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bridge: Correctly unregister MDB rtnetlink handlers

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Commit 63233159fd:
    bridge: Do not unregister all PF_BRIDGE rtnl operations
introduced a bug where a removal of a single bridge from a
multi-bridge system would remove MDB netlink handlers.
The handlers should only be removed once all bridges are gone, but
since we don't keep track of the number of bridge interfaces, it's
simpler to do it when the bridge module is unloaded.  To make it
consistent, move the registration code into module initialization
code path.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2013-01-02 09:41:25 +00:00 committed by David S. Miller
parent 612a7c4e73
commit 3ec8e9f085
2 changed files with 12 additions and 3 deletions
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2
net/bridge/br_multicast.c
View file

@ -1608,7 +1608,6 @@ void br_multicast_init(struct net_bridge *br)
br_multicast_querier_expired, (unsigned long)br);
setup_timer(&br->multicast_query_timer, br_multicast_query_expired,
(unsigned long)br);
br_mdb_init();
}
void br_multicast_open(struct net_bridge *br)
@ -1633,7 +1632,6 @@ void br_multicast_stop(struct net_bridge *br)
del_timer_sync(&br->multicast_querier_timer);
del_timer_sync(&br->multicast_query_timer);
br_mdb_uninit();
spin_lock_bh(&br->multicast_lock);
mdb = mlock_dereference(br->mdb, br);
if (!mdb)

13
net/bridge/br_netlink.c
View file

@ -299,10 +299,21 @@ struct rtnl_link_ops br_link_ops __read_mostly = {
int __init br_netlink_init(void)
{
return rtnl_link_register(&br_link_ops);
int err;
br_mdb_init();
err = rtnl_link_register(&br_link_ops);
if (err)
goto out;
return 0;
out:
br_mdb_uninit();
return err;
}
void __exit br_netlink_fini(void)
{
br_mdb_uninit();
rtnl_link_unregister(&br_link_ops);
}