From 68b7c895be336b19f4c38d7cb500132fabba0afd Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sat, 27 Feb 2010 19:41:40 +0000 Subject: bridge: Allow tail-call on br_pass_frame_up This patch allows tail-call on the call to br_pass_frame_up in br_handle_frame_finish. This is now possible because of the previous patch to call br_pass_frame_up last. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/bridge/br_input.c | 12 +++++++----- net/bridge/br_private.h | 6 ++++++ 2 files changed, 13 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 9589937e1c0a..be5ab8df6661 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -20,9 +20,9 @@ /* Bridge group multicast address 802.1d (pg 51). */ const u8 br_group_address[ETH_ALEN] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 }; -static void br_pass_frame_up(struct net_bridge *br, struct sk_buff *skb) +static int br_pass_frame_up(struct sk_buff *skb) { - struct net_device *indev, *brdev = br->dev; + struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev; brdev->stats.rx_packets++; brdev->stats.rx_bytes += skb->len; @@ -30,8 +30,8 @@ static void br_pass_frame_up(struct net_bridge *br, struct sk_buff *skb) indev = skb->dev; skb->dev = brdev; - NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL, - netif_receive_skb); + return NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL, + netif_receive_skb); } /* note: already called with rcu_read_lock (preempt_disabled) */ @@ -53,6 +53,8 @@ int br_handle_frame_finish(struct sk_buff *skb) if (p->state == BR_STATE_LEARNING) goto drop; + BR_INPUT_SKB_CB(skb)->brdev = br->dev; + /* The packet skb2 goes to the local host (NULL to skip). */ skb2 = NULL; @@ -81,7 +83,7 @@ int br_handle_frame_finish(struct sk_buff *skb) } if (skb2) - br_pass_frame_up(br, skb2); + return br_pass_frame_up(skb2); out: return 0; diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 1f0c4f44b765..16513793156e 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -131,6 +131,12 @@ struct net_bridge struct kobject *ifobj; }; +struct br_input_skb_cb { + struct net_device *brdev; +}; + +#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb) + extern struct notifier_block br_device_notifier; extern const u8 br_group_address[ETH_ALEN]; -- cgit v1.2.3