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/vermagic.h> 21 #include <linux/vmalloc.h> 22 #include <linux/sfp.h> 23 #include <linux/slab.h> 24 #include <linux/rtnetlink.h> 25 #include <linux/sched/signal.h> 26 #include <linux/net.h> 27 #include <net/devlink.h> 28 #include <net/xdp_sock.h> 29 #include <net/flow_offload.h> 30 #include <linux/ethtool_netlink.h> 31 32 #include "common.h" 33 34 /* 35 * Some useful ethtool_ops methods that're device independent. 36 * If we find that all drivers want to do the same thing here, 37 * we can turn these into dev_() function calls. 38 */ 39 40 u32 ethtool_op_get_link(struct net_device *dev) 41 { 42 return netif_carrier_ok(dev) ? 1 : 0; 43 } 44 EXPORT_SYMBOL(ethtool_op_get_link); 45 46 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) 47 { 48 info->so_timestamping = 49 SOF_TIMESTAMPING_TX_SOFTWARE | 50 SOF_TIMESTAMPING_RX_SOFTWARE | 51 SOF_TIMESTAMPING_SOFTWARE; 52 info->phc_index = -1; 53 return 0; 54 } 55 EXPORT_SYMBOL(ethtool_op_get_ts_info); 56 57 /* Handlers for each ethtool command */ 58 59 static int ethtool_get_features(struct net_device *dev, void __user *useraddr) 60 { 61 struct ethtool_gfeatures cmd = { 62 .cmd = ETHTOOL_GFEATURES, 63 .size = ETHTOOL_DEV_FEATURE_WORDS, 64 }; 65 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 66 u32 __user *sizeaddr; 67 u32 copy_size; 68 int i; 69 70 /* in case feature bits run out again */ 71 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t)); 72 73 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 74 features[i].available = (u32)(dev->hw_features >> (32 * i)); 75 features[i].requested = (u32)(dev->wanted_features >> (32 * i)); 76 features[i].active = (u32)(dev->features >> (32 * i)); 77 features[i].never_changed = 78 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i)); 79 } 80 81 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size); 82 if (get_user(copy_size, sizeaddr)) 83 return -EFAULT; 84 85 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS) 86 copy_size = ETHTOOL_DEV_FEATURE_WORDS; 87 88 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 89 return -EFAULT; 90 useraddr += sizeof(cmd); 91 if (copy_to_user(useraddr, features, copy_size * sizeof(*features))) 92 return -EFAULT; 93 94 return 0; 95 } 96 97 static int ethtool_set_features(struct net_device *dev, void __user *useraddr) 98 { 99 struct ethtool_sfeatures cmd; 100 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 101 netdev_features_t wanted = 0, valid = 0; 102 int i, ret = 0; 103 104 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 105 return -EFAULT; 106 useraddr += sizeof(cmd); 107 108 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS) 109 return -EINVAL; 110 111 if (copy_from_user(features, useraddr, sizeof(features))) 112 return -EFAULT; 113 114 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 115 valid |= (netdev_features_t)features[i].valid << (32 * i); 116 wanted |= (netdev_features_t)features[i].requested << (32 * i); 117 } 118 119 if (valid & ~NETIF_F_ETHTOOL_BITS) 120 return -EINVAL; 121 122 if (valid & ~dev->hw_features) { 123 valid &= dev->hw_features; 124 ret |= ETHTOOL_F_UNSUPPORTED; 125 } 126 127 dev->wanted_features &= ~valid; 128 dev->wanted_features |= wanted & valid; 129 __netdev_update_features(dev); 130 131 if ((dev->wanted_features ^ dev->features) & valid) 132 ret |= ETHTOOL_F_WISH; 133 134 return ret; 135 } 136 137 static int __ethtool_get_sset_count(struct net_device *dev, int sset) 138 { 139 const struct ethtool_ops *ops = dev->ethtool_ops; 140 141 if (sset == ETH_SS_FEATURES) 142 return ARRAY_SIZE(netdev_features_strings); 143 144 if (sset == ETH_SS_RSS_HASH_FUNCS) 145 return ARRAY_SIZE(rss_hash_func_strings); 146 147 if (sset == ETH_SS_TUNABLES) 148 return ARRAY_SIZE(tunable_strings); 149 150 if (sset == ETH_SS_PHY_TUNABLES) 151 return ARRAY_SIZE(phy_tunable_strings); 152 153 if (sset == ETH_SS_PHY_STATS && dev->phydev && 154 !ops->get_ethtool_phy_stats) 155 return phy_ethtool_get_sset_count(dev->phydev); 156 157 if (sset == ETH_SS_LINK_MODES) 158 return __ETHTOOL_LINK_MODE_MASK_NBITS; 159 160 if (ops->get_sset_count && ops->get_strings) 161 return ops->get_sset_count(dev, sset); 162 else 163 return -EOPNOTSUPP; 164 } 165 166 static void __ethtool_get_strings(struct net_device *dev, 167 u32 stringset, u8 *data) 168 { 169 const struct ethtool_ops *ops = dev->ethtool_ops; 170 171 if (stringset == ETH_SS_FEATURES) 172 memcpy(data, netdev_features_strings, 173 sizeof(netdev_features_strings)); 174 else if (stringset == ETH_SS_RSS_HASH_FUNCS) 175 memcpy(data, rss_hash_func_strings, 176 sizeof(rss_hash_func_strings)); 177 else if (stringset == ETH_SS_TUNABLES) 178 memcpy(data, tunable_strings, sizeof(tunable_strings)); 179 else if (stringset == ETH_SS_PHY_TUNABLES) 180 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings)); 181 else if (stringset == ETH_SS_PHY_STATS && dev->phydev && 182 !ops->get_ethtool_phy_stats) 183 phy_ethtool_get_strings(dev->phydev, data); 184 else if (stringset == ETH_SS_LINK_MODES) 185 memcpy(data, link_mode_names, 186 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN); 187 else 188 /* ops->get_strings is valid because checked earlier */ 189 ops->get_strings(dev, stringset, data); 190 } 191 192 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) 193 { 194 /* feature masks of legacy discrete ethtool ops */ 195 196 switch (eth_cmd) { 197 case ETHTOOL_GTXCSUM: 198 case ETHTOOL_STXCSUM: 199 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC | 200 NETIF_F_SCTP_CRC; 201 case ETHTOOL_GRXCSUM: 202 case ETHTOOL_SRXCSUM: 203 return NETIF_F_RXCSUM; 204 case ETHTOOL_GSG: 205 case ETHTOOL_SSG: 206 return NETIF_F_SG | NETIF_F_FRAGLIST; 207 case ETHTOOL_GTSO: 208 case ETHTOOL_STSO: 209 return NETIF_F_ALL_TSO; 210 case ETHTOOL_GGSO: 211 case ETHTOOL_SGSO: 212 return NETIF_F_GSO; 213 case ETHTOOL_GGRO: 214 case ETHTOOL_SGRO: 215 return NETIF_F_GRO; 216 default: 217 BUG(); 218 } 219 } 220 221 static int ethtool_get_one_feature(struct net_device *dev, 222 char __user *useraddr, u32 ethcmd) 223 { 224 netdev_features_t mask = ethtool_get_feature_mask(ethcmd); 225 struct ethtool_value edata = { 226 .cmd = ethcmd, 227 .data = !!(dev->features & mask), 228 }; 229 230 if (copy_to_user(useraddr, &edata, sizeof(edata))) 231 return -EFAULT; 232 return 0; 233 } 234 235 static int ethtool_set_one_feature(struct net_device *dev, 236 void __user *useraddr, u32 ethcmd) 237 { 238 struct ethtool_value edata; 239 netdev_features_t mask; 240 241 if (copy_from_user(&edata, useraddr, sizeof(edata))) 242 return -EFAULT; 243 244 mask = ethtool_get_feature_mask(ethcmd); 245 mask &= dev->hw_features; 246 if (!mask) 247 return -EOPNOTSUPP; 248 249 if (edata.data) 250 dev->wanted_features |= mask; 251 else 252 dev->wanted_features &= ~mask; 253 254 __netdev_update_features(dev); 255 256 return 0; 257 } 258 259 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ 260 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) 261 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \ 262 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \ 263 NETIF_F_RXHASH) 264 265 static u32 __ethtool_get_flags(struct net_device *dev) 266 { 267 u32 flags = 0; 268 269 if (dev->features & NETIF_F_LRO) 270 flags |= ETH_FLAG_LRO; 271 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX) 272 flags |= ETH_FLAG_RXVLAN; 273 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) 274 flags |= ETH_FLAG_TXVLAN; 275 if (dev->features & NETIF_F_NTUPLE) 276 flags |= ETH_FLAG_NTUPLE; 277 if (dev->features & NETIF_F_RXHASH) 278 flags |= ETH_FLAG_RXHASH; 279 280 return flags; 281 } 282 283 static int __ethtool_set_flags(struct net_device *dev, u32 data) 284 { 285 netdev_features_t features = 0, changed; 286 287 if (data & ~ETH_ALL_FLAGS) 288 return -EINVAL; 289 290 if (data & ETH_FLAG_LRO) 291 features |= NETIF_F_LRO; 292 if (data & ETH_FLAG_RXVLAN) 293 features |= NETIF_F_HW_VLAN_CTAG_RX; 294 if (data & ETH_FLAG_TXVLAN) 295 features |= NETIF_F_HW_VLAN_CTAG_TX; 296 if (data & ETH_FLAG_NTUPLE) 297 features |= NETIF_F_NTUPLE; 298 if (data & ETH_FLAG_RXHASH) 299 features |= NETIF_F_RXHASH; 300 301 /* allow changing only bits set in hw_features */ 302 changed = (features ^ dev->features) & ETH_ALL_FEATURES; 303 if (changed & ~dev->hw_features) 304 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; 305 306 dev->wanted_features = 307 (dev->wanted_features & ~changed) | (features & changed); 308 309 __netdev_update_features(dev); 310 311 return 0; 312 } 313 314 /* Given two link masks, AND them together and save the result in dst. */ 315 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst, 316 struct ethtool_link_ksettings *src) 317 { 318 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS); 319 unsigned int idx = 0; 320 321 for (; idx < size; idx++) { 322 dst->link_modes.supported[idx] &= 323 src->link_modes.supported[idx]; 324 dst->link_modes.advertising[idx] &= 325 src->link_modes.advertising[idx]; 326 } 327 } 328 EXPORT_SYMBOL(ethtool_intersect_link_masks); 329 330 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst, 331 u32 legacy_u32) 332 { 333 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS); 334 dst[0] = legacy_u32; 335 } 336 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode); 337 338 /* return false if src had higher bits set. lower bits always updated. */ 339 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, 340 const unsigned long *src) 341 { 342 bool retval = true; 343 344 /* TODO: following test will soon always be true */ 345 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) { 346 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext); 347 348 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 349 bitmap_fill(ext, 32); 350 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 351 if (bitmap_intersects(ext, src, 352 __ETHTOOL_LINK_MODE_MASK_NBITS)) { 353 /* src mask goes beyond bit 31 */ 354 retval = false; 355 } 356 } 357 *legacy_u32 = src[0]; 358 return retval; 359 } 360 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); 361 362 /* return false if ksettings link modes had higher bits 363 * set. legacy_settings always updated (best effort) 364 */ 365 static bool 366 convert_link_ksettings_to_legacy_settings( 367 struct ethtool_cmd *legacy_settings, 368 const struct ethtool_link_ksettings *link_ksettings) 369 { 370 bool retval = true; 371 372 memset(legacy_settings, 0, sizeof(*legacy_settings)); 373 /* this also clears the deprecated fields in legacy structure: 374 * __u8 transceiver; 375 * __u32 maxtxpkt; 376 * __u32 maxrxpkt; 377 */ 378 379 retval &= ethtool_convert_link_mode_to_legacy_u32( 380 &legacy_settings->supported, 381 link_ksettings->link_modes.supported); 382 retval &= ethtool_convert_link_mode_to_legacy_u32( 383 &legacy_settings->advertising, 384 link_ksettings->link_modes.advertising); 385 retval &= ethtool_convert_link_mode_to_legacy_u32( 386 &legacy_settings->lp_advertising, 387 