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1#include <linux/kmod.h>
2#include <linux/netdevice.h>
3#include <linux/etherdevice.h>
4#include <linux/rtnetlink.h>
5#include <linux/net_tstamp.h>
6#include <linux/wireless.h>
7#include <net/wext.h>
8
9/*
10 * Map an interface index to its name (SIOCGIFNAME)
11 */
12
13/*
14 * We need this ioctl for efficient implementation of the
15 * if_indextoname() function required by the IPv6 API. Without
16 * it, we would have to search all the interfaces to find a
17 * match. --pb
18 */
19
20static int dev_ifname(struct net *net, struct ifreq __user *arg)
21{
22 struct ifreq ifr;
23 int error;
24
25 /*
26 * Fetch the caller's info block.
27 */
28
29 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
30 return -EFAULT;
31
32 error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex);
33 if (error)
34 return error;
35
36 if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
37 return -EFAULT;
38 return 0;
39}
40
41static gifconf_func_t *gifconf_list[NPROTO];
42
43/**
44 * register_gifconf - register a SIOCGIF handler
45 * @family: Address family
46 * @gifconf: Function handler
47 *
48 * Register protocol dependent address dumping routines. The handler
49 * that is passed must not be freed or reused until it has been replaced
50 * by another handler.
51 */
52int register_gifconf(unsigned int family, gifconf_func_t *gifconf)
53{
54 if (family >= NPROTO)
55 return -EINVAL;
56 gifconf_list[family] = gifconf;
57 return 0;
58}
59EXPORT_SYMBOL(register_gifconf);
60
61/*
62 * Perform a SIOCGIFCONF call. This structure will change
63 * size eventually, and there is nothing I can do about it.
64 * Thus we will need a 'compatibility mode'.
65 */
66
67static int dev_ifconf(struct net *net, char __user *arg)
68{
69 struct ifconf ifc;
70 struct net_device *dev;
71 char __user *pos;
72 int len;
73 int total;
74 int i;
75
76 /*
77 * Fetch the caller's info block.
78 */
79
80 if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
81 return -EFAULT;
82
83 pos = ifc.ifc_buf;
84 len = ifc.ifc_len;
85
86 /*
87 * Loop over the interfaces, and write an info block for each.
88 */
89
90 total = 0;
91 for_each_netdev(net, dev) {
92 for (i = 0; i < NPROTO; i++) {
93 if (gifconf_list[i]) {
94 int done;
95 if (!pos)
96 done = gifconf_list[i](dev, NULL, 0);
97 else
98 done = gifconf_list[i](dev, pos + total,
99 len - total);
100 if (done < 0)
101 return -EFAULT;
102 total += done;
103 }
104 }
105 }
106
107 /*
108 * All done. Write the updated control block back to the caller.
109 */
110 ifc.ifc_len = total;
111
112 /*
113 * Both BSD and Solaris return 0 here, so we do too.
114 */
115 return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
116}
117
118/*
119 * Perform the SIOCxIFxxx calls, inside rcu_read_lock()
120 */
121static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd)
122{
123 int err;
124 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name);
125
126 if (!dev)
127 return -ENODEV;
128
129 switch (cmd) {
130 case SIOCGIFFLAGS: /* Get interface flags */
131 ifr->ifr_flags = (short) dev_get_flags(dev);
132 return 0;
133
134 case SIOCGIFMETRIC: /* Get the metric on the interface
135 (currently unused) */
136 ifr->ifr_metric = 0;
137 return 0;
138
139 case SIOCGIFMTU: /* Get the MTU of a device */
140 ifr->ifr_mtu = dev->mtu;
141 return 0;
142
143 case SIOCGIFHWADDR:
144 if (!dev->addr_len)
145 memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data);
146 else
147 memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
148 min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
149 ifr->ifr_hwaddr.sa_family = dev->type;
150 return 0;
151
152 case SIOCGIFSLAVE:
153 err = -EINVAL;
154 break;
155
156 case SIOCGIFMAP:
157 ifr->ifr_map.mem_start = dev->mem_start;
158 ifr->ifr_map.mem_end = dev->mem_end;
159 ifr->ifr_map.base_addr = dev->base_addr;
160 ifr->ifr_map.irq = dev->irq;
161 ifr->ifr_map.dma = dev->dma;
162 ifr->ifr_map.port = dev->if_port;
163 return 0;
164
165 case SIOCGIFINDEX:
166 ifr->ifr_ifindex = dev->ifindex;
167 return 0;
168
169 case SIOCGIFTXQLEN:
170 ifr->ifr_qlen = dev->tx_queue_len;
171 return 0;
172
173 default:
174 /* dev_ioctl() should ensure this case
175 * is never reached
176 */
177 WARN_ON(1);
178 err = -ENOTTY;
179 break;
180
181 }
182 return err;
183}
184
185static int net_hwtstamp_validate(struct ifreq *ifr)
186{
187 struct hwtstamp_config cfg;
188 enum hwtstamp_tx_types tx_type;
