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 NL_SET_ERR_MSG(extack, "request header missing"); 100 return -EINVAL; 101 } 102 /* No validation here, command policy should have a nested policy set 103 * for the header, therefore validation should have already been done. 104 */ 105 ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header, 106 NULL, extack); 107 if (ret < 0) 108 return ret; 109 if (tb[ETHTOOL_A_HEADER_FLAGS]) 110 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]); 111 112 devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME]; 113 if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) { 114 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]); 115 116 dev = dev_get_by_index(net, ifindex); 117 if (!dev) { 118 NL_SET_ERR_MSG_ATTR(extack, 119 tb[ETHTOOL_A_HEADER_DEV_INDEX], 120 "no device matches ifindex"); 121 return -ENODEV; 122 } 123 /* if both ifindex and ifname are passed, they must match */ 124 if (devname_attr && 125 strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) { 126 dev_put(dev); 127 NL_SET_ERR_MSG_ATTR(extack, header, 128 "ifindex and name do not match"); 129 return -ENODEV; 130 } 131 } else if (devname_attr) { 132 dev = dev_get_by_name(net, nla_data(devname_attr)); 133 if (!dev) { 134 NL_SET_ERR_MSG_ATTR(extack, devname_attr, 135 "no device matches name"); 136 return -ENODEV; 137 } 138 } else if (require_dev) { 139 NL_SET_ERR_MSG_ATTR(extack, header, 140 "neither ifindex nor name specified"); 141 return -EINVAL; 142 } 143 144 req_info->dev = dev; 145 if (dev) 146 netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL); 147 req_info->flags = flags; 148 return 0; 149 } 150 151 /** 152 * ethnl_fill_reply_header() - Put common header into a reply message 153 * @skb: skb with the message 154 * @dev: network device to describe in header 155 * @attrtype: attribute type to use for the nest 156 * 157 * Create a nested attribute with attributes describing given network device. 158 * 159 * Return: 0 on success, error value (-EMSGSIZE only) on error 160 */ 161 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev, 162 u16 attrtype) 163 { 164 struct nlattr *nest; 165 166 if (!dev) 167 return 0; 168 nest = nla_nest_start(skb, attrtype); 169 if (!nest) 170 return -EMSGSIZE; 171 172 if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) || 173 nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name)) 174 goto nla_put_failure; 175 /* If more attributes are put into reply header, ethnl_header_size() 176 * must be updated to account for them. 177 */ 178 179 nla_nest_end(skb, nest); 180 return 0; 181 182 nla_put_failure: 183 nla_nest_cancel(skb, nest); 184 return -EMSGSIZE; 185 } 186 187 /** 188 * ethnl_reply_init() - Create skb for a reply and fill device identification 189 * @payload: payload length (without netlink and genetlink header) 190 * @dev: device the reply is about (may be null) 191 * @cmd: ETHTOOL_MSG_* message type for reply 192 * @hdr_attrtype: attribute type for common header 193 * @info: genetlink info of the received packet we respond to 194 * @ehdrp: place to store payload pointer returned by genlmsg_new() 195 * 196 * Return: pointer to allocated skb on success, NULL on error 197 */ 198 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd, 199 u16 hdr_attrtype, struct genl_info *info, 200 void **ehdrp) 201 { 202 struct sk_buff *skb; 203 204 skb = genlmsg_new(payload, GFP_KERNEL); 205 if (!skb) 206 goto err; 207 *ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd); 208 if (!