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authorToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>2014-03-27 21:46:55 +0900
committerDavid S. Miller <davem@davemloft.net>2014-03-28 16:33:09 -0400
commit12464bb8de021a01fa7ec9299c273c247df7f198 (patch)
treec4fb3f4b93f4571483327501011be6668ceb3a76
parenta39ee449f96a2cd44ce056d8a0a112211a9b1a1f (diff)
downloadlinux-linaro-stable-12464bb8de021a01fa7ec9299c273c247df7f198.tar.gz
bridge: Fix inabillity to retrieve vlan tags when tx offload is disabled
Bridge vlan code (br_vlan_get_tag()) assumes that all frames have vlan_tci if they are tagged, but if vlan tx offload is manually disabled on bridge device and frames are sent from vlan device on the bridge device, the tags are embedded in skb->data and they break this assumption. Extract embedded vlan tags and move them to vlan_tci at ingress. 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_device.c6
-rw-r--r--net/bridge/br_vlan.c12
2 files changed, 15 insertions, 3 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 63f0455c0bc3..8fe8b71b487a 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -49,14 +49,14 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
brstats->tx_bytes += skb->len;
u64_stats_update_end(&brstats->syncp);
- if (!br_allowed_ingress(br, br_get_vlan_info(br), skb, &vid))
- goto out;
-
BR_INPUT_SKB_CB(skb)->brdev = dev;
skb_reset_mac_header(skb);
skb_pull(skb, ETH_HLEN);
+ if (!br_allowed_ingress(br, br_get_vlan_info(br), skb, &vid))
+ goto out;
+
if (is_broadcast_ether_addr(dest))
br_flood_deliver(br, skb, false);
else if (is_multicast_ether_addr(dest)) {
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 8249ca764c79..44f31af0b965 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -174,6 +174,18 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
if (!v)
return false;
+ /* If vlan tx offload is disabled on bridge device and frame was
+ * sent from vlan device on the bridge device, it does not have
+ * HW accelerated vlan tag.
+ */
+ if (unlikely(!vlan_tx_tag_present(skb) &&
+ (skb->protocol == htons(ETH_P_8021Q) ||
+ skb->protocol == htons(ETH_P_8021AD)))) {
+ skb = vlan_untag(skb);
+ if (unlikely(!skb))
+ return false;
+ }
+
err = br_vlan_get_tag(skb, vid);
if (!*vid) {
u16 pvid = br_get_pvid(v);