link_ksettings->link_modes.lp_advertising); 388 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed); 389 legacy_settings->duplex 390 = link_ksettings->base.duplex; 391 legacy_settings->port 392 = link_ksettings->base.port; 393 legacy_settings->phy_address 394 = link_ksettings->base.phy_address; 395 legacy_settings->autoneg 396 = link_ksettings->base.autoneg; 397 legacy_settings->mdio_support 398 = link_ksettings->base.mdio_support; 399 legacy_settings->eth_tp_mdix 400 = link_ksettings->base.eth_tp_mdix; 401 legacy_settings->eth_tp_mdix_ctrl 402 = link_ksettings->base.eth_tp_mdix_ctrl; 403 legacy_settings->transceiver 404 = link_ksettings->base.transceiver; 405 return retval; 406 } 407 408 /* number of 32-bit words to store the user's link mode bitmaps */ 409 #define __ETHTOOL_LINK_MODE_MASK_NU32 \ 410 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32) 411 412 /* layout of the struct passed from/to userland */ 413 struct ethtool_link_usettings { 414 struct ethtool_link_settings base; 415 struct { 416 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32]; 417 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 418 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 419 } link_modes; 420 }; 421 422 /* Internal kernel helper to query a device ethtool_link_settings. */ 423 int __ethtool_get_link_ksettings(struct net_device *dev, 424 struct ethtool_link_ksettings *link_ksettings) 425 { 426 ASSERT_RTNL(); 427 428 if (!dev->ethtool_ops->get_link_ksettings) 429 return -EOPNOTSUPP; 430 431 memset(link_ksettings, 0, sizeof(*link_ksettings)); 432 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings); 433 } 434 EXPORT_SYMBOL(__ethtool_get_link_ksettings); 435 436 /* convert ethtool_link_usettings in user space to a kernel internal 437 * ethtool_link_ksettings. return 0 on success, errno on error. 438 */ 439 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to, 440 const void __user *from) 441 { 442 struct ethtool_link_usettings link_usettings; 443 444 if (copy_from_user(&link_usettings, from, sizeof(link_usettings))) 445 return -EFAULT; 446 447 memcpy(&to->base, &link_usettings.base, sizeof(to->base)); 448 bitmap_from_arr32(to->link_modes.supported, 449 link_usettings.link_modes.supported, 450 __ETHTOOL_LINK_MODE_MASK_NBITS); 451 bitmap_from_arr32(to->link_modes.advertising, 452 link_usettings.link_modes.advertising, 453 __ETHTOOL_LINK_MODE_MASK_NBITS); 454 bitmap_from_arr32(to->link_modes.lp_advertising, 455 link_usettings.link_modes.lp_advertising, 456 __ETHTOOL_LINK_MODE_MASK_NBITS); 457 458 return 0; 459 } 460 461 /* Check if the user is trying to change anything besides speed/duplex */ 462 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd) 463 { 464 struct ethtool_link_settings base2 = {}; 465 466 base2.speed = cmd->base.speed; 467 base2.port = PORT_OTHER; 468 base2.duplex = cmd->base.duplex; 469 base2.cmd = cmd->base.cmd; 470 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords; 471 472 return !memcmp(&base2, &cmd->base, sizeof(base2)) && 473 bitmap_empty(cmd->link_modes.supported, 474 __ETHTOOL_LINK_MODE_MASK_NBITS) && 475 bitmap_empty(cmd->link_modes.lp_advertising, 476 __ETHTOOL_LINK_MODE_MASK_NBITS); 477 } 478 479 /* convert a kernel internal ethtool_link_ksettings to 480 * ethtool_link_usettings in user space. return 0 on success, errno on 481 * error. 482 */ 483 static int 484 store_link_ksettings_for_user(void __user *to, 485 const struct ethtool_link_ksettings *from) 486 { 487 struct ethtool_link_usettings link_usettings; 488 489 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings)); 490 bitmap_to_arr32(link_usettings.link_modes.supported, 491 from->link_modes.supported, 492 __ETHTOOL_LINK_MODE_MASK_NBITS); 493 bitmap_to_arr32(link_usettings.link_modes.advertising, 494 from->link_modes.advertising, 495 __ETHTOOL_LINK_MODE_MASK_NBITS); 496 bitmap_to_arr32(link_usettings.link_modes.lp_advertising, 497 from->link_modes.lp_advertising, 498 __ETHTOOL_LINK_MODE_MASK_NBITS); 499 500 if (copy_to_user(to, &link_usettings, sizeof(link_usettings))) 501 return -EFAULT; 502 503 return 0; 504 } 505 506 /* Query device for its ethtool_link_settings. */ 507 static int ethtool_get_link_ksettings(struct net_device *dev, 508 void __user *useraddr) 509 { 510 int err = 0; 511 struct ethtool_link_ksettings link_ksettings; 512 513 ASSERT_RTNL(); 514 if (!dev->ethtool_ops->get_link_ksettings) 515 return -EOPNOTSUPP; 516 517 /* handle bitmap nbits handshake */ 518 if (copy_from_user(&link_ksettings.base, useraddr, 519 sizeof(link_ksettings.base))) 520 return -EFAULT; 521 522 if (__ETHTOOL_LINK_MODE_MASK_NU32 523 != link_ksettings.base.link_mode_masks_nwords) { 524 /* wrong link mode nbits requested */ 525 memset(&link_ksettings, 0, sizeof(link_ksettings)); 526 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 527 /* send back number of words required as negative val */ 528 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX, 529 "need too many bits for link modes!"); 530 link_ksettings.base.link_mode_masks_nwords 531 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32); 532 533 /* copy the base fields back to user, not the link 534 * mode bitmaps 535 */ 536 if (copy_to_user(useraddr, &link_ksettings.base, 537 sizeof(link_ksettings.base))) 538 return -EFAULT; 539 540 return 0; 541 } 542 543 /* handshake successful: user/kernel agree on 544 * link_mode_masks_nwords 545 */ 546 547 memset(&link_ksettings, 0, sizeof(link_ksettings)); 548 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 549 if (err < 0) 550 return err; 551 552 /* make sure we tell the right values to user */ 553 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 554 link_ksettings.base.link_mode_masks_nwords 555 = __ETHTOOL_LINK_MODE_MASK_NU32; 556 557 return store_link_ksettings_for_user(useraddr, &link_ksettings); 558 } 559 560 /* Update device ethtool_link_settings. */ 561 static int ethtool_set_link_ksettings(struct net_device *dev, 562 void __user *useraddr) 563 { 564 int err; 565 struct ethtool_link_ksettings link_ksettings; 566 567 ASSERT_RTNL(); 568 569 if (!dev->ethtool_ops->set_link_ksettings) 570 return -EOPNOTSUPP; 571 572 /* make sure nbits field has expected value */ 573 if (copy_from_user(&link_ksettings.base, useraddr, 574 sizeof(link_ksettings.base))) 575 return -EFAULT; 576 577 if (__ETHTOOL_LINK_MODE_MASK_NU32 578 != link_ksettings.base.link_mode_masks_nwords) 579 return -EINVAL; 580 581 /* copy the whole structure, now that we know it has expected 582 * format 583 */ 584 err = load_link_ksettings_from_user(&link_ksettings, useraddr); 585 if (err) 586 return err; 587 588 /* re-check nwords field, just in case */ 589 if (__ETHTOOL_LINK_MODE_MASK_NU32 590 != link_ksettings.base.link_mode_masks_nwords) 591 return -EINVAL; 592 593 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 594 if (err >= 0) { 595 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 596 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 597 } 598 return err; 599 } 600 601 int ethtool_virtdev_set_link_ksettings(struct net_device *dev, 602 const struct ethtool_link_ksettings *cmd, 603 u32 *dev_speed, u8 *dev_duplex) 604 { 605 u32 speed; 606 u8 duplex; 607 608 speed = cmd->base.speed; 609 duplex = cmd->base.duplex; 610 /* don't allow custom speed and duplex */ 611 if (!ethtool_validate_speed(speed) || 612 !ethtool_validate_duplex(duplex) || 613 !ethtool_virtdev_validate_cmd(cmd)) 614 return -EINVAL; 615 *dev_speed = speed; 616 *dev_duplex = duplex; 617 618 return 0; 619 } 620 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings); 621 622 /* Query device for its ethtool_cmd settings. 623 * 624 * Backward compatibility note: for compatibility with legacy ethtool, this is 625 * now implemented via get_link_ksettings. When driver reports higher link mode 626 * bits, a kernel warning is logged once (with name of 1st driver/device) to 627 * recommend user to upgrade ethtool, but the command is successful (only the 628 * lower link mode bits reported back to user). Deprecated fields from 629 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero. 630 */ 631 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) 632 { 633 struct ethtool_link_ksettings link_ksettings; 634 struct ethtool_cmd cmd; 635 int err; 636 637 ASSERT_RTNL(); 638 if (!dev->ethtool_ops->get_link_ksettings) 639 return -EOPNOTSUPP; 640 641 memset(&link_ksettings, 0, sizeof(link_ksettings)); 642 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 643 if (err < 0) 644 return err; 645 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings); 646 647 /* send a sensible cmd tag back to user */ 648 cmd.cmd = ETHTOOL_GSET; 649 650 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 651 return -EFAULT; 652 653 return 0; 654 } 655 656 /* Update device link settings with given ethtool_cmd. 657 * 658 * Backward compatibility note: for compatibility with legacy ethtool, this is 659 * now always implemented via set_link_settings. When user's request updates 660 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel 661 * warning is logged once (with name of 1st driver/device) to recommend user to 662 * upgrade ethtool, and the request is rejected. 663 */ 664 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) 665 { 666 struct ethtool_link_ksettings link_ksettings; 667 struct ethtool_cmd cmd; 668 int ret; 669 670 ASSERT_RTNL(); 671 672 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 673 return -EFAULT; 674 if (!dev->ethtool_ops->set_link_ksettings) 675 return -EOPNOTSUPP; 676 677 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd)) 678 return -EINVAL; 679 link_ksettings.base.link_mode_masks_nwords = 680 __ETHTOOL_LINK_MODE_MASK_NU32; 681 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 682 if (ret >= 0) { 683 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 684 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 685 } 686 return ret; 687 } 688 689 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev, 690 void __user *useraddr) 691 { 692 struct ethtool_drvinfo info; 693 const struct ethtool_ops *ops = dev->ethtool_ops; 694 695 memset(&info, 0, sizeof(info)); 696 info.cmd = ETHTOOL_GDRVINFO; 697 strlcpy(info.version, UTS_RELEASE, sizeof(info.version)); 698 if (ops->get_drvinfo) { 699 ops->get_drvinfo(dev, &info); 700 } else if (dev->dev.parent && dev->dev.parent->driver) { 701 strlcpy(info.bus_info, dev_name(dev->dev.parent), 702 sizeof(info.bus_info)); 703 strlcpy(info.driver, dev->dev.parent->driver->name, 704 sizeof(info.driver)); 705 } else { 706 return -EOPNOTSUPP; 707 } 708 709 /* 710 * this method of obtaining string set info is deprecated; 711 * Use ETHTOOL_GSSET_INFO instead. 