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

/*
 *	Ioctl handler
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<[email protected]>
 *
 *	$Id: br_ioctl.c,v 1.4 2000/11/08 05:16:40 davem Exp $
 *
 *	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/times.h>
#include <asm/uaccess.h>
#include "br_private.h"

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

	for (dev = dev_base; dev && i < num; dev = dev->next) {
		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 = maxnum * sizeof(struct __fdb_entry);

	if (size > PAGE_SIZE) {
		size = PAGE_SIZE;
		maxnum = PAGE_SIZE/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;
}

static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
{
	struct net_device *dev;
	int ret;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	dev = dev_get_by_index(ifindex);
	if (dev == NULL)
		return -EINVAL;
	
	if (isadd)
		ret = br_add_if(br, dev);
	else
		ret = br_del_if(br, dev);

	dev_put(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 compatability.
 */
static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct net_bridge *br = netdev_priv(dev);
	unsigned long args[4];
	
	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;
		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 (!capable(CAP_NET_ADMIN))
			return -EPERM;

		spin_lock_bh(&br->lock);
		br->bridge_forward_delay = clock_t_to_jiffies(args[1]);
		if (br_is_root_bridge(br))
			br->forward_delay = br->bridge_forward_delay;
		spin_unlock_bh(&br->lock);
		return 0;

	case BRCTL_SET_BRIDGE_HELLO_TIME:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		spin_lock_bh(&br->lock);
		br->bridge_hello_time = clock_t_to_jiffies(args[1]);
		if (br_is_root_bridge(br))
			br->hello_time = br->bridge_hello_time;
		spin_unlock_bh(&br->lock);
		return 0;

	case BRCTL_SET_BRIDGE_MAX_AGE:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		spin_lock_bh(&br->lock);
		br->bridge_max_age = clock_t_to_jiffies(args[1]);
		if (br_is_root_bridge(br))
			br->max_age = br->bridge_max_age;
		spin_unlock_bh(&br->lock);
		return 0;

	case BRCTL_SET_AGEING_TIME:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		br->ageing_time = clock_t_to_jiffies(args[1]);
		return 0;

	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 (!capable(CAP_NET_ADMIN))
			return -EPERM;

		br->stp_enabled = args[1]?1:0;
		return 0;

	case BRCTL_SET_BRIDGE_PRIORITY:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		spin_lock_bh(&br->lock);
		br_stp_set_bridge_priority(br, args[1]);
		spin_unlock_bh(&br->lock);
		return 0;

	case BRCTL_SET_PORT_PRIORITY:
	{
		struct net_bridge_port *p;
		int ret = 0;

		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (args[2] >= (1<<(16-BR_PORT_BITS)))
			return -ERANGE;

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

	case BRCTL_SET_PATH_COST:
	{
		struct net_bridge_port *p;
		int ret = 0;

		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

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

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

	return -EOPNOTSUPP;
}

static int old_deviceless(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(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 (!capable(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(buf);

		return br_del_bridge(buf);
	}
	}

	return -EOPNOTSUPP;
}

int br_ioctl_deviceless_stub(unsigned int cmd, void __user *uarg)
{
	switch (cmd) {
	case SIOCGIFBR:
	case SIOCSIFBR:
		return old_deviceless(uarg);
		
	case SIOCBRADDBR:
	case SIOCBRDELBR:
	{
		char buf[IFNAMSIZ];

		if (!capable(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(buf);

		return br_del_bridge(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);