189 enum hwtstamp_rx_filters rx_filter;
190 int tx_type_valid = 0;
191 int rx_filter_valid = 0;
192
193 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
194 return -EFAULT;
195
196 if (cfg.flags) /* reserved for future extensions */
197 return -EINVAL;
198
199 tx_type = cfg.tx_type;
200 rx_filter = cfg.rx_filter;
201
202 switch (tx_type) {
203 case HWTSTAMP_TX_OFF:
204 case HWTSTAMP_TX_ON:
205 case HWTSTAMP_TX_ONESTEP_SYNC:
206 tx_type_valid = 1;
207 break;
208 }
209
210 switch (rx_filter) {
211 case HWTSTAMP_FILTER_NONE:
212 case HWTSTAMP_FILTER_ALL:
213 case HWTSTAMP_FILTER_SOME:
214 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
215 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
216 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
217 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
218 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
219 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
220 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
221 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
222 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
223 case HWTSTAMP_FILTER_PTP_V2_EVENT:
224 case HWTSTAMP_FILTER_PTP_V2_SYNC:
225 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
226 rx_filter_valid = 1;
227 break;
228 }
229
230 if (!tx_type_valid || !rx_filter_valid)
231 return -ERANGE;
232
233 return 0;
234}
235
236/*
237 * Perform the SIOCxIFxxx calls, inside rtnl_lock()
238 */
239static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
240{
241 int err;
242 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
243 const struct net_device_ops *ops;
244
245 if (!dev)
246 return -ENODEV;
247
248 ops = dev->netdev_ops;
249
250 switch (cmd) {
251 case SIOCSIFFLAGS: /* Set interface flags */
252 return dev_change_flags(dev, ifr->ifr_flags);
253
254 case SIOCSIFMETRIC: /* Set the metric on the interface
255 (currently unused) */
256 return -EOPNOTSUPP;
257
258 case SIOCSIFMTU: /* Set the MTU of a device */
259 return dev_set_mtu(dev, ifr->ifr_mtu);
260
261 case SIOCSIFHWADDR:
262 return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
263
264 case SIOCSIFHWBROADCAST:
265 if (ifr->ifr_hwaddr.sa_family != dev->type)
266 return -EINVAL;
267 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
268 min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
269 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
270 return 0;
271
272 case SIOCSIFMAP:
273 if (ops->ndo_set_config) {
274 if (!netif_device_present(dev))
275 return -ENODEV;
276 return ops->ndo_set_config(dev, &ifr->ifr_map);
277 }
278 return -EOPNOTSUPP;
279
280 case SIOCADDMULTI:
281 if (!ops->ndo_set_rx_mode ||
282 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
283 return -EINVAL;
284 if (!netif_device_present(dev))
285 return -ENODEV;
286 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
287
288 case SIOCDELMULTI:
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_del_global(dev, ifr->ifr_hwaddr.sa_data);
295
296 case SIOCSIFTXQLEN:
297 if (ifr->ifr_qlen < 0)
298 return -EINVAL;
299 dev->tx_queue_len = ifr->ifr_qlen;
300 return 0;
301
302 case SIOCSIFNAME:
303 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
304 return dev_change_name(dev, ifr->ifr_newname);
305
306 case SIOCSHWTSTAMP:
307 err = net_hwtstamp_validate(ifr);
308 if (err)
309 return err;
310 /* fall through */
311
312 /*
313 * Unknown or private ioctl
314 */
315 default:
316 if ((cmd >= SIOCDEVPRIVATE &&
317 cmd <= SIOCDEVPRIVATE + 15) ||
318 cmd == SIOCBONDENSLAVE ||
319 cmd == SIOCBONDRELEASE ||
320 cmd == SIOCBONDSETHWADDR ||
321 cmd == SIOCBONDSLAVEINFOQUERY ||
322 cmd == SIOCBONDINFOQUERY ||
323 cmd == SIOCBONDCHANGEACTIVE ||
324 cmd == SIOCGMIIPHY ||
325 cmd == SIOCGMIIREG ||
326 cmd == SIOCSMIIREG ||
327 cmd == SIOCBRADDIF ||
328 cmd == SIOCBRDELIF ||
329 cmd == SIOCSHWTSTAMP ||
330 cmd == SIOCGHWTSTAMP ||
331 cmd == SIOCWANDEV) {
332 err = -EOPNOTSUPP;
333 if (ops->ndo_do_ioctl) {
334 if (netif_device_present(dev))
335 err = ops->ndo_do_ioctl(dev, ifr, cmd);
336 else
337 err = -ENODEV;
338 }
339 } else
340 err = -EINVAL;
341
342 }
343 return err;
344}
345
346/**
347 * dev_load - load a network module
348 * @net: the applicable net namespace
349 * @name: name of interface
350 *
351 * If a network interface is not present and the process has suitable
352 * privileges this function loads the module. If module loading is not
353 * available in this kernel then it becomes a nop.
