Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 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 | |
| 20 | static int dev_ifname(struct net *net, struct ifreq __user *arg) |
| 21 | { |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 22 | struct ifreq ifr; |
Nicolas Schichan | 5dbe7c1 | 2013-06-26 17:23:42 +0200 | [diff] [blame] | 23 | int error; |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 24 | |
| 25 | /* |
| 26 | * Fetch the caller's info block. |
| 27 | */ |
| 28 | |
| 29 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| 30 | return -EFAULT; |
David S. Miller | 6367911 | 2017-07-19 13:33:24 -0700 | [diff] [blame] | 31 | ifr.ifr_name[IFNAMSIZ-1] = 0; |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 32 | |
Nicolas Schichan | 5dbe7c1 | 2013-06-26 17:23:42 +0200 | [diff] [blame] | 33 | error = netdev_get_name(net, ifr.ifr_name, ifr.ifr_ifindex); |
| 34 | if (error) |
| 35 | return error; |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 36 | |
| 37 | if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) |
| 38 | return -EFAULT; |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static gifconf_func_t *gifconf_list[NPROTO]; |
| 43 | |
| 44 | /** |
| 45 | * register_gifconf - register a SIOCGIF handler |
| 46 | * @family: Address family |
| 47 | * @gifconf: Function handler |
| 48 | * |
| 49 | * Register protocol dependent address dumping routines. The handler |
| 50 | * that is passed must not be freed or reused until it has been replaced |
| 51 | * by another handler. |
| 52 | */ |
| 53 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf) |
| 54 | { |
| 55 | if (family >= NPROTO) |
| 56 | return -EINVAL; |
| 57 | gifconf_list[family] = gifconf; |
| 58 | return 0; |
| 59 | } |
| 60 | EXPORT_SYMBOL(register_gifconf); |
| 61 | |
| 62 | /* |
| 63 | * Perform a SIOCGIFCONF call. This structure will change |
| 64 | * size eventually, and there is nothing I can do about it. |
| 65 | * Thus we will need a 'compatibility mode'. |
| 66 | */ |
| 67 | |
| 68 | static int dev_ifconf(struct net *net, char __user *arg) |
| 69 | { |
| 70 | struct ifconf ifc; |
| 71 | struct net_device *dev; |
| 72 | char __user *pos; |
| 73 | int len; |
| 74 | int total; |
| 75 | int i; |
| 76 | |
| 77 | /* |
| 78 | * Fetch the caller's info block. |
| 79 | */ |
| 80 | |
| 81 | if (copy_from_user(&ifc, arg, sizeof(struct ifconf))) |
| 82 | return -EFAULT; |
| 83 | |
| 84 | pos = ifc.ifc_buf; |
| 85 | len = ifc.ifc_len; |
| 86 | |
| 87 | /* |
| 88 | * Loop over the interfaces, and write an info block for each. |
| 89 | */ |
| 90 | |
| 91 | total = 0; |
| 92 | for_each_netdev(net, dev) { |
| 93 | for (i = 0; i < NPROTO; i++) { |
| 94 | if (gifconf_list[i]) { |
| 95 | int done; |
| 96 | if (!pos) |
| 97 | done = gifconf_list[i](dev, NULL, 0); |
| 98 | else |
| 99 | done = gifconf_list[i](dev, pos + total, |
| 100 | len - total); |
| 101 | if (done < 0) |
| 102 | return -EFAULT; |
| 103 | total += done; |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * All done. Write the updated control block back to the caller. |
| 110 | */ |
| 111 | ifc.ifc_len = total; |
| 112 | |
| 113 | /* |
| 114 | * Both BSD and Solaris return 0 here, so we do too. |
| 115 | */ |
| 116 | return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0; |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | * Perform the SIOCxIFxxx calls, inside rcu_read_lock() |
