static int tcp_disordered_ack(const struct sock *sk, const struct sk_buff *skb)
{
+ struct tcp_sock *tp = tcp_sk(sk);
struct tcphdr *th = skb->h.th;
u32 seq = TCP_SKB_CB(skb)->seq;
u32 ack = TCP_SKB_CB(skb)->ack_seq;
@@ -2516,14 +2556,15 @@ static int tcp_disordered_ack(struct tcp_sock *tp, struct sk_buff *skb)
!tcp_may_update_window(tp, ack, seq, ntohs(th->window) << tp->rx_opt.snd_wscale) &&
/* 4. ... and sits in replay window. */
- (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (tp->rto*1024)/HZ);
+ (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (inet_csk(sk)->icsk_rto * 1024) / HZ);
}
-static inline int tcp_paws_discard(struct tcp_sock *tp, struct sk_buff *skb)
+static inline int tcp_paws_discard(const struct sock *sk, const struct sk_buff *skb)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return ((s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) > TCP_PAWS_WINDOW &&
xtime.tv_sec < tp->rx_opt.ts_recent_stamp + TCP_PAWS_24DAYS &&
- !tcp_disordered_ack(tp, skb));
+ !tcp_disordered_ack(sk, skb));
}
/* Check segment sequence number for validity.
@@ -2586,7 +2627,7 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th)
{
struct tcp_sock *tp = tcp_sk(sk);
- tcp_schedule_ack(tp);
+ inet_csk_schedule_ack(sk);
sk->sk_shutdown |= RCV_SHUTDOWN;
sock_set_flag(sk, SOCK_DONE);
@@ -2596,7 +2637,7 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th)
case TCP_ESTABLISHED:
/* Move to CLOSE_WAIT */
tcp_set_state(sk, TCP_CLOSE_WAIT);
- tp->ack.pingpong = 1;
+ inet_csk(sk)->icsk_ack.pingpong = 1;
break;
case TCP_CLOSE_WAIT:
@@ -2694,7 +2735,7 @@ static void tcp_send_dupack(struct sock *sk, struct sk_buff *skb)
if (TCP_SKB_CB(skb)->end_seq != TCP_SKB_CB(skb)->seq &&
before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) {
NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKLOST);
- tcp_enter_quickack_mode(tp);
+ tcp_enter_quickack_mode(sk);
if (tp->rx_opt.sack_ok && sysctl_tcp_dsack) {
u32 end_seq = TCP_SKB_CB(skb)->end_seq;
@@ -2853,7 +2894,7 @@ static void tcp_ofo_queue(struct sock *sk)
if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) {
SOCK_DEBUG(sk, "ofo packet was already received \n");
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &tp->out_of_order_queue);
__kfree_skb(skb);
continue;
}
@@ -2861,7 +2902,7 @@ static void tcp_ofo_queue(struct sock *sk)
tp->rcv_nxt, TCP_SKB_CB(skb)->seq,
TCP_SKB_CB(skb)->end_seq);
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &tp->out_of_order_queue);
__skb_queue_tail(&sk->sk_receive_queue, skb);
tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
if(skb->h.th->fin)
@@ -2942,7 +2983,7 @@ queue_and_out:
* gap in queue is filled.
*/
if (skb_queue_empty(&tp->out_of_order_queue))
- tp->ack.pingpong = 0;
+ inet_csk(sk)->icsk_ack.pingpong = 0;
}
if (tp->rx_opt.num_sacks)
@@ -2963,8 +3004,8 @@ queue_and_out:
tcp_dsack_set(tp, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq);
out_of_window:
- tcp_enter_quickack_mode(tp);
- tcp_schedule_ack(tp);
+ tcp_enter_quickack_mode(sk);
+ inet_csk_schedule_ack(sk);
drop:
__kfree_skb(skb);
return;
@@ -2974,7 +3015,7 @@ drop:
if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp)))
goto out_of_window;
- tcp_enter_quickack_mode(tp);
+ tcp_enter_quickack_mode(sk);
if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) {
/* Partial packet, seq < rcv_next < end_seq */
@@ -3003,7 +3044,7 @@ drop:
/* Disable header prediction. */
tp->pred_flags = 0;
- tcp_schedule_ack(tp);
+ inet_csk_schedule_ack(sk);
SOCK_DEBUG(sk, "out of order segment: rcv_next %X seq %X - %X\n",
tp->rcv_nxt, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq);
@@ -3027,7 +3068,7 @@ drop:
u32 end_seq = TCP_SKB_CB(skb)->end_seq;
if (seq == TCP_SKB_CB(skb1)->end_seq) {
- __skb_append(skb1, skb);
+ __skb_append(skb1, skb, &tp->out_of_order_queue);
if (!tp->rx_opt.num_sacks ||
tp->selective_acks[0].end_seq != seq)
@@ -3071,7 +3112,7 @@ drop:
tcp_dsack_extend(tp, TCP_SKB_CB(skb1)->seq, end_seq);
break;
}
- __skb_unlink(skb1, skb1->list);
+ __skb_unlink(skb1, &tp->out_of_order_queue);
tcp_dsack_extend(tp, TCP_SKB_CB(skb1)->seq, TCP_SKB_CB(skb1)->end_seq);
__kfree_skb(skb1);
}
@@ -3088,8 +3129,9 @@ add_sack:
* simplifies code)
*/
static void
-tcp_collapse(struct sock *sk, struct sk_buff *head,
- struct sk_buff *tail, u32 start, u32 end)
+tcp_collapse(struct sock *sk, struct sk_buff_head *list,
+ struct sk_buff *head, struct sk_buff *tail,
+ u32 start, u32 end)
{
struct sk_buff *skb;
@@ -3099,7 +3141,7 @@ tcp_collapse(struct sock *sk, struct sk_buff *head,
/* No new bits? It is possible on ofo queue. */
if (!before(start, TCP_SKB_CB(skb)->end_seq)) {
struct sk_buff *next = skb->next;
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, list);
__kfree_skb(skb);
NET_INC_STATS_BH(LINUX_MIB_TCPRCVCOLLAPSED);
skb = next;
@@ -3145,7 +3187,7 @@ tcp_collapse(struct sock *sk, struct sk_buff *head,
nskb->mac.raw = nskb->head + (skb->mac.raw-skb->head);
memcpy(nskb->cb, skb->cb, sizeof(skb->cb));
TCP_SKB_CB(nskb)->seq = TCP_SKB_CB(nskb)->end_seq = start;
- __skb_insert(nskb, skb->prev, skb, skb->list);
+ __skb_insert(nskb, skb->prev, skb, list);
sk_stream_set_owner_r(nskb, sk);
/* Copy data, releasing collapsed skbs. */
@@ -3164,7 +3206,7 @@ tcp_collapse(struct sock *sk, struct sk_buff *head,
}
if (!before(start, TCP_SKB_CB(skb)->end_seq)) {
struct sk_buff *next = skb->next;
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, list);
__kfree_skb(skb);
NET_INC_STATS_BH(LINUX_MIB_TCPRCVCOLLAPSED);
skb = next;
@@ -3200,7 +3242,8 @@ static void tcp_collapse_ofo_queue(struct sock *sk)
if (skb == (struct sk_buff *)&tp->out_of_order_queue ||
after(TCP_SKB_CB(skb)->seq, end) ||
before(TCP_SKB_CB(skb)->end_seq, start)) {
- tcp_collapse(sk, head, skb, start, end);
+ tcp_collapse(sk, &tp->out_of_order_queue,
+ head, skb, start, end);
head = skb;
if (skb == (struct sk_buff *)&tp->out_of_order_queue)
break;
@@ -3237,7 +3280,8 @@ static int tcp_prune_queue(struct sock *sk)
tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss);
tcp_collapse_ofo_queue(sk);
- tcp_collapse(sk, sk->sk_receive_queue.next,
+ tcp_collapse(sk, &sk->sk_receive_queue,
+ sk->sk_receive_queue.next,
(struct sk_buff*)&sk->sk_receive_queue,
tp->copied_seq, tp->rcv_nxt);
sk_stream_mem_reclaim(sk);
@@ -3286,12 +3330,12 @@ void tcp_cwnd_application_limited(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
- if (tp->ca_state == TCP_CA_Open &&
+ if (inet_csk(sk)->icsk_ca_state == TCP_CA_Open &&
sk->sk_socket && !test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
/* Limited by application or receiver window. */
u32 win_used = max(tp->snd_cwnd_used, 2U);
if (win_used < tp->snd_cwnd) {
- tp->snd_ssthresh = tcp_current_ssthresh(tp);
+ tp->snd_ssthresh = tcp_current_ssthresh(sk);
tp->snd_cwnd = (tp->snd_cwnd + win_used) >> 1;
}
tp->snd_cwnd_used = 0;
@@ -3370,13 +3414,13 @@ static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible)
struct tcp_sock *tp = tcp_sk(sk);
/* More than one full frame received... */
- if (((tp->rcv_nxt - tp->rcv_wup) > tp->ack.rcv_mss
+ if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss
/* ... and right edge of window advances far enough.
* (tcp_recvmsg() will send ACK otherwise). Or...
*/
&& __tcp_select_window(sk) >= tp->rcv_wnd) ||
/* We ACK each frame or... */
- tcp_in_quickack_mode(tp) ||
+ tcp_in_quickack_mode(sk) ||
/* We have out of order data. */
(ofo_possible &&
skb_peek(&tp->out_of_order_queue))) {
@@ -3390,8 +3434,7 @@ static void __tcp_ack_snd_check(struct sock *sk, int ofo_possible)
static __inline__ void tcp_ack_snd_check(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
- if (!tcp_ack_scheduled(tp)) {
+ if (!inet_csk_ack_scheduled(sk)) {
/* We sent a data segment already. */
return;
}
@@ -3462,7 +3505,7 @@ static void tcp_check_urg(struct sock * sk, struct tcphdr * th)
struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
tp->copied_seq++;
if (skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq)) {
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &sk->sk_receive_queue);
__kfree_skb(skb);
}
}
@@ -3645,7 +3688,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
tp->rcv_nxt == tp->rcv_wup)
tcp_store_ts_recent(tp);
- tcp_rcv_rtt_measure_ts(tp, skb);
+ tcp_rcv_rtt_measure_ts(sk, skb);
/* We know that such packets are checksummed
* on entry.
@@ -3678,7 +3721,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
tp->rcv_nxt == tp->rcv_wup)
tcp_store_ts_recent(tp);
- tcp_rcv_rtt_measure_ts(tp, skb);
+ tcp_rcv_rtt_measure_ts(sk, skb);
__skb_pull(skb, tcp_header_len);
tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
@@ -3699,7 +3742,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
tp->rcv_nxt == tp->rcv_wup)
tcp_store_ts_recent(tp);
- tcp_rcv_rtt_measure_ts(tp, skb);
+ tcp_rcv_rtt_measure_ts(sk, skb);
if ((int)skb->truesize > sk->sk_forward_alloc)
goto step5;
@@ -3719,7 +3762,7 @@ int tcp_rcv_established(struct sock *sk, struct sk_buff *skb,
/* Well, only one small jumplet in fast path... */
tcp_ack(sk, skb, FLAG_DATA);
tcp_data_snd_check(sk, tp);
- if (!tcp_ack_scheduled(tp))
+ if (!inet_csk_ack_scheduled(sk))
goto no_ack;
}
@@ -3741,7 +3784,7 @@ slow_path:
* RFC1323: H1. Apply PAWS check first.
*/
if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp &&
- tcp_paws_discard(tp, skb)) {
+ tcp_paws_discard(sk, skb)) {
if (!th->rst) {
NET_INC_STATS_BH(LINUX_MIB_PAWSESTABREJECTED);
tcp_send_dupack(sk, skb);
@@ -3788,7 +3831,7 @@ step5:
if(th->ack)
tcp_ack(sk, skb, FLAG_SLOWPATH);
- tcp_rcv_rtt_measure_ts(tp, skb);
+ tcp_rcv_rtt_measure_ts(sk, skb);
/* Process urgent data. */
tcp_urg(sk, skb, th);
@@ -3817,6 +3860,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
tcp_parse_options(skb, &tp->rx_opt, 0);
if (th->ack) {
+ struct inet_connection_sock *icsk;
/* rfc793:
* "If the state is SYN-SENT then
* first check the ACK bit
@@ -3920,7 +3964,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
tcp_init_metrics(sk);
- tcp_init_congestion_control(tp);
+ tcp_init_congestion_control(sk);
/* Prevent spurious tcp_cwnd_restart() on first data
* packet.
@@ -3930,7 +3974,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
tcp_init_buffer_space(sk);
if (sock_flag(sk, SOCK_KEEPOPEN))
- tcp_reset_keepalive_timer(sk, keepalive_time_when(tp));
+ inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tp));
if (!tp->rx_opt.snd_wscale)
__tcp_fast_path_on(tp, tp->snd_wnd);
@@ -3942,7 +3986,11 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
sk_wake_async(sk, 0, POLL_OUT);
}
- if (sk->sk_write_pending || tp->defer_accept || tp->ack.pingpong) {
+ icsk = inet_csk(sk);
+
+ if (sk->sk_write_pending ||
+ icsk->icsk_accept_queue.rskq_defer_accept ||
+ icsk->icsk_ack.pingpong) {
/* Save one ACK. Data will be ready after
* several ticks, if write_pending is set.
*
@@ -3950,12 +3998,13 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
* look so _wonderfully_ clever, that I was not able
* to stand against the temptation 8) --ANK
*/
- tcp_schedule_ack(tp);
- tp->ack.lrcvtime = tcp_time_stamp;
- tp->ack.ato = TCP_ATO_MIN;
- tcp_incr_quickack(tp);
- tcp_enter_quickack_mode(tp);
- tcp_reset_xmit_timer(sk, TCP_TIME_DACK, TCP_DELACK_MAX);
+ inet_csk_schedule_ack(sk);
+ icsk->icsk_ack.lrcvtime = tcp_time_stamp;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
+ tcp_incr_quickack(sk);
+ tcp_enter_quickack_mode(sk);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ TCP_DELACK_MAX, TCP_RTO_MAX);
discard:
__kfree_skb(skb);
@@ -4111,7 +4160,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
}
if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp &&
- tcp_paws_discard(tp, skb)) {
+ tcp_paws_discard(sk, skb)) {
if (!th->rst) {
NET_INC_STATS_BH(LINUX_MIB_PAWSESTABREJECTED);
tcp_send_dupack(sk, skb);
@@ -4180,7 +4229,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
*/
if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr &&
!tp->srtt)
- tcp_ack_saw_tstamp(tp, 0, 0);
+ tcp_ack_saw_tstamp(sk, NULL, 0);
if (tp->rx_opt.tstamp_ok)
tp->advmss -= TCPOLEN_TSTAMP_ALIGNED;
@@ -4192,7 +4241,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
tcp_init_metrics(sk);
- tcp_init_congestion_control(tp);
+ tcp_init_congestion_control(sk);
/* Prevent spurious tcp_cwnd_restart() on
* first data packet.
@@ -4227,9 +4276,9 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
return 1;
}
- tmo = tcp_fin_time(tp);
+ tmo = tcp_fin_time(sk);
if (tmo > TCP_TIMEWAIT_LEN) {
- tcp_reset_keepalive_timer(sk, tmo - TCP_TIMEWAIT_LEN);
+ inet_csk_reset_keepalive_timer(sk, tmo - TCP_TIMEWAIT_LEN);
} else if (th->fin || sock_owned_by_user(sk)) {
/* Bad case. We could lose such FIN otherwise.
* It is not a big problem, but it looks confusing
@@ -4237,7 +4286,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
* if it spins in bh_lock_sock(), but it is really
* marginal case.
*/
- tcp_reset_keepalive_timer(sk, tmo);
+ inet_csk_reset_keepalive_timer(sk, tmo);
} else {
tcp_time_wait(sk, TCP_FIN_WAIT2, tmo);
goto discard;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 67c670886c1f..13dfb391cdf1 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -64,7 +64,9 @@
#include <linux/times.h>
#include <net/icmp.h>
+#include <net/inet_hashtables.h>
#include <net/tcp.h>
+#include <net/transp_v6.h>
#include <net/ipv6.h>
#include <net/inet_common.h>
#include <net/xfrm.h>
@@ -75,7 +77,6 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-extern int sysctl_ip_dynaddr;
int sysctl_tcp_tw_reuse;
int sysctl_tcp_low_latency;
@@ -88,463 +89,29 @@ static struct socket *tcp_socket;
void tcp_v4_send_check(struct sock *sk, struct tcphdr *th, int len,
struct sk_buff *skb);
-struct tcp_hashinfo __cacheline_aligned tcp_hashinfo = {
- .__tcp_lhash_lock = RW_LOCK_UNLOCKED,
- .__tcp_lhash_users = ATOMIC_INIT(0),
- .__tcp_lhash_wait
- = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.__tcp_lhash_wait),
- .__tcp_portalloc_lock = SPIN_LOCK_UNLOCKED
+struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
+ .lhash_lock = RW_LOCK_UNLOCKED,
+ .lhash_users = ATOMIC_INIT(0),
+ .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
+ .portalloc_lock = SPIN_LOCK_UNLOCKED,
+ .port_rover = 1024 - 1,
};
-/*
- * This array holds the first and last local port number.
- * For high-usage systems, use sysctl to change this to
- * 32768-61000
- */
-int sysctl_local_port_range[2] = { 1024, 4999 };
-int tcp_port_rover = 1024 - 1;
-
-static __inline__ int tcp_hashfn(__u32 laddr, __u16 lport,
- __u32 faddr, __u16 fport)
-{
- int h = (laddr ^ lport) ^ (faddr ^ fport);
- h ^= h >> 16;
- h ^= h >> 8;
- return h & (tcp_ehash_size - 1);
-}
-
-static __inline__ int tcp_sk_hashfn(struct sock *sk)
-{
- struct inet_sock *inet = inet_sk(sk);
- __u32 laddr = inet->rcv_saddr;
- __u16 lport = inet->num;
- __u32 faddr = inet->daddr;
- __u16 fport = inet->dport;
-
- return tcp_hashfn(laddr, lport, faddr, fport);
-}
-
-/* Allocate and initialize a new TCP local port bind bucket.
- * The bindhash mutex for snum's hash chain must be held here.
- */
-struct tcp_bind_bucket *tcp_bucket_create(struct tcp_bind_hashbucket *head,
- unsigned short snum)
-{
- struct tcp_bind_bucket *tb = kmem_cache_alloc(tcp_bucket_cachep,
- SLAB_ATOMIC);
- if (tb) {
- tb->port = snum;
- tb->fastreuse = 0;
- INIT_HLIST_HEAD(&tb->owners);
- hlist_add_head(&tb->node, &head->chain);
- }
- return tb;
-}
-
-/* Caller must hold hashbucket lock for this tb with local BH disabled */
-void tcp_bucket_destroy(struct tcp_bind_bucket *tb)
-{
- if (hlist_empty(&tb->owners)) {
- __hlist_del(&tb->node);
- kmem_cache_free(tcp_bucket_cachep, tb);
- }
-}
-
-/* Caller must disable local BH processing. */
-static __inline__ void __tcp_inherit_port(struct sock *sk, struct sock *child)
-{
- struct tcp_bind_hashbucket *head =
- &tcp_bhash[tcp_bhashfn(inet_sk(child)->num)];
- struct tcp_bind_bucket *tb;
-
- spin_lock(&head->lock);
- tb = tcp_sk(sk)->bind_hash;
- sk_add_bind_node(child, &tb->owners);
- tcp_sk(child)->bind_hash = tb;
- spin_unlock(&head->lock);
-}
-
-inline void tcp_inherit_port(struct sock *sk, struct sock *child)
-{
- local_bh_disable();
- __tcp_inherit_port(sk, child);
- local_bh_enable();
-}
-
-void tcp_bind_hash(struct sock *sk, struct tcp_bind_bucket *tb,
- unsigned short snum)
-{
- inet_sk(sk)->num = snum;
- sk_add_bind_node(sk, &tb->owners);
- tcp_sk(sk)->bind_hash = tb;
-}
-
-static inline int tcp_bind_conflict(struct sock *sk, struct tcp_bind_bucket *tb)
-{
- const u32 sk_rcv_saddr = tcp_v4_rcv_saddr(sk);
- struct sock *sk2;
- struct hlist_node *node;
- int reuse = sk->sk_reuse;
-
- sk_for_each_bound(sk2, node, &tb->owners) {
- if (sk != sk2 &&
- !tcp_v6_ipv6only(sk2) &&
- (!sk->sk_bound_dev_if ||
- !sk2->sk_bound_dev_if ||
- sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) {
- if (!reuse || !sk2->sk_reuse ||
- sk2->sk_state == TCP_LISTEN) {
- const u32 sk2_rcv_saddr = tcp_v4_rcv_saddr(sk2);
- if (!sk2_rcv_saddr || !sk_rcv_saddr ||
- sk2_rcv_saddr == sk_rcv_saddr)
- break;
- }
- }
- }
- return node != NULL;
-}
-
-/* Obtain a reference to a local port for the given sock,
- * if snum is zero it means select any available local port.
- */
static int tcp_v4_get_port(struct sock *sk, unsigned short snum)
{
- struct tcp_bind_hashbucket *head;
- struct hlist_node *node;
- struct tcp_bind_bucket *tb;
- int ret;
-
- local_bh_disable();
- if (!snum) {
- int low = sysctl_local_port_range[0];
- int high = sysctl_local_port_range[1];
- int remaining = (high - low) + 1;
- int rover;
-
- spin_lock(&tcp_portalloc_lock);
- if (tcp_port_rover < low)
- rover = low;
- else
- rover = tcp_port_rover;
- do {
- rover++;
- if (rover > high)
- rover = low;
- head = &tcp_bhash[tcp_bhashfn(rover)];
- spin_lock(&head->lock);
- tb_for_each(tb, node, &head->chain)
- if (tb->port == rover)
- goto next;
- break;
- next:
- spin_unlock(&head->lock);
- } while (--remaining > 0);
- tcp_port_rover = rover;
- spin_unlock(&tcp_portalloc_lock);
-
- /* Exhausted local port range during search? It is not
- * possible for us to be holding one of the bind hash
- * locks if this test triggers, because if 'remaining'
- * drops to zero, we broke out of the do/while loop at
- * the top level, not from the 'break;' statement.
- */
- ret = 1;
- if (unlikely(remaining <= 0))
- goto fail;
-
- /* OK, here is the one we will use. HEAD is
- * non-NULL and we hold it's mutex.
- */
- snum = rover;
- } else {
- head = &tcp_bhash[tcp_bhashfn(snum)];
- spin_lock(&head->lock);
- tb_for_each(tb, node, &head->chain)
- if (tb->port == snum)
- goto tb_found;
- }
- tb = NULL;
- goto tb_not_found;
-tb_found:
- if (!hlist_empty(&tb->owners)) {
- if (sk->sk_reuse > 1)
- goto success;
- if (tb->fastreuse > 0 &&
- sk->sk_reuse && sk->sk_state != TCP_LISTEN) {
- goto success;
- } else {
- ret = 1;
- if (tcp_bind_conflict(sk, tb))
- goto fail_unlock;
- }
- }
-tb_not_found:
- ret = 1;
- if (!tb && (tb = tcp_bucket_create(head, snum)) == NULL)
- goto fail_unlock;
- if (hlist_empty(&tb->owners)) {
- if (sk->sk_reuse && sk->sk_state != TCP_LISTEN)
- tb->fastreuse = 1;
- else
- tb->fastreuse = 0;
- } else if (tb->fastreuse &&
- (!sk->sk_reuse || sk->sk_state == TCP_LISTEN))
- tb->fastreuse = 0;
-success:
- if (!tcp_sk(sk)->bind_hash)
- tcp_bind_hash(sk, tb, snum);
- BUG_TRAP(tcp_sk(sk)->bind_hash == tb);
- ret = 0;
-
-fail_unlock:
- spin_unlock(&head->lock);
-fail:
- local_bh_enable();
- return ret;
-}
-
-/* Get rid of any references to a local port held by the
- * given sock.
- */
-static void __tcp_put_port(struct sock *sk)
-{
- struct inet_sock *inet = inet_sk(sk);
- struct tcp_bind_hashbucket *head = &tcp_bhash[tcp_bhashfn(inet->num)];
- struct tcp_bind_bucket *tb;
-
- spin_lock(&head->lock);
- tb = tcp_sk(sk)->bind_hash;
- __sk_del_bind_node(sk);
- tcp_sk(sk)->bind_hash = NULL;
- inet->num = 0;
- tcp_bucket_destroy(tb);
- spin_unlock(&head->lock);
-}
-
-void tcp_put_port(struct sock *sk)
-{
- local_bh_disable();
- __tcp_put_port(sk);
- local_bh_enable();
-}
-
-/* This lock without WQ_FLAG_EXCLUSIVE is good on UP and it can be very bad on SMP.
- * Look, when several writers sleep and reader wakes them up, all but one
- * immediately hit write lock and grab all the cpus. Exclusive sleep solves
- * this, _but_ remember, it adds useless work on UP machines (wake up each
- * exclusive lock release). It should be ifdefed really.
- */
-
-void tcp_listen_wlock(void)
-{
- write_lock(&tcp_lhash_lock);
-
- if (atomic_read(&tcp_lhash_users)) {
- DEFINE_WAIT(wait);
-
- for (;;) {
- prepare_to_wait_exclusive(&tcp_lhash_wait,
- &wait, TASK_UNINTERRUPTIBLE);
- if (!atomic_read(&tcp_lhash_users))
- break;
- write_unlock_bh(&tcp_lhash_lock);
- schedule();
- write_lock_bh(&tcp_lhash_lock);
- }
-
- finish_wait(&tcp_lhash_wait, &wait);
- }
-}
-
-static __inline__ void __tcp_v4_hash(struct sock *sk, const int listen_possible)
-{
- struct hlist_head *list;
- rwlock_t *lock;
-
- BUG_TRAP(sk_unhashed(sk));
- if (listen_possible && sk->sk_state == TCP_LISTEN) {
- list = &tcp_listening_hash[tcp_sk_listen_hashfn(sk)];
- lock = &tcp_lhash_lock;
- tcp_listen_wlock();
- } else {
- list = &tcp_ehash[(sk->sk_hashent = tcp_sk_hashfn(sk))].chain;
- lock = &tcp_ehash[sk->sk_hashent].lock;
- write_lock(lock);
- }
- __sk_add_node(sk, list);
- sock_prot_inc_use(sk->sk_prot);
- write_unlock(lock);
- if (listen_possible && sk->sk_state == TCP_LISTEN)
- wake_up(&tcp_lhash_wait);
+ return inet_csk_get_port(&tcp_hashinfo, sk, snum);
}
static void tcp_v4_hash(struct sock *sk)
{
- if (sk->sk_state != TCP_CLOSE) {
- local_bh_disable();
- __tcp_v4_hash(sk, 1);
- local_bh_enable();
- }
+ inet_hash(&tcp_hashinfo, sk);
}
void tcp_unhash(struct sock *sk)
{
- rwlock_t *lock;
-
- if (sk_unhashed(sk))
- goto ende;
-
- if (sk->sk_state == TCP_LISTEN) {
- local_bh_disable();
- tcp_listen_wlock();
- lock = &tcp_lhash_lock;
- } else {
- struct tcp_ehash_bucket *head = &tcp_ehash[sk->sk_hashent];
- lock = &head->lock;
- write_lock_bh(&head->lock);
- }
-
- if (__sk_del_node_init(sk))
- sock_prot_dec_use(sk->sk_prot);
- write_unlock_bh(lock);
-
- ende:
- if (sk->sk_state == TCP_LISTEN)
- wake_up(&tcp_lhash_wait);
-}
-
-/* Don't inline this cruft. Here are some nice properties to
- * exploit here. The BSD API does not allow a listening TCP
- * to specify the remote port nor the remote address for the
- * connection. So always assume those are both wildcarded
- * during the search since they can never be otherwise.
- */
-static struct sock *__tcp_v4_lookup_listener(struct hlist_head *head, u32 daddr,
- unsigned short hnum, int dif)
-{
- struct sock *result = NULL, *sk;
- struct hlist_node *node;
- int score, hiscore;
-
- hiscore=-1;
- sk_for_each(sk, node, head) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (inet->num == hnum && !ipv6_only_sock(sk)) {
- __u32 rcv_saddr = inet->rcv_saddr;
-
- score = (sk->sk_family == PF_INET ? 1 : 0);
- if (rcv_saddr) {
- if (rcv_saddr != daddr)
- continue;
- score+=2;
- }
- if (sk->sk_bound_dev_if) {
- if (sk->sk_bound_dev_if != dif)
- continue;
- score+=2;
- }
- if (score == 5)
- return sk;
- if (score > hiscore) {
- hiscore = score;
- result = sk;
- }
- }
- }
- return result;
-}
-
-/* Optimize the common listener case. */
-static inline struct sock *tcp_v4_lookup_listener(u32 daddr,
- unsigned short hnum, int dif)
-{
- struct sock *sk = NULL;
- struct hlist_head *head;
-
- read_lock(&tcp_lhash_lock);
- head = &tcp_listening_hash[tcp_lhashfn(hnum)];
- if (!hlist_empty(head)) {
- struct inet_sock *inet = inet_sk((sk = __sk_head(head)));
-
- if (inet->num == hnum && !sk->sk_node.next &&
- (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
- (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
- !sk->sk_bound_dev_if)
- goto sherry_cache;
- sk = __tcp_v4_lookup_listener(head, daddr, hnum, dif);
- }
- if (sk) {
-sherry_cache:
- sock_hold(sk);
- }
- read_unlock(&tcp_lhash_lock);
- return sk;
+ inet_unhash(&tcp_hashinfo, sk);
}
-/* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
- * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
- *
- * Local BH must be disabled here.
- */
-
-static inline struct sock *__tcp_v4_lookup_established(u32 saddr, u16 sport,
- u32 daddr, u16 hnum,
- int dif)
-{
- struct tcp_ehash_bucket *head;
- TCP_V4_ADDR_COOKIE(acookie, saddr, daddr)
- __u32 ports = TCP_COMBINED_PORTS(sport, hnum);
- struct sock *sk;
- struct hlist_node *node;
- /* Optimize here for direct hit, only listening connections can
- * have wildcards anyways.
- */
- int hash = tcp_hashfn(daddr, hnum, saddr, sport);
- head = &tcp_ehash[hash];
- read_lock(&head->lock);
- sk_for_each(sk, node, &head->chain) {
- if (TCP_IPV4_MATCH(sk, acookie, saddr, daddr, ports, dif))
- goto hit; /* You sunk my battleship! */
- }
-
- /* Must check for a TIME_WAIT'er before going to listener hash. */
- sk_for_each(sk, node, &(head + tcp_ehash_size)->chain) {
- if (TCP_IPV4_TW_MATCH(sk, acookie, saddr, daddr, ports, dif))
- goto hit;
- }
- sk = NULL;
-out:
- read_unlock(&head->lock);
- return sk;
-hit:
- sock_hold(sk);
- goto out;
-}
-
-static inline struct sock *__tcp_v4_lookup(u32 saddr, u16 sport,
- u32 daddr, u16 hnum, int dif)
-{
- struct sock *sk = __tcp_v4_lookup_established(saddr, sport,
- daddr, hnum, dif);
-
- return sk ? : tcp_v4_lookup_listener(daddr, hnum, dif);
-}
-
-inline struct sock *tcp_v4_lookup(u32 saddr, u16 sport, u32 daddr,
- u16 dport, int dif)
-{
- struct sock *sk;
-
- local_bh_disable();
- sk = __tcp_v4_lookup(saddr, sport, daddr, ntohs(dport), dif);
- local_bh_enable();
-
- return sk;
-}
-
-EXPORT_SYMBOL_GPL(tcp_v4_lookup);
-
static inline __u32 tcp_v4_init_sequence(struct sock *sk, struct sk_buff *skb)
{
return secure_tcp_sequence_number(skb->nh.iph->daddr,
@@ -555,27 +122,28 @@ static inline __u32 tcp_v4_init_sequence(struct sock *sk, struct sk_buff *skb)
/* called with local bh disabled */
static int __tcp_v4_check_established(struct sock *sk, __u16 lport,
- struct tcp_tw_bucket **twp)
+ struct inet_timewait_sock **twp)
{
struct inet_sock *inet = inet_sk(sk);
u32 daddr = inet->rcv_saddr;
u32 saddr = inet->daddr;
int dif = sk->sk_bound_dev_if;
- TCP_V4_ADDR_COOKIE(acookie, saddr, daddr)
- __u32 ports = TCP_COMBINED_PORTS(inet->dport, lport);
- int hash = tcp_hashfn(daddr, lport, saddr, inet->dport);
- struct tcp_ehash_bucket *head = &tcp_ehash[hash];
+ INET_ADDR_COOKIE(acookie, saddr, daddr)
+ const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
+ const int hash = inet_ehashfn(daddr, lport, saddr, inet->dport, tcp_hashinfo.ehash_size);
+ struct inet_ehash_bucket *head = &tcp_hashinfo.ehash[hash];
struct sock *sk2;
- struct hlist_node *node;
- struct tcp_tw_bucket *tw;
+ const struct hlist_node *node;
+ struct inet_timewait_sock *tw;
write_lock(&head->lock);
/* Check TIME-WAIT sockets first. */
- sk_for_each(sk2, node, &(head + tcp_ehash_size)->chain) {
- tw = (struct tcp_tw_bucket *)sk2;
+ sk_for_each(sk2, node, &(head + tcp_hashinfo.ehash_size)->chain) {
+ tw = inet_twsk(sk2);
- if (TCP_IPV4_TW_MATCH(sk2, acookie, saddr, daddr, ports, dif)) {
+ if (INET_TW_MATCH(sk2, acookie, saddr, daddr, ports, dif)) {
+ const struct tcp_timewait_sock *tcptw = tcp_twsk(sk2);
struct tcp_sock *tp = tcp_sk(sk);
/* With PAWS, it is safe from the viewpoint
@@ -592,15 +160,15 @@ static int __tcp_v4_check_established(struct sock *sk, __u16 lport,
fall back to VJ's scheme and use initial
timestamp retrieved from peer table.
*/
- if (tw->tw_ts_recent_stamp &&
+ if (tcptw->tw_ts_recent_stamp &&
(!twp || (sysctl_tcp_tw_reuse &&
xtime.tv_sec -
- tw->tw_ts_recent_stamp > 1))) {
- if ((tp->write_seq =
- tw->tw_snd_nxt + 65535 + 2) == 0)
+ tcptw->tw_ts_recent_stamp > 1))) {
+ tp->write_seq = tcptw->tw_snd_nxt + 65535 + 2;
+ if (tp->write_seq == 0)
tp->write_seq = 1;
- tp->rx_opt.ts_recent = tw->tw_ts_recent;
- tp->rx_opt.ts_recent_stamp = tw->tw_ts_recent_stamp;
+ tp->rx_opt.ts_recent = tcptw->tw_ts_recent;
+ tp->rx_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
sock_hold(sk2);
goto unique;
} else
@@ -611,7 +179,7 @@ static int __tcp_v4_check_established(struct sock *sk, __u16 lport,
/* And established part... */
sk_for_each(sk2, node, &head->chain) {
- if (TCP_IPV4_MATCH(sk2, acookie, saddr, daddr, ports, dif))
+ if (INET_MATCH(sk2, acookie, saddr, daddr, ports, dif))
goto not_unique;
}
@@ -631,10 +199,10 @@ unique:
NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
} else if (tw) {
/* Silly. Should hash-dance instead... */
- tcp_tw_deschedule(tw);
+ inet_twsk_deschedule(tw, &tcp_death_row);
NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
}
return 0;
@@ -657,9 +225,9 @@ static inline u32 connect_port_offset(const struct sock *sk)
*/
static inline int tcp_v4_hash_connect(struct sock *sk)
{
- unsigned short snum = inet_sk(sk)->num;
- struct tcp_bind_hashbucket *head;
- struct tcp_bind_bucket *tb;
+ const unsigned short snum = inet_sk(sk)->num;
+ struct inet_bind_hashbucket *head;
+ struct inet_bind_bucket *tb;
int ret;
if (!snum) {
@@ -671,19 +239,19 @@ static inline int tcp_v4_hash_connect(struct sock *sk)
static u32 hint;
u32 offset = hint + connect_port_offset(sk);
struct hlist_node *node;
- struct tcp_tw_bucket *tw = NULL;
+ struct inet_timewait_sock *tw = NULL;
local_bh_disable();
for (i = 1; i <= range; i++) {
port = low + (i + offset) % range;
- head = &tcp_bhash[tcp_bhashfn(port)];
+ head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)];
spin_lock(&head->lock);
/* Does not bother with rcv_saddr checks,
* because the established check is already
* unique enough.
*/
- tb_for_each(tb, node, &head->chain) {
+ inet_bind_bucket_for_each(tb, node, &head->chain) {
if (tb->port == port) {
BUG_TRAP(!hlist_empty(&tb->owners));
if (tb->fastreuse >= 0)
@@ -696,7 +264,7 @@ static inline int tcp_v4_hash_connect(struct sock *sk)
}
}
- tb = tcp_bucket_create(head, port);
+ tb = inet_bind_bucket_create(tcp_hashinfo.bind_bucket_cachep, head, port);
if (!tb) {
spin_unlock(&head->lock);
break;
@@ -715,27 +283,27 @@ ok:
hint += i;
/* Head lock still held and bh's disabled */
- tcp_bind_hash(sk, tb, port);
+ inet_bind_hash(sk, tb, port);
if (sk_unhashed(sk)) {
inet_sk(sk)->sport = htons(port);
- __tcp_v4_hash(sk, 0);
+ __inet_hash(&tcp_hashinfo, sk, 0);
}
spin_unlock(&head->lock);
if (tw) {
- tcp_tw_deschedule(tw);
- tcp_tw_put(tw);
+ inet_twsk_deschedule(tw, &tcp_death_row);;
+ inet_twsk_put(tw);
}
ret = 0;
goto out;
}
- head = &tcp_bhash[tcp_bhashfn(snum)];
- tb = tcp_sk(sk)->bind_hash;
+ head = &tcp_hashinfo.bhash[inet_bhashfn(snum, tcp_hashinfo.bhash_size)];
+ tb = inet_csk(sk)->icsk_bind_hash;
spin_lock_bh(&head->lock);
if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {
- __tcp_v4_hash(sk, 0);
+ __inet_hash(&tcp_hashinfo, sk, 0);
spin_unlock_bh(&head->lock);
return 0;
} else {
@@ -798,7 +366,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
tp->write_seq = 0;
}
- if (sysctl_tcp_tw_recycle &&
+ if (tcp_death_row.sysctl_tw_recycle &&
!tp->rx_opt.ts_recent_stamp && rt->rt_dst == daddr) {
struct inet_peer *peer = rt_get_peer(rt);
@@ -837,8 +405,7 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
goto failure;
/* OK, now commit destination to socket. */
- __sk_dst_set(sk, &rt->u.dst);
- tcp_v4_setup_caps(sk, &rt->u.dst);
+ sk_setup_caps(sk, &rt->u.dst);
if (!tp->write_seq)
tp->write_seq = secure_tcp_sequence_number(inet->saddr,
@@ -864,53 +431,6 @@ failure:
return err;
}
-static __inline__ int tcp_v4_iif(struct sk_buff *skb)
-{
- return ((struct rtable *)skb->dst)->rt_iif;
-}
-
-static __inline__ u32 tcp_v4_synq_hash(u32 raddr, u16 rport, u32 rnd)
-{
- return (jhash_2words(raddr, (u32) rport, rnd) & (TCP_SYNQ_HSIZE - 1));
-}
-
-static struct request_sock *tcp_v4_search_req(struct tcp_sock *tp,
- struct request_sock ***prevp,
- __u16 rport,
- __u32 raddr, __u32 laddr)
-{
- struct listen_sock *lopt = tp->accept_queue.listen_opt;
- struct request_sock *req, **prev;
-
- for (prev = &lopt->syn_table[tcp_v4_synq_hash(raddr, rport, lopt->hash_rnd)];
- (req = *prev) != NULL;
- prev = &req->dl_next) {
- const struct inet_request_sock *ireq = inet_rsk(req);
-
- if (ireq->rmt_port == rport &&
- ireq->rmt_addr == raddr &&
- ireq->loc_addr == laddr &&
- TCP_INET_FAMILY(req->rsk_ops->family)) {
- BUG_TRAP(!req->sk);
- *prevp = prev;
- break;
- }
- }
-
- return req;
-}
-
-static void tcp_v4_synq_add(struct sock *sk, struct request_sock *req)
-{
- struct tcp_sock *tp = tcp_sk(sk);
- struct listen_sock *lopt = tp->accept_queue.listen_opt;
- u32 h = tcp_v4_synq_hash(inet_rsk(req)->rmt_addr, inet_rsk(req)->rmt_port, lopt->hash_rnd);
-
- reqsk_queue_hash_req(&tp->accept_queue, h, req, TCP_TIMEOUT_INIT);
- tcp_synq_added(sk);
-}
-
-
/*
* This routine does path mtu discovery as defined in RFC1191.
*/
@@ -993,14 +513,14 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
return;
}
- sk = tcp_v4_lookup(iph->daddr, th->dest, iph->saddr,
- th->source, tcp_v4_iif(skb));
+ sk = inet_lookup(&tcp_hashinfo, iph->daddr, th->dest, iph->saddr,
+ th->source, inet_iif(skb));
if (!sk) {
ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
return;
}
if (sk->sk_state == TCP_TIME_WAIT) {
- tcp_tw_put((struct tcp_tw_bucket *)sk);
+ inet_twsk_put((struct inet_timewait_sock *)sk);
return;
}
@@ -1054,8 +574,8 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
if (sock_owned_by_user(sk))
goto out;
- req = tcp_v4_search_req(tp, &prev, th->dest,
- iph->daddr, iph->saddr);
+ req = inet_csk_search_req(sk, &prev, th->dest,
+ iph->daddr, iph->saddr);
if (!req)
goto out;
@@ -1075,7 +595,7 @@ void tcp_v4_err(struct sk_buff *skb, u32 info)
* created socket, and POSIX does not want network
* errors returned from accept().
*/
- tcp_synq_drop(sk, req, prev);
+ inet_csk_reqsk_queue_drop(sk, req, prev);
goto out;
case TCP_SYN_SENT:
@@ -1245,12 +765,13 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
{
- struct tcp_tw_bucket *tw = (struct tcp_tw_bucket *)sk;
+ struct inet_timewait_sock *tw = inet_twsk(sk);
+ const struct tcp_timewait_sock *tcptw = tcp_twsk(sk);
- tcp_v4_send_ack(skb, tw->tw_snd_nxt, tw->tw_rcv_nxt,
- tw->tw_rcv_wnd >> tw->tw_rcv_wscale, tw->tw_ts_recent);
+ tcp_v4_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
+ tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale, tcptw->tw_ts_recent);
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
}
static void tcp_v4_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
@@ -1259,36 +780,6 @@ static void tcp_v4_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
req->ts_recent);
}
-static struct dst_entry* tcp_v4_route_req(struct sock *sk,
- struct request_sock *req)
-{
- struct rtable *rt;
- const struct inet_request_sock *ireq = inet_rsk(req);
- struct ip_options *opt = inet_rsk(req)->opt;
- struct flowi fl = { .oif = sk->sk_bound_dev_if,
- .nl_u = { .ip4_u =
- { .daddr = ((opt && opt->srr) ?
- opt->faddr :
- ireq->rmt_addr),
- .saddr = ireq->loc_addr,
- .tos = RT_CONN_FLAGS(sk) } },
- .proto = IPPROTO_TCP,
- .uli_u = { .ports =
- { .sport = inet_sk(sk)->sport,
- .dport = ireq->rmt_port } } };
-
- if (ip_route_output_flow(&rt, &fl, sk, 0)) {
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
- return NULL;
- }
- if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway) {
- ip_rt_put(rt);
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
- return NULL;
- }
- return &rt->u.dst;
-}
-
/*
* Send a SYN-ACK after having received an ACK.
* This still operates on a request_sock only, not on a big
@@ -1302,7 +793,7 @@ static int tcp_v4_send_synack(struct sock *sk, struct request_sock *req,
struct sk_buff * skb;
/* First, grab a route. */
- if (!dst && (dst = tcp_v4_route_req(sk, req)) == NULL)
+ if (!dst && (dst = inet_csk_route_req(sk, req)) == NULL)
goto out;
skb = tcp_make_synack(sk, dst, req);
@@ -1404,7 +895,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* limitations, they conserve resources and peer is
* evidently real one.
*/
- if (tcp_synq_is_full(sk) && !isn) {
+ if (inet_csk_reqsk_queue_is_full(sk) && !isn) {
#ifdef CONFIG_SYN_COOKIES
if (sysctl_tcp_syncookies) {
want_cookie = 1;
@@ -1418,7 +909,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* clogging syn queue with openreqs with exponentially increasing
* timeout.
*/
- if (sk_acceptq_is_full(sk) && tcp_synq_young(sk) > 1)
+ if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
goto drop;
req = reqsk_alloc(&tcp_request_sock_ops);
@@ -1474,8 +965,8 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* are made in the function processing timewait state.
*/
if (tmp_opt.saw_tstamp &&
- sysctl_tcp_tw_recycle &&
- (dst = tcp_v4_route_req(sk, req)) != NULL &&
+ tcp_death_row.sysctl_tw_recycle &&
+ (dst = inet_csk_route_req(sk, req)) != NULL &&
(peer = rt_get_peer((struct rtable *)dst)) != NULL &&
peer->v4daddr == saddr) {
if (xtime.tv_sec < peer->tcp_ts_stamp + TCP_PAWS_MSL &&
@@ -1488,7 +979,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
}
/* Kill the following clause, if you dislike this way. */
else if (!sysctl_tcp_syncookies &&
- (sysctl_max_syn_backlog - tcp_synq_len(sk) <
+ (sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
(sysctl_max_syn_backlog >> 2)) &&
(!peer || !peer->tcp_ts_stamp) &&
(!dst || !dst_metric(dst, RTAX_RTT))) {
@@ -1499,11 +990,10 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* to destinations, already remembered
* to the moment of synflood.
*/
- LIMIT_NETDEBUG(printk(KERN_DEBUG "TCP: drop open "
- "request from %u.%u."
- "%u.%u/%u\n",
- NIPQUAD(saddr),
- ntohs(skb->h.th->source)));
+ LIMIT_NETDEBUG(KERN_DEBUG "TCP: drop open "
+ "request from %u.%u.%u.%u/%u\n",
+ NIPQUAD(saddr),
+ ntohs(skb->h.th->source));
dst_release(dst);
goto drop_and_free;
}
@@ -1518,7 +1008,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
if (want_cookie) {
reqsk_free(req);
} else {
- tcp_v4_synq_add(sk, req);
+ inet_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT);
}
return 0;
@@ -1546,15 +1036,14 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
if (sk_acceptq_is_full(sk))
goto exit_overflow;
- if (!dst && (dst = tcp_v4_route_req(sk, req)) == NULL)
+ if (!dst && (dst = inet_csk_route_req(sk, req)) == NULL)
goto exit;
newsk = tcp_create_openreq_child(sk, req, skb);
if (!newsk)
goto exit;
- newsk->sk_dst_cache = dst;
- tcp_v4_setup_caps(newsk, dst);
+ sk_setup_caps(newsk, dst);
newtp = tcp_sk(newsk);
newinet = inet_sk(newsk);
@@ -1564,7 +1053,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newinet->saddr = ireq->loc_addr;
newinet->opt = ireq->opt;
ireq->opt = NULL;
- newinet->mc_index = tcp_v4_iif(skb);
+ newinet->mc_index = inet_iif(skb);
newinet->mc_ttl = skb->nh.iph->ttl;
newtp->ext_header_len = 0;
if (newinet->opt)
@@ -1575,8 +1064,8 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newtp->advmss = dst_metric(dst, RTAX_ADVMSS);
tcp_initialize_rcv_mss(newsk);
- __tcp_v4_hash(newsk, 0);
- __tcp_inherit_port(sk, newsk);
+ __inet_hash(&tcp_hashinfo, newsk, 0);
+ __inet_inherit_port(&tcp_hashinfo, sk, newsk);
return newsk;
@@ -1592,27 +1081,24 @@ static struct sock *tcp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
{
struct tcphdr *th = skb->h.th;
struct iphdr *iph = skb->nh.iph;
- struct tcp_sock *tp = tcp_sk(sk);
struct sock *nsk;
struct request_sock **prev;
/* Find possible connection requests. */
- struct request_sock *req = tcp_v4_search_req(tp, &prev, th->source,
- iph->saddr, iph->daddr);
+ struct request_sock *req = inet_csk_search_req(sk, &prev, th->source,
+ iph->saddr, iph->daddr);
if (req)
return tcp_check_req(sk, skb, req, prev);
- nsk = __tcp_v4_lookup_established(skb->nh.iph->saddr,
- th->source,
- skb->nh.iph->daddr,
- ntohs(th->dest),
- tcp_v4_iif(skb));
+ nsk = __inet_lookup_established(&tcp_hashinfo, skb->nh.iph->saddr,
+ th->source, skb->nh.iph->daddr,
+ ntohs(th->dest), inet_iif(skb));
if (nsk) {
if (nsk->sk_state != TCP_TIME_WAIT) {
bh_lock_sock(nsk);
return nsk;
}
- tcp_tw_put((struct tcp_tw_bucket *)nsk);
+ inet_twsk_put((struct inet_timewait_sock *)nsk);
return NULL;
}
@@ -1631,7 +1117,7 @@ static int tcp_v4_checksum_init(struct sk_buff *skb)
skb->nh.iph->daddr, skb->csum))
return 0;
- LIMIT_NETDEBUG(printk(KERN_DEBUG "hw tcp v4 csum failed\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "hw tcp v4 csum failed\n");
skb->ip_summed = CHECKSUM_NONE;
}
if (skb->len <= 76) {
@@ -1747,9 +1233,9 @@ int tcp_v4_rcv(struct sk_buff *skb)
TCP_SKB_CB(skb)->flags = skb->nh.iph->tos;
TCP_SKB_CB(skb)->sacked = 0;
- sk = __tcp_v4_lookup(skb->nh.iph->saddr, th->source,
- skb->nh.iph->daddr, ntohs(th->dest),
- tcp_v4_iif(skb));
+ sk = __inet_lookup(&tcp_hashinfo, skb->nh.iph->saddr, th->source,
+ skb->nh.iph->daddr, ntohs(th->dest),
+ inet_iif(skb));
if (!sk)
goto no_tcp_socket;
@@ -1801,24 +1287,26 @@ discard_and_relse:
do_time_wait:
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- tcp_tw_put((struct tcp_tw_bucket *) sk);
+ inet_twsk_put((struct inet_timewait_sock *) sk);
goto discard_it;
}
if (skb->len < (th->doff << 2) || tcp_checksum_complete(skb)) {
TCP_INC_STATS_BH(TCP_MIB_INERRS);
- tcp_tw_put((struct tcp_tw_bucket *) sk);
+ inet_twsk_put((struct inet_timewait_sock *) sk);
goto discard_it;
}
- switch (tcp_timewait_state_process((struct tcp_tw_bucket *)sk,
- skb, th, skb->len)) {
+ switch (tcp_timewait_state_process((struct inet_timewait_sock *)sk,
+ skb, th)) {
case TCP_TW_SYN: {
- struct sock *sk2 = tcp_v4_lookup_listener(skb->nh.iph->daddr,
- ntohs(th->dest),
- tcp_v4_iif(skb));
+ struct sock *sk2 = inet_lookup_listener(&tcp_hashinfo,
+ skb->nh.iph->daddr,
+ ntohs(th->dest),
+ inet_iif(skb));
if (sk2) {
- tcp_tw_deschedule((struct tcp_tw_bucket *)sk);
- tcp_tw_put((struct tcp_tw_bucket *)sk);
+ inet_twsk_deschedule((struct inet_timewait_sock *)sk,
+ &tcp_death_row);
+ inet_twsk_put((struct inet_timewait_sock *)sk);
sk = sk2;
goto process;
}
@@ -1834,112 +1322,6 @@ do_time_wait:
goto discard_it;
}
-/* With per-bucket locks this operation is not-atomic, so that
- * this version is not worse.
- */
-static void __tcp_v4_rehash(struct sock *sk)
-{
- sk->sk_prot->unhash(sk);
- sk->sk_prot->hash(sk);
-}
-
-static int tcp_v4_reselect_saddr(struct sock *sk)
-{
- struct inet_sock *inet = inet_sk(sk);
- int err;
- struct rtable *rt;
- __u32 old_saddr = inet->saddr;
- __u32 new_saddr;
- __u32 daddr = inet->daddr;
-
- if (inet->opt && inet->opt->srr)
- daddr = inet->opt->faddr;
-
- /* Query new route. */
- err = ip_route_connect(&rt, daddr, 0,
- RT_CONN_FLAGS(sk),
- sk->sk_bound_dev_if,
- IPPROTO_TCP,
- inet->sport, inet->dport, sk);
- if (err)
- return err;
-
- __sk_dst_set(sk, &rt->u.dst);
- tcp_v4_setup_caps(sk, &rt->u.dst);
-
- new_saddr = rt->rt_src;
-
- if (new_saddr == old_saddr)
- return 0;
-
- if (sysctl_ip_dynaddr > 1) {
- printk(KERN_INFO "tcp_v4_rebuild_header(): shifting inet->"
- "saddr from %d.%d.%d.%d to %d.%d.%d.%d\n",
- NIPQUAD(old_saddr),
- NIPQUAD(new_saddr));
- }
-
- inet->saddr = new_saddr;
- inet->rcv_saddr = new_saddr;
-
- /* XXX The only one ugly spot where we need to
- * XXX really change the sockets identity after
- * XXX it has entered the hashes. -DaveM
- *
- * Besides that, it does not check for connection
- * uniqueness. Wait for troubles.
