[linux-2.6-block.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/times.h>
#include <net/net_namespace.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_each_netdev(&init_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;
}

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(&init_net, 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 != 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 (!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:
	{
		unsigned long t = clock_t_to_jiffies(args[1]);
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;

		if (t < HZ)
			return -EINVAL;

		spin_lock_bh(&br->lock);
		br->bridge_hello_time = t;
		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_set_enabled(br, args[1]);
		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;

		if ((p = br_get_port(br, args[1])) == NULL)
			ret = -EINVAL;
		else
			br_stp_set_path_cost(p, args[2]);

		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(struct net *net, 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 <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>
	18	#include <linux/times.h>
881d966b	19	#include <net/net_namespace.h>
1da177e4 LT	20	#include <asm/uaccess.h>
	21	#include "br_private.h"
	22
	23	/* called with RTNL */
	24	static int get_bridge_ifindices(int *indices, int num)
	25	{
	26	struct net_device *dev;
	27	int i = 0;
	28
881d966b	29	for_each_netdev(&init_net, dev) {
7562f876 PE	30	if (i >= num)
7562f876 PE	31	break;
9d6f229f	32	if (dev->priv_flags & IFF_EBRIDGE)
1da177e4 LT	33	indices[i++] = dev->ifindex;
	34	}
	35
	36	return i;
	37	}
	38
	39	/* called with RTNL */
	40	static void get_port_ifindices(struct net_bridge br, int ifindices, int num)
	41	{
	42	struct net_bridge_port *p;
	43
	44	list_for_each_entry(p, &br->port_list, list) {
	45	if (p->port_no < num)
	46	ifindices[p->port_no] = p->dev->ifindex;
	47	}
	48	}
	49
	50	/*
	51	* Format up to a page worth of forwarding table entries
	52	* userbuf -- where to copy result
	53	* maxnum -- maximum number of entries desired
	54	* (limited to a page for sanity)
	55	* offset -- number of records to skip
	56	*/
9d6f229f	57	static int get_fdb_entries(struct net_bridge br, void __user userbuf,
1da177e4 LT	58	unsigned long maxnum, unsigned long offset)
	59	{
	60	int num;
	61	void *buf;
ba8379b2	62	size_t size;
1da177e4	63
ba8379b2 CW	64	/* Clamp size to PAGE_SIZE, test maxnum to avoid overflow */
ba8379b2 CW	65	if (maxnum > PAGE_SIZE/sizeof(struct __fdb_entry))
1da177e4	66	maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);
ba8379b2 CW	67
ba8379b2 CW	68	size = maxnum * sizeof(struct __fdb_entry);
1da177e4 LT	69
	70	buf = kmalloc(size, GFP_USER);
	71	if (!buf)
	72	return -ENOMEM;
9d6f229f	73
1da177e4 LT	74	num = br_fdb_fillbuf(br, buf, maxnum, offset);
	75	if (num > 0) {
	76	if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry)))
	77	num = -EFAULT;
	78	}
	79	kfree(buf);
	80
	81	return num;
	82	}
	83
	84	static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
	85	{
	86	struct net_device *dev;
	87	int ret;
	88
	89	if (!capable(CAP_NET_ADMIN))
	90	return -EPERM;
	91
881d966b	92	dev = dev_get_by_index(&init_net, ifindex);
1da177e4 LT	93	if (dev == NULL)
1da177e4 LT	94	return -EINVAL;
9d6f229f	95
1da177e4 LT	96	if (isadd)
	97	ret = br_add_if(br, dev);
	98	else
	99	ret = br_del_if(br, dev);
	100
	101	dev_put(dev);
	102	return ret;
	103	}
	104
	105	/*
	106	* Legacy ioctl's through SIOCDEVPRIVATE
	107	* This interface is deprecated because it was too difficult to
	108	* to do the translation for 32/64bit ioctl compatability.
	109	*/
	110	static int old_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd)
	111	{
	112	struct net_bridge *br = netdev_priv(dev);
	113	unsigned long args[4];
9d6f229f	114
1da177e4 LT	115	if (copy_from_user(args, rq->ifr_data, sizeof(args)))
	116	return -EFAULT;
	117
	118	switch (args[0]) {
	119	case BRCTL_ADD_IF:
	120	case BRCTL_DEL_IF:
