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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
96b45cbd CW |
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/wext.h> | |
9 | ||
10 | /* | |
11 | * Map an interface index to its name (SIOCGIFNAME) | |
12 | */ | |
13 | ||
14 | /* | |
15 | * We need this ioctl for efficient implementation of the | |
16 | * if_indextoname() function required by the IPv6 API. Without | |
17 | * it, we would have to search all the interfaces to find a | |
18 | * match. --pb | |
19 | */ | |
20 | ||
21 | static int dev_ifname(struct net *net, struct ifreq __user *arg) | |
22 | { | |
96b45cbd | 23 | struct ifreq ifr; |
5dbe7c17 | 24 | int error; |
96b45cbd CW |
25 | |
26 | /* | |
27 | * Fetch the caller's info block. | |
28 | */ | |
29 | ||
30 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) | |
31 | return -EFAULT; | |
63679112 | 32 | ifr.ifr_name[IFNAMSIZ-1] = 0; |
96b45cbd | 33 | |
5dbe7c17 NS |
34 | error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex); |
35 | if (error) | |
36 | return error; | |
96b45cbd CW |
37 | |
38 | if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) | |
39 | return -EFAULT; | |
40 | return 0; | |
41 | } | |
42 | ||
43 | static gifconf_func_t *gifconf_list[NPROTO]; | |
44 | ||
45 | /** | |
46 | * register_gifconf - register a SIOCGIF handler | |
47 | * @family: Address family | |
48 | * @gifconf: Function handler | |
49 | * | |
50 | * Register protocol dependent address dumping routines. The handler | |
51 | * that is passed must not be freed or reused until it has been replaced | |
52 | * by another handler. | |
53 | */ | |
54 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf) | |
55 | { | |
56 | if (family >= NPROTO) | |
57 | return -EINVAL; | |
58 | gifconf_list[family] = gifconf; | |
59 | return 0; | |
60 | } | |
61 | EXPORT_SYMBOL(register_gifconf); | |
62 | ||
63 | /* | |
64 | * Perform a SIOCGIFCONF call. This structure will change | |
65 | * size eventually, and there is nothing I can do about it. | |
66 | * Thus we will need a 'compatibility mode'. | |
67 | */ | |
68 | ||
69 | static int dev_ifconf(struct net *net, char __user *arg) | |
70 | { | |
71 | struct ifconf ifc; | |
72 | struct net_device *dev; | |
73 | char __user *pos; | |
74 | int len; | |
75 | int total; | |
76 | int i; | |
77 | ||
78 | /* | |
79 | * Fetch the caller's info block. | |
80 | */ | |
81 | ||
82 | if (copy_from_user(&ifc, arg, sizeof(struct ifconf))) | |
83 | return -EFAULT; | |
84 | ||
85 | pos = ifc.ifc_buf; | |
86 | len = ifc.ifc_len; | |
87 | ||
88 | /* | |
89 | * Loop over the interfaces, and write an info block for each. | |
90 | */ | |
91 | ||
92 | total = 0; | |
93 | for_each_netdev(net, dev) { | |
94 | for (i = 0; i < NPROTO; i++) { | |
95 | if (gifconf_list[i]) { | |
96 | int done; | |
97 | if (!pos) | |
98 | done = gifconf_list[i](dev, NULL, 0); | |
99 | else | |
100 | done = gifconf_list[i](dev, pos + total, | |
101 | len - total); | |
102 | if (done < 0) | |
103 | return -EFAULT; | |
104 | total += done; | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