- */
- __tcp_v4_rehash(sk);
- return 0;
-}
-
-int tcp_v4_rebuild_header(struct sock *sk)
-{
- struct inet_sock *inet = inet_sk(sk);
- struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
- u32 daddr;
- int err;
-
- /* Route is OK, nothing to do. */
- if (rt)
- return 0;
-
- /* Reroute. */
- daddr = inet->daddr;
- if (inet->opt && inet->opt->srr)
- daddr = inet->opt->faddr;
-
- {
- struct flowi fl = { .oif = sk->sk_bound_dev_if,
- .nl_u = { .ip4_u =
- { .daddr = daddr,
- .saddr = inet->saddr,
- .tos = RT_CONN_FLAGS(sk) } },
- .proto = IPPROTO_TCP,
- .uli_u = { .ports =
- { .sport = inet->sport,
- .dport = inet->dport } } };
-
- err = ip_route_output_flow(&rt, &fl, sk, 0);
- }
- if (!err) {
- __sk_dst_set(sk, &rt->u.dst);
- tcp_v4_setup_caps(sk, &rt->u.dst);
- return 0;
- }
-
- /* Routing failed... */
- sk->sk_route_caps = 0;
-
- if (!sysctl_ip_dynaddr ||
- sk->sk_state != TCP_SYN_SENT ||
- (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
- (err = tcp_v4_reselect_saddr(sk)) != 0)
- sk->sk_err_soft = -err;
-
- return err;
-}
-
static void v4_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr)
{
struct sockaddr_in *sin = (struct sockaddr_in *) uaddr;
@@ -1988,18 +1370,18 @@ int tcp_v4_remember_stamp(struct sock *sk)
return 0;
}
-int tcp_v4_tw_remember_stamp(struct tcp_tw_bucket *tw)
+int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw)
{
- struct inet_peer *peer = NULL;
-
- peer = inet_getpeer(tw->tw_daddr, 1);
+ struct inet_peer *peer = inet_getpeer(tw->tw_daddr, 1);
if (peer) {
- if ((s32)(peer->tcp_ts - tw->tw_ts_recent) <= 0 ||
+ const struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
+
+ if ((s32)(peer->tcp_ts - tcptw->tw_ts_recent) <= 0 ||
(peer->tcp_ts_stamp + TCP_PAWS_MSL < xtime.tv_sec &&
- peer->tcp_ts_stamp <= tw->tw_ts_recent_stamp)) {
- peer->tcp_ts_stamp = tw->tw_ts_recent_stamp;
- peer->tcp_ts = tw->tw_ts_recent;
+ peer->tcp_ts_stamp <= tcptw->tw_ts_recent_stamp)) {
+ peer->tcp_ts_stamp = tcptw->tw_ts_recent_stamp;
+ peer->tcp_ts = tcptw->tw_ts_recent;
}
inet_putpeer(peer);
return 1;
@@ -2011,7 +1393,7 @@ int tcp_v4_tw_remember_stamp(struct tcp_tw_bucket *tw)
struct tcp_func ipv4_specific = {
.queue_xmit = ip_queue_xmit,
.send_check = tcp_v4_send_check,
- .rebuild_header = tcp_v4_rebuild_header,
+ .rebuild_header = inet_sk_rebuild_header,
.conn_request = tcp_v4_conn_request,
.syn_recv_sock = tcp_v4_syn_recv_sock,
.remember_stamp = tcp_v4_remember_stamp,
@@ -2027,13 +1409,14 @@ struct tcp_func ipv4_specific = {
*/
static int tcp_v4_init_sock(struct sock *sk)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
skb_queue_head_init(&tp->out_of_order_queue);
tcp_init_xmit_timers(sk);
tcp_prequeue_init(tp);
- tp->rto = TCP_TIMEOUT_INIT;
+ icsk->icsk_rto = TCP_TIMEOUT_INIT;
tp->mdev = TCP_TIMEOUT_INIT;
/* So many TCP implementations out there (incorrectly) count the
@@ -2051,7 +1434,7 @@ static int tcp_v4_init_sock(struct sock *sk)
tp->mss_cache = 536;
tp->reordering = sysctl_tcp_reordering;
- tp->ca_ops = &tcp_init_congestion_ops;
+ icsk->icsk_ca_ops = &tcp_init_congestion_ops;
sk->sk_state = TCP_CLOSE;
@@ -2074,7 +1457,7 @@ int tcp_v4_destroy_sock(struct sock *sk)
tcp_clear_xmit_timers(sk);
- tcp_cleanup_congestion_control(tp);
+ tcp_cleanup_congestion_control(sk);
/* Cleanup up the write buffer. */
sk_stream_writequeue_purge(sk);
@@ -2086,8 +1469,8 @@ int tcp_v4_destroy_sock(struct sock *sk)
__skb_queue_purge(&tp->ucopy.prequeue);
/* Clean up a referenced TCP bind bucket. */
- if (tp->bind_hash)
- tcp_put_port(sk);
+ if (inet_csk(sk)->icsk_bind_hash)
+ inet_put_port(&tcp_hashinfo, sk);
/*
* If sendmsg cached page exists, toss it.
@@ -2107,13 +1490,13 @@ EXPORT_SYMBOL(tcp_v4_destroy_sock);
#ifdef CONFIG_PROC_FS
/* Proc filesystem TCP sock list dumping. */
-static inline struct tcp_tw_bucket *tw_head(struct hlist_head *head)
+static inline struct inet_timewait_sock *tw_head(struct hlist_head *head)
{
return hlist_empty(head) ? NULL :
- list_entry(head->first, struct tcp_tw_bucket, tw_node);
+ list_entry(head->first, struct inet_timewait_sock, tw_node);
}
-static inline struct tcp_tw_bucket *tw_next(struct tcp_tw_bucket *tw)
+static inline struct inet_timewait_sock *tw_next(struct inet_timewait_sock *tw)
{
return tw->tw_node.next ?
hlist_entry(tw->tw_node.next, typeof(*tw), tw_node) : NULL;
@@ -2121,14 +1504,14 @@ static inline struct tcp_tw_bucket *tw_next(struct tcp_tw_bucket *tw)
static void *listening_get_next(struct seq_file *seq, void *cur)
{
- struct tcp_sock *tp;
+ struct inet_connection_sock *icsk;
struct hlist_node *node;
struct sock *sk = cur;
struct tcp_iter_state* st = seq->private;
if (!sk) {
st->bucket = 0;
- sk = sk_head(&tcp_listening_hash[0]);
+ sk = sk_head(&tcp_hashinfo.listening_hash[0]);
goto get_sk;
}
@@ -2137,7 +1520,7 @@ static void *listening_get_next(struct seq_file *seq, void *cur)
if (st->state == TCP_SEQ_STATE_OPENREQ) {
struct request_sock *req = cur;
- tp = tcp_sk(st->syn_wait_sk);
+ icsk = inet_csk(st->syn_wait_sk);
req = req->dl_next;
while (1) {
while (req) {
@@ -2150,17 +1533,17 @@ static void *listening_get_next(struct seq_file *seq, void *cur)
if (++st->sbucket >= TCP_SYNQ_HSIZE)
break;
get_req:
- req = tp->accept_queue.listen_opt->syn_table[st->sbucket];
+ req = icsk->icsk_accept_queue.listen_opt->syn_table[st->sbucket];
}
sk = sk_next(st->syn_wait_sk);
st->state = TCP_SEQ_STATE_LISTENING;
- read_unlock_bh(&tp->accept_queue.syn_wait_lock);
+ read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
} else {
- tp = tcp_sk(sk);
- read_lock_bh(&tp->accept_queue.syn_wait_lock);
- if (reqsk_queue_len(&tp->accept_queue))
+ icsk = inet_csk(sk);
+ read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
+ if (reqsk_queue_len(&icsk->icsk_accept_queue))
goto start_req;
- read_unlock_bh(&tp->accept_queue.syn_wait_lock);
+ read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
sk = sk_next(sk);
}
get_sk:
@@ -2169,9 +1552,9 @@ get_sk:
cur = sk;
goto out;
}
- tp = tcp_sk(sk);
- read_lock_bh(&tp->accept_queue.syn_wait_lock);
- if (reqsk_queue_len(&tp->accept_queue)) {
+ icsk = inet_csk(sk);
+ read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
+ if (reqsk_queue_len(&icsk->icsk_accept_queue)) {
start_req:
st->uid = sock_i_uid(sk);
st->syn_wait_sk = sk;
@@ -2179,10 +1562,10 @@ start_req:
st->sbucket = 0;
goto get_req;
}
- read_unlock_bh(&tp->accept_queue.syn_wait_lock);
+ read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
}
- if (++st->bucket < TCP_LHTABLE_SIZE) {
- sk = sk_head(&tcp_listening_hash[st->bucket]);
+ if (++st->bucket < INET_LHTABLE_SIZE) {
+ sk = sk_head(&tcp_hashinfo.listening_hash[st->bucket]);
goto get_sk;
}
cur = NULL;
@@ -2206,16 +1589,16 @@ static void *established_get_first(struct seq_file *seq)
struct tcp_iter_state* st = seq->private;
void *rc = NULL;
- for (st->bucket = 0; st->bucket < tcp_ehash_size; ++st->bucket) {
+ for (st->bucket = 0; st->bucket < tcp_hashinfo.ehash_size; ++st->bucket) {
struct sock *sk;
struct hlist_node *node;
- struct tcp_tw_bucket *tw;
+ struct inet_timewait_sock *tw;
/* We can reschedule _before_ having picked the target: */
cond_resched_softirq();
- read_lock(&tcp_ehash[st->bucket].lock);
- sk_for_each(sk, node, &tcp_ehash[st->bucket].chain) {
+ read_lock(&tcp_hashinfo.ehash[st->bucket].lock);
+ sk_for_each(sk, node, &tcp_hashinfo.ehash[st->bucket].chain) {
if (sk->sk_family != st->family) {
continue;
}
@@ -2223,15 +1606,15 @@ static void *established_get_first(struct seq_file *seq)
goto out;
}
st->state = TCP_SEQ_STATE_TIME_WAIT;
- tw_for_each(tw, node,
- &tcp_ehash[st->bucket + tcp_ehash_size].chain) {
+ inet_twsk_for_each(tw, node,
+ &tcp_hashinfo.ehash[st->bucket + tcp_hashinfo.ehash_size].chain) {
if (tw->tw_family != st->family) {
continue;
}
rc = tw;
goto out;
}
- read_unlock(&tcp_ehash[st->bucket].lock);
+ read_unlock(&tcp_hashinfo.ehash[st->bucket].lock);
st->state = TCP_SEQ_STATE_ESTABLISHED;
}
out:
@@ -2241,7 +1624,7 @@ out:
static void *established_get_next(struct seq_file *seq, void *cur)
{
struct sock *sk = cur;
- struct tcp_tw_bucket *tw;
+ struct inet_timewait_sock *tw;
struct hlist_node *node;
struct tcp_iter_state* st = seq->private;
@@ -2258,15 +1641,15 @@ get_tw:
cur = tw;
goto out;
}
- read_unlock(&tcp_ehash[st->bucket].lock);
+ read_unlock(&tcp_hashinfo.ehash[st->bucket].lock);
st->state = TCP_SEQ_STATE_ESTABLISHED;
/* We can reschedule between buckets: */
cond_resched_softirq();
- if (++st->bucket < tcp_ehash_size) {
- read_lock(&tcp_ehash[st->bucket].lock);
- sk = sk_head(&tcp_ehash[st->bucket].chain);
+ if (++st->bucket < tcp_hashinfo.ehash_size) {
+ read_lock(&tcp_hashinfo.ehash[st->bucket].lock);
+ sk = sk_head(&tcp_hashinfo.ehash[st->bucket].chain);
} else {
cur = NULL;
goto out;
@@ -2280,7 +1663,7 @@ get_tw:
}
st->state = TCP_SEQ_STATE_TIME_WAIT;
- tw = tw_head(&tcp_ehash[st->bucket + tcp_ehash_size].chain);
+ tw = tw_head(&tcp_hashinfo.ehash[st->bucket + tcp_hashinfo.ehash_size].chain);
goto get_tw;
found:
cur = sk;
@@ -2304,12 +1687,12 @@ static void *tcp_get_idx(struct seq_file *seq, loff_t pos)
void *rc;
struct tcp_iter_state* st = seq->private;
- tcp_listen_lock();
+ inet_listen_lock(&tcp_hashinfo);
st->state = TCP_SEQ_STATE_LISTENING;
rc = listening_get_idx(seq, &pos);
if (!rc) {
- tcp_listen_unlock();
+ inet_listen_unlock(&tcp_hashinfo);
local_bh_disable();
st->state = TCP_SEQ_STATE_ESTABLISHED;
rc = established_get_idx(seq, pos);
@@ -2342,7 +1725,7 @@ static void *tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
case TCP_SEQ_STATE_LISTENING:
rc = listening_get_next(seq, v);
if (!rc) {
- tcp_listen_unlock();
+ inet_listen_unlock(&tcp_hashinfo);
local_bh_disable();
st->state = TCP_SEQ_STATE_ESTABLISHED;
rc = established_get_first(seq);
@@ -2365,17 +1748,17 @@ static void tcp_seq_stop(struct seq_file *seq, void *v)
switch (st->state) {
case TCP_SEQ_STATE_OPENREQ:
if (v) {
- struct tcp_sock *tp = tcp_sk(st->syn_wait_sk);
- read_unlock_bh(&tp->accept_queue.syn_wait_lock);
+ struct inet_connection_sock *icsk = inet_csk(st->syn_wait_sk);
+ read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
}
case TCP_SEQ_STATE_LISTENING:
if (v != SEQ_START_TOKEN)
- tcp_listen_unlock();
+ inet_listen_unlock(&tcp_hashinfo);
break;
case TCP_SEQ_STATE_TIME_WAIT:
case TCP_SEQ_STATE_ESTABLISHED:
if (v)
- read_unlock(&tcp_ehash[st->bucket].lock);
+ read_unlock(&tcp_hashinfo.ehash[st->bucket].lock);
local_bh_enable();
break;
}
@@ -2472,18 +1855,19 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i)
int timer_active;
unsigned long timer_expires;
struct tcp_sock *tp = tcp_sk(sp);
+ const struct inet_connection_sock *icsk = inet_csk(sp);
struct inet_sock *inet = inet_sk(sp);
unsigned int dest = inet->daddr;
unsigned int src = inet->rcv_saddr;
__u16 destp = ntohs(inet->dport);
__u16 srcp = ntohs(inet->sport);
- if (tp->pending == TCP_TIME_RETRANS) {
+ if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
timer_active = 1;
- timer_expires = tp->timeout;
- } else if (tp->pending == TCP_TIME_PROBE0) {
+ timer_expires = icsk->icsk_timeout;
+ } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
timer_active = 4;
- timer_expires = tp->timeout;
+ timer_expires = icsk->icsk_timeout;
} else if (timer_pending(&sp->sk_timer)) {
timer_active = 2;
timer_expires = sp->sk_timer.expires;
@@ -2498,17 +1882,19 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i)
tp->write_seq - tp->snd_una, tp->rcv_nxt - tp->copied_seq,
timer_active,
jiffies_to_clock_t(timer_expires - jiffies),
- tp->retransmits,
+ icsk->icsk_retransmits,
sock_i_uid(sp),
- tp->probes_out,
+ icsk->icsk_probes_out,
sock_i_ino(sp),
atomic_read(&sp->sk_refcnt), sp,
- tp->rto, tp->ack.ato, (tp->ack.quick << 1) | tp->ack.pingpong,
+ icsk->icsk_rto,
+ icsk->icsk_ack.ato,
+ (icsk->icsk_ack.quick << 1) | icsk->icsk_ack.pingpong,
tp->snd_cwnd,
tp->snd_ssthresh >= 0xFFFF ? -1 : tp->snd_ssthresh);
}
-static void get_timewait4_sock(struct tcp_tw_bucket *tw, char *tmpbuf, int i)
+static void get_timewait4_sock(struct inet_timewait_sock *tw, char *tmpbuf, int i)
{
unsigned int dest, src;
__u16 destp, srcp;
@@ -2588,7 +1974,7 @@ struct proto tcp_prot = {
.close = tcp_close,
.connect = tcp_v4_connect,
.disconnect = tcp_disconnect,
- .accept = tcp_accept,
+ .accept = inet_csk_accept,
.ioctl = tcp_ioctl,
.init = tcp_v4_init_sock,
.destroy = tcp_v4_destroy_sock,
@@ -2603,6 +1989,7 @@ struct proto tcp_prot = {
.get_port = tcp_v4_get_port,
.enter_memory_pressure = tcp_enter_memory_pressure,
.sockets_allocated = &tcp_sockets_allocated,
+ .orphan_count = &tcp_orphan_count,
.memory_allocated = &tcp_memory_allocated,
.memory_pressure = &tcp_memory_pressure,
.sysctl_mem = sysctl_tcp_mem,
@@ -2610,6 +1997,7 @@ struct proto tcp_prot = {
.sysctl_rmem = sysctl_tcp_rmem,
.max_header = MAX_TCP_HEADER,
.obj_size = sizeof(struct tcp_sock),
+ .twsk_obj_size = sizeof(struct tcp_timewait_sock),
.rsk_prot = &tcp_request_sock_ops,
};
@@ -2631,19 +2019,13 @@ void __init tcp_v4_init(struct net_proto_family *ops)
}
EXPORT_SYMBOL(ipv4_specific);
-EXPORT_SYMBOL(tcp_bind_hash);
-EXPORT_SYMBOL(tcp_bucket_create);
+EXPORT_SYMBOL(inet_bind_bucket_create);
EXPORT_SYMBOL(tcp_hashinfo);
-EXPORT_SYMBOL(tcp_inherit_port);
-EXPORT_SYMBOL(tcp_listen_wlock);
-EXPORT_SYMBOL(tcp_port_rover);
EXPORT_SYMBOL(tcp_prot);
-EXPORT_SYMBOL(tcp_put_port);
EXPORT_SYMBOL(tcp_unhash);
EXPORT_SYMBOL(tcp_v4_conn_request);
EXPORT_SYMBOL(tcp_v4_connect);
EXPORT_SYMBOL(tcp_v4_do_rcv);
-EXPORT_SYMBOL(tcp_v4_rebuild_header);
EXPORT_SYMBOL(tcp_v4_remember_stamp);
EXPORT_SYMBOL(tcp_v4_send_check);
EXPORT_SYMBOL(tcp_v4_syn_recv_sock);
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index f42a284164b7..a88db28b0af7 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -35,13 +35,27 @@
#define SYNC_INIT 1
#endif
-int sysctl_tcp_tw_recycle;
-int sysctl_tcp_max_tw_buckets = NR_FILE*2;
-
int sysctl_tcp_syncookies = SYNC_INIT;
int sysctl_tcp_abort_on_overflow;
-static void tcp_tw_schedule(struct tcp_tw_bucket *tw, int timeo);
+struct inet_timewait_death_row tcp_death_row = {
+ .sysctl_max_tw_buckets = NR_FILE * 2,
+ .period = TCP_TIMEWAIT_LEN / INET_TWDR_TWKILL_SLOTS,
+ .death_lock = SPIN_LOCK_UNLOCKED,
+ .hashinfo = &tcp_hashinfo,
+ .tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0,
+ (unsigned long)&tcp_death_row),
+ .twkill_work = __WORK_INITIALIZER(tcp_death_row.twkill_work,
+ inet_twdr_twkill_work,
+ &tcp_death_row),
+/* Short-time timewait calendar */
+
+ .twcal_hand = -1,
+ .twcal_timer = TIMER_INITIALIZER(inet_twdr_twcal_tick, 0,
+ (unsigned long)&tcp_death_row),
+};
+
+EXPORT_SYMBOL_GPL(tcp_death_row);
static __inline__ int tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
{
@@ -52,47 +66,6 @@ static __inline__ int tcp_in_window(u32 seq, u32 end_seq, u32 s_win, u32 e_win)
return (seq == e_win && seq == end_seq);
}
-/* New-style handling of TIME_WAIT sockets. */
-
-int tcp_tw_count;
-
-
-/* Must be called with locally disabled BHs. */
-static void tcp_timewait_kill(struct tcp_tw_bucket *tw)
-{
- struct tcp_ehash_bucket *ehead;
- struct tcp_bind_hashbucket *bhead;
- struct tcp_bind_bucket *tb;
-
- /* Unlink from established hashes. */
- ehead = &tcp_ehash[tw->tw_hashent];
- write_lock(&ehead->lock);
- if (hlist_unhashed(&tw->tw_node)) {
- write_unlock(&ehead->lock);
- return;
- }
- __hlist_del(&tw->tw_node);
- sk_node_init(&tw->tw_node);
- write_unlock(&ehead->lock);
-
- /* Disassociate with bind bucket. */
- bhead = &tcp_bhash[tcp_bhashfn(tw->tw_num)];
- spin_lock(&bhead->lock);
- tb = tw->tw_tb;
- __hlist_del(&tw->tw_bind_node);
- tw->tw_tb = NULL;
- tcp_bucket_destroy(tb);
- spin_unlock(&bhead->lock);
-
-#ifdef INET_REFCNT_DEBUG
- if (atomic_read(&tw->tw_refcnt) != 1) {
- printk(KERN_DEBUG "tw_bucket %p refcnt=%d\n", tw,
- atomic_read(&tw->tw_refcnt));
- }
-#endif
- tcp_tw_put(tw);
-}
-
/*
* * Main purpose of TIME-WAIT state is to close connection gracefully,
* when one of ends sits in LAST-ACK or CLOSING retransmitting FIN
@@ -122,19 +95,20 @@ static void tcp_timewait_kill(struct tcp_tw_bucket *tw)
* to avoid misread sequence numbers, states etc. --ANK
*/
enum tcp_tw_status
-tcp_timewait_state_process(struct tcp_tw_bucket *tw, struct sk_buff *skb,
- struct tcphdr *th, unsigned len)
+tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
+ const struct tcphdr *th)
{
+ struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
struct tcp_options_received tmp_opt;
int paws_reject = 0;
tmp_opt.saw_tstamp = 0;
- if (th->doff > (sizeof(struct tcphdr) >> 2) && tw->tw_ts_recent_stamp) {
+ if (th->doff > (sizeof(*th) >> 2) && tcptw->tw_ts_recent_stamp) {
tcp_parse_options(skb, &tmp_opt, 0);
if (tmp_opt.saw_tstamp) {
- tmp_opt.ts_recent = tw->tw_ts_recent;
- tmp_opt.ts_recent_stamp = tw->tw_ts_recent_stamp;
+ tmp_opt.ts_recent = tcptw->tw_ts_recent;
+ tmp_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
paws_reject = tcp_paws_check(&tmp_opt, th->rst);
}
}
@@ -145,20 +119,20 @@ tcp_timewait_state_process(struct tcp_tw_bucket *tw, struct sk_buff *skb,
/* Out of window, send ACK */
if (paws_reject ||
!tcp_in_window(TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq,
- tw->tw_rcv_nxt,
- tw->tw_rcv_nxt + tw->tw_rcv_wnd))
+ tcptw->tw_rcv_nxt,
+ tcptw->tw_rcv_nxt + tcptw->tw_rcv_wnd))
return TCP_TW_ACK;
if (th->rst)
goto kill;
- if (th->syn && !before(TCP_SKB_CB(skb)->seq, tw->tw_rcv_nxt))
+ if (th->syn && !before(TCP_SKB_CB(skb)->seq, tcptw->tw_rcv_nxt))
goto kill_with_rst;
/* Dup ACK? */
- if (!after(TCP_SKB_CB(skb)->end_seq, tw->tw_rcv_nxt) ||
+ if (!after(TCP_SKB_CB(skb)->end_seq, tcptw->tw_rcv_nxt) ||
TCP_SKB_CB(skb)->end_seq == TCP_SKB_CB(skb)->seq) {
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
return TCP_TW_SUCCESS;
}
@@ -166,19 +140,19 @@ tcp_timewait_state_process(struct tcp_tw_bucket *tw, struct sk_buff *skb,
* reset.
*/
if (!th->fin ||
- TCP_SKB_CB(skb)->end_seq != tw->tw_rcv_nxt + 1) {
+ TCP_SKB_CB(skb)->end_seq != tcptw->tw_rcv_nxt + 1) {
kill_with_rst:
- tcp_tw_deschedule(tw);
- tcp_tw_put(tw);
+ inet_twsk_deschedule(tw, &tcp_death_row);
+ inet_twsk_put(tw);
return TCP_TW_RST;
}
/* FIN arrived, enter true time-wait state. */
- tw->tw_substate = TCP_TIME_WAIT;
- tw->tw_rcv_nxt = TCP_SKB_CB(skb)->end_seq;
+ tw->tw_substate = TCP_TIME_WAIT;
+ tcptw->tw_rcv_nxt = TCP_SKB_CB(skb)->end_seq;
if (tmp_opt.saw_tstamp) {
- tw->tw_ts_recent_stamp = xtime.tv_sec;
- tw->tw_ts_recent = tmp_opt.rcv_tsval;
+ tcptw->tw_ts_recent_stamp = xtime.tv_sec;
+ tcptw->tw_ts_recent = tmp_opt.rcv_tsval;
}
/* I am shamed, but failed to make it more elegant.
@@ -187,11 +161,13 @@ kill_with_rst:
* do not undertsnad recycling in any case, it not
* a big problem in practice. --ANK */
if (tw->tw_family == AF_INET &&
- sysctl_tcp_tw_recycle && tw->tw_ts_recent_stamp &&
+ tcp_death_row.sysctl_tw_recycle && tcptw->tw_ts_recent_stamp &&
tcp_v4_tw_remember_stamp(tw))
- tcp_tw_schedule(tw, tw->tw_timeout);
+ inet_twsk_schedule(tw, &tcp_death_row, tw->tw_timeout,
+ TCP_TIMEWAIT_LEN);
else
- tcp_tw_schedule(tw, TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, &tcp_death_row, TCP_TIMEWAIT_LEN,
+ TCP_TIMEWAIT_LEN);
return TCP_TW_ACK;
}
@@ -213,7 +189,7 @@ kill_with_rst:
*/
if (!paws_reject &&
- (TCP_SKB_CB(skb)->seq == tw->tw_rcv_nxt &&
+ (TCP_SKB_CB(skb)->seq == tcptw->tw_rcv_nxt &&
(TCP_SKB_CB(skb)->seq == TCP_SKB_CB(skb)->end_seq || th->rst))) {
/* In window segment, it may be only reset or bare ack. */
@@ -224,19 +200,20 @@ kill_with_rst:
*/
if (sysctl_tcp_rfc1337 == 0) {
kill:
- tcp_tw_deschedule(tw);
- tcp_tw_put(tw);
+ inet_twsk_deschedule(tw, &tcp_death_row);
+ inet_twsk_put(tw);
return TCP_TW_SUCCESS;
}
}
- tcp_tw_schedule(tw, TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, &tcp_death_row, TCP_TIMEWAIT_LEN,
+ TCP_TIMEWAIT_LEN);
if (tmp_opt.saw_tstamp) {
- tw->tw_ts_recent = tmp_opt.rcv_tsval;
- tw->tw_ts_recent_stamp = xtime.tv_sec;
+ tcptw->tw_ts_recent = tmp_opt.rcv_tsval;
+ tcptw->tw_ts_recent_stamp = xtime.tv_sec;
}
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
return TCP_TW_SUCCESS;
}
@@ -258,9 +235,10 @@ kill:
*/
if (th->syn && !th->rst && !th->ack && !paws_reject &&
- (after(TCP_SKB_CB(skb)->seq, tw->tw_rcv_nxt) ||
- (tmp_opt.saw_tstamp && (s32)(tw->tw_ts_recent - tmp_opt.rcv_tsval) < 0))) {
- u32 isn = tw->tw_snd_nxt + 65535 + 2;
+ (after(TCP_SKB_CB(skb)->seq, tcptw->tw_rcv_nxt) ||
+ (tmp_opt.saw_tstamp &&
+ (s32)(tcptw->tw_ts_recent - tmp_opt.rcv_tsval) < 0))) {
+ u32 isn = tcptw->tw_snd_nxt + 65535 + 2;
if (isn == 0)
isn++;
TCP_SKB_CB(skb)->when = isn;
@@ -278,107 +256,57 @@ kill:
* Do not reschedule in the last case.
*/
if (paws_reject || th->ack)
- tcp_tw_schedule(tw, TCP_TIMEWAIT_LEN);
+ inet_twsk_schedule(tw, &tcp_death_row, TCP_TIMEWAIT_LEN,
+ TCP_TIMEWAIT_LEN);
/* Send ACK. Note, we do not put the bucket,
* it will be released by caller.
*/
return TCP_TW_ACK;
}
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
return TCP_TW_SUCCESS;
}
-/* Enter the time wait state. This is called with locally disabled BH.
- * Essentially we whip up a timewait bucket, copy the
- * relevant info into it from the SK, and mess with hash chains
- * and list linkage.
- */
-static void __tcp_tw_hashdance(struct sock *sk, struct tcp_tw_bucket *tw)
-{
- struct tcp_ehash_bucket *ehead = &tcp_ehash[sk->sk_hashent];
- struct tcp_bind_hashbucket *bhead;
-
- /* Step 1: Put TW into bind hash. Original socket stays there too.
- Note, that any socket with inet_sk(sk)->num != 0 MUST be bound in
- binding cache, even if it is closed.
- */
- bhead = &tcp_bhash[tcp_bhashfn(inet_sk(sk)->num)];
- spin_lock(&bhead->lock);
- tw->tw_tb = tcp_sk(sk)->bind_hash;
- BUG_TRAP(tcp_sk(sk)->bind_hash);
- tw_add_bind_node(tw, &tw->tw_tb->owners);
- spin_unlock(&bhead->lock);
-
- write_lock(&ehead->lock);
-
- /* Step 2: Remove SK from established hash. */
- if (__sk_del_node_init(sk))
- sock_prot_dec_use(sk->sk_prot);
-
- /* Step 3: Hash TW into TIMEWAIT half of established hash table. */
- tw_add_node(tw, &(ehead + tcp_ehash_size)->chain);
- atomic_inc(&tw->tw_refcnt);
-
- write_unlock(&ehead->lock);
-}
-
/*
* Move a socket to time-wait or dead fin-wait-2 state.
*/
void tcp_time_wait(struct sock *sk, int state, int timeo)
{
- struct tcp_tw_bucket *tw = NULL;
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_timewait_sock *tw = NULL;
+ const struct tcp_sock *tp = tcp_sk(sk);
int recycle_ok = 0;
- if (sysctl_tcp_tw_recycle && tp->rx_opt.ts_recent_stamp)
+ if (tcp_death_row.sysctl_tw_recycle && tp->rx_opt.ts_recent_stamp)
recycle_ok = tp->af_specific->remember_stamp(sk);
- if (tcp_tw_count < sysctl_tcp_max_tw_buckets)
- tw = kmem_cache_alloc(tcp_timewait_cachep, SLAB_ATOMIC);
-
- if(tw != NULL) {
- struct inet_sock *inet = inet_sk(sk);
- int rto = (tp->rto<<2) - (tp->rto>>1);
-
- /* Give us an identity. */
- tw->tw_daddr = inet->daddr;
- tw->tw_rcv_saddr = inet->rcv_saddr;
- tw->tw_bound_dev_if = sk->sk_bound_dev_if;
- tw->tw_num = inet->num;
- tw->tw_state = TCP_TIME_WAIT;
- tw->tw_substate = state;
- tw->tw_sport = inet->sport;
- tw->tw_dport = inet->dport;
- tw->tw_family = sk->sk_family;
- tw->tw_reuse = sk->sk_reuse;
- tw->tw_rcv_wscale = tp->rx_opt.rcv_wscale;
- atomic_set(&tw->tw_refcnt, 1);
+ if (tcp_death_row.tw_count < tcp_death_row.sysctl_max_tw_buckets)
+ tw = inet_twsk_alloc(sk, state);
- tw->tw_hashent = sk->sk_hashent;
- tw->tw_rcv_nxt = tp->rcv_nxt;
- tw->tw_snd_nxt = tp->snd_nxt;
- tw->tw_rcv_wnd = tcp_receive_window(tp);
- tw->tw_ts_recent = tp->rx_opt.ts_recent;
- tw->tw_ts_recent_stamp = tp->rx_opt.ts_recent_stamp;
- tw_dead_node_init(tw);
+ if (tw != NULL) {
+ struct tcp_timewait_sock *tcptw = tcp_twsk((struct sock *)tw);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
+
+ tw->tw_rcv_wscale = tp->rx_opt.rcv_wscale;
+ tcptw->tw_rcv_nxt = tp->rcv_nxt;
+ tcptw->tw_snd_nxt = tp->snd_nxt;
+ tcptw->tw_rcv_wnd = tcp_receive_window(tp);
+ tcptw->tw_ts_recent = tp->rx_opt.ts_recent;
+ tcptw->tw_ts_recent_stamp = tp->rx_opt.ts_recent_stamp;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
if (tw->tw_family == PF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
+ struct tcp6_timewait_sock *tcp6tw = tcp6_twsk((struct sock *)tw);
- ipv6_addr_copy(&tw->tw_v6_daddr, &np->daddr);
- ipv6_addr_copy(&tw->tw_v6_rcv_saddr, &np->rcv_saddr);
- tw->tw_v6_ipv6only = np->ipv6only;
- } else {
- memset(&tw->tw_v6_daddr, 0, sizeof(tw->tw_v6_daddr));
- memset(&tw->tw_v6_rcv_saddr, 0, sizeof(tw->tw_v6_rcv_saddr));
- tw->tw_v6_ipv6only = 0;
+ ipv6_addr_copy(&tcp6tw->tw_v6_daddr, &np->daddr);
+ ipv6_addr_copy(&tcp6tw->tw_v6_rcv_saddr, &np->rcv_saddr);
+ tw->tw_ipv6only = np->ipv6only;
}
#endif
/* Linkage updates. */
- __tcp_tw_hashdance(sk, tw);
+ __inet_twsk_hashdance(tw, sk, &tcp_hashinfo);
/* Get the TIME_WAIT timeout firing. */
if (timeo < rto)
@@ -392,8 +320,9 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
timeo = TCP_TIMEWAIT_LEN;
}
- tcp_tw_schedule(tw, timeo);
- tcp_tw_put(tw);
+ inet_twsk_schedule(tw, &tcp_death_row, timeo,
+ TCP_TIMEWAIT_LEN);
+ inet_twsk_put(tw);
} else {
/* Sorry, if we're out of memory, just CLOSE this
* socket up. We've got bigger problems than
@@ -407,277 +336,6 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
tcp_done(sk);
}
-/* Kill off TIME_WAIT sockets once their lifetime has expired. */
-static int tcp_tw_death_row_slot;
-
-static void tcp_twkill(unsigned long);
-
-/* TIME_WAIT reaping mechanism. */
-#define TCP_TWKILL_SLOTS 8 /* Please keep this a power of 2. */
-#define TCP_TWKILL_PERIOD (TCP_TIMEWAIT_LEN/TCP_TWKILL_SLOTS)
-
-#define TCP_TWKILL_QUOTA 100
-
-static struct hlist_head tcp_tw_death_row[TCP_TWKILL_SLOTS];
-static DEFINE_SPINLOCK(tw_death_lock);
-static struct timer_list tcp_tw_timer = TIMER_INITIALIZER(tcp_twkill, 0, 0);
-static void twkill_work(void *);
-static DECLARE_WORK(tcp_twkill_work, twkill_work, NULL);
-static u32 twkill_thread_slots;
-
-/* Returns non-zero if quota exceeded. */
-static int tcp_do_twkill_work(int slot, unsigned int quota)
-{
- struct tcp_tw_bucket *tw;
- struct hlist_node *node;
- unsigned int killed;
- int ret;
-
- /* NOTE: compare this to previous version where lock
- * was released after detaching chain. It was racy,
- * because tw buckets are scheduled in not serialized context
- * in 2.3 (with netfilter), and with softnet it is common, because
- * soft irqs are not sequenced.
- */
- killed = 0;
- ret = 0;
-rescan:
- tw_for_each_inmate(tw, node, &tcp_tw_death_row[slot]) {
- __tw_del_dead_node(tw);
- spin_unlock(&tw_death_lock);
- tcp_timewait_kill(tw);
- tcp_tw_put(tw);
- killed++;
- spin_lock(&tw_death_lock);
- if (killed > quota) {
- ret = 1;
- break;
- }
-
- /* While we dropped tw_death_lock, another cpu may have
- * killed off the next TW bucket in the list, therefore
- * do a fresh re-read of the hlist head node with the
- * lock reacquired. We still use the hlist traversal
- * macro in order to get the prefetches.
- */
- goto rescan;
- }
-
- tcp_tw_count -= killed;
- NET_ADD_STATS_BH(LINUX_MIB_TIMEWAITED, killed);
-
- return ret;
-}
-
-static void tcp_twkill(unsigned long dummy)
-{
- int need_timer, ret;
-
- spin_lock(&tw_death_lock);
-
- if (tcp_tw_count == 0)
- goto out;
-
- need_timer = 0;
- ret = tcp_do_twkill_work(tcp_tw_death_row_slot, TCP_TWKILL_QUOTA);
- if (ret) {
- twkill_thread_slots |= (1 << tcp_tw_death_row_slot);
- mb();
- schedule_work(&tcp_twkill_work);
- need_timer = 1;
- } else {
- /* We purged the entire slot, anything left? */
- if (tcp_tw_count)
- need_timer = 1;
- }
- tcp_tw_death_row_slot =
- ((tcp_tw_death_row_slot + 1) & (TCP_TWKILL_SLOTS - 1));
- if (need_timer)
- mod_timer(&tcp_tw_timer, jiffies + TCP_TWKILL_PERIOD);
-out:
- spin_unlock(&tw_death_lock);
-}
-
-extern void twkill_slots_invalid(void);
-
-static void twkill_work(void *dummy)
-{
- int i;
-
- if ((TCP_TWKILL_SLOTS - 1) > (sizeof(twkill_thread_slots) * 8))
- twkill_slots_invalid();
-
- while (twkill_thread_slots) {
- spin_lock_bh(&tw_death_lock);
- for (i = 0; i < TCP_TWKILL_SLOTS; i++) {
- if (!(twkill_thread_slots & (1 << i)))
- continue;
-
- while (tcp_do_twkill_work(i, TCP_TWKILL_QUOTA) != 0) {
- if (need_resched()) {
- spin_unlock_bh(&tw_death_lock);
- schedule();
- spin_lock_bh(&tw_death_lock);
- }
- }
-
- twkill_thread_slots &= ~(1 << i);
- }
- spin_unlock_bh(&tw_death_lock);
- }
-}
-
-/* These are always called from BH context. See callers in
- * tcp_input.c to verify this.
- */
-
-/* This is for handling early-kills of TIME_WAIT sockets. */
-void tcp_tw_deschedule(struct tcp_tw_bucket *tw)
-{
- spin_lock(&tw_death_lock);
- if (tw_del_dead_node(tw)) {
- tcp_tw_put(tw);
- if (--tcp_tw_count == 0)
- del_timer(&tcp_tw_timer);
- }
- spin_unlock(&tw_death_lock);
- tcp_timewait_kill(tw);
-}
-
-/* Short-time timewait calendar */
-
-static int tcp_twcal_hand = -1;
-static int tcp_twcal_jiffie;
-static void tcp_twcal_tick(unsigned long);
-static struct timer_list tcp_twcal_timer =
- TIMER_INITIALIZER(tcp_twcal_tick, 0, 0);
-static struct hlist_head tcp_twcal_row[TCP_TW_RECYCLE_SLOTS];
-
-static void tcp_tw_schedule(struct tcp_tw_bucket *tw, int timeo)
-{
- struct hlist_head *list;
- int slot;
-
- /* timeout := RTO * 3.5
- *
- * 3.5 = 1+2+0.5 to wait for two retransmits.
- *
- * RATIONALE: if FIN arrived and we entered TIME-WAIT state,
- * our ACK acking that FIN can be lost. If N subsequent retransmitted
- * FINs (or previous seqments) are lost (probability of such event
- * is p^(N+1), where p is probability to lose single packet and
- * time to detect the loss is about RTO*(2^N - 1) with exponential
- * backoff). Normal timewait length is calculated so, that we
- * waited at least for one retransmitted FIN (maximal RTO is 120sec).
- * [ BTW Linux. following BSD, violates this requirement waiting
- * only for 60sec, we should wait at least for 240 secs.
- * Well, 240 consumes too much of resources 8)
- * ]
- * This interval is not reduced to catch old duplicate and
- * responces to our wandering segments living for two MSLs.
- * However, if we use PAWS to detect
- * old duplicates, we can reduce the interval to bounds required
- * by RTO, rather than MSL. So, if peer understands PAWS, we
- * kill tw bucket after 3.5*RTO (it is important that this number
- * is greater than TS tick!) and detect old duplicates with help
- * of PAWS.
- */
- slot = (timeo + (1<<TCP_TW_RECYCLE_TICK) - 1) >> TCP_TW_RECYCLE_TICK;
-
- spin_lock(&tw_death_lock);
-
- /* Unlink it, if it was scheduled */
- if (tw_del_dead_node(tw))
- tcp_tw_count--;
- else
- atomic_inc(&tw->tw_refcnt);
-
- if (slot >= TCP_TW_RECYCLE_SLOTS) {
- /* Schedule to slow timer */
- if (timeo >= TCP_TIMEWAIT_LEN) {
- slot = TCP_TWKILL_SLOTS-1;
- } else {
- slot = (timeo + TCP_TWKILL_PERIOD-1) / TCP_TWKILL_PERIOD;
- if (slot >= TCP_TWKILL_SLOTS)
- slot = TCP_TWKILL_SLOTS-1;
- }
- tw->tw_ttd = jiffies + timeo;
- slot = (tcp_tw_death_row_slot + slot) & (TCP_TWKILL_SLOTS - 1);
- list = &tcp_tw_death_row[slot];
- } else {
- tw->tw_ttd = jiffies + (slot << TCP_TW_RECYCLE_TICK);
-
- if (tcp_twcal_hand < 0) {
- tcp_twcal_hand = 0;
- tcp_twcal_jiffie = jiffies;
- tcp_twcal_timer.expires = tcp_twcal_jiffie + (slot<<TCP_TW_RECYCLE_TICK);
- add_timer(&tcp_twcal_timer);
- } else {
- if (time_after(tcp_twcal_timer.expires, jiffies + (slot<<TCP_TW_RECYCLE_TICK)))
- mod_timer(&tcp_twcal_timer, jiffies + (slot<<TCP_TW_RECYCLE_TICK));
- slot = (tcp_twcal_hand + slot)&(TCP_TW_RECYCLE_SLOTS-1);
- }
- list = &tcp_twcal_row[slot];
- }
-
- hlist_add_head(&tw->tw_death_node, list);
-
- if (tcp_tw_count++ == 0)
- mod_timer(&tcp_tw_timer, jiffies+TCP_TWKILL_PERIOD);
- spin_unlock(&tw_death_lock);
-}
-
-void tcp_twcal_tick(unsigned long dummy)
-{
- int n, slot;
- unsigned long j;
- unsigned long now = jiffies;
- int killed = 0;
- int adv = 0;
-
- spin_lock(&tw_death_lock);
- if (tcp_twcal_hand < 0)
- goto out;
-
- slot = tcp_twcal_hand;
- j = tcp_twcal_jiffie;
-
- for (n=0; n<TCP_TW_RECYCLE_SLOTS; n++) {
- if (time_before_eq(j, now)) {
- struct hlist_node *node, *safe;
- struct tcp_tw_bucket *tw;
-
- tw_for_each_inmate_safe(tw, node, safe,
- &tcp_twcal_row[slot]) {
- __tw_del_dead_node(tw);
- tcp_timewait_kill(tw);
- tcp_tw_put(tw);
- killed++;
- }
- } else {
- if (!adv) {
- adv = 1;
- tcp_twcal_jiffie = j;
- tcp_twcal_hand = slot;
- }
-
- if (!hlist_empty(&tcp_twcal_row[slot])) {
- mod_timer(&tcp_twcal_timer, j);
- goto out;
- }
- }
- j += (1<<TCP_TW_RECYCLE_TICK);
- slot = (slot+1)&(TCP_TW_RECYCLE_SLOTS-1);
- }
- tcp_twcal_hand = -1;
-
-out:
- if ((tcp_tw_count -= killed) == 0)
- del_timer(&tcp_tw_timer);
- NET_ADD_STATS_BH(LINUX_MIB_TIMEWAITKILLED, killed);
- spin_unlock(&tw_death_lock);
-}
-
/* This is not only more efficient than what we used to do, it eliminates
* a lot of code duplication between IPv4/IPv6 SYN recv processing. -DaveM
*
@@ -686,75 +344,27 @@ out:
*/
struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req, struct sk_buff *skb)
{
- /* allocate the newsk from the same slab of the master sock,
- * if not, at sk_free time we'll try to free it from the wrong
- * slabcache (i.e. is it TCPv4 or v6?), this is handled thru sk->sk_prot -acme */
- struct sock *newsk = sk_alloc(PF_INET, GFP_ATOMIC, sk->sk_prot, 0);
+ struct sock *newsk = inet_csk_clone(sk, req, GFP_ATOMIC);
- if(newsk != NULL) {
- struct inet_request_sock *ireq = inet_rsk(req);
+ if (newsk != NULL) {
+ const struct inet_request_sock *ireq = inet_rsk(req);
struct tcp_request_sock *treq = tcp_rsk(req);
+ struct inet_connection_sock *newicsk = inet_csk(sk);
struct tcp_sock *newtp;
- struct sk_filter *filter;
-
- memcpy(newsk, sk, sizeof(struct tcp_sock));
- newsk->sk_state = TCP_SYN_RECV;
-
- /* SANITY */
- sk_node_init(&newsk->sk_node);
- tcp_sk(newsk)->bind_hash = NULL;
-
- /* Clone the TCP header template */
- inet_sk(newsk)->dport = ireq->rmt_port;
-
- sock_lock_init(newsk);
- bh_lock_sock(newsk);
-
- rwlock_init(&newsk->sk_dst_lock);
- atomic_set(&newsk->sk_rmem_alloc, 0);
- skb_queue_head_init(&newsk->sk_receive_queue);
- atomic_set(&newsk->sk_wmem_alloc, 0);
- skb_queue_head_init(&newsk->sk_write_queue);
- atomic_set(&newsk->sk_omem_alloc, 0);
- newsk->sk_wmem_queued = 0;
- newsk->sk_forward_alloc = 0;
-
- sock_reset_flag(newsk, SOCK_DONE);
- newsk->sk_userlocks = sk->sk_userlocks & ~SOCK_BINDPORT_LOCK;
- newsk->sk_backlog.head = newsk->sk_backlog.tail = NULL;
- newsk->sk_send_head = NULL;
- rwlock_init(&newsk->sk_callback_lock);
- skb_queue_head_init(&newsk->sk_error_queue);
- newsk->sk_write_space = sk_stream_write_space;
-
- if ((filter = newsk->sk_filter) != NULL)
- sk_filter_charge(newsk, filter);
-
- if (unlikely(xfrm_sk_clone_policy(newsk))) {
- /* It is still raw copy of parent, so invalidate
- * destructor and make plain sk_free() */
- newsk->sk_destruct = NULL;
- sk_free(newsk);
- return NULL;
- }
/* Now setup tcp_sock */
newtp = tcp_sk(newsk);
newtp->pred_flags = 0;
newtp->rcv_nxt = treq->rcv_isn + 1;
- newtp->snd_nxt = treq->snt_isn + 1;
- newtp->snd_una = treq->snt_isn + 1;
- newtp->snd_sml = treq->snt_isn + 1;
+ newtp->snd_nxt = newtp->snd_una = newtp->snd_sml = treq->snt_isn + 1;
tcp_prequeue_init(newtp);
tcp_init_wl(newtp, treq->snt_isn, treq->rcv_isn);
- newtp->retransmits = 0;
- newtp->backoff = 0;
newtp->srtt = 0;
newtp->mdev = TCP_TIMEOUT_INIT;
- newtp->rto = TCP_TIMEOUT_INIT;
+ newicsk->icsk_rto = TCP_TIMEOUT_INIT;
newtp->packets_out = 0;
newtp->left_out = 0;
@@ -774,9 +384,9 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newtp->frto_counter = 0;
newtp->frto_highmark = 0;
- newtp->ca_ops = &tcp_reno;
+ newicsk->icsk_ca_ops = &tcp_reno;
- tcp_set_ca_state(newtp, TCP_CA_Open);
+ tcp_set_ca_state(newsk, TCP_CA_Open);
tcp_init_xmit_timers(newsk);
skb_queue_head_init(&newtp->out_of_order_queue);
newtp->rcv_wup = treq->rcv_isn + 1;
@@ -789,26 +399,12 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newtp->rx_opt.dsack = 0;
newtp->rx_opt.eff_sacks = 0;
- newtp->probes_out = 0;
newtp->rx_opt.num_sacks = 0;
newtp->urg_data = 0;
- /* Deinitialize accept_queue to trap illegal accesses. */
- memset(&newtp->accept_queue, 0, sizeof(newtp->accept_queue));
-
- /* Back to base struct sock members. */
- newsk->sk_err = 0;
- newsk->sk_priority = 0;
- atomic_set(&newsk->sk_refcnt, 2);
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet_sock_nr);
-#endif
- atomic_inc(&tcp_sockets_allocated);
if (sock_flag(newsk, SOCK_KEEPOPEN))
- tcp_reset_keepalive_timer(newsk,
- keepalive_time_when(newtp));
- newsk->sk_socket = NULL;
- newsk->sk_sleep = NULL;
+ inet_csk_reset_keepalive_timer(newsk,
+ keepalive_time_when(newtp));
newtp->rx_opt.tstamp_ok = ireq->tstamp_ok;
if((newtp->rx_opt.sack_ok = ireq->sack_ok) != 0) {
@@ -838,7 +434,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newtp->tcp_header_len = sizeof(struct tcphdr);
}
if (skb->len >= TCP_MIN_RCVMSS+newtp->tcp_header_len)
- newtp->ack.last_seg_size = skb->len-newtp->tcp_header_len;
+ newicsk->icsk_ack.last_seg_size = skb->len - newtp->tcp_header_len;
newtp->rx_opt.mss_clamp = req->mss;
TCP_ECN_openreq_child(newtp, req);
if (newtp->ecn_flags&TCP_ECN_OK)
@@ -934,9 +530,10 @@ struct sock *tcp_check_req(struct sock *sk,struct sk_buff *skb,
does sequence test, SYN is truncated, and thus we consider
it a bare ACK.
- If tp->defer_accept, we silently drop this bare ACK. Otherwise,
- we create an established connection. Both ends (listening sockets)
- accept the new incoming connection and try to talk to each other. 8-)
+ If icsk->icsk_accept_queue.rskq_defer_accept, we silently drop this
+ bare ACK. Otherwise, we create an established connection. Both
+ ends (listening sockets) accept the new incoming connection and try
+ to talk to each other. 8-)
Note: This case is both harmless, and rare. Possibility is about the
same as us discovering intelligent life on another plant tomorrow.
@@ -1003,7 +600,8 @@ struct sock *tcp_check_req(struct sock *sk,struct sk_buff *skb,
return NULL;
/* If TCP_DEFER_ACCEPT is set, drop bare ACK. */
- if (tp->defer_accept && TCP_SKB_CB(skb)->end_seq == tcp_rsk(req)->rcv_isn + 1) {
+ if (inet_csk(sk)->icsk_accept_queue.rskq_defer_accept &&
+ TCP_SKB_CB(skb)->end_seq == tcp_rsk(req)->rcv_isn + 1) {
inet_rsk(req)->acked = 1;
return NULL;
}
@@ -1018,10 +616,10 @@ struct sock *tcp_check_req(struct sock *sk,struct sk_buff *skb,
if (child == NULL)
goto listen_overflow;
- tcp_synq_unlink(tp, req, prev);
- tcp_synq_removed(sk, req);
+ inet_csk_reqsk_queue_unlink(sk, req, prev);
+ inet_csk_reqsk_queue_removed(sk, req);
- tcp_acceptq_queue(sk, req, child);
+ inet_csk_reqsk_queue_add(sk, req, child);
return child;
listen_overflow:
@@ -1035,7 +633,7 @@ struct sock *tcp_check_req(struct sock *sk,struct sk_buff *skb,
if (!(flg & TCP_FLAG_RST))
req->rsk_ops->send_reset(skb);
- tcp_synq_drop(sk, req, prev);
+ inet_csk_reqsk_queue_drop(sk, req, prev);
return NULL;
}
@@ -1074,4 +672,3 @@ EXPORT_SYMBOL(tcp_check_req);
EXPORT_SYMBOL(tcp_child_process);
EXPORT_SYMBOL(tcp_create_openreq_child);
EXPORT_SYMBOL(tcp_timewait_state_process);
-EXPORT_SYMBOL(tcp_tw_deschedule);
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index dd30dd137b74..75b68116682a 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -105,18 +105,19 @@ static __u16 tcp_advertise_mss(struct sock *sk)
/* RFC2861. Reset CWND after idle period longer RTO to "restart window".
* This is the first part of cwnd validation mechanism. */
-static void tcp_cwnd_restart(struct tcp_sock *tp, struct dst_entry *dst)
+static void tcp_cwnd_restart(struct sock *sk, struct dst_entry *dst)
{
+ struct tcp_sock *tp = tcp_sk(sk);
s32 delta = tcp_time_stamp - tp->lsndtime;
u32 restart_cwnd = tcp_init_cwnd(tp, dst);
u32 cwnd = tp->snd_cwnd;
- tcp_ca_event(tp, CA_EVENT_CWND_RESTART);
+ tcp_ca_event(sk, CA_EVENT_CWND_RESTART);
- tp->snd_ssthresh = tcp_current_ssthresh(tp);
+ tp->snd_ssthresh = tcp_current_ssthresh(sk);
restart_cwnd = min(restart_cwnd, cwnd);
- while ((delta -= tp->rto) > 0 && cwnd > restart_cwnd)
+ while ((delta -= inet_csk(sk)->icsk_rto) > 0 && cwnd > restart_cwnd)
cwnd >>= 1;
tp->snd_cwnd = max(cwnd, restart_cwnd);
tp->snd_cwnd_stamp = tcp_time_stamp;
@@ -126,26 +127,25 @@ static void tcp_cwnd_restart(struct tcp_sock *tp, struct dst_entry *dst)
static inline void tcp_event_data_sent(struct tcp_sock *tp,
struct sk_buff *skb, struct sock *sk)
{
- u32 now = tcp_time_stamp;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ const u32 now = tcp_time_stamp;
- if (!tp->packets_out && (s32)(now - tp->lsndtime) > tp->rto)
- tcp_cwnd_restart(tp, __sk_dst_get(sk));
+ if (!tp->packets_out && (s32)(now - tp->lsndtime) > icsk->icsk_rto)
+ tcp_cwnd_restart(sk, __sk_dst_get(sk));
tp->lsndtime = now;
/* If it is a reply for ato after last received
* packet, enter pingpong mode.
