[deliverable/linux.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, *port_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)
			continue;
		port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT);
		if (!port_nest)
			goto fail;
		if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
		    nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
				br_timer_value(&p->multicast_router_timer)) ||
		    nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
			       p->multicast_router)) {
			nla_nest_cancel(skb, port_nest);
			goto fail;
		}
		nla_nest_end(skb, port_nest);
	}

	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 void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip)
{
	memset(ip, 0, sizeof(struct br_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
}

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;

	__mdb_entry_to_br_ip(entry, &ip);

	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;

	__mdb_entry_to_br_ip(entry, &ip);

	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;
59f78f9f	23	struct nlattr nest, port_nest;
ee07c6e7 CW	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) {
59f78f9f NA	33	if (!p)
	34	continue;
	35	port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT);
	36	if (!port_nest)
ee07c6e7	37	goto fail;
59f78f9f NA	38	if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) \|\|
	39	nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
	40	br_timer_value(&p->multicast_router_timer)) \|\|
	41	nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
	42	p->multicast_router)) {
	43	nla_nest_cancel(skb, port_nest);
	44	goto fail;
	45	}
	46	nla_nest_end(skb, port_nest);
ee07c6e7 CW	47	}
	48
	49	nla_nest_end(skb, nest);
	50	return 0;
	51	fail:
	52	nla_nest_cancel(skb, nest);
	53	return -EMSGSIZE;
	54	}
	55
9d06b6d8 ER	56	static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
	57	{
	58	e->state = flags & MDB_PG_FLAGS_PERMANENT;
	59	e->flags = 0;
	60	if (flags & MDB_PG_FLAGS_OFFLOAD)
	61	e->flags \|= MDB_FLAGS_OFFLOAD;
	62	}
	63
6dd684c0 ER	64	static void __mdb_entry_to_br_ip(struct br_mdb_entry entry, struct br_ip ip)
	65	{
	66	memset(ip, 0, sizeof(struct br_ip));
	67	ip->vid = entry->vid;
	68	ip->proto = entry->addr.proto;
	69	if (ip->proto == htons(ETH_P_IP))
	70	ip->u.ip4 = entry->addr.u.ip4;
	71	#if IS_ENABLED(CONFIG_IPV6)
	72	else
	73	ip->u.ip6 = entry->addr.u.ip6;
	74	#endif
	75	}
	76
ee07c6e7 CW	77	static int br_mdb_fill_info(struct sk_buff skb, struct netlink_callback cb,
	78	struct net_device *dev)
	79	{
	80	struct net_bridge *br = netdev_priv(dev);
	81	struct net_bridge_mdb_htable *mdb;
	82	struct nlattr nest, nest2;
	83	int i, err = 0;
	84	int idx = 0, s_idx = cb->args[1];
	85
	86	if (br->multicast_disabled)
	87	return 0;
	88
	89	mdb = rcu_dereference(br->mdb);
	90	if (!mdb)
	91	return 0;
	92
	93	nest = nla_nest_start(skb, MDBA_MDB);
	94	if (nest == NULL)
	95	return -EMSGSIZE;
	96
	97	for (i = 0; i < mdb->max; i++) {
ee07c6e7	98	struct net_bridge_mdb_entry *mp;
762a3d89	99	struct net_bridge_port_group *p;
762a3d89	100	struct net_bridge_port_group __rcu **pp;
ee07c6e7 CW	101	struct net_bridge_port *port;
ee07c6e7 CW	102
b67bfe0d	103	hlist_for_each_entry_rcu(mp, &mdb->mhash[i], hlist[mdb->ver]) {
