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/compat.h> 11 #include <linux/etherdevice.h> 12 #include <linux/module.h> 13 #include <linux/types.h> 14 #include <linux/capability.h> 15 #include <linux/errno.h> 16 #include <linux/ethtool.h> 17 #include <linux/netdevice.h> 18 #include <linux/net_tstamp.h> 19 #include <linux/phy.h> 20 #include <linux/bitops.h> 21 #include <linux/uaccess.h> 22 #include <linux/vmalloc.h> 23 #include <linux/sfp.h> 24 #include <linux/slab.h> 25 #include <linux/rtnetlink.h> 26 #include <linux/sched/signal.h> 27 #include <linux/net.h> 28 #include <linux/pm_runtime.h> 29 #include <linux/utsname.h> 30 #include <net/devlink.h> 31 #include <net/ipv6.h> 32 #include <net/xdp_sock_drv.h> 33 #include <net/flow_offload.h> 34 #include <linux/ethtool_netlink.h> 35 #include "common.h" 36 37 /* State held across locks and calls for commands which have devlink fallback */ 38 struct ethtool_devlink_compat { 39 struct devlink *devlink; 40 union { 41 struct ethtool_flash efl; 42 struct ethtool_drvinfo info; 43 }; 44 }; 45 46 static struct devlink *netdev_to_devlink_get(struct net_device *dev) 47 { 48 if (!dev->devlink_port) 49 return NULL; 50 return devlink_try_get(dev->devlink_port->devlink); 51 } 52 53 /* 54 * Some useful ethtool_ops methods that're device independent. 55 * If we find that all drivers want to do the same thing here, 56 * we can turn these into dev_() function calls. 57 */ 58 59 u32 ethtool_op_get_link(struct net_device *dev) 60 { 61 /* Synchronize carrier state with link watch, see also rtnl_getlink() */ 62 linkwatch_sync_dev(dev); 63 64 return netif_carrier_ok(dev) ? 1 : 0; 65 } 66 EXPORT_SYMBOL(ethtool_op_get_link); 67 68 int ethtool_op_get_ts_info(struct net_device *dev, 69 struct kernel_ethtool_ts_info *info) 70 { 71 info->so_timestamping = 72 SOF_TIMESTAMPING_TX_SOFTWARE | 73 SOF_TIMESTAMPING_RX_SOFTWARE | 74 SOF_TIMESTAMPING_SOFTWARE; 75 info->phc_index = -1; 76 return 0; 77 } 78 EXPORT_SYMBOL(ethtool_op_get_ts_info); 79 80 /* Handlers for each ethtool command */ 81 82 static int ethtool_get_features(struct net_device *dev, void __user *useraddr) 83 { 84 struct ethtool_gfeatures cmd = { 85 .cmd = ETHTOOL_GFEATURES, 86 .size = ETHTOOL_DEV_FEATURE_WORDS, 87 }; 88 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 89 u32 __user *sizeaddr; 90 u32 copy_size; 91 int i; 92 93 /* in case feature bits run out again */ 94 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t)); 95 96 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 97 features[i].available = (u32)(dev->hw_features >> (32 * i)); 98 features[i].requested = (u32)(dev->wanted_features >> (32 * i)); 99 features[i].active = (u32)(dev->features >> (32 * i)); 100 features[i].never_changed = 101 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i)); 102 } 103 104 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size); 105 if (get_user(copy_size, sizeaddr)) 106 return -EFAULT; 107 108 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS) 109 copy_size = ETHTOOL_DEV_FEATURE_WORDS; 110 111 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 112 return -EFAULT; 113 useraddr += sizeof(cmd); 114 if (copy_to_user(useraddr, features, 115 array_size(copy_size, sizeof(*features)))) 116 return -EFAULT; 117 118 return 0; 119 } 120 121 static int ethtool_set_features(struct net_device *dev, void __user *useraddr) 122 { 123 struct ethtool_sfeatures cmd; 124 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 125 netdev_features_t wanted = 0, valid = 0; 126 int i, ret = 0; 127 128 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 129 return -EFAULT; 130 useraddr += sizeof(cmd); 131 132 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS) 133 return -EINVAL; 134 135 if (copy_from_user(features, useraddr, sizeof(features))) 136 return -EFAULT; 137 138 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 139 valid |= (netdev_features_t)features[i].valid << (32 * i); 140 wanted |= (netdev_features_t)features[i].requested << (32 * i); 141 } 142 143 if (valid & ~NETIF_F_ETHTOOL_BITS) 144 return -EINVAL; 145 146 if (valid & ~dev->hw_features) { 147 valid &= dev->hw_features; 148 ret |= ETHTOOL_F_UNSUPPORTED; 149 } 150 151 dev->wanted_features &= ~valid; 152 dev->wanted_features |= wanted & valid; 153 __netdev_update_features(dev); 154 155 if ((dev->wanted_features ^ dev->features) & valid) 156 ret |= ETHTOOL_F_WISH; 157 158 return ret; 159 } 160 161 static int __ethtool_get_sset_count(struct net_device *dev, int sset) 162 { 163 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 164 const struct ethtool_ops *ops = dev->ethtool_ops; 165 166 if (sset == ETH_SS_FEATURES) 167 return ARRAY_SIZE(netdev_features_strings); 168 169 if (sset == ETH_SS_RSS_HASH_FUNCS) 170 return ARRAY_SIZE(rss_hash_func_strings); 171 172 if (sset == ETH_SS_TUNABLES) 173 return ARRAY_SIZE(tunable_strings); 174 175 if (sset == ETH_SS_PHY_TUNABLES) 176 return ARRAY_SIZE(phy_tunable_strings); 177 178 if (sset == ETH_SS_PHY_STATS && dev->phydev && 179 !ops->get_ethtool_phy_stats && 180 phy_ops && phy_ops->get_sset_count) 181 return phy_ops->get_sset_count(dev->phydev); 182 183 if (sset == ETH_SS_LINK_MODES) 184 return __ETHTOOL_LINK_MODE_MASK_NBITS; 185 186 if (ops->get_sset_count && ops->get_strings) 187 return ops->get_sset_count(dev, sset); 188 else 189 return -EOPNOTSUPP; 190 } 191 192 static void __ethtool_get_strings(struct net_device *dev, 193 u32 stringset, u8 *data) 194 { 195 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 196 const struct ethtool_ops *ops = dev->ethtool_ops; 197 198 if (stringset == ETH_SS_FEATURES) 199 memcpy(data, netdev_features_strings, 200 sizeof(netdev_features_strings)); 201 else if (stringset == ETH_SS_RSS_HASH_FUNCS) 202 memcpy(data, rss_hash_func_strings, 203 sizeof(rss_hash_func_strings)); 204 else if (stringset == ETH_SS_TUNABLES) 205 memcpy(data, tunable_strings, sizeof(tunable_strings)); 206 else if (stringset == ETH_SS_PHY_TUNABLES) 207 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings)); 208 else if (stringset == ETH_SS_PHY_STATS && dev->phydev && 209 !ops->get_ethtool_phy_stats && phy_ops && 210 phy_ops->get_strings) 211 phy_ops->get_strings(dev->phydev, data); 212 else if (stringset == ETH_SS_LINK_MODES) 213 memcpy(data, link_mode_names, 214 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN); 215 else 216 /* ops->get_strings is valid because checked earlier */ 217 ops->get_strings(dev, stringset, data); 218 } 219 220 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) 221 { 222 /* feature masks of legacy discrete ethtool ops */ 223 224 switch (eth_cmd) { 225 case ETHTOOL_GTXCSUM: 226 case ETHTOOL_STXCSUM: 227 return NETIF_F_CSUM_MASK | NETIF_F_FCOE_CRC | 228 NETIF_F_SCTP_CRC; 229 case ETHTOOL_GRXCSUM: 230 case ETHTOOL_SRXCSUM: 231 return NETIF_F_RXCSUM; 232 case ETHTOOL_GSG: 233 case ETHTOOL_SSG: 234 return NETIF_F_SG | NETIF_F_FRAGLIST; 235 case ETHTOOL_GTSO: 236 case ETHTOOL_STSO: 237 return NETIF_F_ALL_TSO; 238 case ETHTOOL_GGSO: 239 case ETHTOOL_SGSO: 240 return NETIF_F_GSO; 241 case ETHTOOL_GGRO: 242 case ETHTOOL_SGRO: 243 return NETIF_F_GRO; 244 default: 245 BUG(); 246 } 247 } 248 249 static int ethtool_get_one_feature(struct net_device *dev, 250 char __user *useraddr, u32 ethcmd) 251 { 252 netdev_features_t mask = ethtool_get_feature_mask(ethcmd); 253 struct ethtool_value edata = { 254 .cmd = ethcmd, 255 .data = !!(dev->features & mask), 256 }; 257 258 if (copy_to_user(useraddr, &edata, sizeof(edata))) 259 return -EFAULT; 260 return 0; 261 } 262 263 static int ethtool_set_one_feature(struct net_device *dev, 264 void __user *useraddr, u32 ethcmd) 265 { 266 struct ethtool_value edata; 267 netdev_features_t mask; 268 269 if (copy_from_user(&edata, useraddr, sizeof(edata))) 270 return -EFAULT; 271 272 mask = ethtool_get_feature_mask(ethcmd); 273 mask &= dev->hw_features; 274 if (!mask) 275 return -EOPNOTSUPP; 276 277 if (edata.data) 278 dev->wanted_features |= mask; 279 else 280 dev->wanted_features &= ~mask; 281 282 __netdev_update_features(dev); 283 284 return 0; 285 } 286 287 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ 288 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) 289 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \ 290 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \ 291 NETIF_F_RXHASH) 292 293 static u32 __ethtool_get_flags(struct net_device *dev) 294 { 295 u32 flags = 0; 296 297 if (dev->features & NETIF_F_LRO) 298 flags |= ETH_FLAG_LRO; 299 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX) 300 flags |= ETH_FLAG_RXVLAN; 301 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) 302 flags |= ETH_FLAG_TXVLAN; 303 if (dev->features & NETIF_F_NTUPLE) 304 flags |= ETH_FLAG_NTUPLE; 305 if (dev->features & NETIF_F_RXHASH) 306 flags |= ETH_FLAG_RXHASH; 307 308 return flags; 309 } 310 311 static int __ethtool_set_flags(struct net_device *dev, u32 data) 312 { 313 netdev_features_t features = 0, changed; 314 315 if (data & ~ETH_ALL_FLAGS) 316 return -EINVAL; 317 318 if (data & ETH_FLAG_LRO) 319 features |= NETIF_F_LRO; 320 if (data & ETH_FLAG_RXVLAN) 321 features |= NETIF_F_HW_VLAN_CTAG_RX; 322 if (data & ETH_FLAG_TXVLAN) 323 features |= NETIF_F_HW_VLAN_CTAG_TX; 324 if (data & ETH_FLAG_NTUPLE) 325 features |= NETIF_F_NTUPLE; 326 if (data & ETH_FLAG_RXHASH) 327 features |= NETIF_F_RXHASH; 328 329 /* allow changing only bits set in hw_features */ 330 changed = (features ^ dev->features) & ETH_ALL_FEATURES; 331 if (changed & ~dev->hw_features) 332 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; 333 334 dev->wanted_features = 335 (dev->wanted_features & ~changed) | (features & changed); 336 337 __netdev_update_features(dev); 338 339 return 0; 340 } 341 342 /* Given two link masks, AND them together and save the result in dst. */ 343 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst, 344 struct ethtool_link_ksettings *src) 345 { 346 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS); 347 unsigned int idx = 0; 348 349 for (; idx < size; idx++) { 350 dst->link_modes.supported[idx] &= 351 src->link_modes.supported[idx]; 352 dst->link_modes.advertising[idx] &= 353 src->link_modes.advertising[idx]; 354 } 355 } 356 EXPORT_SYMBOL(ethtool_intersect_link_masks); 357 358 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst, 359 u32 legacy_u32) 360 { 361 linkmode_zero(dst); 362 dst[0] = legacy_u32; 363 } 364 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode); 365 366 /* return false if src had higher bits set. lower bits always updated. */ 367 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, 368 const unsigned long *src) 369 { 370 *legacy_u32 = src[0]; 371 return find_next_bit(src, __ETHTOOL_LINK_MODE_MASK_NBITS, 32) == 372 __ETHTOOL_LINK_MODE_MASK_NBITS; 373 } 374 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); 375 376 /* return false if ksettings link modes had higher bits 377 * set. legacy_settings always updated (best effort) 378 */ 379 static bool 380 convert_link_ksettings_to_legacy_settings( 381 struct ethtool_cmd *legacy_settings, 382 const struct ethtool_link_ksettings *link_ksettings) 383 { 384 bool retval = true; 385 386 memset(legacy_settings, 0, sizeof(*legacy_settings)); 387 /* this also clears the deprecated fields in legacy structure: 388 * __u8 transceiver; 389 * __u32 maxtxpkt; 390 * __u32 maxrxpkt; 391 */ 392 393 retval &= ethtool_convert_link_mode_to_legacy_u32( 394 &legacy_settings->supported, 395 link_ksettings->link_modes.supported); 396 retval &= ethtool_convert_link_mode_to_legacy_u32( 397 &legacy_settings->advertising, 398 link_ksettings->link_modes.advertising); 399 retval &= ethtool_convert_link_mode_to_legacy_u32( 400 &legacy_settings->lp_advertising, 401 link_ksettings->link_modes.lp_advertising); 402 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed); 403 legacy_settings->duplex 404 = link_ksettings->base.duplex; 405 legacy_settings->port 406 = link_ksettings->base.port; 407 legacy_settings->phy_address 408 = link_ksettings->base.phy_address; 409 legacy_settings->autoneg 410 = link_ksettings->base.autoneg; 411 legacy_settings->mdio_support 412 = link_ksettings->base.mdio_support; 413 legacy_settings->eth_tp_mdix 414 = link_ksettings->base.eth_tp_mdix; 415 legacy_settings->eth_tp_mdix_ctrl 416 = link_ksettings->base.eth_tp_mdix_ctrl; 417 legacy_settings->transceiver 418 = link_ksettings->base.transceiver; 419 return retval; 420 } 421 422 /* number of 32-bit words to store the user's link mode bitmaps */ 423 #define __ETHTOOL_LINK_MODE_MASK_NU32 \ 424 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32) 425 426 /* layout of the struct passed from/to userland */ 427 struct ethtool_link_usettings { 428 struct ethtool_link_settings base; 429 struct { 430 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32]; 431 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 432 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 433 } link_modes; 434 }; 435 436 /* Internal kernel helper to query a device ethtool_link_settings. */ 437 int __ethtool_get_link_ksettings(struct net_device *dev, 438 struct ethtool_link_ksettings *link_ksettings) 439 { 440 ASSERT_RTNL(); 441 442 if (!dev->ethtool_ops->get_link_ksettings) 443 return -EOPNOTSUPP; 444 445 memset(link_ksettings, 0, sizeof(*link_ksettings)); 446 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings); 447 } 448 EXPORT_SYMBOL(__ethtool_get_link_ksettings); 449 450 /* convert ethtool_link_usettings in user space to a kernel internal 451 * ethtool_link_ksettings. return 0 on success, errno on error. 