*ehdrp) 209 goto err_free; 210 211 if (dev) { 212 int ret; 213 214 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype); 215 if (ret < 0) 216 goto err_free; 217 } 218 return skb; 219 220 err_free: 221 nlmsg_free(skb); 222 err: 223 if (info) 224 GENL_SET_ERR_MSG(info, "failed to setup reply message"); 225 return NULL; 226 } 227 228 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd) 229 { 230 return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 231 ðtool_genl_family, 0, cmd); 232 } 233 234 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd) 235 { 236 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0, 237 cmd); 238 } 239 240 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev) 241 { 242 return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb, 243 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL); 244 } 245 246 /* GET request helpers */ 247 248 /** 249 * struct ethnl_dump_ctx - context structure for generic dumpit() callback 250 * @ops: request ops of currently processed message type 251 * @req_info: parsed request header of processed request 252 * @reply_data: data needed to compose the reply 253 * @pos_hash: saved iteration position - hashbucket 254 * @pos_idx: saved iteration position - index 255 * 256 * These parameters are kept in struct netlink_callback as context preserved 257 * between iterations. They are initialized by ethnl_default_start() and used 258 * in ethnl_default_dumpit() and ethnl_default_done(). 259 */ 260 struct ethnl_dump_ctx { 261 const struct ethnl_request_ops *ops; 262 struct ethnl_req_info *req_info; 263 struct ethnl_reply_data *reply_data; 264 int pos_hash; 265 int pos_idx; 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 int s_idx = ctx->pos_idx; 492 int h, idx = 0; 493 int ret = 0; 494 495 rtnl_lock(); 496 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 497 struct hlist_head *head; 498 struct net_device *dev; 499 unsigned int seq; 500 501 head = &net->dev_index_head[h]; 502 503 restart_chain: 504 seq = net->dev_base_seq; 505 cb->seq = seq; 506 idx = 0; 507 hlist_for_each_entry(dev, head, index_hlist) { 508 if (idx < s_idx) 509 goto cont; 510 dev_hold(dev); 511 rtnl_unlock(); 512 513 ret = ethnl_default_dump_one(skb, dev, ctx, cb); 514 dev_put(dev); 515 if (ret < 0) { 516 if (ret == -EOPNOTSUPP) 517 goto lock_and_cont; 518 if (likely(skb->len)) 519 ret = skb->len; 520 goto out; 521 } 522 lock_and_cont: 523 rtnl_lock(); 524 if (net->dev_base_seq != seq) { 525 s_idx = idx + 1; 526 goto restart_chain; 527 } 528 cont: 529 idx++; 530 } 531 532 } 533 rtnl_unlock(); 534 535 out: 536 ctx->pos_hash = h; 537 ctx->pos_idx = idx; 538 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 539 540 return ret; 541 } 542 543 /* generic ->start() handler for GET requests */ 544 static int ethnl_default_start(struct netlink_callback *cb) 545 { 546 const struct genl_dumpit_info *info = genl_dumpit_info(cb); 547 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 548 struct ethnl_reply_data *reply_data; 549 const struct ethnl_request_ops *ops; 550 struct ethnl_req_info *req_info; 551 struct genlmsghdr *ghdr; 552 int ret; 553 554 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 555 556 ghdr = nlmsg_data(cb->nlh); 557 ops = ethnl_default_requests[ghdr->cmd]; 558 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 559 return -EOPNOTSUPP; 560 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 561 if (!req_info) 562 return -ENOMEM; 563 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 564 if (!reply_data) { 565 ret = -ENOMEM; 566 goto free_req_info; 567 } 568 569 ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk), 570 ops, cb->extack, false); 571 if (req_info->dev) { 572 /* We ignore device specification in dump requests but as the 573 * same parser as for non-dump (doit) requests is used, it 574 * would take reference to the device if it finds one 575 */ 576 netdev_put(req_info->dev, &req_info->dev_tracker); 577 req_info->dev = NULL; 578 } 579 if (ret < 0) 580 goto free_reply_data; 581 582 ctx->ops = ops; 583 ctx->req_info = req_info; 584 ctx->reply_data = reply_data; 585 ctx->pos_hash = 0; 586 ctx->pos_idx = 0; 587 588 return 0; 589 590 free_reply_data: 591 kfree(reply_data); 592 free_req_info: 593 kfree(req_info); 594 595 return ret; 596 } 597 598 /* default ->done() handler for GET requests */ 599 static int ethnl_default_done(struct netlink_callback *cb) 600 { 601 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 602 603 kfree(ctx->reply_data); 604 kfree(ctx->req_info); 605 606 return 0; 607 } 608 609 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) 610 { 611 const struct ethnl_request_ops *ops; 612 struct ethnl_req_info req_info = {}; 613 const u8 cmd = info->genlhdr->cmd; 614 int ret; 615 616 ops = ethnl_default_requests[cmd]; 617 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 618 return -EOPNOTSUPP; 619 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 620 return -EINVAL; 621 622 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr], 623 genl_info_net(info), info->extack, 624 true); 625 if (ret < 0) 626 return ret; 627 628 if (ops->set_validate) { 629 ret = ops->set_validate(&req_info, info); 630 /* 0 means nothing to do */ 631 if (ret <= 0) 632 goto out_dev; 633 } 634 635 rtnl_lock(); 636 ret = ethnl_ops_begin(req_info.dev); 637 if (ret < 0) 638 goto out_rtnl; 639 640 ret = ops->set(&req_info, info); 641 if (ret <= 0) 642 goto out_ops; 643 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL); 644 645 ret = 0; 646 out_ops: 647 ethnl_ops_complete(req_info.dev); 648 out_rtnl: 649 rtnl_unlock(); 650 out_dev: 651 ethnl_parse_header_dev_put(&req_info); 652 return ret; 653 } 654 655 static const struct ethnl_request_ops * 656 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 657 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 658 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 659 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 660 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 661 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 662 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 663 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 664 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 665 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 666 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 667 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 668 [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops, 669 [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, 670 [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, 671 [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, 672 }; 673 674 /* default notification handler */ 675 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 676 const void *data) 677 { 678 struct ethnl_reply_data *reply_data; 679 const struct ethnl_request_ops *ops; 680 struct ethnl_req_info *req_info; 681 struct sk_buff *skb; 682 void *reply_payload; 683 int reply_len; 684 int ret; 685 686 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 687 !ethnl_default_notify_ops[cmd], 688 "unexpected notification type %u\n", cmd)) 689 return; 690 ops = ethnl_default_notify_ops[cmd]; 691 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 692 if (!req_info) 693 return; 694 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 695 if (!reply_data) { 696 kfree(req_info); 697 return; 698 } 699 700 req_info->dev = dev; 701 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 702 703 ethnl_init_reply_data(reply_data, ops, dev); 704 ret = ops->prepare_data(req_info, reply_data, NULL); 705 if (ret < 0) 706 goto err_cleanup; 707 ret = ops->reply_size(req_info, reply_data); 708 if (ret < 0) 709 goto err_cleanup; 710 reply_len = ret + ethnl_reply_header_size(); 711 skb = genlmsg_new(reply_len, GFP_KERNEL); 712 if (!skb) 713 goto err_cleanup; 