712 */ 713 if (ops->get_sset_count) { 714 int rc; 715 716 rc = ops->get_sset_count(dev, ETH_SS_TEST); 717 if (rc >= 0) 718 info.testinfo_len = rc; 719 rc = ops->get_sset_count(dev, ETH_SS_STATS); 720 if (rc >= 0) 721 info.n_stats = rc; 722 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); 723 if (rc >= 0) 724 info.n_priv_flags = rc; 725 } 726 if (ops->get_regs_len) { 727 int ret = ops->get_regs_len(dev); 728 729 if (ret > 0) 730 info.regdump_len = ret; 731 } 732 733 if (ops->get_eeprom_len) 734 info.eedump_len = ops->get_eeprom_len(dev); 735 736 if (!info.fw_version[0]) 737 devlink_compat_running_version(dev, info.fw_version, 738 sizeof(info.fw_version)); 739 740 if (copy_to_user(useraddr, &info, sizeof(info))) 741 return -EFAULT; 742 return 0; 743 } 744 745 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, 746 void __user *useraddr) 747 { 748 struct ethtool_sset_info info; 749 u64 sset_mask; 750 int i, idx = 0, n_bits = 0, ret, rc; 751 u32 *info_buf = NULL; 752 753 if (copy_from_user(&info, useraddr, sizeof(info))) 754 return -EFAULT; 755 756 /* store copy of mask, because we zero struct later on */ 757 sset_mask = info.sset_mask; 758 if (!sset_mask) 759 return 0; 760 761 /* calculate size of return buffer */ 762 n_bits = hweight64(sset_mask); 763 764 memset(&info, 0, sizeof(info)); 765 info.cmd = ETHTOOL_GSSET_INFO; 766 767 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER); 768 if (!info_buf) 769 return -ENOMEM; 770 771 /* 772 * fill return buffer based on input bitmask and successful 773 * get_sset_count return 774 */ 775 for (i = 0; i < 64; i++) { 776 if (!(sset_mask & (1ULL << i))) 777 continue; 778 779 rc = __ethtool_get_sset_count(dev, i); 780 if (rc >= 0) { 781 info.sset_mask |= (1ULL << i); 782 info_buf[idx++] = rc; 783 } 784 } 785 786 ret = -EFAULT; 787 if (copy_to_user(useraddr, &info, sizeof(info))) 788 goto out; 789 790 useraddr += offsetof(struct ethtool_sset_info, data); 791 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32))) 792 goto out; 793 794 ret = 0; 795 796 out: 797 kfree(info_buf); 798 return ret; 799 } 800 801 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, 802 u32 cmd, void __user *useraddr) 803 { 804 struct ethtool_rxnfc info; 805 size_t info_size = sizeof(info); 806 int rc; 807 808 if (!dev->ethtool_ops->set_rxnfc) 809 return -EOPNOTSUPP; 810 811 /* struct ethtool_rxnfc was originally defined for 812 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 813 * members. User-space might still be using that 814 * definition. */ 815 if (cmd == ETHTOOL_SRXFH) 816 info_size = (offsetof(struct ethtool_rxnfc, data) + 817 sizeof(info.data)); 818 819 if (copy_from_user(&info, useraddr, info_size)) 820 return -EFAULT; 821 822 rc = dev->ethtool_ops->set_rxnfc(dev, &info); 823 if (rc) 824 return rc; 825 826 if (cmd == ETHTOOL_SRXCLSRLINS && 827 copy_to_user(useraddr, &info, info_size)) 828 return -EFAULT; 829 830 return 0; 831 } 832 833 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 834 u32 cmd, void __user *useraddr) 835 { 836 struct ethtool_rxnfc info; 837 size_t info_size = sizeof(info); 838 const struct ethtool_ops *ops = dev->ethtool_ops; 839 int ret; 840 void *rule_buf = NULL; 841 842 if (!ops->get_rxnfc) 843 return -EOPNOTSUPP; 844 845 /* struct ethtool_rxnfc was originally defined for 846 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 847 * members. User-space might still be using that 848 * definition. */ 849 if (cmd == ETHTOOL_GRXFH) 850 info_size = (offsetof(struct ethtool_rxnfc, data) + 851 sizeof(info.data)); 852 853 if (copy_from_user(&info, useraddr, info_size)) 854 return -EFAULT; 855 856 /* If FLOW_RSS was requested then user-space must be using the 857 * new definition, as FLOW_RSS is newer. 858 */ 859 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) { 860 info_size = sizeof(info); 861 if (copy_from_user(&info, useraddr, info_size)) 862 return -EFAULT; 863 /* Since malicious users may modify the original data, 864 * we need to check whether FLOW_RSS is still requested. 865 */ 866 if (!(info.flow_type & FLOW_RSS)) 867 return -EINVAL; 868 } 869 870 if (info.cmd != cmd) 871 return -EINVAL; 872 873 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 874 if (info.rule_cnt > 0) { 875 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 876 rule_buf = kcalloc(info.rule_cnt, sizeof(u32), 877 GFP_USER); 878 if (!rule_buf) 879 return -ENOMEM; 880 } 881 } 882 883 ret = ops->get_rxnfc(dev, &info, rule_buf); 884 if (ret < 0) 885 goto err_out; 886 887 ret = -EFAULT; 888 if (copy_to_user(useraddr, &info, info_size)) 889 goto err_out; 890 891 if (rule_buf) { 892 useraddr += offsetof(struct ethtool_rxnfc, rule_locs); 893 if (copy_to_user(useraddr, rule_buf, 894 info.rule_cnt * sizeof(u32))) 895 goto err_out; 896 } 897 ret = 0; 898 899 err_out: 900 kfree(rule_buf); 901 902 return ret; 903 } 904 905 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 906 struct ethtool_rxnfc *rx_rings, 907 u32 size) 908 { 909 int i; 910 911 if (copy_from_user(indir, useraddr, size * sizeof(indir[0]))) 912 return -EFAULT; 913 914 /* Validate ring indices */ 915 for (i = 0; i < size; i++) 916 if (indir[i] >= rx_rings->data) 917 return -EINVAL; 918 919 return 0; 920 } 921 922 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; 923 924 void netdev_rss_key_fill(void *buffer, size_t len) 925 { 926 BUG_ON(len > sizeof(netdev_rss_key)); 927 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 928 memcpy(buffer, netdev_rss_key, len); 929 } 930 EXPORT_SYMBOL(netdev_rss_key_fill); 931 932 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 933 void __user *useraddr) 934 { 935 u32 user_size, dev_size; 936 u32 *indir; 937 int ret; 938 939 if (!dev->ethtool_ops->get_rxfh_indir_size || 940 !dev->ethtool_ops->get_rxfh) 941 return -EOPNOTSUPP; 942 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 943 if (dev_size == 0) 944 return -EOPNOTSUPP; 945 946 if (copy_from_user(&user_size, 947 useraddr + offsetof(struct ethtool_rxfh_indir, size), 948 sizeof(user_size))) 949 return -EFAULT; 950 951 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 952 &dev_size, sizeof(dev_size))) 953 return -EFAULT; 954 955 /* If the user buffer size is 0, this is just a query for the 956 * device table size. Otherwise, if it's smaller than the 957 * device table size it's an error. 958 */ 959 if (user_size < dev_size) 960 return user_size == 0 ? 0 : -EINVAL; 961 962 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 963 if (!indir) 964 return -ENOMEM; 965 966 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL); 967 if (ret) 968 goto out; 969 970 if (copy_to_user(useraddr + 971 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 972 indir, dev_size * sizeof(indir[0]))) 973 ret = -EFAULT; 974 975 out: 976 kfree(indir); 977 return ret; 978 } 979 980 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 981 void __user *useraddr) 982 { 983 struct ethtool_rxnfc rx_rings; 984 u32 user_size, dev_size, i; 985 u32 *indir; 986 const struct ethtool_ops *ops = dev->ethtool_ops; 987 int ret; 988 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 989 990 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 991 !ops->get_rxnfc) 992 return -EOPNOTSUPP; 993 994 dev_size = ops->get_rxfh_indir_size(dev); 995 if (dev_size == 0) 996 return -EOPNOTSUPP; 997 998 if (copy_from_user(&user_size, 999 useraddr + offsetof(struct ethtool_rxfh_indir, size), 1000 sizeof(user_size))) 1001 return -EFAULT; 1002 1003 if (user_size != 0 && user_size != dev_size) 1004 return -EINVAL; 1005 1006 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 1007 if (!indir) 1008 return -ENOMEM; 1009 1010 rx_rings.cmd = ETHTOOL_GRXRINGS; 1011 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1012 if (ret) 1013 goto out; 1014 1015 if (user_size == 0) { 1016 for (i = 0; i < dev_size; i++) 1017 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1018 } else { 1019 ret = ethtool_copy_validate_indir(indir, 1020 useraddr + ringidx_offset, 1021 &rx_rings, 1022 dev_size); 1023 if (ret) 1024 goto out; 1025 } 1026 1027 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE); 1028 if (ret) 1029 goto out; 1030 1031 /* indicate whether rxfh was set to default */ 1032 if (user_size == 0) 1033 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1034 else 1035 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1036 1037 out: 1038 kfree(indir); 1039 return ret; 1040 } 1041 1042 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 1043 void __user *useraddr) 1044 { 1045 int ret; 1046 const struct ethtool_ops *ops = dev->ethtool_ops; 1047 u32 user_indir_size, user_key_size; 1048 u32 dev_indir_size = 0, dev_key_size = 0; 1049 struct ethtool_rxfh rxfh; 1050 u32 total_size; 1051 u32 indir_bytes; 1052 u32 *indir = NULL; 1053 u8 dev_hfunc = 0; 1054 u8 *hkey = NULL; 1055 u8 *rss_config; 1056 1057 if (!ops->get_rxfh) 1058 return -EOPNOTSUPP; 1059 1060 if (ops->get_rxfh_indir_size) 1061 dev_indir_size = ops->get_rxfh_indir_size(dev); 1062 if (ops->get_rxfh_key_size) 1063 dev_key_size = ops->get_rxfh_key_size(dev); 1064 1065 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1066 return -EFAULT; 1067 user_indir_size = rxfh.indir_size; 1068 user_key_size = rxfh.key_size; 1069 1070 /* Check that reserved fields are 0 for now */ 1071 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1072 return -EINVAL; 1073 /* Most drivers don't handle rss_context, check it's 0 as well */ 1074 if (rxfh.rss_context && !ops->get_rxfh_context) 1075 return -EOPNOTSUPP; 1076 1077 rxfh.indir_size = dev_indir_size; 1078 rxfh.key_size = dev_key_size; 1079 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1080 return -EFAULT; 1081 1082 if ((user_indir_size && (user_indir_size != dev_indir_size)) || 1083 (user_key_size && (user_key_size != dev_key_size))) 1084 return -EINVAL; 1085 1086 indir_bytes = user_indir_size * sizeof(indir[0]); 1087 total_size = indir_bytes + user_key_size; 1088 rss_config = kzalloc(total_size, GFP_USER); 1089 if (!rss_config) 1090 return -ENOMEM; 1091 1092 if (user_indir_size) 1093 indir = (u32 *)rss_config; 1094 1095 if (user_key_size) 1096 hkey = rss_config + indir_bytes; 1097 1098 if (rxfh.rss_context) 1099 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey, 1100 &dev_hfunc, 1101 rxfh.rss_context); 1102 else 1103 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc); 1104 if (ret) 1105 goto out; 1106 1107 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1108 &dev_hfunc, sizeof(rxfh.hfunc))) { 1109 ret = -EFAULT; 1110 } else if (copy_to_user(useraddr + 1111 offsetof(struct ethtool_rxfh, rss_config[0]), 1112 rss_config, total_size)) { 1113 ret = -EFAULT; 1114 } 1115 out: 1116 kfree(rss_config); 1117 1118 return ret; 1119 } 1120 1121 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1122 void __user *useraddr) 1123 { 1124 int ret; 1125 const struct ethtool_ops *ops = dev->ethtool_ops; 1126 struct ethtool_rxnfc rx_rings; 1127 struct ethtool_rxfh rxfh; 1128 u32 dev_indir_size = 0, dev_key_size = 0, i; 1129 u32 *indir = NULL, indir_bytes = 0; 1130 u8 *hkey = NULL; 1131 u8 *rss_config; 1132 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1133 bool delete = false; 1134 1135 if (!ops->get_rxnfc || !ops->set_rxfh) 1136 return -EOPNOTSUPP; 1137 1138 if (ops->get_rxfh_indir_size) 1139 dev_indir_size = ops->get_rxfh_indir_size(dev); 1140 if (ops->get_rxfh_key_size) 1141 dev_key_size = ops->get_rxfh_key_size(dev); 1142 1143 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1144 return -EFAULT; 1145 1146 /* Check that reserved fields are 0 for now */ 1147 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1148 return -EINVAL; 1149 /* Most drivers don't handle rss_context, check it's 0 as well */ 1150 if (rxfh.rss_context && !ops->set_rxfh_context) 1151 return -EOPNOTSUPP; 1152 1153 /* If either indir, hash key or function is valid, proceed further. 