diff options
| author |   Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> | 2014-01-22 09:29:37 +0900 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-01-22 21:29:27 -0800 |
| commit | bdf4351bbc62f3b24151cf19ca6e531b68d8c340 (patch) | |
| tree | 9c85179f27fe9b46de73ea24d5aa6daee3826c69 /net/bridge | |
| parent | tcp: metrics: Fix rcu-race when deleting multiple entries (diff) | |
| download | linux-dev-bdf4351bbc62f3b24151cf19ca6e531b68d8c340.tar.xz linux-dev-bdf4351bbc62f3b24151cf19ca6e531b68d8c340.zip | |
bridge: Remove unnecessary vlan_put_tag in br_handle_vlan
br_handle_vlan() pushes HW accelerated vlan tag into skbuff when outgoing
port is the bridge device.
This is unnecessary because __netif_receive_skb_core() can handle skbs
with HW accelerated vlan tag. In current implementation,
__netif_receive_skb_core() needs to extract the vlan tag embedded in skb
data. This could cause low network performance especially when receiving
frames at a high frame rate on the bridge device.
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>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/br_vlan.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 7ffc801467ec..4ca4d0a0151c 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -151,27 +151,6 @@ 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); - else { - /* Egress policy says "send tagged". If output device - * is the bridge, we need to add the VLAN header - * ourselves since we'll be going through the RX path. - * Sending to ports puts the frame on the TX path and - * we let dev_hard_start_xmit() add the header. - */ - if (skb->protocol != htons(ETH_P_8021Q) && - pv->port_idx == 0) { - /* vlan_put_tag expects skb->data to point to - * mac header. - */ - skb_push(skb, ETH_HLEN); - skb = __vlan_put_tag(skb, skb->vlan_proto, skb->vlan_tci); - if (!skb) - goto out; - /* put skb->data back to where it was */ - skb_pull(skb, ETH_HLEN); - skb->vlan_tci = 0; - } - } out: return skb; |