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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
96b45cbd CW |
2 | #include <linux/kmod.h> |
3 | #include <linux/netdevice.h> | |
b0e99d03 | 4 | #include <linux/inetdevice.h> |
96b45cbd CW |
5 | #include <linux/etherdevice.h> |
6 | #include <linux/rtnetlink.h> | |
7 | #include <linux/net_tstamp.h> | |
8 | #include <linux/wireless.h> | |
ad2f99ae | 9 | #include <linux/if_bridge.h> |
5a178186 | 10 | #include <net/dsa_stubs.h> |
96b45cbd CW |
11 | #include <net/wext.h> |
12 | ||
6264f58c JK |
13 | #include "dev.h" |
14 | ||
96b45cbd CW |
15 | /* |
16 | * Map an interface index to its name (SIOCGIFNAME) | |
17 | */ | |
18 | ||
19 | /* | |
20 | * We need this ioctl for efficient implementation of the | |
21 | * if_indextoname() function required by the IPv6 API. Without | |
22 | * it, we would have to search all the interfaces to find a | |
23 | * match. --pb | |
24 | */ | |
25 | ||
44c02a2c | 26 | static int dev_ifname(struct net *net, struct ifreq *ifr) |
96b45cbd | 27 | { |
44c02a2c AV |
28 | ifr->ifr_name[IFNAMSIZ-1] = 0; |
29 | return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex); | |
96b45cbd CW |
30 | } |
31 | ||
96b45cbd CW |
32 | /* |
33 | * Perform a SIOCGIFCONF call. This structure will change | |
34 | * size eventually, and there is nothing I can do about it. | |
35 | * Thus we will need a 'compatibility mode'. | |
36 | */ | |
876f0bf9 | 37 | int dev_ifconf(struct net *net, struct ifconf __user *uifc) |
96b45cbd | 38 | { |
96b45cbd | 39 | struct net_device *dev; |
876f0bf9 AB |
40 | void __user *pos; |
41 | size_t size; | |
42 | int len, total = 0, done; | |
96b45cbd | 43 | |
876f0bf9 AB |
44 | /* both the ifconf and the ifreq structures are slightly different */ |
45 | if (in_compat_syscall()) { | |
46 | struct compat_ifconf ifc32; | |
96b45cbd | 47 | |
876f0bf9 AB |
48 | if (copy_from_user(&ifc32, uifc, sizeof(struct compat_ifconf))) |
49 | return -EFAULT; | |
96b45cbd | 50 | |
876f0bf9 AB |
51 | pos = compat_ptr(ifc32.ifcbuf); |
52 | len = ifc32.ifc_len; | |
53 | size = sizeof(struct compat_ifreq); | |
54 | } else { | |
55 | struct ifconf ifc; | |
56 | ||
57 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
58 | return -EFAULT; | |
96b45cbd | 59 | |
876f0bf9 AB |
60 | pos = ifc.ifc_buf; |
61 | len = ifc.ifc_len; | |
62 | size = sizeof(struct ifreq); | |
63 | } | |
64 | ||
65 | /* Loop over the interfaces, and write an info block for each. */ | |
66 | rtnl_lock(); | |
96b45cbd | 67 | for_each_netdev(net, dev) { |
b0e99d03 AB |
68 | if (!pos) |
69 | done = inet_gifconf(dev, NULL, 0, size); | |
70 | else | |
71 | done = inet_gifconf(dev, pos + total, | |
72 | len - total, size); | |
876f0bf9 AB |
73 | if (done < 0) { |
74 | rtnl_unlock(); | |
b0e99d03 | 75 | return -EFAULT; |
876f0bf9 | 76 | } |
b0e99d03 | 77 | total += done; |
96b45cbd | 78 | } |
876f0bf9 | 79 | rtnl_unlock(); |
96b45cbd | 80 | |
876f0bf9 | 81 | return put_user(total, &uifc->ifc_len); |
96b45cbd CW |
82 | } |
83 | ||
709566d7 AB |
84 | static int dev_getifmap(struct net_device *dev, struct ifreq *ifr) |
