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1// SPDX-License-Identifier: GPL-2.0
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
21static int dev_ifname(struct net *net, struct ifreq *ifr)
22{
23 ifr->ifr_name[IFNAMSIZ-1] = 0;
24 return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
25}
26
27static gifconf_func_t *gifconf_list[NPROTO];
28
29/**
30 * register_gifconf - register a SIOCGIF handler
31 * @family: Address family
32 * @gifconf: Function handler
33 *
34 * Register protocol dependent address dumping routines. The handler
35 * that is passed must not be freed or reused until it has been replaced
36 * by another handler.
37 */
38int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
39{
40 if (family >= NPROTO)
41 return -EINVAL;
42 gifconf_list[family] = gifconf;
43 return 0;
44}
45EXPORT_SYMBOL(register_gifconf);
46
47/*
48 * Perform a SIOCGIFCONF call. This structure will change
49 * size eventually, and there is nothing I can do about it.
50 * Thus we will need a 'compatibility mode'.
51 */
52
53int dev_ifconf(struct net *net, struct ifconf *ifc, int size)
54{
55 struct net_device *dev;
56 char __user *pos;
57 int len;
58 int total;
59 int i;
60
61 /*
62 * Fetch the caller's info block.
63 */
64
65 pos = ifc->ifc_buf;
66 len = ifc->ifc_len;
67
68 /*
69 * Loop over the interfaces, and write an info block for each.
70 */
71
72 total = 0;
73 for_each_netdev(net, dev) {
74 for (i = 0; i < NPROTO; i++) {
75 if (gifconf_list[i]) {
76 int done;
77 if (!pos)
78 done = gifconf_list[i](dev, NULL, 0, size);
79 else
80 done = gifconf_list[i](dev, pos + total,
81 len - total, size);
82 if (done < 0)
83 return -EFAULT;
84 total += done;
85 }
86 }
87 }
88
89 /*
90 * All done. Write the updated control block back to the caller.
91 */
92 ifc->ifc_len = total;
93
94 /*
95 * Both BSD and Solaris return 0 here, so we do too.
96 */
97 return 0;
98}
99
100/*
101 * Perform the SIOCxIFxxx calls, inside rcu_read_lock()
102 */
103static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
104{
105 int err;
106 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
107
108 if (!dev)
109 return -ENODEV;
110
111 switch (cmd) {
112 case SIOCGIFFLAGS: /* Get interface flags */
113 ifr->ifr_flags = (short) dev_get_flags(dev);
114 return 0;
115
116 case SIOCGIFMETRIC: /* Get the metric on the interface
117 (currently unused) */
118 ifr->ifr_metric = 0;
119 return 0;
120
121 case SIOCGIFMTU: /* Get the MTU of a device */
122 ifr->ifr_mtu = dev->mtu;
123 return 0;
124
125 case SIOCGIFHWADDR:
126 if (!dev->addr_len)
127 memset(ifr->ifr_hwaddr.sa_data, 0,
128 sizeof(ifr->ifr_hwaddr.sa_data));
129 else
130 memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
131 min(sizeof(ifr->ifr_hwaddr.sa_data),
132 (size_t)dev->addr_len));
133 ifr->ifr_hwaddr.sa_family = dev->type;
134 return 0;
135
136 case SIOCGIFSLAVE:
137 err = -EINVAL;
138 break;
139
140 case SIOCGIFMAP:
141 ifr->ifr_map.mem_start = dev->mem_start;
142 ifr->ifr_map.mem_end = dev->mem_end;
143 ifr->ifr_map.base_addr = dev->base_addr;
144 ifr->ifr_map.irq = dev->irq;
145 ifr->ifr_map.dma = dev->dma;
146 ifr->ifr_map.port = dev->if_port;
147 return 0;
148
149 case SIOCGIFINDEX:
150 ifr->ifr_ifindex = dev->ifindex;
151 return 0;
152
153 case SIOCGIFTXQLEN:
154 ifr->ifr_qlen = dev->tx_queue_len;
155 return 0;
156
157 default:
158 /* dev_ioctl() should ensure this case