109 | /* | |
110 | * All done. Write the updated control block back to the caller. | |
111 | */ | |
112 | ifc.ifc_len = total; | |
113 | ||
114 | /* | |
115 | * Both BSD and Solaris return 0 here, so we do too. | |
116 | */ | |
117 | return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0; | |
118 | } | |
119 | ||
120 | /* | |
121 | * Perform the SIOCxIFxxx calls, inside rcu_read_lock() | |
122 | */ | |
123 | static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd) | |
124 | { | |
125 | int err; | |
126 | struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); | |
127 | ||
128 | if (!dev) | |
129 | return -ENODEV; | |
130 | ||
131 | switch (cmd) { | |
132 | case SIOCGIFFLAGS: /* Get interface flags */ | |
133 | ifr->ifr_flags = (short) dev_get_flags(dev); | |
134 | return 0; | |
135 | ||
136 | case SIOCGIFMETRIC: /* Get the metric on the interface | |
137 | (currently unused) */ | |
138 | ifr->ifr_metric = 0; | |
139 | return 0; | |
140 | ||
141 | case SIOCGIFMTU: /* Get the MTU of a device */ | |
142 | ifr->ifr_mtu = dev->mtu; | |
143 | return 0; | |
144 | ||
145 | case SIOCGIFHWADDR: | |
146 | if (!dev->addr_len) | |
54aeba7f FF |
147 | memset(ifr->ifr_hwaddr.sa_data, 0, |
148 | sizeof(ifr->ifr_hwaddr.sa_data)); | |
96b45cbd CW |
149 | else |
150 | memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr, | |
54aeba7f FF |
151 | min(sizeof(ifr->ifr_hwaddr.sa_data), |
152 | (size_t)dev->addr_len)); | |
96b45cbd CW |
153 | ifr->ifr_hwaddr.sa_family = dev->type; |
154 | return 0; | |
155 | ||
156 | case SIOCGIFSLAVE: | |
157 | err = -EINVAL; | |
158 | break; | |
159 | ||
160 | case SIOCGIFMAP: | |
161 | ifr->ifr_map.mem_start = dev->mem_start; | |
162 | ifr->ifr_map.mem_end = dev->mem_end; | |
163 | ifr->ifr_map.base_addr = dev->base_addr; | |
164 | ifr->ifr_map.irq = dev->irq; | |
165 | ifr->ifr_map.dma = dev->dma; | |
166 | ifr->ifr_map.port = dev->if_port; | |
167 | return 0; | |
168 | ||
169 | case SIOCGIFINDEX: | |
170 | ifr->ifr_ifindex = dev->ifindex; | |
171 | return 0; | |
172 | ||
173 | case SIOCGIFTXQLEN: | |
174 | ifr->ifr_qlen = dev->tx_queue_len; | |
175 | return 0; | |
176 | ||
177 | default: | |
178 | /* dev_ioctl() should ensure this case | |
179 | * is never reached | |
180 | */ | |
181 | WARN_ON(1); | |
182 | err = -ENOTTY; | |
183 | break; | |
184 | ||
185 | } | |
186 | return err; | |
187 | } | |
188 | ||
189 | static int net_hwtstamp_validate(struct ifreq *ifr) | |
190 | { | |
191 | struct hwtstamp_config cfg; | |
192 | enum hwtstamp_tx_types tx_type; | |
193 | enum hwtstamp_rx_filters rx_filter; | |
194 | int tx_type_valid = 0; | |
195 | int rx_filter_valid = 0; | |
196 | ||
197 | if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) | |
198 | return -EFAULT; | |
199 | ||
200 | if (cfg.flags) /* reserved for future extensions */ | |
201 | return -EINVAL; | |
202 | ||
203 | tx_type = cfg.tx_type; | |
204 | rx_filter = cfg.rx_filter; | |
205 | ||
206 | switch (tx_type) { | |
207 | case HWTSTAMP_TX_OFF: | |
208 | case HWTSTAMP_TX_ON: | |
209 | case HWTSTAMP_TX_ONESTEP_SYNC: | |
210 | tx_type_valid = 1; | |
