1// SPDX-License-Identifier: GPL-2.0-only 2 3#include <net/sock.h> 4#include <linux/ethtool_netlink.h> 5#include <linux/pm_runtime.h> 6#include "netlink.h" 7 8static struct genl_family ethtool_genl_family; 9 10static bool ethnl_ok __read_mostly; 11static u32 ethnl_bcast_seq; 12 13#define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS | \ 14 ETHTOOL_FLAG_OMIT_REPLY) 15#define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS) 16 17const struct nla_policy ethnl_header_policy[] = { 18 [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, 19 [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, 20 .len = ALTIFNAMSIZ - 1 }, 21 [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32, 22 ETHTOOL_FLAGS_BASIC), 23}; 24 25const struct nla_policy ethnl_header_policy_stats[] = { 26 [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, 27 [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, 28 .len = ALTIFNAMSIZ - 1 }, 29 [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32, 30 ETHTOOL_FLAGS_STATS), 31}; 32 33int ethnl_ops_begin(struct net_device *dev) 34{ 35 int ret; 36 37 if (!dev) 38 return -ENODEV; 39 40 if (dev->dev.parent) 41 pm_runtime_get_sync(dev->dev.parent); 42 43 if (!netif_device_present(dev) || 44 dev->reg_state == NETREG_UNREGISTERING) { 45 ret = -ENODEV; 46 goto err; 47 } 48 49 if (dev->ethtool_ops->begin) { 50 ret = dev->ethtool_ops->begin(dev); 51 if (ret) 52 goto err; 53 } 54 55 return 0; 56err: 57 if (dev->dev.parent) 58 pm_runtime_put(dev->dev.parent); 59 60 return ret; 61} 62 63void ethnl_ops_complete(struct net_device *dev) 64{ 65 if (dev->ethtool_ops->complete) 66 dev->ethtool_ops->complete(dev); 67 68 if (dev->dev.parent) 69 pm_runtime_put(dev->dev.parent); 70} 71 72/** 73 * ethnl_parse_header_dev_get() - parse request header 74 * @req_info: structure to put results into 75 * @header: nest attribute with request header 76 * @net: request netns 77 * @extack: netlink extack for error reporting 78 * @require_dev: fail if no device identified in header 79 * 80 * Parse request header in nested attribute @nest and puts results into 81 * the structure pointed to by @req_info. Extack from @info is used for error 82 * reporting. If req_info->dev is not null on return, reference to it has 83 * been taken. If error is returned, *req_info is null initialized and no 84 * reference is held. 85 * 86 * Return: 0 on success or negative error code 87 */ 88int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, 89 const struct nlattr *header, struct net *net, 90 struct netlink_ext_ack *extack, bool require_dev) 91{ 92 struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)]; 93 const struct nlattr *devname_attr; 94 struct net_device *dev = NULL; 95 u32 flags = 0; 96 int ret; 97 98 if (!header) { 99 if (!require_dev) 100 return 0; 101 NL_SET_ERR_MSG(extack, "request header missing"); 102 return -EINVAL; 103 } 104 /* No validation here, command policy should have a nested policy set 105 * for the header, therefore validation should have already been done. 106 */ 107 ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header, 108 NULL, extack); 109 if (ret < 0) 110 return ret; 111 if (tb[ETHTOOL_A_HEADER_FLAGS]) 112 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]); 113 114 devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME]; 115 if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) { 116 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]); 117 118 dev = netdev_get_by_index(net, ifindex, &req_info->dev_tracker, 119 GFP_KERNEL); 120 if (!dev) { 121 NL_SET_ERR_MSG_ATTR(extack, 122 tb[ETHTOOL_A_HEADER_DEV_INDEX], 123 "no device matches ifindex"); 124 return -ENODEV; 125 } 126 /* if both ifindex and ifname are passed, they must match */ 127 if (devname_attr && 128 strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) { 129 netdev_put(dev, &req_info->dev_tracker); 130 NL_SET_ERR_MSG_ATTR(extack, header, 131 "ifindex and name do not match"); 132 return -ENODEV; 133 } 134 } else if (devname_attr) { 135 dev = netdev_get_by_name(net, nla_data(devname_attr), 136 &req_info->dev_tracker, GFP_KERNEL); 137 if (!dev) { 138 NL_SET_ERR_MSG_ATTR(extack, devname_attr, 139 "no device matches name"); 140 return -ENODEV; 141 } 142 } else if (require_dev) { 143 NL_SET_ERR_MSG_ATTR(extack, header, 144 "neither ifindex nor name specified"); 145 return -EINVAL; 146 } 147 148 req_info->dev = dev; 149 req_info->flags = flags; 150 return 0; 151} 152 153/** 154 * ethnl_fill_reply_header() - Put common header into a reply message 155 * @skb: skb with the message 156 * @dev: network device to describe in header 157 * @attrtype: attribute type to use for the nest 158 * 159 * Create a nested attribute with attributes describing given network device. 