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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/bridge/br_ioctl.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/bridge/br_ioctl.c')
-rw-r--r--net/bridge/br_ioctl.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/net/bridge/br_ioctl.c b/net/bridge/br_ioctl.c
new file mode 100644
index 000000000000..b8ce14b22181
--- /dev/null
+++ b/net/bridge/br_ioctl.c
@@ -0,0 +1,410 @@
1/*
2 * Ioctl handler
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
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
16#include <linux/kernel.h>
17#include <linux/if_bridge.h>
18#include <linux/netdevice.h>
19#include <linux/times.h>
20#include <asm/uaccess.h>
21#include "br_private.h"
22
23/* called with RTNL */
24static int get_bridge_ifindices(int *indices, int num)
25{
26 struct net_device *dev;
27 int i = 0;
28
29 for (dev = dev_base; dev && i < num; dev = dev->next) {
30 if (dev->priv_flags & IFF_EBRIDGE)
31 indices[i++] = dev->ifindex;
32 }
33
34 return i;
35}
36
37/* called with RTNL */
38static void get_port_ifindices(struct net_bridge *br, int *ifindices, int num)
39{
40 struct net_bridge_port *p;
41
42 list_for_each_entry(p, &br->port_list, list) {
43 if (p->port_no < num)
44 ifindices[p->port_no] = p->dev->ifindex;
45 }
46}
47
48/*
49 * Format up to a page worth of forwarding table entries
50 * userbuf -- where to copy result
51 * maxnum -- maximum number of entries desired
52 * (limited to a page for sanity)
53 * offset -- number of records to skip
54 */
55static int get_fdb_entries(struct net_bridge *br, void __user *userbuf,
56 unsigned long maxnum, unsigned long offset)
57{
58 int num;
59 void *buf;
60 size_t size = maxnum * sizeof(struct __fdb_entry);
61
62 if (size > PAGE_SIZE) {
63 size = PAGE_SIZE;
64 maxnum = PAGE_SIZE/sizeof(struct __fdb_entry);
65 }
66
67 buf = kmalloc(size, GFP_USER);
68 if (!buf)
69 return -ENOMEM;
70
71 num = br_fdb_fillbuf(br, buf, maxnum, offset);
72 if (num > 0) {
73 if (copy_to_user(userbuf, buf, num*sizeof(struct __fdb_entry)))
74 num = -EFAULT;
75 }
76 kfree(buf);
77
78 return num;
79}
80
81static int add_del_if(struct net_bridge *br, int ifindex, int isadd)
82{
83 struct net_device *dev;
84 int ret;
85
86 if (!capable(CAP_NET_ADMIN))
87 return -EPERM;
88
89 dev = dev_get_by_index(ifindex);
90 if (dev == NULL)
91 return -EINVAL;
92
93 if (isadd)
94 ret = br_add_if(br, dev);
95 else
96 ret = br_del_if(br, dev);
97
98 dev_put(dev);
99 return ret;
100}
101
102/*
103 * Legacy ioctl's through SIOCDEVPRIVATE
104 * This interface is deprecated because it was too difficult to
105 * to do the translation for 32/64bit ioctl compatability.
106 */
107static int old_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
108{
109 struct net_bridge *br = netdev_priv(dev);
110 unsigned long args[4];
111
112 if (copy_from_user(args, rq->ifr_data, sizeof(args)))
113 return -EFAULT;
114
115 switch (args[0]) {
116 case BRCTL_ADD_IF:
117 case BRCTL_DEL_IF:
118 return add_del_if(br, args[1], args[0] == BRCTL_ADD_IF);
119
120 case BRCTL_GET_BRIDGE_INFO:
121 {
122 struct __bridge_info b;
123
124 memset(&b, 0, sizeof(struct __bridge_info));
125 rcu_read_lock();
126 memcpy(&b.designated_root, &br->designated_root, 8);
127 memcpy(&b.bridge_id, &br->bridge_id, 8);
128 b.root_path_cost = br->root_path_cost;
129 b.max_age = jiffies_to_clock_t(br->max_age);