ee07c6e7 CW	104	if (idx < s_idx)
	105	goto skip;
	106
	107	nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
	108	if (nest2 == NULL) {
	109	err = -EMSGSIZE;
	110	goto out;
	111	}
	112
	113	for (pp = &mp->ports;
	114	(p = rcu_dereference(*pp)) != NULL;
	115	pp = &p->next) {
21257156	116	struct nlattr *nest_ent;
76cc173d NA	117	struct br_mdb_entry e;
76cc173d NA	118
ee07c6e7	119	port = p->port;
76cc173d NA	120	if (!port)
76cc173d NA	121	continue;
21257156	122
76cc173d NA	123	memset(&e, 0, sizeof(e));
	124	e.ifindex = port->dev->ifindex;
	125	e.vid = p->addr.vid;
	126	__mdb_entry_fill_flags(&e, p->flags);
	127	if (p->addr.proto == htons(ETH_P_IP))
	128	e.addr.u.ip4 = p->addr.u.ip4;
ee07c6e7	129	#if IS_ENABLED(CONFIG_IPV6)
76cc173d NA	130	if (p->addr.proto == htons(ETH_P_IPV6))
76cc173d NA	131	e.addr.u.ip6 = p->addr.u.ip6;
ee07c6e7	132	#endif
76cc173d	133	e.addr.proto = p->addr.proto;
21257156 NA	134	nest_ent = nla_nest_start(skb,
	135	MDBA_MDB_ENTRY_INFO);
	136	if (!nest_ent) {
	137	nla_nest_cancel(skb, nest2);
	138	err = -EMSGSIZE;
	139	goto out;
	140	}
	141	if (nla_put_nohdr(skb, sizeof(e), &e) \|\|
	142	nla_put_u32(skb,
	143	MDBA_MDB_EATTR_TIMER,
	144	br_timer_value(&p->timer))) {
	145	nla_nest_cancel(skb, nest_ent);
76cc173d NA	146	nla_nest_cancel(skb, nest2);
	147	err = -EMSGSIZE;
	148	goto out;
ee07c6e7	149	}
21257156	150	nla_nest_end(skb, nest_ent);
ee07c6e7 CW	151	}
	152	nla_nest_end(skb, nest2);
	153	skip:
	154	idx++;
	155	}
	156	}
	157
	158	out:
	159	cb->args[1] = idx;
	160	nla_nest_end(skb, nest);
	161	return err;
	162	}
	163
	164	static int br_mdb_dump(struct sk_buff skb, struct netlink_callback cb)
	165	{
	166	struct net_device *dev;
	167	struct net *net = sock_net(skb->sk);
	168	struct nlmsghdr *nlh = NULL;
	169	int idx = 0, s_idx;
	170
	171	s_idx = cb->args[0];
	172
	173	rcu_read_lock();
	174
2ce297fc CW	175	/* In theory this could be wrapped to 0... */
2ce297fc CW	176	cb->seq = net->dev_base_seq + br_mdb_rehash_seq;
ee07c6e7 CW	177
	178	for_each_netdev_rcu(net, dev) {
	179	if (dev->priv_flags & IFF_EBRIDGE) {
	180	struct br_port_msg *bpm;
	181
	182	if (idx < s_idx)
	183	goto skip;
	184
	185	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
	186	cb->nlh->nlmsg_seq, RTM_GETMDB,
	187	sizeof(*bpm), NLM_F_MULTI);
	188	if (nlh == NULL)
	189	break;
	190
	191	bpm = nlmsg_data(nlh);
c085c499	192	memset(bpm, 0, sizeof(*bpm));
ee07c6e7 CW	193	bpm->ifindex = dev->ifindex;
	194	if (br_mdb_fill_info(skb, cb, dev) < 0)
	195	goto out;
	196	if (br_rports_fill_info(skb, cb, dev) < 0)
	197	goto out;
	198
	199	cb->args[1] = 0;
	200	nlmsg_end(skb, nlh);
	201	skip:
	202	idx++;
	203	}
	204	}
	205
	206	out:
	207	if (nlh)
	208	nlmsg_end(skb, nlh);
	209	rcu_read_unlock();
	210	cb->args[0] = idx;
	211	return skb->len;
	212	}
	213
37a393bc CW	214	static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
	215	struct net_device *dev,
	216	struct br_mdb_entry *entry, u32 pid,
	217	u32 seq, int type, unsigned int flags)
	218	{
	219	struct nlmsghdr *nlh;
	220	struct br_port_msg *bpm;
	221	struct nlattr nest, nest2;
	222
82199679	223	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
37a393bc CW	224	if (!nlh)
	225	return -EMSGSIZE;
	226
