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 * @tb: parsed attributes 320 * @net: request netns 321 * @request_ops: struct request_ops for request type 322 * @extack: netlink extack for error reporting 323 * @require_dev: fail if no device identified in header 324 * 325 * Parse universal request header and call request specific ->parse_request() 326 * callback (if defined) to parse the rest of the message. 327 * 328 * Return: 0 on success or negative error code 329 */ 330 static int ethnl_default_parse(struct ethnl_req_info *req_info, 331 struct nlattr **tb, struct net *net, 332 const struct ethnl_request_ops *request_ops, 333 struct netlink_ext_ack *extack, bool require_dev) 334 { 335 int ret; 336 337 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], 338 net, extack, 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, 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->attrs, genl_info_net(info), 397 ops, info->extack, !ops->allow_nodev_do); 398 if (ret < 0) 399 goto err_dev; 400 ethnl_init_reply_data(reply_data, ops, req_info->dev); 401 402 rtnl_lock(); 403 ret = ops->prepare_data(req_info, reply_data, info); 404 rtnl_unlock(); 405 if (ret < 0) 406 goto err_cleanup; 407 ret = ops->reply_size(req_info, reply_data); 408 if (ret < 0) 409 goto err_cleanup; 410 reply_len = ret; 411 ret = -ENOMEM; 412 rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(), 413 req_info->dev, ops->reply_cmd, 414 ops->hdr_attr, info, &reply_payload); 415 if (!rskb) 416 goto err_cleanup; 417 hdr_len = rskb->len; 418 ret = ops->fill_reply(rskb, req_info, reply_data); 419 if (ret < 0) 420 goto err_msg; 421 WARN_ONCE(rskb->len - hdr_len > reply_len, 422 "ethnl cmd %d: calculated reply length %d, but consumed %d\n", 423 cmd, reply_len, rskb->len - hdr_len); 424 if (ops->cleanup_data) 425 ops->cleanup_data(reply_data); 426 427 genlmsg_end(rskb, reply_payload); 428 netdev_put(req_info->dev, &req_info->dev_tracker); 429 kfree(reply_data); 430 kfree(req_info); 431 return genlmsg_reply(rskb, info); 432 433 err_msg: 434 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 435 nlmsg_free(rskb); 436 err_cleanup: 437 if (ops->cleanup_data) 438 ops->cleanup_data(reply_data); 439 err_dev: 440 netdev_put(req_info->dev, &req_info->dev_tracker); 441 kfree(reply_data); 442 kfree(req_info); 443 return ret; 444 } 445 446 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, 447 const struct ethnl_dump_ctx *ctx, 448 struct netlink_callback *cb) 449 { 450 void *ehdr; 451 int ret; 452 453 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 454 ðtool_genl_family, NLM_F_MULTI, 455 ctx->ops->reply_cmd); 456 if (!ehdr) 457 return -EMSGSIZE; 458 459 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); 460 rtnl_lock(); 461 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL); 462 rtnl_unlock(); 463 if (ret < 0) 464 goto out; 465 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); 466 if (ret < 0) 467 goto out; 468 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); 469 470 out: 471 if (ctx->ops->cleanup_data) 472 ctx->ops->cleanup_data(ctx->reply_data); 473 ctx->reply_data->dev = NULL; 474 if (ret < 0) 475 genlmsg_cancel(skb, ehdr); 476 else 477 genlmsg_end(skb, ehdr); 478 return ret; 479 } 480 481 /* Default ->dumpit() handler for GET requests. Device iteration copied from 482 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable 483 * persistence as we cannot guarantee to hold RTNL lock through the whole 484 * function as rtnetnlink does. 485 */ 486 static int ethnl_default_dumpit(struct sk_buff *skb, 487 struct netlink_callback *cb) 488 { 489 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 490 struct net *net = sock_net(skb->sk); 491 struct net_device *dev; 492 int ret = 0; 493 494 rtnl_lock(); 495 for_each_netdev_dump(net, dev, ctx->pos_ifindex) { 496 dev_hold(dev); 497 rtnl_unlock(); 498 499 ret = ethnl_default_dump_one(skb, dev, ctx, cb); 500 501 rtnl_lock(); 