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netfilter: Pass net into okfn

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This is immediately motivated by the bridge code that chains functions that
call into netfilter.  Without passing net into the okfns the bridge code would
need to guess about the best expression for the network namespace to process
packets in.

As net is frequently one of the first things computed in continuation functions
after netfilter has done it's job passing in the desired network namespace is in
many cases a code simplification.

To support this change the function dst_output_okfn is introduced to
simplify passing dst_output as an okfn.  For the moment dst_output_okfn
just silently drops the struct net.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2015-09-15 20:04:18 -05:00 • committed by David S. Miller
parent 9dff2c966a
commit 0c4b51f005
37 changed files with 95 additions and 94 deletions
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7
net/ipv4/ip_input.c
View file

@ -188,10 +188,8 @@ bool ip_call_ra_chain(struct sk_buff *skb)
return false;
}
static int ip_local_deliver_finish(struct sock *sk, struct sk_buff *skb)
static int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
__skb_pull(skb, skb_network_header_len(skb));
rcu_read_lock();
@ -311,10 +309,9 @@ drop:
int sysctl_ip_early_demux __read_mostly = 1;
EXPORT_SYMBOL(sysctl_ip_early_demux);
static int ip_rcv_finish(struct sock *sk, struct sk_buff *skb)
static int ip_rcv_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
const struct iphdr *iph = ip_hdr(skb);
struct net *net = dev_net(skb->dev);
struct rtable *rt;
if (sysctl_ip_early_demux && !skb_dst(skb) && !skb->sk) {