452 */ 453 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to, 454 const void __user *from) 455 { 456 struct ethtool_link_usettings link_usettings; 457 458 if (copy_from_user(&link_usettings, from, sizeof(link_usettings))) 459 return -EFAULT; 460 461 memcpy(&to->base, &link_usettings.base, sizeof(to->base)); 462 bitmap_from_arr32(to->link_modes.supported, 463 link_usettings.link_modes.supported, 464 __ETHTOOL_LINK_MODE_MASK_NBITS); 465 bitmap_from_arr32(to->link_modes.advertising, 466 link_usettings.link_modes.advertising, 467 __ETHTOOL_LINK_MODE_MASK_NBITS); 468 bitmap_from_arr32(to->link_modes.lp_advertising, 469 link_usettings.link_modes.lp_advertising, 470 __ETHTOOL_LINK_MODE_MASK_NBITS); 471 472 return 0; 473 } 474 475 /* Check if the user is trying to change anything besides speed/duplex */ 476 bool ethtool_virtdev_validate_cmd(const struct ethtool_link_ksettings *cmd) 477 { 478 struct ethtool_link_settings base2 = {}; 479 480 base2.speed = cmd->base.speed; 481 base2.port = PORT_OTHER; 482 base2.duplex = cmd->base.duplex; 483 base2.cmd = cmd->base.cmd; 484 base2.link_mode_masks_nwords = cmd->base.link_mode_masks_nwords; 485 486 return !memcmp(&base2, &cmd->base, sizeof(base2)) && 487 bitmap_empty(cmd->link_modes.supported, 488 __ETHTOOL_LINK_MODE_MASK_NBITS) && 489 bitmap_empty(cmd->link_modes.lp_advertising, 490 __ETHTOOL_LINK_MODE_MASK_NBITS); 491 } 492 493 /* convert a kernel internal ethtool_link_ksettings to 494 * ethtool_link_usettings in user space. return 0 on success, errno on 495 * error. 496 */ 497 static int 498 store_link_ksettings_for_user(void __user *to, 499 const struct ethtool_link_ksettings *from) 500 { 501 struct ethtool_link_usettings link_usettings; 502 503 memcpy(&link_usettings, from, sizeof(link_usettings)); 504 bitmap_to_arr32(link_usettings.link_modes.supported, 505 from->link_modes.supported, 506 __ETHTOOL_LINK_MODE_MASK_NBITS); 507 bitmap_to_arr32(link_usettings.link_modes.advertising, 508 from->link_modes.advertising, 509 __ETHTOOL_LINK_MODE_MASK_NBITS); 510 bitmap_to_arr32(link_usettings.link_modes.lp_advertising, 511 from->link_modes.lp_advertising, 512 __ETHTOOL_LINK_MODE_MASK_NBITS); 513 514 if (copy_to_user(to, &link_usettings, sizeof(link_usettings))) 515 return -EFAULT; 516 517 return 0; 518 } 519 520 /* Query device for its ethtool_link_settings. */ 521 static int ethtool_get_link_ksettings(struct net_device *dev, 522 void __user *useraddr) 523 { 524 int err = 0; 525 struct ethtool_link_ksettings link_ksettings; 526 527 ASSERT_RTNL(); 528 if (!dev->ethtool_ops->get_link_ksettings) 529 return -EOPNOTSUPP; 530 531 /* handle bitmap nbits handshake */ 532 if (copy_from_user(&link_ksettings.base, useraddr, 533 sizeof(link_ksettings.base))) 534 return -EFAULT; 535 536 if (__ETHTOOL_LINK_MODE_MASK_NU32 537 != link_ksettings.base.link_mode_masks_nwords) { 538 /* wrong link mode nbits requested */ 539 memset(&link_ksettings, 0, sizeof(link_ksettings)); 540 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 541 /* send back number of words required as negative val */ 542 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX, 543 "need too many bits for link modes!"); 544 link_ksettings.base.link_mode_masks_nwords 545 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32); 546 547 /* copy the base fields back to user, not the link 548 * mode bitmaps 549 */ 550 if (copy_to_user(useraddr, &link_ksettings.base, 551 sizeof(link_ksettings.base))) 552 return -EFAULT; 553 554 return 0; 555 } 556 557 /* handshake successful: user/kernel agree on 558 * link_mode_masks_nwords 559 */ 560 561 memset(&link_ksettings, 0, sizeof(link_ksettings)); 562 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 563 if (err < 0) 564 return err; 565 566 /* make sure we tell the right values to user */ 567 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 568 link_ksettings.base.link_mode_masks_nwords 569 = __ETHTOOL_LINK_MODE_MASK_NU32; 570 link_ksettings.base.master_slave_cfg = MASTER_SLAVE_CFG_UNSUPPORTED; 571 link_ksettings.base.master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; 572 link_ksettings.base.rate_matching = RATE_MATCH_NONE; 573 574 return store_link_ksettings_for_user(useraddr, &link_ksettings); 575 } 576 577 /* Update device ethtool_link_settings. */ 578 static int ethtool_set_link_ksettings(struct net_device *dev, 579 void __user *useraddr) 580 { 581 struct ethtool_link_ksettings link_ksettings = {}; 582 int err; 583 584 ASSERT_RTNL(); 585 586 if (!dev->ethtool_ops->set_link_ksettings) 587 return -EOPNOTSUPP; 588 589 /* make sure nbits field has expected value */ 590 if (copy_from_user(&link_ksettings.base, useraddr, 591 sizeof(link_ksettings.base))) 592 return -EFAULT; 593 594 if (__ETHTOOL_LINK_MODE_MASK_NU32 595 != link_ksettings.base.link_mode_masks_nwords) 596 return -EINVAL; 597 598 /* copy the whole structure, now that we know it has expected 599 * format 600 */ 601 err = load_link_ksettings_from_user(&link_ksettings, useraddr); 602 if (err) 603 return err; 604 605 /* re-check nwords field, just in case */ 606 if (__ETHTOOL_LINK_MODE_MASK_NU32 607 != link_ksettings.base.link_mode_masks_nwords) 608 return -EINVAL; 609 610 if (link_ksettings.base.master_slave_cfg || 611 link_ksettings.base.master_slave_state) 612 return -EINVAL; 613 614 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 615 if (err >= 0) { 616 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 617 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 618 } 619 return err; 620 } 621 622 int ethtool_virtdev_set_link_ksettings(struct net_device *dev, 623 const struct ethtool_link_ksettings *cmd, 624 u32 *dev_speed, u8 *dev_duplex) 625 { 626 u32 speed; 627 u8 duplex; 628 629 speed = cmd->base.speed; 630 duplex = cmd->base.duplex; 631 /* don't allow custom speed and duplex */ 632 if (!ethtool_validate_speed(speed) || 633 !ethtool_validate_duplex(duplex) || 634 !ethtool_virtdev_validate_cmd(cmd)) 635 return -EINVAL; 636 *dev_speed = speed; 637 *dev_duplex = duplex; 638 639 return 0; 640 } 641 EXPORT_SYMBOL(ethtool_virtdev_set_link_ksettings); 642 643 /* Query device for its ethtool_cmd settings. 644 * 645 * Backward compatibility note: for compatibility with legacy ethtool, this is 646 * now implemented via get_link_ksettings. When driver reports higher link mode 647 * bits, a kernel warning is logged once (with name of 1st driver/device) to 648 * recommend user to upgrade ethtool, but the command is successful (only the 649 * lower link mode bits reported back to user). Deprecated fields from 650 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero. 651 */ 652 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) 653 { 654 struct ethtool_link_ksettings link_ksettings; 655 struct ethtool_cmd cmd; 656 int err; 657 658 ASSERT_RTNL(); 659 if (!dev->ethtool_ops->get_link_ksettings) 660 return -EOPNOTSUPP; 661 662 if (dev->ethtool->module_fw_flash_in_progress) 663 return -EBUSY; 664 665 memset(&link_ksettings, 0, sizeof(link_ksettings)); 666 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 667 if (err < 0) 668 return err; 669 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings); 670 671 /* send a sensible cmd tag back to user */ 672 cmd.cmd = ETHTOOL_GSET; 673 674 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 675 return -EFAULT; 676 677 return 0; 678 } 679 680 /* Update device link settings with given ethtool_cmd. 681 * 682 * Backward compatibility note: for compatibility with legacy ethtool, this is 683 * now always implemented via set_link_settings. When user's request updates 684 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel 685 * warning is logged once (with name of 1st driver/device) to recommend user to 686 * upgrade ethtool, and the request is rejected. 687 */ 688 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) 689 { 690 struct ethtool_link_ksettings link_ksettings; 691 struct ethtool_cmd cmd; 692 int ret; 693 694 ASSERT_RTNL(); 695 696 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 697 return -EFAULT; 698 if (!dev->ethtool_ops->set_link_ksettings) 699 return -EOPNOTSUPP; 700 701 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd)) 702 return -EINVAL; 703 link_ksettings.base.link_mode_masks_nwords = 704 __ETHTOOL_LINK_MODE_MASK_NU32; 705 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 706 if (ret >= 0) { 707 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 708 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 709 } 710 return ret; 711 } 712 713 static int 714 ethtool_get_drvinfo(struct net_device *dev, struct ethtool_devlink_compat *rsp) 715 { 716 const struct ethtool_ops *ops = dev->ethtool_ops; 717 struct device *parent = dev->dev.parent; 718 719 rsp->info.cmd = ETHTOOL_GDRVINFO; 720 strscpy(rsp->info.version, init_uts_ns.name.release, 721 sizeof(rsp->info.version)); 722 if (ops->get_drvinfo) { 723 ops->get_drvinfo(dev, &rsp->info); 724 if (!rsp->info.bus_info[0] && parent) 725 strscpy(rsp->info.bus_info, dev_name(parent), 726 sizeof(rsp->info.bus_info)); 727 if (!rsp->info.driver[0] && parent && parent->driver) 728 strscpy(rsp->info.driver, parent->driver->name, 729 sizeof(rsp->info.driver)); 730 } else if (parent && parent->driver) { 731 strscpy(rsp->info.bus_info, dev_name(parent), 732 sizeof(rsp->info.bus_info)); 733 strscpy(rsp->info.driver, parent->driver->name, 734 sizeof(rsp->info.driver)); 735 } else if (dev->rtnl_link_ops) { 736 strscpy(rsp->info.driver, dev->rtnl_link_ops->kind, 737 sizeof(rsp->info.driver)); 738 } else { 739 return -EOPNOTSUPP; 740 } 741 742 /* 743 * this method of obtaining string set info is deprecated; 744 * Use ETHTOOL_GSSET_INFO instead. 745 */ 746 if (ops->get_sset_count) { 747 int rc; 748 749 rc = ops->get_sset_count(dev, ETH_SS_TEST); 750 if (rc >= 0) 751 rsp->info.testinfo_len = rc; 752 rc = ops->get_sset_count(dev, ETH_SS_STATS); 753 if (rc >= 0) 754 rsp->info.n_stats = rc; 755 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); 756 if (rc >= 0) 757 rsp->info.n_priv_flags = rc; 758 } 759 if (ops->get_regs_len) { 760 int ret = ops->get_regs_len(dev); 761 762 if (ret > 0) 763 rsp->info.regdump_len = ret; 764 } 765 766 if (ops->get_eeprom_len) 767 rsp->info.eedump_len = ops->get_eeprom_len(dev); 768 769 if (!rsp->info.fw_version[0]) 770 rsp->devlink = netdev_to_devlink_get(dev); 771 772 return 0; 773 } 774 775 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, 776 void __user *useraddr) 777 { 778 struct ethtool_sset_info info; 779 u64 sset_mask; 780 int i, idx = 0, n_bits = 0, ret, rc; 781 u32 *info_buf = NULL; 782 783 if (copy_from_user(&info, useraddr, sizeof(info))) 784 return -EFAULT; 785 786 /* store copy of mask, because we zero struct later on */ 787 sset_mask = info.sset_mask; 788 if (!sset_mask) 789 return 0; 790 791 /* calculate size of return buffer */ 792 n_bits = hweight64(sset_mask); 793 794 memset(&info, 0, sizeof(info)); 795 info.cmd = ETHTOOL_GSSET_INFO; 796 797 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER); 798 if (!info_buf) 799 return -ENOMEM; 800 801 /* 802 * fill return buffer based on input bitmask and successful 803 * get_sset_count return 804 */ 805 for (i = 0; i < 64; i++) { 806 if (!(sset_mask & (1ULL << i))) 807 continue; 808 809 rc = __ethtool_get_sset_count(dev, i); 810 if (rc >= 0) { 811 info.sset_mask |= (1ULL << i); 812 info_buf[idx++] = rc; 813 } 814 } 815 816 ret = -EFAULT; 817 if (copy_to_user(useraddr, &info, sizeof(info))) 818 goto out; 819 820 useraddr += offsetof(struct ethtool_sset_info, data); 821 if (copy_to_user(useraddr, info_buf, array_size(idx, sizeof(u32)))) 822 goto out; 823 824 ret = 0; 825 826 out: 827 kfree(info_buf); 828 return ret; 829 } 830 831 static noinline_for_stack int 832 ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc, 833 const struct compat_ethtool_rxnfc __user *useraddr, 834 size_t size) 835 { 836 struct compat_ethtool_rxnfc crxnfc = {}; 837 838 /* We expect there to be holes between fs.m_ext and 839 * fs.ring_cookie and at the end of fs, but nowhere else. 840 * On non-x86, no conversion should be needed. 841 */ 842 BUILD_BUG_ON(!IS_ENABLED(CONFIG_X86_64) && 843 sizeof(struct compat_ethtool_rxnfc) != 844 sizeof(struct ethtool_rxnfc)); 845 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + 846 sizeof(useraddr->fs.m_ext) != 847 offsetof(struct ethtool_rxnfc, fs.m_ext) + 848 sizeof(rxnfc->fs.m_ext)); 849 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.location) - 850 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != 851 offsetof(struct ethtool_rxnfc, fs.location) - 852 offsetof(struct ethtool_rxnfc, fs.ring_cookie)); 853 854 if (copy_from_user(&crxnfc, useraddr, min(size, sizeof(crxnfc)))) 855 return -EFAULT; 856 857 *rxnfc = (struct ethtool_rxnfc) { 858 .cmd = crxnfc.cmd, 859 .flow_type = crxnfc.flow_type, 860 .data = crxnfc.data, 861 .fs = { 862 .flow_type = crxnfc.fs.flow_type, 863 .h_u = crxnfc.fs.h_u, 864 .h_ext = crxnfc.fs.h_ext, 865 .m_u = crxnfc.fs.m_u, 866 .m_ext = crxnfc.fs.m_ext, 867 .ring_cookie = crxnfc.fs.ring_cookie, 868 .location = crxnfc.fs.location, 869 }, 870 .rule_cnt = crxnfc.rule_cnt, 871 }; 872 873 return 0; 874 } 875 876 static int ethtool_rxnfc_copy_from_user(struct ethtool_rxnfc *rxnfc, 877 const void __user *useraddr, 878 size_t size) 879 { 880 if (compat_need_64bit_alignment_fixup()) 881 return ethtool_rxnfc_copy_from_compat(rxnfc, useraddr, size); 882 883 if (copy_from_user(rxnfc, useraddr, size)) 884 return -EFAULT; 885 886 return 0; 887 } 888 889 static int ethtool_rxnfc_copy_to_compat(void __user *useraddr, 890 const struct ethtool_rxnfc *rxnfc, 891 size_t size, const u32 *rule_buf) 892 { 893 struct compat_ethtool_rxnfc crxnfc; 894 895 memset(&crxnfc, 0, sizeof(crxnfc)); 896 crxnfc = (struct compat_ethtool_rxnfc) { 897 .cmd = rxnfc->cmd, 898 .flow_type = rxnfc->flow_type, 899 .data = rxnfc->data, 900 .fs = { 901 .flow_type = rxnfc->fs.flow_type, 902 .h_u = rxnfc->fs.h_u, 903 .h_ext = rxnfc->fs.h_ext, 904 .m_u = rxnfc->fs.m_u, 905 .m_ext = rxnfc->fs.m_ext, 906 .ring_cookie = rxnfc->fs.ring_cookie, 907 .location = rxnfc->fs.location, 908 }, 909 .rule_cnt = rxnfc->rule_cnt, 910 }; 911 912 if (copy_to_user(useraddr, &crxnfc, min(size, sizeof(crxnfc)))) 913 return -EFAULT; 914 915 return 0; 916 } 917 918 static int ethtool_rxnfc_copy_struct(u32 cmd, struct ethtool_rxnfc *info, 919 size_t *info_size, void __user *useraddr) 920 { 921 /* struct ethtool_rxnfc was originally defined for 922 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 923 * members. User-space might still be using that 924 * definition. 925 */ 926 if (cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) 927 *info_size = (offsetof(struct ethtool_rxnfc, data) + 928 sizeof(info->data)); 929 930 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size)) 931 return -EFAULT; 932 933 if ((cmd == ETHTOOL_GRXFH || cmd == ETHTOOL_SRXFH) && info->flow_type & FLOW_RSS) { 934 *info_size = sizeof(*info); 935 if (ethtool_rxnfc_copy_from_user(info, useraddr, *info_size)) 936 return -EFAULT; 937 /* Since malicious users may modify the original data, 938 * we need to check whether FLOW_RSS is still requested. 939 */ 940 if (!(info->flow_type & FLOW_RSS)) 941 return -EINVAL; 942 } 943 944 if (info->cmd != cmd) 945 return -EINVAL; 946 947 return 0; 948 } 949 950 static int ethtool_rxnfc_copy_to_user(void __user *useraddr, 951 const struct ethtool_rxnfc *rxnfc, 952 size_t size, const u32 *rule_buf) 953 { 954 int ret; 955 956 if (compat_need_64bit_alignment_fixup()) { 957 ret = ethtool_rxnfc_copy_to_compat(useraddr, rxnfc, size, 958 rule_buf); 959 useraddr += offsetof(struct compat_ethtool_rxnfc, rule_locs); 960 } else { 961 ret = copy_to_user(useraddr, rxnfc, size); 962 useraddr += offsetof(struct ethtool_rxnfc, rule_locs); 963 } 964 965 if (ret) 966 return -EFAULT; 967 968 if (rule_buf) { 969 if (copy_to_user(useraddr, rule_buf, 970 rxnfc->rule_cnt * sizeof(u32))) 971 return -EFAULT; 972 } 973 974 return 0; 975 } 976 977 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, 978 u32 cmd, void __user *useraddr) 979 { 980 const struct ethtool_ops *ops = dev->ethtool_ops; 981 struct ethtool_rxnfc info; 982 size_t info_size = sizeof(info); 983 int rc; 984 985 if (!ops->set_rxnfc) 986 return -EOPNOTSUPP; 987 988 rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr); 989 if (rc) 990 return rc; 991 992 if (ops->get_rxfh) { 993 struct ethtool_rxfh_param rxfh = {}; 994 995 rc = ops->get_rxfh(dev, &rxfh); 996 if (rc) 997 return rc; 998 999 /* Sanity check: if symmetric-xor is set, then: 1000 * 1 - no other fields besides IP src/dst and/or L4 src/dst 1001 * 2 - If src is set, dst must also be set 1002 */ 1003 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) && 1004 ((info.data & ~(RXH_IP_SRC | RXH_IP_DST | 1005 RXH_L4_B_0_1 | RXH_L4_B_2_3)) || 1006 (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) || 1007 (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3)))) 1008 return -EINVAL; 1009 } 1010 1011 rc = ops->set_rxnfc(dev, &info); 1012 if (rc) 1013 return rc; 1014 1015 if (cmd == ETHTOOL_SRXCLSRLINS && 1016 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL)) 1017 return -EFAULT; 1018 1019 return 0; 1020 } 1021 1022 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 1023 u32 cmd, void __user *useraddr) 1024 { 1025 struct ethtool_rxnfc info; 1026 size_t info_size = sizeof(info); 1027 const struct ethtool_ops *ops = dev->ethtool_ops; 1028 int ret; 1029 void *rule_buf = NULL; 1030 1031 if (!ops->get_rxnfc) 1032 return -EOPNOTSUPP; 1033 1034 ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr); 1035 if (ret) 1036 return ret; 1037 1038 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 1039 if (info.rule_cnt > 0) { 1040 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 1041 rule_buf = kcalloc(info.rule_cnt, sizeof(u32), 1042 GFP_USER); 1043 if (!rule_buf) 1044 return -ENOMEM; 1045 } 1046 } 1047 1048 ret = ops->get_rxnfc(dev, &info, rule_buf); 1049 if (ret < 0) 1050 goto err_out; 1051 1052 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf); 1053 err_out: 1054 kfree(rule_buf); 1055 1056 return ret; 1057 } 1058 1059 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 1060 struct ethtool_rxnfc *rx_rings, 1061 u32 size) 1062 { 1063 int i; 1064 1065 if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0])))) 1066 return -EFAULT; 1067 1068 /* Validate ring indices */ 1069 for (i = 0; i < size; i++) 1070 if (indir[i] >= rx_rings->data) 1071 return -EINVAL; 1072 1073 return 0; 1074 } 1075 1076 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; 1077 1078 void netdev_rss_key_fill(void *buffer, size_t len) 1079 { 1080 BUG_ON(len > sizeof(netdev_rss_key)); 1081 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 1082 memcpy(buffer, netdev_rss_key, len); 1083 } 1084 EXPORT_SYMBOL(netdev_rss_key_fill); 1085 1086 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 1087 void __user *useraddr) 1088 { 1089 struct ethtool_rxfh_param rxfh = {}; 1090 u32 user_size; 1091 int ret; 1092 1093 if (!dev->ethtool_ops->get_rxfh_indir_size || 1094 !dev->ethtool_ops->get_rxfh) 1095 return -EOPNOTSUPP; 1096 rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 1097 if (rxfh.indir_size == 0) 1098 return -EOPNOTSUPP; 1099 1100 if (copy_from_user(&user_size, 1101 useraddr + offsetof(struct ethtool_rxfh_indir, size), 1102 sizeof(user_size))) 1103 return -EFAULT; 1104 1105 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 1106 &rxfh.indir_size, sizeof(rxfh.indir_size))) 1107 return -EFAULT; 1108 1109 /* If the user buffer size is 0, this is just a query for the 1110 * device table size. Otherwise, if it's smaller than the 1111 * device table size it's an error. 1112 */ 1113 if (user_size < rxfh.indir_size) 1114 return user_size == 0 ? 0 : -EINVAL; 1115 1116 rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER); 1117 if (!rxfh.indir) 1118 return -ENOMEM; 1119 1120 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh); 1121 if (ret) 1122 goto out; 1123 if (copy_to_user(useraddr + 1124 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 1125 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir))) 1126 ret = -EFAULT; 1127 1128 out: 1129 kfree(rxfh.indir); 1130 return ret; 1131 } 1132 1133 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 1134 void __user *useraddr) 1135 { 1136 const struct ethtool_ops *ops = dev->ethtool_ops; 1137 struct ethtool_rxfh_param rxfh_dev = {}; 1138 struct netlink_ext_ack *extack = NULL; 1139 struct ethtool_rxnfc rx_rings; 1140 u32 user_size, i; 1141 int ret; 1142 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 1143 1144 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 1145 !ops->get_rxnfc) 1146 return -EOPNOTSUPP; 1147 1148 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev); 1149 if (rxfh_dev.indir_size == 0) 1150 return -EOPNOTSUPP; 1151 1152 if (copy_from_user(&user_size, 1153 useraddr + offsetof(struct ethtool_rxfh_indir, size), 1154 sizeof(user_size))) 1155 return -EFAULT; 1156 1157 if (user_size != 0 && user_size != rxfh_dev.indir_size) 1158 return -EINVAL; 1159 1160 rxfh_dev.indir = kcalloc(rxfh_dev.indir_size, 1161 sizeof(rxfh_dev.indir[0]), GFP_USER); 1162 if (!rxfh_dev.indir) 1163 return -ENOMEM; 1164 1165 rx_rings.cmd = ETHTOOL_GRXRINGS; 1166 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1167 if (ret) 1168 goto out; 1169 1170 if (user_size == 0) { 1171 u32 *indir = rxfh_dev.indir; 1172 1173 for (i = 0; i < rxfh_dev.indir_size; i++) 1174 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1175 } else { 1176 ret = ethtool_copy_validate_indir(rxfh_dev.indir, 1177 useraddr + ringidx_offset, 1178 &rx_rings, 1179 rxfh_dev.indir_size); 1180 if (ret) 1181 goto out; 1182 } 1183 1184 rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE; 1185 ret = ops->set_rxfh(dev, &rxfh_dev, extack); 1186 if (ret) 1187 goto out; 1188 1189 /* indicate whether rxfh was set to default */ 1190 if (user_size == 0) 1191 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1192 else 1193 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1194 1195 out: 1196 kfree(rxfh_dev.indir); 1197 return ret; 1198 } 1199 1200 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 1201 void __user *useraddr) 1202 { 1203 const struct ethtool_ops *ops = dev->ethtool_ops; 1204 struct ethtool_rxfh_param rxfh_dev = {}; 1205 u32 user_indir_size, user_key_size; 1206 struct ethtool_rxfh_context *ctx; 1207 struct ethtool_rxfh rxfh; 1208 u32 indir_bytes; 1209 u8 *rss_config; 1210 u32 total_size; 1211 int ret; 1212 1213 if (!ops->get_rxfh) 1214 return -EOPNOTSUPP; 1215 1216 if (ops->get_rxfh_indir_size) 1217 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev); 1218 if (ops->get_rxfh_key_size) 1219 rxfh_dev.key_size = ops->get_rxfh_key_size(dev); 1220 1221 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1222 return -EFAULT; 1223 user_indir_size = rxfh.indir_size; 1224 user_key_size = rxfh.key_size; 1225 1226 /* Check that reserved fields are 0 for now */ 1227 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) 1228 return -EINVAL; 1229 /* Most drivers don't handle rss_context, check it's 0 as well */ 1230 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported || 1231 ops->create_rxfh_context)) 1232 return -EOPNOTSUPP; 1233 1234 rxfh.indir_size = rxfh_dev.indir_size; 1235 rxfh.key_size = rxfh_dev.key_size; 1236 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1237 return -EFAULT; 1238 1239 if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) || 1240 (user_key_size && user_key_size != rxfh_dev.key_size)) 1241 return -EINVAL; 1242 1243 indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]); 1244 total_size = indir_bytes + user_key_size; 1245 rss_config = kzalloc(total_size, GFP_USER); 1246 if (!rss_config) 1247 return -ENOMEM; 1248 1249 if (user_indir_size) 1250 rxfh_dev.indir = (u32 *)rss_config; 1251 1252 if (user_key_size) 1253 rxfh_dev.key = rss_config + indir_bytes; 1254 1255 if (rxfh.rss_context) { 1256 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context); 1257 if (!ctx) { 1258 ret = -ENOENT; 1259 goto out; 1260 } 1261 if (rxfh_dev.indir) 1262 memcpy(rxfh_dev.indir, ethtool_rxfh_context_indir(ctx), 1263 indir_bytes); 1264 if (!ops->rxfh_per_ctx_key) { 1265 rxfh_dev.key_size = 0; 1266 } else { 1267 if (rxfh_dev.key) 1268 memcpy(rxfh_dev.key, 1269 ethtool_rxfh_context_key(ctx), 1270 user_key_size); 1271 rxfh_dev.hfunc = ctx->hfunc; 1272 } 1273 rxfh_dev.input_xfrm = ctx->input_xfrm; 1274 ret = 0; 1275 } else { 1276 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev); 1277 if (ret) 1278 goto out; 1279 } 1280 1281 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1282 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) { 1283 ret = -EFAULT; 1284 } else if (copy_to_user(useraddr + 1285 offsetof(struct ethtool_rxfh, input_xfrm), 1286 &rxfh_dev.input_xfrm, 1287 sizeof(rxfh.input_xfrm))) { 1288 ret = -EFAULT; 1289 } else if (copy_to_user(useraddr + 1290 offsetof(struct ethtool_rxfh, key_size), 1291 &rxfh_dev.key_size, 1292 sizeof(rxfh.key_size))) { 1293 ret = -EFAULT; 1294 } else if (copy_to_user(useraddr + 1295 offsetof(struct ethtool_rxfh, rss_config[0]), 1296 rss_config, total_size)) { 1297 ret = -EFAULT; 1298 } 1299 out: 1300 kfree(rss_config); 1301 1302 return ret; 1303 } 1304 1305 static struct ethtool_rxfh_context * 1306 ethtool_rxfh_ctx_alloc(const struct ethtool_ops *ops, 1307 u32 indir_size, u32 key_size) 1308 { 1309 size_t indir_bytes, flex_len, key_off, size; 1310 struct ethtool_rxfh_context *ctx; 1311 u32 priv_bytes, indir_max; 1312 u16 key_max; 1313 1314 key_max = max(key_size, ops->rxfh_key_space); 1315 indir_max = max(indir_size, ops->rxfh_indir_space); 1316 1317 priv_bytes = ALIGN(ops->rxfh_priv_size, sizeof(u32)); 1318 indir_bytes = array_size(indir_max, sizeof(u32)); 1319 1320 key_off = size_add(priv_bytes, indir_bytes); 1321 flex_len = size_add(key_off, key_max); 1322 size = struct_size_t(struct ethtool_rxfh_context, data, flex_len); 1323 1324 ctx = kzalloc(size, GFP_KERNEL_ACCOUNT); 1325 if (!ctx) 1326 return NULL; 1327 1328 ctx->indir_size = indir_size; 1329 ctx->key_size = key_size; 1330 ctx->key_off = key_off; 1331 ctx->priv_size = ops->rxfh_priv_size; 1332 1333 ctx->hfunc = ETH_RSS_HASH_NO_CHANGE; 1334 ctx->input_xfrm = RXH_XFRM_NO_CHANGE; 1335 1336 return ctx; 