160 * 161 * Return: 0 on success, error value (-EMSGSIZE only) on error 162 */ 163int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev, 164 u16 attrtype) 165{ 166 struct nlattr *nest; 167 168 if (!dev) 169 return 0; 170 nest = nla_nest_start(skb, attrtype); 171 if (!nest) 172 return -EMSGSIZE; 173 174 if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) || 175 nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name)) 176 goto nla_put_failure; 177 /* If more attributes are put into reply header, ethnl_header_size() 178 * must be updated to account for them. 179 */ 180 181 nla_nest_end(skb, nest); 182 return 0; 183 184nla_put_failure: 185 nla_nest_cancel(skb, nest); 186 return -EMSGSIZE; 187} 188 189/** 190 * ethnl_reply_init() - Create skb for a reply and fill device identification 191 * @payload: payload length (without netlink and genetlink header) 192 * @dev: device the reply is about (may be null) 193 * @cmd: ETHTOOL_MSG_* message type for reply 194 * @hdr_attrtype: attribute type for common header 195 * @info: genetlink info of the received packet we respond to 196 * @ehdrp: place to store payload pointer returned by genlmsg_new() 197 * 198 * Return: pointer to allocated skb on success, NULL on error 199 */ 200struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd, 201 u16 hdr_attrtype, struct genl_info *info, 202 void **ehdrp) 203{ 204 struct sk_buff *skb; 205 206 skb = genlmsg_new(payload, GFP_KERNEL); 207 if (!skb) 208 goto err; 209 *ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd); 210 if (!*ehdrp) 211 goto err_free; 212 213 if (dev) { 214 int ret; 215 216 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype); 217 if (ret < 0) 218 goto err_free; 219 } 220 return skb; 221 222err_free: 223 nlmsg_free(skb); 224err: 225 if (info) 226 GENL_SET_ERR_MSG(info, "failed to setup reply message"); 227 return NULL; 228} 229 230void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd) 231{ 232 return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 233 ðtool_genl_family, 0, cmd); 234} 235 236void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd) 237{ 238 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0, 239 cmd); 240} 241 242int ethnl_multicast(struct sk_buff *skb, struct net_device *dev) 243{ 244 return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb, 245 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL); 246} 247 248/* GET request helpers */ 249 250/** 251 * struct ethnl_dump_ctx - context structure for generic dumpit() callback 252 * @ops: request ops of currently processed message type 253 * @req_info: parsed request header of processed request 254 * @reply_data: data needed to compose the reply 255 * @pos_ifindex: saved iteration position - ifindex 256 * 257 * These parameters are kept in struct netlink_callback as context preserved 258 * between iterations. They are initialized by ethnl_default_start() and used 259 * in ethnl_default_dumpit() and ethnl_default_done(). 260 */ 261struct ethnl_dump_ctx { 262 const struct ethnl_request_ops *ops; 263 struct ethnl_req_info *req_info; 264 struct ethnl_reply_data *reply_data; 265 unsigned long pos_ifindex; 266}; 267 268static const struct ethnl_request_ops * 269ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { 270 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, 271 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, 272 [ETHTOOL_MSG_LINKINFO_SET] = ðnl_linkinfo_request_ops, 273 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops, 274 [ETHTOOL_MSG_LINKMODES_SET] = ðnl_linkmodes_request_ops, 275 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops, 276 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops, 277 [ETHTOOL_MSG_DEBUG_SET] = ðnl_debug_request_ops, 278 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops, 279 [ETHTOOL_MSG_WOL_SET] = ðnl_wol_request_ops, 280 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops, 281 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops, 282 [ETHTOOL_MSG_PRIVFLAGS_SET] = ðnl_privflags_request_ops, 283 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, 284 [ETHTOOL_MSG_RINGS_SET] = ðnl_rings_request_ops, 285 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, 286 [ETHTOOL_MSG_CHANNELS_SET] = ðnl_channels_request_ops, 287 [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops, 288 [ETHTOOL_MSG_COALESCE_SET] = ðnl_coalesce_request_ops, 289 [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, 290 [ETHTOOL_MSG_PAUSE_SET] = ðnl_pause_request_ops, 291 [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops, 292 [ETHTOOL_MSG_EEE_SET] = ðnl_eee_request_ops, 293 [ETHTOOL_MSG_FEC_GET] = ðnl_fec_request_ops, 294 [ETHTOOL_MSG_FEC_SET] = ðnl_fec_request_ops, 295 [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops, 296 [ETHTOOL_MSG_MODULE_EEPROM_GET] = ðnl_module_eeprom_request_ops, 297 [ETHTOOL_MSG_STATS_GET] = ðnl_stats_request_ops, 298 [ETHTOOL_MSG_PHC_VCLOCKS_GET] = ðnl_phc_vclocks_request_ops, 299 [ETHTOOL_MSG_MODULE_GET] = ðnl_module_request_ops, 300 [ETHTOOL_MSG_MODULE_SET] = ðnl_module_request_ops, 301 [ETHTOOL_MSG_PSE_GET] = ðnl_pse_request_ops, 302 [ETHTOOL_MSG_PSE_SET] = ðnl_pse_request_ops, 303 [ETHTOOL_MSG_RSS_GET] = ðnl_rss_request_ops, 304 [ETHTOOL_MSG_PLCA_GET_CFG] = ðnl_plca_cfg_request_ops, 305 [ETHTOOL_MSG_PLCA_SET_CFG] = ðnl_plca_cfg_request_ops, 306 [ETHTOOL_MSG_PLCA_GET_STATUS] = ðnl_plca_status_request_ops, 307 [ETHTOOL_MSG_MM_GET] = ðnl_mm_request_ops, 308 [ETHTOOL_MSG_MM_SET] = ðnl_mm_request_ops, 309}; 310 311static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) 312{ 313 return (struct ethnl_dump_ctx *)cb->ctx; 314} 315 316/** 317 * ethnl_default_parse() - Parse request message 318 * @req_info: pointer to structure to put data into 319 * @info: genl_info from the request 320 * @request_ops: struct request_ops for request type 321 * @require_dev: fail if no device identified in header 322 * 323 * Parse universal request header and call request specific ->parse_request() 324 * callback (if defined) to parse the rest of the message. 325 * 326 * Return: 0 on success or negative error code 327 */ 328static int ethnl_default_parse(struct ethnl_req_info *req_info, 329 const struct genl_info *info, 330 const struct ethnl_request_ops *request_ops, 331 bool require_dev) 332{ 333 struct nlattr **tb = info->attrs; 334 int ret; 335 336 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], 337 genl_info_net(info), info->extack, 338 require_dev); 339 if (ret < 0) 340 return ret; 341 342 if (request_ops->parse_request) { 343 ret = request_ops->parse_request(req_info, tb, info->extack); 344 if (ret < 0) 345 return ret; 346 } 347 348 return 0; 349} 350 351/** 352 * ethnl_init_reply_data() - Initialize reply data for GET request 353 * @reply_data: pointer to embedded struct ethnl_reply_data 354 * @ops: instance of struct ethnl_request_ops describing the layout 355 * @dev: network device to initialize the reply for 356 * 357 * Fills the reply data part with zeros and sets the dev member. Must be called 358 * before calling the ->fill_reply() callback (for each iteration when handling 359 * dump requests). 360 */ 361static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data, 362 const struct ethnl_request_ops *ops, 363 struct net_device *dev) 364{ 365 memset(reply_data, 0, ops->reply_data_size); 366 reply_data->dev = dev; 367} 368 369/* default ->doit() handler for GET type requests */ 370static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) 371{ 372 struct ethnl_reply_data *reply_data = NULL; 373 struct ethnl_req_info *req_info = NULL; 374 const u8 cmd = info->genlhdr->cmd; 375 const struct ethnl_request_ops *ops; 376 int hdr_len, reply_len; 377 struct sk_buff *rskb; 378 void *reply_payload; 379 int ret; 380 381 ops = ethnl_default_requests[cmd]; 382 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 383 return -EOPNOTSUPP; 384 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 385 return -EINVAL; 386 387 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 388 if (!req_info) 389 return -ENOMEM; 390 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 391 if (!reply_data) { 392 kfree(req_info); 393 return -ENOMEM; 394 } 395 396 ret = ethnl_default_parse(req_info, info, ops, !ops->allow_nodev_do); 397 if (ret < 0) 398 goto err_dev; 399 ethnl_init_reply_data(reply_data, ops, req_info->dev); 400 401 rtnl_lock(); 402 ret = ops->prepare_data(req_info, reply_data, info); 403 rtnl_unlock(); 404 if (ret < 0) 405 goto err_cleanup; 406 ret = ops->reply_size(req_info, reply_data); 407 if (ret < 0) 408 goto err_cleanup; 409 reply_len = ret; 410 ret = -ENOMEM; 411 rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(), 412 req_info->dev, ops->reply_cmd, 413 ops->hdr_attr, info, &reply_payload); 414 if (!rskb) 415 goto err_cleanup; 416 hdr_len = rskb->len; 417 ret = ops->fill_reply(rskb, req_info, reply_data); 418 if (ret < 0) 419 goto err_msg; 420 