*/
- if ((u32)(now - tp->ack.lrcvtime) < tp->ack.ato)
- tp->ack.pingpong = 1;
+ if ((u32)(now - icsk->icsk_ack.lrcvtime) < icsk->icsk_ack.ato)
+ icsk->icsk_ack.pingpong = 1;
}
static __inline__ void tcp_event_ack_sent(struct sock *sk, unsigned int pkts)
{
- struct tcp_sock *tp = tcp_sk(sk);
-
- tcp_dec_quickack_mode(tp, pkts);
- tcp_clear_xmit_timer(sk, TCP_TIME_DACK);
+ tcp_dec_quickack_mode(sk, pkts);
+ inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
}
/* Determine a window scaling and initial window to offer.
@@ -265,6 +265,7 @@ static __inline__ u16 tcp_select_window(struct sock *sk)
static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
{
if (skb != NULL) {
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_sock *inet = inet_sk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct tcp_skb_cb *tcb = TCP_SKB_CB(skb);
@@ -280,8 +281,8 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
#define SYSCTL_FLAG_SACK 0x4
/* If congestion control is doing timestamping */
- if (tp->ca_ops->rtt_sample)
- do_gettimeofday(&skb->stamp);
+ if (icsk->icsk_ca_ops->rtt_sample)
+ __net_timestamp(skb);
sysctl_flags = 0;
if (tcb->flags & TCPCB_FLAG_SYN) {
@@ -308,7 +309,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
}
if (tcp_packets_in_flight(tp) == 0)
- tcp_ca_event(tp, CA_EVENT_TX_START);
+ tcp_ca_event(sk, CA_EVENT_TX_START);
th = (struct tcphdr *) skb_push(skb, tcp_header_size);
skb->h.th = th;
@@ -366,7 +367,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb)
if (err <= 0)
return err;
- tcp_enter_cwr(tp);
+ tcp_enter_cwr(sk);
/* NET_XMIT_CN is special. It does not guarantee,
* that this packet is lost. It tells that device
@@ -482,7 +483,7 @@ static int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned
* skbs, which it never sent before. --ANK
*/
TCP_SKB_CB(buff)->when = TCP_SKB_CB(skb)->when;
- buff->stamp = skb->stamp;
+ buff->tstamp = skb->tstamp;
if (TCP_SKB_CB(skb)->sacked & TCPCB_LOST) {
tp->lost_out -= tcp_skb_pcount(skb);
@@ -505,7 +506,7 @@ static int tcp_fragment(struct sock *sk, struct sk_buff *skb, u32 len, unsigned
/* Link BUFF into the send queue. */
skb_header_release(buff);
- __skb_append(skb, buff);
+ __skb_append(skb, buff, &sk->sk_write_queue);
return 0;
}
@@ -696,7 +697,7 @@ static inline void tcp_cwnd_validate(struct sock *sk, struct tcp_sock *tp)
if (tp->packets_out > tp->snd_cwnd_used)
tp->snd_cwnd_used = tp->packets_out;
- if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= tp->rto)
+ if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= inet_csk(sk)->icsk_rto)
tcp_cwnd_application_limited(sk);
}
}
@@ -893,7 +894,7 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
/* Link BUFF into the send queue. */
skb_header_release(buff);
- __skb_append(skb, buff);
+ __skb_append(skb, buff, &sk->sk_write_queue);
return 0;
}
@@ -905,12 +906,13 @@ static int tso_fragment(struct sock *sk, struct sk_buff *skb, unsigned int len,
*/
static int tcp_tso_should_defer(struct sock *sk, struct tcp_sock *tp, struct sk_buff *skb)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
u32 send_win, cong_win, limit, in_flight;
if (TCP_SKB_CB(skb)->flags & TCPCB_FLAG_FIN)
return 0;
- if (tp->ca_state != TCP_CA_Open)
+ if (icsk->icsk_ca_state != TCP_CA_Open)
return 0;
in_flight = tcp_packets_in_flight(tp);
@@ -1147,6 +1149,7 @@ void tcp_push_one(struct sock *sk, unsigned int mss_now)
*/
u32 __tcp_select_window(struct sock *sk)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
/* MSS for the peer's data. Previous verions used mss_clamp
* here. I don't know if the value based on our guesses
@@ -1154,7 +1157,7 @@ u32 __tcp_select_window(struct sock *sk)
* but may be worse for the performance because of rcv_mss
* fluctuations. --SAW 1998/11/1
*/
- int mss = tp->ack.rcv_mss;
+ int mss = icsk->icsk_ack.rcv_mss;
int free_space = tcp_space(sk);
int full_space = min_t(int, tp->window_clamp, tcp_full_space(sk));
int window;
@@ -1163,7 +1166,7 @@ u32 __tcp_select_window(struct sock *sk)
mss = full_space;
if (free_space < full_space/2) {
- tp->ack.quick = 0;
+ icsk->icsk_ack.quick = 0;
if (tcp_memory_pressure)
tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U*tp->advmss);
@@ -1238,7 +1241,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
tcp_skb_pcount(next_skb) != 1);
/* Ok. We will be able to collapse the packet. */
- __skb_unlink(next_skb, next_skb->list);
+ __skb_unlink(next_skb, &sk->sk_write_queue);
memcpy(skb_put(skb, next_skb_size), next_skb->data, next_skb_size);
@@ -1286,6 +1289,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m
*/
void tcp_simple_retransmit(struct sock *sk)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
unsigned int mss = tcp_current_mss(sk, 0);
@@ -1316,12 +1320,12 @@ void tcp_simple_retransmit(struct sock *sk)
* in network, but units changed and effective
* cwnd/ssthresh really reduced now.
*/
- if (tp->ca_state != TCP_CA_Loss) {
+ if (icsk->icsk_ca_state != TCP_CA_Loss) {
tp->high_seq = tp->snd_nxt;
- tp->snd_ssthresh = tcp_current_ssthresh(tp);
+ tp->snd_ssthresh = tcp_current_ssthresh(sk);
tp->prior_ssthresh = 0;
tp->undo_marker = 0;
- tcp_set_ca_state(tp, TCP_CA_Loss);
+ tcp_set_ca_state(sk, TCP_CA_Loss);
}
tcp_xmit_retransmit_queue(sk);
}
@@ -1461,6 +1465,7 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
*/
void tcp_xmit_retransmit_queue(struct sock *sk)
{
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *skb;
int packet_cnt = tp->lost_out;
@@ -1484,14 +1489,16 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
if (!(sacked&(TCPCB_SACKED_ACKED|TCPCB_SACKED_RETRANS))) {
if (tcp_retransmit_skb(sk, skb))
return;
- if (tp->ca_state != TCP_CA_Loss)
+ if (icsk->icsk_ca_state != TCP_CA_Loss)
NET_INC_STATS_BH(LINUX_MIB_TCPFASTRETRANS);
else
NET_INC_STATS_BH(LINUX_MIB_TCPSLOWSTARTRETRANS);
if (skb ==
skb_peek(&sk->sk_write_queue))
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ inet_csk(sk)->icsk_rto,
+ TCP_RTO_MAX);
}
packet_cnt -= tcp_skb_pcount(skb);
@@ -1504,7 +1511,7 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
/* OK, demanded retransmission is finished. */
/* Forward retransmissions are possible only during Recovery. */
- if (tp->ca_state != TCP_CA_Recovery)
+ if (icsk->icsk_ca_state != TCP_CA_Recovery)
return;
/* No forward retransmissions in Reno are possible. */
@@ -1544,7 +1551,9 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
break;
if (skb == skb_peek(&sk->sk_write_queue))
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ inet_csk(sk)->icsk_rto,
+ TCP_RTO_MAX);
NET_INC_STATS_BH(LINUX_MIB_TCPFORWARDRETRANS);
}
@@ -1573,7 +1582,7 @@ void tcp_send_fin(struct sock *sk)
} else {
/* Socket is locked, keep trying until memory is available. */
for (;;) {
- skb = alloc_skb(MAX_TCP_HEADER, GFP_KERNEL);
+ skb = alloc_skb_fclone(MAX_TCP_HEADER, GFP_KERNEL);
if (skb)
break;
yield();
@@ -1780,8 +1789,8 @@ static inline void tcp_connect_init(struct sock *sk)
tp->rcv_wup = 0;
tp->copied_seq = 0;
- tp->rto = TCP_TIMEOUT_INIT;
- tp->retransmits = 0;
+ inet_csk(sk)->icsk_rto = TCP_TIMEOUT_INIT;
+ inet_csk(sk)->icsk_retransmits = 0;
tcp_clear_retrans(tp);
}
@@ -1795,7 +1804,7 @@ int tcp_connect(struct sock *sk)
tcp_connect_init(sk);
- buff = alloc_skb(MAX_TCP_HEADER + 15, sk->sk_allocation);
+ buff = alloc_skb_fclone(MAX_TCP_HEADER + 15, sk->sk_allocation);
if (unlikely(buff == NULL))
return -ENOBUFS;
@@ -1824,7 +1833,8 @@ int tcp_connect(struct sock *sk)
TCP_INC_STATS(TCP_MIB_ACTIVEOPENS);
/* Timer for repeating the SYN until an answer. */
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ inet_csk(sk)->icsk_rto, TCP_RTO_MAX);
return 0;
}
@@ -1834,20 +1844,21 @@ int tcp_connect(struct sock *sk)
*/
void tcp_send_delayed_ack(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
- int ato = tp->ack.ato;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ int ato = icsk->icsk_ack.ato;
unsigned long timeout;
if (ato > TCP_DELACK_MIN) {
+ const struct tcp_sock *tp = tcp_sk(sk);
int max_ato = HZ/2;
- if (tp->ack.pingpong || (tp->ack.pending&TCP_ACK_PUSHED))
+ if (icsk->icsk_ack.pingpong || (icsk->icsk_ack.pending & ICSK_ACK_PUSHED))
max_ato = TCP_DELACK_MAX;
/* Slow path, intersegment interval is "high". */
/* If some rtt estimate is known, use it to bound delayed ack.
- * Do not use tp->rto here, use results of rtt measurements
+ * Do not use inet_csk(sk)->icsk_rto here, use results of rtt measurements
* directly.
*/
if (tp->srtt) {
@@ -1864,21 +1875,22 @@ void tcp_send_delayed_ack(struct sock *sk)
timeout = jiffies + ato;
/* Use new timeout only if there wasn't a older one earlier. */
- if (tp->ack.pending&TCP_ACK_TIMER) {
+ if (icsk->icsk_ack.pending & ICSK_ACK_TIMER) {
/* If delack timer was blocked or is about to expire,
* send ACK now.
*/
- if (tp->ack.blocked || time_before_eq(tp->ack.timeout, jiffies+(ato>>2))) {
+ if (icsk->icsk_ack.blocked ||
+ time_before_eq(icsk->icsk_ack.timeout, jiffies + (ato >> 2))) {
tcp_send_ack(sk);
return;
}
- if (!time_before(timeout, tp->ack.timeout))
- timeout = tp->ack.timeout;
+ if (!time_before(timeout, icsk->icsk_ack.timeout))
+ timeout = icsk->icsk_ack.timeout;
}
- tp->ack.pending |= TCP_ACK_SCHED|TCP_ACK_TIMER;
- tp->ack.timeout = timeout;
- sk_reset_timer(sk, &tp->delack_timer, timeout);
+ icsk->icsk_ack.pending |= ICSK_ACK_SCHED | ICSK_ACK_TIMER;
+ icsk->icsk_ack.timeout = timeout;
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, timeout);
}
/* This routine sends an ack and also updates the window. */
@@ -1895,9 +1907,10 @@ void tcp_send_ack(struct sock *sk)
*/
buff = alloc_skb(MAX_TCP_HEADER, GFP_ATOMIC);
if (buff == NULL) {
- tcp_schedule_ack(tp);
- tp->ack.ato = TCP_ATO_MIN;
- tcp_reset_xmit_timer(sk, TCP_TIME_DACK, TCP_DELACK_MAX);
+ inet_csk_schedule_ack(sk);
+ inet_csk(sk)->icsk_ack.ato = TCP_ATO_MIN;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ TCP_DELACK_MAX, TCP_RTO_MAX);
return;
}
@@ -2011,6 +2024,7 @@ int tcp_write_wakeup(struct sock *sk)
*/
void tcp_send_probe0(struct sock *sk)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
int err;
@@ -2018,28 +2032,31 @@ void tcp_send_probe0(struct sock *sk)
if (tp->packets_out || !sk->sk_send_head) {
/* Cancel probe timer, if it is not required. */
- tp->probes_out = 0;
- tp->backoff = 0;
+ icsk->icsk_probes_out = 0;
+ icsk->icsk_backoff = 0;
return;
}
if (err <= 0) {
- if (tp->backoff < sysctl_tcp_retries2)
- tp->backoff++;
- tp->probes_out++;
- tcp_reset_xmit_timer (sk, TCP_TIME_PROBE0,
- min(tp->rto << tp->backoff, TCP_RTO_MAX));
+ if (icsk->icsk_backoff < sysctl_tcp_retries2)
+ icsk->icsk_backoff++;
+ icsk->icsk_probes_out++;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
+ min(icsk->icsk_rto << icsk->icsk_backoff, TCP_RTO_MAX),
+ TCP_RTO_MAX);
} else {
/* If packet was not sent due to local congestion,
- * do not backoff and do not remember probes_out.
+ * do not backoff and do not remember icsk_probes_out.
* Let local senders to fight for local resources.
*
* Use accumulated backoff yet.
*/
- if (!tp->probes_out)
- tp->probes_out=1;
- tcp_reset_xmit_timer (sk, TCP_TIME_PROBE0,
- min(tp->rto << tp->backoff, TCP_RESOURCE_PROBE_INTERVAL));
+ if (!icsk->icsk_probes_out)
+ icsk->icsk_probes_out = 1;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_PROBE0,
+ min(icsk->icsk_rto << icsk->icsk_backoff,
+ TCP_RESOURCE_PROBE_INTERVAL),
+ TCP_RTO_MAX);
}
}
diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c
index 70e108e15c71..327770bf5522 100644
--- a/net/ipv4/tcp_scalable.c
+++ b/net/ipv4/tcp_scalable.c
@@ -16,9 +16,10 @@
#define TCP_SCALABLE_AI_CNT 50U
#define TCP_SCALABLE_MD_SCALE 3
-static void tcp_scalable_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
+static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
u32 in_flight, int flag)
{
+ struct tcp_sock *tp = tcp_sk(sk);
if (in_flight < tp->snd_cwnd)
return;
@@ -35,8 +36,9 @@ static void tcp_scalable_cong_avoid(struct tcp_sock *tp, u32 ack, u32 rtt,
tp->snd_cwnd_stamp = tcp_time_stamp;
}
-static u32 tcp_scalable_ssthresh(struct tcp_sock *tp)
+static u32 tcp_scalable_ssthresh(struct sock *sk)
{
+ const struct tcp_sock *tp = tcp_sk(sk);
return max(tp->snd_cwnd - (tp->snd_cwnd>>TCP_SCALABLE_MD_SCALE), 2U);
}
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 0084227438c2..415ee47ac1c5 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -36,49 +36,13 @@ static void tcp_write_timer(unsigned long);
static void tcp_delack_timer(unsigned long);
static void tcp_keepalive_timer (unsigned long data);
-#ifdef TCP_DEBUG
-const char tcp_timer_bug_msg[] = KERN_DEBUG "tcpbug: unknown timer value\n";
-EXPORT_SYMBOL(tcp_timer_bug_msg);
-#endif
-
-/*
- * Using different timers for retransmit, delayed acks and probes
- * We may wish use just one timer maintaining a list of expire jiffies
- * to optimize.
- */
-
void tcp_init_xmit_timers(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
-
- init_timer(&tp->retransmit_timer);
- tp->retransmit_timer.function=&tcp_write_timer;
- tp->retransmit_timer.data = (unsigned long) sk;
- tp->pending = 0;
-
- init_timer(&tp->delack_timer);
- tp->delack_timer.function=&tcp_delack_timer;
- tp->delack_timer.data = (unsigned long) sk;
- tp->ack.pending = 0;
-
- init_timer(&sk->sk_timer);
- sk->sk_timer.function = &tcp_keepalive_timer;
- sk->sk_timer.data = (unsigned long)sk;
+ inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer,
+ &tcp_keepalive_timer);
}
-void tcp_clear_xmit_timers(struct sock *sk)
-{
- struct tcp_sock *tp = tcp_sk(sk);
-
- tp->pending = 0;
- sk_stop_timer(sk, &tp->retransmit_timer);
-
- tp->ack.pending = 0;
- tp->ack.blocked = 0;
- sk_stop_timer(sk, &tp->delack_timer);
-
- sk_stop_timer(sk, &sk->sk_timer);
-}
+EXPORT_SYMBOL(tcp_init_xmit_timers);
static void tcp_write_err(struct sock *sk)
{
@@ -155,15 +119,15 @@ static int tcp_orphan_retries(struct sock *sk, int alive)
/* A write timeout has occurred. Process the after effects. */
static int tcp_write_timeout(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
int retry_until;
if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
- if (tp->retransmits)
+ if (icsk->icsk_retransmits)
dst_negative_advice(&sk->sk_dst_cache);
- retry_until = tp->syn_retries ? : sysctl_tcp_syn_retries;
+ retry_until = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
} else {
- if (tp->retransmits >= sysctl_tcp_retries1) {
+ if (icsk->icsk_retransmits >= sysctl_tcp_retries1) {
/* NOTE. draft-ietf-tcpimpl-pmtud-01.txt requires pmtu black
hole detection. :-(
@@ -189,16 +153,16 @@ static int tcp_write_timeout(struct sock *sk)
retry_until = sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {
- int alive = (tp->rto < TCP_RTO_MAX);
+ const int alive = (icsk->icsk_rto < TCP_RTO_MAX);
retry_until = tcp_orphan_retries(sk, alive);
- if (tcp_out_of_resources(sk, alive || tp->retransmits < retry_until))
+ if (tcp_out_of_resources(sk, alive || icsk->icsk_retransmits < retry_until))
return 1;
}
}
- if (tp->retransmits >= retry_until) {
+ if (icsk->icsk_retransmits >= retry_until) {
/* Has it gone just too far? */
tcp_write_err(sk);
return 1;
@@ -210,26 +174,27 @@ static void tcp_delack_timer(unsigned long data)
{
struct sock *sk = (struct sock*)data;
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
/* Try again later. */
- tp->ack.blocked = 1;
+ icsk->icsk_ack.blocked = 1;
NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKLOCKED);
- sk_reset_timer(sk, &tp->delack_timer, jiffies + TCP_DELACK_MIN);
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, jiffies + TCP_DELACK_MIN);
goto out_unlock;
}
sk_stream_mem_reclaim(sk);
- if (sk->sk_state == TCP_CLOSE || !(tp->ack.pending & TCP_ACK_TIMER))
+ if (sk->sk_state == TCP_CLOSE || !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))
goto out;
- if (time_after(tp->ack.timeout, jiffies)) {
- sk_reset_timer(sk, &tp->delack_timer, tp->ack.timeout);
+ if (time_after(icsk->icsk_ack.timeout, jiffies)) {
+ sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
goto out;
}
- tp->ack.pending &= ~TCP_ACK_TIMER;
+ icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER;
if (!skb_queue_empty(&tp->ucopy.prequeue)) {
struct sk_buff *skb;
@@ -242,16 +207,16 @@ static void tcp_delack_timer(unsigned long data)
tp->ucopy.memory = 0;
}
- if (tcp_ack_scheduled(tp)) {
- if (!tp->ack.pingpong) {
+ if (inet_csk_ack_scheduled(sk)) {
+ if (!icsk->icsk_ack.pingpong) {
/* Delayed ACK missed: inflate ATO. */
- tp->ack.ato = min(tp->ack.ato << 1, tp->rto);
+ icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1, icsk->icsk_rto);
} else {
/* Delayed ACK missed: leave pingpong mode and
* deflate ATO.
*/
- tp->ack.pingpong = 0;
- tp->ack.ato = TCP_ATO_MIN;
+ icsk->icsk_ack.pingpong = 0;
+ icsk->icsk_ack.ato = TCP_ATO_MIN;
}
tcp_send_ack(sk);
NET_INC_STATS_BH(LINUX_MIB_DELAYEDACKS);
@@ -268,11 +233,12 @@ out_unlock:
static void tcp_probe_timer(struct sock *sk)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
int max_probes;
if (tp->packets_out || !sk->sk_send_head) {
- tp->probes_out = 0;
+ icsk->icsk_probes_out = 0;
return;
}
@@ -283,7 +249,7 @@ static void tcp_probe_timer(struct sock *sk)
* FIXME: We ought not to do it, Solaris 2.5 actually has fixing
* this behaviour in Solaris down as a bug fix. [AC]
*
- * Let me to explain. probes_out is zeroed by incoming ACKs
+ * Let me to explain. icsk_probes_out is zeroed by incoming ACKs
* even if they advertise zero window. Hence, connection is killed only
* if we received no ACKs for normal connection timeout. It is not killed
* only because window stays zero for some time, window may be zero
@@ -294,15 +260,15 @@ static void tcp_probe_timer(struct sock *sk)
max_probes = sysctl_tcp_retries2;
if (sock_flag(sk, SOCK_DEAD)) {
- int alive = ((tp->rto<<tp->backoff) < TCP_RTO_MAX);
+ const int alive = ((icsk->icsk_rto << icsk->icsk_backoff) < TCP_RTO_MAX);
max_probes = tcp_orphan_retries(sk, alive);
- if (tcp_out_of_resources(sk, alive || tp->probes_out <= max_probes))
+ if (tcp_out_of_resources(sk, alive || icsk->icsk_probes_out <= max_probes))
return;
}
- if (tp->probes_out > max_probes) {
+ if (icsk->icsk_probes_out > max_probes) {
tcp_write_err(sk);
} else {
/* Only send another probe if we didn't close things up. */
@@ -317,6 +283,7 @@ static void tcp_probe_timer(struct sock *sk)
static void tcp_retransmit_timer(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
if (!tp->packets_out)
goto out;
@@ -351,20 +318,21 @@ static void tcp_retransmit_timer(struct sock *sk)
if (tcp_write_timeout(sk))
goto out;
- if (tp->retransmits == 0) {
- if (tp->ca_state == TCP_CA_Disorder || tp->ca_state == TCP_CA_Recovery) {
+ if (icsk->icsk_retransmits == 0) {
+ if (icsk->icsk_ca_state == TCP_CA_Disorder ||
+ icsk->icsk_ca_state == TCP_CA_Recovery) {
if (tp->rx_opt.sack_ok) {
- if (tp->ca_state == TCP_CA_Recovery)
+ if (icsk->icsk_ca_state == TCP_CA_Recovery)
NET_INC_STATS_BH(LINUX_MIB_TCPSACKRECOVERYFAIL);
else
NET_INC_STATS_BH(LINUX_MIB_TCPSACKFAILURES);
} else {
- if (tp->ca_state == TCP_CA_Recovery)
+ if (icsk->icsk_ca_state == TCP_CA_Recovery)
NET_INC_STATS_BH(LINUX_MIB_TCPRENORECOVERYFAIL);
else
NET_INC_STATS_BH(LINUX_MIB_TCPRENOFAILURES);
}
- } else if (tp->ca_state == TCP_CA_Loss) {
+ } else if (icsk->icsk_ca_state == TCP_CA_Loss) {
NET_INC_STATS_BH(LINUX_MIB_TCPLOSSFAILURES);
} else {
NET_INC_STATS_BH(LINUX_MIB_TCPTIMEOUTS);
@@ -381,10 +349,11 @@ static void tcp_retransmit_timer(struct sock *sk)
/* Retransmission failed because of local congestion,
* do not backoff.
*/
- if (!tp->retransmits)
- tp->retransmits=1;
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS,
- min(tp->rto, TCP_RESOURCE_PROBE_INTERVAL));
+ if (!icsk->icsk_retransmits)
+ icsk->icsk_retransmits = 1;
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
+ min(icsk->icsk_rto, TCP_RESOURCE_PROBE_INTERVAL),
+ TCP_RTO_MAX);
goto out;
}
@@ -403,13 +372,13 @@ static void tcp_retransmit_timer(struct sock *sk)
* implemented ftp to mars will work nicely. We will have to fix
* the 120 second clamps though!
*/
- tp->backoff++;
- tp->retransmits++;
+ icsk->icsk_backoff++;
+ icsk->icsk_retransmits++;
out_reset_timer:
- tp->rto = min(tp->rto << 1, TCP_RTO_MAX);
- tcp_reset_xmit_timer(sk, TCP_TIME_RETRANS, tp->rto);
- if (tp->retransmits > sysctl_tcp_retries1)
+ icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, icsk->icsk_rto, TCP_RTO_MAX);
+ if (icsk->icsk_retransmits > sysctl_tcp_retries1)
__sk_dst_reset(sk);
out:;
@@ -418,32 +387,32 @@ out:;
static void tcp_write_timer(unsigned long data)
{
struct sock *sk = (struct sock*)data;
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
int event;
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
/* Try again later */
- sk_reset_timer(sk, &tp->retransmit_timer, jiffies + (HZ / 20));
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer, jiffies + (HZ / 20));
goto out_unlock;
}
- if (sk->sk_state == TCP_CLOSE || !tp->pending)
+ if (sk->sk_state == TCP_CLOSE || !icsk->icsk_pending)
goto out;
- if (time_after(tp->timeout, jiffies)) {
- sk_reset_timer(sk, &tp->retransmit_timer, tp->timeout);
+ if (time_after(icsk->icsk_timeout, jiffies)) {
+ sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
goto out;
}
- event = tp->pending;
- tp->pending = 0;
+ event = icsk->icsk_pending;
+ icsk->icsk_pending = 0;
switch (event) {
- case TCP_TIME_RETRANS:
+ case ICSK_TIME_RETRANS:
tcp_retransmit_timer(sk);
break;
- case TCP_TIME_PROBE0:
+ case ICSK_TIME_PROBE0:
tcp_probe_timer(sk);
break;
}
@@ -462,96 +431,8 @@ out_unlock:
static void tcp_synack_timer(struct sock *sk)
{
- struct tcp_sock *tp = tcp_sk(sk);
- struct listen_sock *lopt = tp->accept_queue.listen_opt;
- int max_retries = tp->syn_retries ? : sysctl_tcp_synack_retries;
- int thresh = max_retries;
- unsigned long now = jiffies;
- struct request_sock **reqp, *req;
- int i, budget;
-
- if (lopt == NULL || lopt->qlen == 0)
- return;
-
- /* Normally all the openreqs are young and become mature
- * (i.e. converted to established socket) for first timeout.
- * If synack was not acknowledged for 3 seconds, it means
- * one of the following things: synack was lost, ack was lost,
- * rtt is high or nobody planned to ack (i.e. synflood).
- * When server is a bit loaded, queue is populated with old
- * open requests, reducing effective size of queue.
- * When server is well loaded, queue size reduces to zero
- * after several minutes of work. It is not synflood,
- * it is normal operation. The solution is pruning
- * too old entries overriding normal timeout, when
- * situation becomes dangerous.
- *
- * Essentially, we reserve half of room for young
- * embrions; and abort old ones without pity, if old
- * ones are about to clog our table.
- */
- if (lopt->qlen>>(lopt->max_qlen_log-1)) {
- int young = (lopt->qlen_young<<1);
-
- while (thresh > 2) {
- if (lopt->qlen < young)
- break;
- thresh--;
- young <<= 1;
- }
- }
-
- if (tp->defer_accept)
- max_retries = tp->defer_accept;
-
- budget = 2*(TCP_SYNQ_HSIZE/(TCP_TIMEOUT_INIT/TCP_SYNQ_INTERVAL));
- i = lopt->clock_hand;
-
- do {
- reqp=&lopt->syn_table[i];
- while ((req = *reqp) != NULL) {
- if (time_after_eq(now, req->expires)) {
- if ((req->retrans < thresh ||
- (inet_rsk(req)->acked && req->retrans < max_retries))
- && !req->rsk_ops->rtx_syn_ack(sk, req, NULL)) {
- unsigned long timeo;
-
- if (req->retrans++ == 0)
- lopt->qlen_young--;
- timeo = min((TCP_TIMEOUT_INIT << req->retrans),
- TCP_RTO_MAX);
- req->expires = now + timeo;
- reqp = &req->dl_next;
- continue;
- }
-
- /* Drop this request */
- tcp_synq_unlink(tp, req, reqp);
- reqsk_queue_removed(&tp->accept_queue, req);
- reqsk_free(req);
- continue;
- }
- reqp = &req->dl_next;
- }
-
- i = (i+1)&(TCP_SYNQ_HSIZE-1);
-
- } while (--budget > 0);
-
- lopt->clock_hand = i;
-
- if (lopt->qlen)
- tcp_reset_keepalive_timer(sk, TCP_SYNQ_INTERVAL);
-}
-
-void tcp_delete_keepalive_timer (struct sock *sk)
-{
- sk_stop_timer(sk, &sk->sk_timer);
-}
-
-void tcp_reset_keepalive_timer (struct sock *sk, unsigned long len)
-{
- sk_reset_timer(sk, &sk->sk_timer, jiffies + len);
+ inet_csk_reqsk_queue_prune(sk, TCP_SYNQ_INTERVAL,
+ TCP_TIMEOUT_INIT, TCP_RTO_MAX);
}
void tcp_set_keepalive(struct sock *sk, int val)
@@ -560,15 +441,16 @@ void tcp_set_keepalive(struct sock *sk, int val)
return;
if (val && !sock_flag(sk, SOCK_KEEPOPEN))
- tcp_reset_keepalive_timer(sk, keepalive_time_when(tcp_sk(sk)));
+ inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tcp_sk(sk)));
else if (!val)
- tcp_delete_keepalive_timer(sk);
+ inet_csk_delete_keepalive_timer(sk);
}
static void tcp_keepalive_timer (unsigned long data)
{
struct sock *sk = (struct sock *) data;
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
__u32 elapsed;
@@ -576,7 +458,7 @@ static void tcp_keepalive_timer (unsigned long data)
bh_lock_sock(sk);
if (sock_owned_by_user(sk)) {
/* Try again later. */
- tcp_reset_keepalive_timer (sk, HZ/20);
+ inet_csk_reset_keepalive_timer (sk, HZ/20);
goto out;
}
@@ -587,7 +469,7 @@ static void tcp_keepalive_timer (unsigned long data)
if (sk->sk_state == TCP_FIN_WAIT2 && sock_flag(sk, SOCK_DEAD)) {
if (tp->linger2 >= 0) {
- int tmo = tcp_fin_time(tp) - TCP_TIMEWAIT_LEN;
+ const int tmo = tcp_fin_time(sk) - TCP_TIMEWAIT_LEN;
if (tmo > 0) {
tcp_time_wait(sk, TCP_FIN_WAIT2, tmo);
@@ -610,14 +492,14 @@ static void tcp_keepalive_timer (unsigned long data)
elapsed = tcp_time_stamp - tp->rcv_tstamp;
if (elapsed >= keepalive_time_when(tp)) {
- if ((!tp->keepalive_probes && tp->probes_out >= sysctl_tcp_keepalive_probes) ||
- (tp->keepalive_probes && tp->probes_out >= tp->keepalive_probes)) {
+ if ((!tp->keepalive_probes && icsk->icsk_probes_out >= sysctl_tcp_keepalive_probes) ||
+ (tp->keepalive_probes && icsk->icsk_probes_out >= tp->keepalive_probes)) {
tcp_send_active_reset(sk, GFP_ATOMIC);
tcp_write_err(sk);
goto out;
}
if (tcp_write_wakeup(sk) <= 0) {
- tp->probes_out++;
+ icsk->icsk_probes_out++;
elapsed = keepalive_intvl_when(tp);
} else {
/* If keepalive was lost due to local congestion,
@@ -634,7 +516,7 @@ static void tcp_keepalive_timer (unsigned long data)
sk_stream_mem_reclaim(sk);
resched:
- tcp_reset_keepalive_timer (sk, elapsed);
+ inet_csk_reset_keepalive_timer (sk, elapsed);
goto out;
death:
@@ -644,8 +526,3 @@ out:
bh_unlock_sock(sk);
sock_put(sk);
}
-
-EXPORT_SYMBOL(tcp_clear_xmit_timers);
-EXPORT_SYMBOL(tcp_delete_keepalive_timer);
-EXPORT_SYMBOL(tcp_init_xmit_timers);
-EXPORT_SYMBOL(tcp_reset_keepalive_timer);
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 9bd443db5193..93c5f92070f9 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -35,7 +35,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/skbuff.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
#include <net/tcp.h>
@@ -82,9 +82,10 @@ struct vegas {
* Instead we must wait until the completion of an RTT during
* which we actually receive ACKs.
*/
-static inline void vegas_enable(struct tcp_sock *tp)
+static inline void vegas_enable(struct sock *sk)
{
- struct vegas *vegas = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct vegas *vegas = inet_csk_ca(sk);
/* Begin taking Vegas samples next time we send something. */
vegas->doing_vegas_now = 1;
@@ -97,19 +98,19 @@ static inline void vegas_enable(struct tcp_sock *tp)
}
/* Stop taking Vegas samples for now. */
-static inline void vegas_disable(struct tcp_sock *tp)
+static inline void vegas_disable(struct sock *sk)
{
- struct vegas *vegas = tcp_ca(tp);
+ struct vegas *vegas = inet_csk_ca(sk);
vegas->doing_vegas_now = 0;
}
-static void tcp_vegas_init(struct tcp_sock *tp)
+static void tcp_vegas_init(struct sock *sk)
{
- struct vegas *vegas = tcp_ca(tp);
+ struct vegas *vegas = inet_csk_ca(sk);
vegas->baseRTT = 0x7fffffff;
- vegas_enable(tp);
+ vegas_enable(sk);
}
/* Do RTT sampling needed for Vegas.
@@ -120,9 +121,9 @@ static void tcp_vegas_init(struct tcp_sock *tp)
* o min-filter RTT samples from a much longer window (forever for now)
* to find the propagation delay (baseRTT)
*/
-static void tcp_vegas_rtt_calc(struct tcp_sock *tp, u32 usrtt)
+static void tcp_vegas_rtt_calc(struct sock *sk, u32 usrtt)
{
- struct vegas *vegas = tcp_ca(tp);
+ struct vegas *vegas = inet_csk_ca(sk);
u32 vrtt = usrtt + 1; /* Never allow zero rtt or baseRTT */
/* Filter to find propagation delay: */
@@ -136,13 +137,13 @@ static void tcp_vegas_rtt_calc(struct tcp_sock *tp, u32 usrtt)
vegas->cntRTT++;
}
-static void tcp_vegas_state(struct tcp_sock *tp, u8 ca_state)
+static void tcp_vegas_state(struct sock *sk, u8 ca_state)
{
if (ca_state == TCP_CA_Open)
- vegas_enable(tp);
+ vegas_enable(sk);
else
- vegas_disable(tp);
+ vegas_disable(sk);
}
/*
@@ -154,20 +155,21 @@ static void tcp_vegas_state(struct tcp_sock *tp, u8 ca_state)
* packets, _then_ we can make Vegas calculations
* again.
*/
-static void tcp_vegas_cwnd_event(struct tcp_sock *tp, enum tcp_ca_event event)
+static void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event)
{
if (event == CA_EVENT_CWND_RESTART ||
event == CA_EVENT_TX_START)
- tcp_vegas_init(tp);
+ tcp_vegas_init(sk);
}
-static void tcp_vegas_cong_avoid(struct tcp_sock *tp, u32 ack,
+static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack,
u32 seq_rtt, u32 in_flight, int flag)
{
- struct vegas *vegas = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct vegas *vegas = inet_csk_ca(sk);
if (!vegas->doing_vegas_now)
- return tcp_reno_cong_avoid(tp, ack, seq_rtt, in_flight, flag);
+ return tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag);
/* The key players are v_beg_snd_una and v_beg_snd_nxt.
*
@@ -219,7 +221,7 @@ static void tcp_vegas_cong_avoid(struct tcp_sock *tp, u32 ack,
* but that's not too awful, since we're taking the min,
* rather than averaging.
*/
- tcp_vegas_rtt_calc(tp, seq_rtt*1000);
+ tcp_vegas_rtt_calc(sk, seq_rtt * 1000);
/* We do the Vegas calculations only if we got enough RTT
* samples that we can be reasonably sure that we got
@@ -359,14 +361,14 @@ static void tcp_vegas_cong_avoid(struct tcp_sock *tp, u32 ack,
}
/* Extract info for Tcp socket info provided via netlink. */
-static void tcp_vegas_get_info(struct tcp_sock *tp, u32 ext,
+static void tcp_vegas_get_info(struct sock *sk, u32 ext,
struct sk_buff *skb)
{
- const struct vegas *ca = tcp_ca(tp);
- if (ext & (1<<(TCPDIAG_VEGASINFO-1))) {
+ const struct vegas *ca = inet_csk_ca(sk);
+ if (ext & (1 << (INET_DIAG_VEGASINFO - 1))) {
struct tcpvegas_info *info;
- info = RTA_DATA(__RTA_PUT(skb, TCPDIAG_VEGASINFO,
+ info = RTA_DATA(__RTA_PUT(skb, INET_DIAG_VEGASINFO,
sizeof(*info)));
info->tcpv_enabled = ca->doing_vegas_now;
@@ -393,7 +395,7 @@ static struct tcp_congestion_ops tcp_vegas = {
static int __init tcp_vegas_register(void)
{
- BUG_ON(sizeof(struct vegas) > TCP_CA_PRIV_SIZE);
+ BUG_ON(sizeof(struct vegas) > ICSK_CA_PRIV_SIZE);
tcp_register_congestion_control(&tcp_vegas);
return 0;
}
diff --git a/net/ipv4/tcp_westwood.c b/net/ipv4/tcp_westwood.c
index ef827242c940..0c340c3756c2 100644
--- a/net/ipv4/tcp_westwood.c
+++ b/net/ipv4/tcp_westwood.c
@@ -8,7 +8,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/skbuff.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
#include <net/tcp.h>
/* TCP Westwood structure */
@@ -40,9 +40,9 @@ struct westwood {
* way as soon as possible. It will reasonably happen within the first
* RTT period of the connection lifetime.
*/
-static void tcp_westwood_init(struct tcp_sock *tp)
+static void tcp_westwood_init(struct sock *sk)
{
- struct westwood *w = tcp_ca(tp);
+ struct westwood *w = inet_csk_ca(sk);
w->bk = 0;
w->bw_ns_est = 0;
@@ -51,7 +51,7 @@ static void tcp_westwood_init(struct tcp_sock *tp)
w->cumul_ack = 0;
w->rtt_min = w->rtt = TCP_WESTWOOD_INIT_RTT;
w->rtt_win_sx = tcp_time_stamp;
- w->snd_una = tp->snd_una;
+ w->snd_una = tcp_sk(sk)->snd_una;
}
/*
@@ -74,11 +74,11 @@ static inline void westwood_filter(struct westwood *w, u32 delta)
* Called after processing group of packets.
* but all westwood needs is the last sample of srtt.
*/
-static void tcp_westwood_pkts_acked(struct tcp_sock *tp, u32 cnt)
+static void tcp_westwood_pkts_acked(struct sock *sk, u32 cnt)
{
- struct westwood *w = tcp_ca(tp);
+ struct westwood *w = inet_csk_ca(sk);
if (cnt > 0)
- w->rtt = tp->srtt >> 3;
+ w->rtt = tcp_sk(sk)->srtt >> 3;
}
/*
@@ -86,9 +86,9 @@ static void tcp_westwood_pkts_acked(struct tcp_sock *tp, u32 cnt)
* It updates RTT evaluation window if it is the right moment to do
* it. If so it calls filter for evaluating bandwidth.
*/
-static void westwood_update_window(struct tcp_sock *tp)
+static void westwood_update_window(struct sock *sk)
{
- struct westwood *w = tcp_ca(tp);
+ struct westwood *w = inet_csk_ca(sk);
s32 delta = tcp_time_stamp - w->rtt_win_sx;
/*
@@ -114,11 +114,12 @@ static void westwood_update_window(struct tcp_sock *tp)
* header prediction is successful. In such case in fact update is
* straight forward and doesn't need any particular care.
*/
-static inline void westwood_fast_bw(struct tcp_sock *tp)
+static inline void westwood_fast_bw(struct sock *sk)
{
- struct westwood *w = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct westwood *w = inet_csk_ca(sk);
- westwood_update_window(tp);
+ westwood_update_window(sk);
w->bk += tp->snd_una - w->snd_una;
w->snd_una = tp->snd_una;
@@ -130,9 +131,10 @@ static inline void westwood_fast_bw(struct tcp_sock *tp)
* This function evaluates cumul_ack for evaluating bk in case of
* delayed or partial acks.
*/
-static inline u32 westwood_acked_count(struct tcp_sock *tp)
+static inline u32 westwood_acked_count(struct sock *sk)
{
- struct westwood *w = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct westwood *w = inet_csk_ca(sk);
w->cumul_ack = tp->snd_una - w->snd_una;
@@ -160,9 +162,10 @@ static inline u32 westwood_acked_count(struct tcp_sock *tp)
return w->cumul_ack;
}
-static inline u32 westwood_bw_rttmin(const struct tcp_sock *tp)
+static inline u32 westwood_bw_rttmin(const struct sock *sk)
{
- struct westwood *w = tcp_ca(tp);
+ const struct tcp_sock *tp = tcp_sk(sk);
+ const struct westwood *w = inet_csk_ca(sk);
return max_t(u32, (w->bw_est * w->rtt_min) / tp->mss_cache, 2);
}
@@ -172,31 +175,32 @@ static inline u32 westwood_bw_rttmin(const struct tcp_sock *tp)
* in packets we use mss_cache). Rttmin is guaranteed to be >= 2
* so avoids ever returning 0.
*/
-static u32 tcp_westwood_cwnd_min(struct tcp_sock *tp)
+static u32 tcp_westwood_cwnd_min(struct sock *sk)
{
- return westwood_bw_rttmin(tp);
+ return westwood_bw_rttmin(sk);
}
-static void tcp_westwood_event(struct tcp_sock *tp, enum tcp_ca_event event)
+static void tcp_westwood_event(struct sock *sk, enum tcp_ca_event event)
{
- struct westwood *w = tcp_ca(tp);
+ struct tcp_sock *tp = tcp_sk(sk);
+ struct westwood *w = inet_csk_ca(sk);
switch(event) {
case CA_EVENT_FAST_ACK:
- westwood_fast_bw(tp);
+ westwood_fast_bw(sk);
break;
case CA_EVENT_COMPLETE_CWR:
- tp->snd_cwnd = tp->snd_ssthresh = westwood_bw_rttmin(tp);
+ tp->snd_cwnd = tp->snd_ssthresh = westwood_bw_rttmin(sk);
break;
case CA_EVENT_FRTO:
- tp->snd_ssthresh = westwood_bw_rttmin(tp);
+ tp->snd_ssthresh = westwood_bw_rttmin(sk);
break;
case CA_EVENT_SLOW_ACK:
- westwood_update_window(tp);
- w->bk += westwood_acked_count(tp);
+ westwood_update_window(sk);
+ w->bk += westwood_acked_count(sk);
w->rtt_min = min(w->rtt, w->rtt_min);
break;
@@ -208,15 +212,15 @@ static void tcp_westwood_event(struct tcp_sock *tp, enum tcp_ca_event event)
/* Extract info for Tcp socket info provided via netlink. */
-static void tcp_westwood_info(struct tcp_sock *tp, u32 ext,
+static void tcp_westwood_info(struct sock *sk, u32 ext,
struct sk_buff *skb)
{
- const struct westwood *ca = tcp_ca(tp);
- if (ext & (1<<(TCPDIAG_VEGASINFO-1))) {
+ const struct westwood *ca = inet_csk_ca(sk);
+ if (ext & (1 << (INET_DIAG_VEGASINFO - 1))) {
struct rtattr *rta;
struct tcpvegas_info *info;
- rta = __RTA_PUT(skb, TCPDIAG_VEGASINFO, sizeof(*info));
+ rta = __RTA_PUT(skb, INET_DIAG_VEGASINFO, sizeof(*info));
info = RTA_DATA(rta);
info->tcpv_enabled = 1;
info->tcpv_rttcnt = 0;
@@ -242,7 +246,7 @@ static struct tcp_congestion_ops tcp_westwood = {
static int __init tcp_westwood_register(void)
{
- BUG_ON(sizeof(struct westwood) > TCP_CA_PRIV_SIZE);
+ BUG_ON(sizeof(struct westwood) > ICSK_CA_PRIV_SIZE);
return tcp_register_congestion_control(&tcp_westwood);
}
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index dc4d07357e3a..e5beca7de86c 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -95,7 +95,8 @@
#include <linux/ipv6.h>
#include <linux/netdevice.h>
#include <net/snmp.h>
-#include <net/tcp.h>
+#include <net/ip.h>
+#include <net/tcp_states.h>
#include <net/protocol.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
@@ -112,7 +113,7 @@
* Snmp MIB for the UDP layer
*/
-DEFINE_SNMP_STAT(struct udp_mib, udp_statistics);
+DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
struct hlist_head udp_hash[UDP_HTABLE_SIZE];
DEFINE_RWLOCK(udp_hash_lock);
@@ -628,7 +629,7 @@ back_from_confirm:
/* ... which is an evident application bug. --ANK */
release_sock(sk);
- LIMIT_NETDEBUG(printk(KERN_DEBUG "udp cork app bug 2\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
err = -EINVAL;
goto out;
}
@@ -693,7 +694,7 @@ static int udp_sendpage(struct sock *sk, struct page *page, int offset,
if (unlikely(!up->pending)) {
release_sock(sk);
- LIMIT_NETDEBUG(printk(KERN_DEBUG "udp cork app bug 3\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 3\n");
return -EINVAL;
}
@@ -1102,7 +1103,7 @@ static int udp_checksum_init(struct sk_buff *skb, struct udphdr *uh,
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (!udp_check(uh, ulen, saddr, daddr, skb->csum))
return 0;
- LIMIT_NETDEBUG(printk(KERN_DEBUG "udp v4 hw csum failure.\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "udp v4 hw csum failure.\n");
skb->ip_summed = CHECKSUM_NONE;
}
if (skb->ip_summed != CHECKSUM_UNNECESSARY)
@@ -1181,13 +1182,13 @@ int udp_rcv(struct sk_buff *skb)
return(0);
short_packet:
- LIMIT_NETDEBUG(printk(KERN_DEBUG "UDP: short packet: From %u.%u.%u.%u:%u %d/%d to %u.%u.%u.%u:%u\n",
- NIPQUAD(saddr),
- ntohs(uh->source),
- ulen,
- len,
- NIPQUAD(daddr),
- ntohs(uh->dest)));
+ LIMIT_NETDEBUG(KERN_DEBUG "UDP: short packet: From %u.%u.%u.%u:%u %d/%d to %u.%u.%u.%u:%u\n",
+ NIPQUAD(saddr),
+ ntohs(uh->source),
+ ulen,
+ len,
+ NIPQUAD(daddr),
+ ntohs(uh->dest));
no_header:
UDP_INC_STATS_BH(UDP_MIB_INERRORS);
kfree_skb(skb);
@@ -1198,12 +1199,12 @@ csum_error:
* RFC1122: OK. Discards the bad packet silently (as far as
* the network is concerned, anyway) as per 4.1.3.4 (MUST).
*/
- LIMIT_NETDEBUG(printk(KERN_DEBUG "UDP: bad checksum. From %d.%d.%d.%d:%d to %d.%d.%d.%d:%d ulen %d\n",
- NIPQUAD(saddr),
- ntohs(uh->source),
- NIPQUAD(daddr),
- ntohs(uh->dest),
- ulen));
+ LIMIT_NETDEBUG(KERN_DEBUG "UDP: bad checksum. From %d.%d.%d.%d:%d to %d.%d.%d.%d:%d ulen %d\n",
+ NIPQUAD(saddr),
+ ntohs(uh->source),
+ NIPQUAD(daddr),
+ ntohs(uh->dest),
+ ulen);
drop:
UDP_INC_STATS_BH(UDP_MIB_INERRORS);
kfree_skb(skb);
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index 050611d7a967..d23e07fc81fa 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -128,8 +128,10 @@ void __init xfrm4_state_init(void)
xfrm_state_register_afinfo(&xfrm4_state_afinfo);
}
+#if 0
void __exit xfrm4_state_fini(void)
{
xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
}
+#endif /* 0 */
diff --git a/net/ipv6/Makefile b/net/ipv6/Makefile
index b39e04940590..6460eec834b7 100644
--- a/net/ipv6/Makefile
+++ b/net/ipv6/Makefile
@@ -8,7 +8,7 @@ ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o sit.o \
route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o raw.o \
protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
- ip6_flowlabel.o ipv6_syms.o
+ ip6_flowlabel.o ipv6_syms.o netfilter.o
ipv6-$(CONFIG_XFRM) += xfrm6_policy.o xfrm6_state.o xfrm6_input.o \
xfrm6_output.o
@@ -23,3 +23,5 @@ obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_IPV6_TUNNEL) += ip6_tunnel.o
obj-y += exthdrs_core.o
+
+obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_hashtables.o
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 77004b9456c0..937ad32db77c 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1041,9 +1041,9 @@ int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
const struct in6_addr *sk2_rcv_saddr6 = tcp_v6_rcv_saddr(sk2);
u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
- u32 sk2_rcv_saddr = tcp_v4_rcv_saddr(sk2);
+ u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
int sk_ipv6only = ipv6_only_sock(sk);
- int sk2_ipv6only = tcp_v6_ipv6only(sk2);
+ int sk2_ipv6only = inet_v6_ipv6only(sk2);
int addr_type = ipv6_addr_type(sk_rcv_saddr6);
int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;
@@ -1126,7 +1126,7 @@ void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
__ipv6_dev_mc_dec(idev, &maddr);
}
-void addrconf_join_anycast(struct inet6_ifaddr *ifp)
+static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
{
struct in6_addr addr;
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
@@ -1135,7 +1135,7 @@ void addrconf_join_anycast(struct inet6_ifaddr *ifp)
ipv6_dev_ac_inc(ifp->idev->dev, &addr);
}
-void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
+static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
{
struct in6_addr addr;
ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
@@ -2858,16 +2858,16 @@ static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, ENOBUFS);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS);
return;
}
if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFADDR, EINVAL);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFADDR;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFADDR, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
}
static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
@@ -2994,16 +2994,16 @@ void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, ENOBUFS);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS);
return;
}
if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_IFINFO, EINVAL);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_IFINFO;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_IFINFO, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC);
}
static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
@@ -3054,16 +3054,16 @@ static void inet6_prefix_notify(int event, struct inet6_dev *idev,
skb = alloc_skb(size, GFP_ATOMIC);
if (!skb) {
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, ENOBUFS);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS);
return;
}
if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_PREFIX, EINVAL);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_PREFIX;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_PREFIX, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC);
}
static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 28d9bcab0970..4f8795af2edb 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -44,6 +44,7 @@
#include <linux/netdevice.h>
#include <linux/icmpv6.h>
#include <linux/smp_lock.h>
+#include <linux/netfilter_ipv6.h>
#include <net/ip.h>
#include <net/ipv6.h>
@@ -66,45 +67,14 @@ MODULE_AUTHOR("Cast of dozens");
MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
MODULE_LICENSE("GPL");
-/* IPv6 procfs goodies... */
-
-#ifdef CONFIG_PROC_FS
-extern int raw6_proc_init(void);
-extern void raw6_proc_exit(void);
-extern int tcp6_proc_init(void);
-extern void tcp6_proc_exit(void);
-extern int udp6_proc_init(void);
-extern void udp6_proc_exit(void);
-extern int ipv6_misc_proc_init(void);
-extern void ipv6_misc_proc_exit(void);
-extern int ac6_proc_init(void);
-extern void ac6_proc_exit(void);
-extern int if6_proc_init(void);
-extern void if6_proc_exit(void);
-#endif
-
int sysctl_ipv6_bindv6only;
-#ifdef INET_REFCNT_DEBUG
-atomic_t inet6_sock_nr;
-EXPORT_SYMBOL(inet6_sock_nr);
-#endif
-
/* The inetsw table contains everything that inet_create needs to
* build a new socket.
*/
static struct list_head inetsw6[SOCK_MAX];
static DEFINE_SPINLOCK(inetsw6_lock);
-static void inet6_sock_destruct(struct sock *sk)
-{
- inet_sock_destruct(sk);
-
-#ifdef INET_REFCNT_DEBUG
- atomic_dec(&inet6_sock_nr);
-#endif
-}
-
static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
{
const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
@@ -185,7 +155,7 @@ static int inet6_create(struct socket *sock, int protocol)
inet->hdrincl = 1;
}
- sk->sk_destruct = inet6_sock_destruct;
+ sk->sk_destruct = inet_sock_destruct;
sk->sk_family = PF_INET6;
sk->sk_protocol = protocol;
@@ -212,12 +182,17 @@ static int inet6_create(struct socket *sock, int protocol)
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;
+ /*
+ * Increment only the relevant sk_prot->socks debug field, this changes
+ * the previous behaviour of incrementing both the equivalent to
+ * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
+ *
+ * This allows better debug granularity as we'll know exactly how many
+ * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
+ * transport protocol socks. -acme
+ */
+ sk_refcnt_debug_inc(sk);
-
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet6_sock_nr);
- atomic_inc(&inet_sock_nr);
-#endif
if (inet->num) {
/* It assumes that any protocol which allows
* the user to assign a number at socket
@@ -513,11 +488,6 @@ static struct net_proto_family inet6_family_ops = {
.owner = THIS_MODULE,
};
-#ifdef CONFIG_SYSCTL
-extern void ipv6_sysctl_register(void);
-extern void ipv6_sysctl_unregister(void);
-#endif
-
/* Same as inet6_dgram_ops, sans udp_poll. */
static struct proto_ops inet6_sockraw_ops = {
.family = PF_INET6,
@@ -684,8 +654,6 @@ static void cleanup_ipv6_mibs(void)
snmp6_mib_free((void **)udp_stats_in6);
}
-extern int ipv6_misc_proc_init(void);
-
static int __init inet6_init(void)
{
struct sk_buff *dummy_skb;
@@ -757,6 +725,9 @@ static int __init inet6_init(void)
err = igmp6_init(&inet6_family_ops);
if (err)
goto igmp_fail;
+ err = ipv6_netfilter_init();
+ if (err)
+ goto netfilter_fail;
/* Create /proc/foo6 entries. */
#ifdef CONFIG_PROC_FS
err = -ENOMEM;
@@ -813,6 +784,8 @@ proc_tcp6_fail:
raw6_proc_exit();
proc_raw6_fail:
#endif
+ ipv6_netfilter_fini();
+netfilter_fail:
igmp6_cleanup();
igmp_fail:
ndisc_cleanup();
@@ -852,6 +825,7 @@ static void __exit inet6_exit(void)
ip6_route_cleanup();
ipv6_packet_cleanup();
igmp6_cleanup();
+ ipv6_netfilter_fini();
ndisc_cleanup();
icmpv6_cleanup();
#ifdef CONFIG_SYSCTL
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 986fdfdccbcd..0ebfad907a03 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -131,10 +131,10 @@ static int ipv6_clear_mutable_options(struct ipv6hdr *iph, int len)
case NEXTHDR_HOP:
case NEXTHDR_DEST:
if (!zero_out_mutable_opts(exthdr.opth)) {
- LIMIT_NETDEBUG(printk(
+ LIMIT_NETDEBUG(
KERN_WARNING "overrun %sopts\n",
nexthdr == NEXTHDR_HOP ?
