[mirror_ubuntu-artful-kernel.git] / net / bridge / br_mdb.c

#include <linux/err.h>
#include <linux/igmp.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/rculist.h>
#include <linux/skbuff.h>
#include <linux/if_ether.h>
#include <net/ip.h>
#include <net/netlink.h>
#include <net/switchdev.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <net/ipv6.h>
#include <net/addrconf.h>
#endif

#include "br_private.h"

static int br_rports_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
			       struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_port *p;
	struct nlattr *nest;

	if (!br->multicast_router || hlist_empty(&br->router_list))
		return 0;

	nest = nla_nest_start(skb, MDBA_ROUTER);
	if (nest == NULL)
		return -EMSGSIZE;

	hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
		if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
			goto fail;
	}

	nla_nest_end(skb, nest);
	return 0;
fail:
	nla_nest_cancel(skb, nest);
	return -EMSGSIZE;
}

static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
{
	e->state = flags & MDB_PG_FLAGS_PERMANENT;
	e->flags = 0;
	if (flags & MDB_PG_FLAGS_OFFLOAD)
		e->flags |= MDB_FLAGS_OFFLOAD;
}

static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
			    struct net_device *dev)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_mdb_htable *mdb;
	struct nlattr *nest, *nest2;
	int i, err = 0;
	int idx = 0, s_idx = cb->args[1];

	if (br->multicast_disabled)
		return 0;

	mdb = rcu_dereference(br->mdb);
	if (!mdb)
		return 0;

	nest = nla_nest_start(skb, MDBA_MDB);
	if (nest == NULL)
		return -EMSGSIZE;

	for (i = 0; i < mdb->max; i++) {
		struct net_bridge_mdb_entry *mp;
		struct net_bridge_port_group *p;
		struct net_bridge_port_group __rcu **pp;
		struct net_bridge_port *port;

		hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
			if (idx < s_idx)
				goto skip;

			nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
			if (nest2 == NULL) {
				err = -EMSGSIZE;
				goto out;
			}

			for (pp = &mp->ports;
			     (p = rcu_dereference(*pp)) != NULL;
			      pp = &p->next) {
				struct nlattr *nest_ent;
				struct br_mdb_entry e;

				port = p->port;
				if (!port)
					continue;

				memset(&e, 0, sizeof(e));
				e.ifindex = port->dev->ifindex;
				e.vid = p->addr.vid;
				__mdb_entry_fill_flags(&e, p->flags);
				if (p->addr.proto == htons(ETH_P_IP))
					e.addr.u.ip4 = p->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
				if (p->addr.proto == htons(ETH_P_IPV6))
					e.addr.u.ip6 = p->addr.u.ip6;
#endif
				e.addr.proto = p->addr.proto;
				nest_ent = nla_nest_start(skb,
							  MDBA_MDB_ENTRY_INFO);
				if (!nest_ent) {
					nla_nest_cancel(skb, nest2);
					err = -EMSGSIZE;
					goto out;
				}
				if (nla_put_nohdr(skb, sizeof(e), &e) ||
				    nla_put_u32(skb,
						MDBA_MDB_EATTR_TIMER,
						br_timer_value(&p->timer))) {
					nla_nest_cancel(skb, nest_ent);
					nla_nest_cancel(skb, nest2);
					err = -EMSGSIZE;
					goto out;
				}
				nla_nest_end(skb, nest_ent);
			}
			nla_nest_end(skb, nest2);
		skip:
			idx++;
		}
	}

out:
	cb->args[1] = idx;
	nla_nest_end(skb, nest);
	return err;
}

static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct net_device *dev;
	struct net *net = sock_net(skb->sk);
	struct nlmsghdr *nlh = NULL;
	int idx = 0, s_idx;

	s_idx = cb->args[0];

	rcu_read_lock();

	/* In theory this could be wrapped to 0... */
	cb->seq = net->dev_base_seq + br_mdb_rehash_seq;

	for_each_netdev_rcu(net, dev) {
		if (dev->priv_flags & IFF_EBRIDGE) {
			struct br_port_msg *bpm;

			if (idx < s_idx)
				goto skip;

			nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
					cb->nlh->nlmsg_seq, RTM_GETMDB,
					sizeof(*bpm), NLM_F_MULTI);
			if (nlh == NULL)
				break;

			bpm = nlmsg_data(nlh);
			memset(bpm, 0, sizeof(*bpm));
			bpm->ifindex = dev->ifindex;
			if (br_mdb_fill_info(skb, cb, dev) < 0)
				goto out;
			if (br_rports_fill_info(skb, cb, dev) < 0)
				goto out;

			cb->args[1] = 0;
			nlmsg_end(skb, nlh);
		skip:
			idx++;
		}
	}

out:
	if (nlh)
		nlmsg_end(skb, nlh);
	rcu_read_unlock();
	cb->args[0] = idx;
	return skb->len;
}

static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
				   struct net_device *dev,
				   struct br_mdb_entry *entry, u32 pid,
				   u32 seq, int type, unsigned int flags)
{
	struct nlmsghdr *nlh;
	struct br_port_msg *bpm;
	struct nlattr *nest, *nest2;

