1/* 2 * net/core/ethtool.c - Ethtool ioctl handler 3 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx> 4 * 5 * This file is where we call all the ethtool_ops commands to get 6 * the information ethtool needs. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 */ 13 14#include <linux/module.h> 15#include <linux/types.h> 16#include <linux/capability.h> 17#include <linux/errno.h> 18#include <linux/ethtool.h> 19#include <linux/netdevice.h> 20#include <linux/net_tstamp.h> 21#include <linux/phy.h> 22#include <linux/bitops.h> 23#include <linux/uaccess.h> 24#include <linux/vmalloc.h> 25#include <linux/slab.h> 26#include <linux/rtnetlink.h> 27#include <linux/sched.h> 28#include <linux/net.h> 29 30/* 31 * Some useful ethtool_ops methods that're device independent. 32 * If we find that all drivers want to do the same thing here, 33 * we can turn these into dev_() function calls. 34 */ 35 36u32 ethtool_op_get_link(struct net_device *dev) 37{ 38 return netif_carrier_ok(dev) ? 1 : 0; 39} 40EXPORT_SYMBOL(ethtool_op_get_link); 41 42int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) 43{ 44 info->so_timestamping = 45 SOF_TIMESTAMPING_TX_SOFTWARE | 46 SOF_TIMESTAMPING_RX_SOFTWARE | 47 SOF_TIMESTAMPING_SOFTWARE; 48 info->phc_index = -1; 49 return 0; 50} 51EXPORT_SYMBOL(ethtool_op_get_ts_info); 52 53/* Handlers for each ethtool command */ 54 55#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32) 56 57static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = { 58 [NETIF_F_SG_BIT] = "tx-scatter-gather", 59 [NETIF_F_IP_CSUM_BIT] = "tx-checksum-ipv4", 60 [NETIF_F_HW_CSUM_BIT] = "tx-checksum-ip-generic", 61 [NETIF_F_IPV6_CSUM_BIT] = "tx-checksum-ipv6", 62 [NETIF_F_HIGHDMA_BIT] = "highdma", 63 [NETIF_F_FRAGLIST_BIT] = "tx-scatter-gather-fraglist", 64 [NETIF_F_HW_VLAN_CTAG_TX_BIT] = "tx-vlan-hw-insert", 65 66 [NETIF_F_HW_VLAN_CTAG_RX_BIT] = "rx-vlan-hw-parse", 67 [NETIF_F_HW_VLAN_CTAG_FILTER_BIT] = "rx-vlan-filter", 68 [NETIF_F_HW_VLAN_STAG_TX_BIT] = "tx-vlan-stag-hw-insert", 69 [NETIF_F_HW_VLAN_STAG_RX_BIT] = "rx-vlan-stag-hw-parse", 70 [NETIF_F_HW_VLAN_STAG_FILTER_BIT] = "rx-vlan-stag-filter", 71 [NETIF_F_VLAN_CHALLENGED_BIT] = "vlan-challenged", 72 [NETIF_F_GSO_BIT] = "tx-generic-segmentation", 73 [NETIF_F_LLTX_BIT] = "tx-lockless", 74 [NETIF_F_NETNS_LOCAL_BIT] = "netns-local", 75 [NETIF_F_GRO_BIT] = "rx-gro", 76 [NETIF_F_LRO_BIT] = "rx-lro", 77 78 [NETIF_F_TSO_BIT] = "tx-tcp-segmentation", 79 [NETIF_F_UFO_BIT] = "tx-udp-fragmentation", 80 [NETIF_F_GSO_ROBUST_BIT] = "tx-gso-robust", 81 [NETIF_F_TSO_ECN_BIT] = "tx-tcp-ecn-segmentation", 82 [NETIF_F_TSO6_BIT] = "tx-tcp6-segmentation", 83 [NETIF_F_FSO_BIT] = "tx-fcoe-segmentation", 84 [NETIF_F_GSO_GRE_BIT] = "tx-gre-segmentation", 85 [NETIF_F_GSO_IPIP_BIT] = "tx-ipip-segmentation", 86 [NETIF_F_GSO_SIT_BIT] = "tx-sit-segmentation", 87 [NETIF_F_GSO_UDP_TUNNEL_BIT] = "tx-udp_tnl-segmentation", 88 89 [NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc", 90 [NETIF_F_SCTP_CSUM_BIT] = "tx-checksum-sctp", 91 [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu", 92 [NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter", 93 [NETIF_F_RXHASH_BIT] = "rx-hashing", 94 [NETIF_F_RXCSUM_BIT] = "rx-checksum", 95 [NETIF_F_NOCACHE_COPY_BIT] = "tx-nocache-copy", 96 [NETIF_F_LOOPBACK_BIT] = "loopback", 97 [NETIF_F_RXFCS_BIT] = "rx-fcs", 98 [NETIF_F_RXALL_BIT] = "rx-all", 99 [NETIF_F_HW_L2FW_DOFFLOAD_BIT] = "l2-fwd-offload", 100 [NETIF_F_BUSY_POLL_BIT] = "busy-poll", 101 [NETIF_F_HW_SWITCH_OFFLOAD_BIT] = "hw-switch-offload", 102}; 103 104static const char 105rss_hash_func_strings[ETH_RSS_HASH_FUNCS_COUNT][ETH_GSTRING_LEN] = { 106 [ETH_RSS_HASH_TOP_BIT] = "toeplitz", 107 [ETH_RSS_HASH_XOR_BIT] = "xor", 108}; 109 110static int ethtool_get_features(struct net_device *dev, void __user *useraddr) 111{ 112 struct ethtool_gfeatures cmd = { 113 .cmd = ETHTOOL_GFEATURES, 114 .size = ETHTOOL_DEV_FEATURE_WORDS, 115 }; 116 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 117 u32 __user *sizeaddr; 118 u32 copy_size; 119 int i; 120 121 /* in case feature bits run out again */ 122 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t)); 123 124 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 125 features[i].available = (u32)(dev->hw_features >> (32 * i)); 126 features[i].requested = (u32)(dev->wanted_features >> (32 * i)); 127 features[i].active = (u32)(dev->features >> (32 * i)); 128 features[i].never_changed = 129 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i)); 130 } 131 132 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size); 133 if (get_user(copy_size, sizeaddr)) 134 return -EFAULT; 135 136 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS) 137 copy_size = ETHTOOL_DEV_FEATURE_WORDS; 138 139 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 140 return -EFAULT; 141 useraddr += sizeof(cmd); 142 if (copy_to_user(useraddr, features, copy_size * sizeof(*features))) 143 return -EFAULT; 144 145 return 0; 146} 147 148static int ethtool_set_features(struct net_device *dev, void __user *useraddr) 149{ 150 struct ethtool_sfeatures cmd; 151 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 152 netdev_features_t wanted = 0, valid = 0; 153 int i, ret = 0; 154 155 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 156 return -EFAULT; 157 useraddr += sizeof(cmd); 158 159 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS) 160 return -EINVAL; 161 162 if (copy_from_user(features, useraddr, sizeof(features))) 163 return -EFAULT; 164 165 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 166 valid |= (netdev_features_t)features[i].valid << (32 * i); 167 wanted |= (netdev_features_t)features[i].requested << (32 * i); 168 } 169 170 if (valid & ~NETIF_F_ETHTOOL_BITS) 171 return -EINVAL; 172 173 if (valid & ~dev->hw_features) { 174 valid &= dev->hw_features; 175 ret |= ETHTOOL_F_UNSUPPORTED; 176 } 177 178 dev->wanted_features &= ~valid; 179 dev->wanted_features |= wanted & valid; 180 __netdev_update_features(dev); 181 182 if ((dev->wanted_features ^ dev->features) & valid) 183 ret |= ETHTOOL_F_WISH; 184 185 return ret; 186} 187 188static int __ethtool_get_sset_count(struct net_device *dev, int sset) 189{ 190 const struct ethtool_ops *ops = dev->ethtool_ops; 191 192 if (sset == ETH_SS_FEATURES) 193 return ARRAY_SIZE(netdev_features_strings); 194 195 if (sset == ETH_SS_RSS_HASH_FUNCS) 196 return ARRAY_SIZE(rss_hash_func_strings); 197 198 if (ops->get_sset_count && ops->get_strings) 199 return ops->get_sset_count(dev, sset); 200 else 201 return -EOPNOTSUPP; 202} 203 204static void __ethtool_get_strings(struct net_device *dev, 205 u32 stringset, u8 *data) 206{ 207 const struct ethtool_ops *ops = dev->ethtool_ops; 208 209 