1154 * Must request at least one change: indir size, hash key or function. 1155 */ 1156 if ((rxfh.indir_size && 1157 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1158 rxfh.indir_size != dev_indir_size) || 1159 (rxfh.key_size && (rxfh.key_size != dev_key_size)) || 1160 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1161 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE)) 1162 return -EINVAL; 1163 1164 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1165 indir_bytes = dev_indir_size * sizeof(indir[0]); 1166 1167 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER); 1168 if (!rss_config) 1169 return -ENOMEM; 1170 1171 rx_rings.cmd = ETHTOOL_GRXRINGS; 1172 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1173 if (ret) 1174 goto out; 1175 1176 /* rxfh.indir_size == 0 means reset the indir table to default (master 1177 * context) or delete the context (other RSS contexts). 1178 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1179 */ 1180 if (rxfh.indir_size && 1181 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1182 indir = (u32 *)rss_config; 1183 ret = ethtool_copy_validate_indir(indir, 1184 useraddr + rss_cfg_offset, 1185 &rx_rings, 1186 rxfh.indir_size); 1187 if (ret) 1188 goto out; 1189 } else if (rxfh.indir_size == 0) { 1190 if (rxfh.rss_context == 0) { 1191 indir = (u32 *)rss_config; 1192 for (i = 0; i < dev_indir_size; i++) 1193 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1194 } else { 1195 delete = true; 1196 } 1197 } 1198 1199 if (rxfh.key_size) { 1200 hkey = rss_config + indir_bytes; 1201 if (copy_from_user(hkey, 1202 useraddr + rss_cfg_offset + indir_bytes, 1203 rxfh.key_size)) { 1204 ret = -EFAULT; 1205 goto out; 1206 } 1207 } 1208 1209 if (rxfh.rss_context) 1210 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc, 1211 &rxfh.rss_context, delete); 1212 else 1213 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc); 1214 if (ret) 1215 goto out; 1216 1217 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1218 &rxfh.rss_context, sizeof(rxfh.rss_context))) 1219 ret = -EFAULT; 1220 1221 if (!rxfh.rss_context) { 1222 /* indicate whether rxfh was set to default */ 1223 if (rxfh.indir_size == 0) 1224 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1225 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1226 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1227 } 1228 1229 out: 1230 kfree(rss_config); 1231 return ret; 1232 } 1233 1234 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1235 { 1236 struct ethtool_regs regs; 1237 const struct ethtool_ops *ops = dev->ethtool_ops; 1238 void *regbuf; 1239 int reglen, ret; 1240 1241 if (!ops->get_regs || !ops->get_regs_len) 1242 return -EOPNOTSUPP; 1243 1244 if (copy_from_user(®s, useraddr, sizeof(regs))) 1245 return -EFAULT; 1246 1247 reglen = ops->get_regs_len(dev); 1248 if (reglen <= 0) 1249 return reglen; 1250 1251 if (regs.len > reglen) 1252 regs.len = reglen; 1253 1254 regbuf = vzalloc(reglen); 1255 if (!regbuf) 1256 return -ENOMEM; 1257 1258 if (regs.len < reglen) 1259 reglen = regs.len; 1260 1261 ops->get_regs(dev, ®s, regbuf); 1262 1263 ret = -EFAULT; 1264 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1265 goto out; 1266 useraddr += offsetof(struct ethtool_regs, data); 1267 if (copy_to_user(useraddr, regbuf, reglen)) 1268 goto out; 1269 ret = 0; 1270 1271 out: 1272 vfree(regbuf); 1273 return ret; 1274 } 1275 1276 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1277 { 1278 struct ethtool_value reset; 1279 int ret; 1280 1281 if (!dev->ethtool_ops->reset) 1282 return -EOPNOTSUPP; 1283 1284 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1285 return -EFAULT; 1286 1287 ret = dev->ethtool_ops->reset(dev, &reset.data); 1288 if (ret) 1289 return ret; 1290 1291 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1292 return -EFAULT; 1293 return 0; 1294 } 1295 1296 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1297 { 1298 struct ethtool_wolinfo wol; 1299 1300 if (!dev->ethtool_ops->get_wol) 1301 return -EOPNOTSUPP; 1302 1303 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1304 wol.cmd = ETHTOOL_GWOL; 1305 dev->ethtool_ops->get_wol(dev, &wol); 1306 1307 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1308 return -EFAULT; 1309 return 0; 1310 } 1311 1312 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1313 { 1314 struct ethtool_wolinfo wol; 1315 int ret; 1316 1317 if (!dev->ethtool_ops->set_wol) 1318 return -EOPNOTSUPP; 1319 1320 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1321 return -EFAULT; 1322 1323 ret = dev->ethtool_ops->set_wol(dev, &wol); 1324 if (ret) 1325 return ret; 1326 1327 dev->wol_enabled = !!wol.wolopts; 1328 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 1329 1330 return 0; 1331 } 1332 1333 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1334 { 1335 struct ethtool_eee edata; 1336 int rc; 1337 1338 if (!dev->ethtool_ops->get_eee) 1339 return -EOPNOTSUPP; 1340 1341 memset(&edata, 0, sizeof(struct ethtool_eee)); 1342 edata.cmd = ETHTOOL_GEEE; 1343 rc = dev->ethtool_ops->get_eee(dev, &edata); 1344 1345 if (rc) 1346 return rc; 1347 1348 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1349 return -EFAULT; 1350 1351 return 0; 1352 } 1353 1354 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1355 { 1356 struct ethtool_eee edata; 1357 1358 if (!dev->ethtool_ops->set_eee) 1359 return -EOPNOTSUPP; 1360 1361 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1362 return -EFAULT; 1363 1364 return dev->ethtool_ops->set_eee(dev, &edata); 1365 } 1366 1367 static int ethtool_nway_reset(struct net_device *dev) 1368 { 1369 if (!dev->ethtool_ops->nway_reset) 1370 return -EOPNOTSUPP; 1371 1372 return dev->ethtool_ops->nway_reset(dev); 1373 } 1374 1375 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1376 { 1377 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1378 int link = __ethtool_get_link(dev); 1379 1380 if (link < 0) 1381 return link; 1382 1383 edata.data = link; 1384 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1385 return -EFAULT; 1386 return 0; 1387 } 1388 1389 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1390 int (*getter)(struct net_device *, 1391 struct ethtool_eeprom *, u8 *), 1392 u32 total_len) 1393 { 1394 struct ethtool_eeprom eeprom; 1395 void __user *userbuf = useraddr + sizeof(eeprom); 1396 u32 bytes_remaining; 1397 u8 *data; 1398 int ret = 0; 1399 1400 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1401 return -EFAULT; 1402 1403 /* Check for wrap and zero */ 1404 if (eeprom.offset + eeprom.len <= eeprom.offset) 1405 return -EINVAL; 1406 1407 /* Check for exceeding total eeprom len */ 1408 if (eeprom.offset + eeprom.len > total_len) 1409 return -EINVAL; 1410 1411 data = kmalloc(PAGE_SIZE, GFP_USER); 1412 if (!data) 1413 return -ENOMEM; 1414 1415 bytes_remaining = eeprom.len; 1416 while (bytes_remaining > 0) { 1417 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1418 1419 ret = getter(dev, &eeprom, data); 1420 if (ret) 1421 break; 1422 if (copy_to_user(userbuf, data, eeprom.len)) { 1423 ret = -EFAULT; 1424 break; 1425 } 1426 userbuf += eeprom.len; 1427 eeprom.offset += eeprom.len; 1428 bytes_remaining -= eeprom.len; 1429 } 1430 1431 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1432 eeprom.offset -= eeprom.len; 1433 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1434 ret = -EFAULT; 1435 1436 kfree(data); 1437 return ret; 1438 } 1439 1440 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1441 { 1442 const struct ethtool_ops *ops = dev->ethtool_ops; 1443 1444 if (!ops->get_eeprom || !ops->get_eeprom_len || 1445 !ops->get_eeprom_len(dev)) 1446 return -EOPNOTSUPP; 1447 1448 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1449 ops->get_eeprom_len(dev)); 1450 } 1451 1452 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1453 { 1454 struct ethtool_eeprom eeprom; 1455 const struct ethtool_ops *ops = dev->ethtool_ops; 1456 void __user *userbuf = useraddr + sizeof(eeprom); 1457 u32 bytes_remaining; 1458 u8 *data; 1459 int ret = 0; 1460 1461 if (!ops->set_eeprom || !ops->get_eeprom_len || 1462 !ops->get_eeprom_len(dev)) 1463 return -EOPNOTSUPP; 1464 1465 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1466 return -EFAULT; 1467 1468 /* Check for wrap and zero */ 1469 if (eeprom.offset + eeprom.len <= eeprom.offset) 1470 return -EINVAL; 1471 1472 /* Check for exceeding total eeprom len */ 1473 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1474 return -EINVAL; 1475 1476 data = kmalloc(PAGE_SIZE, GFP_USER); 1477 if (!data) 1478 return -ENOMEM; 1479 1480 bytes_remaining = eeprom.len; 1481 while (bytes_remaining > 0) { 1482 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1483 1484 if (copy_from_user(data, userbuf, eeprom.len)) { 1485 ret = -EFAULT; 1486 break; 1487 } 1488 ret = ops->set_eeprom(dev, &eeprom, data); 1489 if (ret) 1490 break; 1491 userbuf += eeprom.len; 1492 eeprom.offset += eeprom.len; 1493 bytes_remaining -= eeprom.len; 1494 } 1495 1496 kfree(data); 1497 return ret; 1498 } 1499 1500 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1501 void __user *useraddr) 1502 { 1503 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1504 1505 if (!dev->ethtool_ops->get_coalesce) 1506 return -EOPNOTSUPP; 1507 1508 dev->ethtool_ops->get_coalesce(dev, &coalesce); 1509 1510 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1511 return -EFAULT; 1512 return 0; 1513 } 1514 1515 static bool 1516 ethtool_set_coalesce_supported(struct net_device *dev, 1517 struct ethtool_coalesce *coalesce) 1518 { 1519 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1520 u32 nonzero_params = 0; 1521 1522 if (coalesce->rx_coalesce_usecs) 1523 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1524 if (coalesce->rx_max_coalesced_frames) 1525 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1526 if (coalesce->rx_coalesce_usecs_irq) 1527 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1528 if (coalesce->rx_max_coalesced_frames_irq) 1529 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1530 if (coalesce->tx_coalesce_usecs) 1531 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1532 if (coalesce->tx_max_coalesced_frames) 1533 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1534 if (coalesce->tx_coalesce_usecs_irq) 1535 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1536 if (coalesce->tx_max_coalesced_frames_irq) 1537 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1538 