| 121 | */ |
| 122 | static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd) |
| 123 | { |
| 124 | int err; |
| 125 | struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); |
| 126 | |
| 127 | if (!dev) |
| 128 | return -ENODEV; |
| 129 | |
| 130 | switch (cmd) { |
| 131 | case SIOCGIFFLAGS: /* Get interface flags */ |
| 132 | ifr->ifr_flags = (short) dev_get_flags(dev); |
| 133 | return 0; |
| 134 | |
| 135 | case SIOCGIFMETRIC: /* Get the metric on the interface |
| 136 | (currently unused) */ |
| 137 | ifr->ifr_metric = 0; |
| 138 | return 0; |
| 139 | |
| 140 | case SIOCGIFMTU: /* Get the MTU of a device */ |
| 141 | ifr->ifr_mtu = dev->mtu; |
| 142 | return 0; |
| 143 | |
| 144 | case SIOCGIFHWADDR: |
| 145 | if (!dev->addr_len) |
Fabian Frederick | 54aeba7 | 2014-11-17 22:23:17 +0100 | [diff] [blame] | 146 | memset(ifr->ifr_hwaddr.sa_data, 0, |
| 147 | sizeof(ifr->ifr_hwaddr.sa_data)); |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 148 | else |
| 149 | memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr, |
Fabian Frederick | 54aeba7 | 2014-11-17 22:23:17 +0100 | [diff] [blame] | 150 | min(sizeof(ifr->ifr_hwaddr.sa_data), |
| 151 | (size_t)dev->addr_len)); |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 152 | ifr->ifr_hwaddr.sa_family = dev->type; |
| 153 | return 0; |
| 154 | |
| 155 | case SIOCGIFSLAVE: |
| 156 | err = -EINVAL; |
| 157 | break; |
| 158 | |
| 159 | case SIOCGIFMAP: |
| 160 | ifr->ifr_map.mem_start = dev->mem_start; |
| 161 | ifr->ifr_map.mem_end = dev->mem_end; |
| 162 | ifr->ifr_map.base_addr = dev->base_addr; |
| 163 | ifr->ifr_map.irq = dev->irq; |
| 164 | ifr->ifr_map.dma = dev->dma; |
| 165 | ifr->ifr_map.port = dev->if_port; |
| 166 | return 0; |
| 167 | |
| 168 | case SIOCGIFINDEX: |
| 169 | ifr->ifr_ifindex = dev->ifindex; |
| 170 | return 0; |
| 171 | |
| 172 | case SIOCGIFTXQLEN: |
| 173 | ifr->ifr_qlen = dev->tx_queue_len; |
| 174 | return 0; |
| 175 | |
| 176 | default: |
| 177 | /* dev_ioctl() should ensure this case |
| 178 | * is never reached |
| 179 | */ |
| 180 | WARN_ON(1); |
| 181 | err = -ENOTTY; |
| 182 | break; |
| 183 | |
| 184 | } |
| 185 | return err; |
| 186 | } |
| 187 | |
| 188 | static int net_hwtstamp_validate(struct ifreq *ifr) |
| 189 | { |
| 190 | struct hwtstamp_config cfg; |
| 191 | enum hwtstamp_tx_types tx_type; |
| 192 | enum hwtstamp_rx_filters rx_filter; |
| 193 | int tx_type_valid = 0; |
| 194 | int rx_filter_valid = 0; |
| 195 | |
| 196 | if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) |
| 197 | return -EFAULT; |
| 198 | |
| 199 | if (cfg.flags) /* reserved for future extensions */ |
| 200 | return -EINVAL; |
| 201 | |
| 202 | tx_type = cfg.tx_type; |
| 203 | rx_filter = cfg.rx_filter; |
| 204 | |
| 205 | switch (tx_type) { |
| 206 | case HWTSTAMP_TX_OFF: |
| 207 | case HWTSTAMP_TX_ON: |
| 208 | case HWTSTAMP_TX_ONESTEP_SYNC: |
| 209 | tx_type_valid = 1; |
| 210 | break; |
| 211 | } |
| 212 | |
| 213 | switch (rx_filter) { |
| 214 | case HWTSTAMP_FILTER_NONE: |
| 215 | case HWTSTAMP_FILTER_ALL: |
| 216 | case HWTSTAMP_FILTER_SOME: |
| 217 | case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: |
| 218 | case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: |
| 219 | case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: |
