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

/*
 *	Ioctl handler
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.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/capability.h>
#include <linux/kernel.h>
#include <linux/if_bridge.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/times.h>
#include <net/net_namespace.h>
#include <asm/uaccess.h>
#include "br_private.h"

/* called with RTNL */
static int get_bridge_ifindices(struct net *net, int *indices, int num)
{
	struct net_device *dev;
	int i = 0;

	for_each_netdev(net, dev) {
		if (i >= num)
			break;
		if (dev->priv_flags & IFF_EBRIDGE)
			indices[i++] = dev->ifindex;
	}

	return i;
}

/* called with RTNL */
static void get_port_ifindices(struct net_bridge *br, int *ifindices, int num)
{
	struct net_bridge_port *p;

	list_for_each_entry(p, &br->port_list, list) {
		if (p->port_no < num)
			ifindices[p->port_no] = p->dev->ifindex;
	}
}

/*
 * Format up to a page worth of forwarding table entries
 * userbuf -- where to copy result
 * maxnum  -- maximum number of entries desired
 *            (limited to a page for sanity)
 * offset  -- number of records to skip
 */
static int get_fdb_entries(struct net_bridge *br, void __user *userbuf,
			   unsigned long maxnum, unsigned long offset)
{
	int num;
	void *buf;
	size_t size;

	/* Clamp size to PAGE_SIZE, test maxnum to avoid overflow */
	if (maxnum > PAGE_SIZE/sizeof(struct __fdb_entry))
		maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);

	size = maxnum * sizeof(struct __fdb_entry);

	buf = kmalloc(size, GFP_USER);
	if (!buf)
		return -ENOMEM;

	num = br_fdb_fillbuf(br, buf, maxnum, offset);
	if (num > 0) {
		if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry)))
			num = -EFAULT;
	}
	kfree(buf);

	return num;
}

/* called with RTNL */
static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
{
	struct net *net = dev_net(br->dev);
	struct net_device *dev;
	int ret;

	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
		return -EPERM;

	dev = __dev_get_by_index(net, ifindex);
	if (dev == NULL)
		return -EINVAL;

	if (isadd)
		ret = br_add_if(br, dev);
	else
		ret = br_del_if(br, dev);

	return ret;
}

/*
 * Legacy ioctl's through SIOCDEVPRIVATE
 * This interface is deprecated because it was too difficult to
 * to do the translation for 32/64bit ioctl compatibility.
 */
static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct net_bridge *br = netdev_priv(dev);
	struct net_bridge_port *p = NULL;
	unsigned long args[4];
	int ret = -EOPNOTSUPP;

	if (copy_from_user(args, rq->ifr_data, sizeof(args)))
		return -EFAULT;

	switch (args[0]) {
	case BRCTL_ADD_IF:
	case BRCTL_DEL_IF:
		return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF);

	case BRCTL_GET_BRIDGE_INFO:
	{
		struct __bridge_info b;

		memset(&b, 0, sizeof(struct __bridge_info));
		rcu_read_lock();
		memcpy(&b.designated_root, &br->designated_root, 8);
		memcpy(&b.bridge_id, &br->bridge_id, 8);
		b.root_path_cost = br->root_path_cost;
		b.max_age = jiffies_to_clock_t(br->max_age);
		b.hello_time = jiffies_to_clock_t(br->hello_time);
		b.forward_delay = br->forward_delay;
		b.bridge_max_age = br->bridge_max_age;
		b.bridge_hello_time = br->bridge_hello_time;
		b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay);
		b.topology_change = br->topology_change;
		b.topology_change_detected = br->topology_change_detected;
		b.root_port = br->root_port;

		b.stp_enabled = (br->stp_enabled != BR_NO_STP);
		b.ageing_time = jiffies_to_clock_t(br->ageing_time);
		b.hello_timer_value = br_timer_value(&br->hello_timer);
		b.tcn_timer_value = br_timer_value(&br->tcn_timer);
		b.topology_change_timer_value = br_timer_value(&br->topology_change_timer);
		b.gc_timer_value = br_timer_value(&br->gc_timer);
		rcu_read_unlock();

		if (copy_to_user((void __user *)args[1], &b, sizeof(b)))
			return -EFAULT;