159 * is never reached
160 */
161 WARN_ON(1);
162 err = -ENOTTY;
163 break;
164
165 }
166 return err;
167}
168
169static int net_hwtstamp_validate(struct ifreq *ifr)
170{
171 struct hwtstamp_config cfg;
172 enum hwtstamp_tx_types tx_type;
173 enum hwtstamp_rx_filters rx_filter;
174 int tx_type_valid = 0;
175 int rx_filter_valid = 0;
176
177 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
178 return -EFAULT;
179
180 if (cfg.flags) /* reserved for future extensions */
181 return -EINVAL;
182
183 tx_type = cfg.tx_type;
184 rx_filter = cfg.rx_filter;
185
186 switch (tx_type) {
187 case HWTSTAMP_TX_OFF:
188 case HWTSTAMP_TX_ON:
189 case HWTSTAMP_TX_ONESTEP_SYNC:
190 tx_type_valid = 1;
191 break;
192 }
193
194 switch (rx_filter) {
195 case HWTSTAMP_FILTER_NONE:
196 case HWTSTAMP_FILTER_ALL:
197 case HWTSTAMP_FILTER_SOME:
198 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
199 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
200 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
201 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
202 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
203 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
204 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
205 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
206 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
207 case HWTSTAMP_FILTER_PTP_V2_EVENT:
208 case HWTSTAMP_FILTER_PTP_V2_SYNC:
209 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
210 case HWTSTAMP_FILTER_NTP_ALL:
211 rx_filter_valid = 1;
212 break;
213 }
214
215 if (!tx_type_valid || !rx_filter_valid)
216 return -ERANGE;
217
218 return 0;
219}
220
221/*
222 * Perform the SIOCxIFxxx calls, inside rtnl_lock()
223 */
224static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
225{
226 int err;
227 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
228 const struct net_device_ops *ops;
229
230 if (!dev)
231 return -ENODEV;
232
233 ops = dev->netdev_ops;
234
235 switch (cmd) {
236 case SIOCSIFFLAGS: /* Set interface flags */
237 return dev_change_flags(dev, ifr->ifr_flags);
238
239 case SIOCSIFMETRIC: /* Set the metric on the interface
240 (currently unused) */
241 return -EOPNOTSUPP;
242
243 case SIOCSIFMTU: /* Set the MTU of a device */
244 return dev_set_mtu(dev, ifr->ifr_mtu);
245
246 case SIOCSIFHWADDR:
247 if (dev->addr_len > sizeof(struct sockaddr))
248 return -EINVAL;
249 return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
250
251 case SIOCSIFHWBROADCAST:
252 if (ifr->ifr_hwaddr.sa_family != dev->type)
253 return -EINVAL;
254 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
255 min(sizeof(ifr->ifr_hwaddr.sa_data),
256 (size_t)dev->addr_len));
257 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
258 return 0;
259
260 case SIOCSIFMAP:
261 if (ops->ndo_set_config) {
262 if (!netif_device_present(dev))
263 return -ENODEV;
264 return ops->ndo_set_config(dev, &ifr->ifr_map);
265 }
266 return -EOPNOTSUPP;
267
268 case SIOCADDMULTI:
269 if (!ops->ndo_set_rx_mode ||
270 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
271 return -EINVAL;
272 if (!netif_device_present(dev))
273 return -ENODEV;
274 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
275
276 case SIOCDELMULTI:
277 if (!ops->ndo_set_rx_mode ||
278 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
279 return -EINVAL;
280 if (!netif_device_present(dev))