85 | { | |
86 | struct ifmap *ifmap = &ifr->ifr_map; | |
87 | ||
88 | if (in_compat_syscall()) { | |
89 | struct compat_ifmap *cifmap = (struct compat_ifmap *)ifmap; | |
90 | ||
91 | cifmap->mem_start = dev->mem_start; | |
92 | cifmap->mem_end = dev->mem_end; | |
93 | cifmap->base_addr = dev->base_addr; | |
94 | cifmap->irq = dev->irq; | |
95 | cifmap->dma = dev->dma; | |
96 | cifmap->port = dev->if_port; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | ifmap->mem_start = dev->mem_start; | |
102 | ifmap->mem_end = dev->mem_end; | |
103 | ifmap->base_addr = dev->base_addr; | |
104 | ifmap->irq = dev->irq; | |
105 | ifmap->dma = dev->dma; | |
106 | ifmap->port = dev->if_port; | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int dev_setifmap(struct net_device *dev, struct ifreq *ifr) | |
112 | { | |
113 | struct compat_ifmap *cifmap = (struct compat_ifmap *)&ifr->ifr_map; | |
114 | ||
115 | if (!dev->netdev_ops->ndo_set_config) | |
116 | return -EOPNOTSUPP; | |
117 | ||
118 | if (in_compat_syscall()) { | |
119 | struct ifmap ifmap = { | |
120 | .mem_start = cifmap->mem_start, | |
121 | .mem_end = cifmap->mem_end, | |
122 | .base_addr = cifmap->base_addr, | |
123 | .irq = cifmap->irq, | |
124 | .dma = cifmap->dma, | |
125 | .port = cifmap->port, | |
126 | }; | |
127 | ||
128 | return dev->netdev_ops->ndo_set_config(dev, &ifmap); | |
129 | } | |
130 | ||
131 | return dev->netdev_ops->ndo_set_config(dev, &ifr->ifr_map); | |
132 | } | |
133 | ||
96b45cbd CW |
134 | /* |
135 | * Perform the SIOCxIFxxx calls, inside rcu_read_lock() | |
136 | */ | |
137 | static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd) | |
138 | { | |
139 | int err; | |
140 | struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); | |
141 | ||
142 | if (!dev) | |
143 | return -ENODEV; | |
144 | ||
145 | switch (cmd) { | |
146 | case SIOCGIFFLAGS: /* Get interface flags */ | |
147 | ifr->ifr_flags = (short) dev_get_flags(dev); | |
148 | return 0; | |
149 | ||
150 | case SIOCGIFMETRIC: /* Get the metric on the interface | |
151 | (currently unused) */ | |
152 | ifr->ifr_metric = 0; | |
153 | return 0; | |
154 | ||
155 | case SIOCGIFMTU: /* Get the MTU of a device */ | |
156 | ifr->ifr_mtu = dev->mtu; | |
157 | return 0; | |
158 | ||
96b45cbd CW |
159 | case SIOCGIFSLAVE: |
160 | err = -EINVAL; | |
161 | break; | |
162 | ||
163 | case SIOCGIFMAP: | |
709566d7 | 164 | return dev_getifmap(dev, ifr); |
96b45cbd CW |
165 | |
166 | case SIOCGIFINDEX: | |
167 | ifr->ifr_ifindex = dev->ifindex; | |
168 | return 0; | |
169 | ||
170 | case SIOCGIFTXQLEN: | |
171 | ifr->ifr_qlen = dev->tx_queue_len; | |
172 | return 0; | |
173 | ||
174 | default: | |
175 | /* dev_ioctl() should ensure this case | |
176 | * is never reached | |
177 | */ | |
178 | WARN_ON(1); | |
179 | err = -ENOTTY; | |
180 | break; | |
181 | ||
182 | } | |
183 | return err; | |
184 | } | |
185 | ||
c4bffeaa | 186 | static int net_hwtstamp_validate(const struct kernel_hwtstamp_config *cfg) |
96b45cbd | 187 | { |
96b45cbd CW |
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 | ||
d5d5fd8f | 193 | if (cfg->flags & ~HWTSTAMP_FLAG_MASK) |
