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bridge: mdb: add vlan support for user entries

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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))