281 return -ENODEV;
282 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
283
284 case SIOCSIFTXQLEN:
285 if (ifr->ifr_qlen < 0)
286 return -EINVAL;
287 if (dev->tx_queue_len ^ ifr->ifr_qlen) {
288 unsigned int orig_len = dev->tx_queue_len;
289
290 dev->tx_queue_len = ifr->ifr_qlen;
291 err = call_netdevice_notifiers(
292 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
293 err = notifier_to_errno(err);
294 if (err) {
295 dev->tx_queue_len = orig_len;
296 return err;
297 }
298 }
299 return 0;
300
301 case SIOCSIFNAME:
302 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
303 return dev_change_name(dev, ifr->ifr_newname);
304
305 case SIOCSHWTSTAMP:
306 err = net_hwtstamp_validate(ifr);
307 if (err)
308 return err;
309 /* fall through */
310
311 /*
312 * Unknown or private ioctl
313 */
314 default:
315 if ((cmd >= SIOCDEVPRIVATE &&
316 cmd <= SIOCDEVPRIVATE + 15) ||
317 cmd == SIOCBONDENSLAVE ||
318 cmd == SIOCBONDRELEASE ||
319 cmd == SIOCBONDSETHWADDR ||
320 cmd == SIOCBONDSLAVEINFOQUERY ||
321 cmd == SIOCBONDINFOQUERY ||
322 cmd == SIOCBONDCHANGEACTIVE ||
323 cmd == SIOCGMIIPHY ||
324 cmd == SIOCGMIIREG ||
325 cmd == SIOCSMIIREG ||
326 cmd == SIOCBRADDIF ||
327 cmd == SIOCBRDELIF ||
328 cmd == SIOCSHWTSTAMP ||
329 cmd == SIOCGHWTSTAMP ||
330 cmd == SIOCWANDEV) {
331 err = -EOPNOTSUPP;
332 if (ops->ndo_do_ioctl) {
333 if (netif_device_present(dev))
334 err = ops->ndo_do_ioctl(dev, ifr, cmd);
335 else
336 err = -ENODEV;
337 }
338 } else
339 err = -EINVAL;
340
341 }
342 return err;
343}
344
345/**
346 * dev_load - load a network module
347 * @net: the applicable net namespace
348 * @name: name of interface
349 *
350 * If a network interface is not present and the process has suitable
351 * privileges this function loads the module. If module loading is not
352 * available in this kernel then it becomes a nop.
353 */
354
355void dev_load(struct net *net, const char *name)
356{
357 struct net_device *dev;
358 int no_module;
359
360 rcu_read_lock();
361 dev = dev_get_by_name_rcu(net, name);
362 rcu_read_unlock();
363
364 no_module = !dev;
365 if (no_module && capable(CAP_NET_ADMIN))
366 no_module = request_module("netdev-%s", name);
367 if (no_module && capable(CAP_SYS_MODULE))
368 request_module("%s", name);
369}
370EXPORT_SYMBOL(dev_load);
371
372/*
373 * This function handles all "interface"-type I/O control requests. The actual
374 * 'doing' part of this is dev_ifsioc above.
375 */
376
377/**
378 * dev_ioctl - network device ioctl
379 * @net: the applicable net namespace
380 * @cmd: command to issue
381 * @arg: pointer to a struct ifreq in user space
382 *
383 * Issue ioctl functions to devices. This is normally called by the
384 * user space syscall interfaces but can sometimes be useful for
385 * other purposes. The return value is the return from the syscall if
386 * positive or a negative errno code on error.
387 */
388
389int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_copyout)
390{
391 int ret;
392 char *colon;
393
394 if (need_copyout)
395 *need_copyout = true;
396 if (cmd == SIOCGIFNAME)
397 return dev_ifname(net, ifr);
398
399 ifr->ifr_name[IFNAMSIZ-1] = 0;
400
401 colon = strchr(ifr->ifr_name, ':');
402 if (colon)
403 *colon = 0;
404
405 /*
406 * See which interface the caller is talking about.
407 */
408
409 switch (cmd) {
410 /*
411 * These ioctl calls:
412 * - can be done by all.