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
	if (!nlh)
		return -EMSGSIZE;

	bpm = nlmsg_data(nlh);
	memset(bpm, 0, sizeof(*bpm));
	bpm->family  = AF_BRIDGE;
	bpm->ifindex = dev->ifindex;
	nest = nla_nest_start(skb, MDBA_MDB);
	if (nest == NULL)
		goto cancel;
	nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
	if (nest2 == NULL)
		goto end;

	if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
		goto end;

	nla_nest_end(skb, nest2);
	nla_nest_end(skb, nest);
	nlmsg_end(skb, nlh);
	return 0;

end:
	nla_nest_end(skb, nest);
cancel:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

static inline size_t rtnl_mdb_nlmsg_size(void)
{
	return NLMSG_ALIGN(sizeof(struct br_port_msg))
		+ nla_total_size(sizeof(struct br_mdb_entry));
}

static void __br_mdb_notify(struct net_device *dev, struct br_mdb_entry *entry,
			    int type, struct net_bridge_port_group *pg)
{
	struct switchdev_obj_port_mdb mdb = {
		.obj = {
			.id = SWITCHDEV_OBJ_ID_PORT_MDB,
			.flags = SWITCHDEV_F_DEFER,
		},
		.vid = entry->vid,
	};
	struct net_device *port_dev;
	struct net *net = dev_net(dev);
	struct sk_buff *skb;
	int err = -ENOBUFS;

	port_dev = __dev_get_by_index(net, entry->ifindex);
	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 = port_dev;
	if (port_dev && type == RTM_NEWMDB) {
		err = switchdev_port_obj_add(port_dev, &mdb.obj);
		if (!err && pg)
			pg->flags |= MDB_PG_FLAGS_OFFLOAD;
	} else if (port_dev && type == RTM_DELMDB) {
		switchdev_port_obj_del(port_dev, &mdb.obj);
	}

	skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
	if (!skb)
		goto errout;

	err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
	if (err < 0) {
		kfree_skb(skb);
		goto errout;
	}

	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
	return;
errout:
	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
}

void br_mdb_notify(struct net_device *dev, struct net_bridge_port_group *pg,
		   int type)
{
	struct br_mdb_entry entry;

	memset(&entry, 0, sizeof(entry));
	entry.ifindex = pg->port->dev->ifindex;
	entry.addr.proto = pg->addr.proto;
	entry.addr.u.ip4 = pg->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
	entry.addr.u.ip6 = pg->addr.u.ip6;
#endif
	entry.vid = pg->addr.vid;
	__mdb_entry_fill_flags(&entry, pg->flags);
	__br_mdb_notify(dev, &entry, type, pg);
}

static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
				   struct net_device *dev,
				   int ifindex, u32 pid,
				   u32 seq, int type, unsigned int flags)
{
	struct br_port_msg *bpm;
	struct nlmsghdr *nlh;
	struct nlattr *nest;

	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
	if (!nlh)
		return -EMSGSIZE;

	bpm = nlmsg_data(nlh);
	memset(bpm, 0, sizeof(*bpm));
	bpm->family = AF_BRIDGE;
	bpm->ifindex = dev->ifindex;
	nest = nla_nest_start(skb, MDBA_ROUTER);
	if (!nest)
		goto cancel;

	if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
		goto end;

	nla_nest_end(skb, nest);
	nlmsg_end(skb, nlh);
	return 0;

end:
	nla_nest_end(skb, nest);
cancel:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

static inline size_t rtnl_rtr_nlmsg_size(void)
{
	return NLMSG_ALIGN(sizeof(struct br_port_msg))
		+ nla_total_size(sizeof(__u32));
}

void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
		   int type)
{
	struct net *net = dev_net(dev);
	struct sk_buff *skb;
	int err = -ENOBUFS;
	int ifindex;

	ifindex = port ? port->dev->ifindex : 0;
	skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
	if (!skb)
		goto errout;

	err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
	if (err < 0) {
		kfree_skb(skb);
		goto errout;
	}

	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
	return;

errout:
	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
}

static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
{
	if (entry->ifindex == 0)
		return false;

	if (entry->addr.proto == htons(ETH_P_IP)) {
		if (!ipv4_is_multicast(entry->addr.u.ip4))
			return false;
		if (ipv4_is_local_multicast(entry->addr.u.ip4))
			return false;
#if IS_ENABLED(CONFIG_IPV6)
	} else if (entry->addr.proto == htons(ETH_P_IPV6)) {
		if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
			return false;
#endif
	} else
		return false;
	if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
		return false;
	if (entry->vid >= VLAN_VID_MASK)
		return false;

	return true;
}

static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
			struct net_device **pdev, struct br_mdb_entry **pentry)
{
	struct net *net = sock_net(skb->sk);
	struct br_mdb_entry *entry;
	struct br_port_msg *bpm;
	struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
	struct net_device *dev;
	int err;

	err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
	if (err < 0)
		return err;

	bpm = nlmsg_data(nlh);
	if (bpm->ifindex == 0) {
		pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
		return -EINVAL;
	}

	dev = __dev_get_by_index(net, bpm->ifindex);
	if (dev == NULL) {
		pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
		return -ENODEV;
	}

	if (!(dev->priv_flags & IFF_EBRIDGE)) {
		pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
		return -EOPNOTSUPP;
	}

	*pdev = dev;

	if (!tb[MDBA_SET_ENTRY] ||
	    nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
		pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
		return -EINVAL;
	}

	entry = nla_data(tb[MDBA_SET_ENTRY]);
	if (!is_valid_mdb_entry(entry)) {
		pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
		return -EINVAL;
	}

