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authorEric Dumazet <edumazet@google.com>2014-04-15 21:47:15 +0400
committerDavid S. Miller <davem@davemloft.net>2014-04-15 21:47:15 +0400
commitaad88724c9d54acb1a9737cb6069d8470fa85f74 (patch)
tree78cc7b925f3d05338373898f018892b8f434a948 /net/core/dst.c
parentb0270e91014dabfceaf37f5b40ad51bbf21a1302 (diff)
downloadlinux-aad88724c9d54acb1a9737cb6069d8470fa85f74.tar.xz
ipv4: add a sock pointer to dst->output() path.
In the dst->output() path for ipv4, the code assumes the skb it has to transmit is attached to an inet socket, specifically via ip_mc_output() : The sk_mc_loop() test triggers a WARN_ON() when the provider of the packet is an AF_PACKET socket. The dst->output() method gets an additional 'struct sock *sk' parameter. This needs a cascade of changes so that this parameter can be propagated from vxlan to final consumer. Fixes: 8f646c922d55 ("vxlan: keep original skb ownership") Reported-by: lucien xin <lucien.xin@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dst.c')
-rw-r--r--net/core/dst.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/net/core/dst.c b/net/core/dst.c
index ca4231ec7347..80d6286c8b62 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -142,12 +142,12 @@ loop:
mutex_unlock(&dst_gc_mutex);
}
-int dst_discard(struct sk_buff *skb)
+int dst_discard_sk(struct sock *sk, struct sk_buff *skb)
{
kfree_skb(skb);
return 0;
}
-EXPORT_SYMBOL(dst_discard);
+EXPORT_SYMBOL(dst_discard_sk);
const u32 dst_default_metrics[RTAX_MAX + 1] = {
/* This initializer is needed to force linker to place this variable
@@ -184,7 +184,7 @@ void *dst_alloc(struct dst_ops *ops, struct net_device *dev,
dst->xfrm = NULL;
#endif
dst->input = dst_discard;
- dst->output = dst_discard;
+ dst->output = dst_discard_sk;
dst->error = 0;
dst->obsolete = initial_obsolete;
dst->header_len = 0;
@@ -209,8 +209,10 @@ static void ___dst_free(struct dst_entry *dst)
/* The first case (dev==NULL) is required, when
protocol module is unloaded.
*/
- if (dst->dev == NULL || !(dst->dev->flags&IFF_UP))
- dst->input = dst->output = dst_discard;
+ if (dst->dev == NULL || !(dst->dev->flags&IFF_UP)) {
+ dst->input = dst_discard;
+ dst->output = dst_discard_sk;
+ }
dst->obsolete = DST_OBSOLETE_DEAD;
}
@@ -361,7 +363,8 @@ static void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
return;
if (!unregister) {
- dst->input = dst->output = dst_discard;
+ dst->input = dst_discard;
+ dst->output = dst_discard_sk;
} else {
dst->dev = dev_net(dst->dev)->loopback_dev;
dev_hold(dst->dev);