	121	return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF);
	122
	123	case BRCTL_GET_BRIDGE_INFO:
	124	{
	125	struct __bridge_info b;
	126
	127	memset(&b, 0, sizeof(struct __bridge_info));
	128	rcu_read_lock();
	129	memcpy(&b.designated_root, &br->designated_root, 8);
	130	memcpy(&b.bridge_id, &br->bridge_id, 8);
	131	b.root_path_cost = br->root_path_cost;
	132	b.max_age = jiffies_to_clock_t(br->max_age);
	133	b.hello_time = jiffies_to_clock_t(br->hello_time);
	134	b.forward_delay = br->forward_delay;
	135	b.bridge_max_age = br->bridge_max_age;
	136	b.bridge_hello_time = br->bridge_hello_time;
	137	b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay);
	138	b.topology_change = br->topology_change;
	139	b.topology_change_detected = br->topology_change_detected;
	140	b.root_port = br->root_port;
9cde0708 SH	141
9cde0708 SH	142	b.stp_enabled = (br->stp_enabled != BR_NO_STP);
1da177e4 LT	143	b.ageing_time = jiffies_to_clock_t(br->ageing_time);
	144	b.hello_timer_value = br_timer_value(&br->hello_timer);
	145	b.tcn_timer_value = br_timer_value(&br->tcn_timer);
	146	b.topology_change_timer_value = br_timer_value(&br->topology_change_timer);
	147	b.gc_timer_value = br_timer_value(&br->gc_timer);
9d6f229f	148	rcu_read_unlock();
1da177e4 LT	149
	150	if (copy_to_user((void __user *)args[1], &b, sizeof(b)))
	151	return -EFAULT;
	152
	153	return 0;
	154	}
	155
	156	case BRCTL_GET_PORT_LIST:
	157	{
	158	int num, *indices;
	159
	160	num = args[2];
	161	if (num < 0)
	162	return -EINVAL;
	163	if (num == 0)
	164	num = 256;
	165	if (num > BR_MAX_PORTS)
	166	num = BR_MAX_PORTS;
	167
0da974f4	168	indices = kcalloc(num, sizeof(int), GFP_KERNEL);
1da177e4 LT	169	if (indices == NULL)
	170	return -ENOMEM;
	171
1da177e4 LT	172	get_port_ifindices(br, indices, num);
	173	if (copy_to_user((void __user )args[1], indices, numsizeof(int)))
	174	num = -EFAULT;
	175	kfree(indices);
	176	return num;
	177	}
	178
	179	case BRCTL_SET_BRIDGE_FORWARD_DELAY:
	180	if (!capable(CAP_NET_ADMIN))
	181	return -EPERM;
	182
	183	spin_lock_bh(&br->lock);
	184	br->bridge_forward_delay = clock_t_to_jiffies(args[1]);
	185	if (br_is_root_bridge(br))
	186	br->forward_delay = br->bridge_forward_delay;
	187	spin_unlock_bh(&br->lock);
	188	return 0;
	189
	190	case BRCTL_SET_BRIDGE_HELLO_TIME:
8d4698f7 SH	191	{
8d4698f7 SH	192	unsigned long t = clock_t_to_jiffies(args[1]);
1da177e4 LT	193	if (!capable(CAP_NET_ADMIN))
	194	return -EPERM;
	195
8d4698f7 SH	196	if (t < HZ)
	197	return -EINVAL;
	198
1da177e4	199	spin_lock_bh(&br->lock);
8d4698f7	200	br->bridge_hello_time = t;
1da177e4 LT	201	if (br_is_root_bridge(br))
	202	br->hello_time = br->bridge_hello_time;
	203	spin_unlock_bh(&br->lock);
	204	return 0;
8d4698f7	205	}
1da177e4 LT	206
	207	case BRCTL_SET_BRIDGE_MAX_AGE:
	208	if (!capable(CAP_NET_ADMIN))
	209	return -EPERM;
	210
	211	spin_lock_bh(&br->lock);
	212	br->bridge_max_age = clock_t_to_jiffies(args[1]);
	213	if (br_is_root_bridge(br))
	214	br->max_age = br->bridge_max_age;
	215	spin_unlock_bh(&br->lock);
	216	return 0;
	217
	218	case BRCTL_SET_AGEING_TIME:
	219	if (!capable(CAP_NET_ADMIN))
	220	return -EPERM;
	221
	222	br->ageing_time = clock_t_to_jiffies(args[1]);
	223	return 0;
	224
	225	case BRCTL_GET_PORT_INFO:
	226	{
	227	struct __port_info p;
	228	struct net_bridge_port *pt;
	229
	230	rcu_read_lock();
	231	if ((pt = br_get_port(br, args[2])) == NULL) {
	232	rcu_read_unlock();
	233	return -EINVAL;
	234	}
	235
	236	memset(&p, 0, sizeof(struct __port_info));
	237	memcpy(&p.designated_root, &pt->designated_root, 8);
	238	memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
	239	p.port_id = pt->port_id;
	240	p.designated_port = pt->designated_port;
	241	p.path_cost = pt->path_cost;
	242	p.designated_cost = pt->designated_cost;
	243	p.state = pt->state;
	244	p.top_change_ack = pt->topology_change_ack;
	245	p.config_pending = pt->config_pending;
