netfilter: Pass net into okfn

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>

1 files changed, 6 insertions, 6 deletions

diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index c21f1a02ce13..61ba99f61dc8 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -19,7 +19,7 @@
 #include <net/dst.h>
 #include <net/xfrm.h>
 
-static int xfrm_output2(struct sock *sk, struct sk_buff *skb);
+static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb);
 
 static int xfrm_skb_check_space(struct sk_buff *skb)
 {
@@ -157,12 +157,12 @@ out:
 }
 EXPORT_SYMBOL_GPL(xfrm_output_resume);
 
-static int xfrm_output2(struct sock *sk, struct sk_buff *skb)
+static int xfrm_output2(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
         return xfrm_output_resume(skb, 1);
 }
 
-static int xfrm_output_gso(struct sock *sk, struct sk_buff *skb)
+static int xfrm_output_gso(struct net *net, struct sock *sk, struct sk_buff *skb)
 {
         struct sk_buff *segs;
 
@@ -178,7 +178,7 @@ static int xfrm_output_gso(struct sock *sk, struct sk_buff *skb)
                 int err;
 
                 segs->next = NULL;
-                err = xfrm_output2(sk, segs);
+                err = xfrm_output2(net, sk, segs);
 
                 if (unlikely(err)) {
                         kfree_skb_list(nskb);
@@ -197,7 +197,7 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
         int err;
 
         if (skb_is_gso(skb))
-                return xfrm_output_gso(sk, skb);
+                return xfrm_output_gso(net, sk, skb);
 
         if (skb->ip_summed == CHECKSUM_PARTIAL) {
                 err = skb_checksum_help(skb);
@@ -208,7 +208,7 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
                 }
         }
 
-        return xfrm_output2(sk, skb);
+        return xfrm_output2(net, sk, skb);
 }
 EXPORT_SYMBOL_GPL(xfrm_output);