	}

	pr_debug("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 <[email protected]>
	7	*
	8	* $Id: br_ioctl.c,v 1.4 2000/11/08 05:16:40 davem Exp $
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* as published by the Free Software Foundation; either version
	13	* 2 of the License, or (at your option) any later version.
	14	*/
	15
4fc268d2	16	#include <linux/capability.h>
1da177e4 LT	17	#include <linux/kernel.h>
	18	#include <linux/if_bridge.h>
	19	#include <linux/netdevice.h>
	20	#include <linux/times.h>
	21	#include <asm/uaccess.h>
	22	#include "br_private.h"
	23
	24	/* called with RTNL */
	25	static int get_bridge_ifindices(int *indices, int num)
	26	{
	27	struct net_device *dev;
	28	int i = 0;
	29
	30	for (dev = dev_base; dev && i < num; dev = dev->next) {
	31	if (dev->priv_flags & IFF_EBRIDGE)
	32	indices[i++] = dev->ifindex;
	33	}
	34
	35	return i;
	36	}
	37
	38	/* called with RTNL */
	39	static void get_port_ifindices(struct net_bridge br, int ifindices, int num)
	40	{
	41	struct net_bridge_port *p;
	42
	43	list_for_each_entry(p, &br->port_list, list) {
	44	if (p->port_no < num)
	45	ifindices[p->port_no] = p->dev->ifindex;
	46	}
	47	}
	48
	49	/*
	50	* Format up to a page worth of forwarding table entries
	51	* userbuf -- where to copy result
	52	* maxnum -- maximum number of entries desired
	53	* (limited to a page for sanity)
	54	* offset -- number of records to skip
	55	*/
	56	static int get_fdb_entries(struct net_bridge br, void __user userbuf,
	57	unsigned long maxnum, unsigned long offset)
	58	{
	59	int num;
	60	void *buf;
	61	size_t size = maxnum * sizeof(struct __fdb_entry);
	62
	63	if (size > PAGE_SIZE) {
	64	size = PAGE_SIZE;
	65	maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);
	66	}
	67
	68	buf = kmalloc(size, GFP_USER);
	69	if (!buf)
	70	return -ENOMEM;
	71
	72	num = br_fdb_fillbuf(br, buf, maxnum, offset);
	73	if (num > 0) {
	74	if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry)))
	75	num = -EFAULT;
	76	}
	77	kfree(buf);
	78
	79	return num;
	80	}
81
82	static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
83	{
84	struct net_device *dev;
85	int ret;
86
87	if (!capable(CAP_NET_ADMIN))
88	return -EPERM;
89
90	dev = dev_get_by_index(ifindex);
91	if (dev == NULL)
92	return -EINVAL;
93
94	if (isadd)
95	ret = br_add_if(br, dev);
96	else
97	ret = br_del_if(br, dev);
98
99	dev_put(dev);
100	return ret;
101	}
102
103	/*
104	* Legacy ioctl's through SIOCDEVPRIVATE
105	* This interface is deprecated because it was too difficult to
106	* to do the translation for 32/64bit ioctl compatability.
107	*/
108	static int old_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd)
109	{
110	struct net_bridge *br = netdev_priv(dev);
111	unsigned long args[4];
112
113	if (copy_from_user(args, rq->ifr_data, sizeof(args)))
114	return -EFAULT;
115
116	switch (args[0]) {
117	case BRCTL_ADD_IF:
118	case BRCTL_DEL_IF:
119	return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF);
120
121	case BRCTL_GET_BRIDGE_INFO:
122	{
123	struct __bridge_info b;
124
125	memset(&b, 0, sizeof(struct __bridge_info));
126	rcu_read_lock();
127	memcpy(&b.designated_root, &br->designated_root, 8);
128	memcpy(&b.bridge_id, &br->bridge_id, 8);
129	b.root_path_cost = br->root_path_cost;
130	b.max_age = jiffies_to_clock_t(br->max_age);
131	b.hello_time = jiffies_to_clock_t(br->hello_time);
132	b.forward_delay = br->forward_delay;
