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ipv4: Pass struct net into ip_defrag and ip_check_defrag

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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" <[email protected]>
Acked-by: Pablo Neira Ayuso <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric W. Biederman 2015-10-09 13:44:54 -05:00 • committed by David S. Miller
commit 19bcf9f203
8 changed files with 20 additions and 19 deletions
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6
net/packet/af_packet.c
View file

@ -1439,17 +1439,17 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev,
{
struct packet_fanout *f = pt->af_packet_priv;
unsigned int num = READ_ONCE(f->num_members);
struct net *net = read_pnet(&f->net);
struct packet_sock *po;
unsigned int idx;
if (!net_eq(dev_net(dev), read_pnet(&f->net)) ||
!num) {
if (!net_eq(dev_net(dev), net) || !num) {
kfree_skb(skb);
return 0;
}
if (fanout_has_flag(f, PACKET_FANOUT_FLAG_DEFRAG)) {
skb = ip_check_defrag(skb, IP_DEFRAG_AF_PACKET);
skb = ip_check_defrag(net, skb, IP_DEFRAG_AF_PACKET);
if (!skb)
return 0;
}