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 8 static struct genl_family ethtool_genl_family; 9 10 static bool ethnl_ok __read_mostly; 11 static 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 17 const 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 25 const 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 33 int 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; 56 err: 57 if (dev->dev.parent) 58 pm_runtime_put(dev->dev.parent); 59 60 return ret; 61 } 62 63 void 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 */ 88 int 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 */ 163 int 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; 183 184 nla_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 */ 200 struct 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; 221 222 err_free: 223 nlmsg_free(skb); 224 err: 225 if (info) 226 GENL_SET_ERR_MSG(info, "failed to setup reply message"); 227 return NULL; 228 } 229 230 void *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 } 235 236 void *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 } 241 242 int 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 */ 261 struct 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 }; 267 268 static const struct ethnl_request_ops * 269 ethnl_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 }; 310 311 static 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 */ 328 static 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 */ 361 static 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 */ 370 static 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); 431 432 err_msg: 433 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 434 nlmsg_free(rskb); 435 err_cleanup: 436 if (ops->cleanup_data) 437 ops->cleanup_data(reply_data); 438 err_dev: 439 netdev_put(req_info->dev, &req_info->dev_tracker); 440 kfree(reply_data); 441 kfree(req_info); 442 return ret; 443 } 444 445 static 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); 468 469 out: 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. */ 481 static int ethnl_default_dumpit(struct sk_buff *skb, 482 struct netlink_callback *cb) 483 { 484 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 485 struct net *net = sock_net(skb->sk); 486 struct net_device *dev; 487 int ret = 0; 488 489 rcu_read_lock(); 490 for_each_netdev_dump(net, dev, ctx->pos_ifindex) { 491 dev_hold(dev); 492 rcu_read_unlock(); 493 494 ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb)); 495 496 rcu_read_lock(); 497 dev_put(dev); 498 499 if (ret < 0 && ret != -EOPNOTSUPP) { 500 if (likely(skb->len)) 501 ret = skb->len; 502 break; 503 } 504 ret = 0; 505 } 506 rcu_read_unlock(); 507 508 return ret; 509 } 510 511 /* generic ->start() handler for GET requests */ 512 static int ethnl_default_start(struct netlink_callback *cb) 513 { 514 const struct genl_dumpit_info *info = genl_dumpit_info(cb); 515 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 516 struct ethnl_reply_data *reply_data; 517 const struct ethnl_request_ops *ops; 518 struct ethnl_req_info *req_info; 519 struct genlmsghdr *ghdr; 520 int ret; 521 522 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 523 524 ghdr = nlmsg_data(cb->nlh); 525 ops = ethnl_default_requests[ghdr->cmd]; 526 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 527 return -EOPNOTSUPP; 528 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 529 if (!req_info) 530 return -ENOMEM; 531 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 532 if (!reply_data) { 533 ret = -ENOMEM; 534 goto free_req_info; 535 } 536 537 ret = ethnl_default_parse(req_info, &info->info, ops, false); 538 if (req_info->dev) { 539 /* We ignore device specification in dump requests but as the 540 * same parser as for non-dump (doit) requests is used, it 541 * would take reference to the device if it finds one 542 */ 543 netdev_put(req_info->dev, &req_info->dev_tracker); 544 req_info->dev = NULL; 545 } 546 if (ret < 0) 547 goto free_reply_data; 548 549 ctx->ops = ops; 550 ctx->req_info = req_info; 551 ctx->reply_data = reply_data; 552 ctx->pos_ifindex = 0; 553 554 return 0; 555 556 free_reply_data: 557 kfree(reply_data); 558 free_req_info: 559 kfree(req_info); 560 561 return ret; 562 } 563 564 /* default ->done() handler for GET requests */ 565 static int ethnl_default_done(struct netlink_callback *cb) 566 { 567 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 568 569 kfree(ctx->reply_data); 570 kfree(ctx->req_info); 571 572 return 0; 573 } 574 575 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) 576 { 577 const struct