if (stringset == ETH_SS_FEATURES) 210 memcpy(data, netdev_features_strings, 211 sizeof(netdev_features_strings)); 212 else if (stringset == ETH_SS_RSS_HASH_FUNCS) 213 memcpy(data, rss_hash_func_strings, 214 sizeof(rss_hash_func_strings)); 215 else 216 /* ops->get_strings is valid because checked earlier */ 217 ops->get_strings(dev, stringset, data); 218} 219 220static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) 221{ 222 /* feature masks of legacy discrete ethtool ops */ 223 224 switch (eth_cmd) { 225 case ETHTOOL_GTXCSUM: 226 case ETHTOOL_STXCSUM: 227 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM; 228 case ETHTOOL_GRXCSUM: 229 case ETHTOOL_SRXCSUM: 230 return NETIF_F_RXCSUM; 231 case ETHTOOL_GSG: 232 case ETHTOOL_SSG: 233 return NETIF_F_SG; 234 case ETHTOOL_GTSO: 235 case ETHTOOL_STSO: 236 return NETIF_F_ALL_TSO; 237 case ETHTOOL_GUFO: 238 case ETHTOOL_SUFO: 239 return NETIF_F_UFO; 240 case ETHTOOL_GGSO: 241 case ETHTOOL_SGSO: 242 return NETIF_F_GSO; 243 case ETHTOOL_GGRO: 244 case ETHTOOL_SGRO: 245 return NETIF_F_GRO; 246 default: 247 BUG(); 248 } 249} 250 251static int ethtool_get_one_feature(struct net_device *dev, 252 char __user *useraddr, u32 ethcmd) 253{ 254 netdev_features_t mask = ethtool_get_feature_mask(ethcmd); 255 struct ethtool_value edata = { 256 .cmd = ethcmd, 257 .data = !!(dev->features & mask), 258 }; 259 260 if (copy_to_user(useraddr, &edata, sizeof(edata))) 261 return -EFAULT; 262 return 0; 263} 264 265static int ethtool_set_one_feature(struct net_device *dev, 266 void __user *useraddr, u32 ethcmd) 267{ 268 struct ethtool_value edata; 269 netdev_features_t mask; 270 271 if (copy_from_user(&edata, useraddr, sizeof(edata))) 272 return -EFAULT; 273 274 mask = ethtool_get_feature_mask(ethcmd); 275 mask &= dev->hw_features; 276 if (!mask) 277 return -EOPNOTSUPP; 278 279 if (edata.data) 280 dev->wanted_features |= mask; 281 else 282 dev->wanted_features &= ~mask; 283 284 __netdev_update_features(dev); 285 286 return 0; 287} 288 289#define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ 290 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) 291#define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \ 292 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \ 293 NETIF_F_RXHASH) 294 295static u32 __ethtool_get_flags(struct net_device *dev) 296{ 297 u32 flags = 0; 298 299 if (dev->features & NETIF_F_LRO) 300 flags |= ETH_FLAG_LRO; 301 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX) 302 flags |= ETH_FLAG_RXVLAN; 303 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) 304 flags |= ETH_FLAG_TXVLAN; 305 if (dev->features & NETIF_F_NTUPLE) 306 flags |= ETH_FLAG_NTUPLE; 307 if (dev->features & NETIF_F_RXHASH) 308 flags |= ETH_FLAG_RXHASH; 309 310 return flags; 311} 312 313static int __ethtool_set_flags(struct net_device *dev, u32 data) 314{ 315 netdev_features_t features = 0, changed; 316 317 if (data & ~ETH_ALL_FLAGS) 318 return -EINVAL; 319 320 if (data & ETH_FLAG_LRO) 321 features |= NETIF_F_LRO; 322 if (data & ETH_FLAG_RXVLAN) 323 features |= NETIF_F_HW_VLAN_CTAG_RX; 324 if (data & ETH_FLAG_TXVLAN) 325 features |= NETIF_F_HW_VLAN_CTAG_TX; 326 if (data & ETH_FLAG_NTUPLE) 327 features |= NETIF_F_NTUPLE; 328 if (data & ETH_FLAG_RXHASH) 329 features |= NETIF_F_RXHASH; 330 331 /* allow changing only bits set in hw_features */ 332 changed = (features ^ dev->features) & ETH_ALL_FEATURES; 333 if (changed & ~dev->hw_features) 334 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; 335 336 dev->wanted_features = 337 (dev->wanted_features & ~changed) | (features & changed); 338 339 __netdev_update_features(dev); 340 341 return 0; 342} 343 344int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) 345{ 346 ASSERT_RTNL(); 347 348 if (!dev->ethtool_ops->get_settings) 349 return -EOPNOTSUPP; 350 351 memset(cmd, 0, sizeof(struct ethtool_cmd)); 352 cmd->cmd = ETHTOOL_GSET; 353 return dev->ethtool_ops->get_settings(dev, cmd); 354} 355EXPORT_SYMBOL(__ethtool_get_settings); 356 357static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) 358{ 359 int err; 360 struct ethtool_cmd cmd; 361 362 err = __ethtool_get_settings(dev, &cmd); 363 if (err < 0) 364 return err; 365 366 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 367 return -EFAULT; 368 return 0; 369} 370 371static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) 372{ 373 struct ethtool_cmd cmd; 374 375 if (!dev->ethtool_ops->set_settings) 376 return -EOPNOTSUPP; 377 378 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 379 return -EFAULT; 380 381 return dev->ethtool_ops->set_settings(dev, &cmd); 382} 383 384static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev, 385 void __user *useraddr) 386{ 387 struct ethtool_drvinfo info; 388 const struct ethtool_ops *ops = dev->ethtool_ops; 389 390 memset(&info, 0, sizeof(info)); 391 info.cmd = ETHTOOL_GDRVINFO; 392 if (ops->get_drvinfo) { 393 ops->get_drvinfo(dev, &info); 394 } else if (dev->dev.parent && dev->dev.parent->driver) { 395 strlcpy(info.bus_info, dev_name(dev->dev.parent), 396 sizeof(info.bus_info)); 397 strlcpy(info.driver, dev->dev.parent->driver->name, 398 sizeof(info.driver)); 399 } else { 400 return -EOPNOTSUPP; 401 } 402 403 /* 404 * this method of obtaining string set info is deprecated; 405 * Use ETHTOOL_GSSET_INFO instead. 406 */ 407 if (ops->get_sset_count) { 408 int rc; 409 410 rc = ops->get_sset_count(dev, ETH_SS_TEST); 411 if (rc >= 0) 412 info.testinfo_len = rc; 413 rc = ops->get_sset_count(dev, ETH_SS_STATS); 414 if (rc >= 0) 415 info.n_stats = rc; 416 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); 417 if (rc >= 0) 418 info.n_priv_flags = rc; 419 } 420 if (ops->get_regs_len) 421 info.regdump_len = ops->get_regs_len(dev); 422 if (ops->get_eeprom_len) 423 info.eedump_len = ops->get_eeprom_len(dev); 424 425 if (copy_to_user(useraddr, &info, sizeof(info))) 426 return -EFAULT; 427 return 0; 428} 429 430static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, 431 void __user *useraddr) 432{ 433 struct ethtool_sset_info info; 434 u64 sset_mask; 435 int i, idx = 0, n_bits = 0, ret, rc; 436 u32 *info_buf = NULL; 437 438 if (copy_from_user(&info, useraddr, sizeof(info))) 439 return -EFAULT; 440 441 /* store copy of mask, because we zero struct later on */ 442 sset_mask = info.sset_mask; 443 if (!sset_mask) 444 return 0; 445 446 /* calculate size of return buffer */ 447 n_bits = hweight64(sset_mask); 448 449 memset(&info, 0, sizeof(info)); 450 info.cmd = ETHTOOL_GSSET_INFO; 451 452 info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER); 453 if (!info_buf) 454 return -ENOMEM; 455 456 /* 457 * fill return buffer based on input bitmask and successful 458 * get_sset_count return 459 */ 460 for (i = 0; i < 64; i++) { 461 if (!