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authorEric W. Biederman <ebiederm@xmission.com>2015-10-09 13:44:54 -0500
committerDavid S. Miller <davem@davemloft.net>2015-10-12 19:44:16 -0700
commit19bcf9f203c82c2028f5a0881b1f0690e3207190 (patch)
treea3d9cbc354d0c464f8485b298f25bab4bae7a73b /net/ipv4
parent37fcbab61b8ecf75cb5fd81e5809b71c270f9632 (diff)
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ipv4: Pass struct net into ip_defrag and ip_check_defrag
The function ip_defrag is called on both the input and the output paths of the networking stack. In particular conntrack when it is tracking outbound packets from the local machine calls ip_defrag. So add a struct net parameter and stop making ip_defrag guess which network namespace it needs to defragment packets in. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/ip_fragment.c7
-rw-r--r--net/ipv4/ip_input.c7
-rw-r--r--net/ipv4/netfilter/nf_defrag_ipv4.c7
3 files changed, 11 insertions, 10 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 9772b789adf3..5482745d5d68 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -654,11 +654,10 @@ out_fail:
}
/* Process an incoming IP datagram fragment. */
-int ip_defrag(struct sk_buff *skb, u32 user)
+int ip_defrag(struct net *net, struct sk_buff *skb, u32 user)
{
struct net_device *dev = skb->dev ? : skb_dst(skb)->dev;
int vif = l3mdev_master_ifindex_rcu(dev);
- struct net *net = dev_net(dev);
struct ipq *qp;
IP_INC_STATS_BH(net, IPSTATS_MIB_REASMREQDS);
@@ -683,7 +682,7 @@ int ip_defrag(struct sk_buff *skb, u32 user)
}
EXPORT_SYMBOL(ip_defrag);
-struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
+struct sk_buff *ip_check_defrag(struct net *net, struct sk_buff *skb, u32 user)
{
struct iphdr iph;
int netoff;
@@ -712,7 +711,7 @@ struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
if (pskb_trim_rcsum(skb, netoff + len))
return skb;
memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
- if (ip_defrag(skb, user))
+ if (ip_defrag(net, skb, user))
return NULL;
skb_clear_hash(skb);
}
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 804b86fd615f..b1209b63381f 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -170,7 +170,7 @@ bool ip_call_ra_chain(struct sk_buff *skb)
sk->sk_bound_dev_if == dev->ifindex) &&
net_eq(sock_net(sk), net)) {
if (ip_is_fragment(ip_hdr(skb))) {
- if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN))
+ if (ip_defrag(net, skb, IP_DEFRAG_CALL_RA_CHAIN))
return true;
}
if (last) {
@@ -247,14 +247,15 @@ int ip_local_deliver(struct sk_buff *skb)
/*
* Reassemble IP fragments.
*/
+ struct net *net = dev_net(skb->dev);
if (ip_is_fragment(ip_hdr(skb))) {
- if (ip_defrag(skb, IP_DEFRAG_LOCAL_DELIVER))
+ if (ip_defrag(net, skb, IP_DEFRAG_LOCAL_DELIVER))
return 0;
}
return NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_IN,
- dev_net(skb->dev), NULL, skb, skb->dev, NULL,
+ net, NULL, skb, skb->dev, NULL,
ip_local_deliver_finish);
}
diff --git a/net/ipv4/netfilter/nf_defrag_ipv4.c b/net/ipv4/netfilter/nf_defrag_ipv4.c
index b246346ee849..bf25f45b23d2 100644
--- a/net/ipv4/netfilter/nf_defrag_ipv4.c
+++ b/net/ipv4/netfilter/nf_defrag_ipv4.c
@@ -22,14 +22,15 @@
#endif
#include <net/netfilter/nf_conntrack_zones.h>
-static int nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user)
+static int nf_ct_ipv4_gather_frags(struct net *net, struct sk_buff *skb,
+ u_int32_t user)
{
int err;
skb_orphan(skb);
local_bh_disable();
- err = ip_defrag(skb, user);
+ err = ip_defrag(net, skb, user);
local_bh_enable();
if (!err) {
@@ -85,7 +86,7 @@ static unsigned int ipv4_conntrack_defrag(void *priv,
enum ip_defrag_users user =
nf_ct_defrag_user(state->hook, skb);
- if (nf_ct_ipv4_gather_frags(skb, user))
+ if (nf_ct_ipv4_gather_frags(state->net, skb, user))
return NF_STOLEN;
}
return NF_ACCEPT;