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authorNikolay Aleksandrov <nikolay@cumulusnetworks.com>2015-07-28 14:10:44 +0300
committerDavid S. Miller <davem@davemloft.net>2015-07-30 01:02:30 +0300
commit7ae90a4f96486e3e20274afa1b8329802f5e1981 (patch)
tree41e2ee30eeb9e5f3091c4c6150ae960dd4a8ec94 /net
parent544586f742b43c6fd5fcb74c794d33b2ef189e64 (diff)
downloadlinux-7ae90a4f96486e3e20274afa1b8329802f5e1981.tar.xz
bridge: mdb: fix delmdb state in the notification
Since mdb states were introduced when deleting an entry the state was left as it was set in the delete request from the user which leads to the following output when doing a monitor (for example): $ bridge mdb add dev br0 port eth3 grp 239.0.0.1 permanent (monitor) dev br0 port eth3 grp 239.0.0.1 permanent $ bridge mdb del dev br0 port eth3 grp 239.0.0.1 permanent (monitor) dev br0 port eth3 grp 239.0.0.1 temp ^^^ Note the "temp" state in the delete notification which is wrong since the entry was permanent, the state in a delete is always reported as "temp" regardless of the real state of the entry. After this patch: $ bridge mdb add dev br0 port eth3 grp 239.0.0.1 permanent (monitor) dev br0 port eth3 grp 239.0.0.1 permanent $ bridge mdb del dev br0 port eth3 grp 239.0.0.1 permanent (monitor) dev br0 port eth3 grp 239.0.0.1 permanent There's one important note to make here that the state is actually not matched when doing a delete, so one can delete a permanent entry by stating "temp" in the end of the command, I've chosen this fix in order not to break user-space tools which rely on this (incorrect) behaviour. So to give an example after this patch and using the wrong state: $ bridge mdb add dev br0 port eth3 grp 239.0.0.1 permanent (monitor) dev br0 port eth3 grp 239.0.0.1 permanent $ bridge mdb del dev br0 port eth3 grp 239.0.0.1 temp (monitor) dev br0 port eth3 grp 239.0.0.1 permanent Note the state of the entry that got deleted is correct in the notification. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Fixes: ccb1c31a7a87 ("bridge: add flags to distinguish permanent mdb entires") Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_mdb.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 1198a3dbad95..c94321955db7 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -445,6 +445,7 @@ static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
if (p->port->state == BR_STATE_DISABLED)
goto unlock;
+ entry->state = p->state;
rcu_assign_pointer(*pp, p->next);
hlist_del_init(&p->mglist);
del_timer(&p->timer);