(sset_mask & (1ULL << i))) 462 continue; 463 464 rc = __ethtool_get_sset_count(dev, i); 465 if (rc >= 0) { 466 info.sset_mask |= (1ULL << i); 467 info_buf[idx++] = rc; 468 } 469 } 470 471 ret = -EFAULT; 472 if (copy_to_user(useraddr, &info, sizeof(info))) 473 goto out; 474 475 useraddr += offsetof(struct ethtool_sset_info, data); 476 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32))) 477 goto out; 478 479 ret = 0; 480 481out: 482 kfree(info_buf); 483 return ret; 484} 485 486static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, 487 u32 cmd, void __user *useraddr) 488{ 489 struct ethtool_rxnfc info; 490 size_t info_size = sizeof(info); 491 int rc; 492 493 if (!dev->ethtool_ops->set_rxnfc) 494 return -EOPNOTSUPP; 495 496 /* struct ethtool_rxnfc was originally defined for 497 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 498 * members. User-space might still be using that 499 * definition. */ 500 if (cmd == ETHTOOL_SRXFH) 501 info_size = (offsetof(struct ethtool_rxnfc, data) + 502 sizeof(info.data)); 503 504 if (copy_from_user(&info, useraddr, info_size)) 505 return -EFAULT; 506 507 rc = dev->ethtool_ops->set_rxnfc(dev, &info); 508 if (rc) 509 return rc; 510 511 if (cmd == ETHTOOL_SRXCLSRLINS && 512 copy_to_user(useraddr, &info, info_size)) 513 return -EFAULT; 514 515 return 0; 516} 517 518static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 519 u32 cmd, void __user *useraddr) 520{ 521 struct ethtool_rxnfc info; 522 size_t info_size = sizeof(info); 523 const struct ethtool_ops *ops = dev->ethtool_ops; 524 int ret; 525 void *rule_buf = NULL; 526 527 if (!ops->get_rxnfc) 528 return -EOPNOTSUPP; 529 530 /* struct ethtool_rxnfc was originally defined for 531 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 532 * members. User-space might still be using that 533 * definition. */ 534 if (cmd == ETHTOOL_GRXFH) 535 info_size = (offsetof(struct ethtool_rxnfc, data) + 536 sizeof(info.data)); 537 538 if (copy_from_user(&info, useraddr, info_size)) 539 return -EFAULT; 540 541 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 542 if (info.rule_cnt > 0) { 543 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 544 rule_buf = kzalloc(info.rule_cnt * sizeof(u32), 545 GFP_USER); 546 if (!rule_buf) 547 return -ENOMEM; 548 } 549 } 550 551 ret = ops->get_rxnfc(dev, &info, rule_buf); 552 if (ret < 0) 553 goto err_out; 554 555 ret = -EFAULT; 556 if (copy_to_user(useraddr, &info, info_size)) 557 goto err_out; 558 559 if (rule_buf) { 560 useraddr += offsetof(struct ethtool_rxnfc, rule_locs); 561 if (copy_to_user(useraddr, rule_buf, 562 info.rule_cnt * sizeof(u32))) 563 goto err_out; 564 } 565 ret = 0; 566 567err_out: 568 kfree(rule_buf); 569 570 return ret; 571} 572 573static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 574 struct ethtool_rxnfc *rx_rings, 575 u32 size) 576{ 577 int i; 578 579 if (copy_from_user(indir, useraddr, size * sizeof(indir[0]))) 580 return -EFAULT; 581 582 /* Validate ring indices */ 583 for (i = 0; i < size; i++) 584 if (indir[i] >= rx_rings->data) 585 return -EINVAL; 586 587 return 0; 588} 589 590u8 netdev_rss_key[NETDEV_RSS_KEY_LEN]; 591 592void netdev_rss_key_fill(void *buffer, size_t len) 593{ 594 BUG_ON(len > sizeof(netdev_rss_key)); 595 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 596 memcpy(buffer, netdev_rss_key, len); 597} 598EXPORT_SYMBOL(netdev_rss_key_fill); 599 600static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 601 void __user *useraddr) 602{ 603 u32 user_size, dev_size; 604 u32 *indir; 605 int ret; 606 607 if (!dev->ethtool_ops->get_rxfh_indir_size || 608 !dev->ethtool_ops->get_rxfh) 609 return -EOPNOTSUPP; 610 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 611 if (dev_size == 0) 612 return -EOPNOTSUPP; 613 614 if (copy_from_user(&user_size, 615 useraddr + offsetof(struct ethtool_rxfh_indir, size), 616 sizeof(user_size))) 617 return -EFAULT; 618 619 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 620 &dev_size, sizeof(dev_size))) 621 return -EFAULT; 622 623 /* If the user buffer size is 0, this is just a query for the 624 * device table size. Otherwise, if it's smaller than the 625 * device table size it's an error. 626 */ 627 if (user_size < dev_size) 628 return user_size == 0 ? 0 : -EINVAL; 629 630 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 631 if (!indir) 632 return -ENOMEM; 633 634 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL); 635 if (ret) 636 goto out; 637 638 if (copy_to_user(useraddr + 639 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 640 indir, dev_size * sizeof(indir[0]))) 641 ret = -EFAULT; 642 643out: 644 kfree(indir); 645 return ret; 646} 647 648static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 649 void __user *useraddr) 650{ 651 struct ethtool_rxnfc rx_rings; 652 u32 user_size, dev_size, i; 653 u32 *indir; 654 const struct ethtool_ops *ops = dev->ethtool_ops; 655 int ret; 656 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 657 658 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 659 !ops->get_rxnfc) 660 return -EOPNOTSUPP; 661 662 dev_size = ops->get_rxfh_indir_size(dev); 663 if (dev_size == 0) 664 return -EOPNOTSUPP; 665 666 if (copy_from_user(&user_size, 667 useraddr + offsetof(struct ethtool_rxfh_indir, size), 668 sizeof(user_size))) 669 return -EFAULT; 670 671 if (user_size != 0 && user_size != dev_size) 672 return -EINVAL; 673 674 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 675 if (!indir) 676 return -ENOMEM; 677 678 rx_rings.cmd = ETHTOOL_GRXRINGS; 679 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 680 if (ret) 681 goto out; 682 683 if (user_size == 0) { 684 for (i = 0; i < dev_size; i++) 685 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 686 } else { 687 ret = ethtool_copy_validate_indir(indir, 688 useraddr + ringidx_offset, 689 &rx_rings, 690 dev_size); 691 if (ret) 692 goto out; 693 } 694 695 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE); 696 697out: 698 kfree(indir); 699 return ret; 700} 701 702static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 703 void __user *useraddr) 704{ 705 int ret; 706 const struct ethtool_ops *ops = dev->ethtool_ops; 707 u32 user_indir_size, user_key_size; 708 u32 dev_indir_size = 0, dev_key_size = 0; 709 struct ethtool_rxfh rxfh; 710 u32 total_size; 711 u32 indir_bytes; 712 u32 *indir = NULL; 713 u8 dev_hfunc = 0; 714 u8 *hkey = NULL; 715 u8 *rss_config; 716 717 if (!ops->get_rxfh) 718 return -EOPNOTSUPP; 719 720 if (ops->get_rxfh_indir_size) 721 dev_indir_size = ops->get_rxfh_indir_size(dev); 722 if (ops->get_rxfh_key_size) 723 dev_key_size = ops->get_rxfh_key_size(dev); 724 725 