1
2#include <linux/kmod.h>
3#include <linux/netdevice.h>
4#include <linux/etherdevice.h>
5#include <linux/rtnetlink.h>
6#include <linux/net_tstamp.h>
7#include <linux/wireless.h>
8#include <net/dsa.h>
9#include <net/wext.h>
10
11
12
13
14
15
16
17
18
19
20
21
22static int dev_ifname(struct net *net, struct ifreq *ifr)
23{
24 ifr->ifr_name[IFNAMSIZ-1] = 0;
25 return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
26}
27
28static gifconf_func_t *gifconf_list[NPROTO];
29
30
31
32
33
34
35
36
37
38
39int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
40{
41 if (family >= NPROTO)
42 return -EINVAL;
43 gifconf_list[family] = gifconf;
44 return 0;
45}
46EXPORT_SYMBOL(register_gifconf);
47
48
49
50
51
52
53
54int dev_ifconf(struct net *net, struct ifconf *ifc, int size)
55{
56 struct net_device *dev;
57 char __user *pos;
58 int len;
59 int total;
60 int i;
61
62
63
64
65
66 pos = ifc->ifc_buf;
67 len = ifc->ifc_len;
68
69
70
71
72
73 total = 0;
74 for_each_netdev(net, dev) {
75 for (i = 0; i < NPROTO; i++) {
76 if (gifconf_list[i]) {
77 int done;
78 if (!pos)
79 done = gifconf_list[i](dev, NULL, 0, size);
80 else
81 done = gifconf_list[i](dev, pos + total,
82 len - total, size);
83 if (done < 0)
84 return -EFAULT;
85 total += done;
86 }
87 }
88 }
89
90
91
92
93 ifc->ifc_len = total;
94
95
96
97
98 return 0;
99}
100
101
102
103
104static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
105{
106 int err;
107 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
108
109 if (!dev)
110 return -ENODEV;
111
112 switch (cmd) {
113 case SIOCGIFFLAGS:
114 ifr->ifr_flags = (short) dev_get_flags(dev);
115 return 0;
116
117 case SIOCGIFMETRIC:
118
119 ifr->ifr_metric = 0;
120 return 0;
121
122 case SIOCGIFMTU:
123 ifr->ifr_mtu = dev->mtu;
124 return 0;
125
126 case SIOCGIFHWADDR:
127 if (!dev->addr_len)
128 memset(ifr->ifr_hwaddr.sa_data, 0,
129 sizeof(ifr->ifr_hwaddr.sa_data));
130 else
131 memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
132 min(sizeof(ifr->ifr_hwaddr.sa_data),
133 (size_t)dev->addr_len));
134 ifr->ifr_hwaddr.sa_family = dev->type;
135 return 0;
136
137 case SIOCGIFSLAVE:
138 err = -EINVAL;
139 break;
140
141 case SIOCGIFMAP:
142 ifr->ifr_map.mem_start = dev->mem_start;
143 ifr->ifr_map.mem_end = dev->mem_end;
144 ifr->ifr_map.base_addr = dev->base_addr;
145 ifr->ifr_map.irq = dev->irq;
146 ifr->ifr_map.dma = dev->dma;
147 ifr->ifr_map.port = dev->if_port;
148 return 0;
149
150 case SIOCGIFINDEX:
151 ifr->ifr_ifindex = dev->ifindex;
152 return 0;
153
154 case SIOCGIFTXQLEN:
155 ifr->ifr_qlen = dev->tx_queue_len;
156 return 0;
157
158 default:
159
160
161
162 WARN_ON(1);
163 err = -ENOTTY;
164 break;
165
166 }
167 return err;
168}
169
170static int net_hwtstamp_validate(struct ifreq *ifr)
171{
172 struct hwtstamp_config cfg;
173 enum hwtstamp_tx_types tx_type;
174 enum hwtstamp_rx_filters rx_filter;
175 int tx_type_valid = 0;
176 int rx_filter_valid = 0;
177
178 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
179 return -EFAULT;
180
181 if (cfg.flags)
182 return -EINVAL;
183
184 tx_type = cfg.tx_type;
185 rx_filter = cfg.rx_filter;
186
187 switch (tx_type) {
188 case HWTSTAMP_TX_OFF:
189 case HWTSTAMP_TX_ON:
190 case HWTSTAMP_TX_ONESTEP_SYNC:
191 case HWTSTAMP_TX_ONESTEP_P2P:
192 tx_type_valid = 1;
193 break;
194 case __HWTSTAMP_TX_CNT:
195
196 break;
197 }
198
199 switch (rx_filter) {
200 case HWTSTAMP_FILTER_NONE:
201 case HWTSTAMP_FILTER_ALL:
202 case HWTSTAMP_FILTER_SOME:
203 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
204 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
205 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
206 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
207 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
208 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
209 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
210 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
211 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
212 case HWTSTAMP_FILTER_PTP_V2_EVENT:
213 case HWTSTAMP_FILTER_PTP_V2_SYNC:
214 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
215 case HWTSTAMP_FILTER_NTP_ALL:
216 rx_filter_valid = 1;
217 break;
218 case __HWTSTAMP_FILTER_CNT:
219
220 break;
221 }
222
223 if (!tx_type_valid || !rx_filter_valid)
224 return -ERANGE;
225
226 return 0;
227}
228
229static int dev_do_ioctl(struct net_device *dev,
230 struct ifreq *ifr, unsigned int cmd)
231{
232 const struct net_device_ops *ops = dev->netdev_ops;
233 int err = -EOPNOTSUPP;
234
235 err = dsa_ndo_do_ioctl(dev, ifr, cmd);
236 if (err == 0 || err != -EOPNOTSUPP)
237 return err;
238
239 if (ops->ndo_do_ioctl) {
240 if (netif_device_present(dev))
241 err = ops->ndo_do_ioctl(dev, ifr, cmd);
242 else
243 err = -ENODEV;
244 }
245
246 return err;
247}
248
249
250
251
252static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
253{
254 int err;
255 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
256 const struct net_device_ops *ops;
257
258 if (!dev)
259 return -ENODEV;
260
261 ops = dev->netdev_ops;
262
263 switch (cmd) {
264 case SIOCSIFFLAGS:
265 return dev_change_flags(dev, ifr->ifr_flags, NULL);
266
267 case SIOCSIFMETRIC:
268
269 return -EOPNOTSUPP;
270
271 case SIOCSIFMTU:
272 return dev_set_mtu(dev, ifr->ifr_mtu);
273
274 case SIOCSIFHWADDR:
275 if (dev->addr_len > sizeof(struct sockaddr))
276 return -EINVAL;
277 return dev_set_mac_address(dev, &ifr->ifr_hwaddr, NULL);
278
279 case SIOCSIFHWBROADCAST:
280 if (ifr->ifr_hwaddr.sa_family != dev->type)
281 return -EINVAL;
282 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
283 min(sizeof(ifr->ifr_hwaddr.sa_data),
284 (size_t)dev->addr_len));
285 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
286 return 0;
287
288 case SIOCSIFMAP:
289 if (ops->ndo_set_config) {
290 if (!netif_device_present(dev))
291 return -ENODEV;
292 return ops->ndo_set_config(dev, &ifr->ifr_map);
293 }
294 return -EOPNOTSUPP;
295
296 case SIOCADDMULTI:
297 if (!ops->ndo_set_rx_mode ||
298 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
299 return -EINVAL;
300 if (!netif_device_present(dev))
301 return -ENODEV;
302 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
303
304 case SIOCDELMULTI:
305 if (!ops->ndo_set_rx_mode ||
306 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
307 return -EINVAL;
308 if (!netif_device_present(dev))
309 return -ENODEV;
310 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
311
312 case SIOCSIFTXQLEN:
313 if (ifr->ifr_qlen < 0)
314 return -EINVAL;
315 return dev_change_tx_queue_len(dev, ifr->ifr_qlen);
316
317 case SIOCSIFNAME:
318 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
319 return dev_change_name(dev, ifr->ifr_newname);
320
321 case SIOCSHWTSTAMP:
322 err = net_hwtstamp_validate(ifr);
323 if (err)
324 return err;
325 fallthrough;
326
327
328
329
330 default:
331 if ((cmd >= SIOCDEVPRIVATE &&
332 cmd <= SIOCDEVPRIVATE + 15) ||
333 cmd == SIOCBONDENSLAVE ||
334 cmd == SIOCBONDRELEASE ||