	*pentry = entry;
	return 0;
}

static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
			    struct br_ip *group, unsigned char state,
			    struct net_bridge_port_group **pg)
{
	struct net_bridge_mdb_entry *mp;
	struct net_bridge_port_group *p;
	struct net_bridge_port_group __rcu **pp;
	struct net_bridge_mdb_htable *mdb;
	unsigned long now = jiffies;
	int err;

	mdb = mlock_dereference(br->mdb, br);
	mp = br_mdb_ip_get(mdb, group);
	if (!mp) {
		mp = br_multicast_new_group(br, port, group);
		err = PTR_ERR_OR_ZERO(mp);
		if (err)
			return err;
	}

	for (pp = &mp->ports;
	     (p = mlock_dereference(*pp, br)) != NULL;
	     pp = &p->next) {
		if (p->port == port)
			return -EEXIST;
		if ((unsigned long)p->port < (unsigned long)port)
			break;
	}

	p = br_multicast_new_port_group(port, group, *pp, state);
	if (unlikely(!p))
		return -ENOMEM;
	rcu_assign_pointer(*pp, p);
	*pg = p;
	if (state == MDB_TEMPORARY)
		mod_timer(&p->timer, now + br->multicast_membership_interval);

	return 0;
}

static int __br_mdb_add(struct net *net, struct net_bridge *br,
			struct br_mdb_entry *entry,
			struct net_bridge_port_group **pg)
{
	struct br_ip ip;
	struct net_device *dev;
	struct net_bridge_port *p;
	int ret;

	if (!netif_running(br->dev) || br->multicast_disabled)
		return -EINVAL;

	dev = __dev_get_by_index(net, entry->ifindex);
	if (!dev)
		return -ENODEV;

	p = br_port_get_rtnl(dev);
	if (!p || p->br != br || p->state == BR_STATE_DISABLED)
		return -EINVAL;

	memset(&ip, 0, sizeof(ip));
	ip.vid = entry->vid;
	ip.proto = entry->addr.proto;
	if (ip.proto == htons(ETH_P_IP))
		ip.u.ip4 = entry->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
	else
		ip.u.ip6 = entry->addr.u.ip6;
#endif

	spin_lock_bh(&br->multicast_lock);
	ret = br_mdb_add_group(br, p, &ip, entry->state, pg);
	spin_unlock_bh(&br->multicast_lock);
	return ret;
}

static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct net *net = sock_net(skb->sk);
	struct net_bridge_port_group *pg;
	struct net_bridge_vlan_group *vg;
	struct net_device *dev, *pdev;
	struct br_mdb_entry *entry;
	struct net_bridge_port *p;
	struct net_bridge_vlan *v;
	struct net_bridge *br;
	int err;

	err = br_mdb_parse(skb, nlh, &dev, &entry);
	if (err < 0)
		return err;

	br = netdev_priv(dev);

	/* If vlan filtering is enabled and VLAN is not specified
	 * install mdb entry on all vlans configured on the port.
	 */
	pdev = __dev_get_by_index(net, entry->ifindex);
	if (!pdev)
		return -ENODEV;

	p = br_port_get_rtnl(pdev);
	if (!p || p->br != br || p->state == BR_STATE_DISABLED)
		return -EINVAL;

	vg = nbp_vlan_group(p);
	if (br_vlan_enabled(br) && vg && entry->vid == 0) {
		list_for_each_entry(v, &vg->vlan_list, vlist) {
			entry->vid = v->vid;
			err = __br_mdb_add(net, br, entry, &pg);
			if (err)
				break;
			__br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
		}
	} else {
		err = __br_mdb_add(net, br, entry, &pg);
		if (!err)
			__br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
	}

	return err;
}

static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
{
	struct net_bridge_mdb_htable *mdb;
	struct net_bridge_mdb_entry *mp;
	struct net_bridge_port_group *p;
	struct net_bridge_port_group __rcu **pp;
	struct br_ip ip;
	int err = -EINVAL;

	if (!netif_running(br->dev) || br->multicast_disabled)
		return -EINVAL;

	memset(&ip, 0, sizeof(ip));
	ip.vid = entry->vid;
	ip.proto = entry->addr.proto;
	if (ip.proto == htons(ETH_P_IP))
		ip.u.ip4 = entry->addr.u.ip4;
#if IS_ENABLED(CONFIG_IPV6)
	else
		ip.u.ip6 = entry->addr.u.ip6;
#endif

	spin_lock_bh(&br->multicast_lock);
	mdb = mlock_dereference(br->mdb, br);

	mp = br_mdb_ip_get(mdb, &ip);
	if (!mp)
		goto unlock;

	for (pp = &mp->ports;
	     (p = mlock_dereference(*pp, br)) != NULL;
	     pp = &p->next) {
		if (!p->port || p->port->dev->ifindex != entry->ifindex)
			continue;

		if (p->port->state == BR_STATE_DISABLED)
			goto unlock;

		__mdb_entry_fill_flags(entry, p->flags);
		rcu_assign_pointer(*pp, p->next);
		hlist_del_init(&p->mglist);
		del_timer(&p->timer);
		call_rcu_bh(&p->rcu, br_multicast_free_pg);
		err = 0;

		if (!mp->ports && !mp->mglist &&
		    netif_running(br->dev))
			mod_timer(&mp->timer, jiffies);
		break;
	}

unlock:
	spin_unlock_bh(&br->multicast_lock);
	return err;
}

static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct net *net = sock_net(skb->sk);
	struct net_bridge_vlan_group *vg;
	struct net_device *dev, *pdev;
	struct br_mdb_entry *entry;
	struct net_bridge_port *p;
	struct net_bridge_vlan *v;
	struct net_bridge *br;
	int err;

	err = br_mdb_parse(skb, nlh, &dev, &entry);
	if (err < 0)
		return err;

	br = netdev_priv(dev);