413 * - atomic and do not require locking.
414 * - return a value
415 */
416 case SIOCGIFFLAGS:
417 case SIOCGIFMETRIC:
418 case SIOCGIFMTU:
419 case SIOCGIFHWADDR:
420 case SIOCGIFSLAVE:
421 case SIOCGIFMAP:
422 case SIOCGIFINDEX:
423 case SIOCGIFTXQLEN:
424 dev_load(net, ifr->ifr_name);
425 rcu_read_lock();
426 ret = dev_ifsioc_locked(net, ifr, cmd);
427 rcu_read_unlock();
428 if (colon)
429 *colon = ':';
430 return ret;
431
432 case SIOCETHTOOL:
433 dev_load(net, ifr->ifr_name);
434 rtnl_lock();
435 ret = dev_ethtool(net, ifr);
436 rtnl_unlock();
437 if (colon)
438 *colon = ':';
439 return ret;
440
441 /*
442 * These ioctl calls:
443 * - require superuser power.
444 * - require strict serialization.
445 * - return a value
446 */
447 case SIOCGMIIPHY:
448 case SIOCGMIIREG:
449 case SIOCSIFNAME:
450 dev_load(net, ifr->ifr_name);
451 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
452 return -EPERM;
453 rtnl_lock();
454 ret = dev_ifsioc(net, ifr, cmd);
455 rtnl_unlock();
456 if (colon)
457 *colon = ':';
458 return ret;
459
460 /*
461 * These ioctl calls:
462 * - require superuser power.
463 * - require strict serialization.
464 * - do not return a value
465 */
466 case SIOCSIFMAP:
467 case SIOCSIFTXQLEN:
468 if (!capable(CAP_NET_ADMIN))
469 return -EPERM;
470 /* fall through */
471 /*
472 * These ioctl calls:
473 * - require local superuser power.
474 * - require strict serialization.
475 * - do not return a value
476 */
477 case SIOCSIFFLAGS:
478 case SIOCSIFMETRIC:
479 case SIOCSIFMTU:
480 case SIOCSIFHWADDR:
481 case SIOCSIFSLAVE:
482 case SIOCADDMULTI:
483 case SIOCDELMULTI:
484 case SIOCSIFHWBROADCAST:
485 case SIOCSMIIREG:
486 case SIOCBONDENSLAVE:
487 case SIOCBONDRELEASE:
488 case SIOCBONDSETHWADDR:
489 case SIOCBONDCHANGEACTIVE:
490 case SIOCBRADDIF:
491 case SIOCBRDELIF:
492 case SIOCSHWTSTAMP:
493 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
494 return -EPERM;
495 /* fall through */
496 case SIOCBONDSLAVEINFOQUERY:
497 case SIOCBONDINFOQUERY:
498 dev_load(net, ifr->ifr_name);
499 rtnl_lock();
500 ret = dev_ifsioc(net, ifr, cmd);
501 rtnl_unlock();
502 if (need_copyout)
503 *need_copyout = false;
504 return ret;
505
506 case SIOCGIFMEM:
507 /* Get the per device memory space. We can add this but
508 * currently do not support it */
509 case SIOCSIFMEM:
510 /* Set the per device memory buffer space.
511 * Not applicable in our case */
512 case SIOCSIFLINK:
513 return -ENOTTY;
514
515 /*
516 * Unknown or private ioctl.
