1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/core/ethtool.c - Ethtool ioctl handler 4 * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx> 5 * 6 * This file is where we call all the ethtool_ops commands to get 7 * the information ethtool needs. 8 */ 9 10 #include <linux/module.h> 11 #include <linux/types.h> 12 #include <linux/capability.h> 13 #include <linux/errno.h> 14 #include <linux/ethtool.h> 15 #include <linux/netdevice.h> 16 #include <linux/net_tstamp.h> 17 #include <linux/phy.h> 18 #include <linux/bitops.h> 19 #include <linux/uaccess.h> 20 #include <linux/vmalloc.h> 21 #include <linux/sfp.h> 22 #include <linux/slab.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/sched/signal.h> 25 #include <linux/net.h> 26 #include <net/devlink.h> 27 #include <net/xdp_sock.h> 28 #include <net/flow_offload.h> 29 #include <linux/ethtool_netlink.h> 30 #include <generated/utsrelease.h> 31 #include "common.h" 32 33 /* 34 * Some useful ethtool_ops methods that're device independent. 35 * If we find that all drivers want to do the same thing here, 36 * we can turn these into dev_() function calls. 37 */ 38 39 u32 ethtool_op_get_link(struct net_device *dev) 40 { 41 return netif_carrier_ok(dev) ? 1 : 0; 42 } 43 EXPORT_SYMBOL(ethtool_op_get_link); 44 45 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) 46 { 47 info->so_timestamping = 48 SOF_TIMESTAMPING_TX_SOFTWARE | 49 SOF_TIMESTAMPING_RX_SOFTWARE | 50 SOF_TIMESTAMPING_SOFTWARE; 51 info->phc_index = -1; 52 return 0; 53 } 54 EXPORT_SYMBOL(ethtool_op_get_ts_info); 55 56 /* Handlers for each ethtool command */ 57 58 static int ethtool_get_features(struct net_device *dev, void __user *useraddr) 59 { 60 struct ethtool_gfeatures cmd = { 61 .cmd = ETHTOOL_GFEATURES, 62 .size = ETHTOOL_DEV_FEATURE_WORDS, 63 }; 64 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 65 u32 __user *sizeaddr; 66 u32 copy_size; 67 int i; 68 69 /* in case feature bits run out again */ 70 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t)); 71 72 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 73 features[i].available = (u32)(dev->hw_features >> (32 * i)); 74 features[i].requested = (u32)(dev->wanted_features >> (32 * i)); 75 features[i].active = (u32)(dev->features >> (32 * i)); 76 features[i].never_changed = 77 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i)); 78 } 79 80 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size); 81 if (get_user(copy_size, sizeaddr)) 82 return -EFAULT; 83 84 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS) 85 copy_size = ETHTOOL_DEV_FEATURE_WORDS; 86 87 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 88 return -EFAULT; 89 useraddr += sizeof(cmd); 90 if (copy_to_user(useraddr, features, copy_size * sizeof(*features))) 91 return -EFAULT; 92 93 return 0; 94 } 95 96 static int ethtool_set_features(struct net_device *dev, void __user *useraddr) 97 { 98 struct ethtool_sfeatures cmd; 99 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 100 netdev_features_t wanted = 0, valid = 0; 101 int i, ret = 0; 102 103 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 104 return -EFAULT; 105 useraddr += sizeof(cmd); 106 107 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS) 108 return -EINVAL; 109 110 if (copy_from_user(features, useraddr, sizeof(features))) 111 return -EFAULT; 112 113 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 114 valid |= (netdev_features_t)features[i].valid << (32 * i); 115 wanted |= (netdev_features_t)features[i].requested << (32 * i); 116 } 117 118 if (valid & ~NETIF_F_ETHTOOL_BITS) 119 return -EINVAL; 120 121 if (valid & ~dev->hw_features) { 122 valid &= dev->hw_features; 123 ret |= ETHTOOL_F_UNSUPPORTED; 124 } 125 126 dev->wanted_features &= ~valid; 127 dev->wanted_features |= wanted & valid; 128 __netdev_update_features(dev); 129 130 if ((dev->wanted_features ^ dev->features) & valid) 131 ret |= ETHTOOL_F_WISH; 132 133 return ret; 134 } 135 136 static int __ethtool_get_sset_count(struct net_device *dev, int sset) 137 { 138 const struct ethtool_ops *ops = dev->ethtool_ops; 139 140 if (sset == ETH_SS_FEATURES) 141 return ARRAY_SIZE(netdev_features_strings); 142 143 if (sset == ETH_SS_RSS_HASH_FUNCS) 144 return ARRAY_SIZE(rss_hash_func_strings); 145 146 if (sset == ETH_SS_TUNABLES) 147 return ARRAY_SIZE(tunable_strings); 148 149 if (sset == ETH_SS_PHY_TUNABLES) 150 return ARRAY_SIZE(phy_tunable_strings); 151 152 if (sset == ETH_SS_PHY_STATS && dev->phydev && 153 !ops->get_ethtool_phy_stats) 154 return phy_ethtool_get_sset_count(dev->phydev); 155 156 if (sset == ETH_SS_LINK_MODES) 157 return __ETHTOOL_LINK_MODE_MASK_NBITS; 158 159 if (ops->get_sset_count && ops->get_strings) 160 return ops->get_sset_count(dev, sset); 161 else 162 return -EOPNOTSUPP; 163 } 164 165 static void __ethtool_get_strings(struct net_device *dev, 166 u32 stringset, u8 *data) 167 { 168 const struct ethtool_ops *ops = dev->ethtool_ops; 169 170 if (stringset == ETH_SS_FEATURES) 171 memcpy(data, netdev_features_strings, 172 sizeof(netdev_features_strings)); 173 else if (stringset == ETH_SS_RSS_HASH_FUNCS) 174 memcpy(data, rss_hash_func_strings, 175 sizeof(rss_hash_func_strings)); 176 else if (stringset == ETH_SS_TUNABLES) 177 memcpy(data, tunable_strings, sizeof(tunable_strings)); 178 else if (stringset == ETH_SS_PHY_TUNABLES) 179 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings)); 180 else if (stringset == ETH_SS_PHY_STATS && dev->phydev && 181 !ops->get_ethtool_phy_stats) 182 phy_ethtool_get_strings(dev->phydev, data); 183 else if (stringset == ETH_SS_LINK_MODES) 184 memcpy(data, link_mode_names, 185 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN); 186 else 187 /* ops->get_strings is valid because checked earlier */ 188 ops->get_strings(dev, stringset, data); 189 } 190 191 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) 192 { 193 /* feature masks of legacy discrete ethtool ops */ 194 195 switch (eth_cmd) { 196 case ETHTOOL_GTXCSUM: 197 case ETHTOOL_STXCSUM: 198 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC | 199 NETIF_F_SCTP_CRC; 200 case ETHTOOL_GRXCSUM: 201 case ETHTOOL_SRXCSUM: 202 return NETIF_F_RXCSUM; 203 case ETHTOOL_GSG: 204 case ETHTOOL_SSG: 205 return NETIF_F_SG | NETIF_F_FRAGLIST; 206 case ETHTOOL_GTSO: 207 case ETHTOOL_STSO: 208 return NETIF_F_ALL_TSO; 209 case ETHTOOL_GGSO: 210 case ETHTOOL_SGSO: 211 return NETIF_F_GSO; 212 case ETHTOOL_GGRO: 213 case ETHTOOL_SGRO: 214 return NETIF_F_GRO; 215 default: 216 BUG(); 217 } 218 } 219 220 static int ethtool_get_one_feature(struct net_device *dev, 221 char __user *useraddr, u32 ethcmd) 222 { 223 netdev_features_t mask = ethtool_get_feature_mask(ethcmd); 224 struct ethtool_value edata = { 225 .cmd = ethcmd, 226 .data = !!(dev->features & mask), 227 }; 228 229 if (copy_to_user(useraddr, &edata, sizeof(edata))) 230 return -EFAULT; 231 return 0; 232 } 233 234 static int ethtool_set_one_feature(struct net_device *dev, 235 void __user *useraddr, u32 ethcmd) 236 { 237 struct ethtool_value edata; 238 netdev_features_t mask; 239 240 if (copy_from_user(&edata, useraddr, sizeof(edata))) 241 return -EFAULT; 242 243 mask = ethtool_get_feature_mask(ethcmd); 244 mask &= dev->hw_features; 245 if (!mask) 246 return -EOPNOTSUPP; 247 248 if (edata.data) 249 dev->wanted_features |= mask; 250 else 251 dev->wanted_features &= ~mask; 252 253 __netdev_update_features(dev); 254 255 return 0; 256 } 257 258 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ 259 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) 260 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \ 261 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \ 262 NETIF_F_RXHASH) 263 264 static u32 __ethtool_get_flags(struct net_device *dev) 265 { 266 u32 flags = 0; 267 268 if (dev->features & NETIF_F_LRO) 269 flags |= ETH_FLAG_LRO; 270 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX) 271 flags |= ETH_FLAG_RXVLAN; 272 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) 273 flags |= ETH_FLAG_TXVLAN; 274 if (dev->features & NETIF_F_NTUPLE) 275 flags |= ETH_FLAG_NTUPLE; 276 if (dev->features & NETIF_F_RXHASH) 277 flags |= ETH_FLAG_RXHASH; 278 279 return flags; 280 } 281 282 static int __ethtool_set_flags(struct net_device *dev, u32 data) 283 { 284 netdev_features_t features = 0, changed; 285 286 if (data & ~ETH_ALL_FLAGS) 287 return -EINVAL; 288 289 if (data & ETH_FLAG_LRO) 290 features |= NETIF_F_LRO; 291 if (data & ETH_FLAG_RXVLAN) 292 features |= NETIF_F_HW_VLAN_CTAG_RX; 293 if (data & ETH_FLAG_TXVLAN) 294 features |= NETIF_F_HW_VLAN_CTAG_TX; 295 if (data & ETH_FLAG_NTUPLE) 296 features |= NETIF_F_NTUPLE; 297 if (data & ETH_FLAG_RXHASH) 298 features |= NETIF_F_RXHASH; 299 300 /* allow changing only bits set in hw_features */ 301 changed = (features ^ dev->features) & ETH_ALL_FEATURES; 302 if (changed & ~dev->hw_features) 303 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; 304 305 dev->wanted_features = 306 (dev->wanted_features & ~changed) | (features & changed); 307 308 __netdev_update_features(dev); 309 310 return 0; 311 } 312 313 /* Given two link masks, AND them together and save the result in dst. */ 314 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst, 315 struct ethtool_link_ksettings *src) 316 { 317 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS); 318 unsigned int idx = 0; 319 320 for (; idx < size; idx++) { 321 dst->link_modes.supported[idx] &= 322 src->link_modes.supported[idx]; 323 dst->link_modes.advertising[idx] &= 324 src->link_modes.advertising[idx]; 325 } 326 } 327 EXPORT_SYMBOL(ethtool_intersect_link_masks); 328 329 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst, 330 u32 legacy_u32) 331 { 332 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS); 333 dst[0] = legacy_u32; 334 } 335 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode); 336 337 /* return false if src had higher bits set. lower bits always updated. */ 338 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, 339 const unsigned long *src) 340 { 341 bool retval = true; 342 343 /* TODO: following test will soon always be true */ 344 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) { 345 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext); 346 347 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 348 bitmap_fill(ext, 32); 349 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 350 if (bitmap_intersects(ext, src, 351 __ETHTOOL_LINK_MODE_MASK_NBITS)) { 352 /* src mask goes beyond bit 31 */ 353 retval = false; 354 } 355 } 356 *legacy_u32 = src[0]; 357 return retval; 358 } 359 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); 360 361 /* return false if ksettings link modes had higher bits 362 * set. legacy_settings always updated (best effort) 363 */ 364 static bool 365 convert_link_ksettings_to_legacy_settings( 366 struct ethtool_cmd *legacy_settings, 367 const struct ethtool_link_ksettings *link_ksettings) 368 { 369 bool retval = true; 370 371 memset(legacy_settings, 0, sizeof(*legacy_settings)); 372 /* this also clears the deprecated fields in legacy