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_hash: saved iteration position - hashbucket 256 * @pos_idx: saved iteration position - index 257 * 258 * These parameters are kept in struct netlink_callback as context preserved 259 * between iterations. They are initialized by ethnl_default_start() and used 260 * in ethnl_default_dumpit() and ethnl_default_done(). 261 */ 262 struct ethnl_dump_ctx { 263 const struct ethnl_request_ops *ops; 264 struct ethnl_req_info *req_info; 265 struct ethnl_reply_data *reply_data; 266 int pos_hash; 267 int pos_idx; 268 }; 269 270 static const struct ethnl_request_ops * 271 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { 272 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, 273 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, 274 [ETHTOOL_MSG_LINKINFO_SET] = ðnl_linkinfo_request_ops, 275 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops, 276 [ETHTOOL_MSG_LINKMODES_SET] = ðnl_linkmodes_request_ops, 277 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops, 278 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops, 279 [ETHTOOL_MSG_DEBUG_SET] = ðnl_debug_request_ops, 280 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops, 281 [ETHTOOL_MSG_WOL_SET] = ðnl_wol_request_ops, 282 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops, 283 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops, 284 [ETHTOOL_MSG_PRIVFLAGS_SET] = ðnl_privflags_request_ops, 285 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, 286 [ETHTOOL_MSG_RINGS_SET] = ðnl_rings_request_ops, 287 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, 288 [ETHTOOL_MSG_CHANNELS_SET] = ðnl_channels_request_ops, 289 [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops, 290 [ETHTOOL_MSG_COALESCE_SET] = ðnl_coalesce_request_ops, 291 [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, 292 [ETHTOOL_MSG_PAUSE_SET] = ðnl_pause_request_ops, 293 [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops, 294 [ETHTOOL_MSG_EEE_SET] = ðnl_eee_request_ops, 295 [ETHTOOL_MSG_FEC_GET] = ðnl_fec_request_ops, 296 [ETHTOOL_MSG_FEC_SET] = ðnl_fec_request_ops, 297 [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops, 298 [ETHTOOL_MSG_MODULE_EEPROM_GET] = ðnl_module_eeprom_request_ops, 299 [ETHTOOL_MSG_STATS_GET] = ðnl_stats_request_ops, 300 [ETHTOOL_MSG_PHC_VCLOCKS_GET] = ðnl_phc_vclocks_request_ops, 301 [ETHTOOL_MSG_MODULE_GET] = ðnl_module_request_ops, 302 [ETHTOOL_MSG_MODULE_SET] = ðnl_module_request_ops, 303 [ETHTOOL_MSG_PSE_GET] = ðnl_pse_request_ops, 304 [ETHTOOL_MSG_PSE_SET] = ðnl_pse_request_ops, 305 [ETHTOOL_MSG_RSS_GET] = ðnl_rss_request_ops, 306 [ETHTOOL_MSG_PLCA_GET_CFG] = ðnl_plca_cfg_request_ops, 307 [ETHTOOL_MSG_PLCA_SET_CFG] = ðnl_plca_cfg_request_ops, 308 [ETHTOOL_MSG_PLCA_GET_STATUS] = ðnl_plca_status_request_ops, 309 [ETHTOOL_MSG_MM_GET] = ðnl_mm_request_ops, 310 [ETHTOOL_MSG_MM_SET] = ðnl_mm_request_ops, 311 }; 312 313 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) 314 { 315 return (struct ethnl_dump_ctx *)cb->ctx; 316 } 317 318 /** 319 * ethnl_default_parse() - Parse request message 320 * @req_info: pointer to structure to put data into 321 * @tb: parsed attributes 322 * @net: request netns 323 * @request_ops: struct request_ops for request type 324 * @extack: netlink extack for error reporting 325 * @require_dev: fail if no device identified in header 326 * 327 * Parse universal request header and call request specific ->parse_request() 328 * callback (if defined) to parse the rest of the message. 