714 reply_payload = ethnl_bcastmsg_put(skb, cmd); 715 if (!reply_payload) 716 goto err_skb; 717 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 718 if (ret < 0) 719 goto err_msg; 720 ret = ops->fill_reply(skb, req_info, reply_data); 721 if (ret < 0) 722 goto err_msg; 723 if (ops->cleanup_data) 724 ops->cleanup_data(reply_data); 725 726 genlmsg_end(skb, reply_payload); 727 kfree(reply_data); 728 kfree(req_info); 729 ethnl_multicast(skb, dev); 730 return; 731 732 err_msg: 733 WARN_ONCE(ret == -EMSGSIZE, 734 "calculated message payload length (%d) not sufficient\n", 735 reply_len); 736 err_skb: 737 nlmsg_free(skb); 738 err_cleanup: 739 if (ops->cleanup_data) 740 ops->cleanup_data(reply_data); 741 kfree(reply_data); 742 kfree(req_info); 743 return; 744 } 745 746 /* notifications */ 747 748 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 749 const void *data); 750 751 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 752 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 753 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 754 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 755 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 756 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 757 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 758 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 759 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 760 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 761 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 762 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 763 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify, 764 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, 765 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, 766 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, 767 }; 768 769 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 770 { 771 if (unlikely(!ethnl_ok)) 772 return; 773 ASSERT_RTNL(); 774 775 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 776 ethnl_notify_handlers[cmd])) 777 ethnl_notify_handlers[cmd](dev, cmd, data); 778 else 779 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 780 cmd, netdev_name(dev)); 781 } 782 EXPORT_SYMBOL(ethtool_notify); 783 784 static void ethnl_notify_features(struct netdev_notifier_info *info) 785 { 786 struct net_device *dev = netdev_notifier_info_to_dev(info); 787 788 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 789 } 790 791 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 792 void *ptr) 793 { 794 switch (event) { 795 case NETDEV_FEAT_CHANGE: 796 ethnl_notify_features(ptr); 797 break; 798 } 799 800 return NOTIFY_DONE; 801 } 802 803 static struct notifier_block ethnl_netdev_notifier = { 804 .notifier_call = ethnl_netdev_event, 805 }; 806 807 /* genetlink setup */ 808 809 static const struct genl_ops ethtool_genl_ops[] = { 810 { 811 .cmd = ETHTOOL_MSG_STRSET_GET, 812 .doit = ethnl_default_doit, 813 .start = ethnl_default_start, 814 .dumpit = ethnl_default_dumpit, 815 .done = ethnl_default_done, 816 .policy = ethnl_strset_get_policy, 817 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1, 818 }, 819 { 820 .cmd = ETHTOOL_MSG_LINKINFO_GET, 821 .doit = ethnl_default_doit, 822 .start = ethnl_default_start, 823 .dumpit = ethnl_default_dumpit, 824 .done = ethnl_default_done, 825 .policy = ethnl_linkinfo_get_policy, 826 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1, 827 }, 828 { 829 .cmd = ETHTOOL_MSG_LINKINFO_SET, 830 .flags = GENL_UNS_ADMIN_PERM, 831 .doit = ethnl_default_set_doit, 832 .policy = ethnl_linkinfo_set_policy, 833 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1, 834 }, 835 { 836 .cmd = ETHTOOL_MSG_LINKMODES_GET, 837 .doit = ethnl_default_doit, 838 .start = ethnl_default_start, 839 .dumpit = ethnl_default_dumpit, 