structure: 373 * __u8 transceiver; 374 * __u32 maxtxpkt; 375 * __u32 maxrxpkt; 376 */ 377 378 retval &= ethtool_convert_link_mode_to_legacy_u32( 379 &legacy_settings->supported, 380 link_ksettings->link_modes.supported); 381 retval &= ethtool_convert_link_mode_to_legacy_u32( 382 &legacy_settings->advertising, 383 link_ksettings->link_modes.advertising); 384 retval &= ethtool_convert_link_mode_to_legacy_u32( 385 &legacy_settings->lp_advertising, 386 link_ksettings->link_modes.lp_advertising); 387 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed); 388 legacy_settings->duplex 389 = link_ksettings->base.duplex; 390 legacy_settings->port 391 = link_ksettings->base.port; 392 legacy_settings->phy_address 393 = link_ksettings->base.phy_address; 394 legacy_settings->autoneg 395 = link_ksettings->base.autoneg; 396 legacy_settings->mdio_support 397 = link_ksettings->base.mdio_support; 398 legacy_settings->eth_tp_mdix 399 = link_ksettings->base.eth_tp_mdix; 400 legacy_settings->eth_tp_mdix_ctrl 401 = link_ksettings->base.eth_tp_mdix_ctrl; 402 legacy_settings->transceiver 403 = link_ksettings->base.transceiver; 404 return retval; 405 } 406 407 /* number of 32-bit words to store the user's link mode bitmaps */ 408 #define __ETHTOOL_LINK_MODE_MASK_NU32 \ 409 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32) 410 411 /* layout of the struct passed from/to userland */ 412 struct ethtool_link_usettings { 413 struct ethtool_link_settings base; 414 struct { 415 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32]; 416 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 417 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 418 } link_modes; 419 }; 420 421 /* Internal kernel helper to query a device ethtool_link_settings. */ 422 int __ethtool_get_link_ksettings(struct net_device *dev, 423 struct ethtool_link_ksettings *link_ksettings) 424 { 425 ASSERT_RTNL(); 426 427 if (!dev->ethtool_ops->get_link_ksettings) 428 return -EOPNOTSUPP; 429 430 memset(link_ksettings, 0, sizeof(*link_ksettings)); 431 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings); 432 } 433 EXPORT_SYMBOL(__ethtool_get_link_ksettings); 434 435 /* convert ethtool_link_usettings in user space to a kernel internal 436 * ethtool_link_ksettings. return 0 on success, errno on error. 437 */ 438 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to, 439 const void __user *from) 440 { 441 struct ethtool_link_usettings link_usettings; 442 443 if (copy_from_user(&link_usettings, from, sizeof(link_usettings))) 444 return -EFAULT; 445 446 memcpy(&to->base, &link_usettings.base, sizeof(to->base)); 447 bitmap_from_arr32(to->link_modes.supported, 448 link_usettings.link_modes.supported, 449 __ETHTOOL_LINK_MODE_MASK_NBITS); 450 bitmap_from_arr32(to->link_modes.advertising, 451 link_usettings.link_modes.advertising, 452 __ETHTOOL_LINK_MODE_MASK_NBITS); 453 bitmap_from_arr32(to->link_modes.lp_advertising, 454 link_usettings.link_modes.lp_advertising, 455 __ETHTOOL_LINK_MODE_MASK_NBITS); 456 457 return 0; 458 } 459 460 /* Check if the user is trying to change anything besides speed/duplex */ 461 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd) 462 { 463 struct ethtool_link_settings base2 = {}; 464 465 base2.speed = cmd->base.speed; 466 base2.port = PORT_OTHER; 467 base2.duplex = cmd->base.duplex; 468 base2.cmd = cmd->base.cmd; 469 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords; 470 471 return !memcmp(&base2, &cmd->base, sizeof(base2)) && 472 bitmap_empty(cmd->link_modes.supported, 473 __ETHTOOL_LINK_MODE_MASK_NBITS) && 474 bitmap_empty(cmd->link_modes.lp_advertising, 475 __ETHTOOL_LINK_MODE_MASK_NBITS); 476 } 477 478 /* convert a kernel internal ethtool_link_ksettings to 479 * ethtool_link_usettings in user space. return 0 on success, errno on 480 * error. 481 */ 482 static int 483 store_link_ksettings_for_user(void __user *to, 484 const struct ethtool_link_ksettings *from) 485 { 486 struct ethtool_link_usettings link_usettings; 487 488 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings)); 489 bitmap_to_arr32(link_usettings.link_modes.supported, 490 from->link_modes.supported, 491 __ETHTOOL_LINK_MODE_MASK_NBITS); 492 bitmap_to_arr32(link_usettings.link_modes.advertising, 493 from->link_modes.advertising, 494 __ETHTOOL_LINK_MODE_MASK_NBITS); 495 bitmap_to_arr32(link_usettings.link_modes.lp_advertising, 496 from->link_modes.lp_advertising, 497 __ETHTOOL_LINK_MODE_MASK_NBITS); 498 499 if (copy_to_user(to, &link_usettings, sizeof(link_usettings))) 500 return -EFAULT; 501 502 return 0; 503 } 504 505 /* Query device for its ethtool_link_settings. */ 506 static int ethtool_get_link_ksettings(struct net_device *dev, 507 void __user *useraddr) 508 { 509 int err = 0; 510 struct ethtool_link_ksettings link_ksettings; 511 512 ASSERT_RTNL(); 513 if (!dev->ethtool_ops->get_link_ksettings) 514 return -EOPNOTSUPP; 515 516 /* handle bitmap nbits handshake */ 517 if (copy_from_user(&link_ksettings.base, useraddr, 518 sizeof(link_ksettings.base))) 519 return -EFAULT; 520 521 if (__ETHTOOL_LINK_MODE_MASK_NU32 522 != link_ksettings.base.link_mode_masks_nwords) { 523 /* wrong link mode nbits requested */ 524 memset(&link_ksettings, 0, sizeof(link_ksettings)); 525 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 526 /* send back number of words required as negative val */ 527 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX, 528 "need too many bits for link modes!"); 529 link_ksettings.base.link_mode_masks_nwords 530 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32); 531 532 /* copy the base fields back to user, not the link 533 * mode bitmaps 534 */ 535 if (copy_to_user(useraddr, &link_ksettings.base, 536 sizeof(link_ksettings.base))) 537 return -EFAULT; 538 539 return 0; 540 } 541 542 /* handshake successful: user/kernel agree on 543 * link_mode_masks_nwords 544 */ 545 546 memset(&link_ksettings, 0, sizeof(link_ksettings)); 547 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 548 if (err < 0) 549 return err; 550 551 /* make sure we tell the right values to user */ 552 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 553 link_ksettings.base.link_mode_masks_nwords 554 = __ETHTOOL_LINK_MODE_MASK_NU32; 555 556 return store_link_ksettings_for_user(useraddr, &link_ksettings); 557 } 558 559 /* Update device ethtool_link_settings. */ 560 static int ethtool_set_link_ksettings(struct net_device *dev, 561 void __user *useraddr) 562 { 563 int err; 564 struct ethtool_link_ksettings link_ksettings; 565 566 ASSERT_RTNL(); 567 568 if (!dev->ethtool_ops->set_link_ksettings) 569 return -EOPNOTSUPP; 570 571 /* make sure nbits field has expected value */ 572 if (copy_from_user(&link_ksettings.base, useraddr, 573 sizeof(link_ksettings.base))) 574 return -EFAULT; 575 576 if (__ETHTOOL_LINK_MODE_MASK_NU32 577 != link_ksettings.base.link_mode_masks_nwords) 578 return -EINVAL; 579 580 /* copy the whole structure, now that we know it has expected 581 * format 582 */ 583 err = load_link_ksettings_from_user(&link_ksettings, useraddr); 584 if (err) 585 return err; 586 587 /* re-check nwords field, just in case */ 588 if (__ETHTOOL_LINK_MODE_MASK_NU32 589 != link_ksettings.base.link_mode_masks_nwords) 590 return -EINVAL; 591 592 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 593 if (err >= 0) { 594 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 595 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 596 } 597 return err; 598 } 599 600 int ethtool_virtdev_set_link_ksettings(struct net_device *dev, 601 const struct ethtool_link_ksettings *cmd, 602 u32 *dev_speed, u8 *dev_duplex) 603 { 604 u32 speed; 605 u8 duplex; 606 607 speed = cmd->base.speed; 608 duplex = cmd->base.duplex; 609 /* don't allow custom speed and duplex */ 610 if (!ethtool_validate_speed(speed) || 611 !ethtool_validate_duplex(duplex) || 612 !ethtool_virtdev_validate_cmd(cmd)) 613 return -EINVAL; 614 *dev_speed = speed; 615 *dev_duplex = duplex; 616 617 return 0; 618 } 619 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings); 620 621 /* Query device for its ethtool_cmd settings. 622 * 623 * Backward compatibility note: for compatibility with legacy ethtool, this is 624 * now implemented via get_link_ksettings. When driver reports higher link mode 625 * bits, a kernel warning is logged once (with name of 1st driver/device) to 626 * recommend user to upgrade ethtool, but the command is successful (only the 627 * lower link mode bits reported back to user). Deprecated fields from 628 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero. 629 */ 630 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) 631 { 632 struct ethtool_link_ksettings link_ksettings; 633 struct ethtool_cmd cmd; 634 int err; 635 636 ASSERT_RTNL(); 637 if (!dev->ethtool_ops->get_link_ksettings) 638 return -EOPNOTSUPP; 639 640 memset(&link_ksettings, 0, sizeof(link_ksettings)); 641 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 642 if (err < 0) 643 return err; 644 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings); 645 646 /* send a sensible cmd tag back to user */ 647 cmd.cmd = ETHTOOL_GSET; 648 649 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 650 return -EFAULT; 651 652 return 0; 653 } 654 655 /* Update device link settings with given ethtool_cmd. 656 * 657 * Backward compatibility note: for compatibility with legacy ethtool, this is 658 * now always implemented via set_link_settings. When user's request updates 659 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel 660 * warning is logged once (with name of 1st driver/device) to recommend user to 661 * upgrade ethtool, and the request is rejected. 662 */ 663 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) 664 { 665 struct ethtool_link_ksettings link_ksettings; 666 struct ethtool_cmd cmd; 667 int ret; 668 669 ASSERT_RTNL(); 670 671 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 672 return -EFAULT; 673 if (!dev->ethtool_ops->set_link_ksettings) 674 return -EOPNOTSUPP; 675 676 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd)) 677 return -EINVAL; 678 link_ksettings.base.link_mode_masks_nwords = 679 __ETHTOOL_LINK_MODE_MASK_NU32; 680 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 681 if (ret >= 0) { 682 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 683 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 684 } 685 return ret; 686 } 687 688 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev, 689 void __user *useraddr) 690 { 691 struct ethtool_drvinfo info; 692 const struct ethtool_ops *ops = dev->ethtool_ops; 693 694 memset(&info, 0, sizeof(info)); 695 info.cmd = ETHTOOL_GDRVINFO; 696 strlcpy(info.version, UTS_RELEASE, sizeof(info.version)); 697 if (ops->get_drvinfo) { 698 ops->get_drvinfo(dev, &info); 699 } else if (dev->dev.parent && dev->dev.parent->driver) { 700 strlcpy(info.bus_info, dev_name(dev->dev.parent), 701 sizeof(info.bus_info)); 702 strlcpy(info.driver, dev->dev.parent->driver->name, 703 sizeof(info.driver)); 704 } else { 705 return -EOPNOTSUPP; 706 } 707 708 /* 709 * this method of obtaining string set info is deprecated; 710 * Use ETHTOOL_GSSET_INFO instead. 