		return 0;
	}

	case BRCTL_GET_PORT_LIST:
	{
		int num, *indices;

		num = args[2];
		if (num < 0)
			return -EINVAL;
		if (num == 0)
			num = 256;
		if (num > BR_MAX_PORTS)
			num = BR_MAX_PORTS;

		indices = kcalloc(num, sizeof(int), GFP_KERNEL);
		if (indices == NULL)
			return -ENOMEM;

		get_port_ifindices(br, indices, num);
		if (copy_to_user((void __user *)args[1], indices, num*sizeof(int)))
			num =  -EFAULT;
		kfree(indices);
		return num;
	}

	case BRCTL_SET_BRIDGE_FORWARD_DELAY:
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		ret = br_set_forward_delay(br, args[1]);
		break;

	case BRCTL_SET_BRIDGE_HELLO_TIME:
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		ret = br_set_hello_time(br, args[1]);
		break;

	case BRCTL_SET_BRIDGE_MAX_AGE:
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		ret = br_set_max_age(br, args[1]);
		break;

	case BRCTL_SET_AGEING_TIME:
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		ret = br_set_ageing_time(br, args[1]);
		break;

	case BRCTL_GET_PORT_INFO:
	{
		struct __port_info p;
		struct net_bridge_port *pt;

		rcu_read_lock();
		if ((pt = br_get_port(br, args[2])) == NULL) {
			rcu_read_unlock();
			return -EINVAL;
		}

		memset(&p, 0, sizeof(struct __port_info));
		memcpy(&p.designated_root, &pt->designated_root, 8);
		memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
		p.port_id = pt->port_id;
		p.designated_port = pt->designated_port;
		p.path_cost = pt->path_cost;
		p.designated_cost = pt->designated_cost;
		p.state = pt->state;
		p.top_change_ack = pt->topology_change_ack;
		p.config_pending = pt->config_pending;
		p.message_age_timer_value = br_timer_value(&pt->message_age_timer);
		p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer);
		p.hold_timer_value = br_timer_value(&pt->hold_timer);

		rcu_read_unlock();

		if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
			return -EFAULT;

		return 0;
	}

	case BRCTL_SET_BRIDGE_STP_STATE:
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		br_stp_set_enabled(br, args[1]);
		ret = 0;
		break;

	case BRCTL_SET_BRIDGE_PRIORITY:
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		br_stp_set_bridge_priority(br, args[1]);
		ret = 0;
		break;

	case BRCTL_SET_PORT_PRIORITY:
	{
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		spin_lock_bh(&br->lock);
		if ((p = br_get_port(br, args[1])) == NULL)
			ret = -EINVAL;
		else
			ret = br_stp_set_port_priority(p, args[2]);
		spin_unlock_bh(&br->lock);
		break;
	}

	case BRCTL_SET_PATH_COST:
	{
		if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		spin_lock_bh(&br->lock);
		if ((p = br_get_port(br, args[1])) == NULL)
			ret = -EINVAL;
		else
			ret = br_stp_set_path_cost(p, args[2]);
		spin_unlock_bh(&br->lock);
		break;
	}

	case BRCTL_GET_FDB_ENTRIES:
		return get_fdb_entries(br, (void __user *)args[1],
				       args[2], args[3]);
	}

	if (!ret) {
		if (p)
			br_ifinfo_notify(RTM_NEWLINK, p);
		else
			netdev_state_change(br->dev);
	}

	return ret;
}

static int old_deviceless(struct net *net, void __user *uarg)
{
	unsigned long args[3];

	if (copy_from_user(args, uarg, sizeof(args)))
		return -EFAULT;

	switch (args[0]) {
	case BRCTL_GET_VERSION:
		return BRCTL_VERSION;

	case BRCTL_GET_BRIDGES:
	{
		int *indices;
		int ret = 0;

		if (args[2] >= 2048)
			return -ENOMEM;
		indices = kcalloc(args[2], sizeof(int), GFP_KERNEL);
		if (indices == NULL)
			return -ENOMEM;

		args[2] = get_bridge_ifindices(net, indices, args[2]);

		ret = copy_to_user((void __user *)args[1], indices, args[2]*sizeof(int))
			? -EFAULT : args[2];

		kfree(indices);
		return ret;
	}

	case BRCTL_ADD_BRIDGE:
	case BRCTL_DEL_BRIDGE:
	{
		char buf[IFNAMSIZ];