840 .done = ethnl_default_done, 841 .policy = ethnl_linkmodes_get_policy, 842 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1, 843 }, 844 { 845 .cmd = ETHTOOL_MSG_LINKMODES_SET, 846 .flags = GENL_UNS_ADMIN_PERM, 847 .doit = ethnl_default_set_doit, 848 .policy = ethnl_linkmodes_set_policy, 849 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1, 850 }, 851 { 852 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 853 .doit = ethnl_default_doit, 854 .start = ethnl_default_start, 855 .dumpit = ethnl_default_dumpit, 856 .done = ethnl_default_done, 857 .policy = ethnl_linkstate_get_policy, 858 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1, 859 }, 860 { 861 .cmd = ETHTOOL_MSG_DEBUG_GET, 862 .doit = ethnl_default_doit, 863 .start = ethnl_default_start, 864 .dumpit = ethnl_default_dumpit, 865 .done = ethnl_default_done, 866 .policy = ethnl_debug_get_policy, 867 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1, 868 }, 869 { 870 .cmd = ETHTOOL_MSG_DEBUG_SET, 871 .flags = GENL_UNS_ADMIN_PERM, 872 .doit = ethnl_default_set_doit, 873 .policy = ethnl_debug_set_policy, 874 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1, 875 }, 876 { 877 .cmd = ETHTOOL_MSG_WOL_GET, 878 .flags = GENL_UNS_ADMIN_PERM, 879 .doit = ethnl_default_doit, 880 .start = ethnl_default_start, 881 .dumpit = ethnl_default_dumpit, 882 .done = ethnl_default_done, 883 .policy = ethnl_wol_get_policy, 884 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1, 885 }, 886 { 887 .cmd = ETHTOOL_MSG_WOL_SET, 888 .flags = GENL_UNS_ADMIN_PERM, 889 .doit = ethnl_default_set_doit, 890 .policy = ethnl_wol_set_policy, 891 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1, 892 }, 893 { 894 .cmd = ETHTOOL_MSG_FEATURES_GET, 895 .doit = ethnl_default_doit, 896 .start = ethnl_default_start, 897 .dumpit = ethnl_default_dumpit, 898 .done = ethnl_default_done, 899 .policy = ethnl_features_get_policy, 900 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1, 901 }, 902 { 903 .cmd = ETHTOOL_MSG_FEATURES_SET, 904 .flags = GENL_UNS_ADMIN_PERM, 905 .doit = ethnl_set_features, 906 .policy = ethnl_features_set_policy, 907 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1, 908 }, 909 { 910 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 911 .doit = ethnl_default_doit, 912 .start = ethnl_default_start, 913 .dumpit = ethnl_default_dumpit, 914 .done = ethnl_default_done, 915 .policy = ethnl_privflags_get_policy, 916 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1, 917 }, 918 { 919 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 920 .flags = GENL_UNS_ADMIN_PERM, 921 .doit = ethnl_default_set_doit, 922 .policy = ethnl_privflags_set_policy, 923 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1, 924 }, 925 { 926 .cmd = ETHTOOL_MSG_RINGS_GET, 927 .doit = ethnl_default_doit, 928 .start = ethnl_default_start, 929 .dumpit = ethnl_default_dumpit, 930 .done = ethnl_default_done, 931 .policy = ethnl_rings_get_policy, 932 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1, 933 }, 934 { 935 .cmd = ETHTOOL_MSG_RINGS_SET, 936 .flags = GENL_UNS_ADMIN_PERM, 937 .doit = ethnl_default_set_doit, 938 .policy = ethnl_rings_set_policy, 939 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1, 940 }, 941 { 942 .cmd = ETHTOOL_MSG_CHANNELS_GET, 943 .doit = ethnl_default_doit, 944 .start = ethnl_default_start, 945 .dumpit = ethnl_default_dumpit, 946 .done = ethnl_default_done, 947 .policy = ethnl_channels_get_policy, 948 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1, 949 }, 950 { 951 .cmd = ETHTOOL_MSG_CHANNELS_SET, 952 .flags = GENL_UNS_ADMIN_PERM, 953 .doit = ethnl_default_set_doit, 954 .policy = ethnl_channels_set_policy, 955 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1, 956 }, 957 { 958 .cmd = ETHTOOL_MSG_COALESCE_GET, 