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 ops->create_rxfh_context)) 1235 return -EOPNOTSUPP; 1236 1237 rxfh.indir_size = rxfh_dev.indir_size; 1238 rxfh.key_size = rxfh_dev.key_size; 1239 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1240 return -EFAULT; 1241 1242 if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) || 1243 (user_key_size && user_key_size != rxfh_dev.key_size)) 1244 return -EINVAL; 1245 1246 indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]); 1247 total_size = indir_bytes + user_key_size; 1248 rss_config = kzalloc(total_size, GFP_USER); 1249 if (!rss_config) 1250 return -ENOMEM; 1251 1252 if (user_indir_size) 1253 rxfh_dev.indir = (u32 *)rss_config; 1254 1255 if (user_key_size) 1256 rxfh_dev.key = rss_config + indir_bytes; 1257 1258 if (rxfh.rss_context) { 1259 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context); 1260 if (!ctx) { 1261 ret = -ENOENT; 1262 goto out; 1263 } 1264 if (rxfh_dev.indir) 1265 memcpy(rxfh_dev.indir, ethtool_rxfh_context_indir(ctx), 1266 indir_bytes); 1267 if (!ops->rxfh_per_ctx_key) { 1268 rxfh_dev.key_size = 0; 1269 } else { 1270 if (rxfh_dev.key) 1271 memcpy(rxfh_dev.key, 1272 ethtool_rxfh_context_key(ctx), 1273 user_key_size); 1274 rxfh_dev.hfunc = ctx->hfunc; 1275 } 1276 rxfh_dev.input_xfrm = ctx->input_xfrm; 1277 ret = 0; 1278 } else { 1279 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev); 1280 if (ret) 1281 goto out; 1282 } 1283 1284 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1285 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) { 1286 ret = -EFAULT; 1287 } else if (copy_to_user(useraddr + 1288 offsetof(struct ethtool_rxfh, input_xfrm), 1289 &rxfh_dev.input_xfrm, 1290 sizeof(rxfh.input_xfrm))) { 1291 ret = -EFAULT; 1292 } else if (copy_to_user(useraddr + 1293 offsetof(struct ethtool_rxfh, key_size), 1294 &rxfh_dev.key_size, 1295 sizeof(rxfh.key_size))) { 1296 ret = -EFAULT; 1297 } else if (copy_to_user(useraddr + 1298 offsetof(struct ethtool_rxfh, rss_config[0]), 1299 rss_config, total_size)) { 1300 ret = -EFAULT; 1301 } 1302 out: 1303 kfree(rss_config); 1304 1305 return ret; 1306 } 1307 1308 static struct ethtool_rxfh_context * 1309 ethtool_rxfh_ctx_alloc(const struct ethtool_ops *ops, 1310 u32 indir_size, u32 key_size) 1311 { 1312 size_t indir_bytes, flex_len, key_off, size; 1313 struct ethtool_rxfh_context *ctx; 1314 u32 priv_bytes, indir_max; 1315 u16 key_max; 1316 1317 key_max = max(key_size, ops->rxfh_key_space); 1318 indir_max = max(indir_size, ops->rxfh_indir_space); 1319 1320 priv_bytes = ALIGN(ops->rxfh_priv_size, sizeof(u32)); 1321 indir_bytes = array_size(indir_max, sizeof(u32)); 1322 1323 key_off = size_add(priv_bytes, indir_bytes); 1324 flex_len = size_add(key_off, key_max); 1325 size = struct_size_t(struct ethtool_rxfh_context, data, flex_len); 1326 1327 ctx = kzalloc(size, GFP_KERNEL_ACCOUNT); 1328 if (!ctx) 1329 return NULL; 1330 1331 ctx->indir_size = indir_size; 1332 ctx->key_size = key_size; 1333 ctx->key_off = key_off; 1334 ctx->priv_size = ops->rxfh_priv_size; 1335 1336 ctx->hfunc = ETH_RSS_HASH_NO_CHANGE; 1337 ctx->input_xfrm = RXH_XFRM_NO_CHANGE; 1338 1339 return ctx; 1340 } 1341 1342 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1343 void __user *useraddr) 1344 { 1345 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1346 const struct ethtool_ops *ops = dev->ethtool_ops; 1347 u32 dev_indir_size = 0, dev_key_size = 0, i; 1348 u32 user_indir_len = 0, indir_bytes = 0; 1349 struct ethtool_rxfh_param rxfh_dev = {}; 1350 struct ethtool_rxfh_context *ctx = NULL; 1351 struct netlink_ext_ack *extack = NULL; 1352 struct ethtool_rxnfc rx_rings; 1353 struct ethtool_rxfh rxfh; 1354 bool locked = false; /* dev->ethtool->rss_lock taken */ 1355 bool create = false; 1356 u8 *rss_config; 1357 int ret; 1358 1359 if (!ops->get_rxnfc || !ops->set_rxfh) 1360 return -EOPNOTSUPP; 1361 1362 if (ops->get_rxfh_indir_size) 1363 dev_indir_size = ops->get_rxfh_indir_size(dev); 1364 if (ops->get_rxfh_key_size) 1365 dev_key_size = ops->get_rxfh_key_size(dev); 1366 1367 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1368 return -EFAULT; 1369 1370 /* Check that reserved fields are 0 for now */ 1371 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) 1372 return -EINVAL; 1373 /* Most drivers don't handle rss_context, check it's 0 as well */ 1374 if (rxfh.rss_context && !(ops->cap_rss_ctx_supported || 1375 ops->create_rxfh_context)) 1376 return -EOPNOTSUPP; 1377 /* Check input data transformation capabilities */ 1378 if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR && 1379 rxfh.input_xfrm != RXH_XFRM_NO_CHANGE) 1380 return -EINVAL; 1381 if (rxfh.input_xfrm != RXH_XFRM_NO_CHANGE && 1382 (rxfh.input_xfrm & RXH_XFRM_SYM_XOR) && 1383 !ops->cap_rss_sym_xor_supported) 1384 return -EOPNOTSUPP; 1385 create = rxfh.rss_context == ETH_RXFH_CONTEXT_ALLOC; 1386 1387 if ((rxfh.indir_size && 1388 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1389 rxfh.indir_size != dev_indir_size) || 1390 (rxfh.key_size && rxfh.key_size != dev_key_size)) 1391 return -EINVAL; 1392 1393 /* Must request at least one change: indir size, hash key, function 1394 * or input transformation. 1395 * There's no need for any of it in case of context creation. 1396 */ 1397 if (!create && 1398 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1399 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE && 1400 rxfh.input_xfrm == RXH_XFRM_NO_CHANGE)) 1401 return -EINVAL; 1402 1403 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]); 1404 1405 /* Check settings which may be global rather than per RSS-context */ 1406 if (rxfh.rss_context && !ops->rxfh_per_ctx_key) 1407 if (rxfh.key_size || 1408 (rxfh.hfunc && rxfh.hfunc != ETH_RSS_HASH_NO_CHANGE) || 1409 (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)) 1410 return -EOPNOTSUPP; 1411 1412 rss_config = kzalloc(indir_bytes + dev_key_size, GFP_USER); 1413 if (!rss_config) 1414 return -ENOMEM; 1415 1416 rx_rings.cmd = ETHTOOL_GRXRINGS; 1417 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1418 if (ret) 1419 goto out; 1420 1421 /* rxfh.indir_size == 0 means reset the indir table to default (master 1422 * context) or delete the context (other RSS contexts). 1423 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1424 */ 1425 if (rxfh.indir_size && 1426 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1427 user_indir_len = indir_bytes; 1428 rxfh_dev.indir = (u32 *)rss_config; 1429 rxfh_dev.indir_size = dev_indir_size; 1430 ret = ethtool_copy_validate_indir(rxfh_dev.indir, 1431 useraddr + rss_cfg_offset, 1432 &rx_rings, 1433 rxfh.indir_size); 1434 if (ret) 1435 goto out; 1436 } else if (rxfh.indir_size == 0) { 1437 if (rxfh.rss_context == 0) { 1438 u32 *indir; 1439 1440 rxfh_dev.indir = (u32 *)rss_config; 1441 rxfh_dev.indir_size = dev_indir_size; 1442 indir = rxfh_dev.indir; 1443 for (i = 0; i < dev_indir_size; i++) 1444 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1445 } else { 1446 rxfh_dev.rss_delete = true; 1447 } 1448 } 1449 1450 if (rxfh.key_size) { 1451 rxfh_dev.key_size = dev_key_size; 1452 rxfh_dev.key = rss_config + indir_bytes; 1453 if (copy_from_user(rxfh_dev.key, 1454 useraddr + rss_cfg_offset + user_indir_len, 1455 rxfh.key_size)) { 1456 ret = -EFAULT; 1457 goto out; 1458 } 1459 } 1460 1461 if (rxfh.rss_context) { 1462 mutex_lock(&dev->ethtool->rss_lock); 1463 locked = true; 1464 } 1465 if (create) { 1466 if (rxfh_dev.rss_delete) { 1467 ret = -EINVAL; 1468 goto out; 1469 } 1470 ctx = ethtool_rxfh_ctx_alloc(ops, dev_indir_size, dev_key_size); 1471 if (!ctx) { 1472 ret = -ENOMEM; 1473 goto out; 1474 } 1475 1476 if (ops->create_rxfh_context) { 1477 u32 limit = ops->rxfh_max_num_contexts ?: U32_MAX; 1478 u32 ctx_id; 1479 1480 /* driver uses new API, core allocates ID */ 1481 ret = xa_alloc(&dev->ethtool->rss_ctx, &ctx_id, ctx, 1482 XA_LIMIT(1, limit - 1), 1483 GFP_KERNEL_ACCOUNT); 1484 if (ret < 0) { 1485 kfree(ctx); 1486 goto out; 1487 } 1488 WARN_ON(!ctx_id); /* can't happen */ 1489 rxfh.rss_context = ctx_id; 1490 } 1491 } else if (rxfh.rss_context) { 1492 ctx = xa_load(&dev->ethtool->rss_ctx, rxfh.rss_context); 1493 if (!ctx) { 1494 ret = -ENOENT; 1495 goto out; 1496 } 1497 } 1498 rxfh_dev.hfunc = rxfh.hfunc; 1499 rxfh_dev.rss_context = rxfh.rss_context; 1500 rxfh_dev.input_xfrm = rxfh.input_xfrm; 1501 1502 if (rxfh.rss_context && ops->create_rxfh_context) { 1503 if (create) { 1504 ret = ops->create_rxfh_context(dev, ctx, &rxfh_dev, 1505 extack); 1506 /* Make sure driver populates defaults */ 1507 WARN_ON_ONCE(!ret && !rxfh_dev.key && 1508 !memchr_inv(ethtool_rxfh_context_key(ctx), 1509 0, ctx->key_size)); 1510 } else if (rxfh_dev.rss_delete) { 1511 ret = ops->remove_rxfh_context(dev, ctx, 1512 rxfh.rss_context, 1513 extack); 1514 } else { 1515 ret = ops->modify_rxfh_context(dev, ctx, &rxfh_dev, 1516 extack); 1517 } 1518 } else { 1519 ret = ops->set_rxfh(dev, &rxfh_dev, extack); 1520 } 1521 if (ret) { 1522 if (create) { 1523 /* failed to create, free our new tracking entry */ 1524 if (ops->create_rxfh_context) 1525 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context); 1526 kfree(ctx); 1527 } 1528 goto out; 1529 } 1530 1531 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1532 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context))) 1533 ret = -EFAULT; 1534 1535 if (!rxfh_dev.rss_context) { 1536 /* indicate whether rxfh was set to default */ 1537 if (rxfh.indir_size == 0) 1538 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1539 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1540 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1541 } 1542 /* Update rss_ctx tracking */ 1543 if (create && !ops->create_rxfh_context) { 1544 /* driver uses old API, it chose context ID */ 1545 if (WARN_ON(xa_load(&dev->ethtool->rss_ctx, rxfh_dev.rss_context))) { 1546 /* context ID reused, our tracking is screwed */ 1547 kfree(ctx); 1548 goto out; 1549 } 1550 /* Allocate the exact ID the driver gave us */ 1551 if (xa_is_err(xa_store(&dev->ethtool->rss_ctx, rxfh_dev.rss_context, 1552 ctx, GFP_KERNEL))) { 1553 kfree(ctx); 1554 goto out; 1555 } 1556 1557 /* Fetch the defaults for the old API, in the new API drivers 1558 * should write defaults into ctx themselves. 1559 */ 1560 rxfh_dev.indir = (u32 *)rss_config; 1561 rxfh_dev.indir_size = dev_indir_size; 1562 1563 rxfh_dev.key = rss_config + indir_bytes; 1564 rxfh_dev.key_size = dev_key_size; 1565 1566 ret = ops->get_rxfh(dev, &rxfh_dev); 1567 if (WARN_ON(ret)) { 1568 xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context); 1569 kfree(ctx); 1570 goto out; 1571 } 1572 } 1573 if (rxfh_dev.rss_delete) { 1574 WARN_ON(xa_erase(&dev->ethtool->rss_ctx, rxfh.rss_context) != ctx); 1575 kfree(ctx); 1576 } else if (ctx) { 1577 if (rxfh_dev.indir) { 1578 for (i = 0; i < dev_indir_size; i++) 1579 ethtool_rxfh_context_indir(ctx)[i] = rxfh_dev.indir[i]; 1580 ctx->indir_configured = 1581 rxfh.indir_size && 1582 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE; 1583 } 1584 if (rxfh_dev.key) { 1585 memcpy(ethtool_rxfh_context_key(ctx), rxfh_dev.key, 1586 dev_key_size); 1587 ctx->key_configured = !!rxfh.key_size; 1588 } 1589 if (rxfh_dev.hfunc != ETH_RSS_HASH_NO_CHANGE) 1590 ctx->hfunc = rxfh_dev.hfunc; 1591 if (rxfh_dev.input_xfrm != RXH_XFRM_NO_CHANGE) 1592 ctx->input_xfrm = rxfh_dev.input_xfrm; 1593 } 1594 1595 out: 1596 if (locked) 1597 mutex_unlock(&dev->ethtool->rss_lock); 1598 kfree(rss_config); 1599 return ret; 1600 } 1601 1602 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1603 { 1604 struct ethtool_regs regs; 1605 const struct ethtool_ops *ops = dev->ethtool_ops; 1606 void *regbuf; 1607 int reglen, ret; 1608 1609 if (!ops->get_regs || !ops->get_regs_len) 1610 return -EOPNOTSUPP; 1611 1612 if (copy_from_user(®s, useraddr, sizeof(regs))) 1613 return -EFAULT; 1614 1615 reglen = ops->get_regs_len(dev); 1616 if (reglen <= 0) 1617 return reglen; 1618 1619 if (regs.len > reglen) 1620 regs.len = reglen; 1621 1622 regbuf = vzalloc(reglen); 1623 if (!regbuf) 1624 return -ENOMEM; 1625 1626 if (regs.len < reglen) 1627 reglen = regs.len; 1628 1629 ops->get_regs(dev, ®s, regbuf); 1630 1631 ret = -EFAULT; 1632 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1633 goto out; 1634 useraddr += offsetof(struct ethtool_regs, data); 1635 if (copy_to_user(useraddr, regbuf, reglen)) 1636 goto out; 1637 ret = 0; 1638 1639 out: 1640 vfree(regbuf); 1641 return ret; 1642 } 1643 1644 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1645 { 1646 struct ethtool_value reset; 1647 int ret; 1648 1649 if (!dev->ethtool_ops->reset) 1650 return -EOPNOTSUPP; 1651 1652 if (dev->ethtool->module_fw_flash_in_progress) 1653 return -EBUSY; 1654 1655 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1656 return -EFAULT; 1657 1658 ret = dev->ethtool_ops->reset(dev, &reset.data); 1659 if (ret) 1660 return ret; 1661 1662 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1663 return -EFAULT; 1664 return 0; 1665 } 1666 1667 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1668 { 1669 struct ethtool_wolinfo wol; 1670 1671 if (!dev->ethtool_ops->get_wol) 1672 return -EOPNOTSUPP; 1673 1674 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1675 wol.cmd = ETHTOOL_GWOL; 1676 dev->ethtool_ops->get_wol(dev, &wol); 1677 1678 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1679 return -EFAULT; 1680 return 0; 1681 } 1682 1683 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1684 { 1685 struct ethtool_wolinfo wol, cur_wol; 1686 int ret; 1687 1688 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol) 1689 return -EOPNOTSUPP; 1690 1691 memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo)); 1692 cur_wol.cmd = ETHTOOL_GWOL; 1693 dev->ethtool_ops->get_wol(dev, &cur_wol); 1694 1695 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1696 return -EFAULT; 1697 1698 if (wol.wolopts & ~cur_wol.supported) 1699 return -EINVAL; 1700 1701 if (wol.wolopts == cur_wol.wolopts && 1702 !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass))) 1703 return 0; 1704 1705 ret = dev->ethtool_ops->set_wol(dev, &wol); 1706 if (ret) 1707 return ret; 1708 1709 dev->ethtool->wol_enabled = !!wol.wolopts; 1710 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 1711 1712 return 0; 1713 } 1714 1715 static void eee_to_keee(struct ethtool_keee *keee, 1716 const struct ethtool_eee *eee) 1717 { 1718 memset(keee, 0, sizeof(*keee)); 1719 1720 keee->eee_enabled = eee->eee_enabled; 1721 keee->tx_lpi_enabled = eee->tx_lpi_enabled; 1722 keee->tx_lpi_timer = eee->tx_lpi_timer; 1723 1724 ethtool_convert_legacy_u32_to_link_mode(keee->advertised, 1725 eee->advertised); 1726 } 1727 1728 static void keee_to_eee(struct ethtool_eee *eee, 1729 const struct ethtool_keee *keee) 1730 { 1731 bool overflow; 1732 1733 memset(eee, 0, sizeof(*eee)); 1734 1735 eee->eee_active = keee->eee_active; 1736 eee->eee_enabled = keee->eee_enabled; 1737 eee->tx_lpi_enabled = keee->tx_lpi_enabled; 1738 eee->tx_lpi_timer = keee->tx_lpi_timer; 1739 1740 overflow = !ethtool_convert_link_mode_to_legacy_u32(&eee->supported, 1741 keee->supported); 1742 ethtool_convert_link_mode_to_legacy_u32(&eee->advertised, 1743 keee->advertised); 1744 ethtool_convert_link_mode_to_legacy_u32(&eee->lp_advertised, 1745 keee->lp_advertised); 1746 if (overflow) 1747 pr_warn("Ethtool ioctl interface doesn't support passing EEE linkmodes beyond bit 32\n"); 1748 } 1749 1750 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1751 { 1752 struct ethtool_keee keee; 1753 struct ethtool_eee eee; 1754 int rc; 1755 1756 if (!dev->ethtool_ops->get_eee) 1757 return -EOPNOTSUPP; 1758 1759 memset(&keee, 0, sizeof(keee)); 1760 rc = dev->ethtool_ops->get_eee(dev, &keee); 1761 if (rc) 1762 return rc; 1763 1764 keee_to_eee(&eee, &keee); 1765 if (copy_to_user(useraddr, &eee, sizeof(eee))) 1766 return -EFAULT; 1767 1768 return 0; 1769 } 1770 1771 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1772 { 1773 struct ethtool_keee keee; 1774 struct ethtool_eee eee; 1775 int ret; 1776 1777 if (!dev->ethtool_ops->set_eee) 1778 return -EOPNOTSUPP; 1779 1780 if (copy_from_user(&eee, useraddr, sizeof(eee))) 1781 return -EFAULT; 1782 1783 eee_to_keee(&keee, &eee); 1784 ret = dev->ethtool_ops->set_eee(dev, &keee); 1785 if (!ret) 1786 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL); 1787 return ret; 1788 } 1789 1790 static int ethtool_nway_reset(struct net_device *dev) 1791 { 1792 if (!dev->ethtool_ops->nway_reset) 1793 return -EOPNOTSUPP; 1794 1795 return dev->ethtool_ops->nway_reset(dev); 1796 } 1797 1798 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1799 { 1800 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1801 int link = __ethtool_get_link(dev); 1802 1803 if (link < 0) 1804 return link; 1805 1806 edata.data = link; 1807 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1808 return -EFAULT; 1809 return 0; 1810 } 1811 1812 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1813 int (*getter)(struct net_device *, 1814 struct ethtool_eeprom *, u8 *), 1815 u32 total_len) 1816 { 1817 struct ethtool_eeprom eeprom; 1818 void __user *userbuf = useraddr + sizeof(eeprom); 1819 u32 bytes_remaining; 1820 u8 *data; 1821 int ret = 0; 1822 1823 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1824 return -EFAULT; 1825 1826 /* Check for wrap and zero */ 1827 if (eeprom.offset + eeprom.len <= eeprom.offset) 1828 return -EINVAL; 