From b35c5f632b630183396a2ea2e2247ff8bbf2c94f Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Thu, 14 Jul 2016 06:10:01 +0300 Subject: net: bridge: drop skb2/skb0 variables and use a local_rcv boolean Currently if the packet is going to be received locally we set skb0 or sometimes called skb2 variables to the original skb. This can get confusing and also we can avoid one conditional on the fast path by simply using a boolean and passing it around. Thanks to Roopa for the name suggestion. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/bridge/br_input.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) (limited to 'net/bridge/br_input.c') diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index c20c5be6fc22..dd8885def11b 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -131,13 +131,12 @@ static void br_do_proxy_arp(struct sk_buff *skb, struct net_bridge *br, /* note: already called with rcu_read_lock */ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb) { + bool local_rcv = false, mcast_hit = false, unicast = true; struct net_bridge_port *p = br_port_get_rcu(skb->dev); const unsigned char *dest = eth_hdr(skb)->h_dest; struct net_bridge_fdb_entry *dst = NULL; - bool mcast_hit = false, unicast = true; struct net_bridge_mdb_entry *mdst; struct net_bridge *br; - struct sk_buff *skb2; u16 vid = 0; if (!p || p->state == BR_STATE_DISABLED) @@ -160,17 +159,13 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb BR_INPUT_SKB_CB(skb)->brdev = br->dev; - /* The packet skb2 goes to the local host (NULL to skip). */ - skb2 = NULL; - - if (br->dev->flags & IFF_PROMISC) - skb2 = skb; + local_rcv = !!(br->dev->flags & IFF_PROMISC); if (IS_ENABLED(CONFIG_INET) && skb->protocol == htons(ETH_P_ARP)) br_do_proxy_arp(skb, br, vid, p); if (is_broadcast_ether_addr(dest)) { - skb2 = skb; + local_rcv = true; unicast = false; } else if (is_multicast_ether_addr(dest)) { mdst = br_mdb_get(br, skb, vid); @@ -178,12 +173,12 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb br_multicast_querier_exists(br, eth_hdr(skb))) { if ((mdst && mdst->mglist) || br_multicast_is_router(br)) { - skb2 = skb; + local_rcv = true; br->dev->stats.multicast++; } mcast_hit = true; } else { - skb2 = skb; + local_rcv = true; br->dev->stats.multicast++; } unicast = false; @@ -194,16 +189,16 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb if (dst) { dst->used = jiffies; - br_forward(dst->dst, skb, skb2); + br_forward(dst->dst, skb, local_rcv); } else { if (!mcast_hit) - br_flood_forward(br, skb, skb2, unicast); + br_flood_forward(br, skb, local_rcv, unicast); else - br_multicast_forward(mdst, skb, skb2); + br_multicast_forward(mdst, skb, local_rcv); } - if (skb2) - return br_pass_frame_up(skb2); + if (local_rcv) + return br_pass_frame_up(skb); out: return 0; -- cgit v1.2.3