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| author | Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> | 2014-03-27 21:46:56 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-28 16:33:09 -0400 |
| commit | 99b192da9c99284ad3374132e56f66995cadc6b4 (patch) | |
| tree | 5d76b7b88909e15e5126fb250b3ad03d6ecb0d15 | |
| parent | 12464bb8de021a01fa7ec9299c273c247df7f198 (diff) | |
| download | linux-stable-99b192da9c99284ad3374132e56f66995cadc6b4.tar.gz linux-stable-99b192da9c99284ad3374132e56f66995cadc6b4.tar.bz2 linux-stable-99b192da9c99284ad3374132e56f66995cadc6b4.zip | |
bridge: Fix handling stacked vlan tags
If a bridge with vlan_filtering enabled receives frames with stacked
vlan tags, i.e., they have two vlan tags, br_vlan_untag() strips not
only the outer tag but also the inner tag.
br_vlan_untag() is called only from br_handle_vlan(), and in this case,
it is enough to set skb->vlan_tci to 0 here, because vlan_tci has already
been set before calling br_handle_vlan().
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/bridge/br_vlan.c | 18 |
1 files changed, 1 insertions, 17 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 44f31af0b965..c77eed56b045 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -119,22 +119,6 @@ static void __vlan_flush(struct net_port_vlans *v) kfree_rcu(v, rcu); } -/* Strip the tag from the packet. Will return skb with tci set 0. */ -static struct sk_buff *br_vlan_untag(struct sk_buff *skb) -{ - if (skb->protocol != htons(ETH_P_8021Q)) { - skb->vlan_tci = 0; - return skb; - } - - skb->vlan_tci = 0; - skb = vlan_untag(skb); - if (skb) - skb->vlan_tci = 0; - - return skb; -} - struct sk_buff *br_handle_vlan(struct net_bridge *br, const struct net_port_vlans *pv, struct sk_buff *skb) @@ -150,7 +134,7 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br, */ br_vlan_get_tag(skb, &vid); if (test_bit(vid, pv->untagged_bitmap)) - skb = br_vlan_untag(skb); + skb->vlan_tci = 0; out: return skb; |