211 | break; | |
212 | } | |
213 | ||
214 | switch (rx_filter) { | |
215 | case HWTSTAMP_FILTER_NONE: | |
216 | case HWTSTAMP_FILTER_ALL: | |
217 | case HWTSTAMP_FILTER_SOME: | |
218 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
219 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
220 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
221 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
222 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
223 | case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: | |
224 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
225 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
226 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
227 | case HWTSTAMP_FILTER_PTP_V2_EVENT: | |
228 | case HWTSTAMP_FILTER_PTP_V2_SYNC: | |
229 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
b8210a9e | 230 | case HWTSTAMP_FILTER_NTP_ALL: |
e3412575 | 231 | rx_filter_valid = 1; |
b8210a9e | 232 | break; |
96b45cbd CW |
233 | } |
234 | ||
235 | if (!tx_type_valid || !rx_filter_valid) | |
236 | return -ERANGE; | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
241 | /* | |
242 | * Perform the SIOCxIFxxx calls, inside rtnl_lock() | |
243 | */ | |
244 | static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd) | |
245 | { | |
246 | int err; | |
247 | struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); | |
248 | const struct net_device_ops *ops; | |
249 | ||
250 | if (!dev) | |
251 | return -ENODEV; | |
252 | ||
253 | ops = dev->netdev_ops; | |
254 | ||
255 | switch (cmd) { | |
256 | case SIOCSIFFLAGS: /* Set interface flags */ | |
257 | return dev_change_flags(dev, ifr->ifr_flags); | |
258 | ||
259 | case SIOCSIFMETRIC: /* Set the metric on the interface | |
260 | (currently unused) */ | |
261 | return -EOPNOTSUPP; | |
262 | ||
263 | case SIOCSIFMTU: /* Set the MTU of a device */ | |
264 | return dev_set_mtu(dev, ifr->ifr_mtu); | |
265 | ||
266 | case SIOCSIFHWADDR: | |
0254e0c6 WC |
267 | if (dev->addr_len > sizeof(struct sockaddr)) |
268 | return -EINVAL; | |
96b45cbd CW |
269 | return dev_set_mac_address(dev, &ifr->ifr_hwaddr); |
270 | ||
271 | case SIOCSIFHWBROADCAST: | |
272 | if (ifr->ifr_hwaddr.sa_family != dev->type) | |
273 | return -EINVAL; | |
274 | memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, | |
54aeba7f FF |
275 | min(sizeof(ifr->ifr_hwaddr.sa_data), |
276 | (size_t)dev->addr_len)); | |
96b45cbd CW |
277 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
278 | return 0; | |
279 | ||
280 | case SIOCSIFMAP: | |
281 | if (ops->ndo_set_config) { | |
282 | if (!netif_device_present(dev)) | |
283 | return -ENODEV; | |
284 | return ops->ndo_set_config(dev, &ifr->ifr_map); | |
285 | } | |
286 | return -EOPNOTSUPP; | |
287 | ||
288 | case SIOCADDMULTI: | |
289 | if (!ops->ndo_set_rx_mode || | |
290 | ifr->ifr_hwaddr.sa_family != AF_UNSPEC) | |
291 | return -EINVAL; | |
292 | if (!netif_device_present(dev)) | |
293 | return -ENODEV; | |
294 | return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); | |
295 | ||
296 | case SIOCDELMULTI: | |
