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net: bridge: Add/del switchdev object on host join/leave

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When the host joins or leaves a multicast group, use switchdev to add
an object to the hardware to forward traffic for the group to the
host.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn 2017-11-09 23:10:59 +01:00 committed by David S. Miller
parent 2a26028d11
commit 47d5b6db2a
3 changed files with 46 additions and 0 deletions
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1
include/net/switchdev.h
View File

@ -76,6 +76,7 @@ enum switchdev_obj_id {
SWITCHDEV_OBJ_ID_UNDEFINED,
SWITCHDEV_OBJ_ID_PORT_VLAN,
SWITCHDEV_OBJ_ID_PORT_MDB,
SWITCHDEV_OBJ_ID_HOST_MDB,
};
struct switchdev_obj {

43
net/bridge/br_mdb.c
View File

@ -292,6 +292,46 @@ err:
kfree(priv);
}
static void br_mdb_switchdev_host_port(struct net_device *dev,
struct net_device *lower_dev,
struct br_mdb_entry *entry, int type)
{
struct switchdev_obj_port_mdb mdb = {
.obj = {
.id = SWITCHDEV_OBJ_ID_HOST_MDB,
.flags = SWITCHDEV_F_DEFER,
},
.vid = entry->vid,
};
if (entry->addr.proto == htons(ETH_P_IP))
ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
#if IS_ENABLED(CONFIG_IPV6)
else
ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
#endif
mdb.obj.orig_dev = dev;
switch (type) {
case RTM_NEWMDB:
switchdev_port_obj_add(lower_dev, &mdb.obj);
break;
case RTM_DELMDB:
switchdev_port_obj_del(lower_dev, &mdb.obj);
break;
}
}
static void br_mdb_switchdev_host(struct net_device *dev,
struct br_mdb_entry *entry, int type)
{
struct net_device *lower_dev;
struct list_head *iter;
netdev_for_each_lower_dev(dev, lower_dev, iter)
br_mdb_switchdev_host_port(dev, lower_dev, entry, type);
}
static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p,
struct br_mdb_entry *entry, int type)
{
@ -331,6 +371,9 @@ static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p,
switchdev_port_obj_del(port_dev, &mdb.obj);
}
if (!p)
br_mdb_switchdev_host(dev, entry, type);
skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
if (!skb)
goto errout;

2
net/switchdev/switchdev.c
View File

@ -345,6 +345,8 @@ static size_t switchdev_obj_size(const struct switchdev_obj *obj)
return sizeof(struct switchdev_obj_port_vlan);
case SWITCHDEV_OBJ_ID_PORT_MDB:
return sizeof(struct switchdev_obj_port_mdb);
case SWITCHDEV_OBJ_ID_HOST_MDB:
return sizeof(struct switchdev_obj_port_mdb);
default:
BUG();
}