959 .doit = ethnl_default_doit, 960 .start = ethnl_default_start, 961 .dumpit = ethnl_default_dumpit, 962 .done = ethnl_default_done, 963 .policy = ethnl_coalesce_get_policy, 964 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1, 965 }, 966 { 967 .cmd = ETHTOOL_MSG_COALESCE_SET, 968 .flags = GENL_UNS_ADMIN_PERM, 969 .doit = ethnl_default_set_doit, 970 .policy = ethnl_coalesce_set_policy, 971 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1, 972 }, 973 { 974 .cmd = ETHTOOL_MSG_PAUSE_GET, 975 .doit = ethnl_default_doit, 976 .start = ethnl_default_start, 977 .dumpit = ethnl_default_dumpit, 978 .done = ethnl_default_done, 979 .policy = ethnl_pause_get_policy, 980 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1, 981 }, 982 { 983 .cmd = ETHTOOL_MSG_PAUSE_SET, 984 .flags = GENL_UNS_ADMIN_PERM, 985 .doit = ethnl_default_set_doit, 986 .policy = ethnl_pause_set_policy, 987 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1, 988 }, 989 { 990 .cmd = ETHTOOL_MSG_EEE_GET, 991 .doit = ethnl_default_doit, 992 .start = ethnl_default_start, 993 .dumpit = ethnl_default_dumpit, 994 .done = ethnl_default_done, 995 .policy = ethnl_eee_get_policy, 996 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1, 997 }, 998 { 999 .cmd = ETHTOOL_MSG_EEE_SET, 1000 .flags = GENL_UNS_ADMIN_PERM, 1001 .doit = ethnl_default_set_doit, 1002 .policy = ethnl_eee_set_policy, 1003 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1, 1004 }, 1005 { 1006 .cmd = ETHTOOL_MSG_TSINFO_GET, 1007 .doit = ethnl_default_doit, 1008 .start = ethnl_default_start, 1009 .dumpit = ethnl_default_dumpit, 1010 .done = ethnl_default_done, 1011 .policy = ethnl_tsinfo_get_policy, 1012 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, 1013 }, 1014 { 1015 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, 1016 .flags = GENL_UNS_ADMIN_PERM, 1017 .doit = ethnl_act_cable_test, 1018 .policy = ethnl_cable_test_act_policy, 1019 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1, 1020 }, 1021 { 1022 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, 1023 .flags = GENL_UNS_ADMIN_PERM, 1024 .doit = ethnl_act_cable_test_tdr, 1025 .policy = ethnl_cable_test_tdr_act_policy, 1026 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1, 1027 }, 1028 { 1029 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, 1030 .doit = ethnl_tunnel_info_doit, 1031 .start = ethnl_tunnel_info_start, 1032 .dumpit = ethnl_tunnel_info_dumpit, 1033 .policy = ethnl_tunnel_info_get_policy, 1034 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, 1035 }, 1036 { 1037 .cmd = ETHTOOL_MSG_FEC_GET, 1038 .doit = ethnl_default_doit, 1039 .start = ethnl_default_start, 1040 .dumpit = ethnl_default_dumpit, 1041 .done = ethnl_default_done, 1042 .policy = ethnl_fec_get_policy, 1043 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1, 1044 }, 1045 { 1046 .cmd = ETHTOOL_MSG_FEC_SET, 1047 .flags = GENL_UNS_ADMIN_PERM, 1048 .doit = ethnl_default_set_doit, 1049 .policy = ethnl_fec_set_policy, 1050 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1, 1051 }, 1052 { 1053 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET, 1054 .flags = GENL_UNS_ADMIN_PERM, 1055 .doit = ethnl_default_doit, 1056 .start = ethnl_default_start, 1057 .dumpit = ethnl_default_dumpit, 1058 .done = ethnl_default_done, 1059 .policy = ethnl_module_eeprom_get_policy, 1060 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1, 1061 }, 1062 { 1063 .cmd = ETHTOOL_MSG_STATS_GET, 1064 .doit = ethnl_default_doit, 1065 .start = ethnl_default_start, 1066 .dumpit = ethnl_default_dumpit, 1067 .done = ethnl_default_done, 1068 .policy = ethnl_stats_get_policy, 1069 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1, 1070 }, 1071 { 1072 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET, 1073 .doit = ethnl_default_doit, 