329 * 330 * Return: 0 on success or negative error code 331 */ 332 static int ethnl_default_parse(struct ethnl_req_info *req_info, 333 struct nlattr **tb, struct net *net, 334 const struct ethnl_request_ops *request_ops, 335 struct netlink_ext_ack *extack, bool require_dev) 336 { 337 int ret; 338 339 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], 340 net, extack, require_dev); 341 if (ret < 0) 342 return ret; 343 344 if (request_ops->parse_request) { 345 ret = request_ops->parse_request(req_info, tb, extack); 346 if (ret < 0) 347 return ret; 348 } 349 350 return 0; 351 } 352 353 /** 354 * ethnl_init_reply_data() - Initialize reply data for GET request 355 * @reply_data: pointer to embedded struct ethnl_reply_data 356 * @ops: instance of struct ethnl_request_ops describing the layout 357 * @dev: network device to initialize the reply for 358 * 359 * Fills the reply data part with zeros and sets the dev member. Must be called 360 * before calling the ->fill_reply() callback (for each iteration when handling 361 * dump requests). 362 */ 363 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data, 364 const struct ethnl_request_ops *ops, 365 struct net_device *dev) 366 { 367 memset(reply_data, 0, ops->reply_data_size); 368 reply_data->dev = dev; 369 } 370 371 /* default ->doit() handler for GET type requests */ 372 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) 373 { 374 struct ethnl_reply_data *reply_data = NULL; 375 struct ethnl_req_info *req_info = NULL; 376 const u8 cmd = info->genlhdr->cmd; 377 const struct ethnl_request_ops *ops; 378 int hdr_len, reply_len; 379 struct sk_buff *rskb; 380 void *reply_payload; 381 int ret; 382 383 ops = ethnl_default_requests[cmd]; 384 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 385 return -EOPNOTSUPP; 386 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 387 return -EINVAL; 388 389 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 390 if (!req_info) 391 return -ENOMEM; 392 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 393 if (!reply_data) { 394 kfree(req_info); 395 return -ENOMEM; 396 } 397 398 ret = ethnl_default_parse(req_info, info->attrs, genl_info_net(info), 399 ops, info->extack, !ops->allow_nodev_do); 400 if (ret < 0) 401 goto err_dev; 402 ethnl_init_reply_data(reply_data, ops, req_info->dev); 403 404 rtnl_lock(); 405 ret = ops->prepare_data(req_info, reply_data, info); 406 rtnl_unlock(); 407 if (ret < 0) 408 goto err_cleanup; 409 ret = ops->reply_size(req_info, reply_data); 410 if (ret < 0) 411 goto err_cleanup; 412 reply_len = ret; 413 ret = -ENOMEM; 414 rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(), 415 req_info->dev, ops->reply_cmd, 416 ops->hdr_attr, info, &reply_payload); 417 if (!rskb) 418 goto err_cleanup; 419 hdr_len = rskb->len; 420 ret = ops->fill_reply(rskb, req_info, reply_data); 421 if (ret < 0) 422 goto err_msg; 423 WARN_ONCE(rskb->len - hdr_len > reply_len, 424 "ethnl cmd %d: calculated reply length %d, but consumed %d\n", 425 cmd, reply_len, rskb->len - hdr_len); 426 if (ops->cleanup_data) 427 ops->cleanup_data(reply_data); 428 429 genlmsg_end(rskb, reply_payload); 430 netdev_put(req_info->dev, &req_info->dev_tracker); 431 kfree(reply_data); 432 kfree(req_info); 433 return genlmsg_reply(rskb, info); 434 435 err_msg: 436 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 437 nlmsg_free(rskb); 438 err_cleanup: 439 if (ops->cleanup_data) 440 ops->cleanup_data(reply_data); 441 err_dev: 442 netdev_put(req_info->dev, &req_info->dev_tracker); 443 kfree(reply_data); 444 kfree(req_info); 445 return ret; 446 } 447 448 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, 449 const struct ethnl_dump_ctx *ctx, 450 struct netlink_callback *cb) 451 { 452 void *ehdr; 453 int ret; 454 455 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 456 ðtool_genl_family, NLM_F_MULTI, 457 ctx->ops->reply_cmd); 458 if (!ehdr) 459 return -EMSGSIZE; 460 461 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); 