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_del_global(dev, ifr->ifr_hwaddr.sa_data); | |
303 | ||
304 | case SIOCSIFTXQLEN: | |
305 | if (ifr->ifr_qlen < 0) | |
306 | return -EINVAL; | |
823038ca XL |
307 | if (dev->tx_queue_len ^ ifr->ifr_qlen) { |
308 | unsigned int orig_len = dev->tx_queue_len; | |
309 | ||
310 | dev->tx_queue_len = ifr->ifr_qlen; | |
311 | err = call_netdevice_notifiers( | |
312 | NETDEV_CHANGE_TX_QUEUE_LEN, dev); | |
313 | err = notifier_to_errno(err); | |
314 | if (err) { | |
315 | dev->tx_queue_len = orig_len; | |
316 | return err; | |
317 | } | |
318 | } | |
96b45cbd CW |
319 | return 0; |
320 | ||
321 | case SIOCSIFNAME: | |
322 | ifr->ifr_newname[IFNAMSIZ-1] = '\0'; | |
323 | return dev_change_name(dev, ifr->ifr_newname); | |
324 | ||
325 | case SIOCSHWTSTAMP: | |
326 | err = net_hwtstamp_validate(ifr); | |
327 | if (err) | |
328 | return err; | |
329 | /* fall through */ | |
330 | ||
331 | /* | |
332 | * Unknown or private ioctl | |
333 | */ | |
334 | default: | |
335 | if ((cmd >= SIOCDEVPRIVATE && | |
336 | cmd <= SIOCDEVPRIVATE + 15) || | |
337 | cmd == SIOCBONDENSLAVE || | |
338 | cmd == SIOCBONDRELEASE || | |
339 | cmd == SIOCBONDSETHWADDR || | |
340 | cmd == SIOCBONDSLAVEINFOQUERY || | |
341 | cmd == SIOCBONDINFOQUERY || | |
342 | cmd == SIOCBONDCHANGEACTIVE || | |
343 | cmd == SIOCGMIIPHY || | |
344 | cmd == SIOCGMIIREG || | |
345 | cmd == SIOCSMIIREG || | |
346 | cmd == SIOCBRADDIF || | |
347 | cmd == SIOCBRDELIF || | |
348 | cmd == SIOCSHWTSTAMP || | |
fd468c74 | 349 | cmd == SIOCGHWTSTAMP || |
96b45cbd CW |
350 | cmd == SIOCWANDEV) { |
351 | err = -EOPNOTSUPP; | |
352 | if (ops->ndo_do_ioctl) { | |
353 | if (netif_device_present(dev)) | |
354 | err = ops->ndo_do_ioctl(dev, ifr, cmd); | |
355 | else | |
356 | err = -ENODEV; | |
357 | } | |
358 | } else | |
359 | err = -EINVAL; | |
360 | ||
361 | } | |
362 | return err; | |
363 | } | |
364 | ||
365 | /** | |
366 | * dev_load - load a network module | |
367 | * @net: the applicable net namespace | |
368 | * @name: name of interface | |
369 | * | |
370 | * If a network interface is not present and the process has suitable | |
371 | * privileges this function loads the module. If module loading is not | |
372 | * available in this kernel then it becomes a nop. | |
373 | */ | |
374 | ||
375 | void dev_load(struct net *net, const char *name) | |
376 | { | |
377 | struct net_device *dev; | |
378 | int no_module; | |
379 | ||
380 | rcu_read_lock(); | |
381 | dev = dev_get_by_name_rcu(net, name); | |
382 | rcu_read_unlock(); | |
383 | ||
384 | no_module = !dev; | |
385 | if (no_module && capable(CAP_NET_ADMIN)) | |
386 | no_module = request_module("netdev-%s", name); | |
e020836d DB |
387 | if (no_module && capable(CAP_SYS_MODULE)) |
388 | request_module("%s", name); | |
96b45cbd CW |
389 | } |
390 | EXPORT_SYMBOL(dev_load); | |
391 | ||
392 | /* | |
393 | * This function handles all "interface"-type I/O control requests. The actual | |
394 | * 'doing' part of this is dev_ifsioc above. | |
395 | */ | |
396 | ||
397 | /** | |
398 | * dev_ioctl - network device ioctl | |