96b45cbd CW |
194 | return -EINVAL; |
195 | ||
d5d5fd8f VO |
196 | tx_type = cfg->tx_type; |
197 | rx_filter = cfg->rx_filter; | |
96b45cbd CW |
198 | |
199 | switch (tx_type) { | |
200 | case HWTSTAMP_TX_OFF: | |
201 | case HWTSTAMP_TX_ON: | |
202 | case HWTSTAMP_TX_ONESTEP_SYNC: | |
b6fd7b96 | 203 | case HWTSTAMP_TX_ONESTEP_P2P: |
96b45cbd CW |
204 | tx_type_valid = 1; |
205 | break; | |
f76510b4 MK |
206 | case __HWTSTAMP_TX_CNT: |
207 | /* not a real value */ | |
208 | break; | |
96b45cbd CW |
209 | } |
210 | ||
211 | switch (rx_filter) { | |
212 | case HWTSTAMP_FILTER_NONE: | |
213 | case HWTSTAMP_FILTER_ALL: | |
214 | case HWTSTAMP_FILTER_SOME: | |
215 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: | |
216 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: | |
217 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: | |
218 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: | |
219 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: | |
220 | case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: | |
221 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: | |
222 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: | |
223 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: | |
224 | case HWTSTAMP_FILTER_PTP_V2_EVENT: | |
225 | case HWTSTAMP_FILTER_PTP_V2_SYNC: | |
226 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: | |
b8210a9e | 227 | case HWTSTAMP_FILTER_NTP_ALL: |
e3412575 | 228 | rx_filter_valid = 1; |
b8210a9e | 229 | break; |
f76510b4 MK |
230 | case __HWTSTAMP_FILTER_CNT: |
231 | /* not a real value */ | |
232 | break; | |
96b45cbd CW |
233 | } |
234 | ||
235 | if (!tx_type_valid || !rx_filter_valid) | |
236 | return -ERANGE; | |
237 | ||
238 | return 0; | |
239 | } | |
240 | ||
a7605370 AB |
241 | static int dev_eth_ioctl(struct net_device *dev, |
242 | struct ifreq *ifr, unsigned int cmd) | |
aad74d84 FF |
243 | { |
244 | const struct net_device_ops *ops = dev->netdev_ops; | |
4ee58e1e VO |
245 | |
246 | if (!ops->ndo_eth_ioctl) | |
247 | return -EOPNOTSUPP; | |
248 | ||
249 | if (!netif_device_present(dev)) | |
250 | return -ENODEV; | |
251 | ||
252 | return ops->ndo_eth_ioctl(dev, ifr, cmd); | |
253 | } | |
254 | ||
255 | static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr) | |
256 | { | |
257 | return dev_eth_ioctl(dev, ifr, SIOCGHWTSTAMP); | |
258 | } | |
259 | ||
260 | static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) | |
261 | { | |
c4bffeaa | 262 | struct kernel_hwtstamp_config kernel_cfg; |
88c0a6b5 | 263 | struct netlink_ext_ack extack = {}; |
d5d5fd8f | 264 | struct hwtstamp_config cfg; |
1ca47431 | 265 | int err; |
aad74d84 | 266 | |
d5d5fd8f VO |
267 | if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) |
268 | return -EFAULT; | |
269 | ||
c4bffeaa VO |
270 | hwtstamp_config_to_kernel(&kernel_cfg, &cfg); |
271 | ||
272 | err = net_hwtstamp_validate(&kernel_cfg); | |
4ee58e1e | 273 | if (err) |
3369afba FF |
274 | return err; |
275 | ||
5a178186 | 276 | err = dsa_master_hwtstamp_validate(dev, &kernel_cfg, &extack); |
88c0a6b5 VO |
277 | if (err) { |