ethnl_request_ops *ops; 578 struct ethnl_req_info req_info = {}; 579 const u8 cmd = info->genlhdr->cmd; 580 int ret; 581 582 ops = ethnl_default_requests[cmd]; 583 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 584 return -EOPNOTSUPP; 585 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 586 return -EINVAL; 587 588 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr], 589 genl_info_net(info), info->extack, 590 true); 591 if (ret < 0) 592 return ret; 593 594 if (ops->set_validate) { 595 ret = ops->set_validate(&req_info, info); 596 /* 0 means nothing to do */ 597 if (ret <= 0) 598 goto out_dev; 599 } 600 601 rtnl_lock(); 602 ret = ethnl_ops_begin(req_info.dev); 603 if (ret < 0) 604 goto out_rtnl; 605 606 ret = ops->set(&req_info, info); 607 if (ret <= 0) 608 goto out_ops; 609 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL); 610 611 ret = 0; 612 out_ops: 613 ethnl_ops_complete(req_info.dev); 614 out_rtnl: 615 rtnl_unlock(); 616 out_dev: 617 ethnl_parse_header_dev_put(&req_info); 618 return ret; 619 } 620 621 static const struct ethnl_request_ops * 622 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 623 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 624 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 625 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 626 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 627 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 628 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 629 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 630 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 631 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 632 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 633 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 634 [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops, 635 [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, 636 [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, 637 [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, 638 }; 639 640 /* default notification handler */ 641 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 642 const void *data) 643 { 644 struct ethnl_reply_data *reply_data; 645 const struct ethnl_request_ops *ops; 646 struct ethnl_req_info *req_info; 647 struct genl_info info; 648 struct sk_buff *skb; 649 void *reply_payload; 650 int reply_len; 651 int ret; 652 653 genl_info_init_ntf(&info, ðtool_genl_family, cmd); 654 655 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 656 !ethnl_default_notify_ops[cmd], 657 "unexpected notification type %u\n", cmd)) 658 return; 659 ops = ethnl_default_notify_ops[cmd]; 660 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 661 if (!req_info) 662 return; 663 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 664 if (!reply_data) { 665 kfree(req_info); 666 return; 667 } 668 669 req_info->dev = dev; 670 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 671 672 ethnl_init_reply_data(reply_data, ops, dev); 673 ret = ops->prepare_data(req_info, reply_data, &info); 674 if (ret < 0) 675 goto err_cleanup; 676 ret = ops->reply_size(req_info, reply_data); 677 if (ret < 0) 678 goto err_cleanup; 679 reply_len = ret + ethnl_reply_header_size(); 680 skb = genlmsg_new(reply_len, GFP_KERNEL); 681 if (!skb) 682 goto err_cleanup; 683 reply_payload = ethnl_bcastmsg_put(skb, cmd); 684 if (!reply_payload) 685 goto err_skb; 686 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 687 if (ret < 0) 688 goto err_msg; 689 ret = ops->fill_reply(skb, req_info, reply_data); 690 if (ret < 0) 691 goto err_msg; 692 if (ops->cleanup_data) 693 ops->cleanup_data(reply_data); 694 695 genlmsg_end(skb, reply_payload); 696 kfree(reply_data); 697 kfree(req_info); 698 ethnl_multicast(skb, dev); 699 return; 700 701 err_msg: 702 WARN_ONCE(ret == -EMSGSIZE, 703 "calculated message payload length (%d) not sufficient\n", 704 reply_len); 705 err_skb: 706 nlmsg_free(skb); 707 err_cleanup: 708 if (ops->cleanup_data) 709 ops->cleanup_data(reply_data); 710 kfree(reply_data); 711 kfree(req_info); 712 return; 713 } 714 715 /* notifications */ 716 717 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 718 const void *data); 719 720 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 721 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 722 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 723 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 724 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 725 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 726 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 727 