		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
			return -EFAULT;

		buf[IFNAMSIZ-1] = 0;

		if (args[0] == BRCTL_ADD_BRIDGE)
			return br_add_bridge(net, buf);

		return br_del_bridge(net, buf);
	}
	}

	return -EOPNOTSUPP;
}

int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *uarg)
{
	switch (cmd) {
	case SIOCGIFBR:
	case SIOCSIFBR:
		return old_deviceless(net, uarg);

	case SIOCBRADDBR:
	case SIOCBRDELBR:
	{
		char buf[IFNAMSIZ];

		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
			return -EPERM;

		if (copy_from_user(buf, uarg, IFNAMSIZ))
			return -EFAULT;

		buf[IFNAMSIZ-1] = 0;
		if (cmd == SIOCBRADDBR)
			return br_add_bridge(net, buf);

		return br_del_bridge(net, buf);
	}
	}
	return -EOPNOTSUPP;
}

int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct net_bridge *br = netdev_priv(dev);

	switch (cmd) {
	case SIOCDEVPRIVATE:
		return old_dev_ioctl(dev, rq, cmd);

	case SIOCBRADDIF:
	case SIOCBRDELIF:
		return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);

	}

	br_debug(br, "Bridge does not support ioctl 0x%x\n", cmd);
	return -EOPNOTSUPP;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Ioctl handler
	3	* Linux ethernet bridge
	4	*
	5	* Authors:
	6	* Lennert Buytenhek <buytenh@gnu.org>
	7	*
1da177e4 LT	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version
	11	* 2 of the License, or (at your option) any later version.
	12	*/
	13
4fc268d2	14	#include <linux/capability.h>
1da177e4 LT	15	#include <linux/kernel.h>
	16	#include <linux/if_bridge.h>
	17	#include <linux/netdevice.h>
5a0e3ad6	18	#include <linux/slab.h>
1da177e4	19	#include <linux/times.h>
881d966b	20	#include <net/net_namespace.h>
1da177e4 LT	21	#include <asm/uaccess.h>
	22	#include "br_private.h"
	23
	24	/* called with RTNL */
4aa678ba	25	static int get_bridge_ifindices(struct net net, int indices, int num)
1da177e4 LT	26	{
	27	struct net_device *dev;
	28	int i = 0;
	29
4aa678ba	30	for_each_netdev(net, dev) {
7562f876 PE	31	if (i >= num)
7562f876 PE	32	break;
9d6f229f	33	if (dev->priv_flags & IFF_EBRIDGE)
1da177e4 LT	34	indices[i++] = dev->ifindex;
	35	}
	36
	37	return i;
	38	}
	39
	40	/* called with RTNL */
	41	static void get_port_ifindices(struct net_bridge br, int ifindices, int num)
	42	{
	43	struct net_bridge_port *p;
	44
	45	list_for_each_entry(p, &br->port_list, list) {
	46	if (p->port_no < num)
	47	ifindices[p->port_no] = p->dev->ifindex;
	48	}
	49	}
	50
	51	/*
	52	* Format up to a page worth of forwarding table entries
	53	* userbuf -- where to copy result
	54	* maxnum -- maximum number of entries desired
	55	* (limited to a page for sanity)
	56	* offset -- number of records to skip
	57	*/
9d6f229f	58	static int get_fdb_entries(struct net_bridge br, void __user userbuf,
1da177e4 LT	59	unsigned long maxnum, unsigned long offset)
	60	{
	61	int num;
	62	void *buf;
ba8379b2	63	size_t size;
1da177e4	64
ba8379b2 CW	65	/* Clamp size to PAGE_SIZE, test maxnum to avoid overflow */
ba8379b2 CW	66	if (maxnum > PAGE_SIZE/sizeof(struct __fdb_entry))
1da177e4	67	maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);
ba8379b2 CW	68
ba8379b2 CW	69	size = maxnum * sizeof(struct __fdb_entry);
1da177e4 LT	70
	71	buf = kmalloc(size, GFP_USER);