278 | if (extack._msg) | |
279 | netdev_err(dev, "%s\n", extack._msg); | |
4ee58e1e | 280 | return err; |
88c0a6b5 | 281 | } |
aad74d84 | 282 | |
4ee58e1e | 283 | return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP); |
aad74d84 FF |
284 | } |
285 | ||
3d9d00bd | 286 | static int dev_siocbond(struct net_device *dev, |
a7605370 AB |
287 | struct ifreq *ifr, unsigned int cmd) |
288 | { | |
289 | const struct net_device_ops *ops = dev->netdev_ops; | |
290 | ||
3d9d00bd | 291 | if (ops->ndo_siocbond) { |
a7605370 | 292 | if (netif_device_present(dev)) |
3d9d00bd | 293 | return ops->ndo_siocbond(dev, ifr, cmd); |
a7605370 AB |
294 | else |
295 | return -ENODEV; | |
296 | } | |
297 | ||
298 | return -EOPNOTSUPP; | |
299 | } | |
300 | ||
a554bf96 AB |
301 | static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, |
302 | void __user *data, unsigned int cmd) | |
b9067f5d AB |
303 | { |
304 | const struct net_device_ops *ops = dev->netdev_ops; | |
b9067f5d AB |
305 | |
306 | if (ops->ndo_siocdevprivate) { | |
307 | if (netif_device_present(dev)) | |
308 | return ops->ndo_siocdevprivate(dev, ifr, data, cmd); | |
309 | else | |
310 | return -ENODEV; | |
311 | } | |
312 | ||
88fc023f | 313 | return -EOPNOTSUPP; |
b9067f5d AB |
314 | } |
315 | ||
ad7eab2a AB |
316 | static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) |
317 | { | |
318 | const struct net_device_ops *ops = dev->netdev_ops; | |
319 | ||
320 | if (ops->ndo_siocwandev) { | |
321 | if (netif_device_present(dev)) | |
322 | return ops->ndo_siocwandev(dev, ifs); | |
323 | else | |
324 | return -ENODEV; | |
325 | } | |
326 | ||
327 | return -EOPNOTSUPP; | |
328 | } | |
329 | ||
96b45cbd CW |
330 | /* |
331 | * Perform the SIOCxIFxxx calls, inside rtnl_lock() | |
332 | */ | |
a554bf96 AB |
333 | static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, |
334 | unsigned int cmd) | |
96b45cbd CW |
335 | { |
336 | int err; | |
337 | struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); | |
338 | const struct net_device_ops *ops; | |
14ed029b | 339 | netdevice_tracker dev_tracker; |
96b45cbd CW |
340 | |
341 | if (!dev) | |
342 | return -ENODEV; | |
343 | ||
344 | ops = dev->netdev_ops; | |
345 | ||
346 | switch (cmd) { | |
347 | case SIOCSIFFLAGS: /* Set interface flags */ | |
567c5e13 | 348 | return dev_change_flags(dev, ifr->ifr_flags, NULL); |
96b45cbd CW |
349 | |
350 | case SIOCSIFMETRIC: /* Set the metric on the interface | |
351 | (currently unused) */ | |
352 | return -EOPNOTSUPP; | |
353 | ||
354 | case SIOCSIFMTU: /* Set the MTU of a device */ | |
355 | return dev_set_mtu(dev, ifr->ifr_mtu); | |
356 | ||
357 | case SIOCSIFHWADDR: | |
0254e0c6 WC |
358 | if (dev->addr_len > sizeof(struct sockaddr)) |
359 | return -EINVAL; | |
3b23a32a | 360 | return dev_set_mac_address_user(dev, &ifr->ifr_hwaddr, NULL); |
96b45cbd CW |
361 | |
362 | case SIOCSIFHWBROADCAST: | |
363 | if (ifr->ifr_hwaddr.sa_family != dev->type) | |
364 | return -EINVAL; | |
365 | memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, | |
b5f0de6d | 366 | min(sizeof(ifr->ifr_hwaddr.sa_data_min), |