133	b.bridge_max_age = br->bridge_max_age;
134	b.bridge_hello_time = br->bridge_hello_time;
135	b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay);
136	b.topology_change = br->topology_change;
137	b.topology_change_detected = br->topology_change_detected;
138	b.root_port = br->root_port;
139	b.stp_enabled = br->stp_enabled;
140	b.ageing_time = jiffies_to_clock_t(br->ageing_time);
141	b.hello_timer_value = br_timer_value(&br->hello_timer);
142	b.tcn_timer_value = br_timer_value(&br->tcn_timer);
143	b.topology_change_timer_value = br_timer_value(&br->topology_change_timer);
144	b.gc_timer_value = br_timer_value(&br->gc_timer);
145	rcu_read_unlock();
146
147	if (copy_to_user((void __user *)args[1], &b, sizeof(b)))
148	return -EFAULT;
149
150	return 0;
151	}
152
153	case BRCTL_GET_PORT_LIST:
154	{
155	int num, *indices;
156
157	num = args[2];
158	if (num < 0)
159	return -EINVAL;
160	if (num == 0)
161	num = 256;
162	if (num > BR_MAX_PORTS)
163	num = BR_MAX_PORTS;
164
0da974f4	165	indices = kcalloc(num, sizeof(int), GFP_KERNEL);
1da177e4 LT	166	if (indices == NULL)
	167	return -ENOMEM;
	168
1da177e4 LT	169	get_port_ifindices(br, indices, num);
	170	if (copy_to_user((void __user )args[1], indices, numsizeof(int)))
	171	num = -EFAULT;
	172	kfree(indices);
	173	return num;
	174	}
	175
	176	case BRCTL_SET_BRIDGE_FORWARD_DELAY:
	177	if (!capable(CAP_NET_ADMIN))
	178	return -EPERM;
	179
	180	spin_lock_bh(&br->lock);
	181	br->bridge_forward_delay = clock_t_to_jiffies(args[1]);
	182	if (br_is_root_bridge(br))
	183	br->forward_delay = br->bridge_forward_delay;
	184	spin_unlock_bh(&br->lock);
	185	return 0;
	186
	187	case BRCTL_SET_BRIDGE_HELLO_TIME:
	188	if (!capable(CAP_NET_ADMIN))
	189	return -EPERM;
	190
	191	spin_lock_bh(&br->lock);
	192	br->bridge_hello_time = clock_t_to_jiffies(args[1]);
	193	if (br_is_root_bridge(br))
	194	br->hello_time = br->bridge_hello_time;
	195	spin_unlock_bh(&br->lock);
	196	return 0;
	197
	198	case BRCTL_SET_BRIDGE_MAX_AGE:
	199	if (!capable(CAP_NET_ADMIN))
	200	return -EPERM;
	201
	202	spin_lock_bh(&br->lock);
	203	br->bridge_max_age = clock_t_to_jiffies(args[1]);
	204	if (br_is_root_bridge(br))
	205	br->max_age = br->bridge_max_age;
	206	spin_unlock_bh(&br->lock);
	207	return 0;
	208
	209	case BRCTL_SET_AGEING_TIME:
	210	if (!capable(CAP_NET_ADMIN))
	211	return -EPERM;
	212
	213	br->ageing_time = clock_t_to_jiffies(args[1]);
	214	return 0;
	215
	216	case BRCTL_GET_PORT_INFO:
	217	{
	218	struct __port_info p;
	219	struct net_bridge_port *pt;
	220
	221	rcu_read_lock();
	222	if ((pt = br_get_port(br, args[2])) == NULL) {
	223	rcu_read_unlock();
	224	return -EINVAL;
	225	}
	226
	227	memset(&p, 0, sizeof(struct __port_info));
	228	memcpy(&p.designated_root, &pt->designated_root, 8);
	229	memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
	230	p.port_id = pt->port_id;
	231	p.designated_port = pt->designated_port;
	232	p.path_cost = pt->path_cost;
233	p.designated_cost = pt->designated_cost;
234	p.state = pt->state;
235	p.top_change_ack = pt->topology_change_ack;
236	p.config_pending = pt->config_pending;
237	p.message_age_timer_value = br_timer_value(&pt->message_age_timer);
238	p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer);
239	p.hold_timer_value = br_timer_value(&pt->hold_timer);
240
241	rcu_read_unlock();
242
243	if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
244	return -EFAULT;
245
246	return 0;
247	}
248