	72	if (!buf)
	73	return -ENOMEM;
9d6f229f	74
1da177e4 LT	75	num = br_fdb_fillbuf(br, buf, maxnum, offset);
	76	if (num > 0) {
	77	if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry)))
	78	num = -EFAULT;
	79	}
	80	kfree(buf);
	81
	82	return num;
	83	}
	84
31ef30c7	85	/* called with RTNL */
1da177e4 LT	86	static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
1da177e4 LT	87	{
cb990503	88	struct net *net = dev_net(br->dev);
1da177e4 LT	89	struct net_device *dev;
	90	int ret;
	91
cb990503	92	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4 LT	93	return -EPERM;
1da177e4 LT	94
cb990503	95	dev = __dev_get_by_index(net, ifindex);
1da177e4 LT	96	if (dev == NULL)
1da177e4 LT	97	return -EINVAL;
9d6f229f	98
1da177e4 LT	99	if (isadd)
	100	ret = br_add_if(br, dev);
	101	else
	102	ret = br_del_if(br, dev);
	103
1da177e4 LT	104	return ret;
	105	}
	106
	107	/*
	108	* Legacy ioctl's through SIOCDEVPRIVATE
	109	* This interface is deprecated because it was too difficult to
25985edc	110	* to do the translation for 32/64bit ioctl compatibility.
1da177e4 LT	111	*/
	112	static int old_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd)
	113	{
	114	struct net_bridge *br = netdev_priv(dev);
bf871ad7	115	struct net_bridge_port *p = NULL;
1da177e4	116	unsigned long args[4];
bf871ad7	117	int ret = -EOPNOTSUPP;
9d6f229f	118
1da177e4 LT	119	if (copy_from_user(args, rq->ifr_data, sizeof(args)))
	120	return -EFAULT;
	121
	122	switch (args[0]) {
	123	case BRCTL_ADD_IF:
	124	case BRCTL_DEL_IF:
	125	return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF);
	126
	127	case BRCTL_GET_BRIDGE_INFO:
	128	{
	129	struct __bridge_info b;
	130
	131	memset(&b, 0, sizeof(struct __bridge_info));
	132	rcu_read_lock();
	133	memcpy(&b.designated_root, &br->designated_root, 8);
	134	memcpy(&b.bridge_id, &br->bridge_id, 8);
	135	b.root_path_cost = br->root_path_cost;
	136	b.max_age = jiffies_to_clock_t(br->max_age);
	137	b.hello_time = jiffies_to_clock_t(br->hello_time);
	138	b.forward_delay = br->forward_delay;
	139	b.bridge_max_age = br->bridge_max_age;
	140	b.bridge_hello_time = br->bridge_hello_time;
	141	b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay);
	142	b.topology_change = br->topology_change;
	143	b.topology_change_detected = br->topology_change_detected;
	144	b.root_port = br->root_port;
9cde0708 SH	145
9cde0708 SH	146	b.stp_enabled = (br->stp_enabled != BR_NO_STP);
1da177e4 LT	147	b.ageing_time = jiffies_to_clock_t(br->ageing_time);
	148	b.hello_timer_value = br_timer_value(&br->hello_timer);
	149	b.tcn_timer_value = br_timer_value(&br->tcn_timer);
	150	b.topology_change_timer_value = br_timer_value(&br->topology_change_timer);
	151	b.gc_timer_value = br_timer_value(&br->gc_timer);
9d6f229f	152	rcu_read_unlock();
1da177e4 LT	153
	154	if (copy_to_user((void __user *)args[1], &b, sizeof(b)))
	155	return -EFAULT;
	156
	157	return 0;
	158	}
	159
	160	case BRCTL_GET_PORT_LIST:
	161	{
	162	int num, *indices;
	163
	164	num = args[2];
	165	if (num < 0)
	166	return -EINVAL;
	167	if (num == 0)
	168	num = 256;
	169	if (num > BR_MAX_PORTS)
	170	num = BR_MAX_PORTS;
	171
0da974f4	172	indices = kcalloc(num, sizeof(int), GFP_KERNEL);
1da177e4 LT	173	if (indices == NULL)