54aeba7f | 367 | (size_t)dev->addr_len)); |
96b45cbd CW |
368 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
369 | return 0; | |
370 | ||
371 | case SIOCSIFMAP: | |
709566d7 | 372 | return dev_setifmap(dev, ifr); |
96b45cbd CW |
373 | |
374 | case SIOCADDMULTI: | |
375 | if (!ops->ndo_set_rx_mode || | |
376 | ifr->ifr_hwaddr.sa_family != AF_UNSPEC) | |
377 | return -EINVAL; | |
378 | if (!netif_device_present(dev)) | |
379 | return -ENODEV; | |
380 | return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); | |
381 | ||
382 | case SIOCDELMULTI: | |
383 | if (!ops->ndo_set_rx_mode || | |
384 | ifr->ifr_hwaddr.sa_family != AF_UNSPEC) | |
385 | return -EINVAL; | |
386 | if (!netif_device_present(dev)) | |
387 | return -ENODEV; | |
388 | return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); | |
389 | ||
390 | case SIOCSIFTXQLEN: | |
391 | if (ifr->ifr_qlen < 0) | |
392 | return -EINVAL; | |
8dd30201 | 393 | return dev_change_tx_queue_len(dev, ifr->ifr_qlen); |
96b45cbd CW |
394 | |
395 | case SIOCSIFNAME: | |
396 | ifr->ifr_newname[IFNAMSIZ-1] = '\0'; | |
397 | return dev_change_name(dev, ifr->ifr_newname); | |
398 | ||
ad7eab2a AB |
399 | case SIOCWANDEV: |
400 | return dev_siocwandev(dev, &ifr->ifr_settings); | |
401 | ||
ad2f99ae AB |
402 | case SIOCBRADDIF: |
403 | case SIOCBRDELIF: | |
404 | if (!netif_device_present(dev)) | |
405 | return -ENODEV; | |
9384eacd NA |
406 | if (!netif_is_bridge_master(dev)) |
407 | return -EOPNOTSUPP; | |
d62607c3 | 408 | netdev_hold(dev, &dev_tracker, GFP_KERNEL); |
893b1958 NA |
409 | rtnl_unlock(); |
410 | err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL); | |
d62607c3 | 411 | netdev_put(dev, &dev_tracker); |
893b1958 NA |
412 | rtnl_lock(); |
413 | return err; | |
ad2f99ae | 414 | |
00d521b3 VO |
415 | case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: |
416 | return dev_siocdevprivate(dev, ifr, data, cmd); | |
417 | ||
96b45cbd | 418 | case SIOCSHWTSTAMP: |
4ee58e1e | 419 | return dev_set_hwtstamp(dev, ifr); |
96b45cbd | 420 | |
00d521b3 | 421 | case SIOCGHWTSTAMP: |
4ee58e1e VO |
422 | return dev_get_hwtstamp(dev, ifr); |
423 | ||
00d521b3 VO |
424 | case SIOCGMIIPHY: |
425 | case SIOCGMIIREG: | |
426 | case SIOCSMIIREG: | |
427 | return dev_eth_ioctl(dev, ifr, cmd); | |
428 | ||
429 | case SIOCBONDENSLAVE: | |
430 | case SIOCBONDRELEASE: | |
431 | case SIOCBONDSETHWADDR: | |
432 | case SIOCBONDSLAVEINFOQUERY: | |
433 | case SIOCBONDINFOQUERY: | |
434 | case SIOCBONDCHANGEACTIVE: | |
435 | return dev_siocbond(dev, ifr, cmd); | |
436 | ||
437 | /* Unknown ioctl */ | |
96b45cbd | 438 | default: |
00d521b3 | 439 | err = -EINVAL; |
96b45cbd CW |
440 | } |
441 | return err; | |
442 | } | |
443 | ||
444 | /** | |
445 | * dev_load - load a network module | |
446 | * @net: the applicable net namespace | |
447 | * @name: name of interface | |
448 | * | |
449 | * If a network interface is not present and the process has suitable | |
450 | * privileges this function loads the module. If module loading is not | |
451 | * available in this kernel then it becomes a nop. | |
452 | */ | |
453 | ||