462 rtnl_lock(); 463 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL); 464 rtnl_unlock(); 465 if (ret < 0) 466 goto out; 467 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); 468 if (ret < 0) 469 goto out; 470 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); 471 472 out: 473 if (ctx->ops->cleanup_data) 474 ctx->ops->cleanup_data(ctx->reply_data); 475 ctx->reply_data->dev = NULL; 476 if (ret < 0) 477 genlmsg_cancel(skb, ehdr); 478 else 479 genlmsg_end(skb, ehdr); 480 return ret; 481 } 482 483 /* Default ->dumpit() handler for GET requests. Device iteration copied from 484 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable 485 * persistence as we cannot guarantee to hold RTNL lock through the whole 486 * function as rtnetnlink does. 487 */ 488 static int ethnl_default_dumpit(struct sk_buff *skb, 489 struct netlink_callback *cb) 490 { 491 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 492 struct net *net = sock_net(skb->sk); 493 int s_idx = ctx->pos_idx; 494 int h, idx = 0; 495 int ret = 0; 496 497 rtnl_lock(); 498 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 499 struct hlist_head *head; 500 struct net_device *dev; 501 unsigned int seq; 502 503 head = &net->dev_index_head[h]; 504 505 restart_chain: 506 seq = net->dev_base_seq; 507 cb->seq = seq; 508 idx = 0; 509 hlist_for_each_entry(dev, head, index_hlist) { 510 if (idx < s_idx) 511 goto cont; 512 dev_hold(dev); 513 rtnl_unlock(); 514 515 ret = ethnl_default_dump_one(skb, dev, ctx, cb); 516 dev_put(dev); 517 if (ret < 0) { 518 if (ret == -EOPNOTSUPP) 519 goto lock_and_cont; 520 if (likely(skb->len)) 521 ret = skb->len; 522 goto out; 523 } 524 lock_and_cont: 525 rtnl_lock(); 526 if (net->dev_base_seq != seq) { 527 s_idx = idx + 1; 528 goto restart_chain; 529 } 530 cont: 531 idx++; 532 } 533 534 } 535 rtnl_unlock(); 536 537 out: 538 ctx->pos_hash = h; 539 ctx->pos_idx = idx; 540 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 541 542 return ret; 543 } 544 545 /* generic ->start() handler for GET requests */ 546 static int ethnl_default_start(struct netlink_callback *cb) 547 { 548 const struct genl_dumpit_info *info = genl_dumpit_info(cb); 549 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 550 struct ethnl_reply_data *reply_data; 551 const struct ethnl_request_ops *ops; 552 struct ethnl_req_info *req_info; 553 struct genlmsghdr *ghdr; 554 int ret; 555 556 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 557 558 ghdr = nlmsg_data(cb->nlh); 559 ops = ethnl_default_requests[ghdr->cmd]; 560 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 561 return -EOPNOTSUPP; 562 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 563 if (!req_info) 564 return -ENOMEM; 565 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 566 if (!reply_data) { 567 ret = -ENOMEM; 568 goto free_req_info; 569 } 570 571 ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk), 572 ops, cb->extack, false); 573 if (req_info->dev) { 574 /* We ignore device specification in dump requests but as the 575 * same parser as for non-dump (doit) requests is used, it 576 * would take reference to the device if it finds one 577 */ 578 netdev_put(req_info->dev, &req_info->dev_tracker); 579 req_info->dev = NULL; 580 } 581 if (ret < 0) 582 goto free_reply_data; 583 584 ctx->ops = ops; 585 ctx->req_info = req_info; 586 ctx->reply_data = reply_data; 587 ctx->pos_hash = 0; 588 ctx->pos_idx = 0; 589 590 return 0; 591 592 free_reply_data: 593 kfree(reply_data); 594 free_req_info: 595 kfree(req_info); 596 597 return ret; 598 } 599 600 /* default ->done() handler for GET requests */ 601 static int ethnl_default_done(struct netlink_callback *cb) 602 { 603 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 