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_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 int ret; 1514 1515 if (!dev->ethtool_ops->get_coalesce) 1516 return -EOPNOTSUPP; 1517 1518 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce); 1519 if (ret) 1520 return ret; 1521 1522 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1523 return -EFAULT; 1524 return 0; 1525 } 1526 1527 static bool 1528 ethtool_set_coalesce_supported(struct net_device *dev, 1529 struct ethtool_coalesce *coalesce) 1530 { 1531 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1532 u32 nonzero_params = 0; 1533 1534 if (coalesce->rx_coalesce_usecs) 1535 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1536 if (coalesce->rx_max_coalesced_frames) 1537 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1538 if (coalesce->rx_coalesce_usecs_irq) 1539 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1540 if (coalesce->rx_max_coalesced_frames_irq) 1541 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1542 if (coalesce->tx_coalesce_usecs) 1543 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1544 if (coalesce->tx_max_coalesced_frames) 1545 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1546 if (coalesce->tx_coalesce_usecs_irq) 1547 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1548 if (coalesce->tx_max_coalesced_frames_irq) 1549 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1550 if (coalesce->stats_block_coalesce_usecs) 1551 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1552 if (coalesce->use_adaptive_rx_coalesce) 1553 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1554 if (coalesce->use_adaptive_tx_coalesce) 1555 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1556 if (coalesce->pkt_rate_low) 1557 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1558 if (coalesce->rx_coalesce_usecs_low) 1559 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1560 if (coalesce->rx_max_coalesced_frames_low) 1561 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1562 if (coalesce->tx_coalesce_usecs_low) 1563 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1564 if (coalesce->tx_max_coalesced_frames_low) 1565 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1566 if (coalesce->pkt_rate_high) 1567 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1568 if (coalesce->rx_coalesce_usecs_high) 1569 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1570 if (coalesce->rx_max_coalesced_frames_high) 1571 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1572 if (coalesce->tx_coalesce_usecs_high) 1573 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1574 if (coalesce->tx_max_coalesced_frames_high) 1575 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1576 if (coalesce->rate_sample_interval) 1577 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1578 1579 return (supported_params & nonzero_params) == nonzero_params; 1580 } 1581 1582 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1583 void __user *useraddr) 1584 { 1585 struct ethtool_coalesce coalesce; 1586 int ret; 1587 1588 if (!dev->ethtool_ops->set_coalesce) 1589 return -EOPNOTSUPP; 1590 1591 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1592 return -EFAULT; 1593 1594 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 1595 return -EOPNOTSUPP; 1596 1597 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce); 1598 if (!ret) 1599 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); 1600 return ret; 1601 } 1602 1603 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1604 { 1605 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1606 1607 if (!dev->ethtool_ops->get_ringparam) 1608 return -EOPNOTSUPP; 1609 1610 dev->ethtool_ops->get_ringparam(dev, &ringparam); 1611 1612 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1613 return -EFAULT; 1614 return 0; 1615 } 1616 1617 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1618 { 1619 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 1620 int ret; 1621 1622 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 1623 return -EOPNOTSUPP; 1624 1625 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1626 return -EFAULT; 1627 1628 dev->ethtool_ops->get_ringparam(dev, &max); 1629 1630 /* ensure new ring parameters are within the maximums */ 1631 if (ringparam.rx_pending > max.rx_max_pending || 1632 ringparam.rx_mini_pending > max.rx_mini_max_pending || 1633 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 1634 ringparam.tx_pending > max.tx_max_pending) 1635 return -EINVAL; 1636 1637 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam); 1638 if (!ret) 1639 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 1640 return ret; 1641 } 1642 1643 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1644 void __user *useraddr) 1645 { 1646 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1647 1648 if (!dev->ethtool_ops->get_channels) 1649 return -EOPNOTSUPP; 1650 1651 dev->ethtool_ops->get_channels(dev, &channels); 1652 1653 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1654 return -EFAULT; 1655 return 0; 1656 } 1657 1658 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1659 void __user *useraddr) 1660 { 1661 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 1662 u16 from_channel, to_channel; 1663 u32 max_rx_in_use = 0; 1664 unsigned int i; 1665 int ret; 1666 1667 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 1668 return -EOPNOTSUPP; 1669 1670 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1671 return -EFAULT; 1672 1673 dev->ethtool_ops->get_channels(dev, &curr); 1674 1675 if (channels.rx_count == curr.rx_count && 1676 channels.tx_count == curr.tx_count && 1677 channels.combined_count == curr.combined_count && 1678 channels.other_count == curr.other_count) 1679 return 0; 1680 1681 /* ensure new counts are within the maximums */ 1682 if (channels.rx_count > curr.max_rx || 1683 channels.tx_count > curr.max_tx || 1684 channels.combined_count > curr.max_combined || 1685 channels.other_count > curr.max_other) 1686 return -EINVAL; 1687 1688 /* ensure there is at least one RX and one TX channel */ 1689 if (!channels.combined_count && 1690 (!channels.rx_count || !channels.tx_count)) 1691 return -EINVAL; 1692 1693 /* ensure the new Rx count fits within the configured Rx flow 1694 * indirection table settings */ 1695 if (netif_is_rxfh_configured(dev) && 1696 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) && 1697 (channels.combined_count + channels.rx_count) <= max_rx_in_use) 1698 return -EINVAL; 1699 1700 /* Disabling channels, query zero-copy AF_XDP sockets */ 1701 from_channel = channels.combined_count + 1702 min(channels.rx_count, channels.tx_count); 1703 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 1704 for (i = from_channel; i < to_channel; i++) 1705 if (xdp_get_umem_from_qid(dev, i)) 1706 return -EINVAL; 1707 1708 ret = dev->ethtool_ops->set_channels(dev, &channels); 1709 if (!ret) 1710 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 1711 return ret; 1712 } 1713 1714 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1715 { 1716 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 1717 1718 if (!dev->ethtool_ops->get_pauseparam) 1719 return -EOPNOTSUPP; 1720 1721 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1722 1723 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1724 return -EFAULT; 1725 return 0; 1726 } 1727 1728 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1729 { 1730 struct ethtool_pauseparam pauseparam; 1731 int ret; 1732 1733 if (!dev->ethtool_ops->set_pauseparam) 1734 return -EOPNOTSUPP; 1735 1736 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1737 return -EFAULT; 1738 1739 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1740 if (!ret) 1741 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); 1742 return ret; 1743 } 1744 1745 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1746 { 1747 struct ethtool_test test; 1748 const struct ethtool_ops *ops = dev->ethtool_ops; 1749 u64 *data; 1750 int ret, test_len; 1751 1752 if (!ops->self_test || !ops->get_sset_count) 1753 return -EOPNOTSUPP; 1754 1755 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1756 if (test_len < 0) 1757 return test_len; 1758 WARN_ON(test_len == 0); 1759 1760 if (copy_from_user(&test, useraddr, sizeof(test))) 1761 return -EFAULT; 1762 1763 test.len = test_len; 1764 data = kmalloc_array(test_len, sizeof(u64), GFP_USER); 1765 if (!data) 1766 return -ENOMEM; 1767 1768 netif_testing_on(dev); 1769 ops->self_test(dev, &test, data); 1770 netif_testing_off(dev); 1771 1772 ret = -EFAULT; 1773 if (copy_to_user(useraddr, &test, sizeof(test))) 1774 goto out; 1775 useraddr += sizeof(test); 1776 if (copy_to_user(useraddr, data, test.len * sizeof(u64))) 1777 goto out; 1778 ret = 0; 1779 1780 out: 1781 kfree(data); 1782 return ret; 1783 } 1784 1785 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1786 { 1787 struct ethtool_gstrings gstrings; 1788 u8 *data; 1789 int ret; 1790 1791 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1792 return -EFAULT; 1793 1794 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1795 if (ret < 0) 1796 return ret; 1797 if (ret > S32_MAX / ETH_GSTRING_LEN) 1798 return -ENOMEM; 1799 WARN_ON_ONCE(!ret); 1800 1801 gstrings.len = ret; 1802 1803 if (gstrings.len) { 1804 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 1805 if (!data) 1806 return -ENOMEM; 1807 1808 __ethtool_get_strings(dev, gstrings.string_set, data); 1809 } else { 1810 data = NULL; 1811 } 1812 1813 ret = -EFAULT; 1814 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1815 goto out; 1816 useraddr += sizeof(gstrings); 1817 if (gstrings.len && 1818 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) 1819 goto out; 1820 ret = 0; 1821 1822 out: 1823 vfree(data); 1824 return ret; 1825 } 1826 1827 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 1828 { 1829 struct ethtool_value id; 1830 static bool busy; 1831 const struct ethtool_ops *ops = dev->ethtool_ops; 1832 int rc; 1833 1834 if (!ops->set_phys_id) 1835 return -EOPNOTSUPP; 1836 1837 if (busy) 1838 return -EBUSY; 1839 1840 if (copy_from_user(&id, useraddr, sizeof(id))) 1841 return -EFAULT; 1842 1843 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 1844 if (rc < 0) 1845 return rc; 1846 1847 /* Drop the RTNL lock while waiting, but prevent reentry or 1848 * removal of the device. 1849 */ 1850 busy = true; 1851 dev_hold(dev); 1852 rtnl_unlock(); 1853 1854 if (rc == 0) { 1855 /* Driver will handle this itself */ 1856 schedule_timeout_interruptible( 1857 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 1858 } else { 1859 /* Driver expects to be called at twice the frequency in rc */ 1860 int n = rc * 2, i, interval = HZ / n; 1861 1862 /* Count down seconds */ 1863 do { 1864 /* Count down iterations per second */ 1865 i = n; 1866 do { 1867 rtnl_lock(); 1868 rc = ops->set_phys_id(dev, 1869 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 1870 rtnl_unlock(); 1871 if (rc) 1872 break; 1873 schedule_timeout_interruptible(interval); 1874 } while (!signal_pending(current) && --i != 0); 1875 } while (!signal_pending(current) && 1876 (id.data == 0 || --id.data != 0)); 1877 } 1878 1879 rtnl_lock(); 1880 dev_put(dev); 1881 busy = false; 1882 1883 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 1884 return rc; 1885 } 1886 1887 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 