| 220 | case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: |
| 221 | case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: |
| 222 | case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: |
| 223 | case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: |
| 224 | case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: |
| 225 | case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: |
| 226 | case HWTSTAMP_FILTER_PTP_V2_EVENT: |
| 227 | case HWTSTAMP_FILTER_PTP_V2_SYNC: |
| 228 | case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: |
Miroslav Lichvar | b8210a9 | 2017-05-19 17:52:35 +0200 | [diff] [blame] | 229 | case HWTSTAMP_FILTER_NTP_ALL: |
Miroslav Lichvar | e341257 | 2017-05-19 17:52:36 +0200 | [diff] [blame] | 230 | rx_filter_valid = 1; |
Miroslav Lichvar | b8210a9 | 2017-05-19 17:52:35 +0200 | [diff] [blame] | 231 | break; |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | if (!tx_type_valid || !rx_filter_valid) |
| 235 | return -ERANGE; |
| 236 | |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * Perform the SIOCxIFxxx calls, inside rtnl_lock() |
| 242 | */ |
| 243 | static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd) |
| 244 | { |
| 245 | int err; |
| 246 | struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); |
| 247 | const struct net_device_ops *ops; |
| 248 | |
| 249 | if (!dev) |
| 250 | return -ENODEV; |
| 251 | |
| 252 | ops = dev->netdev_ops; |
| 253 | |
| 254 | switch (cmd) { |
| 255 | case SIOCSIFFLAGS: /* Set interface flags */ |
| 256 | return dev_change_flags(dev, ifr->ifr_flags); |
| 257 | |
| 258 | case SIOCSIFMETRIC: /* Set the metric on the interface |
| 259 | (currently unused) */ |
| 260 | return -EOPNOTSUPP; |
| 261 | |
| 262 | case SIOCSIFMTU: /* Set the MTU of a device */ |
| 263 | return dev_set_mtu(dev, ifr->ifr_mtu); |
| 264 | |
| 265 | case SIOCSIFHWADDR: |
WANG Cong | 0254e0c | 2017-07-26 15:22:06 -0700 | [diff] [blame] | 266 | if (dev->addr_len > sizeof(struct sockaddr)) |
| 267 | return -EINVAL; |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 268 | return dev_set_mac_address(dev, &ifr->ifr_hwaddr); |
| 269 | |
| 270 | case SIOCSIFHWBROADCAST: |
| 271 | if (ifr->ifr_hwaddr.sa_family != dev->type) |
| 272 | return -EINVAL; |
| 273 | memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, |
Fabian Frederick | 54aeba7 | 2014-11-17 22:23:17 +0100 | [diff] [blame] | 274 | min(sizeof(ifr->ifr_hwaddr.sa_data), |
| 275 | (size_t)dev->addr_len)); |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 276 | call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| 277 | return 0; |
| 278 | |
| 279 | case SIOCSIFMAP: |
| 280 | if (ops->ndo_set_config) { |
| 281 | if (!netif_device_present(dev)) |
| 282 | return -ENODEV; |
| 283 | return ops->ndo_set_config(dev, &ifr->ifr_map); |
| 284 | } |
| 285 | return -EOPNOTSUPP; |
| 286 | |
| 287 | case SIOCADDMULTI: |
| 288 | if (!ops->ndo_set_rx_mode || |
| 289 | ifr->ifr_hwaddr.sa_family != AF_UNSPEC) |
| 290 | return -EINVAL; |
| 291 | if (!netif_device_present(dev)) |
| 292 | return -ENODEV; |
| 293 | return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); |
| 294 | |
| 295 | case SIOCDELMULTI: |
| 296 | if (!ops->ndo_set_rx_mode || |
| 297 | ifr->ifr_hwaddr.sa_family != AF_UNSPEC) |
| 298 | return -EINVAL; |
