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bridge: mdb: add vlan support for user entries 

Until now all user mdb entries were added in vlan 0, this patch adds
support to allow the user to specify the vlan for the entry.
About the uapi change a hole in struct br_mdb_entry is used so the size
and offsets are kept the same (verified with pahole and tested with older
iproute2).

Example:
$ bridge mdb
dev br0 port eth1 grp 239.0.0.1 permanent vlan 2000
dev br0 port eth1 grp 239.0.0.1 permanent vlan 200
dev br0 port eth1 grp 239.0.0.1 permanent

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2015-07-10 08:02:08 -07:00 committed by David S. Miller
parent c4675f9353
commit 74fe61f17e
2 changed files with 7 additions and 0 deletions
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1
include/uapi/linux/if_bridge.h
View File

@ -182,6 +182,7 @@ struct br_mdb_entry {
#define MDB_TEMPORARY 0
#define MDB_PERMANENT 1
__u8 state;
__u16 vid;
struct {
union {
__be32 ip4;

6
net/bridge/br_mdb.c
View File

@ -85,6 +85,7 @@ static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
memset(&e, 0, sizeof(e));
e.ifindex = port->dev->ifindex;
e.state = p->state;
e.vid = p->addr.vid;
if (p->addr.proto == htons(ETH_P_IP))
e.addr.u.ip4 = p->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
@ -242,6 +243,7 @@ void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
entry.addr.u.ip6 = group->u.ip6;
#endif
entry.state = state;
entry.vid = group->vid;
__br_mdb_notify(dev, &entry, type);
}
@ -264,6 +266,8 @@ static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
return false;
if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
return false;
if (entry->vid >= VLAN_VID_MASK)
return false;
return true;
}
@ -372,6 +376,7 @@ static int __br_mdb_add(struct net *net, struct net_bridge *br,
if (!p || p->br != br || p->state == BR_STATE_DISABLED)
return -EINVAL;
ip.vid = entry->vid;
ip.proto = entry->addr.proto;
if (ip.proto == htons(ETH_P_IP))
ip.u.ip4 = entry->addr.u.ip4;
@ -418,6 +423,7 @@ static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
if (!netif_running(br->dev) || br->multicast_disabled)
return -EINVAL;
ip.vid = entry->vid;
ip.proto = entry->addr.proto;
if (ip.proto == htons(ETH_P_IP)) {
if (timer_pending(&br->ip4_other_query.timer))