517 */
518 default:
519 if (cmd == SIOCWANDEV ||
520 cmd == SIOCGHWTSTAMP ||
521 (cmd >= SIOCDEVPRIVATE &&
522 cmd <= SIOCDEVPRIVATE + 15)) {
523 dev_load(net, ifr->ifr_name);
524 rtnl_lock();
525 ret = dev_ifsioc(net, ifr, cmd);
526 rtnl_unlock();
527 return ret;
528 }
529 return -ENOTTY;
530 }
531}
1// SPDX-License-Identifier: GPL-2.0
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
21static int dev_ifname(struct net *net, struct ifreq *ifr)
22{
23 ifr->ifr_name[IFNAMSIZ-1] = 0;
24 return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
25}
26
27static gifconf_func_t *gifconf_list[NPROTO];
28
29/**
30 * register_gifconf - register a SIOCGIF handler
31 * @family: Address family
32 * @gifconf: Function handler
33 *
34 * Register protocol dependent address dumping routines. The handler
35 * that is passed must not be freed or reused until it has been replaced
36 * by another handler.
37 */
38int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
39{
40 if (family >= NPROTO)
41 return -EINVAL;
42 gifconf_list[family] = gifconf;
43 return 0;
44}
45EXPORT_SYMBOL(register_gifconf);
46
47/*
48 * Perform a SIOCGIFCONF call. This structure will change
49 * size eventually, and there is nothing I can do about it.
50 * Thus we will need a 'compatibility mode'.
51 */
52
53int dev_ifconf(struct net *net, struct ifconf *ifc, int size)
54{
55 struct net_device *dev;
56 char __user *pos;
57 int len;
58 int total;
59 int i;
60
61 /*
62 * Fetch the caller's info block.
63 */
64
65 pos = ifc->ifc_buf;
66 len = ifc->ifc_len;
67
68 /*
69 * Loop over the interfaces, and write an info block for each.
70 */
71
72 total = 0;
73 for_each_netdev(net, dev) {
74 for (i = 0; i < NPROTO; i++) {
75 if (gifconf_list[i]) {
76 int done;
77 if (!pos)
78 done = gifconf_list[i](dev, NULL, 0, size);
79 else
80 done = gifconf_list[i](dev, pos + total,
81 len - total, size);
82 if (done < 0)
83 return -EFAULT;
84 total += done;
85 }
86 }
87 }
88
89 /*
90 * All done. Write the updated control block back to the caller.
91 */
92 ifc->ifc_len = total;
93
94 /*
95 * Both BSD and Solaris return 0 here, so we do too.
96 */
97 return 0;
98}
99
100/*
101 * Perform the SIOCxIFxxx calls, inside rcu_read_lock()
102 */
103static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
104{
105 int err;
106 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
107
108 if (!dev)
109 return -ENODEV;
110
111 switch (cmd) {
112 case SIOCGIFFLAGS: /* Get interface flags */
113 ifr->ifr_flags = (short) dev_get_flags(dev);
114 return 0;
115
116 case SIOCGIFMETRIC: /* Get the metric on the interface
117 (currently unused) */
118 ifr->ifr_metric = 0;
119 return 0;
120
121 case SIOCGIFMTU: /* Get the MTU of a device */
122 ifr->ifr_mtu = dev->mtu;
123 return 0;
124
125 case SIOCGIFHWADDR:
126 if (!dev->addr_len)
127 memset(ifr->ifr_hwaddr.sa_data, 0,
128 sizeof(ifr->ifr_hwaddr.sa_data));
129 else
130 memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
131 min(sizeof(ifr->ifr_hwaddr.sa_data),
132 (size_t)dev->addr_len));
133 ifr->ifr_hwaddr.sa_family = dev->type;
134 return 0;
135
136 case SIOCGIFSLAVE:
137 err = -EINVAL;
138 break;
139
140 case SIOCGIFMAP:
141 ifr->ifr_map.mem_start = dev->mem_start;
142 ifr->ifr_map.mem_end = dev->mem_end;
143 ifr->ifr_map.base_addr = dev->base_addr;
144 ifr->ifr_map.irq = dev->irq;
145 ifr->ifr_map.dma = dev->dma;
146 ifr->ifr_map.port = dev->if_port;
147 return 0;
148
149 case SIOCGIFINDEX:
150 ifr->ifr_ifindex = dev->ifindex;