WARN_ONCE(rskb->len - hdr_len > reply_len, 421 "ethnl cmd %d: calculated reply length %d, but consumed %d\n", 422 cmd, reply_len, rskb->len - hdr_len); 423 if (ops->cleanup_data) 424 ops->cleanup_data(reply_data); 425 426 genlmsg_end(rskb, reply_payload); 427 netdev_put(req_info->dev, &req_info->dev_tracker); 428 kfree(reply_data); 429 kfree(req_info); 430 return genlmsg_reply(rskb, info); 431 432err_msg: 433 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 434 nlmsg_free(rskb); 435err_cleanup: 436 if (ops->cleanup_data) 437 ops->cleanup_data(reply_data); 438err_dev: 439 netdev_put(req_info->dev, &req_info->dev_tracker); 440 kfree(reply_data); 441 kfree(req_info); 442 return ret; 443} 444 445static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, 446 const struct ethnl_dump_ctx *ctx, 447 const struct genl_info *info) 448{ 449 void *ehdr; 450 int ret; 451 452 ehdr = genlmsg_put(skb, info->snd_portid, info->snd_seq, 453 ðtool_genl_family, NLM_F_MULTI, 454 ctx->ops->reply_cmd); 455 if (!ehdr) 456 return -EMSGSIZE; 457 458 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); 459 rtnl_lock(); 460 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, info); 461 rtnl_unlock(); 462 if (ret < 0) 463 goto out; 464 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); 465 if (ret < 0) 466 goto out; 467 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); 468 469out: 470 if (ctx->ops->cleanup_data) 471 ctx->ops->cleanup_data(ctx->reply_data); 472 ctx->reply_data->dev = NULL; 473 if (ret < 0) 474 genlmsg_cancel(skb, ehdr); 475 else 476 genlmsg_end(skb, ehdr); 477 return ret; 478} 479 480/* Default ->dumpit() handler for GET requests. Device iteration copied from 481 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable 482 * persistence as we cannot guarantee to hold RTNL lock through the whole 483 * function as rtnetnlink does. 484 */ 485static int ethnl_default_dumpit(struct sk_buff *skb, 486 struct netlink_callback *cb) 487{ 488 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 489 struct net *net = sock_net(skb->sk); 490 struct net_device *dev; 491 int ret = 0; 492 493 rtnl_lock(); 494 for_each_netdev_dump(net, dev, ctx->pos_ifindex) { 495 dev_hold(dev); 496 rtnl_unlock(); 497 498 ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb)); 499 500 rtnl_lock(); 501 dev_put(dev); 502 503 if (ret < 0 && ret != -EOPNOTSUPP) { 504 if (likely(skb->len)) 505 ret = skb->len; 506 break; 507 } 508 ret = 0; 509 } 510 rtnl_unlock(); 511 512 return ret; 513} 514 515/* generic ->start() handler for GET requests */ 516static int ethnl_default_start(struct netlink_callback *cb) 517{ 518 const struct genl_dumpit_info *info = genl_dumpit_info(cb); 519 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 520 struct ethnl_reply_data *reply_data; 521 const struct ethnl_request_ops *ops; 522 struct ethnl_req_info *req_info; 523 struct genlmsghdr *ghdr; 524 int ret; 525 526 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 527 528 ghdr = nlmsg_data(cb->nlh); 529 ops = ethnl_default_requests[ghdr->cmd]; 530 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 531 return -EOPNOTSUPP; 532 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 533 if (!req_info) 534 return -ENOMEM; 535 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 536 if (!reply_data) { 537 ret = -ENOMEM; 538 goto free_req_info; 539 } 540 541 ret = ethnl_default_parse(req_info, &info->info, ops, false); 542 if (req_info->dev) { 543 /* We ignore device specification in dump requests but as the 544 * same parser as for non-dump (doit) requests is used, it 545 * would take reference to the device if it finds one 546 */ 547 netdev_put(req_info->dev, &req_info->dev_tracker); 548 req_info->dev = NULL; 549 } 550 if (ret < 0) 551 goto free_reply_data; 552 553 ctx->ops = ops; 554 ctx->req_info = req_info; 555 ctx->reply_data = reply_data; 556 ctx->pos_ifindex = 0; 557 558 return 0; 559 560free_reply_data: 561 kfree(reply_data); 562free_req_info: 563 kfree(req_info); 564 565 return ret; 566} 567 568/* default ->done() handler for GET requests */ 569static int ethnl_default_done(struct netlink_callback *cb) 570{ 571 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 572 573 kfree(ctx->reply_data); 574 kfree(ctx->req_info); 575 576 return 0; 577} 578 579static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) 580{ 581 const struct ethnl_request_ops *ops; 582 struct ethnl_req_info req_info = {}; 583 const u8 cmd = info->genlhdr->cmd; 584 int ret; 585 586 ops = ethnl_default_requests[cmd]; 587 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 