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 726 return -EFAULT; 727 user_indir_size = rxfh.indir_size; 728 user_key_size = rxfh.key_size; 729 730 /* Check that reserved fields are 0 for now */ 731 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] || 732 rxfh.rsvd8[2] || rxfh.rsvd32) 733 return -EINVAL; 734 735 rxfh.indir_size = dev_indir_size; 736 rxfh.key_size = dev_key_size; 737 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 738 return -EFAULT; 739 740 if ((user_indir_size && (user_indir_size != dev_indir_size)) || 741 (user_key_size && (user_key_size != dev_key_size))) 742 return -EINVAL; 743 744 indir_bytes = user_indir_size * sizeof(indir[0]); 745 total_size = indir_bytes + user_key_size; 746 rss_config = kzalloc(total_size, GFP_USER); 747 if (!rss_config) 748 return -ENOMEM; 749 750 if (user_indir_size) 751 indir = (u32 *)rss_config; 752 753 if (user_key_size) 754 hkey = rss_config + indir_bytes; 755 756 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc); 757 if (ret) 758 goto out; 759 760 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 761 &dev_hfunc, sizeof(rxfh.hfunc))) { 762 ret = -EFAULT; 763 } else if (copy_to_user(useraddr + 764 offsetof(struct ethtool_rxfh, rss_config[0]), 765 rss_config, total_size)) { 766 ret = -EFAULT; 767 } 768out: 769 kfree(rss_config); 770 771 return ret; 772} 773 774static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 775 void __user *useraddr) 776{ 777 int ret; 778 const struct ethtool_ops *ops = dev->ethtool_ops; 779 struct ethtool_rxnfc rx_rings; 780 struct ethtool_rxfh rxfh; 781 u32 dev_indir_size = 0, dev_key_size = 0, i; 782 u32 *indir = NULL, indir_bytes = 0; 783 u8 *hkey = NULL; 784 u8 *rss_config; 785 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 786 787 if (!ops->get_rxnfc || !ops->set_rxfh) 788 return -EOPNOTSUPP; 789 790 if (ops->get_rxfh_indir_size) 791 dev_indir_size = ops->get_rxfh_indir_size(dev); 792 if (ops->get_rxfh_key_size) 793 dev_key_size = ops->get_rxfh_key_size(dev); 794 795 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 796 return -EFAULT; 797 798 /* Check that reserved fields are 0 for now */ 799 if (rxfh.rss_context || rxfh.rsvd8[0] || rxfh.rsvd8[1] || 800 rxfh.rsvd8[2] || rxfh.rsvd32) 801 return -EINVAL; 802 803 /* If either indir, hash key or function is valid, proceed further. 804 * Must request at least one change: indir size, hash key or function. 805 */ 806 if ((rxfh.indir_size && 807 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 808 rxfh.indir_size != dev_indir_size) || 809 (rxfh.key_size && (rxfh.key_size != dev_key_size)) || 810 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 811 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE)) 812 return -EINVAL; 813 814 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 815 indir_bytes = dev_indir_size * sizeof(indir[0]); 816 817 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER); 818 if (!rss_config) 819 return -ENOMEM; 820 821 rx_rings.cmd = ETHTOOL_GRXRINGS; 822 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 823 if (ret) 824 goto out; 825 826 /* rxfh.indir_size == 0 means reset the indir table to default. 827 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 828 */ 829 if (rxfh.indir_size && 830 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 831 indir = (u32 *)rss_config; 832 ret = ethtool_copy_validate_indir(indir, 833 useraddr + rss_cfg_offset, 834 &rx_rings, 835 rxfh.indir_size); 836 if (ret) 837 goto out; 838 } else if (rxfh.indir_size == 0) { 839 indir = (u32 *)rss_config; 840 for (i = 0; i < dev_indir_size; i++) 841 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 842 } 843 844 if (rxfh.key_size) { 845 hkey = rss_config + indir_bytes; 846 if (copy_from_user(hkey, 847 useraddr + rss_cfg_offset + indir_bytes, 848 rxfh.key_size)) { 849 ret = -EFAULT; 850 goto out; 851 } 852 } 853 854 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc); 855 856out: 857 kfree(rss_config); 858 return ret; 859} 860 861static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 862{ 863 struct ethtool_regs regs; 864 const struct ethtool_ops *ops = dev->ethtool_ops; 865 void *regbuf; 866 int reglen, ret; 867 868 if (!ops->get_regs || !ops->get_regs_len) 869 return -EOPNOTSUPP; 870 871 if (copy_from_user(®s, useraddr, sizeof(regs))) 872 return -EFAULT; 873 874 reglen = ops->get_regs_len(dev); 875 if (regs.len > reglen) 876 regs.len = reglen; 877 878 regbuf = vzalloc(reglen); 879 if (reglen && !regbuf) 880 return -ENOMEM; 881 882 ops->get_regs(dev, ®s, regbuf); 883 884 ret = -EFAULT; 885 if (copy_to_user(useraddr, ®s, sizeof(regs))) 886 goto out; 887 useraddr += offsetof(struct ethtool_regs, data); 888 if (regbuf && copy_to_user(useraddr, regbuf, regs.len)) 889 goto out; 890 ret = 0; 891 892 out: 893 vfree(regbuf); 894 return ret; 895} 896 897static int ethtool_reset(struct net_device *dev, char __user *useraddr) 898{ 899 struct ethtool_value reset; 900 int ret; 901 902 if (!dev->ethtool_ops->reset) 903 return -EOPNOTSUPP; 904 905 if (copy_from_user(&reset, useraddr, sizeof(reset))) 906 return -EFAULT; 907 908 ret = dev->ethtool_ops->reset(dev, &reset.data); 909 if (ret) 910 return ret; 911 912 if (copy_to_user(useraddr, &reset, sizeof(reset))) 913 return -EFAULT; 914 return 0; 915} 916 917static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 918{ 919 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL }; 920 921 if (!dev->ethtool_ops->get_wol) 922 return -EOPNOTSUPP; 923 924 dev->ethtool_ops->get_wol(dev, &wol); 925 926 if (copy_to_user(useraddr, &wol, sizeof(wol))) 927 return -EFAULT; 928 return 0; 929} 930 931static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 932{ 933 struct ethtool_wolinfo wol; 934 935 if (!dev->ethtool_ops->set_wol) 936 return -EOPNOTSUPP; 937 938 if (copy_from_user(&wol, useraddr, sizeof(wol))) 939 return -EFAULT; 940 941 return dev->ethtool_ops->set_wol(dev, &wol); 942} 943 944static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 945{ 946 struct ethtool_eee edata; 947 int rc; 948 949 if (!dev->ethtool_ops->get_eee) 950 return -EOPNOTSUPP; 951 952 memset(&edata, 0, sizeof(struct ethtool_eee)); 953 edata.cmd = ETHTOOL_GEEE; 954 rc = dev->ethtool_ops->get_eee(dev, &edata); 955 956 if (rc) 957 return rc; 958 959 if (copy_to_user(useraddr, &edata, sizeof(edata))) 960 return -EFAULT; 961 962 return 0; 963} 964 965static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 966{ 967 struct ethtool_eee edata; 968 969 if (!dev->ethtool_ops->set_eee) 970 return -EOPNOTSUPP; 971 972 if (copy_from_user(&edata, useraddr, sizeof(edata))) 973 return -EFAULT; 974 975 return dev->ethtool_ops->set_eee(dev, &edata); 976} 977 978static int