1888 { 1889 struct ethtool_stats stats; 1890 const struct ethtool_ops *ops = dev->ethtool_ops; 1891 u64 *data; 1892 int ret, n_stats; 1893 1894 if (!ops->get_ethtool_stats || !ops->get_sset_count) 1895 return -EOPNOTSUPP; 1896 1897 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 1898 if (n_stats < 0) 1899 return n_stats; 1900 if (n_stats > S32_MAX / sizeof(u64)) 1901 return -ENOMEM; 1902 WARN_ON_ONCE(!n_stats); 1903 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1904 return -EFAULT; 1905 1906 stats.n_stats = n_stats; 1907 1908 if (n_stats) { 1909 data = vzalloc(array_size(n_stats, sizeof(u64))); 1910 if (!data) 1911 return -ENOMEM; 1912 ops->get_ethtool_stats(dev, &stats, data); 1913 } else { 1914 data = NULL; 1915 } 1916 1917 ret = -EFAULT; 1918 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1919 goto out; 1920 useraddr += sizeof(stats); 1921 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1922 goto out; 1923 ret = 0; 1924 1925 out: 1926 vfree(data); 1927 return ret; 1928 } 1929 1930 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 1931 { 1932 const struct ethtool_ops *ops = dev->ethtool_ops; 1933 struct phy_device *phydev = dev->phydev; 1934 struct ethtool_stats stats; 1935 u64 *data; 1936 int ret, n_stats; 1937 1938 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count)) 1939 return -EOPNOTSUPP; 1940 1941 if (dev->phydev && !ops->get_ethtool_phy_stats) 1942 n_stats = phy_ethtool_get_sset_count(dev->phydev); 1943 else 1944 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 1945 if (n_stats < 0) 1946 return n_stats; 1947 if (n_stats > S32_MAX / sizeof(u64)) 1948 return -ENOMEM; 1949 WARN_ON_ONCE(!n_stats); 1950 1951 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1952 return -EFAULT; 1953 1954 stats.n_stats = n_stats; 1955 1956 if (n_stats) { 1957 data = vzalloc(array_size(n_stats, sizeof(u64))); 1958 if (!data) 1959 return -ENOMEM; 1960 1961 if (dev->phydev && !ops->get_ethtool_phy_stats) { 1962 ret = phy_ethtool_get_stats(dev->phydev, &stats, data); 1963 if (ret < 0) 1964 goto out; 1965 } else { 1966 ops->get_ethtool_phy_stats(dev, &stats, data); 1967 } 1968 } else { 1969 data = NULL; 1970 } 1971 1972 ret = -EFAULT; 1973 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1974 goto out; 1975 useraddr += sizeof(stats); 1976 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1977 goto out; 1978 ret = 0; 1979 1980 out: 1981 vfree(data); 1982 return ret; 1983 } 1984 1985 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 1986 { 1987 struct ethtool_perm_addr epaddr; 1988 1989 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 1990 return -EFAULT; 1991 1992 if (epaddr.size < dev->addr_len) 1993 return -ETOOSMALL; 1994 epaddr.size = dev->addr_len; 1995 1996 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 1997 return -EFAULT; 1998 useraddr += sizeof(epaddr); 1999 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 2000 return -EFAULT; 2001 return 0; 2002 } 2003 2004 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 2005 u32 cmd, u32 (*actor)(struct net_device *)) 2006 { 2007 struct ethtool_value edata = { .cmd = cmd }; 2008 2009 if (!actor) 2010 return -EOPNOTSUPP; 2011 2012 edata.data = actor(dev); 2013 2014 if (copy_to_user(useraddr, &edata, sizeof(edata))) 2015 return -EFAULT; 2016 return 0; 2017 } 2018 2019 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 2020 void (*actor)(struct net_device *, u32)) 2021 { 2022 struct ethtool_value edata; 2023 2024 if (!actor) 2025 return -EOPNOTSUPP; 2026 2027 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2028 return -EFAULT; 2029 2030 actor(dev, edata.data); 2031 return 0; 2032 } 2033 2034 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2035 int (*actor)(struct net_device *, u32)) 2036 { 2037 struct ethtool_value edata; 2038 2039 if (!actor) 2040 return -EOPNOTSUPP; 2041 2042 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2043 return -EFAULT; 2044 2045 return actor(dev, edata.data); 2046 } 2047 2048 static noinline_for_stack int ethtool_flash_device(struct net_device *dev, 2049 char __user *useraddr) 2050 { 2051 struct ethtool_flash efl; 2052 2053 if (copy_from_user(&efl, useraddr, sizeof(efl))) 2054 return -EFAULT; 2055 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 2056 2057 if (!dev->ethtool_ops->flash_device) 2058 return devlink_compat_flash_update(dev, efl.data); 2059 2060 return dev->ethtool_ops->flash_device(dev, &efl); 2061 } 2062 2063 static int ethtool_set_dump(struct net_device *dev, 2064 void __user *useraddr) 2065 { 2066 struct ethtool_dump dump; 2067 2068 if (!dev->ethtool_ops->set_dump) 2069 return -EOPNOTSUPP; 2070 2071 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2072 return -EFAULT; 2073 2074 return dev->ethtool_ops->set_dump(dev, &dump); 2075 } 2076 2077 static int ethtool_get_dump_flag(struct net_device *dev, 2078 void __user *useraddr) 2079 { 2080 int ret; 2081 struct ethtool_dump dump; 2082 const struct ethtool_ops *ops = dev->ethtool_ops; 2083 2084 if (!ops->get_dump_flag) 2085 return -EOPNOTSUPP; 2086 2087 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2088 return -EFAULT; 2089 2090 ret = ops->get_dump_flag(dev, &dump); 2091 if (ret) 2092 return ret; 2093 2094 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2095 return -EFAULT; 2096 return 0; 2097 } 2098 2099 static int ethtool_get_dump_data(struct net_device *dev, 2100 void __user *useraddr) 2101 { 2102 int ret; 2103 __u32 len; 2104 struct ethtool_dump dump, tmp; 2105 const struct ethtool_ops *ops = dev->ethtool_ops; 2106 void *data = NULL; 2107 2108 if (!ops->get_dump_data || !ops->get_dump_flag) 2109 return -EOPNOTSUPP; 2110 2111 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2112 return -EFAULT; 2113 2114 memset(&tmp, 0, sizeof(tmp)); 2115 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2116 ret = ops->get_dump_flag(dev, &tmp); 2117 if (ret) 2118 return ret; 2119 2120 len = min(tmp.len, dump.len); 2121 if (!len) 2122 return -EFAULT; 2123 2124 /* Don't ever let the driver think there's more space available 2125 * than it requested with .get_dump_flag(). 