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authorDavid S. Miller <davem@davemloft.net>2012-07-03 09:15:37 +0400
committerDavid S. Miller <davem@davemloft.net>2012-07-05 12:12:00 +0400
commit13a43d94ab026c423dc8902170ef27c2bd36aa87 (patch)
tree3dce5cdca10a4f21b5e7c9815c7aee295b4123a2 /net/core/neighbour.c
parentf9d751667fd60788fe3641738938e0968e99cece (diff)
downloadlinux-13a43d94ab026c423dc8902170ef27c2bd36aa87.tar.xz
neigh: Convert over to dst_neigh_lookup_skb().
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/neighbour.c')
-rw-r--r--net/core/neighbour.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index a793af9af150..117afaf51268 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1201,10 +1201,23 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
write_unlock_bh(&neigh->lock);
rcu_read_lock();
- /* On shaper/eql skb->dst->neighbour != neigh :( */
- if (dst && (n2 = dst_get_neighbour_noref(dst)) != NULL)
- n1 = n2;
+
+ /* Why not just use 'neigh' as-is? The problem is that
+ * things such as shaper, eql, and sch_teql can end up
+ * using alternative, different, neigh objects to output
+ * the packet in the output path. So what we need to do
+ * here is re-lookup the top-level neigh in the path so
+ * we can reinject the packet there.
+ */
+ n2 = NULL;
+ if (dst) {
+ n2 = dst_neigh_lookup_skb(dst, skb);
+ if (n2)
+ n1 = n2;
+ }
n1->output(n1, skb);
+ if (n2)
+ neigh_release(n2);
rcu_read_unlock();
write_lock_bh(&neigh->lock);