502 dev_put(dev); 503 504 if (ret < 0 && ret != -EOPNOTSUPP) { 505 if (likely(skb->len)) 506 ret = skb->len; 507 break; 508 } 509 } 510 rtnl_unlock(); 511 512 return ret; 513 } 514 515 /* generic ->start() handler for GET requests */ 516 static 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->attrs, sock_net(cb->skb->sk), 542 ops, cb->extack, false); 543 if (req_info->dev) { 544 /* We ignore device specification in dump requests but as the 545 * same parser as for non-dump (doit) requests is used, it 546 * would take reference to the device if it finds one 547 */ 548 netdev_put(req_info->dev, &req_info->dev_tracker); 549 req_info->dev = NULL; 550 } 551 if (ret < 0) 552 goto free_reply_data; 553 554 ctx->ops = ops; 555 ctx->req_info = req_info; 556 ctx->reply_data = reply_data; 557 ctx->pos_ifindex = 0; 558 559 return 0; 560 561 free_reply_data: 562 kfree(reply_data); 563 free_req_info: 564 kfree(req_info); 565 566 return ret; 567 } 568 569 /* default ->done() handler for GET requests */ 570 static int ethnl_default_done(struct netlink_callback *cb) 571 { 572 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 573 574 kfree(ctx->reply_data); 575 kfree(ctx->req_info); 576 577 return 0; 578 } 579 580 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) 581 { 582 const struct ethnl_request_ops *ops; 583 struct ethnl_req_info req_info = {}; 584 const u8 cmd = info->genlhdr->cmd; 585 int ret; 586 587 ops = ethnl_default_requests[cmd]; 588 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 589 return -EOPNOTSUPP; 590 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 591 return -EINVAL; 592 593 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr], 594 genl_info_net(info), info->extack, 595 true); 596 if (ret < 0) 597 return ret; 598 599 if (ops->set_validate) { 600 ret = ops->set_validate(&req_info, info); 601 /* 0 means nothing to do */ 602 if (ret <= 0) 603 goto out_dev; 604 } 605 606 rtnl_lock(); 607 ret = ethnl_ops_begin(req_info.dev); 608 if (ret < 0) 609 goto out_rtnl; 610 611 ret = ops->set(&req_info, info); 612 if (ret <= 0) 613 goto out_ops; 614 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL); 615 616 ret = 0; 617 out_ops: 618 ethnl_ops_complete(req_info.dev); 619 out_rtnl: 620 rtnl_unlock(); 621 out_dev: 622 ethnl_parse_header_dev_put(&req_info); 623 return ret; 624 } 625 626 static const struct ethnl_request_ops * 627 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 628 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 629 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 630 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 631 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 632 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 633 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 634 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 635 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 636 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 637 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 638 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 639 [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops, 640 [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, 641 [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, 642 [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, 643 }; 644 645 /* default notification handler */ 646 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 647 const void *data) 648 { 649 struct ethnl_reply_data *reply_data; 650 const struct ethnl_request_ops *ops; 651 struct ethnl_req_info *req_info; 652 struct sk_buff *skb; 653 void *reply_payload; 654 int reply_len; 655 int ret; 656 657 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 658 !ethnl_default_notify_ops[cmd], 659 "unexpected notification type %u\n", cmd)) 660 return; 661 ops = ethnl_default_notify_ops[cmd]; 662 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 663 if (!req_info) 664 return; 665 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 666 if (!reply_data) { 667 kfree(req_info); 668 return; 669 } 670 671 req_info->dev = dev; 672 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 673 674 ethnl_init_reply_data(reply_data, ops, dev); 675 ret = ops->prepare_data(req_info, reply_data, NULL); 676 if (ret < 0) 677 goto err_cleanup; 678 ret = ops->reply_size(req_info, reply_data); 679 if (ret < 0) 680 goto err_cleanup; 681 reply_len = ret + ethnl_reply_header_size(); 682 skb = genlmsg_new(reply_len, GFP_KERNEL); 683 if (!skb) 684 goto err_cleanup; 685 reply_payload = ethnl_bcastmsg_put(skb, cmd); 686 if (!reply_payload) 687 goto err_skb; 688 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 689 if (ret < 0) 690 goto err_msg; 691 ret = ops->fill_reply(skb, req_info, reply_data); 692 if (ret < 0) 693 goto err_msg; 694 if (ops->cleanup_data) 695 ops->cleanup_data(reply_data); 696 697 genlmsg_end(skb, reply_payload); 698 kfree(reply_data); 699 kfree(req_info); 700 ethnl_multicast(skb, dev); 701 return; 702 703 err_msg: 704 WARN_ONCE(ret == -EMSGSIZE, 705 "calculated message payload length (%d) not sufficient\n", 706 reply_len); 707 err_skb: 708 nlmsg_free(skb); 709 err_cleanup: 710 if (ops->cleanup_data) 711 ops->cleanup_data(reply_data); 712 kfree(reply_data); 713 kfree(req_info); 714 return; 715 } 716 717 /* notifications */ 718 719 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 720 const void *data); 721 722 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 723 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 724 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 725 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 726 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 727 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 728 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 729 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 730 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 731 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 732 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 733 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 734 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify, 735 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, 736 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, 737 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, 738 }; 739 740 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 741 { 742 if (unlikely(!ethnl_ok)) 743 return; 744 ASSERT_RTNL(); 745 746 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 747 ethnl_notify_handlers[cmd])) 748 ethnl_notify_handlers[cmd](dev, cmd, data); 749 else 750 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 751 cmd, netdev_name(dev)); 752 } 753 EXPORT_SYMBOL(ethtool_notify); 754 755 static void ethnl_notify_features(struct netdev_notifier_info *info) 756 { 757 struct net_device *dev = netdev_notifier_info_to_dev(info); 758 759 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 760 } 761 762 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 763 void *ptr) 764 { 765 switch (event) { 766 case NETDEV_FEAT_CHANGE: 767 ethnl_notify_features(ptr); 768 break; 769 } 770 771 return NOTIFY_DONE; 772 } 773 774 static struct notifier_block ethnl_netdev_notifier = { 775 .notifier_call = ethnl_netdev_event, 776 }; 777 778 /* genetlink setup */ 779 780 static const struct genl_ops ethtool_genl_ops[] = { 781 { 782 .cmd = ETHTOOL_MSG_STRSET_GET, 783 .doit = ethnl_default_doit, 784 .start = ethnl_default_start, 785 .dumpit = ethnl_default_dumpit, 786 .done = ethnl_default_done, 787 .policy = ethnl_strset_get_policy, 788 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1, 789 }, 790 { 791 .cmd = ETHTOOL_MSG_LINKINFO_GET, 792 .doit = ethnl_default_doit, 793 .start = ethnl_default_start, 794 .dumpit = ethnl_default_dumpit, 795 .done = ethnl_default_done, 796 .policy = ethnl_linkinfo_get_policy, 797 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1, 798 }, 799 { 800 .cmd = ETHTOOL_MSG_LINKINFO_SET, 801 .flags = GENL_UNS_ADMIN_PERM, 802 .doit = ethnl_default_set_doit, 803 .policy = ethnl_linkinfo_set_policy, 804 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1, 805 }, 806 { 807 .cmd = ETHTOOL_MSG_LINKMODES_GET, 808 .doit = ethnl_default_doit, 809 .start = ethnl_default_start, 810 .dumpit = ethnl_default_dumpit, 811 .done = ethnl_default_done, 812 .policy = ethnl_linkmodes_get_policy, 813 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1, 814 }, 815 { 816 .cmd = ETHTOOL_MSG_LINKMODES_SET, 817 .flags = GENL_UNS_ADMIN_PERM, 818 .doit = ethnl_default_set_doit, 819 .policy = ethnl_linkmodes_set_policy, 820 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1, 821 }, 822 { 823 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 824 .doit = ethnl_default_doit, 825 .start = ethnl_default_start, 826 .dumpit = ethnl_default_dumpit, 827 .done = ethnl_default_done, 828 .policy = ethnl_linkstate_get_policy, 829 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1, 830 }, 831 { 832 .cmd = ETHTOOL_MSG_DEBUG_GET, 833 .doit = ethnl_default_doit, 834 .start = ethnl_default_start, 835 .dumpit = ethnl_default_dumpit, 836 .done = ethnl_default_done, 837 .policy = ethnl_debug_get_policy, 838 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1, 839 }, 840 { 841 .cmd = ETHTOOL_MSG_DEBUG_SET, 842 .flags = GENL_UNS_ADMIN_PERM, 843 .doit = ethnl_default_set_doit, 844 .policy = ethnl_debug_set_policy, 845 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1, 846 }, 847 { 848 .cmd = ETHTOOL_MSG_WOL_GET, 849 .flags = GENL_UNS_ADMIN_PERM, 850 .doit = ethnl_default_doit, 851 .start = ethnl_default_start, 852 .dumpit = ethnl_default_dumpit, 853 .done = ethnl_default_done, 854 .policy = ethnl_wol_get_policy, 855 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1, 856 }, 857 { 858 .cmd = ETHTOOL_MSG_WOL_SET, 859 .flags = GENL_UNS_ADMIN_PERM, 860 .doit = ethnl_default_set_doit, 861 .policy = ethnl_wol_set_policy, 862 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1, 863 }, 864 { 865 .cmd = ETHTOOL_MSG_FEATURES_GET, 866 .doit = ethnl_default_doit, 867 .start = ethnl_default_start, 868 .dumpit = ethnl_default_dumpit, 869 .done = ethnl_default_done, 870 .policy = ethnl_features_get_policy, 871 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1, 872 }, 873 { 874 .cmd = ETHTOOL_MSG_FEATURES_SET, 875 .flags = GENL_UNS_ADMIN_PERM, 876 .doit = ethnl_set_features, 877 .policy = ethnl_features_set_policy, 878 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1, 879 }, 880 { 881 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 882 .doit = ethnl_default_doit, 883 .start = ethnl_default_start, 884 .dumpit = ethnl_default_dumpit, 885 .done = ethnl_default_done, 886 .policy = ethnl_privflags_get_policy, 887 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1, 888 }, 889 { 890 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 891 .flags = GENL_UNS_ADMIN_PERM, 892 .doit = ethnl_default_set_doit, 893 .policy = ethnl_privflags_set_policy, 894 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1, 895 }, 896 { 897 .cmd = ETHTOOL_MSG_RINGS_GET, 898 .doit = ethnl_default_doit, 899 .start = ethnl_default_start, 900 .dumpit = ethnl_default_dumpit, 901 .done = ethnl_default_done, 902 .policy = ethnl_rings_get_policy, 903 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1, 904 }, 905 { 906 .cmd = ETHTOOL_MSG_RINGS_SET, 907 .flags = GENL_UNS_ADMIN_PERM, 908 .doit = ethnl_default_set_doit, 909 .policy = ethnl_rings_set_policy, 910 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1, 911 }, 912 { 913 .cmd = ETHTOOL_MSG_CHANNELS_GET, 914 .doit = ethnl_default_doit, 915 .start = ethnl_default_start, 916 .dumpit = ethnl_default_dumpit, 917 .done = ethnl_default_done, 918 .policy = ethnl_channels_get_policy, 919 