2126 */ 2127 dump.len = len; 2128 2129 /* Always allocate enough space to hold the whole thing so that the 2130 * driver does not need to check the length and bother with partial 2131 * dumping. 2132 */ 2133 data = vzalloc(tmp.len); 2134 if (!data) 2135 return -ENOMEM; 2136 ret = ops->get_dump_data(dev, &dump, data); 2137 if (ret) 2138 goto out; 2139 2140 /* There are two sane possibilities: 2141 * 1. The driver's .get_dump_data() does not touch dump.len. 2142 * 2. Or it may set dump.len to how much it really writes, which 2143 * should be tmp.len (or len if it can do a partial dump). 2144 * In any case respond to userspace with the actual length of data 2145 * it's receiving. 2146 */ 2147 WARN_ON(dump.len != len && dump.len != tmp.len); 2148 dump.len = len; 2149 2150 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2151 ret = -EFAULT; 2152 goto out; 2153 } 2154 useraddr += offsetof(struct ethtool_dump, data); 2155 if (copy_to_user(useraddr, data, len)) 2156 ret = -EFAULT; 2157 out: 2158 vfree(data); 2159 return ret; 2160 } 2161 2162 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2163 { 2164 struct ethtool_ts_info info; 2165 int err; 2166 2167 err = __ethtool_get_ts_info(dev, &info); 2168 if (err) 2169 return err; 2170 2171 if (copy_to_user(useraddr, &info, sizeof(info))) 2172 return -EFAULT; 2173 2174 return 0; 2175 } 2176 2177 static int __ethtool_get_module_info(struct net_device *dev, 2178 struct ethtool_modinfo *modinfo) 2179 { 2180 const struct ethtool_ops *ops = dev->ethtool_ops; 2181 struct phy_device *phydev = dev->phydev; 2182 2183 if (dev->sfp_bus) 2184 return sfp_get_module_info(dev->sfp_bus, modinfo); 2185 2186 if (phydev && phydev->drv && phydev->drv->module_info) 2187 return phydev->drv->module_info(phydev, modinfo); 2188 2189 if (ops->get_module_info) 2190 return ops->get_module_info(dev, modinfo); 2191 2192 return -EOPNOTSUPP; 2193 } 2194 2195 static int ethtool_get_module_info(struct net_device *dev, 2196 void __user *useraddr) 2197 { 2198 int ret; 2199 struct ethtool_modinfo modinfo; 2200 2201 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2202 return -EFAULT; 2203 2204 ret = __ethtool_get_module_info(dev, &modinfo); 2205 if (ret) 2206 return ret; 2207 2208 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2209 return -EFAULT; 2210 2211 return 0; 2212 } 2213 2214 static int __ethtool_get_module_eeprom(struct net_device *dev, 2215 struct ethtool_eeprom *ee, u8 *data) 2216 { 2217 const struct ethtool_ops *ops = dev->ethtool_ops; 2218 struct phy_device *phydev = dev->phydev; 2219 2220 if (dev->sfp_bus) 2221 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2222 2223 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2224 return phydev->drv->module_eeprom(phydev, ee, data); 2225 2226 if (ops->get_module_eeprom) 2227 return ops->get_module_eeprom(dev, ee, data); 2228 2229 return -EOPNOTSUPP; 2230 } 2231 2232 static int ethtool_get_module_eeprom(struct net_device *dev, 2233 void __user *useraddr) 2234 { 2235 int ret; 2236 struct ethtool_modinfo modinfo; 2237 2238 ret = __ethtool_get_module_info(dev, &modinfo); 2239 if (ret) 2240 return ret; 2241 2242 return ethtool_get_any_eeprom(dev, useraddr, 2243 __ethtool_get_module_eeprom, 2244 modinfo.eeprom_len); 2245 } 2246 2247 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2248 { 2249 switch (tuna->id) { 2250 case ETHTOOL_RX_COPYBREAK: 2251 case ETHTOOL_TX_COPYBREAK: 2252 if (tuna->len != sizeof(u32) || 2253 tuna->type_id != ETHTOOL_TUNABLE_U32) 2254 return -EINVAL; 2255 break; 2256 case ETHTOOL_PFC_PREVENTION_TOUT: 2257 if (tuna->len != sizeof(u16) || 2258 tuna->type_id != ETHTOOL_TUNABLE_U16) 2259 return -EINVAL; 2260 break; 2261 default: 2262 return -EINVAL; 2263 } 2264 2265 return 0; 2266 } 2267 2268 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2269 { 2270 int ret; 2271 struct ethtool_tunable tuna; 2272 const struct ethtool_ops *ops = dev->ethtool_ops; 2273 void *data; 2274 2275 if (!ops->get_tunable) 2276 return -EOPNOTSUPP; 2277 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2278 return -EFAULT; 2279 ret = ethtool_tunable_valid(&tuna); 2280 if (ret) 2281 return ret; 2282 data = kmalloc(tuna.len, GFP_USER); 2283 if (!data) 2284 return -ENOMEM; 2285 ret = ops->get_tunable(dev, &tuna, data); 2286 if (ret) 2287 goto out; 2288 useraddr += sizeof(tuna); 2289 ret = -EFAULT; 2290 if (copy_to_user(useraddr, data, tuna.len)) 2291 goto out; 2292 ret = 0; 2293 2294 out: 2295 kfree(data); 2296 return ret; 2297 } 2298 2299 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2300 { 2301 int ret; 2302 struct ethtool_tunable tuna; 2303 const struct ethtool_ops *ops = dev->ethtool_ops; 2304 void *data; 2305 2306 if (!ops->set_tunable) 2307 return -EOPNOTSUPP; 2308 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2309 return -EFAULT; 2310 ret = ethtool_tunable_valid(&tuna); 2311 if (ret) 2312 return ret; 2313 useraddr += sizeof(tuna); 2314 data = memdup_user(useraddr, tuna.len); 2315 if (IS_ERR(data)) 2316 return PTR_ERR(data); 2317 ret = ops->set_tunable(dev, &tuna, data); 2318 2319 kfree(data); 2320 return ret; 2321 } 2322 2323 static noinline_for_stack int 2324 ethtool_get_per_queue_coalesce(struct net_device *dev, 2325 void __user *useraddr, 2326 struct ethtool_per_queue_op *per_queue_opt) 2327 { 2328 u32 bit; 2329 int ret; 2330 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2331 2332 if (!dev->ethtool_ops->get_per_queue_coalesce) 2333 return -EOPNOTSUPP; 2334 2335 useraddr += sizeof(*per_queue_opt); 2336 2337 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2338 MAX_NUM_QUEUE); 2339 2340 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2341 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2342 2343 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2344 if (ret != 0) 2345 return ret; 2346 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2347 return -EFAULT; 2348 useraddr += sizeof(coalesce); 2349 } 2350 2351 return 0; 2352 } 2353 2354 static noinline_for_stack int 2355 ethtool_set_per_queue_coalesce(struct net_device *dev, 2356 void __user *useraddr, 2357 struct ethtool_per_queue_op *per_queue_opt) 2358 { 2359 u32 bit; 2360 int i, ret = 0; 2361 int n_queue; 2362 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2363 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2364 2365 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2366 (!dev->ethtool_ops->get_per_queue_coalesce)) 2367 return -EOPNOTSUPP; 2368 2369 useraddr += sizeof(*per_queue_opt); 2370 2371 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2372 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2373 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2374 if (!backup) 2375 return -ENOMEM; 2376 2377 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2378 struct ethtool_coalesce coalesce; 2379 2380 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2381 if (ret != 0) 2382 goto roll_back; 2383 2384 tmp++; 2385 2386 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2387 ret = -EFAULT; 2388 goto roll_back; 2389 } 2390 2391 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2392 ret = -EOPNOTSUPP; 2393 goto roll_back; 2394 } 2395 2396 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2397 if (ret != 0) 2398 goto roll_back; 2399 2400 useraddr += sizeof(coalesce); 2401 } 2402 2403 roll_back: 2404 if (ret != 0) { 2405 tmp = backup; 2406 for_each_set_bit(i, queue_mask, bit) { 2407 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2408 tmp++; 2409 } 2410 } 2411 kfree(backup); 2412 2413 return ret; 2414 } 2415 2416 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2417 void __user *useraddr, u32 sub_cmd) 2418 { 2419 struct ethtool_per_queue_op per_queue_opt; 2420 2421 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2422 return -EFAULT; 2423 2424 if (per_queue_opt.sub_command != sub_cmd) 2425 return -EINVAL; 2426 2427 switch (per_queue_opt.sub_command) { 2428 case ETHTOOL_GCOALESCE: 2429 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2430 case ETHTOOL_SCOALESCE: 2431 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2432 default: 2433 return -EOPNOTSUPP; 2434 }; 2435 } 2436 2437 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2438 { 2439 switch (tuna->id) { 2440 case ETHTOOL_PHY_DOWNSHIFT: 2441 case ETHTOOL_PHY_FAST_LINK_DOWN: 2442 if (tuna->len != sizeof(u8) || 2443 tuna->type_id != ETHTOOL_TUNABLE_U8) 2444 return -EINVAL; 2445 break; 2446 case ETHTOOL_PHY_EDPD: 2447 if (tuna->len != sizeof(u16) || 2448 tuna->type_id != ETHTOOL_TUNABLE_U16) 2449 return -EINVAL; 2450 break; 2451 default: 2452 return -EINVAL; 2453 } 2454 2455 return 0; 2456 } 2457 2458 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2459 { 2460 int ret; 2461 struct ethtool_tunable tuna; 2462 struct phy_device *phydev = dev->phydev; 2463 void *data; 2464 2465 if (!(phydev && phydev->drv && phydev->drv->get_tunable)) 2466 return -EOPNOTSUPP; 2467 2468 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2469 return -EFAULT; 2470 ret = ethtool_phy_tunable_valid(&tuna); 2471 if (ret) 2472 return ret; 2473 data = kmalloc(tuna.len, GFP_USER); 2474 if (!data) 2475 return -ENOMEM; 2476 mutex_lock(&phydev->lock); 2477 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2478 mutex_unlock(&phydev->lock); 2479 if (ret) 2480 goto out; 2481 useraddr += sizeof(tuna); 2482 ret = -EFAULT; 2483 if (copy_to_user(useraddr, data, tuna.len)) 2484 goto out; 2485 ret = 0; 2486 2487 out: 2488 kfree(data); 2489 return ret; 2490 } 2491 2492 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2493 { 2494 int ret; 2495 struct ethtool_tunable tuna; 2496 struct phy_device *phydev = dev->phydev; 2497 void *data; 2498 2499 if (!(phydev && phydev->drv && phydev->drv->set_tunable)) 2500 return -EOPNOTSUPP; 2501 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2502 return -EFAULT; 2503 ret = ethtool_phy_tunable_valid(&tuna); 2504 if (ret) 2505 return ret; 2506 useraddr += sizeof(tuna); 2507 data = memdup_user(useraddr, tuna.len); 2508 if (IS_ERR(data)) 2509 return PTR_ERR(data); 2510 mutex_lock(&phydev->lock); 2511 ret = phydev->drv->set_tunable(phydev, &tuna, data); 2512 mutex_unlock(&phydev->lock); 2513 2514 kfree(data); 2515 return ret; 2516 } 2517 2518 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 2519 { 2520 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 2521 int rc; 2522 2523 if (!dev->ethtool_ops->get_fecparam) 2524 return -EOPNOTSUPP; 2525 2526 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 2527 if (rc) 2528 return rc; 2529 2530 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 2531 return -EFAULT; 2532 return 0; 2533 } 2534 2535 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 2536 { 2537 struct ethtool_fecparam fecparam; 2538 2539 if (!dev->ethtool_ops->set_fecparam) 2540 return -EOPNOTSUPP; 2541 2542 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 2543 return -EFAULT; 2544 2545 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 2546 } 2547 2548 