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bridge: implement multicast fast leave

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V2: make the toggle per-port

Fast leave allows bridge to immediately stops the multicast
traffic on the port receives IGMP Leave when IGMP snooping is enabled,
no timeouts are observed.

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amerigo Wang
2012-12-03 23:56:40 +00:00
committed by David S. Miller
parent a573ea56a9
commit 50426b5925
3 changed files with 42 additions and 0 deletions
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21
net/bridge/br_multicast.c
View File

@@ -1225,6 +1225,27 @@ static void br_multicast_leave_group(struct net_bridge *br,
if (!mp)
goto out;
if (port && port->multicast_fast_leave) {
struct net_bridge_port_group __rcu **pp;
for (pp = &mp->ports;
(p = mlock_dereference(*pp, br)) != NULL;
pp = &p->next) {
if (p->port != port)
continue;
rcu_assign_pointer(*pp, p->next);
hlist_del_init(&p->mglist);
del_timer(&p->timer);
call_rcu_bh(&p->rcu, br_multicast_free_pg);
if (!mp->ports && !mp->mglist &&
netif_running(br->dev))
mod_timer(&mp->timer, jiffies);
}
goto out;
}
now = jiffies;
time = now + br->multicast_last_member_count *
br->multicast_last_member_interval;