354 */
355
356void dev_load(struct net *net, const char *name)
357{
358 struct net_device *dev;
359 int no_module;
360
361 rcu_read_lock();
362 dev = dev_get_by_name_rcu(net, name);
363 rcu_read_unlock();
364
365 no_module = !dev;
366 if (no_module && capable(CAP_NET_ADMIN))
367 no_module = request_module("netdev-%s", name);
368 if (no_module && capable(CAP_SYS_MODULE)) {
369 if (!request_module("%s", name))
370 pr_warn("Loading kernel module for a network device with CAP_SYS_MODULE (deprecated). Use CAP_NET_ADMIN and alias netdev-%s instead.\n",
371 name);
372 }
373}
374EXPORT_SYMBOL(dev_load);
375
376/*
377 * This function handles all "interface"-type I/O control requests. The actual
378 * 'doing' part of this is dev_ifsioc above.
379 */
380
381/**
382 * dev_ioctl - network device ioctl
383 * @net: the applicable net namespace
384 * @cmd: command to issue
385 * @arg: pointer to a struct ifreq in user space
386 *
387 * Issue ioctl functions to devices. This is normally called by the
388 * user space syscall interfaces but can sometimes be useful for
389 * other purposes. The return value is the return from the syscall if
390 * positive or a negative errno code on error.
391 */
392
393int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
394{
395 struct ifreq ifr;
396 int ret;
397 char *colon;
398
399 /* One special case: SIOCGIFCONF takes ifconf argument
400 and requires shared lock, because it sleeps writing
401 to user space.
402 */
403
404 if (cmd == SIOCGIFCONF) {
405 rtnl_lock();
406 ret = dev_ifconf(net, (char __user *) arg);
407 rtnl_unlock();
408 return ret;
409 }
410 if (cmd == SIOCGIFNAME)
411 return dev_ifname(net, (struct ifreq __user *)arg);
412
413 if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
414 return -EFAULT;
415
416 ifr.ifr_name[IFNAMSIZ-1] = 0;
417
418 colon = strchr(ifr.ifr_name, ':');
419 if (colon)
420 *colon = 0;
421
422 /*
423 * See which interface the caller is talking about.
424 */
425
426 switch (cmd) {
427 /*
428 * These ioctl calls:
429 * - can be done by all.
430 * - atomic and do not require locking.
431 * - return a value
432 */
433 case SIOCGIFFLAGS:
434 case SIOCGIFMETRIC:
435 case SIOCGIFMTU:
436 case SIOCGIFHWADDR:
437 case SIOCGIFSLAVE:
438 case SIOCGIFMAP:
439 case SIOCGIFINDEX:
440 case SIOCGIFTXQLEN:
441 dev_load(net, ifr.ifr_name);
442 rcu_read_lock();
443 ret = dev_ifsioc_locked(net, &ifr, cmd);
444 rcu_read_unlock();
445 if (!ret) {
446 if (colon)
447 *colon = ':';
448 if (copy_to_user(arg, &ifr,
449 sizeof(struct ifreq)))
450 ret = -EFAULT;
451 }
452 return ret;
453
454 case SIOCETHTOOL:
455 dev_load(net, ifr.ifr_name);
456 rtnl_lock();
457 ret = dev_ethtool(net, &ifr);
458 rtnl_unlock();
459 if (!ret) {
460 if (colon)
461 *colon = ':';
462 if (copy_to_user(arg, &ifr,
463 sizeof(struct ifreq)))
464 ret = -EFAULT;
465 }
466 return ret;
467
468 /*
469 * These ioctl calls:
470 * - require superuser power.