130 b.hello_time = jiffies_to_clock_t(br->hello_time);
131 b.forward_delay = br->forward_delay;
132 b.bridge_max_age = br->bridge_max_age;
133 b.bridge_hello_time = br->bridge_hello_time;
134 b.bridge_forward_delay = jiffies_to_clock_t(br->bridge_forward_delay);
135 b.topology_change = br->topology_change;
136 b.topology_change_detected = br->topology_change_detected;
137 b.root_port = br->root_port;
138 b.stp_enabled = br->stp_enabled;
139 b.ageing_time = jiffies_to_clock_t(br->ageing_time);
140 b.hello_timer_value = br_timer_value(&br->hello_timer);
141 b.tcn_timer_value = br_timer_value(&br->tcn_timer);
142 b.topology_change_timer_value = br_timer_value(&br->topology_change_timer);
143 b.gc_timer_value = br_timer_value(&br->gc_timer);
144 rcu_read_unlock();
145
146 if (copy_to_user((void __user *)args[1], &b, sizeof(b)))
147 return -EFAULT;
148
149 return 0;
150 }
151
152 case BRCTL_GET_PORT_LIST:
153 {
154 int num, *indices;
155
156 num = args[2];
157 if (num < 0)
158 return -EINVAL;
159 if (num == 0)
160 num = 256;
161 if (num > BR_MAX_PORTS)
162 num = BR_MAX_PORTS;
163
164 indices = kmalloc(num*sizeof(int), GFP_KERNEL);
165 if (indices == NULL)
166 return -ENOMEM;
167
168 memset(indices, 0, num*sizeof(int));
169
170 get_port_ifindices(br, indices, num);
171 if (copy_to_user((void __user *)args[1], indices, num*sizeof(int)))
172 num = -EFAULT;
173 kfree(indices);
174 return num;
175 }
176
177 case BRCTL_SET_BRIDGE_FORWARD_DELAY:
178 if (!capable(CAP_NET_ADMIN))
179 return -EPERM;
180
181 spin_lock_bh(&br->lock);
182 br->bridge_forward_delay = clock_t_to_jiffies(args[1]);
183 if (br_is_root_bridge(br))
184 br->forward_delay = br->bridge_forward_delay;
185 spin_unlock_bh(&br->lock);
186 return 0;
187
188 case BRCTL_SET_BRIDGE_HELLO_TIME:
189 if (!capable(CAP_NET_ADMIN))
190 return -EPERM;
191
192 spin_lock_bh(&br->lock);
193 br->bridge_hello_time = clock_t_to_jiffies(args[1]);
194 if (br_is_root_bridge(br))
195 br->hello_time = br->bridge_hello_time;
196 spin_unlock_bh(&br->lock);
197 return 0;
198
199 case BRCTL_SET_BRIDGE_MAX_AGE:
200 if (!capable(CAP_NET_ADMIN))
201 return -EPERM;
202
203 spin_lock_bh(&br->lock);
204 br->bridge_max_age = clock_t_to_jiffies(args[1]);
205 if (br_is_root_bridge(br))
206 br->max_age = br->bridge_max_age;
207 spin_unlock_bh(&br->lock);
208 return 0;
209
210 case BRCTL_SET_AGEING_TIME:
211 if (!capable(CAP_NET_ADMIN))
212 return -EPERM;
213
214 br->ageing_time = clock_t_to_jiffies(args[1]);
215 return 0;
216
217 case BRCTL_GET_PORT_INFO:
218 {
219 struct __port_info p;
220 struct net_bridge_port *pt;
221
222 rcu_read_lock();
223 if ((pt = br_get_port(br, args[2])) == NULL) {
224 rcu_read_unlock();
225 return -EINVAL;
226 }
227
228 memset(&p, 0, sizeof(struct __port_info));
229 memcpy(&p.designated_root, &pt->designated_root, 8);
230 memcpy(&p.designated_bridge, &pt->designated_bridge, 8);
231 p.port_id = pt->port_id;
232 p.designated_port = pt->designated_port;
233 p.path_cost = pt->path_cost;
234 p.designated_cost = pt->designated_cost;
235 p.state = pt->state;
236 p.top_change_ack = pt->topology_change_ack;
237 p.config_pending = pt->config_pending;
238 p.message_age_timer_value = br_timer_value(&pt->message_age_timer);
239 p.forward_delay_timer_value = br_timer_value(&pt->forward_delay_timer);
240 p.hold_timer_value = br_timer_value(&pt->hold_timer);
241
242 rcu_read_unlock();
243
244 if (copy_to_user((void __user *)args[1], &p, sizeof(p)))
