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_drv.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_phy_ops *phy_ops = ethtool_phy_ops; 139 const struct ethtool_ops *ops = dev->ethtool_ops; 140 141 if (sset == ETH_SS_FEATURES) 142 return ARRAY_SIZE(netdev_features_strings); 143 144 if (sset == ETH_SS_RSS_HASH_FUNCS) 145 return ARRAY_SIZE(rss_hash_func_strings); 146 147 if (sset == ETH_SS_TUNABLES) 148 return ARRAY_SIZE(tunable_strings); 149 150 if (sset == ETH_SS_PHY_TUNABLES) 151 return ARRAY_SIZE(phy_tunable_strings); 152 153 if (sset == ETH_SS_PHY_STATS && dev->phydev && 154 !ops->get_ethtool_phy_stats && 155 phy_ops && phy_ops->get_sset_count) 156 return phy_ops->get_sset_count(dev->phydev); 157 158 if (sset == ETH_SS_LINK_MODES) 159 return __ETHTOOL_LINK_MODE_MASK_NBITS; 160 161 if (ops->get_sset_count && ops->get_strings) 162 return ops->get_sset_count(dev, sset); 163 else 164 return -EOPNOTSUPP; 165 } 166 167 static void __ethtool_get_strings(struct net_device *dev, 168 u32 stringset, u8 *data) 169 { 170 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 171 const struct ethtool_ops *ops = dev->ethtool_ops; 172 173 if (stringset == ETH_SS_FEATURES) 174 memcpy(data, netdev_features_strings, 175 sizeof(netdev_features_strings)); 176 else if (stringset == ETH_SS_RSS_HASH_FUNCS) 177 memcpy(data, rss_hash_func_strings, 178 sizeof(rss_hash_func_strings)); 179 else if (stringset == ETH_SS_TUNABLES) 180 memcpy(data, tunable_strings, sizeof(tunable_strings)); 181 else if (stringset == ETH_SS_PHY_TUNABLES) 182 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings)); 183 else if (stringset == ETH_SS_PHY_STATS && dev->phydev && 184 !ops->get_ethtool_phy_stats && phy_ops && 185 phy_ops->get_strings) 186 phy_ops->get_strings(dev->phydev, data); 187 else if (stringset == ETH_SS_LINK_MODES) 188 memcpy(data, link_mode_names, 189 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN); 190 else 191 /* ops->get_strings is valid because checked earlier */ 192 ops->get_strings(dev, stringset, data); 193 } 194 195 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) 196 { 197 /* feature masks of legacy discrete ethtool ops */ 198 199 switch (eth_cmd) { 200 case ETHTOOL_GTXCSUM: 201 case ETHTOOL_STXCSUM: 202 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC | 203 NETIF_F_SCTP_CRC; 204 case ETHTOOL_GRXCSUM: 205 case ETHTOOL_SRXCSUM: 206 return NETIF_F_RXCSUM; 207 case ETHTOOL_GSG: 208 case ETHTOOL_SSG: 209 return NETIF_F_SG | NETIF_F_FRAGLIST; 210 case ETHTOOL_GTSO: 211 case ETHTOOL_STSO: 212 return NETIF_F_ALL_TSO; 213 case ETHTOOL_GGSO: 214 case ETHTOOL_SGSO: 215 return NETIF_F_GSO; 216 case ETHTOOL_GGRO: 217 case ETHTOOL_SGRO: 218 return NETIF_F_GRO; 219 default: 220 BUG(); 221 } 222 } 223 224 static int ethtool_get_one_feature(struct net_device *dev, 225 char __user *useraddr, u32 ethcmd) 226 { 227 netdev_features_t mask = ethtool_get_feature_mask(ethcmd); 228 struct ethtool_value edata = { 229 .cmd = ethcmd, 230 .data = !!(dev->features & mask), 231 }; 232 233 if (copy_to_user(useraddr, &edata, sizeof(edata))) 234 return -EFAULT; 235 return 0; 236 } 237 238 static int ethtool_set_one_feature(struct net_device *dev, 239 void __user *useraddr, u32 ethcmd) 240 { 241 struct ethtool_value edata; 242 netdev_features_t mask; 243 244 if (copy_from_user(&edata, useraddr, sizeof(edata))) 245 return -EFAULT; 246 247 mask = ethtool_get_feature_mask(ethcmd); 248 mask &= dev->hw_features; 249 if (!mask) 250 return -EOPNOTSUPP; 251 252 if (edata.data) 253 dev->wanted_features |= mask; 254 else 255 dev->wanted_features &= ~mask; 256 257 __netdev_update_features(dev); 258 259 return 0; 260 } 261 262 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ 263 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) 264 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \ 265 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \ 266 NETIF_F_RXHASH) 267 268 static u32 __ethtool_get_flags(struct net_device *dev) 269 { 270 u32 flags = 0; 271 272 if (dev->features & NETIF_F_LRO) 273 flags |= ETH_FLAG_LRO; 274 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX) 275 flags |= ETH_FLAG_RXVLAN; 276 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) 277 flags |= ETH_FLAG_TXVLAN; 278 if (dev->features & NETIF_F_NTUPLE) 279 flags |= ETH_FLAG_NTUPLE; 280 if (dev->features & NETIF_F_RXHASH) 281 flags |= ETH_FLAG_RXHASH; 282 283 return flags; 284 } 285 286 static int __ethtool_set_flags(struct net_device *dev, u32 data) 287 { 288 netdev_features_t features = 0, changed; 289 290 if (data & ~ETH_ALL_FLAGS) 291 return -EINVAL; 292 293 if (data & ETH_FLAG_LRO) 294 features |= NETIF_F_LRO; 295 if (data & ETH_FLAG_RXVLAN) 296 features |= NETIF_F_HW_VLAN_CTAG_RX; 297 if (data & ETH_FLAG_TXVLAN) 298 features |= NETIF_F_HW_VLAN_CTAG_TX; 299 if (data & ETH_FLAG_NTUPLE) 300 features |= NETIF_F_NTUPLE; 301 if (data & ETH_FLAG_RXHASH) 302 features |= NETIF_F_RXHASH; 303 304 /* allow changing only bits set in hw_features */ 305 changed = (features ^ dev->features) & ETH_ALL_FEATURES; 306 if (changed & ~dev->hw_features) 307 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; 308 309 dev->wanted_features = 310 (dev->wanted_features & ~changed) | (features & changed); 311 312 __netdev_update_features(dev); 313 314 return 0; 315 } 316 317 /* Given two link masks, AND them together and save the result in dst. */ 318 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst, 319 struct ethtool_link_ksettings *src) 320 { 321 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS); 322 unsigned int idx = 0; 323 324 for (; idx < size; idx++) { 325 dst->link_modes.supported[idx] &= 326 src->link_modes.supported[idx]; 327 dst->link_modes.advertising[idx] &= 328 src->link_modes.advertising[idx]; 329 } 330 } 331 EXPORT_SYMBOL(ethtool_intersect_link_masks); 332 333 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst, 334 u32 legacy_u32) 335 { 336 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS); 337 dst[0] = legacy_u32; 338 } 339 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode); 340 341 /* return false if src had higher bits set. lower bits always updated. */ 342 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, 343 const unsigned long *src) 344 { 345 bool retval = true; 346 347 /* TODO: following test will soon always be true */ 348 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) { 349 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext); 350 351 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 352 bitmap_fill(ext, 32); 353 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 354 if (bitmap_intersects(ext, src, 355 __ETHTOOL_LINK_MODE_MASK_NBITS)) { 356 /* src mask goes beyond bit 31 */ 357 retval = false; 358 } 359 } 360 *legacy_u32 = src[0]; 361 return retval; 362 } 363 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); 364 365 /* return false if ksettings link modes had higher bits 366 * set. legacy_settings always updated (best effort) 367 */ 368 static bool 369 convert_link_ksettings_to_legacy_settings( 370 struct ethtool_cmd *legacy_settings, 371 const struct ethtool_link_ksettings *link_ksettings) 372 { 373 bool retval = true; 374 375 memset(legacy_settings, 0, sizeof(*legacy_settings)); 376 /* this also clears the deprecated fields in legacy structure: 377 * __u8 transceiver; 378 * __u32 maxtxpkt; 379 * __u32 maxrxpkt; 380 */ 381 382 retval &= ethtool_convert_link_mode_to_legacy_u32( 383 &legacy_settings->supported, 384 link_ksettings->link_modes.supported); 385 retval &= ethtool_convert_link_mode_to_legacy_u32( 386 &legacy_settings->advertising, 387 link_ksettings->link_modes.advertising); 388 retval &= ethtool_convert_link_mode_to_legacy_u32( 389 &legacy_settings->lp_advertising, 390 link_ksettings->link_modes.lp_advertising); 391 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed); 392 legacy_settings->duplex 393 = link_ksettings->base.duplex; 394 legacy_settings->port 395 = link_ksettings->base.port; 396 legacy_settings->phy_address 397 = link_ksettings->base.phy_address; 398 legacy_settings->autoneg 399 = link_ksettings->base.autoneg; 400 legacy_settings->mdio_support 401 = link_ksettings->base.mdio_support; 402 legacy_settings->eth_tp_mdix 403 = link_ksettings->base.eth_tp_mdix; 404 legacy_settings->eth_tp_mdix_ctrl 405 = link_ksettings->base.eth_tp_mdix_ctrl; 406 legacy_settings->transceiver 407 = link_ksettings->base.transceiver; 408 return retval; 409 } 410 411 /* number of 32-bit words to store the user's link mode bitmaps */ 412 #define __ETHTOOL_LINK_MODE_MASK_NU32 \ 413 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32) 414 415 /* layout of the struct passed from/to userland */ 416 struct ethtool_link_usettings { 417 struct ethtool_link_settings base; 418 struct { 419 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32]; 420 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 421 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 422 } link_modes; 423 }; 424 425 /* Internal kernel helper to query a device ethtool_link_settings. */ 426 int __ethtool_get_link_ksettings(struct net_device *dev, 427 struct ethtool_link_ksettings *link_ksettings) 428 { 429 ASSERT_RTNL(); 430 431 if (!dev->ethtool_ops->get_link_ksettings) 432 return -EOPNOTSUPP; 433 434 memset(link_ksettings, 0, sizeof(*link_ksettings)); 435 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings); 436 } 437 EXPORT_SYMBOL(__ethtool_get_link_ksettings); 438 439 /* convert ethtool_link_usettings in user space to a kernel internal 440 * ethtool_link_ksettings. return 0 on success, errno on error. 441 */ 442 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to, 443 const void __user *from) 444 { 445 struct ethtool_link_usettings link_usettings; 446 447 if (copy_from_user(&link_usettings, from, sizeof(link_usettings))) 448 return -EFAULT; 449 450 memcpy(&to->base, &link_usettings.base, sizeof(to->base)); 451 bitmap_from_arr32(to->link_modes.supported, 452 link_usettings.link_modes.supported, 453 __ETHTOOL_LINK_MODE_MASK_NBITS); 454 bitmap_from_arr32(to->link_modes.advertising, 455 link_usettings.link_modes.advertising, 456 __ETHTOOL_LINK_MODE_MASK_NBITS); 457 bitmap_from_arr32(to->link_modes.lp_advertising, 458 link_usettings.link_modes.lp_advertising, 459 __ETHTOOL_LINK_MODE_MASK_NBITS); 460 461 return 0; 462 } 463 464 /* Check if the user is trying to change anything besides speed/duplex */ 465 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd) 466 { 467 struct ethtool_link_settings base2 = {}; 468 469 base2.speed = cmd->base.speed; 470 base2.port = PORT_OTHER; 471 base2.duplex = cmd->base.duplex; 472 base2.cmd = cmd->base.cmd; 473 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords; 474 475 return !memcmp(&base2, &cmd->base, sizeof(base2)) && 476 bitmap_empty(cmd->link_modes.supported, 477 __ETHTOOL_LINK_MODE_MASK_NBITS) && 478 bitmap_empty(cmd->link_modes.lp_advertising, 479 __ETHTOOL_LINK_MODE_MASK_NBITS); 480 } 481 482 /* convert a kernel internal ethtool_link_ksettings to 483 * ethtool_link_usettings in user space. return 0 on success, errno on 484 * error. 