	/* If vlan filtering is enabled and VLAN is not specified
	 * delete mdb entry on all vlans configured on the port.
	 */
	pdev = __dev_get_by_index(net, entry->ifindex);
	if (!pdev)
		return -ENODEV;

	p = br_port_get_rtnl(pdev);
	if (!p || p->br != br || p->state == BR_STATE_DISABLED)
		return -EINVAL;

	vg = nbp_vlan_group(p);
	if (br_vlan_enabled(br) && vg && entry->vid == 0) {
		list_for_each_entry(v, &vg->vlan_list, vlist) {
			entry->vid = v->vid;
			err = __br_mdb_del(br, entry);
			if (!err)
				__br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
		}
	} else {
		err = __br_mdb_del(br, entry);
		if (!err)
			__br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
	}

	return err;
}

void br_mdb_init(void)
{
	rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
	rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
	rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
}

void br_mdb_uninit(void)
{
	rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
	rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
	rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
}
Commit	Line	Data
ee07c6e7 CW	1	#include <linux/err.h>
	2	#include <linux/igmp.h>
	3	#include <linux/kernel.h>
	4	#include <linux/netdevice.h>
	5	#include <linux/rculist.h>
	6	#include <linux/skbuff.h>
cfd56754	7	#include <linux/if_ether.h>
ee07c6e7 CW	8	#include <net/ip.h>
ee07c6e7 CW	9	#include <net/netlink.h>
f1fecb1d	10	#include <net/switchdev.h>
ee07c6e7 CW	11	#if IS_ENABLED(CONFIG_IPV6)
ee07c6e7 CW	12	#include <net/ipv6.h>
3c3769e6	13	#include <net/addrconf.h>
ee07c6e7 CW	14	#endif
	15
	16	#include "br_private.h"
	17
	18	static int br_rports_fill_info(struct sk_buff skb, struct netlink_callback cb,
	19	struct net_device *dev)
	20	{
	21	struct net_bridge *br = netdev_priv(dev);
	22	struct net_bridge_port *p;
ee07c6e7 CW	23	struct nlattr *nest;
	24
	25	if (!br->multicast_router \|\| hlist_empty(&br->router_list))
	26	return 0;
	27
	28	nest = nla_nest_start(skb, MDBA_ROUTER);
	29	if (nest == NULL)
	30	return -EMSGSIZE;
	31
b67bfe0d	32	hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
ee07c6e7 CW	33	if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
	34	goto fail;
	35	}
	36
	37	nla_nest_end(skb, nest);
	38	return 0;
	39	fail:
	40	nla_nest_cancel(skb, nest);
	41	return -EMSGSIZE;
	42	}
	43
9d06b6d8 ER	44	static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
	45	{
	46	e->state = flags & MDB_PG_FLAGS_PERMANENT;
	47	e->flags = 0;
	48	if (flags & MDB_PG_FLAGS_OFFLOAD)
	49	e->flags \|= MDB_FLAGS_OFFLOAD;
	50	}
	51
ee07c6e7 CW	52	static int br_mdb_fill_info(struct sk_buff skb, struct netlink_callback cb,
	53	struct net_device *dev)
	54	{
	55	struct net_bridge *br = netdev_priv(dev);
	56	struct net_bridge_mdb_htable *mdb;
	57	struct nlattr nest, nest2;
	58	int i, err = 0;
	59	int idx = 0, s_idx = cb->args[1];
	60
	61	if (br->multicast_disabled)
	62	return 0;
	63
	64	mdb = rcu_dereference(br->mdb);
	65	if (!mdb)
	66	return 0;
	67
	68	nest = nla_nest_start(skb, MDBA_MDB);
	69	if (nest == NULL)
	70	return -EMSGSIZE;
	71
	72	for (i = 0; i < mdb->max; i++) {
ee07c6e7	73	struct net_bridge_mdb_entry *mp;
762a3d89	74	struct net_bridge_port_group *p;
762a3d89	75	struct net_bridge_port_group __rcu **pp;
ee07c6e7 CW	76	struct net_bridge_port *port;
ee07c6e7 CW	77
b67bfe0d	78	hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
ee07c6e7 CW	79	if (idx < s_idx)
	80	goto skip;
	81
	82	nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
	83	if (nest2 == NULL) {
	84	err = -EMSGSIZE;
	85	goto out;
	86	}
	87
	88	for (pp = &mp->ports;
	89	(p = rcu_dereference(*pp)) != NULL;
	90	pp = &p->next) {
21257156	91	struct nlattr *nest_ent;
76cc173d NA	92	struct br_mdb_entry e;
76cc173d NA	93
ee07c6e7	94	port = p->port;
76cc173d NA	95	if (!port)
76cc173d NA	96	continue;
21257156	97
76cc173d NA	98	memset(&e, 0, sizeof(e));
	99	e.ifindex = port->dev->ifindex;
	100	e.vid = p->addr.vid;
	101	__mdb_entry_fill_flags(&e, p->flags);
	102	if (p->addr.proto == htons(ETH_P_IP))
	103	e.addr.u.ip4 = p->addr.u.ip4;
ee07c6e7	104	#if IS_ENABLED(CONFIG_IPV6)
76cc173d NA	105	if (p->addr.proto == htons(ETH_P_IPV6))