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 728 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 729 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 730 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 731 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 732 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify, 733 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, 734 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, 735 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, 736 }; 737 738 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 739 { 740 if (unlikely(!ethnl_ok)) 741 return; 742 ASSERT_RTNL(); 743 744 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 745 ethnl_notify_handlers[cmd])) 746 ethnl_notify_handlers[cmd](dev, cmd, data); 747 else 748 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 749 cmd, netdev_name(dev)); 750 } 751 EXPORT_SYMBOL(ethtool_notify); 752 753 static void ethnl_notify_features(struct netdev_notifier_info *info) 754 { 755 struct net_device *dev = netdev_notifier_info_to_dev(info); 756 757 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 758 } 759 760 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 761 void *ptr) 762 { 763 switch (event) { 764 case NETDEV_FEAT_CHANGE: 765 ethnl_notify_features(ptr); 766 break; 767 } 768 769 return NOTIFY_DONE; 770 } 771 772 static struct notifier_block ethnl_netdev_notifier = { 773 .notifier_call = ethnl_netdev_event, 774 }; 775 776 /* genetlink setup */ 777 778 static const struct genl_ops ethtool_genl_ops[] = { 779 { 780 .cmd = ETHTOOL_MSG_STRSET_GET, 781 .doit = ethnl_default_doit, 782 .start = ethnl_default_start, 783 .dumpit = ethnl_default_dumpit, 784 .done = ethnl_default_done, 785 .policy = ethnl_strset_get_policy, 786 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1, 787 }, 788 { 789 .cmd = ETHTOOL_MSG_LINKINFO_GET, 790 .doit = ethnl_default_doit, 791 .start = ethnl_default_start, 792 .dumpit = ethnl_default_dumpit, 793 .done = ethnl_default_done, 794 .policy = ethnl_linkinfo_get_policy, 795 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1, 796 }, 797 { 798 .cmd = ETHTOOL_MSG_LINKINFO_SET, 799 .flags = GENL_UNS_ADMIN_PERM, 800 .doit = ethnl_default_set_doit, 801 .policy = ethnl_linkinfo_set_policy, 802 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1, 803 }, 804 { 805 .cmd = ETHTOOL_MSG_LINKMODES_GET, 806 .doit = ethnl_default_doit, 807 .start = ethnl_default_start, 808 .dumpit = ethnl_default_dumpit, 809 .done = ethnl_default_done, 810 .policy = ethnl_linkmodes_get_policy, 811 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1, 812 }, 813 { 814 .cmd = ETHTOOL_MSG_LINKMODES_SET, 815 .flags = GENL_UNS_ADMIN_PERM, 816 .doit = ethnl_default_set_doit, 817 .policy = ethnl_linkmodes_set_policy, 818 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1, 819 }, 820 { 821 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 822 .doit = ethnl_default_doit, 823 .start = ethnl_default_start, 824 .dumpit = ethnl_default_dumpit, 825 .done = ethnl_default_done, 826 .policy = ethnl_linkstate_get_policy, 827 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1, 828 }, 829 { 830 .cmd = ETHTOOL_MSG_DEBUG_GET, 831 .doit = ethnl_default_doit, 832 .start = ethnl_default_start, 833 .dumpit = ethnl_default_dumpit, 834 .done = ethnl_default_done, 835 .policy = ethnl_debug_get_policy, 836 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1, 837 }, 838 { 839 .cmd = ETHTOOL_MSG_DEBUG_SET, 840 .flags = GENL_UNS_ADMIN_PERM, 841 .doit = ethnl_default_set_doit, 842 .policy = ethnl_debug_set_policy, 843 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1, 844 }, 845 { 846 .cmd = ETHTOOL_MSG_WOL_GET, 847 .flags = GENL_UNS_ADMIN_PERM, 848 .doit = ethnl_default_doit, 849 .start = ethnl_default_start, 850 .dumpit = ethnl_default_dumpit, 851 .done = ethnl_default_done, 852 .policy = ethnl_wol_get_policy, 853 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1, 854 }, 855 { 856 .cmd = ETHTOOL_MSG_WOL_SET, 857 .flags = GENL_UNS_ADMIN_PERM, 858 .doit = ethnl_default_set_doit, 859 .policy = ethnl_wol_set_policy, 860 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1, 861 }, 862 { 863 .cmd = ETHTOOL_MSG_FEATURES_GET, 864 .doit = ethnl_default_doit, 865 .start = ethnl_default_start, 866 .dumpit = ethnl_default_dumpit, 867 .done = ethnl_default_done, 868 .policy = ethnl_features_get_policy, 869 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1, 870 }, 871 { 872 .cmd = ETHTOOL_MSG_FEATURES_SET, 873 .flags = GENL_UNS_ADMIN_PERM, 874 .doit = ethnl_set_features, 875 .policy = ethnl_features_set_policy, 