[deliverable/linux.git] / net / bridge / br_netlink.c

/*
 *	Bridge netlink control interface
 *
 *	Authors:
 *	Stephen Hemminger		<shemminger@osdl.org>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/etherdevice.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <uapi/linux/if_bridge.h>

#include "br_private.h"
#include "br_private_stp.h"

static inline size_t br_port_info_size(void)
{
	return nla_total_size(1)	/* IFLA_BRPORT_STATE  */
		+ nla_total_size(2)	/* IFLA_BRPORT_PRIORITY */
		+ nla_total_size(4)	/* IFLA_BRPORT_COST */
		+ nla_total_size(1)	/* IFLA_BRPORT_MODE */
		+ nla_total_size(1)	/* IFLA_BRPORT_GUARD */
		+ nla_total_size(1)	/* IFLA_BRPORT_PROTECT */
		+ nla_total_size(1)	/* IFLA_BRPORT_FAST_LEAVE */
		+ nla_total_size(1)	/* IFLA_BRPORT_LEARNING */
		+ nla_total_size(1)	/* IFLA_BRPORT_UNICAST_FLOOD */
		+ 0;
}

static inline size_t br_nlmsg_size(void)
{
	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
		+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
		+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
		+ nla_total_size(4) /* IFLA_MASTER */
		+ nla_total_size(4) /* IFLA_MTU */
		+ nla_total_size(4) /* IFLA_LINK */
		+ nla_total_size(1) /* IFLA_OPERSTATE */
		+ nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */
}

static int br_port_fill_attrs(struct sk_buff *skb,
			      const struct net_bridge_port *p)
{
	u8 mode = !!(p->flags & BR_HAIRPIN_MODE);

	if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
	    nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
	    nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
	    nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
	    nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
	    nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
	    nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
	    nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
	    nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
	    nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)))
		return -EMSGSIZE;

	return 0;
}

/*
 * Create one netlink message for one interface
 * Contains port and master info as well as carrier and bridge state.
 */
static int br_fill_ifinfo(struct sk_buff *skb,
			  const struct net_bridge_port *port,
			  u32 pid, u32 seq, int event, unsigned int flags,
			  u32 filter_mask, const struct net_device *dev)
{
	const struct net_bridge *br;
	struct ifinfomsg *hdr;
	struct nlmsghdr *nlh;
	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;

	if (port)
		br = port->br;
	else
		br = netdev_priv(dev);

	br_debug(br, "br_fill_info event %d port %s master %s\n",
		     event, dev->name, br->dev->name);

	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
	if (nlh == NULL)
		return -EMSGSIZE;

	hdr = nlmsg_data(nlh);
	hdr->ifi_family = AF_BRIDGE;
	hdr->__ifi_pad = 0;
	hdr->ifi_type = dev->type;
	hdr->ifi_index = dev->ifindex;
	hdr->ifi_flags = dev_get_flags(dev);
	hdr->ifi_change = 0;

	if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
	    nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) ||
	    nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
	    nla_put_u8(skb, IFLA_OPERSTATE, operstate) ||
	    (dev->addr_len &&
	     nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
	    (dev->ifindex != dev->iflink &&
	     nla_put_u32(skb, IFLA_LINK, dev->iflink)))
		goto nla_put_failure;

	if (event == RTM_NEWLINK && port) {
		struct nlattr *nest
			= nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);

		if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
			goto nla_put_failure;
		nla_nest_end(skb, nest);
	}

	/* Check if  the VID information is requested */
	if (filter_mask & RTEXT_FILTER_BRVLAN) {
		struct nlattr *af;
		const struct net_port_vlans *pv;
		struct bridge_vlan_info vinfo;
		u16 vid;
		u16 pvid;

		if (port)
			pv = nbp_get_vlan_info(port);
		else
			pv = br_get_vlan_info(br);

		if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
			goto done;

		af = nla_nest_start(skb, IFLA_AF_SPEC);
		if (!af)
			goto nla_put_failure;

		pvid = br_get_pvid(pv);
		for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
			vinfo.vid = vid;
			vinfo.flags = 0;
			if (vid == pvid)
				vinfo.flags |= BRIDGE_VLAN_INFO_PVID;

			if (test_bit(vid, pv->untagged_bitmap))
				vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;

			if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
				    sizeof(vinfo), &vinfo))
				goto nla_put_failure;
		}

		nla_nest_end(skb, af);
	}

done:
	return nlmsg_end(skb, nlh);

nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

/*
 * Notify listeners of a change in port information
 */
void br_ifinfo_notify(int event, struct net_bridge_port *port)
{
	struct net *net;
	struct sk_buff *skb;
	int err = -ENOBUFS;

	if (!port)
		return;

	net = dev_net(port->dev);
	br_debug(port->br, "port %u(%s) event %d\n",
		 (unsigned int)port->port_no, port->dev->name, event);

	skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
	if (skb == NULL)
		goto errout;

	err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
	if (err < 0) {
		/* -EMSGSIZE implies BUG in br_nlmsg_size() */
		WARN_ON(err == -EMSGSIZE);
		kfree_skb(skb);
		goto errout;
	}
	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
	return;
errout:
	rtnl_set_sk_err(net, RTNLGRP_LINK, err);
}


