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authorStephen Hemminger <shemminger@linux-foundation.org>2007-04-26 01:07:58 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-26 01:30:02 -0400
commitc2886d6259b8faac4c05ffd9c3c401ac84478de0 (patch)
tree88bcce1789b029334f9a19db8e78f79d5f8fc808 /net/bridge/br_input.c
parent2111f8b9e58fd04b87b8b07d66485f255a57b0bb (diff)
[BRIDGE]: if no STP then forward all BPDUs
If a bridge is not running STP, then it has no way to detect a cycle in the network. But if it is not running STP and some other machine or device is running STP, then if STP BPDU's get forwarded to it can detect the cycle. This is how the old 2.4 and early 2.6 code worked. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_input.c')
-rw-r--r--net/bridge/br_input.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 5662567c8aed..420bbb9955e9 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -136,8 +136,14 @@ struct sk_buff *br_handle_frame(struct net_bridge_port *p, struct sk_buff *skb)
136 if (skb->protocol == htons(ETH_P_PAUSE)) 136 if (skb->protocol == htons(ETH_P_PAUSE))
137 goto drop; 137 goto drop;
138 138
139 return (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev, 139 /* Process STP BPDU's through normal netif_receive_skb() path */
140 NULL, br_handle_local_finish) == 0) ? skb : NULL; 140 if (p->br->stp_enabled != BR_NO_STP) {
141 if (NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,
142 NULL, br_handle_local_finish))
143 return NULL;
144 else
145 return skb;
146 }
141 } 147 }
142 148
143 switch (p->state) { 149 switch (p->state) {