335 cmd == SIOCBONDSETHWADDR ||
336 cmd == SIOCBONDSLAVEINFOQUERY ||
337 cmd == SIOCBONDINFOQUERY ||
338 cmd == SIOCBONDCHANGEACTIVE ||
339 cmd == SIOCGMIIPHY ||
340 cmd == SIOCGMIIREG ||
341 cmd == SIOCSMIIREG ||
342 cmd == SIOCBRADDIF ||
343 cmd == SIOCBRDELIF ||
344 cmd == SIOCSHWTSTAMP ||
345 cmd == SIOCGHWTSTAMP ||
346 cmd == SIOCWANDEV) {
347 err = dev_do_ioctl(dev, ifr, cmd);
348 } else
349 err = -EINVAL;
350
351 }
352 return err;
353}
354
355
356
357
358
359
360
361
362
363
364
365void dev_load(struct net *net, const char *name)
366{
367 struct net_device *dev;
368 int no_module;
369
370 rcu_read_lock();
371 dev = dev_get_by_name_rcu(net, name);
372 rcu_read_unlock();
373
374 no_module = !dev;
375 if (no_module && capable(CAP_NET_ADMIN))
376 no_module = request_module("netdev-%s", name);
377 if (no_module && capable(CAP_SYS_MODULE))
378 request_module("%s", name);
379}
380EXPORT_SYMBOL(dev_load);
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_copyout)
401{
402 int ret;
403 char *colon;
404
405 if (need_copyout)
406 *need_copyout = true;
407 if (cmd == SIOCGIFNAME)
408 return dev_ifname(net, ifr);
409
410 ifr->ifr_name[IFNAMSIZ-1] = 0;
411
412 colon = strchr(ifr->ifr_name, ':');
413 if (colon)
414 *colon = 0;
415
416
417
418
419
420 switch (cmd) {
421
422
423
424
425
426
427 case SIOCGIFFLAGS:
428 case SIOCGIFMETRIC:
429 case SIOCGIFMTU:
430 case SIOCGIFHWADDR:
431 case SIOCGIFSLAVE:
432 case SIOCGIFMAP:
433 case SIOCGIFINDEX:
434 case SIOCGIFTXQLEN:
435 dev_load(net, ifr->ifr_name);
436 rcu_read_lock();
437 ret = dev_ifsioc_locked(net, ifr, cmd);
438 rcu_read_unlock();
439 if (colon)
440 *colon = ':';
441 return ret;
442
443 case SIOCETHTOOL:
444 dev_load(net, ifr->ifr_name);
445 rtnl_lock();
446 ret = dev_ethtool(net, ifr);
447 rtnl_unlock();
448 if (colon)
449 *colon = ':';
450 return ret;
451
452
453
454
455
456
457
458 case SIOCGMIIPHY:
459 case SIOCGMIIREG:
460 case SIOCSIFNAME:
461 dev_load(net, ifr->ifr_name);
462 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
463 return -EPERM;
464 rtnl_lock();
465 ret = dev_ifsioc(net, ifr, cmd);
466 rtnl_unlock();
467 if (colon)
468 *colon = ':';
469 return ret;
470
471
472
473
474
475
476
477 case SIOCSIFMAP:
478 case SIOCSIFTXQLEN:
479 if (!capable(CAP_NET_ADMIN))
480 return -EPERM;
481 fallthrough;
482
483
484
485
486
487
488 case SIOCSIFFLAGS:
489 case SIOCSIFMETRIC:
490 case SIOCSIFMTU:
491 case SIOCSIFHWADDR:
492 case SIOCSIFSLAVE:
493 case SIOCADDMULTI:
494 case SIOCDELMULTI:
495 case SIOCSIFHWBROADCAST:
496 case SIOCSMIIREG:
497 case SIOCBONDENSLAVE:
498 case SIOCBONDRELEASE:
499 case SIOCBONDSETHWADDR:
500 case SIOCBONDCHANGEACTIVE:
501 case SIOCBRADDIF:
502 case SIOCBRDELIF:
503 case SIOCSHWTSTAMP:
504 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
505 return -EPERM;
506 fallthrough;
507 case SIOCBONDSLAVEINFOQUERY:
508 case SIOCBONDINFOQUERY:
509 dev_load(net, ifr->ifr_name);
510 rtnl_lock();
511 ret = dev_ifsioc(net, ifr, cmd);
512 rtnl_unlock();
513 if (need_copyout)
514 *need_copyout = false;
515 return ret;
516
517 case SIOCGIFMEM:
518
519
520 case SIOCSIFMEM:
521
522
523 case SIOCSIFLINK:
524 return -ENOTTY;
525
526
527
528
529 default:
530 if (cmd == SIOCWANDEV ||
531 cmd == SIOCGHWTSTAMP ||
532 (cmd >= SIOCDEVPRIVATE &&
533 cmd <= SIOCDEVPRIVATE + 15)) {
534 dev_load(net, ifr->ifr_name);
535 rtnl_lock();
536 ret = dev_ifsioc(net, ifr, cmd);
537 rtnl_unlock();
538 return ret;
539 }
540 return -ENOTTY;
541 }
542}
543