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/module.h> 11 #include <linux/types.h> 12 #include <linux/capability.h> 13 #include <linux/errno.h> 14 #include <linux/ethtool.h> 15 #include <linux/netdevice.h> 16 #include <linux/net_tstamp.h> 17 #include <linux/phy.h> 18 #include <linux/bitops.h> 19 #include <linux/uaccess.h> 20 #include <linux/vmalloc.h> 21 #include <linux/sfp.h> 22 #include <linux/slab.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/sched/signal.h> 25 #include <linux/net.h> 26 #include <net/devlink.h> 27 #include <net/xdp_sock.h> 28 #include <net/flow_offload.h> 29 #include <linux/ethtool_netlink.h> 30 31 #include "common.h" 32 33 /* 34 * Some useful ethtool_ops methods that're device independent. 35 * If we find that all drivers want to do the same thing here, 36 * we can turn these into dev_() function calls. 37 */ 38 39 u32 ethtool_op_get_link(struct net_device *dev) 40 { 41 return netif_carrier_ok(dev) ? 1 : 0; 42 } 43 EXPORT_SYMBOL(ethtool_op_get_link); 44 45 int ethtool_op_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) 46 { 47 info->so_timestamping = 48 SOF_TIMESTAMPING_TX_SOFTWARE | 49 SOF_TIMESTAMPING_RX_SOFTWARE | 50 SOF_TIMESTAMPING_SOFTWARE; 51 info->phc_index = -1; 52 return 0; 53 } 54 EXPORT_SYMBOL(ethtool_op_get_ts_info); 55 56 /* Handlers for each ethtool command */ 57 58 #define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32) 59 60 static int ethtool_get_features(struct net_device *dev, void __user *useraddr) 61 { 62 struct ethtool_gfeatures cmd = { 63 .cmd = ETHTOOL_GFEATURES, 64 .size = ETHTOOL_DEV_FEATURE_WORDS, 65 }; 66 struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 67 u32 __user *sizeaddr; 68 u32 copy_size; 69 int i; 70 71 /* in case feature bits run out again */ 72 BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t)); 73 74 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 75 features[i].available = (u32)(dev->hw_features >> (32 * i)); 76 features[i].requested = (u32)(dev->wanted_features >> (32 * i)); 77 features[i].active = (u32)(dev->features >> (32 * i)); 78 features[i].never_changed = 79 (u32)(NETIF_F_NEVER_CHANGE >> (32 * i)); 80 } 81 82 sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size); 83 if (get_user(copy_size, sizeaddr)) 84 return -EFAULT; 85 86 if (copy_size > ETHTOOL_DEV_FEATURE_WORDS) 87 copy_size = ETHTOOL_DEV_FEATURE_WORDS; 88 89 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 90 return -EFAULT; 91 useraddr += sizeof(cmd); 92 if (copy_to_user(useraddr, features, copy_size * sizeof(*features))) 93 return -EFAULT; 94 95 return 0; 96 } 97 98 static int ethtool_set_features(struct net_device *dev, void __user *useraddr) 99 { 100 struct ethtool_sfeatures cmd; 101 struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS]; 102 netdev_features_t wanted = 0, valid = 0; 103 int i, ret = 0; 104 105 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 106 return -EFAULT; 107 useraddr += sizeof(cmd); 108 109 if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS) 110 return -EINVAL; 111 112 if (copy_from_user(features, useraddr, sizeof(features))) 113 return -EFAULT; 114 115 for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) { 116 valid |= (netdev_features_t)features[i].valid << (32 * i); 117 wanted |= (netdev_features_t)features[i].requested << (32 * i); 118 } 119 120 if (valid & ~NETIF_F_ETHTOOL_BITS) 121 return -EINVAL; 122 123 if (valid & ~dev->hw_features) { 124 valid &= dev->hw_features; 125 ret |= ETHTOOL_F_UNSUPPORTED; 126 } 127 128 dev->wanted_features &= ~valid; 129 dev->wanted_features |= wanted & valid; 130 __netdev_update_features(dev); 131 132 if ((dev->wanted_features ^ dev->features) & valid) 133 ret |= ETHTOOL_F_WISH; 134 135 return ret; 136 } 137 138 static int __ethtool_get_sset_count(struct net_device *dev, int sset) 139 { 140 const struct ethtool_ops *ops = dev->ethtool_ops; 141 142 if (sset == ETH_SS_FEATURES) 143 return ARRAY_SIZE(netdev_features_strings); 144 145 if (sset == ETH_SS_RSS_HASH_FUNCS) 146 return ARRAY_SIZE(rss_hash_func_strings); 147 148 if (sset == ETH_SS_TUNABLES) 149 return ARRAY_SIZE(tunable_strings); 150 151 if (sset == ETH_SS_PHY_TUNABLES) 152 return ARRAY_SIZE(phy_tunable_strings); 153 154 if (sset == ETH_SS_PHY_STATS && dev->phydev && 155 !ops->get_ethtool_phy_stats) 156 return phy_ethtool_get_sset_count(dev->phydev); 157 158 if (sset == ETH_SS_LINK_MODES) 159 return __ETHTOOL_LINK_MODE_MASK_NBITS; 160 161 if (ops->get_sset_count && ops->get_strings) 162 return ops->get_sset_count(dev, sset); 163 else 164 return -EOPNOTSUPP; 165 } 166 167 static void __ethtool_get_strings(struct net_device *dev, 168 u32 stringset, u8 *data) 169 { 170 const struct ethtool_ops *ops = dev->ethtool_ops; 171 172 if (stringset == ETH_SS_FEATURES) 173 memcpy(data, netdev_features_strings, 174 sizeof(netdev_features_strings)); 175 else if (stringset == ETH_SS_RSS_HASH_FUNCS) 176 memcpy(data, rss_hash_func_strings, 177 sizeof(rss_hash_func_strings)); 178 else if (stringset == ETH_SS_TUNABLES) 179 memcpy(data, tunable_strings, sizeof(tunable_strings)); 180 else if (stringset == ETH_SS_PHY_TUNABLES) 181 memcpy(data, phy_tunable_strings, sizeof(phy_tunable_strings)); 182 else if (stringset == ETH_SS_PHY_STATS && dev->phydev && 183 !ops->get_ethtool_phy_stats) 184 phy_ethtool_get_strings(dev->phydev, data); 185 else if (stringset == ETH_SS_LINK_MODES) 186 memcpy(data, link_mode_names, 187 __ETHTOOL_LINK_MODE_MASK_NBITS * ETH_GSTRING_LEN); 188 else 189 /* ops->get_strings is valid because checked earlier */ 190 ops->get_strings(dev, stringset, data); 191 } 192 193 static netdev_features_t ethtool_get_feature_mask(u32 eth_cmd) 194 { 195 /* feature masks of legacy discrete ethtool ops */ 196 197 switch (eth_cmd) { 198 case ETHTOOL_GTXCSUM: 199 case ETHTOOL_STXCSUM: 200 return NETIF_F_CSUM_MASK | NETIF_F_SCTP_CRC; 201 case ETHTOOL_GRXCSUM: 202 case ETHTOOL_SRXCSUM: 203 return NETIF_F_RXCSUM; 204 case ETHTOOL_GSG: 205 case ETHTOOL_SSG: 206 return NETIF_F_SG; 207 case ETHTOOL_GTSO: 208 case ETHTOOL_STSO: 209 return NETIF_F_ALL_TSO; 210 case ETHTOOL_GGSO: 211 case ETHTOOL_SGSO: 212 return NETIF_F_GSO; 213 case ETHTOOL_GGRO: 214 case ETHTOOL_SGRO: 215 return NETIF_F_GRO; 216 default: 217 BUG(); 218 } 219 } 220 221 static int ethtool_get_one_feature(struct net_device *dev, 222 char __user *useraddr, u32 ethcmd) 223 { 224 netdev_features_t mask = ethtool_get_feature_mask(ethcmd); 225 struct ethtool_value edata = { 226 .cmd = ethcmd, 227 .data = !!(dev->features & mask), 228 }; 229 230 if (copy_to_user(useraddr, &edata, sizeof(edata))) 231 return -EFAULT; 232 return 0; 233 } 234 235 static int ethtool_set_one_feature(struct net_device *dev, 236 void __user *useraddr, u32 ethcmd) 237 { 238 struct ethtool_value edata; 239 netdev_features_t mask; 240 241 if (copy_from_user(&edata, useraddr, sizeof(edata))) 242 return -EFAULT; 243 244 mask = ethtool_get_feature_mask(ethcmd); 245 mask &= dev->hw_features; 246 if (!mask) 247 return -EOPNOTSUPP; 248 249 if (edata.data) 250 dev->wanted_features |= mask; 251 else 252 dev->wanted_features &= ~mask; 253 254 __netdev_update_features(dev); 255 256 return 0; 257 } 258 259 #define ETH_ALL_FLAGS (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | \ 260 ETH_FLAG_NTUPLE | ETH_FLAG_RXHASH) 261 #define ETH_ALL_FEATURES (NETIF_F_LRO | NETIF_F_HW_VLAN_CTAG_RX | \ 262 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_NTUPLE | \ 263 NETIF_F_RXHASH) 264 265 static u32 __ethtool_get_flags(struct net_device *dev) 266 { 267 u32 flags = 0; 268 269 if (dev->features & NETIF_F_LRO) 270 flags |= ETH_FLAG_LRO; 271 if (dev->features & NETIF_F_HW_VLAN_CTAG_RX) 272 flags |= ETH_FLAG_RXVLAN; 273 if (dev->features & NETIF_F_HW_VLAN_CTAG_TX) 274 flags |= ETH_FLAG_TXVLAN; 275 if (dev->features & NETIF_F_NTUPLE) 276 flags |= ETH_FLAG_NTUPLE; 277 if (dev->features & NETIF_F_RXHASH) 278 flags |= ETH_FLAG_RXHASH; 279 280 return flags; 281 } 282 283 static int __ethtool_set_flags(struct net_device *dev, u32 data) 284 { 285 netdev_features_t features = 0, changed; 286 287 if (data & ~ETH_ALL_FLAGS) 288 return -EINVAL; 289 290 if (data & ETH_FLAG_LRO) 291 features |= NETIF_F_LRO; 292 if (data & ETH_FLAG_RXVLAN) 293 features |= NETIF_F_HW_VLAN_CTAG_RX; 294 if (data & ETH_FLAG_TXVLAN) 295 features |= NETIF_F_HW_VLAN_CTAG_TX; 296 if (data & ETH_FLAG_NTUPLE) 297 features |= NETIF_F_NTUPLE; 298 if (data & ETH_FLAG_RXHASH) 299 features |= NETIF_F_RXHASH; 300 301 /* allow changing only bits set in hw_features */ 302 changed = (features ^ dev->features) & ETH_ALL_FEATURES; 303 if (changed & ~dev->hw_features) 304 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP; 305 306 dev->wanted_features = 307 (dev->wanted_features & ~changed) | (features & changed); 308 309 __netdev_update_features(dev); 310 311 return 0; 312 } 313 314 /* Given two link masks, AND them together and save the result in dst. */ 315 void ethtool_intersect_link_masks(struct ethtool_link_ksettings *dst, 316 struct ethtool_link_ksettings *src) 317 { 318 unsigned int size = BITS_TO_LONGS(__ETHTOOL_LINK_MODE_MASK_NBITS); 319 unsigned int idx = 0; 320 321 for (; idx < size; idx++) { 322 dst->link_modes.supported[idx] &= 323 src->link_modes.supported[idx]; 324 dst->link_modes.advertising[idx] &= 325 src->link_modes.advertising[idx]; 326 } 327 } 328 EXPORT_SYMBOL(ethtool_intersect_link_masks); 329 330 void ethtool_convert_legacy_u32_to_link_mode(unsigned long *dst, 331 u32 legacy_u32) 332 { 333 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS); 334 dst[0] = legacy_u32; 335 } 336 EXPORT_SYMBOL(ethtool_convert_legacy_u32_to_link_mode); 337 338 /* return false if src had higher bits set. lower bits always updated. */ 339 bool ethtool_convert_link_mode_to_legacy_u32(u32 *legacy_u32, 340 const unsigned long *src) 341 { 342 bool retval = true; 343 344 /* TODO: following test will soon always be true */ 345 if (__ETHTOOL_LINK_MODE_MASK_NBITS > 32) { 346 __ETHTOOL_DECLARE_LINK_MODE_MASK(ext); 347 348 bitmap_zero(ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 349 bitmap_fill(ext, 32); 350 bitmap_complement(ext, ext, __ETHTOOL_LINK_MODE_MASK_NBITS); 351 if (bitmap_intersects(ext, src, 352 __ETHTOOL_LINK_MODE_MASK_NBITS)) { 353 /* src mask goes beyond bit 31 */ 354 retval = false; 355 } 356 } 357 *legacy_u32 = src[0]; 358 return retval; 359 } 360 EXPORT_SYMBOL(ethtool_convert_link_mode_to_legacy_u32); 361 362 /* return false if ksettings link modes had higher bits 363 * set. legacy_settings always updated (best effort) 364 */ 365 static bool 366 convert_link_ksettings_to_legacy_settings( 367 struct ethtool_cmd *legacy_settings, 368 const struct ethtool_link_ksettings *link_ksettings) 369 { 370 bool retval = true; 371 372 memset(legacy_settings, 0, sizeof(*legacy_settings)); 373 /* this also clears the deprecated fields in legacy structure: 374 * __u8 transceiver; 375 * __u32 maxtxpkt; 376 * __u32 maxrxpkt; 377 */ 378 379 retval &= ethtool_convert_link_mode_to_legacy_u32( 380 &legacy_settings->supported, 381 link_ksettings->link_modes.supported); 382 retval &= ethtool_convert_link_mode_to_legacy_u32( 383 &legacy_settings->advertising, 384 link_ksettings->link_modes.advertising); 385 retval &= ethtool_convert_link_mode_to_legacy_u32( 386 &legacy_settings->lp_advertising, 387 link_ksettings->link_modes.lp_advertising); 388 ethtool_cmd_speed_set(legacy_settings, link_ksettings->base.speed); 389 legacy_settings->duplex 390 = link_ksettings->base.duplex; 391 legacy_settings->port 392 = link_ksettings->base.port; 393 legacy_settings->phy_address 394 = link_ksettings->base.phy_address; 395 legacy_settings->autoneg 396 = link_ksettings->base.autoneg; 397 legacy_settings->mdio_support 398 = link_ksettings->base.mdio_support; 399 legacy_settings->eth_tp_mdix 400 = link_ksettings->base.eth_tp_mdix; 401 legacy_settings->eth_tp_mdix_ctrl 402 = link_ksettings->base.eth_tp_mdix_ctrl; 403 legacy_settings->transceiver 404 = link_ksettings->base.transceiver; 405 return retval; 406 } 407 408 /* number of 32-bit words to store the user's link mode bitmaps */ 409 #define __ETHTOOL_LINK_MODE_MASK_NU32 \ 410 DIV_ROUND_UP(__ETHTOOL_LINK_MODE_MASK_NBITS, 32) 411 412 /* layout of the struct passed from/to userland */ 413 struct ethtool_link_usettings { 414 struct ethtool_link_settings base; 415 struct { 416 __u32 supported[__ETHTOOL_LINK_MODE_MASK_NU32]; 417 __u32 advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 418 __u32 lp_advertising[__ETHTOOL_LINK_MODE_MASK_NU32]; 419 } link_modes; 420 }; 421 422 /* Internal kernel helper to query a device ethtool_link_settings. */ 423 int __ethtool_get_link_ksettings(struct net_device *dev, 424 struct ethtool_link_ksettings *link_ksettings) 425 { 426 ASSERT_RTNL(); 427 428 if (!dev->ethtool_ops->get_link_ksettings) 429 return -EOPNOTSUPP; 430 431 memset(link_ksettings, 0, sizeof(*link_ksettings)); 432 return dev->ethtool_ops->get_link_ksettings(dev, link_ksettings); 433 } 434 EXPORT_SYMBOL(__ethtool_get_link_ksettings); 435 436 /* convert ethtool_link_usettings in user space to a kernel internal 437 * ethtool_link_ksettings. return 0 on success, errno on error. 438 */ 439 static int load_link_ksettings_from_user(struct ethtool_link_ksettings *to, 440 const void __user *from) 441 { 442 struct ethtool_link_usettings link_usettings; 443 444 if (copy_from_user(&link_usettings, from, sizeof(link_usettings))) 445 return -EFAULT; 446 447 memcpy(&to->base, &link_usettings.base, sizeof(to->base)); 448 bitmap_from_arr32(to->link_modes.supported, 449 link_usettings.link_modes.supported, 450 __ETHTOOL_LINK_MODE_MASK_NBITS); 451 bitmap_from_arr32(to->link_modes.advertising, 452 link_usettings.link_modes.advertising, 453 __ETHTOOL_LINK_MODE_MASK_NBITS); 454 bitmap_from_arr32(to->link_modes.lp_advertising, 455 link_usettings.link_modes.lp_advertising, 456 __ETHTOOL_LINK_MODE_MASK_NBITS); 457 458 return 0; 459 } 460 461 /* convert a kernel internal ethtool_link_ksettings to 462 * ethtool_link_usettings in user space. return 0 on success, errno on 463 * error. 464 */ 465 static int 466 store_link_ksettings_for_user(void __user *to, 467 const struct ethtool_link_ksettings *from) 468 { 469 struct ethtool_link_usettings link_usettings; 470 471 memcpy(&link_usettings.base, &from->base, sizeof(link_usettings)); 472 bitmap_to_arr32(link_usettings.link_modes.supported, 473 from->link_modes.supported, 474 __ETHTOOL_LINK_MODE_MASK_NBITS); 475 bitmap_to_arr32(link_usettings.link_modes.advertising, 476 from->link_modes.advertising, 477 __ETHTOOL_LINK_MODE_MASK_NBITS); 478 bitmap_to_arr32(link_usettings.link_modes.lp_advertising, 479 from->link_modes.lp_advertising, 480 __ETHTOOL_LINK_MODE_MASK_NBITS); 481 482 if (copy_to_user(to, &link_usettings, sizeof(link_usettings))) 483 return -EFAULT; 484 485 return 0; 486 } 487 488 /* Query device for its ethtool_link_settings. */ 489 static int ethtool_get_link_ksettings(struct net_device *dev, 490 void __user *useraddr) 491 { 492 int err = 0; 493 struct ethtool_link_ksettings link_ksettings; 494 495 ASSERT_RTNL(); 496 if (!dev->ethtool_ops->get_link_ksettings) 497 return -EOPNOTSUPP; 498 499 /* handle bitmap nbits handshake */ 500 if (copy_from_user(&link_ksettings.base, useraddr, 501 sizeof(link_ksettings.base))) 502 return -EFAULT; 503 504 if (__ETHTOOL_LINK_MODE_MASK_NU32 505 != link_ksettings.base.link_mode_masks_nwords) { 506 /* wrong link mode nbits requested */ 507 memset(&link_ksettings, 0, sizeof(link_ksettings)); 508 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 509 /* send back number of words required as negative val */ 510 compiletime_assert(__ETHTOOL_LINK_MODE_MASK_NU32 <= S8_MAX, 511 "need too many bits for link modes!"); 512 link_ksettings.base.link_mode_masks_nwords 513 = -((s8)__ETHTOOL_LINK_MODE_MASK_NU32); 514 515 /* copy the base fields back to user, not the link 516 * mode bitmaps 517 */ 518 if (copy_to_user(useraddr, &link_ksettings.base, 519 sizeof(link_ksettings.base))) 520 return -EFAULT; 521 522 return 0; 523 } 524 525 /* handshake successful: user/kernel agree on 526 * link_mode_masks_nwords 527 */ 528 529 memset(&link_ksettings, 0, sizeof(link_ksettings)); 530 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 531 if (err < 0) 532 return err; 533 534 /* make sure we tell the right values to user */ 535 link_ksettings.base.cmd = ETHTOOL_GLINKSETTINGS; 536 link_ksettings.base.link_mode_masks_nwords 537 = __ETHTOOL_LINK_MODE_MASK_NU32; 538 539 return store_link_ksettings_for_user(useraddr, &link_ksettings); 540 } 541 542 /* Update device ethtool_link_settings. */ 543 static int ethtool_set_link_ksettings(struct net_device *dev, 544 void __user *useraddr) 545 { 546 int err; 547 struct ethtool_link_ksettings link_ksettings; 548 549 ASSERT_RTNL(); 550 551 if (!dev->ethtool_ops->set_link_ksettings) 552 return -EOPNOTSUPP; 553 554 /* make sure nbits field has expected value */ 555 if (copy_from_user(&link_ksettings.base, useraddr, 556 sizeof(link_ksettings.base))) 557 return -EFAULT; 558 559 if (__ETHTOOL_LINK_MODE_MASK_NU32 560 != link_ksettings.base.link_mode_masks_nwords) 561 return -EINVAL; 562 563 /* copy the whole structure, now that we know it has expected 564 * format 565 */ 566 err = load_link_ksettings_from_user(&link_ksettings, useraddr); 567 if (err) 568 return err; 569 570 /* re-check nwords field, just in case */ 571 if (__ETHTOOL_LINK_MODE_MASK_NU32 572 != link_ksettings.base.link_mode_masks_nwords) 573 return -EINVAL; 574 575 err = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 576 if (err >= 0) { 577 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 578 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 579 } 580 return err; 581 } 582 583 /* Query device for its ethtool_cmd settings. 584 * 585 * Backward compatibility note: for compatibility with legacy ethtool, this is 586 * now implemented via get_link_ksettings. When driver reports higher link mode 587 * bits, a kernel warning is logged once (with name of 1st driver/device) to 588 * recommend user to upgrade ethtool, but the command is successful (only the 589 * lower link mode bits reported back to user). Deprecated fields from 590 * ethtool_cmd (transceiver/maxrxpkt/maxtxpkt) are always set to zero. 591 */ 592 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr) 593 { 594 struct ethtool_link_ksettings link_ksettings; 595 struct ethtool_cmd cmd; 596 int err; 597 598 ASSERT_RTNL(); 599 if (!dev->ethtool_ops->get_link_ksettings) 600 return -EOPNOTSUPP; 601 602 memset(&link_ksettings, 0, sizeof(link_ksettings)); 603 err = dev->ethtool_ops->get_link_ksettings(dev, &link_ksettings); 604 if (err < 0) 605 return err; 606 convert_link_ksettings_to_legacy_settings(&cmd, &link_ksettings); 607 608 /* send a sensible cmd tag back to user */ 609 cmd.cmd = ETHTOOL_GSET; 610 611 if (copy_to_user(useraddr, &cmd, sizeof(cmd))) 612 return -EFAULT; 613 614 return 0; 615 } 616 617 /* Update device link settings with given ethtool_cmd. 618 * 619 * Backward compatibility note: for compatibility with legacy ethtool, this is 620 * now always implemented via set_link_settings. When user's request updates 621 * deprecated ethtool_cmd fields (transceiver/maxrxpkt/maxtxpkt), a kernel 622 * warning is logged once (with name of 1st driver/device) to recommend user to 623 * upgrade ethtool, and the request is rejected. 624 */ 625 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr) 626 { 627 struct ethtool_link_ksettings link_ksettings; 628 struct ethtool_cmd cmd; 629 int ret; 630 631 ASSERT_RTNL(); 632 633 if (copy_from_user(&cmd, useraddr, sizeof(cmd))) 634 return -EFAULT; 635 if (!dev->ethtool_ops->set_link_ksettings) 636 return -EOPNOTSUPP; 637 638 if (!convert_legacy_settings_to_link_ksettings(&link_ksettings, &cmd)) 639 return -EINVAL; 640 link_ksettings.base.link_mode_masks_nwords = 641 __ETHTOOL_LINK_MODE_MASK_NU32; 642 ret = dev->ethtool_ops->set_link_ksettings(dev, &link_ksettings); 643 if (ret >= 0) { 644 ethtool_notify(dev, ETHTOOL_MSG_LINKINFO_NTF, NULL); 645 ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL); 646 } 647 return ret; 648 } 649 650 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev, 651 void __user *useraddr) 652 { 653 struct ethtool_drvinfo info; 654 const struct ethtool_ops *ops = dev->ethtool_ops; 655 656 memset(&info, 0, sizeof(info)); 657 info.cmd = ETHTOOL_GDRVINFO; 658 if (ops->get_drvinfo) { 659 ops->get_drvinfo(dev, &info); 660 } else if (dev->dev.parent && dev->dev.parent->driver) { 661 strlcpy(info.bus_info, dev_name(dev->dev.parent), 662 sizeof(info.bus_info)); 663 strlcpy(info.driver, dev->dev.parent->driver->name, 664 sizeof(info.driver)); 665 } else { 666 return -EOPNOTSUPP; 667 } 668 669 /* 670 * this method of obtaining string set info is deprecated; 671 * Use ETHTOOL_GSSET_INFO instead. 