[GitHub/mt8127/android_kernel_alcatel_ttab.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 */
		+ 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)))
		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:
	if (err < 0)
		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);

	/* not a bridge port and  */
	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 >= VLAN_N_VID)
			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);

			if (err)
				break;

			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 ifla_brport_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 },
};

/* 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;

	p->state = 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;

	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);

	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;
	}
	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 brigde
	 */
	if (!p && !afspec)
		return -EINVAL;

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

			spin_lock_bh(&p->br->lock);
			err = br_setport(p, tb);
			spin_unlock_bh(&p->br->lock);
		} else {
			/* Binary compatability 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 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,
	.validate	= br_validate,
	.newlink	= br_dev_newlink,
	.dellink	= br_dev_delete,
};

int __init br_netlink_init(void)
{
	int err;

	br_mdb_init();
	err = rtnl_af_register(&br_af_ops);
	if (err)
		goto out;

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

	return 0;

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

void __exit 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 */
25c71c75	33	+ 0;
	34	}
	35
339bf98f TG	36	static inline size_t br_nlmsg_size(void)
	37	{
	38	return NLMSG_ALIGN(sizeof(struct ifinfomsg))
25c71c75	39	+ nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
	40	+ nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
	41	+ nla_total_size(4) /* IFLA_MASTER */
	42	+ nla_total_size(4) /* IFLA_MTU */
	43	+ nla_total_size(4) /* IFLA_LINK */
	44	+ nla_total_size(1) /* IFLA_OPERSTATE */
	45	+ nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */
	46	}
	47
	48	static int br_port_fill_attrs(struct sk_buff *skb,
	49	const struct net_bridge_port *p)
	50	{
	51	u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
	52
	53	if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) \|\|
	54	nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) \|\|
	55	nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) \|\|
a2e01a65	56	nla_put_u8(skb, IFLA_BRPORT_MODE, mode) \|\|
1007dd1a	57	nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) \|\|
c2d3babf DM	58	nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) \|\|
c2d3babf DM	59	nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)))
25c71c75	60	return -EMSGSIZE;
	61
	62	return 0;
339bf98f TG	63	}
339bf98f TG	64
11dc1f36 SH	65	/*
	66	* Create one netlink message for one interface
	67	* Contains port and master info as well as carrier and bridge state.
	68	*/
6cbdceeb VY	69	static int br_fill_ifinfo(struct sk_buff *skb,
	70	const struct net_bridge_port *port,
	71	u32 pid, u32 seq, int event, unsigned int flags,
	72	u32 filter_mask, const struct net_device *dev)
11dc1f36	73	{
6cbdceeb	74	const struct net_bridge *br;
74685962	75	struct ifinfomsg *hdr;
11dc1f36	76	struct nlmsghdr *nlh;
11dc1f36	77	u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
11dc1f36	78
6cbdceeb VY	79	if (port)
	80	br = port->br;
	81	else
	82	br = netdev_priv(dev);
	83
28a16c97	84	br_debug(br, "br_fill_info event %d port %s master %s\n",
28a16c97	85	event, dev->name, br->dev->name);
11dc1f36	86
74685962 TG	87	nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
74685962 TG	88	if (nlh == NULL)
26932566	89	return -EMSGSIZE;
11dc1f36	90
74685962 TG	91	hdr = nlmsg_data(nlh);
	92	hdr->ifi_family = AF_BRIDGE;
	93	hdr->__ifi_pad = 0;
	94	hdr->ifi_type = dev->type;
	95	hdr->ifi_index = dev->ifindex;
	96	hdr->ifi_flags = dev_get_flags(dev);
	97	hdr->ifi_change = 0;