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 2549 2550 int dev_ethtool(struct net *net, struct ifreq *ifr) 2551 { 2552 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 2553 void __user *useraddr = ifr->ifr_data; 2554 u32 ethcmd, sub_cmd; 2555 int rc; 2556 netdev_features_t old_features; 2557 2558 if (!dev || !netif_device_present(dev)) 2559 return -ENODEV; 2560 2561 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 2562 return -EFAULT; 2563 2564 if (ethcmd == ETHTOOL_PERQUEUE) { 2565 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 2566 return -EFAULT; 2567 } else { 2568 sub_cmd = ethcmd; 2569 } 2570 /* Allow some commands to be done by anyone */ 2571 switch (sub_cmd) { 2572 case ETHTOOL_GSET: 2573 case ETHTOOL_GDRVINFO: 2574 case ETHTOOL_GMSGLVL: 2575 case ETHTOOL_GLINK: 2576 case ETHTOOL_GCOALESCE: 2577 case ETHTOOL_GRINGPARAM: 2578 case ETHTOOL_GPAUSEPARAM: 2579 case ETHTOOL_GRXCSUM: 2580 case ETHTOOL_GTXCSUM: 2581 case ETHTOOL_GSG: 2582 case ETHTOOL_GSSET_INFO: 2583 case ETHTOOL_GSTRINGS: 2584 case ETHTOOL_GSTATS: 2585 case ETHTOOL_GPHYSTATS: 2586 case ETHTOOL_GTSO: 2587 case ETHTOOL_GPERMADDR: 2588 case ETHTOOL_GUFO: 2589 case ETHTOOL_GGSO: 2590 case ETHTOOL_GGRO: 2591 case ETHTOOL_GFLAGS: 2592 case ETHTOOL_GPFLAGS: 2593 case ETHTOOL_GRXFH: 2594 case ETHTOOL_GRXRINGS: 2595 case ETHTOOL_GRXCLSRLCNT: 2596 case ETHTOOL_GRXCLSRULE: 2597 case ETHTOOL_GRXCLSRLALL: 2598 case ETHTOOL_GRXFHINDIR: 2599 case ETHTOOL_GRSSH: 2600 case ETHTOOL_GFEATURES: 2601 case ETHTOOL_GCHANNELS: 2602 case ETHTOOL_GET_TS_INFO: 2603 case ETHTOOL_GEEE: 2604 case ETHTOOL_GTUNABLE: 2605 case ETHTOOL_PHY_GTUNABLE: 2606 case ETHTOOL_GLINKSETTINGS: 2607 case ETHTOOL_GFECPARAM: 2608 break; 2609 default: 2610 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2611 return -EPERM; 2612 } 2613 2614 if (dev->ethtool_ops->begin) { 2615 rc = dev->ethtool_ops->begin(dev); 2616 if (rc < 0) 2617 return rc; 2618 } 2619 old_features = dev->features; 2620 2621 switch (ethcmd) { 2622 case ETHTOOL_GSET: 2623 rc = ethtool_get_settings(dev, useraddr); 2624 break; 2625 case ETHTOOL_SSET: 2626 rc = ethtool_set_settings(dev, useraddr); 2627 break; 2628 case ETHTOOL_GDRVINFO: 2629 rc = ethtool_get_drvinfo(dev, useraddr); 2630 break; 2631 case ETHTOOL_GREGS: 2632 rc = ethtool_get_regs(dev, useraddr); 2633 break; 2634 case ETHTOOL_GWOL: 2635 rc = ethtool_get_wol(dev, useraddr); 2636 break; 2637 case ETHTOOL_SWOL: 2638 rc = ethtool_set_wol(dev, useraddr); 2639 break; 2640 case ETHTOOL_GMSGLVL: 2641 rc = ethtool_get_value(dev, useraddr, ethcmd, 2642 dev->ethtool_ops->get_msglevel); 2643 break; 2644 case ETHTOOL_SMSGLVL: 2645 rc = ethtool_set_value_void(dev, useraddr, 2646 dev->ethtool_ops->set_msglevel); 2647 if (!rc) 2648 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 2649 break; 2650 case ETHTOOL_GEEE: 2651 rc = ethtool_get_eee(dev, useraddr); 2652 break; 2653 case ETHTOOL_SEEE: 2654 rc = ethtool_set_eee(dev, useraddr); 2655 break; 2656 case ETHTOOL_NWAY_RST: 2657 rc = ethtool_nway_reset(dev); 2658 break; 2659 case ETHTOOL_GLINK: 2660 rc = ethtool_get_link(dev, useraddr); 2661 break; 2662 case ETHTOOL_GEEPROM: 2663 rc = ethtool_get_eeprom(dev, useraddr); 2664 break; 2665 case ETHTOOL_SEEPROM: 2666 rc = ethtool_set_eeprom(dev, useraddr); 2667 break; 2668 case ETHTOOL_GCOALESCE: 2669 rc = ethtool_get_coalesce(dev, useraddr); 2670 break; 2671 case ETHTOOL_SCOALESCE: 2672 rc = ethtool_set_coalesce(dev, useraddr); 2673 break; 2674 case ETHTOOL_GRINGPARAM: 2675 rc = ethtool_get_ringparam(dev, useraddr); 2676 break; 2677 case ETHTOOL_SRINGPARAM: 2678 rc = ethtool_set_ringparam(dev, useraddr); 2679 break; 2680 case ETHTOOL_GPAUSEPARAM: 2681 rc = ethtool_get_pauseparam(dev, useraddr); 2682 break; 2683 case ETHTOOL_SPAUSEPARAM: 2684 rc = ethtool_set_pauseparam(dev, useraddr); 2685 break; 2686 case ETHTOOL_TEST: 2687 rc = ethtool_self_test(dev, useraddr); 2688 break; 2689 case ETHTOOL_GSTRINGS: 2690 rc = ethtool_get_strings(dev, useraddr); 2691 break; 2692 case ETHTOOL_PHYS_ID: 2693 rc = ethtool_phys_id(dev, useraddr); 2694 break; 2695 case ETHTOOL_GSTATS: 2696 rc = ethtool_get_stats(dev, useraddr); 2697 break; 2698 case ETHTOOL_GPERMADDR: 2699 rc = ethtool_get_perm_addr(dev, useraddr); 2700 break; 2701 case ETHTOOL_GFLAGS: 2702 rc = ethtool_get_value(dev, useraddr, ethcmd, 2703 __ethtool_get_flags); 2704 break; 2705 case ETHTOOL_SFLAGS: 2706 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 2707 break; 2708 case ETHTOOL_GPFLAGS: 2709 rc = ethtool_get_value(dev, useraddr, ethcmd, 2710 dev->ethtool_ops->get_priv_flags); 2711 if (!rc) 2712 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 2713 break; 2714 case ETHTOOL_SPFLAGS: 2715 rc = ethtool_set_value(dev, useraddr, 2716 dev->ethtool_ops->set_priv_flags); 2717 break; 2718 case ETHTOOL_GRXFH: 2719 case ETHTOOL_GRXRINGS: 2720 case ETHTOOL_GRXCLSRLCNT: 2721 case ETHTOOL_GRXCLSRULE: 2722 case ETHTOOL_GRXCLSRLALL: 2723 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 2724 break; 2725 case ETHTOOL_SRXFH: 2726 case ETHTOOL_SRXCLSRLDEL: 2727 case ETHTOOL_SRXCLSRLINS: 2728 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 2729 break; 2730 case ETHTOOL_FLASHDEV: 2731 rc = ethtool_flash_device(dev, useraddr); 2732 break; 2733 case ETHTOOL_RESET: 2734 rc = ethtool_reset(dev, useraddr); 2735 break; 2736 case ETHTOOL_GSSET_INFO: 2737 rc = ethtool_get_sset_info(dev, useraddr); 2738 break; 2739 case ETHTOOL_GRXFHINDIR: 2740 rc = ethtool_get_rxfh_indir(dev, useraddr); 2741 break; 2742 case ETHTOOL_SRXFHINDIR: 2743 rc = ethtool_set_rxfh_indir(dev, useraddr); 2744 break; 2745 case ETHTOOL_GRSSH: 2746 rc = ethtool_get_rxfh(dev, useraddr); 2747 break; 2748 case