/*
 * Dump information about all ports, in response to GETLINK
 */
int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
	       struct net_device *dev, u32 filter_mask)
{
	int err = 0;
	struct net_bridge_port *port = br_port_get_rtnl(dev);

	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
		goto out;

	err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
			     filter_mask, dev);
out:
	return err;
}

static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = {
	[IFLA_BRIDGE_FLAGS]	= { .type = NLA_U16 },
	[IFLA_BRIDGE_MODE]	= { .type = NLA_U16 },
	[IFLA_BRIDGE_VLAN_INFO]	= { .type = NLA_BINARY,
				    .len = sizeof(struct bridge_vlan_info), },
};

static int br_afspec(struct net_bridge *br,
		     struct net_bridge_port *p,
		     struct nlattr *af_spec,
		     int cmd)
{
	struct nlattr *tb[IFLA_BRIDGE_MAX+1];
	int err = 0;

	err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy);
	if (err)
		return err;

	if (tb[IFLA_BRIDGE_VLAN_INFO]) {
		struct bridge_vlan_info *vinfo;

		vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]);

		if (!vinfo->vid || vinfo->vid >= VLAN_VID_MASK)
			return -EINVAL;

		switch (cmd) {
		case RTM_SETLINK:
			if (p) {
				err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
				if (err)
					break;

				if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
					err = br_vlan_add(p->br, vinfo->vid,
							  vinfo->flags);
			} else
				err = br_vlan_add(br, vinfo->vid, vinfo->flags);

			break;

		case RTM_DELLINK:
			if (p) {
				nbp_vlan_delete(p, vinfo->vid);
				if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
					br_vlan_delete(p->br, vinfo->vid);
			} else
				br_vlan_delete(br, vinfo->vid);
			break;
		}
	}

	return err;
}

static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
	[IFLA_BRPORT_STATE]	= { .type = NLA_U8 },
	[IFLA_BRPORT_COST]	= { .type = NLA_U32 },
	[IFLA_BRPORT_PRIORITY]	= { .type = NLA_U16 },
	[IFLA_BRPORT_MODE]	= { .type = NLA_U8 },
	[IFLA_BRPORT_GUARD]	= { .type = NLA_U8 },
	[IFLA_BRPORT_PROTECT]	= { .type = NLA_U8 },
	[IFLA_BRPORT_LEARNING]	= { .type = NLA_U8 },
	[IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
};

/* Change the state of the port and notify spanning tree */
static int br_set_port_state(struct net_bridge_port *p, u8 state)
{
	if (state > BR_STATE_BLOCKING)
		return -EINVAL;

	/* if kernel STP is running, don't allow changes */
	if (p->br->stp_enabled == BR_KERNEL_STP)
		return -EBUSY;

	/* if device is not up, change is not allowed
	 * if link is not present, only allowable state is disabled
	 */
	if (!netif_running(p->dev) ||
	    (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
		return -ENETDOWN;

	br_set_state(p, state);
	br_log_state(p);
	br_port_state_selection(p->br);
	return 0;
}

/* Set/clear or port flags based on attribute */
static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
			   int attrtype, unsigned long mask)
{
	if (tb[attrtype]) {
		u8 flag = nla_get_u8(tb[attrtype]);
		if (flag)
			p->flags |= mask;
		else
			p->flags &= ~mask;
	}
}

/* Process bridge protocol info on port */
static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
{
	int err;
	unsigned long old_flags = p->flags;

	br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
	br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
	br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
	br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
	br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
	br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);

	if (tb[IFLA_BRPORT_COST]) {
		err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
		if (err)
			return err;
	}

	if (tb[IFLA_BRPORT_PRIORITY]) {
		err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
		if (err)
			return err;
	}

	if (tb[IFLA_BRPORT_STATE]) {
		err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
		if (err)
			return err;
	}

	br_port_flags_change(p, old_flags ^ p->flags);
	return 0;
}

/* Change state and parameters on port. */
int br_setlink(struct net_device *dev, struct nlmsghdr *nlh)
{
	struct nlattr *protinfo;
	struct nlattr *afspec;
	struct net_bridge_port *p;
	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
	int err = 0;