454 | void dev_load(struct net *net, const char *name) | |
455 | { | |
456 | struct net_device *dev; | |
457 | int no_module; | |
458 | ||
459 | rcu_read_lock(); | |
460 | dev = dev_get_by_name_rcu(net, name); | |
461 | rcu_read_unlock(); | |
462 | ||
463 | no_module = !dev; | |
464 | if (no_module && capable(CAP_NET_ADMIN)) | |
465 | no_module = request_module("netdev-%s", name); | |
e020836d DB |
466 | if (no_module && capable(CAP_SYS_MODULE)) |
467 | request_module("%s", name); | |
96b45cbd CW |
468 | } |
469 | EXPORT_SYMBOL(dev_load); | |
470 | ||
471 | /* | |
472 | * This function handles all "interface"-type I/O control requests. The actual | |
473 | * 'doing' part of this is dev_ifsioc above. | |
474 | */ | |
475 | ||
476 | /** | |
477 | * dev_ioctl - network device ioctl | |
478 | * @net: the applicable net namespace | |
479 | * @cmd: command to issue | |
b3c0fd61 | 480 | * @ifr: pointer to a struct ifreq in user space |
e5b42483 | 481 | * @data: data exchanged with userspace |
b3c0fd61 | 482 | * @need_copyout: whether or not copy_to_user() should be called |
96b45cbd CW |
483 | * |
484 | * Issue ioctl functions to devices. This is normally called by the | |
485 | * user space syscall interfaces but can sometimes be useful for | |
486 | * other purposes. The return value is the return from the syscall if | |
487 | * positive or a negative errno code on error. | |
488 | */ | |
489 | ||
a554bf96 AB |
490 | int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, |
491 | void __user *data, bool *need_copyout) | |
96b45cbd | 492 | { |
96b45cbd CW |
493 | int ret; |
494 | char *colon; | |
495 | ||
44c02a2c AV |
496 | if (need_copyout) |
497 | *need_copyout = true; | |
96b45cbd | 498 | if (cmd == SIOCGIFNAME) |
44c02a2c | 499 | return dev_ifname(net, ifr); |
96b45cbd | 500 | |
44c02a2c | 501 | ifr->ifr_name[IFNAMSIZ-1] = 0; |
96b45cbd | 502 | |
44c02a2c | 503 | colon = strchr(ifr->ifr_name, ':'); |
96b45cbd CW |
504 | if (colon) |
505 | *colon = 0; | |
506 | ||
507 | /* | |
508 | * See which interface the caller is talking about. | |
509 | */ | |
510 | ||
511 | switch (cmd) { | |
3b23a32a CW |
512 | case SIOCGIFHWADDR: |
513 | dev_load(net, ifr->ifr_name); | |
514 | ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name); | |
515 | if (colon) | |
516 | *colon = ':'; | |
517 | return ret; | |
96b45cbd CW |
518 | /* |
519 | * These ioctl calls: | |
520 | * - can be done by all. | |
521 | * - atomic and do not require locking. | |
522 | * - return a value | |
523 | */ | |
524 | case SIOCGIFFLAGS: | |
525 | case SIOCGIFMETRIC: | |
526 | case SIOCGIFMTU: | |
96b45cbd CW |
527 | case SIOCGIFSLAVE: |
528 | case SIOCGIFMAP: | |
529 | case SIOCGIFINDEX: | |
530 | case SIOCGIFTXQLEN: | |
b51f26b1 | 531 | dev_load(net, ifr->ifr_name); |
96b45cbd | 532 | rcu_read_lock(); |
44c02a2c | 533 | ret = dev_ifsioc_locked(net, ifr, cmd); |
96b45cbd | 534 | rcu_read_unlock(); |
44c02a2c AV |
535 | if (colon) |
536 | *colon = ':'; | |
96b45cbd CW |
537 | return ret; |
538 | ||
539 | case SIOCETHTOOL: | |
b51f26b1 | 540 | dev_load(net, ifr->ifr_name); |