485 */ 486 static int 487 store_link_ksettings_for_user(void __user *to, 488 const struct ethtool_link_ksettings *from) 489 { 490 struct ethtool_link_usettings link_usettings; 491 492 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings)); 493 bitmap_to_arr32(link_usettings.link_modes.supported, 494 from->link_modes.supported, 495 __ETHTOOL_LINK_MODE_MASK_NBITS); 496 bitmap_to_arr32(link_usettings.link_modes.advertising, 497 from->link_modes.advertising, 498 __ETHTOOL_LINK_MODE_MASK_NBITS); 499 bitmap_to_arr32(link_usettings.link_modes.lp_advertising, 500 from->link_modes.lp_advertising, 501 __ETHTOOL_LINK_MODE_MASK_NBITS); 502 503 if (copy_to_user(to, &link_usettings, sizeof(link_usettings))) 504 return -EFAULT; 505 506 return 0; 507 } 508 509 /* Query device for its ethtool_link_settings. */ 510 static int ethtool_get_link_ksettings(struct net_device *dev, 511 void __user *useraddr) 512 { 513 int err = 0; 514 struct ethtool_link_ksettings link_ksettings; 515 516 ASSERT_RTNL(); 517 if (!dev->ethtool_ops->get_link_ksettings) 518 return -EOPNOTSUPP; 519 520 /* handle bitmap nbits handshake */ 521 if (copy_from_user(&link_ksettings.base, useraddr, 522 sizeof(link_ksettings.base))) 523 return -EFAULT; 524 525 if (__ETHTOOL_LINK_MODE_MASK_NU32 526 != link_ksettings.base.link_mode_masks_nwords) { 527 /* wrong link mode nbits requested */ 528 memset(&link_ksettings, 0, sizeof(link_ksettings)); 529 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 530 /* send back number of words required as negative val */ 531 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX, 532 "need too many bits for link modes!"); 533 link_ksettings.base.link_mode_masks_nwords 534 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32); 535 536 /* copy the base fields back to user, not the link 537 * mode bitmaps 538 */ 539 if (copy_to_user(useraddr, &link_ksettings.base, 540 sizeof(link_ksettings.base))) 541 return -EFAULT; 542 543 return 0; 544 } 545 546 /* handshake successful: user/kernel agree on 547 * link_mode_masks_nwords 548 */ 549 550 memset(&link_ksettings, 0, sizeof(link_ksettings)); 551 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 552 if (err < 0) 553 return err; 554 555 /* make sure we tell the right values to user */ 556 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 557 link_ksettings.base.link_mode_masks_nwords 558 = __ETHTOOL_LINK_MODE_MASK_NU32; 559 link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED; 560 link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 561 562 return store_link_ksettings_for_user(useraddr, &link_ksettings); 563 } 564 565 /* Update device ethtool_link_settings. */ 566 static int ethtool_set_link_ksettings(struct net_device *dev, 567 void __user *useraddr) 568 { 569 int err; 570 struct ethtool_link_ksettings link_ksettings; 571 572 ASSERT_RTNL(); 573 574 if (!dev->ethtool_ops->set_link_ksettings) 575 return -EOPNOTSUPP; 576 577 /* make sure nbits field has expected value */ 578 if (copy_from_user(&link_ksettings.base, useraddr, 579 sizeof(link_ksettings.base))) 580 return -EFAULT; 581 582 if (__ETHTOOL_LINK_MODE_MASK_NU32 583 != link_ksettings.base.link_mode_masks_nwords) 584 return -EINVAL; 585 586 /* copy the whole structure, now that we know it has expected 587 * format 588 */ 589 err = load_link_ksettings_from_user(&link_ksettings, useraddr); 590 if (err) 591 return err; 592 593 /* re-check nwords field, just in case */ 594 if (__ETHTOOL_LINK_MODE_MASK_NU32 595 != link_ksettings.base.link_mode_masks_nwords) 596 return -EINVAL; 597 598 if (link_ksettings.base.master_slave_cfg || 599 link_ksettings.base.master_slave_state) 600 return -EINVAL; 601 602 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 603 if (err >= 0) { 604 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 605 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 606 } 607 return err; 608 } 609 610 int ethtool_virtdev_set_link_ksettings(struct net_device *dev, 611 const struct ethtool_link_ksettings *cmd, 612 u32 *dev_speed, u8 *dev_duplex) 613 { 614 u32 speed; 615 u8 duplex; 616 617 speed = cmd->base.speed; 618 duplex = cmd->base.duplex; 619 /* don't allow custom speed and duplex */ 620 if (!ethtool_validate_speed(speed) || 621 !ethtool_validate_duplex(duplex) || 622 !ethtool_virtdev_validate_cmd(cmd)) 623 return -EINVAL; 624 *dev_speed = speed; 625 *dev_duplex = duplex; 626 627 return 0; 628 } 629 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings); 630 631 /* Query device for its ethtool_cmd settings. 632 * 633 * Backward compatibility note: for compatibility with legacy ethtool, this is 634 * now implemented via get_link_ksettings. When driver reports higher link mode 635 * bits, a kernel warning is logged once (with name of 1st driver/device) to 636 * recommend user to upgrade ethtool, but the command is successful (only the 637 * lower link mode bits reported back to user). Deprecated fields from 638 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero. 639 */ 640 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) 641 { 642 struct ethtool_link_ksettings link_ksettings; 643 struct ethtool_cmd cmd; 644 int err; 645 646 ASSERT_RTNL(); 647 if (!dev->ethtool_ops->get_link_ksettings) 648 return -EOPNOTSUPP; 649 650 memset(&link_ksettings, 0, sizeof(link_ksettings)); 651 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 652 if (err < 0) 653 return err; 654 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings); 655 656 /* send a sensible cmd tag back to user */ 657 cmd.cmd = ETHTOOL_GSET; 658 659 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 660 return -EFAULT; 661 662 return 0; 663 } 664 665 /* Update device link settings with given ethtool_cmd. 666 * 667 * Backward compatibility note: for compatibility with legacy ethtool, this is 668 * now always implemented via set_link_settings. When user's request updates 669 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel 670 * warning is logged once (with name of 1st driver/device) to recommend user to 671 * upgrade ethtool, and the request is rejected. 672 */ 673 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) 674 { 675 struct ethtool_link_ksettings link_ksettings; 676 struct ethtool_cmd cmd; 677 int ret; 678 679 ASSERT_RTNL(); 680 681 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 682 return -EFAULT; 683 if (!dev->ethtool_ops->set_link_ksettings) 684 return -EOPNOTSUPP; 685 686 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd)) 687 return -EINVAL; 688 link_ksettings.base.link_mode_masks_nwords = 689 __ETHTOOL_LINK_MODE_MASK_NU32; 690 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 691 if (ret >= 0) { 692 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 693 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 694 } 695 return ret; 696 } 697 698 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev, 699 void __user *useraddr) 700 { 701 struct ethtool_drvinfo info; 702 const struct ethtool_ops *ops = dev->ethtool_ops; 703 704 memset(&info, 0, sizeof(info)); 705 info.cmd = ETHTOOL_GDRVINFO; 706 strlcpy(info.version, UTS_RELEASE, sizeof(info.version)); 707 if (ops->get_drvinfo) { 708 ops->get_drvinfo(dev, &info); 709 } else if (dev->dev.parent && dev->dev.parent->driver) { 710 strlcpy(info.bus_info, dev_name(dev->dev.parent), 711 sizeof(info.bus_info)); 712 strlcpy(info.driver, dev->dev.parent->driver->name, 713 sizeof(info.driver)); 714 } else { 715 return -EOPNOTSUPP; 716 } 717 718 /* 719 * this method of obtaining string set info is deprecated; 720 * Use ETHTOOL_GSSET_INFO instead. 721 */ 722 if (ops->get_sset_count) { 723 int rc; 724 725 rc = ops->get_sset_count(dev, ETH_SS_TEST); 726 if (rc >= 0) 727 info.testinfo_len = rc; 728 rc = ops->get_sset_count(dev, ETH_SS_STATS); 729 if (rc >= 0) 730 info.n_stats = rc; 731 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); 732 if (rc >= 0) 733 info.n_priv_flags = rc; 734 } 735 if (ops->get_regs_len) { 736 int ret = ops->get_regs_len(dev); 737 738 if (ret > 0) 739 info.regdump_len = ret; 740 } 741 742 if (ops->get_eeprom_len) 743 info.eedump_len = ops->get_eeprom_len(dev); 744 745 if (!info.fw_version[0]) 746 devlink_compat_running_version(dev, info.fw_version, 747 sizeof(info.fw_version)); 748 749 if (copy_to_user(useraddr, &info, sizeof(info))) 750 return -EFAULT; 751 return 0; 752 } 753 754 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, 755 void __user *useraddr) 756 { 757 struct ethtool_sset_info info; 758 u64 sset_mask; 759 int i, idx = 0, n_bits = 0, ret, rc; 760 u32 *info_buf = NULL; 761 762 if (copy_from_user(&info, useraddr, sizeof(info))) 763 return -EFAULT; 764 765 /* store copy of mask, because we zero struct later on */ 766 sset_mask = info.sset_mask; 767 if (!sset_mask) 768 return 0; 769 770 /* calculate size of return buffer */ 771 n_bits = hweight64(sset_mask); 772 773 memset(&info, 0, sizeof(info)); 774 info.cmd = ETHTOOL_GSSET_INFO; 775 776 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER); 777 if (!info_buf) 778 return -ENOMEM; 779 780 /* 781 * fill return buffer based on input bitmask and successful 782 * get_sset_count return 783 */ 784 for (i = 0; i < 64; i++) { 785 if (!(sset_mask & (1ULL << i))) 786 continue; 787 788 rc = __ethtool_get_sset_count(dev, i); 789 if (rc >= 0) { 790 info.sset_mask |= (1ULL << i); 791 info_buf[idx++] = rc; 792 } 793 } 794 795 ret = -EFAULT; 796 if (copy_to_user(useraddr, &info, sizeof(info))) 797 goto out; 798 799 useraddr += offsetof(struct ethtool_sset_info, data); 800 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32))) 801 goto out; 802 803 ret = 0; 804 805 out: 806 kfree(info_buf); 807 return ret; 808 } 809 810 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, 811 u32 cmd, void __user *useraddr) 812 { 813 struct ethtool_rxnfc info; 814 size_t info_size = sizeof(info); 815 int rc; 816 817 if (!dev->ethtool_ops->set_rxnfc) 818 return -EOPNOTSUPP; 819 820 /* struct ethtool_rxnfc was originally defined for 821 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 822 * members. User-space might still be using that 823 * definition. */ 824 if (cmd == ETHTOOL_SRXFH) 825 info_size = (offsetof(struct ethtool_rxnfc, data) + 826 sizeof(info.data)); 827 828 if (copy_from_user(&info, useraddr, info_size)) 829 return -EFAULT; 830 831 rc = dev->ethtool_ops->set_rxnfc(dev, &info); 832 if (rc) 833 return rc; 834 835 if (cmd == ETHTOOL_SRXCLSRLINS && 836 copy_to_user(useraddr, &info, info_size)) 837 return -EFAULT; 838 839 return 0; 840 } 841 842 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 843 u32 cmd, void __user *useraddr) 844 { 845 struct ethtool_rxnfc info; 846 size_t info_size = sizeof(info); 847 const struct ethtool_ops *ops = dev->ethtool_ops; 848 int ret; 849 void *rule_buf = NULL; 850 851 if (!ops->get_rxnfc) 852 return -EOPNOTSUPP; 853 854 /* struct ethtool_rxnfc was originally defined for 855 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 856 * members. User-space might still be using that 857 * definition. */ 858 if (cmd == ETHTOOL_GRXFH) 859 info_size = (offsetof(struct ethtool_rxnfc, data) + 860 sizeof(info.data)); 861 862 if (copy_from_user(&info, useraddr, info_size)) 863 return -EFAULT; 864 865 /* If FLOW_RSS was requested then user-space must be using the 866 * new definition, as FLOW_RSS is newer. 