ethtool_nway_reset(struct net_device *dev) 979{ 980 if (!dev->ethtool_ops->nway_reset) 981 return -EOPNOTSUPP; 982 983 return dev->ethtool_ops->nway_reset(dev); 984} 985 986static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 987{ 988 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 989 990 if (!dev->ethtool_ops->get_link) 991 return -EOPNOTSUPP; 992 993 edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev); 994 995 if (copy_to_user(useraddr, &edata, sizeof(edata))) 996 return -EFAULT; 997 return 0; 998} 999 1000static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1001 int (*getter)(struct net_device *, 1002 struct ethtool_eeprom *, u8 *), 1003 u32 total_len) 1004{ 1005 struct ethtool_eeprom eeprom; 1006 void __user *userbuf = useraddr + sizeof(eeprom); 1007 u32 bytes_remaining; 1008 u8 *data; 1009 int ret = 0; 1010 1011 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1012 return -EFAULT; 1013 1014 /* Check for wrap and zero */ 1015 if (eeprom.offset + eeprom.len <= eeprom.offset) 1016 return -EINVAL; 1017 1018 /* Check for exceeding total eeprom len */ 1019 if (eeprom.offset + eeprom.len > total_len) 1020 return -EINVAL; 1021 1022 data = kmalloc(PAGE_SIZE, GFP_USER); 1023 if (!data) 1024 return -ENOMEM; 1025 1026 bytes_remaining = eeprom.len; 1027 while (bytes_remaining > 0) { 1028 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1029 1030 ret = getter(dev, &eeprom, data); 1031 if (ret) 1032 break; 1033 if (copy_to_user(userbuf, data, eeprom.len)) { 1034 ret = -EFAULT; 1035 break; 1036 } 1037 userbuf += eeprom.len; 1038 eeprom.offset += eeprom.len; 1039 bytes_remaining -= eeprom.len; 1040 } 1041 1042 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1043 eeprom.offset -= eeprom.len; 1044 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1045 ret = -EFAULT; 1046 1047 kfree(data); 1048 return ret; 1049} 1050 1051static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1052{ 1053 const struct ethtool_ops *ops = dev->ethtool_ops; 1054 1055 if (!ops->get_eeprom || !ops->get_eeprom_len || 1056 !ops->get_eeprom_len(dev)) 1057 return -EOPNOTSUPP; 1058 1059 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1060 ops->get_eeprom_len(dev)); 1061} 1062 1063static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1064{ 1065 struct ethtool_eeprom eeprom; 1066 const struct ethtool_ops *ops = dev->ethtool_ops; 1067 void __user *userbuf = useraddr + sizeof(eeprom); 1068 u32 bytes_remaining; 1069 u8 *data; 1070 int ret = 0; 1071 1072 if (!ops->set_eeprom || !ops->get_eeprom_len || 1073 !ops->get_eeprom_len(dev)) 1074 return -EOPNOTSUPP; 1075 1076 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1077 return -EFAULT; 1078 1079 /* Check for wrap and zero */ 1080 if (eeprom.offset + eeprom.len <= eeprom.offset) 1081 return -EINVAL; 1082 1083 /* Check for exceeding total eeprom len */ 1084 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1085 return -EINVAL; 1086 1087 data = kmalloc(PAGE_SIZE, GFP_USER); 1088 if (!data) 1089 return -ENOMEM; 1090 1091 bytes_remaining = eeprom.len; 1092 while (bytes_remaining > 0) { 1093 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1094 1095 if (copy_from_user(data, userbuf, eeprom.len)) { 1096 ret = -EFAULT; 1097 break; 1098 } 1099 ret = ops->set_eeprom(dev, &eeprom, data); 1100 if (ret) 1101 break; 1102 userbuf += eeprom.len; 1103 eeprom.offset += eeprom.len; 1104 bytes_remaining -= eeprom.len; 1105 } 1106 1107 kfree(data); 1108 return ret; 1109} 1110 1111static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1112 void __user *useraddr) 1113{ 1114 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1115 1116 if (!dev->ethtool_ops->get_coalesce) 1117 return -EOPNOTSUPP; 1118 1119 dev->ethtool_ops->get_coalesce(dev, &coalesce); 1120 1121 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1122 return -EFAULT; 1123 return 0; 1124} 1125 1126static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1127 void __user *useraddr) 1128{ 1129 struct ethtool_coalesce coalesce; 1130 1131 if (!dev->ethtool_ops->set_coalesce) 1132 return -EOPNOTSUPP; 1133 1134 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1135 return -EFAULT; 1136 1137 return dev->ethtool_ops->set_coalesce(dev, &coalesce); 1138} 1139 1140static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1141{ 1142 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1143 1144 if (!dev->ethtool_ops->get_ringparam) 1145 return -EOPNOTSUPP; 1146 1147 dev->ethtool_ops->get_ringparam(dev, &ringparam); 1148 1149 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1150 return -EFAULT; 1151 return 0; 1152} 1153 1154static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1155{ 1156 struct ethtool_ringparam ringparam; 1157 1158 if (!dev->ethtool_ops->set_ringparam) 1159 return -EOPNOTSUPP; 1160 1161 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1162 return -EFAULT; 1163 1164 return dev->ethtool_ops->set_ringparam(dev, &ringparam); 1165} 1166 1167static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1168 void __user *useraddr) 1169{ 1170 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1171 1172 if (!dev->ethtool_ops->get_channels) 1173 return -EOPNOTSUPP; 1174 1175 dev->ethtool_ops->get_channels(dev, &channels); 1176 1177 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1178 return -EFAULT; 1179 return 0; 1180} 1181 1182static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1183 void __user *useraddr) 1184{ 1185 struct ethtool_channels channels; 1186 1187 if (!dev->ethtool_ops->set_channels) 1188 return -EOPNOTSUPP; 1189 1190 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1191 return -EFAULT; 1192 1193 return dev->ethtool_ops->set_channels(dev, &channels); 1194} 1195 1196static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1197{ 1198 struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM }; 1199 1200 if (!dev->ethtool_ops->get_pauseparam) 1201 return -EOPNOTSUPP; 1202 1203 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1204 1205 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1206 return -EFAULT; 1207 return 0; 1208} 1209 1210static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1211{ 1212 struct ethtool_pauseparam pauseparam; 1213 1214 if (!dev->ethtool_ops->set_pauseparam) 1215 return -EOPNOTSUPP; 1216 1217 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1218 return -EFAULT; 1219 1220 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1221} 1222 1223static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1224{ 1225 struct ethtool_test test; 1226 const struct ethtool_ops *ops = dev->ethtool_ops; 1227 u64 *data; 1228 int ret, test_len; 1229 1230 if (!ops->self_test || !ops->get_sset_count) 