1829 1830 /* Check for exceeding total eeprom len */ 1831 if (eeprom.offset + eeprom.len > total_len) 1832 return -EINVAL; 1833 1834 data = kzalloc(PAGE_SIZE, GFP_USER); 1835 if (!data) 1836 return -ENOMEM; 1837 1838 bytes_remaining = eeprom.len; 1839 while (bytes_remaining > 0) { 1840 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1841 1842 ret = getter(dev, &eeprom, data); 1843 if (ret) 1844 break; 1845 if (!eeprom.len) { 1846 ret = -EIO; 1847 break; 1848 } 1849 if (copy_to_user(userbuf, data, eeprom.len)) { 1850 ret = -EFAULT; 1851 break; 1852 } 1853 userbuf += eeprom.len; 1854 eeprom.offset += eeprom.len; 1855 bytes_remaining -= eeprom.len; 1856 } 1857 1858 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1859 eeprom.offset -= eeprom.len; 1860 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1861 ret = -EFAULT; 1862 1863 kfree(data); 1864 return ret; 1865 } 1866 1867 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1868 { 1869 const struct ethtool_ops *ops = dev->ethtool_ops; 1870 1871 if (!ops->get_eeprom || !ops->get_eeprom_len || 1872 !ops->get_eeprom_len(dev)) 1873 return -EOPNOTSUPP; 1874 1875 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1876 ops->get_eeprom_len(dev)); 1877 } 1878 1879 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1880 { 1881 struct ethtool_eeprom eeprom; 1882 const struct ethtool_ops *ops = dev->ethtool_ops; 1883 void __user *userbuf = useraddr + sizeof(eeprom); 1884 u32 bytes_remaining; 1885 u8 *data; 1886 int ret = 0; 1887 1888 if (!ops->set_eeprom || !ops->get_eeprom_len || 1889 !ops->get_eeprom_len(dev)) 1890 return -EOPNOTSUPP; 1891 1892 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1893 return -EFAULT; 1894 1895 /* Check for wrap and zero */ 1896 if (eeprom.offset + eeprom.len <= eeprom.offset) 1897 return -EINVAL; 1898 1899 /* Check for exceeding total eeprom len */ 1900 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1901 return -EINVAL; 1902 1903 data = kzalloc(PAGE_SIZE, GFP_USER); 1904 if (!data) 1905 return -ENOMEM; 1906 1907 bytes_remaining = eeprom.len; 1908 while (bytes_remaining > 0) { 1909 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1910 1911 if (copy_from_user(data, userbuf, eeprom.len)) { 1912 ret = -EFAULT; 1913 break; 1914 } 1915 ret = ops->set_eeprom(dev, &eeprom, data); 1916 if (ret) 1917 break; 1918 userbuf += eeprom.len; 1919 eeprom.offset += eeprom.len; 1920 bytes_remaining -= eeprom.len; 1921 } 1922 1923 kfree(data); 1924 return ret; 1925 } 1926 1927 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1928 void __user *useraddr) 1929 { 1930 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1931 struct kernel_ethtool_coalesce kernel_coalesce = {}; 1932 int ret; 1933 1934 if (!dev->ethtool_ops->get_coalesce) 1935 return -EOPNOTSUPP; 1936 1937 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce, 1938 NULL); 1939 if (ret) 1940 return ret; 1941 1942 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1943 return -EFAULT; 1944 return 0; 1945 } 1946 1947 static bool 1948 ethtool_set_coalesce_supported(struct net_device *dev, 1949 struct ethtool_coalesce *coalesce) 1950 { 1951 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1952 u32 nonzero_params = 0; 1953 1954 if (coalesce->rx_coalesce_usecs) 1955 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1956 if (coalesce->rx_max_coalesced_frames) 1957 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1958 if (coalesce->rx_coalesce_usecs_irq) 1959 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1960 if (coalesce->rx_max_coalesced_frames_irq) 1961 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1962 if (coalesce->tx_coalesce_usecs) 1963 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1964 if (coalesce->tx_max_coalesced_frames) 1965 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1966 if (coalesce->tx_coalesce_usecs_irq) 1967 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1968 if (coalesce->tx_max_coalesced_frames_irq) 1969 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1970 if (coalesce->stats_block_coalesce_usecs) 1971 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1972 if (coalesce->use_adaptive_rx_coalesce) 1973 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1974 if (coalesce->use_adaptive_tx_coalesce) 1975 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1976 if (coalesce->pkt_rate_low) 1977 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1978 if (coalesce->rx_coalesce_usecs_low) 1979 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1980 if (coalesce->rx_max_coalesced_frames_low) 1981 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1982 if (coalesce->tx_coalesce_usecs_low) 1983 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1984 if (coalesce->tx_max_coalesced_frames_low) 1985 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1986 if (coalesce->pkt_rate_high) 1987 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1988 if (coalesce->rx_coalesce_usecs_high) 1989 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1990 if (coalesce->rx_max_coalesced_frames_high) 1991 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1992 if (coalesce->tx_coalesce_usecs_high) 1993 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1994 if (coalesce->tx_max_coalesced_frames_high) 1995 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1996 if (coalesce->rate_sample_interval) 1997 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1998 1999 return (supported_params & nonzero_params) == nonzero_params; 2000 } 2001 2002 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 2003 void __user *useraddr) 2004 { 2005 struct kernel_ethtool_coalesce kernel_coalesce = {}; 2006 struct ethtool_coalesce coalesce; 2007 int ret; 2008 2009 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce) 2010 return -EOPNOTSUPP; 2011 2012 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce, 2013 NULL); 2014 if (ret) 2015 return ret; 2016 2017 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 2018 return -EFAULT; 2019 2020 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 2021 return -EOPNOTSUPP; 2022 2023 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce, 2024 NULL); 2025 if (!ret) 2026 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); 2027 return ret; 2028 } 2029 2030 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 2031 { 2032 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 2033 struct kernel_ethtool_ringparam kernel_ringparam = {}; 2034 2035 if (!dev->ethtool_ops->get_ringparam) 2036 return -EOPNOTSUPP; 2037 2038 dev->ethtool_ops->get_ringparam(dev, &ringparam, 2039 &kernel_ringparam, NULL); 2040 2041 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 2042 return -EFAULT; 2043 return 0; 2044 } 2045 2046 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 2047 { 2048 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 2049 struct kernel_ethtool_ringparam kernel_ringparam; 2050 int ret; 2051 2052 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 2053 return -EOPNOTSUPP; 2054 2055 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 2056 return -EFAULT; 2057 2058 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL); 2059 2060 /* ensure new ring parameters are within the maximums */ 2061 if (ringparam.rx_pending > max.rx_max_pending || 2062 ringparam.rx_mini_pending > max.rx_mini_max_pending || 2063 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 2064 ringparam.tx_pending > max.tx_max_pending) 2065 return -EINVAL; 2066 2067 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, 2068 &kernel_ringparam, NULL); 2069 if (!ret) 2070 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 2071 return ret; 2072 } 2073 2074 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 2075 void __user *useraddr) 2076 { 2077 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 2078 2079 if (!dev->ethtool_ops->get_channels) 2080 return -EOPNOTSUPP; 2081 2082 dev->ethtool_ops->get_channels(dev, &channels); 2083 2084 if (copy_to_user(useraddr, &channels, sizeof(channels))) 2085 return -EFAULT; 2086 return 0; 2087 } 2088 2089 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 2090 void __user *useraddr) 2091 { 2092 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 2093 u16 from_channel, to_channel; 2094 unsigned int i; 2095 int ret; 2096 2097 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 2098 return -EOPNOTSUPP; 2099 2100 if (copy_from_user(&channels, useraddr, sizeof(channels))) 2101 return -EFAULT; 2102 2103 dev->ethtool_ops->get_channels(dev, &curr); 2104 2105 if (channels.rx_count == curr.rx_count && 2106 channels.tx_count == curr.tx_count && 2107 channels.combined_count == curr.combined_count && 2108 channels.other_count == curr.other_count) 2109 return 0; 2110 2111 /* ensure new counts are within the maximums */ 2112 if (channels.rx_count > curr.max_rx || 2113 channels.tx_count > curr.max_tx || 2114 channels.combined_count > curr.max_combined || 2115 channels.other_count > curr.max_other) 2116 return -EINVAL; 2117 2118 /* ensure there is at least one RX and one TX channel */ 2119 if (!channels.combined_count && 2120 (!channels.rx_count || !channels.tx_count)) 2121 return -EINVAL; 2122 2123 ret = ethtool_check_max_channel(dev, channels, NULL); 2124 if (ret) 2125 return ret; 2126 2127 /* Disabling channels, query zero-copy AF_XDP sockets */ 2128 from_channel = channels.combined_count + 2129 min(channels.rx_count, channels.tx_count); 2130 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 2131 for (i = from_channel; i < to_channel; i++) 2132 if (xsk_get_pool_from_qid(dev, i)) 2133 return -EINVAL; 2134 2135 ret = dev->ethtool_ops->set_channels(dev, &channels); 2136 if (!ret) 2137 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 2138 return ret; 2139 } 2140 2141 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 2142 { 2143 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 2144 2145 if (!dev->ethtool_ops->get_pauseparam) 2146 return -EOPNOTSUPP; 2147 2148 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 2149 2150 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 2151 return -EFAULT; 2152 return 0; 2153 } 2154 2155 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 2156 { 2157 struct ethtool_pauseparam pauseparam; 2158 int ret; 2159 2160 if (!dev->ethtool_ops->set_pauseparam) 2161 return -EOPNOTSUPP; 2162 2163 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 2164 return -EFAULT; 2165 2166 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 2167 if (!ret) 2168 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); 2169 return ret; 2170 } 2171 2172 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 2173 { 2174 struct ethtool_test test; 2175 const struct ethtool_ops *ops = dev->ethtool_ops; 2176 u64 *data; 2177 int ret, test_len; 2178 2179 if (!ops->self_test || !ops->get_sset_count) 2180 return -EOPNOTSUPP; 2181 2182 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 2183 if (test_len < 0) 2184 return test_len; 2185 WARN_ON(test_len == 0); 2186 2187 if (copy_from_user(&test, useraddr, sizeof(test))) 2188 return -EFAULT; 2189 2190 test.len = test_len; 2191 data = kcalloc(test_len, sizeof(u64), GFP_USER); 2192 if (!data) 2193 return -ENOMEM; 2194 2195 netif_testing_on(dev); 2196 ops->self_test(dev, &test, data); 2197 netif_testing_off(dev); 2198 2199 ret = -EFAULT; 2200 if (copy_to_user(useraddr, &test, sizeof(test))) 2201 goto out; 2202 useraddr += sizeof(test); 2203 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64)))) 2204 goto out; 2205 ret = 0; 2206 2207 out: 2208 kfree(data); 2209 return ret; 2210 } 2211 2212 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 2213 { 2214 struct ethtool_gstrings gstrings; 2215 u8 *data; 2216 int ret; 2217 2218 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 2219 return -EFAULT; 2220 2221 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 2222 if (ret < 0) 2223 return ret; 2224 if (ret > S32_MAX / ETH_GSTRING_LEN) 2225 return -ENOMEM; 2226 WARN_ON_ONCE(!ret); 2227 2228 gstrings.len = ret; 2229 2230 if (gstrings.len) { 2231 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 2232 if (!data) 2233 return -ENOMEM; 2234 2235 __ethtool_get_strings(dev, gstrings.string_set, data); 2236 } else { 2237 data = NULL; 2238 } 2239 2240 ret = -EFAULT; 2241 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 2242 goto out; 2243 useraddr += sizeof(gstrings); 2244 if (gstrings.len && 2245 copy_to_user(useraddr, data, 2246 array_size(gstrings.len, ETH_GSTRING_LEN))) 2247 goto out; 2248 ret = 0; 2249 2250 out: 2251 vfree(data); 2252 return ret; 2253 } 2254 2255 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...) 2256 { 2257 va_list args; 2258 2259 va_start(args, fmt); 2260 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args); 2261 va_end(args); 2262 2263 *data += ETH_GSTRING_LEN; 2264 } 2265 EXPORT_SYMBOL(ethtool_sprintf); 2266 2267 void ethtool_puts(u8 **data, const char *str) 2268 { 2269 strscpy(*data, str, ETH_GSTRING_LEN); 2270 *data += ETH_GSTRING_LEN; 2271 } 2272 EXPORT_SYMBOL(ethtool_puts); 2273 2274 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 2275 { 2276 struct ethtool_value id; 2277 static bool busy; 2278 const struct ethtool_ops *ops = dev->ethtool_ops; 2279 netdevice_tracker dev_tracker; 2280 int rc; 2281 2282 if (!ops->set_phys_id) 2283 return -EOPNOTSUPP; 2284 2285 if (busy) 2286 return -EBUSY; 2287 2288 if (copy_from_user(&id, useraddr, sizeof(id))) 2289 return -EFAULT; 2290 2291 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 2292 if (rc < 0) 2293 return rc; 2294 2295 /* Drop the RTNL lock while waiting, but prevent reentry or 2296 * removal of the device. 2297 */ 2298 busy = true; 2299 netdev_hold(dev, &dev_tracker, GFP_KERNEL); 2300 rtnl_unlock(); 2301 2302 if (rc == 0) { 2303 /* Driver will handle this itself */ 2304 schedule_timeout_interruptible( 2305 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 2306 } else { 2307 /* Driver expects to be called at twice the frequency in rc */ 2308 int n = rc * 2, interval = HZ / n; 2309 u64 count = mul_u32_u32(n, id.data); 2310 u64 i = 0; 2311 2312 do { 2313 rtnl_lock(); 2314 rc = ops->set_phys_id(dev, 2315 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 2316 rtnl_unlock(); 2317 if (rc) 2318 break; 2319 schedule_timeout_interruptible(interval); 2320 } while (!signal_pending(current) && (!id.data || i < count)); 2321 } 2322 2323 rtnl_lock(); 2324 netdev_put(dev, &dev_tracker); 2325 busy = false; 2326 2327 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 2328 return rc; 2329 } 2330 2331 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 2332 { 2333 struct ethtool_stats stats; 2334 const struct ethtool_ops *ops = dev->ethtool_ops; 2335 u64 *data; 2336 int ret, n_stats; 2337 2338 if (!ops->get_ethtool_stats || !ops->get_sset_count) 2339 return -EOPNOTSUPP; 2340 2341 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 2342 if (n_stats < 0) 2343 return n_stats; 2344 if (n_stats > S32_MAX / sizeof(u64)) 2345 return -ENOMEM; 2346 WARN_ON_ONCE(!n_stats); 2347 if (copy_from_user(&stats, useraddr, sizeof(stats))) 2348 return -EFAULT; 2349 2350 stats.n_stats = n_stats; 2351 2352 if (n_stats) { 2353 data = vzalloc(array_size(n_stats, sizeof(u64))); 2354 if (!data) 2355 return -ENOMEM; 2356 ops->get_ethtool_stats(dev, &stats, data); 2357 } else { 2358 data = NULL; 2359 } 2360 2361 ret = -EFAULT; 2362 if (copy_to_user(useraddr, &stats, sizeof(stats))) 2363 goto out; 2364 useraddr += sizeof(stats); 2365 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64)))) 2366 goto out; 2367 ret = 0; 2368 2369 out: 2370 vfree(data); 2371 return ret; 2372 } 2373 2374 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data) 2375 { 2376 if (n_stats < 0) 2377 return n_stats; 2378 if (n_stats > S32_MAX / sizeof(u64)) 2379 return -ENOMEM; 2380 if (WARN_ON_ONCE(!n_stats)) 2381 return -EOPNOTSUPP; 2382 2383 *data = vzalloc(array_size(n_stats, sizeof(u64))); 2384 if (!*data) 2385 return -ENOMEM; 2386 2387 return 0; 2388 } 2389 2390 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev, 2391 struct ethtool_stats *stats, 2392 u64 **data) 2393 { 2394 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 2395 int n_stats, ret; 2396 2397 if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats) 2398 return -EOPNOTSUPP; 2399 2400 n_stats = phy_ops->get_sset_count(phydev); 2401 2402 ret = ethtool_vzalloc_stats_array(n_stats, data); 2403 if (ret) 2404 return ret; 2405 2406 stats->n_stats = n_stats; 2407 return phy_ops->get_stats(phydev, stats, *data); 2408 } 2409 2410 static int ethtool_get_phy_stats_ethtool(struct net_device *dev, 2411 struct ethtool_stats *stats, 2412 u64 **data) 2413 { 2414 const struct ethtool_ops *ops = dev->ethtool_ops; 2415 int n_stats, ret; 2416 2417 if (!ops || !ops->get_sset_count || !ops->get_ethtool_phy_stats) 2418 return -EOPNOTSUPP; 2419 2420 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 2421 2422 ret = ethtool_vzalloc_stats_array(n_stats, data); 2423 if (ret) 2424 return ret; 2425 2426 stats->n_stats = n_stats; 2427 ops->get_ethtool_phy_stats(dev, stats, *data); 2428 2429 return 0; 2430 } 2431 2432 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 2433 { 2434 struct phy_device *phydev = dev->phydev; 2435 struct ethtool_stats stats; 2436 u64 *data = NULL; 2437 int ret = -EOPNOTSUPP; 2438 2439 if (copy_from_user(&stats, useraddr, sizeof(stats))) 2440 return -EFAULT; 2441 2442 if (phydev) 2443 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data); 2444 2445 if (ret == -EOPNOTSUPP) 2446 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data); 2447 2448 if (ret) 2449 goto out; 2450 2451 if (copy_to_user(useraddr, &stats, sizeof(stats))) { 2452 ret = -EFAULT; 2453 goto out; 2454 } 2455 2456 useraddr += sizeof(stats); 2457 if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64)))) 2458 ret = -EFAULT; 2459 2460 out: 2461 vfree(data); 2462 return ret; 2463 } 2464 2465 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 2466 { 2467 struct ethtool_perm_addr epaddr; 2468 2469 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 2470 return -EFAULT; 2471 2472 if (epaddr.size < dev->addr_len) 2473 return -ETOOSMALL; 2474 epaddr.size = dev->addr_len; 2475 2476 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 2477 return -EFAULT; 2478 useraddr += sizeof(epaddr); 2479 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 2480 return -EFAULT; 2481 return 0; 2482 } 2483 2484 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 2485 u32 cmd, u32 (*actor)(struct net_device *)) 2486 { 2487 struct ethtool_value edata = { .cmd = cmd }; 2488 2489 if (!actor) 2490 return -EOPNOTSUPP; 2491 2492 edata.data = actor(dev); 2493 2494 if (copy_to_user(useraddr, &edata, sizeof(edata))) 2495 return -EFAULT; 2496 return 0; 2497 } 2498 2499 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 2500 void (*actor)(struct net_device *, u32)) 2501 { 2502 struct ethtool_value edata; 2503 2504 if (!actor) 2505 return -EOPNOTSUPP; 2506 2507 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2508 return -EFAULT; 2509 2510 actor(dev, edata.data); 2511 return 0; 2512 } 2513 2514 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2515 int (*actor)(struct net_device *, u32)) 2516 { 2517 struct ethtool_value edata; 2518 2519 if (!actor) 2520 return -EOPNOTSUPP; 2521 2522 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2523 return -EFAULT; 2524 2525 return actor(dev, edata.data); 2526 } 2527 2528 static int 2529 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req) 2530 { 2531 if (!dev->ethtool_ops->flash_device) { 2532 req->devlink = netdev_to_devlink_get(dev); 2533 return 0; 2534 } 2535 2536 return dev->ethtool_ops->flash_device(dev, &req->efl); 2537 } 2538 2539 static int ethtool_set_dump(struct net_device *dev, 2540 void __user *useraddr) 2541 { 2542 struct ethtool_dump dump; 2543 2544 if (!dev->ethtool_ops->set_dump) 2545 return -EOPNOTSUPP; 2546 2547 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2548 return -EFAULT; 2549 2550 return dev->ethtool_ops->set_dump(dev, &dump); 2551 } 2552 2553 static int ethtool_get_dump_flag(struct net_device *dev, 2554 void __user *useraddr) 2555 { 2556 int ret; 2557 struct ethtool_dump dump; 2558 const struct ethtool_ops *ops = dev->ethtool_ops; 2559 2560 if (!ops->get_dump_flag) 2561 return -EOPNOTSUPP; 2562 2563 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2564 return -EFAULT; 2565 2566 ret = ops->get_dump_flag(dev, &dump); 2567 if (ret) 2568 return ret; 2569 2570 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2571 return -EFAULT; 2572 return 0; 2573 } 2574 2575 static int ethtool_get_dump_data(struct net_device *dev, 2576 void __user *useraddr) 2577 { 2578 int ret; 2579 __u32 len; 2580 struct ethtool_dump dump, tmp; 2581 const struct ethtool_ops *ops = dev->ethtool_ops; 2582 void *data = NULL; 2583 2584 if (!ops->get_dump_data || !ops->get_dump_flag) 2585 return -EOPNOTSUPP; 2586 2587 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2588 return -EFAULT; 2589 2590 memset(&tmp, 0, sizeof(tmp)); 2591 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2592 ret = ops->get_dump_flag(dev, &tmp); 2593 if (ret) 2594 return ret; 2595 2596 len = min(tmp.len, dump.len); 2597 if (!len) 2598 return -EFAULT; 2599 2600 /* Don't ever let the driver think there's more space available 2601 * than it requested with .get_dump_flag(). 2602 */ 2603 dump.len = len; 2604 2605 /* Always allocate enough space to hold the whole thing so that the 2606 * driver does not need to check the length and bother with partial 2607 * dumping. 2608 */ 2609 data = vzalloc(tmp.len); 2610 if (!data) 2611 return -ENOMEM; 2612 ret = ops->get_dump_data(dev, &dump, data); 2613 if (ret) 2614 goto out; 2615 2616 /* There are two sane possibilities: 2617 * 1. The driver's .get_dump_data() does not touch dump.len. 2618 * 2. Or it may set dump.len to how much it really writes, which 2619 * should be tmp.len (or len if it can do a partial dump). 2620 * In any case respond to userspace with the actual length of data 2621 * it's receiving. 2622 */ 2623 WARN_ON(dump.len != len && dump.len != tmp.len); 2624 dump.len = len; 2625 2626 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2627 ret = -EFAULT; 2628 goto out; 2629 } 2630 useraddr += offsetof(struct ethtool_dump, data); 2631 if (copy_to_user(useraddr, data, len)) 2632 ret = -EFAULT; 2633 out: 2634 vfree(data); 2635 return ret; 2636 } 2637 2638 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2639 { 2640 struct kernel_ethtool_ts_info kernel_info; 2641 struct ethtool_ts_info info = {}; 2642 int err; 2643 2644 err = __ethtool_get_ts_info(dev, &kernel_info); 2645 if (err) 2646 return err; 2647 2648 info.cmd = kernel_info.cmd; 2649 info.so_timestamping = kernel_info.so_timestamping; 2650 info.phc_index = kernel_info.phc_index; 2651 info.tx_types = kernel_info.tx_types; 2652 info.rx_filters = kernel_info.rx_filters; 2653 2654 if (copy_to_user(useraddr, &info, sizeof(info))) 2655 return -EFAULT; 2656 2657 return 0; 2658 } 2659 2660 int ethtool_get_module_info_call(struct net_device *dev, 2661 struct ethtool_modinfo *modinfo) 2662 { 2663 const struct ethtool_ops *ops = dev->ethtool_ops; 2664 struct phy_device *phydev = dev->phydev; 2665 2666 if (dev->ethtool->module_fw_flash_in_progress) 2667 return -EBUSY; 2668 2669 if (dev->sfp_bus) 2670 return sfp_get_module_info(dev->sfp_bus, modinfo); 2671 2672 if (phydev && phydev->drv && phydev->drv->module_info) 2673 return phydev->drv->module_info(phydev, modinfo); 2674 2675 if (ops->get_module_info) 2676 return ops->get_module_info(dev, modinfo); 2677 2678 return -EOPNOTSUPP; 2679 } 2680 2681 static int ethtool_get_module_info(struct net_device *dev, 2682 void __user *useraddr) 2683 { 2684 int ret; 2685 struct ethtool_modinfo modinfo; 2686 2687 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2688 return -EFAULT; 2689 2690 ret = ethtool_get_module_info_call(dev, &modinfo); 2691 if (ret) 2692 return ret; 2693 2694 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2695 return -EFAULT; 2696 2697 return 0; 2698 } 2699 2700 int ethtool_get_module_eeprom_call(struct net_device *dev, 2701 struct ethtool_eeprom *ee, u8 *data) 2702 { 2703 const struct ethtool_ops *ops = dev->ethtool_ops; 2704 struct phy_device *phydev = dev->phydev; 2705 2706 if (dev->ethtool->module_fw_flash_in_progress) 2707 return -EBUSY; 2708 2709 if (dev->sfp_bus) 2710 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2711 2712 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2713 return phydev->drv->module_eeprom(phydev, ee, data); 2714 2715 if (ops->get_module_eeprom) 2716 return ops->get_module_eeprom(dev, ee, data); 2717 2718 return -EOPNOTSUPP; 2719 } 2720 2721 static int ethtool_get_module_eeprom(struct net_device *dev, 2722 void __user *useraddr) 2723 { 2724 int ret; 2725 struct ethtool_modinfo modinfo; 2726 2727 ret = ethtool_get_module_info_call(dev, &modinfo); 2728 if (ret) 2729 return ret; 2730 2731 return ethtool_get_any_eeprom(dev, useraddr, 2732 ethtool_get_module_eeprom_call, 2733 modinfo.eeprom_len); 2734 } 2735 2736 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2737 { 2738 switch (tuna->id) { 2739 case ETHTOOL_RX_COPYBREAK: 2740 case ETHTOOL_TX_COPYBREAK: 2741 case ETHTOOL_TX_COPYBREAK_BUF_SIZE: 2742 if (tuna->len != sizeof(u32) || 2743 tuna->type_id != ETHTOOL_TUNABLE_U32) 2744 return -EINVAL; 2745 break; 2746 case ETHTOOL_PFC_PREVENTION_TOUT: 2747 if (tuna->len != sizeof(u16) || 2748 tuna->type_id != ETHTOOL_TUNABLE_U16) 2749 return -EINVAL; 2750 break; 2751 default: 2752 return -EINVAL; 2753 } 2754 2755 return 0; 2756 } 2757 2758 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2759 { 2760 int ret; 2761 struct ethtool_tunable tuna; 2762 const struct ethtool_ops *ops = dev->ethtool_ops; 2763 void *data; 2764 2765 if (!ops->get_tunable) 2766 return -EOPNOTSUPP; 2767 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2768 return -EFAULT; 2769 ret = ethtool_tunable_valid(&tuna); 2770 if (ret) 2771 return ret; 2772 data = kzalloc(tuna.len, GFP_USER); 2773 if (!data) 2774 return -ENOMEM; 2775 ret = ops->get_tunable(dev, &tuna, data); 2776 if (ret) 2777 goto out; 2778 useraddr += sizeof(tuna); 2779 ret = -EFAULT; 2780 if (copy_to_user(useraddr, data, tuna.len)) 2781 goto out; 2782 ret = 0; 2783 2784 out: 2785 kfree(data); 2786 return ret; 2787 } 2788 2789 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2790 { 2791 int ret; 2792 struct ethtool_tunable tuna; 2793 const struct ethtool_ops *ops = dev->ethtool_ops; 2794 void *data; 2795 2796 if (!ops->set_tunable) 2797 return -EOPNOTSUPP; 2798 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2799 return -EFAULT; 2800 ret = ethtool_tunable_valid(&tuna); 2801 if (ret) 2802 return ret; 2803 useraddr += sizeof(tuna); 2804 data = memdup_user(useraddr, tuna.len); 2805 if (IS_ERR(data)) 2806 return PTR_ERR(data); 2807 ret = ops->set_tunable(dev, &tuna, data); 2808 2809 kfree(data); 2810 return ret; 2811 } 2812 2813 static noinline_for_stack int 2814 ethtool_get_per_queue_coalesce(struct net_device *dev, 2815 void __user *useraddr, 2816 struct ethtool_per_queue_op *per_queue_opt) 2817 { 2818 u32 bit; 2819 int ret; 2820 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2821 2822 if (!dev->ethtool_ops->get_per_queue_coalesce) 2823 return -EOPNOTSUPP; 2824 2825 useraddr += sizeof(*per_queue_opt); 2826 2827 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2828 MAX_NUM_QUEUE); 2829 2830 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2831 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2832 2833 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2834 if (ret != 0) 2835 return ret; 2836 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2837 return -EFAULT; 2838 useraddr += sizeof(coalesce); 2839 } 2840 2841 return 0; 2842 } 2843 2844 static noinline_for_stack int 2845 ethtool_set_per_queue_coalesce(struct net_device *dev, 2846 void __user *useraddr, 2847 struct ethtool_per_queue_op *per_queue_opt) 2848 { 2849 u32 bit; 2850 int i, ret = 0; 2851 int n_queue; 2852 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2853 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2854 2855 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2856 (!dev->ethtool_ops->get_per_queue_coalesce)) 2857 return -EOPNOTSUPP; 2858 2859 useraddr += sizeof(*per_queue_opt); 2860 2861 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2862 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2863 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2864 if (!backup) 2865 return -ENOMEM; 2866 2867 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2868 struct ethtool_coalesce coalesce; 2869 2870 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2871 if (ret != 0) 2872 goto roll_back; 2873 2874 tmp++; 2875 2876 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2877 ret = -EFAULT; 2878 goto roll_back; 2879 } 2880 2881 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2882 ret = -EOPNOTSUPP; 2883 goto roll_back; 2884 } 2885 2886 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2887 if (ret != 0) 2888 goto roll_back; 2889 2890 useraddr += sizeof(coalesce); 2891 } 2892 2893 roll_back: 2894 if (ret != 0) { 2895 tmp = backup; 2896 for_each_set_bit(i, queue_mask, bit) { 2897 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2898 tmp++; 2899 } 2900 } 2901 kfree(backup); 2902 2903 return ret; 2904 } 2905 2906 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2907 void __user *useraddr, u32 sub_cmd) 2908 { 2909 struct ethtool_per_queue_op per_queue_opt; 2910 2911 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2912 return -EFAULT; 2913 2914 if (per_queue_opt.sub_command != sub_cmd) 2915 return -EINVAL; 2916 2917 switch (per_queue_opt.sub_command) { 2918 case ETHTOOL_GCOALESCE: 2919 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2920 case ETHTOOL_SCOALESCE: 2921 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2922 default: 2923 return -EOPNOTSUPP; 2924 } 2925 } 2926 2927 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2928 { 2929 switch (tuna->id) { 2930 case ETHTOOL_PHY_DOWNSHIFT: 2931 case ETHTOOL_PHY_FAST_LINK_DOWN: 2932 if (tuna->len != sizeof(u8) || 2933 tuna->type_id != ETHTOOL_TUNABLE_U8) 2934 return -EINVAL; 2935 break; 2936 case ETHTOOL_PHY_EDPD: 2937 if (tuna->len != sizeof(u16) || 2938 tuna->type_id != ETHTOOL_TUNABLE_U16) 2939 return -EINVAL; 2940 break; 2941 default: 2942 return -EINVAL; 2943 } 2944 2945 return 0; 2946 } 2947 2948 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2949 { 2950 struct phy_device *phydev = dev->phydev; 2951 struct ethtool_tunable tuna; 2952 bool phy_drv_tunable; 2953 void *data; 2954 int ret; 2955 2956 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable; 2957 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable) 2958 return -EOPNOTSUPP; 2959 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2960 return -EFAULT; 2961 ret = ethtool_phy_tunable_valid(&tuna); 2962 if (ret) 2963 return ret; 2964 data = kzalloc(tuna.len, GFP_USER); 2965 if (!data) 2966 return -ENOMEM; 2967 if (phy_drv_tunable) { 2968 mutex_lock(&phydev->lock); 2969 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2970 mutex_unlock(&phydev->lock); 2971 } else { 2972 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data); 2973 } 2974 if (ret) 2975 goto out; 2976 useraddr += sizeof(tuna); 2977 ret = -EFAULT; 2978 if (copy_to_user(useraddr, data, tuna.len)) 2979 goto out; 2980 ret = 0; 2981 2982 out: 2983 kfree(data); 2984 return ret; 2985 } 2986 2987 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2988 { 2989 struct phy_device *phydev = dev->phydev; 2990 struct ethtool_tunable tuna; 2991 bool phy_drv_tunable; 2992 void *data; 2993 int ret; 2994 2995 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable; 2996 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable) 2997 return -EOPNOTSUPP; 2998 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2999 return -EFAULT; 3000 ret = ethtool_phy_tunable_valid(&tuna); 3001 if (ret) 3002 return ret; 3003 useraddr += sizeof(tuna); 3004 data = memdup_user(useraddr, tuna.len); 3005 if (IS_ERR(data)) 3006 return PTR_ERR(data); 3007 if (phy_drv_tunable) { 3008 mutex_lock(&phydev->lock); 3009 ret = phydev->drv->set_tunable(phydev, &tuna, data); 3010 mutex_unlock(&phydev->lock); 3011 } else { 3012 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data); 3013 } 3014 3015 kfree(data); 3016 return ret; 3017 } 3018 3019 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 3020 { 3021 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 3022 int rc; 3023 3024 if (!dev->ethtool_ops->get_fecparam) 3025 return -EOPNOTSUPP; 3026 3027 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 3028 if (rc) 3029 return rc; 3030 3031 if (WARN_ON_ONCE(fecparam.reserved)) 3032 fecparam.reserved = 0; 3033 3034 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 3035 return -EFAULT; 3036 return 0; 3037 } 3038 3039 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 3040 { 3041 struct ethtool_fecparam fecparam; 3042 3043 if (!dev->ethtool_ops->set_fecparam) 3044 return -EOPNOTSUPP; 3045 3046 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 3047 return -EFAULT; 3048 3049 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE) 3050 return -EINVAL; 3051 3052 fecparam.active_fec = 0; 3053 fecparam.reserved = 0; 3054 3055 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 3056 } 3057 3058 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 3059 3060 static int 3061 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr, 3062 u32 ethcmd, struct ethtool_devlink_compat *devlink_state) 3063 { 3064 struct net_device *dev; 3065 u32 sub_cmd; 3066 int rc; 3067 netdev_features_t old_features; 3068 3069 dev = __dev_get_by_name(net, ifr->ifr_name); 3070 if (!dev) 3071 return -ENODEV; 3072 3073 if (ethcmd == ETHTOOL_PERQUEUE) { 3074 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 3075 return -EFAULT; 3076 } else { 3077 sub_cmd = ethcmd; 3078 } 3079 /* Allow some commands to be done by anyone */ 3080 switch (sub_cmd) { 3081 case ETHTOOL_GSET: 3082 case ETHTOOL_GDRVINFO: 3083 case ETHTOOL_GMSGLVL: 3084 case ETHTOOL_GLINK: 3085 case ETHTOOL_GCOALESCE: 3086 case ETHTOOL_GRINGPARAM: 3087 case ETHTOOL_GPAUSEPARAM: 3088 case ETHTOOL_GRXCSUM: 3089 case ETHTOOL_GTXCSUM: 3090 case ETHTOOL_GSG: 3091 case ETHTOOL_GSSET_INFO: 3092 case ETHTOOL_GSTRINGS: 3093 case ETHTOOL_GSTATS: 3094 case ETHTOOL_GPHYSTATS: 3095 case ETHTOOL_GTSO: 3096 case ETHTOOL_GPERMADDR: 3097 case ETHTOOL_GUFO: 3098 case ETHTOOL_GGSO: 3099 case ETHTOOL_GGRO: 3100 case ETHTOOL_GFLAGS: 3101 case ETHTOOL_GPFLAGS: 3102 case ETHTOOL_GRXFH: 3103 case ETHTOOL_GRXRINGS: 3104 case