867 */ 868 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) { 869 info_size = sizeof(info); 870 if (copy_from_user(&info, useraddr, info_size)) 871 return -EFAULT; 872 /* Since malicious users may modify the original data, 873 * we need to check whether FLOW_RSS is still requested. 874 */ 875 if (!(info.flow_type & FLOW_RSS)) 876 return -EINVAL; 877 } 878 879 if (info.cmd != cmd) 880 return -EINVAL; 881 882 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 883 if (info.rule_cnt > 0) { 884 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 885 rule_buf = kcalloc(info.rule_cnt, sizeof(u32), 886 GFP_USER); 887 if (!rule_buf) 888 return -ENOMEM; 889 } 890 } 891 892 ret = ops->get_rxnfc(dev, &info, rule_buf); 893 if (ret < 0) 894 goto err_out; 895 896 ret = -EFAULT; 897 if (copy_to_user(useraddr, &info, info_size)) 898 goto err_out; 899 900 if (rule_buf) { 901 useraddr += offsetof(struct ethtool_rxnfc, rule_locs); 902 if (copy_to_user(useraddr, rule_buf, 903 info.rule_cnt * sizeof(u32))) 904 goto err_out; 905 } 906 ret = 0; 907 908 err_out: 909 kfree(rule_buf); 910 911 return ret; 912 } 913 914 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 915 struct ethtool_rxnfc *rx_rings, 916 u32 size) 917 { 918 int i; 919 920 if (copy_from_user(indir, useraddr, size * sizeof(indir[0]))) 921 return -EFAULT; 922 923 /* Validate ring indices */ 924 for (i = 0; i < size; i++) 925 if (indir[i] >= rx_rings->data) 926 return -EINVAL; 927 928 return 0; 929 } 930 931 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; 932 933 void netdev_rss_key_fill(void *buffer, size_t len) 934 { 935 BUG_ON(len > sizeof(netdev_rss_key)); 936 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 937 memcpy(buffer, netdev_rss_key, len); 938 } 939 EXPORT_SYMBOL(netdev_rss_key_fill); 940 941 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 942 void __user *useraddr) 943 { 944 u32 user_size, dev_size; 945 u32 *indir; 946 int ret; 947 948 if (!dev->ethtool_ops->get_rxfh_indir_size || 949 !dev->ethtool_ops->get_rxfh) 950 return -EOPNOTSUPP; 951 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 952 if (dev_size == 0) 953 return -EOPNOTSUPP; 954 955 if (copy_from_user(&user_size, 956 useraddr + offsetof(struct ethtool_rxfh_indir, size), 957 sizeof(user_size))) 958 return -EFAULT; 959 960 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 961 &dev_size, sizeof(dev_size))) 962 return -EFAULT; 963 964 /* If the user buffer size is 0, this is just a query for the 965 * device table size. Otherwise, if it's smaller than the 966 * device table size it's an error. 967 */ 968 if (user_size < dev_size) 969 return user_size == 0 ? 0 : -EINVAL; 970 971 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 972 if (!indir) 973 return -ENOMEM; 974 975 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL); 976 if (ret) 977 goto out; 978 979 if (copy_to_user(useraddr + 980 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 981 indir, dev_size * sizeof(indir[0]))) 982 ret = -EFAULT; 983 984 out: 985 kfree(indir); 986 return ret; 987 } 988 989 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 990 void __user *useraddr) 991 { 992 struct ethtool_rxnfc rx_rings; 993 u32 user_size, dev_size, i; 994 u32 *indir; 995 const struct ethtool_ops *ops = dev->ethtool_ops; 996 int ret; 997 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 998 999 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 1000 !ops->get_rxnfc) 1001 return -EOPNOTSUPP; 1002 1003 dev_size = ops->get_rxfh_indir_size(dev); 1004 if (dev_size == 0) 1005 return -EOPNOTSUPP; 1006 1007 if (copy_from_user(&user_size, 1008 useraddr + offsetof(struct ethtool_rxfh_indir, size), 1009 sizeof(user_size))) 1010 return -EFAULT; 1011 1012 if (user_size != 0 && user_size != dev_size) 1013 return -EINVAL; 1014 1015 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 1016 if (!indir) 1017 return -ENOMEM; 1018 1019 rx_rings.cmd = ETHTOOL_GRXRINGS; 1020 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1021 if (ret) 1022 goto out; 1023 1024 if (user_size == 0) { 1025 for (i = 0; i < dev_size; i++) 1026 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1027 } else { 1028 ret = ethtool_copy_validate_indir(indir, 1029 useraddr + ringidx_offset, 1030 &rx_rings, 1031 dev_size); 1032 if (ret) 1033 goto out; 1034 } 1035 1036 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE); 1037 if (ret) 1038 goto out; 1039 1040 /* indicate whether rxfh was set to default */ 1041 if (user_size == 0) 1042 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1043 else 1044 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1045 1046 out: 1047 kfree(indir); 1048 return ret; 1049 } 1050 1051 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 1052 void __user *useraddr) 1053 { 1054 int ret; 1055 const struct ethtool_ops *ops = dev->ethtool_ops; 1056 u32 user_indir_size, user_key_size; 1057 u32 dev_indir_size = 0, dev_key_size = 0; 1058 struct ethtool_rxfh rxfh; 1059 u32 total_size; 1060 u32 indir_bytes; 1061 u32 *indir = NULL; 1062 u8 dev_hfunc = 0; 1063 u8 *hkey = NULL; 1064 u8 *rss_config; 1065 1066 if (!ops->get_rxfh) 1067 return -EOPNOTSUPP; 1068 1069 if (ops->get_rxfh_indir_size) 1070 dev_indir_size = ops->get_rxfh_indir_size(dev); 1071 if (ops->get_rxfh_key_size) 1072 dev_key_size = ops->get_rxfh_key_size(dev); 1073 1074 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1075 return -EFAULT; 1076 user_indir_size = rxfh.indir_size; 1077 user_key_size = rxfh.key_size; 1078 1079 /* Check that reserved fields are 0 for now */ 1080 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1081 return -EINVAL; 1082 /* Most drivers don't handle rss_context, check it's 0 as well */ 1083 if (rxfh.rss_context && !ops->get_rxfh_context) 1084 return -EOPNOTSUPP; 1085 1086 rxfh.indir_size = dev_indir_size; 1087 rxfh.key_size = dev_key_size; 1088 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1089 return -EFAULT; 1090 1091 if ((user_indir_size && (user_indir_size != dev_indir_size)) || 1092 (user_key_size && (user_key_size != dev_key_size))) 1093 return -EINVAL; 1094 1095 indir_bytes = user_indir_size * sizeof(indir[0]); 1096 total_size = indir_bytes + user_key_size; 1097 rss_config = kzalloc(total_size, GFP_USER); 1098 if (!rss_config) 1099 return -ENOMEM; 1100 1101 if (user_indir_size) 1102 indir = (u32 *)rss_config; 1103 1104 if (user_key_size) 1105 hkey = rss_config + indir_bytes; 1106 1107 if (rxfh.rss_context) 1108 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey, 1109 &dev_hfunc, 1110 rxfh.rss_context); 1111 else 1112 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc); 1113 if (ret) 1114 goto out; 1115 1116 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1117 &dev_hfunc, sizeof(rxfh.hfunc))) { 1118 ret = -EFAULT; 1119 } else if (copy_to_user(useraddr + 1120 offsetof(struct ethtool_rxfh, rss_config[0]), 1121 rss_config, total_size)) { 1122 ret = -EFAULT; 1123 } 1124 out: 1125 kfree(rss_config); 1126 1127 return ret; 1128 } 1129 1130 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1131 void __user *useraddr) 1132 { 1133 int ret; 1134 const struct ethtool_ops *ops = dev->ethtool_ops; 1135 struct ethtool_rxnfc rx_rings; 1136 struct ethtool_rxfh rxfh; 1137 u32 dev_indir_size = 0, dev_key_size = 0, i; 1138 u32 *indir = NULL, indir_bytes = 0; 1139 u8 *hkey = NULL; 1140 u8 *rss_config; 1141 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1142 bool delete = false; 1143 1144 if (!ops->get_rxnfc || !ops->set_rxfh) 1145 return -EOPNOTSUPP; 1146 1147 if (ops->get_rxfh_indir_size) 1148 dev_indir_size = ops->get_rxfh_indir_size(dev); 1149 if (ops->get_rxfh_key_size) 1150 dev_key_size = ops->get_rxfh_key_size(dev); 1151 1152 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1153 return -EFAULT; 1154 1155 /* Check that reserved fields are 0 for now */ 1156 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1157 return -EINVAL; 1158 /* Most drivers don't handle rss_context, check it's 0 as well */ 1159 if (rxfh.rss_context && !ops->set_rxfh_context) 1160 return -EOPNOTSUPP; 1161 1162 /* If either indir, hash key or function is valid, proceed further. 1163 * Must request at least one change: indir size, hash key or function. 1164 */ 1165 if ((rxfh.indir_size && 1166 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1167 rxfh.indir_size != dev_indir_size) || 1168 (rxfh.key_size && (rxfh.key_size != dev_key_size)) || 1169 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1170 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE)) 1171 return -EINVAL; 1172 1173 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1174 indir_bytes = dev_indir_size * sizeof(indir[0]); 1175 1176 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER); 1177 if (!rss_config) 1178 return -ENOMEM; 1179 1180 rx_rings.cmd = ETHTOOL_GRXRINGS; 1181 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1182 if (ret) 1183 goto out; 1184 1185 /* rxfh.indir_size == 0 means reset the indir table to default (master 1186 * context) or delete the context (other RSS contexts). 