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1, 920 }, 921 { 922 .cmd = ETHTOOL_MSG_CHANNELS_SET, 923 .flags = GENL_UNS_ADMIN_PERM, 924 .doit = ethnl_default_set_doit, 925 .policy = ethnl_channels_set_policy, 926 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1, 927 }, 928 { 929 .cmd = ETHTOOL_MSG_COALESCE_GET, 930 .doit = ethnl_default_doit, 931 .start = ethnl_default_start, 932 .dumpit = ethnl_default_dumpit, 933 .done = ethnl_default_done, 934 .policy = ethnl_coalesce_get_policy, 935 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1, 936 }, 937 { 938 .cmd = ETHTOOL_MSG_COALESCE_SET, 939 .flags = GENL_UNS_ADMIN_PERM, 940 .doit = ethnl_default_set_doit, 941 .policy = ethnl_coalesce_set_policy, 942 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1, 943 }, 944 { 945 .cmd = ETHTOOL_MSG_PAUSE_GET, 946 .doit = ethnl_default_doit, 947 .start = ethnl_default_start, 948 .dumpit = ethnl_default_dumpit, 949 .done = ethnl_default_done, 950 .policy = ethnl_pause_get_policy, 951 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1, 952 }, 953 { 954 .cmd = ETHTOOL_MSG_PAUSE_SET, 955 .flags = GENL_UNS_ADMIN_PERM, 956 .doit = ethnl_default_set_doit, 957 .policy = ethnl_pause_set_policy, 958 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1, 959 }, 960 { 961 .cmd = ETHTOOL_MSG_EEE_GET, 962 .doit = ethnl_default_doit, 963 .start = ethnl_default_start, 964 .dumpit = ethnl_default_dumpit, 965 .done = ethnl_default_done, 966 .policy = ethnl_eee_get_policy, 967 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1, 968 }, 969 { 970 .cmd = ETHTOOL_MSG_EEE_SET, 971 .flags = GENL_UNS_ADMIN_PERM, 972 .doit = ethnl_default_set_doit, 973 .policy = ethnl_eee_set_policy, 974 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1, 975 }, 976 { 977 .cmd = ETHTOOL_MSG_TSINFO_GET, 978 .doit = ethnl_default_doit, 979 .start = ethnl_default_start, 980 .dumpit = ethnl_default_dumpit, 981 .done = ethnl_default_done, 982 .policy = ethnl_tsinfo_get_policy, 983 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, 984 }, 985 { 986 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, 987 .flags = GENL_UNS_ADMIN_PERM, 988 .doit = ethnl_act_cable_test, 989 .policy = ethnl_cable_test_act_policy, 990 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1, 991 }, 992 { 993 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, 994 .flags = GENL_UNS_ADMIN_PERM, 995 .doit = ethnl_act_cable_test_tdr, 996 .policy = ethnl_cable_test_tdr_act_policy, 997 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1, 998 }, 999 { 1000 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, 1001 .doit = ethnl_tunnel_info_doit, 1002 .start = ethnl_tunnel_info_start, 1003 .dumpit = ethnl_tunnel_info_dumpit, 1004 .policy = ethnl_tunnel_info_get_policy, 1005 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, 1006 }, 1007 { 1008 .cmd = ETHTOOL_MSG_FEC_GET, 1009 .doit = ethnl_default_doit, 1010 .start = ethnl_default_start, 1011 .dumpit = ethnl_default_dumpit, 1012 .done = ethnl_default_done, 1013 .policy = ethnl_fec_get_policy, 1014 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1, 1015 }, 1016 { 1017 .cmd = ETHTOOL_MSG_FEC_SET, 1018 .flags = GENL_UNS_ADMIN_PERM, 1019 .doit = ethnl_default_set_doit, 1020 .policy = ethnl_fec_set_policy, 1021 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1, 1022 }, 1023 { 1024 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET, 1025 .flags = GENL_UNS_ADMIN_PERM, 1026 .doit = ethnl_default_doit, 1027 .start = ethnl_default_start, 1028 .dumpit = ethnl_default_dumpit, 1029 .done = ethnl_default_done, 1030 .policy = ethnl_module_eeprom_get_policy, 1031 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1, 1032 }, 1033 { 1034 .cmd = ETHTOOL_MSG_STATS_GET, 1035 .doit = ethnl_default_doit, 1036 .start = ethnl_default_start, 1037 .dumpit = ethnl_default_dumpit, 1038 .done = ethnl_default_done, 1039 .policy = ethnl_stats_get_policy, 1040 