588 return -EOPNOTSUPP; 589 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 590 return -EINVAL; 591 592 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr], 593 genl_info_net(info), info->extack, 594 true); 595 if (ret < 0) 596 return ret; 597 598 if (ops->set_validate) { 599 ret = ops->set_validate(&req_info, info); 600 /* 0 means nothing to do */ 601 if (ret <= 0) 602 goto out_dev; 603 } 604 605 rtnl_lock(); 606 ret = ethnl_ops_begin(req_info.dev); 607 if (ret < 0) 608 goto out_rtnl; 609 610 ret = ops->set(&req_info, info); 611 if (ret <= 0) 612 goto out_ops; 613 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL); 614 615 ret = 0; 616out_ops: 617 ethnl_ops_complete(req_info.dev); 618out_rtnl: 619 rtnl_unlock(); 620out_dev: 621 ethnl_parse_header_dev_put(&req_info); 622 return ret; 623} 624 625static const struct ethnl_request_ops * 626ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 627 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 628 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 629 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 630 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 631 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 632 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 633 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 634 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 635 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 636 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 637 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 638 [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops, 639 [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, 640 [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, 641 [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, 642}; 643 644/* default notification handler */ 645static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 646 const void *data) 647{ 648 struct ethnl_reply_data *reply_data; 649 const struct ethnl_request_ops *ops; 650 struct ethnl_req_info *req_info; 651 struct genl_info info; 652 struct sk_buff *skb; 653 void *reply_payload; 654 int reply_len; 655 int ret; 656 657 genl_info_init_ntf(&info, ðtool_genl_family, cmd); 658 659 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 660 !ethnl_default_notify_ops[cmd], 661 "unexpected notification type %u\n", cmd)) 662 return; 663 ops = ethnl_default_notify_ops[cmd]; 664 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 665 if (!req_info) 666 return; 667 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 668 if (!reply_data) { 669 kfree(req_info); 670 return; 671 } 672 673 req_info->dev = dev; 674 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 675 676 ethnl_init_reply_data(reply_data, ops, dev); 677 ret = ops->prepare_data(req_info, reply_data, &info); 678 if (ret < 0) 679 goto err_cleanup; 680 ret = ops->reply_size(req_info, reply_data); 681 if (ret < 0) 682 goto err_cleanup; 683 reply_len = ret + ethnl_reply_header_size(); 684 skb = genlmsg_new(reply_len, GFP_KERNEL); 685 if (!skb) 686 goto err_cleanup; 687 reply_payload = ethnl_bcastmsg_put(skb, cmd); 688 if (!reply_payload) 689 goto err_skb; 690 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 691 if (ret < 0) 692 goto err_msg; 693 ret = ops->fill_reply(skb, req_info, reply_data); 694 if (ret < 0) 695 goto err_msg; 696 if (ops->cleanup_data) 697 ops->cleanup_data(reply_data); 698 699 genlmsg_end(skb, reply_payload); 700 kfree(reply_data); 701 kfree(req_info); 702 ethnl_multicast(skb, dev); 703 return; 704 705err_msg: 706 WARN_ONCE(ret == -EMSGSIZE, 707 "calculated message payload length (%d) not sufficient\n", 708 reply_len); 709err_skb: 710 nlmsg_free(skb); 711err_cleanup: 712 if (ops->cleanup_data) 713 ops->cleanup_data(reply_data); 714 kfree(reply_data); 715 kfree(req_info); 716 return; 717} 718 719/* notifications */ 720 721typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 722 const void *data); 723 724static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 725 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 726 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 727 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 728 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 729 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 730 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 731 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 732 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 733 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 