1337 } 1338 1339 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1340 void __user *useraddr) 1341 { 1342 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1343 const struct ethtool_ops *ops = dev->ethtool_ops; 1344 u32 dev_indir_size = 0, dev_key_size = 0, i; 1345 u32 user_indir_len = 0, indir_bytes = 0; 1346 struct ethtool_rxfh_param rxfh_dev = {}; 1347 struct ethtool_rxfh_context *ctx = NULL; 1348 struct netlink_ext_ack *extack = NULL; 1349 struct ethtool_rxnfc rx_rings; 1350 struct ethtool_rxfh rxfh; 1351 bool locked = false; /* dev->ethtool->rss_lock taken */ 1352 bool create = false; 1353 u8 *rss_config; 1354 int ret; 1355 1356 if (!ops->get_rxnfc || !ops->set_rxfh) 1357 return -EOPNOTSUPP; 1358 1359 if (ops->get_rxfh_indir_size) 1360 dev_indir_size = ops->get_rxfh_indir_size(dev); 1361 if (ops->get_rxfh_key_size) 1362 dev_key_size = ops->get_rxfh_key_size(dev); 1363 1364 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1365 return -EFAULT; 1366 1367 /* Check that reserved fields are 0 for now */ 1368 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) 1369 return -EINVAL; 1370 /* Most drivers don't handle rss_context, check it's 0 as well */ 1371 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported || 1372 ops->create_rxfh_context)) 1373 return -EOPNOTSUPP; 1374 /* Check input data transformation capabilities */ 1375 if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR && 1376 rxfh.input_xfrm != RXH_XFRM_NO_CHANGE) 1377 return -EINVAL; 1378 if (rxfh.input_xfrm != RXH_XFRM_NO_CHANGE && 1379 (rxfh.input_xfrm & RXH_XFRM_SYM_XOR) && 1380 !ops->cap_rss_sym_xor_supported) 1381 return -EOPNOTSUPP; 1382 create = rxfh.rss_context == ETH_RXFH_CONTEXT_ALLOC; 1383 1384 if ((rxfh.indir_size && 1385 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1386 rxfh.indir_size != dev_indir_size) || 1387 (rxfh.key_size && rxfh.key_size != dev_key_size)) 1388 return -EINVAL; 1389 1390 /* Must request at least one change: indir size, hash key, function 1391 * or input transformation. 1392 * There's no need for any of it in case of context creation. 1393 */ 1394 if (!create && 1395 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1396 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE && 1397 rxfh.input_xfrm == RXH_XFRM_NO_CHANGE)) 1398 return -EINVAL; 1399 1400 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]); 1401 1402 /* Check settings which may be global rather than per RSS-context */ 1403 if (rxfh.rss_context && !ops->rxfh_per_ctx_key) 1404 if (rxfh.key_size || 1405 (rxfh.hfunc && rxfh.hfunc != ETH_RSS_HASH_NO_CHANGE) || 1406 (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)) 1407 return -EOPNOTSUPP; 1408 1409 rss_config = kzalloc(indir_bytes + dev_key_size, GFP_USER); 1410 if (!rss_config) 1411 return -ENOMEM; 1412 1413 rx_rings.cmd = ETHTOOL_GRXRINGS; 1414 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1415 if (ret) 1416 goto out; 1417 1418 /* rxfh.indir_size == 0 means reset the indir table to default (master 1419 * context) or delete the context (other RSS contexts). 1420 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1421 */ 1422 if (rxfh.indir_size && 1423 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1424 user_indir_len = indir_bytes; 1425 rxfh_dev.indir = (u32 *)rss_config; 1426 rxfh_dev.indir_size = dev_indir_size; 1427 ret = ethtool_copy_validate_indir(rxfh_dev.indir, 1428 useraddr + rss_cfg_offset, 1429 &rx_rings, 1430 rxfh.indir_size); 1431 if (ret) 1432 goto out; 1433 } else if (rxfh.indir_size == 0) { 1434 if (rxfh.rss_context == 0) { 1435 u32 *indir; 1436 1437 rxfh_dev.indir = (u32 *)rss_config; 1438 rxfh_dev.indir_size = dev_indir_size; 1439 indir = rxfh_dev.indir; 1440 for (i = 0; i < dev_indir_size; i++) 1441 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1442 } else { 1443 rxfh_dev.rss_delete = true; 1444 } 1445 } 1446 1447 if (rxfh.key_size) { 1448 rxfh_dev.key_size = dev_key_size; 1449 rxfh_dev.key = rss_config + indir_bytes; 1450 if (copy_from_user(rxfh_dev.key, 1451 useraddr + rss_cfg_offset + user_indir_len, 1452 rxfh.key_size)) { 1453 ret = -EFAULT; 1454 goto out; 1455 } 1456 } 1457 1458 if (rxfh.rss_context) { 1459 mutex_lock(&dev->ethtool->rss_lock); 1460 locked = true; 1461 } 1462 if (create) { 1463 if (rxfh_dev.rss_delete) { 1464 ret = -EINVAL; 1465 goto out; 1466 } 1467 ctx = ethtool_rxfh_ctx_alloc(ops, dev_indir_size, dev_key_size); 1468 if (!ctx) { 1469 ret = -ENOMEM; 1470 goto out; 1471 } 1472 1473 if (ops->create_rxfh_context) { 1474 u32 limit = ops->rxfh_max_num_contexts ?: U32_MAX; 1475 u32 ctx_id; 1476 1477 /* driver uses new API, core allocates ID */ 1478 ret = xa_alloc(&dev->ethtool->rss_ctx, &ctx_id, ctx, 1479 XA_LIMIT(1, limit - 1), 1480 GFP_KERNEL_ACCOUNT); 1481 if (ret < 0) { 1482 kfree(ctx); 1483 goto out; 1484 } 1485 WARN_ON(!ctx_id); /* can't happen */ 1486 rxfh.rss_context = ctx_id; 1487 } 1488 } else if (rxfh.rss_context) { 1489 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context); 1490 if (!ctx) { 1491 ret = -ENOENT; 1492 goto out; 1493 } 1494 } 1495 rxfh_dev.hfunc = rxfh.hfunc; 1496 rxfh_dev.rss_context = rxfh.rss_context; 1497 rxfh_dev.input_xfrm = rxfh.input_xfrm; 1498 1499 if (rxfh.rss_context && ops->create_rxfh_context) { 1500 if (create) { 1501 ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev, 1502 extack); 1503 /* Make sure driver populates defaults */ 1504 WARN_ON_ONCE(!ret && !rxfh_dev.key && 1505 !memchr_inv(ethtool_rxfh_context_key(ctx), 1506 0, ctx->key_size)); 1507 } else if (rxfh_dev.rss_delete) { 1508 ret = ops->remove_rxfh_context(dev, ctx, 1509 rxfh.rss_context, 1510 extack); 1511 } else { 1512 ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev, 1513 extack); 1514 } 1515 } else { 1516 ret = ops->set_rxfh(dev, &rxfh_dev, extack); 1517 } 1518 if (ret) { 1519 if (create) { 1520 /* failed to create, free our new tracking entry */ 1521 if (ops->create_rxfh_context) 1522 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context); 1523 kfree(ctx); 1524 } 1525 goto out; 1526 } 1527 1528 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1529 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context))) 1530 ret = -EFAULT; 1531 1532 if (!rxfh_dev.rss_context) { 1533 /* indicate whether rxfh was set to default */ 1534 if (rxfh.indir_size == 0) 1535 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1536 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1537 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1538 } 1539 /* Update rss_ctx tracking */ 1540 if (create && !ops->create_rxfh_context) { 1541 /* driver uses old API, it chose context ID */ 1542 if (WARN_ON(xa_load(&dev->ethtool->rss_ctx, rxfh_dev.rss_context))) { 1543 /* context ID reused, our tracking is screwed */ 1544 kfree(ctx); 1545 goto out; 1546 } 1547 /* Allocate the exact ID the driver gave us */ 1548 if (xa_is_err(xa_store(&dev->ethtool->rss_ctx, rxfh_dev.rss_context, 1549 ctx, GFP_KERNEL))) { 1550 kfree(ctx); 1551 goto out; 1552 } 1553 1554 /* Fetch the defaults for the old API, in the new API drivers 1555 * should write defaults into ctx themselves. 1556 */ 1557 rxfh_dev.indir = (u32 *)rss_config; 1558 rxfh_dev.indir_size = dev_indir_size; 1559 1560 rxfh_dev.key = rss_config + indir_bytes; 1561 rxfh_dev.key_size = dev_key_size; 1562 1563 ret = ops->get_rxfh(dev, &rxfh_dev); 1564 if (WARN_ON(ret)) { 1565 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context); 1566 kfree(ctx); 1567 goto out; 1568 } 1569 } 1570 if (rxfh_dev.rss_delete) { 1571 WARN_ON(xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context) != ctx); 1572 kfree(ctx); 1573 } else if (ctx) { 1574 if (rxfh_dev.indir) { 1575 for (i = 0; i < dev_indir_size; i++) 1576 ethtool_rxfh_context_indir(ctx)[i] = rxfh_dev.indir[i]; 1577 ctx->indir_configured = 1578 rxfh.indir_size && 1579 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE; 1580 } 1581 if (rxfh_dev.key) { 1582 memcpy(ethtool_rxfh_context_key(ctx), rxfh_dev.key, 1583 dev_key_size); 1584 ctx->key_configured = !!rxfh.key_size; 1585 } 1586 if (rxfh_dev.hfunc != ETH_RSS_HASH_NO_CHANGE) 1587 ctx->hfunc = rxfh_dev.hfunc; 1588 if (rxfh_dev.input_xfrm != RXH_XFRM_NO_CHANGE) 1589 ctx->input_xfrm = rxfh_dev.input_xfrm; 1590 } 1591 1592 out: 1593 if (locked) 1594 mutex_unlock(&dev->ethtool->rss_lock); 1595 kfree(rss_config); 1596 return ret; 1597 } 1598 1599 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1600 { 1601 struct ethtool_regs regs; 1602 const struct ethtool_ops *ops = dev->ethtool_ops; 1603 void *regbuf; 1604 int reglen, ret; 1605 1606 if (!ops->get_regs || !ops->get_regs_len) 1607 return -EOPNOTSUPP; 1608 1609 if (copy_from_user(®s, useraddr, sizeof(regs))) 1610 return -EFAULT; 1611 1612 reglen = ops->get_regs_len(dev); 1613 if (reglen <= 0) 1614 return reglen; 1615 1616 if (regs.len > reglen) 1617 regs.len = reglen; 1618 1619 regbuf = vzalloc(reglen); 1620 if (!regbuf) 1621 return -ENOMEM; 1622 1623 if (regs.len < reglen) 1624 reglen = regs.len; 1625 1626 ops->get_regs(dev, ®s, regbuf); 1627 1628 ret = -EFAULT; 1629 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1630 goto out; 1631 useraddr += offsetof(struct ethtool_regs, data); 1632 if (copy_to_user(useraddr, regbuf, reglen)) 1633 goto out; 1634 ret = 0; 1635 1636 out: 1637 vfree(regbuf); 1638 return ret; 1639 } 1640 1641 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1642 { 1643 struct ethtool_value reset; 1644 int ret; 1645 1646 if (!dev->ethtool_ops->reset) 1647 return -EOPNOTSUPP; 1648 1649 if (dev->ethtool->module_fw_flash_in_progress) 1650 return -EBUSY; 1651 1652 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1653 return -EFAULT; 1654 1655 ret = dev->ethtool_ops->reset(dev, &reset.data); 1656 if (ret) 1657 return ret; 1658 1659 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1660 return -EFAULT; 1661 return 0; 1662 } 1663 1664 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1665 { 1666 struct ethtool_wolinfo wol; 1667 1668 if (!dev->ethtool_ops->get_wol) 1669 return -EOPNOTSUPP; 1670 1671 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1672 wol.cmd = ETHTOOL_GWOL; 1673 dev->ethtool_ops->get_wol(dev, &wol); 1674 1675 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1676 return -EFAULT; 1677 return 0; 1678 } 1679 1680 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1681 { 1682 struct ethtool_wolinfo wol, cur_wol; 1683 int ret; 1684 1685 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol) 1686 return -EOPNOTSUPP; 1687 1688 memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo)); 1689 cur_wol.cmd = ETHTOOL_GWOL; 1690 dev->ethtool_ops->get_wol(dev, &cur_wol); 1691 1692 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1693 return -EFAULT; 1694 1695 if (wol.wolopts & ~cur_wol.supported) 1696 return -EINVAL; 1697 1698 if (wol.wolopts == cur_wol.wolopts && 1699 !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass))) 1700 return 0; 1701 1702 ret = dev->ethtool_ops->set_wol(dev, &wol); 1703 if (ret) 1704 return ret; 1705 1706 dev->ethtool->wol_enabled = !!wol.wolopts; 1707 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 1708 1709 return 0; 1710 } 1711 1712 static void eee_to_keee(struct ethtool_keee *keee, 1713 const struct ethtool_eee *eee) 1714 { 1715 memset(keee, 0, sizeof(*keee)); 1716 1717 keee->eee_enabled = eee->eee_enabled; 1718 keee->tx_lpi_enabled = eee->tx_lpi_enabled; 1719 keee->tx_lpi_timer = eee->tx_lpi_timer; 1720 1721 ethtool_convert_legacy_u32_to_link_mode(keee->advertised, 1722 eee->advertised); 1723 } 1724 1725 static void keee_to_eee(struct ethtool_eee *eee, 1726 const struct ethtool_keee *keee) 1727 { 1728 bool overflow; 1729 1730 memset(eee, 0, sizeof(*eee)); 1731 1732 eee->eee_active = keee->eee_active; 1733 eee->eee_enabled = keee->eee_enabled; 1734 eee->tx_lpi_enabled = keee->tx_lpi_enabled; 1735 eee->tx_lpi_timer = keee->tx_lpi_timer; 1736 1737 overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported, 1738 keee->supported); 1739 ethtool_convert_link_mode_to_legacy_u32(&eee->advertised, 1740 keee->advertised); 1741 ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised, 1742 keee->lp_advertised); 1743 if (overflow) 1744 pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n"); 1745 } 1746 1747 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1748 { 1749 struct ethtool_keee keee; 1750 struct ethtool_eee eee; 1751 int rc; 1752 1753 if (!dev->ethtool_ops->get_eee) 1754 return -EOPNOTSUPP; 1755 1756 memset(&keee, 0, sizeof(keee)); 1757 rc = dev->ethtool_ops->get_eee(dev, &keee); 1758 if (rc) 1759 return rc; 1760 1761 keee_to_eee(&eee, &keee); 1762 if (copy_to_user(useraddr, &eee, sizeof(eee))) 1763 return -EFAULT; 1764 1765 return 0; 1766 } 1767 1768 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1769 { 1770 struct ethtool_keee keee; 1771 struct ethtool_eee eee; 1772 int ret; 1773 1774 if (!dev->ethtool_ops->set_eee) 1775 return -EOPNOTSUPP; 1776 1777 if (copy_from_user(&eee, useraddr, sizeof(eee))) 1778 return -EFAULT; 1779 1780 eee_to_keee(&keee, &eee); 1781 ret = dev->ethtool_ops->set_eee(dev, &keee); 1782 if (!ret) 1783 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL); 1784 return ret; 1785 } 1786 1787 static int ethtool_nway_reset(struct net_device *dev) 1788 { 1789 if (!dev->ethtool_ops->nway_reset) 