if (coalesce->stats_block_coalesce_usecs) 1539 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1540 if (coalesce->use_adaptive_rx_coalesce) 1541 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1542 if (coalesce->use_adaptive_tx_coalesce) 1543 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1544 if (coalesce->pkt_rate_low) 1545 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1546 if (coalesce->rx_coalesce_usecs_low) 1547 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1548 if (coalesce->rx_max_coalesced_frames_low) 1549 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1550 if (coalesce->tx_coalesce_usecs_low) 1551 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1552 if (coalesce->tx_max_coalesced_frames_low) 1553 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1554 if (coalesce->pkt_rate_high) 1555 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1556 if (coalesce->rx_coalesce_usecs_high) 1557 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1558 if (coalesce->rx_max_coalesced_frames_high) 1559 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1560 if (coalesce->tx_coalesce_usecs_high) 1561 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1562 if (coalesce->tx_max_coalesced_frames_high) 1563 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1564 if (coalesce->rate_sample_interval) 1565 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1566 1567 return (supported_params & nonzero_params) == nonzero_params; 1568 } 1569 1570 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1571 void __user *useraddr) 1572 { 1573 struct ethtool_coalesce coalesce; 1574 1575 if (!dev->ethtool_ops->set_coalesce) 1576 return -EOPNOTSUPP; 1577 1578 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1579 return -EFAULT; 1580 1581 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 1582 return -EOPNOTSUPP; 1583 1584 return dev->ethtool_ops->set_coalesce(dev, &coalesce); 1585 } 1586 1587 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1588 { 1589 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1590 1591 if (!dev->ethtool_ops->get_ringparam) 1592 return -EOPNOTSUPP; 1593 1594 dev->ethtool_ops->get_ringparam(dev, &ringparam); 1595 1596 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1597 return -EFAULT; 1598 return 0; 1599 } 1600 1601 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1602 { 1603 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 1604 int ret; 1605 1606 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 1607 return -EOPNOTSUPP; 1608 1609 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1610 return -EFAULT; 1611 1612 dev->ethtool_ops->get_ringparam(dev, &max); 1613 1614 /* ensure new ring parameters are within the maximums */ 1615 if (ringparam.rx_pending > max.rx_max_pending || 1616 ringparam.rx_mini_pending > max.rx_mini_max_pending || 1617 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 1618 ringparam.tx_pending > max.tx_max_pending) 1619 return -EINVAL; 1620 1621 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam); 1622 if (!ret) 1623 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 1624 return ret; 1625 } 1626 1627 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1628 void __user *useraddr) 1629 { 1630 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1631 1632 if (!dev->ethtool_ops->get_channels) 1633 return -EOPNOTSUPP; 1634 1635 dev->ethtool_ops->get_channels(dev, &channels); 1636 1637 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1638 return -EFAULT; 1639 return 0; 1640 } 1641 1642 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1643 void __user *useraddr) 1644 { 1645 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 1646 u16 from_channel, to_channel; 1647 u32 max_rx_in_use = 0; 1648 unsigned int i; 1649 int ret; 1650 1651 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 1652 return -EOPNOTSUPP; 1653 1654 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1655 return -EFAULT; 1656 1657 dev->ethtool_ops->get_channels(dev, &curr); 1658 1659 /* ensure new counts are within the maximums */ 1660 if (channels.rx_count > curr.max_rx || 1661 channels.tx_count > curr.max_tx || 1662 channels.combined_count > curr.max_combined || 1663 channels.other_count > curr.max_other) 1664 return -EINVAL; 1665 1666 /* ensure the new Rx count fits within the configured Rx flow 1667 * indirection table settings */ 1668 if (netif_is_rxfh_configured(dev) && 1669 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) && 1670 (channels.combined_count + channels.rx_count) <= max_rx_in_use) 1671 return -EINVAL; 1672 1673 /* Disabling channels, query zero-copy AF_XDP sockets */ 1674 from_channel = channels.combined_count + 1675 min(channels.rx_count, channels.tx_count); 1676 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 1677 for (i = from_channel; i < to_channel; i++) 1678 if (xdp_get_umem_from_qid(dev, i)) 1679 return -EINVAL; 1680 1681 ret = dev->ethtool_ops->set_channels(dev, &channels); 1682 if (!ret) 1683 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 1684 return ret; 1685 } 1686 1687 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1688 { 1689 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 1690 1691 if (!dev->ethtool_ops->get_pauseparam) 1692 return -EOPNOTSUPP; 1693 1694 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1695 1696 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1697 return -EFAULT; 1698 return 0; 1699 } 1700 1701 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1702 { 1703 struct ethtool_pauseparam pauseparam; 1704 1705 if (!dev->ethtool_ops->set_pauseparam) 1706 return -EOPNOTSUPP; 1707 1708 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1709 return -EFAULT; 1710 1711 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1712 } 1713 1714 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1715 { 1716 struct ethtool_test test; 1717 const struct ethtool_ops *ops = dev->ethtool_ops; 1718 u64 *data; 1719 int ret, test_len; 1720 1721 if (!ops->self_test || !ops->get_sset_count) 1722 return -EOPNOTSUPP; 1723 1724 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1725 if (test_len < 0) 1726 return test_len; 1727 WARN_ON(test_len == 0); 1728 1729 if (copy_from_user(&test, useraddr, sizeof(test))) 1730 return -EFAULT; 1731 1732 test.len = test_len; 1733 data = kmalloc_array(test_len, sizeof(u64), GFP_USER); 1734 if (!data) 1735 return -ENOMEM; 1736 1737 ops->self_test(dev, &test, data); 1738 1739 ret = -EFAULT; 1740 if (copy_to_user(useraddr, &test, sizeof(test))) 1741 goto out; 1742 useraddr += sizeof(test); 1743 if (copy_to_user(useraddr, data, test.len * sizeof(u64))) 1744 goto out; 1745 ret = 0; 1746 1747 out: 1748 kfree(data); 1749 return ret; 1750 } 1751 1752 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1753 { 1754 struct ethtool_gstrings gstrings; 1755 u8 *data; 1756 int ret; 1757 1758 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1759 return -EFAULT; 1760 1761 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1762 if (ret < 0) 1763 return ret; 1764 if (ret > S32_MAX / ETH_GSTRING_LEN) 1765 return -ENOMEM; 1766 WARN_ON_ONCE(!ret); 1767 1768 gstrings.len = ret; 1769 1770 if (gstrings.len) { 1771 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 1772 if (!data) 1773 return -ENOMEM; 1774 1775 __ethtool_get_strings(dev, gstrings.string_set, data); 1776 } else { 1777 data = NULL; 1778 } 1779 1780 ret = -EFAULT; 1781 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1782 goto out; 1783 useraddr += sizeof(gstrings); 1784 if (gstrings.len && 1785 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) 1786 goto out; 1787 ret = 0; 1788 1789 out: 1790 vfree(data); 1791 return ret; 1792 } 1793 1794 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 1795 { 1796 struct ethtool_value id; 1797 static bool busy; 1798 const struct ethtool_ops *ops = dev->ethtool_ops; 1799 int rc; 1800 1801 if (!ops->set_phys_id) 1802 return -EOPNOTSUPP; 1803 1804 if (busy) 1805 return -EBUSY; 1806 1807 if (copy_from_user(&id, useraddr, sizeof(id))) 1808 return -EFAULT; 1809 1810 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 1811 if (rc < 0) 1812 return rc; 1813 1814 /* Drop the RTNL lock while waiting, but prevent reentry or 1815 * removal of the device. 1816 */ 1817 busy = true; 1818 dev_hold(dev); 1819 rtnl_unlock(); 1820 1821 if (rc == 0) { 1822 /* Driver will handle this itself */ 1823 schedule_timeout_interruptible( 1824 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 1825 } else { 1826 /* Driver expects to be called at twice the frequency in rc */ 1827 int n = rc * 2, i, interval = HZ / n; 1828 1829 /* Count down seconds */ 1830 do { 1831 /* Count down iterations per second */ 1832 i = n; 1833 do { 1834 rtnl_lock(); 1835 rc = ops->set_phys_id(dev, 1836 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 1837 rtnl_unlock(); 1838 if (rc) 1839 break; 1840 schedule_timeout_interruptible(interval); 1841 } while (!signal_pending(current) && --i != 0); 1842 } while (!signal_pending(current) && 1843 (id.data == 0 || --id.data != 0)); 1844 } 1845 1846 rtnl_lock(); 1847 dev_put(dev); 1848 busy = false; 1849 1850 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 1851 return rc; 1852 } 1853 1854 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 1855 { 1856 struct ethtool_stats stats; 1857 const struct ethtool_ops *ops = dev->ethtool_ops; 1858 u64 *data; 1859 int ret, n_stats; 1860 1861 if (!ops->get_ethtool_stats || !ops->get_sset_count) 1862 return -EOPNOTSUPP; 1863 1864 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 1865 if (n_stats < 0) 1866 return n_stats; 1867 if (n_stats > S32_MAX / sizeof(u64)) 1868 return -ENOMEM; 1869 WARN_ON_ONCE(!n_stats); 1870 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1871 return -EFAULT; 1872 1873 stats.n_stats = n_stats; 1874 1875 if (n_stats) { 1876 data = vzalloc(array_size(n_stats, sizeof(u64))); 1877 if (!data) 1878 return -ENOMEM; 1879 ops->get_ethtool_stats(dev, &stats, data); 1880 } else { 1881 data = NULL; 1882 } 1883 1884 ret = -EFAULT; 1885 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1886 goto out; 1887 useraddr += sizeof(stats); 1888 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1889 goto out; 1890 ret = 0; 1891 1892 out: 1893 vfree(data); 1894 return ret; 1895 } 1896 1897 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 1898 { 1899 const struct ethtool_ops *ops = dev->ethtool_ops; 1900 struct phy_device *phydev = dev->phydev; 1901 struct ethtool_stats stats; 1902 u64 *data; 1903 int ret, n_stats; 1904 1905 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count)) 1906 return -EOPNOTSUPP; 1907 1908 if (dev->phydev && !ops->get_ethtool_phy_stats) 1909 n_stats = phy_ethtool_get_sset_count(dev->phydev); 1910 else 1911 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 1912 if (n_stats < 0) 1913 return n_stats; 1914 if (n_stats > S32_MAX / sizeof(u64)) 1915 return -ENOMEM; 1916 