	227	bpm = nlmsg_data(nlh);
c085c499	228	memset(bpm, 0, sizeof(*bpm));
37a393bc CW	229	bpm->family = AF_BRIDGE;
	230	bpm->ifindex = dev->ifindex;
	231	nest = nla_nest_start(skb, MDBA_MDB);
	232	if (nest == NULL)
	233	goto cancel;
	234	nest2 = nla_nest_start(skb, MDBA_MDB_ENTRY);
	235	if (nest2 == NULL)
	236	goto end;
	237
	238	if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
	239	goto end;
	240
	241	nla_nest_end(skb, nest2);
	242	nla_nest_end(skb, nest);
053c095a JB	243	nlmsg_end(skb, nlh);
053c095a JB	244	return 0;
37a393bc CW	245
	246	end:
	247	nla_nest_end(skb, nest);
	248	cancel:
	249	nlmsg_cancel(skb, nlh);
	250	return -EMSGSIZE;
	251	}
	252
	253	static inline size_t rtnl_mdb_nlmsg_size(void)
	254	{
	255	return NLMSG_ALIGN(sizeof(struct br_port_msg))
	256	+ nla_total_size(sizeof(struct br_mdb_entry));
	257	}
	258
	259	static void __br_mdb_notify(struct net_device dev, struct br_mdb_entry entry,
9e8430f8	260	int type, struct net_bridge_port_group *pg)
37a393bc	261	{
f1fecb1d ER	262	struct switchdev_obj_port_mdb mdb = {
	263	.obj = {
	264	.id = SWITCHDEV_OBJ_ID_PORT_MDB,
	265	.flags = SWITCHDEV_F_DEFER,
	266	},
	267	.vid = entry->vid,
	268	};
	269	struct net_device *port_dev;
37a393bc CW	270	struct net *net = dev_net(dev);
	271	struct sk_buff *skb;
	272	int err = -ENOBUFS;
	273
f1fecb1d ER	274	port_dev = __dev_get_by_index(net, entry->ifindex);
	275	if (entry->addr.proto == htons(ETH_P_IP))
	276	ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
	277	#if IS_ENABLED(CONFIG_IPV6)
	278	else
	279	ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
	280	#endif
	281
	282	mdb.obj.orig_dev = port_dev;
9e8430f8 ER	283	if (port_dev && type == RTM_NEWMDB) {
	284	err = switchdev_port_obj_add(port_dev, &mdb.obj);
	285	if (!err && pg)
	286	pg->flags \|= MDB_PG_FLAGS_OFFLOAD;
	287	} else if (port_dev && type == RTM_DELMDB) {
f1fecb1d	288	switchdev_port_obj_del(port_dev, &mdb.obj);
9e8430f8	289	}
f1fecb1d	290
37a393bc CW	291	skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
	292	if (!skb)
	293	goto errout;
	294
	295	err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
	296	if (err < 0) {
	297	kfree_skb(skb);
	298	goto errout;
	299	}
	300
	301	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
	302	return;
	303	errout:
	304	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
	305	}
	306
9e8430f8 ER	307	void br_mdb_notify(struct net_device dev, struct net_bridge_port_group pg,
9e8430f8 ER	308	int type)
37a393bc CW	309	{
	310	struct br_mdb_entry entry;
	311
c085c499	312	memset(&entry, 0, sizeof(entry));
9e8430f8 ER	313	entry.ifindex = pg->port->dev->ifindex;
	314	entry.addr.proto = pg->addr.proto;
	315	entry.addr.u.ip4 = pg->addr.u.ip4;
37a393bc	316	#if IS_ENABLED(CONFIG_IPV6)
9e8430f8	317	entry.addr.u.ip6 = pg->addr.u.ip6;
37a393bc	318	#endif
9e8430f8 ER	319	entry.vid = pg->addr.vid;
	320	__mdb_entry_fill_flags(&entry, pg->flags);
	321	__br_mdb_notify(dev, &entry, type, pg);
37a393bc CW	322	}
37a393bc CW	323
949f1e39 SA	324	static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
	325	struct net_device *dev,
	326	int ifindex, u32 pid,
	327	u32 seq, int type, unsigned int flags)
	328	{
	329	struct br_port_msg *bpm;
	330	struct nlmsghdr *nlh;