1790 return -EOPNOTSUPP; 1791 1792 return dev->ethtool_ops->nway_reset(dev); 1793 } 1794 1795 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1796 { 1797 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1798 int link = __ethtool_get_link(dev); 1799 1800 if (link < 0) 1801 return link; 1802 1803 edata.data = link; 1804 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1805 return -EFAULT; 1806 return 0; 1807 } 1808 1809 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1810 int (*getter)(struct net_device *, 1811 struct ethtool_eeprom *, u8 *), 1812 u32 total_len) 1813 { 1814 struct ethtool_eeprom eeprom; 1815 void __user *userbuf = useraddr + sizeof(eeprom); 1816 u32 bytes_remaining; 1817 u8 *data; 1818 int ret = 0; 1819 1820 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1821 return -EFAULT; 1822 1823 /* Check for wrap and zero */ 1824 if (eeprom.offset + eeprom.len <= eeprom.offset) 1825 return -EINVAL; 1826 1827 /* Check for exceeding total eeprom len */ 1828 if (eeprom.offset + eeprom.len > total_len) 1829 return -EINVAL; 1830 1831 data = kzalloc(PAGE_SIZE, GFP_USER); 1832 if (!data) 1833 return -ENOMEM; 1834 1835 bytes_remaining = eeprom.len; 1836 while (bytes_remaining > 0) { 1837 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1838 1839 ret = getter(dev, &eeprom, data); 1840 if (ret) 1841 break; 1842 if (!eeprom.len) { 1843 ret = -EIO; 1844 break; 1845 } 1846 if (copy_to_user(userbuf, data, eeprom.len)) { 1847 ret = -EFAULT; 1848 break; 1849 } 1850 userbuf += eeprom.len; 1851 eeprom.offset += eeprom.len; 1852 bytes_remaining -= eeprom.len; 1853 } 1854 1855 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1856 eeprom.offset -= eeprom.len; 1857 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1858 ret = -EFAULT; 1859 1860 kfree(data); 1861 return ret; 1862 } 1863 1864 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1865 { 1866 const struct ethtool_ops *ops = dev->ethtool_ops; 1867 1868 if (!ops->get_eeprom || !ops->get_eeprom_len || 1869 !ops->get_eeprom_len(dev)) 1870 return -EOPNOTSUPP; 1871 1872 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1873 ops->get_eeprom_len(dev)); 1874 } 1875 1876 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1877 { 1878 struct ethtool_eeprom eeprom; 1879 const struct ethtool_ops *ops = dev->ethtool_ops; 1880 void __user *userbuf = useraddr + sizeof(eeprom); 1881 u32 bytes_remaining; 1882 u8 *data; 1883 int ret = 0; 1884 1885 if (!ops->set_eeprom || !ops->get_eeprom_len || 1886 !ops->get_eeprom_len(dev)) 1887 return -EOPNOTSUPP; 1888 1889 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1890 return -EFAULT; 1891 1892 /* Check for wrap and zero */ 1893 if (eeprom.offset + eeprom.len <= eeprom.offset) 1894 return -EINVAL; 1895 1896 /* Check for exceeding total eeprom len */ 1897 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1898 return -EINVAL; 1899 1900 data = kzalloc(PAGE_SIZE, GFP_USER); 1901 if (!data) 1902 return -ENOMEM; 1903 1904 bytes_remaining = eeprom.len; 1905 while (bytes_remaining > 0) { 1906 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1907 1908 if (copy_from_user(data, userbuf, eeprom.len)) { 1909 ret = -EFAULT; 1910 break; 1911 } 1912 ret = ops->set_eeprom(dev, &eeprom, data); 1913 if (ret) 1914 break; 1915 userbuf += eeprom.len; 1916 eeprom.offset += eeprom.len; 1917 bytes_remaining -= eeprom.len; 1918 } 1919 1920 kfree(data); 1921 return ret; 1922 } 1923 1924 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1925 void __user *useraddr) 1926 { 1927 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1928 struct kernel_ethtool_coalesce kernel_coalesce = {}; 1929 int ret; 1930 1931 if (!dev->ethtool_ops->get_coalesce) 1932 return -EOPNOTSUPP; 1933 1934 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce, 1935 NULL); 1936 if (ret) 1937 return ret; 1938 1939 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1940 return -EFAULT; 1941 return 0; 1942 } 1943 1944 static bool 1945 ethtool_set_coalesce_supported(struct net_device *dev, 1946 struct ethtool_coalesce *coalesce) 1947 { 1948 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1949 u32 nonzero_params = 0; 1950 1951 if (coalesce->rx_coalesce_usecs) 1952 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1953 if (coalesce->rx_max_coalesced_frames) 1954 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1955 if (coalesce->rx_coalesce_usecs_irq) 1956 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1957 if (coalesce->rx_max_coalesced_frames_irq) 1958 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1959 if (coalesce->tx_coalesce_usecs) 1960 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1961 if (coalesce->tx_max_coalesced_frames) 1962 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1963 if (coalesce->tx_coalesce_usecs_irq) 1964 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1965 if (coalesce->tx_max_coalesced_frames_irq) 1966 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1967 if (coalesce->stats_block_coalesce_usecs) 1968 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1969 if (coalesce->use_adaptive_rx_coalesce) 1970 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1971 if (coalesce->use_adaptive_tx_coalesce) 1972 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1973 if (coalesce->pkt_rate_low) 1974 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1975 if (coalesce->rx_coalesce_usecs_low) 1976 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1977 if (coalesce->rx_max_coalesced_frames_low) 1978 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1979 if (coalesce->tx_coalesce_usecs_low) 1980 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1981 if (coalesce->tx_max_coalesced_frames_low) 1982 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1983 if (coalesce->pkt_rate_high) 1984 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1985 if (coalesce->rx_coalesce_usecs_high) 1986 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1987 if (coalesce->rx_max_coalesced_frames_high) 1988 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1989 if (coalesce->tx_coalesce_usecs_high) 1990 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1991 if (coalesce->tx_max_coalesced_frames_high) 1992 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1993 if (coalesce->rate_sample_interval) 1994 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1995 1996 return (supported_params & nonzero_params) == nonzero_params; 1997 } 1998 1999 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 2000 void __user *useraddr) 2001 { 2002 struct kernel_ethtool_coalesce kernel_coalesce = {}; 2003 struct ethtool_coalesce coalesce; 2004 int ret; 2005 2006 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce) 2007 return -EOPNOTSUPP; 2008 2009 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce, 2010 NULL); 2011 if (ret) 2012 return ret; 2013 2014 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 2015 return -EFAULT; 2016 2017 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 2018 return -EOPNOTSUPP; 2019 2020 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce, 2021 NULL); 2022 if (!ret) 2023 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); 2024 return ret; 2025 } 2026 2027 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 2028 { 2029 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 2030 struct kernel_ethtool_ringparam kernel_ringparam = {}; 2031 2032 if (!dev->ethtool_ops->get_ringparam) 2033 return -EOPNOTSUPP; 2034 2035 dev->ethtool_ops->get_ringparam(dev, &ringparam, 2036 &kernel_ringparam, NULL); 2037 2038 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 2039 return -EFAULT; 2040 return 0; 2041 } 2042 2043 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 2044 { 2045 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 2046 struct kernel_ethtool_ringparam kernel_ringparam; 2047 int ret; 2048 2049 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 2050 return -EOPNOTSUPP; 2051 2052 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 2053 return -EFAULT; 2054 2055 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL); 2056 2057 /* ensure new ring parameters are within the maximums */ 2058 if (ringparam.rx_pending > max.rx_max_pending || 2059 ringparam.rx_mini_pending > max.rx_mini_max_pending || 2060 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 2061 ringparam.tx_pending > max.tx_max_pending) 2062 return -EINVAL; 2063 2064 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, 2065 &kernel_ringparam, NULL); 2066 if (!ret) 2067 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 2068 return ret; 2069 } 2070 2071 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 2072 void __user *useraddr) 2073 { 2074 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 2075 2076 if (!dev->ethtool_ops->get_channels) 2077 return -EOPNOTSUPP; 2078 2079 dev->ethtool_ops->get_channels(dev, &channels); 2080 2081 if (copy_to_user(useraddr, &channels, sizeof(channels))) 2082 return -EFAULT; 2083 return 0; 2084 } 2085 2086 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 2087 void __user *useraddr) 2088 { 2089 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 2090 u16 from_channel, to_channel; 2091 unsigned int i; 2092 int ret; 2093 2094 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 2095 return -EOPNOTSUPP; 2096 2097 if (copy_from_user(&channels, useraddr, sizeof(channels))) 2098 return -EFAULT; 2099 2100 dev->ethtool_ops->get_channels(dev, &curr); 2101 2102 if (channels.rx_count == curr.rx_count && 2103 channels.tx_count == curr.tx_count && 2104 channels.combined_count == curr.combined_count && 2105 channels.other_count == curr.other_count) 2106 return 0; 2107 2108 /* ensure new counts are within the maximums */ 2109 if (channels.rx_count > curr.max_rx || 2110 channels.tx_count > curr.max_tx || 2111 channels.combined_count > curr.max_combined || 2112 channels.other_count > curr.max_other) 2113 return -EINVAL; 2114 2115 /* ensure there is at least one RX and one TX channel */ 2116 if (!channels.combined_count && 2117 (!channels.rx_count || !channels.tx_count)) 2118 return -EINVAL; 2119 2120 ret = ethtool_check_max_channel(dev, channels, NULL); 2121 if (ret) 2122 return ret; 2123 2124 /* Disabling channels, query zero-copy AF_XDP sockets */ 2125 from_channel = channels.combined_count + 2126 min(channels.rx_count, channels.tx_count); 2127 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 2128 for (i = from_channel; i < to_channel; i++) 2129 if (xsk_get_pool_from_qid(dev, i)) 2130 return -EINVAL; 2131 2132 ret = dev->ethtool_ops->set_channels(dev, &channels); 2133 if (!ret) 2134 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 2135 return ret; 2136 } 2137 2138 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 2139 { 2140 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 2141 2142 if (!dev->ethtool_ops->get_pauseparam) 2143 return -EOPNOTSUPP; 2144 2145 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 2146 2147 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 2148 return -EFAULT; 2149 return 0; 2150 } 2151 2152 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 2153 { 2154 struct ethtool_pauseparam pauseparam; 2155 int ret; 2156 2157 if (!dev->ethtool_ops->set_pauseparam) 2158 return -EOPNOTSUPP; 2159 2160 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 2161 return -EFAULT; 2162 2163 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 2164 if (!ret) 2165 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); 2166 return ret; 2167 } 2168 2169 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 2170 { 2171 struct ethtool_test test; 2172 const struct ethtool_ops *ops = dev->ethtool_ops; 2173 u64 *data; 2174 int ret, test_len; 2175 2176 if (!ops->self_test || !ops->get_sset_count) 2177 return -EOPNOTSUPP; 2178 2179 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 2180 if (test_len < 0) 2181 return test_len; 2182 WARN_ON(test_len == 0); 2183 2184 if (copy_from_user(&test, useraddr, sizeof(test))) 2185 return -EFAULT; 2186 2187 test.len = test_len; 2188 data = kcalloc(test_len, sizeof(u64), GFP_USER); 2189 if (!data) 2190 return -ENOMEM; 2191 2192 netif_testing_on(dev); 2193 ops->self_test(dev, &test, data); 2194 netif_testing_off(dev); 2195 2196 ret = -EFAULT; 2197 if (copy_to_user(useraddr, &test, sizeof(test))) 2198 goto out; 2199 useraddr += sizeof(test); 2200 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64)))) 2201 goto out; 2202 ret = 0; 2203 2204 out: 2205 kfree(data); 2206 return ret; 2207 } 2208 2209 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 2210 { 2211 struct ethtool_gstrings gstrings; 2212 u8 *data; 2213 int ret; 2214 2215 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 2216 return -EFAULT; 2217 2218 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 2219 if (ret < 0) 2220 return ret; 2221 if (ret > S32_MAX / ETH_GSTRING_LEN) 2222 return -ENOMEM; 2223 WARN_ON_ONCE(!ret); 2224 2225 gstrings.len = ret; 2226 2227 if (gstrings.len) { 2228 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 2229 if (!data) 2230 return -ENOMEM; 2231 2232 __ethtool_get_strings(dev, gstrings.string_set, data); 2233 } else { 2234 data = NULL; 2235 } 2236 2237 ret = -EFAULT; 2238 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 2239 goto out; 2240 useraddr += sizeof(gstrings); 2241 if (gstrings.len && 2242 copy_to_user(useraddr, data, 2243 array_size(gstrings.len, ETH_GSTRING_LEN))) 2244 goto out; 2245 ret = 0; 2246 2247 out: 2248 vfree(data); 2249 return ret; 2250 } 2251 2252 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...) 