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