471 * - require strict serialization.
472 * - return a value
473 */
474 case SIOCGMIIPHY:
475 case SIOCGMIIREG:
476 case SIOCSIFNAME:
477 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
478 return -EPERM;
479 dev_load(net, ifr.ifr_name);
480 rtnl_lock();
481 ret = dev_ifsioc(net, &ifr, cmd);
482 rtnl_unlock();
483 if (!ret) {
484 if (colon)
485 *colon = ':';
486 if (copy_to_user(arg, &ifr,
487 sizeof(struct ifreq)))
488 ret = -EFAULT;
489 }
490 return ret;
491
492 /*
493 * These ioctl calls:
494 * - require superuser power.
495 * - require strict serialization.
496 * - do not return a value
497 */
498 case SIOCSIFMAP:
499 case SIOCSIFTXQLEN:
500 if (!capable(CAP_NET_ADMIN))
501 return -EPERM;
502 /* fall through */
503 /*
504 * These ioctl calls:
505 * - require local superuser power.
506 * - require strict serialization.
507 * - do not return a value
508 */
509 case SIOCSIFFLAGS:
510 case SIOCSIFMETRIC:
511 case SIOCSIFMTU:
512 case SIOCSIFHWADDR:
513 case SIOCSIFSLAVE:
514 case SIOCADDMULTI:
515 case SIOCDELMULTI:
516 case SIOCSIFHWBROADCAST:
517 case SIOCSMIIREG:
518 case SIOCBONDENSLAVE:
519 case SIOCBONDRELEASE:
520 case SIOCBONDSETHWADDR:
521 case SIOCBONDCHANGEACTIVE:
522 case SIOCBRADDIF:
523 case SIOCBRDELIF:
524 case SIOCSHWTSTAMP:
525 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
526 return -EPERM;
527 /* fall through */
528 case SIOCBONDSLAVEINFOQUERY:
529 case SIOCBONDINFOQUERY:
530 dev_load(net, ifr.ifr_name);
531 rtnl_lock();
532 ret = dev_ifsioc(net, &ifr, cmd);
533 rtnl_unlock();
534 return ret;
535
536 case SIOCGIFMEM:
537 /* Get the per device memory space. We can add this but
538 * currently do not support it */
539 case SIOCSIFMEM:
540 /* Set the per device memory buffer space.
541 * Not applicable in our case */
542 case SIOCSIFLINK:
543 return -ENOTTY;
544
545 /*
546 * Unknown or private ioctl.
547 */
548 default:
549 if (cmd == SIOCWANDEV ||
550 cmd == SIOCGHWTSTAMP ||
551 (cmd >= SIOCDEVPRIVATE &&
552 cmd <= SIOCDEVPRIVATE + 15)) {
553 dev_load(net, ifr.ifr_name);
554 rtnl_lock();
555 ret = dev_ifsioc(net, &ifr, cmd);
556 rtnl_unlock();
557 if (!ret && copy_to_user(arg, &ifr,
558 sizeof(struct ifreq)))
559 ret = -EFAULT;
560 return ret;
561 }
562 /* Take care of Wireless Extensions */
563 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
564 return wext_handle_ioctl(net, &ifr, cmd, arg);
565 return -ENOTTY;
566 }
567}
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/dsa.h>
9#include <net/wext.h>
10
11/*
12 * Map an interface index to its name (SIOCGIFNAME)
13 */
14
15/*
16 * We need this ioctl for efficient implementation of the
17 * if_indextoname() function required by the IPv6 API. Without
18 * it, we would have to search all the interfaces to find a
19 * match. --pb
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 * register_gifconf - register a SIOCGIF handler
32 * @family: Address family
33 * @gifconf: Function handler
34 *
35 * Register protocol dependent address dumping routines. The handler
36 * that is passed must not be freed or reused until it has been replaced
37 * by another handler.
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 * Perform a SIOCGIFCONF call. This structure will change
50 * size eventually, and there is nothing I can do about it.
51 * Thus we will need a 'compatibility mode'.
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 * Fetch the caller's info block.