2253 { 2254 va_list args; 2255 2256 va_start(args, fmt); 2257 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args); 2258 va_end(args); 2259 2260 *data += ETH_GSTRING_LEN; 2261 } 2262 EXPORT_SYMBOL(ethtool_sprintf); 2263 2264 void ethtool_puts(u8 **data, const char *str) 2265 { 2266 strscpy(*data, str, ETH_GSTRING_LEN); 2267 *data += ETH_GSTRING_LEN; 2268 } 2269 EXPORT_SYMBOL(ethtool_puts); 2270 2271 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 2272 { 2273 struct ethtool_value id; 2274 static bool busy; 2275 const struct ethtool_ops *ops = dev->ethtool_ops; 2276 netdevice_tracker dev_tracker; 2277 int rc; 2278 2279 if (!ops->set_phys_id) 2280 return -EOPNOTSUPP; 2281 2282 if (busy) 2283 return -EBUSY; 2284 2285 if (copy_from_user(&id, useraddr, sizeof(id))) 2286 return -EFAULT; 2287 2288 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 2289 if (rc < 0) 2290 return rc; 2291 2292 /* Drop the RTNL lock while waiting, but prevent reentry or 2293 * removal of the device. 2294 */ 2295 busy = true; 2296 netdev_hold(dev, &dev_tracker, GFP_KERNEL); 2297 rtnl_unlock(); 2298 2299 if (rc == 0) { 2300 /* Driver will handle this itself */ 2301 schedule_timeout_interruptible( 2302 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 2303 } else { 2304 /* Driver expects to be called at twice the frequency in rc */ 2305 int n = rc * 2, interval = HZ / n; 2306 u64 count = mul_u32_u32(n, id.data); 2307 u64 i = 0; 2308 2309 do { 2310 rtnl_lock(); 2311 rc = ops->set_phys_id(dev, 2312 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 2313 rtnl_unlock(); 2314 if (rc) 2315 break; 2316 schedule_timeout_interruptible(interval); 2317 } while (!signal_pending(current) && (!id.data || i < count)); 2318 } 2319 2320 rtnl_lock(); 2321 netdev_put(dev, &dev_tracker); 2322 busy = false; 2323 2324 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 2325 return rc; 2326 } 2327 2328 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 2329 { 2330 struct ethtool_stats stats; 2331 const struct ethtool_ops *ops = dev->ethtool_ops; 2332 u64 *data; 2333 int ret, n_stats; 2334 2335 if (!ops->get_ethtool_stats || !ops->get_sset_count) 2336 return -EOPNOTSUPP; 2337 2338 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 2339 if (n_stats < 0) 2340 return n_stats; 2341 if (n_stats > S32_MAX / sizeof(u64)) 2342 return -ENOMEM; 2343 WARN_ON_ONCE(!n_stats); 2344 if (copy_from_user(&stats, useraddr, sizeof(stats))) 2345 return -EFAULT; 2346 2347 stats.n_stats = n_stats; 2348 2349 if (n_stats) { 2350 data = vzalloc(array_size(n_stats, sizeof(u64))); 2351 if (!data) 2352 return -ENOMEM; 2353 ops->get_ethtool_stats(dev, &stats, data); 2354 } else { 2355 data = NULL; 2356 } 2357 2358 ret = -EFAULT; 2359 if (copy_to_user(useraddr, &stats, sizeof(stats))) 2360 goto out; 2361 useraddr += sizeof(stats); 2362 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64)))) 2363 goto out; 2364 ret = 0; 2365 2366 out: 2367 vfree(data); 2368 return ret; 2369 } 2370 2371 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data) 2372 { 2373 if (n_stats < 0) 2374 return n_stats; 2375 if (n_stats > S32_MAX / sizeof(u64)) 2376 return -ENOMEM; 2377 if (WARN_ON_ONCE(!n_stats)) 2378 return -EOPNOTSUPP; 2379 2380 *data = vzalloc(array_size(n_stats, sizeof(u64))); 2381 if (!*data) 2382 return -ENOMEM; 2383 2384 return 0; 2385 } 2386 2387 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev, 2388 struct ethtool_stats *stats, 2389 u64 **data) 2390 { 2391 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 2392 int n_stats, ret; 2393 2394 if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats) 2395 return -EOPNOTSUPP; 2396 2397 n_stats = phy_ops->get_sset_count(phydev); 2398 2399 ret = ethtool_vzalloc_stats_array(n_stats, data); 2400 if (ret) 2401 return ret; 2402 2403 stats->n_stats = n_stats; 2404 return phy_ops->get_stats(phydev, stats, *data); 2405 } 2406 2407 static int ethtool_get_phy_stats_ethtool(struct net_device *dev, 2408 struct ethtool_stats *stats, 2409 u64 **data) 2410 { 2411 const struct ethtool_ops *ops = dev->ethtool_ops; 2412 int n_stats, ret; 2413 2414 if (!ops || !ops->get_sset_count || !ops->get_ethtool_phy_stats) 2415 return -EOPNOTSUPP; 2416 2417 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 2418 2419 ret = ethtool_vzalloc_stats_array(n_stats, data); 2420 if (ret) 2421 return ret; 2422 2423 stats->n_stats = n_stats; 2424 ops->get_ethtool_phy_stats(dev, stats, *data); 2425 2426 return 0; 2427 } 2428 2429 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 2430 { 2431 struct phy_device *phydev = dev->phydev; 2432 struct ethtool_stats stats; 2433 u64 *data = NULL; 2434 int ret = -EOPNOTSUPP; 2435 2436 if (copy_from_user(&stats, useraddr, sizeof(stats))) 2437 return -EFAULT; 2438 2439 if (phydev) 2440 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data); 2441 2442 if (ret == -EOPNOTSUPP) 2443 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data); 2444 2445 if (ret) 2446 goto out; 2447 2448 if (copy_to_user(useraddr, &stats, sizeof(stats))) { 2449 ret = -EFAULT; 2450 goto out; 2451 } 2452 2453 useraddr += sizeof(stats); 2454 if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64)))) 2455 ret = -EFAULT; 2456 2457 out: 2458 vfree(data); 2459 return ret; 2460 } 2461 2462 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 2463 { 2464 struct ethtool_perm_addr epaddr; 2465 2466 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 2467 return -EFAULT; 2468 2469 if (epaddr.size < dev->addr_len) 2470 return -ETOOSMALL; 2471 epaddr.size = dev->addr_len; 2472 2473 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 2474 return -EFAULT; 2475 useraddr += sizeof(epaddr); 2476 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 2477 return -EFAULT; 2478 return 0; 2479 } 2480 2481 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 2482 u32 cmd, u32 (*actor)(struct net_device *)) 2483 { 2484 struct ethtool_value edata = { .cmd = cmd }; 2485 2486 if (!actor) 2487 return -EOPNOTSUPP; 2488 2489 edata.data = actor(dev); 2490 2491 if (copy_to_user(useraddr, &edata, sizeof(edata))) 2492 return -EFAULT; 2493 return 0; 2494 } 2495 2496 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 2497 void (*actor)(struct net_device *, u32)) 2498 { 2499 struct ethtool_value edata; 2500 2501 if (!actor) 2502 return -EOPNOTSUPP; 2503 2504 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2505 return -EFAULT; 2506 2507 actor(dev, edata.data); 2508 return 0; 2509 } 2510 2511 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2512 int (*actor)(struct net_device *, u32)) 2513 { 2514 struct ethtool_value edata; 2515 2516 if (!actor) 2517 return -EOPNOTSUPP; 2518 2519 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2520 return -EFAULT; 2521 2522 return actor(dev, edata.data); 2523 } 2524 2525 static int 2526 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req) 2527 { 2528 if (!dev->ethtool_ops->flash_device) { 2529 req->devlink = netdev_to_devlink_get(dev); 2530 return 0; 2531 } 2532 2533 return dev->ethtool_ops->flash_device(dev, &req->efl); 2534 } 2535 2536 static int ethtool_set_dump(struct net_device *dev, 2537 void __user *useraddr) 2538 { 2539 struct ethtool_dump dump; 2540 2541 if (!dev->ethtool_ops->set_dump) 2542 return -EOPNOTSUPP; 2543 2544 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2545 return -EFAULT; 2546 2547 return dev->ethtool_ops->set_dump(dev, &dump); 2548 } 2549 2550 static int ethtool_get_dump_flag(struct net_device *dev, 2551 void __user *useraddr) 2552 { 2553 int ret; 2554 struct ethtool_dump dump; 2555 const struct ethtool_ops *ops = dev->ethtool_ops; 2556 2557 if (!ops->get_dump_flag) 2558 return -EOPNOTSUPP; 2559 2560 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2561 return -EFAULT; 2562 2563 ret = ops->get_dump_flag(dev, &dump); 2564 if (ret) 2565 return ret; 2566 2567 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2568 return -EFAULT; 2569 return 0; 2570 } 2571 2572 static int ethtool_get_dump_data(struct net_device *dev, 2573 void __user *useraddr) 2574 { 2575 int ret; 2576 __u32 len; 2577 struct ethtool_dump dump, tmp; 2578 const struct ethtool_ops *ops = dev->ethtool_ops; 2579 void *data = NULL; 2580 2581 if (!ops->get_dump_data || !ops->get_dump_flag) 2582 return -EOPNOTSUPP; 2583 2584 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2585 return -EFAULT; 2586 2587 memset(&tmp, 0, sizeof(tmp)); 2588 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2589 ret = ops->get_dump_flag(dev, &tmp); 2590 if (ret) 2591 return ret; 2592 2593 len = min(tmp.len, dump.len); 2594 if (!len) 2595 return -EFAULT; 2596 2597 /* Don't ever let the driver think there's more space available 2598 * than it requested with .get_dump_flag(). 2599 */ 2600 dump.len = len; 2601 2602 /* Always allocate enough space to hold the whole thing so that the 2603 * driver does not need to check the length and bother with partial 2604 * dumping. 2605 */ 2606 data = vzalloc(tmp.len); 2607 if (!data) 2608 return -ENOMEM; 2609 ret = ops->get_dump_data(dev, &dump, data); 2610 if (ret) 2611 goto out; 2612 2613 /* There are two sane possibilities: 2614 * 1. The driver's .get_dump_data() does not touch dump.len. 2615 * 2. Or it may set dump.len to how much it really writes, which 2616 * should be tmp.len (or len if it can do a partial dump). 2617 * In any case respond to userspace with the actual length of data 2618 * it's receiving. 2619 */ 2620 WARN_ON(dump.len != len && dump.len != tmp.len); 2621 dump.len = len; 2622 2623 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2624 ret = -EFAULT; 2625 goto out; 2626 } 2627 useraddr += offsetof(struct ethtool_dump, data); 2628 if (copy_to_user(useraddr, data, len)) 2629 ret = -EFAULT; 2630 out: 2631 vfree(data); 2632 return ret; 2633 } 2634 2635 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2636 { 2637 struct kernel_ethtool_ts_info kernel_info; 2638 struct ethtool_ts_info info = {}; 2639 int err; 2640 2641 err = __ethtool_get_ts_info(dev, &kernel_info); 2642 if (err) 2643 return err; 2644 2645 info.cmd = kernel_info.cmd; 2646 info.so_timestamping = kernel_info.so_timestamping; 2647 info.phc_index = kernel_info.phc_index; 2648 info.tx_types = kernel_info.tx_types; 2649 info.rx_filters = kernel_info.rx_filters; 2650 2651 if (copy_to_user(useraddr, &info, sizeof(info))) 2652 return -EFAULT; 2653 2654 return 0; 2655 } 2656 2657 int ethtool_get_module_info_call(struct net_device *dev, 2658 struct ethtool_modinfo *modinfo) 2659 { 2660 const struct ethtool_ops *ops = dev->ethtool_ops; 2661 struct phy_device *phydev = dev->phydev; 2662 2663 if (dev->ethtool->module_fw_flash_in_progress) 2664 return -EBUSY; 2665 2666 if (dev->sfp_bus) 2667 return sfp_get_module_info(dev->sfp_bus, modinfo); 2668 2669 if (phydev && phydev->drv && phydev->drv->module_info) 2670 return phydev->drv->module_info(phydev, modinfo); 2671 2672 if (ops->get_module_info) 2673 return ops->get_module_info(dev, modinfo); 2674 2675 return -EOPNOTSUPP; 2676 } 2677 2678 static int ethtool_get_module_info(struct net_device *dev, 2679 void __user *useraddr) 2680 { 2681 int ret; 2682 struct ethtool_modinfo modinfo; 2683 2684 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2685 return -EFAULT; 2686 2687 ret = ethtool_get_module_info_call(dev, &modinfo); 2688 if (ret) 2689 return ret; 2690 2691 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2692 return -EFAULT; 2693 2694 return 0; 2695 } 2696 2697 int ethtool_get_module_eeprom_call(struct net_device *dev, 2698 struct ethtool_eeprom *ee, u8 *data) 2699 { 2700 const struct ethtool_ops *ops = dev->ethtool_ops; 2701 struct phy_device *phydev = dev->phydev; 2702 2703 if (dev->ethtool->module_fw_flash_in_progress) 2704 return -EBUSY; 2705 2706 if (dev->sfp_bus) 2707 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2708 2709 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2710 return phydev->drv->module_eeprom(phydev, ee, data); 2711 2712 if (ops->get_module_eeprom) 2713 return ops->get_module_eeprom(dev, ee, data); 2714 2715 return -EOPNOTSUPP; 2716 } 2717 2718 static int ethtool_get_module_eeprom(struct net_device *dev, 2719 void __user *useraddr) 2720 { 2721 int ret; 2722 struct ethtool_modinfo modinfo; 2723 2724 ret = ethtool_get_module_info_call(dev, &modinfo); 2725 if (ret) 2726 return ret; 2727 2728 return ethtool_get_any_eeprom(dev, useraddr, 2729 ethtool_get_module_eeprom_call, 2730 modinfo.eeprom_len); 2731 } 2732 2733 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2734 { 2735 switch (tuna->id) { 2736 case ETHTOOL_RX_COPYBREAK: 2737 case ETHTOOL_TX_COPYBREAK: 2738 case ETHTOOL_TX_COPYBREAK_BUF_SIZE: 2739 if (tuna->len != sizeof(u32) || 2740 tuna->type_id != ETHTOOL_TUNABLE_U32) 2741 return -EINVAL; 2742 break; 2743 case ETHTOOL_PFC_PREVENTION_TOUT: 2744 if (tuna->len != sizeof(u16) || 2745 tuna->type_id != ETHTOOL_TUNABLE_U16) 2746 return -EINVAL; 2747 break; 2748 default: 2749 