- "hop" : "dest"));
+ "hop" : "dest");
return -EINVAL;
}
break;
@@ -293,8 +293,7 @@ static int ah6_input(struct xfrm_state *x, struct xfrm_decap_state *decap, struc
skb_push(skb, skb->data - skb->nh.raw);
ahp->icv(ahp, skb, ah->auth_data);
if (memcmp(ah->auth_data, auth_data, ahp->icv_trunc_len)) {
- LIMIT_NETDEBUG(
- printk(KERN_WARNING "ipsec ah authentication error\n"));
+ LIMIT_NETDEBUG(KERN_WARNING "ipsec ah authentication error\n");
x->stats.integrity_failed++;
goto free_out;
}
@@ -332,9 +331,9 @@ static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if (!x)
return;
- NETDEBUG(printk(KERN_DEBUG "pmtu discovery on SA AH/%08x/"
- "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
- ntohl(ah->spi), NIP6(iph->daddr)));
+ NETDEBUG(KERN_DEBUG "pmtu discovery on SA AH/%08x/"
+ "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
+ ntohl(ah->spi), NIP6(iph->daddr));
xfrm_state_put(x);
}
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 5229365cd8b4..01468fab3d3d 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -29,6 +29,7 @@
#include <net/addrconf.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
+#include <net/tcp_states.h>
#include <linux/errqueue.h>
#include <asm/uaccess.h>
@@ -588,8 +589,8 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
break;
default:
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "invalid cmsg type: %d\n", cmsg->cmsg_type));
+ LIMIT_NETDEBUG(KERN_DEBUG "invalid cmsg type: %d\n",
+ cmsg->cmsg_type);
err = -EINVAL;
break;
};
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 324db62515a2..e8bff9d3d96c 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -212,8 +212,7 @@ static int esp6_input(struct xfrm_state *x, struct xfrm_decap_state *decap, stru
padlen = nexthdr[0];
if (padlen+2 >= elen) {
- LIMIT_NETDEBUG(
- printk(KERN_WARNING "ipsec esp packet is garbage padlen=%d, elen=%d\n", padlen+2, elen));
+ LIMIT_NETDEBUG(KERN_WARNING "ipsec esp packet is garbage padlen=%d, elen=%d\n", padlen+2, elen);
ret = -EINVAL;
goto out;
}
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index e0839eafc3a9..5be6da2584ee 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -424,8 +424,8 @@ static int ipv6_hop_ra(struct sk_buff *skb, int optoff)
IP6CB(skb)->ra = optoff;
return 1;
}
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ipv6_hop_ra: wrong RA length %d\n", skb->nh.raw[optoff+1]));
+ LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_ra: wrong RA length %d\n",
+ skb->nh.raw[optoff+1]);
kfree_skb(skb);
return 0;
}
@@ -437,8 +437,8 @@ static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
u32 pkt_len;
if (skb->nh.raw[optoff+1] != 4 || (optoff&3) != 2) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n", skb->nh.raw[optoff+1]));
+ LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",
+ skb->nh.raw[optoff+1]);
IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
goto drop;
}
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index ff3ec9822e36..5176fc655ea9 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -67,7 +67,7 @@
#include <asm/uaccess.h>
#include <asm/system.h>
-DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
+DEFINE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics) __read_mostly;
/*
* The ICMP socket(s). This is the most convenient way to flow control
@@ -332,8 +332,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
* for now we don't know that.
*/
if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n");
return;
}
@@ -341,8 +340,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
* Never answer to a ICMP packet.
*/
if (is_ineligible(skb)) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "icmpv6_send: no reply to icmp error\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: no reply to icmp error\n");
return;
}
@@ -393,8 +391,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
len = skb->len - msg.offset;
len = min_t(unsigned int, len, IPV6_MIN_MTU - sizeof(struct ipv6hdr) -sizeof(struct icmp6hdr));
if (len < 0) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "icmp: len problem\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "icmp: len problem\n");
goto out_dst_release;
}
@@ -551,7 +548,8 @@ static void icmpv6_notify(struct sk_buff *skb, int type, int code, u32 info)
read_lock(&raw_v6_lock);
if ((sk = sk_head(&raw_v6_htable[hash])) != NULL) {
- while((sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr))) {
+ while((sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr,
+ skb->dev->ifindex))) {
rawv6_err(sk, skb, NULL, type, code, inner_offset, info);
sk = sk_next(sk);
}
@@ -583,17 +581,15 @@ static int icmpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_ICMPV6,
skb->csum)) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ICMPv6 hw checksum failed\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "ICMPv6 hw checksum failed\n");
skb->ip_summed = CHECKSUM_NONE;
}
}
if (skb->ip_summed == CHECKSUM_NONE) {
if (csum_ipv6_magic(saddr, daddr, skb->len, IPPROTO_ICMPV6,
skb_checksum(skb, 0, skb->len, 0))) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ICMPv6 checksum failed [%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x > %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x]\n",
- NIP6(*saddr), NIP6(*daddr)));
+ LIMIT_NETDEBUG(KERN_DEBUG "ICMPv6 checksum failed [%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x > %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x]\n",
+ NIP6(*saddr), NIP6(*daddr));
goto discard_it;
}
}
@@ -669,8 +665,7 @@ static int icmpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
break;
default:
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "icmpv6: msg of unknown type\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "icmpv6: msg of unknown type\n");
/* informational */
if (type & ICMPV6_INFOMSG_MASK)
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
new file mode 100644
index 000000000000..01d5f46d4e40
--- /dev/null
+++ b/net/ipv6/inet6_hashtables.c
@@ -0,0 +1,81 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Generic INET6 transport hashtables
+ *
+ * Authors: Lotsa people, from code originally in tcp
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+
+#include <net/inet_connection_sock.h>
+#include <net/inet_hashtables.h>
+#include <net/inet6_hashtables.h>
+
+struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *daddr,
+ const unsigned short hnum, const int dif)
+{
+ struct sock *sk;
+ const struct hlist_node *node;
+ struct sock *result = NULL;
+ int score, hiscore = 0;
+
+ read_lock(&hashinfo->lhash_lock);
+ sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
+ if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+
+ score = 1;
+ if (!ipv6_addr_any(&np->rcv_saddr)) {
+ if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
+ continue;
+ score++;
+ }
+ if (sk->sk_bound_dev_if) {
+ if (sk->sk_bound_dev_if != dif)
+ continue;
+ score++;
+ }
+ if (score == 3) {
+ result = sk;
+ break;
+ }
+ if (score > hiscore) {
+ hiscore = score;
+ result = sk;
+ }
+ }
+ }
+ if (result)
+ sock_hold(result);
+ read_unlock(&hashinfo->lhash_lock);
+ return result;
+}
+
+EXPORT_SYMBOL_GPL(inet6_lookup_listener);
+
+struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
+ const struct in6_addr *saddr, const u16 sport,
+ const struct in6_addr *daddr, const u16 dport,
+ const int dif)
+{
+ struct sock *sk;
+
+ local_bh_disable();
+ sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
+ local_bh_enable();
+
+ return sk;
+}
+
+EXPORT_SYMBOL_GPL(inet6_lookup);
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 1b354aa97934..16af874c9e8f 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -49,7 +49,7 @@
struct rt6_statistics rt6_stats;
-static kmem_cache_t * fib6_node_kmem;
+static kmem_cache_t * fib6_node_kmem __read_mostly;
enum fib_walk_state_t
{
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 10fbb50daea4..6e3480426939 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -56,7 +56,7 @@ static inline int ip6_rcv_finish( struct sk_buff *skb)
return dst_input(skb);
}
-int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct ipv6hdr *hdr;
u32 pkt_len;
@@ -166,8 +166,8 @@ resubmit:
nexthdr = skb->nh.raw[nhoff];
raw_sk = sk_head(&raw_v6_htable[nexthdr & (MAX_INET_PROTOS - 1)]);
- if (raw_sk)
- ipv6_raw_deliver(skb, nexthdr);
+ if (raw_sk && !ipv6_raw_deliver(skb, nexthdr))
+ raw_sk = NULL;
hash = nexthdr & (MAX_INET_PROTOS - 1);
if ((ipprot = rcu_dereference(inet6_protos[hash])) != NULL) {
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index ae652ca14bc9..01ef94f7c7f1 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -153,51 +153,6 @@ int ip6_output(struct sk_buff *skb)
return ip6_output2(skb);
}
-#ifdef CONFIG_NETFILTER
-int ip6_route_me_harder(struct sk_buff *skb)
-{
- struct ipv6hdr *iph = skb->nh.ipv6h;
- struct dst_entry *dst;
- struct flowi fl = {
- .oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
- .nl_u =
- { .ip6_u =
- { .daddr = iph->daddr,
- .saddr = iph->saddr, } },
- .proto = iph->nexthdr,
- };
-
- dst = ip6_route_output(skb->sk, &fl);
-
- if (dst->error) {
- IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ip6_route_me_harder: No more route.\n"));
- dst_release(dst);
- return -EINVAL;
- }
-
- /* Drop old route. */
- dst_release(skb->dst);
-
- skb->dst = dst;
- return 0;
-}
-#endif
-
-static inline int ip6_maybe_reroute(struct sk_buff *skb)
-{
-#ifdef CONFIG_NETFILTER
- if (skb->nfcache & NFC_ALTERED){
- if (ip6_route_me_harder(skb) != 0){
- kfree_skb(skb);
- return -EINVAL;
- }
- }
-#endif /* CONFIG_NETFILTER */
- return dst_output(skb);
-}
-
/*
* xmit an sk_buff (used by TCP)
*/
@@ -266,7 +221,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
mtu = dst_mtu(dst);
if ((skb->len <= mtu) || ipfragok) {
IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
- return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev, ip6_maybe_reroute);
+ return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev,
+ dst_output);
}
if (net_ratelimit())
@@ -321,7 +277,9 @@ static int ip6_call_ra_chain(struct sk_buff *skb, int sel)
read_lock(&ip6_ra_lock);
for (ra = ip6_ra_chain; ra; ra = ra->next) {
struct sock *sk = ra->sk;
- if (sk && ra->sel == sel) {
+ if (sk && ra->sel == sel &&
+ (!sk->sk_bound_dev_if ||
+ sk->sk_bound_dev_if == skb->dev->ifindex)) {
if (last) {
struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
if (skb2)
@@ -667,7 +625,7 @@ slow_path:
*/
if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_RESERVED_SPACE(rt->u.dst.dev), GFP_ATOMIC)) == NULL) {
- NETDEBUG(printk(KERN_INFO "IPv6: frag: no memory for new fragment!\n"));
+ NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
IP6_INC_STATS(IPSTATS_MIB_FRAGFAILS);
err = -ENOMEM;
goto fail;
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 3bc144a79fa5..76466af8331e 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -55,7 +55,7 @@
#include <asm/uaccess.h>
-DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics);
+DEFINE_SNMP_STAT(struct ipstats_mib, ipv6_statistics) __read_mostly;
static struct packet_type ipv6_packet_type = {
.type = __constant_htons(ETH_P_IPV6),
@@ -109,13 +109,6 @@ int ip6_ra_control(struct sock *sk, int sel, void (*destructor)(struct sock *))
return 0;
}
-extern int ip6_mc_source(int add, int omode, struct sock *sk,
- struct group_source_req *pgsr);
-extern int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
-extern int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
- struct group_filter __user *optval, int __user *optlen);
-
-
int ipv6_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
@@ -163,6 +156,13 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
fl6_free_socklist(sk);
ipv6_sock_mc_close(sk);
+ /*
+ * Sock is moving from IPv6 to IPv4 (sk_prot), so
+ * remove it from the refcnt debug socks count in the
+ * original family...
+ */
+ sk_refcnt_debug_dec(sk);
+
if (sk->sk_protocol == IPPROTO_TCP) {
struct tcp_sock *tp = tcp_sk(sk);
@@ -192,9 +192,11 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
kfree_skb(pktopt);
sk->sk_destruct = inet_sock_destruct;
-#ifdef INET_REFCNT_DEBUG
- atomic_dec(&inet6_sock_nr);
-#endif
+ /*
+ * ... and add it to the refcnt debug socks count
+ * in the new family. -acme
+ */
+ sk_refcnt_debug_inc(sk);
module_put(THIS_MODULE);
retv = 0;
break;
@@ -437,7 +439,6 @@ done:
}
case MCAST_MSFILTER:
{
- extern int sysctl_optmem_max;
extern int sysctl_mld_max_msf;
struct group_filter *gsf;
diff --git a/net/ipv6/ipv6_syms.c b/net/ipv6/ipv6_syms.c
index 5ade5a5d1990..37a4a99c9fe9 100644
--- a/net/ipv6/ipv6_syms.c
+++ b/net/ipv6/ipv6_syms.c
@@ -15,9 +15,6 @@ EXPORT_SYMBOL(ndisc_mc_map);
EXPORT_SYMBOL(register_inet6addr_notifier);
EXPORT_SYMBOL(unregister_inet6addr_notifier);
EXPORT_SYMBOL(ip6_route_output);
-#ifdef CONFIG_NETFILTER
-EXPORT_SYMBOL(ip6_route_me_harder);
-#endif
EXPORT_SYMBOL(addrconf_lock);
EXPORT_SYMBOL(ipv6_setsockopt);
EXPORT_SYMBOL(ipv6_getsockopt);
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 7ae72d4c9bd2..a7eae30f4554 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -812,7 +812,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
if (ipv6_chk_acast_addr(dev, &msg->target) ||
(idev->cnf.forwarding &&
pneigh_lookup(&nd_tbl, &msg->target, dev, 0))) {
- if (skb->stamp.tv_sec != LOCALLY_ENQUEUED &&
+ if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) &&
skb->pkt_type != PACKET_HOST &&
inc != 0 &&
idev->nd_parms->proxy_delay != 0) {
@@ -1487,6 +1487,8 @@ int ndisc_rcv(struct sk_buff *skb)
return 0;
}
+ memset(NEIGH_CB(skb), 0, sizeof(struct neighbour_cb));
+
switch (msg->icmph.icmp6_type) {
case NDISC_NEIGHBOUR_SOLICITATION:
ndisc_recv_ns(skb);
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
new file mode 100644
index 000000000000..f8626ebf90fd
--- /dev/null
+++ b/net/ipv6/netfilter.c
@@ -0,0 +1,104 @@
+#include <linux/config.h>
+#include <linux/init.h>
+
+#ifdef CONFIG_NETFILTER
+
+#include <linux/kernel.h>
+#include <linux/ipv6.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6.h>
+#include <net/dst.h>
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+
+int ip6_route_me_harder(struct sk_buff *skb)
+{
+ struct ipv6hdr *iph = skb->nh.ipv6h;
+ struct dst_entry *dst;
+ struct flowi fl = {
+ .oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
+ .nl_u =
+ { .ip6_u =
+ { .daddr = iph->daddr,
+ .saddr = iph->saddr, } },
+ .proto = iph->nexthdr,
+ };
+
+ dst = ip6_route_output(skb->sk, &fl);
+
+ if (dst->error) {
+ IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
+ LIMIT_NETDEBUG(KERN_DEBUG "ip6_route_me_harder: No more route.\n");
+ dst_release(dst);
+ return -EINVAL;
+ }
+
+ /* Drop old route. */
+ dst_release(skb->dst);
+
+ skb->dst = dst;
+ return 0;
+}
+EXPORT_SYMBOL(ip6_route_me_harder);
+
+/*
+ * Extra routing may needed on local out, as the QUEUE target never
+ * returns control to the table.
+ */
+
+struct ip6_rt_info {
+ struct in6_addr daddr;
+ struct in6_addr saddr;
+};
+
+static void save(const struct sk_buff *skb, struct nf_info *info)
+{
+ struct ip6_rt_info *rt_info = nf_info_reroute(info);
+
+ if (info->hook == NF_IP6_LOCAL_OUT) {
+ struct ipv6hdr *iph = skb->nh.ipv6h;
+
+ rt_info->daddr = iph->daddr;
+ rt_info->saddr = iph->saddr;
+ }
+}
+
+static int reroute(struct sk_buff **pskb, const struct nf_info *info)
+{
+ struct ip6_rt_info *rt_info = nf_info_reroute(info);
+
+ if (info->hook == NF_IP6_LOCAL_OUT) {
+ struct ipv6hdr *iph = (*pskb)->nh.ipv6h;
+ if (!ipv6_addr_equal(&iph->daddr, &rt_info->daddr) ||
+ !ipv6_addr_equal(&iph->saddr, &rt_info->saddr))
+ return ip6_route_me_harder(*pskb);
+ }
+ return 0;
+}
+
+static struct nf_queue_rerouter ip6_reroute = {
+ .rer_size = sizeof(struct ip6_rt_info),
+ .save = &save,
+ .reroute = &reroute,
+};
+
+int __init ipv6_netfilter_init(void)
+{
+ return nf_register_queue_rerouter(PF_INET6, &ip6_reroute);
+}
+
+void ipv6_netfilter_fini(void)
+{
+ nf_unregister_queue_rerouter(PF_INET6);
+}
+
+#else /* CONFIG_NETFILTER */
+int __init ipv6_netfilter_init(void)
+{
+ return 0;
+}
+
+void ipv6_netfilter_fini(void)
+{
+}
+#endif /* CONFIG_NETFILTER */
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 77ec704c9ee3..216fbe1ac65c 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -10,13 +10,16 @@ menu "IPv6: Netfilter Configuration (EXPERIMENTAL)"
# dep_tristate ' FTP protocol support' CONFIG_IP6_NF_FTP $CONFIG_IP6_NF_CONNTRACK
#fi
config IP6_NF_QUEUE
- tristate "Userspace queueing via NETLINK"
+ tristate "IP6 Userspace queueing via NETLINK (OBSOLETE)"
---help---
This option adds a queue handler to the kernel for IPv6
- packets which lets us to receive the filtered packets
- with QUEUE target using libiptc as we can do with
- the IPv4 now.
+ packets which enables users to receive the filtered packets
+ with QUEUE target using libipq.
+
+ THis option enables the old IPv6-only "ip6_queue" implementation
+ which has been obsoleted by the new "nfnetlink_queue" code (see
+ CONFIG_NETFILTER_NETLINK_QUEUE).
(C) Fernando Anton 2001
IPv64 Project - Work based in IPv64 draft by Arturo Azcorra.
@@ -196,6 +199,16 @@ config IP6_NF_TARGET_LOG
To compile it as a module, choose M here. If unsure, say N.
+config IP6_NF_TARGET_REJECT
+ tristate "REJECT target support"
+ depends on IP6_NF_FILTER
+ help
+ The REJECT target allows a filtering rule to specify that an ICMPv6
+ error should be issued in response to an incoming packet, rather
+ than silently being dropped.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
# if [ "$CONFIG_IP6_NF_FILTER" != "n" ]; then
# dep_tristate ' REJECT target support' CONFIG_IP6_NF_TARGET_REJECT $CONFIG_IP6_NF_FILTER
# if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
@@ -226,6 +239,22 @@ config IP6_NF_TARGET_MARK
To compile it as a module, choose M here. If unsure, say N.
+config IP6_NF_TARGET_HL
+ tristate 'HL (hoplimit) target support'
+ depends on IP6_NF_MANGLE
+ help
+ This option adds a `HL' target, which enables the user to decrement
+ the hoplimit value of the IPv6 header or set it to a given (lower)
+ value.
+
+ While it is safe to decrement the hoplimit value, this option also
+ enables functionality to increment and set the hoplimit value of the
+ IPv6 header to arbitrary values. This is EXTREMELY DANGEROUS since
+ you can easily create immortal packets that loop forever on the
+ network.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
#dep_tristate ' LOG target support' CONFIG_IP6_NF_TARGET_LOG $CONFIG_IP6_NF_IPTABLES
config IP6_NF_RAW
tristate 'raw table support (required for TRACE)'
diff --git a/net/ipv6/netfilter/Makefile b/net/ipv6/netfilter/Makefile
index 2e51714953b6..bd9a16a5cbba 100644
--- a/net/ipv6/netfilter/Makefile
+++ b/net/ipv6/netfilter/Makefile
@@ -20,7 +20,10 @@ obj-$(CONFIG_IP6_NF_MATCH_PHYSDEV) += ip6t_physdev.o
obj-$(CONFIG_IP6_NF_FILTER) += ip6table_filter.o
obj-$(CONFIG_IP6_NF_MANGLE) += ip6table_mangle.o
obj-$(CONFIG_IP6_NF_TARGET_MARK) += ip6t_MARK.o
+obj-$(CONFIG_IP6_NF_TARGET_HL) += ip6t_HL.o
obj-$(CONFIG_IP6_NF_QUEUE) += ip6_queue.o
obj-$(CONFIG_IP6_NF_TARGET_LOG) += ip6t_LOG.o
obj-$(CONFIG_IP6_NF_RAW) += ip6table_raw.o
obj-$(CONFIG_IP6_NF_MATCH_HL) += ip6t_hl.o
+obj-$(CONFIG_IP6_NF_TARGET_REJECT) += ip6t_REJECT.o
+obj-$(CONFIG_NETFILTER_NETLINK_QUEUE) += ip6t_NFQUEUE.o
diff --git a/net/ipv6/netfilter/ip6_queue.c b/net/ipv6/netfilter/ip6_queue.c
index a16df5b27c84..aa11cf366efa 100644
--- a/net/ipv6/netfilter/ip6_queue.c
+++ b/net/ipv6/netfilter/ip6_queue.c
@@ -47,16 +47,10 @@
#define NET_IPQ_QMAX 2088
#define NET_IPQ_QMAX_NAME "ip6_queue_maxlen"
-struct ipq_rt_info {
- struct in6_addr daddr;
- struct in6_addr saddr;
-};
-
struct ipq_queue_entry {
struct list_head list;
struct nf_info *info;
struct sk_buff *skb;
- struct ipq_rt_info rt_info;
};
typedef int (*ipq_cmpfn)(struct ipq_queue_entry *, unsigned long);
@@ -244,8 +238,8 @@ ipq_build_packet_message(struct ipq_queue_entry *entry, int *errp)
pmsg->packet_id = (unsigned long )entry;
pmsg->data_len = data_len;
- pmsg->timestamp_sec = entry->skb->stamp.tv_sec;
- pmsg->timestamp_usec = entry->skb->stamp.tv_usec;
+ pmsg->timestamp_sec = skb_tv_base.tv_sec + entry->skb->tstamp.off_sec;
+ pmsg->timestamp_usec = skb_tv_base.tv_usec + entry->skb->tstamp.off_usec;
pmsg->mark = entry->skb->nfmark;
pmsg->hook = entry->info->hook;
pmsg->hw_protocol = entry->skb->protocol;
@@ -284,7 +278,8 @@ nlmsg_failure:
}
static int
-ipq_enqueue_packet(struct sk_buff *skb, struct nf_info *info, void *data)
+ipq_enqueue_packet(struct sk_buff *skb, struct nf_info *info,
+ unsigned int queuenum, void *data)
{
int status = -EINVAL;
struct sk_buff *nskb;
@@ -302,13 +297,6 @@ ipq_enqueue_packet(struct sk_buff *skb, struct nf_info *info, void *data)
entry->info = info;
entry->skb = skb;
- if (entry->info->hook == NF_IP_LOCAL_OUT) {
- struct ipv6hdr *iph = skb->nh.ipv6h;
-
- entry->rt_info.daddr = iph->daddr;
- entry->rt_info.saddr = iph->saddr;
- }
-
nskb = ipq_build_packet_message(entry, &status);
if (nskb == NULL)
goto err_out_free;
@@ -384,23 +372,11 @@ ipq_mangle_ipv6(ipq_verdict_msg_t *v, struct ipq_queue_entry *e)
}
skb_put(e->skb, diff);
}
- if (!skb_ip_make_writable(&e->skb, v->data_len))
+ if (!skb_make_writable(&e->skb, v->data_len))
return -ENOMEM;
memcpy(e->skb->data, v->payload, v->data_len);
e->skb->ip_summed = CHECKSUM_NONE;
- e->skb->nfcache |= NFC_ALTERED;
-
- /*
- * Extra routing may needed on local out, as the QUEUE target never
- * returns control to the table.
- * Not a nice way to cmp, but works
- */
- if (e->info->hook == NF_IP_LOCAL_OUT) {
- struct ipv6hdr *iph = e->skb->nh.ipv6h;
- if (!ipv6_addr_equal(&iph->daddr, &e->rt_info.daddr) ||
- !ipv6_addr_equal(&iph->saddr, &e->rt_info.saddr))
- return ip6_route_me_harder(e->skb);
- }
+
return 0;
}
@@ -676,6 +652,11 @@ ipq_get_info(char *buffer, char **start, off_t offset, int length)
return len;
}
+static struct nf_queue_handler nfqh = {
+ .name = "ip6_queue",
+ .outfn = &ipq_enqueue_packet,
+};
+
static int
init_or_cleanup(int init)
{
@@ -686,7 +667,8 @@ init_or_cleanup(int init)
goto cleanup;
netlink_register_notifier(&ipq_nl_notifier);
- ipqnl = netlink_kernel_create(NETLINK_IP6_FW, ipq_rcv_sk);
+ ipqnl = netlink_kernel_create(NETLINK_IP6_FW, 0, ipq_rcv_sk,
+ THIS_MODULE);
if (ipqnl == NULL) {
printk(KERN_ERR "ip6_queue: failed to create netlink socket\n");
goto cleanup_netlink_notifier;
@@ -703,7 +685,7 @@ init_or_cleanup(int init)
register_netdevice_notifier(&ipq_dev_notifier);
ipq_sysctl_header = register_sysctl_table(ipq_root_table, 0);
- status = nf_register_queue_handler(PF_INET6, ipq_enqueue_packet, NULL);
+ status = nf_register_queue_handler(PF_INET6, &nfqh);
if (status < 0) {
printk(KERN_ERR "ip6_queue: failed to register queue handler\n");
goto cleanup_sysctl;
@@ -711,7 +693,7 @@ init_or_cleanup(int init)
return status;
cleanup:
- nf_unregister_queue_handler(PF_INET6);
+ nf_unregister_queue_handlers(&nfqh);
synchronize_net();
ipq_flush(NF_DROP);
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 73034511c8db..1cb8adb2787f 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -401,7 +401,6 @@ ip6t_do_table(struct sk_buff **pskb,
do {
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
- (*pskb)->nfcache |= e->nfcache;
if (ip6_packet_match(*pskb, indev, outdev, &e->ipv6,
&protoff, &offset)) {
struct ip6t_entry_target *t;
@@ -434,8 +433,8 @@ ip6t_do_table(struct sk_buff **pskb,
back->comefrom);
continue;
}
- if (table_base + v
- != (void *)e + e->next_offset) {
+ if (table_base + v != (void *)e + e->next_offset
+ && !(e->ipv6.flags & IP6T_F_GOTO)) {
/* Save old back ptr in next entry */
struct ip6t_entry *next
= (void *)e + e->next_offset;
diff --git a/net/ipv6/netfilter/ip6t_HL.c b/net/ipv6/netfilter/ip6t_HL.c
new file mode 100644
index 000000000000..8f5549b72720
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_HL.c
@@ -0,0 +1,118 @@
+/*
+ * Hop Limit modification target for ip6tables
+ * Maciej Soltysiak <solt@dns.toxicfilms.tv>
+ * Based on HW's TTL module
+ *
+ * This software is distributed under the terms of GNU GPL
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv6/ip6t_HL.h>
+
+MODULE_AUTHOR("Maciej Soltysiak <solt@dns.toxicfilms.tv>");
+MODULE_DESCRIPTION("IP tables Hop Limit modification module");
+MODULE_LICENSE("GPL");
+
+static unsigned int ip6t_hl_target(struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ unsigned int hooknum,
+ const void *targinfo, void *userinfo)
+{
+ struct ipv6hdr *ip6h;
+ const struct ip6t_HL_info *info = targinfo;
+ u_int16_t diffs[2];
+ int new_hl;
+
+ if (!skb_make_writable(pskb, (*pskb)->len))
+ return NF_DROP;
+
+ ip6h = (*pskb)->nh.ipv6h;
+
+ switch (info->mode) {
+ case IP6T_HL_SET:
+ new_hl = info->hop_limit;
+ break;
+ case IP6T_HL_INC:
+ new_hl = ip6h->hop_limit + info->hop_limit;
+ if (new_hl > 255)
+ new_hl = 255;
+ break;
+ case IP6T_HL_DEC:
+ new_hl = ip6h->hop_limit - info->hop_limit;
+ if (new_hl < 0)
+ new_hl = 0;
+ break;
+ default:
+ new_hl = ip6h->hop_limit;
+ break;
+ }
+
+ if (new_hl != ip6h->hop_limit) {
+ diffs[0] = htons(((unsigned)ip6h->hop_limit) << 8) ^ 0xFFFF;
+ ip6h->hop_limit = new_hl;
+ diffs[1] = htons(((unsigned)ip6h->hop_limit) << 8);
+ }
+
+ return IP6T_CONTINUE;
+}
+
+static int ip6t_hl_checkentry(const char *tablename,
+ const struct ip6t_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ struct ip6t_HL_info *info = targinfo;
+
+ if (targinfosize != IP6T_ALIGN(sizeof(struct ip6t_HL_info))) {
+ printk(KERN_WARNING "ip6t_HL: targinfosize %u != %Zu\n",
+ targinfosize,
+ IP6T_ALIGN(sizeof(struct ip6t_HL_info)));
+ return 0;
+ }
+
+ if (strcmp(tablename, "mangle")) {
+ printk(KERN_WARNING "ip6t_HL: can only be called from "
+ "\"mangle\" table, not \"%s\"\n", tablename);
+ return 0;
+ }
+
+ if (info->mode > IP6T_HL_MAXMODE) {
+ printk(KERN_WARNING "ip6t_HL: invalid or unknown Mode %u\n",
+ info->mode);
+ return 0;
+ }
+
+ if ((info->mode != IP6T_HL_SET) && (info->hop_limit == 0)) {
+ printk(KERN_WARNING "ip6t_HL: increment/decrement doesn't "
+ "make sense with value 0\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+static struct ip6t_target ip6t_HL = {
+ .name = "HL",
+ .target = ip6t_hl_target,
+ .checkentry = ip6t_hl_checkentry,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ip6t_register_target(&ip6t_HL);
+}
+
+static void __exit fini(void)
+{
+ ip6t_unregister_target(&ip6t_HL);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
index a692e26a4fa3..0cd1d1bd9033 100644
--- a/net/ipv6/netfilter/ip6t_LOG.c
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -26,10 +26,6 @@ MODULE_AUTHOR("Jan Rekorajski <baggins@pld.org.pl>");
MODULE_DESCRIPTION("IP6 tables LOG target module");
MODULE_LICENSE("GPL");
-static unsigned int nflog = 1;
-module_param(nflog, int, 0400);
-MODULE_PARM_DESC(nflog, "register as internal netfilter logging module");
-
struct in_device;
#include <net/route.h>
#include <linux/netfilter_ipv6/ip6t_LOG.h>
@@ -44,7 +40,7 @@ struct in_device;
static DEFINE_SPINLOCK(log_lock);
/* One level of recursion won't kill us */
-static void dump_packet(const struct ip6t_log_info *info,
+static void dump_packet(const struct nf_loginfo *info,
const struct sk_buff *skb, unsigned int ip6hoff,
int recurse)
{
@@ -53,6 +49,12 @@ static void dump_packet(const struct ip6t_log_info *info,
struct ipv6hdr _ip6h, *ih;
unsigned int ptr;
unsigned int hdrlen = 0;
+ unsigned int logflags;
+
+ if (info->type == NF_LOG_TYPE_LOG)
+ logflags = info->u.log.logflags;
+ else
+ logflags = NF_LOG_MASK;
ih = skb_header_pointer(skb, ip6hoff, sizeof(_ip6h), &_ip6h);
if (ih == NULL) {
@@ -84,7 +86,7 @@ static void dump_packet(const struct ip6t_log_info *info,
}
/* Max length: 48 "OPT (...) " */
- if (info->logflags & IP6T_LOG_IPOPT)
+ if (logflags & IP6T_LOG_IPOPT)
printk("OPT ( ");
switch (currenthdr) {
@@ -119,7 +121,7 @@ static void dump_packet(const struct ip6t_log_info *info,
case IPPROTO_ROUTING:
case IPPROTO_HOPOPTS:
if (fragment) {
- if (info->logflags & IP6T_LOG_IPOPT)
+ if (logflags & IP6T_LOG_IPOPT)
printk(")");
return;
}
@@ -127,7 +129,7 @@ static void dump_packet(const struct ip6t_log_info *info,
break;
/* Max Length */
case IPPROTO_AH:
- if (info->logflags & IP6T_LOG_IPOPT) {
+ if (logflags & IP6T_LOG_IPOPT) {
struct ip_auth_hdr _ahdr, *ah;
/* Max length: 3 "AH " */
@@ -158,7 +160,7 @@ static void dump_packet(const struct ip6t_log_info *info,
hdrlen = (hp->hdrlen+2)<<2;
break;
case IPPROTO_ESP:
- if (info->logflags & IP6T_LOG_IPOPT) {
+ if (logflags & IP6T_LOG_IPOPT) {
struct ip_esp_hdr _esph, *eh;
/* Max length: 4 "ESP " */
@@ -190,7 +192,7 @@ static void dump_packet(const struct ip6t_log_info *info,
printk("Unknown Ext Hdr %u", currenthdr);
return;
}
- if (info->logflags & IP6T_LOG_IPOPT)
+ if (logflags & IP6T_LOG_IPOPT)
printk(") ");
currenthdr = hp->nexthdr;
@@ -218,7 +220,7 @@ static void dump_packet(const struct ip6t_log_info *info,
printk("SPT=%u DPT=%u ",
ntohs(th->source), ntohs(th->dest));
/* Max length: 30 "SEQ=4294967295 ACK=4294967295 " */
- if (info->logflags & IP6T_LOG_TCPSEQ)
+ if (logflags & IP6T_LOG_TCPSEQ)
printk("SEQ=%u ACK=%u ",
ntohl(th->seq), ntohl(th->ack_seq));
/* Max length: 13 "WINDOW=65535 " */
@@ -245,7 +247,7 @@ static void dump_packet(const struct ip6t_log_info *info,
/* Max length: 11 "URGP=65535 " */
printk("URGP=%u ", ntohs(th->urg_ptr));
- if ((info->logflags & IP6T_LOG_TCPOPT)
+ if ((logflags & IP6T_LOG_TCPOPT)
&& th->doff * 4 > sizeof(struct tcphdr)) {
u_int8_t _opt[60 - sizeof(struct tcphdr)], *op;
unsigned int i;
@@ -349,7 +351,7 @@ static void dump_packet(const struct ip6t_log_info *info,
}
/* Max length: 15 "UID=4294967295 " */
- if ((info->logflags & IP6T_LOG_UID) && recurse && skb->sk) {
+ if ((logflags & IP6T_LOG_UID) && recurse && skb->sk) {
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->sk->sk_socket && skb->sk->sk_socket->file)
printk("UID=%u ", skb->sk->sk_socket->file->f_uid);
@@ -357,19 +359,31 @@ static void dump_packet(const struct ip6t_log_info *info,
}
}
+static struct nf_loginfo default_loginfo = {
+ .type = NF_LOG_TYPE_LOG,
+ .u = {
+ .log = {
+ .level = 0,
+ .logflags = NF_LOG_MASK,
+ },
+ },
+};
+
static void
-ip6t_log_packet(unsigned int hooknum,
+ip6t_log_packet(unsigned int pf,
+ unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
- const struct ip6t_log_info *loginfo,
- const char *level_string,
+ const struct nf_loginfo *loginfo,
const char *prefix)
{
+ if (!loginfo)
+ loginfo = &default_loginfo;
+
spin_lock_bh(&log_lock);
- printk(level_string);
- printk("%sIN=%s OUT=%s ",
- prefix == NULL ? loginfo->prefix : prefix,
+ printk("<%d>%sIN=%s OUT=%s ", loginfo->u.log.level,
+ prefix,
in ? in->name : "",
out ? out->name : "");
if (in && !out) {
@@ -416,29 +430,17 @@ ip6t_log_target(struct sk_buff **pskb,
void *userinfo)
{
const struct ip6t_log_info *loginfo = targinfo;
- char level_string[4] = "< >";
+ struct nf_loginfo li;
+
+ li.type = NF_LOG_TYPE_LOG;
+ li.u.log.level = loginfo->level;
+ li.u.log.logflags = loginfo->logflags;
- level_string[1] = '0' + (loginfo->level % 8);
- ip6t_log_packet(hooknum, *pskb, in, out, loginfo, level_string, NULL);
+ nf_log_packet(PF_INET6, hooknum, *pskb, in, out, &li, loginfo->prefix);
return IP6T_CONTINUE;
}
-static void
-ip6t_logfn(unsigned int hooknum,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const char *prefix)
-{
- struct ip6t_log_info loginfo = {
- .level = 0,
- .logflags = IP6T_LOG_MASK,
- .prefix = ""
- };
-
- ip6t_log_packet(hooknum, skb, in, out, &loginfo, KERN_WARNING, prefix);
-}
static int ip6t_log_checkentry(const char *tablename,
const struct ip6t_entry *e,
@@ -475,20 +477,29 @@ static struct ip6t_target ip6t_log_reg = {
.me = THIS_MODULE,
};
+static struct nf_logger ip6t_logger = {
+ .name = "ip6t_LOG",
+ .logfn = &ip6t_log_packet,
+ .me = THIS_MODULE,
+};
+
static int __init init(void)
{
if (ip6t_register_target(&ip6t_log_reg))
return -EINVAL;
- if (nflog)
- nf_log_register(PF_INET6, &ip6t_logfn);
+ if (nf_log_register(PF_INET6, &ip6t_logger) < 0) {
+ printk(KERN_WARNING "ip6t_LOG: not logging via system console "
+ "since somebody else already registered for PF_INET6\n");
+ /* we cannot make module load fail here, since otherwise
+ * ip6tables userspace would abort */
+ }
return 0;
}
static void __exit fini(void)
{
- if (nflog)
- nf_log_unregister(PF_INET6, &ip6t_logfn);
+ nf_log_unregister_logger(&ip6t_logger);
ip6t_unregister_target(&ip6t_log_reg);
}
diff --git a/net/ipv6/netfilter/ip6t_MARK.c b/net/ipv6/netfilter/ip6t_MARK.c
index d09ceb05013a..81924fcc5857 100644
--- a/net/ipv6/netfilter/ip6t_MARK.c
+++ b/net/ipv6/netfilter/ip6t_MARK.c
@@ -28,10 +28,9 @@ target(struct sk_buff **pskb,
{
const struct ip6t_mark_target_info *markinfo = targinfo;
- if((*pskb)->nfmark != markinfo->mark) {
+ if((*pskb)->nfmark != markinfo->mark)
(*pskb)->nfmark = markinfo->mark;
- (*pskb)->nfcache |= NFC_ALTERED;
- }
+
return IP6T_CONTINUE;
}
diff --git a/net/ipv6/netfilter/ip6t_NFQUEUE.c b/net/ipv6/netfilter/ip6t_NFQUEUE.c
new file mode 100644
index 000000000000..c6e3730e7409
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_NFQUEUE.c
@@ -0,0 +1,70 @@
+/* ip6tables module for using new netfilter netlink queue
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv4/ipt_NFQUEUE.h>
+
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_DESCRIPTION("ip6tables NFQUEUE target");
+MODULE_LICENSE("GPL");
+
+static unsigned int
+target(struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ unsigned int hooknum,
+ const void *targinfo,
+ void *userinfo)
+{
+ const struct ipt_NFQ_info *tinfo = targinfo;
+
+ return NF_QUEUE_NR(tinfo->queuenum);
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ip6t_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ if (targinfosize != IP6T_ALIGN(sizeof(struct ipt_NFQ_info))) {
+ printk(KERN_WARNING "NFQUEUE: targinfosize %u != %Zu\n",
+ targinfosize,
+ IP6T_ALIGN(sizeof(struct ipt_NFQ_info)));
+ return 0;
+ }
+
+ return 1;
+}
+
+static struct ip6t_target ipt_NFQ_reg = {
+ .name = "NFQUEUE",
+ .target = target,
+ .checkentry = checkentry,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ip6t_register_target(&ipt_NFQ_reg);
+}
+
+static void __exit fini(void)
+{
+ ip6t_unregister_target(&ipt_NFQ_reg);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
new file mode 100644
index 000000000000..14316c3ebde4
--- /dev/null
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -0,0 +1,284 @@
+/*
+ * IP6 tables REJECT target module
+ * Linux INET6 implementation
+ *
+ * Copyright (C)2003 USAGI/WIDE Project
+ *
+ * Authors:
+ * Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
+ *
+ * Based on net/ipv4/netfilter/ipt_REJECT.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/icmpv6.h>
+#include <linux/netdevice.h>
+#include <net/ipv6.h>
+#include <net/tcp.h>
+#include <net/icmp.h>
+#include <net/ip6_checksum.h>
+#include <net/ip6_fib.h>
+#include <net/ip6_route.h>
+#include <net/flow.h>
+#include <linux/netfilter_ipv6/ip6_tables.h>
+#include <linux/netfilter_ipv6/ip6t_REJECT.h>
+
+MODULE_AUTHOR("Yasuyuki KOZAKAI <yasuyuki.kozakai@toshiba.co.jp>");
+MODULE_DESCRIPTION("IP6 tables REJECT target module");
+MODULE_LICENSE("GPL");
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+/* Send RST reply */
+static void send_reset(struct sk_buff *oldskb)
+{
+ struct sk_buff *nskb;
+ struct tcphdr otcph, *tcph;
+ unsigned int otcplen, hh_len;
+ int tcphoff, needs_ack;
+ struct ipv6hdr *oip6h = oldskb->nh.ipv6h, *ip6h;
+ struct dst_entry *dst = NULL;
+ u8 proto;
+ struct flowi fl;
+
+ if ((!(ipv6_addr_type(&oip6h->saddr) & IPV6_ADDR_UNICAST)) ||
+ (!(ipv6_addr_type(&oip6h->daddr) & IPV6_ADDR_UNICAST))) {
+ DEBUGP("ip6t_REJECT: addr is not unicast.\n");
+ return;
+ }
+
+ proto = oip6h->nexthdr;
+ tcphoff = ipv6_skip_exthdr(oldskb, ((u8*)(oip6h+1) - oldskb->data), &proto);
+
+ if ((tcphoff < 0) || (tcphoff > oldskb->len)) {
+ DEBUGP("ip6t_REJECT: Can't get TCP header.\n");
+ return;
+ }
+
+ otcplen = oldskb->len - tcphoff;
+
+ /* IP header checks: fragment, too short. */
+ if ((proto != IPPROTO_TCP) || (otcplen < sizeof(struct tcphdr))) {
+ DEBUGP("ip6t_REJECT: proto(%d) != IPPROTO_TCP, or too short. otcplen = %d\n",
+ proto, otcplen);
+ return;
+ }
+
+ if (skb_copy_bits(oldskb, tcphoff, &otcph, sizeof(struct tcphdr)))
+ BUG();
+
+ /* No RST for RST. */
+ if (otcph.rst) {
+ DEBUGP("ip6t_REJECT: RST is set\n");
+ return;
+ }
+
+ /* Check checksum. */
+ if (csum_ipv6_magic(&oip6h->saddr, &oip6h->daddr, otcplen, IPPROTO_TCP,
+ skb_checksum(oldskb, tcphoff, otcplen, 0))) {
+ DEBUGP("ip6t_REJECT: TCP checksum is invalid\n");
+ return;
+ }
+
+ memset(&fl, 0, sizeof(fl));
+ fl.proto = IPPROTO_TCP;
+ ipv6_addr_copy(&fl.fl6_src, &oip6h->daddr);
+ ipv6_addr_copy(&fl.fl6_dst, &oip6h->saddr);
+ fl.fl_ip_sport = otcph.dest;
+ fl.fl_ip_dport = otcph.source;
+ dst = ip6_route_output(NULL, &fl);
+ if (dst == NULL)
+ return;
+ if (dst->error ||
+ xfrm_lookup(&dst, &fl, NULL, 0)) {
+ dst_release(dst);
+ return;
+ }
+
+ hh_len = (dst->dev->hard_header_len + 15)&~15;
+ nskb = alloc_skb(hh_len + 15 + dst->header_len + sizeof(struct ipv6hdr)
+ + sizeof(struct tcphdr) + dst->trailer_len,
+ GFP_ATOMIC);
+
+ if (!nskb) {
+ if (net_ratelimit())
+ printk("ip6t_REJECT: Can't alloc skb\n");
+ dst_release(dst);
+ return;
+ }
+
+ nskb->dst = dst;
+
+ skb_reserve(nskb, hh_len + dst->header_len);
+
+ ip6h = nskb->nh.ipv6h = (struct ipv6hdr *)
+ skb_put(nskb, sizeof(struct ipv6hdr));
+ ip6h->version = 6;
+ ip6h->hop_limit = dst_metric(dst, RTAX_HOPLIMIT);
+ ip6h->nexthdr = IPPROTO_TCP;
+ ip6h->payload_len = htons(sizeof(struct tcphdr));
+ ipv6_addr_copy(&ip6h->saddr, &oip6h->daddr);
+ ipv6_addr_copy(&ip6h->daddr, &oip6h->saddr);
+
+ tcph = (struct tcphdr *)skb_put(nskb, sizeof(struct tcphdr));
+ /* Truncate to length (no data) */
+ tcph->doff = sizeof(struct tcphdr)/4;
+ tcph->source = otcph.dest;
+ tcph->dest = otcph.source;
+
+ if (otcph.ack) {
+ needs_ack = 0;
+ tcph->seq = otcph.ack_seq;
+ tcph->ack_seq = 0;
+ } else {
+ needs_ack = 1;
+ tcph->ack_seq = htonl(ntohl(otcph.seq) + otcph.syn + otcph.fin
+ + otcplen - (otcph.doff<<2));
+ tcph->seq = 0;
+ }
+
+ /* Reset flags */
+ ((u_int8_t *)tcph)[13] = 0;
+ tcph->rst = 1;
+ tcph->ack = needs_ack;
+ tcph->window = 0;
+ tcph->urg_ptr = 0;
+ tcph->check = 0;
+
+ /* Adjust TCP checksum */
+ tcph->check = csum_ipv6_magic(&nskb->nh.ipv6h->saddr,
+ &nskb->nh.ipv6h->daddr,
+ sizeof(struct tcphdr), IPPROTO_TCP,
+ csum_partial((char *)tcph,
+ sizeof(struct tcphdr), 0));
+
+ NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
+ dst_output);
+}
+
+static inline void
+send_unreach(struct sk_buff *skb_in, unsigned char code, unsigned int hooknum)
+{
+ if (hooknum == NF_IP6_LOCAL_OUT && skb_in->dev == NULL)
+ skb_in->dev = &loopback_dev;
+
+ icmpv6_send(skb_in, ICMPV6_DEST_UNREACH, code, 0, NULL);
+}
+
+static unsigned int reject6_target(struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ unsigned int hooknum,
+ const void *targinfo,
+ void *userinfo)
+{
+ const struct ip6t_reject_info *reject = targinfo;
+
+ DEBUGP(KERN_DEBUG "%s: medium point\n", __FUNCTION__);
+ /* WARNING: This code causes reentry within ip6tables.
+ This means that the ip6tables jump stack is now crap. We
+ must return an absolute verdict. --RR */
+ switch (reject->with) {
+ case IP6T_ICMP6_NO_ROUTE:
+ send_unreach(*pskb, ICMPV6_NOROUTE, hooknum);
+ break;
+ case IP6T_ICMP6_ADM_PROHIBITED:
+ send_unreach(*pskb, ICMPV6_ADM_PROHIBITED, hooknum);
+ break;
+ case IP6T_ICMP6_NOT_NEIGHBOUR:
+ send_unreach(*pskb, ICMPV6_NOT_NEIGHBOUR, hooknum);
+ break;
+ case IP6T_ICMP6_ADDR_UNREACH:
+ send_unreach(*pskb, ICMPV6_ADDR_UNREACH, hooknum);
+ break;
+ case IP6T_ICMP6_PORT_UNREACH:
+ send_unreach(*pskb, ICMPV6_PORT_UNREACH, hooknum);
+ break;
+ case IP6T_ICMP6_ECHOREPLY:
+ /* Do nothing */
+ break;
+ case IP6T_TCP_RESET:
+ send_reset(*pskb);
+ break;
+ default:
+ if (net_ratelimit())
+ printk(KERN_WARNING "ip6t_REJECT: case %u not handled yet\n", reject->with);
+ break;
+ }
+
+ return NF_DROP;
+}
+
+static int check(const char *tablename,
+ const struct ip6t_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ const struct ip6t_reject_info *rejinfo = targinfo;
+
+ if (targinfosize != IP6T_ALIGN(sizeof(struct ip6t_reject_info))) {
+ DEBUGP("ip6t_REJECT: targinfosize %u != 0\n", targinfosize);
+ return 0;
+ }
+
+ /* Only allow these for packet filtering. */
+ if (strcmp(tablename, "filter") != 0) {
+ DEBUGP("ip6t_REJECT: bad table `%s'.\n", tablename);
+ return 0;
+ }
+
+ if ((hook_mask & ~((1 << NF_IP6_LOCAL_IN)
+ | (1 << NF_IP6_FORWARD)
+ | (1 << NF_IP6_LOCAL_OUT))) != 0) {
+ DEBUGP("ip6t_REJECT: bad hook mask %X\n", hook_mask);
+ return 0;
+ }
+
+ if (rejinfo->with == IP6T_ICMP6_ECHOREPLY) {
+ printk("ip6t_REJECT: ECHOREPLY is not supported.\n");
+ return 0;
+ } else if (rejinfo->with == IP6T_TCP_RESET) {
+ /* Must specify that it's a TCP packet */
+ if (e->ipv6.proto != IPPROTO_TCP
+ || (e->ipv6.invflags & IP6T_INV_PROTO)) {
+ DEBUGP("ip6t_REJECT: TCP_RESET illegal for non-tcp\n");
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static struct ip6t_target ip6t_reject_reg = {
+ .name = "REJECT",
+ .target = reject6_target,
+ .checkentry = check,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ if (ip6t_register_target(&ip6t_reject_reg))
+ return -EINVAL;
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ ip6t_unregister_target(&ip6t_reject_reg);
+}
+
+module_init(init);
+module_exit(fini);
diff --git a/net/ipv6/netfilter/ip6t_owner.c b/net/ipv6/netfilter/ip6t_owner.c
index ab0e32d3de46..9b91decbfddb 100644
--- a/net/ipv6/netfilter/ip6t_owner.c
+++ b/net/ipv6/netfilter/ip6t_owner.c
@@ -20,71 +20,6 @@ MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
MODULE_DESCRIPTION("IP6 tables owner matching module");
MODULE_LICENSE("GPL");
-static int
-match_pid(const struct sk_buff *skb, pid_t pid)
-{
- struct task_struct *p;
- struct files_struct *files;
- int i;
-
- read_lock(&tasklist_lock);
- p = find_task_by_pid(pid);
- if (!p)
- goto out;
- task_lock(p);
- files = p->files;
- if(files) {
- spin_lock(&files->file_lock);
- for (i=0; i < files->max_fds; i++) {
- if (fcheck_files(files, i) == skb->sk->sk_socket->file) {
- spin_unlock(&files->file_lock);
- task_unlock(p);
- read_unlock(&tasklist_lock);
- return 1;
- }
- }
- spin_unlock(&files->file_lock);
- }
- task_unlock(p);
-out:
- read_unlock(&tasklist_lock);
- return 0;
-}
-
-static int
-match_sid(const struct sk_buff *skb, pid_t sid)
-{
- struct task_struct *g, *p;
- struct file *file = skb->sk->sk_socket->file;
- int i, found=0;
-
- read_lock(&tasklist_lock);
- do_each_thread(g, p) {
- struct files_struct *files;
- if (p->signal->session != sid)
- continue;
-
- task_lock(p);
- files = p->files;
- if (files) {
- spin_lock(&files->file_lock);
- for (i=0; i < files->max_fds; i++) {
- if (fcheck_files(files, i) == file) {
- found = 1;
- break;
- }
- }
- spin_unlock(&files->file_lock);
- }
- task_unlock(p);
- if (found)
- goto out;
- } while_each_thread(g, p);
-out:
- read_unlock(&tasklist_lock);
-
- return found;
-}
static int
match(const struct sk_buff *skb,
@@ -112,18 +47,6 @@ match(const struct sk_buff *skb,
return 0;
}
- if(info->match & IP6T_OWNER_PID) {
- if (!match_pid(skb, info->pid) ^
- !!(info->invert & IP6T_OWNER_PID))
- return 0;
- }
-
- if(info->match & IP6T_OWNER_SID) {
- if (!match_sid(skb, info->sid) ^
- !!(info->invert & IP6T_OWNER_SID))
- return 0;
- }
-
return 1;
}
@@ -134,6 +57,8 @@ checkentry(const char *tablename,
unsigned int matchsize,
unsigned int hook_mask)
{
+ const struct ip6t_owner_info *info = matchinfo;
+
if (hook_mask
& ~((1 << NF_IP6_LOCAL_OUT) | (1 << NF_IP6_POST_ROUTING))) {
printk("ip6t_owner: only valid for LOCAL_OUT or POST_ROUTING.\n");
@@ -142,14 +67,13 @@ checkentry(const char *tablename,
if (matchsize != IP6T_ALIGN(sizeof(struct ip6t_owner_info)))
return 0;
-#ifdef CONFIG_SMP
- /* files->file_lock can not be used in a BH */
- if (((struct ip6t_owner_info *)matchinfo)->match
- & (IP6T_OWNER_PID|IP6T_OWNER_SID)) {
- printk("ip6t_owner: pid and sid matching is broken on SMP.\n");
+
+ if (info->match & (IP6T_OWNER_PID|IP6T_OWNER_SID)) {
+ printk("ipt_owner: pid and sid matching "
+ "not supported anymore\n");
return 0;
}
-#endif
+
return 1;
}
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 1d4d75b34d32..7a5863298f3f 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -49,6 +49,7 @@
#include <net/transp_v6.h>
#include <net/udp.h>
#include <net/inet_common.h>
+#include <net/tcp_states.h>
#include <net/rawv6.h>
#include <net/xfrm.h>
@@ -81,7 +82,8 @@ static void raw_v6_unhash(struct sock *sk)
/* Grumble... icmp and ip_input want to get at this... */
struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
- struct in6_addr *loc_addr, struct in6_addr *rmt_addr)
+ struct in6_addr *loc_addr, struct in6_addr *rmt_addr,
+ int dif)
{
struct hlist_node *node;
int is_multicast = ipv6_addr_is_multicast(loc_addr);
@@ -94,6 +96,9 @@ struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num,
!ipv6_addr_equal(&np->daddr, rmt_addr))
continue;
+ if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)
+ continue;
+
if (!ipv6_addr_any(&np->rcv_saddr)) {
if (ipv6_addr_equal(&np->rcv_saddr, loc_addr))
goto found;
@@ -137,11 +142,12 @@ static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb)
*
* Caller owns SKB so we must make clones.
