Commit 47d5b6db authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

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



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: default avatarAndrew Lunn <andrew@lunn.ch>
Acked-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2a26028d

include/net/switchdev.h

+1 −0
Original line number Diff line number Diff line
@@ -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 {

net/bridge/br_mdb.c

+43 −0
Original line number Diff line number Diff line
@@ -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;

net/switchdev/switchdev.c

+2 −0
Original line number Diff line number Diff line
@@ -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();

	}

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