diff options
| -rw-r--r-- | net/tipc/bcast.c | 4 | ||||
| -rw-r--r-- | net/tipc/bearer.c | 64 | ||||
| -rw-r--r-- | net/tipc/bearer.h | 10 | ||||
| -rw-r--r-- | net/tipc/core.c | 5 | ||||
| -rw-r--r-- | net/tipc/core.h | 3 | ||||
| -rw-r--r-- | net/tipc/node.c | 1 | ||||
| -rw-r--r-- | net/tipc/topsrv.c | 2 |
7 files changed, 88 insertions, 1 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 1336f3cdad38..34f3e5641438 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -406,8 +406,10 @@ int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, rc = tipc_bcast_xmit(net, pkts, cong_link_cnt); } - if (dests->local) + if (dests->local) { + tipc_loopback_trace(net, &localq); tipc_sk_mcast_rcv(net, &localq, &inputq); + } exit: /* This queue should normally be empty by now */ __skb_queue_purge(pkts); diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index a809c0ec8d15..0214aa1c4427 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -389,6 +389,11 @@ int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b, dev_put(dev); return -EINVAL; } + if (dev == net->loopback_dev) { + dev_put(dev); + pr_info("Enabling <%s> not permitted\n", b->name); + return -EINVAL; + } /* Autoconfigure own node identity if needed */ if (!tipc_own_id(net) && hwaddr_len <= NODE_ID_LEN) { @@ -674,6 +679,65 @@ void tipc_bearer_stop(struct net *net) } } +void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts) +{ + struct net_device *dev = net->loopback_dev; + struct sk_buff *skb, *_skb; + int exp; + + skb_queue_walk(pkts, _skb) { + skb = pskb_copy(_skb, GFP_ATOMIC); + if (!skb) + continue; + + exp = SKB_DATA_ALIGN(dev->hard_header_len - skb_headroom(skb)); + if (exp > 0 && pskb_expand_head(skb, exp, 0, GFP_ATOMIC)) { + kfree_skb(skb); + continue; + } + + skb_reset_network_header(skb); + dev_hard_header(skb, dev, ETH_P_TIPC, dev->dev_addr, + dev->dev_addr, skb->len); + skb->dev = dev; + skb->pkt_type = PACKET_HOST; + skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->protocol = eth_type_trans(skb, dev); + netif_rx_ni(skb); + } +} + +static int tipc_loopback_rcv_pkt(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt, struct net_device *od) +{ + consume_skb(skb); + return NET_RX_SUCCESS; +} + +int tipc_attach_loopback(struct net *net) +{ + struct net_device *dev = net->loopback_dev; + struct tipc_net *tn = tipc_net(net); + + if (!dev) + return -ENODEV; + + dev_hold(dev); + tn->loopback_pt.dev = dev; + tn->loopback_pt.type = htons(ETH_P_TIPC); + tn->loopback_pt.func = tipc_loopback_rcv_pkt; + dev_add_pack(&tn->loopback_pt); + return 0; +} + +void tipc_detach_loopback(struct net *net) +{ + struct tipc_net *tn = tipc_net(net); + + dev_remove_pack(&tn->loopback_pt); + dev_put(net->loopback_dev); +} + /* Caller should hold rtnl_lock to protect the bearer */ static int __tipc_nl_add_bearer(struct tipc_nl_msg *msg, struct tipc_bearer *bearer, int nlflags) diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index 7f4c569594a5..ea0f3c49cbed 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -232,6 +232,16 @@ void tipc_bearer_xmit(struct net *net, u32 bearer_id, struct tipc_media_addr *dst); void tipc_bearer_bc_xmit(struct net *net, u32 bearer_id, struct sk_buff_head *xmitq); +void tipc_clone_to_loopback(struct net *net, struct sk_buff_head *pkts); +int tipc_attach_loopback(struct net *net); +void tipc_detach_loopback(struct net *net); + +static inline void tipc_loopback_trace(struct net *net, + struct sk_buff_head *pkts) +{ + if (unlikely(dev_nit_active(net->loopback_dev))) + tipc_clone_to_loopback(net, pkts); +} /* check if device MTU is too low for tipc headers */ static inline bool tipc_mtu_bad(struct net_device *dev, unsigned int reserve) diff --git a/net/tipc/core.c b/net/tipc/core.c index c8370722f0bb..23cb379a93d6 100644 --- a/net/tipc/core.c +++ b/net/tipc/core.c @@ -82,6 +82,10 @@ static int __net_init tipc_init_net(struct net *net) if (err) goto out_bclink; + err = tipc_attach_loopback(net); + if (err) + goto out_bclink; + return 0; out_bclink: @@ -94,6 +98,7 @@ out_sk_rht: static void __net_exit tipc_exit_net(struct net *net) { + tipc_detach_loopback(net); tipc_net_stop(net); tipc_bcast_stop(net); tipc_nametbl_stop(net); diff --git a/net/tipc/core.h b/net/tipc/core.h index 7a68e1b6a066..60d829581068 100644 --- a/net/tipc/core.h +++ b/net/tipc/core.h @@ -125,6 +125,9 @@ struct tipc_net { /* Cluster capabilities */ u16 capabilities; + + /* Tracing of node internal messages */ + struct packet_type loopback_pt; }; static inline struct tipc_net *tipc_net(struct net *net) diff --git a/net/tipc/node.c b/net/tipc/node.c index 7ca019001f7c..1bdcf0fc1a4d 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -1443,6 +1443,7 @@ int tipc_node_xmit(struct net *net, struct sk_buff_head *list, int rc; if (in_own_node(net, dnode)) { + tipc_loopback_trace(net, list); tipc_sk_rcv(net, list); return 0; } diff --git a/net/tipc/topsrv.c b/net/tipc/topsrv.c index ca8ac96d22a9..3a12fc18239b 100644 --- a/net/tipc/topsrv.c +++ b/net/tipc/topsrv.c @@ -40,6 +40,7 @@ #include "socket.h" #include "addr.h" #include "msg.h" +#include "bearer.h" #include <net/sock.h> #include <linux/module.h> @@ -608,6 +609,7 @@ static void tipc_topsrv_kern_evt(struct net *net, struct tipc_event *evt) memcpy(msg_data(buf_msg(skb)), evt, sizeof(*evt)); skb_queue_head_init(&evtq); __skb_queue_tail(&evtq, skb); + tipc_loopback_trace(net, &evtq); tipc_sk_rcv(net, &evtq); } |