1187 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1188 */ 1189 if (rxfh.indir_size && 1190 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1191 indir = (u32 *)rss_config; 1192 ret = ethtool_copy_validate_indir(indir, 1193 useraddr + rss_cfg_offset, 1194 &rx_rings, 1195 rxfh.indir_size); 1196 if (ret) 1197 goto out; 1198 } else if (rxfh.indir_size == 0) { 1199 if (rxfh.rss_context == 0) { 1200 indir = (u32 *)rss_config; 1201 for (i = 0; i < dev_indir_size; i++) 1202 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1203 } else { 1204 delete = true; 1205 } 1206 } 1207 1208 if (rxfh.key_size) { 1209 hkey = rss_config + indir_bytes; 1210 if (copy_from_user(hkey, 1211 useraddr + rss_cfg_offset + indir_bytes, 1212 rxfh.key_size)) { 1213 ret = -EFAULT; 1214 goto out; 1215 } 1216 } 1217 1218 if (rxfh.rss_context) 1219 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc, 1220 &rxfh.rss_context, delete); 1221 else 1222 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc); 1223 if (ret) 1224 goto out; 1225 1226 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1227 &rxfh.rss_context, sizeof(rxfh.rss_context))) 1228 ret = -EFAULT; 1229 1230 if (!rxfh.rss_context) { 1231 /* indicate whether rxfh was set to default */ 1232 if (rxfh.indir_size == 0) 1233 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1234 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1235 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1236 } 1237 1238 out: 1239 kfree(rss_config); 1240 return ret; 1241 } 1242 1243 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1244 { 1245 struct ethtool_regs regs; 1246 const struct ethtool_ops *ops = dev->ethtool_ops; 1247 void *regbuf; 1248 int reglen, ret; 1249 1250 if (!ops->get_regs || !ops->get_regs_len) 1251 return -EOPNOTSUPP; 1252 1253 if (copy_from_user(®s, useraddr, sizeof(regs))) 1254 return -EFAULT; 1255 1256 reglen = ops->get_regs_len(dev); 1257 if (reglen <= 0) 1258 return reglen; 1259 1260 if (regs.len > reglen) 1261 regs.len = reglen; 1262 1263 regbuf = vzalloc(reglen); 1264 if (!regbuf) 1265 return -ENOMEM; 1266 1267 if (regs.len < reglen) 1268 reglen = regs.len; 1269 1270 ops->get_regs(dev, ®s, regbuf); 1271 1272 ret = -EFAULT; 1273 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1274 goto out; 1275 useraddr += offsetof(struct ethtool_regs, data); 1276 if (copy_to_user(useraddr, regbuf, reglen)) 1277 goto out; 1278 ret = 0; 1279 1280 out: 1281 vfree(regbuf); 1282 return ret; 1283 } 1284 1285 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1286 { 1287 struct ethtool_value reset; 1288 int ret; 1289 1290 if (!dev->ethtool_ops->reset) 1291 return -EOPNOTSUPP; 1292 1293 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1294 return -EFAULT; 1295 1296 ret = dev->ethtool_ops->reset(dev, &reset.data); 1297 if (ret) 1298 return ret; 1299 1300 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1301 return -EFAULT; 1302 return 0; 1303 } 1304 1305 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1306 { 1307 struct ethtool_wolinfo wol; 1308 1309 if (!dev->ethtool_ops->get_wol) 1310 return -EOPNOTSUPP; 1311 1312 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1313 wol.cmd = ETHTOOL_GWOL; 1314 dev->ethtool_ops->get_wol(dev, &wol); 1315 1316 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1317 return -EFAULT; 1318 return 0; 1319 } 1320 1321 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1322 { 1323 struct ethtool_wolinfo wol; 1324 int ret; 1325 1326 if (!dev->ethtool_ops->set_wol) 1327 return -EOPNOTSUPP; 1328 1329 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1330 return -EFAULT; 1331 1332 ret = dev->ethtool_ops->set_wol(dev, &wol); 1333 if (ret) 1334 return ret; 1335 1336 dev->wol_enabled = !!wol.wolopts; 1337 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 1338 1339 return 0; 1340 } 1341 1342 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1343 { 1344 struct ethtool_eee edata; 1345 int rc; 1346 1347 if (!dev->ethtool_ops->get_eee) 1348 return -EOPNOTSUPP; 1349 1350 memset(&edata, 0, sizeof(struct ethtool_eee)); 1351 edata.cmd = ETHTOOL_GEEE; 1352 rc = dev->ethtool_ops->get_eee(dev, &edata); 1353 1354 if (rc) 1355 return rc; 1356 1357 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1358 return -EFAULT; 1359 1360 return 0; 1361 } 1362 1363 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1364 { 1365 struct ethtool_eee edata; 1366 int ret; 1367 1368 if (!dev->ethtool_ops->set_eee) 1369 return -EOPNOTSUPP; 1370 1371 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1372 return -EFAULT; 1373 1374 ret = dev->ethtool_ops->set_eee(dev, &edata); 1375 if (!ret) 1376 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL); 1377 return ret; 1378 } 1379 1380 static int ethtool_nway_reset(struct net_device *dev) 1381 { 1382 if (!dev->ethtool_ops->nway_reset) 1383 return -EOPNOTSUPP; 1384 1385 return dev->ethtool_ops->nway_reset(dev); 1386 } 1387 1388 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1389 { 1390 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1391 int link = __ethtool_get_link(dev); 1392 1393 if (link < 0) 1394 return link; 1395 1396 edata.data = link; 1397 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1398 return -EFAULT; 1399 return 0; 1400 } 1401 1402 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1403 int (*getter)(struct net_device *, 1404 struct ethtool_eeprom *, u8 *), 1405 u32 total_len) 1406 { 1407 struct ethtool_eeprom eeprom; 1408 void __user *userbuf = useraddr + sizeof(eeprom); 1409 u32 bytes_remaining; 1410 u8 *data; 1411 int ret = 0; 1412 1413 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1414 return -EFAULT; 1415 1416 /* Check for wrap and zero */ 1417 if (eeprom.offset + eeprom.len <= eeprom.offset) 1418 return -EINVAL; 1419 1420 /* Check for exceeding total eeprom len */ 1421 if (eeprom.offset + eeprom.len > total_len) 1422 return -EINVAL; 1423 1424 data = kmalloc(PAGE_SIZE, GFP_USER); 1425 if (!data) 1426 return -ENOMEM; 1427 1428 bytes_remaining = eeprom.len; 1429 while (bytes_remaining > 0) { 1430 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1431 1432 ret = getter(dev, &eeprom, data); 1433 if (ret) 1434 break; 1435 if (copy_to_user(userbuf, data, eeprom.len)) { 1436 ret = -EFAULT; 1437 break; 1438 } 1439 userbuf += eeprom.len; 1440 eeprom.offset += eeprom.len; 1441 bytes_remaining -= eeprom.len; 1442 } 1443 1444 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1445 eeprom.offset -= eeprom.len; 1446 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1447 ret = -EFAULT; 1448 1449 kfree(data); 1450 return ret; 1451 } 1452 1453 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1454 { 1455 const struct ethtool_ops *ops = dev->ethtool_ops; 1456 1457 if (!ops->get_eeprom || !ops->get_eeprom_len || 1458 !ops->get_eeprom_len(dev)) 1459 return -EOPNOTSUPP; 1460 1461 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1462 ops->get_eeprom_len(dev)); 1463 } 1464 1465 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1466 { 1467 struct ethtool_eeprom eeprom; 1468 const struct ethtool_ops *ops = dev->ethtool_ops; 1469 void __user *userbuf = useraddr + sizeof(eeprom); 1470 u32 bytes_remaining; 1471 u8 *data; 1472 int ret = 0; 1473 1474 if (!ops->set_eeprom || !ops->get_eeprom_len || 1475 !ops->get_eeprom_len(dev)) 1476 return -EOPNOTSUPP; 1477 1478 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1479 return -EFAULT; 1480 1481 /* Check for wrap and zero */ 1482 if (eeprom.offset + eeprom.len <= eeprom.offset) 1483 return -EINVAL; 1484 1485 /* Check for exceeding total eeprom len */ 1486 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1487 return -EINVAL; 1488 1489 data = kmalloc(PAGE_SIZE, GFP_USER); 1490 if (!data) 1491 return -ENOMEM; 1492 1493 bytes_remaining = eeprom.len; 1494 while (bytes_remaining > 0) { 1495 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1496 1497 if (copy_from_user(data, userbuf, eeprom.len)) { 1498 ret = -EFAULT; 1499 break; 1500 } 1501 ret = ops->set_eeprom(dev, &eeprom, data); 1502 if (ret) 1503 break; 1504 userbuf += eeprom.len; 1505 eeprom.offset += eeprom.len; 1506 bytes_remaining -= eeprom.len; 1507 } 1508 1509 kfree(data); 1510 return ret; 1511 } 1512 1513 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1514 void __user *useraddr) 1515 { 1516 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1517 int ret; 1518 1519 if (!dev->ethtool_ops->get_coalesce) 1520 return -EOPNOTSUPP; 1521 1522 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce); 1523 if (ret) 1524 return ret; 1525 1526 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1527 return -EFAULT; 1528 return 0; 1529 } 1530 1531 static bool 1532 ethtool_set_coalesce_supported(struct net_device *dev, 1533 struct ethtool_coalesce *coalesce) 1534 { 1535 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1536 u32 nonzero_params = 0; 1537 1538 if (coalesce->rx_coalesce_usecs) 1539 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1540 if (coalesce->rx_max_coalesced_frames) 1541 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1542 if (coalesce->rx_coalesce_usecs_irq) 1543 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1544 if (coalesce->rx_max_coalesced_frames_irq) 1545 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1546 if (coalesce->tx_coalesce_usecs) 1547 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1548 if (coalesce->tx_max_coalesced_frames) 1549 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1550 if (coalesce->tx_coalesce_usecs_irq) 1551 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1552 if (coalesce->tx_max_coalesced_frames_irq) 1553 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1554 if (coalesce->stats_block_coalesce_usecs) 1555 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1556 if (coalesce->use_adaptive_rx_coalesce) 1557 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1558 if (coalesce->use_adaptive_tx_coalesce) 1559 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1560 if (coalesce->pkt_rate_low) 1561 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1562 if (coalesce->rx_coalesce_usecs_low) 1563 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1564 if (coalesce->rx_max_coalesced_frames_low) 1565 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1566 if (coalesce->tx_coalesce_usecs_low) 1567 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1568 if (coalesce->tx_max_coalesced_frames_low) 1569 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1570 if (coalesce->pkt_rate_high) 1571 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1572 if (coalesce->rx_coalesce_usecs_high) 1573 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1574 if (coalesce->rx_max_coalesced_frames_high) 1575 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1576 if (coalesce->tx_coalesce_usecs_high) 1577 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1578 if (coalesce->tx_max_coalesced_frames_high) 1579 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1580 if (coalesce->rate_sample_interval) 1581 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1582 1583 return (supported_params & nonzero_params) == nonzero_params; 1584 } 1585 1586 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1587 