	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
	if (!protinfo && !afspec)
		return 0;

	p = br_port_get_rtnl(dev);
	/* We want to accept dev as bridge itself if the AF_SPEC
	 * is set to see if someone is setting vlan info on the bridge
	 */
	if (!p && !afspec)
		return -EINVAL;

	if (p && protinfo) {
		if (protinfo->nla_type & NLA_F_NESTED) {
			err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
					       protinfo, br_port_policy);
			if (err)
				return err;

			spin_lock_bh(&p->br->lock);
			err = br_setport(p, tb);
			spin_unlock_bh(&p->br->lock);
		} else {
			/* Binary compatibility with old RSTP */
			if (nla_len(protinfo) < sizeof(u8))
				return -EINVAL;

			spin_lock_bh(&p->br->lock);
			err = br_set_port_state(p, nla_get_u8(protinfo));
			spin_unlock_bh(&p->br->lock);
		}
		if (err)
			goto out;
	}

	if (afspec) {
		err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
				afspec, RTM_SETLINK);
	}

	if (err == 0)
		br_ifinfo_notify(RTM_NEWLINK, p);

out:
	return err;
}

/* Delete port information */
int br_dellink(struct net_device *dev, struct nlmsghdr *nlh)
{
	struct nlattr *afspec;
	struct net_bridge_port *p;
	int err;

	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
	if (!afspec)
		return 0;

	p = br_port_get_rtnl(dev);
	/* We want to accept dev as bridge itself as well */
	if (!p && !(dev->priv_flags & IFF_EBRIDGE))
		return -EINVAL;

	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
			afspec, RTM_DELLINK);

	return err;
}
static int br_validate(struct nlattr *tb[], struct nlattr *data[])
{
	if (tb[IFLA_ADDRESS]) {
		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
			return -EINVAL;
		if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
			return -EADDRNOTAVAIL;
	}

	return 0;
}

static int br_dev_newlink(struct net *src_net, struct net_device *dev,
			  struct nlattr *tb[], struct nlattr *data[])
{
	struct net_bridge *br = netdev_priv(dev);

	if (tb[IFLA_ADDRESS]) {
		spin_lock_bh(&br->lock);
		br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
		spin_unlock_bh(&br->lock);
	}

	return register_netdevice(dev);
}

static int br_port_slave_changelink(struct net_device *brdev,
				    struct net_device *dev,
				    struct nlattr *tb[],
				    struct nlattr *data[])
{
	if (!data)
		return 0;
	return br_setport(br_port_get_rtnl(dev), data);
}

static int br_port_fill_slave_info(struct sk_buff *skb,
				   const struct net_device *brdev,
				   const struct net_device *dev)
{
	return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
}

static size_t br_port_get_slave_size(const struct net_device *brdev,
				     const struct net_device *dev)
{
	return br_port_info_size();
}

static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
	[IFLA_BR_FORWARD_DELAY]	= { .type = NLA_U32 },
	[IFLA_BR_HELLO_TIME]	= { .type = NLA_U32 },
	[IFLA_BR_MAX_AGE]	= { .type = NLA_U32 },
};

static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
			 struct nlattr *data[])
{
	struct net_bridge *br = netdev_priv(brdev);
	int err;

	if (!data)
		return 0;

	if (data[IFLA_BR_FORWARD_DELAY]) {
		err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
		if (err)
			return err;
	}

	if (data[IFLA_BR_HELLO_TIME]) {
		err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
		if (err)
			return err;
	}

	if (data[IFLA_BR_MAX_AGE]) {
		err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
		if (err)
			return err;
	}

	return 0;
}

static size_t br_get_size(const struct net_device *brdev)
{
	return nla_total_size(sizeof(u32)) +	/* IFLA_BR_FORWARD_DELAY  */
	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_HELLO_TIME */
	       nla_total_size(sizeof(u32)) +	/* IFLA_BR_MAX_AGE */
	       0;
}

static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
{
	struct net_bridge *br = netdev_priv(brdev);
	u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
	u32 hello_time = jiffies_to_clock_t(br->hello_time);
	u32 age_time = jiffies_to_clock_t(br->max_age);

	if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
	    nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
	    nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time))
		return -EMSGSIZE;

	return 0;
}

static size_t br_get_link_af_size(const struct net_device *dev)
{
	struct net_port_vlans *pv;

	if (br_port_exists(dev))
		pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
	else if (dev->priv_flags & IFF_EBRIDGE)
		pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
	else
		return 0;

	if (!pv)
		return 0;

