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