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