void __user *useraddr) 1588 { 1589 struct ethtool_coalesce coalesce; 1590 int ret; 1591 1592 if (!dev->ethtool_ops->set_coalesce) 1593 return -EOPNOTSUPP; 1594 1595 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1596 return -EFAULT; 1597 1598 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 1599 return -EOPNOTSUPP; 1600 1601 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce); 1602 if (!ret) 1603 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); 1604 return ret; 1605 } 1606 1607 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1608 { 1609 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1610 1611 if (!dev->ethtool_ops->get_ringparam) 1612 return -EOPNOTSUPP; 1613 1614 dev->ethtool_ops->get_ringparam(dev, &ringparam); 1615 1616 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1617 return -EFAULT; 1618 return 0; 1619 } 1620 1621 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1622 { 1623 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 1624 int ret; 1625 1626 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 1627 return -EOPNOTSUPP; 1628 1629 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1630 return -EFAULT; 1631 1632 dev->ethtool_ops->get_ringparam(dev, &max); 1633 1634 /* ensure new ring parameters are within the maximums */ 1635 if (ringparam.rx_pending > max.rx_max_pending || 1636 ringparam.rx_mini_pending > max.rx_mini_max_pending || 1637 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 1638 ringparam.tx_pending > max.tx_max_pending) 1639 return -EINVAL; 1640 1641 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam); 1642 if (!ret) 1643 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 1644 return ret; 1645 } 1646 1647 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1648 void __user *useraddr) 1649 { 1650 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1651 1652 if (!dev->ethtool_ops->get_channels) 1653 return -EOPNOTSUPP; 1654 1655 dev->ethtool_ops->get_channels(dev, &channels); 1656 1657 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1658 return -EFAULT; 1659 return 0; 1660 } 1661 1662 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1663 void __user *useraddr) 1664 { 1665 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 1666 u16 from_channel, to_channel; 1667 u32 max_rx_in_use = 0; 1668 unsigned int i; 1669 int ret; 1670 1671 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 1672 return -EOPNOTSUPP; 1673 1674 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1675 return -EFAULT; 1676 1677 dev->ethtool_ops->get_channels(dev, &curr); 1678 1679 if (channels.rx_count == curr.rx_count && 1680 channels.tx_count == curr.tx_count && 1681 channels.combined_count == curr.combined_count && 1682 channels.other_count == curr.other_count) 1683 return 0; 1684 1685 /* ensure new counts are within the maximums */ 1686 if (channels.rx_count > curr.max_rx || 1687 channels.tx_count > curr.max_tx || 1688 channels.combined_count > curr.max_combined || 1689 channels.other_count > curr.max_other) 1690 return -EINVAL; 1691 1692 /* ensure there is at least one RX and one TX channel */ 1693 if (!channels.combined_count && 1694 (!channels.rx_count || !channels.tx_count)) 1695 return -EINVAL; 1696 1697 /* ensure the new Rx count fits within the configured Rx flow 1698 * indirection table settings */ 1699 if (netif_is_rxfh_configured(dev) && 1700 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) && 1701 (channels.combined_count + channels.rx_count) <= max_rx_in_use) 1702 return -EINVAL; 1703 1704 /* Disabling channels, query zero-copy AF_XDP sockets */ 1705 from_channel = channels.combined_count + 1706 min(channels.rx_count, channels.tx_count); 1707 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 1708 for (i = from_channel; i < to_channel; i++) 1709 if (xdp_get_umem_from_qid(dev, i)) 1710 return -EINVAL; 1711 1712 ret = dev->ethtool_ops->set_channels(dev, &channels); 1713 if (!ret) 1714 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 1715 return ret; 1716 } 1717 1718 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1719 { 1720 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 1721 1722 if (!dev->ethtool_ops->get_pauseparam) 1723 return -EOPNOTSUPP; 1724 1725 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1726 1727 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1728 return -EFAULT; 1729 return 0; 1730 } 1731 1732 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1733 { 1734 struct ethtool_pauseparam pauseparam; 1735 int ret; 1736 1737 if (!dev->ethtool_ops->set_pauseparam) 1738 return -EOPNOTSUPP; 1739 1740 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1741 return -EFAULT; 1742 1743 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1744 if (!ret) 1745 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); 1746 return ret; 1747 } 1748 1749 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1750 { 1751 struct ethtool_test test; 1752 const struct ethtool_ops *ops = dev->ethtool_ops; 1753 u64 *data; 1754 int ret, test_len; 1755 1756 if (!ops->self_test || !ops->get_sset_count) 1757 return -EOPNOTSUPP; 1758 1759 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1760 if (test_len < 0) 1761 return test_len; 1762 WARN_ON(test_len == 0); 1763 1764 if (copy_from_user(&test, useraddr, sizeof(test))) 1765 return -EFAULT; 1766 1767 test.len = test_len; 1768 data = kmalloc_array(test_len, sizeof(u64), GFP_USER); 1769 if (!data) 1770 return -ENOMEM; 1771 1772 netif_testing_on(dev); 1773 ops->self_test(dev, &test, data); 1774 netif_testing_off(dev); 1775 1776 ret = -EFAULT; 1777 if (copy_to_user(useraddr, &test, sizeof(test))) 1778 goto out; 1779 useraddr += sizeof(test); 1780 if (copy_to_user(useraddr, data, test.len * sizeof(u64))) 1781 goto out; 1782 ret = 0; 1783 1784 out: 1785 kfree(data); 1786 return ret; 1787 } 1788 1789 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1790 { 1791 struct ethtool_gstrings gstrings; 1792 u8 *data; 1793 int ret; 1794 1795 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1796 return -EFAULT; 1797 1798 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1799 if (ret < 0) 1800 return ret; 1801 if (ret > S32_MAX / ETH_GSTRING_LEN) 1802 return -ENOMEM; 1803 WARN_ON_ONCE(!ret); 1804 1805 gstrings.len = ret; 1806 1807 if (gstrings.len) { 1808 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 1809 if (!data) 1810 return -ENOMEM; 1811 1812 __ethtool_get_strings(dev, gstrings.string_set, data); 1813 } else { 1814 data = NULL; 1815 } 1816 1817 ret = -EFAULT; 1818 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1819 goto out; 1820 useraddr += sizeof(gstrings); 1821 if (gstrings.len && 1822 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) 1823 goto out; 1824 ret = 0; 1825 1826 out: 1827 vfree(data); 1828 return ret; 1829 } 1830 1831 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 1832 { 1833 struct ethtool_value id; 1834 static bool busy; 1835 const struct ethtool_ops *ops = dev->ethtool_ops; 1836 int rc; 1837 1838 if (!ops->set_phys_id) 1839 return -EOPNOTSUPP; 1840 1841 if (busy) 1842 return -EBUSY; 1843 1844 if (copy_from_user(&id, useraddr, sizeof(id))) 1845 return -EFAULT; 1846 1847 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 1848 if (rc < 0) 1849 return rc; 1850 1851 /* Drop the RTNL lock while waiting, but prevent reentry or 1852 * removal of the device. 1853 */ 1854 busy = true; 1855 dev_hold(dev); 1856 rtnl_unlock(); 1857 1858 if (rc == 0) { 1859 /* Driver will handle this itself */ 1860 schedule_timeout_interruptible( 1861 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 1862 } else { 1863 /* Driver expects to be called at twice the frequency in rc */ 1864 int n = rc * 2, i, interval = HZ / n; 1865 1866 /* Count down seconds */ 1867 do { 1868 /* Count down iterations per second */ 1869 i = n; 1870 do { 1871 rtnl_lock(); 1872 rc = ops->set_phys_id(dev, 1873 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 1874 rtnl_unlock(); 1875 if (rc) 1876 break; 1877 schedule_timeout_interruptible(interval); 1878 } while (!signal_pending(current) && --i != 0); 1879 } while (!signal_pending(current) && 1880 (id.data == 0 || --id.data != 0)); 1881 } 1882 1883 rtnl_lock(); 1884 dev_put(dev); 1885 busy = false; 1886 1887 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 1888 return rc; 1889 } 1890 1891 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 1892 { 1893 struct ethtool_stats stats; 1894 const struct ethtool_ops *ops = dev->ethtool_ops; 1895 u64 *data; 1896 int ret, n_stats; 1897 1898 if (!ops->get_ethtool_stats || !ops->get_sset_count) 1899 return -EOPNOTSUPP; 1900 1901 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 1902 if (n_stats < 0) 1903 return n_stats; 1904 if (n_stats > S32_MAX / sizeof(u64)) 1905 return -ENOMEM; 1906 WARN_ON_ONCE(!n_stats); 1907 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1908 return -EFAULT; 1909 1910 stats.n_stats = n_stats; 1911 1912 if (n_stats) { 1913 data = vzalloc(array_size(n_stats, sizeof(u64))); 1914 if (!data) 1915 return -ENOMEM; 1916 ops->get_ethtool_stats(dev, &stats, data); 1917 } else { 1918 data = NULL; 1919 } 1920 1921 ret = -EFAULT; 1922 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1923 goto out; 1924 useraddr += sizeof(stats); 1925 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64)))) 1926 goto out; 1927 ret = 0; 1928 1929 out: 1930 vfree(data); 1931 return ret; 1932 } 1933 1934 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 1935 { 1936 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 1937 const struct ethtool_ops *ops = dev->ethtool_ops; 1938 struct phy_device *phydev = dev->phydev; 1939 struct ethtool_stats stats; 1940 u64 *data; 1941 int ret, n_stats; 1942 1943 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count)) 1944 return -EOPNOTSUPP; 1945 1946 if (dev->phydev && !ops->get_ethtool_phy_stats && 1947 phy_ops && phy_ops->get_sset_count) 1948 n_stats = phy_ops->get_sset_count(dev->phydev); 1949 else 1950 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 1951 if (n_stats < 0) 1952 return n_stats; 1953 if (n_stats > S32_MAX / sizeof(u64)) 1954 return -ENOMEM; 1955 WARN_ON_ONCE(!n_stats); 1956 1957 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1958 return -EFAULT; 1959 1960 stats.n_stats = n_stats; 1961 1962 if (n_stats) { 1963 data = vzalloc(array_size(n_stats, sizeof(u64))); 1964 if (!data) 1965 return -ENOMEM; 1966 1967 if (dev->phydev && !ops->get_ethtool_phy_stats && 1968 phy_ops && phy_ops->get_stats) { 1969 ret = phy_ops->get_stats(dev->phydev, &stats, data); 1970 if (ret < 0) 1971 goto out; 1972 } else { 1973 ops->get_ethtool_phy_stats(dev, &stats, data); 