1231 return -EOPNOTSUPP; 1232 1233 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1234 if (test_len < 0) 1235 return test_len; 1236 WARN_ON(test_len == 0); 1237 1238 if (copy_from_user(&test, useraddr, sizeof(test))) 1239 return -EFAULT; 1240 1241 test.len = test_len; 1242 data = kmalloc(test_len * sizeof(u64), GFP_USER); 1243 if (!data) 1244 return -ENOMEM; 1245 1246 ops->self_test(dev, &test, data); 1247 1248 ret = -EFAULT; 1249 if (copy_to_user(useraddr, &test, sizeof(test))) 1250 goto out; 1251 useraddr += sizeof(test); 1252 if (copy_to_user(useraddr, data, test.len * sizeof(u64))) 1253 goto out; 1254 ret = 0; 1255 1256 out: 1257 kfree(data); 1258 return ret; 1259} 1260 1261static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1262{ 1263 struct ethtool_gstrings gstrings; 1264 u8 *data; 1265 int ret; 1266 1267 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1268 return -EFAULT; 1269 1270 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1271 if (ret < 0) 1272 return ret; 1273 1274 gstrings.len = ret; 1275 1276 data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER); 1277 if (!data) 1278 return -ENOMEM; 1279 1280 __ethtool_get_strings(dev, gstrings.string_set, data); 1281 1282 ret = -EFAULT; 1283 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1284 goto out; 1285 useraddr += sizeof(gstrings); 1286 if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) 1287 goto out; 1288 ret = 0; 1289 1290out: 1291 kfree(data); 1292 return ret; 1293} 1294 1295static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 1296{ 1297 struct ethtool_value id; 1298 static bool busy; 1299 const struct ethtool_ops *ops = dev->ethtool_ops; 1300 int rc; 1301 1302 if (!ops->set_phys_id) 1303 return -EOPNOTSUPP; 1304 1305 if (busy) 1306 return -EBUSY; 1307 1308 if (copy_from_user(&id, useraddr, sizeof(id))) 1309 return -EFAULT; 1310 1311 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 1312 if (rc < 0) 1313 return rc; 1314 1315 /* Drop the RTNL lock while waiting, but prevent reentry or 1316 * removal of the device. 1317 */ 1318 busy = true; 1319 dev_hold(dev); 1320 rtnl_unlock(); 1321 1322 if (rc == 0) { 1323 /* Driver will handle this itself */ 1324 schedule_timeout_interruptible( 1325 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 1326 } else { 1327 /* Driver expects to be called at twice the frequency in rc */ 1328 int n = rc * 2, i, interval = HZ / n; 1329 1330 /* Count down seconds */ 1331 do { 1332 /* Count down iterations per second */ 1333 i = n; 1334 do { 1335 rtnl_lock(); 1336 rc = ops->set_phys_id(dev, 1337 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 1338 rtnl_unlock(); 1339 if (rc) 1340 break; 1341 schedule_timeout_interruptible(interval); 1342 } while (!signal_pending(current) && --i != 0); 1343 } while (!signal_pending(current) && 1344 (id.data == 0 || --id.data != 0)); 1345 } 1346 1347 rtnl_lock(); 1348 dev_put(dev); 1349 busy = false; 1350 1351 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 1352 return rc; 1353} 1354 1355static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 1356{ 1357 struct ethtool_stats stats; 1358 const struct ethtool_ops *ops = dev->ethtool_ops; 1359 u64 *data; 1360 int ret, n_stats; 1361 1362 if (!ops->get_ethtool_stats || !ops->get_sset_count) 1363 return -EOPNOTSUPP; 1364 1365 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 1366 if (n_stats < 0) 1367 return n_stats; 1368 WARN_ON(n_stats == 0); 1369 1370 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1371 return -EFAULT; 1372 1373 stats.n_stats = n_stats; 1374 data = kmalloc(n_stats * sizeof(u64), GFP_USER); 1375 if (!data) 1376 return -ENOMEM; 1377 1378 ops->get_ethtool_stats(dev, &stats, data); 1379 1380 ret = -EFAULT; 1381 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1382 goto out; 1383 useraddr += sizeof(stats); 1384 if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64))) 1385 goto out; 1386 ret = 0; 1387 1388 out: 1389 kfree(data); 1390 return ret; 1391} 1392 1393static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 1394{ 1395 struct ethtool_perm_addr epaddr; 1396 1397 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 1398 return -EFAULT; 1399 1400 if (epaddr.size < dev->addr_len) 1401 return -ETOOSMALL; 1402 epaddr.size = dev->addr_len; 1403 1404 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 1405 return -EFAULT; 1406 useraddr += sizeof(epaddr); 1407 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 1408 return -EFAULT; 1409 return 0; 1410} 1411 1412static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 1413 u32 cmd, u32 (*actor)(struct net_device *)) 1414{ 1415 struct ethtool_value edata = { .cmd = cmd }; 1416 1417 if (!actor) 1418 return -EOPNOTSUPP; 1419 1420 edata.data = actor(dev); 1421 1422 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1423 return -EFAULT; 1424 return 0; 1425} 1426 1427static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 1428 void (*actor)(struct net_device *, u32)) 1429{ 1430 struct ethtool_value edata; 1431 1432 if (!actor) 1433 return -EOPNOTSUPP; 1434 1435 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1436 return -EFAULT; 1437 1438 actor(dev, edata.data); 1439 return 0; 1440} 1441 1442static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 1443 int (*actor)(struct net_device *, u32)) 1444{ 1445 struct ethtool_value edata; 1446 1447 if (!actor) 1448 return -EOPNOTSUPP; 1449 1450 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1451 return -EFAULT; 1452 1453 return actor(dev, edata.data); 1454} 1455 1456static noinline_for_stack int ethtool_flash_device(struct net_device *dev, 1457 char __user *useraddr) 1458{ 1459 struct ethtool_flash efl; 1460 1461 if (copy_from_user(&efl, useraddr, sizeof(efl))) 1462 return -EFAULT; 1463 1464 if (!dev->ethtool_ops->flash_device) 1465 return -EOPNOTSUPP; 1466 1467 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 1468 1469 return dev->ethtool_ops->flash_device(dev, &efl); 1470} 1471 1472static int ethtool_set_dump(struct net_device *dev, 1473 void __user *useraddr) 1474{ 1475 struct ethtool_dump dump; 1476 1477 if (!dev->ethtool_ops->set_dump) 1478 return -EOPNOTSUPP; 1479 1480 if (copy_from_user(&dump, useraddr, sizeof(dump))) 1481 return -EFAULT; 1482 1483 return dev->ethtool_ops->set_dump(dev, &dump); 1484} 1485 1486static int ethtool_get_dump_flag(struct net_device *dev, 1487 void __user *useraddr) 1488{ 1489 int ret; 1490 struct ethtool_dump dump; 1491 const struct ethtool_ops *ops = dev->ethtool_ops; 1492 1493 if (!ops->get_dump_flag) 1494 return -EOPNOTSUPP; 1495 1496 if (copy_from_user(&dump, useraddr, sizeof(dump))) 1497 return -EFAULT; 1498 1499 ret = ops->get_dump_flag(dev, &dump); 1500 if (ret) 1501 return ret; 1502 1503 if (copy_to_user(useraddr, &dump, sizeof(dump))) 1504 return -EFAULT; 1505 return 0; 1506} 1507 1508static int ethtool_get_dump_data(struct net_device *dev, 1509 void __user *useraddr) 1510{ 1511 int ret; 1512 __u32 len; 1513 struct ethtool_dump dump, tmp; 1514 const struct ethtool_ops *ops = dev->ethtool_ops; 1515 void *data = NULL; 1516 1517 if (!ops->get_dump_data || !ops->get_dump_flag) 1518 return -EOPNOTSUPP; 1519 1520 if (copy_from_user(&dump, useraddr, sizeof(dump))) 1521 return -EFAULT; 1522 1523 memset(&tmp, 0, sizeof(tmp)); 1524 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 1525 ret = ops->get_dump_flag(dev, &tmp); 1526 if (ret) 1527 return ret; 1528 1529 len = min(tmp.len, dump.len); 1530 if (!len) 1531 return -EFAULT; 1532 1533 /* Don't ever let the driver think there's more space available 1534 * than it requested with .get_dump_flag(). 