return -EINVAL; 2750 } 2751 2752 return 0; 2753 } 2754 2755 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2756 { 2757 int ret; 2758 struct ethtool_tunable tuna; 2759 const struct ethtool_ops *ops = dev->ethtool_ops; 2760 void *data; 2761 2762 if (!ops->get_tunable) 2763 return -EOPNOTSUPP; 2764 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2765 return -EFAULT; 2766 ret = ethtool_tunable_valid(&tuna); 2767 if (ret) 2768 return ret; 2769 data = kzalloc(tuna.len, GFP_USER); 2770 if (!data) 2771 return -ENOMEM; 2772 ret = ops->get_tunable(dev, &tuna, data); 2773 if (ret) 2774 goto out; 2775 useraddr += sizeof(tuna); 2776 ret = -EFAULT; 2777 if (copy_to_user(useraddr, data, tuna.len)) 2778 goto out; 2779 ret = 0; 2780 2781 out: 2782 kfree(data); 2783 return ret; 2784 } 2785 2786 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2787 { 2788 int ret; 2789 struct ethtool_tunable tuna; 2790 const struct ethtool_ops *ops = dev->ethtool_ops; 2791 void *data; 2792 2793 if (!ops->set_tunable) 2794 return -EOPNOTSUPP; 2795 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2796 return -EFAULT; 2797 ret = ethtool_tunable_valid(&tuna); 2798 if (ret) 2799 return ret; 2800 useraddr += sizeof(tuna); 2801 data = memdup_user(useraddr, tuna.len); 2802 if (IS_ERR(data)) 2803 return PTR_ERR(data); 2804 ret = ops->set_tunable(dev, &tuna, data); 2805 2806 kfree(data); 2807 return ret; 2808 } 2809 2810 static noinline_for_stack int 2811 ethtool_get_per_queue_coalesce(struct net_device *dev, 2812 void __user *useraddr, 2813 struct ethtool_per_queue_op *per_queue_opt) 2814 { 2815 u32 bit; 2816 int ret; 2817 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2818 2819 if (!dev->ethtool_ops->get_per_queue_coalesce) 2820 return -EOPNOTSUPP; 2821 2822 useraddr += sizeof(*per_queue_opt); 2823 2824 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2825 MAX_NUM_QUEUE); 2826 2827 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2828 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2829 2830 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2831 if (ret != 0) 2832 return ret; 2833 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2834 return -EFAULT; 2835 useraddr += sizeof(coalesce); 2836 } 2837 2838 return 0; 2839 } 2840 2841 static noinline_for_stack int 2842 ethtool_set_per_queue_coalesce(struct net_device *dev, 2843 void __user *useraddr, 2844 struct ethtool_per_queue_op *per_queue_opt) 2845 { 2846 u32 bit; 2847 int i, ret = 0; 2848 int n_queue; 2849 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2850 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2851 2852 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2853 (!dev->ethtool_ops->get_per_queue_coalesce)) 2854 return -EOPNOTSUPP; 2855 2856 useraddr += sizeof(*per_queue_opt); 2857 2858 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2859 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2860 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2861 if (!backup) 2862 return -ENOMEM; 2863 2864 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2865 struct ethtool_coalesce coalesce; 2866 2867 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2868 if (ret != 0) 2869 goto roll_back; 2870 2871 tmp++; 2872 2873 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2874 ret = -EFAULT; 2875 goto roll_back; 2876 } 2877 2878 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2879 ret = -EOPNOTSUPP; 2880 goto roll_back; 2881 } 2882 2883 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2884 if (ret != 0) 2885 goto roll_back; 2886 2887 useraddr += sizeof(coalesce); 2888 } 2889 2890 roll_back: 2891 if (ret != 0) { 2892 tmp = backup; 2893 for_each_set_bit(i, queue_mask, bit) { 2894 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2895 tmp++; 2896 } 2897 } 2898 kfree(backup); 2899 2900 return ret; 2901 } 2902 2903 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2904 void __user *useraddr, u32 sub_cmd) 2905 { 2906 struct ethtool_per_queue_op per_queue_opt; 2907 2908 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2909 return -EFAULT; 2910 2911 if (per_queue_opt.sub_command != sub_cmd) 2912 return -EINVAL; 2913 2914 switch (per_queue_opt.sub_command) { 2915 case ETHTOOL_GCOALESCE: 2916 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2917 case ETHTOOL_SCOALESCE: 2918 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2919 default: 2920 return -EOPNOTSUPP; 2921 } 2922 } 2923 2924 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2925 { 2926 switch (tuna->id) { 2927 case ETHTOOL_PHY_DOWNSHIFT: 2928 case ETHTOOL_PHY_FAST_LINK_DOWN: 2929 if (tuna->len != sizeof(u8) || 2930 tuna->type_id != ETHTOOL_TUNABLE_U8) 2931 return -EINVAL; 2932 break; 2933 case ETHTOOL_PHY_EDPD: 2934 if (tuna->len != sizeof(u16) || 2935 tuna->type_id != ETHTOOL_TUNABLE_U16) 2936 return -EINVAL; 2937 break; 2938 default: 2939 return -EINVAL; 2940 } 2941 2942 return 0; 2943 } 2944 2945 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2946 { 2947 struct phy_device *phydev = dev->phydev; 2948 struct ethtool_tunable tuna; 2949 bool phy_drv_tunable; 2950 void *data; 2951 int ret; 2952 2953 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable; 2954 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable) 2955 return -EOPNOTSUPP; 2956 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2957 return -EFAULT; 2958 ret = ethtool_phy_tunable_valid(&tuna); 2959 if (ret) 2960 return ret; 2961 data = kzalloc(tuna.len, GFP_USER); 2962 if (!data) 2963 return -ENOMEM; 2964 if (phy_drv_tunable) { 2965 mutex_lock(&phydev->lock); 2966 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2967 mutex_unlock(&phydev->lock); 2968 } else { 2969 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data); 2970 } 2971 if (ret) 2972 goto out; 2973 useraddr += sizeof(tuna); 2974 ret = -EFAULT; 2975 if (copy_to_user(useraddr, data, tuna.len)) 2976 goto out; 2977 ret = 0; 2978 2979 out: 2980 kfree(data); 2981 return ret; 2982 } 2983 2984 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2985 { 2986 struct phy_device *phydev = dev->phydev; 2987 struct ethtool_tunable tuna; 2988 bool phy_drv_tunable; 2989 void *data; 2990 int ret; 2991 2992 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable; 2993 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable) 2994 return -EOPNOTSUPP; 2995 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2996 return -EFAULT; 2997 ret = ethtool_phy_tunable_valid(&tuna); 2998 if (ret) 2999 return ret; 3000 useraddr += sizeof(tuna); 3001 data = memdup_user(useraddr, tuna.len); 3002 if (IS_ERR(data)) 3003 return PTR_ERR(data); 3004 if (phy_drv_tunable) { 3005 mutex_lock(&phydev->lock); 3006 ret = phydev->drv->set_tunable(phydev, &tuna, data); 3007 mutex_unlock(&phydev->lock); 3008 } else { 3009 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data); 3010 } 3011 3012 kfree(data); 3013 return ret; 3014 } 3015 3016 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 3017 { 3018 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 3019 int rc; 3020 3021 if (!dev->ethtool_ops->get_fecparam) 3022 return -EOPNOTSUPP; 3023 3024 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 3025 if (rc) 3026 return rc; 3027 3028 if (WARN_ON_ONCE(fecparam.reserved)) 3029 fecparam.reserved = 0; 3030 3031 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 3032 return -EFAULT; 3033 return 0; 3034 } 3035 3036 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 3037 { 3038 struct ethtool_fecparam fecparam; 3039 3040 if (!dev->ethtool_ops->set_fecparam) 3041 return -EOPNOTSUPP; 3042 3043 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 3044 return -EFAULT; 3045 3046 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE) 3047 return -EINVAL; 3048 3049 fecparam.active_fec = 0; 3050 fecparam.reserved = 0; 3051 3052 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 3053 } 3054 3055 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 3056 3057 static int 3058 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr, 3059 u32 ethcmd, struct ethtool_devlink_compat *devlink_state) 3060 { 3061 struct net_device *dev; 3062 u32 sub_cmd; 3063 int rc; 3064 netdev_features_t old_features; 3065 3066 dev = __dev_get_by_name(net, ifr->ifr_name); 3067 if (!dev) 3068 return -ENODEV; 3069 3070 if (ethcmd == ETHTOOL_PERQUEUE) { 3071 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 3072 return -EFAULT; 3073 } else { 3074 sub_cmd = ethcmd; 3075 } 3076 /* Allow some commands to be done by anyone */ 3077 switch (sub_cmd) { 3078 case ETHTOOL_GSET: 3079 case ETHTOOL_GDRVINFO: 3080 case ETHTOOL_GMSGLVL: 3081 case ETHTOOL_GLINK: 3082 case ETHTOOL_GCOALESCE: 3083 case ETHTOOL_GRINGPARAM: 3084 case ETHTOOL_GPAUSEPARAM: 3085 case ETHTOOL_GRXCSUM: 3086 case ETHTOOL_GTXCSUM: 3087 case ETHTOOL_GSG: 3088 case ETHTOOL_GSSET_INFO: 3089 case ETHTOOL_GSTRINGS: 3090 case ETHTOOL_GSTATS: 3091 case ETHTOOL_GPHYSTATS: 3092 case ETHTOOL_GTSO: 3093 case ETHTOOL_GPERMADDR: 3094 case ETHTOOL_GUFO: 3095 case ETHTOOL_GGSO: 3096 case ETHTOOL_GGRO: 3097 case ETHTOOL_GFLAGS: 3098 case ETHTOOL_GPFLAGS: 3099 case ETHTOOL_GRXFH: 3100 case ETHTOOL_GRXRINGS: 3101 case ETHTOOL_GRXCLSRLCNT: 3102 case ETHTOOL_GRXCLSRULE: 3103 case ETHTOOL_GRXCLSRLALL: 3104 case ETHTOOL_GRXFHINDIR: 3105 case ETHTOOL_GRSSH: 3106 case ETHTOOL_GFEATURES: 3107 case ETHTOOL_GCHANNELS: 3108 case ETHTOOL_GET_TS_INFO: 3109 case ETHTOOL_GEEE: 3110 case ETHTOOL_GTUNABLE: 3111 case ETHTOOL_PHY_GTUNABLE: 3112 case ETHTOOL_GLINKSETTINGS: 3113 case ETHTOOL_GFECPARAM: 3114 break; 3115 default: 3116 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 3117 return -EPERM; 3118 } 3119 3120 if (dev->dev.parent) 3121 pm_runtime_get_sync(dev->dev.parent); 3122 3123 if (!netif_device_present(dev)) { 3124 rc = -ENODEV; 3125 goto out; 3126 } 3127 3128 if (dev->ethtool_ops->begin) { 3129 rc = dev->ethtool_ops->begin(dev); 3130 if (rc < 0) 3131 goto out; 3132 } 3133 old_features = dev->features; 3134 3135 switch (ethcmd) { 3136 case ETHTOOL_GSET: 3137 rc = ethtool_get_settings(dev, useraddr); 3138 break; 3139 case ETHTOOL_SSET: 3140 rc = ethtool_set_settings(dev, useraddr); 3141 break; 3142 case ETHTOOL_GDRVINFO: 3143 rc = ethtool_get_drvinfo(dev, devlink_state); 3144 break; 3145 case ETHTOOL_GREGS: 3146 rc = ethtool_get_regs(dev, useraddr); 3147 break; 3148 case ETHTOOL_GWOL: 3149 rc = ethtool_get_wol(dev, useraddr); 3150 break; 3151 case ETHTOOL_SWOL: 3152 rc = ethtool_set_wol(dev, useraddr); 3153 break; 3154 case ETHTOOL_GMSGLVL: 3155 rc = ethtool_get_value(dev, useraddr, ethcmd, 3156 dev->ethtool_ops->get_msglevel); 3157 break; 3158 case ETHTOOL_SMSGLVL: 3159 rc = ethtool_set_value_void(dev, useraddr, 3160 dev->ethtool_ops->set_msglevel); 3161 if (!rc) 3162 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 3163 break; 3164 case ETHTOOL_GEEE: 3165 rc = ethtool_get_eee(dev, useraddr); 3166 break; 3167 case ETHTOOL_SEEE: 3168 rc = ethtool_set_eee(dev, useraddr); 3169 break; 3170 case ETHTOOL_NWAY_RST: 3171 rc = ethtool_nway_reset(dev); 3172 break; 3173 case ETHTOOL_GLINK: 3174 rc = ethtool_get_link(dev, useraddr); 3175 break; 3176 case ETHTOOL_GEEPROM: 3177 rc = ethtool_get_eeprom(dev, useraddr); 3178 break; 3179 case ETHTOOL_SEEPROM: 3180 rc = ethtool_set_eeprom(dev, useraddr); 3181 break; 3182 case ETHTOOL_GCOALESCE: 3183 rc = ethtool_get_coalesce(dev, useraddr); 3184 break; 3185 case ETHTOOL_SCOALESCE: 3186 rc = ethtool_set_coalesce(dev, useraddr); 3187 break; 3188 case ETHTOOL_GRINGPARAM: 3189 rc = ethtool_get_ringparam(dev, useraddr); 3190 break; 3191 case ETHTOOL_SRINGPARAM: 3192 rc = ethtool_set_ringparam(dev, useraddr); 3193 break; 3194 case ETHTOOL_GPAUSEPARAM: 3195 rc = ethtool_get_pauseparam(dev, useraddr); 3196 break; 3197 case ETHTOOL_SPAUSEPARAM: 3198 rc = ethtool_set_pauseparam(dev, useraddr); 3199 break; 3200 case ETHTOOL_TEST: 3201 rc = ethtool_self_test(dev, useraddr); 3202 break; 3203 case ETHTOOL_GSTRINGS: 3204 rc = ethtool_get_strings(dev, useraddr); 3205 break; 3206 case ETHTOOL_PHYS_ID: 3207 rc = ethtool_phys_id(dev, useraddr); 3208 break; 3209 case ETHTOOL_GSTATS: 3210 rc = ethtool_get_stats(dev, useraddr); 3211 break; 3212 case ETHTOOL_GPERMADDR: 3213 rc = ethtool_get_perm_addr(dev, useraddr); 3214 break; 3215 case ETHTOOL_GFLAGS: 3216 rc = ethtool_get_value(dev, useraddr, ethcmd, 3217 __ethtool_get_flags); 3218 break; 3219 case ETHTOOL_SFLAGS: 3220 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 3221 break; 3222 case ETHTOOL_GPFLAGS: 3223 rc = ethtool_get_value(dev, useraddr, ethcmd, 3224 dev->ethtool_ops->get_priv_flags); 3225 if (!rc) 3226 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 3227 break; 3228 case ETHTOOL_SPFLAGS: 3229 rc = ethtool_set_value(dev, useraddr, 3230 dev->ethtool_ops->set_priv_flags); 3231 break; 3232 case ETHTOOL_GRXFH: 3233 case ETHTOOL_GRXRINGS: 3234 case ETHTOOL_GRXCLSRLCNT: 3235 case ETHTOOL_GRXCLSRULE: 3236 case ETHTOOL_GRXCLSRLALL: 3237 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 3238 break; 3239 case ETHTOOL_SRXFH: 3240 case ETHTOOL_SRXCLSRLDEL: 3241 case ETHTOOL_SRXCLSRLINS: 3242 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 3243 break; 3244 case ETHTOOL_FLASHDEV: 3245 rc = ethtool_flash_device(dev, devlink_state); 3246 break; 3247 case ETHTOOL_RESET: 