64 */
65
66 pos = ifc->ifc_buf;
67 len = ifc->ifc_len;
68
69 /*
70 * Loop over the interfaces, and write an info block for each.
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 * All done. Write the updated control block back to the caller.
92 */
93 ifc->ifc_len = total;
94
95 /*
96 * Both BSD and Solaris return 0 here, so we do too.
97 */
98 return 0;
99}
100
101/*
102 * Perform the SIOCxIFxxx calls, inside rcu_read_lock()
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: /* Get interface flags */
114 ifr->ifr_flags = (short) dev_get_flags(dev);
115 return 0;
116
117 case SIOCGIFMETRIC: /* Get the metric on the interface
118 (currently unused) */
119 ifr->ifr_metric = 0;
120 return 0;
121
122 case SIOCGIFMTU: /* Get the MTU of a device */
123 ifr->ifr_mtu = dev->mtu;
124 return 0;
125
126 case SIOCGIFSLAVE:
127 err = -EINVAL;
128 break;
129
130 case SIOCGIFMAP:
131 ifr->ifr_map.mem_start = dev->mem_start;
132 ifr->ifr_map.mem_end = dev->mem_end;
133 ifr->ifr_map.base_addr = dev->base_addr;
134 ifr->ifr_map.irq = dev->irq;
135 ifr->ifr_map.dma = dev->dma;
136 ifr->ifr_map.port = dev->if_port;
137 return 0;
138
139 case SIOCGIFINDEX:
140 ifr->ifr_ifindex = dev->ifindex;
141 return 0;
142
143 case SIOCGIFTXQLEN:
144 ifr->ifr_qlen = dev->tx_queue_len;
145 return 0;
146
147 default:
148 /* dev_ioctl() should ensure this case
149 * is never reached
150 */
151 WARN_ON(1);
152 err = -ENOTTY;
153 break;
154
155 }
156 return err;
157}
158
159static int net_hwtstamp_validate(struct ifreq *ifr)
160{
161 struct hwtstamp_config cfg;
162 enum hwtstamp_tx_types tx_type;
163 enum hwtstamp_rx_filters rx_filter;
164 int tx_type_valid = 0;
165 int rx_filter_valid = 0;
166
167 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
168 return -EFAULT;
169
170 if (cfg.flags) /* reserved for future extensions */
171 return -EINVAL;
172
173 tx_type = cfg.tx_type;
174 rx_filter = cfg.rx_filter;
175
176 switch (tx_type) {
177 case HWTSTAMP_TX_OFF:
178 case HWTSTAMP_TX_ON:
179 case HWTSTAMP_TX_ONESTEP_SYNC:
180 case HWTSTAMP_TX_ONESTEP_P2P:
181 tx_type_valid = 1;
182 break;
183 case __HWTSTAMP_TX_CNT:
184 /* not a real value */
185 break;
186 }
187
188 switch (rx_filter) {
189 case HWTSTAMP_FILTER_NONE:
190 case HWTSTAMP_FILTER_ALL:
191 case HWTSTAMP_FILTER_SOME:
192 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
193 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
194 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
195 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
196 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
197 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
198 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
199 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
200 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
201 case HWTSTAMP_FILTER_PTP_V2_EVENT:
202 case HWTSTAMP_FILTER_PTP_V2_SYNC:
203 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
204 case HWTSTAMP_FILTER_NTP_ALL:
205 rx_filter_valid = 1;
206 break;
207 case __HWTSTAMP_FILTER_CNT:
208 /* not a real value */
209 break;
210 }
211
212 if (!tx_type_valid || !rx_filter_valid)
213 return -ERANGE;
214
215 return 0;
216}
217
218static int dev_do_ioctl(struct net_device *dev,
219 struct ifreq *ifr, unsigned int cmd)
220{
221 const struct net_device_ops *ops = dev->netdev_ops;
222 int err;
223
224 err = dsa_ndo_do_ioctl(dev, ifr, cmd);
225 if (err == 0 || err != -EOPNOTSUPP)
226 return err;
227
228 if (ops->ndo_do_ioctl) {
229 if (netif_device_present(dev))
230 err = ops->ndo_do_ioctl(dev, ifr, cmd);
231 else
232 err = -ENODEV;
233 }
234
235 return err;
236}
237
238/*
239 * Perform the SIOCxIFxxx calls, inside rtnl_lock()