WARN_ON_ONCE(!n_stats); 1917 1918 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1919 return -EFAULT; 1920 1921 stats.n_stats = n_stats; 1922 1923 if (n_stats) { 1924 data = vzalloc(array_size(n_stats, sizeof(u64))); 1925 if (!data) 1926 return -ENOMEM; 1927 1928 if (dev->phydev && !ops->get_ethtool_phy_stats) { 1929 ret = phy_ethtool_get_stats(dev->phydev, &stats, data); 1930 if (ret < 0) 1931 goto out; 1932 } else { 1933 ops->get_ethtool_phy_stats(dev, &stats, data); 1934 } 1935 } else { 1936 data = NULL; 1937 } 1938 1939 ret = -EFAULT; 1940 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1941 goto out; 1942 useraddr += sizeof(stats); 1943 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1944 goto out; 1945 ret = 0; 1946 1947 out: 1948 vfree(data); 1949 return ret; 1950 } 1951 1952 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 1953 { 1954 struct ethtool_perm_addr epaddr; 1955 1956 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 1957 return -EFAULT; 1958 1959 if (epaddr.size < dev->addr_len) 1960 return -ETOOSMALL; 1961 epaddr.size = dev->addr_len; 1962 1963 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 1964 return -EFAULT; 1965 useraddr += sizeof(epaddr); 1966 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 1967 return -EFAULT; 1968 return 0; 1969 } 1970 1971 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 1972 u32 cmd, u32 (*actor)(struct net_device *)) 1973 { 1974 struct ethtool_value edata = { .cmd = cmd }; 1975 1976 if (!actor) 1977 return -EOPNOTSUPP; 1978 1979 edata.data = actor(dev); 1980 1981 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1982 return -EFAULT; 1983 return 0; 1984 } 1985 1986 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 1987 void (*actor)(struct net_device *, u32)) 1988 { 1989 struct ethtool_value edata; 1990 1991 if (!actor) 1992 return -EOPNOTSUPP; 1993 1994 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1995 return -EFAULT; 1996 1997 actor(dev, edata.data); 1998 return 0; 1999 } 2000 2001 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2002 int (*actor)(struct net_device *, u32)) 2003 { 2004 struct ethtool_value edata; 2005 2006 if (!actor) 2007 return -EOPNOTSUPP; 2008 2009 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2010 return -EFAULT; 2011 2012 return actor(dev, edata.data); 2013 } 2014 2015 static noinline_for_stack int ethtool_flash_device(struct net_device *dev, 2016 char __user *useraddr) 2017 { 2018 struct ethtool_flash efl; 2019 2020 if (copy_from_user(&efl, useraddr, sizeof(efl))) 2021 return -EFAULT; 2022 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 2023 2024 if (!dev->ethtool_ops->flash_device) 2025 return devlink_compat_flash_update(dev, efl.data); 2026 2027 return dev->ethtool_ops->flash_device(dev, &efl); 2028 } 2029 2030 static int ethtool_set_dump(struct net_device *dev, 2031 void __user *useraddr) 2032 { 2033 struct ethtool_dump dump; 2034 2035 if (!dev->ethtool_ops->set_dump) 2036 return -EOPNOTSUPP; 2037 2038 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2039 return -EFAULT; 2040 2041 return dev->ethtool_ops->set_dump(dev, &dump); 2042 } 2043 2044 static int ethtool_get_dump_flag(struct net_device *dev, 2045 void __user *useraddr) 2046 { 2047 int ret; 2048 struct ethtool_dump dump; 2049 const struct ethtool_ops *ops = dev->ethtool_ops; 2050 2051 if (!ops->get_dump_flag) 2052 return -EOPNOTSUPP; 2053 2054 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2055 return -EFAULT; 2056 2057 ret = ops->get_dump_flag(dev, &dump); 2058 if (ret) 2059 return ret; 2060 2061 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2062 return -EFAULT; 2063 return 0; 2064 } 2065 2066 static int ethtool_get_dump_data(struct net_device *dev, 2067 void __user *useraddr) 2068 { 2069 int ret; 2070 __u32 len; 2071 struct ethtool_dump dump, tmp; 2072 const struct ethtool_ops *ops = dev->ethtool_ops; 2073 void *data = NULL; 2074 2075 if (!ops->get_dump_data || !ops->get_dump_flag) 2076 return -EOPNOTSUPP; 2077 2078 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2079 return -EFAULT; 2080 2081 memset(&tmp, 0, sizeof(tmp)); 2082 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2083 ret = ops->get_dump_flag(dev, &tmp); 2084 if (ret) 2085 return ret; 2086 2087 len = min(tmp.len, dump.len); 2088 if (!len) 2089 return -EFAULT; 2090 2091 /* Don't ever let the driver think there's more space available 2092 * than it requested with .get_dump_flag(). 2093 */ 2094 dump.len = len; 2095 2096 /* Always allocate enough space to hold the whole thing so that the 2097 * driver does not need to check the length and bother with partial 2098 * dumping. 2099 */ 2100 data = vzalloc(tmp.len); 2101 if (!data) 2102 return -ENOMEM; 2103 ret = ops->get_dump_data(dev, &dump, data); 2104 if (ret) 2105 goto out; 2106 2107 /* There are two sane possibilities: 2108 * 1. The driver's .get_dump_data() does not touch dump.len. 2109 * 2. Or it may set dump.len to how much it really writes, which 2110 * should be tmp.len (or len if it can do a partial dump). 2111 * In any case respond to userspace with the actual length of data 2112 * it's receiving. 2113 */ 2114 WARN_ON(dump.len != len && dump.len != tmp.len); 2115 dump.len = len; 2116 2117 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2118 ret = -EFAULT; 2119 goto out; 2120 } 2121 useraddr += offsetof(struct ethtool_dump, data); 2122 if (copy_to_user(useraddr, data, len)) 2123 ret = -EFAULT; 2124 out: 2125 vfree(data); 2126 return ret; 2127 } 2128 2129 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2130 { 2131 int err = 0; 2132 struct ethtool_ts_info info; 2133 const struct ethtool_ops *ops = dev->ethtool_ops; 2134 struct phy_device *phydev = dev->phydev; 2135 2136 memset(&info, 0, sizeof(info)); 2137 info.cmd = ETHTOOL_GET_TS_INFO; 2138 2139 if (phy_has_tsinfo(phydev)) { 2140 err = phy_ts_info(phydev, &info); 2141 } else if (ops->get_ts_info) { 2142 err = ops->get_ts_info(dev, &info); 2143 } else { 2144 info.so_timestamping = 2145 SOF_TIMESTAMPING_RX_SOFTWARE | 2146 SOF_TIMESTAMPING_SOFTWARE; 2147 info.phc_index = -1; 2148 } 2149 2150 if (err) 2151 return err; 2152 2153 if (copy_to_user(useraddr, &info, sizeof(info))) 2154 err = -EFAULT; 2155 2156 return err; 2157 } 2158 2159 static int __ethtool_get_module_info(struct net_device *dev, 2160 struct ethtool_modinfo *modinfo) 2161 { 2162 const struct ethtool_ops *ops = dev->ethtool_ops; 2163 struct phy_device *phydev = dev->phydev; 2164 2165 if (dev->sfp_bus) 2166 return sfp_get_module_info(dev->sfp_bus, modinfo); 2167 2168 if (phydev && phydev->drv && phydev->drv->module_info) 2169 return phydev->drv->module_info(phydev, modinfo); 2170 2171 if (ops->get_module_info) 2172 return ops->get_module_info(dev, modinfo); 2173 2174 return -EOPNOTSUPP; 2175 } 2176 2177 static int ethtool_get_module_info(struct net_device *dev, 2178 void __user *useraddr) 2179 { 2180 int ret; 2181 struct ethtool_modinfo modinfo; 2182 2183 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2184 return -EFAULT; 2185 2186 ret = __ethtool_get_module_info(dev, &modinfo); 2187 if (ret) 2188 return ret; 2189 2190 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2191 return -EFAULT; 2192 2193 return 0; 2194 } 2195 2196 static int __ethtool_get_module_eeprom(struct net_device *dev, 2197 struct ethtool_eeprom *ee, u8 *data) 2198 { 2199 const struct ethtool_ops *ops = dev->ethtool_ops; 2200 struct phy_device *phydev = dev->phydev; 2201 2202 if (dev->sfp_bus) 2203 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2204 2205 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2206 return phydev->drv->module_eeprom(phydev, ee, data); 2207 2208 if (ops->get_module_eeprom) 2209 return ops->get_module_eeprom(dev, ee, data); 2210 2211 return -EOPNOTSUPP; 2212 } 2213 2214 static int ethtool_get_module_eeprom(struct net_device *dev, 2215 void __user *useraddr) 2216 { 2217 int ret; 2218 struct ethtool_modinfo modinfo; 2219 2220 ret = __ethtool_get_module_info(dev, &modinfo); 2221 if (ret) 2222 return ret; 2223 2224 return ethtool_get_any_eeprom(dev, useraddr, 2225 __ethtool_get_module_eeprom, 2226 modinfo.eeprom_len); 2227 } 2228 2229 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2230 { 2231 switch (tuna->id) { 2232 case ETHTOOL_RX_COPYBREAK: 2233 case ETHTOOL_TX_COPYBREAK: 2234 if (tuna->len != sizeof(u32) || 2235 tuna->type_id != ETHTOOL_TUNABLE_U32) 2236 return -EINVAL; 2237 break; 2238 case ETHTOOL_PFC_PREVENTION_TOUT: 2239 if (tuna->len != sizeof(u16) || 2240 tuna->type_id != ETHTOOL_TUNABLE_U16) 2241 return -EINVAL; 2242 break; 2243 default: 2244 return -EINVAL; 2245 } 2246 2247 return 0; 2248 } 2249 2250 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2251 { 2252 int ret; 2253 struct ethtool_tunable tuna; 2254 const struct ethtool_ops *ops = dev->ethtool_ops; 2255 void *data; 2256 2257 if (!ops->get_tunable) 2258 return -EOPNOTSUPP; 2259 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2260 return -EFAULT; 2261 ret = ethtool_tunable_valid(&tuna); 2262 if (ret) 2263 return ret; 2264 data = kmalloc(tuna.len, GFP_USER); 2265 if (!data) 2266 return -ENOMEM; 2267 ret = ops->get_tunable(dev, &tuna, data); 2268 if (ret) 2269 goto out; 2270 useraddr += sizeof(tuna); 2271 ret = -EFAULT; 2272 if (copy_to_user(useraddr, data, tuna.len)) 2273 goto out; 2274 ret = 0; 2275 2276 out: 2277 kfree(data); 2278 return ret; 2279 } 2280 2281 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2282 { 2283 int ret; 2284 struct ethtool_tunable tuna; 2285 const struct ethtool_ops *ops = dev->ethtool_ops; 2286 void *data; 2287 2288 if (!ops->set_tunable) 2289 return -EOPNOTSUPP; 2290 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2291 return -EFAULT; 2292 ret = ethtool_tunable_valid(&tuna); 2293 if (ret) 2294 return ret; 2295 useraddr += sizeof(tuna); 2296 data = memdup_user(useraddr, tuna.len); 2297 if (IS_ERR(data)) 2298 return PTR_ERR(data); 2299 ret = ops->set_tunable(dev, &tuna, data); 2300 2301 kfree(data); 2302 return ret; 2303 } 2304 2305 static noinline_for_stack int 2306 ethtool_get_per_queue_coalesce(struct net_device *dev, 2307 void __user *useraddr, 2308 struct ethtool_per_queue_op *per_queue_opt) 2309 { 2310 u32 bit; 2311 int ret; 2312 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2313 2314 if (!dev->ethtool_ops->get_per_queue_coalesce) 2315 return -EOPNOTSUPP; 2316 2317 useraddr += sizeof(*per_queue_opt); 2318 2319 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2320 MAX_NUM_QUEUE); 2321 2322 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2323 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2324 2325 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2326 if (ret != 0) 2327 return ret; 2328 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2329 return -EFAULT; 2330 useraddr += sizeof(coalesce); 2331 } 2332 2333 return 0; 2334 } 2335 2336 static noinline_for_stack int 2337 ethtool_set_per_queue_coalesce(struct net_device *dev, 2338 void __user *useraddr, 