11dc1f36	98
2eb812e6 DM	99	if (nla_put_string(skb, IFLA_IFNAME, dev->name) \|\|
	100	nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) \|\|
	101	nla_put_u32(skb, IFLA_MTU, dev->mtu) \|\|
	102	nla_put_u8(skb, IFLA_OPERSTATE, operstate) \|\|
	103	(dev->addr_len &&
	104	nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) \|\|
	105	(dev->ifindex != dev->iflink &&
25c71c75	106	nla_put_u32(skb, IFLA_LINK, dev->iflink)))
2eb812e6	107	goto nla_put_failure;
25c71c75	108
6cbdceeb	109	if (event == RTM_NEWLINK && port) {
25c71c75	110	struct nlattr *nest
	111	= nla_nest_start(skb, IFLA_PROTINFO \| NLA_F_NESTED);
	112
	113	if (nest == NULL \|\| br_port_fill_attrs(skb, port) < 0)
	114	goto nla_put_failure;
	115	nla_nest_end(skb, nest);
	116	}
	117
6cbdceeb VY	118	/* Check if the VID information is requested */
	119	if (filter_mask & RTEXT_FILTER_BRVLAN) {
	120	struct nlattr *af;
	121	const struct net_port_vlans *pv;
	122	struct bridge_vlan_info vinfo;
	123	u16 vid;
552406c4	124	u16 pvid;
6cbdceeb VY	125
	126	if (port)
	127	pv = nbp_get_vlan_info(port);
	128	else
	129	pv = br_get_vlan_info(br);
	130
9f0bd377	131	if (!pv \|\| bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
6cbdceeb VY	132	goto done;
	133
	134	af = nla_nest_start(skb, IFLA_AF_SPEC);
	135	if (!af)
	136	goto nla_put_failure;
	137
552406c4	138	pvid = br_get_pvid(pv);
9f0bd377	139	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
6cbdceeb VY	140	vinfo.vid = vid;
6cbdceeb VY	141	vinfo.flags = 0;
552406c4 VY	142	if (vid == pvid)
552406c4 VY	143	vinfo.flags \|= BRIDGE_VLAN_INFO_PVID;
35e03f3a VY	144
	145	if (test_bit(vid, pv->untagged_bitmap))
	146	vinfo.flags \|= BRIDGE_VLAN_INFO_UNTAGGED;
	147
6cbdceeb VY	148	if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
	149	sizeof(vinfo), &vinfo))
	150	goto nla_put_failure;
	151	}
	152
	153	nla_nest_end(skb, af);
	154	}
	155
	156	done:
74685962	157	return nlmsg_end(skb, nlh);
11dc1f36	158
74685962	159	nla_put_failure:
26932566 PM	160	nlmsg_cancel(skb, nlh);
26932566 PM	161	return -EMSGSIZE;
11dc1f36 SH	162	}
	163
	164	/*
	165	* Notify listeners of a change in port information
	166	*/
	167	void br_ifinfo_notify(int event, struct net_bridge_port *port)
	168	{
407af329	169	struct net *net;
11dc1f36	170	struct sk_buff *skb;
280a306c	171	int err = -ENOBUFS;
11dc1f36	172
407af329 VY	173	if (!port)
	174	return;
	175
	176	net = dev_net(port->dev);
28a16c97	177	br_debug(port->br, "port %u(%s) event %d\n",
95c96174	178	(unsigned int)port->port_no, port->dev->name, event);
28a16c97	179
339bf98f	180	skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
280a306c TG	181	if (skb == NULL)
	182	goto errout;
	183
6cbdceeb	184	err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev);
26932566 PM	185	if (err < 0) {
	186	/* -EMSGSIZE implies BUG in br_nlmsg_size() */
	187	WARN_ON(err == -EMSGSIZE);
	188	kfree_skb(skb);
	189	goto errout;
	190	}
1ce85fe4 PNA	191	rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
1ce85fe4 PNA	192	return;
280a306c	193	errout:
bea1b42e	194	if (err < 0)
4aa678ba	195	rtnl_set_sk_err(net, RTNLGRP_LINK, err);
11dc1f36 SH	196	}
11dc1f36 SH	197
407af329	198
11dc1f36 SH	199	/*
	200	* Dump information about all ports, in response to GETLINK
	201	*/
e5a55a89	202	int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
6cbdceeb	203	struct net_device *dev, u32 filter_mask)
11dc1f36	204	{
e5a55a89	205	int err = 0;
97ddc3e1	206	struct net_bridge_port *port = br_port_get_rtnl(dev);
e5a55a89	207
6cbdceeb VY	208	/* not a bridge port and */
6cbdceeb VY	209	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN))
e5a55a89	210	goto out;
11dc1f36	211
6cbdceeb VY	212	err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI,
6cbdceeb VY	213	filter_mask, dev);
e5a55a89 JF	214	out:
e5a55a89 JF	215	return err;
11dc1f36 SH	216	}
11dc1f36 SH	217
15004cab	218	static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = {
407af329 VY	219	[IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 },
	220	[IFLA_BRIDGE_MODE] = { .type = NLA_U16 },