672 */ 673 if (ops->get_sset_count) { 674 int rc; 675 676 rc = ops->get_sset_count(dev, ETH_SS_TEST); 677 if (rc >= 0) 678 info.testinfo_len = rc; 679 rc = ops->get_sset_count(dev, ETH_SS_STATS); 680 if (rc >= 0) 681 info.n_stats = rc; 682 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS); 683 if (rc >= 0) 684 info.n_priv_flags = rc; 685 } 686 if (ops->get_regs_len) { 687 int ret = ops->get_regs_len(dev); 688 689 if (ret > 0) 690 info.regdump_len = ret; 691 } 692 693 if (ops->get_eeprom_len) 694 info.eedump_len = ops->get_eeprom_len(dev); 695 696 if (!info.fw_version[0]) 697 devlink_compat_running_version(dev, info.fw_version, 698 sizeof(info.fw_version)); 699 700 if (copy_to_user(useraddr, &info, sizeof(info))) 701 return -EFAULT; 702 return 0; 703 } 704 705 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev, 706 void __user *useraddr) 707 { 708 struct ethtool_sset_info info; 709 u64 sset_mask; 710 int i, idx = 0, n_bits = 0, ret, rc; 711 u32 *info_buf = NULL; 712 713 if (copy_from_user(&info, useraddr, sizeof(info))) 714 return -EFAULT; 715 716 /* store copy of mask, because we zero struct later on */ 717 sset_mask = info.sset_mask; 718 if (!sset_mask) 719 return 0; 720 721 /* calculate size of return buffer */ 722 n_bits = hweight64(sset_mask); 723 724 memset(&info, 0, sizeof(info)); 725 info.cmd = ETHTOOL_GSSET_INFO; 726 727 info_buf = kcalloc(n_bits, sizeof(u32), GFP_USER); 728 if (!info_buf) 729 return -ENOMEM; 730 731 /* 732 * fill return buffer based on input bitmask and successful 733 * get_sset_count return 734 */ 735 for (i = 0; i < 64; i++) { 736 if (!(sset_mask & (1ULL << i))) 737 continue; 738 739 rc = __ethtool_get_sset_count(dev, i); 740 if (rc >= 0) { 741 info.sset_mask |= (1ULL << i); 742 info_buf[idx++] = rc; 743 } 744 } 745 746 ret = -EFAULT; 747 if (copy_to_user(useraddr, &info, sizeof(info))) 748 goto out; 749 750 useraddr += offsetof(struct ethtool_sset_info, data); 751 if (copy_to_user(useraddr, info_buf, idx * sizeof(u32))) 752 goto out; 753 754 ret = 0; 755 756 out: 757 kfree(info_buf); 758 return ret; 759 } 760 761 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, 762 u32 cmd, void __user *useraddr) 763 { 764 struct ethtool_rxnfc info; 765 size_t info_size = sizeof(info); 766 int rc; 767 768 if (!dev->ethtool_ops->set_rxnfc) 769 return -EOPNOTSUPP; 770 771 /* struct ethtool_rxnfc was originally defined for 772 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 773 * members. User-space might still be using that 774 * definition. */ 775 if (cmd == ETHTOOL_SRXFH) 776 info_size = (offsetof(struct ethtool_rxnfc, data) + 777 sizeof(info.data)); 778 779 if (copy_from_user(&info, useraddr, info_size)) 780 return -EFAULT; 781 782 rc = dev->ethtool_ops->set_rxnfc(dev, &info); 783 if (rc) 784 return rc; 785 786 if (cmd == ETHTOOL_SRXCLSRLINS && 787 copy_to_user(useraddr, &info, info_size)) 788 return -EFAULT; 789 790 return 0; 791 } 792 793 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, 794 u32 cmd, void __user *useraddr) 795 { 796 struct ethtool_rxnfc info; 797 size_t info_size = sizeof(info); 798 const struct ethtool_ops *ops = dev->ethtool_ops; 799 int ret; 800 void *rule_buf = NULL; 801 802 if (!ops->get_rxnfc) 803 return -EOPNOTSUPP; 804 805 /* struct ethtool_rxnfc was originally defined for 806 * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data 807 * members. User-space might still be using that 808 * definition. */ 809 if (cmd == ETHTOOL_GRXFH) 810 info_size = (offsetof(struct ethtool_rxnfc, data) + 811 sizeof(info.data)); 812 813 if (copy_from_user(&info, useraddr, info_size)) 814 return -EFAULT; 815 816 /* If FLOW_RSS was requested then user-space must be using the 817 * new definition, as FLOW_RSS is newer. 818 */ 819 if (cmd == ETHTOOL_GRXFH && info.flow_type & FLOW_RSS) { 820 info_size = sizeof(info); 821 if (copy_from_user(&info, useraddr, info_size)) 822 return -EFAULT; 823 /* Since malicious users may modify the original data, 824 * we need to check whether FLOW_RSS is still requested. 825 */ 826 if (!(info.flow_type & FLOW_RSS)) 827 return -EINVAL; 828 } 829 830 if (info.cmd != cmd) 831 return -EINVAL; 832 833 if (info.cmd == ETHTOOL_GRXCLSRLALL) { 834 if (info.rule_cnt > 0) { 835 if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32)) 836 rule_buf = kcalloc(info.rule_cnt, sizeof(u32), 837 GFP_USER); 838 if (!rule_buf) 839 return -ENOMEM; 840 } 841 } 842 843 ret = ops->get_rxnfc(dev, &info, rule_buf); 844 if (ret < 0) 845 goto err_out; 846 847 ret = -EFAULT; 848 if (copy_to_user(useraddr, &info, info_size)) 849 goto err_out; 850 851 if (rule_buf) { 852 useraddr += offsetof(struct ethtool_rxnfc, rule_locs); 853 if (copy_to_user(useraddr, rule_buf, 854 info.rule_cnt * sizeof(u32))) 855 goto err_out; 856 } 857 ret = 0; 858 859 err_out: 860 kfree(rule_buf); 861 862 return ret; 863 } 864 865 static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr, 866 struct ethtool_rxnfc *rx_rings, 867 u32 size) 868 { 869 int i; 870 871 if (copy_from_user(indir, useraddr, size * sizeof(indir[0]))) 872 return -EFAULT; 873 874 /* Validate ring indices */ 875 for (i = 0; i < size; i++) 876 if (indir[i] >= rx_rings->data) 877 return -EINVAL; 878 879 return 0; 880 } 881 882 u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; 883 884 void netdev_rss_key_fill(void *buffer, size_t len) 885 { 886 BUG_ON(len > sizeof(netdev_rss_key)); 887 net_get_random_once(netdev_rss_key, sizeof(netdev_rss_key)); 888 memcpy(buffer, netdev_rss_key, len); 889 } 890 EXPORT_SYMBOL(netdev_rss_key_fill); 891 892 static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max) 893 { 894 u32 dev_size, current_max = 0; 895 u32 *indir; 896 int ret; 897 898 if (!dev->ethtool_ops->get_rxfh_indir_size || 899 !dev->ethtool_ops->get_rxfh) 900 return -EOPNOTSUPP; 901 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 902 if (dev_size == 0) 903 return -EOPNOTSUPP; 904 905 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 906 if (!indir) 907 return -ENOMEM; 908 909 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL); 910 if (ret) 911 goto out; 912 913 while (dev_size--) 914 current_max = max(current_max, indir[dev_size]); 915 916 *max = current_max; 917 918 out: 919 kfree(indir); 920 return ret; 921 } 922 923 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev, 924 void __user *useraddr) 925 { 926 u32 user_size, dev_size; 927 u32 *indir; 928 int ret; 929 930 if (!dev->ethtool_ops->get_rxfh_indir_size || 931 !dev->ethtool_ops->get_rxfh) 932 return -EOPNOTSUPP; 933 dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev); 934 if (dev_size == 0) 935 return -EOPNOTSUPP; 936 937 if (copy_from_user(&user_size, 938 useraddr + offsetof(struct ethtool_rxfh_indir, size), 939 sizeof(user_size))) 940 return -EFAULT; 941 942 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh_indir, size), 943 &dev_size, sizeof(dev_size))) 944 return -EFAULT; 945 946 /* If the user buffer size is 0, this is just a query for the 947 * device table size. Otherwise, if it's smaller than the 948 * device table size it's an error. 949 */ 950 if (user_size < dev_size) 951 return user_size == 0 ? 0 : -EINVAL; 952 953 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 954 if (!indir) 955 return -ENOMEM; 956 957 ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL); 958 if (ret) 959 goto out; 960 961 if (copy_to_user(useraddr + 962 offsetof(struct ethtool_rxfh_indir, ring_index[0]), 963 indir, dev_size * sizeof(indir[0]))) 964 ret = -EFAULT; 965 966 out: 967 kfree(indir); 968 return ret; 969 } 970 971 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev, 972 void __user *useraddr) 973 { 974 struct ethtool_rxnfc rx_rings; 975 u32 user_size, dev_size, i; 976 u32 *indir; 977 const struct ethtool_ops *ops = dev->ethtool_ops; 978 int ret; 979 u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]); 980 981 if (!ops->get_rxfh_indir_size || !ops->set_rxfh || 982 !ops->get_rxnfc) 983 return -EOPNOTSUPP; 984 985 dev_size = ops->get_rxfh_indir_size(dev); 986 if (dev_size == 0) 987 return -EOPNOTSUPP; 988 989 if (copy_from_user(&user_size, 990 useraddr + offsetof(struct ethtool_rxfh_indir, size), 991 sizeof(user_size))) 992 return -EFAULT; 993 994 if (user_size != 0 && user_size != dev_size) 995 return -EINVAL; 996 997 indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER); 998 if (!indir) 999 return -ENOMEM; 1000 1001 rx_rings.cmd = ETHTOOL_GRXRINGS; 1002 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1003 if (ret) 1004 goto out; 1005 1006 if (user_size == 0) { 1007 for (i = 0; i < dev_size; i++) 1008 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1009 } else { 1010 ret = ethtool_copy_validate_indir(indir, 1011 useraddr + ringidx_offset, 1012 &rx_rings, 1013 dev_size); 1014 if (ret) 1015 goto out; 1016 } 1017 1018 ret = ops->set_rxfh(dev, indir, NULL, ETH_RSS_HASH_NO_CHANGE); 1019 if (ret) 1020 goto out; 1021 1022 /* indicate whether rxfh was set to default */ 1023 if (user_size == 0) 1024 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1025 else 1026 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1027 1028 out: 1029 kfree(indir); 1030 return ret; 1031 } 1032 1033 static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev, 1034 void __user *useraddr) 1035 { 1036 int ret; 1037 const struct ethtool_ops *ops = dev->ethtool_ops; 1038 u32 user_indir_size, user_key_size; 1039 u32 dev_indir_size = 0, dev_key_size = 0; 1040 struct ethtool_rxfh rxfh; 1041 u32 total_size; 1042 u32 indir_bytes; 1043 u32 *indir = NULL; 1044 u8 dev_hfunc = 0; 1045 u8 *hkey = NULL; 1046 u8 *rss_config; 1047 1048 if (!ops->get_rxfh) 1049 return -EOPNOTSUPP; 1050 1051 if (ops->get_rxfh_indir_size) 1052 dev_indir_size = ops->get_rxfh_indir_size(dev); 1053 if (ops->get_rxfh_key_size) 1054 dev_key_size = ops->get_rxfh_key_size(dev); 1055 1056 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1057 return -EFAULT; 1058 user_indir_size = rxfh.indir_size; 1059 user_key_size = rxfh.key_size; 1060 1061 /* Check that reserved fields are 0 for now */ 1062 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1063 return -EINVAL; 1064 /* Most drivers don't handle rss_context, check it's 0 as well */ 1065 if (rxfh.rss_context && !ops->get_rxfh_context) 1066 return -EOPNOTSUPP; 1067 1068 rxfh.indir_size = dev_indir_size; 1069 rxfh.key_size = dev_key_size; 1070 if (copy_to_user(useraddr, &rxfh, sizeof(rxfh))) 1071 return -EFAULT; 1072 1073 if ((user_indir_size && (user_indir_size != dev_indir_size)) || 1074 (user_key_size && (user_key_size != dev_key_size))) 1075 return -EINVAL; 1076 1077 indir_bytes = user_indir_size * sizeof(indir[0]); 1078 total_size = indir_bytes + user_key_size; 1079 rss_config = kzalloc(total_size, GFP_USER); 1080 if (!rss_config) 1081 return -ENOMEM; 1082 1083 if (user_indir_size) 1084 indir = (u32 *)rss_config; 1085 1086 if (user_key_size) 1087 hkey = rss_config + indir_bytes; 1088 1089 if (rxfh.rss_context) 1090 ret = dev->ethtool_ops->get_rxfh_context(dev, indir, hkey, 1091 &dev_hfunc, 1092 rxfh.rss_context); 1093 else 1094 ret = dev->ethtool_ops->get_rxfh(dev, indir, hkey, &dev_hfunc); 1095 if (ret) 1096 goto out; 1097 1098 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, hfunc), 1099 &dev_hfunc, sizeof(rxfh.hfunc))) { 1100 ret = -EFAULT; 1101 } else if (copy_to_user(useraddr + 1102 offsetof(struct ethtool_rxfh, rss_config[0]), 1103 rss_config, total_size)) { 1104 ret = -EFAULT; 1105 } 1106 out: 1107 kfree(rss_config); 1108 1109 return ret; 1110 } 1111 1112 static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev, 1113 void __user *useraddr) 1114 { 1115 int ret; 1116 const struct ethtool_ops *ops = dev->ethtool_ops; 1117 struct ethtool_rxnfc rx_rings; 1118 struct ethtool_rxfh rxfh; 1119 u32 dev_indir_size = 0, dev_key_size = 0, i; 1120 u32 *indir = NULL, indir_bytes = 0; 1121 u8 *hkey = NULL; 1122 u8 *rss_config; 1123 u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]); 1124 bool delete = false; 1125 1126 if (!ops->get_rxnfc || !ops->set_rxfh) 1127 return -EOPNOTSUPP; 1128 1129 if (ops->get_rxfh_indir_size) 1130 dev_indir_size = ops->get_rxfh_indir_size(dev); 1131 if (ops->get_rxfh_key_size) 1132 dev_key_size = ops->get_rxfh_key_size(dev); 1133 1134 if (copy_from_user(&rxfh, useraddr, sizeof(rxfh))) 1135 return -EFAULT; 1136 1137 /* Check that reserved fields are 0 for now */ 1138 if (rxfh.rsvd8[0] || rxfh.rsvd8[1] || rxfh.rsvd8[2] || rxfh.rsvd32) 1139 return -EINVAL; 1140 /* Most drivers don't handle rss_context, check it's 0 as well */ 1141 if (rxfh.rss_context && !ops->set_rxfh_context) 1142 return -EOPNOTSUPP; 1143 1144 /* If either indir, hash key or function is valid, proceed further. 1145 * Must request at least one change: indir size, hash key or function. 1146 */ 1147 if ((rxfh.indir_size && 1148 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE && 1149 rxfh.indir_size != dev_indir_size) || 1150 (rxfh.key_size && (rxfh.key_size != dev_key_size)) || 1151 (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE && 1152 rxfh.key_size == 0 && rxfh.hfunc == ETH_RSS_HASH_NO_CHANGE)) 1153 return -EINVAL; 1154 1155 if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1156 indir_bytes = dev_indir_size * sizeof(indir[0]); 1157 1158 rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER); 1159 if (!rss_config) 1160 return -ENOMEM; 1161 1162 rx_rings.cmd = ETHTOOL_GRXRINGS; 1163 ret = ops->get_rxnfc(dev, &rx_rings, NULL); 1164 if (ret) 1165 goto out; 1166 1167 /* rxfh.indir_size == 0 means reset the indir table to default (master 1168 * context) or delete the context (other RSS contexts). 1169 * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged. 1170 */ 1171 if (rxfh.indir_size && 1172 rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) { 1173 indir = (u32 *)rss_config; 1174 ret = ethtool_copy_validate_indir(indir, 1175 useraddr + rss_cfg_offset, 1176 &rx_rings, 1177 rxfh.indir_size); 1178 if (ret) 1179 goto out; 1180 } else if (rxfh.indir_size == 0) { 1181 if (rxfh.rss_context == 0) { 1182 indir = (u32 *)rss_config; 1183 for (i = 0; i < dev_indir_size; i++) 1184 indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data); 1185 } else { 1186 delete = true; 1187 } 1188 } 1189 1190 if (rxfh.key_size) { 1191 hkey = rss_config + indir_bytes; 1192 if (copy_from_user(hkey, 1193 useraddr + rss_cfg_offset + indir_bytes, 1194 rxfh.key_size)) { 1195 ret = -EFAULT; 1196 goto out; 1197 } 1198 } 1199 1200 if (rxfh.rss_context) 1201 ret = ops->set_rxfh_context(dev, indir, hkey, rxfh.hfunc, 1202 &rxfh.rss_context, delete); 1203 else 1204 ret = ops->set_rxfh(dev, indir, hkey, rxfh.hfunc); 1205 if (ret) 1206 goto out; 1207 1208 if (copy_to_user(useraddr + offsetof(struct ethtool_rxfh, rss_context), 1209 &rxfh.rss_context, sizeof(rxfh.rss_context))) 1210 ret = -EFAULT; 1211 1212 if (!rxfh.rss_context) { 1213 /* indicate whether rxfh was set to default */ 1214 if (rxfh.indir_size == 0) 1215 dev->priv_flags &= ~IFF_RXFH_CONFIGURED; 1216 else if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) 1217 dev->priv_flags |= IFF_RXFH_CONFIGURED; 1218 } 1219 1220 out: 1221 kfree(rss_config); 1222 return ret; 1223 } 1224 1225 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) 1226 { 1227 struct ethtool_regs regs; 1228 const struct ethtool_ops *ops = dev->ethtool_ops; 1229 void *regbuf; 1230 int reglen, ret; 1231 1232 if (!ops->get_regs || !ops->get_regs_len) 1233 return -EOPNOTSUPP; 1234 1235 if (copy_from_user(®s, useraddr, sizeof(regs))) 1236 return -EFAULT; 1237 1238 reglen = ops->get_regs_len(dev); 1239 if (reglen <= 0) 1240 return reglen; 1241 1242 if (regs.len > reglen) 1243 regs.len = reglen; 1244 1245 regbuf = vzalloc(reglen); 1246 if (!regbuf) 1247 return -ENOMEM; 1248 1249 if (regs.len < reglen) 1250 reglen = regs.len; 1251 1252 ops->get_regs(dev, ®s, regbuf); 1253 1254 ret = -EFAULT; 1255 if (copy_to_user(useraddr, ®s, sizeof(regs))) 1256 goto out; 1257 useraddr += offsetof(struct ethtool_regs, data); 1258 if (copy_to_user(useraddr, regbuf, reglen)) 1259 goto out; 1260 ret = 0; 1261 1262 out: 1263 vfree(regbuf); 1264 return ret; 1265 } 1266 1267 static int ethtool_reset(struct net_device *dev, char __user *useraddr) 1268 { 1269 struct ethtool_value reset; 1270 int ret; 1271 1272 if (!dev->ethtool_ops->reset) 1273 return -EOPNOTSUPP; 1274 1275 if (copy_from_user(&reset, useraddr, sizeof(reset))) 1276 return -EFAULT; 1277 1278 ret = dev->ethtool_ops->reset(dev, &reset.data); 1279 if (ret) 1280 return ret; 1281 1282 if (copy_to_user(useraddr, &reset, sizeof(reset))) 1283 return -EFAULT; 1284 return 0; 1285 } 1286 1287 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr) 1288 { 1289 struct ethtool_wolinfo wol; 1290 1291 if (!dev->ethtool_ops->get_wol) 1292 return -EOPNOTSUPP; 1293 1294 memset(&wol, 0, sizeof(struct ethtool_wolinfo)); 1295 wol.cmd = ETHTOOL_GWOL; 1296 dev->ethtool_ops->get_wol(dev, &wol); 1297 1298 if (copy_to_user(useraddr, &wol, sizeof(wol))) 1299 return -EFAULT; 1300 return 0; 1301 } 1302 1303 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr) 1304 { 1305 struct ethtool_wolinfo wol; 1306 int ret; 1307 1308 if (!dev->ethtool_ops->set_wol) 1309 return -EOPNOTSUPP; 1310 1311 if (copy_from_user(&wol, useraddr, sizeof(wol))) 1312 return -EFAULT; 1313 1314 ret = dev->ethtool_ops->set_wol(dev, &wol); 1315 if (ret) 1316 return ret; 1317 1318 dev->wol_enabled = !!wol.wolopts; 1319 1320 return 0; 1321 } 1322 1323 static int ethtool_get_eee(struct net_device *dev, char __user *useraddr) 1324 { 1325 struct ethtool_eee edata; 1326 int rc; 1327 1328 if (!dev->ethtool_ops->get_eee) 1329 return -EOPNOTSUPP; 1330 1331 memset(&edata, 0, sizeof(struct ethtool_eee)); 1332 edata.cmd = ETHTOOL_GEEE; 1333 rc = dev->ethtool_ops->get_eee(dev, &edata); 1334 1335 if (rc) 1336 return rc; 1337 1338 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1339 return -EFAULT; 1340 1341 return 0; 1342 } 1343 1344 static int ethtool_set_eee(struct net_device *dev, char __user *useraddr) 1345 { 1346 struct ethtool_eee edata; 1347 1348 if (!dev->ethtool_ops->set_eee) 1349 return -EOPNOTSUPP; 1350 1351 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1352 return -EFAULT; 1353 1354 return dev->ethtool_ops->set_eee(dev, &edata); 1355 } 1356 1357 static int ethtool_nway_reset(struct net_device *dev) 1358 { 1359 if (!dev->ethtool_ops->nway_reset) 1360 return -EOPNOTSUPP; 1361 1362 return dev->ethtool_ops->nway_reset(dev); 1363 } 1364 1365 static int ethtool_get_link(struct net_device *dev, char __user *useraddr) 1366 { 1367 struct ethtool_value edata = { .cmd = ETHTOOL_GLINK }; 1368 int link = __ethtool_get_link(dev); 1369 1370 if (link < 0) 1371 return link; 1372 1373 edata.data = link; 1374 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1375 return -EFAULT; 1376 return 0; 1377 } 1378 1379 static int ethtool_get_any_eeprom(struct net_device *dev, void __user *useraddr, 1380 int (*getter)(struct net_device *, 1381 struct ethtool_eeprom *, u8 *), 1382 u32 total_len) 1383 { 1384 struct ethtool_eeprom eeprom; 1385 void __user *userbuf = useraddr + sizeof(eeprom); 1386 u32 bytes_remaining; 1387 u8 *data; 1388 int ret = 0; 1389 1390 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1391 return -EFAULT; 1392 1393 /* Check for wrap and zero */ 1394 if (eeprom.offset + eeprom.len <= eeprom.offset) 1395 return -EINVAL; 1396 1397 /* Check for exceeding total eeprom len */ 1398 if (eeprom.offset + eeprom.len > total_len) 1399 return -EINVAL; 1400 1401 data = kmalloc(PAGE_SIZE, GFP_USER); 1402 if (!data) 1403 return -ENOMEM; 1404 1405 bytes_remaining = eeprom.len; 1406 while (bytes_remaining > 0) { 1407 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1408 1409 ret = getter(dev, &eeprom, data); 1410 if (ret) 1411 break; 1412 if (copy_to_user(userbuf, data, eeprom.len)) { 1413 ret = -EFAULT; 1414 break; 1415 } 1416 userbuf += eeprom.len; 1417 eeprom.offset += eeprom.len; 1418 bytes_remaining -= eeprom.len; 1419 } 1420 1421 eeprom.len = userbuf - (useraddr + sizeof(eeprom)); 1422 eeprom.offset -= eeprom.len; 1423 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom))) 1424 ret = -EFAULT; 1425 1426 kfree(data); 1427 return ret; 1428 } 1429 1430 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr) 1431 { 1432 const struct ethtool_ops *ops = dev->ethtool_ops; 1433 1434 if (!ops->get_eeprom || !ops->get_eeprom_len || 1435 !ops->get_eeprom_len(dev)) 1436 return -EOPNOTSUPP; 1437 1438 return ethtool_get_any_eeprom(dev, useraddr, ops->get_eeprom, 1439 ops->get_eeprom_len(dev)); 1440 } 1441 1442 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr) 1443 { 1444 struct ethtool_eeprom eeprom; 1445 const struct ethtool_ops *ops = dev->ethtool_ops; 1446 void __user *userbuf = useraddr + sizeof(eeprom); 1447 u32 bytes_remaining; 1448 u8 *data; 1449 int ret = 0; 1450 1451 if (!ops->set_eeprom || !ops->get_eeprom_len || 1452 !ops->get_eeprom_len(dev)) 1453 return -EOPNOTSUPP; 1454 1455 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom))) 1456 return -EFAULT; 1457 1458 /* Check for wrap and zero */ 1459 if (eeprom.offset + eeprom.len <= eeprom.offset) 1460 return -EINVAL; 1461 1462 /* Check for exceeding total eeprom len */ 1463 if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev)) 1464 return -EINVAL; 1465 1466 data = kmalloc(PAGE_SIZE, GFP_USER); 1467 if (!data) 1468 return -ENOMEM; 1469 1470 bytes_remaining = eeprom.len; 1471 while (bytes_remaining > 0) { 1472 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE); 1473 1474 if (copy_from_user(data, userbuf, eeprom.len)) { 1475 ret = -EFAULT; 1476 break; 1477 } 1478 ret = ops->set_eeprom(dev, &eeprom, data); 1479 if (ret) 1480 break; 1481 userbuf += eeprom.len; 1482 eeprom.offset += eeprom.len; 1483 bytes_remaining -= eeprom.len; 1484 } 1485 1486 kfree(data); 1487 return ret; 1488 } 1489 1490 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev, 1491 void __user *useraddr) 1492 { 1493 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 1494 1495 if (!dev->ethtool_ops->get_coalesce) 1496 return -EOPNOTSUPP; 1497 1498 dev->ethtool_ops->get_coalesce(dev, &coalesce); 1499 1500 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 1501 return -EFAULT; 1502 return 0; 1503 } 1504 1505 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev, 1506 void __user *useraddr) 1507 { 1508 struct ethtool_coalesce coalesce; 1509 1510 if (!dev->ethtool_ops->set_coalesce) 1511 return -EOPNOTSUPP; 1512 1513 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) 1514 return -EFAULT; 1515 1516 return dev->ethtool_ops->set_coalesce(dev, &coalesce); 1517 } 1518 1519 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr) 1520 { 1521 struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM }; 1522 1523 if (!dev->ethtool_ops->get_ringparam) 1524 return -EOPNOTSUPP; 1525 1526 dev->ethtool_ops->get_ringparam(dev, &ringparam); 1527 1528 if (copy_to_user(useraddr, &ringparam, sizeof(ringparam))) 1529 return -EFAULT; 1530 return 0; 1531 } 1532 1533 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr) 1534 { 1535 struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM }; 1536 1537 if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam) 1538 return -EOPNOTSUPP; 1539 1540 if (copy_from_user(&ringparam, useraddr, sizeof(ringparam))) 1541 return -EFAULT; 1542 1543 dev->ethtool_ops->get_ringparam(dev, &max); 1544 1545 /* ensure new ring parameters are within the maximums */ 1546 if (ringparam.rx_pending > max.rx_max_pending || 1547 ringparam.rx_mini_pending > max.rx_mini_max_pending || 1548 ringparam.rx_jumbo_pending > max.rx_jumbo_max_pending || 1549 ringparam.tx_pending > max.tx_max_pending) 1550 return -EINVAL; 1551 1552 return dev->ethtool_ops->set_ringparam(dev, &ringparam); 1553 } 1554 1555 static noinline_for_stack int ethtool_get_channels(struct net_device *dev, 1556 void __user *useraddr) 1557 { 1558 struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS }; 1559 1560 if (!dev->ethtool_ops->get_channels) 1561 return -EOPNOTSUPP; 1562 1563 dev->ethtool_ops->get_channels(dev, &channels); 1564 1565 if (copy_to_user(useraddr, &channels, sizeof(channels))) 1566 return -EFAULT; 1567 return 0; 1568 } 1569 1570 static noinline_for_stack int ethtool_set_channels(struct net_device *dev, 1571 void __user *useraddr) 1572 { 1573 struct ethtool_channels channels, curr = { .cmd = ETHTOOL_GCHANNELS }; 1574 u16 from_channel, to_channel; 1575 u32 max_rx_in_use = 0; 1576 unsigned int i; 1577 1578 if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels) 1579 return -EOPNOTSUPP; 1580 1581 if (copy_from_user(&channels, useraddr, sizeof(channels))) 1582 return -EFAULT; 1583 1584 dev->ethtool_ops->get_channels(dev, &curr); 1585 1586 /* ensure new counts are within the maximums */ 1587 if (channels.rx_count > curr.max_rx || 1588 channels.tx_count > curr.max_tx || 1589 channels.combined_count > curr.max_combined || 1590 channels.other_count > curr.max_other) 1591 return -EINVAL; 1592 1593 /* ensure the new Rx count fits within the configured Rx flow 1594 * indirection table settings */ 1595 if (netif_is_rxfh_configured(dev) && 1596 !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) && 1597 (channels.combined_count + channels.rx_count) <= max_rx_in_use) 1598 return -EINVAL; 1599 1600 /* Disabling channels, query zero-copy AF_XDP sockets */ 1601 from_channel = channels.combined_count + 1602 min(channels.rx_count, channels.tx_count); 1603 to_channel = curr.combined_count + max(curr.rx_count, curr.tx_count); 1604 for (i = from_channel; i < to_channel; i++) 1605 if (xdp_get_umem_from_qid(dev, i)) 1606 return -EINVAL; 1607 1608 return dev->ethtool_ops->set_channels(dev, &channels); 1609 } 1610 1611 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr) 1612 { 1613 struct ethtool_pauseparam pauseparam = { .cmd = ETHTOOL_GPAUSEPARAM }; 1614 1615 if (!dev->ethtool_ops->get_pauseparam) 1616 return -EOPNOTSUPP; 1617 1618 dev->ethtool_ops->get_pauseparam(dev, &pauseparam); 1619 1620 if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam))) 1621 return -EFAULT; 1622 return 0; 1623 } 1624 1625 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr) 1626 { 1627 struct ethtool_pauseparam pauseparam; 1628 1629 if (!dev->ethtool_ops->set_pauseparam) 1630 return -EOPNOTSUPP; 1631 1632 if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam))) 1633 return -EFAULT; 1634 1635 return dev->ethtool_ops->set_pauseparam(dev, &pauseparam); 1636 } 1637 1638 static int ethtool_self_test(struct net_device *dev, char __user *useraddr) 1639 { 1640 struct ethtool_test test; 1641 const struct ethtool_ops *ops = dev->ethtool_ops; 1642 u64 *data; 1643 int ret, test_len; 1644 1645 if (!ops->self_test || !ops->get_sset_count) 1646 return -EOPNOTSUPP; 1647 1648 test_len = ops->get_sset_count(dev, ETH_SS_TEST); 1649 if (test_len < 0) 1650 return test_len; 1651 WARN_ON(test_len == 0); 1652 1653 if (copy_from_user(&test, useraddr, sizeof(test))) 1654 return -EFAULT; 1655 1656 test.len = test_len; 1657 data = kmalloc_array(test_len, sizeof(u64), GFP_USER); 1658 if (!data) 1659 return -ENOMEM; 1660 1661 ops->self_test(dev, &test, data); 1662 1663 ret = -EFAULT; 1664 if (copy_to_user(useraddr, &test, sizeof(test))) 1665 goto out; 1666 useraddr += sizeof(test); 1667 if (copy_to_user(useraddr, data, test.len * sizeof(u64))) 1668 goto out; 1669 ret = 0; 1670 1671 out: 1672 kfree(data); 1673 return ret; 1674 } 1675 1676 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr) 1677 { 1678 struct ethtool_gstrings gstrings; 1679 u8 *data; 1680 int ret; 1681 1682 if (copy_from_user(&gstrings, useraddr, sizeof(gstrings))) 1683 return -EFAULT; 1684 1685 ret = __ethtool_get_sset_count(dev, gstrings.string_set); 1686 if (ret < 0) 1687 return ret; 1688 if (ret > S32_MAX / ETH_GSTRING_LEN) 1689 return -ENOMEM; 1690 WARN_ON_ONCE(!ret); 1691 1692 gstrings.len = ret; 1693 1694 if (gstrings.len) { 1695 data = vzalloc(array_size(gstrings.len, ETH_GSTRING_LEN)); 1696 if (!data) 1697 return -ENOMEM; 1698 1699 __ethtool_get_strings(dev, gstrings.string_set, data); 1700 } else { 1701 data = NULL; 1702 } 1703 1704 ret = -EFAULT; 1705 if (copy_to_user(useraddr, &gstrings, sizeof(gstrings))) 1706 goto out; 1707 useraddr += sizeof(gstrings); 1708 if (gstrings.len && 1709 copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN)) 1710 goto out; 1711 ret = 0; 1712 1713 out: 1714 vfree(data); 1715 return ret; 1716 } 1717 1718 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) 1719 { 1720 struct ethtool_value id; 1721 static bool busy; 1722 const struct ethtool_ops *ops = dev->ethtool_ops; 1723 int rc; 1724 1725 if (!ops->set_phys_id) 1726 return -EOPNOTSUPP; 1727 1728 if (busy) 1729 return -EBUSY; 1730 1731 if (copy_from_user(&id, useraddr, sizeof(id))) 1732 return -EFAULT; 1733 1734 rc = ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); 1735 if (rc < 0) 1736 return rc; 1737 1738 /* Drop the RTNL lock while waiting, but prevent reentry or 1739 * removal of the device. 1740 */ 1741 busy = true; 1742 dev_hold(dev); 1743 rtnl_unlock(); 1744 1745 if (rc == 0) { 1746 /* Driver will handle this itself */ 1747 schedule_timeout_interruptible( 1748 id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT); 1749 } else { 1750 /* Driver expects to be called at twice the frequency in rc */ 1751 int n = rc * 2, i, interval = HZ / n; 1752 1753 /* Count down seconds */ 1754 do { 1755 /* Count down iterations per second */ 1756 i = n; 1757 do { 1758 rtnl_lock(); 1759 rc = ops->set_phys_id(dev, 1760 (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON); 1761 rtnl_unlock(); 1762 if (rc) 1763 break; 1764 schedule_timeout_interruptible(interval); 1765 } while (!signal_pending(current) && --i != 0); 1766 } while (!signal_pending(current) && 1767 (id.data == 0 || --id.data != 0)); 1768 } 1769 1770 rtnl_lock(); 1771 dev_put(dev); 1772 busy = false; 1773 1774 (void) ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); 1775 return rc; 1776 } 1777 1778 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) 1779 { 1780 struct ethtool_stats stats; 1781 const struct ethtool_ops *ops = dev->ethtool_ops; 1782 u64 *data; 1783 int ret, n_stats; 1784 1785 if (!ops->get_ethtool_stats || !ops->get_sset_count) 1786 return -EOPNOTSUPP; 1787 1788 n_stats = ops->get_sset_count(dev, ETH_SS_STATS); 1789 if (n_stats < 0) 1790 return n_stats; 1791 if (n_stats > S32_MAX / sizeof(u64)) 1792 return -ENOMEM; 1793 WARN_ON_ONCE(!n_stats); 1794 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1795 return -EFAULT; 1796 1797 stats.n_stats = n_stats; 1798 1799 if (n_stats) { 1800 data = vzalloc(array_size(n_stats, sizeof(u64))); 1801 if (!data) 1802 return -ENOMEM; 1803 ops->get_ethtool_stats(dev, &stats, data); 1804 } else { 1805 data = NULL; 1806 } 1807 1808 ret = -EFAULT; 1809 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1810 goto out; 1811 useraddr += sizeof(stats); 1812 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1813 goto out; 1814 ret = 0; 1815 1816 out: 1817 vfree(data); 1818 return ret; 1819 } 1820 1821 static int ethtool_get_phy_stats(struct net_device *dev, void __user *useraddr) 1822 { 1823 const struct ethtool_ops *ops = dev->ethtool_ops; 1824 struct phy_device *phydev = dev->phydev; 1825 struct ethtool_stats stats; 1826 u64 *data; 1827 int ret, n_stats; 1828 1829 if (!phydev && (!ops->get_ethtool_phy_stats || !ops->get_sset_count)) 1830 return -EOPNOTSUPP; 1831 1832 if (dev->phydev && !ops->get_ethtool_phy_stats) 1833 n_stats = phy_ethtool_get_sset_count(dev->phydev); 1834 else 1835 n_stats = ops->get_sset_count(dev, ETH_SS_PHY_STATS); 1836 if (n_stats < 0) 1837 return n_stats; 1838 if (n_stats > S32_MAX / sizeof(u64)) 1839 return -ENOMEM; 1840 WARN_ON_ONCE(!n_stats); 1841 1842 if (copy_from_user(&stats, useraddr, sizeof(stats))) 1843 return -EFAULT; 1844 1845 stats.n_stats = n_stats; 1846 1847 if (n_stats) { 1848 data = vzalloc(array_size(n_stats, sizeof(u64))); 1849 if (!data) 1850 return -ENOMEM; 1851 1852 if (dev->phydev && !ops->get_ethtool_phy_stats) { 1853 ret = phy_ethtool_get_stats(dev->phydev, &stats, data); 1854 if (ret < 0) 1855 goto out; 1856 } else { 1857 ops->get_ethtool_phy_stats(dev, &stats, data); 1858 } 1859 } else { 1860 data = NULL; 1861 } 1862 1863 ret = -EFAULT; 1864 if (copy_to_user(useraddr, &stats, sizeof(stats))) 1865 goto out; 1866 useraddr += sizeof(stats); 1867 if (n_stats && copy_to_user(useraddr, data, n_stats * sizeof(u64))) 1868 goto out; 1869 ret = 0; 1870 1871 out: 1872 vfree(data); 1873 return ret; 1874 } 1875 1876 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr) 1877 { 1878 struct ethtool_perm_addr epaddr; 1879 1880 if (copy_from_user(&epaddr, useraddr, sizeof(epaddr))) 1881 return -EFAULT; 1882 1883 if (epaddr.size < dev->addr_len) 1884 return -ETOOSMALL; 1885 epaddr.size = dev->addr_len; 1886 1887 if (copy_to_user(useraddr, &epaddr, sizeof(epaddr))) 1888 return -EFAULT; 1889 useraddr += sizeof(epaddr); 1890 if (copy_to_user(useraddr, dev->perm_addr, epaddr.size)) 1891 return -EFAULT; 1892 return 0; 1893 } 1894 1895 static int ethtool_get_value(struct net_device *dev, char __user *useraddr, 1896 u32 cmd, u32 (*actor)(struct net_device *)) 1897 { 1898 struct ethtool_value edata = { .cmd = cmd }; 1899 1900 if (!actor) 1901 return -EOPNOTSUPP; 1902 1903 edata.data = actor(dev); 1904 1905 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1906 return -EFAULT; 1907 return 0; 1908 } 1909 1910 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr, 1911 void (*actor)(struct net_device *, u32)) 1912 { 1913 struct ethtool_value edata; 1914 1915 if (!actor) 1916 return -EOPNOTSUPP; 1917 1918 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1919 return -EFAULT; 1920 1921 actor(dev, edata.data); 1922 return 0; 1923 } 1924 1925 static int ethtool_set_value(struct net_device *dev, char __user *useraddr, 1926 int (*actor)(struct net_device *, u32)) 1927 { 1928 struct ethtool_value edata; 1929 1930 if (!actor) 1931 return -EOPNOTSUPP; 1932 1933 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1934 return -EFAULT; 1935 1936 return actor(dev, edata.data); 1937 } 1938 1939 static noinline_for_stack int ethtool_flash_device(struct net_device *dev, 1940 char __user *useraddr) 1941 { 1942 struct ethtool_flash efl; 1943 1944 if (copy_from_user(&efl, useraddr, sizeof(efl))) 1945 return -EFAULT; 1946 efl.data[ETHTOOL_FLASH_MAX_FILENAME - 1] = 0; 1947 1948 if (!dev->ethtool_ops->flash_device) 1949 return devlink_compat_flash_update(dev, efl.data); 1950 1951 return dev->ethtool_ops->flash_device(dev, &efl); 1952 } 1953 1954 static int ethtool_set_dump(struct net_device *dev, 1955 void __user *useraddr) 1956 { 1957 struct ethtool_dump dump; 1958 1959 if (!dev->ethtool_ops->set_dump) 1960 return -EOPNOTSUPP; 1961 1962 if (copy_from_user(&dump, useraddr, sizeof(dump))) 1963 return -EFAULT; 1964 1965 return dev->ethtool_ops->set_dump(dev, &dump); 1966 } 1967 1968 static int ethtool_get_dump_flag(struct net_device *dev, 1969 void __user *useraddr) 1970 { 1971 int ret; 1972 struct ethtool_dump dump; 1973 const struct ethtool_ops *ops = dev->ethtool_ops; 1974 1975 if (!ops->get_dump_flag) 1976 return -EOPNOTSUPP; 1977 1978 if (copy_from_user(&dump, useraddr, sizeof(dump))) 1979 return -EFAULT; 1980 1981 ret = ops->get_dump_flag(dev, &dump); 1982 if (ret) 1983 return ret; 1984 1985 if (copy_to_user(useraddr, &dump, sizeof(dump))) 1986 return -EFAULT; 1987 return 0; 1988 } 1989 1990 static int ethtool_get_dump_data(struct net_device *dev, 1991 void __user *useraddr) 1992 { 1993 int ret; 1994 __u32 len; 1995 struct ethtool_dump dump, tmp; 1996 const struct ethtool_ops *ops = dev->ethtool_ops; 1997 void *data = NULL; 1998 1999 if (!ops->get_dump_data || !ops->get_dump_flag) 2000 return -EOPNOTSUPP; 2001 2002 if (copy_from_user(&dump, useraddr, sizeof(dump))) 2003 return -EFAULT; 2004 2005 memset(&tmp, 0, sizeof(tmp)); 2006 tmp.cmd = ETHTOOL_GET_DUMP_FLAG; 2007 ret = ops->get_dump_flag(dev, &tmp); 2008 if (ret) 2009 return ret; 2010 2011 len = min(tmp.len, dump.len); 2012 if (!len) 2013 return -EFAULT; 2014 2015 /* Don't ever let the driver think there's more space available 2016 * than it requested with .get_dump_flag(). 2017 */ 2018 dump.len = len; 2019 2020 /* Always allocate enough space to hold the whole thing so that the 2021 * driver does not need to check the length and bother with partial 2022 * dumping. 2023 */ 2024 data = vzalloc(tmp.len); 2025 if (!data) 2026 return -ENOMEM; 2027 ret = ops->get_dump_data(dev, &dump, data); 2028 if (ret) 2029 goto out; 2030 2031 /* There are two sane possibilities: 2032 * 1. The driver's .get_dump_data() does not touch dump.len. 2033 * 2. Or it may set dump.len to how much it really writes, which 2034 * should be tmp.len (or len if it can do a partial dump). 2035 * In any case respond to userspace with the actual length of data 2036 * it's receiving. 2037 */ 2038 WARN_ON(dump.len != len && dump.len != tmp.len); 2039 dump.len = len; 2040 2041 if (copy_to_user(useraddr, &dump, sizeof(dump))) { 2042 ret = -EFAULT; 2043 goto out; 2044 } 2045 useraddr += offsetof(struct ethtool_dump, data); 2046 if (copy_to_user(useraddr, data, len)) 2047 ret = -EFAULT; 2048 out: 2049 vfree(data); 2050 return ret; 2051 } 2052 2053 static int ethtool_get_ts_info(struct net_device *dev, void __user *useraddr) 2054 { 2055 int err = 0; 2056 struct ethtool_ts_info info; 2057 const struct ethtool_ops *ops = dev->ethtool_ops; 2058 struct phy_device *phydev = dev->phydev; 2059 2060 memset(&info, 0, sizeof(info)); 2061 info.cmd = ETHTOOL_GET_TS_INFO; 2062 2063 if (phy_has_tsinfo(phydev)) { 2064 err = phy_ts_info(phydev, &info); 2065 } else if (ops->get_ts_info) { 2066 err = ops->get_ts_info(dev, &info); 2067 } else { 2068 info.so_timestamping = 2069 SOF_TIMESTAMPING_RX_SOFTWARE | 2070 SOF_TIMESTAMPING_SOFTWARE; 2071 info.phc_index = -1; 2072 } 2073 2074 if (err) 2075 return err; 2076 2077 if (copy_to_user(useraddr, &info, sizeof(info))) 2078 err = -EFAULT; 2079 2080 return err; 2081 } 2082 2083 static int __ethtool_get_module_info(struct net_device *dev, 2084 struct ethtool_modinfo *modinfo) 2085 { 2086 const struct ethtool_ops *ops = dev->ethtool_ops; 2087 struct phy_device *phydev = dev->phydev; 2088 2089 if (dev->sfp_bus) 2090 return sfp_get_module_info(dev->sfp_bus, modinfo); 2091 2092 if (phydev && phydev->drv && phydev->drv->module_info) 2093 return phydev->drv->module_info(phydev, modinfo); 2094 2095 if (ops->get_module_info) 2096 return ops->get_module_info(dev, modinfo); 2097 2098 return -EOPNOTSUPP; 2099 } 2100 2101 static int ethtool_get_module_info(struct net_device *dev, 2102 void __user *useraddr) 2103 { 2104 int ret; 2105 struct ethtool_modinfo modinfo; 2106 2107 if (copy_from_user(&modinfo, useraddr, sizeof(modinfo))) 2108 return -EFAULT; 2109 2110 ret = __ethtool_get_module_info(dev, &modinfo); 2111 if (ret) 2112 return ret; 2113 2114 if (copy_to_user(useraddr, &modinfo, sizeof(modinfo))) 2115 return -EFAULT; 2116 2117 return 0; 2118 } 2119 2120 static int __ethtool_get_module_eeprom(struct net_device *dev, 2121 struct ethtool_eeprom *ee, u8 *data) 2122 { 2123 const struct ethtool_ops *ops = dev->ethtool_ops; 2124 struct phy_device *phydev = dev->phydev; 2125 2126 if (dev->sfp_bus) 2127 return sfp_get_module_eeprom(dev->sfp_bus, ee, data); 2128 2129 if (phydev && phydev->drv && phydev->drv->module_eeprom) 2130 return phydev->drv->module_eeprom(phydev, ee, data); 2131 2132 if (ops->get_module_eeprom) 2133 return ops->get_module_eeprom(dev, ee, data); 2134 2135 return -EOPNOTSUPP; 2136 } 2137 2138 static int ethtool_get_module_eeprom(struct net_device *dev, 2139 void __user *useraddr) 2140 { 2141 int ret; 2142 struct ethtool_modinfo modinfo; 2143 2144 ret = __ethtool_get_module_info(dev, &modinfo); 2145 if (ret) 2146 return ret; 2147 2148 return ethtool_get_any_eeprom(dev, useraddr, 2149 __ethtool_get_module_eeprom, 2150 modinfo.eeprom_len); 2151 } 2152 2153 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna) 2154 { 2155 switch (tuna->id) { 2156 case ETHTOOL_RX_COPYBREAK: 2157 case ETHTOOL_TX_COPYBREAK: 2158 if (tuna->len != sizeof(u32) || 2159 tuna->type_id != ETHTOOL_TUNABLE_U32) 2160 return -EINVAL; 2161 break; 2162 case ETHTOOL_PFC_PREVENTION_TOUT: 2163 if (tuna->len != sizeof(u16) || 2164 tuna->type_id != ETHTOOL_TUNABLE_U16) 2165 return -EINVAL; 2166 break; 2167 default: 2168 return -EINVAL; 2169 } 2170 2171 return 0; 2172 } 2173 2174 static int ethtool_get_tunable(struct net_device *dev, void __user *useraddr) 2175 { 2176 int ret; 2177 struct ethtool_tunable tuna; 2178 const struct ethtool_ops *ops = dev->ethtool_ops; 2179 void *data; 2180 2181 if (!ops->get_tunable) 2182 return -EOPNOTSUPP; 2183 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2184 return -EFAULT; 2185 ret = ethtool_tunable_valid(&tuna); 2186 if (ret) 2187 return ret; 2188 data = kmalloc(tuna.len, GFP_USER); 2189 if (!data) 2190 return -ENOMEM; 2191 ret = ops->get_tunable(dev, &tuna, data); 2192 if (ret) 2193 goto out; 2194 useraddr += sizeof(tuna); 2195 ret = -EFAULT; 2196 if (copy_to_user(useraddr, data, tuna.len)) 2197 goto out; 2198 ret = 0; 2199 2200 out: 2201 kfree(data); 2202 return ret; 2203 } 2204 2205 static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) 2206 { 2207 int ret; 2208 struct ethtool_tunable tuna; 2209 const struct ethtool_ops *ops = dev->ethtool_ops; 2210 void *data; 2211 2212 if (!ops->set_tunable) 2213 return -EOPNOTSUPP; 2214 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2215 return -EFAULT; 2216 ret = ethtool_tunable_valid(&tuna); 2217 if (ret) 2218 return ret; 2219 useraddr += sizeof(tuna); 2220 data = memdup_user(useraddr, tuna.len); 2221 if (IS_ERR(data)) 2222 return PTR_ERR(data); 2223 ret = ops->set_tunable(dev, &tuna, data); 2224 2225 kfree(data); 2226 return ret; 2227 } 2228 2229 static noinline_for_stack int 2230 ethtool_get_per_queue_coalesce(struct net_device *dev, 2231 void __user *useraddr, 2232 struct ethtool_per_queue_op *per_queue_opt) 2233 { 2234 u32 bit; 2235 int ret; 2236 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2237 2238 if (!dev->ethtool_ops->get_per_queue_coalesce) 2239 return -EOPNOTSUPP; 2240 2241 useraddr += sizeof(*per_queue_opt); 2242 2243 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, 2244 MAX_NUM_QUEUE); 2245 2246 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2247 struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE }; 2248 2249 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, &coalesce); 2250 if (ret != 0) 2251 return ret; 2252 if (copy_to_user(useraddr, &coalesce, sizeof(coalesce))) 2253 return -EFAULT; 2254 useraddr += sizeof(coalesce); 2255 } 2256 2257 return 0; 2258 } 2259 2260 static noinline_for_stack int 2261 ethtool_set_per_queue_coalesce(struct net_device *dev, 2262 void __user *useraddr, 2263 struct ethtool_per_queue_op *per_queue_opt) 2264 { 2265 u32 bit; 2266 int i, ret = 0; 2267 int n_queue; 2268 struct ethtool_coalesce *backup = NULL, *tmp = NULL; 2269 DECLARE_BITMAP(queue_mask, MAX_NUM_QUEUE); 2270 2271 if ((!dev->ethtool_ops->set_per_queue_coalesce) || 2272 (!dev->ethtool_ops->get_per_queue_coalesce)) 2273 return -EOPNOTSUPP; 2274 2275 useraddr += sizeof(*per_queue_opt); 2276 2277 bitmap_from_arr32(queue_mask, per_queue_opt->queue_mask, MAX_NUM_QUEUE); 2278 n_queue = bitmap_weight(queue_mask, MAX_NUM_QUEUE); 2279 tmp = backup = kmalloc_array(n_queue, sizeof(*backup), GFP_KERNEL); 