3248 rc = ethtool_reset(dev, useraddr); 3249 break; 3250 case ETHTOOL_GSSET_INFO: 3251 rc = ethtool_get_sset_info(dev, useraddr); 3252 break; 3253 case ETHTOOL_GRXFHINDIR: 3254 rc = ethtool_get_rxfh_indir(dev, useraddr); 3255 break; 3256 case ETHTOOL_SRXFHINDIR: 3257 rc = ethtool_set_rxfh_indir(dev, useraddr); 3258 break; 3259 case ETHTOOL_GRSSH: 3260 rc = ethtool_get_rxfh(dev, useraddr); 3261 break; 3262 case ETHTOOL_SRSSH: 3263 rc = ethtool_set_rxfh(dev, useraddr); 3264 break; 3265 case ETHTOOL_GFEATURES: 3266 rc = ethtool_get_features(dev, useraddr); 3267 break; 3268 case ETHTOOL_SFEATURES: 3269 rc = ethtool_set_features(dev, useraddr); 3270 break; 3271 case ETHTOOL_GTXCSUM: 3272 case ETHTOOL_GRXCSUM: 3273 case ETHTOOL_GSG: 3274 case ETHTOOL_GTSO: 3275 case ETHTOOL_GGSO: 3276 case ETHTOOL_GGRO: 3277 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 3278 break; 3279 case ETHTOOL_STXCSUM: 3280 case ETHTOOL_SRXCSUM: 3281 case ETHTOOL_SSG: 3282 case ETHTOOL_STSO: 3283 case ETHTOOL_SGSO: 3284 case ETHTOOL_SGRO: 3285 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 3286 break; 3287 case ETHTOOL_GCHANNELS: 3288 rc = ethtool_get_channels(dev, useraddr); 3289 break; 3290 case ETHTOOL_SCHANNELS: 3291 rc = ethtool_set_channels(dev, useraddr); 3292 break; 3293 case ETHTOOL_SET_DUMP: 3294 rc = ethtool_set_dump(dev, useraddr); 3295 break; 3296 case ETHTOOL_GET_DUMP_FLAG: 3297 rc = ethtool_get_dump_flag(dev, useraddr); 3298 break; 3299 case ETHTOOL_GET_DUMP_DATA: 3300 rc = ethtool_get_dump_data(dev, useraddr); 3301 break; 3302 case ETHTOOL_GET_TS_INFO: 3303 rc = ethtool_get_ts_info(dev, useraddr); 3304 break; 3305 case ETHTOOL_GMODULEINFO: 3306 rc = ethtool_get_module_info(dev, useraddr); 3307 break; 3308 case ETHTOOL_GMODULEEEPROM: 3309 rc = ethtool_get_module_eeprom(dev, useraddr); 3310 break; 3311 case ETHTOOL_GTUNABLE: 3312 rc = ethtool_get_tunable(dev, useraddr); 3313 break; 3314 case ETHTOOL_STUNABLE: 3315 rc = ethtool_set_tunable(dev, useraddr); 3316 break; 3317 case ETHTOOL_GPHYSTATS: 3318 rc = ethtool_get_phy_stats(dev, useraddr); 3319 break; 3320 case ETHTOOL_PERQUEUE: 3321 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 3322 break; 3323 case ETHTOOL_GLINKSETTINGS: 3324 rc = ethtool_get_link_ksettings(dev, useraddr); 3325 break; 3326 case ETHTOOL_SLINKSETTINGS: 3327 rc = ethtool_set_link_ksettings(dev, useraddr); 3328 break; 3329 case ETHTOOL_PHY_GTUNABLE: 3330 rc = get_phy_tunable(dev, useraddr); 3331 break; 3332 case ETHTOOL_PHY_STUNABLE: 3333 rc = set_phy_tunable(dev, useraddr); 3334 break; 3335 case ETHTOOL_GFECPARAM: 3336 rc = ethtool_get_fecparam(dev, useraddr); 3337 break; 3338 case ETHTOOL_SFECPARAM: 3339 rc = ethtool_set_fecparam(dev, useraddr); 3340 break; 3341 default: 3342 rc = -EOPNOTSUPP; 3343 } 3344 3345 if (dev->ethtool_ops->complete) 3346 dev->ethtool_ops->complete(dev); 3347 3348 if (old_features != dev->features) 3349 netdev_features_change(dev); 3350 out: 3351 if (dev->dev.parent) 3352 pm_runtime_put(dev->dev.parent); 3353 3354 return rc; 3355 } 3356 3357 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr) 3358 { 3359 struct ethtool_devlink_compat *state; 3360 u32 ethcmd; 3361 int rc; 3362 3363 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 3364 return -EFAULT; 3365 3366 state = kzalloc(sizeof(*state), GFP_KERNEL); 3367 if (!state) 3368 return -ENOMEM; 3369 3370 switch (ethcmd) { 3371 case ETHTOOL_FLASHDEV: 3372 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) { 3373 rc = -EFAULT; 3374 goto exit_free; 3375 } 3376 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 3377 break; 3378 } 3379 3380 rtnl_lock(); 3381 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state); 3382 rtnl_unlock(); 3383 if (rc) 3384 goto exit_free; 3385 3386 switch (ethcmd) { 3387 case ETHTOOL_FLASHDEV: 3388 if (state->devlink) 3389 rc = devlink_compat_flash_update(state->devlink, 3390 state->efl.data); 3391 break; 3392 case ETHTOOL_GDRVINFO: 3393 if (state->devlink) 3394 devlink_compat_running_version(state->devlink, 3395 state->info.fw_version, 3396 sizeof(state->info.fw_version)); 3397 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) { 3398 rc = -EFAULT; 3399 goto exit_free; 3400 } 3401 break; 3402 } 3403 3404 exit_free: 3405 if (state->devlink) 3406 devlink_put(state->devlink); 3407 kfree(state); 3408 return rc; 3409 } 3410 3411 struct ethtool_rx_flow_key { 3412 struct flow_dissector_key_basic basic; 3413 union { 3414 struct flow_dissector_key_ipv4_addrs ipv4; 3415 struct flow_dissector_key_ipv6_addrs ipv6; 3416 }; 3417 struct flow_dissector_key_ports tp; 3418 struct flow_dissector_key_ip ip; 3419 struct flow_dissector_key_vlan vlan; 3420 struct flow_dissector_key_eth_addrs eth_addrs; 3421 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 3422 3423 struct ethtool_rx_flow_match { 3424 struct flow_dissector dissector; 3425 struct ethtool_rx_flow_key key; 3426 struct ethtool_rx_flow_key mask; 3427 }; 3428 3429 struct ethtool_rx_flow_rule * 3430 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 3431 { 3432 const struct ethtool_rx_flow_spec *fs = input->fs; 3433 struct ethtool_rx_flow_match *match; 3434 struct ethtool_rx_flow_rule *flow; 3435 struct flow_action_entry *act; 3436 3437 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 3438 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 3439 if (!flow) 3440 return ERR_PTR(-ENOMEM); 3441 3442 /* ethtool_rx supports only one single action per rule. */ 3443 flow->rule = flow_rule_alloc(1); 3444 if (!flow->rule) { 3445 kfree(flow); 3446 return ERR_PTR(-ENOMEM); 3447 } 3448 3449 match = (struct ethtool_rx_flow_match *)flow->priv; 3450 flow->rule->match.dissector = &match->dissector; 3451 flow->rule->match.mask = &match->mask; 3452 flow->rule->match.key = &match->key; 3453 3454 match->mask.basic.n_proto = htons(0xffff); 3455 3456 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3457 case ETHER_FLOW: { 3458 const struct ethhdr *ether_spec, *ether_m_spec; 3459 3460 ether_spec = &fs->h_u.ether_spec; 3461 ether_m_spec = &fs->m_u.ether_spec; 3462 3463 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 3464 ether_addr_copy(match->key.eth_addrs.src, 3465 ether_spec->h_source); 3466 ether_addr_copy(match->mask.eth_addrs.src, 3467 ether_m_spec->h_source); 3468 } 3469 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 3470 ether_addr_copy(match->key.eth_addrs.dst, 3471 ether_spec->h_dest); 3472 ether_addr_copy(match->mask.eth_addrs.dst, 3473 ether_m_spec->h_dest); 3474 } 3475 if (ether_m_spec->h_proto) { 3476 match->key.basic.n_proto = ether_spec->h_proto; 3477 match->mask.basic.n_proto = ether_m_spec->h_proto; 3478 } 3479 } 3480 break; 3481 case TCP_V4_FLOW: 3482 case UDP_V4_FLOW: { 3483 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 3484 3485 match->key.basic.n_proto = htons(ETH_P_IP); 3486 3487 v4_spec = &fs->h_u.tcp_ip4_spec; 3488 v4_m_spec = &fs->m_u.tcp_ip4_spec; 3489 3490 if (v4_m_spec->ip4src) { 3491 match->key.ipv4.src = v4_spec->ip4src; 3492 match->mask.ipv4.src = v4_m_spec->ip4src; 3493 } 3494 if (v4_m_spec->ip4dst) { 3495 match->key.ipv4.dst = v4_spec->ip4dst; 3496 match->mask.ipv4.dst = v4_m_spec->ip4dst; 3497 } 3498 if (v4_m_spec->ip4src || 3499 v4_m_spec->ip4dst) { 3500 match->dissector.used_keys |= 3501 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 3502 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 3503 offsetof(struct ethtool_rx_flow_key, ipv4); 3504 } 3505 if (v4_m_spec->psrc) { 3506 match->key.tp.src = v4_spec->psrc; 3507 match->mask.tp.src = v4_m_spec->psrc; 3508 } 3509 if (v4_m_spec->pdst) { 3510 match->key.tp.dst = v4_spec->pdst; 3511 match->mask.tp.dst = v4_m_spec->pdst; 3512 } 3513 if (v4_m_spec->psrc || 3514 v4_m_spec->pdst) { 3515 match->dissector.used_keys |= 3516 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS); 3517 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3518 offsetof(struct ethtool_rx_flow_key, tp); 3519 } 3520 if (v4_m_spec->tos) { 3521 match->key.ip.tos = v4_spec->tos; 3522 match->mask.ip.tos = v4_m_spec->tos; 3523 match->dissector.used_keys |= 3524 BIT(FLOW_DISSECTOR_KEY_IP); 3525 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3526 offsetof(struct ethtool_rx_flow_key, ip); 3527 } 3528 } 3529 break; 3530 case TCP_V6_FLOW: 3531 case UDP_V6_FLOW: { 3532 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 3533 3534 match->key.basic.n_proto = htons(ETH_P_IPV6); 3535 3536 v6_spec = &fs->h_u.tcp_ip6_spec; 3537 v6_m_spec = &fs->m_u.tcp_ip6_spec; 3538 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) { 3539 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 3540 sizeof(match->key.ipv6.src)); 3541 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 3542 sizeof(match->mask.ipv6.src)); 3543 } 3544 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) { 3545 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 3546 sizeof(match->key.ipv6.dst)); 3547 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 3548 sizeof(match->mask.ipv6.dst)); 3549 } 3550 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) || 3551 !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) { 3552 match->dissector.used_keys |= 3553 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 3554 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 3555 offsetof(struct ethtool_rx_flow_key, ipv6); 3556 } 3557 if (v6_m_spec->psrc) { 3558 match->key.tp.src = v6_spec->psrc; 3559 match->mask.tp.src = v6_m_spec->psrc; 3560 } 3561 if (v6_m_spec->pdst) { 3562 match->key.tp.dst = v6_spec->pdst; 3563 match->mask.tp.dst = v6_m_spec->pdst; 3564 } 3565 if (v6_m_spec->psrc || 3566 v6_m_spec->pdst) { 3567 match->dissector.used_keys |= 3568 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS); 3569 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3570 offsetof(struct ethtool_rx_flow_key, tp); 3571 } 3572 if (v6_m_spec->tclass) { 3573 match->key.ip.tos = v6_spec->tclass; 3574 match->mask.ip.tos = v6_m_spec->tclass; 3575 match->dissector.used_keys |= 3576 BIT_ULL(FLOW_DISSECTOR_KEY_IP); 3577 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3578 offsetof(struct ethtool_rx_flow_key, ip); 3579 } 3580 } 3581 break; 3582 default: 3583 ethtool_rx_flow_rule_destroy(flow); 3584 return ERR_PTR(-EINVAL); 3585 } 3586 3587 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3588 case TCP_V4_FLOW: 3589 case TCP_V6_FLOW: 3590 match->key.basic.ip_proto = IPPROTO_TCP; 3591 match->mask.basic.ip_proto = 0xff; 3592 break; 3593 case UDP_V4_FLOW: 3594 case UDP_V6_FLOW: 3595 match->key.basic.ip_proto = IPPROTO_UDP; 3596 match->mask.basic.ip_proto = 0xff; 3597 break; 3598 } 3599 3600 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC); 3601 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3602 offsetof(struct ethtool_rx_flow_key, basic); 3603 3604 if (fs->flow_type & FLOW_EXT) { 3605 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3606 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3607 3608 if (ext_m_spec->vlan_etype) { 3609 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3610 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3611 } 3612 3613 if (ext_m_spec->vlan_tci) { 3614 match->key.vlan.vlan_id = 3615 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3616 match->mask.vlan.vlan_id = 3617 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3618 3619 match->key.vlan.vlan_dei = 3620 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3621 match->mask.vlan.vlan_dei = 3622 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3623 3624 match->key.vlan.vlan_priority = 3625 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3626 match->mask.vlan.vlan_priority = 3627 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3628 } 3629 3630 if (ext_m_spec->vlan_etype || 3631 ext_m_spec->vlan_tci) { 3632 match->dissector.used_keys |= 3633 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN); 3634 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3635 offsetof(struct ethtool_rx_flow_key, vlan); 3636 } 3637 } 3638 if (fs->flow_type & FLOW_MAC_EXT) { 3639 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3640 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3641 3642 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3643 ETH_ALEN); 3644 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3645 ETH_ALEN); 3646 3647 match->dissector.used_keys |= 3648 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3649 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3650 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3651 } 3652 3653 act = &flow->rule->action.entries[0]; 3654 switch (fs->ring_cookie) { 3655 case RX_CLS_FLOW_DISC: 3656 act->id = FLOW_ACTION_DROP; 3657 break; 3658 case RX_CLS_FLOW_WAKE: 3659 act->id = FLOW_ACTION_WAKE; 3660 break; 3661 default: 3662 act->id = FLOW_ACTION_QUEUE; 3663 if (fs->flow_type & FLOW_RSS) 3664 act->queue.ctx = input->rss_ctx; 3665 3666 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3667 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3668 break; 3669 } 3670 3671 return flow; 3672 } 3673 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3674 3675 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3676 { 3677 kfree(flow->rule); 3678 kfree(flow); 3679 } 3680 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3681