734 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 735 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 736 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify, 737 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, 738 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, 739 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, 740}; 741 742void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 743{ 744 if (unlikely(!ethnl_ok)) 745 return; 746 ASSERT_RTNL(); 747 748 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 749 ethnl_notify_handlers[cmd])) 750 ethnl_notify_handlers[cmd](dev, cmd, data); 751 else 752 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 753 cmd, netdev_name(dev)); 754} 755EXPORT_SYMBOL(ethtool_notify); 756 757static void ethnl_notify_features(struct netdev_notifier_info *info) 758{ 759 struct net_device *dev = netdev_notifier_info_to_dev(info); 760 761 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 762} 763 764static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 765 void *ptr) 766{ 767 switch (event) { 768 case NETDEV_FEAT_CHANGE: 769 ethnl_notify_features(ptr); 770 break; 771 } 772 773 return NOTIFY_DONE; 774} 775 776static struct notifier_block ethnl_netdev_notifier = { 777 .notifier_call = ethnl_netdev_event, 778}; 779 780/* genetlink setup */ 781 782static const struct genl_ops ethtool_genl_ops[] = { 783 { 784 .cmd = ETHTOOL_MSG_STRSET_GET, 785 .doit = ethnl_default_doit, 786 .start = ethnl_default_start, 787 .dumpit = ethnl_default_dumpit, 788 .done = ethnl_default_done, 789 .policy = ethnl_strset_get_policy, 790 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1, 791 }, 792 { 793 .cmd = ETHTOOL_MSG_LINKINFO_GET, 794 .doit = ethnl_default_doit, 795 .start = ethnl_default_start, 796 .dumpit = ethnl_default_dumpit, 797 .done = ethnl_default_done, 798 .policy = ethnl_linkinfo_get_policy, 799 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1, 800 }, 801 { 802 .cmd = ETHTOOL_MSG_LINKINFO_SET, 803 .flags = GENL_UNS_ADMIN_PERM, 804 .doit = ethnl_default_set_doit, 805 .policy = ethnl_linkinfo_set_policy, 806 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1, 807 }, 808 { 809 .cmd = ETHTOOL_MSG_LINKMODES_GET, 810 .doit = ethnl_default_doit, 811 .start = ethnl_default_start, 812 .dumpit = ethnl_default_dumpit, 813 .done = ethnl_default_done, 814 .policy = ethnl_linkmodes_get_policy, 815 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1, 816 }, 817 { 818 .cmd = ETHTOOL_MSG_LINKMODES_SET, 819 .flags = GENL_UNS_ADMIN_PERM, 820 .doit = ethnl_default_set_doit, 821 .policy = ethnl_linkmodes_set_policy, 822 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1, 823 }, 824 { 825 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 826 .doit = ethnl_default_doit, 827 .start = ethnl_default_start, 828 .dumpit = ethnl_default_dumpit, 829 .done = ethnl_default_done, 830 .policy = ethnl_linkstate_get_policy, 831 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1, 832 }, 833 { 834 .cmd = ETHTOOL_MSG_DEBUG_GET, 835 .doit = ethnl_default_doit, 836 .start = ethnl_default_start, 837 .dumpit = ethnl_default_dumpit, 838 .done = ethnl_default_done, 839 .policy = ethnl_debug_get_policy, 840 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1, 841 }, 842 { 843 .cmd = ETHTOOL_MSG_DEBUG_SET, 844 .flags = GENL_UNS_ADMIN_PERM, 845 .doit = ethnl_default_set_doit, 846 .policy = ethnl_debug_set_policy, 847 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1, 848 }, 849 { 850 .cmd = ETHTOOL_MSG_WOL_GET, 851 .flags = GENL_UNS_ADMIN_PERM, 852 .doit = ethnl_default_doit, 853 .start = ethnl_default_start, 854 .dumpit = ethnl_default_dumpit, 855 .done = ethnl_default_done, 856 .policy = ethnl_wol_get_policy, 857 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1, 858 }, 859 { 860 .cmd = ETHTOOL_MSG_WOL_SET, 861 .flags = GENL_UNS_ADMIN_PERM, 862 .doit = ethnl_default_set_doit, 863 .policy = ethnl_wol_set_policy, 864 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1, 865 }, 866 { 867 .cmd = ETHTOOL_MSG_FEATURES_GET, 868 .doit = ethnl_default_doit, 869 .start = ethnl_default_start, 870 .dumpit = ethnl_default_dumpit, 871 .done = ethnl_default_done, 872 .policy = ethnl_features_get_policy, 873 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1, 874 }, 875 { 876 .cmd = ETHTOOL_MSG_FEATURES_SET, 877 .flags = GENL_UNS_ADMIN_PERM, 878 .doit = ethnl_set_features, 879 .policy = ethnl_features_set_policy, 880 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1, 881 }, 882 { 883 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 884 .doit = ethnl_default_doit, 885 .start = ethnl_default_start, 886 .dumpit = ethnl_default_dumpit, 887 .done = ethnl_default_done, 888 .policy = ethnl_privflags_get_policy, 889 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1, 890 }, 891 { 892 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 893 .flags = GENL_UNS_ADMIN_PERM, 894 .doit = ethnl_default_set_doit, 895 .policy = ethnl_privflags_set_policy, 896 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1, 897 }, 898 { 899 .cmd = ETHTOOL_MSG_RINGS_GET, 900 .doit = ethnl_default_doit, 901 .start = ethnl_default_start, 902 .dumpit = ethnl_default_dumpit, 903 .done = ethnl_default_done, 904 .policy = ethnl_rings_get_policy, 905 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1, 906 }, 907 { 908 .cmd = ETHTOOL_MSG_RINGS_SET, 909 .flags = GENL_UNS_ADMIN_PERM, 910 .doit = ethnl_default_set_doit, 911 .policy = ethnl_rings_set_policy, 912 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1, 913 }, 914 { 915 .cmd = ETHTOOL_MSG_CHANNELS_GET, 916 .doit = ethnl_default_doit, 917 .start = ethnl_default_start, 918 .dumpit = ethnl_default_dumpit, 919 .done = ethnl_default_done, 920 .policy = ethnl_channels_get_policy, 921 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1, 922 }, 923 { 924 .cmd = ETHTOOL_MSG_CHANNELS_SET, 925 .flags = GENL_UNS_ADMIN_PERM, 926 .doit = ethnl_default_set_doit, 927 .policy = ethnl_channels_set_policy, 928 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1, 929 }, 930 { 931 .cmd = ETHTOOL_MSG_COALESCE_GET, 932 .doit = ethnl_default_doit, 933 .start = ethnl_default_start, 934 .dumpit = ethnl_default_dumpit, 935 .done = ethnl_default_done, 936 .policy = ethnl_coalesce_get_policy, 937 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1, 938 }, 939 { 940 .cmd = ETHTOOL_MSG_COALESCE_SET, 941 .flags = GENL_UNS_ADMIN_PERM, 942 .doit = ethnl_default_set_doit, 943 .policy = ethnl_coalesce_set_policy, 944 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1, 945 }, 946 { 947 .cmd = ETHTOOL_MSG_PAUSE_GET, 948 .doit = ethnl_default_doit, 949 .start = ethnl_default_start, 950 .dumpit = ethnl_default_dumpit, 951 .done = ethnl_default_done, 952 .policy = ethnl_pause_get_policy, 953 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1, 954 }, 955 { 956 .cmd = ETHTOOL_MSG_PAUSE_SET, 957 .flags = GENL_UNS_ADMIN_PERM, 958 .doit = ethnl_default_set_doit, 959 .policy = ethnl_pause_set_policy, 960 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1, 961 }, 962 { 963 .cmd = ETHTOOL_MSG_EEE_GET, 964 .doit = ethnl_default_doit, 965 .start = ethnl_default_start, 966 .dumpit = ethnl_default_dumpit, 967 .done = ethnl_default_done, 968 .policy = ethnl_eee_get_policy, 969 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1, 970 }, 971 { 972 .cmd = ETHTOOL_MSG_EEE_SET, 973 .flags = GENL_UNS_ADMIN_PERM, 974 .doit = ethnl_default_set_doit, 975 .policy = ethnl_eee_set_policy, 976 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1, 977 }, 978 { 979 .cmd = ETHTOOL_MSG_TSINFO_GET, 980 .doit = ethnl_default_doit, 981 .start = ethnl_default_start, 982 .dumpit = ethnl_default_dumpit, 983 .done = ethnl_default_done, 984 .policy = ethnl_tsinfo_get_policy, 985 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, 986 }, 987 { 988 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, 989 .flags = GENL_UNS_ADMIN_PERM, 990 .doit = ethnl_act_cable_test, 991 .policy = ethnl_cable_test_act_policy, 992 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1, 993 }, 994 { 995 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, 996 .flags = GENL_UNS_ADMIN_PERM, 997 .doit = ethnl_act_cable_test_tdr, 998 .policy = ethnl_cable_test_tdr_act_policy, 999 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1, 1000 }, 1001 { 1002 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, 1003 .doit = ethnl_tunnel_info_doit, 1004 .start = ethnl_tunnel_info_start, 1005 .dumpit = ethnl_tunnel_info_dumpit, 1006 .policy = ethnl_tunnel_info_get_policy, 1007 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, 1008 }, 1009 { 1010 .cmd = ETHTOOL_MSG_FEC_GET, 1011 .doit = ethnl_default_doit, 1012 .start = ethnl_default_start, 1013 .dumpit = ethnl_default_dumpit, 1014 .done = ethnl_default_done, 1015 .policy = ethnl_fec_get_policy, 1016 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1, 1017 }, 1018 { 1019 .cmd = ETHTOOL_MSG_FEC_SET, 1020 .flags = GENL_UNS_ADMIN_PERM, 1021 .doit = ethnl_default_set_doit, 1022 .policy = ethnl_fec_set_policy, 1023 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1, 