	/* Each VLAN is returned in bridge_vlan_info along with flags */
	return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
}

static struct rtnl_af_ops br_af_ops = {
	.family			= AF_BRIDGE,
	.get_link_af_size	= br_get_link_af_size,
};

struct rtnl_link_ops br_link_ops __read_mostly = {
	.kind			= "bridge",
	.priv_size		= sizeof(struct net_bridge),
	.setup			= br_dev_setup,
	.maxtype		= IFLA_BRPORT_MAX,
	.policy			= br_policy,
	.validate		= br_validate,
	.newlink		= br_dev_newlink,
	.changelink		= br_changelink,
	.dellink		= br_dev_delete,
	.get_size		= br_get_size,
	.fill_info		= br_fill_info,

	.slave_maxtype		= IFLA_BRPORT_MAX,
	.slave_policy		= br_port_policy,
	.slave_changelink	= br_port_slave_changelink,
	.get_slave_size		= br_port_get_slave_size,
	.fill_slave_info	= br_port_fill_slave_info,
};

int __init br_netlink_init(void)
{
	int err;

	br_mdb_init();
	rtnl_af_register(&br_af_ops);

	err = rtnl_link_register(&br_link_ops);
	if (err)
		goto out_af;

	return 0;

out_af:
	rtnl_af_unregister(&br_af_ops);
	br_mdb_uninit();
	return err;
}

void br_netlink_fini(void)
{
	br_mdb_uninit();
	rtnl_af_unregister(&br_af_ops);
	rtnl_link_unregister(&br_link_ops);
}
Commit	Line	Data
11dc1f36 SH	1	/*
	2	* Bridge netlink control interface
	3	*
	4	* Authors:
	5	* Stephen Hemminger <shemminger@osdl.org>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version
	10	* 2 of the License, or (at your option) any later version.
	11	*/
	12
	13	#include <linux/kernel.h>
5a0e3ad6	14	#include <linux/slab.h>
bb900b27	15	#include <linux/etherdevice.h>
32fe21c0	16	#include <net/rtnetlink.h>
881d966b	17	#include <net/net_namespace.h>
b854272b	18	#include <net/sock.h>
407af329	19	#include <uapi/linux/if_bridge.h>
bb900b27	20
11dc1f36	21	#include "br_private.h"
b03b6dd5	22	#include "br_private_stp.h"
11dc1f36	23
25c71c75	24	static inline size_t br_port_info_size(void)
	25	{
	26	return nla_total_size(1) /* IFLA_BRPORT_STATE */
	27	+ nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
	28	+ nla_total_size(4) /* IFLA_BRPORT_COST */
	29	+ nla_total_size(1) /* IFLA_BRPORT_MODE */
a2e01a65	30	+ nla_total_size(1) /* IFLA_BRPORT_GUARD */
1007dd1a	31	+ nla_total_size(1) /* IFLA_BRPORT_PROTECT */
3da889b6	32	+ nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
9ba18891	33	+ nla_total_size(1) /* IFLA_BRPORT_LEARNING */
867a5943	34	+ nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
25c71c75	35	+ 0;
	36	}
	37
339bf98f TG	38	static inline size_t br_nlmsg_size(void)
	39	{
	40	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
25c71c75	41	+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
	42	+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
	43	+ nla_total_size(4) /* IFLA_MASTER */
	44	+ nla_total_size(4) /* IFLA_MTU */
	45	+ nla_total_size(4) /* IFLA_LINK */
	46	+ nla_total_size(1) /* IFLA_OPERSTATE */
	47	+ nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */
	48	}
	49
	50	static int br_port_fill_attrs(struct sk_buff *skb,
	51	const struct net_bridge_port *p)
	52	{
	53	u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
	54
	55	if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) \|\|
	56	nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) \|\|
	57	nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) \|\|
a2e01a65	58	nla_put_u8(skb, IFLA_BRPORT_MODE, mode) \|\|
1007dd1a	59	nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) \|\|
c2d3babf	60	nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) \|\|
9ba18891	61	nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) \|\|
867a5943	62	nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) \|\|
95850116 KP	63	nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) \|\|
95850116 KP	64	nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)))
25c71c75	65	return -EMSGSIZE;
	66
	67	return 0;
339bf98f TG	68	}
339bf98f TG	69
11dc1f36 SH	70	/*
	71	* Create one netlink message for one interface
	72	* Contains port and master info as well as carrier and bridge state.
	73	*/
6cbdceeb VY	74	static int br_fill_ifinfo(struct sk_buff *skb,
	75	const struct net_bridge_port *port,
	76	u32 pid, u32 seq, int event, unsigned int flags,
	77	u32 filter_mask, const struct net_device *dev)