1974 } 1975 } else { 1976 data = NULL; 1977 } 1978 1979 ret = -EFAULT; 1980 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1981 goto out; 1982 useraddr += sizeof(stats); 1983 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64)))) 1984 goto out; 1985 ret = 0; 1986 1987 out: 1988 vfree(data); 1989 return ret; 1990 } 1991 1992 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 1993 { 1994 struct ethtool_perm_addr epaddr; 1995 1996 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 1997 return -EFAULT; 1998 1999 if (epaddr.size < dev->addr_len) 2000 return -ETOOSMALL; 2001 epaddr.size = dev->addr_len; 2002 2003 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 2004 return -EFAULT; 2005 useraddr += sizeof(epaddr); 2006 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 2007 return -EFAULT; 2008 return 0; 2009 } 2010 2011 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 2012 u32 cmd, u32 (*actor)(struct net_device *)) 2013 { 2014 struct ethtool_value edata = { .cmd = cmd }; 2015 2016 if (!actor) 2017 return -EOPNOTSUPP; 2018 2019 edata.data = actor(dev); 2020 2021 if (copy_to_user(useraddr, &edata, sizeof(edata))) 2022 return -EFAULT; 2023 return 0; 2024 } 2025 2026 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 2027 void (*actor)(struct net_device *, u32)) 2028 { 2029 struct ethtool_value edata; 2030 2031 if (!actor) 2032 return -EOPNOTSUPP; 2033 2034 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2035 return -EFAULT; 2036 2037 actor(dev, edata.data); 2038 return 0; 2039 } 2040 2041 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2042 int (*actor)(struct net_device *, u32)) 2043 { 2044 struct ethtool_value edata; 2045 2046 if (!actor) 2047 return -EOPNOTSUPP; 2048 2049 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2050 return -EFAULT; 2051 2052 return actor(dev, edata.data); 2053 } 2054 2055 static noinline_for_stack int ethtool_flash_device(struct net_device *dev, 2056 char __user *useraddr) 2057 { 2058 struct ethtool_flash efl; 2059 2060 if (copy_from_user(&efl, useraddr, sizeof(efl))) 2061 return -EFAULT; 2062 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 2063 2064 if (!dev->ethtool_ops->flash_device) 2065 return devlink_compat_flash_update(dev, efl.data); 2066 2067 return dev->ethtool_ops->flash_device(dev, &efl); 2068 } 2069 2070 static int ethtool_set_dump(struct net_device *dev, 2071 void __user *useraddr) 2072 { 2073 struct ethtool_dump dump; 2074 2075 if (!dev->ethtool_ops->set_dump) 2076 return -EOPNOTSUPP; 2077 2078 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2079 return -EFAULT; 2080 2081 return dev->ethtool_ops->set_dump(dev, &dump); 2082 } 2083 2084 static int ethtool_get_dump_flag(struct net_device *dev, 2085 void __user *useraddr) 2086 { 2087 int ret; 2088 struct ethtool_dump dump; 2089 const struct ethtool_ops *ops = dev->ethtool_ops; 2090 2091 if (!ops->get_dump_flag) 2092 return -EOPNOTSUPP; 2093 2094 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2095 return -EFAULT; 2096 2097 ret = ops->get_dump_flag(dev, &dump); 2098 if (ret) 2099 return ret; 2100 2101 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2102 return -EFAULT; 2103 return 0; 2104 } 2105 2106 static int ethtool_get_dump_data(struct net_device *dev, 2107 void __user *useraddr) 2108 { 2109 int ret; 2110 __u32 len; 2111 struct ethtool_dump dump, tmp; 2112 const struct ethtool_ops *ops = dev->ethtool_ops; 2113 void *data = NULL; 2114 2115 if (!ops->get_dump_data || !ops->get_dump_flag) 2116 return -EOPNOTSUPP; 2117 2118 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2119 return -EFAULT; 2120 2121 memset(&tmp, 0, sizeof(tmp)); 2122 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2123 ret = ops->get_dump_flag(dev, &tmp); 2124 if (ret) 2125 return ret; 2126 2127 len = min(tmp.len, dump.len); 2128 if (!len) 2129 return -EFAULT; 2130 2131 /* Don't ever let the driver think there's more space available 2132 * than it requested with .get_dump_flag(). 2133 */ 2134 dump.len = len; 2135 2136 /* Always allocate enough space to hold the whole thing so that the 2137 * driver does not need to check the length and bother with partial 2138 * dumping. 2139 */ 2140 data = vzalloc(tmp.len); 2141 if (!data) 2142 return -ENOMEM; 2143 ret = ops->get_dump_data(dev, &dump, data); 2144 if (ret) 2145 goto out; 2146 2147 /* There are two sane possibilities: 2148 * 1. The driver's .get_dump_data() does not touch dump.len. 2149 * 2. Or it may set dump.len to how much it really writes, which 2150 * should be tmp.len (or len if it can do a partial dump). 2151 * In any case respond to userspace with the actual length of data 2152 * it's receiving. 2153 */ 2154 WARN_ON(dump.len != len && dump.len != tmp.len); 2155 dump.len = len; 2156 2157 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2158 ret = -EFAULT; 2159 goto out; 2160 } 2161 useraddr += offsetof(struct ethtool_dump, data); 2162 if (copy_to_user(useraddr, data, len)) 2163 ret = -EFAULT; 2164 out: 2165 vfree(data); 2166 return ret; 2167 } 2168 2169 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2170 { 2171 struct ethtool_ts_info info; 2172 int err; 2173 2174 err = __ethtool_get_ts_info(dev, &info); 2175 if (err) 2176 return err; 2177 2178 if (copy_to_user(useraddr, &info, sizeof(info))) 2179 return -EFAULT; 2180 2181 return 0; 2182 } 2183 2184 static int __ethtool_get_module_info(struct net_device *dev, 2185 struct ethtool_modinfo *modinfo) 2186 { 2187 const struct ethtool_ops *ops = dev->ethtool_ops; 2188 struct phy_device *phydev = dev->phydev; 2189 2190 if (dev->sfp_bus) 2191 return sfp_get_module_info(dev->sfp_bus, modinfo); 2192 2193 if (phydev && phydev->drv && phydev->drv->module_info) 2194 return phydev->drv->module_info(phydev, modinfo); 2195 2196 if (ops->get_module_info) 2197 return ops->get_module_info(dev, modinfo); 2198 2199 return -EOPNOTSUPP; 2200 } 2201 2202 static int ethtool_get_module_info(struct net_device *dev, 2203 void __user *useraddr) 2204 { 2205 int ret; 2206 struct ethtool_modinfo modinfo; 2207 2208 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2209 return -EFAULT; 2210 2211 ret = __ethtool_get_module_info(dev, &modinfo); 2212 if (ret) 2213 return ret; 2214 2215 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2216 return -EFAULT; 2217 2218 return 0; 2219 } 2220 2221 static int __ethtool_get_module_eeprom(struct net_device *dev, 2222 struct ethtool_eeprom *ee, u8 *data) 2223 { 2224 const struct ethtool_ops *ops = dev->ethtool_ops; 2225 struct phy_device *phydev = dev->phydev; 2226 2227 if (dev->sfp_bus) 2228 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2229 2230 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2231 return phydev->drv->module_eeprom(phydev, ee, data); 2232 2233 if (ops->get_module_eeprom) 2234 return ops->get_module_eeprom(dev, ee, data); 2235 2236 return -EOPNOTSUPP; 2237 } 2238 2239 static int ethtool_get_module_eeprom(struct net_device *dev, 2240 void __user *useraddr) 2241 { 2242 int ret; 2243 struct ethtool_modinfo modinfo; 2244 2245 ret = __ethtool_get_module_info(dev, &modinfo); 2246 if (ret) 2247 return ret; 2248 2249 return ethtool_get_any_eeprom(dev, useraddr, 2250 __ethtool_get_module_eeprom, 2251 modinfo.eeprom_len); 2252 } 2253 2254 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2255 { 2256 switch (tuna->id) { 2257 case ETHTOOL_RX_COPYBREAK: 2258 case ETHTOOL_TX_COPYBREAK: 2259 if (tuna->len != sizeof(u32) || 2260 tuna->type_id != ETHTOOL_TUNABLE_U32) 2261 return -EINVAL; 2262 break; 2263 case ETHTOOL_PFC_PREVENTION_TOUT: 2264 if (tuna->len != sizeof(u16) || 2265 tuna->type_id != ETHTOOL_TUNABLE_U16) 2266 return -EINVAL; 2267 break; 2268 default: 2269 return -EINVAL; 2270 } 2271 2272 return 0; 2273 } 2274 2275 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2276 { 2277 int ret; 2278 struct ethtool_tunable tuna; 2279 const struct ethtool_ops *ops = dev->ethtool_ops; 2280 void *data; 2281 2282 if (!ops->get_tunable) 2283 return -EOPNOTSUPP; 2284 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2285 return -EFAULT; 2286 ret = ethtool_tunable_valid(&tuna); 2287 if (ret) 2288 return ret; 2289 data = kmalloc(tuna.len, GFP_USER); 2290 if (!data) 2291 return -ENOMEM; 2292 ret = ops->get_tunable(dev, &tuna, data); 2293 if (ret) 2294 goto out; 2295 useraddr += sizeof(tuna); 2296 ret = -EFAULT; 2297 if (copy_to_user(useraddr, data, tuna.len)) 2298 goto out; 2299 ret = 0; 2300 2301 out: 2302 kfree(data); 2303 return ret; 2304 } 2305 2306 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2307 { 2308 int ret; 2309 struct ethtool_tunable tuna; 2310 const struct ethtool_ops *ops = dev->ethtool_ops; 2311 void *data; 2312 2313 if (!ops->set_tunable) 2314 return -EOPNOTSUPP; 2315 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2316 return -EFAULT; 2317 ret = ethtool_tunable_valid(&tuna); 2318 if (ret) 2319 return ret; 2320 useraddr += sizeof(tuna); 2321 data = memdup_user(useraddr, tuna.len); 2322 if (IS_ERR(data)) 2323 return PTR_ERR(data); 2324 ret = ops->set_tunable(dev, &tuna, data); 2325 2326 kfree(data); 2327 return ret; 2328 } 2329 2330 static noinline_for_stack int 2331 ethtool_get_per_queue_coalesce(struct net_device *dev, 2332 void __user *useraddr, 2333 struct ethtool_per_queue_op *per_queue_opt) 2334 { 2335 u32 bit; 2336 int ret; 2337 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2338 2339 if (!dev->ethtool_ops->get_per_queue_coalesce) 2340 return -EOPNOTSUPP; 2341 2342 useraddr += sizeof(*per_queue_opt); 2343 2344 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2345 MAX_NUM_QUEUE); 2346 2347 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2348 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2349 2350 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2351 if (ret != 0) 2352 return ret; 2353 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2354 return -EFAULT; 2355 useraddr += sizeof(coalesce); 2356 } 2357 2358 return 0; 2359 } 2360 2361 static noinline_for_stack int 2362 ethtool_set_per_queue_coalesce(struct net_device *dev, 2363 void __user *useraddr, 2364 struct ethtool_per_queue_op *per_queue_opt) 2365 { 2366 u32 bit; 2367 int i, ret = 0; 2368 int n_queue; 2369 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2370 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2371 2372 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2373 (!dev->ethtool_ops->get_per_queue_coalesce)) 2374 return -EOPNOTSUPP; 2375 2376 useraddr += sizeof(*per_queue_opt); 2377 2378 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2379 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2380 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2381 if (!backup) 