399 | * @net: the applicable net namespace | |
400 | * @cmd: command to issue | |
401 | * @arg: pointer to a struct ifreq in user space | |
402 | * | |
403 | * Issue ioctl functions to devices. This is normally called by the | |
404 | * user space syscall interfaces but can sometimes be useful for | |
405 | * other purposes. The return value is the return from the syscall if | |
406 | * positive or a negative errno code on error. | |
407 | */ | |
408 | ||
409 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) | |
410 | { | |
411 | struct ifreq ifr; | |
412 | int ret; | |
413 | char *colon; | |
414 | ||
415 | /* One special case: SIOCGIFCONF takes ifconf argument | |
416 | and requires shared lock, because it sleeps writing | |
417 | to user space. | |
418 | */ | |
419 | ||
420 | if (cmd == SIOCGIFCONF) { | |
421 | rtnl_lock(); | |
422 | ret = dev_ifconf(net, (char __user *) arg); | |
423 | rtnl_unlock(); | |
424 | return ret; | |
425 | } | |
426 | if (cmd == SIOCGIFNAME) | |
427 | return dev_ifname(net, (struct ifreq __user *)arg); | |
428 | ||
68dd02d1 JB |
429 | /* |
430 | * Take care of Wireless Extensions. Unfortunately struct iwreq | |
431 | * isn't a proper subset of struct ifreq (it's 8 byte shorter) | |
432 | * so we need to treat it specially, otherwise applications may | |
433 | * fault if the struct they're passing happens to land at the | |
434 | * end of a mapped page. | |
435 | */ | |
436 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { | |
437 | struct iwreq iwr; | |
438 | ||
439 | if (copy_from_user(&iwr, arg, sizeof(iwr))) | |
440 | return -EFAULT; | |
441 | ||
98de4e0e LA |
442 | iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0; |
443 | ||
68dd02d1 JB |
444 | return wext_handle_ioctl(net, &iwr, cmd, arg); |
445 | } | |
446 | ||
96b45cbd CW |
447 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
448 | return -EFAULT; | |
449 | ||
450 | ifr.ifr_name[IFNAMSIZ-1] = 0; | |
451 | ||
452 | colon = strchr(ifr.ifr_name, ':'); | |
453 | if (colon) | |
454 | *colon = 0; | |
455 | ||
456 | /* | |
457 | * See which interface the caller is talking about. | |
458 | */ | |
459 | ||
460 | switch (cmd) { | |
461 | /* | |
462 | * These ioctl calls: | |
463 | * - can be done by all. | |
464 | * - atomic and do not require locking. | |
465 | * - return a value | |
466 | */ | |
467 | case SIOCGIFFLAGS: | |
468 | case SIOCGIFMETRIC: | |
469 | case SIOCGIFMTU: | |
470 | case SIOCGIFHWADDR: | |
471 | case SIOCGIFSLAVE: | |
472 | case SIOCGIFMAP: | |
473 | case SIOCGIFINDEX: | |
474 | case SIOCGIFTXQLEN: | |
475 | dev_load(net, ifr.ifr_name); | |
476 | rcu_read_lock(); | |
477 | ret = dev_ifsioc_locked(net, &ifr, cmd); | |
478 | rcu_read_unlock(); | |
479 | if (!ret) { | |
480 | if (colon) | |
481 | *colon = ':'; | |
482 | if (copy_to_user(arg, &ifr, | |
483 | sizeof(struct ifreq))) | |
484 | ret = -EFAULT; | |
485 | } | |
486 | return ret; | |
487 | ||
488 | case SIOCETHTOOL: | |
489 | dev_load(net, ifr.ifr_name); | |
490 | rtnl_lock(); | |
491 | ret = dev_ethtool(net, &ifr); | |
492 | rtnl_unlock(); | |
493 | if (!ret) { | |