11dc1f36	78	{
6cbdceeb	79	const struct net_bridge *br;
74685962	80	struct ifinfomsg *hdr;
11dc1f36	81	struct nlmsghdr *nlh;
11dc1f36	82	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
11dc1f36	83
6cbdceeb VY	84	if (port)
	85	br = port->br;
	86	else
	87	br = netdev_priv(dev);
	88
28a16c97	89	br_debug(br, "br_fill_info event %d port %s master %s\n",
28a16c97	90	event, dev->name, br->dev->name);
11dc1f36	91
74685962 TG	92	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
74685962 TG	93	if (nlh == NULL)
26932566	94	return -EMSGSIZE;
11dc1f36	95
74685962 TG	96	hdr = nlmsg_data(nlh);
	97	hdr->ifi_family = AF_BRIDGE;
	98	hdr->__ifi_pad = 0;
	99	hdr->ifi_type = dev->type;
	100	hdr->ifi_index = dev->ifindex;
	101	hdr->ifi_flags = dev_get_flags(dev);
	102	hdr->ifi_change = 0;
11dc1f36	103
2eb812e6 DM	104	if (nla_put_string(skb, IFLA_IFNAME, dev->name) \|\|
	105	nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) \|\|
	106	nla_put_u32(skb, IFLA_MTU, dev->mtu) \|\|
	107	nla_put_u8(skb, IFLA_OPERSTATE, operstate) \|\|
	108	(dev->addr_len &&
	109	nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) \|\|
	110	(dev->ifindex != dev->iflink &&
25c71c75	111	nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2eb812e6	112	goto nla_put_failure;
25c71c75	113
6cbdceeb	114	if (event == RTM_NEWLINK && port) {
25c71c75	115	struct nlattr *nest
	116	= nla_nest_start(skb, IFLA_PROTINFO \| NLA_F_NESTED);
	117
	118	if (nest == NULL \|\| br_port_fill_attrs(skb, port) < 0)
	119	goto nla_put_failure;
	120	nla_nest_end(skb, nest);
	121	}
	122
6cbdceeb VY	123	/* Check if the VID information is requested */
	124	if (filter_mask & RTEXT_FILTER_BRVLAN) {
	125	struct nlattr *af;
	126	const struct net_port_vlans *pv;
	127	struct bridge_vlan_info vinfo;
	128	u16 vid;
552406c4	129	u16 pvid;
6cbdceeb VY	130
	131	if (port)
	132	pv = nbp_get_vlan_info(port);
	133	else
	134	pv = br_get_vlan_info(br);
	135
ef40b7ef	136	if (!pv \|\| bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
6cbdceeb VY	137	goto done;
	138
	139	af = nla_nest_start(skb, IFLA_AF_SPEC);
	140	if (!af)
	141	goto nla_put_failure;
	142
552406c4	143	pvid = br_get_pvid(pv);
ef40b7ef	144	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
6cbdceeb VY	145	vinfo.vid = vid;
6cbdceeb VY	146	vinfo.flags = 0;
552406c4 VY	147	if (vid == pvid)
552406c4 VY	148	vinfo.flags \|= BRIDGE_VLAN_INFO_PVID;
35e03f3a VY	149
	150	if (test_bit(vid, pv->untagged_bitmap))
	151	vinfo.flags \|= BRIDGE_VLAN_INFO_UNTAGGED;
	152
6cbdceeb VY	153	if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
	154	sizeof(vinfo), &vinfo))
	155	goto nla_put_failure;
	156	}
	157
	158	nla_nest_end(skb, af);
	159	}
	160
	161	done:
74685962	162	return nlmsg_end(skb, nlh);
11dc1f36	163
74685962	164	nla_put_failure:
26932566 PM	165	nlmsg_cancel(skb, nlh);
26932566 PM	166	return -EMSGSIZE;
11dc1f36 SH	167	}
	168
	169	/*
	170	* Notify listeners of a change in port information
	171	*/
	172	void br_ifinfo_notify(int event, struct net_bridge_port *port)
	173	{
407af329	174	struct net *net;
11dc1f36	175	struct sk_buff *skb;
280a306c	176	int err = -ENOBUFS;
11dc1f36	177
407af329 VY	178	if (!port)
	179	return;
	180
	181	net = dev_net(port->dev);
28a16c97	182	br_debug(port->br, "port %u(%s) event %d\n",
95c96174	183	(unsigned int)port->port_no, port->dev->name, event);
28a16c97	184
339bf98f	185	skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
280a306c TG	186	if (skb == NULL)
	187	goto errout;
	188
6cbdceeb	189	err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
26932566 PM	190	if (err < 0) {
	191	/* -EMSGSIZE implies BUG in br_nlmsg_size() */
	192	WARN_ON(err == -EMSGSIZE);
	193	kfree_skb(skb);
	194	goto errout;
	195	}
1ce85fe4 PNA	196	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
1ce85fe4 PNA	197	return;
280a306c	198	errout:
87e823b3	199	rtnl_set_sk_err(net, RTNLGRP_LINK, err);
11dc1f36 SH	200	}
11dc1f36 SH	201
407af329	202
11dc1f36 SH	203	/*
	204	* Dump information about all ports, in response to GETLINK
	205	*/
e5a55a89	206	int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
6cbdceeb	207	struct net_device *dev, u32 filter_mask)
11dc1f36	208	{
e5a55a89	209	int err = 0;