604 605 kfree(ctx->reply_data); 606 kfree(ctx->req_info); 607 608 return 0; 609 } 610 611 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info) 612 { 613 const struct ethnl_request_ops *ops; 614 struct ethnl_req_info req_info = {}; 615 const u8 cmd = info->genlhdr->cmd; 616 int ret; 617 618 ops = ethnl_default_requests[cmd]; 619 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 620 return -EOPNOTSUPP; 621 if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr)) 622 return -EINVAL; 623 624 ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr], 625 genl_info_net(info), info->extack, 626 true); 627 if (ret < 0) 628 return ret; 629 630 if (ops->set_validate) { 631 ret = ops->set_validate(&req_info, info); 632 /* 0 means nothing to do */ 633 if (ret <= 0) 634 goto out_dev; 635 } 636 637 rtnl_lock(); 638 ret = ethnl_ops_begin(req_info.dev); 639 if (ret < 0) 640 goto out_rtnl; 641 642 ret = ops->set(&req_info, info); 643 if (ret <= 0) 644 goto out_ops; 645 ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL); 646 647 ret = 0; 648 out_ops: 649 ethnl_ops_complete(req_info.dev); 650 out_rtnl: 651 rtnl_unlock(); 652 out_dev: 653 ethnl_parse_header_dev_put(&req_info); 654 return ret; 655 } 656 657 static const struct ethnl_request_ops * 658 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 659 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 660 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 661 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 662 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 663 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 664 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 665 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 666 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 667 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 668 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 669 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 670 [ETHTOOL_MSG_FEC_NTF] = ðnl_fec_request_ops, 671 [ETHTOOL_MSG_MODULE_NTF] = ðnl_module_request_ops, 672 [ETHTOOL_MSG_PLCA_NTF] = ðnl_plca_cfg_request_ops, 673 [ETHTOOL_MSG_MM_NTF] = ðnl_mm_request_ops, 674 }; 675 676 /* default notification handler */ 677 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 678 const void *data) 679 { 680 struct ethnl_reply_data *reply_data; 681 const struct ethnl_request_ops *ops; 682 struct ethnl_req_info *req_info; 683 struct sk_buff *skb; 684 void *reply_payload; 685 int reply_len; 686 int ret; 687 688 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 689 !ethnl_default_notify_ops[cmd], 690 "unexpected notification type %u\n", cmd)) 691 return; 692 ops = ethnl_default_notify_ops[cmd]; 693 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 694 if (!req_info) 695 return; 696 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 697 if (!reply_data) { 698 kfree(req_info); 699 return; 700 } 701 702 req_info->dev = dev; 703 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 704 705 ethnl_init_reply_data(reply_data, ops, dev); 706 ret = ops->prepare_data(req_info, reply_data, NULL); 707 if (ret < 0) 708 goto err_cleanup; 709 ret = ops->reply_size(req_info, reply_data); 710 if (ret < 0) 711 goto err_cleanup; 712 reply_len = ret + ethnl_reply_header_size(); 713 skb = genlmsg_new(reply_len, GFP_KERNEL); 714 if (!skb) 715 goto err_cleanup; 716 reply_payload = ethnl_bcastmsg_put(skb, cmd); 717 if (!reply_payload) 718 goto err_skb; 719 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 720 if (ret < 0) 721 goto err_msg; 722 ret = ops->fill_reply(skb, req_info, reply_data); 723 if (ret < 0) 724 goto err_msg; 725 if (ops->cleanup_data) 726 ops->cleanup_data(reply_data); 727 728 