[PATCH 2/13] bridge: Allow tail-call on br_pass_frame_up
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2010-02-26 15:35:09
Subsystem:
ethernet bridge, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <herbert@gondor.apana.org.au> --- net/bridge/br_input.c | 12 +++++++----- net/bridge/br_private.h | 6 ++++++ 2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 9589937..be5ab8d 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 2114e45..a38d738 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h@@ -132,6 +132,12 @@ 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];