ETHTOOL_GRXCLSRLCNT: 3105 case ETHTOOL_GRXCLSRULE: 3106 case ETHTOOL_GRXCLSRLALL: 3107 case ETHTOOL_GRXFHINDIR: 3108 case ETHTOOL_GRSSH: 3109 case ETHTOOL_GFEATURES: 3110 case ETHTOOL_GCHANNELS: 3111 case ETHTOOL_GET_TS_INFO: 3112 case ETHTOOL_GEEE: 3113 case ETHTOOL_GTUNABLE: 3114 case ETHTOOL_PHY_GTUNABLE: 3115 case ETHTOOL_GLINKSETTINGS: 3116 case ETHTOOL_GFECPARAM: 3117 break; 3118 default: 3119 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 3120 return -EPERM; 3121 } 3122 3123 if (dev->dev.parent) 3124 pm_runtime_get_sync(dev->dev.parent); 3125 3126 if (!netif_device_present(dev)) { 3127 rc = -ENODEV; 3128 goto out; 3129 } 3130 3131 if (dev->ethtool_ops->begin) { 3132 rc = dev->ethtool_ops->begin(dev); 3133 if (rc < 0) 3134 goto out; 3135 } 3136 old_features = dev->features; 3137 3138 switch (ethcmd) { 3139 case ETHTOOL_GSET: 3140 rc = ethtool_get_settings(dev, useraddr); 3141 break; 3142 case ETHTOOL_SSET: 3143 rc = ethtool_set_settings(dev, useraddr); 3144 break; 3145 case ETHTOOL_GDRVINFO: 3146 rc = ethtool_get_drvinfo(dev, devlink_state); 3147 break; 3148 case ETHTOOL_GREGS: 3149 rc = ethtool_get_regs(dev, useraddr); 3150 break; 3151 case ETHTOOL_GWOL: 3152 rc = ethtool_get_wol(dev, useraddr); 3153 break; 3154 case ETHTOOL_SWOL: 3155 rc = ethtool_set_wol(dev, useraddr); 3156 break; 3157 case ETHTOOL_GMSGLVL: 3158 rc = ethtool_get_value(dev, useraddr, ethcmd, 3159 dev->ethtool_ops->get_msglevel); 3160 break; 3161 case ETHTOOL_SMSGLVL: 3162 rc = ethtool_set_value_void(dev, useraddr, 3163 dev->ethtool_ops->set_msglevel); 3164 if (!rc) 3165 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 3166 break; 3167 case ETHTOOL_GEEE: 3168 rc = ethtool_get_eee(dev, useraddr); 3169 break; 3170 case ETHTOOL_SEEE: 3171 rc = ethtool_set_eee(dev, useraddr); 3172 break; 3173 case ETHTOOL_NWAY_RST: 3174 rc = ethtool_nway_reset(dev); 3175 break; 3176 case ETHTOOL_GLINK: 3177 rc = ethtool_get_link(dev, useraddr); 3178 break; 3179 case ETHTOOL_GEEPROM: 3180 rc = ethtool_get_eeprom(dev, useraddr); 3181 break; 3182 case ETHTOOL_SEEPROM: 3183 rc = ethtool_set_eeprom(dev, useraddr); 3184 break; 3185 case ETHTOOL_GCOALESCE: 3186 rc = ethtool_get_coalesce(dev, useraddr); 3187 break; 3188 case ETHTOOL_SCOALESCE: 3189 rc = ethtool_set_coalesce(dev, useraddr); 3190 break; 3191 case ETHTOOL_GRINGPARAM: 3192 rc = ethtool_get_ringparam(dev, useraddr); 3193 break; 3194 case ETHTOOL_SRINGPARAM: 3195 rc = ethtool_set_ringparam(dev, useraddr); 3196 break; 3197 case ETHTOOL_GPAUSEPARAM: 3198 rc = ethtool_get_pauseparam(dev, useraddr); 3199 break; 3200 case ETHTOOL_SPAUSEPARAM: 3201 rc = ethtool_set_pauseparam(dev, useraddr); 3202 break; 3203 case ETHTOOL_TEST: 3204 rc = ethtool_self_test(dev, useraddr); 3205 break; 3206 case ETHTOOL_GSTRINGS: 3207 rc = ethtool_get_strings(dev, useraddr); 3208 break; 3209 case ETHTOOL_PHYS_ID: 3210 rc = ethtool_phys_id(dev, useraddr); 3211 break; 3212 case ETHTOOL_GSTATS: 3213 rc = ethtool_get_stats(dev, useraddr); 3214 break; 3215 case ETHTOOL_GPERMADDR: 3216 rc = ethtool_get_perm_addr(dev, useraddr); 3217 break; 3218 case ETHTOOL_GFLAGS: 3219 rc = ethtool_get_value(dev, useraddr, ethcmd, 3220 __ethtool_get_flags); 3221 break; 3222 case ETHTOOL_SFLAGS: 3223 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 3224 break; 3225 case ETHTOOL_GPFLAGS: 3226 rc = ethtool_get_value(dev, useraddr, ethcmd, 3227 dev->ethtool_ops->get_priv_flags); 3228 if (!rc) 3229 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 3230 break; 3231 case ETHTOOL_SPFLAGS: 3232 rc = ethtool_set_value(dev, useraddr, 3233 dev->ethtool_ops->set_priv_flags); 3234 break; 3235 case ETHTOOL_GRXFH: 3236 case ETHTOOL_GRXRINGS: 3237 case ETHTOOL_GRXCLSRLCNT: 3238 case ETHTOOL_GRXCLSRULE: 3239 case ETHTOOL_GRXCLSRLALL: 3240 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 3241 break; 3242 case ETHTOOL_SRXFH: 3243 case ETHTOOL_SRXCLSRLDEL: 3244 case ETHTOOL_SRXCLSRLINS: 3245 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 3246 break; 3247 case ETHTOOL_FLASHDEV: 3248 rc = ethtool_flash_device(dev, devlink_state); 3249 break; 3250 case ETHTOOL_RESET: 3251 rc = ethtool_reset(dev, useraddr); 3252 break; 3253 case ETHTOOL_GSSET_INFO: 3254 rc = ethtool_get_sset_info(dev, useraddr); 3255 break; 3256 case ETHTOOL_GRXFHINDIR: 3257 rc = ethtool_get_rxfh_indir(dev, useraddr); 3258 break; 3259 case ETHTOOL_SRXFHINDIR: 3260 rc = ethtool_set_rxfh_indir(dev, useraddr); 3261 break; 3262 case ETHTOOL_GRSSH: 3263 rc = ethtool_get_rxfh(dev, useraddr); 3264 break; 3265 case ETHTOOL_SRSSH: 3266 rc = ethtool_set_rxfh(dev, useraddr); 3267 break; 3268 case ETHTOOL_GFEATURES: 3269 rc = ethtool_get_features(dev, useraddr); 3270 break; 3271 case ETHTOOL_SFEATURES: 3272 rc = ethtool_set_features(dev, useraddr); 3273 break; 3274 case ETHTOOL_GTXCSUM: 3275 case ETHTOOL_GRXCSUM: 3276 case ETHTOOL_GSG: 3277 case ETHTOOL_GTSO: 3278 case ETHTOOL_GGSO: 3279 case ETHTOOL_GGRO: 3280 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 3281 break; 3282 case ETHTOOL_STXCSUM: 3283 case ETHTOOL_SRXCSUM: 3284 case ETHTOOL_SSG: 3285 case ETHTOOL_STSO: 3286 case ETHTOOL_SGSO: 3287 case ETHTOOL_SGRO: 3288 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 3289 break; 3290 case ETHTOOL_GCHANNELS: 3291 rc = ethtool_get_channels(dev, useraddr); 3292 break; 3293 case ETHTOOL_SCHANNELS: 3294 rc = ethtool_set_channels(dev, useraddr); 3295 break; 3296 case ETHTOOL_SET_DUMP: 3297 rc = ethtool_set_dump(dev, useraddr); 3298 break; 3299 case ETHTOOL_GET_DUMP_FLAG: 3300 rc = ethtool_get_dump_flag(dev, useraddr); 3301 break; 3302 case ETHTOOL_GET_DUMP_DATA: 3303 rc = ethtool_get_dump_data(dev, useraddr); 3304 break; 3305 case ETHTOOL_GET_TS_INFO: 3306 rc = ethtool_get_ts_info(dev, useraddr); 3307 break; 3308 case ETHTOOL_GMODULEINFO: 3309 rc = ethtool_get_module_info(dev, useraddr); 3310 break; 3311 case ETHTOOL_GMODULEEEPROM: 3312 rc = ethtool_get_module_eeprom(dev, useraddr); 3313 break; 3314 case ETHTOOL_GTUNABLE: 3315 rc = ethtool_get_tunable(dev, useraddr); 3316 break; 3317 case ETHTOOL_STUNABLE: 3318 rc = ethtool_set_tunable(dev, useraddr); 3319 break; 3320 case ETHTOOL_GPHYSTATS: 3321 rc = ethtool_get_phy_stats(dev, useraddr); 3322 break; 3323 case ETHTOOL_PERQUEUE: 3324 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 3325 break; 3326 case ETHTOOL_GLINKSETTINGS: 3327 rc = ethtool_get_link_ksettings(dev, useraddr); 3328 break; 3329 case ETHTOOL_SLINKSETTINGS: 3330 rc = ethtool_set_link_ksettings(dev, useraddr); 3331 break; 3332 case ETHTOOL_PHY_GTUNABLE: 3333 rc = get_phy_tunable(dev, useraddr); 3334 break; 3335 case ETHTOOL_PHY_STUNABLE: 3336 rc = set_phy_tunable(dev, useraddr); 3337 break; 3338 case ETHTOOL_GFECPARAM: 3339 rc = ethtool_get_fecparam(dev, useraddr); 3340 break; 3341 case ETHTOOL_SFECPARAM: 3342 rc = ethtool_set_fecparam(dev, useraddr); 3343 break; 3344 default: 3345 rc = -EOPNOTSUPP; 3346 } 3347 3348 if (dev->ethtool_ops->complete) 3349 dev->ethtool_ops->complete(dev); 3350 3351 if (old_features != dev->features) 3352 netdev_features_change(dev); 3353 out: 3354 if (dev->dev.parent) 3355 pm_runtime_put(dev->dev.parent); 3356 3357 return rc; 3358 } 3359 3360 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr) 3361 { 3362 struct ethtool_devlink_compat *state; 3363 u32 ethcmd; 3364 int rc; 3365 3366 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 3367 return -EFAULT; 3368 3369 state = kzalloc(sizeof(*state), GFP_KERNEL); 3370 if (!state) 3371 return -ENOMEM; 3372 3373 switch (ethcmd) { 3374 case ETHTOOL_FLASHDEV: 3375 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) { 3376 rc = -EFAULT; 3377 goto exit_free; 3378 } 3379 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 3380 break; 3381 } 3382 3383 rtnl_lock(); 3384 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state); 3385 rtnl_unlock(); 3386 if (rc) 3387 goto exit_free; 3388 3389 switch (ethcmd) { 3390 case ETHTOOL_FLASHDEV: 3391 if (state->devlink) 3392 rc = devlink_compat_flash_update(state->devlink, 3393 state->efl.data); 3394 break; 3395 case ETHTOOL_GDRVINFO: 3396 if (state->devlink) 3397 devlink_compat_running_version(state->devlink, 3398 state->info.fw_version, 3399 sizeof(state->info.fw_version)); 3400 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) { 3401 rc = -EFAULT; 3402 goto exit_free; 3403 } 3404 break; 3405 } 3406 3407 exit_free: 3408 if (state->devlink) 3409 devlink_put(state->devlink); 3410 kfree(state); 3411 return rc; 3412 } 3413 3414 struct ethtool_rx_flow_key { 3415 struct flow_dissector_key_basic basic; 3416 union { 3417 struct flow_dissector_key_ipv4_addrs ipv4; 3418 struct flow_dissector_key_ipv6_addrs ipv6; 3419 }; 3420 struct flow_dissector_key_ports tp; 