	331	struct nlattr *nest;
	332
	333	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
	334	if (!nlh)
	335	return -EMSGSIZE;
	336
	337	bpm = nlmsg_data(nlh);
	338	memset(bpm, 0, sizeof(*bpm));
	339	bpm->family = AF_BRIDGE;
	340	bpm->ifindex = dev->ifindex;
	341	nest = nla_nest_start(skb, MDBA_ROUTER);
	342	if (!nest)
	343	goto cancel;
	344
	345	if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
	346	goto end;
	347
	348	nla_nest_end(skb, nest);
	349	nlmsg_end(skb, nlh);
	350	return 0;
	351
	352	end:
	353	nla_nest_end(skb, nest);
	354	cancel:
	355	nlmsg_cancel(skb, nlh);
	356	return -EMSGSIZE;
	357	}
	358
	359	static inline size_t rtnl_rtr_nlmsg_size(void)
	360	{
	361	return NLMSG_ALIGN(sizeof(struct br_port_msg))
	362	+ nla_total_size(sizeof(__u32));
	363	}
	364
	365	void br_rtr_notify(struct net_device dev, struct net_bridge_port port,
	366	int type)
	367	{
	368	struct net *net = dev_net(dev);
	369	struct sk_buff *skb;
	370	int err = -ENOBUFS;
	371	int ifindex;
	372
	373	ifindex = port ? port->dev->ifindex : 0;
	374	skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
	375	if (!skb)
	376	goto errout;
	377
	378	err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 0, 0, type, NTF_SELF);
	379	if (err < 0) {
	380	kfree_skb(skb);
	381	goto errout;
	382	}
	383
	384	rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
	385	return;
	386
	387	errout:
388	rtnl_set_sk_err(net, RTNLGRP_MDB, err);
389	}
390
cfd56754 CW	391	static bool is_valid_mdb_entry(struct br_mdb_entry *entry)
	392	{
	393	if (entry->ifindex == 0)
	394	return false;
	395
	396	if (entry->addr.proto == htons(ETH_P_IP)) {
	397	if (!ipv4_is_multicast(entry->addr.u.ip4))
	398	return false;
	399	if (ipv4_is_local_multicast(entry->addr.u.ip4))
	400	return false;
	401	#if IS_ENABLED(CONFIG_IPV6)
	402	} else if (entry->addr.proto == htons(ETH_P_IPV6)) {
3c3769e6	403	if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
cfd56754 CW	404	return false;
	405	#endif
	406	} else
	407	return false;
ccb1c31a AW	408	if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
ccb1c31a AW	409	return false;
74fe61f1 NA	410	if (entry->vid >= VLAN_VID_MASK)
74fe61f1 NA	411	return false;
cfd56754 CW	412
	413	return true;
	414	}
	415
	416	static int br_mdb_parse(struct sk_buff skb, struct nlmsghdr nlh,
	417	struct net_device pdev, struct br_mdb_entry pentry)
	418	{
	419	struct net *net = sock_net(skb->sk);
	420	struct br_mdb_entry *entry;
	421	struct br_port_msg *bpm;
	422	struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
	423	struct net_device *dev;
	424	int err;
	425
12d87251	426	err = nlmsg_parse(nlh, sizeof(*bpm), tb, MDBA_SET_ENTRY_MAX, NULL);
cfd56754 CW	427	if (err < 0)
	428	return err;
	429
	430	bpm = nlmsg_data(nlh);
	431	if (bpm->ifindex == 0) {
	432	pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
	433	return -EINVAL;
	434	}
	435
	436	dev = __dev_get_by_index(net, bpm->ifindex);
	437	if (dev == NULL) {
	438	pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
	439	return -ENODEV;
	440	}
	441
	442	if (!(dev->priv_flags & IFF_EBRIDGE)) {
	443	pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
	444	return -EOPNOTSUPP;
	445	}
	446
	447	*pdev = dev;
	448
	449	if (!tb[MDBA_SET_ENTRY] \|\|