249	case BRCTL_SET_BRIDGE_STP_STATE:
250	if (!capable(CAP_NET_ADMIN))
251	return -EPERM;
252
253	br->stp_enabled = args[1]?1:0;
254	return 0;
255
256	case BRCTL_SET_BRIDGE_PRIORITY:
257	if (!capable(CAP_NET_ADMIN))
258	return -EPERM;
259
260	spin_lock_bh(&br->lock);
261	br_stp_set_bridge_priority(br, args[1]);
262	spin_unlock_bh(&br->lock);
263	return 0;
264
265	case BRCTL_SET_PORT_PRIORITY:
266	{
267	struct net_bridge_port *p;
268	int ret = 0;
269
270	if (!capable(CAP_NET_ADMIN))
271	return -EPERM;
272
273	if (args[2] >= (1<<(16-BR_PORT_BITS)))
274	return -ERANGE;
275
276	spin_lock_bh(&br->lock);
277	if ((p = br_get_port(br, args[1])) == NULL)
278	ret = -EINVAL;
279	else
280	br_stp_set_port_priority(p, args[2]);
281	spin_unlock_bh(&br->lock);
282	return ret;
283	}
284
285	case BRCTL_SET_PATH_COST:
286	{
287	struct net_bridge_port *p;
288	int ret = 0;
289
290	if (!capable(CAP_NET_ADMIN))
291	return -EPERM;
292
293	spin_lock_bh(&br->lock);
294	if ((p = br_get_port(br, args[1])) == NULL)
295	ret = -EINVAL;
296	else
297	br_stp_set_path_cost(p, args[2]);
298	spin_unlock_bh(&br->lock);
299	return ret;
300	}
301
302	case BRCTL_GET_FDB_ENTRIES:
303	return get_fdb_entries(br, (void __user *)args[1],
304	args[2], args[3]);
305	}
306
307	return -EOPNOTSUPP;
308	}
309
310	static int old_deviceless(void __user *uarg)
311	{
312	unsigned long args[3];
313
314	if (copy_from_user(args, uarg, sizeof(args)))
315	return -EFAULT;
316
317	switch (args[0]) {
318	case BRCTL_GET_VERSION:
319	return BRCTL_VERSION;
320
321	case BRCTL_GET_BRIDGES:
322	{
323	int *indices;
324	int ret = 0;
325
326	if (args[2] >= 2048)
327	return -ENOMEM;
0da974f4	328	indices = kcalloc(args[2], sizeof(int), GFP_KERNEL);
1da177e4 LT	329	if (indices == NULL)
	330	return -ENOMEM;
	331
1da177e4 LT	332	args[2] = get_bridge_ifindices(indices, args[2]);
	333
	334	ret = copy_to_user((void __user )args[1], indices, args[2]sizeof(int))
	335	? -EFAULT : args[2];
	336
	337	kfree(indices);
	338	return ret;
	339	}
	340
	341	case BRCTL_ADD_BRIDGE:
	342	case BRCTL_DEL_BRIDGE:
	343	{
	344	char buf[IFNAMSIZ];
	345
	346	if (!capable(CAP_NET_ADMIN))
	347	return -EPERM;
	348
	349	if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
	350	return -EFAULT;
	351
	352	buf[IFNAMSIZ-1] = 0;
	353
	354	if (args[0] == BRCTL_ADD_BRIDGE)
	355	return br_add_bridge(buf);
	356
	357	return br_del_bridge(buf);
	358	}
	359	}
	360
	361	return -EOPNOTSUPP;
	362	}
	363
	364	int br_ioctl_deviceless_stub(unsigned int cmd, void __user *uarg)
	365	{
	366	switch (cmd) {
	367	case SIOCGIFBR:
	368	case SIOCSIFBR:
	369	return old_deviceless(uarg);
	370
	371	case SIOCBRADDBR:
	372	case SIOCBRDELBR:
	373	{
	374	char buf[IFNAMSIZ];
	375
	376	if (!capable(CAP_NET_ADMIN))
	377	return -EPERM;
	378
	379	if (copy_from_user(buf, uarg, IFNAMSIZ))
	380	return -EFAULT;
	381
	382	buf[IFNAMSIZ-1] = 0;
	383	if (cmd == SIOCBRADDBR)
	384	return br_add_bridge(buf);
	385
	386	return br_del_bridge(buf);
	387	}
	388	}
	389	return -EOPNOTSUPP;
	390	}
	391
	392	int br_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd)
	393	{
	394	struct net_bridge *br = netdev_priv(dev);
	395
396	switch(cmd) {
397	case SIOCDEVPRIVATE:
398	return old_dev_ioctl(dev, rq, cmd);
399
400	case SIOCBRADDIF:
401	case SIOCBRDELIF:
402	return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);
403
404	}
405
406	pr_debug("Bridge does not support ioctl 0x%x\n", cmd);
407	return -EOPNOTSUPP;
408	}