76cc173d NA	106	e.addr.u.ip6 = p->addr.u.ip6;
ee07c6e7	107	#endif
76cc173d	108	e.addr.proto = p->addr.proto;
21257156 NA	109	nest_ent = nla_nest_start(skb,
	110	MDBA_MDB_ENTRY_INFO);
	111	if (!nest_ent) {
	112	nla_nest_cancel(skb, nest2);
	113	err = -EMSGSIZE;
	114	goto out;
	115	}
	116	if (nla_put_nohdr(skb, sizeof(e), &e) \|\|
	117	nla_put_u32(skb,
	118	MDBA_MDB_EATTR_TIMER,
	119	br_timer_value(&p->timer))) {
	120	nla_nest_cancel(skb, nest_ent);
76cc173d NA	121	nla_nest_cancel(skb, nest2);
	122	err = -EMSGSIZE;
	123	goto out;
ee07c6e7	124	}
21257156	125	nla_nest_end(skb, nest_ent);
ee07c6e7 CW	126	}
	127	nla_nest_end(skb, nest2);
	128	skip:
	129	idx++;
	130	}
	131	}
	132
	133	out:
	134	cb->args[1] = idx;
	135	nla_nest_end(skb, nest);
	136	return err;
	137	}
	138
	139	static int br_mdb_dump(struct sk_buff skb, struct netlink_callback cb)
	140	{
	141	struct net_device *dev;
	142	struct net *net = sock_net(skb->sk);
	143	struct nlmsghdr *nlh = NULL;
	144	int idx = 0, s_idx;
	145
	146	s_idx = cb->args[0];
	147
	148	rcu_read_lock();
	149
2ce297fc CW	150	/* In theory this could be wrapped to 0... */
2ce297fc CW	151	cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
ee07c6e7 CW	152
	153	for_each_netdev_rcu(net, dev) {
	154	if (dev->priv_flags & IFF_EBRIDGE) {
	155	struct br_port_msg *bpm;
	156
	157	if (idx < s_idx)
	158	goto skip;
	159
	160	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
	161	cb->nlh->nlmsg_seq, RTM_GETMDB,
	162	sizeof(*bpm), NLM_F_MULTI);
	163	if (nlh == NULL)
	164	break;
	165
	166	bpm = nlmsg_data(nlh);
c085c499	167	memset(bpm, 0, sizeof(*bpm));
ee07c6e7 CW	168	bpm->ifindex = dev->ifindex;
	169	if (br_mdb_fill_info(skb, cb, dev) < 0)
	170	goto out;
	171	if (br_rports_fill_info(skb, cb, dev) < 0)
	172	goto out;
	173
	174	cb->args[1] = 0;
	175	nlmsg_end(skb, nlh);
	176	skip:
	177	idx++;
	178	}
	179	}
	180
	181	out:
	182	if (nlh)
	183	nlmsg_end(skb, nlh);
	184	rcu_read_unlock();
	185	cb->args[0] = idx;
	186	return skb->len;
	187	}
	188
37a393bc CW	189	static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
	190	struct net_device *dev,
	191	struct br_mdb_entry *entry, u32 pid,
	192	u32 seq, int type, unsigned int flags)
	193	{
	194	struct nlmsghdr *nlh;
	195	struct br_port_msg *bpm;
	196	struct nlattr nest, nest2;
	197
82199679	198	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
37a393bc CW	199	if (!nlh)
	200	return -EMSGSIZE;
	201
	202	bpm = nlmsg_data(nlh);
c085c499	203	memset(bpm, 0, sizeof(*bpm));
37a393bc CW	204	bpm->family = AF_BRIDGE;
	205	bpm->ifindex = dev->ifindex;
	206	nest = nla_nest_start(skb, MDBA_MDB);
	207	if (nest == NULL)
	208	goto cancel;
	209	nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
	210	if (nest2 == NULL)
	211	goto end;
	212
	213	if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
	214	goto end;
	215
	216	nla_nest_end(skb, nest2);
	217	nla_nest_end(skb, nest);
053c095a JB	218	nlmsg_end(skb, nlh);
053c095a JB	219	return 0;
37a393bc CW	220
	221	end:
	222	nla_nest_end(skb, nest);
	223	cancel:
	224	nlmsg_cancel(skb, nlh);
	225	return -EMSGSIZE;
	226	}
	227
	228	static inline size_t rtnl_mdb_nlmsg_size(void)
	229	{
	230	return NLMSG_ALIGN(sizeof(struct br_port_msg))
	231	+ nla_total_size(sizeof(struct br_mdb_entry));
	232	}
	233
	234	static void __br_mdb_notify(struct net_device dev, struct br_mdb_entry entry,
9e8430f8	235	int type, struct net_bridge_port_group *pg)
37a393bc	236	{
f1fecb1d ER	237	struct switchdev_obj_port_mdb mdb = {
	238	.obj = {
	239	.id = SWITCHDEV_OBJ_ID_PORT_MDB,
	240	.flags = SWITCHDEV_F_DEFER,
	241	},
	242	.vid = entry->vid,
	243	};
	244	struct net_device *port_dev;
37a393bc CW	245	struct net *net = dev_net(dev);
	246	struct sk_buff *skb;
	247	int err = -ENOBUFS;
	248
f1fecb1d ER	249	port_dev = __dev_get_by_index(net, entry->ifindex);
	250	if (entry->addr.proto == htons(ETH_P_IP))
	251	ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
	252	#if IS_ENABLED(CONFIG_IPV6)
	253	else
	254	ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
	255	#endif
	256
	257	mdb.obj.orig_dev = port_dev;
9e8430f8 ER	258	if (port_dev && type == RTM_NEWMDB) {
	259	err = switchdev_port_obj_add(port_dev, &mdb.obj);
	260	if (!err && pg)
