From: Nikolay Aleksandrov nikolay@cumulusnetworks.com
[ Upstream commit 7597b266c56feaad7d4e6e65822766e929407da2 ]
current code silently ignores change of port in the request message. This patch makes sure the port is modified and notification is sent to userspace.
Fixes: cf6b8e1eedff ("bridge: add API to notify bridge driver of learned FBD on offloaded device") Signed-off-by: Nikolay Aleksandrov nikolay@cumulusnetworks.com Signed-off-by: Roopa Prabhu roopa@cumulusnetworks.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- net/bridge/br_fdb.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-)
diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 09442e0f7f67..50213ff8ac73 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -1092,8 +1092,9 @@ void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, const unsigned char *addr, u16 vid) { - struct hlist_head *head; struct net_bridge_fdb_entry *fdb; + struct hlist_head *head; + bool modified = false; int err = 0;
ASSERT_RTNL(); @@ -1109,14 +1110,25 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, } fdb->added_by_external_learn = 1; fdb_notify(br, fdb, RTM_NEWNEIGH); - } else if (fdb->added_by_external_learn) { - /* Refresh entry */ - fdb->updated = fdb->used = jiffies; - } else if (!fdb->added_by_user) { - /* Take over SW learned entry */ - fdb->added_by_external_learn = 1; + } else { fdb->updated = jiffies; - fdb_notify(br, fdb, RTM_NEWNEIGH); + + if (fdb->dst != p) { + fdb->dst = p; + modified = true; + } + + if (fdb->added_by_external_learn) { + /* Refresh entry */ + fdb->used = jiffies; + } else if (!fdb->added_by_user) { + /* Take over SW learned entry */ + fdb->added_by_external_learn = 1; + modified = true; + } + + if (modified) + fdb_notify(br, fdb, RTM_NEWNEIGH); }
err_unlock: