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_rxfh_param rxfh = {}; 977 struct ethtool_rxnfc info; 978 size_t info_size = sizeof(info); 979 int rc; 980 981 if (!ops->set_rxnfc || !ops->get_rxfh) 982 return -EOPNOTSUPP; 983 984 rc = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr); 985 if (rc) 986 return rc; 987 988 rc = ops->get_rxfh(dev, &rxfh); 989 if (rc) 990 return rc; 991 992 /* Sanity check: if symmetric-xor is set, then: 993 * 1 - no other fields besides IP src/dst and/or L4 src/dst 994 * 2 - If src is set, dst must also be set 995 */ 996 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) && 997 ((info.data & ~(RXH_IP_SRC | RXH_IP_DST | 998 RXH_L4_B_0_1 | RXH_L4_B_2_3)) || 999 (!!(info.data & RXH_IP_SRC) ^ !!(info.data & RXH_IP_DST)) || 1000 (!!(info.data & RXH_L4_B_0_1) ^ !!(info.data & RXH_L4_B_2_3)))) 1001 return -EINVAL; 1002 1003 rc = ops->set_rxnfc(dev, &info); 1004 if (rc) 1005 return rc; 1006 1007 if (cmd == ETHTOOL_SRXCLSRLINS && 1008 ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, NULL)) 1009 return -EFAULT; 1010 1011 return 0; 1012 } 1013 1014 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 1015 u32 cmd, void __user *useraddr) 1016 { 1017 struct ethtool_rxnfc info; 1018 size_t info_size = sizeof(info); 1019 const struct ethtool_ops *ops = dev->ethtool_ops; 1020 int ret; 1021 void *rule_buf = NULL; 1022 1023 if (!ops->get_rxnfc) 1024 return -EOPNOTSUPP; 1025 1026 ret = ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr); 1027 if (ret) 1028 return ret; 1029 1030 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 1031 if (info.rule_cnt > 0) { 1032 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 1033 rule_buf = kcalloc(info.rule_cnt, sizeof(u32), 1034 GFP_USER); 1035 if (!rule_buf) 1036 return -ENOMEM; 1037 } 1038 } 1039 1040 ret = ops->get_rxnfc(dev, &info, rule_buf); 1041 if (ret < 0) 1042 goto err_out; 1043 1044 ret = ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf); 1045 err_out: 1046 kfree(rule_buf); 1047 1048 return ret; 1049 } 1050 1051 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 1052 struct ethtool_rxnfc *rx_rings, 1053 u32 size) 1054 { 1055 int i; 1056 1057 if (copy_from_user(indir, useraddr, array_size(size, sizeof(indir[0])))) 1058 return -EFAULT; 1059 1060 /* Validate ring indices */ 1061 for (i = 0; i < size; i++) 1062 if (indir[i] >= rx_rings->data) 1063 return -EINVAL; 1064 1065 return 0; 1066 } 1067 1068 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; 1069 1070 void netdev_rss_key_fill(void *buffer, size_t len) 1071 { 1072 BUG_ON(len > sizeof(netdev_rss_key)); 1073 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 1074 memcpy(buffer, netdev_rss_key, len); 1075 } 1076 EXPORT_SYMBOL(netdev_rss_key_fill); 1077 1078 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 1079 void __user *useraddr) 1080 { 1081 struct ethtool_rxfh_param rxfh = {}; 1082 u32 user_size; 1083 int ret; 1084 1085 if (!dev->ethtool_ops->get_rxfh_indir_size || 1086 !dev->ethtool_ops->get_rxfh) 1087 return -EOPNOTSUPP; 1088 rxfh.indir_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 1089 if (rxfh.indir_size == 0) 1090 return -EOPNOTSUPP; 1091 1092 if (copy_from_user(&user_size, 1093 useraddr + offsetof(struct ethtool_rxfh_indir, size), 1094 sizeof(user_size))) 1095 return -EFAULT; 1096 1097 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 1098 &rxfh.indir_size, sizeof(rxfh.indir_size))) 1099 return -EFAULT; 1100 1101 /* If the user buffer size is 0, this is just a query for the 1102 * device table size. Otherwise, if it's smaller than the 1103 * device table size it's an error. 1104 */ 1105 if (user_size < rxfh.indir_size) 1106 return user_size == 0 ? 0 : -EINVAL; 1107 1108 rxfh.indir = kcalloc(rxfh.indir_size, sizeof(rxfh.indir[0]), GFP_USER); 1109 if (!rxfh.indir) 1110 return -ENOMEM; 1111 1112 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh); 1113 if (ret) 1114 goto out; 1115 if (copy_to_user(useraddr + 1116 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 1117 rxfh.indir, rxfh.indir_size * sizeof(*rxfh.indir))) 1118 ret = -EFAULT; 1119 1120 out: 1121 kfree(rxfh.indir); 1122 return ret; 1123 } 1124 1125 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 1126 void __user *useraddr) 1127 { 1128 const struct ethtool_ops *ops = dev->ethtool_ops; 1129 struct ethtool_rxfh_param rxfh_dev = {}; 1130 struct netlink_ext_ack *extack = NULL; 1131 struct ethtool_rxnfc rx_rings; 1132 u32 user_size, i; 1133 int ret; 1134 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 1135 1136 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 1137 !ops->get_rxnfc) 1138 return -EOPNOTSUPP; 1139 1140 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev); 1141 if (rxfh_dev.indir_size == 0) 1142 return -EOPNOTSUPP; 1143 1144 if (copy_from_user(&user_size, 1145 useraddr + offsetof(struct ethtool_rxfh_indir, size), 1146 sizeof(user_size))) 1147 return -EFAULT; 1148 1149 if (user_size != 0 && user_size != rxfh_dev.indir_size) 1150 return -EINVAL; 1151 1152 rxfh_dev.indir = kcalloc(rxfh_dev.indir_size, 1153 sizeof(rxfh_dev.indir[0]), GFP_USER); 1154 if (!rxfh_dev.indir) 1155 return -ENOMEM; 1156 1157 rx_rings.cmd = ETHTOOL_GRXRINGS; 1158 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1159 if (ret) 1160 goto out; 1161 1162 if (user_size == 0) { 1163 u32 *indir = rxfh_dev.indir; 1164 1165 for (i = 0; i < rxfh_dev.indir_size; i++) 1166 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1167 } else { 1168 ret = ethtool_copy_validate_indir(rxfh_dev.indir, 1169 useraddr + ringidx_offset, 1170 &rx_rings, 1171 rxfh_dev.indir_size); 1172 if (ret) 1173 goto out; 1174 } 1175 1176 rxfh_dev.hfunc = ETH_RSS_HASH_NO_CHANGE; 1177 ret = ops->set_rxfh(dev, &rxfh_dev, extack); 1178 if (ret) 1179 goto out; 1180 1181 /* indicate whether rxfh was set to default */ 1182 if (user_size == 0) 1183 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1184 else 1185 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1186 1187 out: 1188 kfree(rxfh_dev.indir); 1189 return ret; 1190 } 1191 1192 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 1193 void __user *useraddr) 1194 { 1195 const struct ethtool_ops *ops = dev->ethtool_ops; 1196 struct ethtool_rxfh_param rxfh_dev = {}; 1197 u32 user_indir_size, user_key_size; 1198 struct ethtool_rxfh rxfh; 1199 u32 indir_bytes; 1200 u8 *rss_config; 1201 u32 total_size; 1202 int ret; 1203 1204 if (!ops->get_rxfh) 1205 return -EOPNOTSUPP; 1206 1207 if (ops->get_rxfh_indir_size) 1208 rxfh_dev.indir_size = ops->get_rxfh_indir_size(dev); 1209 if (ops->get_rxfh_key_size) 1210 rxfh_dev.key_size = ops->get_rxfh_key_size(dev); 1211 1212 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1213 return -EFAULT; 1214 user_indir_size = rxfh.indir_size; 1215 user_key_size = rxfh.key_size; 1216 1217 /* Check that reserved fields are 0 for now */ 1218 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) 1219 return -EINVAL; 1220 /* Most drivers don't handle rss_context, check it's 0 as well */ 1221 if (rxfh.rss_context && !ops->cap_rss_ctx_supported) 1222 return -EOPNOTSUPP; 1223 1224 rxfh.indir_size = rxfh_dev.indir_size; 1225 rxfh.key_size = rxfh_dev.key_size; 1226 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1227 return -EFAULT; 1228 1229 if ((user_indir_size && user_indir_size != rxfh_dev.indir_size) || 1230 (user_key_size && user_key_size != rxfh_dev.key_size)) 1231 return -EINVAL; 1232 1233 indir_bytes = user_indir_size * sizeof(rxfh_dev.indir[0]); 1234 total_size = indir_bytes + user_key_size; 1235 rss_config = kzalloc(total_size, GFP_USER); 1236 if (!rss_config) 1237 return -ENOMEM; 1238 1239 if (user_indir_size) 1240 rxfh_dev.indir = (u32 *)rss_config; 1241 1242 if (user_key_size) 1243 rxfh_dev.key = rss_config + indir_bytes; 1244 1245 rxfh_dev.rss_context = rxfh.rss_context; 1246 1247 ret = dev->ethtool_ops->get_rxfh(dev, &rxfh_dev); 1248 if (ret) 1249 goto out; 1250 1251 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1252 &rxfh_dev.hfunc, sizeof(rxfh.hfunc))) { 1253 ret = -EFAULT; 1254 } else if (copy_to_user(useraddr + 1255 offsetof(struct ethtool_rxfh, rss_config[0]), 1256 rss_config, total_size)) { 1257 ret = -EFAULT; 1258 } 1259 out: 1260 kfree(rss_config); 1261 1262 return ret; 1263 } 1264 1265 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1266 void __user *useraddr) 1267 { 1268 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1269 const struct ethtool_ops *ops = dev->ethtool_ops; 1270 u32 dev_indir_size = 0, dev_key_size = 0, i; 1271 struct ethtool_rxfh_param rxfh_dev = {}; 1272 struct netlink_ext_ack *extack = NULL; 1273 struct ethtool_rxnfc rx_rings; 1274 struct ethtool_rxfh rxfh; 1275 u32 indir_bytes = 0; 1276 u8 *rss_config; 1277 int ret; 1278 1279 if (!ops->get_rxnfc || !ops->set_rxfh) 1280 return -EOPNOTSUPP; 1281 1282 if (ops->get_rxfh_indir_size) 1283 dev_indir_size = ops->get_rxfh_indir_size(dev); 1284 if (ops->get_rxfh_key_size) 1285 dev_key_size = ops->get_rxfh_key_size(dev); 1286 1287 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1288 return -EFAULT; 1289 1290 /* Check that reserved fields are 0 for now */ 1291 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd32) 1292 return -EINVAL; 1293 /* Most drivers don't handle rss_context, check it's 0 as well */ 1294 if (rxfh.rss_context && !ops->cap_rss_ctx_supported) 1295 return -EOPNOTSUPP; 1296 /* Check input data transformation capabilities */ 1297 if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) && 1298 !ops->cap_rss_sym_xor_supported) 1299 return -EOPNOTSUPP; 1300 1301 /* If either indir, hash key or function is valid, proceed further. 1302 * Must request at least one change: indir size, hash key or function. 1303 */ 1304 if ((rxfh.indir_size && 1305 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1306 rxfh.indir_size != dev_indir_size) || 1307 (rxfh.key_size && (rxfh.key_size != dev_key_size)) || 1308 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1309 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE)) 1310 return -EINVAL; 1311 1312 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1313 indir_bytes = dev_indir_size * sizeof(rxfh_dev.indir[0]); 1314 1315 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER); 1316 if (!rss_config) 1317 return -ENOMEM; 1318 1319 rx_rings.cmd = ETHTOOL_GRXRINGS; 1320 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1321 if (ret) 1322 goto out; 1323 1324 /* rxfh.indir_size == 0 means reset the indir table to default (master 1325 * context) or delete the context (other RSS contexts). 1326 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1327 */ 1328 if (rxfh.indir_size && 1329 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1330 rxfh_dev.indir = (u32 *)rss_config; 1331 rxfh_dev.indir_size = dev_indir_size; 1332 ret = ethtool_copy_validate_indir(rxfh_dev.indir, 1333 useraddr + rss_cfg_offset, 1334 &rx_rings, 1335 rxfh.indir_size); 1336 if (ret) 1337 goto out; 1338 } else if (rxfh.indir_size == 0) { 1339 if (rxfh.rss_context == 0) { 1340 u32 *indir; 1341 1342 rxfh_dev.indir = (u32 *)rss_config; 1343 rxfh_dev.indir_size = dev_indir_size; 1344 indir = rxfh_dev.indir; 1345 for (i = 0; i < dev_indir_size; i++) 1346 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1347 } else { 1348 rxfh_dev.rss_delete = true; 1349 } 1350 } 1351 1352 if (rxfh.key_size) { 1353 rxfh_dev.key_size = dev_key_size; 1354 rxfh_dev.key = rss_config + indir_bytes; 1355 if (copy_from_user(rxfh_dev.key, 1356 useraddr + rss_cfg_offset + indir_bytes, 1357 rxfh.key_size)) { 1358 ret = -EFAULT; 1359 goto out; 1360 } 1361 } 1362 1363 rxfh_dev.hfunc = rxfh.hfunc; 1364 rxfh_dev.rss_context = rxfh.rss_context; 1365 rxfh_dev.input_xfrm = rxfh.input_xfrm; 1366 1367 ret = ops->set_rxfh(dev, &rxfh_dev, extack); 1368 if (ret) 1369 goto out; 1370 1371 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1372 &rxfh_dev.rss_context, sizeof(rxfh_dev.rss_context))) 1373 ret = -EFAULT; 1374 1375 if (!rxfh_dev.rss_context) { 1376 /* indicate whether rxfh was set to default */ 1377 if (rxfh.indir_size == 0) 1378 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1379 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1380 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1381 } 1382 1383 out: 1384 kfree(rss_config); 1385 return ret; 1386 } 1387 1388 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1389 { 1390 struct ethtool_regs regs; 1391 const struct ethtool_ops *ops = dev->ethtool_ops; 1392 void *regbuf; 1393 int reglen, ret; 1394 1395 if (!ops->get_regs || !ops->get_regs_len) 1396 return -EOPNOTSUPP; 1397 1398 if (copy_from_user(®s, useraddr, sizeof(regs))) 1399 return -EFAULT; 1400 1401 reglen = ops->get_regs_len(dev); 1402 if (reglen <= 0) 1403 return reglen; 1404 1405 if (regs.len > reglen) 1406 regs.len = reglen; 1407 1408 regbuf = vzalloc(reglen); 1409 if (!regbuf) 1410 return -ENOMEM; 1411 1412 if (regs.len < reglen) 1413 reglen = regs.len; 1414 1415 ops->get_regs(dev, ®s, regbuf); 1416 1417 ret = -EFAULT; 1418 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1419 goto out; 1420 useraddr += offsetof(struct ethtool_regs, data); 1421 if (copy_to_user(useraddr, regbuf, reglen)) 1422 goto out; 1423 ret = 0; 1424 1425 out: 1426 vfree(regbuf); 1427 return ret; 1428 } 1429 1430 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1431 { 1432 struct ethtool_value reset; 1433 int ret; 1434 1435 if (!dev->ethtool_ops->reset) 1436 return -EOPNOTSUPP; 1437 1438 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1439 return -EFAULT; 1440 1441 ret = dev->ethtool_ops->reset(dev, &reset.data); 1442 if (ret) 1443 return ret; 1444 1445 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1446 return -EFAULT; 1447 return 0; 1448 } 1449 1450 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1451 { 1452 struct ethtool_wolinfo wol; 1453 1454 if (!dev->ethtool_ops->get_wol) 1455 return -EOPNOTSUPP; 1456 1457 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1458 wol.cmd = ETHTOOL_GWOL; 1459 dev->ethtool_ops->get_wol(dev, &wol); 1460 1461 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1462 return -EFAULT; 1463 return 0; 1464 } 1465 1466 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1467 { 1468 struct ethtool_wolinfo wol, cur_wol; 1469 int ret; 1470 1471 if (!dev->ethtool_ops->get_wol || !dev->ethtool_ops->set_wol) 1472 return -EOPNOTSUPP; 1473 1474 memset(&cur_wol, 0, sizeof(struct ethtool_wolinfo)); 1475 cur_wol.cmd = ETHTOOL_GWOL; 1476 dev->ethtool_ops->get_wol(dev, &cur_wol); 1477 1478 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1479 return -EFAULT; 1480 1481 if (wol.wolopts & ~cur_wol.supported) 1482 return -EINVAL; 1483 1484 if (wol.wolopts == cur_wol.wolopts && 1485 !memcmp(wol.sopass, cur_wol.sopass, sizeof(wol.sopass))) 1486 return 0; 1487 1488 ret = dev->ethtool_ops->set_wol(dev, &wol); 1489 if (ret) 1490 return ret; 1491 1492 dev->wol_enabled = !!wol.wolopts; 1493 ethtool_notify(dev, ETHTOOL_MSG_WOL_NTF, NULL); 1494 1495 return 0; 1496 } 1497 1498 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1499 { 1500 struct ethtool_eee edata; 1501 int rc; 1502 1503 if (!dev->ethtool_ops->get_eee) 1504 return -EOPNOTSUPP; 1505 1506 memset(&edata, 0, sizeof(struct ethtool_eee)); 1507 edata.cmd = ETHTOOL_GEEE; 1508 rc = dev->ethtool_ops->get_eee(dev, &edata); 1509 1510 if (rc) 1511 return rc; 1512 1513 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1514 return -EFAULT; 1515 1516 return 0; 1517 } 1518 1519 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1520 { 1521 struct ethtool_eee edata; 1522 int ret; 1523 1524 if (!dev->ethtool_ops->set_eee) 1525 return -EOPNOTSUPP; 1526 1527 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1528 return -EFAULT; 1529 1530 ret = dev->ethtool_ops->set_eee(dev, &edata); 1531 if (!ret) 1532 ethtool_notify(dev, ETHTOOL_MSG_EEE_NTF, NULL); 1533 return ret; 1534 } 1535 1536 static int ethtool_nway_reset(struct net_device *dev) 1537 { 1538 if (!dev->ethtool_ops->nway_reset) 1539 return -EOPNOTSUPP; 1540 1541 return dev->ethtool_ops->nway_reset(dev); 1542 } 1543 1544 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1545 { 1546 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1547 int link = __ethtool_get_link(dev); 1548 1549 if (link < 0) 1550 return link; 1551 1552 edata.data = link; 1553 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1554 return -EFAULT; 1555 return 0; 1556 } 1557 1558 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1559 int (*getter)(struct net_device *, 1560 struct ethtool_eeprom *, u8 *), 1561 u32 total_len) 1562 { 1563 struct ethtool_eeprom eeprom; 1564 void __user *userbuf = useraddr + sizeof(eeprom); 1565 u32 bytes_remaining; 1566 u8 *data; 1567 int ret = 0; 1568 1569 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1570 return -EFAULT; 1571 1572 /* Check for wrap and zero */ 1573 if (eeprom.offset + eeprom.len <= eeprom.offset) 1574 return -EINVAL; 1575 1576 /* Check for exceeding total eeprom len */ 1577 if (eeprom.offset + eeprom.len > total_len) 1578 return -EINVAL; 1579 1580 data = kzalloc(PAGE_SIZE, GFP_USER); 1581 if (!data) 1582 return -ENOMEM; 1583 1584 bytes_remaining = eeprom.len; 1585 while (bytes_remaining > 0) { 1586 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1587 1588 ret = getter(dev, &eeprom, data); 1589 if (ret) 1590 break; 1591 if (!eeprom.len) { 1592 ret = -EIO; 1593 break; 1594 } 1595 if (copy_to_user(userbuf, data, eeprom.len)) { 1596 ret = -EFAULT; 1597 break; 1598 } 1599 userbuf += eeprom.len; 1600 eeprom.offset += eeprom.len; 1601 bytes_remaining -= eeprom.len; 1602 } 1603 1604 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1605 eeprom.offset -= eeprom.len; 1606 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1607 ret = -EFAULT; 1608 1609 kfree(data); 1610 return ret; 1611 } 1612 1613 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1614 { 1615 const struct ethtool_ops *ops = dev->ethtool_ops; 1616 1617 if (!ops->get_eeprom || !ops->get_eeprom_len || 1618 !ops->get_eeprom_len(dev)) 1619 return -EOPNOTSUPP; 1620 1621 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1622 ops->get_eeprom_len(dev)); 1623 } 1624 1625 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1626 { 1627 struct ethtool_eeprom eeprom; 1628 const struct ethtool_ops *ops = dev->ethtool_ops; 1629 void __user *userbuf = useraddr + sizeof(eeprom); 1630 u32 bytes_remaining; 1631 u8 *data; 1632 int ret = 0; 1633 1634 if (!ops->set_eeprom || !ops->get_eeprom_len || 1635 !ops->get_eeprom_len(dev)) 1636 return -EOPNOTSUPP; 1637 1638 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1639 return -EFAULT; 1640 1641 /* Check for wrap and zero */ 1642 if (eeprom.offset + eeprom.len <= eeprom.offset) 1643 return -EINVAL; 1644 1645 /* Check for exceeding total eeprom len */ 1646 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1647 return -EINVAL; 1648 1649 data = kzalloc(PAGE_SIZE, GFP_USER); 1650 if (!data) 1651 return -ENOMEM; 1652 1653 bytes_remaining = eeprom.len; 1654 while (bytes_remaining > 0) { 1655 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1656 1657 if (copy_from_user(data, userbuf, eeprom.len)) { 1658 ret = -EFAULT; 1659 break; 1660 } 1661 ret = ops->set_eeprom(dev, &eeprom, data); 1662 if (ret) 1663 break; 1664 userbuf += eeprom.len; 1665 eeprom.offset += eeprom.len; 1666 bytes_remaining -= eeprom.len; 1667 } 1668 1669 kfree(data); 1670 return ret; 1671 } 1672 1673 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1674 void __user *useraddr) 1675 { 1676 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1677 struct kernel_ethtool_coalesce kernel_coalesce = {}; 1678 int ret; 1679 1680 if (!dev->ethtool_ops->get_coalesce) 1681 return -EOPNOTSUPP; 1682 1683 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce, 1684 NULL); 1685 if (ret) 1686 return ret; 1687 1688 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1689 return -EFAULT; 1690 return 0; 1691 } 1692 1693 static bool 1694 ethtool_set_coalesce_supported(struct net_device *dev, 1695 struct ethtool_coalesce *coalesce) 1696 { 1697 u32 supported_params = dev->ethtool_ops->supported_coalesce_params; 1698 u32 nonzero_params = 0; 1699 1700 if (coalesce->rx_coalesce_usecs) 1701 nonzero_params |= ETHTOOL_COALESCE_RX_USECS; 1702 if (coalesce->rx_max_coalesced_frames) 1703 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES; 1704 if (coalesce->rx_coalesce_usecs_irq) 1705 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_IRQ; 1706 if (coalesce->rx_max_coalesced_frames_irq) 1707 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ; 1708 if (coalesce->tx_coalesce_usecs) 1709 nonzero_params |= ETHTOOL_COALESCE_TX_USECS; 1710 if (coalesce->tx_max_coalesced_frames) 1711 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES; 1712 if (coalesce->tx_coalesce_usecs_irq) 1713 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_IRQ; 1714 if (coalesce->tx_max_coalesced_frames_irq) 1715 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ; 1716 if (coalesce->stats_block_coalesce_usecs) 1717 nonzero_params |= ETHTOOL_COALESCE_STATS_BLOCK_USECS; 1718 if (coalesce->use_adaptive_rx_coalesce) 1719 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_RX; 1720 if (coalesce->use_adaptive_tx_coalesce) 1721 nonzero_params |= ETHTOOL_COALESCE_USE_ADAPTIVE_TX; 1722 if (coalesce->pkt_rate_low) 1723 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_LOW; 1724 if (coalesce->rx_coalesce_usecs_low) 1725 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_LOW; 1726 if (coalesce->rx_max_coalesced_frames_low) 1727 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_LOW; 1728 if (coalesce->tx_coalesce_usecs_low) 1729 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_LOW; 1730 if (coalesce->tx_max_coalesced_frames_low) 1731 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_LOW; 1732 if (coalesce->pkt_rate_high) 1733 nonzero_params |= ETHTOOL_COALESCE_PKT_RATE_HIGH; 1734 if (coalesce->rx_coalesce_usecs_high) 1735 nonzero_params |= ETHTOOL_COALESCE_RX_USECS_HIGH; 1736 if (coalesce->rx_max_coalesced_frames_high) 1737 nonzero_params |= ETHTOOL_COALESCE_RX_MAX_FRAMES_HIGH; 1738 if (coalesce->tx_coalesce_usecs_high) 1739 nonzero_params |= ETHTOOL_COALESCE_TX_USECS_HIGH; 1740 if (coalesce->tx_max_coalesced_frames_high) 1741 nonzero_params |= ETHTOOL_COALESCE_TX_MAX_FRAMES_HIGH; 1742 if (coalesce->rate_sample_interval) 1743 nonzero_params |= ETHTOOL_COALESCE_RATE_SAMPLE_INTERVAL; 1744 1745 return (supported_params & nonzero_params) == nonzero_params; 1746 } 1747 1748 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1749 void __user *useraddr) 1750 { 1751 struct kernel_ethtool_coalesce kernel_coalesce = {}; 1752 struct ethtool_coalesce coalesce; 1753 int ret; 1754 1755 if (!dev->ethtool_ops->set_coalesce || !dev->ethtool_ops->get_coalesce) 1756 return -EOPNOTSUPP; 1757 1758 ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce, 1759 NULL); 1760 if (ret) 1761 return ret; 1762 1763 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1764 return -EFAULT; 1765 1766 if (!ethtool_set_coalesce_supported(dev, &coalesce)) 1767 return -EOPNOTSUPP; 1768 1769 ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce, 1770 NULL); 1771 if (!ret) 1772 ethtool_notify(dev, ETHTOOL_MSG_COALESCE_NTF, NULL); 1773 return ret; 1774 } 1775 1776 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1777 { 1778 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1779 struct kernel_ethtool_ringparam kernel_ringparam = {}; 1780 1781 if (!dev->ethtool_ops->get_ringparam) 1782 return -EOPNOTSUPP; 1783 1784 dev->ethtool_ops->get_ringparam(dev, &ringparam, 1785 &kernel_ringparam, NULL); 1786 1787 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1788 return -EFAULT; 1789 return 0; 1790 } 1791 1792 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1793 { 1794 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 1795 struct kernel_ethtool_ringparam kernel_ringparam; 1796 int ret; 1797 1798 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 1799 return -EOPNOTSUPP; 1800 1801 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1802 return -EFAULT; 1803 1804 dev->ethtool_ops->get_ringparam(dev, &max, &kernel_ringparam, NULL); 1805 1806 /* ensure new ring parameters are within the maximums */ 1807 if (ringparam.rx_pending > max.rx_max_pending || 1808 ringparam.rx_mini_pending > max.rx_mini_max_pending || 1809 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 1810 ringparam.tx_pending > max.tx_max_pending) 1811 return -EINVAL; 1812 1813 ret = dev->ethtool_ops->set_ringparam(dev, &ringparam, 1814 &kernel_ringparam, NULL); 1815 if (!ret) 1816 ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL); 1817 return ret; 1818 } 1819 1820 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1821 void __user *useraddr) 1822 { 1823 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1824 1825 if (!dev->ethtool_ops->get_channels) 1826 return -EOPNOTSUPP; 1827 1828 dev->ethtool_ops->get_channels(dev, &channels); 1829 1830 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1831 return -EFAULT; 1832 return 0; 1833 } 1834 1835 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1836 void __user *useraddr) 1837 { 1838 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 1839 u16 from_channel, to_channel; 1840 u64 max_rxnfc_in_use; 1841 u32 max_rxfh_in_use; 1842 unsigned int i; 1843 int ret; 1844 1845 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 1846 return -EOPNOTSUPP; 1847 1848 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1849 return -EFAULT; 1850 1851 dev->ethtool_ops->get_channels(dev, &curr); 1852 1853 if (channels.rx_count == curr.rx_count && 1854 channels.tx_count == curr.tx_count && 1855 channels.combined_count == curr.combined_count && 1856 channels.other_count == curr.other_count) 1857 return 0; 1858 1859 /* ensure new counts are within the maximums */ 1860 if (channels.rx_count > curr.max_rx || 1861 channels.tx_count > curr.max_tx || 1862 channels.combined_count > curr.max_combined || 1863 channels.other_count > curr.max_other) 1864 return -EINVAL; 1865 1866 /* ensure there is at least one RX and one TX channel */ 1867 if (!channels.combined_count && 1868 (!channels.rx_count || !channels.tx_count)) 1869 return -EINVAL; 1870 1871 /* ensure the new Rx count fits within the configured Rx flow 1872 * indirection table/rxnfc settings */ 1873 if (ethtool_get_max_rxnfc_channel(dev, &max_rxnfc_in_use)) 1874 max_rxnfc_in_use = 0; 1875 if (!netif_is_rxfh_configured(dev) || 1876 ethtool_get_max_rxfh_channel(dev, &max_rxfh_in_use)) 1877 max_rxfh_in_use = 0; 1878 if (channels.combined_count + channels.rx_count <= 1879 max_t(u64, max_rxnfc_in_use, max_rxfh_in_use)) 1880 return -EINVAL; 1881 1882 /* Disabling channels, query zero-copy AF_XDP sockets */ 1883 from_channel = channels.combined_count + 1884 min(channels.rx_count, channels.tx_count); 1885 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 1886 for (i = from_channel; i < to_channel; i++) 1887 if (xsk_get_pool_from_qid(dev, i)) 1888 return -EINVAL; 1889 1890 ret = dev->ethtool_ops->set_channels(dev, &channels); 1891 if (!ret) 1892 ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL); 1893 return ret; 1894 } 1895 1896 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1897 { 1898 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 1899 1900 if (!dev->ethtool_ops->get_pauseparam) 1901 return -EOPNOTSUPP; 1902 1903 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1904 1905 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1906 return -EFAULT; 1907 return 0; 1908 } 1909 1910 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1911 { 1912 struct ethtool_pauseparam pauseparam; 1913 int ret; 1914 1915 if (!dev->ethtool_ops->set_pauseparam) 1916 return -EOPNOTSUPP; 1917 1918 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1919 return -EFAULT; 1920 1921 ret = dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1922 if (!ret) 1923 ethtool_notify(dev, ETHTOOL_MSG_PAUSE_NTF, NULL); 1924 return ret; 1925 } 1926 1927 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1928 { 1929 struct ethtool_test test; 1930 const struct ethtool_ops *ops = dev->ethtool_ops; 1931 u64 *data; 1932 int ret, test_len; 1933 1934 if (!ops->self_test || !ops->get_sset_count) 1935 return -EOPNOTSUPP; 1936 1937 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1938 if (test_len < 0) 1939 return test_len; 1940 WARN_ON(test_len == 0); 1941 1942 if (copy_from_user(&test, useraddr, sizeof(test))) 1943 return -EFAULT; 1944 1945 test.len = test_len; 1946 data = kcalloc(test_len, sizeof(u64), GFP_USER); 1947 if (!data) 1948 return -ENOMEM; 1949 1950 netif_testing_on(dev); 1951 ops->self_test(dev, &test, data); 1952 netif_testing_off(dev); 1953 1954 ret = -EFAULT; 1955 if (copy_to_user(useraddr, &test, sizeof(test))) 1956 goto out; 1957 useraddr += sizeof(test); 1958 if (copy_to_user(useraddr, data, array_size(test.len, sizeof(u64)))) 1959 goto out; 1960 ret = 0; 1961 1962 out: 1963 kfree(data); 1964 return ret; 1965 } 1966 1967 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1968 { 1969 struct ethtool_gstrings gstrings; 1970 u8 *data; 1971 int ret; 1972 1973 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1974 return -EFAULT; 1975 1976 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1977 if (ret < 0) 1978 return ret; 1979 if (ret > S32_MAX / ETH_GSTRING_LEN) 1980 return -ENOMEM; 1981 WARN_ON_ONCE(!ret); 1982 1983 gstrings.len = ret; 1984 1985 if (gstrings.len) { 1986 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 1987 if (!data) 1988 return -ENOMEM; 1989 1990 __ethtool_get_strings(dev, gstrings.string_set, data); 1991 } else { 1992 data = NULL; 1993 } 1994 1995 ret = -EFAULT; 1996 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1997 goto out; 1998 useraddr += sizeof(gstrings); 1999 if (gstrings.len && 2000 copy_to_user(useraddr, data, 2001 array_size(gstrings.len, ETH_GSTRING_LEN))) 2002 goto out; 2003 ret = 0; 2004 2005 out: 2006 vfree(data); 2007 return ret; 2008 } 2009 2010 __printf(2, 3) void ethtool_sprintf(u8 **data, const char *fmt, ...) 2011 { 2012 va_list args; 2013 2014 va_start(args, fmt); 2015 vsnprintf(*data, ETH_GSTRING_LEN, fmt, args); 2016 va_end(args); 2017 2018 *data += ETH_GSTRING_LEN; 2019 } 2020 EXPORT_SYMBOL(ethtool_sprintf); 2021 2022 void ethtool_puts(u8 **data, const char *str) 2023 { 2024 strscpy(*data, str, ETH_GSTRING_LEN); 2025 *data += ETH_GSTRING_LEN; 2026 } 2027 EXPORT_SYMBOL(ethtool_puts); 2028 2029 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 2030 { 2031 struct ethtool_value id; 2032 static bool busy; 2033 const struct ethtool_ops *ops = dev->ethtool_ops; 2034 netdevice_tracker dev_tracker; 2035 int rc; 2036 2037 if (!ops->set_phys_id) 2038 return -EOPNOTSUPP; 2039 2040 if (busy) 2041 return -EBUSY; 2042 2043 if (copy_from_user(&id, useraddr, sizeof(id))) 2044 return -EFAULT; 2045 2046 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 2047 if (rc < 0) 2048 return rc; 2049 2050 /* Drop the RTNL lock while waiting, but prevent reentry or 2051 * removal of the device. 2052 */ 2053 busy = true; 2054 netdev_hold(dev, &dev_tracker, GFP_KERNEL); 2055 rtnl_unlock(); 2056 2057 if (rc == 0) { 2058 /* Driver will handle this itself */ 2059 schedule_timeout_interruptible( 2060 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 2061 } else { 2062 /* Driver expects to be called at twice the frequency in rc */ 2063 int n = rc * 2, interval = HZ / n; 2064 u64 count = mul_u32_u32(n, id.data); 2065 u64 i = 0; 2066 2067 do { 2068 rtnl_lock(); 2069 rc = ops->set_phys_id(dev, 2070 (i++ & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 2071 rtnl_unlock(); 2072 if (rc) 2073 break; 2074 schedule_timeout_interruptible(interval); 2075 } while (!signal_pending(current) && (!id.data || i < count)); 2076 } 2077 2078 rtnl_lock(); 2079 netdev_put(dev, &dev_tracker); 2080 busy = false; 2081 2082 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 2083 return rc; 2084 } 2085 2086 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 2087 { 2088 struct ethtool_stats stats; 2089 const struct ethtool_ops *ops = dev->ethtool_ops; 2090 u64 *data; 2091 int ret, n_stats; 2092 2093 if (!ops->get_ethtool_stats || !ops->get_sset_count) 2094 return -EOPNOTSUPP; 2095 2096 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 2097 if (n_stats < 0) 2098 return n_stats; 2099 if (n_stats > S32_MAX / sizeof(u64)) 2100 return -ENOMEM; 2101 WARN_ON_ONCE(!n_stats); 2102 if (copy_from_user(&stats, useraddr, sizeof(stats))) 2103 return -EFAULT; 2104 2105 stats.n_stats = n_stats; 2106 2107 if (n_stats) { 2108 data = vzalloc(array_size(n_stats, sizeof(u64))); 2109 if (!data) 2110 return -ENOMEM; 2111 ops->get_ethtool_stats(dev, &stats, data); 2112 } else { 2113 data = NULL; 2114 } 2115 2116 ret = -EFAULT; 2117 if (copy_to_user(useraddr, &stats, sizeof(stats))) 2118 goto out; 2119 useraddr += sizeof(stats); 2120 if (n_stats && copy_to_user(useraddr, data, array_size(n_stats, sizeof(u64)))) 2121 goto out; 2122 ret = 0; 2123 2124 out: 2125 vfree(data); 2126 return ret; 2127 } 2128 2129 static int ethtool_vzalloc_stats_array(int n_stats, u64 **data) 2130 { 2131 if (n_stats < 0) 2132 return n_stats; 2133 if (n_stats > S32_MAX / sizeof(u64)) 2134 return -ENOMEM; 2135 if (WARN_ON_ONCE(!n_stats)) 2136 return -EOPNOTSUPP; 2137 2138 *data = vzalloc(array_size(n_stats, sizeof(u64))); 2139 if (!*data) 2140 return -ENOMEM; 2141 2142 return 0; 2143 } 2144 2145 static int ethtool_get_phy_stats_phydev(struct phy_device *phydev, 2146 struct ethtool_stats *stats, 2147 u64 **data) 2148 { 2149 const struct ethtool_phy_ops *phy_ops = ethtool_phy_ops; 2150 int n_stats, ret; 2151 2152 if (!phy_ops || !phy_ops->get_sset_count || !phy_ops->get_stats) 2153 return -EOPNOTSUPP; 2154 2155 n_stats = phy_ops->get_sset_count(phydev); 2156 2157 ret = ethtool_vzalloc_stats_array(n_stats, data); 2158 if (ret) 2159 return ret; 2160 2161 stats->n_stats = n_stats; 2162 return phy_ops->get_stats(phydev, stats, *data); 2163 } 2164 2165 static int ethtool_get_phy_stats_ethtool(struct net_device *dev, 2166 struct ethtool_stats *stats, 2167 u64 **data) 2168 { 2169 const struct ethtool_ops *ops = dev->ethtool_ops; 2170 int n_stats, ret; 2171 2172 if (!ops || !ops->get_sset_count || ops->get_ethtool_phy_stats) 2173 return -EOPNOTSUPP; 2174 2175 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 2176 2177 ret = ethtool_vzalloc_stats_array(n_stats, data); 2178 if (ret) 2179 return ret; 2180 2181 stats->n_stats = n_stats; 2182 ops->get_ethtool_phy_stats(dev, stats, *data); 2183 2184 return 0; 2185 } 2186 2187 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 2188 { 2189 struct phy_device *phydev = dev->phydev; 2190 struct ethtool_stats stats; 2191 u64 *data = NULL; 2192 int ret = -EOPNOTSUPP; 2193 2194 if (copy_from_user(&stats, useraddr, sizeof(stats))) 2195 return -EFAULT; 2196 2197 if (phydev) 2198 ret = ethtool_get_phy_stats_phydev(phydev, &stats, &data); 2199 2200 if (ret == -EOPNOTSUPP) 2201 ret = ethtool_get_phy_stats_ethtool(dev, &stats, &data); 2202 2203 if (ret) 2204 goto out; 2205 2206 if (copy_to_user(useraddr, &stats, sizeof(stats))) { 2207 ret = -EFAULT; 2208 goto out; 2209 } 2210 2211 useraddr += sizeof(stats); 2212 if (copy_to_user(useraddr, data, array_size(stats.n_stats, sizeof(u64)))) 2213 ret = -EFAULT; 2214 2215 out: 2216 vfree(data); 2217 return ret; 2218 } 2219 2220 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 2221 { 2222 struct ethtool_perm_addr epaddr; 2223 2224 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 2225 return -EFAULT; 2226 2227 if (epaddr.size < dev->addr_len) 2228 return -ETOOSMALL; 2229 epaddr.size = dev->addr_len; 2230 2231 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 2232 return -EFAULT; 2233 useraddr += sizeof(epaddr); 2234 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 2235 return -EFAULT; 2236 return 0; 2237 } 2238 2239 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 2240 u32 cmd, u32 (*actor)(struct net_device *)) 2241 { 2242 struct ethtool_value edata = { .cmd = cmd }; 2243 2244 if (!actor) 2245 return -EOPNOTSUPP; 2246 2247 edata.data = actor(dev); 2248 2249 if (copy_to_user(useraddr, &edata, sizeof(edata))) 2250 return -EFAULT; 2251 return 0; 2252 } 2253 2254 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 2255 void (*actor)(struct net_device *, u32)) 2256 { 2257 struct ethtool_value edata; 2258 2259 if (!actor) 2260 return -EOPNOTSUPP; 2261 2262 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2263 return -EFAULT; 2264 2265 actor(dev, edata.data); 2266 return 0; 2267 } 2268 2269 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 2270 int (*actor)(struct net_device *, u32)) 2271 { 2272 struct ethtool_value edata; 2273 2274 if (!actor) 2275 return -EOPNOTSUPP; 2276 2277 if (copy_from_user(&edata, useraddr, sizeof(edata))) 2278 return -EFAULT; 2279 2280 return actor(dev, edata.data); 2281 } 2282 2283 static int 2284 ethtool_flash_device(struct net_device *dev, struct ethtool_devlink_compat *req) 2285 { 2286 if (!dev->ethtool_ops->flash_device) { 2287 req->devlink = netdev_to_devlink_get(dev); 2288 return 0; 2289 } 2290 2291 return dev->ethtool_ops->flash_device(dev, &req->efl); 2292 } 2293 2294 static int ethtool_set_dump(struct net_device *dev, 2295 void __user *useraddr) 2296 { 2297 struct ethtool_dump dump; 2298 2299 if (!dev->ethtool_ops->set_dump) 2300 return -EOPNOTSUPP; 2301 2302 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2303 return -EFAULT; 2304 2305 return dev->ethtool_ops->set_dump(dev, &dump); 2306 } 2307 2308 static int ethtool_get_dump_flag(struct net_device *dev, 2309 void __user *useraddr) 2310 { 2311 int ret; 2312 struct ethtool_dump dump; 2313 const struct ethtool_ops *ops = dev->ethtool_ops; 2314 2315 if (!ops->get_dump_flag) 2316 return -EOPNOTSUPP; 2317 2318 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2319 return -EFAULT; 2320 2321 ret = ops->get_dump_flag(dev, &dump); 2322 if (ret) 2323 return ret; 2324 2325 if (copy_to_user(useraddr, &dump, sizeof(dump))) 2326 return -EFAULT; 2327 return 0; 2328 } 2329 2330 static int ethtool_get_dump_data(struct net_device *dev, 2331 void __user *useraddr) 2332 { 2333 int ret; 2334 __u32 len; 2335 struct ethtool_dump dump, tmp; 2336 const struct ethtool_ops *ops = dev->ethtool_ops; 2337 void *data = NULL; 2338 2339 if (!ops->get_dump_data || !ops->get_dump_flag) 2340 return -EOPNOTSUPP; 2341 2342 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2343 return -EFAULT; 2344 2345 memset(&tmp, 0, sizeof(tmp)); 2346 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2347 ret = ops->get_dump_flag(dev, &tmp); 2348 if (ret) 2349 return ret; 2350 2351 len = min(tmp.len, dump.len); 2352 if (!len) 2353 return -EFAULT; 2354 2355 /* Don't ever let the driver think there's more space available 2356 * than it requested with .get_dump_flag(). 2357 */ 2358 dump.len = len; 2359 2360 /* Always allocate enough space to hold the whole thing so that the 2361 * driver does not need to check the length and bother with partial 2362 * dumping. 2363 */ 2364 data = vzalloc(tmp.len); 2365 if (!data) 2366 return -ENOMEM; 2367 ret = ops->get_dump_data(dev, &dump, data); 2368 if (ret) 2369 goto out; 2370 2371 /* There are two sane possibilities: 2372 * 1. The driver's .get_dump_data() does not touch dump.len. 2373 * 2. Or it may set dump.len to how much it really writes, which 2374 * should be tmp.len (or len if it can do a partial dump). 2375 * In any case respond to userspace with the actual length of data 2376 * it's receiving. 2377 */ 2378 WARN_ON(dump.len != len && dump.len != tmp.len); 2379 dump.len = len; 2380 2381 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2382 ret = -EFAULT; 2383 goto out; 2384 } 2385 useraddr += offsetof(struct ethtool_dump, data); 2386 if (copy_to_user(useraddr, data, len)) 2387 ret = -EFAULT; 2388 out: 2389 vfree(data); 2390 return ret; 2391 } 2392 2393 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2394 { 2395 struct ethtool_ts_info info; 2396 int err; 2397 2398 err = __ethtool_get_ts_info(dev, &info); 2399 if (err) 2400 return err; 2401 2402 if (copy_to_user(useraddr, &info, sizeof(info))) 2403 return -EFAULT; 2404 2405 return 0; 2406 } 2407 2408 int ethtool_get_module_info_call(struct net_device *dev, 2409 struct ethtool_modinfo *modinfo) 2410 { 2411 const struct ethtool_ops *ops = dev->ethtool_ops; 2412 struct phy_device *phydev = dev->phydev; 2413 2414 if (dev->sfp_bus) 2415 return sfp_get_module_info(dev->sfp_bus, modinfo); 2416 2417 if (phydev && phydev->drv && phydev->drv->module_info) 2418 return phydev->drv->module_info(phydev, modinfo); 2419 2420 if (ops->get_module_info) 2421 return ops->get_module_info(dev, modinfo); 2422 2423 return -EOPNOTSUPP; 2424 } 2425 2426 static int ethtool_get_module_info(struct net_device *dev, 2427 void __user *useraddr) 2428 { 2429 int ret; 2430 struct ethtool_modinfo modinfo; 2431 2432 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2433 return -EFAULT; 2434 2435 ret = ethtool_get_module_info_call(dev, &modinfo); 2436 if (ret) 2437 return ret; 2438 2439 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2440 return -EFAULT; 2441 2442 return 0; 2443 } 2444 2445 int ethtool_get_module_eeprom_call(struct net_device *dev, 2446 struct ethtool_eeprom *ee, u8 *data) 2447 { 2448 const struct ethtool_ops *ops = dev->ethtool_ops; 2449 struct phy_device *phydev = dev->phydev; 2450 2451 if (dev->sfp_bus) 2452 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2453 2454 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2455 return phydev->drv->module_eeprom(phydev, ee, data); 2456 2457 if (ops->get_module_eeprom) 2458 return ops->get_module_eeprom(dev, ee, data); 2459 2460 return -EOPNOTSUPP; 2461 } 2462 2463 static int ethtool_get_module_eeprom(struct net_device *dev, 2464 void __user *useraddr) 2465 { 2466 int ret; 2467 struct ethtool_modinfo modinfo; 2468 2469 ret = ethtool_get_module_info_call(dev, &modinfo); 2470 if (ret) 2471 return ret; 2472 2473 return ethtool_get_any_eeprom(dev, useraddr, 2474 ethtool_get_module_eeprom_call, 2475 modinfo.eeprom_len); 2476 } 2477 2478 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2479 { 2480 switch (tuna->id) { 2481 case ETHTOOL_RX_COPYBREAK: 2482 case ETHTOOL_TX_COPYBREAK: 2483 case ETHTOOL_TX_COPYBREAK_BUF_SIZE: 2484 if (tuna->len != sizeof(u32) || 2485 tuna->type_id != ETHTOOL_TUNABLE_U32) 2486 return -EINVAL; 2487 break; 2488 case ETHTOOL_PFC_PREVENTION_TOUT: 2489 if (tuna->len != sizeof(u16) || 2490 tuna->type_id != ETHTOOL_TUNABLE_U16) 2491 return -EINVAL; 2492 break; 2493 default: 2494 return -EINVAL; 2495 } 2496 2497 return 0; 2498 } 2499 2500 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2501 { 2502 int ret; 2503 struct ethtool_tunable tuna; 2504 const struct ethtool_ops *ops = dev->ethtool_ops; 2505 void *data; 2506 2507 if (!ops->get_tunable) 2508 return -EOPNOTSUPP; 2509 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2510 return -EFAULT; 2511 ret = ethtool_tunable_valid(&tuna); 2512 if (ret) 2513 return ret; 2514 data = kzalloc(tuna.len, GFP_USER); 2515 if (!data) 2516 return -ENOMEM; 2517 ret = ops->get_tunable(dev, &tuna, data); 2518 if (ret) 2519 goto out; 2520 useraddr += sizeof(tuna); 2521 ret = -EFAULT; 2522 if (copy_to_user(useraddr, data, tuna.len)) 2523 goto out; 2524 ret = 0; 2525 2526 out: 2527 kfree(data); 2528 return ret; 2529 } 2530 2531 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2532 { 2533 int ret; 2534 struct ethtool_tunable tuna; 2535 const struct ethtool_ops *ops = dev->ethtool_ops; 2536 void *data; 2537 2538 if (!ops->set_tunable) 2539 return -EOPNOTSUPP; 2540 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2541 return -EFAULT; 2542 ret = ethtool_tunable_valid(&tuna); 2543 if (ret) 2544 return ret; 2545 useraddr += sizeof(tuna); 2546 data = memdup_user(useraddr, tuna.len); 2547 if (IS_ERR(data)) 2548 return PTR_ERR(data); 2549 ret = ops->set_tunable(dev, &tuna, data); 2550 2551 kfree(data); 2552 return ret; 2553 } 2554 2555 static noinline_for_stack int 2556 ethtool_get_per_queue_coalesce(struct net_device *dev, 2557 void __user *useraddr, 2558 struct ethtool_per_queue_op *per_queue_opt) 2559 { 2560 u32 bit; 2561 int ret; 2562 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2563 2564 if (!dev->ethtool_ops->get_per_queue_coalesce) 2565 return -EOPNOTSUPP; 2566 2567 useraddr += sizeof(*per_queue_opt); 2568 2569 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2570 MAX_NUM_QUEUE); 2571 2572 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2573 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2574 2575 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2576 if (ret != 0) 2577 return ret; 2578 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2579 return -EFAULT; 2580 useraddr += sizeof(coalesce); 2581 } 2582 2583 return 0; 2584 } 2585 2586 static noinline_for_stack int 2587 ethtool_set_per_queue_coalesce(struct net_device *dev, 2588 void __user *useraddr, 2589 struct ethtool_per_queue_op *per_queue_opt) 2590 { 2591 u32 bit; 2592 int i, ret = 0; 2593 int n_queue; 2594 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2595 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2596 2597 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2598 (!dev->ethtool_ops->get_per_queue_coalesce)) 2599 return -EOPNOTSUPP; 2600 2601 useraddr += sizeof(*per_queue_opt); 2602 2603 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2604 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2605 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2606 if (!backup) 2607 return -ENOMEM; 2608 2609 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2610 struct ethtool_coalesce coalesce; 2611 2612 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2613 if (ret != 0) 2614 goto roll_back; 2615 2616 tmp++; 2617 2618 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2619 ret = -EFAULT; 2620 goto roll_back; 2621 } 2622 2623 if (!ethtool_set_coalesce_supported(dev, &coalesce)) { 2624 ret = -EOPNOTSUPP; 2625 goto roll_back; 2626 } 2627 2628 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2629 if (ret != 0) 2630 goto roll_back; 2631 2632 useraddr += sizeof(coalesce); 2633 } 2634 2635 roll_back: 2636 if (ret != 0) { 2637 tmp = backup; 2638 for_each_set_bit(i, queue_mask, bit) { 2639 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2640 tmp++; 2641 } 2642 } 2643 kfree(backup); 2644 2645 return ret; 2646 } 2647 2648 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2649 void __user *useraddr, u32 sub_cmd) 2650 { 2651 struct ethtool_per_queue_op per_queue_opt; 2652 2653 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2654 return -EFAULT; 2655 2656 if (per_queue_opt.sub_command != sub_cmd) 2657 return -EINVAL; 2658 2659 switch (per_queue_opt.sub_command) { 2660 case ETHTOOL_GCOALESCE: 2661 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2662 case ETHTOOL_SCOALESCE: 2663 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2664 default: 2665 return -EOPNOTSUPP; 2666 } 2667 } 2668 2669 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2670 { 2671 switch (tuna->id) { 2672 case ETHTOOL_PHY_DOWNSHIFT: 2673 case ETHTOOL_PHY_FAST_LINK_DOWN: 2674 if (tuna->len != sizeof(u8) || 2675 tuna->type_id != ETHTOOL_TUNABLE_U8) 2676 return -EINVAL; 2677 break; 2678 case ETHTOOL_PHY_EDPD: 2679 if (tuna->len != sizeof(u16) || 2680 tuna->type_id != ETHTOOL_TUNABLE_U16) 2681 return -EINVAL; 2682 break; 2683 default: 2684 return -EINVAL; 2685 } 2686 2687 return 0; 2688 } 2689 2690 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2691 { 2692 struct phy_device *phydev = dev->phydev; 2693 struct ethtool_tunable tuna; 2694 bool phy_drv_tunable; 2695 void *data; 2696 int ret; 2697 2698 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable; 2699 if (!phy_drv_tunable && !dev->ethtool_ops->get_phy_tunable) 2700 return -EOPNOTSUPP; 2701 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2702 return -EFAULT; 2703 ret = ethtool_phy_tunable_valid(&tuna); 2704 if (ret) 2705 return ret; 2706 data = kzalloc(tuna.len, GFP_USER); 2707 if (!data) 2708 return -ENOMEM; 2709 if (phy_drv_tunable) { 2710 mutex_lock(&phydev->lock); 2711 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2712 mutex_unlock(&phydev->lock); 2713 } else { 2714 ret = dev->ethtool_ops->get_phy_tunable(dev, &tuna, data); 2715 } 2716 if (ret) 2717 goto out; 2718 useraddr += sizeof(tuna); 2719 ret = -EFAULT; 2720 if (copy_to_user(useraddr, data, tuna.len)) 2721 goto out; 2722 ret = 0; 2723 2724 out: 2725 kfree(data); 2726 return ret; 2727 } 2728 2729 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2730 { 2731 struct phy_device *phydev = dev->phydev; 2732 struct ethtool_tunable tuna; 2733 bool phy_drv_tunable; 2734 void *data; 2735 int ret; 2736 2737 phy_drv_tunable = phydev && phydev->drv && phydev->drv->get_tunable; 2738 if (!phy_drv_tunable && !dev->ethtool_ops->set_phy_tunable) 2739 return -EOPNOTSUPP; 2740 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2741 return -EFAULT; 2742 ret = ethtool_phy_tunable_valid(&tuna); 2743 if (ret) 2744 return ret; 2745 useraddr += sizeof(tuna); 2746 data = memdup_user(useraddr, tuna.len); 2747 if (IS_ERR(data)) 2748 return PTR_ERR(data); 2749 if (phy_drv_tunable) { 2750 mutex_lock(&phydev->lock); 2751 ret = phydev->drv->set_tunable(phydev, &tuna, data); 2752 mutex_unlock(&phydev->lock); 2753 } else { 2754 ret = dev->ethtool_ops->set_phy_tunable(dev, &tuna, data); 2755 } 2756 2757 kfree(data); 2758 return ret; 2759 } 2760 2761 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 2762 { 2763 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 2764 int rc; 2765 2766 if (!dev->ethtool_ops->get_fecparam) 2767 return -EOPNOTSUPP; 2768 2769 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 2770 if (rc) 2771 return rc; 2772 2773 if (WARN_ON_ONCE(fecparam.reserved)) 2774 fecparam.reserved = 0; 2775 2776 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 2777 return -EFAULT; 2778 return 0; 2779 } 2780 2781 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 2782 { 2783 struct ethtool_fecparam fecparam; 2784 2785 if (!dev->ethtool_ops->set_fecparam) 2786 return -EOPNOTSUPP; 2787 2788 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 2789 return -EFAULT; 2790 2791 if (!fecparam.fec || fecparam.fec & ETHTOOL_FEC_NONE) 2792 return -EINVAL; 2793 2794 fecparam.active_fec = 0; 2795 fecparam.reserved = 0; 2796 2797 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 2798 } 2799 2800 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 2801 2802 static int 2803 __dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr, 2804 u32 ethcmd, struct ethtool_devlink_compat *devlink_state) 2805 { 2806 struct net_device *dev; 2807 u32 sub_cmd; 2808 int rc; 2809 netdev_features_t old_features; 2810 2811 dev = __dev_get_by_name(net, ifr->ifr_name); 2812 if (!dev) 2813 return -ENODEV; 2814 2815 if (ethcmd == ETHTOOL_PERQUEUE) { 2816 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 2817 return -EFAULT; 2818 } else { 2819 sub_cmd = ethcmd; 2820 } 2821 /* Allow some commands to be done by anyone */ 2822 switch (sub_cmd) { 2823 case ETHTOOL_GSET: 2824 case ETHTOOL_GDRVINFO: 2825 case ETHTOOL_GMSGLVL: 2826 case ETHTOOL_GLINK: 2827 case ETHTOOL_GCOALESCE: 2828 case ETHTOOL_GRINGPARAM: 2829 case ETHTOOL_GPAUSEPARAM: 2830 case ETHTOOL_GRXCSUM: 2831 case ETHTOOL_GTXCSUM: 2832 case ETHTOOL_GSG: 2833 case ETHTOOL_GSSET_INFO: 2834 case ETHTOOL_GSTRINGS: 2835 case ETHTOOL_GSTATS: 2836 case ETHTOOL_GPHYSTATS: 2837 case ETHTOOL_GTSO: 2838 case ETHTOOL_GPERMADDR: 2839 case ETHTOOL_GUFO: 2840 case ETHTOOL_GGSO: 2841 case ETHTOOL_GGRO: 2842 case ETHTOOL_GFLAGS: 2843 case ETHTOOL_GPFLAGS: 2844 case ETHTOOL_GRXFH: 2845 case ETHTOOL_GRXRINGS: 2846 case ETHTOOL_GRXCLSRLCNT: 2847 case ETHTOOL_GRXCLSRULE: 2848 case ETHTOOL_GRXCLSRLALL: 2849 case ETHTOOL_GRXFHINDIR: 2850 case ETHTOOL_GRSSH: 2851 case ETHTOOL_GFEATURES: 2852 case ETHTOOL_GCHANNELS: 2853 case ETHTOOL_GET_TS_INFO: 2854 case ETHTOOL_GEEE: 2855 case ETHTOOL_GTUNABLE: 2856 case ETHTOOL_PHY_GTUNABLE: 2857 case ETHTOOL_GLINKSETTINGS: 2858 case ETHTOOL_GFECPARAM: 2859 break; 2860 default: 2861 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2862 return -EPERM; 2863 } 2864 2865 if (dev->dev.parent) 2866 pm_runtime_get_sync(dev->dev.parent); 2867 2868 if (!netif_device_present(dev)) { 2869 rc = -ENODEV; 2870 goto out; 2871 } 2872 2873 if (dev->ethtool_ops->begin) { 2874 rc = dev->ethtool_ops->begin(dev); 2875 if (rc < 0) 2876 goto out; 2877 } 2878 old_features = dev->features; 2879 2880 switch (ethcmd) { 2881 case ETHTOOL_GSET: 2882 rc = ethtool_get_settings(dev, useraddr); 2883 break; 2884 case ETHTOOL_SSET: 2885 rc = ethtool_set_settings(dev, useraddr); 2886 break; 2887 case ETHTOOL_GDRVINFO: 2888 rc = ethtool_get_drvinfo(dev, devlink_state); 2889 break; 2890 case ETHTOOL_GREGS: 2891 rc = ethtool_get_regs(dev, useraddr); 2892 break; 2893 case ETHTOOL_GWOL: 2894 rc = ethtool_get_wol(dev, useraddr); 2895 break; 2896 case ETHTOOL_SWOL: 2897 rc = ethtool_set_wol(dev, useraddr); 2898 break; 2899 case ETHTOOL_GMSGLVL: 2900 rc = ethtool_get_value(dev, useraddr, ethcmd, 2901 dev->ethtool_ops->get_msglevel); 2902 break; 2903 case ETHTOOL_SMSGLVL: 2904 rc = ethtool_set_value_void(dev, useraddr, 2905 dev->ethtool_ops->set_msglevel); 2906 if (!rc) 2907 ethtool_notify(dev, ETHTOOL_MSG_DEBUG_NTF, NULL); 2908 break; 2909 case ETHTOOL_GEEE: 2910 rc = ethtool_get_eee(dev, useraddr); 2911 break; 2912 case ETHTOOL_SEEE: 2913 rc = ethtool_set_eee(dev, useraddr); 2914 break; 2915 case ETHTOOL_NWAY_RST: 2916 rc = ethtool_nway_reset(dev); 2917 break; 2918 case ETHTOOL_GLINK: 2919 rc = ethtool_get_link(dev, useraddr); 2920 break; 2921 case ETHTOOL_GEEPROM: 2922 rc = ethtool_get_eeprom(dev, useraddr); 2923 break; 2924 case ETHTOOL_SEEPROM: 2925 rc = ethtool_set_eeprom(dev, useraddr); 2926 break; 2927 case ETHTOOL_GCOALESCE: 2928 rc = ethtool_get_coalesce(dev, useraddr); 2929 break; 2930 case ETHTOOL_SCOALESCE: 2931 rc = ethtool_set_coalesce(dev, useraddr); 2932 break; 2933 case ETHTOOL_GRINGPARAM: 2934 rc = ethtool_get_ringparam(dev, useraddr); 2935 break; 2936 case ETHTOOL_SRINGPARAM: 2937 rc = ethtool_set_ringparam(dev, useraddr); 2938 break; 2939 case ETHTOOL_GPAUSEPARAM: 2940 rc = ethtool_get_pauseparam(dev, useraddr); 2941 break; 2942 case ETHTOOL_SPAUSEPARAM: 2943 rc = ethtool_set_pauseparam(dev, useraddr); 2944 break; 2945 case ETHTOOL_TEST: 2946 rc = ethtool_self_test(dev, useraddr); 2947 break; 2948 case ETHTOOL_GSTRINGS: 2949 rc = ethtool_get_strings(dev, useraddr); 2950 break; 2951 case ETHTOOL_PHYS_ID: 2952 rc = ethtool_phys_id(dev, useraddr); 2953 break; 2954 case ETHTOOL_GSTATS: 2955 rc = ethtool_get_stats(dev, useraddr); 2956 break; 2957 case ETHTOOL_GPERMADDR: 2958 rc = ethtool_get_perm_addr(dev, useraddr); 2959 break; 2960 case ETHTOOL_GFLAGS: 2961 rc = ethtool_get_value(dev, useraddr, ethcmd, 2962 __ethtool_get_flags); 2963 break; 2964 case ETHTOOL_SFLAGS: 2965 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 2966 break; 2967 case ETHTOOL_GPFLAGS: 2968 rc = ethtool_get_value(dev, useraddr, ethcmd, 2969 dev->ethtool_ops->get_priv_flags); 2970 if (!rc) 2971 ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL); 2972 break; 2973 case ETHTOOL_SPFLAGS: 2974 rc = ethtool_set_value(dev, useraddr, 2975 dev->ethtool_ops->set_priv_flags); 2976 break; 2977 case ETHTOOL_GRXFH: 2978 case ETHTOOL_GRXRINGS: 2979 case ETHTOOL_GRXCLSRLCNT: 2980 case ETHTOOL_GRXCLSRULE: 2981 case ETHTOOL_GRXCLSRLALL: 2982 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 2983 break; 2984 case ETHTOOL_SRXFH: 2985 case ETHTOOL_SRXCLSRLDEL: 2986 case ETHTOOL_SRXCLSRLINS: 2987 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 2988 break; 2989 case ETHTOOL_FLASHDEV: 2990 rc = ethtool_flash_device(dev, devlink_state); 2991 break; 2992 case ETHTOOL_RESET: 2993 rc = ethtool_reset(dev, useraddr); 2994 break; 2995 case ETHTOOL_GSSET_INFO: 2996 rc = ethtool_get_sset_info(dev, useraddr); 2997 break; 2998 case ETHTOOL_GRXFHINDIR: 2999 rc = ethtool_get_rxfh_indir(dev, useraddr); 3000 break; 3001 case ETHTOOL_SRXFHINDIR: 3002 rc = ethtool_set_rxfh_indir(dev, useraddr); 3003 break; 3004 case ETHTOOL_GRSSH: 3005 rc = ethtool_get_rxfh(dev, useraddr); 3006 break; 3007 case ETHTOOL_SRSSH: 3008 rc = ethtool_set_rxfh(dev, useraddr); 3009 break; 3010 case ETHTOOL_GFEATURES: 3011 rc = ethtool_get_features(dev, useraddr); 3012 break; 3013 case ETHTOOL_SFEATURES: 3014 rc = ethtool_set_features(dev, useraddr); 3015 break; 3016 case ETHTOOL_GTXCSUM: 3017 case ETHTOOL_GRXCSUM: 3018 case ETHTOOL_GSG: 3019 case ETHTOOL_GTSO: 3020 case ETHTOOL_GGSO: 3021 case ETHTOOL_GGRO: 3022 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 3023 break; 3024 case ETHTOOL_STXCSUM: 3025 case ETHTOOL_SRXCSUM: 3026 case ETHTOOL_SSG: 3027 case ETHTOOL_STSO: 3028 case ETHTOOL_SGSO: 3029 case ETHTOOL_SGRO: 3030 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 3031 break; 3032 case ETHTOOL_GCHANNELS: 3033 rc = ethtool_get_channels(dev, useraddr); 3034 break; 3035 case ETHTOOL_SCHANNELS: 3036 rc = ethtool_set_channels(dev, useraddr); 3037 break; 3038 case ETHTOOL_SET_DUMP: 3039 rc = ethtool_set_dump(dev, useraddr); 3040 break; 3041 case ETHTOOL_GET_DUMP_FLAG: 3042 rc = ethtool_get_dump_flag(dev, useraddr); 3043 break; 3044 case ETHTOOL_GET_DUMP_DATA: 3045 rc = ethtool_get_dump_data(dev, useraddr); 3046 break; 3047 case ETHTOOL_GET_TS_INFO: 3048 rc = ethtool_get_ts_info(dev, useraddr); 3049 break; 3050 case ETHTOOL_GMODULEINFO: 3051 rc = ethtool_get_module_info(dev, useraddr); 3052 break; 3053 case ETHTOOL_GMODULEEEPROM: 3054 rc = ethtool_get_module_eeprom(dev, useraddr); 3055 break; 3056 case ETHTOOL_GTUNABLE: 3057 rc = ethtool_get_tunable(dev, useraddr); 3058 break; 3059 case ETHTOOL_STUNABLE: 3060 rc = ethtool_set_tunable(dev, useraddr); 3061 break; 3062 case ETHTOOL_GPHYSTATS: 3063 rc = ethtool_get_phy_stats(dev, useraddr); 3064 break; 3065 case ETHTOOL_PERQUEUE: 3066 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 3067 break; 3068 case ETHTOOL_GLINKSETTINGS: 3069 rc = ethtool_get_link_ksettings(dev, useraddr); 3070 break; 3071 case ETHTOOL_SLINKSETTINGS: 3072 rc = ethtool_set_link_ksettings(dev, useraddr); 3073 break; 3074 case ETHTOOL_PHY_GTUNABLE: 3075 rc = get_phy_tunable(dev, useraddr); 3076 break; 3077 case ETHTOOL_PHY_STUNABLE: 3078 rc = set_phy_tunable(dev, useraddr); 3079 break; 3080 case ETHTOOL_GFECPARAM: 3081 rc = ethtool_get_fecparam(dev, useraddr); 3082 break; 3083 case ETHTOOL_SFECPARAM: 3084 rc = ethtool_set_fecparam(dev, useraddr); 3085 break; 3086 default: 3087 rc = -EOPNOTSUPP; 3088 } 3089 3090 if (dev->ethtool_ops->complete) 3091 dev->ethtool_ops->complete(dev); 3092 3093 if (old_features != dev->features) 3094 netdev_features_change(dev); 3095 out: 3096 if (dev->dev.parent) 3097 pm_runtime_put(dev->dev.parent); 3098 3099 return rc; 3100 } 3101 3102 int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *useraddr) 3103 { 3104 struct ethtool_devlink_compat *state; 3105 u32 ethcmd; 3106 int rc; 3107 3108 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 3109 return -EFAULT; 3110 3111 state = kzalloc(sizeof(*state), GFP_KERNEL); 3112 if (!state) 3113 return -ENOMEM; 3114 3115 switch (ethcmd) { 3116 case ETHTOOL_FLASHDEV: 3117 if (copy_from_user(&state->efl, useraddr, sizeof(state->efl))) { 3118 rc = -EFAULT; 3119 goto exit_free; 3120 } 3121 state->efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 3122 break; 3123 } 3124 3125 rtnl_lock(); 3126 rc = __dev_ethtool(net, ifr, useraddr, ethcmd, state); 3127 rtnl_unlock(); 3128 if (rc) 3129 goto exit_free; 3130 3131 switch (ethcmd) { 3132 case ETHTOOL_FLASHDEV: 3133 if (state->devlink) 3134 rc = devlink_compat_flash_update(state->devlink, 3135 state->efl.data); 3136 break; 3137 case ETHTOOL_GDRVINFO: 3138 if (state->devlink) 3139 devlink_compat_running_version(state->devlink, 3140 state->info.fw_version, 3141 sizeof(state->info.fw_version)); 3142 if (copy_to_user(useraddr, &state->info, sizeof(state->info))) { 3143 rc = -EFAULT; 3144 goto exit_free; 3145 } 3146 break; 3147 } 3148 3149 exit_free: 3150 if (state->devlink) 3151 devlink_put(state->devlink); 3152 kfree(state); 3153 return rc; 3154 } 3155 3156 struct ethtool_rx_flow_key { 3157 struct flow_dissector_key_basic basic; 3158 union { 3159 struct flow_dissector_key_ipv4_addrs ipv4; 3160 struct flow_dissector_key_ipv6_addrs ipv6; 3161 }; 3162 struct flow_dissector_key_ports tp; 3163 struct flow_dissector_key_ip ip; 3164 struct flow_dissector_key_vlan vlan; 3165 struct flow_dissector_key_eth_addrs eth_addrs; 3166 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 3167 3168 struct ethtool_rx_flow_match { 3169 struct flow_dissector dissector; 3170 struct ethtool_rx_flow_key key; 3171 struct ethtool_rx_flow_key mask; 3172 }; 3173 3174 struct ethtool_rx_flow_rule * 3175 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 3176 { 3177 const struct ethtool_rx_flow_spec *fs = input->fs; 3178 struct ethtool_rx_flow_match *match; 3179 struct ethtool_rx_flow_rule *flow; 3180 struct flow_action_entry *act; 3181 3182 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 3183 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 3184 if (!flow) 3185 return ERR_PTR(-ENOMEM); 3186 3187 /* ethtool_rx supports only one single action per rule. */ 3188 flow->rule = flow_rule_alloc(1); 3189 if (!flow->rule) { 3190 kfree(flow); 3191 return ERR_PTR(-ENOMEM); 3192 } 3193 3194 match = (struct ethtool_rx_flow_match *)flow->priv; 3195 flow->rule->match.dissector = &match->dissector; 3196 flow->rule->match.mask = &match->mask; 3197 flow->rule->match.key = &match->key; 3198 3199 match->mask.basic.n_proto = htons(0xffff); 3200 3201 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3202 case ETHER_FLOW: { 3203 const struct ethhdr *ether_spec, *ether_m_spec; 3204 3205 ether_spec = &fs->h_u.ether_spec; 3206 ether_m_spec = &fs->m_u.ether_spec; 3207 3208 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 3209 ether_addr_copy(match->key.eth_addrs.src, 3210 ether_spec->h_source); 3211 ether_addr_copy(match->mask.eth_addrs.src, 3212 ether_m_spec->h_source); 3213 } 3214 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 3215 ether_addr_copy(match->key.eth_addrs.dst, 3216 ether_spec->h_dest); 3217 ether_addr_copy(match->mask.eth_addrs.dst, 3218 ether_m_spec->h_dest); 3219 } 3220 if (ether_m_spec->h_proto) { 3221 match->key.basic.n_proto = ether_spec->h_proto; 3222 match->mask.basic.n_proto = ether_m_spec->h_proto; 3223 } 3224 } 3225 break; 3226 case TCP_V4_FLOW: 3227 case UDP_V4_FLOW: { 3228 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 3229 3230 match->key.basic.n_proto = htons(ETH_P_IP); 3231 3232 v4_spec = &fs->h_u.tcp_ip4_spec; 3233 v4_m_spec = &fs->m_u.tcp_ip4_spec; 3234 3235 if (v4_m_spec->ip4src) { 3236 match->key.ipv4.src = v4_spec->ip4src; 3237 match->mask.ipv4.src = v4_m_spec->ip4src; 3238 } 3239 if (v4_m_spec->ip4dst) { 3240 match->key.ipv4.dst = v4_spec->ip4dst; 3241 match->mask.ipv4.dst = v4_m_spec->ip4dst; 3242 } 3243 if (v4_m_spec->ip4src || 3244 v4_m_spec->ip4dst) { 3245 match->dissector.used_keys |= 3246 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 3247 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 3248 offsetof(struct ethtool_rx_flow_key, ipv4); 3249 } 3250 if (v4_m_spec->psrc) { 3251 match->key.tp.src = v4_spec->psrc; 3252 match->mask.tp.src = v4_m_spec->psrc; 3253 } 3254 if (v4_m_spec->pdst) { 3255 match->key.tp.dst = v4_spec->pdst; 3256 match->mask.tp.dst = v4_m_spec->pdst; 3257 } 3258 if (v4_m_spec->psrc || 3259 v4_m_spec->pdst) { 3260 match->dissector.used_keys |= 3261 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS); 3262 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3263 offsetof(struct ethtool_rx_flow_key, tp); 3264 } 3265 if (v4_m_spec->tos) { 3266 match->key.ip.tos = v4_spec->tos; 3267 match->mask.ip.tos = v4_m_spec->tos; 3268 match->dissector.used_keys |= 3269 BIT(FLOW_DISSECTOR_KEY_IP); 3270 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3271 offsetof(struct ethtool_rx_flow_key, ip); 3272 } 3273 } 3274 break; 3275 case TCP_V6_FLOW: 3276 case UDP_V6_FLOW: { 3277 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 3278 3279 match->key.basic.n_proto = htons(ETH_P_IPV6); 3280 3281 v6_spec = &fs->h_u.tcp_ip6_spec; 3282 v6_m_spec = &fs->m_u.tcp_ip6_spec; 3283 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src)) { 3284 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 3285 sizeof(match->key.ipv6.src)); 3286 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 3287 sizeof(match->mask.ipv6.src)); 3288 } 3289 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) { 3290 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 3291 sizeof(match->key.ipv6.dst)); 3292 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 3293 sizeof(match->mask.ipv6.dst)); 3294 } 3295 if (!ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6src) || 3296 !ipv6_addr_any((struct in6_addr *)v6_m_spec->ip6dst)) { 3297 match->dissector.used_keys |= 3298 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 3299 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 3300 offsetof(struct ethtool_rx_flow_key, ipv6); 3301 } 3302 if (v6_m_spec->psrc) { 3303 match->key.tp.src = v6_spec->psrc; 3304 match->mask.tp.src = v6_m_spec->psrc; 3305 } 3306 if (v6_m_spec->pdst) { 3307 match->key.tp.dst = v6_spec->pdst; 3308 match->mask.tp.dst = v6_m_spec->pdst; 3309 } 3310 if (v6_m_spec->psrc || 3311 v6_m_spec->pdst) { 3312 match->dissector.used_keys |= 3313 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS); 3314 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 3315 offsetof(struct ethtool_rx_flow_key, tp); 3316 } 3317 if (v6_m_spec->tclass) { 3318 match->key.ip.tos = v6_spec->tclass; 3319 match->mask.ip.tos = v6_m_spec->tclass; 3320 match->dissector.used_keys |= 3321 BIT_ULL(FLOW_DISSECTOR_KEY_IP); 3322 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 3323 offsetof(struct ethtool_rx_flow_key, ip); 3324 } 3325 } 3326 break; 3327 default: 3328 ethtool_rx_flow_rule_destroy(flow); 3329 return ERR_PTR(-EINVAL); 3330 } 3331 3332 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 3333 case TCP_V4_FLOW: 3334 case TCP_V6_FLOW: 3335 match->key.basic.ip_proto = IPPROTO_TCP; 3336 match->mask.basic.ip_proto = 0xff; 3337 break; 3338 case UDP_V4_FLOW: 3339 case UDP_V6_FLOW: 3340 match->key.basic.ip_proto = IPPROTO_UDP; 3341 match->mask.basic.ip_proto = 0xff; 3342 break; 3343 } 3344 3345 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_BASIC); 3346 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 3347 offsetof(struct ethtool_rx_flow_key, basic); 3348 3349 if (fs->flow_type & FLOW_EXT) { 3350 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3351 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3352 3353 if (ext_m_spec->vlan_etype) { 3354 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 3355 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 3356 } 3357 3358 if (ext_m_spec->vlan_tci) { 3359 match->key.vlan.vlan_id = 3360 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 3361 match->mask.vlan.vlan_id = 3362 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 3363 3364 match->key.vlan.vlan_dei = 3365 !!(ext_h_spec->vlan_tci & htons(0x1000)); 3366 match->mask.vlan.vlan_dei = 3367 !!(ext_m_spec->vlan_tci & htons(0x1000)); 3368 3369 match->key.vlan.vlan_priority = 3370 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 3371 match->mask.vlan.vlan_priority = 3372 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 3373 } 3374 3375 if (ext_m_spec->vlan_etype || 3376 ext_m_spec->vlan_tci) { 3377 match->dissector.used_keys |= 3378 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN); 3379 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 3380 offsetof(struct ethtool_rx_flow_key, vlan); 3381 } 3382 } 3383 if (fs->flow_type & FLOW_MAC_EXT) { 3384 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 3385 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 3386 3387 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 3388 ETH_ALEN); 3389 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 3390 ETH_ALEN); 3391 3392 match->dissector.used_keys |= 3393 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS); 3394 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 3395 offsetof(struct ethtool_rx_flow_key, eth_addrs); 3396 } 3397 3398 act = &flow->rule->action.entries[0]; 3399 switch (fs->ring_cookie) { 3400 case RX_CLS_FLOW_DISC: 3401 act->id = FLOW_ACTION_DROP; 3402 break; 3403 case RX_CLS_FLOW_WAKE: 3404 act->id = FLOW_ACTION_WAKE; 3405 break; 3406 default: 3407 act->id = FLOW_ACTION_QUEUE; 3408 if (fs->flow_type & FLOW_RSS) 3409 act->queue.ctx = input->rss_ctx; 3410 3411 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 3412 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 3413 break; 3414 } 3415 3416 return flow; 3417 } 3418 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3419 3420 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3421 { 3422 kfree(flow->rule); 3423 kfree(flow); 3424 } 3425 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3426