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bridge: add flags to distinguish permanent mdb entires

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This patch adds a flag to each mdb entry, so that we can distinguish
permanent entries with temporary entries.

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 2012-12-14 22:09:51 +00:00 committed by David S. Miller
parent 9dd9ff9953
commit ccb1c31a7a
4 changed files with 17 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
include/uapi/linux/if_bridge.h
View file

@ -163,6 +163,9 @@ struct br_port_msg {
struct br_mdb_entry {
__u32 ifindex;
#define MDB_TEMPORARY 0
#define MDB_PERMANENT 1
__u8 state;
struct {
union {
__be32 ip4;

9
net/bridge/br_mdb.c
View file

@ -83,6 +83,7 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
if (port) {
struct br_mdb_entry e;
e.ifindex = port->dev->ifindex;
e.state = p->state;
e.addr.u.ip4 = p->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
e.addr.u.ip6 = p->addr.u.ip6;
@ -253,6 +254,8 @@ static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
#endif
} else
return false;
if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
return false;
return true;
}
@ -310,7 +313,7 @@ static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
struct br_ip *group)
struct br_ip *group, unsigned char state)
{
struct net_bridge_mdb_entry *mp;
struct net_bridge_port_group *p;
@ -336,7 +339,7 @@ static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
break;
}
p = br_multicast_new_port_group(port, group, *pp);
p = br_multicast_new_port_group(port, group, *pp, state);
if (unlikely(!p))
return -ENOMEM;
rcu_assign_pointer(*pp, p);
@ -373,7 +376,7 @@ static int __br_mdb_add(struct net *net, struct net_bridge *br,
#endif
spin_lock_bh(&br->multicast_lock);
ret = br_mdb_add_group(br, p, &ip);
ret = br_mdb_add_group(br, p, &ip, entry->state);
spin_unlock_bh(&br->multicast_lock);
return ret;
}

8
net/bridge/br_multicast.c
View file

@ -279,7 +279,7 @@ static void br_multicast_port_group_expired(unsigned long data)
spin_lock(&br->multicast_lock);
if (!netif_running(br->dev) || timer_pending(&pg->timer) ||
hlist_unhashed(&pg->mglist))
hlist_unhashed(&pg->mglist) || pg->state & MDB_PERMANENT)
goto out;
br_multicast_del_pg(br, pg);
@ -622,7 +622,8 @@ struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
struct net_bridge_port_group *br_multicast_new_port_group(
struct net_bridge_port *port,
struct br_ip *group,
struct net_bridge_port_group __rcu *next)
struct net_bridge_port_group __rcu *next,
unsigned char state)
{
struct net_bridge_port_group *p;
@ -632,6 +633,7 @@ struct net_bridge_port_group *br_multicast_new_port_group(
p->addr = *group;
p->port = port;
p->state = state;
rcu_assign_pointer(p->next, next);
hlist_add_head(&p->mglist, &port->mglist);
setup_timer(&p->timer, br_multicast_port_group_expired,
@ -674,7 +676,7 @@ static int br_multicast_add_group(struct net_bridge *br,
break;
}
p = br_multicast_new_port_group(port, group, *pp);
p = br_multicast_new_port_group(port, group, *pp, MDB_TEMPORARY);
if (unlikely(!p))
goto err;
rcu_assign_pointer(*pp, p);

4
net/bridge/br_private.h
View file

@ -83,6 +83,7 @@ struct net_bridge_port_group {
struct rcu_head rcu;
struct timer_list timer;
struct br_ip addr;
unsigned char state;
};
struct net_bridge_mdb_entry
@ -443,7 +444,8 @@ extern void br_multicast_free_pg(struct rcu_head *head);
extern struct net_bridge_port_group *br_multicast_new_port_group(
struct net_bridge_port *port,
struct br_ip *group,
struct net_bridge_port_group *next);
struct net_bridge_port_group *next,
unsigned char state);
extern void br_mdb_init(void);
extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
struct br_ip *group, int type);