876 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1, 877 }, 878 { 879 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 880 .doit = ethnl_default_doit, 881 .start = ethnl_default_start, 882 .dumpit = ethnl_default_dumpit, 883 .done = ethnl_default_done, 884 .policy = ethnl_privflags_get_policy, 885 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1, 886 }, 887 { 888 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 889 .flags = GENL_UNS_ADMIN_PERM, 890 .doit = ethnl_default_set_doit, 891 .policy = ethnl_privflags_set_policy, 892 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1, 893 }, 894 { 895 .cmd = ETHTOOL_MSG_RINGS_GET, 896 .doit = ethnl_default_doit, 897 .start = ethnl_default_start, 898 .dumpit = ethnl_default_dumpit, 899 .done = ethnl_default_done, 900 .policy = ethnl_rings_get_policy, 901 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1, 902 }, 903 { 904 .cmd = ETHTOOL_MSG_RINGS_SET, 905 .flags = GENL_UNS_ADMIN_PERM, 906 .doit = ethnl_default_set_doit, 907 .policy = ethnl_rings_set_policy, 908 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1, 909 }, 910 { 911 .cmd = ETHTOOL_MSG_CHANNELS_GET, 912 .doit = ethnl_default_doit, 913 .start = ethnl_default_start, 914 .dumpit = ethnl_default_dumpit, 915 .done = ethnl_default_done, 916 .policy = ethnl_channels_get_policy, 917 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1, 918 }, 919 { 920 .cmd = ETHTOOL_MSG_CHANNELS_SET, 921 .flags = GENL_UNS_ADMIN_PERM, 922 .doit = ethnl_default_set_doit, 923 .policy = ethnl_channels_set_policy, 924 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1, 925 }, 926 { 927 .cmd = ETHTOOL_MSG_COALESCE_GET, 928 .doit = ethnl_default_doit, 929 .start = ethnl_default_start, 930 .dumpit = ethnl_default_dumpit, 931 .done = ethnl_default_done, 932 .policy = ethnl_coalesce_get_policy, 933 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1, 934 }, 935 { 936 .cmd = ETHTOOL_MSG_COALESCE_SET, 937 .flags = GENL_UNS_ADMIN_PERM, 938 .doit = ethnl_default_set_doit, 939 .policy = ethnl_coalesce_set_policy, 940 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1, 941 }, 942 { 943 .cmd = ETHTOOL_MSG_PAUSE_GET, 944 .doit = ethnl_default_doit, 945 .start = ethnl_default_start, 946 .dumpit = ethnl_default_dumpit, 947 .done = ethnl_default_done, 948 .policy = ethnl_pause_get_policy, 949 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1, 950 }, 951 { 952 .cmd = ETHTOOL_MSG_PAUSE_SET, 953 .flags = GENL_UNS_ADMIN_PERM, 954 .doit = ethnl_default_set_doit, 955 .policy = ethnl_pause_set_policy, 956 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1, 957 }, 958 { 959 .cmd = ETHTOOL_MSG_EEE_GET, 960 .doit = ethnl_default_doit, 961 .start = ethnl_default_start, 962 .dumpit = ethnl_default_dumpit, 963 .done = ethnl_default_done, 964 .policy = ethnl_eee_get_policy, 965 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1, 966 }, 967 { 968 .cmd = ETHTOOL_MSG_EEE_SET, 969 .flags = GENL_UNS_ADMIN_PERM, 970 .doit = ethnl_default_set_doit, 971 .policy = ethnl_eee_set_policy, 972 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1, 973 }, 974 { 975 .cmd = ETHTOOL_MSG_TSINFO_GET, 976 .doit = ethnl_default_doit, 977 .start = ethnl_default_start, 978 .dumpit = ethnl_default_dumpit, 979 .done = ethnl_default_done, 980 .policy = ethnl_tsinfo_get_policy, 981 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, 982 }, 983 { 984 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, 985 .flags = GENL_UNS_ADMIN_PERM, 986 .doit = ethnl_act_cable_test, 987 .policy = ethnl_cable_test_act_policy, 988 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1, 989 }, 990 { 991 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, 992 .flags = GENL_UNS_ADMIN_PERM, 993 .doit = ethnl_act_cable_test_tdr, 994 .policy = ethnl_cable_test_tdr_act_policy, 995 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1, 996 }, 997 { 998 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, 999 .doit = ethnl_tunnel_info_doit, 1000 .start = ethnl_tunnel_info_start, 1001 .dumpit = ethnl_tunnel_info_dumpit, 1002 .policy = ethnl_tunnel_info_get_policy, 1003 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, 1004 }, 1005 { 1006 .cmd = ETHTOOL_MSG_FEC_GET, 1007 .doit = ethnl_default_doit, 1008 .start = ethnl_default_start, 1009 .dumpit = ethnl_default_dumpit, 1010 .done = ethnl_default_done, 1011 .policy = ethnl_fec_get_policy, 1012 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1, 1013 }, 1014 { 1015 .cmd = ETHTOOL_MSG_FEC_SET, 1016 .flags = GENL_UNS_ADMIN_PERM, 1017 .doit = ethnl_default_set_doit, 1018 .policy = ethnl_fec_set_policy, 