711 */ 712 if (ops->get_sset_count) { 713 int rc; 714 715 rc = ops->get_sset_count(dev, ETH_SS_TEST); 716 if (rc >= 0) 717 info.testinfo_len = rc; 718 rc = ops->get_sset_count(dev, ETH_SS_STATS); 719 if (rc >= 0) 720 info.n_stats = rc; 721 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); 722 if (rc >= 0) 723 info.n_priv_flags = rc; 724 } 725 if (ops->get_regs_len) { 726 int ret = ops->get_regs_len(dev); 727 728 if (ret > 0) 729 info.regdump_len = ret; 730 } 731 732 if (ops->get_eeprom_len) 733 info.eedump_len = ops->get_eeprom_len(dev); 734 735 if (!info.fw_version[0]) 736 devlink_compat_running_version(dev, info.fw_version, 737 sizeof(info.fw_version)); 738 739 if (copy_to_user(useraddr, &info, sizeof(info))) 740 return -EFAULT; 741 return 0; 742 } 743 744 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, 745 void __user *useraddr) 746 { 747 struct ethtool_sset_info info; 748 u64 sset_mask; 749 int i, idx = 0, n_bits = 0, ret, rc; 750 u32 *info_buf = NULL; 751 752 if (copy_from_user(&info, useraddr, sizeof(info))) 753 return -EFAULT; 754 755 /* store copy of mask, because we zero struct later on */ 756 sset_mask = info.sset_mask; 757 if (!sset_mask) 758 return 0; 759 760 /* calculate size of return buffer */ 761 n_bits = hweight64(sset_mask); 762 763 memset(&info, 0, sizeof(info)); 764 info.cmd = ETHTOOL_GSSET_INFO; 765 766 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER); 767 if (!info_buf) 768 return -ENOMEM; 769 770 /* 771 * fill return buffer based on input bitmask and successful 772 * get_sset_count return 773 */ 774 for (i = 0; i < 64; i++) { 775 if (!(sset_mask & (1ULL << i))) 776 continue; 777 778 rc = __ethtool_get_sset_count(dev, i); 779 if (rc >= 0) { 780 info.sset_mask |= (1ULL << i); 781 info_buf[idx++] = rc; 782 } 783 } 784 785 ret = -EFAULT; 786 if (copy_to_user(useraddr, &info, sizeof(info))) 787 goto out; 788 789 useraddr += offsetof(struct ethtool_sset_info, data); 790 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32))) 791 goto out; 792 793 ret = 0; 794 795 out: 796 kfree(info_buf); 797 return ret; 798 } 799 800 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, 801 u32 cmd, void __user *useraddr) 802 { 803 struct ethtool_rxnfc info; 804 size_t info_size = sizeof(info); 805 int rc; 806 807 if (!dev->ethtool_ops->set_rxnfc) 808 return -EOPNOTSUPP; 809 810 /* struct ethtool_rxnfc was originally defined for 811 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 812 * members. User-space might still be using that 813 * definition. */ 814 if (cmd == ETHTOOL_SRXFH) 815 info_size = (offsetof(struct ethtool_rxnfc, data) + 816 sizeof(info.data)); 817 818 if (copy_from_user(&info, useraddr, info_size)) 819 return -EFAULT; 820 821 rc = dev->ethtool_ops->set_rxnfc(dev, &info); 822 if (rc) 823 return rc; 824 825 if (cmd == ETHTOOL_SRXCLSRLINS && 826 copy_to_user(useraddr, &info, info_size)) 827 return -EFAULT; 828 829 return 0; 830 } 831 832 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 833 u32 cmd, void __user *useraddr) 834 { 835 struct ethtool_rxnfc info; 836 size_t info_size = sizeof(info); 837 const struct ethtool_ops *ops = dev->ethtool_ops; 838 int ret; 839 void *rule_buf = NULL; 840 841 if (!ops->get_rxnfc) 842 return -EOPNOTSUPP; 843 844 /* struct ethtool_rxnfc was originally defined for 845 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 846 * members. User-space might still be using that 847 * definition. */ 848 if (cmd == ETHTOOL_GRXFH) 849 info_size = (offsetof(struct ethtool_rxnfc, data) + 850 sizeof(info.data)); 851 852 if (copy_from_user(&info, useraddr, info_size)) 853 return -EFAULT; 854 855 /* If FLOW_RSS was requested then user-space must be using the 856 * new definition, as FLOW_RSS is newer. 857 */ 858 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) { 859 info_size = sizeof(info); 860 if (copy_from_user(&info, useraddr, info_size)) 861 return -EFAULT; 862 /* Since malicious users may modify the original data, 863 * we need to check whether FLOW_RSS is still requested. 864 */ 865 if (!(info.flow_type & FLOW_RSS)) 866 return -EINVAL; 867 } 868 869 if (info.cmd != cmd) 870 return -EINVAL; 871 872 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 873 if (info.rule_cnt > 0) { 874 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 875 rule_buf = kcalloc(info.rule_cnt, sizeof(u32), 876 GFP_USER); 877 if (!rule_buf) 878 return -ENOMEM; 879 } 880 } 881 882 ret = ops->get_rxnfc(dev, &info, rule_buf); 883 if (ret < 0) 884 goto err_out; 885 886 ret = -EFAULT; 887 if (copy_to_user(useraddr, &info, info_size)) 888 goto err_out; 889 890 if (rule_buf) { 891 useraddr += offsetof(struct ethtool_rxnfc, rule_locs); 892 if (copy_to_user(useraddr, rule_buf, 893 info.rule_cnt * sizeof(u32))) 894 goto err_out; 895 } 896 ret = 0; 897 898 err_out: 899 kfree(rule_buf); 900 901 return ret; 902 } 903 904 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 905 struct ethtool_rxnfc *rx_rings, 906 u32 size) 907 { 908 int i; 909 910 if (copy_from_user(indir, useraddr, size * sizeof(indir[0]))) 911 return -EFAULT; 912 913 /* Validate ring indices */ 914 for (i = 0; i < size; i++) 915 if (indir[i] >= rx_rings->data) 916 return -EINVAL; 917 918 return 0; 919 } 920 921 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; 922 923 void netdev_rss_key_fill(void *buffer, size_t len) 924 { 925 BUG_ON(len > sizeof(netdev_rss_key)); 926 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 927 memcpy(buffer, netdev_rss_key, len); 928 } 929 EXPORT_SYMBOL(netdev_rss_key_fill); 930 931 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 932 void __user *useraddr) 933 { 934 u32 user_size, dev_size; 935 u32 *indir; 936 int ret; 937 938 if (!dev->ethtool_ops->get_rxfh_indir_size || 939 !dev->ethtool_ops->get_rxfh) 940 return -EOPNOTSUPP; 941 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 942 if (dev_size == 0) 943 return -EOPNOTSUPP; 944 945 if (copy_from_user(&user_size, 946 useraddr + offsetof(struct ethtool_rxfh_indir, size), 947 sizeof(user_size))) 948 return -EFAULT; 949 950 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 951 &dev_size, sizeof(dev_size))) 952 return -EFAULT; 953 954 /* If the user buffer size is 0, this is just a query for the 955 * device table size. Otherwise, if it's smaller than the 956 * device table size it's an error. 957 */ 958 if (user_size < dev_size) 959 return user_size == 0 ? 0 : -EINVAL; 960 961 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 962 if (!indir) 963 return -ENOMEM; 964 965 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL); 966 if (ret) 967 goto out; 968 969 if (copy_to_user(useraddr + 970 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 971 indir, dev_size * sizeof(indir[0]))) 972 ret = -EFAULT; 973 974 out: 975 kfree(indir); 976 return ret; 977 } 978 979 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 980 void __user *useraddr) 981 { 982 struct ethtool_rxnfc rx_rings; 983 u32 user_size, dev_size, i; 984 u32 *indir; 985 const struct ethtool_ops *ops = dev->ethtool_ops; 986 int ret; 987 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 988 989 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 990 !ops->get_rxnfc) 991 return -EOPNOTSUPP; 992 993 dev_size = ops->get_rxfh_indir_size(dev); 994 if (dev_size == 0) 995 return -EOPNOTSUPP; 996 997 if (copy_from_user(&user_size, 998 useraddr + offsetof(struct ethtool_rxfh_indir, size), 999 sizeof(user_size))) 1000 return -EFAULT; 1001 1002 if (user_size != 0 && user_size != dev_size) 1003 return -EINVAL; 1004 1005 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 1006 if (!indir) 1007 return -ENOMEM; 1008 1009 rx_rings.cmd = ETHTOOL_GRXRINGS; 1010 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1011 if (ret) 1012 goto out; 1013 1014 if (user_size == 0) { 1015 for (i = 0; i < dev_size; i++) 1016 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1017 } else { 1018 ret = ethtool_copy_validate_indir(indir, 1019 useraddr + ringidx_offset, 1020 &rx_rings, 1021 dev_size); 1022 if (ret) 1023 goto out; 1024 } 1025 1026 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE); 1027 if (ret) 1028 goto out; 1029 1030 /* indicate whether rxfh was set to default */ 1031 if (user_size == 0) 1032 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1033 else 1034 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1035 1036 out: 1037 kfree(indir); 1038 return ret; 1039 } 1040 1041 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 1042 void __user *useraddr) 1043 { 1044 int ret; 1045 const struct ethtool_ops *ops = dev->ethtool_ops; 1046 u32 user_indir_size, user_key_size; 1047 u32 dev_indir_size = 0, dev_key_size = 0; 1048 struct ethtool_rxfh rxfh; 1049 u32 total_size; 1050 u32 indir_bytes; 1051 u32 *indir = NULL; 1052 u8 dev_hfunc = 0; 1053 u8 *hkey = NULL; 1054 u8 *rss_config; 1055 1056 if (!ops->get_rxfh) 1057 return -EOPNOTSUPP; 1058 1059 if (ops->get_rxfh_indir_size) 1060 dev_indir_size = ops->get_rxfh_indir_size(dev); 1061 if (ops->get_rxfh_key_size) 1062 dev_key_size = ops->get_rxfh_key_size(dev); 1063 1064 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1065 return -EFAULT; 1066 user_indir_size = rxfh.indir_size; 1067 user_key_size = rxfh.key_size; 1068 1069 /* Check that reserved fields are 0 for now */ 1070 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1071 return -EINVAL; 1072 /* Most drivers don't handle rss_context, check it's 0 as well */ 1073 if (rxfh.rss_context && !ops->get_rxfh_context) 1074 return -EOPNOTSUPP; 1075 1076 rxfh.indir_size = dev_indir_size; 1077 rxfh.key_size = dev_key_size; 1078 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1079 return -EFAULT; 1080 1081 if ((user_indir_size && (user_indir_size != dev_indir_size)) || 1082 (user_key_size && (user_key_size != dev_key_size))) 1083 return -EINVAL; 1084 1085 indir_bytes = user_indir_size * sizeof(indir[0]); 1086 total_size = indir_bytes + user_key_size; 1087 rss_config = kzalloc(total_size, GFP_USER); 1088 if (!rss_config) 1089 return -ENOMEM; 1090 1091 if (user_indir_size) 1092 indir = (u32 *)rss_config; 1093 1094 if (user_key_size) 1095 hkey = rss_config + indir_bytes; 1096 1097 if (rxfh.rss_context) 1098 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey, 1099 &dev_hfunc, 1100 rxfh.rss_context); 1101 else 1102 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc); 1103 if (ret) 1104 goto out; 1105 1106 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1107 &dev_hfunc, sizeof(rxfh.hfunc))) { 1108 ret = -EFAULT; 1109 } else if (copy_to_user(useraddr + 1110 offsetof(struct ethtool_rxfh, rss_config[0]), 1111 rss_config, total_size)) { 1112 ret = -EFAULT; 1113 } 1114 out: 1115 kfree(rss_config); 1116 1117 return ret; 1118 } 1119 1120 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1121 void __user *useraddr) 1122 { 1123 int ret; 1124 const struct ethtool_ops *ops = dev->ethtool_ops; 1125 struct ethtool_rxnfc rx_rings; 1126 struct ethtool_rxfh rxfh; 1127 u32 dev_indir_size = 0, dev_key_size = 0, i; 1128 u32 *indir = NULL, indir_bytes = 0; 1129 u8 *hkey = NULL; 1130 u8 *rss_config; 1131 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1132 bool delete = false; 1133 1134 if (!ops->get_rxnfc || !ops->set_rxfh) 1135 return -EOPNOTSUPP; 1136 1137 if (ops->get_rxfh_indir_size) 1138 dev_indir_size = ops->get_rxfh_indir_size(dev); 1139 if (ops->get_rxfh_key_size) 1140 dev_key_size = ops->get_rxfh_key_size(dev); 1141 1142 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1143 return -EFAULT; 1144 1145 /* Check that reserved fields are 0 for now */ 1146 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1147 return -EINVAL; 1148 /* Most drivers don't handle rss_context, check it's 0 as well */ 1149 if (rxfh.rss_context && !ops->set_rxfh_context) 1150 return -EOPNOTSUPP; 1151 1152 /* If either indir, hash key or function is valid, proceed further. 