1fb1754a	210	struct net_bridge_port *port = br_port_get_rtnl(dev);
e5a55a89	211
6cbdceeb	212	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
e5a55a89	213	goto out;
11dc1f36	214
6cbdceeb VY	215	err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
6cbdceeb VY	216	filter_mask, dev);
e5a55a89 JF	217	out:
e5a55a89 JF	218	return err;
11dc1f36 SH	219	}
11dc1f36 SH	220
15004cab	221	static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = {
407af329 VY	222	[IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 },
	223	[IFLA_BRIDGE_MODE] = { .type = NLA_U16 },
	224	[IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY,
	225	.len = sizeof(struct bridge_vlan_info), },
	226	};
	227
	228	static int br_afspec(struct net_bridge *br,
	229	struct net_bridge_port *p,
	230	struct nlattr *af_spec,
	231	int cmd)
	232	{
	233	struct nlattr *tb[IFLA_BRIDGE_MAX+1];
	234	int err = 0;
	235
	236	err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy);
	237	if (err)
	238	return err;
	239
	240	if (tb[IFLA_BRIDGE_VLAN_INFO]) {
	241	struct bridge_vlan_info *vinfo;
	242
	243	vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]);
	244
8adff41c	245	if (!vinfo->vid \|\| vinfo->vid >= VLAN_VID_MASK)
407af329 VY	246	return -EINVAL;
	247
	248	switch (cmd) {
	249	case RTM_SETLINK:
	250	if (p) {
552406c4	251	err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
407af329 VY	252	if (err)
	253	break;
	254
	255	if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
552406c4 VY	256	err = br_vlan_add(p->br, vinfo->vid,
552406c4 VY	257	vinfo->flags);
407af329	258	} else
552406c4	259	err = br_vlan_add(br, vinfo->vid, vinfo->flags);
407af329	260
407af329 VY	261	break;
	262
	263	case RTM_DELLINK:
	264	if (p) {
	265	nbp_vlan_delete(p, vinfo->vid);
	266	if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
	267	br_vlan_delete(p->br, vinfo->vid);
	268	} else
	269	br_vlan_delete(br, vinfo->vid);
	270	break;
	271	}
	272	}
	273
	274	return err;
	275	}
	276
3ac636b8	277	static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
25c71c75	278	[IFLA_BRPORT_STATE] = { .type = NLA_U8 },
	279	[IFLA_BRPORT_COST] = { .type = NLA_U32 },
	280	[IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
	281	[IFLA_BRPORT_MODE] = { .type = NLA_U8 },
a2e01a65	282	[IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
1007dd1a	283	[IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
9ba18891	284	[IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
867a5943	285	[IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
25c71c75	286	};
	287
	288	/* Change the state of the port and notify spanning tree */
	289	static int br_set_port_state(struct net_bridge_port *p, u8 state)
	290	{
	291	if (state > BR_STATE_BLOCKING)
	292	return -EINVAL;
	293
	294	/* if kernel STP is running, don't allow changes */
	295	if (p->br->stp_enabled == BR_KERNEL_STP)
	296	return -EBUSY;
	297
576eb625	298	/* if device is not up, change is not allowed
	299	* if link is not present, only allowable state is disabled
	300	*/
25c71c75	301	if (!netif_running(p->dev) \|\|
576eb625	302	(!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
25c71c75	303	return -ENETDOWN;
25c71c75	304
775dd692	305	br_set_state(p, state);
25c71c75	306	br_log_state(p);
	307	br_port_state_selection(p->br);
	308	return 0;
	309	}
	310
	311	/* Set/clear or port flags based on attribute */
	312	static void br_set_port_flag(struct net_bridge_port p, struct nlattr tb[],
	313	int attrtype, unsigned long mask)
	314	{
	315	if (tb[attrtype]) {
	316	u8 flag = nla_get_u8(tb[attrtype]);
	317	if (flag)
	318	p->flags \|= mask;
	319	else
	320	p->flags &= ~mask;
	321	}
	322	}
	323
	324	/* Process bridge protocol info on port */
	325	static int br_setport(struct net_bridge_port p, struct nlattr tb[])
	326	{
	327	int err;
e028e4b8	328	unsigned long old_flags = p->flags;
25c71c75	329
25c71c75	330	br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
a2e01a65	331	br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
c2d3babf	332	br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
3d84fa98	333	br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
9ba18891	334	br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