genlmsg_end(skb, reply_payload); 729 kfree(reply_data); 730 kfree(req_info); 731 ethnl_multicast(skb, dev); 732 return; 733 734 err_msg: 735 WARN_ONCE(ret == -EMSGSIZE, 736 "calculated message payload length (%d) not sufficient\n", 737 reply_len); 738 err_skb: 739 nlmsg_free(skb); 740 err_cleanup: 741 if (ops->cleanup_data) 742 ops->cleanup_data(reply_data); 743 kfree(reply_data); 744 kfree(req_info); 745 return; 746 } 747 748 /* notifications */ 749 750 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 751 const void *data); 752 753 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 754 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 755 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 756 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 757 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 758 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 759 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 760 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 761 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 762 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 763 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 764 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 765 [ETHTOOL_MSG_FEC_NTF] = ethnl_default_notify, 766 [ETHTOOL_MSG_MODULE_NTF] = ethnl_default_notify, 767 [ETHTOOL_MSG_PLCA_NTF] = ethnl_default_notify, 768 [ETHTOOL_MSG_MM_NTF] = ethnl_default_notify, 769 }; 770 771 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 772 { 773 if (unlikely(!ethnl_ok)) 774 return; 775 ASSERT_RTNL(); 776 777 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 778 ethnl_notify_handlers[cmd])) 779 ethnl_notify_handlers[cmd](dev, cmd, data); 780 else 781 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 782 cmd, netdev_name(dev)); 783 } 784 EXPORT_SYMBOL(ethtool_notify); 785 786 static void ethnl_notify_features(struct netdev_notifier_info *info) 787 { 788 struct net_device *dev = netdev_notifier_info_to_dev(info); 789 790 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 791 } 792 793 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 794 void *ptr) 795 { 796 switch (event) { 797 case NETDEV_FEAT_CHANGE: 798 ethnl_notify_features(ptr); 799 break; 800 } 801 802 return NOTIFY_DONE; 803 } 804 805 static struct notifier_block ethnl_netdev_notifier = { 806 .notifier_call = ethnl_netdev_event, 807 }; 808 809 /* genetlink setup */ 810 811 static const struct genl_ops ethtool_genl_ops[] = { 812 { 813 .cmd = ETHTOOL_MSG_STRSET_GET, 814 .doit = ethnl_default_doit, 815 .start = ethnl_default_start, 816 .dumpit = ethnl_default_dumpit, 817 .done = ethnl_default_done, 818 .policy = ethnl_strset_get_policy, 819 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1, 820 }, 821 { 822 .cmd = ETHTOOL_MSG_LINKINFO_GET, 823 .doit = ethnl_default_doit, 824 .start = ethnl_default_start, 825 .dumpit = ethnl_default_dumpit, 826 .done = ethnl_default_done, 827 .policy = ethnl_linkinfo_get_policy, 828 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1, 829 }, 830 { 831 .cmd = ETHTOOL_MSG_LINKINFO_SET, 832 .flags = GENL_UNS_ADMIN_PERM, 833 .doit = ethnl_default_set_doit, 834 .policy = ethnl_linkinfo_set_policy, 835 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1, 836 }, 837 { 838 .cmd = ETHTOOL_MSG_LINKMODES_GET, 839 .doit = ethnl_default_doit, 840 .start = ethnl_default_start, 841 .dumpit = ethnl_default_dumpit, 842 .done = ethnl_default_done, 843 .policy = ethnl_linkmodes_get_policy, 844 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1, 845 }, 846 { 847 .cmd = ETHTOOL_MSG_LINKMODES_SET, 848 .flags = GENL_UNS_ADMIN_PERM, 849 .doit = ethnl_default_set_doit, 850 .policy = ethnl_linkmodes_set_policy, 851 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1, 