1153 * Must request at least one change: indir size, hash key or function. 1154 */ 1155 if ((rxfh.indir_size && 1156 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1157 rxfh.indir_size != dev_indir_size) || 1158 (rxfh.key_size && (rxfh.key_size != dev_key_size)) || 1159 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1160 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE)) 1161 return -EINVAL; 1162 1163 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1164 indir_bytes = dev_indir_size * sizeof(indir[0]); 1165 1166 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER); 1167 if (!rss_config) 1168 return -ENOMEM; 1169 1170 rx_rings.cmd = ETHTOOL_GRXRINGS; 1171 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1172 if (ret) 1173 goto out; 1174 1175 /* rxfh.indir_size == 0 means reset the indir table to default (master 1176 * context) or delete the context (other RSS contexts). 1177 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1178 */ 1179 if (rxfh.indir_size && 1180 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1181 indir = (u32 *)rss_config; 1182 ret = ethtool_copy_validate_indir(indir, 1183 useraddr + rss_cfg_offset, 1184 &rx_rings, 1185 rxfh.indir_size); 1186 if (ret) 1187 goto out; 1188 } else if (rxfh.indir_size == 0) { 1189 if (rxfh.rss_context == 0) { 1190 indir = (u32 *)rss_config; 1191 for (i = 0; i < dev_indir_size; i++) 1192 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1193 } else { 1194 delete = true; 1195 } 1196 } 1197 1198 if (rxfh.key_size) { 1199 hkey = rss_config + indir_bytes; 1200 if (copy_from_user(hkey, 1201 useraddr + rss_cfg_offset + indir_bytes, 1202 rxfh.key_size)) { 1203 ret = -EFAULT; 1204 goto out; 1205 } 1206 } 1207 1208 if (rxfh.rss_context) 1209 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc, 1210 &rxfh.rss_context, delete); 1211 else 1212 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc); 1213 if (ret) 1214 goto out; 1215 1216 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1217 &rxfh.rss_context, sizeof(rxfh.rss_context))) 1218 ret = -EFAULT; 1219 1220 if (!rxfh.rss_context) { 1221 /* indicate whether rxfh was set to default */ 1222 if (rxfh.indir_size == 0) 1223 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1224 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1225 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1226 } 1227 1228 out: 1229 kfree(rss_config); 1230 return ret; 1231 } 1232 1233 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1234 { 1235 struct ethtool_regs regs; 1236 const struct ethtool_ops *ops = dev->ethtool_ops; 1237 void *regbuf; 1238 int reglen, ret; 1239 1240 if (!ops->get_regs || !ops->get_regs_len) 1241 return -EOPNOTSUPP; 1242 1243 if (copy_from_user(®s, useraddr, sizeof(regs))) 1244 return -EFAULT; 1245 1246 reglen = ops->get_regs_len(dev); 1247 if (reglen <= 0) 1248 return reglen; 1249 1250 if (regs.len > reglen) 1251 regs.len = reglen; 1252 1253 regbuf = vzalloc(reglen); 1254 if (!regbuf) 1255 return -ENOMEM; 1256 1257 if (regs.len < reglen) 1258 reglen = regs.len; 1259 1260 ops->get_regs(dev, ®s, regbuf); 1261 1262 ret = -EFAULT; 1263 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1264 goto out; 1265 useraddr += offsetof(struct ethtool_regs, data); 1266 if (copy_to_user(useraddr, regbuf, reglen)) 1267 goto out; 1268 ret = 0; 1269 1270 out: 1271 vfree(regbuf); 1272 return ret; 1273 } 1274 1275 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1276 { 1277 struct ethtool_value reset; 1278 int ret; 1279 1280 if (!dev->ethtool_ops->reset) 1281 return -EOPNOTSUPP; 1282 1283 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1284 return -EFAULT; 1285 1286 ret = dev->ethtool_ops->reset(dev, &reset.data); 1287 if (ret) 1288 return ret; 1289 1290 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1291 return -EFAULT; 1292 return 0; 1293 } 1294 1295 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1296 { 1297 struct ethtool_wolinfo wol; 1298 1299 if (!dev->ethtool_ops->get_wol) 1300 return -EOPNOTSUPP; 1301 1302 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1303 wol.cmd = ETHTOOL_GWOL; 1304 dev->ethtool_ops->get_wol(dev, &wol); 1305 1306 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1307 return -EFAULT; 1308 return 0; 1309 } 1310 1311 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1312 { 1313 struct ethtool_wolinfo wol; 1314 int ret; 1315 1316 if (!dev->ethtool_ops->set_wol) 1317 return -EOPNOTSUPP; 1318 1319 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1320 return -EFAULT; 1321 1322 ret = dev->ethtool_ops->set_wol(dev, &wol); 1323 if (ret) 1324 return ret; 1325 1326 dev->wol_enabled = !!wol.wolopts; 1327 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 1328 1329 return 0; 1330 } 1331 1332 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1333 { 1334 struct ethtool_eee edata; 1335 int rc; 1336 1337 if (!dev->ethtool_ops->get_eee) 1338 return -EOPNOTSUPP; 1339 1340 memset(&edata, 0, sizeof(struct ethtool_eee)); 1341 edata.cmd = ETHTOOL_GEEE; 1342 rc = dev->ethtool_ops->get_eee(dev, &edata); 1343 1344 if (rc) 1345 return rc; 1346 1347 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1348 return -EFAULT; 1349 1350 return 0; 1351 } 1352 1353 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1354 { 1355 struct ethtool_eee edata; 1356 int ret; 1357 1358 if (!dev->ethtool_ops->set_eee) 1359 return -EOPNOTSUPP; 1360 1361 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1362 return -EFAULT; 1363 1364 ret = dev->ethtool_ops->set_eee(dev, &edata); 1365 if (!ret) 1366 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL); 1367 return ret; 1368 } 1369 1370 static int ethtool_nway_reset(struct net_device *dev) 1371 { 1372 if (!dev->ethtool_ops->nway_reset) 1373 return -EOPNOTSUPP; 1374 1375 return dev->ethtool_ops->nway_reset(dev); 1376 } 1377 1378 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1379 { 1380 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1381 int link = __ethtool_get_link(dev); 1382 1383 if (link < 0) 1384 return link; 1385 1386 edata.data = link; 1387 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1388 return -EFAULT; 1389 return 0; 1390 } 1391 1392 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1393 int (*getter)(struct net_device *, 1394 struct ethtool_eeprom *, u8 *), 1395 u32 total_len) 1396 { 1397 struct ethtool_eeprom eeprom; 1398 void __user *userbuf = useraddr + sizeof(eeprom); 1399 u32 bytes_remaining; 1400 u8 *data; 1401 int ret = 0; 1402 1403 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1404 return -EFAULT; 1405 1406 /* Check for wrap and zero */ 1407 if (eeprom.offset + eeprom.len <= eeprom.offset) 1408 return -EINVAL; 1409 1410 /* Check for exceeding total eeprom len */ 1411 if (eeprom.offset + eeprom.len > total_len) 1412 return -EINVAL; 1413 1414 data = kmalloc(PAGE_SIZE, GFP_USER); 1415 if (!data) 1416 return -ENOMEM; 1417 1418 bytes_remaining = eeprom.len; 1419 while (bytes_remaining > 0) { 1420 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1421 1422 ret = getter(dev, &eeprom, data); 1423 if (ret) 1424 break; 1425 if (copy_to_user(userbuf, data, eeprom.len)) { 1426 ret = -EFAULT; 1427 break; 1428 } 1429 userbuf += eeprom.len; 1430 eeprom.offset += eeprom.len; 1431 bytes_remaining -= eeprom.len; 1432 } 1433 1434 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1435 eeprom.offset -= eeprom.len; 1436 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1437 ret = -EFAULT; 1438 1439 kfree(data); 1440 return ret; 1441 } 1442 1443 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1444 { 1445 const struct ethtool_ops *ops = dev->ethtool_ops; 1446 1447 if (!ops->get_eeprom || !ops->get_eeprom_len || 1448 !ops->get_eeprom_len(dev)) 1449 return -EOPNOTSUPP; 1450 1451 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1452 ops->get_eeprom_len(dev)); 1453 } 1454 1455 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1456 { 1457 struct ethtool_eeprom eeprom; 1458 const struct ethtool_ops *ops = dev->ethtool_ops; 1459 void __user *userbuf = useraddr + sizeof(eeprom); 1460 u32 bytes_remaining; 1461 u8 *data; 1462 int ret = 0; 1463 1464 if (!ops->set_eeprom || !ops->get_eeprom_len || 1465 !ops->get_eeprom_len(dev)) 1466 return -EOPNOTSUPP; 1467 1468 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1469 return -EFAULT; 1470 1471 /* Check for wrap and zero */ 1472 if (eeprom.offset + eeprom.len <= eeprom.offset) 1473 return -EINVAL; 1474 1475 /* Check for exceeding total eeprom len */ 1476 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1477 return -EINVAL; 1478 1479 data = kmalloc(PAGE_SIZE, GFP_USER); 1480 if (!data) 1481 return -ENOMEM; 1482 1483 bytes_remaining = eeprom.len; 1484 while (bytes_remaining > 0) { 1485 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1486 1487 if (copy_from_user(data, userbuf, eeprom.len)) { 1488 ret = -EFAULT; 1489 break; 1490 } 1491 ret = ops->set_eeprom(dev, &eeprom, data); 1492 if (ret) 1493 break; 1494 userbuf += eeprom.len; 1495 eeprom.offset += eeprom.len; 1496 bytes_remaining -= eeprom.len; 1497 } 1498 1499 kfree(data); 1500 return ret; 1501 } 1502 1503 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1504 void __user *useraddr) 1505 { 1506 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1507 1508 if (!dev->ethtool_ops->get_coalesce) 1509 return -EOPNOTSUPP; 1510 1511 dev->ethtool_ops->get_coalesce(dev, &coalesce); 1512 1513 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1514 return -EFAULT; 1515 return 0; 1516 } 1517 1518 static bool 1519 ethtool_set_coalesce_supported(struct net_device *dev, 1520 struct ethtool_coalesce *coalesce) 1521 { 1522 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1523 u32 nonzero_params = 0; 1524 1525 if (coalesce->rx_coalesce_usecs) 1526 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1527 if (coalesce->rx_max_coalesced_frames) 1528 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1529 if (coalesce->rx_coalesce_usecs_irq) 1530 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1531 if (coalesce->rx_max_coalesced_frames_irq) 1532 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1533 