151 return 0;
152
153 case SIOCGIFTXQLEN:
154 ifr->ifr_qlen = dev->tx_queue_len;
155 return 0;
156
157 default:
158 /* dev_ioctl() should ensure this case
159 * is never reached
160 */
161 WARN_ON(1);
162 err = -ENOTTY;
163 break;
164
165 }
166 return err;
167}
168
169static int net_hwtstamp_validate(struct ifreq *ifr)
170{
171 struct hwtstamp_config cfg;
172 enum hwtstamp_tx_types tx_type;
173 enum hwtstamp_rx_filters rx_filter;
174 int tx_type_valid = 0;
175 int rx_filter_valid = 0;
176
177 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
178 return -EFAULT;
179
180 if (cfg.flags) /* reserved for future extensions */
181 return -EINVAL;
182
183 tx_type = cfg.tx_type;
184 rx_filter = cfg.rx_filter;
185
186 switch (tx_type) {
187 case HWTSTAMP_TX_OFF:
188 case HWTSTAMP_TX_ON:
189 case HWTSTAMP_TX_ONESTEP_SYNC:
190 tx_type_valid = 1;
191 break;
192 }
193
194 switch (rx_filter) {
195 case HWTSTAMP_FILTER_NONE:
196 case HWTSTAMP_FILTER_ALL:
197 case HWTSTAMP_FILTER_SOME:
198 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
199 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
200 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
201 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
202 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
203 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
204 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
205 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
206 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
207 case HWTSTAMP_FILTER_PTP_V2_EVENT:
208 case HWTSTAMP_FILTER_PTP_V2_SYNC:
209 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
210 case HWTSTAMP_FILTER_NTP_ALL:
211 rx_filter_valid = 1;
212 break;
213 }
214
215 if (!tx_type_valid || !rx_filter_valid)
216 return -ERANGE;
217
218 return 0;
219}
220
221/*
222 * Perform the SIOCxIFxxx calls, inside rtnl_lock()
223 */
224static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
225{
226 int err;
227 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
228 const struct net_device_ops *ops;
229
230 if (!dev)
231 return -ENODEV;
232
233 ops = dev->netdev_ops;
234
235 switch (cmd) {
236 case SIOCSIFFLAGS: /* Set interface flags */
237 return dev_change_flags(dev, ifr->ifr_flags);
238
239 case SIOCSIFMETRIC: /* Set the metric on the interface
240 (currently unused) */
241 return -EOPNOTSUPP;
242
243 case SIOCSIFMTU: /* Set the MTU of a device */
244 return dev_set_mtu(dev, ifr->ifr_mtu);
245
246 case SIOCSIFHWADDR:
247 if (dev->addr_len > sizeof(struct sockaddr))
248 return -EINVAL;
249 return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
250
251 case SIOCSIFHWBROADCAST:
252 if (ifr->ifr_hwaddr.sa_family != dev->type)
253 return -EINVAL;
254 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
255 min(sizeof(ifr->ifr_hwaddr.sa_data),
256 (size_t)dev->addr_len));
257 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
258 return 0;
259
260 case SIOCSIFMAP:
261 if (ops->ndo_set_config) {
262 if (!netif_device_present(dev))
263 return -ENODEV;
264 return ops->ndo_set_config(dev, &ifr->ifr_map);
265 }
266 return -EOPNOTSUPP;
267
268 case SIOCADDMULTI:
269 if (!ops->ndo_set_rx_mode ||
270 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
271 return -EINVAL;
272 if (!netif_device_present(dev))
273 return -ENODEV;
274 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
275
276 case SIOCDELMULTI:
277 if (!ops->ndo_set_rx_mode ||