1535 */ 1536 dump.len = len; 1537 1538 /* Always allocate enough space to hold the whole thing so that the 1539 * driver does not need to check the length and bother with partial 1540 * dumping. 1541 */ 1542 data = vzalloc(tmp.len); 1543 if (!data) 1544 return -ENOMEM; 1545 ret = ops->get_dump_data(dev, &dump, data); 1546 if (ret) 1547 goto out; 1548 1549 /* There are two sane possibilities: 1550 * 1. The driver's .get_dump_data() does not touch dump.len. 1551 * 2. Or it may set dump.len to how much it really writes, which 1552 * should be tmp.len (or len if it can do a partial dump). 1553 * In any case respond to userspace with the actual length of data 1554 * it's receiving. 1555 */ 1556 WARN_ON(dump.len != len && dump.len != tmp.len); 1557 dump.len = len; 1558 1559 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 1560 ret = -EFAULT; 1561 goto out; 1562 } 1563 useraddr += offsetof(struct ethtool_dump, data); 1564 if (copy_to_user(useraddr, data, len)) 1565 ret = -EFAULT; 1566out: 1567 vfree(data); 1568 return ret; 1569} 1570 1571static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 1572{ 1573 int err = 0; 1574 struct ethtool_ts_info info; 1575 const struct ethtool_ops *ops = dev->ethtool_ops; 1576 struct phy_device *phydev = dev->phydev; 1577 1578 memset(&info, 0, sizeof(info)); 1579 info.cmd = ETHTOOL_GET_TS_INFO; 1580 1581 if (phydev && phydev->drv && phydev->drv->ts_info) { 1582 err = phydev->drv->ts_info(phydev, &info); 1583 } else if (ops->get_ts_info) { 1584 err = ops->get_ts_info(dev, &info); 1585 } else { 1586 info.so_timestamping = 1587 SOF_TIMESTAMPING_RX_SOFTWARE | 1588 SOF_TIMESTAMPING_SOFTWARE; 1589 info.phc_index = -1; 1590 } 1591 1592 if (err) 1593 return err; 1594 1595 if (copy_to_user(useraddr, &info, sizeof(info))) 1596 err = -EFAULT; 1597 1598 return err; 1599} 1600 1601static int __ethtool_get_module_info(struct net_device *dev, 1602 struct ethtool_modinfo *modinfo) 1603{ 1604 const struct ethtool_ops *ops = dev->ethtool_ops; 1605 struct phy_device *phydev = dev->phydev; 1606 1607 if (phydev && phydev->drv && phydev->drv->module_info) 1608 return phydev->drv->module_info(phydev, modinfo); 1609 1610 if (ops->get_module_info) 1611 return ops->get_module_info(dev, modinfo); 1612 1613 return -EOPNOTSUPP; 1614} 1615 1616static int ethtool_get_module_info(struct net_device *dev, 1617 void __user *useraddr) 1618{ 1619 int ret; 1620 struct ethtool_modinfo modinfo; 1621 1622 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 1623 return -EFAULT; 1624 1625 ret = __ethtool_get_module_info(dev, &modinfo); 1626 if (ret) 1627 return ret; 1628 1629 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 1630 return -EFAULT; 1631 1632 return 0; 1633} 1634 1635static int __ethtool_get_module_eeprom(struct net_device *dev, 1636 struct ethtool_eeprom *ee, u8 *data) 1637{ 1638 const struct ethtool_ops *ops = dev->ethtool_ops; 1639 struct phy_device *phydev = dev->phydev; 1640 1641 if (phydev && phydev->drv && phydev->drv->module_eeprom) 1642 return phydev->drv->module_eeprom(phydev, ee, data); 1643 1644 if (ops->get_module_eeprom) 1645 return ops->get_module_eeprom(dev, ee, data); 1646 1647 return -EOPNOTSUPP; 1648} 1649 1650static int ethtool_get_module_eeprom(struct net_device *dev, 1651 void __user *useraddr) 1652{ 1653 int ret; 1654 struct ethtool_modinfo modinfo; 1655 1656 ret = __ethtool_get_module_info(dev, &modinfo); 1657 if (ret) 1658 return ret; 1659 1660 return ethtool_get_any_eeprom(dev, useraddr, 1661 __ethtool_get_module_eeprom, 1662 modinfo.eeprom_len); 1663} 1664 1665static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 1666{ 1667 switch (tuna->id) { 1668 case ETHTOOL_RX_COPYBREAK: 1669 case ETHTOOL_TX_COPYBREAK: 1670 if (tuna->len != sizeof(u32) || 1671 tuna->type_id != ETHTOOL_TUNABLE_U32) 1672 return -EINVAL; 1673 break; 1674 default: 1675 return -EINVAL; 1676 } 1677 1678 return 0; 1679} 1680 1681static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 1682{ 1683 int ret; 1684 struct ethtool_tunable tuna; 1685 const struct ethtool_ops *ops = dev->ethtool_ops; 1686 void *data; 1687 1688 if (!ops->get_tunable) 1689 return -EOPNOTSUPP; 1690 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 1691 return -EFAULT; 1692 ret = ethtool_tunable_valid(&tuna); 1693 if (ret) 1694 return ret; 1695 data = kmalloc(tuna.len, GFP_USER); 1696 if (!data) 1697 return -ENOMEM; 1698 ret = ops->get_tunable(dev, &tuna, data); 1699 if (ret) 1700 goto out; 1701 useraddr += sizeof(tuna); 1702 ret = -EFAULT; 1703 if (copy_to_user(useraddr, data, tuna.len)) 1704 goto out; 1705 ret = 0; 1706 1707out: 1708 kfree(data); 1709 return ret; 1710} 1711 1712static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 1713{ 1714 int ret; 1715 struct ethtool_tunable tuna; 1716 const struct ethtool_ops *ops = dev->ethtool_ops; 1717 void *data; 1718 1719 if (!ops->set_tunable) 1720 return -EOPNOTSUPP; 1721 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 1722 return -EFAULT; 1723 ret = ethtool_tunable_valid(&tuna); 1724 if (ret) 1725 return ret; 1726 data = kmalloc(tuna.len, GFP_USER); 1727 if (!data) 1728 return -ENOMEM; 1729 useraddr += sizeof(tuna); 1730 ret = -EFAULT; 1731 if (copy_from_user(data, useraddr, tuna.len)) 1732 goto out; 1733 ret = ops->set_tunable(dev, &tuna, data); 1734 1735out: 1736 kfree(data); 1737 return ret; 1738} 1739 1740/* The main entry point in this file. Called from net/core/dev_ioctl.c */ 1741 1742int dev_ethtool(struct net *net, struct ifreq *ifr) 1743{ 1744 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 1745 void __user *useraddr = ifr->ifr_data; 1746 u32 ethcmd; 1747 int rc; 1748 netdev_features_t old_features; 1749 1750 if (!dev || !netif_device_present(dev)) 1751 return -ENODEV; 1752 1753 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 