*/
-void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
+int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
{
struct in6_addr *saddr;
struct in6_addr *daddr;
struct sock *sk;
+ int delivered = 0;
__u8 hash;
saddr = &skb->nh.ipv6h->saddr;
@@ -160,9 +166,10 @@ void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
if (sk == NULL)
goto out;
- sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr);
+ sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, skb->dev->ifindex);
while (sk) {
+ delivered = 1;
if (nexthdr != IPPROTO_ICMPV6 || !icmpv6_filter(sk, skb)) {
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
@@ -170,10 +177,12 @@ void ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
if (clone)
rawv6_rcv(sk, clone);
}
- sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr);
+ sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr,
+ skb->dev->ifindex);
}
out:
read_unlock(&raw_v6_lock);
+ return delivered;
}
/* This cleans up af_inet6 a bit. -DaveM */
@@ -334,8 +343,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
if (csum_ipv6_magic(&skb->nh.ipv6h->saddr,
&skb->nh.ipv6h->daddr,
skb->len, inet->num, skb->csum)) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "raw v6 hw csum failure.\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "raw v6 hw csum failure.\n");
skb->ip_summed = CHECKSUM_NONE;
}
}
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 59e7c6317872..9d9e04344c77 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -562,7 +562,7 @@ static void ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
if (skb->dev)
fq->iif = skb->dev->ifindex;
skb->dev = NULL;
- fq->stamp = skb->stamp;
+ skb_get_timestamp(skb, &fq->stamp);
fq->meat += skb->len;
atomic_add(skb->truesize, &ip6_frag_mem);
@@ -664,7 +664,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in,
head->next = NULL;
head->dev = dev;
- head->stamp = fq->stamp;
+ skb_set_timestamp(head, &fq->stamp);
head->nh.ipv6h->payload_len = htons(payload_len);
*skb_in = head;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 878789b3122d..5d5bbb49ec78 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1372,7 +1372,7 @@ int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
* Drop the packet on the floor
*/
-int ip6_pkt_discard(struct sk_buff *skb)
+static int ip6_pkt_discard(struct sk_buff *skb)
{
IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_NOROUTE, 0, skb->dev);
@@ -1380,7 +1380,7 @@ int ip6_pkt_discard(struct sk_buff *skb)
return 0;
}
-int ip6_pkt_discard_out(struct sk_buff *skb)
+static int ip6_pkt_discard_out(struct sk_buff *skb)
{
skb->dev = skb->dst->dev;
return ip6_pkt_discard(skb);
@@ -1850,16 +1850,16 @@ void inet6_rt_notify(int event, struct rt6_info *rt, struct nlmsghdr *nlh,
skb = alloc_skb(size, gfp_any());
if (!skb) {
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_ROUTE, ENOBUFS);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_ROUTE, ENOBUFS);
return;
}
if (rt6_fill_node(skb, rt, NULL, NULL, 0, event, pid, seq, 0, 0) < 0) {
kfree_skb(skb);
- netlink_set_err(rtnl, 0, RTMGRP_IPV6_ROUTE, EINVAL);
+ netlink_set_err(rtnl, 0, RTNLGRP_IPV6_ROUTE, EINVAL);
return;
}
- NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_ROUTE;
- netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_ROUTE, gfp_any());
+ NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_ROUTE;
+ netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_ROUTE, gfp_any());
}
/*
@@ -1960,8 +1960,6 @@ static int rt6_proc_info(char *buffer, char **start, off_t offset, int length)
return arg.len;
}
-extern struct rt6_statistics rt6_stats;
-
static int rt6_stats_seq_show(struct seq_file *seq, void *v)
{
seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n",
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index e553e5b80d6e..c3123c9e1a8e 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -770,7 +770,7 @@ static int ipip6_tunnel_init(struct net_device *dev)
return 0;
}
-int __init ipip6_fb_tunnel_init(struct net_device *dev)
+static int __init ipip6_fb_tunnel_init(struct net_device *dev)
{
struct ip_tunnel *tunnel = dev->priv;
struct iphdr *iph = &tunnel->parms.iph;
diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index 3a18e0e6ffed..8eff9fa1e983 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -14,9 +14,6 @@
#include <net/ipv6.h>
#include <net/addrconf.h>
-extern ctl_table ipv6_route_table[];
-extern ctl_table ipv6_icmp_table[];
-
#ifdef CONFIG_SYSCTL
static ctl_table ipv6_table[] = {
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index ef29cfd936d3..794734f1d230 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -47,6 +47,7 @@
#include <net/tcp.h>
#include <net/ndisc.h>
+#include <net/inet6_hashtables.h>
#include <net/ipv6.h>
#include <net/transp_v6.h>
#include <net/addrconf.h>
@@ -75,34 +76,11 @@ static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok);
static struct tcp_func ipv6_mapped;
static struct tcp_func ipv6_specific;
-/* I have no idea if this is a good hash for v6 or not. -DaveM */
-static __inline__ int tcp_v6_hashfn(struct in6_addr *laddr, u16 lport,
- struct in6_addr *faddr, u16 fport)
+static inline int tcp_v6_bind_conflict(const struct sock *sk,
+ const struct inet_bind_bucket *tb)
{
- int hashent = (lport ^ fport);
-
- hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]);
- hashent ^= hashent>>16;
- hashent ^= hashent>>8;
- return (hashent & (tcp_ehash_size - 1));
-}
-
-static __inline__ int tcp_v6_sk_hashfn(struct sock *sk)
-{
- struct inet_sock *inet = inet_sk(sk);
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct in6_addr *laddr = &np->rcv_saddr;
- struct in6_addr *faddr = &np->daddr;
- __u16 lport = inet->num;
- __u16 fport = inet->dport;
- return tcp_v6_hashfn(laddr, lport, faddr, fport);
-}
-
-static inline int tcp_v6_bind_conflict(struct sock *sk,
- struct tcp_bind_bucket *tb)
-{
- struct sock *sk2;
- struct hlist_node *node;
+ const struct sock *sk2;
+ const struct hlist_node *node;
/* We must walk the whole port owner list in this case. -DaveM */
sk_for_each_bound(sk2, node, &tb->owners) {
@@ -126,8 +104,8 @@ static inline int tcp_v6_bind_conflict(struct sock *sk,
*/
static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
{
- struct tcp_bind_hashbucket *head;
- struct tcp_bind_bucket *tb;
+ struct inet_bind_hashbucket *head;
+ struct inet_bind_bucket *tb;
struct hlist_node *node;
int ret;
@@ -138,25 +116,25 @@ static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
int remaining = (high - low) + 1;
int rover;
- spin_lock(&tcp_portalloc_lock);
- if (tcp_port_rover < low)
+ spin_lock(&tcp_hashinfo.portalloc_lock);
+ if (tcp_hashinfo.port_rover < low)
rover = low;
else
- rover = tcp_port_rover;
+ rover = tcp_hashinfo.port_rover;
do { rover++;
if (rover > high)
rover = low;
- head = &tcp_bhash[tcp_bhashfn(rover)];
+ head = &tcp_hashinfo.bhash[inet_bhashfn(rover, tcp_hashinfo.bhash_size)];
spin_lock(&head->lock);
- tb_for_each(tb, node, &head->chain)
+ inet_bind_bucket_for_each(tb, node, &head->chain)
if (tb->port == rover)
goto next;
break;
next:
spin_unlock(&head->lock);
} while (--remaining > 0);
- tcp_port_rover = rover;
- spin_unlock(&tcp_portalloc_lock);
+ tcp_hashinfo.port_rover = rover;
+ spin_unlock(&tcp_hashinfo.portalloc_lock);
/* Exhausted local port range during search? It is not
* possible for us to be holding one of the bind hash
@@ -171,9 +149,9 @@ static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
/* OK, here is the one we will use. */
snum = rover;
} else {
- head = &tcp_bhash[tcp_bhashfn(snum)];
+ head = &tcp_hashinfo.bhash[inet_bhashfn(snum, tcp_hashinfo.bhash_size)];
spin_lock(&head->lock);
- tb_for_each(tb, node, &head->chain)
+ inet_bind_bucket_for_each(tb, node, &head->chain)
if (tb->port == snum)
goto tb_found;
}
@@ -192,8 +170,11 @@ tb_found:
}
tb_not_found:
ret = 1;
- if (!tb && (tb = tcp_bucket_create(head, snum)) == NULL)
- goto fail_unlock;
+ if (tb == NULL) {
+ tb = inet_bind_bucket_create(tcp_hashinfo.bind_bucket_cachep, head, snum);
+ if (tb == NULL)
+ goto fail_unlock;
+ }
if (hlist_empty(&tb->owners)) {
if (sk->sk_reuse && sk->sk_state != TCP_LISTEN)
tb->fastreuse = 1;
@@ -204,9 +185,9 @@ tb_not_found:
tb->fastreuse = 0;
success:
- if (!tcp_sk(sk)->bind_hash)
- tcp_bind_hash(sk, tb, snum);
- BUG_TRAP(tcp_sk(sk)->bind_hash == tb);
+ if (!inet_csk(sk)->icsk_bind_hash)
+ inet_bind_hash(sk, tb, snum);
+ BUG_TRAP(inet_csk(sk)->icsk_bind_hash == tb);
ret = 0;
fail_unlock:
@@ -224,13 +205,13 @@ static __inline__ void __tcp_v6_hash(struct sock *sk)
BUG_TRAP(sk_unhashed(sk));
if (sk->sk_state == TCP_LISTEN) {
- list = &tcp_listening_hash[tcp_sk_listen_hashfn(sk)];
- lock = &tcp_lhash_lock;
- tcp_listen_wlock();
+ list = &tcp_hashinfo.listening_hash[inet_sk_listen_hashfn(sk)];
+ lock = &tcp_hashinfo.lhash_lock;
+ inet_listen_wlock(&tcp_hashinfo);
} else {
- sk->sk_hashent = tcp_v6_sk_hashfn(sk);
- list = &tcp_ehash[sk->sk_hashent].chain;
- lock = &tcp_ehash[sk->sk_hashent].lock;
+ sk->sk_hashent = inet6_sk_ehashfn(sk, tcp_hashinfo.ehash_size);
+ list = &tcp_hashinfo.ehash[sk->sk_hashent].chain;
+ lock = &tcp_hashinfo.ehash[sk->sk_hashent].lock;
write_lock(lock);
}
@@ -255,131 +236,11 @@ static void tcp_v6_hash(struct sock *sk)
}
}
-static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned short hnum, int dif)
-{
- struct sock *sk;
- struct hlist_node *node;
- struct sock *result = NULL;
- int score, hiscore;
-
- hiscore=0;
- read_lock(&tcp_lhash_lock);
- sk_for_each(sk, node, &tcp_listening_hash[tcp_lhashfn(hnum)]) {
- if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- score = 1;
- if (!ipv6_addr_any(&np->rcv_saddr)) {
- if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
- continue;
- score++;
- }
- if (sk->sk_bound_dev_if) {
- if (sk->sk_bound_dev_if != dif)
- continue;
- score++;
- }
- if (score == 3) {
- result = sk;
- break;
- }
- if (score > hiscore) {
- hiscore = score;
- result = sk;
- }
- }
- }
- if (result)
- sock_hold(result);
- read_unlock(&tcp_lhash_lock);
- return result;
-}
-
-/* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
- * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
- *
- * The sockhash lock must be held as a reader here.
- */
-
-static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 hnum,
- int dif)
-{
- struct tcp_ehash_bucket *head;
- struct sock *sk;
- struct hlist_node *node;
- __u32 ports = TCP_COMBINED_PORTS(sport, hnum);
- int hash;
-
- /* Optimize here for direct hit, only listening connections can
- * have wildcards anyways.
- */
- hash = tcp_v6_hashfn(daddr, hnum, saddr, sport);
- head = &tcp_ehash[hash];
- read_lock(&head->lock);
- sk_for_each(sk, node, &head->chain) {
- /* For IPV6 do the cheaper port and family tests first. */
- if(TCP_IPV6_MATCH(sk, saddr, daddr, ports, dif))
- goto hit; /* You sunk my battleship! */
- }
- /* Must check for a TIME_WAIT'er before going to listener hash. */
- sk_for_each(sk, node, &(head + tcp_ehash_size)->chain) {
- /* FIXME: acme: check this... */
- struct tcp_tw_bucket *tw = (struct tcp_tw_bucket *)sk;
-
- if(*((__u32 *)&(tw->tw_dport)) == ports &&
- sk->sk_family == PF_INET6) {
- if(ipv6_addr_equal(&tw->tw_v6_daddr, saddr) &&
- ipv6_addr_equal(&tw->tw_v6_rcv_saddr, daddr) &&
- (!sk->sk_bound_dev_if || sk->sk_bound_dev_if == dif))
- goto hit;
- }
- }
- read_unlock(&head->lock);
- return NULL;
-
-hit:
- sock_hold(sk);
- read_unlock(&head->lock);
- return sk;
-}
-
-
-static inline struct sock *__tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 hnum,
- int dif)
-{
- struct sock *sk;
-
- sk = __tcp_v6_lookup_established(saddr, sport, daddr, hnum, dif);
-
- if (sk)
- return sk;
-
- return tcp_v6_lookup_listener(daddr, hnum, dif);
-}
-
-inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 dport,
- int dif)
-{
- struct sock *sk;
-
- local_bh_disable();
- sk = __tcp_v6_lookup(saddr, sport, daddr, ntohs(dport), dif);
- local_bh_enable();
-
- return sk;
-}
-
-EXPORT_SYMBOL_GPL(tcp_v6_lookup);
-
-
/*
* Open request hash tables.
*/
-static u32 tcp_v6_synq_hash(struct in6_addr *raddr, u16 rport, u32 rnd)
+static u32 tcp_v6_synq_hash(const struct in6_addr *raddr, const u16 rport, const u32 rnd)
{
u32 a, b, c;
@@ -399,14 +260,15 @@ static u32 tcp_v6_synq_hash(struct in6_addr *raddr, u16 rport, u32 rnd)
return c & (TCP_SYNQ_HSIZE - 1);
}
-static struct request_sock *tcp_v6_search_req(struct tcp_sock *tp,
+static struct request_sock *tcp_v6_search_req(const struct sock *sk,
struct request_sock ***prevp,
__u16 rport,
struct in6_addr *raddr,
struct in6_addr *laddr,
int iif)
{
- struct listen_sock *lopt = tp->accept_queue.listen_opt;
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
struct request_sock *req, **prev;
for (prev = &lopt->syn_table[tcp_v6_synq_hash(raddr, rport, lopt->hash_rnd)];
@@ -451,44 +313,48 @@ static __u32 tcp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
}
}
-static int __tcp_v6_check_established(struct sock *sk, __u16 lport,
- struct tcp_tw_bucket **twp)
+static int __tcp_v6_check_established(struct sock *sk, const __u16 lport,
+ struct inet_timewait_sock **twp)
{
struct inet_sock *inet = inet_sk(sk);
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct in6_addr *daddr = &np->rcv_saddr;
- struct in6_addr *saddr = &np->daddr;
- int dif = sk->sk_bound_dev_if;
- u32 ports = TCP_COMBINED_PORTS(inet->dport, lport);
- int hash = tcp_v6_hashfn(daddr, inet->num, saddr, inet->dport);
- struct tcp_ehash_bucket *head = &tcp_ehash[hash];
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+ const struct in6_addr *daddr = &np->rcv_saddr;
+ const struct in6_addr *saddr = &np->daddr;
+ const int dif = sk->sk_bound_dev_if;
+ const u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
+ const int hash = inet6_ehashfn(daddr, inet->num, saddr, inet->dport,
+ tcp_hashinfo.ehash_size);
+ struct inet_ehash_bucket *head = &tcp_hashinfo.ehash[hash];
struct sock *sk2;
- struct hlist_node *node;
- struct tcp_tw_bucket *tw;
+ const struct hlist_node *node;
+ struct inet_timewait_sock *tw;
write_lock(&head->lock);
/* Check TIME-WAIT sockets first. */
- sk_for_each(sk2, node, &(head + tcp_ehash_size)->chain) {
- tw = (struct tcp_tw_bucket*)sk2;
+ sk_for_each(sk2, node, &(head + tcp_hashinfo.ehash_size)->chain) {
+ const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk2);
+
+ tw = inet_twsk(sk2);
if(*((__u32 *)&(tw->tw_dport)) == ports &&
sk2->sk_family == PF_INET6 &&
- ipv6_addr_equal(&tw->tw_v6_daddr, saddr) &&
- ipv6_addr_equal(&tw->tw_v6_rcv_saddr, daddr) &&
+ ipv6_addr_equal(&tcp6tw->tw_v6_daddr, saddr) &&
+ ipv6_addr_equal(&tcp6tw->tw_v6_rcv_saddr, daddr) &&
sk2->sk_bound_dev_if == sk->sk_bound_dev_if) {
+ const struct tcp_timewait_sock *tcptw = tcp_twsk(sk2);
struct tcp_sock *tp = tcp_sk(sk);
- if (tw->tw_ts_recent_stamp &&
- (!twp || (sysctl_tcp_tw_reuse &&
- xtime.tv_sec -
- tw->tw_ts_recent_stamp > 1))) {
+ if (tcptw->tw_ts_recent_stamp &&
+ (!twp ||
+ (sysctl_tcp_tw_reuse &&
+ xtime.tv_sec - tcptw->tw_ts_recent_stamp > 1))) {
/* See comment in tcp_ipv4.c */
- tp->write_seq = tw->tw_snd_nxt + 65535 + 2;
+ tp->write_seq = tcptw->tw_snd_nxt + 65535 + 2;
if (!tp->write_seq)
tp->write_seq = 1;
- tp->rx_opt.ts_recent = tw->tw_ts_recent;
- tp->rx_opt.ts_recent_stamp = tw->tw_ts_recent_stamp;
+ tp->rx_opt.ts_recent = tcptw->tw_ts_recent;
+ tp->rx_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
sock_hold(sk2);
goto unique;
} else
@@ -499,7 +365,7 @@ static int __tcp_v6_check_established(struct sock *sk, __u16 lport,
/* And established part... */
sk_for_each(sk2, node, &head->chain) {
- if(TCP_IPV6_MATCH(sk2, saddr, daddr, ports, dif))
+ if (INET6_MATCH(sk2, saddr, daddr, ports, dif))
goto not_unique;
}
@@ -515,10 +381,10 @@ unique:
NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
} else if (tw) {
/* Silly. Should hash-dance instead... */
- tcp_tw_deschedule(tw);
+ inet_twsk_deschedule(tw, &tcp_death_row);
NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
}
return 0;
@@ -540,8 +406,8 @@ static inline u32 tcpv6_port_offset(const struct sock *sk)
static int tcp_v6_hash_connect(struct sock *sk)
{
unsigned short snum = inet_sk(sk)->num;
- struct tcp_bind_hashbucket *head;
- struct tcp_bind_bucket *tb;
+ struct inet_bind_hashbucket *head;
+ struct inet_bind_bucket *tb;
int ret;
if (!snum) {
@@ -553,19 +419,19 @@ static int tcp_v6_hash_connect(struct sock *sk)
static u32 hint;
u32 offset = hint + tcpv6_port_offset(sk);
struct hlist_node *node;
- struct tcp_tw_bucket *tw = NULL;
+ struct inet_timewait_sock *tw = NULL;
local_bh_disable();
for (i = 1; i <= range; i++) {
port = low + (i + offset) % range;
- head = &tcp_bhash[tcp_bhashfn(port)];
+ head = &tcp_hashinfo.bhash[inet_bhashfn(port, tcp_hashinfo.bhash_size)];
spin_lock(&head->lock);
/* Does not bother with rcv_saddr checks,
* because the established check is already
* unique enough.
*/
- tb_for_each(tb, node, &head->chain) {
+ inet_bind_bucket_for_each(tb, node, &head->chain) {
if (tb->port == port) {
BUG_TRAP(!hlist_empty(&tb->owners));
if (tb->fastreuse >= 0)
@@ -578,7 +444,7 @@ static int tcp_v6_hash_connect(struct sock *sk)
}
}
- tb = tcp_bucket_create(head, port);
+ tb = inet_bind_bucket_create(tcp_hashinfo.bind_bucket_cachep, head, port);
if (!tb) {
spin_unlock(&head->lock);
break;
@@ -597,7 +463,7 @@ ok:
hint += i;
/* Head lock still held and bh's disabled */
- tcp_bind_hash(sk, tb, port);
+ inet_bind_hash(sk, tb, port);
if (sk_unhashed(sk)) {
inet_sk(sk)->sport = htons(port);
__tcp_v6_hash(sk);
@@ -605,16 +471,16 @@ ok:
spin_unlock(&head->lock);
if (tw) {
- tcp_tw_deschedule(tw);
- tcp_tw_put(tw);
+ inet_twsk_deschedule(tw, &tcp_death_row);
+ inet_twsk_put(tw);
}
ret = 0;
goto out;
}
- head = &tcp_bhash[tcp_bhashfn(snum)];
- tb = tcp_sk(sk)->bind_hash;
+ head = &tcp_hashinfo.bhash[inet_bhashfn(snum, tcp_hashinfo.bhash_size)];
+ tb = inet_csk(sk)->icsk_bind_hash;
spin_lock_bh(&head->lock);
if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {
@@ -631,11 +497,6 @@ out:
}
}
-static __inline__ int tcp_v6_iif(struct sk_buff *skb)
-{
- return IP6CB(skb)->iif;
-}
-
static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
@@ -827,14 +688,15 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
int type, int code, int offset, __u32 info)
{
struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
- struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
+ const struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
struct ipv6_pinfo *np;
struct sock *sk;
int err;
struct tcp_sock *tp;
__u32 seq;
- sk = tcp_v6_lookup(&hdr->daddr, th->dest, &hdr->saddr, th->source, skb->dev->ifindex);
+ sk = inet6_lookup(&tcp_hashinfo, &hdr->daddr, th->dest, &hdr->saddr,
+ th->source, skb->dev->ifindex);
if (sk == NULL) {
ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
@@ -842,7 +704,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
}
if (sk->sk_state == TCP_TIME_WAIT) {
- tcp_tw_put((struct tcp_tw_bucket*)sk);
+ inet_twsk_put((struct inet_timewait_sock *)sk);
return;
}
@@ -920,8 +782,8 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if (sock_owned_by_user(sk))
goto out;
- req = tcp_v6_search_req(tp, &prev, th->dest, &hdr->daddr,
- &hdr->saddr, tcp_v6_iif(skb));
+ req = tcp_v6_search_req(sk, &prev, th->dest, &hdr->daddr,
+ &hdr->saddr, inet6_iif(skb));
if (!req)
goto out;
@@ -935,7 +797,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
goto out;
}
- tcp_synq_drop(sk, req, prev);
+ inet_csk_reqsk_queue_drop(sk, req, prev);
goto out;
case TCP_SYN_SENT:
@@ -1132,7 +994,7 @@ static void tcp_v6_send_reset(struct sk_buff *skb)
buff->csum);
fl.proto = IPPROTO_TCP;
- fl.oif = tcp_v6_iif(skb);
+ fl.oif = inet6_iif(skb);
fl.fl_ip_dport = t1->dest;
fl.fl_ip_sport = t1->source;
@@ -1201,7 +1063,7 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32
buff->csum);
fl.proto = IPPROTO_TCP;
- fl.oif = tcp_v6_iif(skb);
+ fl.oif = inet6_iif(skb);
fl.fl_ip_dport = t1->dest;
fl.fl_ip_sport = t1->source;
@@ -1220,12 +1082,14 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32
static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
{
- struct tcp_tw_bucket *tw = (struct tcp_tw_bucket *)sk;
+ struct inet_timewait_sock *tw = inet_twsk(sk);
+ const struct tcp_timewait_sock *tcptw = tcp_twsk(sk);
- tcp_v6_send_ack(skb, tw->tw_snd_nxt, tw->tw_rcv_nxt,
- tw->tw_rcv_wnd >> tw->tw_rcv_wscale, tw->tw_ts_recent);
+ tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
+ tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
+ tcptw->tw_ts_recent);
- tcp_tw_put(tw);
+ inet_twsk_put(tw);
}
static void tcp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
@@ -1237,28 +1101,25 @@ static void tcp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
{
struct request_sock *req, **prev;
- struct tcphdr *th = skb->h.th;
- struct tcp_sock *tp = tcp_sk(sk);
+ const struct tcphdr *th = skb->h.th;
struct sock *nsk;
/* Find possible connection requests. */
- req = tcp_v6_search_req(tp, &prev, th->source, &skb->nh.ipv6h->saddr,
- &skb->nh.ipv6h->daddr, tcp_v6_iif(skb));
+ req = tcp_v6_search_req(sk, &prev, th->source, &skb->nh.ipv6h->saddr,
+ &skb->nh.ipv6h->daddr, inet6_iif(skb));
if (req)
return tcp_check_req(sk, skb, req, prev);
- nsk = __tcp_v6_lookup_established(&skb->nh.ipv6h->saddr,
- th->source,
- &skb->nh.ipv6h->daddr,
- ntohs(th->dest),
- tcp_v6_iif(skb));
+ nsk = __inet6_lookup_established(&tcp_hashinfo, &skb->nh.ipv6h->saddr,
+ th->source, &skb->nh.ipv6h->daddr,
+ ntohs(th->dest), inet6_iif(skb));
if (nsk) {
if (nsk->sk_state != TCP_TIME_WAIT) {
bh_lock_sock(nsk);
return nsk;
}
- tcp_tw_put((struct tcp_tw_bucket*)nsk);
+ inet_twsk_put((struct inet_timewait_sock *)nsk);
return NULL;
}
@@ -1271,12 +1132,12 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
static void tcp_v6_synq_add(struct sock *sk, struct request_sock *req)
{
- struct tcp_sock *tp = tcp_sk(sk);
- struct listen_sock *lopt = tp->accept_queue.listen_opt;
- u32 h = tcp_v6_synq_hash(&tcp6_rsk(req)->rmt_addr, inet_rsk(req)->rmt_port, lopt->hash_rnd);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
+ const u32 h = tcp_v6_synq_hash(&tcp6_rsk(req)->rmt_addr, inet_rsk(req)->rmt_port, lopt->hash_rnd);
- reqsk_queue_hash_req(&tp->accept_queue, h, req, TCP_TIMEOUT_INIT);
- tcp_synq_added(sk);
+ reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, TCP_TIMEOUT_INIT);
+ inet_csk_reqsk_queue_added(sk, TCP_TIMEOUT_INIT);
}
@@ -1301,13 +1162,13 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
/*
* There are no SYN attacks on IPv6, yet...
*/
- if (tcp_synq_is_full(sk) && !isn) {
+ if (inet_csk_reqsk_queue_is_full(sk) && !isn) {
if (net_ratelimit())
printk(KERN_INFO "TCPv6: dropping request, synflood is possible\n");
goto drop;
}
- if (sk_acceptq_is_full(sk) && tcp_synq_young(sk) > 1)
+ if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
goto drop;
req = reqsk_alloc(&tcp6_request_sock_ops);
@@ -1339,7 +1200,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
/* So that link locals have meaning */
if (!sk->sk_bound_dev_if &&
ipv6_addr_type(&treq->rmt_addr) & IPV6_ADDR_LINKLOCAL)
- treq->iif = tcp_v6_iif(skb);
+ treq->iif = inet6_iif(skb);
if (isn == 0)
isn = tcp_v6_init_sequence(sk,skb);
@@ -1404,15 +1265,14 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newsk->sk_backlog_rcv = tcp_v4_do_rcv;
newnp->pktoptions = NULL;
newnp->opt = NULL;
- newnp->mcast_oif = tcp_v6_iif(skb);
+ newnp->mcast_oif = inet6_iif(skb);
newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
- /* Charge newly allocated IPv6 socket. Though it is mapped,
- * it is IPv6 yet.
+ /*
+ * No need to charge this sock to the relevant IPv6 refcnt debug socks count
+ * here, tcp_create_openreq_child now does this for us, see the comment in
+ * that function for the gory details. -acme
*/
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet6_sock_nr);
-#endif
/* It is tricky place. Until this moment IPv4 tcp
worked with IPv6 af_tcp.af_specific.
@@ -1467,10 +1327,11 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
if (newsk == NULL)
goto out;
- /* Charge newly allocated IPv6 socket */
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet6_sock_nr);
-#endif
+ /*
+ * No need to charge this sock to the relevant IPv6 refcnt debug socks
+ * count here, tcp_create_openreq_child now does this for us, see the
+ * comment in that function for the gory details. -acme
+ */
ip6_dst_store(newsk, dst, NULL);
newsk->sk_route_caps = dst->dev->features &
@@ -1509,7 +1370,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
skb_set_owner_r(newnp->pktoptions, newsk);
}
newnp->opt = NULL;
- newnp->mcast_oif = tcp_v6_iif(skb);
+ newnp->mcast_oif = inet6_iif(skb);
newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
/* Clone native IPv6 options from listening socket (if any)
@@ -1536,7 +1397,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newinet->daddr = newinet->saddr = newinet->rcv_saddr = LOOPBACK4_IPV6;
__tcp_v6_hash(newsk);
- tcp_inherit_port(sk, newsk);
+ inet_inherit_port(&tcp_hashinfo, sk, newsk);
return newsk;
@@ -1557,7 +1418,7 @@ static int tcp_v6_checksum_init(struct sk_buff *skb)
if (!tcp_v6_check(skb->h.th,skb->len,&skb->nh.ipv6h->saddr,
&skb->nh.ipv6h->daddr,skb->csum))
return 0;
- LIMIT_NETDEBUG(printk(KERN_DEBUG "hw tcp v6 csum failed\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "hw tcp v6 csum failed\n");
}
if (skb->len <= 76) {
if (tcp_v6_check(skb->h.th,skb->len,&skb->nh.ipv6h->saddr,
@@ -1684,7 +1545,7 @@ ipv6_pktoptions:
if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt &&
!((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
if (np->rxopt.bits.rxinfo)
- np->mcast_oif = tcp_v6_iif(opt_skb);
+ np->mcast_oif = inet6_iif(opt_skb);
if (np->rxopt.bits.rxhlim)
np->mcast_hops = opt_skb->nh.ipv6h->hop_limit;
if (ipv6_opt_accepted(sk, opt_skb)) {
@@ -1739,8 +1600,9 @@ static int tcp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(skb->nh.ipv6h);
TCP_SKB_CB(skb)->sacked = 0;
- sk = __tcp_v6_lookup(&skb->nh.ipv6h->saddr, th->source,
- &skb->nh.ipv6h->daddr, ntohs(th->dest), tcp_v6_iif(skb));
+ sk = __inet6_lookup(&tcp_hashinfo, &skb->nh.ipv6h->saddr, th->source,
+ &skb->nh.ipv6h->daddr, ntohs(th->dest),
+ inet6_iif(skb));
if (!sk)
goto no_tcp_socket;
@@ -1795,26 +1657,29 @@ discard_and_relse:
do_time_wait:
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- tcp_tw_put((struct tcp_tw_bucket *) sk);
+ inet_twsk_put((struct inet_timewait_sock *)sk);
goto discard_it;
}
if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) {
TCP_INC_STATS_BH(TCP_MIB_INERRS);
- tcp_tw_put((struct tcp_tw_bucket *) sk);
+ inet_twsk_put((struct inet_timewait_sock *)sk);
goto discard_it;
}
- switch(tcp_timewait_state_process((struct tcp_tw_bucket *)sk,
- skb, th, skb->len)) {
+ switch (tcp_timewait_state_process((struct inet_timewait_sock *)sk,
+ skb, th)) {
case TCP_TW_SYN:
{
struct sock *sk2;
- sk2 = tcp_v6_lookup_listener(&skb->nh.ipv6h->daddr, ntohs(th->dest), tcp_v6_iif(skb));
+ sk2 = inet6_lookup_listener(&tcp_hashinfo,
+ &skb->nh.ipv6h->daddr,
+ ntohs(th->dest), inet6_iif(skb));
if (sk2 != NULL) {
- tcp_tw_deschedule((struct tcp_tw_bucket *)sk);
- tcp_tw_put((struct tcp_tw_bucket *)sk);
+ struct inet_timewait_sock *tw = inet_twsk(sk);
+ inet_twsk_deschedule(tw, &tcp_death_row);
+ inet_twsk_put(tw);
sk = sk2;
goto process;
}
@@ -1983,7 +1848,7 @@ static struct tcp_func ipv6_specific = {
static struct tcp_func ipv6_mapped = {
.queue_xmit = ip_queue_xmit,
.send_check = tcp_v4_send_check,
- .rebuild_header = tcp_v4_rebuild_header,
+ .rebuild_header = inet_sk_rebuild_header,
.conn_request = tcp_v6_conn_request,
.syn_recv_sock = tcp_v6_syn_recv_sock,
.remember_stamp = tcp_v4_remember_stamp,
@@ -2002,13 +1867,14 @@ static struct tcp_func ipv6_mapped = {
*/
static int tcp_v6_init_sock(struct sock *sk)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct tcp_sock *tp = tcp_sk(sk);
skb_queue_head_init(&tp->out_of_order_queue);
tcp_init_xmit_timers(sk);
tcp_prequeue_init(tp);
- tp->rto = TCP_TIMEOUT_INIT;
+ icsk->icsk_rto = TCP_TIMEOUT_INIT;
tp->mdev = TCP_TIMEOUT_INIT;
/* So many TCP implementations out there (incorrectly) count the
@@ -2030,7 +1896,7 @@ static int tcp_v6_init_sock(struct sock *sk)
sk->sk_state = TCP_CLOSE;
tp->af_specific = &ipv6_specific;
- tp->ca_ops = &tcp_init_congestion_ops;
+ icsk->icsk_ca_ops = &tcp_init_congestion_ops;
sk->sk_write_space = sk_stream_write_space;
sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
@@ -2044,8 +1910,6 @@ static int tcp_v6_init_sock(struct sock *sk)
static int tcp_v6_destroy_sock(struct sock *sk)
{
- extern int tcp_v4_destroy_sock(struct sock *sk);
-
tcp_v4_destroy_sock(sk);
return inet6_destroy_sock(sk);
}
@@ -2091,18 +1955,20 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
unsigned long timer_expires;
struct inet_sock *inet = inet_sk(sp);
struct tcp_sock *tp = tcp_sk(sp);
+ const struct inet_connection_sock *icsk = inet_csk(sp);
struct ipv6_pinfo *np = inet6_sk(sp);
dest = &np->daddr;
src = &np->rcv_saddr;
destp = ntohs(inet->dport);
srcp = ntohs(inet->sport);
- if (tp->pending == TCP_TIME_RETRANS) {
+
+ if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
timer_active = 1;
- timer_expires = tp->timeout;
- } else if (tp->pending == TCP_TIME_PROBE0) {
+ timer_expires = icsk->icsk_timeout;
+ } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
timer_active = 4;
- timer_expires = tp->timeout;
+ timer_expires = icsk->icsk_timeout;
} else if (timer_pending(&sp->sk_timer)) {
timer_active = 2;
timer_expires = sp->sk_timer.expires;
@@ -2123,28 +1989,31 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i)
tp->write_seq-tp->snd_una, tp->rcv_nxt-tp->copied_seq,
timer_active,
jiffies_to_clock_t(timer_expires - jiffies),
- tp->retransmits,
+ icsk->icsk_retransmits,
sock_i_uid(sp),
- tp->probes_out,
+ icsk->icsk_probes_out,
sock_i_ino(sp),
atomic_read(&sp->sk_refcnt), sp,
- tp->rto, tp->ack.ato, (tp->ack.quick<<1)|tp->ack.pingpong,
+ icsk->icsk_rto,
+ icsk->icsk_ack.ato,
+ (icsk->icsk_ack.quick << 1 ) | icsk->icsk_ack.pingpong,
tp->snd_cwnd, tp->snd_ssthresh>=0xFFFF?-1:tp->snd_ssthresh
);
}
static void get_timewait6_sock(struct seq_file *seq,
- struct tcp_tw_bucket *tw, int i)
+ struct inet_timewait_sock *tw, int i)
{
struct in6_addr *dest, *src;
__u16 destp, srcp;
+ struct tcp6_timewait_sock *tcp6tw = tcp6_twsk((struct sock *)tw);
int ttd = tw->tw_ttd - jiffies;
if (ttd < 0)
ttd = 0;
- dest = &tw->tw_v6_daddr;
- src = &tw->tw_v6_rcv_saddr;
+ dest = &tcp6tw->tw_v6_daddr;
+ src = &tcp6tw->tw_v6_rcv_saddr;
destp = ntohs(tw->tw_dport);
srcp = ntohs(tw->tw_sport);
@@ -2219,7 +2088,7 @@ struct proto tcpv6_prot = {
.close = tcp_close,
.connect = tcp_v6_connect,
.disconnect = tcp_disconnect,
- .accept = tcp_accept,
+ .accept = inet_csk_accept,
.ioctl = tcp_ioctl,
.init = tcp_v6_init_sock,
.destroy = tcp_v6_destroy_sock,
@@ -2236,11 +2105,13 @@ struct proto tcpv6_prot = {
.sockets_allocated = &tcp_sockets_allocated,
.memory_allocated = &tcp_memory_allocated,
.memory_pressure = &tcp_memory_pressure,
+ .orphan_count = &tcp_orphan_count,
.sysctl_mem = sysctl_tcp_mem,
.sysctl_wmem = sysctl_tcp_wmem,
.sysctl_rmem = sysctl_tcp_rmem,
.max_header = MAX_TCP_HEADER,
.obj_size = sizeof(struct tcp6_sock),
+ .twsk_obj_size = sizeof(struct tcp6_timewait_sock),
.rsk_prot = &tcp6_request_sock_ops,
};
@@ -2250,8 +2121,6 @@ static struct inet6_protocol tcpv6_protocol = {
.flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
};
-extern struct proto_ops inet6_stream_ops;
-
static struct inet_protosw tcpv6_protosw = {
.type = SOCK_STREAM,
.protocol = IPPROTO_TCP,
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index eff050ac7049..390d750449ce 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -51,6 +51,7 @@
#include <net/udp.h>
#include <net/raw.h>
#include <net/inet_common.h>
+#include <net/tcp_states.h>
#include <net/ip6_checksum.h>
#include <net/xfrm.h>
@@ -58,7 +59,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6);
+DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
/* Grrr, addr_type already calculated by caller, but I don't want
* to add some silly "cookie" argument to this method just for that.
@@ -477,8 +478,7 @@ static int udpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
/* RFC 2460 section 8.1 says that we SHOULD log
this error. Well, it is reasonable.
*/
- LIMIT_NETDEBUG(
- printk(KERN_INFO "IPv6: udp checksum is 0\n"));
+ LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n");
goto discard;
}
@@ -493,7 +493,7 @@ static int udpv6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
if (skb->ip_summed==CHECKSUM_HW) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (csum_ipv6_magic(saddr, daddr, ulen, IPPROTO_UDP, skb->csum)) {
- LIMIT_NETDEBUG(printk(KERN_DEBUG "udp v6 hw csum failure.\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "udp v6 hw csum failure.\n");
skb->ip_summed = CHECKSUM_NONE;
}
}
@@ -825,7 +825,7 @@ back_from_confirm:
/* ... which is an evident application bug. --ANK */
release_sock(sk);
- LIMIT_NETDEBUG(printk(KERN_DEBUG "udp cork app bug 2\n"));
+ LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n");
err = -EINVAL;
goto out;
}
@@ -1054,8 +1054,6 @@ struct proto udpv6_prot = {
.obj_size = sizeof(struct udp6_sock),
};
-extern struct proto_ops inet6_dgram_ops;
-
static struct inet_protosw udpv6_protosw = {
.type = SOCK_DGRAM,
.protocol = IPPROTO_UDP,
diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index 60c26c87277e..fbef7826a74f 100644
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -79,7 +79,7 @@ static u32 xfrm6_tunnel_spi;
#define XFRM6_TUNNEL_SPI_MIN 1
#define XFRM6_TUNNEL_SPI_MAX 0xffffffff
-static kmem_cache_t *xfrm6_tunnel_spi_kmem;
+static kmem_cache_t *xfrm6_tunnel_spi_kmem __read_mostly;
#define XFRM6_TUNNEL_SPI_BYADDR_HSIZE 256
#define XFRM6_TUNNEL_SPI_BYSPI_HSIZE 256
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index 5a27e5df5886..34b3bb868409 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -44,7 +44,6 @@
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/string.h>
-#include <linux/tcp.h>
#include <linux/types.h>
#include <linux/termios.h>
@@ -52,6 +51,7 @@
#include <net/p8022.h>
#include <net/psnap.h>
#include <net/sock.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
@@ -1627,7 +1627,7 @@ out:
return rc;
}
-static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int ipx_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
/* NULL here for pt means the packet was looped back */
struct ipx_interface *intrfc;
@@ -1796,8 +1796,8 @@ static int ipx_recvmsg(struct kiocb *iocb, struct socket *sock,
copied);
if (rc)
goto out_free;
- if (skb->stamp.tv_sec)
- sk->sk_stamp = skb->stamp;
+ if (skb->tstamp.off_sec)
+ skb_get_timestamp(skb, &sk->sk_stamp);
msg->msg_namelen = sizeof(*sipx);
@@ -1940,9 +1940,7 @@ static struct notifier_block ipx_dev_notifier = {
};
extern struct datalink_proto *make_EII_client(void);
-extern struct datalink_proto *make_8023_client(void);
extern void destroy_EII_client(struct datalink_proto *);
-extern void destroy_8023_client(struct datalink_proto *);
static unsigned char ipx_8022_type = 0xE0;
static unsigned char ipx_snap_id[5] = { 0x0, 0x0, 0x0, 0x81, 0x37 };
diff --git a/net/ipx/ipx_proc.c b/net/ipx/ipx_proc.c
index b6761913445a..1f73d9ea434d 100644
--- a/net/ipx/ipx_proc.c
+++ b/net/ipx/ipx_proc.c
@@ -10,7 +10,7 @@
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/seq_file.h>
-#include <linux/tcp.h>
+#include <net/tcp_states.h>
#include <net/ipx.h>
static __inline__ struct ipx_interface *ipx_get_interface_idx(loff_t pos)
diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index 92c6e8d4e731..6f92f9c62990 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -56,7 +56,7 @@
#include <asm/uaccess.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/irda/af_irda.h>
diff --git a/net/irda/irlap_frame.c b/net/irda/irlap_frame.c
index 6dafbb43b529..3e9a06abbdd0 100644
--- a/net/irda/irlap_frame.c
+++ b/net/irda/irlap_frame.c
@@ -988,9 +988,6 @@ void irlap_resend_rejected_frames(struct irlap_cb *self, int command)
IRDA_DEBUG(0, "%s(), unable to copy\n", __FUNCTION__);
return;
}
- /* Unlink tx_skb from list */
- tx_skb->next = tx_skb->prev = NULL;
- tx_skb->list = NULL;
/* Clear old Nr field + poll bit */
tx_skb->data[1] &= 0x0f;
@@ -1063,9 +1060,6 @@ void irlap_resend_rejected_frame(struct irlap_cb *self, int command)
IRDA_DEBUG(0, "%s(), unable to copy\n", __FUNCTION__);
return;
}
- /* Unlink tx_skb from list */
- tx_skb->next = tx_skb->prev = NULL;
- tx_skb->list = NULL;
/* Clear old Nr field + poll bit */
tx_skb->data[1] &= 0x0f;
@@ -1309,7 +1303,7 @@ static void irlap_recv_test_frame(struct irlap_cb *self, struct sk_buff *skb,
* Jean II
*/
int irlap_driver_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype)
+ struct packet_type *ptype, struct net_device *orig_dev)
{
struct irlap_info info;
struct irlap_cb *self;
diff --git a/net/irda/irlmp.c b/net/irda/irlmp.c
index 7a4a4d7fbe66..c19e9ce05a3a 100644
--- a/net/irda/irlmp.c
+++ b/net/irda/irlmp.c
@@ -53,7 +53,6 @@ struct irlmp_cb *irlmp = NULL;
/* These can be altered by the sysctl interface */
int sysctl_discovery = 0;
int sysctl_discovery_timeout = 3; /* 3 seconds by default */
-EXPORT_SYMBOL(sysctl_discovery_timeout);
int sysctl_discovery_slots = 6; /* 6 slots by default */
int sysctl_lap_keepalive_time = LM_IDLE_TIMEOUT * 1000 / HZ;
char sysctl_devname[65];
@@ -67,7 +66,6 @@ const char *irlmp_reasons[] = {
"LM_INIT_DISCONNECT",
"ERROR, NOT USED",
};
-EXPORT_SYMBOL(irlmp_reasons);
/*
* Function irlmp_init (void)
@@ -675,7 +673,6 @@ struct lsap_cb *irlmp_dup(struct lsap_cb *orig, void *instance)
return new;
}
-EXPORT_SYMBOL(irlmp_dup);
/*
* Function irlmp_disconnect_request (handle, userdata)
diff --git a/net/irda/irmod.c b/net/irda/irmod.c
index 6ffaed4544e9..634901dd156f 100644
--- a/net/irda/irmod.c
+++ b/net/irda/irmod.c
@@ -54,7 +54,7 @@ extern int irsock_init(void);
extern void irsock_cleanup(void);
/* irlap_frame.c */
extern int irlap_driver_rcv(struct sk_buff *, struct net_device *,
- struct packet_type *);
+ struct packet_type *, struct net_device *);
/*
* Module parameters
diff --git a/net/irda/irnet/irnet.h b/net/irda/irnet/irnet.h
index 9004f7349a76..b391cb3893d4 100644
--- a/net/irda/irnet/irnet.h
+++ b/net/irda/irnet/irnet.h
@@ -517,9 +517,6 @@ extern int
irda_irnet_init(void); /* Initialise IrDA part of IrNET */
extern void
irda_irnet_cleanup(void); /* Teardown IrDA part of IrNET */
-/* ---------------------------- MODULE ---------------------------- */
-extern int
- irnet_init(void); /* Initialise IrNET module */
/**************************** VARIABLES ****************************/
diff --git a/net/irda/irnet/irnet_ppp.c b/net/irda/irnet/irnet_ppp.c
index f8f984bb9922..e53bf9e0053e 100644
--- a/net/irda/irnet/irnet_ppp.c
+++ b/net/irda/irnet/irnet_ppp.c
@@ -1107,7 +1107,7 @@ ppp_irnet_cleanup(void)
/*
* Module main entry point
*/
-int __init
+static int __init
irnet_init(void)
{
int err;
diff --git a/net/irda/irqueue.c b/net/irda/irqueue.c
index b0dd3ea35999..1ba8c7106639 100644
--- a/net/irda/irqueue.c
+++ b/net/irda/irqueue.c
@@ -822,7 +822,6 @@ void* hashbin_find_next( hashbin_t* hashbin, long hashv, const char* name,
return entry;
}
-EXPORT_SYMBOL(hashbin_find_next);
/*
* Function hashbin_get_first (hashbin)
diff --git a/net/lapb/lapb_subr.c b/net/lapb/lapb_subr.c
index 5de05a0bc0ff..8b5eefd70f03 100644
--- a/net/lapb/lapb_subr.c
+++ b/net/lapb/lapb_subr.c
@@ -78,7 +78,7 @@ void lapb_requeue_frames(struct lapb_cb *lapb)
if (!skb_prev)
skb_queue_head(&lapb->write_queue, skb);
else
- skb_append(skb_prev, skb);
+ skb_append(skb_prev, skb, &lapb->write_queue);
skb_prev = skb;
}
}
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 20b4cfebd74c..66f55e514b56 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -23,13 +23,13 @@
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/tcp.h>
#include <linux/rtnetlink.h>
#include <linux/init.h>
#include <net/llc.h>
#include <net/llc_sap.h>
#include <net/llc_pdu.h>
#include <net/llc_conn.h>
+#include <net/tcp_states.h>
/* remember: uninitialized global data is zeroed because its in .bss */
static u16 llc_ui_sap_last_autoport = LLC_SAP_DYN_START;
@@ -714,7 +714,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
if (uaddr)
memcpy(uaddr, llc_ui_skb_cb(skb), sizeof(*uaddr));
msg->msg_namelen = sizeof(*uaddr);
- if (!skb->list) {
+ if (!skb->next) {
dgram_free:
kfree_skb(skb);
}
diff --git a/net/llc/llc_conn.c b/net/llc/llc_conn.c
index eba812a9c69c..4c644bc70eae 100644
--- a/net/llc/llc_conn.c
+++ b/net/llc/llc_conn.c
@@ -16,7 +16,7 @@
#include <net/llc_sap.h>
#include <net/llc_conn.h>
#include <net/sock.h>
-#include <linux/tcp.h>
+#include <net/tcp_states.h>
#include <net/llc_c_ev.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_st.h>
@@ -71,7 +71,11 @@ int llc_conn_state_process(struct sock *sk, struct sk_buff *skb)
if (!ev->ind_prim && !ev->cfm_prim) {
/* indicate or confirm not required */
- if (!skb->list)
+ /* XXX this is not very pretty, perhaps we should store
+ * XXX indicate/confirm-needed state in the llc_conn_state_ev
+ * XXX control block of the SKB instead? -DaveM
+ */
+ if (!skb->next)
goto out_kfree_skb;
goto out_skb_put;
}
diff --git a/net/llc/llc_core.c b/net/llc/llc_core.c
index 5ff02c080a0b..9727455bf0e7 100644
--- a/net/llc/llc_core.c
+++ b/net/llc/llc_core.c
@@ -103,7 +103,8 @@ out:
struct llc_sap *llc_sap_open(unsigned char lsap,
int (*func)(struct sk_buff *skb,
struct net_device *dev,
- struct packet_type *pt))
+ struct packet_type *pt,
+ struct net_device *orig_dev))
{
struct llc_sap *sap = llc_sap_find(lsap);
diff --git a/net/llc/llc_if.c b/net/llc/llc_if.c
index 0f9fc48aeaf9..0f84f66018e4 100644
--- a/net/llc/llc_if.c
+++ b/net/llc/llc_if.c
@@ -15,7 +15,6 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
-#include <linux/tcp.h>
#include <asm/errno.h>
#include <net/llc_if.h>
#include <net/llc_sap.h>
@@ -25,6 +24,7 @@
#include <net/llc_c_ev.h>
#include <net/llc_c_ac.h>
#include <net/llc_c_st.h>
+#include <net/tcp_states.h>
u8 llc_mac_null_var[IFHWADDRLEN];
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index 4da6976efc9c..13b46240b7a1 100644
--- a/net/llc/llc_input.c
+++ b/net/llc/llc_input.c
@@ -132,7 +132,7 @@ static inline int llc_fixup_skb(struct sk_buff *skb)
* data now), it queues this frame in the connection's backlog.
*/
int llc_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt)
+ struct packet_type *pt, struct net_device *orig_dev)
{
struct llc_sap *sap;
struct llc_pdu_sn *pdu;
@@ -165,7 +165,7 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev,
* LLC functionality
*/
if (sap->rcv_func) {
- sap->rcv_func(skb, dev, pt);
+ sap->rcv_func(skb, dev, pt, orig_dev);
goto out;
}
dest = llc_pdu_type(skb);
diff --git a/net/llc/llc_sap.c b/net/llc/llc_sap.c
index 965c94eb4bbc..34228ef14985 100644
--- a/net/llc/llc_sap.c
+++ b/net/llc/llc_sap.c
@@ -21,7 +21,7 @@
#include <net/llc_s_ev.h>
#include <net/llc_s_st.h>
#include <net/sock.h>
-#include <linux/tcp.h>
+#include <net/tcp_states.h>
#include <linux/llc.h>
/**
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
new file mode 100644
index 000000000000..8296b38bf270
--- /dev/null
+++ b/net/netfilter/Kconfig
@@ -0,0 +1,24 @@
+config NETFILTER_NETLINK
+ tristate "Netfilter netlink interface"
+ help
+ If this option is enabled, the kernel will include support
+ for the new netfilter netlink interface.
+
+config NETFILTER_NETLINK_QUEUE
+ tristate "Netfilter NFQUEUE over NFNETLINK interface"
+ depends on NETFILTER_NETLINK
+ help
+ If this option isenabled, the kernel will include support
+ for queueing packets via NFNETLINK.
+
+config NETFILTER_NETLINK_LOG
+ tristate "Netfilter LOG over NFNETLINK interface"
+ depends on NETFILTER_NETLINK
+ help
+ If this option is enabled, the kernel will include support
+ for logging packets via NFNETLINK.
+
+ This obsoletes the existing ipt_ULOG and ebg_ulog mechanisms,
+ and is also scheduled to replace the old syslog-based ipt_LOG
+ and ip6t_LOG modules.
+
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
new file mode 100644
index 000000000000..b3b44f8b415a
--- /dev/null
+++ b/net/netfilter/Makefile
@@ -0,0 +1,7 @@
+netfilter-objs := core.o nf_log.o nf_queue.o nf_sockopt.o
+
+obj-$(CONFIG_NETFILTER) = netfilter.o
+
+obj-$(CONFIG_NETFILTER_NETLINK) += nfnetlink.o
+obj-$(CONFIG_NETFILTER_NETLINK_QUEUE) += nfnetlink_queue.o
+obj-$(CONFIG_NETFILTER_NETLINK_LOG) += nfnetlink_log.o
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
new file mode 100644
index 000000000000..1ceb1a6c254b
--- /dev/null
+++ b/net/netfilter/core.c
@@ -0,0 +1,216 @@
+/* netfilter.c: look after the filters for various protocols.