	450	nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
	451	pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
	452	return -EINVAL;
	453	}
	454
	455	entry = nla_data(tb[MDBA_SET_ENTRY]);
	456	if (!is_valid_mdb_entry(entry)) {
	457	pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
	458	return -EINVAL;
	459	}
	460
	461	*pentry = entry;
	462	return 0;
	463	}
	464
	465	static int br_mdb_add_group(struct net_bridge br, struct net_bridge_port port,
9e8430f8 ER	466	struct br_ip *group, unsigned char state,
9e8430f8 ER	467	struct net_bridge_port_group **pg)
cfd56754 CW	468	{
	469	struct net_bridge_mdb_entry *mp;
	470	struct net_bridge_port_group *p;
	471	struct net_bridge_port_group __rcu **pp;
	472	struct net_bridge_mdb_htable *mdb;
f7e2965d	473	unsigned long now = jiffies;
cfd56754 CW	474	int err;
	475
	476	mdb = mlock_dereference(br->mdb, br);
	477	mp = br_mdb_ip_get(mdb, group);
	478	if (!mp) {
	479	mp = br_multicast_new_group(br, port, group);
56bb7fd9 AB	480	err = PTR_ERR_OR_ZERO(mp);
56bb7fd9 AB	481	if (err)
cfd56754 CW	482	return err;
	483	}
	484
	485	for (pp = &mp->ports;
	486	(p = mlock_dereference(*pp, br)) != NULL;
	487	pp = &p->next) {
	488	if (p->port == port)
	489	return -EEXIST;
	490	if ((unsigned long)p->port < (unsigned long)port)
	491	break;
	492	}
	493
ccb1c31a	494	p = br_multicast_new_port_group(port, group, *pp, state);
cfd56754 CW	495	if (unlikely(!p))
	496	return -ENOMEM;
	497	rcu_assign_pointer(*pp, p);
9e8430f8	498	*pg = p;
f7e2965d SA	499	if (state == MDB_TEMPORARY)
f7e2965d SA	500	mod_timer(&p->timer, now + br->multicast_membership_interval);
cfd56754	501
cfd56754 CW	502	return 0;
	503	}
	504
	505	static int __br_mdb_add(struct net net, struct net_bridge br,
9e8430f8 ER	506	struct br_mdb_entry *entry,
9e8430f8 ER	507	struct net_bridge_port_group **pg)
cfd56754 CW	508	{
	509	struct br_ip ip;
	510	struct net_device *dev;
	511	struct net_bridge_port *p;
	512	int ret;
	513
	514	if (!netif_running(br->dev) \|\| br->multicast_disabled)
	515	return -EINVAL;
	516
	517	dev = __dev_get_by_index(net, entry->ifindex);
	518	if (!dev)
	519	return -ENODEV;
	520
	521	p = br_port_get_rtnl(dev);
	522	if (!p \|\| p->br != br \|\| p->state == BR_STATE_DISABLED)
	523	return -EINVAL;
	524
6dd684c0	525	__mdb_entry_to_br_ip(entry, &ip);
cfd56754 CW	526
cfd56754 CW	527	spin_lock_bh(&br->multicast_lock);
9e8430f8	528	ret = br_mdb_add_group(br, p, &ip, entry->state, pg);
cfd56754 CW	529	spin_unlock_bh(&br->multicast_lock);
	530	return ret;
	531	}
	532
661d2967	533	static int br_mdb_add(struct sk_buff skb, struct nlmsghdr nlh)
cfd56754 CW	534	{
cfd56754 CW	535	struct net *net = sock_net(skb->sk);
9e8430f8	536	struct net_bridge_port_group *pg;
2594e906	537	struct net_bridge_vlan_group *vg;
e44deb2f	538	struct net_device dev, pdev;
cfd56754	539	struct br_mdb_entry *entry;
e44deb2f	540	struct net_bridge_port *p;
2594e906	541	struct net_bridge_vlan *v;
cfd56754 CW	542	struct net_bridge *br;
	543	int err;
	544
	545	err = br_mdb_parse(skb, nlh, &dev, &entry);
	546	if (err < 0)
	547	return err;
	548
	549	br = netdev_priv(dev);
	550
e44deb2f SA	551	/* If vlan filtering is enabled and VLAN is not specified
	552	* install mdb entry on all vlans configured on the port.