2280 if (!backup) 2281 return -ENOMEM; 2282 2283 for_each_set_bit(bit, queue_mask, MAX_NUM_QUEUE) { 2284 struct ethtool_coalesce coalesce; 2285 2286 ret = dev->ethtool_ops->get_per_queue_coalesce(dev, bit, tmp); 2287 if (ret != 0) 2288 goto roll_back; 2289 2290 tmp++; 2291 2292 if (copy_from_user(&coalesce, useraddr, sizeof(coalesce))) { 2293 ret = -EFAULT; 2294 goto roll_back; 2295 } 2296 2297 ret = dev->ethtool_ops->set_per_queue_coalesce(dev, bit, &coalesce); 2298 if (ret != 0) 2299 goto roll_back; 2300 2301 useraddr += sizeof(coalesce); 2302 } 2303 2304 roll_back: 2305 if (ret != 0) { 2306 tmp = backup; 2307 for_each_set_bit(i, queue_mask, bit) { 2308 dev->ethtool_ops->set_per_queue_coalesce(dev, i, tmp); 2309 tmp++; 2310 } 2311 } 2312 kfree(backup); 2313 2314 return ret; 2315 } 2316 2317 static int noinline_for_stack ethtool_set_per_queue(struct net_device *dev, 2318 void __user *useraddr, u32 sub_cmd) 2319 { 2320 struct ethtool_per_queue_op per_queue_opt; 2321 2322 if (copy_from_user(&per_queue_opt, useraddr, sizeof(per_queue_opt))) 2323 return -EFAULT; 2324 2325 if (per_queue_opt.sub_command != sub_cmd) 2326 return -EINVAL; 2327 2328 switch (per_queue_opt.sub_command) { 2329 case ETHTOOL_GCOALESCE: 2330 return ethtool_get_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2331 case ETHTOOL_SCOALESCE: 2332 return ethtool_set_per_queue_coalesce(dev, useraddr, &per_queue_opt); 2333 default: 2334 return -EOPNOTSUPP; 2335 }; 2336 } 2337 2338 static int ethtool_phy_tunable_valid(const struct ethtool_tunable *tuna) 2339 { 2340 switch (tuna->id) { 2341 case ETHTOOL_PHY_DOWNSHIFT: 2342 case ETHTOOL_PHY_FAST_LINK_DOWN: 2343 if (tuna->len != sizeof(u8) || 2344 tuna->type_id != ETHTOOL_TUNABLE_U8) 2345 return -EINVAL; 2346 break; 2347 case ETHTOOL_PHY_EDPD: 2348 if (tuna->len != sizeof(u16) || 2349 tuna->type_id != ETHTOOL_TUNABLE_U16) 2350 return -EINVAL; 2351 break; 2352 default: 2353 return -EINVAL; 2354 } 2355 2356 return 0; 2357 } 2358 2359 static int get_phy_tunable(struct net_device *dev, void __user *useraddr) 2360 { 2361 int ret; 2362 struct ethtool_tunable tuna; 2363 struct phy_device *phydev = dev->phydev; 2364 void *data; 2365 2366 if (!(phydev && phydev->drv && phydev->drv->get_tunable)) 2367 return -EOPNOTSUPP; 2368 2369 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2370 return -EFAULT; 2371 ret = ethtool_phy_tunable_valid(&tuna); 2372 if (ret) 2373 return ret; 2374 data = kmalloc(tuna.len, GFP_USER); 2375 if (!data) 2376 return -ENOMEM; 2377 mutex_lock(&phydev->lock); 2378 ret = phydev->drv->get_tunable(phydev, &tuna, data); 2379 mutex_unlock(&phydev->lock); 2380 if (ret) 2381 goto out; 2382 useraddr += sizeof(tuna); 2383 ret = -EFAULT; 2384 if (copy_to_user(useraddr, data, tuna.len)) 2385 goto out; 2386 ret = 0; 2387 2388 out: 2389 kfree(data); 2390 return ret; 2391 } 2392 2393 static int set_phy_tunable(struct net_device *dev, void __user *useraddr) 2394 { 2395 int ret; 2396 struct ethtool_tunable tuna; 2397 struct phy_device *phydev = dev->phydev; 2398 void *data; 2399 2400 if (!(phydev && phydev->drv && phydev->drv->set_tunable)) 2401 return -EOPNOTSUPP; 2402 if (copy_from_user(&tuna, useraddr, sizeof(tuna))) 2403 return -EFAULT; 2404 ret = ethtool_phy_tunable_valid(&tuna); 2405 if (ret) 2406 return ret; 2407 useraddr += sizeof(tuna); 2408 data = memdup_user(useraddr, tuna.len); 2409 if (IS_ERR(data)) 2410 return PTR_ERR(data); 2411 mutex_lock(&phydev->lock); 2412 ret = phydev->drv->set_tunable(phydev, &tuna, data); 2413 mutex_unlock(&phydev->lock); 2414 2415 kfree(data); 2416 return ret; 2417 } 2418 2419 static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr) 2420 { 2421 struct ethtool_fecparam fecparam = { .cmd = ETHTOOL_GFECPARAM }; 2422 int rc; 2423 2424 if (!dev->ethtool_ops->get_fecparam) 2425 return -EOPNOTSUPP; 2426 2427 rc = dev->ethtool_ops->get_fecparam(dev, &fecparam); 2428 if (rc) 2429 return rc; 2430 2431 if (copy_to_user(useraddr, &fecparam, sizeof(fecparam))) 2432 return -EFAULT; 2433 return 0; 2434 } 2435 2436 static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr) 2437 { 2438 struct ethtool_fecparam fecparam; 2439 2440 if (!dev->ethtool_ops->set_fecparam) 2441 return -EOPNOTSUPP; 2442 2443 if (copy_from_user(&fecparam, useraddr, sizeof(fecparam))) 2444 return -EFAULT; 2445 2446 return dev->ethtool_ops->set_fecparam(dev, &fecparam); 2447 } 2448 2449 /* The main entry point in this file. Called from net/core/dev_ioctl.c */ 2450 2451 int dev_ethtool(struct net *net, struct ifreq *ifr) 2452 { 2453 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 2454 void __user *useraddr = ifr->ifr_data; 2455 u32 ethcmd, sub_cmd; 2456 int rc; 2457 netdev_features_t old_features; 2458 2459 if (!dev || !netif_device_present(dev)) 2460 return -ENODEV; 2461 2462 if (copy_from_user(ðcmd, useraddr, sizeof(ethcmd))) 2463 return -EFAULT; 2464 2465 if (ethcmd == ETHTOOL_PERQUEUE) { 2466 if (copy_from_user(&sub_cmd, useraddr + sizeof(ethcmd), sizeof(sub_cmd))) 2467 return -EFAULT; 2468 } else { 2469 sub_cmd = ethcmd; 2470 } 2471 /* Allow some commands to be done by anyone */ 2472 switch (sub_cmd) { 2473 case ETHTOOL_GSET: 2474 case ETHTOOL_GDRVINFO: 2475 case ETHTOOL_GMSGLVL: 2476 case ETHTOOL_GLINK: 2477 case ETHTOOL_GCOALESCE: 2478 case ETHTOOL_GRINGPARAM: 2479 case ETHTOOL_GPAUSEPARAM: 2480 case ETHTOOL_GRXCSUM: 2481 case ETHTOOL_GTXCSUM: 2482 case ETHTOOL_GSG: 2483 case ETHTOOL_GSSET_INFO: 2484 case ETHTOOL_GSTRINGS: 2485 case ETHTOOL_GSTATS: 2486 case ETHTOOL_GPHYSTATS: 2487 case ETHTOOL_GTSO: 2488 case ETHTOOL_GPERMADDR: 2489 case ETHTOOL_GUFO: 2490 case ETHTOOL_GGSO: 2491 case ETHTOOL_GGRO: 2492 case ETHTOOL_GFLAGS: 2493 case ETHTOOL_GPFLAGS: 2494 case ETHTOOL_GRXFH: 2495 case ETHTOOL_GRXRINGS: 2496 case ETHTOOL_GRXCLSRLCNT: 2497 case ETHTOOL_GRXCLSRULE: 2498 case ETHTOOL_GRXCLSRLALL: 2499 case ETHTOOL_GRXFHINDIR: 2500 case ETHTOOL_GRSSH: 2501 case ETHTOOL_GFEATURES: 2502 case ETHTOOL_GCHANNELS: 2503 case ETHTOOL_GET_TS_INFO: 2504 case ETHTOOL_GEEE: 2505 case ETHTOOL_GTUNABLE: 2506 case ETHTOOL_PHY_GTUNABLE: 2507 case ETHTOOL_GLINKSETTINGS: 2508 case ETHTOOL_GFECPARAM: 2509 break; 2510 default: 2511 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 2512 return -EPERM; 2513 } 2514 2515 if (dev->ethtool_ops->begin) { 2516 rc = dev->ethtool_ops->begin(dev); 2517 if (rc < 0) 2518 return rc; 2519 } 2520 old_features = dev->features; 2521 2522 switch (ethcmd) { 2523 case ETHTOOL_GSET: 2524 rc = ethtool_get_settings(dev, useraddr); 2525 break; 2526 case ETHTOOL_SSET: 2527 rc = ethtool_set_settings(dev, useraddr); 2528 break; 2529 case ETHTOOL_GDRVINFO: 2530 rc = ethtool_get_drvinfo(dev, useraddr); 2531 break; 2532 case ETHTOOL_GREGS: 2533 rc = ethtool_get_regs(dev, useraddr); 2534 break; 2535 case ETHTOOL_GWOL: 2536 rc = ethtool_get_wol(dev, useraddr); 2537 break; 2538 case ETHTOOL_SWOL: 2539 rc = ethtool_set_wol(dev, useraddr); 2540 break; 2541 case ETHTOOL_GMSGLVL: 2542 rc = ethtool_get_value(dev, useraddr, ethcmd, 2543 dev->ethtool_ops->get_msglevel); 2544 break; 2545 case ETHTOOL_SMSGLVL: 2546 rc = ethtool_set_value_void(dev, useraddr, 2547 dev->ethtool_ops->set_msglevel); 2548 break; 2549 case ETHTOOL_GEEE: 2550 rc = ethtool_get_eee(dev, useraddr); 2551 break; 2552 case ETHTOOL_SEEE: 2553 rc = ethtool_set_eee(dev, useraddr); 2554 break; 2555 case ETHTOOL_NWAY_RST: 2556 rc = ethtool_nway_reset(dev); 2557 break; 2558 case ETHTOOL_GLINK: 2559 rc = ethtool_get_link(dev, useraddr); 2560 break; 2561 case ETHTOOL_GEEPROM: 2562 rc = ethtool_get_eeprom(dev, useraddr); 2563 break; 2564 case ETHTOOL_SEEPROM: 2565 rc = ethtool_set_eeprom(dev, useraddr); 2566 break; 2567 case ETHTOOL_GCOALESCE: 2568 rc = ethtool_get_coalesce(dev, useraddr); 2569 break; 2570 case ETHTOOL_SCOALESCE: 2571 rc = ethtool_set_coalesce(dev, useraddr); 2572 break; 2573 case ETHTOOL_GRINGPARAM: 2574 rc = ethtool_get_ringparam(dev, useraddr); 2575 break; 2576 case ETHTOOL_SRINGPARAM: 2577 rc = ethtool_set_ringparam(dev, useraddr); 2578 break; 2579 case ETHTOOL_GPAUSEPARAM: 2580 rc = ethtool_get_pauseparam(dev, useraddr); 2581 break; 2582 case ETHTOOL_SPAUSEPARAM: 2583 rc = ethtool_set_pauseparam(dev, useraddr); 2584 break; 2585 case ETHTOOL_TEST: 2586 rc = ethtool_self_test(dev, useraddr); 2587 break; 2588 case ETHTOOL_GSTRINGS: 2589 rc = ethtool_get_strings(dev, useraddr); 2590 break; 2591 case ETHTOOL_PHYS_ID: 2592 rc = ethtool_phys_id(dev, useraddr); 2593 break; 2594 case ETHTOOL_GSTATS: 2595 rc = ethtool_get_stats(dev, useraddr); 2596 break; 2597 case ETHTOOL_GPERMADDR: 2598 rc = ethtool_get_perm_addr(dev, useraddr); 2599 break; 2600 case ETHTOOL_GFLAGS: 2601 rc = ethtool_get_value(dev, useraddr, ethcmd, 2602 __ethtool_get_flags); 2603 break; 2604 case ETHTOOL_SFLAGS: 2605 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags); 2606 break; 2607 case ETHTOOL_GPFLAGS: 2608 rc = ethtool_get_value(dev, useraddr, ethcmd, 2609 dev->ethtool_ops->get_priv_flags); 2610 break; 2611 case ETHTOOL_SPFLAGS: 2612 rc = ethtool_set_value(dev, useraddr, 2613 dev->ethtool_ops->set_priv_flags); 2614 break; 2615 case ETHTOOL_GRXFH: 2616 case ETHTOOL_GRXRINGS: 2617 case ETHTOOL_GRXCLSRLCNT: 2618 case ETHTOOL_GRXCLSRULE: 2619 case ETHTOOL_GRXCLSRLALL: 2620 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr); 2621 break; 2622 case ETHTOOL_SRXFH: 2623 case ETHTOOL_SRXCLSRLDEL: 2624 case ETHTOOL_SRXCLSRLINS: 2625 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr); 2626 break; 2627 case ETHTOOL_FLASHDEV: 2628 rc = ethtool_flash_device(dev, useraddr); 2629 break; 2630 case ETHTOOL_RESET: 2631 rc = ethtool_reset(dev, useraddr); 2632 break; 2633 case ETHTOOL_GSSET_INFO: 2634 rc = ethtool_get_sset_info(dev, useraddr); 2635 break; 2636 case ETHTOOL_GRXFHINDIR: 2637 rc = ethtool_get_rxfh_indir(dev, useraddr); 2638 break; 2639 case ETHTOOL_SRXFHINDIR: 2640 rc = ethtool_set_rxfh_indir(dev, useraddr); 2641 break; 2642 case ETHTOOL_GRSSH: 2643 rc = ethtool_get_rxfh(dev, useraddr); 2644 break; 2645 case ETHTOOL_SRSSH: 2646 rc = ethtool_set_rxfh(dev, useraddr); 2647 break; 2648 case ETHTOOL_GFEATURES: 2649 rc = ethtool_get_features(dev, useraddr); 2650 break; 2651 case ETHTOOL_SFEATURES: 2652 rc = ethtool_set_features(dev, useraddr); 2653 break; 2654 case ETHTOOL_GTXCSUM: 2655 case ETHTOOL_GRXCSUM: 2656 case ETHTOOL_GSG: 2657 case ETHTOOL_GTSO: 2658 case ETHTOOL_GGSO: 2659 case ETHTOOL_GGRO: 2660 rc = ethtool_get_one_feature(dev, useraddr, ethcmd); 2661 break; 2662 case ETHTOOL_STXCSUM: 2663 case ETHTOOL_SRXCSUM: 2664 case ETHTOOL_SSG: 2665 case ETHTOOL_STSO: 2666 case ETHTOOL_SGSO: 2667 case ETHTOOL_SGRO: 2668 rc = ethtool_set_one_feature(dev, useraddr, ethcmd); 2669 break; 2670 case ETHTOOL_GCHANNELS: 