+ * Heavily influenced by the old firewall.c by David Bonn and Alan Cox.
+ *
+ * Thanks to Rob `CmdrTaco' Malda for not influencing this code in any
+ * way.
+ *
+ * Rusty Russell (C)2000 -- This code is GPL.
+ *
+ * February 2000: Modified by James Morris to have 1 queue per protocol.
+ * 15-Mar-2000: Added NF_REPEAT --RR.
+ * 08-May-2003: Internal logging interface added by Jozsef Kadlecsik.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/netfilter.h>
+#include <net/protocol.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/proc_fs.h>
+#include <net/sock.h>
+
+#include "nf_internals.h"
+
+/* In this code, we can be waiting indefinitely for userspace to
+ * service a packet if a hook returns NF_QUEUE. We could keep a count
+ * of skbuffs queued for userspace, and not deregister a hook unless
+ * this is zero, but that sucks. Now, we simply check when the
+ * packets come back: if the hook is gone, the packet is discarded. */
+struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
+EXPORT_SYMBOL(nf_hooks);
+static DEFINE_SPINLOCK(nf_hook_lock);
+
+int nf_register_hook(struct nf_hook_ops *reg)
+{
+ struct list_head *i;
+
+ spin_lock_bh(&nf_hook_lock);
+ list_for_each(i, &nf_hooks[reg->pf][reg->hooknum]) {
+ if (reg->priority < ((struct nf_hook_ops *)i)->priority)
+ break;
+ }
+ list_add_rcu(&reg->list, i->prev);
+ spin_unlock_bh(&nf_hook_lock);
+
+ synchronize_net();
+ return 0;
+}
+EXPORT_SYMBOL(nf_register_hook);
+
+void nf_unregister_hook(struct nf_hook_ops *reg)
+{
+ spin_lock_bh(&nf_hook_lock);
+ list_del_rcu(&reg->list);
+ spin_unlock_bh(&nf_hook_lock);
+
+ synchronize_net();
+}
+EXPORT_SYMBOL(nf_unregister_hook);
+
+unsigned int nf_iterate(struct list_head *head,
+ struct sk_buff **skb,
+ int hook,
+ const struct net_device *indev,
+ const struct net_device *outdev,
+ struct list_head **i,
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh)
+{
+ unsigned int verdict;
+
+ /*
+ * The caller must not block between calls to this
+ * function because of risk of continuing from deleted element.
+ */
+ list_for_each_continue_rcu(*i, head) {
+ struct nf_hook_ops *elem = (struct nf_hook_ops *)*i;
+
+ if (hook_thresh > elem->priority)
+ continue;
+
+ /* Optimization: we don't need to hold module
+ reference here, since function can't sleep. --RR */
+ verdict = elem->hook(hook, skb, indev, outdev, okfn);
+ if (verdict != NF_ACCEPT) {
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (unlikely((verdict & NF_VERDICT_MASK)
+ > NF_MAX_VERDICT)) {
+ NFDEBUG("Evil return from %p(%u).\n",
+ elem->hook, hook);
+ continue;
+ }
+#endif
+ if (verdict != NF_REPEAT)
+ return verdict;
+ *i = (*i)->prev;
+ }
+ }
+ return NF_ACCEPT;
+}
+
+
+/* Returns 1 if okfn() needs to be executed by the caller,
+ * -EPERM for NF_DROP, 0 otherwise. */
+int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb,
+ struct net_device *indev,
+ struct net_device *outdev,
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh)
+{
+ struct list_head *elem;
+ unsigned int verdict;
+ int ret = 0;
+
+ /* We may already have this, but read-locks nest anyway */
+ rcu_read_lock();
+
+ elem = &nf_hooks[pf][hook];
+next_hook:
+ verdict = nf_iterate(&nf_hooks[pf][hook], pskb, hook, indev,
+ outdev, &elem, okfn, hook_thresh);
+ if (verdict == NF_ACCEPT || verdict == NF_STOP) {
+ ret = 1;
+ goto unlock;
+ } else if (verdict == NF_DROP) {
+ kfree_skb(*pskb);
+ ret = -EPERM;
+ } else if ((verdict & NF_VERDICT_MASK) == NF_QUEUE) {
+ NFDEBUG("nf_hook: Verdict = QUEUE.\n");
+ if (!nf_queue(pskb, elem, pf, hook, indev, outdev, okfn,
+ verdict >> NF_VERDICT_BITS))
+ goto next_hook;
+ }
+unlock:
+ rcu_read_unlock();
+ return ret;
+}
+EXPORT_SYMBOL(nf_hook_slow);
+
+
+int skb_make_writable(struct sk_buff **pskb, unsigned int writable_len)
+{
+ struct sk_buff *nskb;
+
+ if (writable_len > (*pskb)->len)
+ return 0;
+
+ /* Not exclusive use of packet? Must copy. */
+ if (skb_shared(*pskb) || skb_cloned(*pskb))
+ goto copy_skb;
+
+ return pskb_may_pull(*pskb, writable_len);
+
+copy_skb:
+ nskb = skb_copy(*pskb, GFP_ATOMIC);
+ if (!nskb)
+ return 0;
+ BUG_ON(skb_is_nonlinear(nskb));
+
+ /* Rest of kernel will get very unhappy if we pass it a
+ suddenly-orphaned skbuff */
+ if ((*pskb)->sk)
+ skb_set_owner_w(nskb, (*pskb)->sk);
+ kfree_skb(*pskb);
+ *pskb = nskb;
+ return 1;
+}
+EXPORT_SYMBOL(skb_make_writable);
+
+
+/* This does not belong here, but locally generated errors need it if connection
+ tracking in use: without this, connection may not be in hash table, and hence
+ manufactured ICMP or RST packets will not be associated with it. */
+void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
+EXPORT_SYMBOL(ip_ct_attach);
+
+void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb)
+{
+ void (*attach)(struct sk_buff *, struct sk_buff *);
+
+ if (skb->nfct && (attach = ip_ct_attach) != NULL) {
+ mb(); /* Just to be sure: must be read before executing this */
+ attach(new, skb);
+ }
+}
+EXPORT_SYMBOL(nf_ct_attach);
+
+#ifdef CONFIG_PROC_FS
+struct proc_dir_entry *proc_net_netfilter;
+EXPORT_SYMBOL(proc_net_netfilter);
+#endif
+
+void __init netfilter_init(void)
+{
+ int i, h;
+ for (i = 0; i < NPROTO; i++) {
+ for (h = 0; h < NF_MAX_HOOKS; h++)
+ INIT_LIST_HEAD(&nf_hooks[i][h]);
+ }
+
+#ifdef CONFIG_PROC_FS
+ proc_net_netfilter = proc_mkdir("netfilter", proc_net);
+ if (!proc_net_netfilter)
+ panic("cannot create netfilter proc entry");
+#endif
+
+ if (netfilter_queue_init() < 0)
+ panic("cannot initialize nf_queue");
+ if (netfilter_log_init() < 0)
+ panic("cannot initialize nf_log");
+}
diff --git a/net/netfilter/nf_internals.h b/net/netfilter/nf_internals.h
new file mode 100644
index 000000000000..6bdee2910617
--- /dev/null
+++ b/net/netfilter/nf_internals.h
@@ -0,0 +1,39 @@
+#ifndef _NF_INTERNALS_H
+#define _NF_INTERNALS_H
+
+#include <linux/config.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+
+#ifdef CONFIG_NETFILTER_DEBUG
+#define NFDEBUG(format, args...) printk(format , ## args)
+#else
+#define NFDEBUG(format, args...)
+#endif
+
+
+/* core.c */
+extern unsigned int nf_iterate(struct list_head *head,
+ struct sk_buff **skb,
+ int hook,
+ const struct net_device *indev,
+ const struct net_device *outdev,
+ struct list_head **i,
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh);
+
+/* nf_queue.c */
+extern int nf_queue(struct sk_buff **skb,
+ struct list_head *elem,
+ int pf, unsigned int hook,
+ struct net_device *indev,
+ struct net_device *outdev,
+ int (*okfn)(struct sk_buff *),
+ unsigned int queuenum);
+extern int __init netfilter_queue_init(void);
+
+/* nf_log.c */
+extern int __init netfilter_log_init(void);
+
+#endif
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
new file mode 100644
index 000000000000..3e76bd0824a2
--- /dev/null
+++ b/net/netfilter/nf_log.c
@@ -0,0 +1,178 @@
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter.h>
+#include <linux/seq_file.h>
+#include <net/protocol.h>
+
+#include "nf_internals.h"
+
+/* Internal logging interface, which relies on the real
+ LOG target modules */
+
+#define NF_LOG_PREFIXLEN 128
+
+static struct nf_logger *nf_logging[NPROTO]; /* = NULL */
+static DEFINE_SPINLOCK(nf_log_lock);
+
+/* return EBUSY if somebody else is registered, EEXIST if the same logger
+ * is registred, 0 on success. */
+int nf_log_register(int pf, struct nf_logger *logger)
+{
+ int ret = -EBUSY;
+
+ if (pf >= NPROTO)
+ return -EINVAL;
+
+ /* Any setup of logging members must be done before
+ * substituting pointer. */
+ spin_lock(&nf_log_lock);
+ if (!nf_logging[pf]) {
+ rcu_assign_pointer(nf_logging[pf], logger);
+ ret = 0;
+ } else if (nf_logging[pf] == logger)
+ ret = -EEXIST;
+
+ spin_unlock(&nf_log_lock);
+ return ret;
+}
+EXPORT_SYMBOL(nf_log_register);
+
+int nf_log_unregister_pf(int pf)
+{
+ if (pf >= NPROTO)
+ return -EINVAL;
+
+ spin_lock(&nf_log_lock);
+ nf_logging[pf] = NULL;
+ spin_unlock(&nf_log_lock);
+
+ /* Give time to concurrent readers. */
+ synchronize_net();
+
+ return 0;
+}
+EXPORT_SYMBOL(nf_log_unregister_pf);
+
+void nf_log_unregister_logger(struct nf_logger *logger)
+{
+ int i;
+
+ spin_lock(&nf_log_lock);
+ for (i = 0; i < NPROTO; i++) {
+ if (nf_logging[i] == logger)
+ nf_logging[i] = NULL;
+ }
+ spin_unlock(&nf_log_lock);
+
+ synchronize_net();
+}
+EXPORT_SYMBOL(nf_log_unregister_logger);
+
+void nf_log_packet(int pf,
+ unsigned int hooknum,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ struct nf_loginfo *loginfo,
+ const char *fmt, ...)
+{
+ va_list args;
+ char prefix[NF_LOG_PREFIXLEN];
+ struct nf_logger *logger;
+
+ rcu_read_lock();
+ logger = rcu_dereference(nf_logging[pf]);
+ if (logger) {
+ va_start(args, fmt);
+ vsnprintf(prefix, sizeof(prefix), fmt, args);
+ va_end(args);
+ /* We must read logging before nf_logfn[pf] */
+ logger->logfn(pf, hooknum, skb, in, out, loginfo, prefix);
+ } else if (net_ratelimit()) {
+ printk(KERN_WARNING "nf_log_packet: can\'t log since "
+ "no backend logging module loaded in! Please either "
+ "load one, or disable logging explicitly\n");
+ }
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL(nf_log_packet);
+
+#ifdef CONFIG_PROC_FS
+static void *seq_start(struct seq_file *seq, loff_t *pos)
+{
+ rcu_read_lock();
+
+ if (*pos >= NPROTO)
+ return NULL;
+
+ return pos;
+}
+
+static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ (*pos)++;
+
+ if (*pos >= NPROTO)
+ return NULL;
+
+ return pos;
+}
+
+static void seq_stop(struct seq_file *s, void *v)
+{
+ rcu_read_unlock();
+}
+
+static int seq_show(struct seq_file *s, void *v)
+{
+ loff_t *pos = v;
+ const struct nf_logger *logger;
+
+ logger = rcu_dereference(nf_logging[*pos]);
+
+ if (!logger)
+ return seq_printf(s, "%2lld NONE\n", *pos);
+
+ return seq_printf(s, "%2lld %s\n", *pos, logger->name);
+}
+
+static struct seq_operations nflog_seq_ops = {
+ .start = seq_start,
+ .next = seq_next,
+ .stop = seq_stop,
+ .show = seq_show,
+};
+
+static int nflog_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &nflog_seq_ops);
+}
+
+static struct file_operations nflog_file_ops = {
+ .owner = THIS_MODULE,
+ .open = nflog_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif /* PROC_FS */
+
+
+int __init netfilter_log_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *pde;
+
+ pde = create_proc_entry("nf_log", S_IRUGO, proc_net_netfilter);
+ if (!pde)
+ return -1;
+
+ pde->proc_fops = &nflog_file_ops;
+#endif
+ return 0;
+}
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
new file mode 100644
index 000000000000..d10d552d9c40
--- /dev/null
+++ b/net/netfilter/nf_queue.c
@@ -0,0 +1,343 @@
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter.h>
+#include <linux/seq_file.h>
+#include <net/protocol.h>
+
+#include "nf_internals.h"
+
+/*
+ * A queue handler may be registered for each protocol. Each is protected by
+ * long term mutex. The handler must provide an an outfn() to accept packets
+ * for queueing and must reinject all packets it receives, no matter what.
+ */
+static struct nf_queue_handler *queue_handler[NPROTO];
+static struct nf_queue_rerouter *queue_rerouter;
+
+static DEFINE_RWLOCK(queue_handler_lock);
+
+/* return EBUSY when somebody else is registered, return EEXIST if the
+ * same handler is registered, return 0 in case of success. */
+int nf_register_queue_handler(int pf, struct nf_queue_handler *qh)
+{
+ int ret;
+
+ if (pf >= NPROTO)
+ return -EINVAL;
+
+ write_lock_bh(&queue_handler_lock);
+ if (queue_handler[pf] == qh)
+ ret = -EEXIST;
+ else if (queue_handler[pf])
+ ret = -EBUSY;
+ else {
+ queue_handler[pf] = qh;
+ ret = 0;
+ }
+ write_unlock_bh(&queue_handler_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(nf_register_queue_handler);
+
+/* The caller must flush their queue before this */
+int nf_unregister_queue_handler(int pf)
+{
+ if (pf >= NPROTO)
+ return -EINVAL;
+
+ write_lock_bh(&queue_handler_lock);
+ queue_handler[pf] = NULL;
+ write_unlock_bh(&queue_handler_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(nf_unregister_queue_handler);
+
+int nf_register_queue_rerouter(int pf, struct nf_queue_rerouter *rer)
+{
+ if (pf >= NPROTO)
+ return -EINVAL;
+
+ write_lock_bh(&queue_handler_lock);
+ memcpy(&queue_rerouter[pf], rer, sizeof(queue_rerouter[pf]));
+ write_unlock_bh(&queue_handler_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nf_register_queue_rerouter);
+
+int nf_unregister_queue_rerouter(int pf)
+{
+ if (pf >= NPROTO)
+ return -EINVAL;
+
+ write_lock_bh(&queue_handler_lock);
+ memset(&queue_rerouter[pf], 0, sizeof(queue_rerouter[pf]));
+ write_unlock_bh(&queue_handler_lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(nf_unregister_queue_rerouter);
+
+void nf_unregister_queue_handlers(struct nf_queue_handler *qh)
+{
+ int pf;
+
+ write_lock_bh(&queue_handler_lock);
+ for (pf = 0; pf < NPROTO; pf++) {
+ if (queue_handler[pf] == qh)
+ queue_handler[pf] = NULL;
+ }
+ write_unlock_bh(&queue_handler_lock);
+}
+EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers);
+
+/*
+ * Any packet that leaves via this function must come back
+ * through nf_reinject().
+ */
+int nf_queue(struct sk_buff **skb,
+ struct list_head *elem,
+ int pf, unsigned int hook,
+ struct net_device *indev,
+ struct net_device *outdev,
+ int (*okfn)(struct sk_buff *),
+ unsigned int queuenum)
+{
+ int status;
+ struct nf_info *info;
+#ifdef CONFIG_BRIDGE_NETFILTER
+ struct net_device *physindev = NULL;
+ struct net_device *physoutdev = NULL;
+#endif
+
+ /* QUEUE == DROP if noone is waiting, to be safe. */
+ read_lock(&queue_handler_lock);
+ if (!queue_handler[pf]->outfn) {
+ read_unlock(&queue_handler_lock);
+ kfree_skb(*skb);
+ return 1;
+ }
+
+ info = kmalloc(sizeof(*info)+queue_rerouter[pf].rer_size, GFP_ATOMIC);
+ if (!info) {
+ if (net_ratelimit())
+ printk(KERN_ERR "OOM queueing packet %p\n",
+ *skb);
+ read_unlock(&queue_handler_lock);
+ kfree_skb(*skb);
+ return 1;
+ }
+
+ *info = (struct nf_info) {
+ (struct nf_hook_ops *)elem, pf, hook, indev, outdev, okfn };
+
+ /* If it's going away, ignore hook. */
+ if (!try_module_get(info->elem->owner)) {
+ read_unlock(&queue_handler_lock);
+ kfree(info);
+ return 0;
+ }
+
+ /* Bump dev refs so they don't vanish while packet is out */
+ if (indev) dev_hold(indev);
+ if (outdev) dev_hold(outdev);
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if ((*skb)->nf_bridge) {
+ physindev = (*skb)->nf_bridge->physindev;
+ if (physindev) dev_hold(physindev);
+ physoutdev = (*skb)->nf_bridge->physoutdev;
+ if (physoutdev) dev_hold(physoutdev);
+ }
+#endif
+ if (queue_rerouter[pf].save)
+ queue_rerouter[pf].save(*skb, info);
+
+ status = queue_handler[pf]->outfn(*skb, info, queuenum,
+ queue_handler[pf]->data);
+
+ if (status >= 0 && queue_rerouter[pf].reroute)
+ status = queue_rerouter[pf].reroute(skb, info);
+
+ read_unlock(&queue_handler_lock);
+
+ if (status < 0) {
+ /* James M doesn't say fuck enough. */
+ if (indev) dev_put(indev);
+ if (outdev) dev_put(outdev);
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (physindev) dev_put(physindev);
+ if (physoutdev) dev_put(physoutdev);
+#endif
+ module_put(info->elem->owner);
+ kfree(info);
+ kfree_skb(*skb);
+
+ return 1;
+ }
+
+ return 1;
+}
+
+void nf_reinject(struct sk_buff *skb, struct nf_info *info,
+ unsigned int verdict)
+{
+ struct list_head *elem = &info->elem->list;
+ struct list_head *i;
+
+ rcu_read_lock();
+
+ /* Release those devices we held, or Alexey will kill me. */
+ if (info->indev) dev_put(info->indev);
+ if (info->outdev) dev_put(info->outdev);
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (skb->nf_bridge) {
+ if (skb->nf_bridge->physindev)
+ dev_put(skb->nf_bridge->physindev);
+ if (skb->nf_bridge->physoutdev)
+ dev_put(skb->nf_bridge->physoutdev);
+ }
+#endif
+
+ /* Drop reference to owner of hook which queued us. */
+ module_put(info->elem->owner);
+
+ list_for_each_rcu(i, &nf_hooks[info->pf][info->hook]) {
+ if (i == elem)
+ break;
+ }
+
+ if (elem == &nf_hooks[info->pf][info->hook]) {
+ /* The module which sent it to userspace is gone. */
+ NFDEBUG("%s: module disappeared, dropping packet.\n",
+ __FUNCTION__);
+ verdict = NF_DROP;
+ }
+
+ /* Continue traversal iff userspace said ok... */
+ if (verdict == NF_REPEAT) {
+ elem = elem->prev;
+ verdict = NF_ACCEPT;
+ }
+
+ if (verdict == NF_ACCEPT) {
+ next_hook:
+ verdict = nf_iterate(&nf_hooks[info->pf][info->hook],
+ &skb, info->hook,
+ info->indev, info->outdev, &elem,
+ info->okfn, INT_MIN);
+ }
+
+ switch (verdict & NF_VERDICT_MASK) {
+ case NF_ACCEPT:
+ info->okfn(skb);
+ break;
+
+ case NF_QUEUE:
+ if (!nf_queue(&skb, elem, info->pf, info->hook,
+ info->indev, info->outdev, info->okfn,
+ verdict >> NF_VERDICT_BITS))
+ goto next_hook;
+ break;
+ }
+ rcu_read_unlock();
+
+ if (verdict == NF_DROP)
+ kfree_skb(skb);
+
+ kfree(info);
+ return;
+}
+EXPORT_SYMBOL(nf_reinject);
+
+#ifdef CONFIG_PROC_FS
+static void *seq_start(struct seq_file *seq, loff_t *pos)
+{
+ if (*pos >= NPROTO)
+ return NULL;
+
+ return pos;
+}
+
+static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ (*pos)++;
+
+ if (*pos >= NPROTO)
+ return NULL;
+
+ return pos;
+}
+
+static void seq_stop(struct seq_file *s, void *v)
+{
+
+}
+
+static int seq_show(struct seq_file *s, void *v)
+{
+ int ret;
+ loff_t *pos = v;
+ struct nf_queue_handler *qh;
+
+ read_lock_bh(&queue_handler_lock);
+ qh = queue_handler[*pos];
+ if (!qh)
+ ret = seq_printf(s, "%2lld NONE\n", *pos);
+ else
+ ret = seq_printf(s, "%2lld %s\n", *pos, qh->name);
+ read_unlock_bh(&queue_handler_lock);
+
+ return ret;
+}
+
+static struct seq_operations nfqueue_seq_ops = {
+ .start = seq_start,
+ .next = seq_next,
+ .stop = seq_stop,
+ .show = seq_show,
+};
+
+static int nfqueue_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &nfqueue_seq_ops);
+}
+
+static struct file_operations nfqueue_file_ops = {
+ .owner = THIS_MODULE,
+ .open = nfqueue_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+#endif /* PROC_FS */
+
+
+int __init netfilter_queue_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *pde;
+#endif
+ queue_rerouter = kmalloc(NPROTO * sizeof(struct nf_queue_rerouter),
+ GFP_KERNEL);
+ if (!queue_rerouter)
+ return -ENOMEM;
+
+#ifdef CONFIG_PROC_FS
+ pde = create_proc_entry("nf_queue", S_IRUGO, proc_net_netfilter);
+ if (!pde) {
+ kfree(queue_rerouter);
+ return -1;
+ }
+ pde->proc_fops = &nfqueue_file_ops;
+#endif
+ memset(queue_rerouter, 0, NPROTO * sizeof(struct nf_queue_rerouter));
+
+ return 0;
+}
+
diff --git a/net/netfilter/nf_sockopt.c b/net/netfilter/nf_sockopt.c
new file mode 100644
index 000000000000..61a833a9caa6
--- /dev/null
+++ b/net/netfilter/nf_sockopt.c
@@ -0,0 +1,132 @@
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter.h>
+#include <net/sock.h>
+
+#include "nf_internals.h"
+
+/* Sockopts only registered and called from user context, so
+ net locking would be overkill. Also, [gs]etsockopt calls may
+ sleep. */
+static DECLARE_MUTEX(nf_sockopt_mutex);
+static LIST_HEAD(nf_sockopts);
+
+/* Do exclusive ranges overlap? */
+static inline int overlap(int min1, int max1, int min2, int max2)
+{
+ return max1 > min2 && min1 < max2;
+}
+
+/* Functions to register sockopt ranges (exclusive). */
+int nf_register_sockopt(struct nf_sockopt_ops *reg)
+{
+ struct list_head *i;
+ int ret = 0;
+
+ if (down_interruptible(&nf_sockopt_mutex) != 0)
+ return -EINTR;
+
+ list_for_each(i, &nf_sockopts) {
+ struct nf_sockopt_ops *ops = (struct nf_sockopt_ops *)i;
+ if (ops->pf == reg->pf
+ && (overlap(ops->set_optmin, ops->set_optmax,
+ reg->set_optmin, reg->set_optmax)
+ || overlap(ops->get_optmin, ops->get_optmax,
+ reg->get_optmin, reg->get_optmax))) {
+ NFDEBUG("nf_sock overlap: %u-%u/%u-%u v %u-%u/%u-%u\n",
+ ops->set_optmin, ops->set_optmax,
+ ops->get_optmin, ops->get_optmax,
+ reg->set_optmin, reg->set_optmax,
+ reg->get_optmin, reg->get_optmax);
+ ret = -EBUSY;
+ goto out;
+ }
+ }
+
+ list_add(&reg->list, &nf_sockopts);
+out:
+ up(&nf_sockopt_mutex);
+ return ret;
+}
+EXPORT_SYMBOL(nf_register_sockopt);
+
+void nf_unregister_sockopt(struct nf_sockopt_ops *reg)
+{
+ /* No point being interruptible: we're probably in cleanup_module() */
+ restart:
+ down(&nf_sockopt_mutex);
+ if (reg->use != 0) {
+ /* To be woken by nf_sockopt call... */
+ /* FIXME: Stuart Young's name appears gratuitously. */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ reg->cleanup_task = current;
+ up(&nf_sockopt_mutex);
+ schedule();
+ goto restart;
+ }
+ list_del(&reg->list);
+ up(&nf_sockopt_mutex);
+}
+EXPORT_SYMBOL(nf_unregister_sockopt);
+
+/* Call get/setsockopt() */
+static int nf_sockopt(struct sock *sk, int pf, int val,
+ char __user *opt, int *len, int get)
+{
+ struct list_head *i;
+ struct nf_sockopt_ops *ops;
+ int ret;
+
+ if (down_interruptible(&nf_sockopt_mutex) != 0)
+ return -EINTR;
+
+ list_for_each(i, &nf_sockopts) {
+ ops = (struct nf_sockopt_ops *)i;
+ if (ops->pf == pf) {
+ if (get) {
+ if (val >= ops->get_optmin
+ && val < ops->get_optmax) {
+ ops->use++;
+ up(&nf_sockopt_mutex);
+ ret = ops->get(sk, val, opt, len);
+ goto out;
+ }
+ } else {
+ if (val >= ops->set_optmin
+ && val < ops->set_optmax) {
+ ops->use++;
+ up(&nf_sockopt_mutex);
+ ret = ops->set(sk, val, opt, *len);
+ goto out;
+ }
+ }
+ }
+ }
+ up(&nf_sockopt_mutex);
+ return -ENOPROTOOPT;
+
+ out:
+ down(&nf_sockopt_mutex);
+ ops->use--;
+ if (ops->cleanup_task)
+ wake_up_process(ops->cleanup_task);
+ up(&nf_sockopt_mutex);
+ return ret;
+}
+
+int nf_setsockopt(struct sock *sk, int pf, int val, char __user *opt,
+ int len)
+{
+ return nf_sockopt(sk, pf, val, opt, &len, 0);
+}
+EXPORT_SYMBOL(nf_setsockopt);
+
+int nf_getsockopt(struct sock *sk, int pf, int val, char __user *opt, int *len)
+{
+ return nf_sockopt(sk, pf, val, opt, len, 1);
+}
+EXPORT_SYMBOL(nf_getsockopt);
+
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
new file mode 100644
index 000000000000..e089f17bb803
--- /dev/null
+++ b/net/netfilter/nfnetlink.c
@@ -0,0 +1,376 @@
+/* Netfilter messages via netlink socket. Allows for user space
+ * protocol helpers and general trouble making from userspace.
+ *
+ * (C) 2001 by Jay Schulist <jschlst@samba.org>,
+ * (C) 2002-2005 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2005 by Pablo Neira Ayuso <pablo@eurodev.net>
+ *
+ * Initial netfilter messages via netlink development funded and
+ * generally made possible by Network Robots, Inc. (www.networkrobots.com)
+ *
+ * Further development of this code funded by Astaro AG (http://www.astaro.com)
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/fcntl.h>
+#include <linux/skbuff.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <net/sock.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <linux/netfilter.h>
+#include <linux/netlink.h>
+#include <linux/netfilter/nfnetlink.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_NETFILTER);
+
+static char __initdata nfversion[] = "0.30";
+
+#if 0
+#define DEBUGP(format, args...) \
+ printk(KERN_DEBUG "%s(%d):%s(): " format, __FILE__, \
+ __LINE__, __FUNCTION__, ## args)
+#else
+#define DEBUGP(format, args...)
+#endif
+
+static struct sock *nfnl = NULL;
+static struct nfnetlink_subsystem *subsys_table[NFNL_SUBSYS_COUNT];
+DECLARE_MUTEX(nfnl_sem);
+
+void nfnl_lock(void)
+{
+ nfnl_shlock();
+}
+
+void nfnl_unlock(void)
+{
+ nfnl_shunlock();
+}
+
+int nfnetlink_subsys_register(struct nfnetlink_subsystem *n)
+{
+ DEBUGP("registering subsystem ID %u\n", n->subsys_id);
+
+ nfnl_lock();
+ if (subsys_table[n->subsys_id]) {
+ nfnl_unlock();
+ return -EBUSY;
+ }
+ subsys_table[n->subsys_id] = n;
+ nfnl_unlock();
+
+ return 0;
+}
+
+int nfnetlink_subsys_unregister(struct nfnetlink_subsystem *n)
+{
+ DEBUGP("unregistering subsystem ID %u\n", n->subsys_id);
+
+ nfnl_lock();
+ subsys_table[n->subsys_id] = NULL;
+ nfnl_unlock();
+
+ return 0;
+}
+
+static inline struct nfnetlink_subsystem *nfnetlink_get_subsys(u_int16_t type)
+{
+ u_int8_t subsys_id = NFNL_SUBSYS_ID(type);
+
+ if (subsys_id >= NFNL_SUBSYS_COUNT
+ || subsys_table[subsys_id] == NULL)
+ return NULL;
+
+ return subsys_table[subsys_id];
+}
+
+static inline struct nfnl_callback *
+nfnetlink_find_client(u_int16_t type, struct nfnetlink_subsystem *ss)
+{
+ u_int8_t cb_id = NFNL_MSG_TYPE(type);
+
+ if (cb_id >= ss->cb_count) {
+ DEBUGP("msgtype %u >= %u, returning\n", type, ss->cb_count);
+ return NULL;
+ }
+
+ return &ss->cb[cb_id];
+}
+
+void __nfa_fill(struct sk_buff *skb, int attrtype, int attrlen,
+ const void *data)
+{
+ struct nfattr *nfa;
+ int size = NFA_LENGTH(attrlen);
+
+ nfa = (struct nfattr *)skb_put(skb, NFA_ALIGN(size));
+ nfa->nfa_type = attrtype;
+ nfa->nfa_len = size;
+ memcpy(NFA_DATA(nfa), data, attrlen);
+ memset(NFA_DATA(nfa) + attrlen, 0, NFA_ALIGN(size) - size);
+}
+
+int nfattr_parse(struct nfattr *tb[], int maxattr, struct nfattr *nfa, int len)
+{
+ memset(tb, 0, sizeof(struct nfattr *) * maxattr);
+
+ while (NFA_OK(nfa, len)) {
+ unsigned flavor = nfa->nfa_type;
+ if (flavor && flavor <= maxattr)
+ tb[flavor-1] = nfa;
+ nfa = NFA_NEXT(nfa, len);
+ }
+
+ return 0;
+}
+
+/**
+ * nfnetlink_check_attributes - check and parse nfnetlink attributes
+ *
+ * subsys: nfnl subsystem for which this message is to be parsed
+ * nlmsghdr: netlink message to be checked/parsed
+ * cda: array of pointers, needs to be at least subsys->attr_count big
+ *
+ */
+static int
+nfnetlink_check_attributes(struct nfnetlink_subsystem *subsys,
+ struct nlmsghdr *nlh, struct nfattr *cda[])
+{
+ int min_len;
+ u_int16_t attr_count;
+ u_int8_t cb_id = NFNL_MSG_TYPE(nlh->nlmsg_type);
+
+ if (unlikely(cb_id >= subsys->cb_count)) {
+ DEBUGP("msgtype %u >= %u, returning\n",
+ cb_id, subsys->cb_count);
+ return -EINVAL;
+ }
+
+ min_len = NLMSG_ALIGN(sizeof(struct nfgenmsg));
+ if (unlikely(nlh->nlmsg_len < min_len))
+ return -EINVAL;
+
+ attr_count = subsys->cb[cb_id].attr_count;
+ memset(cda, 0, sizeof(struct nfattr *) * attr_count);
+
+ /* check attribute lengths. */
+ if (likely(nlh->nlmsg_len > min_len)) {
+ struct nfattr *attr = NFM_NFA(NLMSG_DATA(nlh));
+ int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
+
+ while (NFA_OK(attr, attrlen)) {
+ unsigned flavor = attr->nfa_type;
+ if (flavor) {
+ if (flavor > attr_count)
+ return -EINVAL;
+ cda[flavor - 1] = attr;
+ }
+ attr = NFA_NEXT(attr, attrlen);
+ }
+ }
+
+ /* implicit: if nlmsg_len == min_len, we return 0, and an empty
+ * (zeroed) cda[] array. The message is valid, but empty. */
+
+ return 0;
+}
+
+int nfnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
+{
+ int allocation = in_interrupt() ? GFP_ATOMIC : GFP_KERNEL;
+ int err = 0;
+
+ NETLINK_CB(skb).dst_group = group;
+ if (echo)
+ atomic_inc(&skb->users);
+ netlink_broadcast(nfnl, skb, pid, group, allocation);
+ if (echo)
+ err = netlink_unicast(nfnl, skb, pid, MSG_DONTWAIT);
+
+ return err;
+}
+
+int nfnetlink_unicast(struct sk_buff *skb, u_int32_t pid, int flags)
+{
+ return netlink_unicast(nfnl, skb, pid, flags);
+}
+
+/* Process one complete nfnetlink message. */
+static inline int nfnetlink_rcv_msg(struct sk_buff *skb,
+ struct nlmsghdr *nlh, int *errp)
+{
+ struct nfnl_callback *nc;
+ struct nfnetlink_subsystem *ss;
+ int type, err = 0;
+
+ DEBUGP("entered; subsys=%u, msgtype=%u\n",
+ NFNL_SUBSYS_ID(nlh->nlmsg_type),
+ NFNL_MSG_TYPE(nlh->nlmsg_type));
+
+ /* Only requests are handled by kernel now. */
+ if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) {
+ DEBUGP("received non-request message\n");
+ return 0;
+ }
+
+ /* All the messages must at least contain nfgenmsg */
+ if (nlh->nlmsg_len <
+ NLMSG_LENGTH(NLMSG_ALIGN(sizeof(struct nfgenmsg)))) {
+ DEBUGP("received message was too short\n");
+ return 0;
+ }
+
+ type = nlh->nlmsg_type;
+ ss = nfnetlink_get_subsys(type);
+ if (!ss) {
+#ifdef CONFIG_KMOD
+ /* don't call nfnl_shunlock, since it would reenter
+ * with further packet processing */
+ up(&nfnl_sem);
+ request_module("nfnetlink-subsys-%d", NFNL_SUBSYS_ID(type));
+ nfnl_shlock();
+ ss = nfnetlink_get_subsys(type);
+ if (!ss)
+#endif
+ goto err_inval;
+ }
+
+ nc = nfnetlink_find_client(type, ss);
+ if (!nc) {
+ DEBUGP("unable to find client for type %d\n", type);
+ goto err_inval;
+ }
+
+ if (nc->cap_required &&
+ !cap_raised(NETLINK_CB(skb).eff_cap, nc->cap_required)) {
+ DEBUGP("permission denied for type %d\n", type);
+ *errp = -EPERM;
+ return -1;
+ }
+
+ {
+ u_int16_t attr_count =
+ ss->cb[NFNL_MSG_TYPE(nlh->nlmsg_type)].attr_count;
+ struct nfattr *cda[attr_count];
+
+ memset(cda, 0, sizeof(struct nfattr *) * attr_count);
+
+ err = nfnetlink_check_attributes(ss, nlh, cda);
+ if (err < 0)
+ goto err_inval;
+
+ DEBUGP("calling handler\n");
+ err = nc->call(nfnl, skb, nlh, cda, errp);
+ *errp = err;
+ return err;
+ }
+
+err_inval:
+ DEBUGP("returning -EINVAL\n");
+ *errp = -EINVAL;
+ return -1;
+}
+
+/* Process one packet of messages. */
+static inline int nfnetlink_rcv_skb(struct sk_buff *skb)
+{
+ int err;
+ struct nlmsghdr *nlh;
+
+ while (skb->len >= NLMSG_SPACE(0)) {
+ u32 rlen;
+
+ nlh = (struct nlmsghdr *)skb->data;
+ if (nlh->nlmsg_len < sizeof(struct nlmsghdr)
+ || skb->len < nlh->nlmsg_len)
+ return 0;
+ rlen = NLMSG_ALIGN(nlh->nlmsg_len);
+ if (rlen > skb->len)
+ rlen = skb->len;
+ if (nfnetlink_rcv_msg(skb, nlh, &err)) {
+ if (!err)
+ return -1;
+ netlink_ack(skb, nlh, err);
+ } else
+ if (nlh->nlmsg_flags & NLM_F_ACK)
+ netlink_ack(skb, nlh, 0);
+ skb_pull(skb, rlen);
+ }
+
+ return 0;
+}
+
+static void nfnetlink_rcv(struct sock *sk, int len)
+{
+ do {
+ struct sk_buff *skb;
+
+ if (nfnl_shlock_nowait())
+ return;
+
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ if (nfnetlink_rcv_skb(skb)) {
+ if (skb->len)
+ skb_queue_head(&sk->sk_receive_queue,
+ skb);
+ else
+ kfree_skb(skb);
+ break;
+ }
+ kfree_skb(skb);
+ }
+
+ /* don't call nfnl_shunlock, since it would reenter
+ * with further packet processing */
+ up(&nfnl_sem);
+ } while(nfnl && nfnl->sk_receive_queue.qlen);
+}
+
+void __exit nfnetlink_exit(void)
+{
+ printk("Removing netfilter NETLINK layer.\n");
+ sock_release(nfnl->sk_socket);
+ return;
+}
+
+int __init nfnetlink_init(void)
+{
+ printk("Netfilter messages via NETLINK v%s.\n", nfversion);
+
+ nfnl = netlink_kernel_create(NETLINK_NETFILTER, NFNLGRP_MAX,
+ nfnetlink_rcv, THIS_MODULE);
+ if (!nfnl) {
+ printk(KERN_ERR "cannot initialize nfnetlink!\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+module_init(nfnetlink_init);
+module_exit(nfnetlink_exit);
+
+EXPORT_SYMBOL_GPL(nfnetlink_subsys_register);
+EXPORT_SYMBOL_GPL(nfnetlink_subsys_unregister);
+EXPORT_SYMBOL_GPL(nfnetlink_send);
+EXPORT_SYMBOL_GPL(nfnetlink_unicast);
+EXPORT_SYMBOL_GPL(nfattr_parse);
+EXPORT_SYMBOL_GPL(__nfa_fill);
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
new file mode 100644
index 000000000000..ff5601ceedcb
--- /dev/null
+++ b/net/netfilter/nfnetlink_log.c
@@ -0,0 +1,1055 @@
+/*
+ * This is a module which is used for logging packets to userspace via
+ * nfetlink.
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * Based on the old ipv4-only ipt_ULOG.c:
+ * (C) 2000-2004 by Harald Welte <laforge@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/netdevice.h>
+#include <linux/netfilter.h>
+#include <linux/netlink.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_log.h>
+#include <linux/spinlock.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/security.h>
+#include <linux/list.h>
+#include <linux/jhash.h>
+#include <linux/random.h>
+#include <net/sock.h>
+
+#include <asm/atomic.h>
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+#include "../bridge/br_private.h"
+#endif
+
+#define NFULNL_NLBUFSIZ_DEFAULT 4096
+#define NFULNL_TIMEOUT_DEFAULT 100 /* every second */
+#define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */
+
+#define PRINTR(x, args...) do { if (net_ratelimit()) \
+ printk(x, ## args); } while (0);
+
+#if 0
+#define UDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \
+ __FILE__, __LINE__, __FUNCTION__, \
+ ## args)
+#else
+#define UDEBUG(x, ...)