	261	pg->flags \|= MDB_PG_FLAGS_OFFLOAD;
	262	} else if (port_dev && type == RTM_DELMDB) {
f1fecb1d	263	switchdev_port_obj_del(port_dev, &mdb.obj);
9e8430f8	264	}
f1fecb1d	265
37a393bc CW	266	skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
	267	if (!skb)
	268	goto errout;
	269
	270	err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
	271	if (err < 0) {
	272	kfree_skb(skb);
	273	goto errout;
	274	}
	275
	276	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
	277	return;
	278	errout:
	279	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
	280	}
	281
9e8430f8 ER	282	void br_mdb_notify(struct net_device dev, struct net_bridge_port_group pg,
9e8430f8 ER	283	int type)
37a393bc CW	284	{
	285	struct br_mdb_entry entry;
	286
c085c499	287	memset(&entry, 0, sizeof(entry));
9e8430f8 ER	288	entry.ifindex = pg->port->dev->ifindex;
	289	entry.addr.proto = pg->addr.proto;
	290	entry.addr.u.ip4 = pg->addr.u.ip4;
37a393bc	291	#if IS_ENABLED(CONFIG_IPV6)
9e8430f8	292	entry.addr.u.ip6 = pg->addr.u.ip6;
37a393bc	293	#endif
9e8430f8 ER	294	entry.vid = pg->addr.vid;
	295	__mdb_entry_fill_flags(&entry, pg->flags);
	296	__br_mdb_notify(dev, &entry, type, pg);
37a393bc CW	297	}
37a393bc CW	298
949f1e39 SA	299	static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
	300	struct net_device *dev,
	301	int ifindex, u32 pid,
	302	u32 seq, int type, unsigned int flags)
	303	{
	304	struct br_port_msg *bpm;
	305	struct nlmsghdr *nlh;
	306	struct nlattr *nest;
	307
	308	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
	309	if (!nlh)
	310	return -EMSGSIZE;
	311
	312	bpm = nlmsg_data(nlh);
	313	memset(bpm, 0, sizeof(*bpm));
	314	bpm->family = AF_BRIDGE;
	315	bpm->ifindex = dev->ifindex;
	316	nest = nla_nest_start(skb, MDBA_ROUTER);
	317	if (!nest)
	318	goto cancel;
	319
	320	if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
	321	goto end;
	322
	323	nla_nest_end(skb, nest);
	324	nlmsg_end(skb, nlh);
	325	return 0;
	326
	327	end:
	328	nla_nest_end(skb, nest);
	329	cancel:
	330	nlmsg_cancel(skb, nlh);
	331	return -EMSGSIZE;
	332	}
	333
	334	static inline size_t rtnl_rtr_nlmsg_size(void)
	335	{
	336	return NLMSG_ALIGN(sizeof(struct br_port_msg))
	337	+ nla_total_size(sizeof(__u32));
	338	}
	339
	340	void br_rtr_notify(struct net_device dev, struct net_bridge_port port,
	341	int type)
	342	{
	343	struct net *net = dev_net(dev);
	344	struct sk_buff *skb;
	345	int err = -ENOBUFS;
	346	int ifindex;
	347
	348	ifindex = port ? port->dev->ifindex : 0;
	349	skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
	350	if (!skb)
	351	goto errout;
	352
	353	err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
	354	if (err < 0) {
	355	kfree_skb(skb);
	356	goto errout;
	357	}
	358
	359	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
	360	return;
	361
	362	errout:
363	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
364	}
365
cfd56754 CW	366	static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
	367	{
	368	if (entry->ifindex == 0)
	369	return false;
	370
	371	if (entry->addr.proto == htons(ETH_P_IP)) {
	372	if (!ipv4_is_multicast(entry->addr.u.ip4))
	373	return false;
	374	if (ipv4_is_local_multicast(entry->addr.u.ip4))
	375	return false;
	376	#if IS_ENABLED(CONFIG_IPV6)
	377	} else if (entry->addr.proto == htons(ETH_P_IPV6)) {
3c3769e6	378	if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
cfd56754 CW	379	return false;
	380	#endif
	381	} else
	382	return false;
ccb1c31a AW	383	if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
ccb1c31a AW	384	return false;
74fe61f1 NA	385	if (entry->vid >= VLAN_VID_MASK)
74fe61f1 NA	386	return false;
cfd56754 CW	387
	388	return true;
	389	}
	390
	391	static int br_mdb_parse(struct sk_buff skb, struct nlmsghdr nlh,
	392	struct net_device pdev, struct br_mdb_entry pentry)
	393	{
	394	struct net *net = sock_net(skb->sk);
	395	struct br_mdb_entry *entry;
	396	struct br_port_msg *bpm;
	397	struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
	398	struct net_device *dev;
	399	int err;
	400
12d87251	401	err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
cfd56754 CW	402	if (err < 0)
	403	return err;
	404
	405	bpm = nlmsg_data(nlh);