240 */
241static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
242{
243 int err;
244 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
245 const struct net_device_ops *ops;
246
247 if (!dev)
248 return -ENODEV;
249
250 ops = dev->netdev_ops;
251
252 switch (cmd) {
253 case SIOCSIFFLAGS: /* Set interface flags */
254 return dev_change_flags(dev, ifr->ifr_flags, NULL);
255
256 case SIOCSIFMETRIC: /* Set the metric on the interface
257 (currently unused) */
258 return -EOPNOTSUPP;
259
260 case SIOCSIFMTU: /* Set the MTU of a device */
261 return dev_set_mtu(dev, ifr->ifr_mtu);
262
263 case SIOCSIFHWADDR:
264 if (dev->addr_len > sizeof(struct sockaddr))
265 return -EINVAL;
266 return dev_set_mac_address_user(dev, &ifr->ifr_hwaddr, NULL);
267
268 case SIOCSIFHWBROADCAST:
269 if (ifr->ifr_hwaddr.sa_family != dev->type)
270 return -EINVAL;
271 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
272 min(sizeof(ifr->ifr_hwaddr.sa_data),
273 (size_t)dev->addr_len));
274 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
275 return 0;
276
277 case SIOCSIFMAP:
278 if (ops->ndo_set_config) {
279 if (!netif_device_present(dev))
280 return -ENODEV;
281 return ops->ndo_set_config(dev, &ifr->ifr_map);
282 }
283 return -EOPNOTSUPP;
284
285 case SIOCADDMULTI:
286 if (!ops->ndo_set_rx_mode ||
287 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
288 return -EINVAL;
289 if (!netif_device_present(dev))
290 return -ENODEV;
291 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data);
292
293 case SIOCDELMULTI:
294 if (!ops->ndo_set_rx_mode ||
295 ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
296 return -EINVAL;
297 if (!netif_device_present(dev))
298 return -ENODEV;
299 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data);
300
301 case SIOCSIFTXQLEN:
302 if (ifr->ifr_qlen < 0)
303 return -EINVAL;
304 return dev_change_tx_queue_len(dev, ifr->ifr_qlen);
305
306 case SIOCSIFNAME:
307 ifr->ifr_newname[IFNAMSIZ-1] = '\0';
308 return dev_change_name(dev, ifr->ifr_newname);
309
310 case SIOCSHWTSTAMP:
311 err = net_hwtstamp_validate(ifr);
312 if (err)
313 return err;
314 fallthrough;
315
316 /*
317 * Unknown or private ioctl
318 */
319 default:
320 if ((cmd >= SIOCDEVPRIVATE &&
321 cmd <= SIOCDEVPRIVATE + 15) ||
322 cmd == SIOCBONDENSLAVE ||
323 cmd == SIOCBONDRELEASE ||
324 cmd == SIOCBONDSETHWADDR ||
325 cmd == SIOCBONDSLAVEINFOQUERY ||
326 cmd == SIOCBONDINFOQUERY ||
327 cmd == SIOCBONDCHANGEACTIVE ||
328 cmd == SIOCGMIIPHY ||
329 cmd == SIOCGMIIREG ||
330 cmd == SIOCSMIIREG ||
331 cmd == SIOCBRADDIF ||
332 cmd == SIOCBRDELIF ||
333 cmd == SIOCSHWTSTAMP ||
334 cmd == SIOCGHWTSTAMP ||
335 cmd == SIOCWANDEV) {
336 err = dev_do_ioctl(dev, ifr, cmd);
337 } else
338 err = -EINVAL;
339
340 }
341 return err;
342}
343
344/**
345 * dev_load - load a network module
346 * @net: the applicable net namespace
347 * @name: name of interface
348 *
349 * If a network interface is not present and the process has suitable
350 * privileges this function loads the module. If module loading is not
351 * available in this kernel then it becomes a nop.
352 */
353
354void dev_load(struct net *net, const char *name)
355{
356 struct net_device *dev;
357 int no_module;
358
359 rcu_read_lock();
360 dev = dev_get_by_name_rcu(net, name);
361 rcu_read_unlock();
362
363 no_module = !dev;
364 if (no_module && capable(CAP_NET_ADMIN))
365 no_module = request_module("netdev-%s", name);
366 if (no_module && capable(CAP_SYS_MODULE))
367 request_module("%s", name);
368}
369EXPORT_SYMBOL(dev_load);
370
371/*
372 * This function handles all "interface"-type I/O control requests. The actual
373 * 'doing' part of this is dev_ifsioc above.