+#endif
+
+struct nfulnl_instance {
+ struct hlist_node hlist; /* global list of instances */
+ spinlock_t lock;
+ atomic_t use; /* use count */
+
+ unsigned int qlen; /* number of nlmsgs in skb */
+ struct sk_buff *skb; /* pre-allocatd skb */
+ struct nlmsghdr *lastnlh; /* netlink header of last msg in skb */
+ struct timer_list timer;
+ int peer_pid; /* PID of the peer process */
+
+ /* configurable parameters */
+ unsigned int flushtimeout; /* timeout until queue flush */
+ unsigned int nlbufsiz; /* netlink buffer allocation size */
+ unsigned int qthreshold; /* threshold of the queue */
+ u_int32_t copy_range;
+ u_int16_t group_num; /* number of this queue */
+ u_int8_t copy_mode;
+};
+
+static DEFINE_RWLOCK(instances_lock);
+
+#define INSTANCE_BUCKETS 16
+static struct hlist_head instance_table[INSTANCE_BUCKETS];
+static unsigned int hash_init;
+
+static inline u_int8_t instance_hashfn(u_int16_t group_num)
+{
+ return ((group_num & 0xff) % INSTANCE_BUCKETS);
+}
+
+static struct nfulnl_instance *
+__instance_lookup(u_int16_t group_num)
+{
+ struct hlist_head *head;
+ struct hlist_node *pos;
+ struct nfulnl_instance *inst;
+
+ UDEBUG("entering (group_num=%u)\n", group_num);
+
+ head = &instance_table[instance_hashfn(group_num)];
+ hlist_for_each_entry(inst, pos, head, hlist) {
+ if (inst->group_num == group_num)
+ return inst;
+ }
+ return NULL;
+}
+
+static inline void
+instance_get(struct nfulnl_instance *inst)
+{
+ atomic_inc(&inst->use);
+}
+
+static struct nfulnl_instance *
+instance_lookup_get(u_int16_t group_num)
+{
+ struct nfulnl_instance *inst;
+
+ read_lock_bh(&instances_lock);
+ inst = __instance_lookup(group_num);
+ if (inst)
+ instance_get(inst);
+ read_unlock_bh(&instances_lock);
+
+ return inst;
+}
+
+static void
+instance_put(struct nfulnl_instance *inst)
+{
+ if (inst && atomic_dec_and_test(&inst->use)) {
+ UDEBUG("kfree(inst=%p)\n", inst);
+ kfree(inst);
+ }
+}
+
+static void nfulnl_timer(unsigned long data);
+
+static struct nfulnl_instance *
+instance_create(u_int16_t group_num, int pid)
+{
+ struct nfulnl_instance *inst;
+
+ UDEBUG("entering (group_num=%u, pid=%d)\n", group_num,
+ pid);
+
+ write_lock_bh(&instances_lock);
+ if (__instance_lookup(group_num)) {
+ inst = NULL;
+ UDEBUG("aborting, instance already exists\n");
+ goto out_unlock;
+ }
+
+ inst = kmalloc(sizeof(*inst), GFP_ATOMIC);
+ if (!inst)
+ goto out_unlock;
+
+ memset(inst, 0, sizeof(*inst));
+ INIT_HLIST_NODE(&inst->hlist);
+ inst->lock = SPIN_LOCK_UNLOCKED;
+ /* needs to be two, since we _put() after creation */
+ atomic_set(&inst->use, 2);
+
+ init_timer(&inst->timer);
+ inst->timer.function = nfulnl_timer;
+ inst->timer.data = (unsigned long)inst;
+ /* don't start timer yet. (re)start it with every packet */
+
+ inst->peer_pid = pid;
+ inst->group_num = group_num;
+
+ inst->qthreshold = NFULNL_QTHRESH_DEFAULT;
+ inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT;
+ inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT;
+ inst->copy_mode = NFULNL_COPY_PACKET;
+ inst->copy_range = 0xffff;
+
+ if (!try_module_get(THIS_MODULE))
+ goto out_free;
+
+ hlist_add_head(&inst->hlist,
+ &instance_table[instance_hashfn(group_num)]);
+
+ UDEBUG("newly added node: %p, next=%p\n", &inst->hlist,
+ inst->hlist.next);
+
+ write_unlock_bh(&instances_lock);
+
+ return inst;
+
+out_free:
+ instance_put(inst);
+out_unlock:
+ write_unlock_bh(&instances_lock);
+ return NULL;
+}
+
+static int __nfulnl_send(struct nfulnl_instance *inst);
+
+static void
+_instance_destroy2(struct nfulnl_instance *inst, int lock)
+{
+ /* first pull it out of the global list */
+ if (lock)
+ write_lock_bh(&instances_lock);
+
+ UDEBUG("removing instance %p (queuenum=%u) from hash\n",
+ inst, inst->group_num);
+
+ hlist_del(&inst->hlist);
+
+ if (lock)
+ write_unlock_bh(&instances_lock);
+
+ /* then flush all pending packets from skb */
+
+ spin_lock_bh(&inst->lock);
+ if (inst->skb) {
+ if (inst->qlen)
+ __nfulnl_send(inst);
+ if (inst->skb) {
+ kfree_skb(inst->skb);
+ inst->skb = NULL;
+ }
+ }
+ spin_unlock_bh(&inst->lock);
+
+ /* and finally put the refcount */
+ instance_put(inst);
+
+ module_put(THIS_MODULE);
+}
+
+static inline void
+__instance_destroy(struct nfulnl_instance *inst)
+{
+ _instance_destroy2(inst, 0);
+}
+
+static inline void
+instance_destroy(struct nfulnl_instance *inst)
+{
+ _instance_destroy2(inst, 1);
+}
+
+static int
+nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode,
+ unsigned int range)
+{
+ int status = 0;
+
+ spin_lock_bh(&inst->lock);
+
+ switch (mode) {
+ case NFULNL_COPY_NONE:
+ case NFULNL_COPY_META:
+ inst->copy_mode = mode;
+ inst->copy_range = 0;
+ break;
+
+ case NFULNL_COPY_PACKET:
+ inst->copy_mode = mode;
+ /* we're using struct nfattr which has 16bit nfa_len */
+ if (range > 0xffff)
+ inst->copy_range = 0xffff;
+ else
+ inst->copy_range = range;
+ break;
+
+ default:
+ status = -EINVAL;
+ break;
+ }
+
+ spin_unlock_bh(&inst->lock);
+
+ return status;
+}
+
+static int
+nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz)
+{
+ int status;
+
+ spin_lock_bh(&inst->lock);
+ if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT)
+ status = -ERANGE;
+ else if (nlbufsiz > 131072)
+ status = -ERANGE;
+ else {
+ inst->nlbufsiz = nlbufsiz;
+ status = 0;
+ }
+ spin_unlock_bh(&inst->lock);
+
+ return status;
+}
+
+static int
+nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout)
+{
+ spin_lock_bh(&inst->lock);
+ inst->flushtimeout = timeout;
+ spin_unlock_bh(&inst->lock);
+
+ return 0;
+}
+
+static int
+nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh)
+{
+ spin_lock_bh(&inst->lock);
+ inst->qthreshold = qthresh;
+ spin_unlock_bh(&inst->lock);
+
+ return 0;
+}
+
+static struct sk_buff *nfulnl_alloc_skb(unsigned int inst_size,
+ unsigned int pkt_size)
+{
+ struct sk_buff *skb;
+
+ UDEBUG("entered (%u, %u)\n", inst_size, pkt_size);
+
+ /* alloc skb which should be big enough for a whole multipart
+ * message. WARNING: has to be <= 128k due to slab restrictions */
+
+ skb = alloc_skb(inst_size, GFP_ATOMIC);
+ if (!skb) {
+ PRINTR("nfnetlink_log: can't alloc whole buffer (%u bytes)\n",
+ inst_size);
+
+ /* try to allocate only as much as we need for current
+ * packet */
+
+ skb = alloc_skb(pkt_size, GFP_ATOMIC);
+ if (!skb)
+ PRINTR("nfnetlink_log: can't even alloc %u bytes\n",
+ pkt_size);
+ }
+
+ return skb;
+}
+
+static int
+__nfulnl_send(struct nfulnl_instance *inst)
+{
+ int status;
+
+ if (timer_pending(&inst->timer))
+ del_timer(&inst->timer);
+
+ if (inst->qlen > 1)
+ inst->lastnlh->nlmsg_type = NLMSG_DONE;
+
+ status = nfnetlink_unicast(inst->skb, inst->peer_pid, MSG_DONTWAIT);
+ if (status < 0) {
+ UDEBUG("netlink_unicast() failed\n");
+ /* FIXME: statistics */
+ }
+
+ inst->qlen = 0;
+ inst->skb = NULL;
+ inst->lastnlh = NULL;
+
+ return status;
+}
+
+static void nfulnl_timer(unsigned long data)
+{
+ struct nfulnl_instance *inst = (struct nfulnl_instance *)data;
+
+ UDEBUG("timer function called, flushing buffer\n");
+
+ spin_lock_bh(&inst->lock);
+ __nfulnl_send(inst);
+ instance_put(inst);
+ spin_unlock_bh(&inst->lock);
+}
+
+static inline int
+__build_packet_message(struct nfulnl_instance *inst,
+ const struct sk_buff *skb,
+ unsigned int data_len,
+ unsigned int pf,
+ unsigned int hooknum,
+ const struct net_device *indev,
+ const struct net_device *outdev,
+ const struct nf_loginfo *li,
+ const char *prefix)
+{
+ unsigned char *old_tail;
+ struct nfulnl_msg_packet_hdr pmsg;
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+ u_int32_t tmp_uint;
+
+ UDEBUG("entered\n");
+
+ old_tail = inst->skb->tail;
+ nlh = NLMSG_PUT(inst->skb, 0, 0,
+ NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET,
+ sizeof(struct nfgenmsg));
+ nfmsg = NLMSG_DATA(nlh);
+ nfmsg->nfgen_family = pf;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = htons(inst->group_num);
+
+ pmsg.hw_protocol = htons(skb->protocol);
+ pmsg.hook = hooknum;
+
+ NFA_PUT(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg);
+
+ if (prefix) {
+ int slen = strlen(prefix);
+ if (slen > NFULNL_PREFIXLEN)
+ slen = NFULNL_PREFIXLEN;
+ NFA_PUT(inst->skb, NFULA_PREFIX, slen, prefix);
+ }
+
+ if (indev) {
+ tmp_uint = htonl(indev->ifindex);
+#ifndef CONFIG_BRIDGE_NETFILTER
+ NFA_PUT(inst->skb, NFULA_IFINDEX_INDEV, sizeof(tmp_uint),
+ &tmp_uint);
+#else
+ if (pf == PF_BRIDGE) {
+ /* Case 1: outdev is physical input device, we need to
+ * look for bridge group (when called from
+ * netfilter_bridge) */
+ NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ /* this is the bridge group "brX" */
+ tmp_uint = htonl(indev->br_port->br->dev->ifindex);
+ NFA_PUT(inst->skb, NFULA_IFINDEX_INDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ } else {
+ /* Case 2: indev is bridge group, we need to look for
+ * physical device (when called from ipv4) */
+ NFA_PUT(inst->skb, NFULA_IFINDEX_INDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ if (skb->nf_bridge && skb->nf_bridge->physindev) {
+ tmp_uint =
+ htonl(skb->nf_bridge->physindev->ifindex);
+ NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSINDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ }
+ }
+#endif
+ }
+
+ if (outdev) {
+ tmp_uint = htonl(outdev->ifindex);
+#ifndef CONFIG_BRIDGE_NETFILTER
+ NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+#else
+ if (pf == PF_BRIDGE) {
+ /* Case 1: outdev is physical output device, we need to
+ * look for bridge group (when called from
+ * netfilter_bridge) */
+ NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ /* this is the bridge group "brX" */
+ tmp_uint = htonl(outdev->br_port->br->dev->ifindex);
+ NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ } else {
+ /* Case 2: indev is a bridge group, we need to look
+ * for physical device (when called from ipv4) */
+ NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ if (skb->nf_bridge) {
+ tmp_uint =
+ htonl(skb->nf_bridge->physoutdev->ifindex);
+ NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ }
+ }
+#endif
+ }
+
+ if (skb->nfmark) {
+ tmp_uint = htonl(skb->nfmark);
+ NFA_PUT(inst->skb, NFULA_MARK, sizeof(tmp_uint), &tmp_uint);
+ }
+
+ if (indev && skb->dev && skb->dev->hard_header_parse) {
+ struct nfulnl_msg_packet_hw phw;
+
+ phw.hw_addrlen =
+ skb->dev->hard_header_parse((struct sk_buff *)skb,
+ phw.hw_addr);
+ phw.hw_addrlen = htons(phw.hw_addrlen);
+ NFA_PUT(inst->skb, NFULA_HWADDR, sizeof(phw), &phw);
+ }
+
+ if (skb->tstamp.off_sec) {
+ struct nfulnl_msg_packet_timestamp ts;
+
+ ts.sec = cpu_to_be64(skb_tv_base.tv_sec + skb->tstamp.off_sec);
+ ts.usec = cpu_to_be64(skb_tv_base.tv_usec + skb->tstamp.off_usec);
+
+ NFA_PUT(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts);
+ }
+
+ /* UID */
+ if (skb->sk) {
+ read_lock_bh(&skb->sk->sk_callback_lock);
+ if (skb->sk->sk_socket && skb->sk->sk_socket->file) {
+ u_int32_t uid = htonl(skb->sk->sk_socket->file->f_uid);
+ /* need to unlock here since NFA_PUT may goto */
+ read_unlock_bh(&skb->sk->sk_callback_lock);
+ NFA_PUT(inst->skb, NFULA_UID, sizeof(uid), &uid);
+ } else
+ read_unlock_bh(&skb->sk->sk_callback_lock);
+ }
+
+ if (data_len) {
+ struct nfattr *nfa;
+ int size = NFA_LENGTH(data_len);
+
+ if (skb_tailroom(inst->skb) < (int)NFA_SPACE(data_len)) {
+ printk(KERN_WARNING "nfnetlink_log: no tailroom!\n");
+ goto nlmsg_failure;
+ }
+
+ nfa = (struct nfattr *)skb_put(inst->skb, NFA_ALIGN(size));
+ nfa->nfa_type = NFULA_PAYLOAD;
+ nfa->nfa_len = size;
+
+ if (skb_copy_bits(skb, 0, NFA_DATA(nfa), data_len))
+ BUG();
+ }
+
+ nlh->nlmsg_len = inst->skb->tail - old_tail;
+ return 0;
+
+nlmsg_failure:
+ UDEBUG("nlmsg_failure\n");
+nfattr_failure:
+ PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n");
+ return -1;
+}
+
+#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
+
+static struct nf_loginfo default_loginfo = {
+ .type = NF_LOG_TYPE_ULOG,
+ .u = {
+ .ulog = {
+ .copy_len = 0xffff,
+ .group = 0,
+ .qthreshold = 1,
+ },
+ },
+};
+
+/* log handler for internal netfilter logging api */
+static void
+nfulnl_log_packet(unsigned int pf,
+ unsigned int hooknum,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const struct nf_loginfo *li_user,
+ const char *prefix)
+{
+ unsigned int size, data_len;
+ struct nfulnl_instance *inst;
+ const struct nf_loginfo *li;
+ unsigned int qthreshold;
+ unsigned int nlbufsiz;
+
+ if (li_user && li_user->type == NF_LOG_TYPE_ULOG)
+ li = li_user;
+ else
+ li = &default_loginfo;
+
+ inst = instance_lookup_get(li->u.ulog.group);
+ if (!inst)
+ inst = instance_lookup_get(0);
+ if (!inst) {
+ PRINTR("nfnetlink_log: trying to log packet, "
+ "but no instance for group %u\n", li->u.ulog.group);
+ return;
+ }
+
+ /* all macros expand to constant values at compile time */
+ /* FIXME: do we want to make the size calculation conditional based on
+ * what is actually present? way more branches and checks, but more
+ * memory efficient... */
+ size = NLMSG_SPACE(sizeof(struct nfgenmsg))
+ + NFA_SPACE(sizeof(struct nfulnl_msg_packet_hdr))
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+#ifdef CONFIG_BRIDGE_NETFILTER
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+ + NFA_SPACE(sizeof(u_int32_t)) /* ifindex */
+#endif
+ + NFA_SPACE(sizeof(u_int32_t)) /* mark */
+ + NFA_SPACE(sizeof(u_int32_t)) /* uid */
+ + NFA_SPACE(NFULNL_PREFIXLEN) /* prefix */
+ + NFA_SPACE(sizeof(struct nfulnl_msg_packet_hw))
+ + NFA_SPACE(sizeof(struct nfulnl_msg_packet_timestamp));
+
+ UDEBUG("initial size=%u\n", size);
+
+ spin_lock_bh(&inst->lock);
+
+ qthreshold = inst->qthreshold;
+ /* per-rule qthreshold overrides per-instance */
+ if (qthreshold > li->u.ulog.qthreshold)
+ qthreshold = li->u.ulog.qthreshold;
+
+ switch (inst->copy_mode) {
+ case NFULNL_COPY_META:
+ case NFULNL_COPY_NONE:
+ data_len = 0;
+ break;
+
+ case NFULNL_COPY_PACKET:
+ if (inst->copy_range == 0
+ || inst->copy_range > skb->len)
+ data_len = skb->len;
+ else
+ data_len = inst->copy_range;
+
+ size += NFA_SPACE(data_len);
+ UDEBUG("copy_packet, therefore size now %u\n", size);
+ break;
+
+ default:
+ spin_unlock_bh(&inst->lock);
+ instance_put(inst);
+ return;
+ }
+
+ if (size > inst->nlbufsiz)
+ nlbufsiz = size;
+ else
+ nlbufsiz = inst->nlbufsiz;
+
+ if (!inst->skb) {
+ if (!(inst->skb = nfulnl_alloc_skb(nlbufsiz, size))) {
+ UDEBUG("error in nfulnl_alloc_skb(%u, %u)\n",
+ inst->nlbufsiz, size);
+ goto alloc_failure;
+ }
+ } else if (inst->qlen >= qthreshold ||
+ size > skb_tailroom(inst->skb)) {
+ /* either the queue len is too high or we don't have
+ * enough room in the skb left. flush to userspace. */
+ UDEBUG("flushing old skb\n");
+
+ __nfulnl_send(inst);
+
+ if (!(inst->skb = nfulnl_alloc_skb(nlbufsiz, size))) {
+ UDEBUG("error in nfulnl_alloc_skb(%u, %u)\n",
+ inst->nlbufsiz, size);
+ goto alloc_failure;
+ }
+ }
+
+ UDEBUG("qlen %d, qthreshold %d\n", inst->qlen, qthreshold);
+ inst->qlen++;
+
+ __build_packet_message(inst, skb, data_len, pf,
+ hooknum, in, out, li, prefix);
+
+ /* timer_pending always called within inst->lock, so there
+ * is no chance of a race here */
+ if (!timer_pending(&inst->timer)) {
+ instance_get(inst);
+ inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100);
+ add_timer(&inst->timer);
+ }
+ spin_unlock_bh(&inst->lock);
+
+ return;
+
+alloc_failure:
+ spin_unlock_bh(&inst->lock);
+ instance_put(inst);
+ UDEBUG("error allocating skb\n");
+ /* FIXME: statistics */
+}
+
+static int
+nfulnl_rcv_nl_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct netlink_notify *n = ptr;
+
+ if (event == NETLINK_URELEASE &&
+ n->protocol == NETLINK_NETFILTER && n->pid) {
+ int i;
+
+ /* destroy all instances for this pid */
+ write_lock_bh(&instances_lock);
+ for (i = 0; i < INSTANCE_BUCKETS; i++) {
+ struct hlist_node *tmp, *t2;
+ struct nfulnl_instance *inst;
+ struct hlist_head *head = &instance_table[i];
+
+ hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
+ UDEBUG("node = %p\n", inst);
+ if (n->pid == inst->peer_pid)
+ __instance_destroy(inst);
+ }
+ }
+ write_unlock_bh(&instances_lock);
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block nfulnl_rtnl_notifier = {
+ .notifier_call = nfulnl_rcv_nl_event,
+};
+
+static int
+nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+{
+ return -ENOTSUPP;
+}
+
+static struct nf_logger nfulnl_logger = {
+ .name = "nfnetlink_log",
+ .logfn = &nfulnl_log_packet,
+ .me = THIS_MODULE,
+};
+
+static const int nfula_min[NFULA_MAX] = {
+ [NFULA_PACKET_HDR-1] = sizeof(struct nfulnl_msg_packet_hdr),
+ [NFULA_MARK-1] = sizeof(u_int32_t),
+ [NFULA_TIMESTAMP-1] = sizeof(struct nfulnl_msg_packet_timestamp),
+ [NFULA_IFINDEX_INDEV-1] = sizeof(u_int32_t),
+ [NFULA_IFINDEX_OUTDEV-1]= sizeof(u_int32_t),
+ [NFULA_HWADDR-1] = sizeof(struct nfulnl_msg_packet_hw),
+ [NFULA_PAYLOAD-1] = 0,
+ [NFULA_PREFIX-1] = 0,
+ [NFULA_UID-1] = sizeof(u_int32_t),
+};
+
+static const int nfula_cfg_min[NFULA_CFG_MAX] = {
+ [NFULA_CFG_CMD-1] = sizeof(struct nfulnl_msg_config_cmd),
+ [NFULA_CFG_MODE-1] = sizeof(struct nfulnl_msg_config_mode),
+ [NFULA_CFG_TIMEOUT-1] = sizeof(u_int32_t),
+ [NFULA_CFG_QTHRESH-1] = sizeof(u_int32_t),
+ [NFULA_CFG_NLBUFSIZ-1] = sizeof(u_int32_t),
+};
+
+static int
+nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *nfula[], int *errp)
+{
+ struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
+ u_int16_t group_num = ntohs(nfmsg->res_id);
+ struct nfulnl_instance *inst;
+ int ret = 0;
+
+ UDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type));
+
+ if (nfattr_bad_size(nfula, NFULA_CFG_MAX, nfula_cfg_min)) {
+ UDEBUG("bad attribute size\n");
+ return -EINVAL;
+ }
+
+ inst = instance_lookup_get(group_num);
+ if (nfula[NFULA_CFG_CMD-1]) {
+ u_int8_t pf = nfmsg->nfgen_family;
+ struct nfulnl_msg_config_cmd *cmd;
+ cmd = NFA_DATA(nfula[NFULA_CFG_CMD-1]);
+ UDEBUG("found CFG_CMD for\n");
+
+ switch (cmd->command) {
+ case NFULNL_CFG_CMD_BIND:
+ if (inst) {
+ ret = -EBUSY;
+ goto out_put;
+ }
+
+ inst = instance_create(group_num,
+ NETLINK_CB(skb).pid);
+ if (!inst) {
+ ret = -EINVAL;
+ goto out_put;
+ }
+ break;
+ case NFULNL_CFG_CMD_UNBIND:
+ if (!inst) {
+ ret = -ENODEV;
+ goto out_put;
+ }
+
+ if (inst->peer_pid != NETLINK_CB(skb).pid) {
+ ret = -EPERM;
+ goto out_put;
+ }
+
+ instance_destroy(inst);
+ break;
+ case NFULNL_CFG_CMD_PF_BIND:
+ UDEBUG("registering log handler for pf=%u\n", pf);
+ ret = nf_log_register(pf, &nfulnl_logger);
+ break;
+ case NFULNL_CFG_CMD_PF_UNBIND:
+ UDEBUG("unregistering log handler for pf=%u\n", pf);
+ /* This is a bug and a feature. We cannot unregister
+ * other handlers, like nfnetlink_inst can */
+ nf_log_unregister_pf(pf);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ } else {
+ if (!inst) {
+ UDEBUG("no config command, and no instance for "
+ "group=%u pid=%u =>ENOENT\n",
+ group_num, NETLINK_CB(skb).pid);
+ ret = -ENOENT;
+ goto out_put;
+ }
+
+ if (inst->peer_pid != NETLINK_CB(skb).pid) {
+ UDEBUG("no config command, and wrong pid\n");
+ ret = -EPERM;
+ goto out_put;
+ }
+ }
+
+ if (nfula[NFULA_CFG_MODE-1]) {
+ struct nfulnl_msg_config_mode *params;
+ params = NFA_DATA(nfula[NFULA_CFG_MODE-1]);
+
+ nfulnl_set_mode(inst, params->copy_mode,
+ ntohs(params->copy_range));
+ }
+
+ if (nfula[NFULA_CFG_TIMEOUT-1]) {
+ u_int32_t timeout =
+ *(u_int32_t *)NFA_DATA(nfula[NFULA_CFG_TIMEOUT-1]);
+
+ nfulnl_set_timeout(inst, ntohl(timeout));
+ }
+
+ if (nfula[NFULA_CFG_NLBUFSIZ-1]) {
+ u_int32_t nlbufsiz =
+ *(u_int32_t *)NFA_DATA(nfula[NFULA_CFG_NLBUFSIZ-1]);
+
+ nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz));
+ }
+
+ if (nfula[NFULA_CFG_QTHRESH-1]) {
+ u_int32_t qthresh =
+ *(u_int16_t *)NFA_DATA(nfula[NFULA_CFG_QTHRESH-1]);
+
+ nfulnl_set_qthresh(inst, ntohl(qthresh));
+ }
+
+out_put:
+ instance_put(inst);
+ return ret;
+}
+
+static struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = {
+ [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp,
+ .attr_count = NFULA_MAX,
+ .cap_required = CAP_NET_ADMIN, },
+ [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config,
+ .attr_count = NFULA_CFG_MAX,
+ .cap_required = CAP_NET_ADMIN },
+};
+
+static struct nfnetlink_subsystem nfulnl_subsys = {
+ .name = "log",
+ .subsys_id = NFNL_SUBSYS_ULOG,
+ .cb_count = NFULNL_MSG_MAX,
+ .cb = nfulnl_cb,
+};
+
+#ifdef CONFIG_PROC_FS
+struct iter_state {
+ unsigned int bucket;
+};
+
+static struct hlist_node *get_first(struct seq_file *seq)
+{
+ struct iter_state *st = seq->private;
+
+ if (!st)
+ return NULL;
+
+ for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
+ if (!hlist_empty(&instance_table[st->bucket]))
+ return instance_table[st->bucket].first;
+ }
+ return NULL;
+}
+
+static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
+{
+ struct iter_state *st = seq->private;
+
+ h = h->next;
+ while (!h) {
+ if (++st->bucket >= INSTANCE_BUCKETS)
+ return NULL;
+
+ h = instance_table[st->bucket].first;
+ }
+ return h;
+}
+
+static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct hlist_node *head;
+ head = get_first(seq);
+
+ if (head)
+ while (pos && (head = get_next(seq, head)))
+ pos--;
+ return pos ? NULL : head;
+}
+
+static void *seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock_bh(&instances_lock);
+ return get_idx(seq, *pos);
+}
+
+static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return get_next(s, v);
+}
+
+static void seq_stop(struct seq_file *s, void *v)
+{
+ read_unlock_bh(&instances_lock);
+}
+
+static int seq_show(struct seq_file *s, void *v)
+{
+ const struct nfulnl_instance *inst = v;
+
+ return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n",
+ inst->group_num,
+ inst->peer_pid, inst->qlen,
+ inst->copy_mode, inst->copy_range,
+ inst->flushtimeout, atomic_read(&inst->use));
+}
+
+static struct seq_operations nful_seq_ops = {
+ .start = seq_start,
+ .next = seq_next,
+ .stop = seq_stop,
+ .show = seq_show,
+};
+
+static int nful_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct iter_state *is;
+ int ret;
+
+ is = kmalloc(sizeof(*is), GFP_KERNEL);
+ if (!is)
+ return -ENOMEM;
+ memset(is, 0, sizeof(*is));
+ ret = seq_open(file, &nful_seq_ops);
+ if (ret < 0)
+ goto out_free;
+ seq = file->private_data;
+ seq->private = is;
+ return ret;
+out_free:
+ kfree(is);
+ return ret;
+}
+
+static struct file_operations nful_file_ops = {
+ .owner = THIS_MODULE,
+ .open = nful_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+#endif /* PROC_FS */
+
+static int
+init_or_cleanup(int init)
+{
+ int i, status = -ENOMEM;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_nful;
+#endif
+
+ if (!init)
+ goto cleanup;
+
+ for (i = 0; i < INSTANCE_BUCKETS; i++)
+ INIT_HLIST_HEAD(&instance_table[i]);
+
+ /* it's not really all that important to have a random value, so
+ * we can do this from the init function, even if there hasn't
+ * been that much entropy yet */
+ get_random_bytes(&hash_init, sizeof(hash_init));
+
+ netlink_register_notifier(&nfulnl_rtnl_notifier);
+ status = nfnetlink_subsys_register(&nfulnl_subsys);
+ if (status < 0) {
+ printk(KERN_ERR "log: failed to create netlink socket\n");
+ goto cleanup_netlink_notifier;
+ }
+
+#ifdef CONFIG_PROC_FS
+ proc_nful = create_proc_entry("nfnetlink_log", 0440,
+ proc_net_netfilter);
+ if (!proc_nful)
+ goto cleanup_subsys;
+ proc_nful->proc_fops = &nful_file_ops;
+#endif
+
+ return status;
+
+cleanup:
+ nf_log_unregister_logger(&nfulnl_logger);
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("nfnetlink_log", proc_net_netfilter);
+cleanup_subsys:
+#endif
+ nfnetlink_subsys_unregister(&nfulnl_subsys);
+cleanup_netlink_notifier:
+ netlink_unregister_notifier(&nfulnl_rtnl_notifier);
+ return status;
+}
+
+static int __init init(void)
+{
+
+ return init_or_cleanup(1);
+}
+
+static void __exit fini(void)
+{
+ init_or_cleanup(0);
+}
+
+MODULE_DESCRIPTION("netfilter userspace logging");
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG);
+
+module_init(init);
+module_exit(fini);
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
new file mode 100644
index 000000000000..e3a5285329af
--- /dev/null
+++ b/net/netfilter/nfnetlink_queue.c
@@ -0,0 +1,1132 @@
+/*
+ * This is a module which is used for queueing packets and communicating with
+ * userspace via nfetlink.
+ *
+ * (C) 2005 by Harald Welte <laforge@netfilter.org>
+ *
+ * Based on the old ipv4-only ip_queue.c:
+ * (C) 2000-2002 James Morris <jmorris@intercode.com.au>
+ * (C) 2003-2005 Netfilter Core Team <coreteam@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/notifier.h>
+#include <linux/netdevice.h>
+#include <linux/netfilter.h>
+#include <linux/proc_fs.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_queue.h>
+#include <linux/list.h>
+#include <net/sock.h>
+
+#include <asm/atomic.h>
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+#include "../bridge/br_private.h"
+#endif
+
+#define NFQNL_QMAX_DEFAULT 1024
+
+#if 0
+#define QDEBUG(x, args ...) printk(KERN_DEBUG "%s(%d):%s(): " x, \
+ __FILE__, __LINE__, __FUNCTION__, \
+ ## args)
+#else
+#define QDEBUG(x, ...)
+#endif
+
+struct nfqnl_queue_entry {
+ struct list_head list;
+ struct nf_info *info;
+ struct sk_buff *skb;
+ unsigned int id;
+};
+
+struct nfqnl_instance {
+ struct hlist_node hlist; /* global list of queues */
+ atomic_t use;
+
+ int peer_pid;
+ unsigned int queue_maxlen;
+ unsigned int copy_range;
+ unsigned int queue_total;
+ unsigned int queue_dropped;
+ unsigned int queue_user_dropped;
+
+ atomic_t id_sequence; /* 'sequence' of pkt ids */
+
+ u_int16_t queue_num; /* number of this queue */
+ u_int8_t copy_mode;
+
+ spinlock_t lock;
+
+ struct list_head queue_list; /* packets in queue */
+};
+
+typedef int (*nfqnl_cmpfn)(struct nfqnl_queue_entry *, unsigned long);
+
+static DEFINE_RWLOCK(instances_lock);
+
+u_int64_t htonll(u_int64_t in)
+{
+ u_int64_t out;
+ int i;
+
+ for (i = 0; i < sizeof(u_int64_t); i++)
+ ((u_int8_t *)&out)[sizeof(u_int64_t)-1] = ((u_int8_t *)&in)[i];
+
+ return out;
+}
+
+#define INSTANCE_BUCKETS 16
+static struct hlist_head instance_table[INSTANCE_BUCKETS];
+
+static inline u_int8_t instance_hashfn(u_int16_t queue_num)
+{
+ return ((queue_num >> 8) | queue_num) % INSTANCE_BUCKETS;
+}
+
+static struct nfqnl_instance *
+__instance_lookup(u_int16_t queue_num)
+{
+ struct hlist_head *head;
+ struct hlist_node *pos;
+ struct nfqnl_instance *inst;
+
+ head = &instance_table[instance_hashfn(queue_num)];
+ hlist_for_each_entry(inst, pos, head, hlist) {
+ if (inst->queue_num == queue_num)
+ return inst;
+ }
+ return NULL;
+}
+
+static struct nfqnl_instance *
+instance_lookup_get(u_int16_t queue_num)
+{
+ struct nfqnl_instance *inst;
+
+ read_lock_bh(&instances_lock);
+ inst = __instance_lookup(queue_num);
+ if (inst)
+ atomic_inc(&inst->use);
+ read_unlock_bh(&instances_lock);
+
+ return inst;
+}
+
+static void
+instance_put(struct nfqnl_instance *inst)
+{
+ if (inst && atomic_dec_and_test(&inst->use)) {
+ QDEBUG("kfree(inst=%p)\n", inst);
+ kfree(inst);
+ }
+}
+
+static struct nfqnl_instance *
+instance_create(u_int16_t queue_num, int pid)
+{
+ struct nfqnl_instance *inst;
+
+ QDEBUG("entering for queue_num=%u, pid=%d\n", queue_num, pid);
+
+ write_lock_bh(&instances_lock);
+ if (__instance_lookup(queue_num)) {
+ inst = NULL;
+ QDEBUG("aborting, instance already exists\n");
+ goto out_unlock;
+ }
+
+ inst = kmalloc(sizeof(*inst), GFP_ATOMIC);
+ if (!inst)
+ goto out_unlock;
+
+ memset(inst, 0, sizeof(*inst));
+ inst->queue_num = queue_num;
+ inst->peer_pid = pid;
+ inst->queue_maxlen = NFQNL_QMAX_DEFAULT;
+ inst->copy_range = 0xfffff;
+ inst->copy_mode = NFQNL_COPY_NONE;
+ atomic_set(&inst->id_sequence, 0);
+ /* needs to be two, since we _put() after creation */
+ atomic_set(&inst->use, 2);
+ inst->lock = SPIN_LOCK_UNLOCKED;
+ INIT_LIST_HEAD(&inst->queue_list);
+
+ if (!try_module_get(THIS_MODULE))
+ goto out_free;
+
+ hlist_add_head(&inst->hlist,
+ &instance_table[instance_hashfn(queue_num)]);
+
+ write_unlock_bh(&instances_lock);
+
+ QDEBUG("successfully created new instance\n");
+
+ return inst;
+
+out_free:
+ kfree(inst);
+out_unlock:
+ write_unlock_bh(&instances_lock);
+ return NULL;
+}
+
+static void nfqnl_flush(struct nfqnl_instance *queue, int verdict);
+
+static void
+_instance_destroy2(struct nfqnl_instance *inst, int lock)
+{
+ /* first pull it out of the global list */
+ if (lock)
+ write_lock_bh(&instances_lock);
+
+ QDEBUG("removing instance %p (queuenum=%u) from hash\n",
+ inst, inst->queue_num);
+ hlist_del(&inst->hlist);
+
+ if (lock)
+ write_unlock_bh(&instances_lock);
+
+ /* then flush all pending skbs from the queue */
+ nfqnl_flush(inst, NF_DROP);
+
+ /* and finally put the refcount */
+ instance_put(inst);
+
+ module_put(THIS_MODULE);
+}
+
+static inline void
+__instance_destroy(struct nfqnl_instance *inst)
+{
+ _instance_destroy2(inst, 0);
+}
+
+static inline void
+instance_destroy(struct nfqnl_instance *inst)
+{
+ _instance_destroy2(inst, 1);
+}
+
+
+
+static void
+issue_verdict(struct nfqnl_queue_entry *entry, int verdict)
+{
+ QDEBUG("entering for entry %p, verdict %u\n", entry, verdict);
+
+ /* TCP input path (and probably other bits) assume to be called
+ * from softirq context, not from syscall, like issue_verdict is
+ * called. TCP input path deadlocks with locks taken from timer
+ * softirq, e.g. We therefore emulate this by local_bh_disable() */
+
+ local_bh_disable();
+ nf_reinject(entry->skb, entry->info, verdict);
+ local_bh_enable();
+
+ kfree(entry);
+}
+
+static inline void
+__enqueue_entry(struct nfqnl_instance *queue,
+ struct nfqnl_queue_entry *entry)
+{
+ list_add(&entry->list, &queue->queue_list);
+ queue->queue_total++;
+}
+
+/*
+ * Find and return a queued entry matched by cmpfn, or return the last
+ * entry if cmpfn is NULL.
+ */
+static inline struct nfqnl_queue_entry *
+__find_entry(struct nfqnl_instance *queue, nfqnl_cmpfn cmpfn,
+ unsigned long data)
+{
+ struct list_head *p;
+
+ list_for_each_prev(p, &queue->queue_list) {
+ struct nfqnl_queue_entry *entry = (struct nfqnl_queue_entry *)p;
+
+ if (!cmpfn || cmpfn(entry, data))
+ return entry;
+ }
+ return NULL;
+}
+
+static inline void
+__dequeue_entry(struct nfqnl_instance *q, struct nfqnl_queue_entry *entry)
+{
+ list_del(&entry->list);
+ q->queue_total--;
+}
+
+static inline struct nfqnl_queue_entry *
+__find_dequeue_entry(struct nfqnl_instance *queue,
+ nfqnl_cmpfn cmpfn, unsigned long data)
+{
+ struct nfqnl_queue_entry *entry;
+
+ entry = __find_entry(queue, cmpfn, data);
+ if (entry == NULL)
+ return NULL;
+
+ __dequeue_entry(queue, entry);
+ return entry;
+}
+
+
+static inline void
+__nfqnl_flush(struct nfqnl_instance *queue, int verdict)
+{
+ struct nfqnl_queue_entry *entry;
+
+ while ((entry = __find_dequeue_entry(queue, NULL, 0)))
+ issue_verdict(entry, verdict);
+}
+
+static inline int
+__nfqnl_set_mode(struct nfqnl_instance *queue,
+ unsigned char mode, unsigned int range)
+{
+ int status = 0;
+
+ switch (mode) {
+ case NFQNL_COPY_NONE:
+ case NFQNL_COPY_META:
+ queue->copy_mode = mode;
+ queue->copy_range = 0;
+ break;
+
+ case NFQNL_COPY_PACKET:
+ queue->copy_mode = mode;
+ /* we're using struct nfattr which has 16bit nfa_len */
+ if (range > 0xffff)
+ queue->copy_range = 0xffff;
+ else
+ queue->copy_range = range;
+ break;
+
+ default:
+ status = -EINVAL;
+
+ }
+ return status;
+}
+
+static struct nfqnl_queue_entry *
+find_dequeue_entry(struct nfqnl_instance *queue,
+ nfqnl_cmpfn cmpfn, unsigned long data)
+{
+ struct nfqnl_queue_entry *entry;
+
+ spin_lock_bh(&queue->lock);
+ entry = __find_dequeue_entry(queue, cmpfn, data);
+ spin_unlock_bh(&queue->lock);
+
+ return entry;
+}
+
+static void
+nfqnl_flush(struct nfqnl_instance *queue, int verdict)
+{
+ spin_lock_bh(&queue->lock);
+ __nfqnl_flush(queue, verdict);
+ spin_unlock_bh(&queue->lock);
+}
+
+static struct sk_buff *
+nfqnl_build_packet_message(struct nfqnl_instance *queue,
+ struct nfqnl_queue_entry *entry, int *errp)
+{
+ unsigned char *old_tail;
+ size_t size;
+ size_t data_len = 0;
+ struct sk_buff *skb;
+ struct nfqnl_msg_packet_hdr pmsg;
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfmsg;
+ unsigned int tmp_uint;
+
+ QDEBUG("entered\n");
+
+ /* all macros expand to constant values at compile time */
+ size = NLMSG_SPACE(sizeof(struct nfqnl_msg_packet_hdr))
+ + NLMSG_SPACE(sizeof(u_int32_t)) /* ifindex */
+ + NLMSG_SPACE(sizeof(u_int32_t)) /* ifindex */
+#ifdef CONFIG_BRIDGE_NETFILTER
+ + NLMSG_SPACE(sizeof(u_int32_t)) /* ifindex */
+ + NLMSG_SPACE(sizeof(u_int32_t)) /* ifindex */
+#endif
+ + NLMSG_SPACE(sizeof(u_int32_t)) /* mark */
+ + NLMSG_SPACE(sizeof(struct nfqnl_msg_packet_hw))
+ + NLMSG_SPACE(sizeof(struct nfqnl_msg_packet_timestamp));
+
+ spin_lock_bh(&queue->lock);
+
+ switch (queue->copy_mode) {
+ case NFQNL_COPY_META:
+ case NFQNL_COPY_NONE:
+ data_len = 0;
+ break;
+
+ case NFQNL_COPY_PACKET:
+ if (queue->copy_range == 0
+ || queue->copy_range > entry->skb->len)
+ data_len = entry->skb->len;
+ else
+ data_len = queue->copy_range;
+
+ size += NLMSG_SPACE(data_len);
+ break;
+
+ default:
+ *errp = -EINVAL;
+ spin_unlock_bh(&queue->lock);
+ return NULL;
+ }
+
+ spin_unlock_bh(&queue->lock);
+
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb)
+ goto nlmsg_failure;
+
+ old_tail= skb->tail;
+ nlh = NLMSG_PUT(skb, 0, 0,
+ NFNL_SUBSYS_QUEUE << 8 | NFQNL_MSG_PACKET,
+ sizeof(struct nfgenmsg));
+ nfmsg = NLMSG_DATA(nlh);
+ nfmsg->nfgen_family = entry->info->pf;
+ nfmsg->version = NFNETLINK_V0;
+ nfmsg->res_id = htons(queue->queue_num);
+
+ pmsg.packet_id = htonl(entry->id);
+ pmsg.hw_protocol = htons(entry->skb->protocol);
+ pmsg.hook = entry->info->hook;
+
+ NFA_PUT(skb, NFQA_PACKET_HDR, sizeof(pmsg), &pmsg);
+
+ if (entry->info->indev) {
+ tmp_uint = htonl(entry->info->indev->ifindex);
+#ifndef CONFIG_BRIDGE_NETFILTER
+ NFA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint), &tmp_uint);
+#else
+ if (entry->info->pf == PF_BRIDGE) {
+ /* Case 1: indev is physical input device, we need to
+ * look for bridge group (when called from
+ * netfilter_bridge) */
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSINDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ /* this is the bridge group "brX" */
+ tmp_uint = htonl(entry->info->indev->br_port->br->dev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ } else {
+ /* Case 2: indev is bridge group, we need to look for
+ * physical device (when called from ipv4) */
+ NFA_PUT(skb, NFQA_IFINDEX_INDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ if (entry->skb->nf_bridge
+ && entry->skb->nf_bridge->physindev) {
+ tmp_uint = htonl(entry->skb->nf_bridge->physindev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSINDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ }
+ }
+#endif
+ }
+
+ if (entry->info->outdev) {
+ tmp_uint = htonl(entry->info->outdev->ifindex);
+#ifndef CONFIG_BRIDGE_NETFILTER
+ NFA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint), &tmp_uint);
+#else
+ if (entry->info->pf == PF_BRIDGE) {
+ /* Case 1: outdev is physical output device, we need to
+ * look for bridge group (when called from
+ * netfilter_bridge) */
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ /* this is the bridge group "brX" */
+ tmp_uint = htonl(entry->info->outdev->br_port->br->dev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ } else {
+ /* Case 2: outdev is bridge group, we need to look for
+ * physical output device (when called from ipv4) */
+ NFA_PUT(skb, NFQA_IFINDEX_OUTDEV, sizeof(tmp_uint),
+ &tmp_uint);
+ if (entry->skb->nf_bridge
+ && entry->skb->nf_bridge->physoutdev) {
+ tmp_uint = htonl(entry->skb->nf_bridge->physoutdev->ifindex);
+ NFA_PUT(skb, NFQA_IFINDEX_PHYSOUTDEV,
+ sizeof(tmp_uint), &tmp_uint);
+ }
+ }
+#endif
+ }
+
+ if (entry->skb->nfmark) {
+ tmp_uint = htonl(entry->skb->nfmark);
+ NFA_PUT(skb, NFQA_MARK, sizeof(u_int32_t), &tmp_uint);
+ }
+
+ if (entry->info->indev && entry->skb->dev
+ && entry->skb->dev->hard_header_parse) {
+ struct nfqnl_msg_packet_hw phw;
+
+ phw.hw_addrlen =
+ entry->skb->dev->hard_header_parse(entry->skb,
+ phw.hw_addr);
+ phw.hw_addrlen = htons(phw.hw_addrlen);
+ NFA_PUT(skb, NFQA_HWADDR, sizeof(phw), &phw);
+ }
+
+ if (entry->skb->tstamp.off_sec) {
+ struct nfqnl_msg_packet_timestamp ts;
+
+ ts.sec = htonll(skb_tv_base.tv_sec + entry->skb->tstamp.off_sec);
+ ts.usec = htonll(skb_tv_base.tv_usec + entry->skb->tstamp.off_usec);
+
+ NFA_PUT(skb, NFQA_TIMESTAMP, sizeof(ts), &ts);
+ }
+
+ if (data_len) {
+ struct nfattr *nfa;
+ int size = NFA_LENGTH(data_len);
+
+ if (skb_tailroom(skb) < (int)NFA_SPACE(data_len)) {
+ printk(KERN_WARNING "nf_queue: no tailroom!\n");
+ goto nlmsg_failure;
+ }
+
+ nfa = (struct nfattr *)skb_put(skb, NFA_ALIGN(size));
+ nfa->nfa_type = NFQA_PAYLOAD;
+ nfa->nfa_len = size;
+
+ if (skb_copy_bits(entry->skb, 0, NFA_DATA(nfa), data_len))
+ BUG();
+ }
+
+ nlh->nlmsg_len = skb->tail - old_tail;
+ return skb;
+
+nlmsg_failure:
+nfattr_failure:
+ if (skb)
+ kfree_skb(skb);
+ *errp = -EINVAL;
+ if (net_ratelimit())
+ printk(KERN_ERR "nf_queue: error creating packet message\n");
+ return NULL;
+}
+
+static int
+nfqnl_enqueue_packet(struct sk_buff *skb, struct nf_info *info,
+ unsigned int queuenum, void *data)
+{
+ int status = -EINVAL;
+ struct sk_buff *nskb;
+ struct nfqnl_instance *queue;
+ struct nfqnl_queue_entry *entry;
+
+ QDEBUG("entered\n");
+
+ queue = instance_lookup_get(queuenum);
+ if (!queue) {
+ QDEBUG("no queue instance matching\n");
+ return -EINVAL;
+ }
+
+ if (queue->copy_mode == NFQNL_COPY_NONE) {
+ QDEBUG("mode COPY_NONE, aborting\n");
+ status = -EAGAIN;
+ goto err_out_put;
+ }
+
+ entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+ if (entry == NULL) {
+ if (net_ratelimit())
+ printk(KERN_ERR
+ "nf_queue: OOM in nfqnl_enqueue_packet()\n");
+ status = -ENOMEM;
+ goto err_out_put;
+ }
+
+ entry->info = info;
+ entry->skb = skb;
+ entry->id = atomic_inc_return(&queue->id_sequence);
+
+ nskb = nfqnl_build_packet_message(queue, entry, &status);
+ if (nskb == NULL)
+ goto err_out_free;
+
+ spin_lock_bh(&queue->lock);
+
+ if (!queue->peer_pid)
+ goto err_out_free_nskb;
+
+ if (queue->queue_total >= queue->queue_maxlen) {
+ queue->queue_dropped++;
+ status = -ENOSPC;
+ if (net_ratelimit())
+ printk(KERN_WARNING "ip_queue: full at %d entries, "
+ "dropping packets(s). Dropped: %d\n",
+ queue->queue_total, queue->queue_dropped);
+ goto err_out_free_nskb;
+ }
+
+ /* nfnetlink_unicast will either free the nskb or add it to a socket */
+ status = nfnetlink_unicast(nskb, queue->peer_pid, MSG_DONTWAIT);
+ if (status < 0) {
+ queue->queue_user_dropped++;
+ goto err_out_unlock;
+ }
+
+ __enqueue_entry(queue, entry);
+
+ spin_unlock_bh(&queue->lock);
+ instance_put(queue);
+ return status;
+
+err_out_free_nskb:
+ kfree_skb(nskb);
+
+err_out_unlock:
+ spin_unlock_bh(&queue->lock);
+
+err_out_free:
+ kfree(entry);
+err_out_put:
+ instance_put(queue);
+ return status;
+}
+
+static int
+nfqnl_mangle(void *data, int data_len, struct nfqnl_queue_entry *e)
+{
+ int diff;
+
+ diff = data_len - e->skb->len;
+ if (diff < 0)
+ skb_trim(e->skb, data_len);
+ else if (diff > 0) {
+ if (data_len > 0xFFFF)
+ return -EINVAL;
+ if (diff > skb_tailroom(e->skb)) {
+ struct sk_buff *newskb;
+
+ newskb = skb_copy_expand(e->skb,
+ skb_headroom(e->skb),
+ diff,
+ GFP_ATOMIC);
+ if (newskb == NULL) {
+ printk(KERN_WARNING "ip_queue: OOM "
+ "in mangle, dropping packet\n");
+ return -ENOMEM;
+ }
+ if (e->skb->sk)
+ skb_set_owner_w(newskb, e->skb->sk);
+ kfree_skb(e->skb);
+ e->skb = newskb;
+ }
+ skb_put(e->skb, diff);
+ }
+ if (!skb_make_writable(&e->skb, data_len))
+ return -ENOMEM;
+ memcpy(e->skb->data, data, data_len);
+
+ return 0;
+}
+
+static inline int
+id_cmp(struct nfqnl_queue_entry *e, unsigned long id)
+{
+ return (id == e->id);
+}
+
+static int
+nfqnl_set_mode(struct nfqnl_instance *queue,
+ unsigned char mode, unsigned int range)
+{
+ int status;
+
+ spin_lock_bh(&queue->lock);
+ status = __nfqnl_set_mode(queue, mode, range);
+ spin_unlock_bh(&queue->lock);
+
+ return status;
+}
+
+static int
+dev_cmp(struct nfqnl_queue_entry *entry, unsigned long ifindex)
+{
+ if (entry->info->indev)
+ if (entry->info->indev->ifindex == ifindex)
+ return 1;
+
+ if (entry->info->outdev)
+ if (entry->info->outdev->ifindex == ifindex)
+ return 1;
+
+ return 0;
+}
+
+/* drop all packets with either indev or outdev == ifindex from all queue
+ * instances */
+static void
+nfqnl_dev_drop(int ifindex)
+{
+ int i;
+
+ QDEBUG("entering for ifindex %u\n", ifindex);
+
+ /* this only looks like we have to hold the readlock for a way too long
+ * time, issue_verdict(), nf_reinject(), ... - but we always only
+ * issue NF_DROP, which is processed directly in nf_reinject() */
+ read_lock_bh(&instances_lock);
+
+ for (i = 0; i < INSTANCE_BUCKETS; i++) {
+ struct hlist_node *tmp;
+ struct nfqnl_instance *inst;
+ struct hlist_head *head = &instance_table[i];
+
+ hlist_for_each_entry(inst, tmp, head, hlist) {
+ struct nfqnl_queue_entry *entry;
+ while ((entry = find_dequeue_entry(inst, dev_cmp,
+ ifindex)) != NULL)
+ issue_verdict(entry, NF_DROP);
+ }
+ }
+
+ read_unlock_bh(&instances_lock);
+}
+
+#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
+
+static int
+nfqnl_rcv_dev_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = ptr;
+
+ /* Drop any packets associated with the downed device */
+ if (event == NETDEV_DOWN)
+ nfqnl_dev_drop(dev->ifindex);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block nfqnl_dev_notifier = {
+ .notifier_call = nfqnl_rcv_dev_event,
+};
+
+static int
+nfqnl_rcv_nl_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct netlink_notify *n = ptr;
+
+ if (event == NETLINK_URELEASE &&
+ n->protocol == NETLINK_NETFILTER && n->pid) {
+ int i;
+
+ /* destroy all instances for this pid */
+ write_lock_bh(&instances_lock);
+ for (i = 0; i < INSTANCE_BUCKETS; i++) {
+ struct hlist_node *tmp, *t2;
+ struct nfqnl_instance *inst;
+ struct hlist_head *head = &instance_table[i];
+
+ hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) {
+ if (n->pid == inst->peer_pid)
+ __instance_destroy(inst);
+ }
+ }
+ write_unlock_bh(&instances_lock);
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block nfqnl_rtnl_notifier = {
+ .notifier_call = nfqnl_rcv_nl_event,
+};
+
+static const int nfqa_verdict_min[NFQA_MAX] = {
+ [NFQA_VERDICT_HDR-1] = sizeof(struct nfqnl_msg_verdict_hdr),
+ [NFQA_MARK-1] = sizeof(u_int32_t),
+ [NFQA_PAYLOAD-1] = 0,
+};
+
+static int
+nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+{
+ struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
+ u_int16_t queue_num = ntohs(nfmsg->res_id);
+
+ struct nfqnl_msg_verdict_hdr *vhdr;
+ struct nfqnl_instance *queue;
+ unsigned int verdict;
+ struct nfqnl_queue_entry *entry;
+ int err;
+
+ if (nfattr_bad_size(nfqa, NFQA_MAX, nfqa_verdict_min)) {
+ QDEBUG("bad attribute size\n");
+ return -EINVAL;
+ }
+
+ queue = instance_lookup_get(queue_num);
+ if (!queue)
+ return -ENODEV;
+
+ if (queue->peer_pid != NETLINK_CB(skb).pid) {
+ err = -EPERM;
+ goto err_out_put;
+ }
+
+ if (!nfqa[NFQA_VERDICT_HDR-1]) {
+ err = -EINVAL;
+ goto err_out_put;
+ }
+
+ vhdr = NFA_DATA(nfqa[NFQA_VERDICT_HDR-1]);
+ verdict = ntohl(vhdr->verdict);
+
+ if ((verdict & NF_VERDICT_MASK) > NF_MAX_VERDICT) {
+ err = -EINVAL;
+ goto err_out_put;
+ }
+
+ entry = find_dequeue_entry(queue, id_cmp, ntohl(vhdr->id));
+ if (entry == NULL) {
+ err = -ENOENT;
+ goto err_out_put;
+ }
+
+ if (nfqa[NFQA_PAYLOAD-1]) {
+ if (nfqnl_mangle(NFA_DATA(nfqa[NFQA_PAYLOAD-1]),
+ NFA_PAYLOAD(nfqa[NFQA_PAYLOAD-1]), entry) < 0)
+ verdict = NF_DROP;
+ }
+
+ if (nfqa[NFQA_MARK-1])
+ skb->nfmark = ntohl(*(u_int32_t *)NFA_DATA(nfqa[NFQA_MARK-1]));
+
+ issue_verdict(entry, verdict);
+ instance_put(queue);
+ return 0;
+
+err_out_put:
+ instance_put(queue);
+ return err;
+}
+
+static int
+nfqnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+{
+ return -ENOTSUPP;
+}
+
+static const int nfqa_cfg_min[NFQA_CFG_MAX] = {
+ [NFQA_CFG_CMD-1] = sizeof(struct nfqnl_msg_config_cmd),
+ [NFQA_CFG_PARAMS-1] = sizeof(struct nfqnl_msg_config_params),
+};
+
+static struct nf_queue_handler nfqh = {
+ .name = "nf_queue",
+ .outfn = &nfqnl_enqueue_packet,
+};
+
+static int
+nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
+ struct nlmsghdr *nlh, struct nfattr *nfqa[], int *errp)
+{
+ struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
+ u_int16_t queue_num = ntohs(nfmsg->res_id);
+ struct nfqnl_instance *queue;
+ int ret = 0;
+
+ QDEBUG("entering for msg %u\n", NFNL_MSG_TYPE(nlh->nlmsg_type));
+
+ if (nfattr_bad_size(nfqa, NFQA_CFG_MAX, nfqa_cfg_min)) {
+ QDEBUG("bad attribute size\n");
+ return -EINVAL;
+ }
+
+ queue = instance_lookup_get(queue_num);
+ if (nfqa[NFQA_CFG_CMD-1]) {
+ struct nfqnl_msg_config_cmd *cmd;
+ cmd = NFA_DATA(nfqa[NFQA_CFG_CMD-1]);
+ QDEBUG("found CFG_CMD\n");
+
+ switch (cmd->command) {
+ case NFQNL_CFG_CMD_BIND:
+ if (queue)
+ return -EBUSY;
+
+ queue = instance_create(queue_num, NETLINK_CB(skb).pid);
+ if (!queue)
+ return -EINVAL;
+ break;
+ case NFQNL_CFG_CMD_UNBIND:
+ if (!queue)
+ return -ENODEV;
+
+ if (queue->peer_pid != NETLINK_CB(skb).pid) {
+ ret = -EPERM;
+ goto out_put;
+ }
+
+ instance_destroy(queue);
+ break;
+ case NFQNL_CFG_CMD_PF_BIND:
+ QDEBUG("registering queue handler for pf=%u\n",
+ ntohs(cmd->pf));
+ ret = nf_register_queue_handler(ntohs(cmd->pf), &nfqh);
+ break;
+ case NFQNL_CFG_CMD_PF_UNBIND:
+ QDEBUG("unregistering queue handler for pf=%u\n",
+ ntohs(cmd->pf));
+ /* This is a bug and a feature. We can unregister
+ * other handlers(!) */
+ ret = nf_unregister_queue_handler(ntohs(cmd->pf));
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ } else {
+ if (!queue) {
+ QDEBUG("no config command, and no instance ENOENT\n");
+ ret = -ENOENT;
+ goto out_put;
+ }
+
+ if (queue->peer_pid != NETLINK_CB(skb).pid) {
+ QDEBUG("no config command, and wrong pid\n");
+ ret = -EPERM;
+ goto out_put;
+ }
+ }
+
+ if (nfqa[NFQA_CFG_PARAMS-1]) {
+ struct nfqnl_msg_config_params *params;
+ params = NFA_DATA(nfqa[NFQA_CFG_PARAMS-1]);
+
+ nfqnl_set_mode(queue, params->copy_mode,
+ ntohl(params->copy_range));
+ }
+
+out_put:
+ instance_put(queue);
+ return ret;
+}
+
+static struct nfnl_callback nfqnl_cb[NFQNL_MSG_MAX] = {
+ [NFQNL_MSG_PACKET] = { .call = nfqnl_recv_unsupp,
+ .attr_count = NFQA_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [NFQNL_MSG_VERDICT] = { .call = nfqnl_recv_verdict,
+ .attr_count = NFQA_MAX,
+ .cap_required = CAP_NET_ADMIN },
+ [NFQNL_MSG_CONFIG] = { .call = nfqnl_recv_config,
+ .attr_count = NFQA_CFG_MAX,
+ .cap_required = CAP_NET_ADMIN },
+};
+
+static struct nfnetlink_subsystem nfqnl_subsys = {
+ .name = "nf_queue",
+ .subsys_id = NFNL_SUBSYS_QUEUE,
+ .cb_count = NFQNL_MSG_MAX,
+ .cb = nfqnl_cb,
+};
+
+#ifdef CONFIG_PROC_FS
+struct iter_state {
+ unsigned int bucket;
+};
+
+static struct hlist_node *get_first(struct seq_file *seq)
+{
+ struct iter_state *st = seq->private;
+
+ if (!st)
+ return NULL;
+
+ for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) {
+ if (!hlist_empty(&instance_table[st->bucket]))
+ return instance_table[st->bucket].first;
+ }
+ return NULL;
+}
+
+static struct hlist_node *get_next(struct seq_file *seq, struct hlist_node *h)
+{
+ struct iter_state *st = seq->private;
+
+ h = h->next;
+ while (!h) {
+ if (++st->bucket >= INSTANCE_BUCKETS)
+ return NULL;
+
+ h = instance_table[st->bucket].first;
+ }
+ return h;
+}
+
+static struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
+{
+ struct hlist_node *head;
+ head = get_first(seq);
+
+ if (head)
+ while (pos && (head = get_next(seq, head)))
+ pos--;
+ return pos ? NULL : head;
+}
+
+static void *seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock_bh(&instances_lock);
+ return get_idx(seq, *pos);
+}
+
+static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
+{
+ (*pos)++;
+ return get_next(s, v);
+}
+
+static void seq_stop(struct seq_file *s, void *v)
+{
+ read_unlock_bh(&instances_lock);
+}
+
+static int seq_show(struct seq_file *s, void *v)
+{
+ const struct nfqnl_instance *inst = v;
+
+ return seq_printf(s, "%5d %6d %5d %1d %5d %5d %5d %8d %2d\n",
+ inst->queue_num,
+ inst->peer_pid, inst->queue_total,
+ inst->copy_mode, inst->copy_range,
+ inst->queue_dropped, inst->queue_user_dropped,
+ atomic_read(&inst->id_sequence),
+ atomic_read(&inst->use));
+}
+
+static struct seq_operations nfqnl_seq_ops = {
+ .start = seq_start,
+ .next = seq_next,
+ .stop = seq_stop,
+ .show = seq_show,
+};
+
+static int nfqnl_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ struct iter_state *is;
+ int ret;
+
+ is = kmalloc(sizeof(*is), GFP_KERNEL);
+ if (!is)
+ return -ENOMEM;
+ memset(is, 0, sizeof(*is));
+ ret = seq_open(file, &nfqnl_seq_ops);
+ if (ret < 0)
+ goto out_free;
+ seq = file->private_data;
+ seq->private = is;
+ return ret;
+out_free:
+ kfree(is);
+ return ret;
+}
+
+static struct file_operations nfqnl_file_ops = {
+ .owner = THIS_MODULE,
+ .open = nfqnl_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+#endif /* PROC_FS */
+
+static int
+init_or_cleanup(int init)
+{
+ int i, status = -ENOMEM;
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc_nfqueue;
+#endif
+
+ if (!init)
+ goto cleanup;
+
+ for (i = 0; i < INSTANCE_BUCKETS; i++)
+ INIT_HLIST_HEAD(&instance_table[i]);
+
+ netlink_register_notifier(&nfqnl_rtnl_notifier);
+ status = nfnetlink_subsys_register(&nfqnl_subsys);
+ if (status < 0) {
+ printk(KERN_ERR "nf_queue: failed to create netlink socket\n");
+ goto cleanup_netlink_notifier;
+ }
+
+#ifdef CONFIG_PROC_FS
+ proc_nfqueue = create_proc_entry("nfnetlink_queue", 0440,
+ proc_net_netfilter);
+ if (!proc_nfqueue)
+ goto cleanup_subsys;
+ proc_nfqueue->proc_fops = &nfqnl_file_ops;
+#endif
+
+ register_netdevice_notifier(&nfqnl_dev_notifier);
+
+ return status;
+
+cleanup:
+ nf_unregister_queue_handlers(&nfqh);
+ unregister_netdevice_notifier(&nfqnl_dev_notifier);
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("nfnetlink_queue", proc_net_netfilter);
+cleanup_subsys:
+#endif
+ nfnetlink_subsys_unregister(&nfqnl_subsys);
+cleanup_netlink_notifier:
+ netlink_unregister_notifier(&nfqnl_rtnl_notifier);
+ return status;
+}
+
+static int __init init(void)
+{
+
+ return init_or_cleanup(1);
+}
+
+static void __exit fini(void)
+{
+ init_or_cleanup(0);
+}
+
+MODULE_DESCRIPTION("netfilter packet queue handler");
+MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_QUEUE);
+
+module_init(init);
+module_exit(fini);
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index ff774a06c89d..62435ffc6184 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -13,7 +13,12 @@
* added netlink_proto_exit
* Tue Jan 22 18:32:44 BRST 2002 Arnaldo C. de Melo <acme@conectiva.com.br>
* use nlk_sk, as sk->protinfo is on a diet 8)
- *
+ * Fri Jul 22 19:51:12 MEST 2005 Harald Welte <laforge@gnumonks.org>
+ * - inc module use count of module that owns
+ * the kernel socket in case userspace opens
+ * socket of same protocol
+ * - remove all module support, since netlink is
+ * mandatory if CONFIG_NET=y these days
*/
#include <linux/config.h>
@@ -55,21 +60,29 @@
#include <net/scm.h>
#define Nprintk(a...)
+#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
struct netlink_sock {
/* struct sock has to be the first member of netlink_sock */
struct sock sk;
u32 pid;
- unsigned int groups;
u32 dst_pid;
- unsigned int dst_groups;
+ u32 dst_group;
+ u32 flags;
+ u32 subscriptions;
+ u32 ngroups;
+ unsigned long *groups;
unsigned long state;
wait_queue_head_t wait;
struct netlink_callback *cb;
spinlock_t cb_lock;
void (*data_ready)(struct sock *sk, int bytes);
+ struct module *module;
};
+#define NETLINK_KERNEL_SOCKET 0x1
+#define NETLINK_RECV_PKTINFO 0x2
+
static inline struct netlink_sock *nlk_sk(struct sock *sk)
{
return (struct netlink_sock *)sk;
@@ -92,6 +105,9 @@ struct netlink_table {
struct nl_pid_hash hash;
struct hlist_head mc_list;
unsigned int nl_nonroot;
+ unsigned int groups;
+ struct module *module;
+ int registered;
};
static struct netlink_table *nl_table;
@@ -106,6 +122,11 @@ static atomic_t nl_table_users = ATOMIC_INIT(0);
static struct notifier_block *netlink_chain;
+static u32 netlink_group_mask(u32 group)
+{
+ return group ? 1 << (group - 1) : 0;
+}
+
static struct hlist_head *nl_pid_hashfn(struct nl_pid_hash *hash, u32 pid)
{
return &hash->table[jhash_1word(pid, hash->rnd) & hash->mask];
@@ -122,6 +143,7 @@ static void netlink_sock_destruct(struct sock *sk)
BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc));
BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc));
BUG_TRAP(!nlk_sk(sk)->cb);
+ BUG_TRAP(!nlk_sk(sk)->groups);
}
/* This lock without WQ_FLAG_EXCLUSIVE is good on UP and it is _very_ bad on SMP.