278 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
279 return -EINVAL;
280 if (!netif_device_present(dev))
281 return -ENODEV;
282 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
283
284 case SIOCSIFTXQLEN:
285 if (ifr->ifr_qlen < 0)
286 return -EINVAL;
287 if (dev->tx_queue_len ^ ifr->ifr_qlen) {
288 unsigned int orig_len = dev->tx_queue_len;
289
290 dev->tx_queue_len = ifr->ifr_qlen;
291 err = call_netdevice_notifiers(
292 NETDEV_CHANGE_TX_QUEUE_LEN, dev);
293 err = notifier_to_errno(err);
294 if (err) {
295 dev->tx_queue_len = orig_len;
296 return err;
297 }
298 }
299 return 0;
300
301 case SIOCSIFNAME:
302 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
303 return dev_change_name(dev, ifr->ifr_newname);
304
305 case SIOCSHWTSTAMP:
306 err = net_hwtstamp_validate(ifr);
307 if (err)
308 return err;
309 /* fall through */
310
311 /*
312 * Unknown or private ioctl
313 */
314 default:
315 if ((cmd >= SIOCDEVPRIVATE &&
316 cmd <= SIOCDEVPRIVATE + 15) ||
317 cmd == SIOCBONDENSLAVE ||
318 cmd == SIOCBONDRELEASE ||
319 cmd == SIOCBONDSETHWADDR ||
320 cmd == SIOCBONDSLAVEINFOQUERY ||
321 cmd == SIOCBONDINFOQUERY ||
322 cmd == SIOCBONDCHANGEACTIVE ||
323 cmd == SIOCGMIIPHY ||
324 cmd == SIOCGMIIREG ||
325 cmd == SIOCSMIIREG ||
326 cmd == SIOCBRADDIF ||
327 cmd == SIOCBRDELIF ||
328 cmd == SIOCSHWTSTAMP ||
329 cmd == SIOCGHWTSTAMP ||
330 cmd == SIOCWANDEV) {
331 err = -EOPNOTSUPP;
332 if (ops->ndo_do_ioctl) {
333 if (netif_device_present(dev))
334 err = ops->ndo_do_ioctl(dev, ifr, cmd);
335 else
336 err = -ENODEV;
337 }
338 } else
339 err = -EINVAL;
340
341 }
342 return err;
343}
344
345/**
346 * dev_load - load a network module
347 * @net: the applicable net namespace
348 * @name: name of interface
349 *
350 * If a network interface is not present and the process has suitable
351 * privileges this function loads the module. If module loading is not
352 * available in this kernel then it becomes a nop.
353 */
354
355void dev_load(struct net *net, const char *name)
356{
357 struct net_device *dev;
358 int no_module;
359
360 rcu_read_lock();
361 dev = dev_get_by_name_rcu(net, name);
362 rcu_read_unlock();
363
364 no_module = !dev;
365 if (no_module && capable(CAP_NET_ADMIN))
366 no_module = request_module("netdev-%s", name);
367 if (no_module && capable(CAP_SYS_MODULE))
368 request_module("%s", name);
369}
370EXPORT_SYMBOL(dev_load);
371
372/*
373 * This function handles all "interface"-type I/O control requests. The actual
374 * 'doing' part of this is dev_ifsioc above.
375 */
376
377/**
378 * dev_ioctl - network device ioctl
379 * @net: the applicable net namespace
380 * @cmd: command to issue
381 * @arg: pointer to a struct ifreq in user space
382 *
383 * Issue ioctl functions to devices. This is normally called by the
384 * user space syscall interfaces but can sometimes be useful for
385 * other purposes. The return value is the return from the syscall if
386 * positive or a negative errno code on error.
387 */
388
389int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_copyout)
390{
391 int ret;
392 char *colon;
393
394 if (need_copyout)
395 *need_copyout = true;
396 if (cmd == SIOCGIFNAME)
397 return dev_ifname(net, ifr);
398
399 ifr->ifr_name[IFNAMSIZ-1] = 0;
400
401 colon = strchr(ifr->ifr_name, ':');
402 if (colon)
403 *colon = 0;
404
405 /*
406 * See which interface the caller is talking about.
407 */
408
409 switch (cmd) {
410 /*
411 * These ioctl calls:
412 * - can be done by all.