	174	return -ENOMEM;
	175
1da177e4 LT	176	get_port_ifindices(br, indices, num);
	177	if (copy_to_user((void __user )args[1], indices, numsizeof(int)))
	178	num = -EFAULT;
	179	kfree(indices);
	180	return num;
	181	}
	182
	183	case BRCTL_SET_BRIDGE_FORWARD_DELAY:
cb990503	184	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	185	return -EPERM;
1da177e4 LT	186
bf871ad7 XL	187	ret = br_set_forward_delay(br, args[1]);
bf871ad7 XL	188	break;
1da177e4 LT	189
1da177e4 LT	190	case BRCTL_SET_BRIDGE_HELLO_TIME:
cb990503	191	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	192	return -EPERM;
1da177e4 LT	193
bf871ad7 XL	194	ret = br_set_hello_time(br, args[1]);
bf871ad7 XL	195	break;
1da177e4 LT	196
1da177e4 LT	197	case BRCTL_SET_BRIDGE_MAX_AGE:
cb990503	198	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	199	return -EPERM;
1da177e4 LT	200
bf871ad7 XL	201	ret = br_set_max_age(br, args[1]);
bf871ad7 XL	202	break;
1da177e4 LT	203
1da177e4 LT	204	case BRCTL_SET_AGEING_TIME:
cb990503	205	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	206	return -EPERM;
1da177e4 LT	207
bf871ad7 XL	208	ret = br_set_ageing_time(br, args[1]);
bf871ad7 XL	209	break;
1da177e4 LT	210
	211	case BRCTL_GET_PORT_INFO:
	212	{
	213	struct __port_info p;
	214	struct net_bridge_port *pt;
	215
	216	rcu_read_lock();
	217	if ((pt = br_get_port(br, args[2])) == NULL) {
	218	rcu_read_unlock();
	219	return -EINVAL;
	220	}
	221
	222	memset(&p, 0, sizeof(struct __port_info));
	223	memcpy(&p.designated_root, &pt->designated_root, 8);
	224	memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
	225	p.port_id = pt->port_id;
	226	p.designated_port = pt->designated_port;
	227	p.path_cost = pt->path_cost;
	228	p.designated_cost = pt->designated_cost;
	229	p.state = pt->state;
	230	p.top_change_ack = pt->topology_change_ack;
	231	p.config_pending = pt->config_pending;
	232	p.message_age_timer_value = br_timer_value(&pt->message_age_timer);
	233	p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer);
	234	p.hold_timer_value = br_timer_value(&pt->hold_timer);
	235
	236	rcu_read_unlock();
	237
	238	if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
	239	return -EFAULT;
	240
	241	return 0;
	242	}
	243
	244	case BRCTL_SET_BRIDGE_STP_STATE:
cb990503	245	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	246	return -EPERM;
1da177e4 LT	247
9cde0708	248	br_stp_set_enabled(br, args[1]);
bf871ad7 XL	249	ret = 0;
bf871ad7 XL	250	break;
1da177e4 LT	251
1da177e4 LT	252	case BRCTL_SET_BRIDGE_PRIORITY:
cb990503	253	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	254	return -EPERM;
1da177e4 LT	255
1da177e4	256	br_stp_set_bridge_priority(br, args[1]);
bf871ad7 XL	257	ret = 0;
bf871ad7 XL	258	break;
1da177e4 LT	259
	260	case BRCTL_SET_PORT_PRIORITY:
	261	{
cb990503	262	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	263	return -EPERM;
1da177e4 LT	264
1da177e4	265	spin_lock_bh(&br->lock);
9d6f229f	266	if ((p = br_get_port(br, args[1])) == NULL)
1da177e4 LT	267	ret = -EINVAL;
1da177e4 LT	268	else
14f98f25	269	ret = br_stp_set_port_priority(p, args[2]);
1da177e4	270	spin_unlock_bh(&br->lock);
bf871ad7	271	break;
1da177e4 LT	272	}
	273
	274	case BRCTL_SET_PATH_COST:
	275	{