| 299 | if (!netif_device_present(dev)) |
| 300 | return -ENODEV; |
| 301 | return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); |
| 302 | |
| 303 | case SIOCSIFTXQLEN: |
| 304 | if (ifr->ifr_qlen < 0) |
| 305 | return -EINVAL; |
Xin Long | 823038c | 2017-10-16 19:43:15 +0800 | [diff] [blame] | 306 | if (dev->tx_queue_len ^ ifr->ifr_qlen) { |
| 307 | unsigned int orig_len = dev->tx_queue_len; |
| 308 | |
| 309 | dev->tx_queue_len = ifr->ifr_qlen; |
| 310 | err = call_netdevice_notifiers( |
| 311 | NETDEV_CHANGE_TX_QUEUE_LEN, dev); |
| 312 | err = notifier_to_errno(err); |
| 313 | if (err) { |
| 314 | dev->tx_queue_len = orig_len; |
| 315 | return err; |
| 316 | } |
| 317 | } |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 318 | return 0; |
| 319 | |
| 320 | case SIOCSIFNAME: |
| 321 | ifr->ifr_newname[IFNAMSIZ-1] = '\0'; |
| 322 | return dev_change_name(dev, ifr->ifr_newname); |
| 323 | |
| 324 | case SIOCSHWTSTAMP: |
| 325 | err = net_hwtstamp_validate(ifr); |
| 326 | if (err) |
| 327 | return err; |
| 328 | /* fall through */ |
| 329 | |
| 330 | /* |
| 331 | * Unknown or private ioctl |
| 332 | */ |
| 333 | default: |
| 334 | if ((cmd >= SIOCDEVPRIVATE && |
| 335 | cmd <= SIOCDEVPRIVATE + 15) || |
| 336 | cmd == SIOCBONDENSLAVE || |
| 337 | cmd == SIOCBONDRELEASE || |
| 338 | cmd == SIOCBONDSETHWADDR || |
| 339 | cmd == SIOCBONDSLAVEINFOQUERY || |
| 340 | cmd == SIOCBONDINFOQUERY || |
| 341 | cmd == SIOCBONDCHANGEACTIVE || |
| 342 | cmd == SIOCGMIIPHY || |
| 343 | cmd == SIOCGMIIREG || |
| 344 | cmd == SIOCSMIIREG || |
| 345 | cmd == SIOCBRADDIF || |
| 346 | cmd == SIOCBRDELIF || |
| 347 | cmd == SIOCSHWTSTAMP || |
Ben Hutchings | fd468c7 | 2013-11-14 01:19:29 +0000 | [diff] [blame] | 348 | cmd == SIOCGHWTSTAMP || |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 349 | cmd == SIOCWANDEV) { |
| 350 | err = -EOPNOTSUPP; |
| 351 | if (ops->ndo_do_ioctl) { |
| 352 | if (netif_device_present(dev)) |
| 353 | err = ops->ndo_do_ioctl(dev, ifr, cmd); |
| 354 | else |
| 355 | err = -ENODEV; |
| 356 | } |
| 357 | } else |
| 358 | err = -EINVAL; |
| 359 | |
| 360 | } |
| 361 | return err; |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * dev_load - load a network module |
| 366 | * @net: the applicable net namespace |
| 367 | * @name: name of interface |
| 368 | * |
| 369 | * If a network interface is not present and the process has suitable |
| 370 | * privileges this function loads the module. If module loading is not |
| 371 | * available in this kernel then it becomes a nop. |
| 372 | */ |
| 373 | |
| 374 | void dev_load(struct net *net, const char *name) |
| 375 | { |
| 376 | struct net_device *dev; |
| 377 | int no_module; |
| 378 | |
| 379 | rcu_read_lock(); |
| 380 | dev = dev_get_by_name_rcu(net, name); |
| 381 | rcu_read_unlock(); |
| 382 | |
| 383 | no_module = !dev; |
| 384 | if (no_module && capable(CAP_NET_ADMIN)) |
| 385 | no_module = request_module("netdev-%s", name); |
Daniel Borkmann | e020836 | 2014-09-02 23:30:05 +0200 | [diff] [blame] | 386 | if (no_module && capable(CAP_SYS_MODULE)) |
| 387 | request_module("%s", name); |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 388 | } |
| 389 | EXPORT_SYMBOL(dev_load); |
| 390 | |
| 391 | /* |
| 392 | * This function handles all "interface"-type I/O control requests. The actual |