2671 rc = ethtool_get_channels(dev, useraddr); 2672 break; 2673 case ETHTOOL_SCHANNELS: 2674 rc = ethtool_set_channels(dev, useraddr); 2675 break; 2676 case ETHTOOL_SET_DUMP: 2677 rc = ethtool_set_dump(dev, useraddr); 2678 break; 2679 case ETHTOOL_GET_DUMP_FLAG: 2680 rc = ethtool_get_dump_flag(dev, useraddr); 2681 break; 2682 case ETHTOOL_GET_DUMP_DATA: 2683 rc = ethtool_get_dump_data(dev, useraddr); 2684 break; 2685 case ETHTOOL_GET_TS_INFO: 2686 rc = ethtool_get_ts_info(dev, useraddr); 2687 break; 2688 case ETHTOOL_GMODULEINFO: 2689 rc = ethtool_get_module_info(dev, useraddr); 2690 break; 2691 case ETHTOOL_GMODULEEEPROM: 2692 rc = ethtool_get_module_eeprom(dev, useraddr); 2693 break; 2694 case ETHTOOL_GTUNABLE: 2695 rc = ethtool_get_tunable(dev, useraddr); 2696 break; 2697 case ETHTOOL_STUNABLE: 2698 rc = ethtool_set_tunable(dev, useraddr); 2699 break; 2700 case ETHTOOL_GPHYSTATS: 2701 rc = ethtool_get_phy_stats(dev, useraddr); 2702 break; 2703 case ETHTOOL_PERQUEUE: 2704 rc = ethtool_set_per_queue(dev, useraddr, sub_cmd); 2705 break; 2706 case ETHTOOL_GLINKSETTINGS: 2707 rc = ethtool_get_link_ksettings(dev, useraddr); 2708 break; 2709 case ETHTOOL_SLINKSETTINGS: 2710 rc = ethtool_set_link_ksettings(dev, useraddr); 2711 break; 2712 case ETHTOOL_PHY_GTUNABLE: 2713 rc = get_phy_tunable(dev, useraddr); 2714 break; 2715 case ETHTOOL_PHY_STUNABLE: 2716 rc = set_phy_tunable(dev, useraddr); 2717 break; 2718 case ETHTOOL_GFECPARAM: 2719 rc = ethtool_get_fecparam(dev, useraddr); 2720 break; 2721 case ETHTOOL_SFECPARAM: 2722 rc = ethtool_set_fecparam(dev, useraddr); 2723 break; 2724 default: 2725 rc = -EOPNOTSUPP; 2726 } 2727 2728 if (dev->ethtool_ops->complete) 2729 dev->ethtool_ops->complete(dev); 2730 2731 if (old_features != dev->features) 2732 netdev_features_change(dev); 2733 2734 return rc; 2735 } 2736 2737 struct ethtool_rx_flow_key { 2738 struct flow_dissector_key_basic basic; 2739 union { 2740 struct flow_dissector_key_ipv4_addrs ipv4; 2741 struct flow_dissector_key_ipv6_addrs ipv6; 2742 }; 2743 struct flow_dissector_key_ports tp; 2744 struct flow_dissector_key_ip ip; 2745 struct flow_dissector_key_vlan vlan; 2746 struct flow_dissector_key_eth_addrs eth_addrs; 2747 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 2748 2749 struct ethtool_rx_flow_match { 2750 struct flow_dissector dissector; 2751 struct ethtool_rx_flow_key key; 2752 struct ethtool_rx_flow_key mask; 2753 }; 2754 2755 struct ethtool_rx_flow_rule * 2756 ethtool_rx_flow_rule_create(const struct ethtool_rx_flow_spec_input *input) 2757 { 2758 const struct ethtool_rx_flow_spec *fs = input->fs; 2759 static struct in6_addr zero_addr = {}; 2760 struct ethtool_rx_flow_match *match; 2761 struct ethtool_rx_flow_rule *flow; 2762 struct flow_action_entry *act; 2763 2764 flow = kzalloc(sizeof(struct ethtool_rx_flow_rule) + 2765 sizeof(struct ethtool_rx_flow_match), GFP_KERNEL); 2766 if (!flow) 2767 return ERR_PTR(-ENOMEM); 2768 2769 /* ethtool_rx supports only one single action per rule. */ 2770 flow->rule = flow_rule_alloc(1); 2771 if (!flow->rule) { 2772 kfree(flow); 2773 return ERR_PTR(-ENOMEM); 2774 } 2775 2776 match = (struct ethtool_rx_flow_match *)flow->priv; 2777 flow->rule->match.dissector = &match->dissector; 2778 flow->rule->match.mask = &match->mask; 2779 flow->rule->match.key = &match->key; 2780 2781 match->mask.basic.n_proto = htons(0xffff); 2782 2783 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2784 case ETHER_FLOW: { 2785 const struct ethhdr *ether_spec, *ether_m_spec; 2786 2787 ether_spec = &fs->h_u.ether_spec; 2788 ether_m_spec = &fs->m_u.ether_spec; 2789 2790 if (!is_zero_ether_addr(ether_m_spec->h_source)) { 2791 ether_addr_copy(match->key.eth_addrs.src, 2792 ether_spec->h_source); 2793 ether_addr_copy(match->mask.eth_addrs.src, 2794 ether_m_spec->h_source); 2795 } 2796 if (!is_zero_ether_addr(ether_m_spec->h_dest)) { 2797 ether_addr_copy(match->key.eth_addrs.dst, 2798 ether_spec->h_dest); 2799 ether_addr_copy(match->mask.eth_addrs.dst, 2800 ether_m_spec->h_dest); 2801 } 2802 if (ether_m_spec->h_proto) { 2803 match->key.basic.n_proto = ether_spec->h_proto; 2804 match->mask.basic.n_proto = ether_m_spec->h_proto; 2805 } 2806 } 2807 break; 2808 case TCP_V4_FLOW: 2809 case UDP_V4_FLOW: { 2810 const struct ethtool_tcpip4_spec *v4_spec, *v4_m_spec; 2811 2812 match->key.basic.n_proto = htons(ETH_P_IP); 2813 2814 v4_spec = &fs->h_u.tcp_ip4_spec; 2815 v4_m_spec = &fs->m_u.tcp_ip4_spec; 2816 2817 if (v4_m_spec->ip4src) { 2818 match->key.ipv4.src = v4_spec->ip4src; 2819 match->mask.ipv4.src = v4_m_spec->ip4src; 2820 } 2821 if (v4_m_spec->ip4dst) { 2822 match->key.ipv4.dst = v4_spec->ip4dst; 2823 match->mask.ipv4.dst = v4_m_spec->ip4dst; 2824 } 2825 if (v4_m_spec->ip4src || 2826 v4_m_spec->ip4dst) { 2827 match->dissector.used_keys |= 2828 BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS); 2829 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV4_ADDRS] = 2830 offsetof(struct ethtool_rx_flow_key, ipv4); 2831 } 2832 if (v4_m_spec->psrc) { 2833 match->key.tp.src = v4_spec->psrc; 2834 match->mask.tp.src = v4_m_spec->psrc; 2835 } 2836 if (v4_m_spec->pdst) { 2837 match->key.tp.dst = v4_spec->pdst; 2838 match->mask.tp.dst = v4_m_spec->pdst; 2839 } 2840 if (v4_m_spec->psrc || 2841 v4_m_spec->pdst) { 2842 match->dissector.used_keys |= 2843 BIT(FLOW_DISSECTOR_KEY_PORTS); 2844 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2845 offsetof(struct ethtool_rx_flow_key, tp); 2846 } 2847 if (v4_m_spec->tos) { 2848 match->key.ip.tos = v4_spec->tos; 2849 match->mask.ip.tos = v4_m_spec->tos; 2850 match->dissector.used_keys |= 2851 BIT(FLOW_DISSECTOR_KEY_IP); 2852 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2853 offsetof(struct ethtool_rx_flow_key, ip); 2854 } 2855 } 2856 break; 2857 case TCP_V6_FLOW: 2858 case UDP_V6_FLOW: { 2859 const struct ethtool_tcpip6_spec *v6_spec, *v6_m_spec; 2860 2861 match->key.basic.n_proto = htons(ETH_P_IPV6); 2862 2863 v6_spec = &fs->h_u.tcp_ip6_spec; 2864 v6_m_spec = &fs->m_u.tcp_ip6_spec; 2865 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2866 memcpy(&match->key.ipv6.src, v6_spec->ip6src, 2867 sizeof(match->key.ipv6.src)); 2868 memcpy(&match->mask.ipv6.src, v6_m_spec->ip6src, 2869 sizeof(match->mask.ipv6.src)); 2870 } 2871 if (memcmp(v6_m_spec->ip6dst, &zero_addr, sizeof(zero_addr))) { 2872 memcpy(&match->key.ipv6.dst, v6_spec->ip6dst, 2873 sizeof(match->key.ipv6.dst)); 2874 memcpy(&match->mask.ipv6.dst, v6_m_spec->ip6dst, 2875 sizeof(match->mask.ipv6.dst)); 2876 } 2877 if (memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr)) || 2878 memcmp(v6_m_spec->ip6src, &zero_addr, sizeof(zero_addr))) { 2879 match->dissector.used_keys |= 2880 BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS); 2881 match->dissector.offset[FLOW_DISSECTOR_KEY_IPV6_ADDRS] = 2882 offsetof(struct ethtool_rx_flow_key, ipv6); 2883 } 2884 if (v6_m_spec->psrc) { 2885 match->key.tp.src = v6_spec->psrc; 2886 match->mask.tp.src = v6_m_spec->psrc; 2887 } 2888 if (v6_m_spec->pdst) { 2889 match->key.tp.dst = v6_spec->pdst; 2890 match->mask.tp.dst = v6_m_spec->pdst; 2891 } 2892 if (v6_m_spec->psrc || 2893 v6_m_spec->pdst) { 2894 match->dissector.used_keys |= 2895 BIT(FLOW_DISSECTOR_KEY_PORTS); 2896 match->dissector.offset[FLOW_DISSECTOR_KEY_PORTS] = 2897 offsetof(struct ethtool_rx_flow_key, tp); 2898 } 2899 if (v6_m_spec->tclass) { 2900 match->key.ip.tos = v6_spec->tclass; 2901 match->mask.ip.tos = v6_m_spec->tclass; 2902 match->dissector.used_keys |= 2903 BIT(FLOW_DISSECTOR_KEY_IP); 2904 match->dissector.offset[FLOW_DISSECTOR_KEY_IP] = 2905 offsetof(struct ethtool_rx_flow_key, ip); 2906 } 2907 } 2908 break; 2909 default: 2910 ethtool_rx_flow_rule_destroy(flow); 2911 return ERR_PTR(-EINVAL); 2912 } 2913 2914 switch (fs->flow_type & ~(FLOW_EXT | FLOW_MAC_EXT | FLOW_RSS)) { 2915 case TCP_V4_FLOW: 2916 case TCP_V6_FLOW: 2917 match->key.basic.ip_proto = IPPROTO_TCP; 2918 break; 2919 case UDP_V4_FLOW: 2920 case UDP_V6_FLOW: 2921 match->key.basic.ip_proto = IPPROTO_UDP; 2922 break; 2923 } 2924 match->mask.basic.ip_proto = 0xff; 2925 2926 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_BASIC); 2927 match->dissector.offset[FLOW_DISSECTOR_KEY_BASIC] = 2928 offsetof(struct ethtool_rx_flow_key, basic); 2929 2930 if (fs->flow_type & FLOW_EXT) { 2931 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 2932 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 2933 2934 if (ext_m_spec->vlan_etype) { 2935 match->key.vlan.vlan_tpid = ext_h_spec->vlan_etype; 2936 match->mask.vlan.vlan_tpid = ext_m_spec->vlan_etype; 2937 } 2938 2939 if (ext_m_spec->vlan_tci) { 2940 match->key.vlan.vlan_id = 2941 ntohs(ext_h_spec->vlan_tci) & 0x0fff; 2942 match->mask.vlan.vlan_id = 2943 ntohs(ext_m_spec->vlan_tci) & 0x0fff; 2944 2945 match->key.vlan.vlan_dei = 2946 !!(ext_h_spec->vlan_tci & htons(0x1000)); 2947 match->mask.vlan.vlan_dei = 2948 !!(ext_m_spec->vlan_tci & htons(0x1000)); 2949 2950 match->key.vlan.vlan_priority = 2951 (ntohs(ext_h_spec->vlan_tci) & 0xe000) >> 13; 2952 match->mask.vlan.vlan_priority = 2953 (ntohs(ext_m_spec->vlan_tci) & 0xe000) >> 13; 2954 } 2955 2956 if (ext_m_spec->vlan_etype || 2957 ext_m_spec->vlan_tci) { 2958 match->dissector.used_keys |= 2959 BIT(FLOW_DISSECTOR_KEY_VLAN); 2960 match->dissector.offset[FLOW_DISSECTOR_KEY_VLAN] = 2961 offsetof(struct ethtool_rx_flow_key, vlan); 2962 } 2963 } 2964 if (fs->flow_type & FLOW_MAC_EXT) { 2965 const struct ethtool_flow_ext *ext_h_spec = &fs->h_ext; 2966 const struct ethtool_flow_ext *ext_m_spec = &fs->m_ext; 2967 2968 memcpy(match->key.eth_addrs.dst, ext_h_spec->h_dest, 2969 ETH_ALEN); 2970 memcpy(match->mask.eth_addrs.dst, ext_m_spec->h_dest, 2971 ETH_ALEN); 2972 2973 match->dissector.used_keys |= 2974 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS); 2975 match->dissector.offset[FLOW_DISSECTOR_KEY_ETH_ADDRS] = 2976 offsetof(struct ethtool_rx_flow_key, eth_addrs); 2977 } 2978 2979 act = &flow->rule->action.entries[0]; 2980 switch (fs->ring_cookie) { 2981 case RX_CLS_FLOW_DISC: 2982 act->id = FLOW_ACTION_DROP; 2983 break; 2984 case RX_CLS_FLOW_WAKE: 2985 act->id = FLOW_ACTION_WAKE; 2986 break; 2987 default: 2988 act->id = FLOW_ACTION_QUEUE; 2989 if (fs->flow_type & FLOW_RSS) 2990 act->queue.ctx = input->rss_ctx; 2991 2992 act->queue.vf = ethtool_get_flow_spec_ring_vf(fs->ring_cookie); 2993 act->queue.index = ethtool_get_flow_spec_ring(fs->ring_cookie); 2994 break; 2995 } 2996 2997 return flow; 2998 } 2999 EXPORT_SYMBOL(ethtool_rx_flow_rule_create); 3000 3001 void ethtool_rx_flow_rule_destroy(struct ethtool_rx_flow_rule *flow) 3002 { 3003 kfree(flow->rule); 3004 kfree(flow); 3005 } 3006 EXPORT_SYMBOL(ethtool_rx_flow_rule_destroy); 3007