867a5943	335	br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
95850116	336	br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
25c71c75	337
	338	if (tb[IFLA_BRPORT_COST]) {
	339	err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
	340	if (err)
	341	return err;
	342	}
	343
	344	if (tb[IFLA_BRPORT_PRIORITY]) {
	345	err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
	346	if (err)
	347	return err;
	348	}
	349
	350	if (tb[IFLA_BRPORT_STATE]) {
	351	err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
	352	if (err)
	353	return err;
	354	}
e028e4b8 VY	355
e028e4b8 VY	356	br_port_flags_change(p, old_flags ^ p->flags);
25c71c75	357	return 0;
	358	}
	359
	360	/* Change state and parameters on port. */
e5a55a89	361	int br_setlink(struct net_device dev, struct nlmsghdr nlh)
11dc1f36	362	{
74685962	363	struct nlattr *protinfo;
407af329	364	struct nlattr *afspec;
11dc1f36	365	struct net_bridge_port *p;
2062cc20	366	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
7b99a993	367	int err = 0;
11dc1f36	368
c60ee67f H	369	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
c60ee67f H	370	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329	371	if (!protinfo && !afspec)
25c71c75	372	return 0;
11dc1f36	373
ec1e5610	374	p = br_port_get_rtnl(dev);
407af329	375	/* We want to accept dev as bridge itself if the AF_SPEC
8e3bff96	376	* is set to see if someone is setting vlan info on the bridge
407af329	377	*/
7b99a993	378	if (!p && !afspec)
b5ed54e9	379	return -EINVAL;
11dc1f36	380
407af329 VY	381	if (p && protinfo) {
	382	if (protinfo->nla_type & NLA_F_NESTED) {
	383	err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
3ac636b8	384	protinfo, br_port_policy);
407af329 VY	385	if (err)
	386	return err;
	387
	388	spin_lock_bh(&p->br->lock);
	389	err = br_setport(p, tb);
	390	spin_unlock_bh(&p->br->lock);
	391	} else {
8e3bff96	392	/* Binary compatibility with old RSTP */
407af329 VY	393	if (nla_len(protinfo) < sizeof(u8))
	394	return -EINVAL;
	395
	396	spin_lock_bh(&p->br->lock);
	397	err = br_set_port_state(p, nla_get_u8(protinfo));
	398	spin_unlock_bh(&p->br->lock);
	399	}
25c71c75	400	if (err)
407af329 VY	401	goto out;
407af329 VY	402	}
11dc1f36	403
407af329 VY	404	if (afspec) {
	405	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
	406	afspec, RTM_SETLINK);
25c71c75	407	}
b03b6dd5	408
25c71c75	409	if (err == 0)
25c71c75	410	br_ifinfo_notify(RTM_NEWLINK, p);
b03b6dd5	411
407af329	412	out:
25c71c75	413	return err;
11dc1f36 SH	414	}
11dc1f36 SH	415
407af329 VY	416	/* Delete port information */
	417	int br_dellink(struct net_device dev, struct nlmsghdr nlh)
	418	{
407af329 VY	419	struct nlattr *afspec;
	420	struct net_bridge_port *p;
	421	int err;
	422
c60ee67f	423	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329 VY	424	if (!afspec)
	425	return 0;
	426
	427	p = br_port_get_rtnl(dev);
	428	/* We want to accept dev as bridge itself as well */
	429	if (!p && !(dev->priv_flags & IFF_EBRIDGE))
	430	return -EINVAL;
	431
	432	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
	433	afspec, RTM_DELLINK);
	434
	435	return err;
	436	}
bb900b27	437	static int br_validate(struct nlattr tb[], struct nlattr data[])
	438	{
	439	if (tb[IFLA_ADDRESS]) {
	440	if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
	441	return -EINVAL;
	442	if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
	443	return -EADDRNOTAVAIL;
	444	}
	445
	446	return 0;
	447	}
	448
30313a3d TM	449	static int br_dev_newlink(struct net src_net, struct net_device dev,
	450	struct nlattr tb[], struct nlattr data[])
	451	{
	452	struct net_bridge *br = netdev_priv(dev);
	453
	454	if (tb[IFLA_ADDRESS]) {
	455	spin_lock_bh(&br->lock);
	456	br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
	457	spin_unlock_bh(&br->lock);
	458	}
	459
	460	return register_netdevice(dev);
	461	}
	462
3ac636b8 JP	463	static int br_port_slave_changelink(struct net_device *brdev,
	464	struct net_device *dev,
	465	struct nlattr *tb[],
	466	struct nlattr *data[])
	467	{
	468	if (!data)
	469	return 0;
	470	return br_setport(br_port_get_rtnl(dev), data);
	471	}
	472
ced8283f JP	473	static int br_port_fill_slave_info(struct sk_buff *skb,
	474	const struct net_device *brdev,