@@ -317,7 +339,7 @@ static void netlink_remove(struct sock *sk)
netlink_table_grab();
if (sk_del_node_init(sk))
nl_table[sk->sk_protocol].hash.entries--;
- if (nlk_sk(sk)->groups)
+ if (nlk_sk(sk)->subscriptions)
__sk_del_bind_node(sk);
netlink_table_ungrab();
}
@@ -328,19 +350,11 @@ static struct proto netlink_proto = {
.obj_size = sizeof(struct netlink_sock),
};
-static int netlink_create(struct socket *sock, int protocol)
+static int __netlink_create(struct socket *sock, int protocol)
{
struct sock *sk;
struct netlink_sock *nlk;
- sock->state = SS_UNCONNECTED;
-
- if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
- return -ESOCKTNOSUPPORT;
-
- if (protocol<0 || protocol >= MAX_LINKS)
- return -EPROTONOSUPPORT;
-
sock->ops = &netlink_ops;
sk = sk_alloc(PF_NETLINK, GFP_KERNEL, &netlink_proto, 1);
@@ -350,15 +364,67 @@ static int netlink_create(struct socket *sock, int protocol)
sock_init_data(sock, sk);
nlk = nlk_sk(sk);
-
spin_lock_init(&nlk->cb_lock);
init_waitqueue_head(&nlk->wait);
- sk->sk_destruct = netlink_sock_destruct;
+ sk->sk_destruct = netlink_sock_destruct;
sk->sk_protocol = protocol;
return 0;
}
+static int netlink_create(struct socket *sock, int protocol)
+{
+ struct module *module = NULL;
+ struct netlink_sock *nlk;
+ unsigned int groups;
+ int err = 0;
+
+ sock->state = SS_UNCONNECTED;
+
+ if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
+ return -ESOCKTNOSUPPORT;
+
+ if (protocol<0 || protocol >= MAX_LINKS)
+ return -EPROTONOSUPPORT;
+
+ netlink_lock_table();
+#ifdef CONFIG_KMOD
+ if (!nl_table[protocol].registered) {
+ netlink_unlock_table();
+ request_module("net-pf-%d-proto-%d", PF_NETLINK, protocol);
+ netlink_lock_table();
+ }
+#endif
+ if (nl_table[protocol].registered &&
+ try_module_get(nl_table[protocol].module))
+ module = nl_table[protocol].module;
+ else
+ err = -EPROTONOSUPPORT;
+ groups = nl_table[protocol].groups;
+ netlink_unlock_table();
+
+ if (err || (err = __netlink_create(sock, protocol) < 0))
+ goto out_module;
+
+ nlk = nlk_sk(sock->sk);
+
+ nlk->groups = kmalloc(NLGRPSZ(groups), GFP_KERNEL);
+ if (nlk->groups == NULL) {
+ err = -ENOMEM;
+ goto out_module;
+ }
+ memset(nlk->groups, 0, NLGRPSZ(groups));
+ nlk->ngroups = groups;
+
+ nlk->module = module;
+out:
+ return err;
+
+out_module:
+ module_put(module);
+ goto out;
+}
+
static int netlink_release(struct socket *sock)
{
struct sock *sk = sock->sk;
@@ -387,14 +453,27 @@ static int netlink_release(struct socket *sock)
skb_queue_purge(&sk->sk_write_queue);
- if (nlk->pid && !nlk->groups) {
+ if (nlk->pid && !nlk->subscriptions) {
struct netlink_notify n = {
.protocol = sk->sk_protocol,
.pid = nlk->pid,
};
notifier_call_chain(&netlink_chain, NETLINK_URELEASE, &n);
}
-
+
+ if (nlk->module)
+ module_put(nlk->module);
+
+ if (nlk->flags & NETLINK_KERNEL_SOCKET) {
+ netlink_table_grab();
+ nl_table[sk->sk_protocol].module = NULL;
+ nl_table[sk->sk_protocol].registered = 0;
+ netlink_table_ungrab();
+ }
+
+ kfree(nlk->groups);
+ nlk->groups = NULL;
+
sock_put(sk);
return 0;
}
@@ -443,6 +522,18 @@ static inline int netlink_capable(struct socket *sock, unsigned int flag)
capable(CAP_NET_ADMIN);
}
+static void
+netlink_update_subscriptions(struct sock *sk, unsigned int subscriptions)
+{
+ struct netlink_sock *nlk = nlk_sk(sk);
+
+ if (nlk->subscriptions && !subscriptions)
+ __sk_del_bind_node(sk);
+ else if (!nlk->subscriptions && subscriptions)
+ sk_add_bind_node(sk, &nl_table[sk->sk_protocol].mc_list);
+ nlk->subscriptions = subscriptions;
+}
+
static int netlink_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
{
struct sock *sk = sock->sk;
@@ -468,15 +559,14 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr, int addr_len
return err;
}
- if (!nladdr->nl_groups && !nlk->groups)
+ if (!nladdr->nl_groups && !(u32)nlk->groups[0])
return 0;
netlink_table_grab();
- if (nlk->groups && !nladdr->nl_groups)
- __sk_del_bind_node(sk);
- else if (!nlk->groups && nladdr->nl_groups)
- sk_add_bind_node(sk, &nl_table[sk->sk_protocol].mc_list);
- nlk->groups = nladdr->nl_groups;
+ netlink_update_subscriptions(sk, nlk->subscriptions +
+ hweight32(nladdr->nl_groups) -
+ hweight32(nlk->groups[0]));
+ nlk->groups[0] = (nlk->groups[0] & ~0xffffffffUL) | nladdr->nl_groups;
netlink_table_ungrab();
return 0;
@@ -493,7 +583,7 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
if (addr->sa_family == AF_UNSPEC) {
sk->sk_state = NETLINK_UNCONNECTED;
nlk->dst_pid = 0;
- nlk->dst_groups = 0;
+ nlk->dst_group = 0;
return 0;
}
if (addr->sa_family != AF_NETLINK)
@@ -509,7 +599,7 @@ static int netlink_connect(struct socket *sock, struct sockaddr *addr,
if (err == 0) {
sk->sk_state = NETLINK_CONNECTED;
nlk->dst_pid = nladdr->nl_pid;
- nlk->dst_groups = nladdr->nl_groups;
+ nlk->dst_group = ffs(nladdr->nl_groups);
}
return err;
@@ -527,10 +617,10 @@ static int netlink_getname(struct socket *sock, struct sockaddr *addr, int *addr
if (peer) {
nladdr->nl_pid = nlk->dst_pid;
- nladdr->nl_groups = nlk->dst_groups;
+ nladdr->nl_groups = netlink_group_mask(nlk->dst_group);
} else {
nladdr->nl_pid = nlk->pid;
- nladdr->nl_groups = nlk->groups;
+ nladdr->nl_groups = nlk->groups[0];
}
return 0;
}
@@ -731,7 +821,8 @@ static inline int do_one_broadcast(struct sock *sk,
if (p->exclude_sk == sk)
goto out;
- if (nlk->pid == p->pid || !(nlk->groups & p->group))
+ if (nlk->pid == p->pid || p->group - 1 >= nlk->ngroups ||
+ !test_bit(p->group - 1, nlk->groups))
goto out;
if (p->failure) {
@@ -770,7 +861,7 @@ out:
}
int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid,
- u32 group, int allocation)
+ u32 group, unsigned int __nocast allocation)
{
struct netlink_broadcast_data info;
struct hlist_node *node;
@@ -827,7 +918,8 @@ static inline int do_one_set_err(struct sock *sk,
if (sk == p->exclude_sk)
goto out;
- if (nlk->pid == p->pid || !(nlk->groups & p->group))
+ if (nlk->pid == p->pid || p->group - 1 >= nlk->ngroups ||
+ !test_bit(p->group - 1, nlk->groups))
goto out;
sk->sk_err = p->code;
@@ -855,6 +947,94 @@ void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
read_unlock(&nl_table_lock);
}
+static int netlink_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct netlink_sock *nlk = nlk_sk(sk);
+ int val = 0, err;
+
+ if (level != SOL_NETLINK)
+ return -ENOPROTOOPT;
+
+ if (optlen >= sizeof(int) &&
+ get_user(val, (int __user *)optval))
+ return -EFAULT;
+
+ switch (optname) {
+ case NETLINK_PKTINFO:
+ if (val)
+ nlk->flags |= NETLINK_RECV_PKTINFO;
+ else
+ nlk->flags &= ~NETLINK_RECV_PKTINFO;
+ err = 0;
+ break;
+ case NETLINK_ADD_MEMBERSHIP:
+ case NETLINK_DROP_MEMBERSHIP: {
+ unsigned int subscriptions;
+ int old, new = optname == NETLINK_ADD_MEMBERSHIP ? 1 : 0;
+
+ if (!netlink_capable(sock, NL_NONROOT_RECV))
+ return -EPERM;
+ if (!val || val - 1 >= nlk->ngroups)
+ return -EINVAL;
+ netlink_table_grab();
+ old = test_bit(val - 1, nlk->groups);
+ subscriptions = nlk->subscriptions - old + new;
+ if (new)
+ __set_bit(val - 1, nlk->groups);
+ else
+ __clear_bit(val - 1, nlk->groups);
+ netlink_update_subscriptions(sk, subscriptions);
+ netlink_table_ungrab();
+ err = 0;
+ break;
+ }
+ default:
+ err = -ENOPROTOOPT;
+ }
+ return err;
+}
+
+static int netlink_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ struct netlink_sock *nlk = nlk_sk(sk);
+ int len, val, err;
+
+ if (level != SOL_NETLINK)
+ return -ENOPROTOOPT;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+ if (len < 0)
+ return -EINVAL;
+
+ switch (optname) {
+ case NETLINK_PKTINFO:
+ if (len < sizeof(int))
+ return -EINVAL;
+ len = sizeof(int);
+ val = nlk->flags & NETLINK_RECV_PKTINFO ? 1 : 0;
+ put_user(len, optlen);
+ put_user(val, optval);
+ err = 0;
+ break;
+ default:
+ err = -ENOPROTOOPT;
+ }
+ return err;
+}
+
+static void netlink_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb)
+{
+ struct nl_pktinfo info;
+
+ info.group = NETLINK_CB(skb).dst_group;
+ put_cmsg(msg, SOL_NETLINK, NETLINK_PKTINFO, sizeof(info), &info);
+}
+
static inline void netlink_rcv_wake(struct sock *sk)
{
struct netlink_sock *nlk = nlk_sk(sk);
@@ -873,7 +1053,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
struct netlink_sock *nlk = nlk_sk(sk);
struct sockaddr_nl *addr=msg->msg_name;
u32 dst_pid;
- u32 dst_groups;
+ u32 dst_group;
struct sk_buff *skb;
int err;
struct scm_cookie scm;
@@ -891,12 +1071,12 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
if (addr->nl_family != AF_NETLINK)
return -EINVAL;
dst_pid = addr->nl_pid;
- dst_groups = addr->nl_groups;
- if (dst_groups && !netlink_capable(sock, NL_NONROOT_SEND))
+ dst_group = ffs(addr->nl_groups);
+ if (dst_group && !netlink_capable(sock, NL_NONROOT_SEND))
return -EPERM;
} else {
dst_pid = nlk->dst_pid;
- dst_groups = nlk->dst_groups;
+ dst_group = nlk->dst_group;
}
if (!nlk->pid) {
@@ -914,9 +1094,8 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
goto out;
NETLINK_CB(skb).pid = nlk->pid;
- NETLINK_CB(skb).groups = nlk->groups;
NETLINK_CB(skb).dst_pid = dst_pid;
- NETLINK_CB(skb).dst_groups = dst_groups;
+ NETLINK_CB(skb).dst_group = dst_group;
NETLINK_CB(skb).loginuid = audit_get_loginuid(current->audit_context);
memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
@@ -938,9 +1117,9 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
goto out;
}
- if (dst_groups) {
+ if (dst_group) {
atomic_inc(&skb->users);
- netlink_broadcast(sk, skb, dst_pid, dst_groups, GFP_KERNEL);
+ netlink_broadcast(sk, skb, dst_pid, dst_group, GFP_KERNEL);
}
err = netlink_unicast(sk, skb, dst_pid, msg->msg_flags&MSG_DONTWAIT);
@@ -986,7 +1165,7 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
addr->nl_family = AF_NETLINK;
addr->nl_pad = 0;
addr->nl_pid = NETLINK_CB(skb).pid;
- addr->nl_groups = NETLINK_CB(skb).dst_groups;
+ addr->nl_groups = netlink_group_mask(NETLINK_CB(skb).dst_group);
msg->msg_namelen = sizeof(*addr);
}
@@ -1001,6 +1180,8 @@ static int netlink_recvmsg(struct kiocb *kiocb, struct socket *sock,
netlink_dump(sk);
scm_recv(sock, msg, siocb->scm, flags);
+ if (nlk->flags & NETLINK_RECV_PKTINFO)
+ netlink_cmsg_recv_pktinfo(msg, skb);
out:
netlink_rcv_wake(sk);
@@ -1023,10 +1204,13 @@ static void netlink_data_ready(struct sock *sk, int len)
*/
struct sock *
-netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len))
+netlink_kernel_create(int unit, unsigned int groups,
+ void (*input)(struct sock *sk, int len),
+ struct module *module)
{
struct socket *sock;
struct sock *sk;
+ struct netlink_sock *nlk;
if (!nl_table)
return NULL;
@@ -1037,20 +1221,31 @@ netlink_kernel_create(int unit, void (*input)(struct sock *sk, int len))
if (sock_create_lite(PF_NETLINK, SOCK_DGRAM, unit, &sock))
return NULL;
- if (netlink_create(sock, unit) < 0) {
- sock_release(sock);
- return NULL;
- }
+ if (__netlink_create(sock, unit) < 0)
+ goto out_sock_release;
+
sk = sock->sk;
sk->sk_data_ready = netlink_data_ready;
if (input)
nlk_sk(sk)->data_ready = input;
- if (netlink_insert(sk, 0)) {
- sock_release(sock);
- return NULL;
- }
+ if (netlink_insert(sk, 0))
+ goto out_sock_release;
+
+ nlk = nlk_sk(sk);
+ nlk->flags |= NETLINK_KERNEL_SOCKET;
+
+ netlink_table_grab();
+ nl_table[unit].groups = groups < 32 ? 32 : groups;
+ nl_table[unit].module = module;
+ nl_table[unit].registered = 1;
+ netlink_table_ungrab();
+
return sk;
+
+out_sock_release:
+ sock_release(sock);
+ return NULL;
}
void netlink_set_nonroot(int protocol, unsigned int flags)
@@ -1288,7 +1483,8 @@ static int netlink_seq_show(struct seq_file *seq, void *v)
s,
s->sk_protocol,
nlk->pid,
- nlk->groups,
+ nlk->flags & NETLINK_KERNEL_SOCKET ?
+ 0 : (unsigned int)nlk->groups[0],
atomic_read(&s->sk_rmem_alloc),
atomic_read(&s->sk_wmem_alloc),
nlk->cb,
@@ -1362,8 +1558,8 @@ static struct proto_ops netlink_ops = {
.ioctl = sock_no_ioctl,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
- .setsockopt = sock_no_setsockopt,
- .getsockopt = sock_no_getsockopt,
+ .setsockopt = netlink_setsockopt,
+ .getsockopt = netlink_getsockopt,
.sendmsg = netlink_sendmsg,
.recvmsg = netlink_recvmsg,
.mmap = sock_no_mmap,
@@ -1438,21 +1634,7 @@ out:
return err;
}
-static void __exit netlink_proto_exit(void)
-{
- sock_unregister(PF_NETLINK);
- proc_net_remove("netlink");
- kfree(nl_table);
- nl_table = NULL;
- proto_unregister(&netlink_proto);
-}
-
core_initcall(netlink_proto_init);
-module_exit(netlink_proto_exit);
-
-MODULE_LICENSE("GPL");
-
-MODULE_ALIAS_NETPROTO(PF_NETLINK);
EXPORT_SYMBOL(netlink_ack);
EXPORT_SYMBOL(netlink_broadcast);
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 162a85fed150..4b53de982114 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -39,7 +39,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/ip.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/arp.h>
#include <linux/init.h>
@@ -858,17 +858,16 @@ int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
frametype = skb->data[19] & 0x0F;
flags = skb->data[19] & 0xF0;
-#ifdef CONFIG_INET
/*
* Check for an incoming IP over NET/ROM frame.
*/
- if (frametype == NR_PROTOEXT && circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
+ if (frametype == NR_PROTOEXT &&
+ circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
skb->h.raw = skb->data;
return nr_rx_ip(skb, dev);
}
-#endif
/*
* Find an existing socket connection, based on circuit ID, if it's
diff --git a/net/netrom/nr_dev.c b/net/netrom/nr_dev.c
index 220bf7494f71..263da4c26494 100644
--- a/net/netrom/nr_dev.c
+++ b/net/netrom/nr_dev.c
@@ -38,8 +38,6 @@
#include <net/ax25.h>
#include <net/netrom.h>
-#ifdef CONFIG_INET
-
/*
* Only allow IP over NET/ROM frames through if the netrom device is up.
*/
@@ -64,11 +62,12 @@ int nr_rx_ip(struct sk_buff *skb, struct net_device *dev)
skb->nh.raw = skb->data;
skb->pkt_type = PACKET_HOST;
- ip_rcv(skb, skb->dev, NULL);
+ netif_rx(skb);
return 1;
}
+#ifdef CONFIG_INET
static int nr_rebuild_header(struct sk_buff *skb)
{
diff --git a/net/netrom/nr_in.c b/net/netrom/nr_in.c
index 9c44b3794126..64b81a796907 100644
--- a/net/netrom/nr_in.c
+++ b/net/netrom/nr_in.c
@@ -22,8 +22,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
-#include <net/ip.h> /* For ip_rcv */
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
diff --git a/net/netrom/nr_subr.c b/net/netrom/nr_subr.c
index 0627347b14b8..587bed2674bf 100644
--- a/net/netrom/nr_subr.c
+++ b/net/netrom/nr_subr.c
@@ -21,7 +21,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
@@ -77,7 +77,7 @@ void nr_requeue_frames(struct sock *sk)
if (skb_prev == NULL)
skb_queue_head(&sk->sk_write_queue, skb);
else
- skb_append(skb_prev, skb);
+ skb_append(skb_prev, skb, &sk->sk_write_queue);
skb_prev = skb;
}
}
diff --git a/net/netrom/nr_timer.c b/net/netrom/nr_timer.c
index faabda8088be..75b72d389ba9 100644
--- a/net/netrom/nr_timer.c
+++ b/net/netrom/nr_timer.c
@@ -22,7 +22,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index c9d5980aa4de..ba997095f08f 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -241,7 +241,7 @@ static struct proto_ops packet_ops;
#ifdef CONFIG_SOCK_PACKET
static struct proto_ops packet_ops_spkt;
-static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct sock *sk;
struct sockaddr_pkt *spkt;
@@ -441,7 +441,7 @@ static inline unsigned run_filter(struct sk_buff *skb, struct sock *sk, unsigned
we will not harm anyone.
*/
-static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct sock *sk;
struct sockaddr_ll *sll;
@@ -546,7 +546,7 @@ drop:
}
#ifdef CONFIG_PACKET_MMAP
-static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt)
+static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
struct sock *sk;
struct packet_sock *po;
@@ -635,12 +635,12 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct pack
h->tp_snaplen = snaplen;
h->tp_mac = macoff;
h->tp_net = netoff;
- if (skb->stamp.tv_sec == 0) {
- do_gettimeofday(&skb->stamp);
+ if (skb->tstamp.off_sec == 0) {
+ __net_timestamp(skb);
sock_enable_timestamp(sk);
}
- h->tp_sec = skb->stamp.tv_sec;
- h->tp_usec = skb->stamp.tv_usec;
+ h->tp_sec = skb_tv_base.tv_sec + skb->tstamp.off_sec;
+ h->tp_usec = skb_tv_base.tv_usec + skb->tstamp.off_usec;
sll = (struct sockaddr_ll*)((u8*)h + TPACKET_ALIGN(sizeof(*h)));
sll->sll_halen = 0;
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 5480caf8ccc2..c6e59f84c3ae 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -41,7 +41,7 @@
#include <net/rose.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/ip.h>
#include <net/arp.h>
diff --git a/net/rose/rose_in.c b/net/rose/rose_in.c
index ef475a1bb1ba..8348d33f1efe 100644
--- a/net/rose/rose_in.c
+++ b/net/rose/rose_in.c
@@ -26,8 +26,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/ip.h> /* For ip_rcv */
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c
index 25da6f699fd0..4510cd7613ec 100644
--- a/net/rose/rose_route.c
+++ b/net/rose/rose_route.c
@@ -24,7 +24,7 @@
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <linux/fcntl.h>
diff --git a/net/rose/rose_subr.c b/net/rose/rose_subr.c
index 7db7e1cedc3a..a29a3a960fd6 100644
--- a/net/rose/rose_subr.c
+++ b/net/rose/rose_subr.c
@@ -21,7 +21,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
@@ -74,7 +74,7 @@ void rose_requeue_frames(struct sock *sk)
if (skb_prev == NULL)
skb_queue_head(&sk->sk_write_queue, skb);
else
- skb_append(skb_prev, skb);
+ skb_append(skb_prev, skb, &sk->sk_write_queue);
skb_prev = skb;
}
}
diff --git a/net/rose/rose_timer.c b/net/rose/rose_timer.c
index 84dd4403f792..50ae0371dab8 100644
--- a/net/rose/rose_timer.c
+++ b/net/rose/rose_timer.c
@@ -22,7 +22,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
diff --git a/net/rxrpc/transport.c b/net/rxrpc/transport.c
index 9bce7794130a..122c086ee2db 100644
--- a/net/rxrpc/transport.c
+++ b/net/rxrpc/transport.c
@@ -330,7 +330,7 @@ static int rxrpc_incoming_msg(struct rxrpc_transport *trans,
msg->trans = trans;
msg->state = RXRPC_MSG_RECEIVED;
- msg->stamp = pkt->stamp;
+ skb_get_timestamp(pkt, &msg->stamp);
if (msg->stamp.tv_sec == 0) {
do_gettimeofday(&msg->stamp);
if (pkt->sk)
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index 59d3e71f8b85..45d3bc0812c8 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -491,6 +491,7 @@ config NET_EMATCH_TEXT
depends on NET_EMATCH
select TEXTSEARCH
select TEXTSEARCH_KMP
+ select TEXTSEARCH_BM
select TEXTSEARCH_FSM
---help---
Say Y here if you want to be ablt to classify packets based on
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 249c61936ea0..8aebe8f6d271 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -165,7 +165,7 @@ int tcf_action_exec(struct sk_buff *skb, struct tc_action *act,
while ((a = act) != NULL) {
repeat:
if (a->ops && a->ops->act) {
- ret = a->ops->act(&skb, a);
+ ret = a->ops->act(&skb, a, res);
if (TC_MUNGED & skb->tc_verd) {
/* copied already, allow trampling */
skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
@@ -179,11 +179,6 @@ repeat:
act = a->next;
}
exec_done:
- if (skb->tc_classid > 0) {
- res->classid = skb->tc_classid;
- res->class = 0;
- skb->tc_classid = 0;
- }
return ret;
}
@@ -598,7 +593,7 @@ static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
nlh->nlmsg_flags |= NLM_F_ROOT;
module_put(a->ops->owner);
kfree(a);
- err = rtnetlink_send(skb, pid, RTMGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+ err = rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
if (err > 0)
return 0;
@@ -661,7 +656,7 @@ tca_action_gd(struct rtattr *rta, struct nlmsghdr *n, u32 pid, int event)
/* now do the delete */
tcf_action_destroy(head, 0);
- ret = rtnetlink_send(skb, pid, RTMGRP_TC,
+ ret = rtnetlink_send(skb, pid, RTNLGRP_TC,
n->nlmsg_flags&NLM_F_ECHO);
if (ret > 0)
return 0;
@@ -703,9 +698,9 @@ static int tcf_add_notify(struct tc_action *a, u32 pid, u32 seq, int event,
x->rta_len = skb->tail - (u8*)x;
nlh->nlmsg_len = skb->tail - b;
- NETLINK_CB(skb).dst_groups = RTMGRP_TC;
+ NETLINK_CB(skb).dst_group = RTNLGRP_TC;
- err = rtnetlink_send(skb, pid, RTMGRP_TC, flags&NLM_F_ECHO);
+ err = rtnetlink_send(skb, pid, RTNLGRP_TC, flags&NLM_F_ECHO);
if (err > 0)
err = 0;
return err;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 3b5714ef4d1a..b4d89fbb3782 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -367,7 +367,7 @@ static int tfilter_notify(struct sk_buff *oskb, struct nlmsghdr *n,
return -EINVAL;
}
- return rtnetlink_send(skb, pid, RTMGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+ return rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
}
struct tcf_dump_args
diff --git a/net/sched/gact.c b/net/sched/gact.c
index a811c89fef7f..d1c6d542912a 100644
--- a/net/sched/gact.c
+++ b/net/sched/gact.c
@@ -135,7 +135,7 @@ tcf_gact_cleanup(struct tc_action *a, int bind)
}
static int
-tcf_gact(struct sk_buff **pskb, struct tc_action *a)
+tcf_gact(struct sk_buff **pskb, struct tc_action *a, struct tcf_result *res)
{
struct tcf_gact *p = PRIV(a, gact);
struct sk_buff *skb = *pskb;
diff --git a/net/sched/ipt.c b/net/sched/ipt.c
index b114d994d523..f50136eed211 100644
--- a/net/sched/ipt.c
+++ b/net/sched/ipt.c
@@ -201,7 +201,7 @@ tcf_ipt_cleanup(struct tc_action *a, int bind)
}
static int
-tcf_ipt(struct sk_buff **pskb, struct tc_action *a)
+tcf_ipt(struct sk_buff **pskb, struct tc_action *a, struct tcf_result *res)
{
int ret = 0, result = 0;
struct tcf_ipt *p = PRIV(a, ipt);
diff --git a/net/sched/mirred.c b/net/sched/mirred.c
index f309ce336803..20d06916dc0b 100644
--- a/net/sched/mirred.c
+++ b/net/sched/mirred.c
@@ -158,7 +158,7 @@ tcf_mirred_cleanup(struct tc_action *a, int bind)
}
static int
-tcf_mirred(struct sk_buff **pskb, struct tc_action *a)
+tcf_mirred(struct sk_buff **pskb, struct tc_action *a, struct tcf_result *res)
{
struct tcf_mirred *p = PRIV(a, mirred);
struct net_device *dev;
diff --git a/net/sched/pedit.c b/net/sched/pedit.c
index 678be6a645fb..767d24f4610e 100644
--- a/net/sched/pedit.c
+++ b/net/sched/pedit.c
@@ -130,7 +130,7 @@ tcf_pedit_cleanup(struct tc_action *a, int bind)
}
static int
-tcf_pedit(struct sk_buff **pskb, struct tc_action *a)
+tcf_pedit(struct sk_buff **pskb, struct tc_action *a, struct tcf_result *res)
{
struct tcf_pedit *p = PRIV(a, pedit);
struct sk_buff *skb = *pskb;
diff --git a/net/sched/police.c b/net/sched/police.c
index c03545faf523..eb39fb2f39b6 100644
--- a/net/sched/police.c
+++ b/net/sched/police.c
@@ -284,7 +284,8 @@ static int tcf_act_police_cleanup(struct tc_action *a, int bind)
return 0;
}
-static int tcf_act_police(struct sk_buff **pskb, struct tc_action *a)
+static int tcf_act_police(struct sk_buff **pskb, struct tc_action *a,
+ struct tcf_result *res)
{
psched_time_t now;
struct sk_buff *skb = *pskb;
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index b9a069af4a02..737681cb9a92 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -816,7 +816,7 @@ static int qdisc_notify(struct sk_buff *oskb, struct nlmsghdr *n,
}
if (skb->len)
- return rtnetlink_send(skb, pid, RTMGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+ return rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
err_out:
kfree_skb(skb);
@@ -1040,7 +1040,7 @@ static int tclass_notify(struct sk_buff *oskb, struct nlmsghdr *n,
return -EINVAL;
}
- return rtnetlink_send(skb, pid, RTMGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+ return rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
}
struct qdisc_dump_args
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 0d066c965342..99ceb91f0150 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -238,6 +238,20 @@ static void dev_watchdog_down(struct net_device *dev)
spin_unlock_bh(&dev->xmit_lock);
}
+void netif_carrier_on(struct net_device *dev)
+{
+ if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
+ linkwatch_fire_event(dev);
+ if (netif_running(dev))
+ __netdev_watchdog_up(dev);
+}
+
+void netif_carrier_off(struct net_device *dev)
+{
+ if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
+ linkwatch_fire_event(dev);
+}
+
/* "NOOP" scheduler: the best scheduler, recommended for all interfaces
under all circumstances. It is difficult to invent anything faster or
cheaper.
@@ -600,6 +614,8 @@ void dev_shutdown(struct net_device *dev)
}
EXPORT_SYMBOL(__netdev_watchdog_up);
+EXPORT_SYMBOL(netif_carrier_on);
+EXPORT_SYMBOL(netif_carrier_off);
EXPORT_SYMBOL(noop_qdisc);
EXPORT_SYMBOL(noop_qdisc_ops);
EXPORT_SYMBOL(qdisc_create_dflt);
diff --git a/net/sched/simple.c b/net/sched/simple.c
index 3ab4c675ab5d..8a6ae4f491e8 100644
--- a/net/sched/simple.c
+++ b/net/sched/simple.c
@@ -44,7 +44,7 @@ static DEFINE_RWLOCK(simp_lock);
#include <net/pkt_act.h>
#include <net/act_generic.h>
-static int tcf_simp(struct sk_buff **pskb, struct tc_action *a)
+static int tcf_simp(struct sk_buff **pskb, struct tc_action *a, struct tcf_result *res)
{
struct sk_buff *skb = *pskb;
struct tcf_defact *p = PRIV(a, defact);
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 742be9171b7d..28f32243397f 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -236,8 +236,8 @@ int sctp_rcv(struct sk_buff *skb)
}
/* SCTP seems to always need a timestamp right now (FIXME) */
- if (skb->stamp.tv_sec == 0) {
- do_gettimeofday(&skb->stamp);
+ if (skb->tstamp.off_sec == 0) {
+ __net_timestamp(skb);
sock_enable_timestamp(sk);
}
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index e9b2fd480d61..fa3be2b8fb5f 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -66,8 +66,8 @@
#include <linux/seq_file.h>
#include <net/protocol.h>
-#include <net/tcp.h>
#include <net/ndisc.h>
+#include <net/ip.h>
#include <net/ipv6.h>
#include <net/transp_v6.h>
#include <net/addrconf.h>
@@ -641,10 +641,7 @@ static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
else
newinet->pmtudisc = IP_PMTUDISC_WANT;
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet6_sock_nr);
- atomic_inc(&inet_sock_nr);
-#endif
+ sk_refcnt_debug_inc(newsk);
if (newsk->sk_prot->init(newsk)) {
sk_common_release(newsk);
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index ce9245e71fca..e7025be77691 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -62,7 +62,7 @@
/* Global data structures. */
struct sctp_globals sctp_globals;
struct proc_dir_entry *proc_net_sctp;
-DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
+DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;
struct idr sctp_assocs_id;
DEFINE_SPINLOCK(sctp_assocs_id_lock);
@@ -78,8 +78,8 @@ static struct sctp_pf *sctp_pf_inet_specific;
static struct sctp_af *sctp_af_v4_specific;
static struct sctp_af *sctp_af_v6_specific;
-kmem_cache_t *sctp_chunk_cachep;
-kmem_cache_t *sctp_bucket_cachep;
+kmem_cache_t *sctp_chunk_cachep __read_mostly;
+kmem_cache_t *sctp_bucket_cachep __read_mostly;
extern int sctp_snmp_proc_init(void);
extern int sctp_snmp_proc_exit(void);
@@ -593,9 +593,7 @@ static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
newinet->mc_index = 0;
newinet->mc_list = NULL;
-#ifdef INET_REFCNT_DEBUG
- atomic_inc(&inet_sock_nr);
-#endif
+ sk_refcnt_debug_inc(newsk);
if (newsk->sk_prot->init(newsk)) {
sk_common_release(newsk);
@@ -1244,6 +1242,10 @@ SCTP_STATIC __exit void sctp_exit(void)
module_init(sctp_init);
module_exit(sctp_exit);
+/*
+ * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly.
+ */
+MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
MODULE_LICENSE("GPL");
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 00d32b7c8266..3868a8d70cc0 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1362,6 +1362,7 @@ struct sctp_association *sctp_unpack_cookie(
char *key;
sctp_scope_t scope;
struct sk_buff *skb = chunk->skb;
+ struct timeval tv;
headersize = sizeof(sctp_chunkhdr_t) + SCTP_SECRET_SIZE;
bodysize = ntohs(chunk->chunk_hdr->length) - headersize;
@@ -1434,7 +1435,8 @@ no_hmac:
* an association, there is no need to check cookie's expiration
* for init collision case of lost COOKIE ACK.
*/
- if (!asoc && tv_lt(bear_cookie->expiration, skb->stamp)) {
+ skb_get_timestamp(skb, &tv);
+ if (!asoc && tv_lt(bear_cookie->expiration, tv)) {
__u16 len;
/*
* Section 3.3.10.3 Stale Cookie Error (3)
@@ -1447,10 +1449,9 @@ no_hmac:
len = ntohs(chunk->chunk_hdr->length);
*errp = sctp_make_op_error_space(asoc, chunk, len);
if (*errp) {
- suseconds_t usecs = (skb->stamp.tv_sec -
+ suseconds_t usecs = (tv.tv_sec -
bear_cookie->expiration.tv_sec) * 1000000L +
- skb->stamp.tv_usec -
- bear_cookie->expiration.tv_usec;
+ tv.tv_usec - bear_cookie->expiration.tv_usec;
usecs = htonl(usecs);
sctp_init_cause(*errp, SCTP_ERROR_STALE_COOKIE,
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 091a66f06a35..4454afe4727e 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4892,7 +4892,7 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
event = sctp_skb2event(skb);
if (event->asoc == assoc) {
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &oldsk->sk_receive_queue);
__skb_queue_tail(&newsk->sk_receive_queue, skb);
}
}
@@ -4921,7 +4921,7 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
event = sctp_skb2event(skb);
if (event->asoc == assoc) {
- __skb_unlink(skb, skb->list);
+ __skb_unlink(skb, &oldsp->pd_lobby);
__skb_queue_tail(queue, skb);
}
}
diff --git a/net/sctp/ulpqueue.c b/net/sctp/ulpqueue.c
index 8bbc279d6c99..ec2c857eae7f 100644
--- a/net/sctp/ulpqueue.c
+++ b/net/sctp/ulpqueue.c
@@ -50,9 +50,9 @@
/* Forward declarations for internal helpers. */
static struct sctp_ulpevent * sctp_ulpq_reasm(struct sctp_ulpq *ulpq,
- struct sctp_ulpevent *);
+ struct sctp_ulpevent *);
static struct sctp_ulpevent * sctp_ulpq_order(struct sctp_ulpq *,
- struct sctp_ulpevent *);
+ struct sctp_ulpevent *);
/* 1st Level Abstractions */
@@ -125,7 +125,9 @@ int sctp_ulpq_tail_data(struct sctp_ulpq *ulpq, struct sctp_chunk *chunk,
event = sctp_ulpq_order(ulpq, event);
}
- /* Send event to the ULP. */
+ /* Send event to the ULP. 'event' is the sctp_ulpevent for
+ * very first SKB on the 'temp' list.
+ */
if (event)
sctp_ulpq_tail_event(ulpq, event);
@@ -158,14 +160,18 @@ static int sctp_ulpq_clear_pd(struct sctp_ulpq *ulpq)
return sctp_clear_pd(ulpq->asoc->base.sk);
}
-
-
+/* If the SKB of 'event' is on a list, it is the first such member
+ * of that list.
+ */
int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
{
struct sock *sk = ulpq->asoc->base.sk;
- struct sk_buff_head *queue;
+ struct sk_buff_head *queue, *skb_list;
+ struct sk_buff *skb = sctp_event2skb(event);
int clear_pd = 0;
+ skb_list = (struct sk_buff_head *) skb->prev;
+
/* If the socket is just going to throw this away, do not
* even try to deliver it.
*/
@@ -197,10 +203,10 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
/* If we are harvesting multiple skbs they will be
* collected on a list.
*/
- if (sctp_event2skb(event)->list)
- sctp_skb_list_tail(sctp_event2skb(event)->list, queue);
+ if (skb_list)
+ sctp_skb_list_tail(skb_list, queue);
else
- __skb_queue_tail(queue, sctp_event2skb(event));
+ __skb_queue_tail(queue, skb);
/* Did we just complete partial delivery and need to get
* rolling again? Move pending data to the receive
@@ -214,10 +220,11 @@ int sctp_ulpq_tail_event(struct sctp_ulpq *ulpq, struct sctp_ulpevent *event)
return 1;
out_free:
- if (sctp_event2skb(event)->list)
- sctp_queue_purge_ulpevents(sctp_event2skb(event)->list);
+ if (skb_list)
+ sctp_queue_purge_ulpevents(skb_list);
else
sctp_ulpevent_free(event);
+
return 0;
}
@@ -269,7 +276,7 @@ static inline void sctp_ulpq_store_reasm(struct sctp_ulpq *ulpq,
* payload was fragmented on the way and ip had to reassemble them.
* We add the rest of skb's to the first skb's fraglist.
*/
-static struct sctp_ulpevent *sctp_make_reassembled_event(struct sk_buff *f_frag, struct sk_buff *l_frag)
+static struct sctp_ulpevent *sctp_make_reassembled_event(struct sk_buff_head *queue, struct sk_buff *f_frag, struct sk_buff *l_frag)
{
struct sk_buff *pos;
struct sctp_ulpevent *event;
@@ -294,7 +301,7 @@ static struct sctp_ulpevent *sctp_make_reassembled_event(struct sk_buff *f_frag,
skb_shinfo(f_frag)->frag_list = pos;
/* Remove the first fragment from the reassembly queue. */
- __skb_unlink(f_frag, f_frag->list);
+ __skb_unlink(f_frag, queue);
while (pos) {
pnext = pos->next;
@@ -304,7 +311,7 @@ static struct sctp_ulpevent *sctp_make_reassembled_event(struct sk_buff *f_frag,
f_frag->data_len += pos->len;
/* Remove the fragment from the reassembly queue. */
- __skb_unlink(pos, pos->list);
+ __skb_unlink(pos, queue);
/* Break if we have reached the last fragment. */
if (pos == l_frag)
@@ -375,7 +382,7 @@ static inline struct sctp_ulpevent *sctp_ulpq_retrieve_reassembled(struct sctp_u
done:
return retval;
found:
- retval = sctp_make_reassembled_event(first_frag, pos);
+ retval = sctp_make_reassembled_event(&ulpq->reasm, first_frag, pos);
if (retval)
retval->msg_flags |= MSG_EOR;
goto done;
@@ -435,7 +442,7 @@ static inline struct sctp_ulpevent *sctp_ulpq_retrieve_partial(struct sctp_ulpq
* further.
*/
done:
- retval = sctp_make_reassembled_event(first_frag, last_frag);
+ retval = sctp_make_reassembled_event(&ulpq->reasm, first_frag, last_frag);
if (retval && is_last)
retval->msg_flags |= MSG_EOR;
@@ -527,7 +534,7 @@ static inline struct sctp_ulpevent *sctp_ulpq_retrieve_first(struct sctp_ulpq *u
* further.
*/
done:
- retval = sctp_make_reassembled_event(first_frag, last_frag);
+ retval = sctp_make_reassembled_event(&ulpq->reasm, first_frag, last_frag);
return retval;
}
@@ -537,6 +544,7 @@ done:
static inline void sctp_ulpq_retrieve_ordered(struct sctp_ulpq *ulpq,
struct sctp_ulpevent *event)
{
+ struct sk_buff_head *event_list;
struct sk_buff *pos, *tmp;
struct sctp_ulpevent *cevent;
struct sctp_stream *in;
@@ -547,6 +555,8 @@ static inline void sctp_ulpq_retrieve_ordered(struct sctp_ulpq *ulpq,
ssn = event->ssn;
in = &ulpq->asoc->ssnmap->in;
+ event_list = (struct sk_buff_head *) sctp_event2skb(event)->prev;
+
/* We are holding the chunks by stream, by SSN. */
sctp_skb_for_each(pos, &ulpq->lobby, tmp) {
cevent = (struct sctp_ulpevent *) pos->cb;
@@ -567,10 +577,10 @@ static inline void sctp_ulpq_retrieve_ordered(struct sctp_ulpq *ulpq,
/* Found it, so mark in the ssnmap. */
sctp_ssn_next(in, sid);
- __skb_unlink(pos, pos->list);
+ __skb_unlink(pos, &ulpq->lobby);
/* Attach all gathered skbs to the event. */
- __skb_queue_tail(sctp_event2skb(event)->list, pos);
+ __skb_queue_tail(event_list, pos);
}
}
@@ -626,7 +636,7 @@ static inline void sctp_ulpq_store_ordered(struct sctp_ulpq *ulpq,
}
static struct sctp_ulpevent *sctp_ulpq_order(struct sctp_ulpq *ulpq,
- struct sctp_ulpevent *event)
+ struct sctp_ulpevent *event)
{
__u16 sid, ssn;
struct sctp_stream *in;
@@ -667,7 +677,7 @@ static inline void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq)
{
struct sk_buff *pos, *tmp;
struct sctp_ulpevent *cevent;
- struct sctp_ulpevent *event = NULL;
+ struct sctp_ulpevent *event;
struct sctp_stream *in;
struct sk_buff_head temp;
__u16 csid, cssn;
@@ -675,6 +685,8 @@ static inline void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq)
in = &ulpq->asoc->ssnmap->in;
/* We are holding the chunks by stream, by SSN. */
+ skb_queue_head_init(&temp);
+ event = NULL;
sctp_skb_for_each(pos, &ulpq->lobby, tmp) {
cevent = (struct sctp_ulpevent *) pos->cb;
csid = cevent->stream;
@@ -686,19 +698,20 @@ static inline void sctp_ulpq_reap_ordered(struct sctp_ulpq *ulpq)
/* Found it, so mark in the ssnmap. */
sctp_ssn_next(in, csid);
- __skb_unlink(pos, pos->list);
+ __skb_unlink(pos, &ulpq->lobby);
if (!event) {
/* Create a temporary list to collect chunks on. */
event = sctp_skb2event(pos);
- skb_queue_head_init(&temp);
__skb_queue_tail(&temp, sctp_event2skb(event));
} else {
/* Attach all gathered skbs to the event. */
- __skb_queue_tail(sctp_event2skb(event)->list, pos);
+ __skb_queue_tail(&temp, pos);
}
}
- /* Send event to the ULP. */
+ /* Send event to the ULP. 'event' is the sctp_ulpevent for
+ * very first SKB on the 'temp' list.
+ */
if (event)
sctp_ulpq_tail_event(ulpq, event);
}
diff --git a/net/socket.c b/net/socket.c
index 6f2a17881972..94fe638b4d72 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -70,6 +70,8 @@
#include <linux/seq_file.h>
#include <linux/wanrouter.h>
#include <linux/if_bridge.h>
+#include <linux/if_frad.h>
+#include <linux/if_vlan.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/cache.h>
@@ -272,7 +274,7 @@ int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ule
#define SOCKFS_MAGIC 0x534F434B
-static kmem_cache_t * sock_inode_cachep;
+static kmem_cache_t * sock_inode_cachep __read_mostly;
static struct inode *sock_alloc_inode(struct super_block *sb)
{
@@ -331,7 +333,7 @@ static struct super_block *sockfs_get_sb(struct file_system_type *fs_type,
return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC);
}
-static struct vfsmount *sock_mnt;
+static struct vfsmount *sock_mnt __read_mostly;
static struct file_system_type sock_fs_type = {
.name = "sockfs",
@@ -404,6 +406,7 @@ int sock_map_fd(struct socket *sock)
file->f_mode = FMODE_READ | FMODE_WRITE;
file->f_flags = O_RDWR;
file->f_pos = 0;
+ file->private_data = sock;
fd_install(fd, file);
}
@@ -436,6 +439,9 @@ struct socket *sockfd_lookup(int fd, int *err)
return NULL;
}
+ if (file->f_op == &socket_file_ops)
+ return file->private_data; /* set in sock_map_fd */
+
inode = file->f_dentry->d_inode;
if (!S_ISSOCK(inode->i_mode)) {
*err = -ENOTSOCK;
@@ -720,8 +726,8 @@ static ssize_t sock_aio_write(struct kiocb *iocb, const char __user *ubuf,
return __sock_sendmsg(iocb, sock, &x->async_msg, size);
}
-ssize_t sock_sendpage(struct file *file, struct page *page,
- int offset, size_t size, loff_t *ppos, int more)
+static ssize_t sock_sendpage(struct file *file, struct page *page,
+ int offset, size_t size, loff_t *ppos, int more)
{
struct socket *sock;
int flags;
@@ -944,7 +950,7 @@ static int sock_mmap(struct file * file, struct vm_area_struct * vma)
return sock->ops->mmap(file, sock, vma);
}
-int sock_close(struct inode *inode, struct file *filp)
+static int sock_close(struct inode *inode, struct file *filp)
{
/*
* It was possible the inode is NULL we were
@@ -2023,9 +2029,6 @@ int sock_unregister(int family)
return 0;
}
-
-extern void sk_init(void);
-
void __init sock_init(void)
{
/*
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 554f224c0445..fe1a73ce6cff 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -28,13 +28,13 @@
#include <linux/workqueue.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
-static struct vfsmount *rpc_mount;
+static struct vfsmount *rpc_mount __read_mostly;
static int rpc_mount_count;
static struct file_system_type rpc_pipe_fs_type;
-static kmem_cache_t *rpc_inode_cachep;
+static kmem_cache_t *rpc_inode_cachep __read_mostly;
#define RPC_UPCALL_TIMEOUT (30*HZ)
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 2d9eb7fbd521..f3104035e35d 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -34,10 +34,10 @@ static int rpc_task_id;
#define RPC_BUFFER_MAXSIZE (2048)
#define RPC_BUFFER_POOLSIZE (8)
#define RPC_TASK_POOLSIZE (8)
-static kmem_cache_t *rpc_task_slabp;
-static kmem_cache_t *rpc_buffer_slabp;
-static mempool_t *rpc_task_mempool;
-static mempool_t *rpc_buffer_mempool;
+static kmem_cache_t *rpc_task_slabp __read_mostly;
+static kmem_cache_t *rpc_buffer_slabp __read_mostly;
+static mempool_t *rpc_task_mempool __read_mostly;
+static mempool_t *rpc_buffer_mempool __read_mostly;
static void __rpc_default_timer(struct rpc_task *task);
static void rpciod_killall(void);
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index d0c3120d0233..05fe2e735538 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -34,7 +34,7 @@
#include <net/sock.h>
#include <net/checksum.h>
#include <net/ip.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/ioctls.h>
@@ -584,13 +584,16 @@ svc_udp_recvfrom(struct svc_rqst *rqstp)
/* possibly an icmp error */
dprintk("svc: recvfrom returned error %d\n", -err);
}
- if (skb->stamp.tv_sec == 0) {
- skb->stamp.tv_sec = xtime.tv_sec;
- skb->stamp.tv_usec = xtime.tv_nsec / NSEC_PER_USEC;
+ if (skb->tstamp.off_sec == 0) {
+ struct timeval tv;
+
+ tv.tv_sec = xtime.tv_sec;
+ tv.tv_usec = xtime.tv_nsec * 1000;
+ skb_set_timestamp(skb, &tv);
/* Don't enable netstamp, sunrpc doesn't
need that much accuracy */
}
- svsk->sk_sk->sk_stamp = skb->stamp;
+ skb_get_timestamp(skb, &svsk->sk_sk->sk_stamp);
set_bit(SK_DATA, &svsk->sk_flags); /* there may be more data... */
/*
diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index 3f6e31069c54..c5241fcbb966 100644
--- a/net/sysctl_net.c
+++ b/net/sysctl_net.c
@@ -17,17 +17,15 @@
#include <linux/sysctl.h>
#ifdef CONFIG_INET
-extern struct ctl_table ipv4_table[];
+#include <net/ip.h>
#endif
-extern struct ctl_table core_table[];
-
#ifdef CONFIG_NET
-extern struct ctl_table ether_table[];
+#include <linux/if_ether.h>
#endif
#ifdef CONFIG_TR
-extern struct ctl_table tr_table[];
+#include <linux/if_tr.h>
#endif
struct ctl_table net_table[] = {
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index d403e34088ad..41feca3bef86 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -105,7 +105,7 @@
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/sock.h>
-#include <linux/tcp.h>
+#include <net/tcp_states.h>
#include <net/af_unix.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
@@ -2026,14 +2026,6 @@ static struct net_proto_family unix_family_ops = {
.owner = THIS_MODULE,
};
-#ifdef CONFIG_SYSCTL
-extern void unix_sysctl_register(void);
-extern void unix_sysctl_unregister(void);
-#else
-static inline void unix_sysctl_register(void) {}
-static inline void unix_sysctl_unregister(void) {}
-#endif
-
static int __init af_unix_init(void)
{
int rc = -1;
diff --git a/net/unix/garbage.c b/net/unix/garbage.c
index 4bd95c8f5934..6ffc64e1712d 100644
--- a/net/unix/garbage.c
+++ b/net/unix/garbage.c
@@ -76,11 +76,11 @@
#include <linux/netdevice.h>
#include <linux/file.h>
#include <linux/proc_fs.h>
-#include <linux/tcp.h>
#include <net/sock.h>
#include <net/af_unix.h>
#include <net/scm.h>
+#include <net/tcp_states.h>
/* Internal data structures and random procedures: */
@@ -286,16 +286,16 @@ void unix_gc(void)
skb = skb_peek(&s->sk_receive_queue);
while (skb &&
skb != (struct sk_buff *)&s->sk_receive_queue) {
- nextsk=skb->next;
+ nextsk = skb->next;
/*
* Do we have file descriptors ?
*/
- if(UNIXCB(skb).fp)
- {
- __skb_unlink(skb, skb->list);
- __skb_queue_tail(&hitlist,skb);
+ if (UNIXCB(skb).fp) {
+ __skb_unlink(skb,
+ &s->sk_receive_queue);
+ __skb_queue_tail(&hitlist, skb);
}
- skb=nextsk;
+ skb = nextsk;
}
spin_unlock(&s->sk_receive_queue.lock);
}
diff --git a/net/unix/sysctl_net_unix.c b/net/unix/sysctl_net_unix.c
index c974dac4580a..690ffa5d5bfb 100644
--- a/net/unix/sysctl_net_unix.c
+++ b/net/unix/sysctl_net_unix.c
@@ -12,7 +12,7 @@
#include <linux/mm.h>
#include <linux/sysctl.h>
-extern int sysctl_unix_max_dgram_qlen;
+#include <net/af_unix.h>
static ctl_table unix_table[] = {
{
diff --git a/net/wanrouter/af_wanpipe.c b/net/wanrouter/af_wanpipe.c
index d93b19faaab7..596cb96e5f47 100644
--- a/net/wanrouter/af_wanpipe.c
+++ b/net/wanrouter/af_wanpipe.c
@@ -57,7 +57,7 @@
#include <linux/wanpipe.h>
#include <linux/if_wanpipe.h>
#include <linux/pkt_sched.h>
-#include <linux/tcp.h>
+#include <linux/tcp_states.h>
#include <linux/if_wanpipe_common.h>
#include <linux/sdla_x25.h>
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 04bec047fa9a..020d73cc8414 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -47,7 +47,7 @@
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <linux/fcntl.h>
#include <linux/termios.h> /* For TIOCINQ/OUTQ */
diff --git a/net/x25/x25_dev.c b/net/x25/x25_dev.c
index 36fc3bf6d882..adfe7b8df355 100644
--- a/net/x25/x25_dev.c
+++ b/net/x25/x25_dev.c
@@ -81,7 +81,7 @@ static int x25_receive_data(struct sk_buff *skb, struct x25_neigh *nb)
}
int x25_lapb_receive_frame(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype)
+ struct packet_type *ptype, struct net_device *orig_dev)
{
struct sk_buff *nskb;
struct x25_neigh *nb;
diff --git a/net/x25/x25_in.c b/net/x25/x25_in.c
index b0197c70a9fc..26146874b839 100644
--- a/net/x25/x25_in.c
+++ b/net/x25/x25_in.c
@@ -28,7 +28,7 @@
#include <linux/string.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/x25.h>
static int x25_queue_rx_frame(struct sock *sk, struct sk_buff *skb, int more)
diff --git a/net/x25/x25_subr.c b/net/x25/x25_subr.c
index 7fd872ad0c20..8be9b8fbc24d 100644
--- a/net/x25/x25_subr.c
+++ b/net/x25/x25_subr.c
@@ -27,7 +27,7 @@
#include <linux/string.h>
#include <linux/skbuff.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/x25.h>
/*
@@ -80,7 +80,7 @@ void x25_requeue_frames(struct sock *sk)
if (!skb_prev)
skb_queue_head(&sk->sk_write_queue, skb);
else
- skb_append(skb_prev, skb);
+ skb_append(skb_prev, skb, &sk->sk_write_queue);
skb_prev = skb;
}
}
diff --git a/net/x25/x25_timer.c b/net/x25/x25_timer.c
index d6a21a3ad80e..0a92e1da3922 100644
--- a/net/x25/x25_timer.c
+++ b/net/x25/x25_timer.c
@@ -23,7 +23,7 @@
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <net/sock.h>
-#include <net/tcp.h>
+#include <net/tcp_states.h>
#include <net/x25.h>
static void x25_heartbeat_expiry(unsigned long);
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index c58a6f05a0b6..2407a7072327 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -12,7 +12,7 @@
#include <net/ip.h>
#include <net/xfrm.h>
-static kmem_cache_t *secpath_cachep;
+static kmem_cache_t *secpath_cachep __read_mostly;
void __secpath_destroy(struct sec_path *sp)
{
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index d65ed8684fc1..83c8135e1764 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -37,7 +37,7 @@ EXPORT_SYMBOL(xfrm_policy_list);
static DEFINE_RWLOCK(xfrm_policy_afinfo_lock);
static struct xfrm_policy_afinfo *xfrm_policy_afinfo[NPROTO];
-static kmem_cache_t *xfrm_dst_cache;
+static kmem_cache_t *xfrm_dst_cache __read_mostly;
static struct work_struct xfrm_policy_gc_work;
static struct list_head xfrm_policy_gc_list =
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 8da3e25b2c4c..c35336a0f71b 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1125,9 +1125,8 @@ static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
if (build_expire(skb, x, c->data.hard) < 0)
BUG();
- NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE;
-
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_EXPIRE, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
}
static int xfrm_notify_sa_flush(struct km_event *c)
@@ -1152,7 +1151,8 @@ static int xfrm_notify_sa_flush(struct km_event *c)
nlh->nlmsg_len = skb->tail - b;
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_SA, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
nlmsg_failure:
kfree_skb(skb);
@@ -1226,7 +1226,8 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
nlh->nlmsg_len = skb->tail - b;
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_SA, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_SA;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
nlmsg_failure:
rtattr_failure:
@@ -1304,9 +1305,8 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
if (build_acquire(skb, x, xt, xp, dir) < 0)
BUG();
- NETLINK_CB(skb).dst_groups = XFRMGRP_ACQUIRE;
-
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_ACQUIRE, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
}
/* User gives us xfrm_user_policy_info followed by an array of 0
@@ -1405,9 +1405,8 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve
if (build_polexpire(skb, xp, dir, c->data.hard) < 0)
BUG();
- NETLINK_CB(skb).dst_groups = XFRMGRP_EXPIRE;
-
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_EXPIRE, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
}
static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
@@ -1455,7 +1454,8 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *
nlh->nlmsg_len = skb->tail - b;
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_POLICY, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
nlmsg_failure:
rtattr_failure:
@@ -1480,7 +1480,8 @@ static int xfrm_notify_policy_flush(struct km_event *c)
nlh->nlmsg_len = skb->tail - b;
- return netlink_broadcast(xfrm_nl, skb, 0, XFRMGRP_POLICY, GFP_ATOMIC);
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
nlmsg_failure:
kfree_skb(skb);
@@ -1519,7 +1520,8 @@ static int __init xfrm_user_init(void)
{
printk(KERN_INFO "Initializing IPsec netlink socket\n");
- xfrm_nl = netlink_kernel_create(NETLINK_XFRM, xfrm_netlink_rcv);
+ xfrm_nl = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX,
+ xfrm_netlink_rcv, THIS_MODULE);
if (xfrm_nl == NULL)
return -ENOMEM;
@@ -1537,3 +1539,4 @@ static void __exit xfrm_user_exit(void)
module_init(xfrm_user_init);
module_exit(xfrm_user_exit);
MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);