2382 return -ENOMEM; 2383 2384 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2385 struct ethtool_coalesce coalesce; 2386 2387 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2388 if (ret != 0) 2389 goto roll_back; 2390 2391 tmp++; 2392 2393 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2394 ret = -EFAULT; 2395 goto roll_back; 2396 } 2397 2398 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2399 ret = -EOPNOTSUPP; 2400 goto roll_back; 2401 } 2402 2403 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2404 if (ret != 0) 2405 goto roll_back; 2406 2407 useraddr += sizeof(coalesce); 2408 } 2409 2410 roll_back: 2411 if (ret != 0) { 2412 tmp = backup; 2413 for_each_set_bit(i, queue_mask, bit) { 2414 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2415 tmp++; 2416 } 2417 } 2418 kfree(backup); 2419 2420 return ret; 2421 } 2422 2423 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2424 void __user *useraddr, u32 sub_cmd) 2425 { 2426 struct ethtool_per_queue_op per_queue_opt; 2427 2428 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2429 return -EFAULT; 2430 2431 if (per_queue_opt.sub_command != sub_cmd) 2432 return -EINVAL; 2433 2434 switch (per_queue_opt.sub_command) { 2435 case ETHTOOL_GCOALESCE: 2436 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2437 case ETHTOOL_SCOALESCE: 2438 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2439 default: 2440 return -EOPNOTSUPP; 2441 }; 2442 } 2443 2444 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2445 { 2446 switch (tuna->id) { 2447 case ETHTOOL_PHY_DOWNSHIFT: 2448 case ETHTOOL_PHY_FAST_LINK_DOWN: 2449 if (tuna->len != sizeof(u8) || 2450 tuna->type_id != ETHTOOL_TUNABLE_U8) 2451 return -EINVAL; 2452 break; 2453 case ETHTOOL_PHY_EDPD: 2454 if (tuna->len != sizeof(u16) || 2455 tuna->type_id != ETHTOOL_TUNABLE_U16) 2456 return -EINVAL; 2457 break; 2458 default: 2459 return -EINVAL; 2460 } 2461 2462 return 0; 2463 } 2464 2465 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2466 { 2467 int ret; 2468 struct ethtool_tunable tuna; 2469 struct phy_device *phydev = dev->phydev; 2470 void *data; 2471 2472 if (!(phydev && phydev->drv && phydev->drv->get_tunable)) 2473 return -EOPNOTSUPP; 2474 2475 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2476 return -EFAULT; 2477 ret = ethtool_phy_tunable_valid(&tuna); 2478 if (ret) 2479 return ret; 2480 data = kmalloc(tuna.len, GFP_USER); 2481 if (!data) 2482 return -ENOMEM; 2483 mutex_lock(&phydev->lock); 2484 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2485 mutex_unlock(&phydev->lock); 2486 if (ret) 2487 goto out; 2488 useraddr += sizeof(tuna); 2489 ret = -EFAULT; 2490 if (copy_to_user(useraddr, data, tuna.len)) 2491 goto out; 2492 ret = 0; 2493 2494 out: 2495 kfree(data); 2496 return ret; 2497 } 2498 2499 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2500 { 2501 int ret; 2502 struct ethtool_tunable tuna; 2503 struct phy_device *phydev = dev->phydev; 2504 void *data; 2505 2506 if (!(phydev && phydev->drv && phydev->drv->set_tunable)) 2507 return -EOPNOTSUPP; 2508 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2509 return -EFAULT; 2510 ret = ethtool_phy_tunable_valid(&tuna); 2511 if (ret) 2512 return ret; 2513 useraddr += sizeof(tuna); 2514 data = memdup_user(useraddr, tuna.len); 2515 if (IS_ERR(data)) 2516 return PTR_ERR(data); 2517 mutex_lock(&phydev->lock); 2518 ret = phydev->drv->set_tunable(phydev, &tuna, data); 2519 mutex_unlock(&phydev->lock); 2520 2521 kfree(data); 2522 return ret; 2523 } 2524 2525 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 2526 { 2527 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 2528 int rc; 2529 2530 if (!dev->ethtool_ops->get_fecparam) 2531 return -EOPNOTSUPP; 2532 2533 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 2534 if (rc) 2535 return rc; 2536 2537 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 2538 return -EFAULT; 2539 return 0; 2540 } 2541 2542 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 2543 { 2544 struct ethtool_fecparam fecparam; 2545 2546 if (!dev->ethtool_ops->set_fecparam) 2547 return -EOPNOTSUPP; 2548 2549 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 2550 return -EFAULT; 2551 2552 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 2553 } 2554 2555 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 2556 2557 int dev_ethtool(struct net *net, struct ifreq *ifr) 2558 { 2559 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 2560 void __user *useraddr = ifr->ifr_data; 2561 u32 ethcmd, sub_cmd; 2562 int rc; 2563 netdev_features_t old_features; 2564 2565 if (!dev || !netif_device_present(dev)) 2566 return -ENODEV; 2567 2568 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 2569 return -EFAULT; 2570 2571 if (ethcmd == ETHTOOL_PERQUEUE) { 2572 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 2573 return -EFAULT; 2574 } else { 2575 sub_cmd = ethcmd; 2576 } 2577 /* Allow some commands to be done by anyone */ 2578 switch (sub_cmd) { 2579 case ETHTOOL_GSET: 2580 case ETHTOOL_GDRVINFO: 2581 case ETHTOOL_GMSGLVL: 2582 case ETHTOOL_GLINK: 2583 case ETHTOOL_GCOALESCE: 2584 case ETHTOOL_GRINGPARAM: 2585 case ETHTOOL_GPAUSEPARAM: 2586 case ETHTOOL_GRXCSUM: 2587 case ETHTOOL_GTXCSUM: 2588 case ETHTOOL_GSG: 2589 case ETHTOOL_GSSET_INFO: 2590 case ETHTOOL_GSTRINGS: 2591 case ETHTOOL_GSTATS: 2592 case ETHTOOL_GPHYSTATS: 2593 case ETHTOOL_GTSO: 2594 case ETHTOOL_GPERMADDR: 2595 case ETHTOOL_GUFO: 2596 case ETHTOOL_GGSO: 2597 case ETHTOOL_GGRO: 2598 case ETHTOOL_GFLAGS: 2599 case ETHTOOL_GPFLAGS: 2600 case ETHTOOL_GRXFH: 2601 case ETHTOOL_GRXRINGS: 2602 case ETHTOOL_GRXCLSRLCNT: 2603 case ETHTOOL_GRXCLSRULE: 2604 case ETHTOOL_GRXCLSRLALL: 2605 case ETHTOOL_GRXFHINDIR: 2606 case ETHTOOL_GRSSH: 2607 case ETHTOOL_GFEATURES: 2608 case ETHTOOL_GCHANNELS: 2609 case ETHTOOL_GET_TS_INFO: 2610 case ETHTOOL_GEEE: 2611 case ETHTOOL_GTUNABLE: 2612 case ETHTOOL_PHY_GTUNABLE: 2613 case ETHTOOL_GLINKSETTINGS: 2614 case ETHTOOL_GFECPARAM: 2615 break; 2616 default: 2617 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2618 return -EPERM; 2619 } 2620 2621 if (dev->ethtool_ops->begin) { 2622 rc = dev->ethtool_ops->begin(dev); 2623 if (rc < 0) 2624 return rc; 2625 } 2626 old_features = dev->features; 2627 2628 switch (ethcmd) { 2629 case ETHTOOL_GSET: 2630 rc = ethtool_get_settings(dev, useraddr); 2631 break; 2632 case ETHTOOL_SSET: 2633 rc = ethtool_set_settings(dev, useraddr); 2634 break; 2635 case ETHTOOL_GDRVINFO: 2636 rc = ethtool_get_drvinfo(dev, useraddr); 2637 break; 2638 case ETHTOOL_GREGS: 2639 rc = ethtool_get_regs(dev, useraddr); 2640 break; 2641 case ETHTOOL_GWOL: 2642 rc = ethtool_get_wol(dev, useraddr); 2643 break; 2644 case ETHTOOL_SWOL: 2645 rc = ethtool_set_wol(dev, useraddr); 2646 break; 2647 case ETHTOOL_GMSGLVL: 2648 rc = ethtool_get_value(dev, useraddr, ethcmd, 2649 dev->ethtool_ops->get_msglevel); 2650 break; 2651 case ETHTOOL_SMSGLVL: 2652 rc = ethtool_set_value_void(dev, useraddr, 2653 dev->ethtool_ops->set_msglevel); 2654 if (!rc) 2655 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 2656 break; 2657 case ETHTOOL_GEEE: 2658 rc = ethtool_get_eee(dev, useraddr); 2659 break; 2660 case ETHTOOL_SEEE: 2661 rc = ethtool_set_eee(dev, useraddr); 2662 break; 2663 case ETHTOOL_NWAY_RST: 2664 rc = ethtool_nway_reset(dev); 2665 break; 2666 case ETHTOOL_GLINK: 2667 rc = ethtool_get_link(dev, useraddr); 2668 break; 2669 case ETHTOOL_GEEPROM: 2670 rc = ethtool_get_eeprom(dev, useraddr); 2671 break; 2672 case ETHTOOL_SEEPROM: 2673 rc = ethtool_set_eeprom(dev, useraddr); 2674 break; 2675 case ETHTOOL_GCOALESCE: 2676 rc = ethtool_get_coalesce(dev, useraddr); 2677 break; 2678 case ETHTOOL_SCOALESCE: 2679 rc = ethtool_set_coalesce(dev, useraddr); 2680 break; 2681 case ETHTOOL_GRINGPARAM: 2682 rc = ethtool_get_ringparam(dev, useraddr); 2683 break; 2684 case ETHTOOL_SRINGPARAM: 2685 rc = ethtool_set_ringparam(dev, useraddr); 2686 break; 2687 case ETHTOOL_GPAUSEPARAM: 2688 rc = ethtool_get_pauseparam(dev, useraddr); 2689 break; 2690 case ETHTOOL_SPAUSEPARAM: 2691 rc = ethtool_set_pauseparam(dev, useraddr); 2692 break; 2693 case ETHTOOL_TEST: 2694 rc = ethtool_self_test(dev, useraddr); 2695 break; 2696 case ETHTOOL_GSTRINGS: 2697 rc = ethtool_get_strings(dev, useraddr); 2698 break; 2699 case ETHTOOL_PHYS_ID: 2700 rc = ethtool_phys_id(dev, useraddr); 2701 break; 2702 case ETHTOOL_GSTATS: 2703 rc = ethtool_get_stats(dev, useraddr); 2704 break; 2705 case ETHTOOL_GPERMADDR: 2706 rc = ethtool_get_perm_addr(dev, useraddr); 2707 break; 2708 case ETHTOOL_GFLAGS: 2709 rc = ethtool_get_value(dev, useraddr, ethcmd, 2710 __ethtool_get_flags); 2711 break; 2712 case ETHTOOL_SFLAGS: 2713 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 2714 break; 2715 case ETHTOOL_GPFLAGS: 2716 rc = ethtool_get_value(dev, useraddr, ethcmd, 2717 dev->ethtool_ops->get_priv_flags); 2718 if (!rc) 2719 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 2720 break; 2721 case ETHTOOL_SPFLAGS: 2722 rc = ethtool_set_value(dev, useraddr, 2723 dev->ethtool_ops->set_priv_flags); 2724 break; 2725 case ETHTOOL_GRXFH: 2726 case ETHTOOL_GRXRINGS: 2727 case ETHTOOL_GRXCLSRLCNT: 2728 case ETHTOOL_GRXCLSRULE: 2729 case ETHTOOL_GRXCLSRLALL: 2730 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 2731 break; 2732 case ETHTOOL_SRXFH: 2733 case ETHTOOL_SRXCLSRLDEL: 2734 case ETHTOOL_SRXCLSRLINS: 2735 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 2736 break; 2737 case ETHTOOL_FLASHDEV: 2738 rc = ethtool_flash_device(dev, useraddr); 2739 break; 2740 case ETHTOOL_RESET: 2741 rc = ethtool_reset(dev, useraddr); 2742 break; 2743 case ETHTOOL_GSSET_INFO: 2744 rc = ethtool_get_sset_info(dev, useraddr); 2745 break; 2746 case ETHTOOL_GRXFHINDIR: 2747 rc = ethtool_get_rxfh_indir(dev, useraddr); 2748 break; 2749 case ETHTOOL_SRXFHINDIR: 2750 rc = ethtool_set_rxfh_indir(dev, useraddr); 2751 break; 2752 case ETHTOOL_GRSSH: 2753 rc = ethtool_get_rxfh(dev, useraddr); 2754 break; 2755 case ETHTOOL_SRSSH: 2756 rc = ethtool_set_rxfh(dev, useraddr); 2757 break; 2758 case ETHTOOL_GFEATURES: 2759 rc = ethtool_get_features(dev, useraddr); 2760 break; 2761 case ETHTOOL_SFEATURES: 2762 rc = ethtool_set_features(dev, useraddr); 2763 break; 2764 case ETHTOOL_GTXCSUM: 2765 case ETHTOOL_GRXCSUM: 2766 case ETHTOOL_GSG: 2767 case ETHTOOL_GTSO: 2768 case ETHTOOL_GGSO: 2769 case ETHTOOL_GGRO: 2770 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 2771 break; 2772 case ETHTOOL_STXCSUM: 2773 case ETHTOOL_SRXCSUM: 2774 case ETHTOOL_SSG: 2775 case ETHTOOL_STSO: 2776 case ETHTOOL_SGSO: 2777 case ETHTOOL_SGRO: 2778 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 2779 break; 2780 case ETHTOOL_GCHANNELS: 