	553	*/
	554	pdev = __dev_get_by_index(net, entry->ifindex);
	555	if (!pdev)
	556	return -ENODEV;
	557
	558	p = br_port_get_rtnl(pdev);
	559	if (!p \|\| p->br != br \|\| p->state == BR_STATE_DISABLED)
	560	return -EINVAL;
	561
2594e906 NA	562	vg = nbp_vlan_group(p);
	563	if (br_vlan_enabled(br) && vg && entry->vid == 0) {
	564	list_for_each_entry(v, &vg->vlan_list, vlist) {
	565	entry->vid = v->vid;
9e8430f8	566	err = __br_mdb_add(net, br, entry, &pg);
e44deb2f SA	567	if (err)
e44deb2f SA	568	break;
9e8430f8	569	__br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
e44deb2f SA	570	}
e44deb2f SA	571	} else {
9e8430f8	572	err = __br_mdb_add(net, br, entry, &pg);
e44deb2f	573	if (!err)
9e8430f8	574	__br_mdb_notify(dev, entry, RTM_NEWMDB, pg);
e44deb2f SA	575	}
e44deb2f SA	576
cfd56754 CW	577	return err;
	578	}
	579
	580	static int __br_mdb_del(struct net_bridge br, struct br_mdb_entry entry)
	581	{
	582	struct net_bridge_mdb_htable *mdb;
	583	struct net_bridge_mdb_entry *mp;
	584	struct net_bridge_port_group *p;
	585	struct net_bridge_port_group __rcu **pp;
	586	struct br_ip ip;
	587	int err = -EINVAL;
	588
	589	if (!netif_running(br->dev) \|\| br->multicast_disabled)
	590	return -EINVAL;
	591
6dd684c0	592	__mdb_entry_to_br_ip(entry, &ip);
cfd56754 CW	593
	594	spin_lock_bh(&br->multicast_lock);
	595	mdb = mlock_dereference(br->mdb, br);
	596
	597	mp = br_mdb_ip_get(mdb, &ip);
	598	if (!mp)
	599	goto unlock;
	600
	601	for (pp = &mp->ports;
	602	(p = mlock_dereference(*pp, br)) != NULL;
	603	pp = &p->next) {
	604	if (!p->port \|\| p->port->dev->ifindex != entry->ifindex)
	605	continue;
	606
	607	if (p->port->state == BR_STATE_DISABLED)
	608	goto unlock;
	609
9d06b6d8	610	__mdb_entry_fill_flags(entry, p->flags);
cfd56754 CW	611	rcu_assign_pointer(*pp, p->next);
	612	hlist_del_init(&p->mglist);
	613	del_timer(&p->timer);
	614	call_rcu_bh(&p->rcu, br_multicast_free_pg);
	615	err = 0;
	616
454594f3	617	if (!mp->ports && !mp->mglist &&
cfd56754 CW	618	netif_running(br->dev))
	619	mod_timer(&mp->timer, jiffies);
	620	break;
	621	}
	622
	623	unlock:
	624	spin_unlock_bh(&br->multicast_lock);
	625	return err;
	626	}
	627
661d2967	628	static int br_mdb_del(struct sk_buff skb, struct nlmsghdr nlh)
cfd56754	629	{
e44deb2f	630	struct net *net = sock_net(skb->sk);
2594e906	631	struct net_bridge_vlan_group *vg;
e44deb2f	632	struct net_device dev, pdev;
cfd56754	633	struct br_mdb_entry *entry;
e44deb2f	634	struct net_bridge_port *p;
2594e906	635	struct net_bridge_vlan *v;
cfd56754 CW	636	struct net_bridge *br;
	637	int err;
	638
	639	err = br_mdb_parse(skb, nlh, &dev, &entry);
	640	if (err < 0)
	641	return err;
	642
	643	br = netdev_priv(dev);
	644
e44deb2f SA	645	/* If vlan filtering is enabled and VLAN is not specified
	646	* delete mdb entry on all vlans configured on the port.
	647	*/
	648	pdev = __dev_get_by_index(net, entry->ifindex);
	649	if (!pdev)
	650	return -ENODEV;
	651
	652	p = br_port_get_rtnl(pdev);
	653	if (!p \|\| p->br != br \|\| p->state == BR_STATE_DISABLED)
	654	return -EINVAL;
	655
2594e906 NA	656	vg = nbp_vlan_group(p);
	657	if (br_vlan_enabled(br) && vg && entry->vid == 0) {
	658	list_for_each_entry(v, &vg->vlan_list, vlist) {
	659	entry->vid = v->vid;
e44deb2f SA	660	err = __br_mdb_del(br, entry);
e44deb2f SA	661	if (!err)
9e8430f8	662	__br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
e44deb2f SA	663	}
	664	} else {
	665	err = __br_mdb_del(br, entry);
	666	if (!err)
9e8430f8	667	__br_mdb_notify(dev, entry, RTM_DELMDB, NULL);
e44deb2f SA	668	}
e44deb2f SA	669
cfd56754 CW	670	return err;
	671	}
	672
ee07c6e7 CW	673	void br_mdb_init(void)
	674	{
	675	rtnl_register(PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, NULL);
cfd56754 CW	676	rtnl_register(PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, NULL);
cfd56754 CW	677	rtnl_register(PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, NULL);
ee07c6e7	678	}
63233159 VY	679
	680	void br_mdb_uninit(void)
	681	{
	682	rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
	683	rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
	684	rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
	685	}