if (coalesce->tx_coalesce_usecs) 1534 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1535 if (coalesce->tx_max_coalesced_frames) 1536 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1537 if (coalesce->tx_coalesce_usecs_irq) 1538 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1539 if (coalesce->tx_max_coalesced_frames_irq) 1540 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1541 if (coalesce->stats_block_coalesce_usecs) 1542 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1543 if (coalesce->use_adaptive_rx_coalesce) 1544 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1545 if (coalesce->use_adaptive_tx_coalesce) 1546 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1547 if (coalesce->pkt_rate_low) 1548 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1549 if (coalesce->rx_coalesce_usecs_low) 1550 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1551 if (coalesce->rx_max_coalesced_frames_low) 1552 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1553 if (coalesce->tx_coalesce_usecs_low) 1554 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1555 if (coalesce->tx_max_coalesced_frames_low) 1556 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1557 if (coalesce->pkt_rate_high) 1558 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1559 if (coalesce->rx_coalesce_usecs_high) 1560 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1561 if (coalesce->rx_max_coalesced_frames_high) 1562 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1563 if (coalesce->tx_coalesce_usecs_high) 1564 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1565 if (coalesce->tx_max_coalesced_frames_high) 1566 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1567 if (coalesce->rate_sample_interval) 1568 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1569 1570 return (supported_params & nonzero_params) == nonzero_params; 1571 } 1572 1573 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1574 void __user *useraddr) 1575 { 1576 struct ethtool_coalesce coalesce; 1577 int ret; 1578 1579 if (!dev->ethtool_ops->set_coalesce) 1580 return -EOPNOTSUPP; 1581 1582 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1583 return -EFAULT; 1584 1585 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 1586 return -EOPNOTSUPP; 1587 1588 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce); 1589 if (!ret) 1590 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); 1591 return ret; 1592 } 1593 1594 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1595 { 1596 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1597 1598 if (!dev->ethtool_ops->get_ringparam) 1599 return -EOPNOTSUPP; 1600 1601 dev->ethtool_ops->get_ringparam(dev, &ringparam); 1602 1603 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1604 return -EFAULT; 1605 return 0; 1606 } 1607 1608 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1609 { 1610 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 1611 int ret; 1612 1613 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 1614 return -EOPNOTSUPP; 1615 1616 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1617 return -EFAULT; 1618 1619 dev->ethtool_ops->get_ringparam(dev, &max); 1620 1621 /* ensure new ring parameters are within the maximums */ 1622 if (ringparam.rx_pending > max.rx_max_pending || 1623 ringparam.rx_mini_pending > max.rx_mini_max_pending || 1624 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 1625 ringparam.tx_pending > max.tx_max_pending) 1626 return -EINVAL; 1627 1628 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam); 1629 if (!ret) 1630 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 1631 return ret; 1632 } 1633 1634 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1635 void __user *useraddr) 1636 { 1637 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1638 1639 if (!dev->ethtool_ops->get_channels) 1640 return -EOPNOTSUPP; 1641 1642 dev->ethtool_ops->get_channels(dev, &channels); 1643 1644 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1645 return -EFAULT; 1646 return 0; 1647 } 1648 1649 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1650 void __user *useraddr) 1651 { 1652 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 1653 u16 from_channel, to_channel; 1654 u32 max_rx_in_use = 0; 1655 unsigned int i; 1656 int ret; 1657 1658 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 1659 return -EOPNOTSUPP; 1660 1661 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1662 return -EFAULT; 1663 1664 dev->ethtool_ops->get_channels(dev, &curr); 1665 1666 /* ensure new counts are within the maximums */ 1667 if (channels.rx_count > curr.max_rx || 1668 channels.tx_count > curr.max_tx || 1669 channels.combined_count > curr.max_combined || 1670 channels.other_count > curr.max_other) 1671 return -EINVAL; 1672 1673 /* ensure the new Rx count fits within the configured Rx flow 1674 * indirection table settings */ 1675 if (netif_is_rxfh_configured(dev) && 1676 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) && 1677 (channels.combined_count + channels.rx_count) <= max_rx_in_use) 1678 return -EINVAL; 1679 1680 /* Disabling channels, query zero-copy AF_XDP sockets */ 1681 from_channel = channels.combined_count + 1682 min(channels.rx_count, channels.tx_count); 1683 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 1684 for (i = from_channel; i < to_channel; i++) 1685 if (xdp_get_umem_from_qid(dev, i)) 1686 return -EINVAL; 1687 1688 ret = dev->ethtool_ops->set_channels(dev, &channels); 1689 if (!ret) 1690 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 1691 return ret; 1692 } 1693 1694 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1695 { 1696 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 1697 1698 if (!dev->ethtool_ops->get_pauseparam) 1699 return -EOPNOTSUPP; 1700 1701 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1702 1703 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1704 return -EFAULT; 1705 return 0; 1706 } 1707 1708 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1709 { 1710 struct ethtool_pauseparam pauseparam; 1711 int ret; 1712 1713 if (!dev->ethtool_ops->set_pauseparam) 1714 return -EOPNOTSUPP; 1715 1716 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1717 return -EFAULT; 1718 1719 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1720 if (!ret) 1721 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); 1722 return ret; 1723 } 1724 1725 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1726 { 1727 struct ethtool_test test; 1728 const struct ethtool_ops *ops = dev->ethtool_ops; 1729 u64 *data; 1730 int ret, test_len; 1731 1732 if (!ops->self_test || !ops->get_sset_count) 1733 return -EOPNOTSUPP; 1734 1735 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1736 if (test_len < 0) 1737 return test_len; 1738 WARN_ON(test_len == 0); 1739 1740 if (copy_from_user(&test, useraddr, sizeof(test))) 1741 return -EFAULT; 1742 1743 test.len = test_len; 1744 data = kmalloc_array(test_len, sizeof(u64), GFP_USER); 1745 if (!data) 1746 return -ENOMEM; 1747 1748 netif_testing_on(dev); 1749 ops->self_test(dev, &test, data); 1750 netif_testing_off(dev); 1751 1752 ret = -EFAULT; 1753 if (copy_to_user(useraddr, &test, sizeof(test))) 1754 goto out; 1755 useraddr += sizeof(test); 1756 if (copy_to_user(useraddr, data, test.len * sizeof(u64))) 1757 goto out; 1758 ret = 0; 1759 1760 out: 1761 kfree(data); 1762 return ret; 1763 } 1764 1765 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1766 { 1767 struct ethtool_gstrings gstrings; 1768 u8 *data; 1769 int ret; 1770 1771 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1772 return -EFAULT; 1773 1774 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1775 if (ret < 0) 1776 return ret; 1777 if (ret > S32_MAX / ETH_GSTRING_LEN) 1778 return -ENOMEM; 1779 WARN_ON_ONCE(!ret); 1780 1781 gstrings.len = ret; 1782 1783 if (gstrings.len) { 1784 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 1785 if (!data) 1786 return -ENOMEM; 1787 1788 __ethtool_get_strings(dev, gstrings.string_set, data); 1789 } else { 1790 data = NULL; 1791 } 1792 1793 ret = -EFAULT; 1794 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1795 goto out; 1796 useraddr += sizeof(gstrings); 1797 if (gstrings.len && 1798 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) 1799 goto out; 1800 ret = 0; 1801 1802 out: 1803 vfree(data); 1804 return ret; 1805 } 1806 1807 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 1808 { 1809 struct ethtool_value id; 1810 static bool busy; 1811 const struct ethtool_ops *ops = dev->ethtool_ops; 1812 int rc; 1813 1814 if (!ops->set_phys_id) 1815 return -EOPNOTSUPP; 1816 1817 if (busy) 1818 return -EBUSY; 1819 1820 if (copy_from_user(&id, useraddr, sizeof(id))) 1821 return -EFAULT; 1822 1823 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 1824 if (rc < 0) 1825 return rc; 1826 1827 /* Drop the RTNL lock while waiting, but prevent reentry or 1828 * removal of the device. 1829 */ 1830 busy = true; 1831 dev_hold(dev); 1832 rtnl_unlock(); 1833 1834 if (rc == 0) { 1835 /* Driver will handle this itself */ 1836 schedule_timeout_interruptible( 1837 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 1838 } else { 1839 /* Driver expects to be called at twice the frequency in rc */ 1840 int n = rc * 2, i, interval = HZ / n; 1841 1842 /* Count down seconds */ 1843 do { 1844 /* Count down iterations per second */ 1845 i = n; 1846 do { 1847 rtnl_lock(); 1848 rc = ops->set_phys_id(dev, 1849 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 1850 rtnl_unlock(); 1851 if (rc) 1852 break; 1853 schedule_timeout_interruptible(interval); 1854 } while (!signal_pending(current) && --i != 0); 1855 } while (!signal_pending(current) && 1856 (id.data == 0 || --id.data != 0)); 1857 } 1858 1859 rtnl_lock(); 1860 dev_put(dev); 1861 busy = false; 1862 1863 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 1864 return rc; 1865 } 1866 1867 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 1868 { 1869 struct ethtool_stats stats; 1870 const struct ethtool_ops *ops = dev->ethtool_ops; 1871 u64 *data; 1872 int ret, n_stats; 1873 1874 if (!ops->get_ethtool_stats || !ops->get_sset_count) 1875 return -EOPNOTSUPP; 1876 1877 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 1878 if (n_stats < 0) 1879 return n_stats; 1880 if (n_stats > S32_MAX / sizeof(u64)) 1881 return -ENOMEM; 1882 WARN_ON_ONCE(!n_stats); 1883 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1884 return -EFAULT; 1885 1886 stats.n_stats = n_stats; 1887 1888 if (n_stats) { 1889 data = vzalloc(array_size(n_stats, sizeof(u64))); 1890 if (!data) 1891 return -ENOMEM; 1892 ops->get_ethtool_stats(dev, &stats, data); 1893 } else { 1894 data = NULL; 1895 } 1896 1897 ret = -EFAULT; 1898 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1899 goto out; 1900 useraddr += sizeof(stats); 1901 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1902 goto out; 1903 ret = 0; 1904 1905 out: 1906 vfree(data); 1907 return ret; 1908 } 1909 1910 