1019 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1, 1020 }, 1021 { 1022 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET, 1023 .flags = GENL_UNS_ADMIN_PERM, 1024 .doit = ethnl_default_doit, 1025 .start = ethnl_default_start, 1026 .dumpit = ethnl_default_dumpit, 1027 .done = ethnl_default_done, 1028 .policy = ethnl_module_eeprom_get_policy, 1029 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1, 1030 }, 1031 { 1032 .cmd = ETHTOOL_MSG_STATS_GET, 1033 .doit = ethnl_default_doit, 1034 .start = ethnl_default_start, 1035 .dumpit = ethnl_default_dumpit, 1036 .done = ethnl_default_done, 1037 .policy = ethnl_stats_get_policy, 1038 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1, 1039 }, 1040 { 1041 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET, 1042 .doit = ethnl_default_doit, 1043 .start = ethnl_default_start, 1044 .dumpit = ethnl_default_dumpit, 1045 .done = ethnl_default_done, 1046 .policy = ethnl_phc_vclocks_get_policy, 1047 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1, 1048 }, 1049 { 1050 .cmd = ETHTOOL_MSG_MODULE_GET, 1051 .doit = ethnl_default_doit, 1052 .start = ethnl_default_start, 1053 .dumpit = ethnl_default_dumpit, 1054 .done = ethnl_default_done, 1055 .policy = ethnl_module_get_policy, 1056 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1, 1057 }, 1058 { 1059 .cmd = ETHTOOL_MSG_MODULE_SET, 1060 .flags = GENL_UNS_ADMIN_PERM, 1061 .doit = ethnl_default_set_doit, 1062 .policy = ethnl_module_set_policy, 1063 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, 1064 }, 1065 { 1066 .cmd = ETHTOOL_MSG_PSE_GET, 1067 .doit = ethnl_default_doit, 1068 .start = ethnl_default_start, 1069 .dumpit = ethnl_default_dumpit, 1070 .done = ethnl_default_done, 1071 .policy = ethnl_pse_get_policy, 1072 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, 1073 }, 1074 { 1075 .cmd = ETHTOOL_MSG_PSE_SET, 1076 .flags = GENL_UNS_ADMIN_PERM, 1077 .doit = ethnl_default_set_doit, 1078 .policy = ethnl_pse_set_policy, 1079 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1, 1080 }, 1081 { 1082 .cmd = ETHTOOL_MSG_RSS_GET, 1083 .doit = ethnl_default_doit, 1084 .policy = ethnl_rss_get_policy, 1085 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1, 1086 }, 1087 { 1088 .cmd = ETHTOOL_MSG_PLCA_GET_CFG, 1089 .doit = ethnl_default_doit, 1090 .start = ethnl_default_start, 1091 .dumpit = ethnl_default_dumpit, 1092 .done = ethnl_default_done, 1093 .policy = ethnl_plca_get_cfg_policy, 1094 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1, 1095 }, 1096 { 1097 .cmd = ETHTOOL_MSG_PLCA_SET_CFG, 1098 .flags = GENL_UNS_ADMIN_PERM, 1099 .doit = ethnl_default_set_doit, 1100 .policy = ethnl_plca_set_cfg_policy, 1101 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1, 1102 }, 1103 { 1104 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS, 1105 .doit = ethnl_default_doit, 1106 .start = ethnl_default_start, 1107 .dumpit = ethnl_default_dumpit, 1108 .done = ethnl_default_done, 1109 .policy = ethnl_plca_get_status_policy, 1110 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1, 1111 }, 1112 { 1113 .cmd = ETHTOOL_MSG_MM_GET, 1114 .doit = ethnl_default_doit, 1115 .start = ethnl_default_start, 1116 .dumpit = ethnl_default_dumpit, 1117 .done = ethnl_default_done, 1118 .policy = ethnl_mm_get_policy, 1119 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1, 1120 }, 1121 { 1122 .cmd = ETHTOOL_MSG_MM_SET, 1123 .flags = GENL_UNS_ADMIN_PERM, 1124 .doit = ethnl_default_set_doit, 1125 .policy = ethnl_mm_set_policy, 1126 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, 1127 }, 1128 }; 1129 1130 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 1131 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 1132 }; 1133 1134 static struct genl_family ethtool_genl_family __ro_after_init = { 1135 .name = ETHTOOL_GENL_NAME, 1136 .version = ETHTOOL_GENL_VERSION, 1137 .netnsok = true, 1138 .parallel_ops = true, 1139 .ops = ethtool_genl_ops, 1140 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 1141 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1, 1142 .mcgrps = ethtool_nl_mcgrps, 1143 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 1144 }; 1145 1146 /* module setup */ 1147 1148 static int __init ethnl_init(void) 1149 { 1150 int ret; 1151 1152 ret = genl_register_family(ðtool_genl_family); 1153 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 1154 return ret; 1155 ethnl_ok = true; 1156 1157 ret = register_netdevice_notifier(ðnl_netdev_notifier); 1158 WARN(ret < 0, "ethtool: net device notifier registration failed"); 1159 return ret; 1160 } 1161 1162 subsys_initcall(ethnl_init); 1163