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