From 70e4272b4c81828e7d942209bae83b9d92752cfe Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Sat, 24 Nov 2018 04:34:21 +0200 Subject: net: bridge: add no_linklocal_learn bool option Use the new boolopt API to add an option which disables learning from link-local packets. The default is kept as before and learning is enabled. This is a simple map from a boolopt bit to a bridge private flag that is tested before learning. v2: pass NULL for extack via sysfs Signed-off-by: Nikolay Aleksandrov Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- net/bridge/br_input.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'net/bridge/br_input.c') diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 3ddca11f44c2..5ea7e56119c1 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -188,7 +188,9 @@ static void __br_handle_local_finish(struct sk_buff *skb) u16 vid = 0; /* check if vlan is allowed, to avoid spoofing */ - if (p->flags & BR_LEARNING && br_should_learn(p, skb, &vid)) + if ((p->flags & BR_LEARNING) && + !br_opt_get(p->br, BROPT_NO_LL_LEARN) && + br_should_learn(p, skb, &vid)) br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid, false); } -- cgit v1.2.1