cb990503	276	if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
1da177e4 LT	277	return -EPERM;
1da177e4 LT	278
14f98f25	279	spin_lock_bh(&br->lock);
1da177e4 LT	280	if ((p = br_get_port(br, args[1])) == NULL)
	281	ret = -EINVAL;
	282	else
14f98f25	283	ret = br_stp_set_path_cost(p, args[2]);
14f98f25	284	spin_unlock_bh(&br->lock);
bf871ad7	285	break;
1da177e4 LT	286	}
	287
	288	case BRCTL_GET_FDB_ENTRIES:
9d6f229f	289	return get_fdb_entries(br, (void __user *)args[1],
1da177e4 LT	290	args[2], args[3]);
	291	}
	292
bf871ad7 XL	293	if (!ret) {
	294	if (p)
	295	br_ifinfo_notify(RTM_NEWLINK, p);
	296	else
	297	netdev_state_change(br->dev);
	298	}
	299
	300	return ret;
1da177e4 LT	301	}
1da177e4 LT	302
4aa678ba	303	static int old_deviceless(struct net net, void __user uarg)
1da177e4 LT	304	{
	305	unsigned long args[3];
	306
	307	if (copy_from_user(args, uarg, sizeof(args)))
	308	return -EFAULT;
	309
	310	switch (args[0]) {
	311	case BRCTL_GET_VERSION:
	312	return BRCTL_VERSION;
	313
	314	case BRCTL_GET_BRIDGES:
	315	{
	316	int *indices;
	317	int ret = 0;
	318
	319	if (args[2] >= 2048)
	320	return -ENOMEM;
0da974f4	321	indices = kcalloc(args[2], sizeof(int), GFP_KERNEL);
1da177e4 LT	322	if (indices == NULL)
	323	return -ENOMEM;
	324
4aa678ba	325	args[2] = get_bridge_ifindices(net, indices, args[2]);
1da177e4 LT	326
	327	ret = copy_to_user((void __user )args[1], indices, args[2]sizeof(int))
	328	? -EFAULT : args[2];
	329
	330	kfree(indices);
	331	return ret;
	332	}
	333
	334	case BRCTL_ADD_BRIDGE:
	335	case BRCTL_DEL_BRIDGE:
	336	{
	337	char buf[IFNAMSIZ];
	338
cb990503	339	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4 LT	340	return -EPERM;
	341
	342	if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
	343	return -EFAULT;
	344
	345	buf[IFNAMSIZ-1] = 0;
	346
	347	if (args[0] == BRCTL_ADD_BRIDGE)
4aa678ba	348	return br_add_bridge(net, buf);
1da177e4	349
4aa678ba	350	return br_del_bridge(net, buf);
1da177e4 LT	351	}
	352	}
	353
	354	return -EOPNOTSUPP;
	355	}
	356
881d966b	357	int br_ioctl_deviceless_stub(struct net net, unsigned int cmd, void __user uarg)
1da177e4 LT	358	{
	359	switch (cmd) {
	360	case SIOCGIFBR:
	361	case SIOCSIFBR:
4aa678ba	362	return old_deviceless(net, uarg);
9d6f229f	363
1da177e4 LT	364	case SIOCBRADDBR:
	365	case SIOCBRDELBR:
	366	{
	367	char buf[IFNAMSIZ];
	368
cb990503	369	if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4 LT	370	return -EPERM;
	371
	372	if (copy_from_user(buf, uarg, IFNAMSIZ))
	373	return -EFAULT;
	374
	375	buf[IFNAMSIZ-1] = 0;
	376	if (cmd == SIOCBRADDBR)
4aa678ba	377	return br_add_bridge(net, buf);
1da177e4	378
4aa678ba	379	return br_del_bridge(net, buf);
1da177e4 LT	380	}
	381	}
	382	return -EOPNOTSUPP;
	383	}
	384
	385	int br_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd)
	386	{
	387	struct net_bridge *br = netdev_priv(dev);
	388
31a5b837	389	switch (cmd) {
1da177e4 LT	390	case SIOCDEVPRIVATE:
	391	return old_dev_ioctl(dev, rq, cmd);
	392
	393	case SIOCBRADDIF:
	394	case SIOCBRDELIF:
	395	return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);
	396
	397	}
	398
28a16c97	399	br_debug(br, "Bridge does not support ioctl 0x%x\n", cmd);
1da177e4 LT	400	return -EOPNOTSUPP;
1da177e4 LT	401	}