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bridge: implement multicast fast leave 

V3: make it a flag
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>
This commit is contained in:
David S. Miller 2012-12-05 16:24:45 -05:00
parent 0d650ec75a
commit c2d3babfaf
5 changed files with 7 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/uapi/linux/if_link.h
View File

@ -218,6 +218,7 @@ enum {
IFLA_BRPORT_MODE, /* mode (hairpin) */
IFLA_BRPORT_GUARD, /* bpdu guard */
IFLA_BRPORT_PROTECT, /* root port protection */
IFLA_BRPORT_FAST_LEAVE, /* multicast fast leave */
__IFLA_BRPORT_MAX
};
#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)

2
net/bridge/br_multicast.c
View File

@ -1225,7 +1225,7 @@ static void br_multicast_leave_group(struct net_bridge *br,
if (!mp)
goto out;
if (port && port->multicast_fast_leave) {
if (port && (port->flags & BR_MULTICAST_FAST_LEAVE)) {
struct net_bridge_port_group __rcu **pp;
for (pp = &mp->ports;

4
net/bridge/br_netlink.c
View File

@ -53,7 +53,8 @@ static int br_port_fill_attrs(struct sk_buff *skb,
nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)))
nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)))
return -EMSGSIZE;
return 0;
@ -210,6 +211,7 @@ static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
if (tb[IFLA_BRPORT_COST]) {
err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));

2
net/bridge/br_private.h
View File

@ -137,11 +137,11 @@ struct net_bridge_port
#define BR_HAIRPIN_MODE 0x00000001
#define BR_BPDU_GUARD 0x00000002
#define BR_ROOT_BLOCK 0x00000004
#define BR_MULTICAST_FAST_LEAVE 0x00000008
#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;

19
net/bridge/br_sysfs_if.c
View File

@ -173,24 +173,7 @@ 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);
BRPORT_ATTR_FLAG(multicast_fast_leave, BR_MULTICAST_FAST_LEAVE);
#endif
static const struct brport_attribute *brport_attrs[] = {