	221	[IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY,
	222	.len = sizeof(struct bridge_vlan_info), },
	223	};
	224
	225	static int br_afspec(struct net_bridge *br,
	226	struct net_bridge_port *p,
	227	struct nlattr *af_spec,
	228	int cmd)
	229	{
	230	struct nlattr *tb[IFLA_BRIDGE_MAX+1];
	231	int err = 0;
	232
	233	err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy);
	234	if (err)
	235	return err;
	236
	237	if (tb[IFLA_BRIDGE_VLAN_INFO]) {
	238	struct bridge_vlan_info *vinfo;
	239
	240	vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]);
	241
	242	if (vinfo->vid >= VLAN_N_VID)
	243	return -EINVAL;
	244
	245	switch (cmd) {
	246	case RTM_SETLINK:
	247	if (p) {
552406c4	248	err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
407af329 VY	249	if (err)
	250	break;
	251
	252	if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
552406c4 VY	253	err = br_vlan_add(p->br, vinfo->vid,
552406c4 VY	254	vinfo->flags);
407af329	255	} else
552406c4	256	err = br_vlan_add(br, vinfo->vid, vinfo->flags);
407af329 VY	257
	258	if (err)
	259	break;
	260
	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
25c71c75	277	static const struct nla_policy ifla_brport_policy[IFLA_BRPORT_MAX + 1] = {
	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 },
25c71c75	284	};
	285
	286	/* Change the state of the port and notify spanning tree */
	287	static int br_set_port_state(struct net_bridge_port *p, u8 state)
	288	{
	289	if (state > BR_STATE_BLOCKING)
	290	return -EINVAL;
	291
	292	/* if kernel STP is running, don't allow changes */
	293	if (p->br->stp_enabled == BR_KERNEL_STP)
	294	return -EBUSY;
	295
576eb625	296	/* if device is not up, change is not allowed
	297	* if link is not present, only allowable state is disabled
	298	*/
25c71c75	299	if (!netif_running(p->dev) \|\|
576eb625	300	(!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
25c71c75	301	return -ENETDOWN;
	302
	303	p->state = state;
	304	br_log_state(p);
	305	br_port_state_selection(p->br);
	306	return 0;
	307	}
	308
	309	/* Set/clear or port flags based on attribute */
	310	static void br_set_port_flag(struct net_bridge_port p, struct nlattr tb[],
	311	int attrtype, unsigned long mask)
	312	{
	313	if (tb[attrtype]) {
	314	u8 flag = nla_get_u8(tb[attrtype]);
	315	if (flag)
	316	p->flags \|= mask;
	317	else
	318	p->flags &= ~mask;
	319	}
	320	}
	321
	322	/* Process bridge protocol info on port */
	323	static int br_setport(struct net_bridge_port p, struct nlattr tb[])
	324	{
	325	int err;
	326
	327	br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
a2e01a65	328	br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
c2d3babf	329	br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
3d84fa98	330	br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
25c71c75	331
	332	if (tb[IFLA_BRPORT_COST]) {
	333	err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
	334	if (err)
	335	return err;
	336	}
	337
	338	if (tb[IFLA_BRPORT_PRIORITY]) {
	339	err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
	340	if (err)
	341	return err;
	342	}
	343
	344	if (tb[IFLA_BRPORT_STATE]) {
	345	err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
	346	if (err)
	347	return err;
	348	}
	349	return 0;
	350	}
	351
	352	/* Change state and parameters on port. */
e5a55a89	353	int br_setlink(struct net_device dev, struct nlmsghdr nlh)
11dc1f36	354	{
74685962	355	struct nlattr *protinfo;
407af329	356	struct nlattr *afspec;
11dc1f36	357	struct net_bridge_port *p;
2062cc20	358	struct nlattr *tb[IFLA_BRPORT_MAX + 1];
7b99a993	359	int err = 0;
11dc1f36	360
c60ee67f H	361	protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
c60ee67f H	362	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329	363	if (!protinfo && !afspec)
25c71c75	364	return 0;
11dc1f36	365
ec1e5610	366	p = br_port_get_rtnl(dev);
407af329 VY	367	/* We want to accept dev as bridge itself if the AF_SPEC
	368	* is set to see if someone is setting vlan info on the brigde
	369	*/
7b99a993	370	if (!p && !afspec)
