From 6b26b51b1d13c62a09f55d745b06a8e964900715 Mon Sep 17 00:00:00 2001 From: Arkadi Sharshevsky Date: Thu, 8 Jun 2017 08:44:14 +0200 Subject: net: bridge: Add support for notifying devices about FDB add/del Currently the bridge doesn't notify the underlying devices about new FDBs learned. The FDB sync is placed on the switchdev notifier chain because devices may potentially learn FDB that are not directly related to their ports, for example: 1. Mixed SW/HW bridge - FDBs that point to the ASICs external devices should be offloaded as CPU traps in order to perform forwarding in slow path. 2. EVPN - Externally learned FDBs for the vtep device. Notification is sent only about static FDB add/del. This is done due to fact that currently this is the only scenario supported by switch drivers. Signed-off-by: Arkadi Sharshevsky Reviewed-by: Ido Schimmel Signed-off-by: Jiri Pirko Reviewed-by: Nikolay Aleksandrov Reviewed-by: Ivan Vecera Signed-off-by: David S. Miller --- net/bridge/br_switchdev.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'net/bridge/br_switchdev.c') diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index b975959ac15a..181a44d0f1da 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -98,3 +98,36 @@ int br_switchdev_set_port_flag(struct net_bridge_port *p, return 0; } + +static void +br_switchdev_fdb_call_notifiers(bool adding, const unsigned char *mac, + u16 vid, struct net_device *dev) +{ + struct switchdev_notifier_fdb_info info; + unsigned long notifier_type; + + info.addr = mac; + info.vid = vid; + notifier_type = adding ? SWITCHDEV_FDB_ADD_TO_DEVICE : SWITCHDEV_FDB_DEL_TO_DEVICE; + call_switchdev_notifiers(notifier_type, dev, &info.info); +} + +void +br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) +{ + if (!fdb->added_by_user) + return; + + switch (type) { + case RTM_DELNEIGH: + br_switchdev_fdb_call_notifiers(false, fdb->addr.addr, + fdb->vlan_id, + fdb->dst->dev); + break; + case RTM_NEWNEIGH: + br_switchdev_fdb_call_notifiers(true, fdb->addr.addr, + fdb->vlan_id, + fdb->dst->dev); + break; + } +} -- cgit v1.2.3