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 1911 { 1912 const struct ethtool_ops *ops = dev->ethtool_ops; 1913 struct phy_device *phydev = dev->phydev; 1914 struct ethtool_stats stats; 1915 u64 *data; 1916 int ret, n_stats; 1917 1918 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count)) 1919 return -EOPNOTSUPP; 1920 1921 if (dev->phydev && !ops->get_ethtool_phy_stats) 1922 n_stats = phy_ethtool_get_sset_count(dev->phydev); 1923 else 1924 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 1925 if (n_stats < 0) 1926 return n_stats; 1927 if (n_stats > S32_MAX / sizeof(u64)) 1928 return -ENOMEM; 1929 WARN_ON_ONCE(!n_stats); 1930 1931 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1932 return -EFAULT; 1933 1934 stats.n_stats = n_stats; 1935 1936 if (n_stats) { 1937 data = vzalloc(array_size(n_stats, sizeof(u64))); 1938 if (!data) 1939 return -ENOMEM; 1940 1941 if (dev->phydev && !ops->get_ethtool_phy_stats) { 1942 ret = phy_ethtool_get_stats(dev->phydev, &stats, data); 1943 if (ret < 0) 1944 goto out; 1945 } else { 1946 ops->get_ethtool_phy_stats(dev, &stats, data); 1947 } 1948 } else { 1949 data = NULL; 1950 } 1951 1952 ret = -EFAULT; 1953 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1954 goto out; 1955 useraddr += sizeof(stats); 1956 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1957 goto out; 1958 ret = 0; 1959 1960 out: 1961 vfree(data); 1962 return ret; 1963 } 1964 1965 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 1966 { 1967 struct ethtool_perm_addr epaddr; 1968 1969 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 1970 return -EFAULT; 1971 1972 if (epaddr.size < dev->addr_len) 1973 return -ETOOSMALL; 1974 epaddr.size = dev->addr_len; 1975 1976 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 1977 return -EFAULT; 1978 useraddr += sizeof(epaddr); 1979 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 1980 return -EFAULT; 1981 return 0; 1982 } 1983 1984 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 1985 u32 cmd, u32 (*actor)(struct net_device *)) 1986 { 1987 struct ethtool_value edata = { .cmd = cmd }; 1988 1989 if (!actor) 1990 return -EOPNOTSUPP; 1991 1992 edata.data = actor(dev); 1993 1994 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1995 return -EFAULT; 1996 return 0; 1997 } 1998 1999 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 2000 void (*actor)(struct net_device *, u32)) 2001 { 2002 struct ethtool_value edata; 2003 2004 if (!actor) 2005 return -EOPNOTSUPP; 2006 2007 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2008 return -EFAULT; 2009 2010 actor(dev, edata.data); 2011 return 0; 2012 } 2013 2014 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2015 int (*actor)(struct net_device *, u32)) 2016 { 2017 struct ethtool_value edata; 2018 2019 if (!actor) 2020 return -EOPNOTSUPP; 2021 2022 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2023 return -EFAULT; 2024 2025 return actor(dev, edata.data); 2026 } 2027 2028 static noinline_for_stack int ethtool_flash_device(struct net_device *dev, 2029 char __user *useraddr) 2030 { 2031 struct ethtool_flash efl; 2032 2033 if (copy_from_user(&efl, useraddr, sizeof(efl))) 2034 return -EFAULT; 2035 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 2036 2037 if (!dev->ethtool_ops->flash_device) 2038 return devlink_compat_flash_update(dev, efl.data); 2039 2040 return dev->ethtool_ops->flash_device(dev, &efl); 2041 } 2042 2043 static int ethtool_set_dump(struct net_device *dev, 2044 void __user *useraddr) 2045 { 2046 struct ethtool_dump dump; 2047 2048 if (!dev->ethtool_ops->set_dump) 2049 return -EOPNOTSUPP; 2050 2051 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2052 return -EFAULT; 2053 2054 return dev->ethtool_ops->set_dump(dev, &dump); 2055 } 2056 2057 static int ethtool_get_dump_flag(struct net_device *dev, 2058 void __user *useraddr) 2059 { 2060 int ret; 2061 struct ethtool_dump dump; 2062 const struct ethtool_ops *ops = dev->ethtool_ops; 2063 2064 if (!ops->get_dump_flag) 2065 return -EOPNOTSUPP; 2066 2067 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2068 return -EFAULT; 2069 2070 ret = ops->get_dump_flag(dev, &dump); 2071 if (ret) 2072 return ret; 2073 2074 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2075 return -EFAULT; 2076 return 0; 2077 } 2078 2079 static int ethtool_get_dump_data(struct net_device *dev, 2080 void __user *useraddr) 2081 { 2082 int ret; 2083 __u32 len; 2084 struct ethtool_dump dump, tmp; 2085 const struct ethtool_ops *ops = dev->ethtool_ops; 2086 void *data = NULL; 2087 2088 if (!ops->get_dump_data || !ops->get_dump_flag) 2089 return -EOPNOTSUPP; 2090 2091 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2092 return -EFAULT; 2093 2094 memset(&tmp, 0, sizeof(tmp)); 2095 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2096 ret = ops->get_dump_flag(dev, &tmp); 2097 if (ret) 2098 return ret; 2099 2100 len = min(tmp.len, dump.len); 2101 if (!len) 2102 return -EFAULT; 2103 2104 /* Don't ever let the driver think there's more space available 2105 * than it requested with .get_dump_flag(). 2106 */ 2107 dump.len = len; 2108 2109 /* Always allocate enough space to hold the whole thing so that the 2110 * driver does not need to check the length and bother with partial 2111 * dumping. 2112 */ 2113 data = vzalloc(tmp.len); 2114 if (!data) 2115 return -ENOMEM; 2116 ret = ops->get_dump_data(dev, &dump, data); 2117 if (ret) 2118 goto out; 2119 2120 /* There are two sane possibilities: 2121 * 1. The driver's .get_dump_data() does not touch dump.len. 2122 * 2. Or it may set dump.len to how much it really writes, which 2123 * should be tmp.len (or len if it can do a partial dump). 2124 * In any case respond to userspace with the actual length of data 2125 * it's receiving. 2126 */ 2127 WARN_ON(dump.len != len && dump.len != tmp.len); 2128 dump.len = len; 2129 2130 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2131 ret = -EFAULT; 2132 goto out; 2133 } 2134 useraddr += offsetof(struct ethtool_dump, data); 2135 if (copy_to_user(useraddr, data, len)) 2136 ret = -EFAULT; 2137 out: 2138 vfree(data); 2139 return ret; 2140 } 2141 2142 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2143 { 2144 struct ethtool_ts_info info; 2145 int err; 2146 2147 err = __ethtool_get_ts_info(dev, &info); 2148 if (err) 2149 return err; 2150 2151 if (copy_to_user(useraddr, &info, sizeof(info))) 2152 return -EFAULT; 2153 2154 return 0; 2155 } 2156 2157 static int __ethtool_get_module_info(struct net_device *dev, 2158 struct ethtool_modinfo *modinfo) 2159 { 2160 const struct ethtool_ops *ops = dev->ethtool_ops; 2161 struct phy_device *phydev = dev->phydev; 2162 2163 if (dev->sfp_bus) 2164 return sfp_get_module_info(dev->sfp_bus, modinfo); 2165 2166 if (phydev && phydev->drv && phydev->drv->module_info) 2167 return phydev->drv->module_info(phydev, modinfo); 2168 2169 if (ops->get_module_info) 2170 return ops->get_module_info(dev, modinfo); 2171 2172 return -EOPNOTSUPP; 2173 } 2174 2175 static int ethtool_get_module_info(struct net_device *dev, 2176 void __user *useraddr) 2177 { 2178 int ret; 2179 struct ethtool_modinfo modinfo; 2180 2181 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2182 return -EFAULT; 2183 2184 ret = __ethtool_get_module_info(dev, &modinfo); 2185 if (ret) 2186 return ret; 2187 2188 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2189 return -EFAULT; 2190 2191 return 0; 2192 } 2193 2194 static int __ethtool_get_module_eeprom(struct net_device *dev, 2195 struct ethtool_eeprom *ee, u8 *data) 2196 { 2197 const struct ethtool_ops *ops = dev->ethtool_ops; 2198 struct phy_device *phydev = dev->phydev; 2199 2200 if (dev->sfp_bus) 2201 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2202 2203 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2204 return phydev->drv->module_eeprom(phydev, ee, data); 2205 2206 if (ops->get_module_eeprom) 2207 return ops->get_module_eeprom(dev, ee, data); 2208 2209 return -EOPNOTSUPP; 2210 } 2211 2212 static int ethtool_get_module_eeprom(struct net_device *dev, 2213 void __user *useraddr) 2214 { 2215 int ret; 2216 struct ethtool_modinfo modinfo; 2217 2218 ret = __ethtool_get_module_info(dev, &modinfo); 2219 if (ret) 2220 return ret; 2221 2222 return ethtool_get_any_eeprom(dev, useraddr, 2223 __ethtool_get_module_eeprom, 2224 modinfo.eeprom_len); 2225 } 2226 2227 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2228 { 2229 switch (tuna->id) { 2230 case ETHTOOL_RX_COPYBREAK: 2231 case ETHTOOL_TX_COPYBREAK: 2232 if (tuna->len != sizeof(u32) || 2233 tuna->type_id != ETHTOOL_TUNABLE_U32) 2234 return -EINVAL; 2235 break; 2236 case ETHTOOL_PFC_PREVENTION_TOUT: 2237 if (tuna->len != sizeof(u16) || 2238 tuna->type_id != ETHTOOL_TUNABLE_U16) 2239 return -EINVAL; 2240 break; 2241 default: 2242 return -EINVAL; 2243 } 2244 2245 return 0; 2246 } 2247 2248 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2249 { 2250 int ret; 2251 struct ethtool_tunable tuna; 2252 const struct ethtool_ops *ops = dev->ethtool_ops; 2253 void *data; 2254 2255 if (!ops->get_tunable) 2256 return -EOPNOTSUPP; 2257 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2258 return -EFAULT; 2259 ret = ethtool_tunable_valid(&tuna); 2260 if (ret) 2261 return ret; 2262 data = kmalloc(tuna.len, GFP_USER); 2263 if (!data) 2264 return -ENOMEM; 2265 ret = ops->get_tunable(dev, &tuna, data); 2266 if (ret) 2267 goto out; 2268 useraddr += sizeof(tuna); 2269 ret = -EFAULT; 2270 if (copy_to_user(useraddr, data, tuna.len)) 2271 goto out; 2272 ret = 0; 2273 2274 out: 2275 kfree(data); 2276 return ret; 2277 } 2278 2279 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2280 { 2281 int ret; 2282 struct ethtool_tunable tuna; 2283 const struct ethtool_ops *ops = dev->ethtool_ops; 2284 void *data; 2285 2286 if (!ops->set_tunable) 2287 return -EOPNOTSUPP; 2288 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2289 return -EFAULT; 2290 ret = ethtool_tunable_valid(&tuna); 2291 if (ret) 2292 return ret; 2293 useraddr += sizeof(tuna); 2294 data = memdup_user(useraddr, tuna.len); 2295 if (IS_ERR(data)) 2296 return PTR_ERR(data); 2297 ret = ops->set_tunable(dev, &tuna, data); 2298 2299 kfree(data); 2300 return ret; 2301 } 2302 2303 static noinline_for_stack int 2304 ethtool_get_per_queue_coalesce(struct net_device *dev, 2305 void __user *useraddr, 2306 struct ethtool_per_queue_op *per_queue_opt) 2307 { 2308 u32 bit; 2309 int ret; 2310 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2311 2312 if (!dev->ethtool_ops->get_per_queue_coalesce) 2313 return -EOPNOTSUPP; 2314 2315 useraddr += sizeof(*per_queue_opt); 2316 2317 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2318 MAX_NUM_QUEUE); 2319 2320 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2321 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2322 2323 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2324 if (ret != 0) 2325 return ret; 2326 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2327 return -EFAULT; 2328 useraddr += sizeof(coalesce); 2329 } 2330 2331 return 0; 2332 } 2333 2334 