413 * - atomic and do not require locking.
414 * - return a value
415 */
416 case SIOCGIFFLAGS:
417 case SIOCGIFMETRIC:
418 case SIOCGIFMTU:
419 case SIOCGIFHWADDR:
420 case SIOCGIFSLAVE:
421 case SIOCGIFMAP:
422 case SIOCGIFINDEX:
423 case SIOCGIFTXQLEN:
424 dev_load(net, ifr->ifr_name);
425 rcu_read_lock();
426 ret = dev_ifsioc_locked(net, ifr, cmd);
427 rcu_read_unlock();
428 if (colon)
429 *colon = ':';
430 return ret;
431
432 case SIOCETHTOOL:
433 dev_load(net, ifr->ifr_name);
434 rtnl_lock();
435 ret = dev_ethtool(net, ifr);
436 rtnl_unlock();
437 if (colon)
438 *colon = ':';
439 return ret;
440
441 /*
442 * These ioctl calls:
443 * - require superuser power.
444 * - require strict serialization.
445 * - return a value
446 */
447 case SIOCGMIIPHY:
448 case SIOCGMIIREG:
449 case SIOCSIFNAME:
450 dev_load(net, ifr->ifr_name);
451 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
452 return -EPERM;
453 rtnl_lock();
454 ret = dev_ifsioc(net, ifr, cmd);
455 rtnl_unlock();
456 if (colon)
457 *colon = ':';
458 return ret;
459
460 /*
461 * These ioctl calls:
462 * - require superuser power.
463 * - require strict serialization.
464 * - do not return a value
465 */
466 case SIOCSIFMAP:
467 case SIOCSIFTXQLEN:
468 if (!capable(CAP_NET_ADMIN))
469 return -EPERM;
470 /* fall through */
471 /*
472 * These ioctl calls:
473 * - require local superuser power.
474 * - require strict serialization.
475 * - do not return a value
476 */
477 case SIOCSIFFLAGS:
478 case SIOCSIFMETRIC:
479 case SIOCSIFMTU:
480 case SIOCSIFHWADDR:
481 case SIOCSIFSLAVE:
482 case SIOCADDMULTI:
483 case SIOCDELMULTI:
484 case SIOCSIFHWBROADCAST:
485 case SIOCSMIIREG:
486 case SIOCBONDENSLAVE:
487 case SIOCBONDRELEASE:
488 case SIOCBONDSETHWADDR:
489 case SIOCBONDCHANGEACTIVE:
490 case SIOCBRADDIF:
491 case SIOCBRDELIF:
492 case SIOCSHWTSTAMP:
493 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
494 return -EPERM;
495 /* fall through */
496 case SIOCBONDSLAVEINFOQUERY:
497 case SIOCBONDINFOQUERY:
498 dev_load(net, ifr->ifr_name);
499 rtnl_lock();
500 ret = dev_ifsioc(net, ifr, cmd);
501 rtnl_unlock();
502 if (need_copyout)
503 *need_copyout = false;
504 return ret;
505
506 case SIOCGIFMEM:
507 /* Get the per device memory space. We can add this but
508 * currently do not support it */
509 case SIOCSIFMEM:
510 /* Set the per device memory buffer space.
511 * Not applicable in our case */
512 case SIOCSIFLINK:
513 return -ENOTTY;
514
515 /*
516 * Unknown or private ioctl.
517 */
518 default:
519 if (cmd == SIOCWANDEV ||
520 cmd == SIOCGHWTSTAMP ||
521 (cmd >= SIOCDEVPRIVATE &&
522 cmd <= SIOCDEVPRIVATE + 15)) {
523 dev_load(net, ifr->ifr_name);
524 rtnl_lock();
525 ret = dev_ifsioc(net, ifr, cmd);
526 rtnl_unlock();
527 return ret;
528 }
529 return -ENOTTY;
530 }
531}