| 393 | * 'doing' part of this is dev_ifsioc above. |
| 394 | */ |
| 395 | |
| 396 | /** |
| 397 | * dev_ioctl - network device ioctl |
| 398 | * @net: the applicable net namespace |
| 399 | * @cmd: command to issue |
| 400 | * @arg: pointer to a struct ifreq in user space |
| 401 | * |
| 402 | * Issue ioctl functions to devices. This is normally called by the |
| 403 | * user space syscall interfaces but can sometimes be useful for |
| 404 | * other purposes. The return value is the return from the syscall if |
| 405 | * positive or a negative errno code on error. |
| 406 | */ |
| 407 | |
| 408 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
| 409 | { |
| 410 | struct ifreq ifr; |
| 411 | int ret; |
| 412 | char *colon; |
| 413 | |
| 414 | /* One special case: SIOCGIFCONF takes ifconf argument |
| 415 | and requires shared lock, because it sleeps writing |
| 416 | to user space. |
| 417 | */ |
| 418 | |
| 419 | if (cmd == SIOCGIFCONF) { |
| 420 | rtnl_lock(); |
| 421 | ret = dev_ifconf(net, (char __user *) arg); |
| 422 | rtnl_unlock(); |
| 423 | return ret; |
| 424 | } |
| 425 | if (cmd == SIOCGIFNAME) |
| 426 | return dev_ifname(net, (struct ifreq __user *)arg); |
| 427 | |
Johannes Berg | 68dd02d | 2017-06-14 09:28:11 +0200 | [diff] [blame] | 428 | /* |
| 429 | * Take care of Wireless Extensions. Unfortunately struct iwreq |
| 430 | * isn't a proper subset of struct ifreq (it's 8 byte shorter) |
| 431 | * so we need to treat it specially, otherwise applications may |
| 432 | * fault if the struct they're passing happens to land at the |
| 433 | * end of a mapped page. |
| 434 | */ |
| 435 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
| 436 | struct iwreq iwr; |
| 437 | |
| 438 | if (copy_from_user(&iwr, arg, sizeof(iwr))) |
| 439 | return -EFAULT; |
| 440 | |
Levin, Alexander | 98de4e0 | 2017-07-18 04:23:16 +0000 | [diff] [blame] | 441 | iwr.ifr_name[sizeof(iwr.ifr_name) - 1] = 0; |
| 442 | |
Johannes Berg | 68dd02d | 2017-06-14 09:28:11 +0200 | [diff] [blame] | 443 | return wext_handle_ioctl(net, &iwr, cmd, arg); |
| 444 | } |
| 445 | |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 446 | if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) |
| 447 | return -EFAULT; |
| 448 | |
| 449 | ifr.ifr_name[IFNAMSIZ-1] = 0; |
| 450 | |
| 451 | colon = strchr(ifr.ifr_name, ':'); |
| 452 | if (colon) |
| 453 | *colon = 0; |
| 454 | |
| 455 | /* |
| 456 | * See which interface the caller is talking about. |
| 457 | */ |
| 458 | |
| 459 | switch (cmd) { |
| 460 | /* |
| 461 | * These ioctl calls: |
| 462 | * - can be done by all. |
| 463 | * - atomic and do not require locking. |
| 464 | * - return a value |
| 465 | */ |
| 466 | case SIOCGIFFLAGS: |
| 467 | case SIOCGIFMETRIC: |
| 468 | case SIOCGIFMTU: |
| 469 | case SIOCGIFHWADDR: |
| 470 | case SIOCGIFSLAVE: |
| 471 | case SIOCGIFMAP: |
| 472 | case SIOCGIFINDEX: |
| 473 | case SIOCGIFTXQLEN: |
| 474 | dev_load(net, ifr.ifr_name); |
| 475 | rcu_read_lock(); |
| 476 | ret = dev_ifsioc_locked(net, &ifr, cmd); |
| 477 | rcu_read_unlock(); |
| 478 | if (!ret) { |
| 479 | if (colon) |
| 480 | *colon = ':'; |
| 481 | if (copy_to_user(arg, &ifr, |
| 482 | sizeof(struct ifreq))) |
| 483 | ret = -EFAULT; |
| 484 | } |
| 485 | return ret; |
| 486 | |
| 487 | case SIOCETHTOOL: |
| 488 | dev_load(net, ifr.ifr_name); |
| 489 | rtnl_lock(); |