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1, 1041 }, 1042 { 1043 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET, 1044 .doit = ethnl_default_doit, 1045 .start = ethnl_default_start, 1046 .dumpit = ethnl_default_dumpit, 1047 .done = ethnl_default_done, 1048 .policy = ethnl_phc_vclocks_get_policy, 1049 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1, 1050 }, 1051 { 1052 .cmd = ETHTOOL_MSG_MODULE_GET, 1053 .doit = ethnl_default_doit, 1054 .start = ethnl_default_start, 1055 .dumpit = ethnl_default_dumpit, 1056 .done = ethnl_default_done, 1057 .policy = ethnl_module_get_policy, 1058 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1, 1059 }, 1060 { 1061 .cmd = ETHTOOL_MSG_MODULE_SET, 1062 .flags = GENL_UNS_ADMIN_PERM, 1063 .doit = ethnl_default_set_doit, 1064 .policy = ethnl_module_set_policy, 1065 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, 1066 }, 1067 { 1068 .cmd = ETHTOOL_MSG_PSE_GET, 1069 .doit = ethnl_default_doit, 1070 .start = ethnl_default_start, 1071 .dumpit = ethnl_default_dumpit, 1072 .done = ethnl_default_done, 1073 .policy = ethnl_pse_get_policy, 1074 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, 1075 }, 1076 { 1077 .cmd = ETHTOOL_MSG_PSE_SET, 1078 .flags = GENL_UNS_ADMIN_PERM, 1079 .doit = ethnl_default_set_doit, 1080 .policy = ethnl_pse_set_policy, 1081 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1, 1082 }, 1083 { 1084 .cmd = ETHTOOL_MSG_RSS_GET, 1085 .doit = ethnl_default_doit, 1086 .policy = ethnl_rss_get_policy, 1087 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1, 1088 }, 1089 { 1090 .cmd = ETHTOOL_MSG_PLCA_GET_CFG, 1091 .doit = ethnl_default_doit, 1092 .start = ethnl_default_start, 1093 .dumpit = ethnl_default_dumpit, 1094 .done = ethnl_default_done, 1095 .policy = ethnl_plca_get_cfg_policy, 1096 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1, 1097 }, 1098 { 1099 .cmd = ETHTOOL_MSG_PLCA_SET_CFG, 1100 .flags = GENL_UNS_ADMIN_PERM, 1101 .doit = ethnl_default_set_doit, 1102 .policy = ethnl_plca_set_cfg_policy, 1103 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1, 1104 }, 1105 { 1106 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS, 1107 .doit = ethnl_default_doit, 1108 .start = ethnl_default_start, 1109 .dumpit = ethnl_default_dumpit, 1110 .done = ethnl_default_done, 1111 .policy = ethnl_plca_get_status_policy, 1112 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1, 1113 }, 1114 { 1115 .cmd = ETHTOOL_MSG_MM_GET, 1116 .doit = ethnl_default_doit, 1117 .start = ethnl_default_start, 1118 .dumpit = ethnl_default_dumpit, 1119 .done = ethnl_default_done, 1120 .policy = ethnl_mm_get_policy, 1121 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1, 1122 }, 1123 { 1124 .cmd = ETHTOOL_MSG_MM_SET, 1125 .flags = GENL_UNS_ADMIN_PERM, 1126 .doit = ethnl_default_set_doit, 1127 .policy = ethnl_mm_set_policy, 1128 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, 1129 }, 1130 }; 1131 1132 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 1133 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 1134 }; 1135 1136 static struct genl_family ethtool_genl_family __ro_after_init = { 1137 .name = ETHTOOL_GENL_NAME, 1138 .version = ETHTOOL_GENL_VERSION, 1139 .netnsok = true, 1140 .parallel_ops = true, 1141 .ops = ethtool_genl_ops, 1142 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 1143 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1, 1144 .mcgrps = ethtool_nl_mcgrps, 1145 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 1146 }; 1147 1148 /* module setup */ 1149 1150 static int __init ethnl_init(void) 1151 { 1152 int ret; 1153 1154 ret = genl_register_family(ðtool_genl_family); 1155 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 1156 return ret; 1157 ethnl_ok = true; 1158 1159 ret = register_netdevice_notifier(ðnl_netdev_notifier); 1160 WARN(ret < 0, "ethtool: net device notifier registration failed"); 1161 return ret; 1162 } 1163 1164 subsys_initcall(ethnl_init); 1165