245 return -EFAULT;
246
247 return 0;
248 }
249
250 case BRCTL_SET_BRIDGE_STP_STATE:
251 if (!capable(CAP_NET_ADMIN))
252 return -EPERM;
253
254 br->stp_enabled = args[1]?1:0;
255 return 0;
256
257 case BRCTL_SET_BRIDGE_PRIORITY:
258 if (!capable(CAP_NET_ADMIN))
259 return -EPERM;
260
261 spin_lock_bh(&br->lock);
262 br_stp_set_bridge_priority(br, args[1]);
263 spin_unlock_bh(&br->lock);
264 return 0;
265
266 case BRCTL_SET_PORT_PRIORITY:
267 {
268 struct net_bridge_port *p;
269 int ret = 0;
270
271 if (!capable(CAP_NET_ADMIN))
272 return -EPERM;
273
274 if (args[2] >= (1<<(16-BR_PORT_BITS)))
275 return -ERANGE;
276
277 spin_lock_bh(&br->lock);
278 if ((p = br_get_port(br, args[1])) == NULL)
279 ret = -EINVAL;
280 else
281 br_stp_set_port_priority(p, args[2]);
282 spin_unlock_bh(&br->lock);
283 return ret;
284 }
285
286 case BRCTL_SET_PATH_COST:
287 {
288 struct net_bridge_port *p;
289 int ret = 0;
290
291 if (!capable(CAP_NET_ADMIN))
292 return -EPERM;
293
294 spin_lock_bh(&br->lock);
295 if ((p = br_get_port(br, args[1])) == NULL)
296 ret = -EINVAL;
297 else
298 br_stp_set_path_cost(p, args[2]);
299 spin_unlock_bh(&br->lock);
300 return ret;
301 }
302
303 case BRCTL_GET_FDB_ENTRIES:
304 return get_fdb_entries(br, (void __user *)args[1],
305 args[2], args[3]);
306 }
307
308 return -EOPNOTSUPP;
309}
310
311static int old_deviceless(void __user *uarg)
312{
313 unsigned long args[3];
314
315 if (copy_from_user(args, uarg, sizeof(args)))
316 return -EFAULT;
317
318 switch (args[0]) {
319 case BRCTL_GET_VERSION:
320 return BRCTL_VERSION;
321
322 case BRCTL_GET_BRIDGES:
323 {
324 int *indices;
325 int ret = 0;
326
327 if (args[2] >= 2048)
328 return -ENOMEM;
329 indices = kmalloc(args[2]*sizeof(int), GFP_KERNEL);
330 if (indices == NULL)
331 return -ENOMEM;
332
333 memset(indices, 0, args[2]*sizeof(int));
334 args[2] = get_bridge_ifindices(indices, args[2]);
335
336 ret = copy_to_user((void __user *)args[1], indices, args[2]*sizeof(int))
337 ? -EFAULT : args[2];
338
339 kfree(indices);
340 return ret;
341 }
342
343 case BRCTL_ADD_BRIDGE:
344 case BRCTL_DEL_BRIDGE:
345 {
346 char buf[IFNAMSIZ];
347
348 if (!capable(CAP_NET_ADMIN))
349 return -EPERM;
350
351 if (copy_from_user(buf, (void __user *)args[1], IFNAMSIZ))
352 return -EFAULT;
353
354 buf[IFNAMSIZ-1] = 0;
355
356 if (args[0] == BRCTL_ADD_BRIDGE)
357 return br_add_bridge(buf);
358
359 return br_del_bridge(buf);
360 }
361 }
362
363 return -EOPNOTSUPP;
364}
365
366int br_ioctl_deviceless_stub(unsigned int cmd, void __user *uarg)
367{
368 switch (cmd) {
369 case SIOCGIFBR:
370 case SIOCSIFBR:
371 return old_deviceless(uarg);
372
373 case SIOCBRADDBR:
374 case SIOCBRDELBR:
375 {
376 char buf[IFNAMSIZ];
377
378 if (!capable(CAP_NET_ADMIN))
379 return -EPERM;
380
381 if (copy_from_user(buf, uarg, IFNAMSIZ))
382 return -EFAULT;
383
384 buf[IFNAMSIZ-1] = 0;
385 if (cmd == SIOCBRADDBR)
386 return br_add_bridge(buf);
387
388 return br_del_bridge(buf);
389 }
390 }
391 return -EOPNOTSUPP;
392}
393
394int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
395{
396 struct net_bridge *br = netdev_priv(dev);
397
398 switch(cmd) {
399 case SIOCDEVPRIVATE:
400 return old_dev_ioctl(dev, rq, cmd);
401
402 case SIOCBRADDIF:
403 case SIOCBRDELIF:
404 return add_del_if(br, rq->ifr_ifindex, cmd == SIOCBRADDIF);
405
406 }
407
408 pr_debug("Bridge does not support ioctl 0x%x\n", cmd);
409 return -EOPNOTSUPP;
410}