1024 }, 1025 { 1026 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET, 1027 .flags = GENL_UNS_ADMIN_PERM, 1028 .doit = ethnl_default_doit, 1029 .start = ethnl_default_start, 1030 .dumpit = ethnl_default_dumpit, 1031 .done = ethnl_default_done, 1032 .policy = ethnl_module_eeprom_get_policy, 1033 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1, 1034 }, 1035 { 1036 .cmd = ETHTOOL_MSG_STATS_GET, 1037 .doit = ethnl_default_doit, 1038 .start = ethnl_default_start, 1039 .dumpit = ethnl_default_dumpit, 1040 .done = ethnl_default_done, 1041 .policy = ethnl_stats_get_policy, 1042 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1, 1043 }, 1044 { 1045 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET, 1046 .doit = ethnl_default_doit, 1047 .start = ethnl_default_start, 1048 .dumpit = ethnl_default_dumpit, 1049 .done = ethnl_default_done, 1050 .policy = ethnl_phc_vclocks_get_policy, 1051 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1, 1052 }, 1053 { 1054 .cmd = ETHTOOL_MSG_MODULE_GET, 1055 .doit = ethnl_default_doit, 1056 .start = ethnl_default_start, 1057 .dumpit = ethnl_default_dumpit, 1058 .done = ethnl_default_done, 1059 .policy = ethnl_module_get_policy, 1060 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1, 1061 }, 1062 { 1063 .cmd = ETHTOOL_MSG_MODULE_SET, 1064 .flags = GENL_UNS_ADMIN_PERM, 1065 .doit = ethnl_default_set_doit, 1066 .policy = ethnl_module_set_policy, 1067 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, 1068 }, 1069 { 1070 .cmd = ETHTOOL_MSG_PSE_GET, 1071 .doit = ethnl_default_doit, 1072 .start = ethnl_default_start, 1073 .dumpit = ethnl_default_dumpit, 1074 .done = ethnl_default_done, 1075 .policy = ethnl_pse_get_policy, 1076 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, 1077 }, 1078 { 1079 .cmd = ETHTOOL_MSG_PSE_SET, 1080 .flags = GENL_UNS_ADMIN_PERM, 1081 .doit = ethnl_default_set_doit, 1082 .policy = ethnl_pse_set_policy, 1083 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1, 1084 }, 1085 { 1086 .cmd = ETHTOOL_MSG_RSS_GET, 1087 .doit = ethnl_default_doit, 1088 .policy = ethnl_rss_get_policy, 1089 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1, 1090 }, 1091 { 1092 .cmd = ETHTOOL_MSG_PLCA_GET_CFG, 1093 .doit = ethnl_default_doit, 1094 .start = ethnl_default_start, 1095 .dumpit = ethnl_default_dumpit, 1096 .done = ethnl_default_done, 1097 .policy = ethnl_plca_get_cfg_policy, 1098 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1, 1099 }, 1100 { 1101 .cmd = ETHTOOL_MSG_PLCA_SET_CFG, 1102 .flags = GENL_UNS_ADMIN_PERM, 1103 .doit = ethnl_default_set_doit, 1104 .policy = ethnl_plca_set_cfg_policy, 1105 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1, 1106 }, 1107 { 1108 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS, 1109 .doit = ethnl_default_doit, 1110 .start = ethnl_default_start, 1111 .dumpit = ethnl_default_dumpit, 1112 .done = ethnl_default_done, 1113 .policy = ethnl_plca_get_status_policy, 1114 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1, 1115 }, 1116 { 1117 .cmd = ETHTOOL_MSG_MM_GET, 1118 .doit = ethnl_default_doit, 1119 .start = ethnl_default_start, 1120 .dumpit = ethnl_default_dumpit, 1121 .done = ethnl_default_done, 1122 .policy = ethnl_mm_get_policy, 1123 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1, 1124 }, 1125 { 1126 .cmd = ETHTOOL_MSG_MM_SET, 1127 .flags = GENL_UNS_ADMIN_PERM, 1128 .doit = ethnl_default_set_doit, 1129 .policy = ethnl_mm_set_policy, 1130 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, 1131 }, 1132}; 1133 1134static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 1135 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 1136}; 1137 1138static struct genl_family ethtool_genl_family __ro_after_init = { 1139 .name = ETHTOOL_GENL_NAME, 1140 .version = ETHTOOL_GENL_VERSION, 1141 .netnsok = true, 1142 .parallel_ops = true, 1143 .ops = ethtool_genl_ops, 1144 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 1145 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1, 1146 .mcgrps = ethtool_nl_mcgrps, 1147 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 1148}; 1149 1150/* module setup */ 1151 1152static int __init ethnl_init(void) 1153{ 1154 int ret; 1155 1156 ret = genl_register_family(ðtool_genl_family); 1157 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 1158 return ret; 1159 ethnl_ok = true; 1160 1161 ret = register_netdevice_notifier(ðnl_netdev_notifier); 1162 WARN(ret < 0, "ethtool: net device notifier registration failed"); 1163 return ret; 1164} 1165 1166subsys_initcall(ethnl_init); 1167