static noinline_for_stack int 2335 ethtool_set_per_queue_coalesce(struct net_device *dev, 2336 void __user *useraddr, 2337 struct ethtool_per_queue_op *per_queue_opt) 2338 { 2339 u32 bit; 2340 int i, ret = 0; 2341 int n_queue; 2342 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2343 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2344 2345 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2346 (!dev->ethtool_ops->get_per_queue_coalesce)) 2347 return -EOPNOTSUPP; 2348 2349 useraddr += sizeof(*per_queue_opt); 2350 2351 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2352 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2353 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2354 if (!backup) 2355 return -ENOMEM; 2356 2357 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2358 struct ethtool_coalesce coalesce; 2359 2360 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2361 if (ret != 0) 2362 goto roll_back; 2363 2364 tmp++; 2365 2366 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2367 ret = -EFAULT; 2368 goto roll_back; 2369 } 2370 2371 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2372 ret = -EOPNOTSUPP; 2373 goto roll_back; 2374 } 2375 2376 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2377 if (ret != 0) 2378 goto roll_back; 2379 2380 useraddr += sizeof(coalesce); 2381 } 2382 2383 roll_back: 2384 if (ret != 0) { 2385 tmp = backup; 2386 for_each_set_bit(i, queue_mask, bit) { 2387 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2388 tmp++; 2389 } 2390 } 2391 kfree(backup); 2392 2393 return ret; 2394 } 2395 2396 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2397 void __user *useraddr, u32 sub_cmd) 2398 { 2399 struct ethtool_per_queue_op per_queue_opt; 2400 2401 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2402 return -EFAULT; 2403 2404 if (per_queue_opt.sub_command != sub_cmd) 2405 return -EINVAL; 2406 2407 switch (per_queue_opt.sub_command) { 2408 case ETHTOOL_GCOALESCE: 2409 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2410 case ETHTOOL_SCOALESCE: 2411 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2412 default: 2413 return -EOPNOTSUPP; 2414 }; 2415 } 2416 2417 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2418 { 2419 switch (tuna->id) { 2420 case ETHTOOL_PHY_DOWNSHIFT: 2421 case ETHTOOL_PHY_FAST_LINK_DOWN: 2422 if (tuna->len != sizeof(u8) || 2423 tuna->type_id != ETHTOOL_TUNABLE_U8) 2424 return -EINVAL; 2425 break; 2426 case ETHTOOL_PHY_EDPD: 2427 if (tuna->len != sizeof(u16) || 2428 tuna->type_id != ETHTOOL_TUNABLE_U16) 2429 return -EINVAL; 2430 break; 2431 default: 2432 return -EINVAL; 2433 } 2434 2435 return 0; 2436 } 2437 2438 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2439 { 2440 int ret; 2441 struct ethtool_tunable tuna; 2442 struct phy_device *phydev = dev->phydev; 2443 void *data; 2444 2445 if (!(phydev && phydev->drv && phydev->drv->get_tunable)) 2446 return -EOPNOTSUPP; 2447 2448 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2449 return -EFAULT; 2450 ret = ethtool_phy_tunable_valid(&tuna); 2451 if (ret) 2452 return ret; 2453 data = kmalloc(tuna.len, GFP_USER); 2454 if (!data) 2455 return -ENOMEM; 2456 mutex_lock(&phydev->lock); 2457 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2458 mutex_unlock(&phydev->lock); 2459 if (ret) 2460 goto out; 2461 useraddr += sizeof(tuna); 2462 ret = -EFAULT; 2463 if (copy_to_user(useraddr, data, tuna.len)) 2464 goto out; 2465 ret = 0; 2466 2467 out: 2468 kfree(data); 2469 return ret; 2470 } 2471 2472 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2473 { 2474 int ret; 2475 struct ethtool_tunable tuna; 2476 struct phy_device *phydev = dev->phydev; 2477 void *data; 2478 2479 if (!(phydev && phydev->drv && phydev->drv->set_tunable)) 2480 return -EOPNOTSUPP; 2481 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2482 return -EFAULT; 2483 ret = ethtool_phy_tunable_valid(&tuna); 2484 if (ret) 2485 return ret; 2486 useraddr += sizeof(tuna); 2487 data = memdup_user(useraddr, tuna.len); 2488 if (IS_ERR(data)) 2489 return PTR_ERR(data); 2490 mutex_lock(&phydev->lock); 2491 ret = phydev->drv->set_tunable(phydev, &tuna, data); 2492 mutex_unlock(&phydev->lock); 2493 2494 kfree(data); 2495 return ret; 2496 } 2497 2498 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 2499 { 2500 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 2501 int rc; 2502 2503 if (!dev->ethtool_ops->get_fecparam) 2504 return -EOPNOTSUPP; 2505 2506 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 2507 if (rc) 2508 return rc; 2509 2510 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 2511 return -EFAULT; 2512 return 0; 2513 } 2514 2515 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 2516 { 2517 struct ethtool_fecparam fecparam; 2518 2519 if (!dev->ethtool_ops->set_fecparam) 2520 return -EOPNOTSUPP; 2521 2522 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 2523 return -EFAULT; 2524 2525 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 2526 } 2527 2528 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 2529 2530 int dev_ethtool(struct net *net, struct ifreq *ifr) 2531 { 2532 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 2533 void __user *useraddr = ifr->ifr_data; 2534 u32 ethcmd, sub_cmd; 2535 int rc; 2536 netdev_features_t old_features; 2537 2538 if (!dev || !netif_device_present(dev)) 2539 return -ENODEV; 2540 2541 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 2542 return -EFAULT; 2543 2544 if (ethcmd == ETHTOOL_PERQUEUE) { 2545 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 2546 return -EFAULT; 2547 } else { 2548 sub_cmd = ethcmd; 2549 } 2550 /* Allow some commands to be done by anyone */ 2551 switch (sub_cmd) { 2552 case ETHTOOL_GSET: 2553 case ETHTOOL_GDRVINFO: 2554 case ETHTOOL_GMSGLVL: 2555 case ETHTOOL_GLINK: 2556 case ETHTOOL_GCOALESCE: 2557 case ETHTOOL_GRINGPARAM: 2558 case ETHTOOL_GPAUSEPARAM: 2559 case ETHTOOL_GRXCSUM: 2560 case ETHTOOL_GTXCSUM: 2561 case ETHTOOL_GSG: 2562 case ETHTOOL_GSSET_INFO: 2563 case ETHTOOL_GSTRINGS: 2564 case ETHTOOL_GSTATS: 2565 case ETHTOOL_GPHYSTATS: 2566 case ETHTOOL_GTSO: 2567 case ETHTOOL_GPERMADDR: 2568 case ETHTOOL_GUFO: 2569 case ETHTOOL_GGSO: 2570 case ETHTOOL_GGRO: 2571 case ETHTOOL_GFLAGS: 2572 case ETHTOOL_GPFLAGS: 2573 case ETHTOOL_GRXFH: 2574 case ETHTOOL_GRXRINGS: 2575 case ETHTOOL_GRXCLSRLCNT: 2576 case ETHTOOL_GRXCLSRULE: 2577 case ETHTOOL_GRXCLSRLALL: 2578 case ETHTOOL_GRXFHINDIR: 2579 case ETHTOOL_GRSSH: 2580 case ETHTOOL_GFEATURES: 2581 case ETHTOOL_GCHANNELS: 2582 case ETHTOOL_GET_TS_INFO: 2583 case ETHTOOL_GEEE: 2584 case ETHTOOL_GTUNABLE: 2585 case ETHTOOL_PHY_GTUNABLE: 2586 case ETHTOOL_GLINKSETTINGS: 2587 case ETHTOOL_GFECPARAM: 2588 break; 2589 default: 2590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2591 return -EPERM; 2592 } 2593 2594 if (dev->ethtool_ops->begin) { 2595 rc = dev->ethtool_ops->begin(dev); 2596 if (rc < 0) 2597 return rc; 2598 } 2599 old_features = dev->features; 2600 2601 switch (ethcmd) { 2602 case ETHTOOL_GSET: 2603 rc = ethtool_get_settings(dev, useraddr); 2604 break; 2605 case ETHTOOL_SSET: 2606 rc = ethtool_set_settings(dev, useraddr); 2607 break; 2608 case ETHTOOL_GDRVINFO: 2609 rc = ethtool_get_drvinfo(dev, useraddr); 2610 break; 2611 case ETHTOOL_GREGS: 2612 rc = ethtool_get_regs(dev, useraddr); 2613 break; 2614 case ETHTOOL_GWOL: 2615 rc = ethtool_get_wol(dev, useraddr); 2616 break; 2617 case ETHTOOL_SWOL: 2618 rc = ethtool_set_wol(dev, useraddr); 2619 break; 2620 case ETHTOOL_GMSGLVL: 2621 rc = ethtool_get_value(dev, useraddr, ethcmd, 2622 dev->ethtool_ops->get_msglevel); 2623 break; 2624 case ETHTOOL_SMSGLVL: 2625 rc = ethtool_set_value_void(dev, useraddr, 2626 dev->ethtool_ops->set_msglevel); 2627 if (!rc) 2628 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 2629 break; 2630 case ETHTOOL_GEEE: 2631 rc = ethtool_get_eee(dev, useraddr); 2632 break; 2633 case ETHTOOL_SEEE: 2634 rc = ethtool_set_eee(dev, useraddr); 2635 break; 2636 case ETHTOOL_NWAY_RST: 2637 rc = ethtool_nway_reset(dev); 2638 break; 2639 case ETHTOOL_GLINK: 2640 rc = ethtool_get_link(dev, useraddr); 2641 break; 2642 case ETHTOOL_GEEPROM: 2643 rc = ethtool_get_eeprom(dev, useraddr); 2644 break; 2645 case ETHTOOL_SEEPROM: 2646 rc = ethtool_set_eeprom(dev, useraddr); 2647 break; 2648 case ETHTOOL_GCOALESCE: 2649 rc = ethtool_get_coalesce(dev, useraddr); 2650 break; 2651 case ETHTOOL_SCOALESCE: 2652 rc = ethtool_set_coalesce(dev, useraddr); 2653 break; 2654 case ETHTOOL_GRINGPARAM: 2655 rc = ethtool_get_ringparam(dev, useraddr); 2656 break; 2657 case ETHTOOL_SRINGPARAM: 2658 rc = ethtool_set_ringparam(dev, useraddr); 2659 break; 2660 case ETHTOOL_GPAUSEPARAM: 2661 rc = ethtool_get_pauseparam(dev, useraddr); 2662 break; 2663 case ETHTOOL_SPAUSEPARAM: 2664 rc = ethtool_set_pauseparam(dev, useraddr); 2665 break; 2666 case ETHTOOL_TEST: 2667 rc = ethtool_self_test(dev, useraddr); 2668 break; 2669 case ETHTOOL_GSTRINGS: 2670 rc = ethtool_get_strings(dev, useraddr); 2671 break; 2672 case ETHTOOL_PHYS_ID: 2673 rc = ethtool_phys_id(dev, useraddr); 2674 break; 2675 case ETHTOOL_GSTATS: 2676 rc = ethtool_get_stats(dev, useraddr); 2677 break; 2678 case ETHTOOL_GPERMADDR: 2679 rc = ethtool_get_perm_addr(dev, useraddr); 2680 break; 2681 case ETHTOOL_GFLAGS: 2682 rc = ethtool_get_value(dev, useraddr, ethcmd, 2683 __ethtool_get_flags); 2684 break; 2685 case ETHTOOL_SFLAGS: 2686 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 2687 break; 2688 case ETHTOOL_GPFLAGS: 2689 rc = ethtool_get_value(dev, useraddr, ethcmd, 2690 dev->ethtool_ops->get_priv_flags); 2691 if (!rc) 2692 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 2693 break; 2694 case ETHTOOL_SPFLAGS: 2695 rc = ethtool_set_value(dev, useraddr, 2696 dev->ethtool_ops->set_priv_flags); 2697 break; 2698 case ETHTOOL_GRXFH: 2699 case ETHTOOL_GRXRINGS: 2700 case ETHTOOL_GRXCLSRLCNT: 2701 case ETHTOOL_GRXCLSRULE: 2702 case ETHTOOL_GRXCLSRLALL: 2703 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 2704 break; 2705 case ETHTOOL_SRXFH: 2706 case ETHTOOL_SRXCLSRLDEL: 2707 case ETHTOOL_SRXCLSRLINS: 2708 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 2709 break; 2710 case ETHTOOL_FLASHDEV: 2711 rc = ethtool_flash_device(dev, useraddr); 2712 break; 2713 case ETHTOOL_RESET: 2714 rc = ethtool_reset(dev, useraddr); 2715 break; 2716 case ETHTOOL_GSSET_INFO: 2717 rc = ethtool_get_sset_info(dev, useraddr); 2718 break; 2719 case ETHTOOL_GRXFHINDIR: 2720 rc = ethtool_get_rxfh_indir(dev, useraddr); 2721 break; 2722 case ETHTOOL_SRXFHINDIR: 2723 rc = ethtool_set_rxfh_indir(dev, useraddr); 2724 break; 2725 case ETHTOOL_GRSSH: 2726 rc = ethtool_get_rxfh(dev, useraddr); 2727 break; 2728 case ETHTOOL_SRSSH: 2729 rc = ethtool_set_rxfh(dev, useraddr); 2730 break; 2731 case ETHTOOL_GFEATURES: 2732 rc = ethtool_get_features(dev, useraddr); 2733 break; 2734 case ETHTOOL_SFEATURES: 2735 rc = ethtool_set_features(dev, useraddr); 2736 break; 2737 case ETHTOOL_GTXCSUM: 2738 case ETHTOOL_GRXCSUM: 2739 case ETHTOOL_GSG: 2740 case ETHTOOL_GTSO: 2741 