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