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authorAmerigo Wang <amwang@redhat.com>2012-12-03 23:56:40 +0000
committerDavid S. Miller <davem@davemloft.net>2012-12-05 16:01:27 -0500
commit50426b5925ff0d7f47c20e6886047f1bb6245901 (patch)
tree9a30b4f743be503bcd192784c0e52178d29f3734 /net/bridge
parenta573ea56a9b014e3ab09c44ccb659ba6d538b81e (diff)
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bridge: implement multicast fast leave
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>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_multicast.c21
-rw-r--r--net/bridge/br_private.h1
-rw-r--r--net/bridge/br_sysfs_if.c20
3 files changed, 42 insertions, 0 deletions
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 241743417f49..2391bae4f733 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -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;
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index eb9cd42146a5..cdbf9047a659 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -141,6 +141,7 @@ struct net_bridge_port
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
u32 multicast_startup_queries_sent;
unsigned char multicast_router;
+ unsigned char multicast_fast_leave;
struct timer_list multicast_router_timer;
struct timer_list multicast_query_timer;
struct hlist_head mglist;
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 7ff95ba21982..dc484ace0be3 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -172,6 +172,25 @@ static int store_multicast_router(struct net_bridge_port *p,
}
static BRPORT_ATTR(multicast_router, S_IRUGO | S_IWUSR, show_multicast_router,
store_multicast_router);
+
+static ssize_t show_multicast_fast_leave(struct net_bridge_port *p,
+ char *buf)
+{
+ return sprintf(buf, "%d\n", p->multicast_fast_leave);
+}
+
+static int store_multicast_fast_leave(struct net_bridge_port *p,
+ unsigned long v)
+{
+ if (p->br->multicast_disabled)
+ return -EINVAL;
+
+ p->multicast_fast_leave = !!v;
+ return 0;
+}
+
+static BRPORT_ATTR(multicast_fast_leave, S_IRUGO | S_IWUSR,
+ show_multicast_fast_leave, store_multicast_fast_leave);
#endif
static const struct brport_attribute *brport_attrs[] = {
@@ -195,6 +214,7 @@ static const struct brport_attribute *brport_attrs[] = {
&brport_attr_root_block,
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
&brport_attr_multicast_router,
+ &brport_attr_multicast_fast_leave,
#endif
NULL
};