b5ed54e9	371	return -EINVAL;
11dc1f36	372
407af329 VY	373	if (p && protinfo) {
	374	if (protinfo->nla_type & NLA_F_NESTED) {
	375	err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
	376	protinfo, ifla_brport_policy);
	377	if (err)
	378	return err;
	379
	380	spin_lock_bh(&p->br->lock);
	381	err = br_setport(p, tb);
	382	spin_unlock_bh(&p->br->lock);
	383	} else {
	384	/* Binary compatability with old RSTP */
	385	if (nla_len(protinfo) < sizeof(u8))
	386	return -EINVAL;
	387
	388	spin_lock_bh(&p->br->lock);
	389	err = br_set_port_state(p, nla_get_u8(protinfo));
	390	spin_unlock_bh(&p->br->lock);
	391	}
25c71c75	392	if (err)
407af329 VY	393	goto out;
407af329 VY	394	}
11dc1f36	395
407af329 VY	396	if (afspec) {
	397	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
	398	afspec, RTM_SETLINK);
25c71c75	399	}
b03b6dd5	400
25c71c75	401	if (err == 0)
25c71c75	402	br_ifinfo_notify(RTM_NEWLINK, p);
b03b6dd5	403
407af329	404	out:
25c71c75	405	return err;
11dc1f36 SH	406	}
11dc1f36 SH	407
407af329 VY	408	/* Delete port information */
	409	int br_dellink(struct net_device dev, struct nlmsghdr nlh)
	410	{
407af329 VY	411	struct nlattr *afspec;
	412	struct net_bridge_port *p;
	413	int err;
	414
c60ee67f	415	afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
407af329 VY	416	if (!afspec)
	417	return 0;
	418
	419	p = br_port_get_rtnl(dev);
	420	/* We want to accept dev as bridge itself as well */
	421	if (!p && !(dev->priv_flags & IFF_EBRIDGE))
	422	return -EINVAL;
	423
	424	err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
	425	afspec, RTM_DELLINK);
	426
	427	return err;
	428	}
bb900b27	429	static int br_validate(struct nlattr tb[], struct nlattr data[])
	430	{
	431	if (tb[IFLA_ADDRESS]) {
	432	if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
	433	return -EINVAL;
	434	if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
	435	return -EADDRNOTAVAIL;
	436	}
	437
	438	return 0;
	439	}
	440
28ad29fc TM	441	static int br_dev_newlink(struct net src_net, struct net_device dev,
	442	struct nlattr tb[], struct nlattr data[])
	443	{
	444	struct net_bridge *br = netdev_priv(dev);
	445
	446	if (tb[IFLA_ADDRESS]) {
	447	spin_lock_bh(&br->lock);
	448	br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
	449	spin_unlock_bh(&br->lock);
	450	}
	451
	452	return register_netdevice(dev);
	453	}
	454
6cbdceeb VY	455	static size_t br_get_link_af_size(const struct net_device *dev)
	456	{
	457	struct net_port_vlans *pv;
	458
	459	if (br_port_exists(dev))
97ddc3e1	460	pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
6cbdceeb VY	461	else if (dev->priv_flags & IFF_EBRIDGE)
	462	pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
	463	else
	464	return 0;
	465
	466	if (!pv)
	467	return 0;
	468
	469	/* Each VLAN is returned in bridge_vlan_info along with flags */
	470	return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
	471	}
	472
15004cab	473	static struct rtnl_af_ops br_af_ops = {
6cbdceeb VY	474	.family = AF_BRIDGE,
	475	.get_link_af_size = br_get_link_af_size,
	476	};
	477
149ddd83	478	struct rtnl_link_ops br_link_ops __read_mostly = {
bb900b27	479	.kind = "bridge",
	480	.priv_size = sizeof(struct net_bridge),
	481	.setup = br_dev_setup,
	482	.validate = br_validate,
28ad29fc	483	.newlink = br_dev_newlink,
1ce5cce8	484	.dellink = br_dev_delete,
bb900b27	485	};
11dc1f36	486
32fe21c0	487	int __init br_netlink_init(void)
11dc1f36	488	{
3ec8e9f0 VY	489	int err;
	490
	491	br_mdb_init();
6cbdceeb	492	err = rtnl_af_register(&br_af_ops);
3ec8e9f0 VY	493	if (err)
	494	goto out;
	495
6cbdceeb VY	496	err = rtnl_link_register(&br_link_ops);
	497	if (err)
	498	goto out_af;
	499
3ec8e9f0	500	return 0;
6cbdceeb VY	501
	502	out_af:
	503	rtnl_af_unregister(&br_af_ops);
3ec8e9f0 VY	504	out:
	505	br_mdb_uninit();
	506	return err;
11dc1f36 SH	507	}
	508
	509	void __exit br_netlink_fini(void)
	510	{
3ec8e9f0	511	br_mdb_uninit();
6cbdceeb	512	rtnl_af_unregister(&br_af_ops);
bb900b27	513	rtnl_link_unregister(&br_link_ops);
11dc1f36	514	}