From 5d1fcaf35d74b4188d238e46f0be37c14a01f169 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Mon, 4 Nov 2019 11:36:51 +0200 Subject: net: bridge: fdb: eliminate extra port state tests from fast-path When commit df1c0b8468b3 ("[BRIDGE]: Packets leaking out of disabled/blocked ports.") introduced the port state tests in br_fdb_update() it was to avoid learning/refreshing from STP BPDUs, it was also used to avoid learning/refreshing from user-space with NTF_USE. Those two tests are done for every packet entering the bridge if it's learning, but for the fast-path we already have them checked in br_handle_frame() and is unnecessary to do it again. Thus push the checks to the unlikely cases and drop them from br_fdb_update(), the new nbp_state_should_learn() helper is used to determine if the port state allows br_fdb_update() to be called. The two places which need to do it manually are: - user-space add call with NTF_USE set - link-local packet learning done in __br_handle_local_finish() Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/bridge/br_private.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/bridge/br_private.h') diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 08742bff9bf0..36b0367ca1e0 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -500,6 +500,11 @@ static inline bool br_vlan_should_use(const struct net_bridge_vlan *v) return true; } +static inline bool nbp_state_should_learn(const struct net_bridge_port *p) +{ + return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING; +} + static inline int br_opt_get(const struct net_bridge *br, enum net_bridge_opts opt) { -- cgit v1.2.3-59-g8ed1b