ETHTOOL_SRSSH: 2749 rc = ethtool_set_rxfh(dev, useraddr); 2750 break; 2751 case ETHTOOL_GFEATURES: 2752 rc = ethtool_get_features(dev, useraddr); 2753 break; 2754 case ETHTOOL_SFEATURES: 2755 rc = ethtool_set_features(dev, useraddr); 2756 break; 2757 case ETHTOOL_GTXCSUM: 2758 case ETHTOOL_GRXCSUM: 2759 case ETHTOOL_GSG: 2760 case ETHTOOL_GTSO: 2761 case ETHTOOL_GGSO: 2762 case ETHTOOL_GGRO: 2763 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 2764 break; 2765 case ETHTOOL_STXCSUM: 2766 case ETHTOOL_SRXCSUM: 2767 case ETHTOOL_SSG: 2768 case ETHTOOL_STSO: 2769 case ETHTOOL_SGSO: 2770 case ETHTOOL_SGRO: 2771 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 2772 break; 2773 case ETHTOOL_GCHANNELS: 2774 rc = ethtool_get_channels(dev, useraddr); 2775 break; 2776 case ETHTOOL_SCHANNELS: 2777 rc = ethtool_set_channels(dev, useraddr); 2778 break; 2779 case ETHTOOL_SET_DUMP: 2780 rc = ethtool_set_dump(dev, useraddr); 2781 break; 2782 case ETHTOOL_GET_DUMP_FLAG: 2783 rc = ethtool_get_dump_flag(dev, useraddr); 2784 break; 2785 case ETHTOOL_GET_DUMP_DATA: 2786 rc = ethtool_get_dump_data(dev, useraddr); 2787 break; 2788 case ETHTOOL_GET_TS_INFO: 2789 rc = ethtool_get_ts_info(dev, useraddr); 2790 break; 2791 case ETHTOOL_GMODULEINFO: 2792 rc = ethtool_get_module_info(dev, useraddr); 2793 break; 2794 case ETHTOOL_GMODULEEEPROM: 2795 rc = ethtool_get_module_eeprom(dev, useraddr); 2796 break; 2797 case ETHTOOL_GTUNABLE: 2798 rc = ethtool_get_tunable(dev, useraddr); 2799 break; 2800 case ETHTOOL_STUNABLE: 2801 rc = ethtool_set_tunable(dev, useraddr); 2802 break; 2803 case ETHTOOL_GPHYSTATS: 2804 rc = ethtool_get_phy_stats(dev, useraddr); 2805 break; 2806 case ETHTOOL_PERQUEUE: 2807 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 2808 break; 2809 case ETHTOOL_GLINKSETTINGS: 2810 rc = ethtool_get_link_ksettings(dev, useraddr); 2811 break; 2812 case ETHTOOL_SLINKSETTINGS: 2813 rc = ethtool_set_link_ksettings(dev, useraddr); 2814 break; 2815 case ETHTOOL_PHY_GTUNABLE: 2816 rc = get_phy_tunable(dev, useraddr); 2817 break; 2818 case ETHTOOL_PHY_STUNABLE: 2819 rc = set_phy_tunable(dev, useraddr); 2820 break; 2821 case ETHTOOL_GFECPARAM: 2822 rc = ethtool_get_fecparam(dev, useraddr); 2823 break; 2824 case ETHTOOL_SFECPARAM: 2825 rc = ethtool_set_fecparam(dev, useraddr); 2826 break; 2827 default: 2828 rc = -EOPNOTSUPP; 2829 } 2830 2831 if (dev->ethtool_ops->complete) 2832 dev->ethtool_ops->complete(dev); 2833 2834 if (old_features != dev->features) 2835 netdev_features_change(dev); 2836 2837 return rc; 2838 } 2839 2840 struct ethtool_rx_flow_key { 2841 struct flow_dissector_key_basic basic; 2842 union { 2843 struct flow_dissector_key_ipv4_addrs ipv4; 2844 struct flow_dissector_key_ipv6_addrs ipv6; 2845 }; 2846 struct flow_dissector_key_ports tp; 2847 struct flow_dissector_key_ip ip; 2848 struct flow_dissector_key_vlan vlan; 2849 struct flow_dissector_key_eth_addrs eth_addrs; 2850 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 2851 2852 struct ethtool_rx_flow_match { 2853 struct flow_dissector dissector; 2854 struct ethtool_rx_flow_key key; 2855 struct ethtool_rx_flow_key mask; 2856 }; 2857 2858 struct ethtool_rx_flow_rule * 2859 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 2860 { 2861 const struct ethtool_rx_flow_spec *fs = input->fs; 2862 static struct in6_addr zero_addr = {}; 2863 struct ethtool_rx_flow_match *match; 2864 struct ethtool_rx_flow_rule *flow; 2865 struct flow_action_entry *act; 2866 2867 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 2868 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 2869 if (!flow) 2870 return ERR_PTR(-ENOMEM); 2871 2872 /* ethtool_rx supports only one single action per rule. */ 2873 flow->rule = flow_rule_alloc(1); 2874 if (!flow->rule) { 2875 kfree(flow); 2876 return ERR_PTR(-ENOMEM); 2877 } 2878 2879 match = (struct ethtool_rx_flow_match *)flow->priv; 2880 flow->rule->match.dissector = &match->dissector; 2881 flow->rule->match.mask = &match->mask; 2882 flow->rule->match.key = &match->key; 2883 2884 match->mask.basic.n_proto = htons(0xffff); 2885 2886 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2887 case ETHER_FLOW: { 2888 const struct ethhdr *ether_spec, *ether_m_spec; 2889 2890 ether_spec = &fs->h_u.ether_spec; 2891 ether_m_spec = &fs->m_u.ether_spec; 2892 2893 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 2894 ether_addr_copy(match->key.eth_addrs.src, 2895 ether_spec->h_source); 2896 ether_addr_copy(match->mask.eth_addrs.src, 2897 ether_m_spec->h_source); 2898 } 2899 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 2900 ether_addr_copy(match->key.eth_addrs.dst, 2901 ether_spec->h_dest); 2902 ether_addr_copy(match->mask.eth_addrs.dst, 2903 ether_m_spec->h_dest); 2904 } 2905 if (ether_m_spec->h_proto) { 2906 match->key.basic.n_proto = ether_spec->h_proto; 2907 match->mask.basic.n_proto = ether_m_spec->h_proto; 2908 } 2909 } 2910 break; 2911 case TCP_V4_FLOW: 2912 case UDP_V4_FLOW: { 2913 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 2914 2915 match->key.basic.n_proto = htons(ETH_P_IP); 2916 2917 v4_spec = &fs->h_u.tcp_ip4_spec; 2918 v4_m_spec = &fs->m_u.tcp_ip4_spec; 2919 2920 if (v4_m_spec->ip4src) { 2921 match->key.ipv4.src = v4_spec->ip4src; 2922 match->mask.ipv4.src = v4_m_spec->ip4src; 2923 } 2924 if (v4_m_spec->ip4dst) { 2925 match->key.ipv4.dst = v4_spec->ip4dst; 2926 match->mask.ipv4.dst = v4_m_spec->ip4dst; 2927 } 2928 if (v4_m_spec->ip4src || 2929 v4_m_spec->ip4dst) { 2930 match->dissector.used_keys |= 2931 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 2932 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 2933 offsetof(struct ethtool_rx_flow_key, ipv4); 2934 } 2935 if (v4_m_spec->psrc) { 