2339 struct ethtool_per_queue_op *per_queue_opt) 2340 { 2341 u32 bit; 2342 int i, ret = 0; 2343 int n_queue; 2344 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2345 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2346 2347 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2348 (!dev->ethtool_ops->get_per_queue_coalesce)) 2349 return -EOPNOTSUPP; 2350 2351 useraddr += sizeof(*per_queue_opt); 2352 2353 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2354 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2355 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2356 if (!backup) 2357 return -ENOMEM; 2358 2359 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2360 struct ethtool_coalesce coalesce; 2361 2362 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2363 if (ret != 0) 2364 goto roll_back; 2365 2366 tmp++; 2367 2368 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2369 ret = -EFAULT; 2370 goto roll_back; 2371 } 2372 2373 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2374 ret = -EOPNOTSUPP; 2375 goto roll_back; 2376 } 2377 2378 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2379 if (ret != 0) 2380 goto roll_back; 2381 2382 useraddr += sizeof(coalesce); 2383 } 2384 2385 roll_back: 2386 if (ret != 0) { 2387 tmp = backup; 2388 for_each_set_bit(i, queue_mask, bit) { 2389 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2390 tmp++; 2391 } 2392 } 2393 kfree(backup); 2394 2395 return ret; 2396 } 2397 2398 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2399 void __user *useraddr, u32 sub_cmd) 2400 { 2401 struct ethtool_per_queue_op per_queue_opt; 2402 2403 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2404 return -EFAULT; 2405 2406 if (per_queue_opt.sub_command != sub_cmd) 2407 return -EINVAL; 2408 2409 switch (per_queue_opt.sub_command) { 2410 case ETHTOOL_GCOALESCE: 2411 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2412 case ETHTOOL_SCOALESCE: 2413 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2414 default: 2415 return -EOPNOTSUPP; 2416 }; 2417 } 2418 2419 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2420 { 2421 switch (tuna->id) { 2422 case ETHTOOL_PHY_DOWNSHIFT: 2423 case ETHTOOL_PHY_FAST_LINK_DOWN: 2424 if (tuna->len != sizeof(u8) || 2425 tuna->type_id != ETHTOOL_TUNABLE_U8) 2426 return -EINVAL; 2427 break; 2428 case ETHTOOL_PHY_EDPD: 2429 if (tuna->len != sizeof(u16) || 2430 tuna->type_id != ETHTOOL_TUNABLE_U16) 2431 return -EINVAL; 2432 break; 2433 default: 2434 return -EINVAL; 2435 } 2436 2437 return 0; 2438 } 2439 2440 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2441 { 2442 int ret; 2443 struct ethtool_tunable tuna; 2444 struct phy_device *phydev = dev->phydev; 2445 void *data; 2446 2447 if (!(phydev && phydev->drv && phydev->drv->get_tunable)) 2448 return -EOPNOTSUPP; 2449 2450 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2451 return -EFAULT; 2452 ret = ethtool_phy_tunable_valid(&tuna); 2453 if (ret) 2454 return ret; 2455 data = kmalloc(tuna.len, GFP_USER); 2456 if (!data) 2457 return -ENOMEM; 2458 mutex_lock(&phydev->lock); 2459 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2460 mutex_unlock(&phydev->lock); 2461 if (ret) 2462 goto out; 2463 useraddr += sizeof(tuna); 2464 ret = -EFAULT; 2465 if (copy_to_user(useraddr, data, tuna.len)) 2466 goto out; 2467 ret = 0; 2468 2469 out: 2470 kfree(data); 2471 return ret; 2472 } 2473 2474 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2475 { 2476 int ret; 2477 struct ethtool_tunable tuna; 2478 struct phy_device *phydev = dev->phydev; 2479 void *data; 2480 2481 if (!(phydev && phydev->drv && phydev->drv->set_tunable)) 2482 return -EOPNOTSUPP; 2483 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2484 return -EFAULT; 2485 ret = ethtool_phy_tunable_valid(&tuna); 2486 if (ret) 2487 return ret; 2488 useraddr += sizeof(tuna); 2489 data = memdup_user(useraddr, tuna.len); 2490 if (IS_ERR(data)) 2491 return PTR_ERR(data); 2492 mutex_lock(&phydev->lock); 2493 ret = phydev->drv->set_tunable(phydev, &tuna, data); 2494 mutex_unlock(&phydev->lock); 2495 2496 kfree(data); 2497 return ret; 2498 } 2499 2500 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 2501 { 2502 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 2503 int rc; 2504 2505 if (!dev->ethtool_ops->get_fecparam) 2506 return -EOPNOTSUPP; 2507 2508 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 2509 if (rc) 2510 return rc; 2511 2512 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 2513 return -EFAULT; 2514 return 0; 2515 } 2516 2517 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 2518 { 2519 struct ethtool_fecparam fecparam; 2520 2521 if (!dev->ethtool_ops->set_fecparam) 2522 return -EOPNOTSUPP; 2523 2524 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 2525 return -EFAULT; 2526 2527 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 2528 } 2529 2530 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 2531 2532 int dev_ethtool(struct net *net, struct ifreq *ifr) 2533 { 2534 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 2535 void __user *useraddr = ifr->ifr_data; 2536 u32 ethcmd, sub_cmd; 2537 int rc; 2538 netdev_features_t old_features; 2539 2540 if (!dev || !netif_device_present(dev)) 2541 return -ENODEV; 2542 2543 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 2544 return -EFAULT; 2545 2546 if (ethcmd == ETHTOOL_PERQUEUE) { 2547 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 2548 return -EFAULT; 2549 } else { 2550 sub_cmd = ethcmd; 2551 } 2552 /* Allow some commands to be done by anyone */ 2553 switch (sub_cmd) { 2554 case ETHTOOL_GSET: 2555 case ETHTOOL_GDRVINFO: 2556 case ETHTOOL_GMSGLVL: 2557 case ETHTOOL_GLINK: 2558 case ETHTOOL_GCOALESCE: 2559 case ETHTOOL_GRINGPARAM: 2560 case ETHTOOL_GPAUSEPARAM: 2561 case ETHTOOL_GRXCSUM: 2562 case ETHTOOL_GTXCSUM: 2563 case ETHTOOL_GSG: 2564 case ETHTOOL_GSSET_INFO: 2565 case ETHTOOL_GSTRINGS: 2566 case ETHTOOL_GSTATS: 2567 case ETHTOOL_GPHYSTATS: 2568 case ETHTOOL_GTSO: 2569 case ETHTOOL_GPERMADDR: 2570 case ETHTOOL_GUFO: 2571 case ETHTOOL_GGSO: 2572 case ETHTOOL_GGRO: 2573 case ETHTOOL_GFLAGS: 2574 case ETHTOOL_GPFLAGS: 2575 case ETHTOOL_GRXFH: 2576 case ETHTOOL_GRXRINGS: 2577 case ETHTOOL_GRXCLSRLCNT: 2578 case ETHTOOL_GRXCLSRULE: 2579 case ETHTOOL_GRXCLSRLALL: 2580 case ETHTOOL_GRXFHINDIR: 2581 case ETHTOOL_GRSSH: 2582 case ETHTOOL_GFEATURES: 2583 case ETHTOOL_GCHANNELS: 2584 case ETHTOOL_GET_TS_INFO: 2585 case ETHTOOL_GEEE: 2586 case ETHTOOL_GTUNABLE: 2587 case ETHTOOL_PHY_GTUNABLE: 2588 case ETHTOOL_GLINKSETTINGS: 2589 case ETHTOOL_GFECPARAM: 2590 break; 2591 default: 2592 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2593 return -EPERM; 2594 } 2595 2596 if (dev->ethtool_ops->begin) { 2597 rc = dev->ethtool_ops->begin(dev); 2598 if (rc < 0) 2599 return rc; 2600 } 2601 old_features = dev->features; 2602 2603 switch (ethcmd) { 2604 case ETHTOOL_GSET: 2605 rc = ethtool_get_settings(dev, useraddr); 2606 break; 2607 case ETHTOOL_SSET: 2608 rc = ethtool_set_settings(dev, useraddr); 2609 break; 2610 case ETHTOOL_GDRVINFO: 2611 rc = ethtool_get_drvinfo(dev, useraddr); 2612 break; 2613 case ETHTOOL_GREGS: 2614 rc = ethtool_get_regs(dev, useraddr); 2615 break; 2616 case ETHTOOL_GWOL: 2617 rc = ethtool_get_wol(dev, useraddr); 2618 break; 2619 case ETHTOOL_SWOL: 2620 rc = ethtool_set_wol(dev, useraddr); 2621 break; 2622 case ETHTOOL_GMSGLVL: 2623 rc = ethtool_get_value(dev, useraddr, ethcmd, 2624 dev->ethtool_ops->get_msglevel); 2625 break; 2626 case ETHTOOL_SMSGLVL: 2627 rc = ethtool_set_value_void(dev, useraddr, 2628 dev->ethtool_ops->set_msglevel); 2629 if (!rc) 2630 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 2631 break; 2632 case ETHTOOL_GEEE: 2633 rc = ethtool_get_eee(dev, useraddr); 2634 break; 2635 case ETHTOOL_SEEE: 2636 rc = ethtool_set_eee(dev, useraddr); 2637 break; 2638 case ETHTOOL_NWAY_RST: 2639 rc = ethtool_nway_reset(dev); 2640 break; 2641 case ETHTOOL_GLINK: 2642 rc = ethtool_get_link(dev, useraddr); 2643 break; 2644 case ETHTOOL_GEEPROM: 2645 rc = ethtool_get_eeprom(dev, useraddr); 2646 break; 2647 case ETHTOOL_SEEPROM: 2648 rc = ethtool_set_eeprom(dev, useraddr); 2649 break; 2650 case ETHTOOL_GCOALESCE: 2651 rc = ethtool_get_coalesce(dev, useraddr); 2652 break; 2653 case ETHTOOL_SCOALESCE: 2654 rc = ethtool_set_coalesce(dev, useraddr); 2655 break; 2656 case ETHTOOL_GRINGPARAM: 2657 rc = ethtool_get_ringparam(dev, useraddr); 2658 break; 2659 case ETHTOOL_SRINGPARAM: 2660 rc = ethtool_set_ringparam(dev, useraddr); 2661 break; 2662 case ETHTOOL_GPAUSEPARAM: 2663 rc = ethtool_get_pauseparam(dev, useraddr); 2664 break; 2665 case ETHTOOL_SPAUSEPARAM: 2666 rc = ethtool_set_pauseparam(dev, useraddr); 2667 break; 2668 case ETHTOOL_TEST: 2669 rc = ethtool_self_test(dev, useraddr); 2670 break; 2671 case ETHTOOL_GSTRINGS: 2672 rc = ethtool_get_strings(dev, useraddr); 2673 break; 2674 case ETHTOOL_PHYS_ID: 2675 rc = ethtool_phys_id(dev, useraddr); 2676 break; 2677 case ETHTOOL_GSTATS: 2678 rc = ethtool_get_stats(dev, useraddr); 2679 break; 2680 case ETHTOOL_GPERMADDR: 2681 rc = ethtool_get_perm_addr(dev, useraddr); 2682 break; 2683 case ETHTOOL_GFLAGS: 2684 rc = ethtool_get_value(dev, useraddr, ethcmd, 2685 __ethtool_get_flags); 2686 break; 2687 case ETHTOOL_SFLAGS: 2688 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 2689 break; 2690 case ETHTOOL_GPFLAGS: 2691 rc = ethtool_get_value(dev, useraddr, ethcmd, 2692 dev->ethtool_ops->get_priv_flags); 2693 if (!rc) 2694 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 2695 break; 2696 case ETHTOOL_SPFLAGS: 2697 rc = ethtool_set_value(dev, useraddr, 2698 dev->ethtool_ops->set_priv_flags); 2699 break; 2700 case ETHTOOL_GRXFH: 2701 case ETHTOOL_GRXRINGS: 2702 case ETHTOOL_GRXCLSRLCNT: 2703 case ETHTOOL_GRXCLSRULE: 2704 case ETHTOOL_GRXCLSRLALL: 2705 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 2706 break; 2707 case ETHTOOL_SRXFH: 2708 case ETHTOOL_SRXCLSRLDEL: 2709 case ETHTOOL_SRXCLSRLINS: 2710 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 2711 break; 2712 case ETHTOOL_FLASHDEV: 2713 rc = ethtool_flash_device(dev, useraddr); 2714 break; 2715 case ETHTOOL_RESET: 2716 rc = ethtool_reset(dev, useraddr); 2717 break; 2718 case ETHTOOL_GSSET_INFO: 2719 rc = ethtool_get_sset_info(dev, useraddr); 2720 break; 2721 case ETHTOOL_GRXFHINDIR: 2722 rc = ethtool_get_rxfh_indir(dev, useraddr); 2723 break; 2724 case ETHTOOL_SRXFHINDIR: 2725 rc = ethtool_set_rxfh_indir(dev, useraddr); 2726 break; 2727 case ETHTOOL_GRSSH: 2728 rc = ethtool_get_rxfh(dev, useraddr); 2729 break; 2730 case ETHTOOL_SRSSH: 2731 rc = ethtool_set_rxfh(dev, useraddr); 2732 break; 2733 case ETHTOOL_GFEATURES: 2734 rc = ethtool_get_features(dev, useraddr); 2735 break; 2736 case ETHTOOL_SFEATURES: 2737 rc = ethtool_set_features(dev, useraddr); 2738 break; 2739 case ETHTOOL_GTXCSUM: 2740 case ETHTOOL_GRXCSUM: 2741 case ETHTOOL_GSG: 2742 case ETHTOOL_GTSO: 2743 case ETHTOOL_GGSO: 2744 case ETHTOOL_GGRO: 2745 