	246	p.message_age_timer_value = br_timer_value(&pt->message_age_timer);
	247	p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer);
	248	p.hold_timer_value = br_timer_value(&pt->hold_timer);
	249
	250	rcu_read_unlock();
	251
	252	if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
	253	return -EFAULT;
	254
	255	return 0;
	256	}
	257
	258	case BRCTL_SET_BRIDGE_STP_STATE:
	259	if (!capable(CAP_NET_ADMIN))
	260	return -EPERM;
	261
9cde0708	262	br_stp_set_enabled(br, args[1]);
1da177e4 LT	263	return 0;
	264
	265	case BRCTL_SET_BRIDGE_PRIORITY:
	266	if (!capable(CAP_NET_ADMIN))
	267	return -EPERM;
	268
	269	spin_lock_bh(&br->lock);
	270	br_stp_set_bridge_priority(br, args[1]);
	271	spin_unlock_bh(&br->lock);
	272	return 0;
	273
	274	case BRCTL_SET_PORT_PRIORITY:
	275	{
	276	struct net_bridge_port *p;
	277	int ret = 0;
	278
	279	if (!capable(CAP_NET_ADMIN))
	280	return -EPERM;
	281
	282	if (args[2] >= (1<<(16-BR_PORT_BITS)))
	283	return -ERANGE;
	284
	285	spin_lock_bh(&br->lock);
9d6f229f	286	if ((p = br_get_port(br, args[1])) == NULL)
1da177e4 LT	287	ret = -EINVAL;
	288	else
	289	br_stp_set_port_priority(p, args[2]);
	290	spin_unlock_bh(&br->lock);
	291	return ret;
	292	}
	293
	294	case BRCTL_SET_PATH_COST:
	295	{
	296	struct net_bridge_port *p;
	297	int ret = 0;
	298
	299	if (!capable(CAP_NET_ADMIN))
	300	return -EPERM;
	301
1da177e4 LT	302	if ((p = br_get_port(br, args[1])) == NULL)
	303	ret = -EINVAL;
	304	else
	305	br_stp_set_path_cost(p, args[2]);
6548cda2	306
1da177e4 LT	307	return ret;
	308	}
	309
	310	case BRCTL_GET_FDB_ENTRIES:
9d6f229f	311	return get_fdb_entries(br, (void __user *)args[1],
1da177e4 LT	312	args[2], args[3]);
	313	}
	314
	315	return -EOPNOTSUPP;
	316	}
	317
	318	static int old_deviceless(void __user *uarg)
	319	{
	320	unsigned long args[3];
	321
	322	if (copy_from_user(args, uarg, sizeof(args)))
	323	return -EFAULT;
	324
	325	switch (args[0]) {
	326	case BRCTL_GET_VERSION:
	327	return BRCTL_VERSION;
	328
	329	case BRCTL_GET_BRIDGES:
	330	{
	331	int *indices;
	332	int ret = 0;
	333
	334	if (args[2] >= 2048)
	335	return -ENOMEM;
0da974f4	336	indices = kcalloc(args[2], sizeof(int), GFP_KERNEL);
1da177e4 LT	337	if (indices == NULL)
	338	return -ENOMEM;
	339
1da177e4 LT	340	args[2] = get_bridge_ifindices(indices, args[2]);
	341
	342	ret = copy_to_user((void __user )args[1], indices, args[2]sizeof(int))
	343	? -EFAULT : args[2];
	344
	345	kfree(indices);
	346	return ret;
	347	}
	348
	349	case BRCTL_ADD_BRIDGE:
	350	case BRCTL_DEL_BRIDGE:
	351	{
	352	char buf[IFNAMSIZ];
	353
	354	if (!capable(CAP_NET_ADMIN))
	355	return -EPERM;
	356
	357	if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
	358	return -EFAULT;
	359
	360	buf[IFNAMSIZ-1] = 0;
	361
	362	if (args[0] == BRCTL_ADD_BRIDGE)
	363	return br_add_bridge(buf);
	364
	365	return br_del_bridge(buf);
	366	}
	367	}
	368
	369	return -EOPNOTSUPP;
	370	}
	371
881d966b	372	int br_ioctl_deviceless_stub(struct net net, unsigned int cmd, void __user uarg)
1da177e4 LT	373	{
	374	switch (cmd) {
	375	case SIOCGIFBR:
	376	case SIOCSIFBR:
	377	return old_deviceless(uarg);
9d6f229f	378
1da177e4 LT	379	case SIOCBRADDBR:
	380	case SIOCBRDELBR:
	381	{
	382	char buf[IFNAMSIZ];
	383
	384	if (!capable(CAP_NET_ADMIN))
	385	return -EPERM;
	386
	387	if (copy_from_user(buf, uarg, IFNAMSIZ))
	388	return -EFAULT;
	389
	390	buf[IFNAMSIZ-1] = 0;
	391	if (cmd == SIOCBRADDBR)
	392	return br_add_bridge(buf);
	393
	394	return br_del_bridge(buf);
	395	}
	396	}
	397	return -EOPNOTSUPP;
	398	}
	399
	400	int br_dev_ioctl(struct net_device dev, struct ifreq rq, int cmd)
	401	{
	402	struct net_bridge *br = netdev_priv(dev);
	403
	404	switch(cmd) {
	405	case SIOCDEVPRIVATE:
	406	return old_dev_ioctl(dev, rq, cmd);
	407
	408	case SIOCBRADDIF:
	409	case SIOCBRDELIF:
	410	return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);
	411
	412	}
	413
	414	pr_debug("Bridge does not support ioctl 0x%x\n", cmd);
	415	return -EOPNOTSUPP;
	416	}