2936 match->key.tp.src = v4_spec->psrc; 2937 match->mask.tp.src = v4_m_spec->psrc; 2938 } 2939 if (v4_m_spec->pdst) { 2940 match->key.tp.dst = v4_spec->pdst; 2941 match->mask.tp.dst = v4_m_spec->pdst; 2942 } 2943 if (v4_m_spec->psrc || 2944 v4_m_spec->pdst) { 2945 match->dissector.used_keys |= 2946 BIT(FLOW_DISSECTOR_KEY_PORTS); 2947 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2948 offsetof(struct ethtool_rx_flow_key, tp); 2949 } 2950 if (v4_m_spec->tos) { 2951 match->key.ip.tos = v4_spec->tos; 2952 match->mask.ip.tos = v4_m_spec->tos; 2953 match->dissector.used_keys |= 2954 BIT(FLOW_DISSECTOR_KEY_IP); 2955 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2956 offsetof(struct ethtool_rx_flow_key, ip); 2957 } 2958 } 2959 break; 2960 case TCP_V6_FLOW: 2961 case UDP_V6_FLOW: { 2962 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 2963 2964 match->key.basic.n_proto = htons(ETH_P_IPV6); 2965 2966 v6_spec = &fs->h_u.tcp_ip6_spec; 2967 v6_m_spec = &fs->m_u.tcp_ip6_spec; 2968 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2969 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 2970 sizeof(match->key.ipv6.src)); 2971 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 2972 sizeof(match->mask.ipv6.src)); 2973 } 2974 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2975 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 2976 sizeof(match->key.ipv6.dst)); 2977 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 2978 sizeof(match->mask.ipv6.dst)); 2979 } 2980 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) || 2981 memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2982 match->dissector.used_keys |= 2983 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 2984 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 2985 offsetof(struct ethtool_rx_flow_key, ipv6); 2986 } 2987 if (v6_m_spec->psrc) { 2988 match->key.tp.src = v6_spec->psrc; 2989 match->mask.tp.src = v6_m_spec->psrc; 2990 } 2991 if (v6_m_spec->pdst) { 2992 match->key.tp.dst = v6_spec->pdst; 2993 match->mask.tp.dst = v6_m_spec->pdst; 2994 } 2995 if (v6_m_spec->psrc || 2996 v6_m_spec->pdst) { 2997 match->dissector.used_keys |= 2998 BIT(FLOW_DISSECTOR_KEY_PORTS); 2999 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3000 offsetof(struct ethtool_rx_flow_key, tp); 3001 } 3002 if (v6_m_spec->tclass) { 3003 match->key.ip.tos = v6_spec->tclass; 3004 match->mask.ip.tos = v6_m_spec->tclass; 3005 match->dissector.used_keys |= 3006 BIT(FLOW_DISSECTOR_KEY_IP); 3007 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3008 offsetof(struct ethtool_rx_flow_key, ip); 3009 } 3010 } 3011 break; 3012 default: 3013 ethtool_rx_flow_rule_destroy(flow); 3014 return ERR_PTR(-EINVAL); 3015 } 3016 3017 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3018 case TCP_V4_FLOW: 3019 case TCP_V6_FLOW: 3020 match->key.basic.ip_proto = IPPROTO_TCP; 3021 break; 3022 case UDP_V4_FLOW: 3023 case UDP_V6_FLOW: 3024 match->key.basic.ip_proto = IPPROTO_UDP; 3025 break; 3026 } 3027 match->mask.basic.ip_proto = 0xff; 3028 3029 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC); 3030 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3031 offsetof(struct ethtool_rx_flow_key, basic); 3032 3033 if (fs->flow_type & FLOW_EXT) { 3034 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3035 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3036 3037 if (ext_m_spec->vlan_etype) { 3038 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3039 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3040 } 3041 3042 if (ext_m_spec->vlan_tci) { 3043 match->key.vlan.vlan_id = 3044 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3045 match->mask.vlan.vlan_id = 3046 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3047 3048 match->key.vlan.vlan_dei = 3049 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3050 match->mask.vlan.vlan_dei = 3051 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3052 3053 match->key.vlan.vlan_priority = 3054 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3055 match->mask.vlan.vlan_priority = 3056 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3057 } 3058 3059 if (ext_m_spec->vlan_etype || 3060 ext_m_spec->vlan_tci) { 3061 match->dissector.used_keys |= 3062 BIT(FLOW_DISSECTOR_KEY_VLAN); 3063 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3064 offsetof(struct ethtool_rx_flow_key, vlan); 3065 } 3066 } 3067 if (fs->flow_type & FLOW_MAC_EXT) { 3068 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3069 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3070 3071 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3072 ETH_ALEN); 3073 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3074 ETH_ALEN); 3075 3076 match->dissector.used_keys |= 3077 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3078 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3079 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3080 } 3081 3082 act = &flow->rule->action.entries[0]; 3083 switch (fs->ring_cookie) { 3084 case RX_CLS_FLOW_DISC: 3085 act->id = FLOW_ACTION_DROP; 3086 break; 3087 case RX_CLS_FLOW_WAKE: 3088 act->id = FLOW_ACTION_WAKE; 3089 break; 3090 default: 3091 act->id = FLOW_ACTION_QUEUE; 3092 if (fs->flow_type & FLOW_RSS) 3093 act->queue.ctx = input->rss_ctx; 3094 3095 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3096 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3097 break; 3098 } 3099 3100 return flow; 3101 } 3102 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3103 3104 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3105 { 3106 kfree(flow->rule); 3107 kfree(flow); 3108 } 3109 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3110