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 2746 break; 2747 case ETHTOOL_STXCSUM: 2748 case ETHTOOL_SRXCSUM: 2749 case ETHTOOL_SSG: 2750 case ETHTOOL_STSO: 2751 case ETHTOOL_SGSO: 2752 case ETHTOOL_SGRO: 2753 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 2754 break; 2755 case ETHTOOL_GCHANNELS: 2756 rc = ethtool_get_channels(dev, useraddr); 2757 break; 2758 case ETHTOOL_SCHANNELS: 2759 rc = ethtool_set_channels(dev, useraddr); 2760 break; 2761 case ETHTOOL_SET_DUMP: 2762 rc = ethtool_set_dump(dev, useraddr); 2763 break; 2764 case ETHTOOL_GET_DUMP_FLAG: 2765 rc = ethtool_get_dump_flag(dev, useraddr); 2766 break; 2767 case ETHTOOL_GET_DUMP_DATA: 2768 rc = ethtool_get_dump_data(dev, useraddr); 2769 break; 2770 case ETHTOOL_GET_TS_INFO: 2771 rc = ethtool_get_ts_info(dev, useraddr); 2772 break; 2773 case ETHTOOL_GMODULEINFO: 2774 rc = ethtool_get_module_info(dev, useraddr); 2775 break; 2776 case ETHTOOL_GMODULEEEPROM: 2777 rc = ethtool_get_module_eeprom(dev, useraddr); 2778 break; 2779 case ETHTOOL_GTUNABLE: 2780 rc = ethtool_get_tunable(dev, useraddr); 2781 break; 2782 case ETHTOOL_STUNABLE: 2783 rc = ethtool_set_tunable(dev, useraddr); 2784 break; 2785 case ETHTOOL_GPHYSTATS: 2786 rc = ethtool_get_phy_stats(dev, useraddr); 2787 break; 2788 case ETHTOOL_PERQUEUE: 2789 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 2790 break; 2791 case ETHTOOL_GLINKSETTINGS: 2792 rc = ethtool_get_link_ksettings(dev, useraddr); 2793 break; 2794 case ETHTOOL_SLINKSETTINGS: 2795 rc = ethtool_set_link_ksettings(dev, useraddr); 2796 break; 2797 case ETHTOOL_PHY_GTUNABLE: 2798 rc = get_phy_tunable(dev, useraddr); 2799 break; 2800 case ETHTOOL_PHY_STUNABLE: 2801 rc = set_phy_tunable(dev, useraddr); 2802 break; 2803 case ETHTOOL_GFECPARAM: 2804 rc = ethtool_get_fecparam(dev, useraddr); 2805 break; 2806 case ETHTOOL_SFECPARAM: 2807 rc = ethtool_set_fecparam(dev, useraddr); 2808 break; 2809 default: 2810 rc = -EOPNOTSUPP; 2811 } 2812 2813 if (dev->ethtool_ops->complete) 2814 dev->ethtool_ops->complete(dev); 2815 2816 if (old_features != dev->features) 2817 netdev_features_change(dev); 2818 2819 return rc; 2820 } 2821 2822 struct ethtool_rx_flow_key { 2823 struct flow_dissector_key_basic basic; 2824 union { 2825 struct flow_dissector_key_ipv4_addrs ipv4; 2826 struct flow_dissector_key_ipv6_addrs ipv6; 2827 }; 2828 struct flow_dissector_key_ports tp; 2829 struct flow_dissector_key_ip ip; 2830 struct flow_dissector_key_vlan vlan; 2831 struct flow_dissector_key_eth_addrs eth_addrs; 2832 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 2833 2834 struct ethtool_rx_flow_match { 2835 struct flow_dissector dissector; 2836 struct ethtool_rx_flow_key key; 2837 struct ethtool_rx_flow_key mask; 2838 }; 2839 2840 struct ethtool_rx_flow_rule * 2841 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 2842 { 2843 const struct ethtool_rx_flow_spec *fs = input->fs; 2844 static struct in6_addr zero_addr = {}; 2845 struct ethtool_rx_flow_match *match; 2846 struct ethtool_rx_flow_rule *flow; 2847 struct flow_action_entry *act; 2848 2849 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 2850 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 2851 if (!flow) 2852 return ERR_PTR(-ENOMEM); 2853 2854 /* ethtool_rx supports only one single action per rule. */ 2855 flow->rule = flow_rule_alloc(1); 2856 if (!flow->rule) { 2857 kfree(flow); 2858 return ERR_PTR(-ENOMEM); 2859 } 2860 2861 match = (struct ethtool_rx_flow_match *)flow->priv; 2862 flow->rule->match.dissector = &match->dissector; 2863 flow->rule->match.mask = &match->mask; 2864 flow->rule->match.key = &match->key; 2865 2866 match->mask.basic.n_proto = htons(0xffff); 2867 2868 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2869 case ETHER_FLOW: { 2870 const struct ethhdr *ether_spec, *ether_m_spec; 2871 2872 ether_spec = &fs->h_u.ether_spec; 2873 ether_m_spec = &fs->m_u.ether_spec; 2874 2875 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 2876 ether_addr_copy(match->key.eth_addrs.src, 2877 ether_spec->h_source); 2878 ether_addr_copy(match->mask.eth_addrs.src, 2879 ether_m_spec->h_source); 2880 } 2881 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 2882 ether_addr_copy(match->key.eth_addrs.dst, 2883 ether_spec->h_dest); 2884 ether_addr_copy(match->mask.eth_addrs.dst, 2885 ether_m_spec->h_dest); 2886 } 2887 if (ether_m_spec->h_proto) { 2888 match->key.basic.n_proto = ether_spec->h_proto; 2889 match->mask.basic.n_proto = ether_m_spec->h_proto; 2890 } 2891 } 2892 break; 2893 case TCP_V4_FLOW: 2894 case UDP_V4_FLOW: { 2895 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 2896 2897 match->key.basic.n_proto = htons(ETH_P_IP); 2898 2899 v4_spec = &fs->h_u.tcp_ip4_spec; 2900 v4_m_spec = &fs->m_u.tcp_ip4_spec; 2901 2902 if (v4_m_spec->ip4src) { 2903 match->key.ipv4.src = v4_spec->ip4src; 2904 match->mask.ipv4.src = v4_m_spec->ip4src; 2905 } 2906 if (v4_m_spec->ip4dst) { 2907 match->key.ipv4.dst = v4_spec->ip4dst; 2908 match->mask.ipv4.dst = v4_m_spec->ip4dst; 2909 } 2910 if (v4_m_spec->ip4src || 2911 v4_m_spec->ip4dst) { 2912 match->dissector.used_keys |= 2913 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 2914 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 2915 offsetof(struct ethtool_rx_flow_key, ipv4); 2916 } 2917 if (v4_m_spec->psrc) { 2918 match->key.tp.src = v4_spec->psrc; 2919 match->mask.tp.src = v4_m_spec->psrc; 2920 } 2921 if (v4_m_spec->pdst) { 2922 match->key.tp.dst = v4_spec->pdst; 2923 match->mask.tp.dst = v4_m_spec->pdst; 2924 } 2925 if (v4_m_spec->psrc || 2926 v4_m_spec->pdst) { 2927 match->dissector.used_keys |= 2928 BIT(FLOW_DISSECTOR_KEY_PORTS); 2929 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2930 offsetof(struct ethtool_rx_flow_key, tp); 2931 } 2932 if (v4_m_spec->tos) { 2933 match->key.ip.tos = v4_spec->tos; 2934 match->mask.ip.tos = v4_m_spec->tos; 2935 match->dissector.used_keys |= 2936 BIT(FLOW_DISSECTOR_KEY_IP); 2937 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2938 offsetof(struct ethtool_rx_flow_key, ip); 2939 } 2940 } 2941 break; 2942 case TCP_V6_FLOW: 2943 case UDP_V6_FLOW: { 2944 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 2945 2946 match->key.basic.n_proto = htons(ETH_P_IPV6); 2947 2948 v6_spec = &fs->h_u.tcp_ip6_spec; 2949 v6_m_spec = &fs->m_u.tcp_ip6_spec; 2950 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2951 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 2952 sizeof(match->key.ipv6.src)); 2953 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 2954 sizeof(match->mask.ipv6.src)); 2955 } 2956 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2957 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 2958 sizeof(match->key.ipv6.dst)); 2959 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 2960 sizeof(match->mask.ipv6.dst)); 2961 } 2962 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) || 2963 memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2964 match->dissector.used_keys |= 2965 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 2966 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 2967 offsetof(struct ethtool_rx_flow_key, ipv6); 2968 } 2969 if (v6_m_spec->psrc) { 2970 match->key.tp.src = v6_spec->psrc; 2971 match->mask.tp.src = v6_m_spec->psrc; 2972 } 2973 if (v6_m_spec->pdst) { 2974 match->key.tp.dst = v6_spec->pdst; 2975 match->mask.tp.dst = v6_m_spec->pdst; 2976 } 2977 if (v6_m_spec->psrc || 2978 v6_m_spec->pdst) { 2979 match->dissector.used_keys |= 2980 BIT(FLOW_DISSECTOR_KEY_PORTS); 2981 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2982 offsetof(struct ethtool_rx_flow_key, tp); 2983 } 2984 if (v6_m_spec->tclass) { 2985 match->key.ip.tos = v6_spec->tclass; 2986 match->mask.ip.tos = v6_m_spec->tclass; 2987 match->dissector.used_keys |= 2988 BIT(FLOW_DISSECTOR_KEY_IP); 2989 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2990 offsetof(struct ethtool_rx_flow_key, ip); 2991 } 2992 } 2993 break; 2994 default: 2995 ethtool_rx_flow_rule_destroy(flow); 2996 return ERR_PTR(-EINVAL); 2997 } 2998 2999 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3000 case TCP_V4_FLOW: 3001 case TCP_V6_FLOW: 3002 match->key.basic.ip_proto = IPPROTO_TCP; 3003 break; 3004 case UDP_V4_FLOW: 3005 case UDP_V6_FLOW: 3006 match->key.basic.ip_proto = IPPROTO_UDP; 3007 break; 3008 } 3009 match->mask.basic.ip_proto = 0xff; 3010 3011 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC); 3012 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3013 offsetof(struct ethtool_rx_flow_key, basic); 3014 3015 if (fs->flow_type & FLOW_EXT) { 3016 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3017 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3018 3019 if (ext_m_spec->vlan_etype) { 3020 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3021 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3022 } 3023 3024 if (ext_m_spec->vlan_tci) { 3025 match->key.vlan.vlan_id = 3026 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3027 match->mask.vlan.vlan_id = 3028 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3029 3030 match->key.vlan.vlan_dei = 3031 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3032 match->mask.vlan.vlan_dei = 3033 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3034 3035 match->key.vlan.vlan_priority = 3036 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3037 match->mask.vlan.vlan_priority = 3038 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3039 } 3040 3041 if (ext_m_spec->vlan_etype || 3042 ext_m_spec->vlan_tci) { 3043 match->dissector.used_keys |= 3044 BIT(FLOW_DISSECTOR_KEY_VLAN); 3045 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3046 offsetof(struct ethtool_rx_flow_key, vlan); 3047 } 3048 } 3049 if (fs->flow_type & FLOW_MAC_EXT) { 3050 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3051 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3052 3053 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3054 ETH_ALEN); 3055 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3056 ETH_ALEN); 3057 3058 match->dissector.used_keys |= 3059 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3060 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3061 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3062 } 3063 3064 act = &flow->rule->action.entries[0]; 3065 switch (fs->ring_cookie) { 3066 case RX_CLS_FLOW_DISC: 3067 act->id = FLOW_ACTION_DROP; 3068 break; 3069 case RX_CLS_FLOW_WAKE: 3070 act->id = FLOW_ACTION_WAKE; 3071 break; 3072 default: 3073 act->id = FLOW_ACTION_QUEUE; 3074 if (fs->flow_type & FLOW_RSS) 3075 act->queue.ctx = input->rss_ctx; 3076 3077 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3078 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3079 break; 3080 } 3081 3082 return flow; 3083 } 3084 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3085 3086 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3087 { 3088 kfree(flow->rule); 3089 kfree(flow); 3090 } 3091 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3092