1074 .start = ethnl_default_start, 1075 .dumpit = ethnl_default_dumpit, 1076 .done = ethnl_default_done, 1077 .policy = ethnl_phc_vclocks_get_policy, 1078 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1, 1079 }, 1080 { 1081 .cmd = ETHTOOL_MSG_MODULE_GET, 1082 .doit = ethnl_default_doit, 1083 .start = ethnl_default_start, 1084 .dumpit = ethnl_default_dumpit, 1085 .done = ethnl_default_done, 1086 .policy = ethnl_module_get_policy, 1087 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1, 1088 }, 1089 { 1090 .cmd = ETHTOOL_MSG_MODULE_SET, 1091 .flags = GENL_UNS_ADMIN_PERM, 1092 .doit = ethnl_default_set_doit, 1093 .policy = ethnl_module_set_policy, 1094 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, 1095 }, 1096 { 1097 .cmd = ETHTOOL_MSG_PSE_GET, 1098 .doit = ethnl_default_doit, 1099 .start = ethnl_default_start, 1100 .dumpit = ethnl_default_dumpit, 1101 .done = ethnl_default_done, 1102 .policy = ethnl_pse_get_policy, 1103 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, 1104 }, 1105 { 1106 .cmd = ETHTOOL_MSG_PSE_SET, 1107 .flags = GENL_UNS_ADMIN_PERM, 1108 .doit = ethnl_default_set_doit, 1109 .policy = ethnl_pse_set_policy, 1110 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1, 1111 }, 1112 { 1113 .cmd = ETHTOOL_MSG_RSS_GET, 1114 .doit = ethnl_default_doit, 1115 .policy = ethnl_rss_get_policy, 1116 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1, 1117 }, 1118 { 1119 .cmd = ETHTOOL_MSG_PLCA_GET_CFG, 1120 .doit = ethnl_default_doit, 1121 .start = ethnl_default_start, 1122 .dumpit = ethnl_default_dumpit, 1123 .done = ethnl_default_done, 1124 .policy = ethnl_plca_get_cfg_policy, 1125 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1, 1126 }, 1127 { 1128 .cmd = ETHTOOL_MSG_PLCA_SET_CFG, 1129 .flags = GENL_UNS_ADMIN_PERM, 1130 .doit = ethnl_default_set_doit, 1131 .policy = ethnl_plca_set_cfg_policy, 1132 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1, 1133 }, 1134 { 1135 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS, 1136 .doit = ethnl_default_doit, 1137 .start = ethnl_default_start, 1138 .dumpit = ethnl_default_dumpit, 1139 .done = ethnl_default_done, 1140 .policy = ethnl_plca_get_status_policy, 1141 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1, 1142 }, 1143 { 1144 .cmd = ETHTOOL_MSG_MM_GET, 1145 .doit = ethnl_default_doit, 1146 .start = ethnl_default_start, 1147 .dumpit = ethnl_default_dumpit, 1148 .done = ethnl_default_done, 1149 .policy = ethnl_mm_get_policy, 1150 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1, 1151 }, 1152 { 1153 .cmd = ETHTOOL_MSG_MM_SET, 1154 .flags = GENL_UNS_ADMIN_PERM, 1155 .doit = ethnl_default_set_doit, 1156 .policy = ethnl_mm_set_policy, 1157 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, 1158 }, 1159 }; 1160 1161 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 1162 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 1163 }; 1164 1165 static struct genl_family ethtool_genl_family __ro_after_init = { 1166 .name = ETHTOOL_GENL_NAME, 1167 .version = ETHTOOL_GENL_VERSION, 1168 .netnsok = true, 1169 .parallel_ops = true, 1170 .ops = ethtool_genl_ops, 1171 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 1172 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1, 1173 .mcgrps = ethtool_nl_mcgrps, 1174 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 1175 }; 1176 1177 /* module setup */ 1178 1179 static int __init ethnl_init(void) 1180 { 1181 int ret; 1182 1183 ret = genl_register_family(ðtool_genl_family); 1184 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 1185 return ret; 1186 ethnl_ok = true; 1187 1188 ret = register_netdevice_notifier(ðnl_netdev_notifier); 1189 WARN(ret < 0, "ethtool: net device notifier registration failed"); 1190 return ret; 1191 } 1192 1193 subsys_initcall(ethnl_init); 1194