3421 struct flow_dissector_key_ip ip; 3422 struct flow_dissector_key_vlan vlan; 3423 struct flow_dissector_key_eth_addrs eth_addrs; 3424 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 3425 3426 struct ethtool_rx_flow_match { 3427 struct flow_dissector dissector; 3428 struct ethtool_rx_flow_key key; 3429 struct ethtool_rx_flow_key mask; 3430 }; 3431 3432 struct ethtool_rx_flow_rule * 3433 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 3434 { 3435 const struct ethtool_rx_flow_spec *fs = input->fs; 3436 struct ethtool_rx_flow_match *match; 3437 struct ethtool_rx_flow_rule *flow; 3438 struct flow_action_entry *act; 3439 3440 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 3441 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 3442 if (!flow) 3443 return ERR_PTR(-ENOMEM); 3444 3445 /* ethtool_rx supports only one single action per rule. */ 3446 flow->rule = flow_rule_alloc(1); 3447 if (!flow->rule) { 3448 kfree(flow); 3449 return ERR_PTR(-ENOMEM); 3450 } 3451 3452 match = (struct ethtool_rx_flow_match *)flow->priv; 3453 flow->rule->match.dissector = &match->dissector; 3454 flow->rule->match.mask = &match->mask; 3455 flow->rule->match.key = &match->key; 3456 3457 match->mask.basic.n_proto = htons(0xffff); 3458 3459 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3460 case ETHER_FLOW: { 3461 const struct ethhdr *ether_spec, *ether_m_spec; 3462 3463 ether_spec = &fs->h_u.ether_spec; 3464 ether_m_spec = &fs->m_u.ether_spec; 3465 3466 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 3467 ether_addr_copy(match->key.eth_addrs.src, 3468 ether_spec->h_source); 3469 ether_addr_copy(match->mask.eth_addrs.src, 3470 ether_m_spec->h_source); 3471 } 3472 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 3473 ether_addr_copy(match->key.eth_addrs.dst, 3474 ether_spec->h_dest); 3475 ether_addr_copy(match->mask.eth_addrs.dst, 3476 ether_m_spec->h_dest); 3477 } 3478 if (ether_m_spec->h_proto) { 3479 match->key.basic.n_proto = ether_spec->h_proto; 3480 match->mask.basic.n_proto = ether_m_spec->h_proto; 3481 } 3482 } 3483 break; 3484 case TCP_V4_FLOW: 3485 case UDP_V4_FLOW: { 3486 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 3487 3488 match->key.basic.n_proto = htons(ETH_P_IP); 3489 3490 v4_spec = &fs->h_u.tcp_ip4_spec; 3491 v4_m_spec = &fs->m_u.tcp_ip4_spec; 3492 3493 if (v4_m_spec->ip4src) { 3494 match->key.ipv4.src = v4_spec->ip4src; 3495 match->mask.ipv4.src = v4_m_spec->ip4src; 3496 } 3497 if (v4_m_spec->ip4dst) { 3498 match->key.ipv4.dst = v4_spec->ip4dst; 3499 match->mask.ipv4.dst = v4_m_spec->ip4dst; 3500 } 3501 if (v4_m_spec->ip4src || 3502 v4_m_spec->ip4dst) { 3503 match->dissector.used_keys |= 3504 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 3505 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 3506 offsetof(struct ethtool_rx_flow_key, ipv4); 3507 } 3508 if (v4_m_spec->psrc) { 3509 match->key.tp.src = v4_spec->psrc; 3510 match->mask.tp.src = v4_m_spec->psrc; 3511 } 3512 if (v4_m_spec->pdst) { 3513 match->key.tp.dst = v4_spec->pdst; 3514 match->mask.tp.dst = v4_m_spec->pdst; 3515 } 3516 if (v4_m_spec->psrc || 3517 v4_m_spec->pdst) { 3518 match->dissector.used_keys |= 3519 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS); 3520 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3521 offsetof(struct ethtool_rx_flow_key, tp); 3522 } 3523 if (v4_m_spec->tos) { 3524 match->key.ip.tos = v4_spec->tos; 3525 match->mask.ip.tos = v4_m_spec->tos; 3526 match->dissector.used_keys |= 3527 BIT(FLOW_DISSECTOR_KEY_IP); 3528 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3529 offsetof(struct ethtool_rx_flow_key, ip); 3530 } 3531 } 3532 break; 3533 case TCP_V6_FLOW: 3534 case UDP_V6_FLOW: { 3535 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 3536 3537 match->key.basic.n_proto = htons(ETH_P_IPV6); 3538 3539 v6_spec = &fs->h_u.tcp_ip6_spec; 3540 v6_m_spec = &fs->m_u.tcp_ip6_spec; 3541 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) { 3542 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 3543 sizeof(match->key.ipv6.src)); 3544 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 3545 sizeof(match->mask.ipv6.src)); 3546 } 3547 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) { 3548 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 3549 sizeof(match->key.ipv6.dst)); 3550 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 3551 sizeof(match->mask.ipv6.dst)); 3552 } 3553 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) || 3554 !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) { 3555 match->dissector.used_keys |= 3556 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 3557 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 3558 offsetof(struct ethtool_rx_flow_key, ipv6); 3559 } 3560 if (v6_m_spec->psrc) { 3561 match->key.tp.src = v6_spec->psrc; 3562 match->mask.tp.src = v6_m_spec->psrc; 3563 } 3564 if (v6_m_spec->pdst) { 3565 match->key.tp.dst = v6_spec->pdst; 3566 match->mask.tp.dst = v6_m_spec->pdst; 3567 } 3568 if (v6_m_spec->psrc || 3569 v6_m_spec->pdst) { 3570 match->dissector.used_keys |= 3571 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS); 3572 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3573 offsetof(struct ethtool_rx_flow_key, tp); 3574 } 3575 if (v6_m_spec->tclass) { 3576 match->key.ip.tos = v6_spec->tclass; 3577 match->mask.ip.tos = v6_m_spec->tclass; 3578 match->dissector.used_keys |= 3579 BIT_ULL(FLOW_DISSECTOR_KEY_IP); 3580 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3581 offsetof(struct ethtool_rx_flow_key, ip); 3582 } 3583 } 3584 break; 3585 default: 3586 ethtool_rx_flow_rule_destroy(flow); 3587 return ERR_PTR(-EINVAL); 3588 } 3589 3590 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3591 case TCP_V4_FLOW: 3592 case TCP_V6_FLOW: 3593 match->key.basic.ip_proto = IPPROTO_TCP; 3594 match->mask.basic.ip_proto = 0xff; 3595 break; 3596 case UDP_V4_FLOW: 3597 case UDP_V6_FLOW: 3598 match->key.basic.ip_proto = IPPROTO_UDP; 3599 match->mask.basic.ip_proto = 0xff; 3600 break; 3601 } 3602 3603 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC); 3604 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3605 offsetof(struct ethtool_rx_flow_key, basic); 3606 3607 if (fs->flow_type & FLOW_EXT) { 3608 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3609 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3610 3611 if (ext_m_spec->vlan_etype) { 3612 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3613 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3614 } 3615 3616 if (ext_m_spec->vlan_tci) { 3617 match->key.vlan.vlan_id = 3618 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3619 match->mask.vlan.vlan_id = 3620 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3621 3622 match->key.vlan.vlan_dei = 3623 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3624 match->mask.vlan.vlan_dei = 3625 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3626 3627 match->key.vlan.vlan_priority = 3628 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3629 match->mask.vlan.vlan_priority = 3630 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3631 } 3632 3633 if (ext_m_spec->vlan_etype || 3634 ext_m_spec->vlan_tci) { 3635 match->dissector.used_keys |= 3636 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN); 3637 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3638 offsetof(struct ethtool_rx_flow_key, vlan); 3639 } 3640 } 3641 if (fs->flow_type & FLOW_MAC_EXT) { 3642 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3643 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3644 3645 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3646 ETH_ALEN); 3647 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3648 ETH_ALEN); 3649 3650 match->dissector.used_keys |= 3651 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3652 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3653 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3654 } 3655 3656 act = &flow->rule->action.entries[0]; 3657 switch (fs->ring_cookie) { 3658 case RX_CLS_FLOW_DISC: 3659 act->id = FLOW_ACTION_DROP; 3660 break; 3661 case RX_CLS_FLOW_WAKE: 3662 act->id = FLOW_ACTION_WAKE; 3663 break; 3664 default: 3665 act->id = FLOW_ACTION_QUEUE; 3666 if (fs->flow_type & FLOW_RSS) 3667 act->queue.ctx = input->rss_ctx; 3668 3669 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3670 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3671 break; 3672 } 3673 3674 return flow; 3675 } 3676 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3677 3678 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3679 { 3680 kfree(flow->rule); 3681 kfree(flow); 3682 } 3683 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3684