case ETHTOOL_GGSO: 2742 case ETHTOOL_GGRO: 2743 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 2744 break; 2745 case ETHTOOL_STXCSUM: 2746 case ETHTOOL_SRXCSUM: 2747 case ETHTOOL_SSG: 2748 case ETHTOOL_STSO: 2749 case ETHTOOL_SGSO: 2750 case ETHTOOL_SGRO: 2751 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 2752 break; 2753 case ETHTOOL_GCHANNELS: 2754 rc = ethtool_get_channels(dev, useraddr); 2755 break; 2756 case ETHTOOL_SCHANNELS: 2757 rc = ethtool_set_channels(dev, useraddr); 2758 break; 2759 case ETHTOOL_SET_DUMP: 2760 rc = ethtool_set_dump(dev, useraddr); 2761 break; 2762 case ETHTOOL_GET_DUMP_FLAG: 2763 rc = ethtool_get_dump_flag(dev, useraddr); 2764 break; 2765 case ETHTOOL_GET_DUMP_DATA: 2766 rc = ethtool_get_dump_data(dev, useraddr); 2767 break; 2768 case ETHTOOL_GET_TS_INFO: 2769 rc = ethtool_get_ts_info(dev, useraddr); 2770 break; 2771 case ETHTOOL_GMODULEINFO: 2772 rc = ethtool_get_module_info(dev, useraddr); 2773 break; 2774 case ETHTOOL_GMODULEEEPROM: 2775 rc = ethtool_get_module_eeprom(dev, useraddr); 2776 break; 2777 case ETHTOOL_GTUNABLE: 2778 rc = ethtool_get_tunable(dev, useraddr); 2779 break; 2780 case ETHTOOL_STUNABLE: 2781 rc = ethtool_set_tunable(dev, useraddr); 2782 break; 2783 case ETHTOOL_GPHYSTATS: 2784 rc = ethtool_get_phy_stats(dev, useraddr); 2785 break; 2786 case ETHTOOL_PERQUEUE: 2787 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 2788 break; 2789 case ETHTOOL_GLINKSETTINGS: 2790 rc = ethtool_get_link_ksettings(dev, useraddr); 2791 break; 2792 case ETHTOOL_SLINKSETTINGS: 2793 rc = ethtool_set_link_ksettings(dev, useraddr); 2794 break; 2795 case ETHTOOL_PHY_GTUNABLE: 2796 rc = get_phy_tunable(dev, useraddr); 2797 break; 2798 case ETHTOOL_PHY_STUNABLE: 2799 rc = set_phy_tunable(dev, useraddr); 2800 break; 2801 case ETHTOOL_GFECPARAM: 2802 rc = ethtool_get_fecparam(dev, useraddr); 2803 break; 2804 case ETHTOOL_SFECPARAM: 2805 rc = ethtool_set_fecparam(dev, useraddr); 2806 break; 2807 default: 2808 rc = -EOPNOTSUPP; 2809 } 2810 2811 if (dev->ethtool_ops->complete) 2812 dev->ethtool_ops->complete(dev); 2813 2814 if (old_features != dev->features) 2815 netdev_features_change(dev); 2816 2817 return rc; 2818 } 2819 2820 struct ethtool_rx_flow_key { 2821 struct flow_dissector_key_basic basic; 2822 union { 2823 struct flow_dissector_key_ipv4_addrs ipv4; 2824 struct flow_dissector_key_ipv6_addrs ipv6; 2825 }; 2826 struct flow_dissector_key_ports tp; 2827 struct flow_dissector_key_ip ip; 2828 struct flow_dissector_key_vlan vlan; 2829 struct flow_dissector_key_eth_addrs eth_addrs; 2830 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 2831 2832 struct ethtool_rx_flow_match { 2833 struct flow_dissector dissector; 2834 struct ethtool_rx_flow_key key; 2835 struct ethtool_rx_flow_key mask; 2836 }; 2837 2838 struct ethtool_rx_flow_rule * 2839 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 2840 { 2841 const struct ethtool_rx_flow_spec *fs = input->fs; 2842 static struct in6_addr zero_addr = {}; 2843 struct ethtool_rx_flow_match *match; 2844 struct ethtool_rx_flow_rule *flow; 2845 struct flow_action_entry *act; 2846 2847 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 2848 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 2849 if (!flow) 2850 return ERR_PTR(-ENOMEM); 2851 2852 /* ethtool_rx supports only one single action per rule. */ 2853 flow->rule = flow_rule_alloc(1); 2854 if (!flow->rule) { 2855 kfree(flow); 2856 return ERR_PTR(-ENOMEM); 2857 } 2858 2859 match = (struct ethtool_rx_flow_match *)flow->priv; 2860 flow->rule->match.dissector = &match->dissector; 2861 flow->rule->match.mask = &match->mask; 2862 flow->rule->match.key = &match->key; 2863 2864 match->mask.basic.n_proto = htons(0xffff); 2865 2866 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2867 case ETHER_FLOW: { 2868 const struct ethhdr *ether_spec, *ether_m_spec; 2869 2870 ether_spec = &fs->h_u.ether_spec; 2871 ether_m_spec = &fs->m_u.ether_spec; 2872 2873 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 2874 ether_addr_copy(match->key.eth_addrs.src, 2875 ether_spec->h_source); 2876 ether_addr_copy(match->mask.eth_addrs.src, 2877 ether_m_spec->h_source); 2878 } 2879 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 2880 ether_addr_copy(match->key.eth_addrs.dst, 2881 ether_spec->h_dest); 2882 ether_addr_copy(match->mask.eth_addrs.dst, 2883 ether_m_spec->h_dest); 2884 } 2885 if (ether_m_spec->h_proto) { 2886 match->key.basic.n_proto = ether_spec->h_proto; 2887 match->mask.basic.n_proto = ether_m_spec->h_proto; 2888 } 2889 } 2890 break; 2891 case TCP_V4_FLOW: 2892 case UDP_V4_FLOW: { 2893 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 2894 2895 match->key.basic.n_proto = htons(ETH_P_IP); 2896 2897 v4_spec = &fs->h_u.tcp_ip4_spec; 2898 v4_m_spec = &fs->m_u.tcp_ip4_spec; 2899 2900 if (v4_m_spec->ip4src) { 2901 match->key.ipv4.src = v4_spec->ip4src; 2902 match->mask.ipv4.src = v4_m_spec->ip4src; 2903 } 2904 if (v4_m_spec->ip4dst) { 2905 match->key.ipv4.dst = v4_spec->ip4dst; 2906 match->mask.ipv4.dst = v4_m_spec->ip4dst; 2907 } 2908 if (v4_m_spec->ip4src || 2909 v4_m_spec->ip4dst) { 2910 match->dissector.used_keys |= 2911 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 2912 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 2913 offsetof(struct ethtool_rx_flow_key, ipv4); 2914 } 2915 if (v4_m_spec->psrc) { 2916 match->key.tp.src = v4_spec->psrc; 2917 match->mask.tp.src = v4_m_spec->psrc; 2918 } 2919 if (v4_m_spec->pdst) { 2920 match->key.tp.dst = v4_spec->pdst; 2921 match->mask.tp.dst = v4_m_spec->pdst; 2922 } 2923 if (v4_m_spec->psrc || 2924 v4_m_spec->pdst) { 2925 match->dissector.used_keys |= 2926 BIT(FLOW_DISSECTOR_KEY_PORTS); 2927 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2928 offsetof(struct ethtool_rx_flow_key, tp); 2929 } 2930 if (v4_m_spec->tos) { 2931 match->key.ip.tos = v4_spec->tos; 2932 match->mask.ip.tos = v4_m_spec->tos; 2933 match->dissector.used_keys |= 2934 BIT(FLOW_DISSECTOR_KEY_IP); 2935 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2936 offsetof(struct ethtool_rx_flow_key, ip); 2937 } 2938 } 2939 break; 2940 case TCP_V6_FLOW: 2941 case UDP_V6_FLOW: { 2942 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 2943 2944 match->key.basic.n_proto = htons(ETH_P_IPV6); 2945 2946 v6_spec = &fs->h_u.tcp_ip6_spec; 2947 v6_m_spec = &fs->m_u.tcp_ip6_spec; 2948 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2949 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 2950 sizeof(match->key.ipv6.src)); 2951 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 2952 sizeof(match->mask.ipv6.src)); 2953 } 2954 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2955 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 2956 sizeof(match->key.ipv6.dst)); 2957 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 2958 sizeof(match->mask.ipv6.dst)); 2959 } 2960 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) || 2961 memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2962 match->dissector.used_keys |= 2963 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 2964 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 2965 offsetof(struct ethtool_rx_flow_key, ipv6); 2966 } 2967 if (v6_m_spec->psrc) { 2968 match->key.tp.src = v6_spec->psrc; 2969 match->mask.tp.src = v6_m_spec->psrc; 2970 } 2971 if (v6_m_spec->pdst) { 2972 match->key.tp.dst = v6_spec->pdst; 2973 match->mask.tp.dst = v6_m_spec->pdst; 2974 } 2975 if (v6_m_spec->psrc || 2976 v6_m_spec->pdst) { 2977 match->dissector.used_keys |= 2978 BIT(FLOW_DISSECTOR_KEY_PORTS); 2979 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2980 offsetof(struct ethtool_rx_flow_key, tp); 2981 } 2982 if (v6_m_spec->tclass) { 2983 match->key.ip.tos = v6_spec->tclass; 2984 match->mask.ip.tos = v6_m_spec->tclass; 2985 match->dissector.used_keys |= 2986 BIT(FLOW_DISSECTOR_KEY_IP); 2987 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2988 offsetof(struct ethtool_rx_flow_key, ip); 2989 } 2990 } 2991 break; 2992 default: 2993 ethtool_rx_flow_rule_destroy(flow); 2994 return ERR_PTR(-EINVAL); 2995 } 2996 2997 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2998 case TCP_V4_FLOW: 2999 case TCP_V6_FLOW: 3000 match->key.basic.ip_proto = IPPROTO_TCP; 3001 break; 3002 case UDP_V4_FLOW: 3003 case UDP_V6_FLOW: 3004 match->key.basic.ip_proto = IPPROTO_UDP; 3005 break; 3006 } 3007 match->mask.basic.ip_proto = 0xff; 3008 3009 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC); 3010 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3011 offsetof(struct ethtool_rx_flow_key, basic); 3012 3013 if (fs->flow_type & FLOW_EXT) { 3014 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3015 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3016 3017 if (ext_m_spec->vlan_etype) { 3018 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3019 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3020 } 3021 3022 if (ext_m_spec->vlan_tci) { 3023 match->key.vlan.vlan_id = 3024 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3025 match->mask.vlan.vlan_id = 3026 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3027 3028 match->key.vlan.vlan_dei = 3029 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3030 match->mask.vlan.vlan_dei = 3031 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3032 3033 match->key.vlan.vlan_priority = 3034 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3035 match->mask.vlan.vlan_priority = 3036 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3037 } 3038 3039 if (ext_m_spec->vlan_etype || 3040 ext_m_spec->vlan_tci) { 3041 match->dissector.used_keys |= 3042 BIT(FLOW_DISSECTOR_KEY_VLAN); 3043 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3044 offsetof(struct ethtool_rx_flow_key, vlan); 3045 } 3046 } 3047 if (fs->flow_type & FLOW_MAC_EXT) { 3048 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3049 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3050 3051 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3052 ETH_ALEN); 3053 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3054 ETH_ALEN); 3055 3056 match->dissector.used_keys |= 3057 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3058 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3059 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3060 } 3061 3062 act = &flow->rule->action.entries[0]; 3063 switch (fs->ring_cookie) { 3064 case RX_CLS_FLOW_DISC: 3065 act->id = FLOW_ACTION_DROP; 3066 break; 3067 case RX_CLS_FLOW_WAKE: 3068 act->id = FLOW_ACTION_WAKE; 3069 break; 3070 default: 3071 act->id = FLOW_ACTION_QUEUE; 3072 if (fs->flow_type & FLOW_RSS) 3073 act->queue.ctx = input->rss_ctx; 3074 3075 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3076 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3077 break; 3078 } 3079 3080 return flow; 3081 } 3082 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3083 3084 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3085 { 3086 kfree(flow->rule); 3087 kfree(flow); 3088 } 3089 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3090