374 */
375
376/**
377 * dev_ioctl - network device ioctl
378 * @net: the applicable net namespace
379 * @cmd: command to issue
380 * @ifr: pointer to a struct ifreq in user space
381 * @need_copyout: whether or not copy_to_user() should be called
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 case SIOCGIFHWADDR:
411 dev_load(net, ifr->ifr_name);
412 ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name);
413 if (colon)
414 *colon = ':';
415 return ret;
416 /*
417 * These ioctl calls:
418 * - can be done by all.
419 * - atomic and do not require locking.
420 * - return a value
421 */
422 case SIOCGIFFLAGS:
423 case SIOCGIFMETRIC:
424 case SIOCGIFMTU:
425 case SIOCGIFSLAVE:
426 case SIOCGIFMAP:
427 case SIOCGIFINDEX:
428 case SIOCGIFTXQLEN:
429 dev_load(net, ifr->ifr_name);
430 rcu_read_lock();
431 ret = dev_ifsioc_locked(net, ifr, cmd);
432 rcu_read_unlock();
433 if (colon)
434 *colon = ':';
435 return ret;
436
437 case SIOCETHTOOL:
438 dev_load(net, ifr->ifr_name);
439 rtnl_lock();
440 ret = dev_ethtool(net, ifr);
441 rtnl_unlock();
442 if (colon)
443 *colon = ':';
444 return ret;
445
446 /*
447 * These ioctl calls:
448 * - require superuser power.
449 * - require strict serialization.
450 * - return a value
451 */
452 case SIOCGMIIPHY:
453 case SIOCGMIIREG:
454 case SIOCSIFNAME:
455 dev_load(net, ifr->ifr_name);
456 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
457 return -EPERM;
458 rtnl_lock();
459 ret = dev_ifsioc(net, ifr, cmd);
460 rtnl_unlock();
461 if (colon)
462 *colon = ':';
463 return ret;
464
465 /*
466 * These ioctl calls:
467 * - require superuser power.
468 * - require strict serialization.
469 * - do not return a value
470 */
471 case SIOCSIFMAP:
472 case SIOCSIFTXQLEN:
473 if (!capable(CAP_NET_ADMIN))
474 return -EPERM;
475 fallthrough;
476 /*
477 * These ioctl calls:
478 * - require local superuser power.
479 * - require strict serialization.
480 * - do not return a value
481 */
482 case SIOCSIFFLAGS:
483 case SIOCSIFMETRIC:
484 case SIOCSIFMTU:
485 case SIOCSIFHWADDR:
486 case SIOCSIFSLAVE:
487 case SIOCADDMULTI:
488 case SIOCDELMULTI:
489 case SIOCSIFHWBROADCAST:
490 case SIOCSMIIREG:
491 case SIOCBONDENSLAVE:
492 case SIOCBONDRELEASE:
493 case SIOCBONDSETHWADDR:
494 case SIOCBONDCHANGEACTIVE:
495 case SIOCBRADDIF:
496 case SIOCBRDELIF:
497 case SIOCSHWTSTAMP:
498 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
499 return -EPERM;
500 fallthrough;
501 case SIOCBONDSLAVEINFOQUERY:
502 case SIOCBONDINFOQUERY:
503 dev_load(net, ifr->ifr_name);
504 rtnl_lock();
505 ret = dev_ifsioc(net, ifr, cmd);
506 rtnl_unlock();
507 if (need_copyout)
508 *need_copyout = false;
509 return ret;
510
511 case SIOCGIFMEM:
512 /* Get the per device memory space. We can add this but
513 * currently do not support it */
514 case SIOCSIFMEM:
515 /* Set the per device memory buffer space.
516 * Not applicable in our case */
517 case SIOCSIFLINK:
518 return -ENOTTY;
519
520 /*
521 * Unknown or private ioctl.
522 */
523 default:
524 if (cmd == SIOCWANDEV ||
525 cmd == SIOCGHWTSTAMP ||
526 (cmd >= SIOCDEVPRIVATE &&
527 cmd <= SIOCDEVPRIVATE + 15)) {
528 dev_load(net, ifr->ifr_name);
529 rtnl_lock();
530 ret = dev_ifsioc(net, ifr, cmd);
531 rtnl_unlock();
532 return ret;
533 }
534 return -ENOTTY;
535 }
536}