	475	const struct net_device *dev)
	476	{
	477	return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
	478	}
	479
	480	static size_t br_port_get_slave_size(const struct net_device *brdev,
	481	const struct net_device *dev)
	482	{
	483	return br_port_info_size();
	484	}
	485
13323516 JP	486	static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
	487	[IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
	488	[IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
	489	[IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
	490	};
	491
	492	static int br_changelink(struct net_device brdev, struct nlattr tb[],
	493	struct nlattr *data[])
	494	{
	495	struct net_bridge *br = netdev_priv(brdev);
	496	int err;
	497
	498	if (!data)
	499	return 0;
	500
	501	if (data[IFLA_BR_FORWARD_DELAY]) {
	502	err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
	503	if (err)
	504	return err;
	505	}
	506
	507	if (data[IFLA_BR_HELLO_TIME]) {
	508	err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
	509	if (err)
	510	return err;
	511	}
	512
	513	if (data[IFLA_BR_MAX_AGE]) {
	514	err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
	515	if (err)
	516	return err;
	517	}
	518
	519	return 0;
	520	}
	521
e5c3ea5c JP	522	static size_t br_get_size(const struct net_device *brdev)
	523	{
	524	return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
	525	nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
	526	nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
	527	0;
	528	}
	529
	530	static int br_fill_info(struct sk_buff skb, const struct net_device brdev)
	531	{
	532	struct net_bridge *br = netdev_priv(brdev);
	533	u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
	534	u32 hello_time = jiffies_to_clock_t(br->hello_time);
	535	u32 age_time = jiffies_to_clock_t(br->max_age);
	536
	537	if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) \|\|
	538	nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) \|\|
	539	nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time))
	540	return -EMSGSIZE;
	541
	542	return 0;
	543	}
	544
6cbdceeb VY	545	static size_t br_get_link_af_size(const struct net_device *dev)
	546	{
	547	struct net_port_vlans *pv;
	548
	549	if (br_port_exists(dev))
1fb1754a	550	pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
6cbdceeb VY	551	else if (dev->priv_flags & IFF_EBRIDGE)
	552	pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
	553	else
	554	return 0;
	555
	556	if (!pv)
	557	return 0;
	558
	559	/* Each VLAN is returned in bridge_vlan_info along with flags */
	560	return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
	561	}
	562
15004cab	563	static struct rtnl_af_ops br_af_ops = {
6cbdceeb VY	564	.family = AF_BRIDGE,
	565	.get_link_af_size = br_get_link_af_size,
	566	};
	567
149ddd83	568	struct rtnl_link_ops br_link_ops __read_mostly = {
ced8283f JP	569	.kind = "bridge",
	570	.priv_size = sizeof(struct net_bridge),
	571	.setup = br_dev_setup,
13323516 JP	572	.maxtype = IFLA_BRPORT_MAX,
13323516 JP	573	.policy = br_policy,
ced8283f JP	574	.validate = br_validate,
ced8283f JP	575	.newlink = br_dev_newlink,
13323516	576	.changelink = br_changelink,
ced8283f	577	.dellink = br_dev_delete,
e5c3ea5c JP	578	.get_size = br_get_size,
e5c3ea5c JP	579	.fill_info = br_fill_info,
3ac636b8 JP	580
	581	.slave_maxtype = IFLA_BRPORT_MAX,
	582	.slave_policy = br_port_policy,
	583	.slave_changelink = br_port_slave_changelink,
ced8283f JP	584	.get_slave_size = br_port_get_slave_size,
ced8283f JP	585	.fill_slave_info = br_port_fill_slave_info,
bb900b27	586	};
11dc1f36	587
32fe21c0	588	int __init br_netlink_init(void)
11dc1f36	589	{
3ec8e9f0 VY	590	int err;
	591
	592	br_mdb_init();
3678a9d8	593	rtnl_af_register(&br_af_ops);
3ec8e9f0	594
6cbdceeb VY	595	err = rtnl_link_register(&br_link_ops);
	596	if (err)
	597	goto out_af;
	598
3ec8e9f0	599	return 0;
6cbdceeb VY	600
	601	out_af:
	602	rtnl_af_unregister(&br_af_ops);
3ec8e9f0 VY	603	br_mdb_uninit();
3ec8e9f0 VY	604	return err;
11dc1f36 SH	605	}
11dc1f36 SH	606
34666d46	607	void br_netlink_fini(void)
11dc1f36	608	{
3ec8e9f0	609	br_mdb_uninit();
6cbdceeb	610	rtnl_af_unregister(&br_af_ops);
bb900b27	611	rtnl_link_unregister(&br_link_ops);
11dc1f36	612	}