2781 rc = ethtool_get_channels(dev, useraddr); 2782 break; 2783 case ETHTOOL_SCHANNELS: 2784 rc = ethtool_set_channels(dev, useraddr); 2785 break; 2786 case ETHTOOL_SET_DUMP: 2787 rc = ethtool_set_dump(dev, useraddr); 2788 break; 2789 case ETHTOOL_GET_DUMP_FLAG: 2790 rc = ethtool_get_dump_flag(dev, useraddr); 2791 break; 2792 case ETHTOOL_GET_DUMP_DATA: 2793 rc = ethtool_get_dump_data(dev, useraddr); 2794 break; 2795 case ETHTOOL_GET_TS_INFO: 2796 rc = ethtool_get_ts_info(dev, useraddr); 2797 break; 2798 case ETHTOOL_GMODULEINFO: 2799 rc = ethtool_get_module_info(dev, useraddr); 2800 break; 2801 case ETHTOOL_GMODULEEEPROM: 2802 rc = ethtool_get_module_eeprom(dev, useraddr); 2803 break; 2804 case ETHTOOL_GTUNABLE: 2805 rc = ethtool_get_tunable(dev, useraddr); 2806 break; 2807 case ETHTOOL_STUNABLE: 2808 rc = ethtool_set_tunable(dev, useraddr); 2809 break; 2810 case ETHTOOL_GPHYSTATS: 2811 rc = ethtool_get_phy_stats(dev, useraddr); 2812 break; 2813 case ETHTOOL_PERQUEUE: 2814 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 2815 break; 2816 case ETHTOOL_GLINKSETTINGS: 2817 rc = ethtool_get_link_ksettings(dev, useraddr); 2818 break; 2819 case ETHTOOL_SLINKSETTINGS: 2820 rc = ethtool_set_link_ksettings(dev, useraddr); 2821 break; 2822 case ETHTOOL_PHY_GTUNABLE: 2823 rc = get_phy_tunable(dev, useraddr); 2824 break; 2825 case ETHTOOL_PHY_STUNABLE: 2826 rc = set_phy_tunable(dev, useraddr); 2827 break; 2828 case ETHTOOL_GFECPARAM: 2829 rc = ethtool_get_fecparam(dev, useraddr); 2830 break; 2831 case ETHTOOL_SFECPARAM: 2832 rc = ethtool_set_fecparam(dev, useraddr); 2833 break; 2834 default: 2835 rc = -EOPNOTSUPP; 2836 } 2837 2838 if (dev->ethtool_ops->complete) 2839 dev->ethtool_ops->complete(dev); 2840 2841 if (old_features != dev->features) 2842 netdev_features_change(dev); 2843 2844 return rc; 2845 } 2846 2847 struct ethtool_rx_flow_key { 2848 struct flow_dissector_key_basic basic; 2849 union { 2850 struct flow_dissector_key_ipv4_addrs ipv4; 2851 struct flow_dissector_key_ipv6_addrs ipv6; 2852 }; 2853 struct flow_dissector_key_ports tp; 2854 struct flow_dissector_key_ip ip; 2855 struct flow_dissector_key_vlan vlan; 2856 struct flow_dissector_key_eth_addrs eth_addrs; 2857 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 2858 2859 struct ethtool_rx_flow_match { 2860 struct flow_dissector dissector; 2861 struct ethtool_rx_flow_key key; 2862 struct ethtool_rx_flow_key mask; 2863 }; 2864 2865 struct ethtool_rx_flow_rule * 2866 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 2867 { 2868 const struct ethtool_rx_flow_spec *fs = input->fs; 2869 static struct in6_addr zero_addr = {}; 2870 struct ethtool_rx_flow_match *match; 2871 struct ethtool_rx_flow_rule *flow; 2872 struct flow_action_entry *act; 2873 2874 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 2875 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 2876 if (!flow) 2877 return ERR_PTR(-ENOMEM); 2878 2879 /* ethtool_rx supports only one single action per rule. */ 2880 flow->rule = flow_rule_alloc(1); 2881 if (!flow->rule) { 2882 kfree(flow); 2883 return ERR_PTR(-ENOMEM); 2884 } 2885 2886 match = (struct ethtool_rx_flow_match *)flow->priv; 2887 flow->rule->match.dissector = &match->dissector; 2888 flow->rule->match.mask = &match->mask; 2889 flow->rule->match.key = &match->key; 2890 2891 match->mask.basic.n_proto = htons(0xffff); 2892 2893 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2894 case ETHER_FLOW: { 2895 const struct ethhdr *ether_spec, *ether_m_spec; 2896 2897 ether_spec = &fs->h_u.ether_spec; 2898 ether_m_spec = &fs->m_u.ether_spec; 2899 2900 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 2901 ether_addr_copy(match->key.eth_addrs.src, 2902 ether_spec->h_source); 2903 ether_addr_copy(match->mask.eth_addrs.src, 2904 ether_m_spec->h_source); 2905 } 2906 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 2907 ether_addr_copy(match->key.eth_addrs.dst, 2908 ether_spec->h_dest); 2909 ether_addr_copy(match->mask.eth_addrs.dst, 2910 ether_m_spec->h_dest); 2911 } 2912 if (ether_m_spec->h_proto) { 2913 match->key.basic.n_proto = ether_spec->h_proto; 2914 match->mask.basic.n_proto = ether_m_spec->h_proto; 2915 } 2916 } 2917 break; 2918 case TCP_V4_FLOW: 2919 case UDP_V4_FLOW: { 2920 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 2921 2922 match->key.basic.n_proto = htons(ETH_P_IP); 2923 2924 v4_spec = &fs->h_u.tcp_ip4_spec; 2925 v4_m_spec = &fs->m_u.tcp_ip4_spec; 2926 2927 if (v4_m_spec->ip4src) { 2928 match->key.ipv4.src = v4_spec->ip4src; 2929 match->mask.ipv4.src = v4_m_spec->ip4src; 2930 } 2931 if (v4_m_spec->ip4dst) { 2932 match->key.ipv4.dst = v4_spec->ip4dst; 2933 match->mask.ipv4.dst = v4_m_spec->ip4dst; 2934 } 2935 if (v4_m_spec->ip4src || 2936 v4_m_spec->ip4dst) { 2937 match->dissector.used_keys |= 2938 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 2939 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 2940 offsetof(struct ethtool_rx_flow_key, ipv4); 2941 } 2942 if (v4_m_spec->psrc) { 2943 match->key.tp.src = v4_spec->psrc; 2944 match->mask.tp.src = v4_m_spec->psrc; 2945 } 2946 if (v4_m_spec->pdst) { 2947 match->key.tp.dst = v4_spec->pdst; 2948 match->mask.tp.dst = v4_m_spec->pdst; 2949 } 2950 if (v4_m_spec->psrc || 2951 v4_m_spec->pdst) { 2952 match->dissector.used_keys |= 2953 BIT(FLOW_DISSECTOR_KEY_PORTS); 2954 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2955 offsetof(struct ethtool_rx_flow_key, tp); 2956 } 2957 if (v4_m_spec->tos) { 2958 match->key.ip.tos = v4_spec->tos; 2959 match->mask.ip.tos = v4_m_spec->tos; 2960 match->dissector.used_keys |= 2961 BIT(FLOW_DISSECTOR_KEY_IP); 2962 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2963 offsetof(struct ethtool_rx_flow_key, ip); 2964 } 2965 } 2966 break; 2967 case TCP_V6_FLOW: 2968 case UDP_V6_FLOW: { 2969 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 2970 2971 match->key.basic.n_proto = htons(ETH_P_IPV6); 2972 2973 v6_spec = &fs->h_u.tcp_ip6_spec; 2974 v6_m_spec = &fs->m_u.tcp_ip6_spec; 2975 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2976 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 2977 sizeof(match->key.ipv6.src)); 2978 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 2979 sizeof(match->mask.ipv6.src)); 2980 } 2981 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2982 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 2983 sizeof(match->key.ipv6.dst)); 2984 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 2985 sizeof(match->mask.ipv6.dst)); 2986 } 2987 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) || 2988 memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2989 match->dissector.used_keys |= 2990 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 2991 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 2992 offsetof(struct ethtool_rx_flow_key, ipv6); 2993 } 2994 if (v6_m_spec->psrc) { 2995 match->key.tp.src = v6_spec->psrc; 2996 match->mask.tp.src = v6_m_spec->psrc; 2997 } 2998 if (v6_m_spec->pdst) { 2999 match->key.tp.dst = v6_spec->pdst; 3000 match->mask.tp.dst = v6_m_spec->pdst; 3001 } 3002 if (v6_m_spec->psrc || 3003 v6_m_spec->pdst) { 3004 match->dissector.used_keys |= 3005 BIT(FLOW_DISSECTOR_KEY_PORTS); 3006 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3007 offsetof(struct ethtool_rx_flow_key, tp); 3008 } 3009 if (v6_m_spec->tclass) { 3010 match->key.ip.tos = v6_spec->tclass; 3011 match->mask.ip.tos = v6_m_spec->tclass; 3012 match->dissector.used_keys |= 3013 BIT(FLOW_DISSECTOR_KEY_IP); 3014 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3015 offsetof(struct ethtool_rx_flow_key, ip); 3016 } 3017 } 3018 break; 3019 default: 3020 ethtool_rx_flow_rule_destroy(flow); 3021 return ERR_PTR(-EINVAL); 3022 } 3023 3024 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3025 case TCP_V4_FLOW: 3026 case TCP_V6_FLOW: 3027 match->key.basic.ip_proto = IPPROTO_TCP; 3028 break; 3029 case UDP_V4_FLOW: 3030 case UDP_V6_FLOW: 3031 match->key.basic.ip_proto = IPPROTO_UDP; 3032 break; 3033 } 3034 match->mask.basic.ip_proto = 0xff; 3035 3036 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC); 3037 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3038 offsetof(struct ethtool_rx_flow_key, basic); 3039 3040 if (fs->flow_type & FLOW_EXT) { 3041 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3042 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3043 3044 if (ext_m_spec->vlan_etype) { 3045 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3046 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3047 } 3048 3049 if (ext_m_spec->vlan_tci) { 3050 match->key.vlan.vlan_id = 3051 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3052 match->mask.vlan.vlan_id = 3053 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3054 3055 match->key.vlan.vlan_dei = 3056 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3057 match->mask.vlan.vlan_dei = 3058 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3059 3060 match->key.vlan.vlan_priority = 3061 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3062 match->mask.vlan.vlan_priority = 3063 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3064 } 3065 3066 if (ext_m_spec->vlan_etype || 3067 ext_m_spec->vlan_tci) { 3068 match->dissector.used_keys |= 3069 BIT(FLOW_DISSECTOR_KEY_VLAN); 3070 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3071 offsetof(struct ethtool_rx_flow_key, vlan); 3072 } 3073 } 3074 if (fs->flow_type & FLOW_MAC_EXT) { 3075 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3076 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3077 3078 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3079 ETH_ALEN); 3080 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3081 ETH_ALEN); 3082 3083 match->dissector.used_keys |= 3084 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3085 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3086 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3087 } 3088 3089 act = &flow->rule->action.entries[0]; 3090 switch (fs->ring_cookie) { 3091 case RX_CLS_FLOW_DISC: 3092 act->id = FLOW_ACTION_DROP; 3093 break; 3094 case RX_CLS_FLOW_WAKE: 3095 act->id = FLOW_ACTION_WAKE; 3096 break; 3097 default: 3098 act->id = FLOW_ACTION_QUEUE; 3099 if (fs->flow_type & FLOW_RSS) 3100 act->queue.ctx = input->rss_ctx; 3101 3102 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3103 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3104 break; 3105 } 3106 3107 return flow; 3108 } 3109 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3110 3111 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3112 { 3113 kfree(flow->rule); 3114 kfree(flow); 3115 } 3116 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3117