	406	if (bpm->ifindex == 0) {
	407	pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
	408	return -EINVAL;
	409	}
	410
	411	dev = __dev_get_by_index(net, bpm->ifindex);
	412	if (dev == NULL) {
	413	pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
	414	return -ENODEV;
	415	}
	416
	417	if (!(dev->priv_flags & IFF_EBRIDGE)) {
	418	pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
	419	return -EOPNOTSUPP;
	420	}
	421
	422	*pdev = dev;
	423
	424	if (!tb[MDBA_SET_ENTRY] \|\|
	425	nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
	426	pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
	427	return -EINVAL;
	428	}
	429
	430	entry = nla_data(tb[MDBA_SET_ENTRY]);
	431	if (!is_valid_mdb_entry(entry)) {
	432	pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
	433	return -EINVAL;
	434	}
	435
	436	*pentry = entry;
	437	return 0;
	438	}
	439
	440	static int br_mdb_add_group(struct net_bridge br, struct net_bridge_port port,
9e8430f8 ER	441	struct br_ip *group, unsigned char state,
9e8430f8 ER	442	struct net_bridge_port_group **pg)
cfd56754 CW	443	{
	444	struct net_bridge_mdb_entry *mp;
	445	struct net_bridge_port_group *p;
	446	struct net_bridge_port_group __rcu **pp;
	447	struct net_bridge_mdb_htable *mdb;
f7e2965d	448	unsigned long now = jiffies;
cfd56754 CW	449	int err;
	450
	451	mdb = mlock_dereference(br->mdb, br);
	452	mp = br_mdb_ip_get(mdb, group);
	453	if (!mp) {
	454	mp = br_multicast_new_group(br, port, group);
56bb7fd9 AB	455	err = PTR_ERR_OR_ZERO(mp);
56bb7fd9 AB	456	if (err)
cfd56754 CW	457	return err;
	458	}
	459
	460	for (pp = &mp->ports;
	461	(p = mlock_dereference(*pp, br)) != NULL;
	462	pp = &p->next) {
	463	if (p->port == port)
	464	return -EEXIST;
	465	if ((unsigned long)p->port < (unsigned long)port)
	466	break;
	467	}
	468
ccb1c31a	469	p = br_multicast_new_port_group(port, group, *pp, state);
cfd56754 CW	470	if (unlikely(!p))
	471	return -ENOMEM;
	472	rcu_assign_pointer(*pp, p);
9e8430f8	473	*pg = p;
f7e2965d SA	474	if (state == MDB_TEMPORARY)
f7e2965d SA	475	mod_timer(&p->timer, now + br->multicast_membership_interval);
cfd56754	476
cfd56754 CW	477	return 0;
	478	}
	479
	480	static int __br_mdb_add(struct net net, struct net_bridge br,
9e8430f8 ER	481	struct br_mdb_entry *entry,
9e8430f8 ER	482	struct net_bridge_port_group **pg)
cfd56754 CW	483	{
	484	struct br_ip ip;
	485	struct net_device *dev;
	486	struct net_bridge_port *p;
	487	int ret;
	488
	489	if (!netif_running(br->dev) \|\| br->multicast_disabled)
	490	return -EINVAL;
	491
	492	dev = __dev_get_by_index(net, entry->ifindex);
	493	if (!dev)
	494	return -ENODEV;
	495
	496	p = br_port_get_rtnl(dev);
	497	if (!p \|\| p->br != br \|\| p->state == BR_STATE_DISABLED)
	498	return -EINVAL;
	499
f1158b74	500	memset(&ip, 0, sizeof(ip));
74fe61f1	501	ip.vid = entry->vid;
cfd56754 CW	502	ip.proto = entry->addr.proto;
	503	if (ip.proto == htons(ETH_P_IP))
	504	ip.u.ip4 = entry->addr.u.ip4;
	505	#if IS_ENABLED(CONFIG_IPV6)
	506	else
	507	ip.u.ip6 = entry->addr.u.ip6;
	508	#endif
	509
	510	spin_lock_bh(&br->multicast_lock);
9e8430f8	511	ret = br_mdb_add_group(br, p, &ip, entry->state, pg);
cfd56754 CW	512	spin_unlock_bh(&br->multicast_lock);
	513	return ret;
	514	}
	515
661d2967	516	static int br_mdb_add(struct sk_buff skb, struct nlmsghdr nlh)
cfd56754 CW	517	{
cfd56754 CW	518	struct net *net = sock_net(skb->sk);
9e8430f8	519	struct net_bridge_port_group *pg;
2594e906	520	struct net_bridge_vlan_group *vg;
e44deb2f	521	struct net_device dev, pdev;
cfd56754	522	struct br_mdb_entry *entry;
e44deb2f	523	struct net_bridge_port *p;
2594e906	524	struct net_bridge_vlan *v;
cfd56754 CW	525	struct net_bridge *br;
	526	int err;
	527
	528	err = br_mdb_parse(skb, nlh, &dev, &entry);
	529	if (err < 0)
	530	return err;
	531
	532	br = netdev_priv(dev);
	533
e44deb2f SA	534	/* If vlan filtering is enabled and VLAN is not specified
	535	* install mdb entry on all vlans configured on the port.
	536	*/
	537	pdev = __dev_get_by_index(net, entry->ifindex);
	538	if (!pdev)
	539	return -ENODEV;
	540
	541	p = br_port_get_rtnl(pdev);
	542	if (!p \|\| p->br != br \|\| p->state == BR_STATE_DISABLED)
	543	return -EINVAL;