494 | if (colon) | |
495 | *colon = ':'; | |
496 | if (copy_to_user(arg, &ifr, | |
497 | sizeof(struct ifreq))) | |
498 | ret = -EFAULT; | |
499 | } | |
500 | return ret; | |
501 | ||
502 | /* | |
503 | * These ioctl calls: | |
504 | * - require superuser power. | |
505 | * - require strict serialization. | |
506 | * - return a value | |
507 | */ | |
508 | case SIOCGMIIPHY: | |
509 | case SIOCGMIIREG: | |
510 | case SIOCSIFNAME: | |
511 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
512 | return -EPERM; | |
513 | dev_load(net, ifr.ifr_name); | |
514 | rtnl_lock(); | |
515 | ret = dev_ifsioc(net, &ifr, cmd); | |
516 | rtnl_unlock(); | |
517 | if (!ret) { | |
518 | if (colon) | |
519 | *colon = ':'; | |
520 | if (copy_to_user(arg, &ifr, | |
521 | sizeof(struct ifreq))) | |
522 | ret = -EFAULT; | |
523 | } | |
524 | return ret; | |
525 | ||
526 | /* | |
527 | * These ioctl calls: | |
528 | * - require superuser power. | |
529 | * - require strict serialization. | |
530 | * - do not return a value | |
531 | */ | |
532 | case SIOCSIFMAP: | |
533 | case SIOCSIFTXQLEN: | |
534 | if (!capable(CAP_NET_ADMIN)) | |
535 | return -EPERM; | |
536 | /* fall through */ | |
537 | /* | |
538 | * These ioctl calls: | |
539 | * - require local superuser power. | |
540 | * - require strict serialization. | |
541 | * - do not return a value | |
542 | */ | |
543 | case SIOCSIFFLAGS: | |
544 | case SIOCSIFMETRIC: | |
545 | case SIOCSIFMTU: | |
546 | case SIOCSIFHWADDR: | |
547 | case SIOCSIFSLAVE: | |
548 | case SIOCADDMULTI: | |
549 | case SIOCDELMULTI: | |
550 | case SIOCSIFHWBROADCAST: | |
551 | case SIOCSMIIREG: | |
552 | case SIOCBONDENSLAVE: | |
553 | case SIOCBONDRELEASE: | |
554 | case SIOCBONDSETHWADDR: | |
555 | case SIOCBONDCHANGEACTIVE: | |
556 | case SIOCBRADDIF: | |
557 | case SIOCBRDELIF: | |
558 | case SIOCSHWTSTAMP: | |
559 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
560 | return -EPERM; | |
561 | /* fall through */ | |
562 | case SIOCBONDSLAVEINFOQUERY: | |
563 | case SIOCBONDINFOQUERY: | |
564 | dev_load(net, ifr.ifr_name); | |
565 | rtnl_lock(); | |
566 | ret = dev_ifsioc(net, &ifr, cmd); | |
567 | rtnl_unlock(); | |
568 | return ret; | |
569 | ||
570 | case SIOCGIFMEM: | |
571 | /* Get the per device memory space. We can add this but | |
572 | * currently do not support it */ | |
573 | case SIOCSIFMEM: | |
574 | /* Set the per device memory buffer space. | |
575 | * Not applicable in our case */ | |
576 | case SIOCSIFLINK: | |
577 | return -ENOTTY; | |
578 | ||
579 | /* | |
580 | * Unknown or private ioctl. | |
581 | */ | |
582 | default: | |
583 | if (cmd == SIOCWANDEV || | |
fd468c74 | 584 | cmd == SIOCGHWTSTAMP || |
96b45cbd CW |
585 | (cmd >= SIOCDEVPRIVATE && |
586 | cmd <= SIOCDEVPRIVATE + 15)) { | |
587 | dev_load(net, ifr.ifr_name); | |
588 | rtnl_lock(); | |
589 | ret = dev_ifsioc(net, &ifr, cmd); | |
590 | rtnl_unlock(); | |
591 | if (!ret && copy_to_user(arg, &ifr, | |
592 | sizeof(struct ifreq))) | |
593 | ret = -EFAULT; | |
594 | return ret; | |
595 | } | |
96b45cbd CW |
596 | return -ENOTTY; |
597 | } | |
598 | } |