1754 return -EFAULT; 1755 1756 /* Allow some commands to be done by anyone */ 1757 switch (ethcmd) { 1758 case ETHTOOL_GSET: 1759 case ETHTOOL_GDRVINFO: 1760 case ETHTOOL_GMSGLVL: 1761 case ETHTOOL_GLINK: 1762 case ETHTOOL_GCOALESCE: 1763 case ETHTOOL_GRINGPARAM: 1764 case ETHTOOL_GPAUSEPARAM: 1765 case ETHTOOL_GRXCSUM: 1766 case ETHTOOL_GTXCSUM: 1767 case ETHTOOL_GSG: 1768 case ETHTOOL_GSSET_INFO: 1769 case ETHTOOL_GSTRINGS: 1770 case ETHTOOL_GSTATS: 1771 case ETHTOOL_GTSO: 1772 case ETHTOOL_GPERMADDR: 1773 case ETHTOOL_GUFO: 1774 case ETHTOOL_GGSO: 1775 case ETHTOOL_GGRO: 1776 case ETHTOOL_GFLAGS: 1777 case ETHTOOL_GPFLAGS: 1778 case ETHTOOL_GRXFH: 1779 case ETHTOOL_GRXRINGS: 1780 case ETHTOOL_GRXCLSRLCNT: 1781 case ETHTOOL_GRXCLSRULE: 1782 case ETHTOOL_GRXCLSRLALL: 1783 case ETHTOOL_GRXFHINDIR: 1784 case ETHTOOL_GRSSH: 1785 case ETHTOOL_GFEATURES: 1786 case ETHTOOL_GCHANNELS: 1787 case ETHTOOL_GET_TS_INFO: 1788 case ETHTOOL_GEEE: 1789 case ETHTOOL_GTUNABLE: 1790 break; 1791 default: 1792 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 1793 return -EPERM; 1794 } 1795 1796 if (dev->ethtool_ops->begin) { 1797 rc = dev->ethtool_ops->begin(dev); 1798 if (rc < 0) 1799 return rc; 1800 } 1801 old_features = dev->features; 1802 1803 switch (ethcmd) { 1804 case ETHTOOL_GSET: 1805 rc = ethtool_get_settings(dev, useraddr); 1806 break; 1807 case ETHTOOL_SSET: 1808 rc = ethtool_set_settings(dev, useraddr); 1809 break; 1810 case ETHTOOL_GDRVINFO: 1811 rc = ethtool_get_drvinfo(dev, useraddr); 1812 break; 1813 case ETHTOOL_GREGS: 1814 rc = ethtool_get_regs(dev, useraddr); 1815 break; 1816 case ETHTOOL_GWOL: 1817 rc = ethtool_get_wol(dev, useraddr); 1818 break; 1819 case ETHTOOL_SWOL: 1820 rc = ethtool_set_wol(dev, useraddr); 1821 break; 1822 case ETHTOOL_GMSGLVL: 1823 rc = ethtool_get_value(dev, useraddr, ethcmd, 1824 dev->ethtool_ops->get_msglevel); 1825 break; 1826 case ETHTOOL_SMSGLVL: 1827 rc = ethtool_set_value_void(dev, useraddr, 1828 dev->ethtool_ops->set_msglevel); 1829 break; 1830 case ETHTOOL_GEEE: 1831 rc = ethtool_get_eee(dev, useraddr); 1832 break; 1833 case ETHTOOL_SEEE: 1834 rc = ethtool_set_eee(dev, useraddr); 1835 break; 1836 case ETHTOOL_NWAY_RST: 1837 rc = ethtool_nway_reset(dev); 1838 break; 1839 case ETHTOOL_GLINK: 1840 rc = ethtool_get_link(dev, useraddr); 1841 break; 1842 case ETHTOOL_GEEPROM: 1843 rc = ethtool_get_eeprom(dev, useraddr); 1844 break; 1845 case ETHTOOL_SEEPROM: 1846 rc = ethtool_set_eeprom(dev, useraddr); 1847 break; 1848 case ETHTOOL_GCOALESCE: 1849 rc = ethtool_get_coalesce(dev, useraddr); 1850 break; 1851 case ETHTOOL_SCOALESCE: 1852 rc = ethtool_set_coalesce(dev, useraddr); 1853 break; 1854 case ETHTOOL_GRINGPARAM: 1855 rc = ethtool_get_ringparam(dev, useraddr); 1856 break; 1857 case ETHTOOL_SRINGPARAM: 1858 rc = ethtool_set_ringparam(dev, useraddr); 1859 break; 1860 case ETHTOOL_GPAUSEPARAM: 1861 rc = ethtool_get_pauseparam(dev, useraddr); 1862 break; 1863 case ETHTOOL_SPAUSEPARAM: 1864 rc = ethtool_set_pauseparam(dev, useraddr); 1865 break; 1866 case ETHTOOL_TEST: 1867 rc = ethtool_self_test(dev, useraddr); 1868 break; 1869 case ETHTOOL_GSTRINGS: 1870 rc = ethtool_get_strings(dev, useraddr); 1871 break; 1872 case ETHTOOL_PHYS_ID: 1873 rc = ethtool_phys_id(dev, useraddr); 1874 break; 1875 case ETHTOOL_GSTATS: 1876 rc = ethtool_get_stats(dev, useraddr); 1877 break; 1878 case ETHTOOL_GPERMADDR: 1879 rc = ethtool_get_perm_addr(dev, useraddr); 1880 break; 1881 case ETHTOOL_GFLAGS: 1882 rc = ethtool_get_value(dev, useraddr, ethcmd, 1883 __ethtool_get_flags); 1884 break; 1885 case ETHTOOL_SFLAGS: 1886 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 1887 break; 1888 case ETHTOOL_GPFLAGS: 1889 rc = ethtool_get_value(dev, useraddr, ethcmd, 1890 dev->ethtool_ops->get_priv_flags); 1891 break; 1892 case ETHTOOL_SPFLAGS: 1893 rc = ethtool_set_value(dev, useraddr, 1894 dev->ethtool_ops->set_priv_flags); 1895 break; 1896 case ETHTOOL_GRXFH: 1897 case ETHTOOL_GRXRINGS: 1898 case ETHTOOL_GRXCLSRLCNT: 1899 case ETHTOOL_GRXCLSRULE: 1900 case ETHTOOL_GRXCLSRLALL: 1901 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 1902 break; 1903 case ETHTOOL_SRXFH: 1904 case ETHTOOL_SRXCLSRLDEL: 1905 case ETHTOOL_SRXCLSRLINS: 1906 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 1907 break; 1908 case ETHTOOL_FLASHDEV: 1909 rc = ethtool_flash_device(dev, useraddr); 1910 break; 1911 case ETHTOOL_RESET: 1912 rc = ethtool_reset(dev, useraddr); 1913 break; 1914 case ETHTOOL_GSSET_INFO: 1915 rc = ethtool_get_sset_info(dev, useraddr); 1916 break; 1917 case ETHTOOL_GRXFHINDIR: 1918 rc = ethtool_get_rxfh_indir(dev, useraddr); 1919 break; 1920 case ETHTOOL_SRXFHINDIR: 1921 rc = ethtool_set_rxfh_indir(dev, useraddr); 1922 break; 1923 case ETHTOOL_GRSSH: 1924 rc = ethtool_get_rxfh(dev, useraddr); 1925 break; 1926 case ETHTOOL_SRSSH: 1927 rc = ethtool_set_rxfh(dev, useraddr); 1928 break; 1929 case ETHTOOL_GFEATURES: 1930 rc = ethtool_get_features(dev, useraddr); 1931 break; 1932 case ETHTOOL_SFEATURES: 1933 rc = ethtool_set_features(dev, useraddr); 1934 break; 1935 case ETHTOOL_GTXCSUM: 1936 case ETHTOOL_GRXCSUM: 1937 case ETHTOOL_GSG: 1938 case ETHTOOL_GTSO: 1939 case ETHTOOL_GUFO: 1940 case ETHTOOL_GGSO: 1941 case ETHTOOL_GGRO: 1942 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 1943 break; 1944 case ETHTOOL_STXCSUM: 1945 case ETHTOOL_SRXCSUM: 1946 case ETHTOOL_SSG: 1947 case ETHTOOL_STSO: 1948 case ETHTOOL_SUFO: 1949 case ETHTOOL_SGSO: 1950 case ETHTOOL_SGRO: 1951 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 1952 break; 1953 case ETHTOOL_GCHANNELS: 1954 rc = ethtool_get_channels(dev, useraddr); 1955 break; 1956 case ETHTOOL_SCHANNELS: 1957 rc = ethtool_set_channels(dev, useraddr); 1958 break; 1959 case ETHTOOL_SET_DUMP: 1960 rc = ethtool_set_dump(dev, useraddr); 1961 break; 1962 case ETHTOOL_GET_DUMP_FLAG: 1963 rc = ethtool_get_dump_flag(dev, useraddr); 1964 break; 1965 case ETHTOOL_GET_DUMP_DATA: 1966 rc = ethtool_get_dump_data(dev, useraddr); 1967 break; 1968 case ETHTOOL_GET_TS_INFO: 1969 rc = ethtool_get_ts_info(dev, useraddr); 1970 break; 1971 case ETHTOOL_GMODULEINFO: 1972 rc = ethtool_get_module_info(dev, useraddr); 1973 break; 1974 case ETHTOOL_GMODULEEEPROM: 1975 rc = ethtool_get_module_eeprom(dev, useraddr); 1976 break; 1977 case ETHTOOL_GTUNABLE: 1978 rc = ethtool_get_tunable(dev, useraddr); 1979 break; 1980 case ETHTOOL_STUNABLE: 1981 rc = ethtool_set_tunable(dev, useraddr); 1982 break; 1983 default: 1984 rc = -EOPNOTSUPP; 1985 } 1986 1987 if (dev->ethtool_ops->complete) 1988 dev->ethtool_ops->complete(dev); 1989 1990 if (old_features != dev->features) 1991 netdev_features_change(dev); 1992 1993 return rc; 1994} 1995