a554bf96 | 541 | ret = dev_ethtool(net, ifr, data); |
44c02a2c AV |
542 | if (colon) |
543 | *colon = ':'; | |
96b45cbd CW |
544 | return ret; |
545 | ||
546 | /* | |
547 | * These ioctl calls: | |
548 | * - require superuser power. | |
549 | * - require strict serialization. | |
550 | * - return a value | |
551 | */ | |
552 | case SIOCGMIIPHY: | |
553 | case SIOCGMIIREG: | |
554 | case SIOCSIFNAME: | |
b51f26b1 | 555 | dev_load(net, ifr->ifr_name); |
96b45cbd CW |
556 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
557 | return -EPERM; | |
96b45cbd | 558 | rtnl_lock(); |
a554bf96 | 559 | ret = dev_ifsioc(net, ifr, data, cmd); |
96b45cbd | 560 | rtnl_unlock(); |
44c02a2c AV |
561 | if (colon) |
562 | *colon = ':'; | |
96b45cbd CW |
563 | return ret; |
564 | ||
565 | /* | |
566 | * These ioctl calls: | |
567 | * - require superuser power. | |
568 | * - require strict serialization. | |
569 | * - do not return a value | |
570 | */ | |
571 | case SIOCSIFMAP: | |
572 | case SIOCSIFTXQLEN: | |
573 | if (!capable(CAP_NET_ADMIN)) | |
574 | return -EPERM; | |
df561f66 | 575 | fallthrough; |
96b45cbd CW |
576 | /* |
577 | * These ioctl calls: | |
578 | * - require local superuser power. | |
579 | * - require strict serialization. | |
580 | * - do not return a value | |
581 | */ | |
582 | case SIOCSIFFLAGS: | |
583 | case SIOCSIFMETRIC: | |
584 | case SIOCSIFMTU: | |
585 | case SIOCSIFHWADDR: | |
586 | case SIOCSIFSLAVE: | |
587 | case SIOCADDMULTI: | |
588 | case SIOCDELMULTI: | |
589 | case SIOCSIFHWBROADCAST: | |
590 | case SIOCSMIIREG: | |
591 | case SIOCBONDENSLAVE: | |
592 | case SIOCBONDRELEASE: | |
593 | case SIOCBONDSETHWADDR: | |
594 | case SIOCBONDCHANGEACTIVE: | |
595 | case SIOCBRADDIF: | |
596 | case SIOCBRDELIF: | |
597 | case SIOCSHWTSTAMP: | |
598 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
599 | return -EPERM; | |
df561f66 | 600 | fallthrough; |
96b45cbd CW |
601 | case SIOCBONDSLAVEINFOQUERY: |
602 | case SIOCBONDINFOQUERY: | |
b51f26b1 | 603 | dev_load(net, ifr->ifr_name); |
96b45cbd | 604 | rtnl_lock(); |
a554bf96 | 605 | ret = dev_ifsioc(net, ifr, data, cmd); |
96b45cbd | 606 | rtnl_unlock(); |
44c02a2c AV |
607 | if (need_copyout) |
608 | *need_copyout = false; | |
96b45cbd CW |
609 | return ret; |
610 | ||
611 | case SIOCGIFMEM: | |
612 | /* Get the per device memory space. We can add this but | |
613 | * currently do not support it */ | |
614 | case SIOCSIFMEM: | |
615 | /* Set the per device memory buffer space. | |
616 | * Not applicable in our case */ | |
617 | case SIOCSIFLINK: | |
618 | return -ENOTTY; | |
619 | ||
620 | /* | |
621 | * Unknown or private ioctl. | |
622 | */ | |
623 | default: | |
624 | if (cmd == SIOCWANDEV || | |
fd468c74 | 625 | cmd == SIOCGHWTSTAMP || |
96b45cbd CW |
626 | (cmd >= SIOCDEVPRIVATE && |
627 | cmd <= SIOCDEVPRIVATE + 15)) { | |
b51f26b1 | 628 | dev_load(net, ifr->ifr_name); |
96b45cbd | 629 | rtnl_lock(); |
a554bf96 | 630 | ret = dev_ifsioc(net, ifr, data, cmd); |
96b45cbd | 631 | rtnl_unlock(); |
96b45cbd CW |
632 | return ret; |
633 | } | |
96b45cbd CW |
634 | return -ENOTTY; |
635 | } | |
636 | } |