| 490 | ret = dev_ethtool(net, &ifr); |
| 491 | rtnl_unlock(); |
| 492 | if (!ret) { |
| 493 | if (colon) |
| 494 | *colon = ':'; |
| 495 | if (copy_to_user(arg, &ifr, |
| 496 | sizeof(struct ifreq))) |
| 497 | ret = -EFAULT; |
| 498 | } |
| 499 | return ret; |
| 500 | |
| 501 | /* |
| 502 | * These ioctl calls: |
| 503 | * - require superuser power. |
| 504 | * - require strict serialization. |
| 505 | * - return a value |
| 506 | */ |
| 507 | case SIOCGMIIPHY: |
| 508 | case SIOCGMIIREG: |
| 509 | case SIOCSIFNAME: |
| 510 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
| 511 | return -EPERM; |
| 512 | dev_load(net, ifr.ifr_name); |
| 513 | rtnl_lock(); |
| 514 | ret = dev_ifsioc(net, &ifr, cmd); |
| 515 | rtnl_unlock(); |
| 516 | if (!ret) { |
| 517 | if (colon) |
| 518 | *colon = ':'; |
| 519 | if (copy_to_user(arg, &ifr, |
| 520 | sizeof(struct ifreq))) |
| 521 | ret = -EFAULT; |
| 522 | } |
| 523 | return ret; |
| 524 | |
| 525 | /* |
| 526 | * These ioctl calls: |
| 527 | * - require superuser power. |
| 528 | * - require strict serialization. |
| 529 | * - do not return a value |
| 530 | */ |
| 531 | case SIOCSIFMAP: |
| 532 | case SIOCSIFTXQLEN: |
| 533 | if (!capable(CAP_NET_ADMIN)) |
| 534 | return -EPERM; |
| 535 | /* fall through */ |
| 536 | /* |
| 537 | * These ioctl calls: |
| 538 | * - require local superuser power. |
| 539 | * - require strict serialization. |
| 540 | * - do not return a value |
| 541 | */ |
| 542 | case SIOCSIFFLAGS: |
| 543 | case SIOCSIFMETRIC: |
| 544 | case SIOCSIFMTU: |
| 545 | case SIOCSIFHWADDR: |
| 546 | case SIOCSIFSLAVE: |
| 547 | case SIOCADDMULTI: |
| 548 | case SIOCDELMULTI: |
| 549 | case SIOCSIFHWBROADCAST: |
| 550 | case SIOCSMIIREG: |
| 551 | case SIOCBONDENSLAVE: |
| 552 | case SIOCBONDRELEASE: |
| 553 | case SIOCBONDSETHWADDR: |
| 554 | case SIOCBONDCHANGEACTIVE: |
| 555 | case SIOCBRADDIF: |
| 556 | case SIOCBRDELIF: |
| 557 | case SIOCSHWTSTAMP: |
| 558 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
| 559 | return -EPERM; |
| 560 | /* fall through */ |
| 561 | case SIOCBONDSLAVEINFOQUERY: |
| 562 | case SIOCBONDINFOQUERY: |
| 563 | dev_load(net, ifr.ifr_name); |
| 564 | rtnl_lock(); |
| 565 | ret = dev_ifsioc(net, &ifr, cmd); |
| 566 | rtnl_unlock(); |
| 567 | return ret; |
| 568 | |
| 569 | case SIOCGIFMEM: |
| 570 | /* Get the per device memory space. We can add this but |
| 571 | * currently do not support it */ |
| 572 | case SIOCSIFMEM: |
| 573 | /* Set the per device memory buffer space. |
| 574 | * Not applicable in our case */ |
| 575 | case SIOCSIFLINK: |
| 576 | return -ENOTTY; |
| 577 | |
| 578 | /* |
| 579 | * Unknown or private ioctl. |
| 580 | */ |
| 581 | default: |
| 582 | if (cmd == SIOCWANDEV || |
Ben Hutchings | fd468c7 | 2013-11-14 01:19:29 +0000 | [diff] [blame] | 583 | cmd == SIOCGHWTSTAMP || |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 584 | (cmd >= SIOCDEVPRIVATE && |
| 585 | cmd <= SIOCDEVPRIVATE + 15)) { |
| 586 | dev_load(net, ifr.ifr_name); |
| 587 | rtnl_lock(); |
| 588 | ret = dev_ifsioc(net, &ifr, cmd); |
| 589 | rtnl_unlock(); |
| 590 | if (!ret && copy_to_user(arg, &ifr, |
| 591 | sizeof(struct ifreq))) |
| 592 | ret = -EFAULT; |
| 593 | return ret; |
| 594 | } |
Cong Wang | 96b45cb | 2013-02-15 22:20:46 +0000 | [diff] [blame] | 595 | return -ENOTTY; |
| 596 | } |
| 597 | } |