	544
2594e906 NA	545	vg = nbp_vlan_group(p);
	546	if (br_vlan_enabled(br) && vg && entry->vid == 0) {
	547	list_for_each_entry(v, &vg->vlan_list, vlist) {
	548	entry->vid = v->vid;
9e8430f8	549	err = __br_mdb_add(net, br, entry, &pg);
e44deb2f SA	550	if (err)
e44deb2f SA	551	break;
9e8430f8	552	__br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
e44deb2f SA	553	}
e44deb2f SA	554	} else {
9e8430f8	555	err = __br_mdb_add(net, br, entry, &pg);
e44deb2f	556	if (!err)
9e8430f8	557	__br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
e44deb2f SA	558	}
e44deb2f SA	559
cfd56754 CW	560	return err;
	561	}
	562
	563	static int __br_mdb_del(struct net_bridge br, struct br_mdb_entry entry)
	564	{
	565	struct net_bridge_mdb_htable *mdb;
	566	struct net_bridge_mdb_entry *mp;
	567	struct net_bridge_port_group *p;
	568	struct net_bridge_port_group __rcu **pp;
	569	struct br_ip ip;
	570	int err = -EINVAL;
	571
	572	if (!netif_running(br->dev) \|\| br->multicast_disabled)
	573	return -EINVAL;
	574
f1158b74	575	memset(&ip, 0, sizeof(ip));
74fe61f1	576	ip.vid = entry->vid;
cfd56754	577	ip.proto = entry->addr.proto;
51ed7f3e	578	if (ip.proto == htons(ETH_P_IP))
cfd56754 CW	579	ip.u.ip4 = entry->addr.u.ip4;
cfd56754 CW	580	#if IS_ENABLED(CONFIG_IPV6)
51ed7f3e	581	else
cfd56754 CW	582	ip.u.ip6 = entry->addr.u.ip6;
	583	#endif
	584
	585	spin_lock_bh(&br->multicast_lock);
	586	mdb = mlock_dereference(br->mdb, br);
	587
	588	mp = br_mdb_ip_get(mdb, &ip);
	589	if (!mp)
	590	goto unlock;
	591
	592	for (pp = &mp->ports;
	593	(p = mlock_dereference(*pp, br)) != NULL;
	594	pp = &p->next) {
	595	if (!p->port \|\| p->port->dev->ifindex != entry->ifindex)
	596	continue;
	597
	598	if (p->port->state == BR_STATE_DISABLED)
	599	goto unlock;
	600
9d06b6d8	601	__mdb_entry_fill_flags(entry, p->flags);
cfd56754 CW	602	rcu_assign_pointer(*pp, p->next);
	603	hlist_del_init(&p->mglist);
	604	del_timer(&p->timer);
	605	call_rcu_bh(&p->rcu, br_multicast_free_pg);
	606	err = 0;
	607
454594f3	608	if (!mp->ports && !mp->mglist &&
cfd56754 CW	609	netif_running(br->dev))
	610	mod_timer(&mp->timer, jiffies);
	611	break;
	612	}
	613
	614	unlock:
	615	spin_unlock_bh(&br->multicast_lock);
	616	return err;
	617	}
	618
661d2967	619	static int br_mdb_del(struct sk_buff skb, struct nlmsghdr nlh)
cfd56754	620	{
e44deb2f	621	struct net *net = sock_net(skb->sk);
2594e906	622	struct net_bridge_vlan_group *vg;
e44deb2f	623	struct net_device dev, pdev;
cfd56754	624	struct br_mdb_entry *entry;
e44deb2f	625	struct net_bridge_port *p;
2594e906	626	struct net_bridge_vlan *v;
cfd56754 CW	627	struct net_bridge *br;
	628	int err;
	629
	630	err = br_mdb_parse(skb, nlh, &dev, &entry);
	631	if (err < 0)
	632	return err;
	633
	634	br = netdev_priv(dev);
	635
e44deb2f SA	636	/* If vlan filtering is enabled and VLAN is not specified
	637	* delete mdb entry on all vlans configured on the port.
	638	*/
	639	pdev = __dev_get_by_index(net, entry->ifindex);
	640	if (!pdev)
	641	return -ENODEV;
	642
	643	p = br_port_get_rtnl(pdev);
	644	if (!p \|\| p->br != br \|\| p->state == BR_STATE_DISABLED)
	645	return -EINVAL;
	646
2594e906 NA	647	vg = nbp_vlan_group(p);
	648	if (br_vlan_enabled(br) && vg && entry->vid == 0) {
	649	list_for_each_entry(v, &vg->vlan_list, vlist) {
	650	entry->vid = v->vid;
e44deb2f SA	651	err = __br_mdb_del(br, entry);
e44deb2f SA	652	if (!err)
9e8430f8	653	__br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
e44deb2f SA	654	}
	655	} else {
	656	err = __br_mdb_del(br, entry);
	657	if (!err)
9e8430f8	658	__br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
e44deb2f SA	659	}
e44deb2f SA	660
cfd56754 CW	661	return err;
	662	}
	663
ee07c6e7 CW	664	void br_mdb_init(void)
	665	{
	666	rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
cfd56754 CW	667	rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
cfd56754 CW	668	rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
ee07c6e7	669	}
63233159 VY	670
	671	void br_mdb_uninit(void)
	672	{
	673	rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
	674	rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
	675	rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
	676	}