852 }, 853 { 854 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 855 .doit = ethnl_default_doit, 856 .start = ethnl_default_start, 857 .dumpit = ethnl_default_dumpit, 858 .done = ethnl_default_done, 859 .policy = ethnl_linkstate_get_policy, 860 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1, 861 }, 862 { 863 .cmd = ETHTOOL_MSG_DEBUG_GET, 864 .doit = ethnl_default_doit, 865 .start = ethnl_default_start, 866 .dumpit = ethnl_default_dumpit, 867 .done = ethnl_default_done, 868 .policy = ethnl_debug_get_policy, 869 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1, 870 }, 871 { 872 .cmd = ETHTOOL_MSG_DEBUG_SET, 873 .flags = GENL_UNS_ADMIN_PERM, 874 .doit = ethnl_default_set_doit, 875 .policy = ethnl_debug_set_policy, 876 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1, 877 }, 878 { 879 .cmd = ETHTOOL_MSG_WOL_GET, 880 .flags = GENL_UNS_ADMIN_PERM, 881 .doit = ethnl_default_doit, 882 .start = ethnl_default_start, 883 .dumpit = ethnl_default_dumpit, 884 .done = ethnl_default_done, 885 .policy = ethnl_wol_get_policy, 886 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1, 887 }, 888 { 889 .cmd = ETHTOOL_MSG_WOL_SET, 890 .flags = GENL_UNS_ADMIN_PERM, 891 .doit = ethnl_default_set_doit, 892 .policy = ethnl_wol_set_policy, 893 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1, 894 }, 895 { 896 .cmd = ETHTOOL_MSG_FEATURES_GET, 897 .doit = ethnl_default_doit, 898 .start = ethnl_default_start, 899 .dumpit = ethnl_default_dumpit, 900 .done = ethnl_default_done, 901 .policy = ethnl_features_get_policy, 902 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1, 903 }, 904 { 905 .cmd = ETHTOOL_MSG_FEATURES_SET, 906 .flags = GENL_UNS_ADMIN_PERM, 907 .doit = ethnl_set_features, 908 .policy = ethnl_features_set_policy, 909 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1, 910 }, 911 { 912 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 913 .doit = ethnl_default_doit, 914 .start = ethnl_default_start, 915 .dumpit = ethnl_default_dumpit, 916 .done = ethnl_default_done, 917 .policy = ethnl_privflags_get_policy, 918 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1, 919 }, 920 { 921 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 922 .flags = GENL_UNS_ADMIN_PERM, 923 .doit = ethnl_default_set_doit, 924 .policy = ethnl_privflags_set_policy, 925 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1, 926 }, 927 { 928 .cmd = ETHTOOL_MSG_RINGS_GET, 929 .doit = ethnl_default_doit, 930 .start = ethnl_default_start, 931 .dumpit = ethnl_default_dumpit, 932 .done = ethnl_default_done, 933 .policy = ethnl_rings_get_policy, 934 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1, 935 }, 936 { 937 .cmd = ETHTOOL_MSG_RINGS_SET, 938 .flags = GENL_UNS_ADMIN_PERM, 939 .doit = ethnl_default_set_doit, 940 .policy = ethnl_rings_set_policy, 941 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1, 942 }, 943 { 944 .cmd = ETHTOOL_MSG_CHANNELS_GET, 945 .doit = ethnl_default_doit, 946 .start = ethnl_default_start, 947 .dumpit = ethnl_default_dumpit, 948 .done = ethnl_default_done, 949 .policy = ethnl_channels_get_policy, 950 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1, 951 }, 952 { 953 .cmd = ETHTOOL_MSG_CHANNELS_SET, 954 .flags = GENL_UNS_ADMIN_PERM, 955 .doit = ethnl_default_set_doit, 956 .policy = ethnl_channels_set_policy, 957 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1, 958 }, 959 { 960 .cmd = ETHTOOL_MSG_COALESCE_GET, 961 .doit = ethnl_default_doit, 962 .start = ethnl_default_start, 963 .dumpit = ethnl_default_dumpit, 964 .done = ethnl_default_done, 965 .policy = ethnl_coalesce_get_policy, 966 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1, 967 }, 968 { 969 .cmd = ETHTOOL_MSG_COALESCE_SET, 970 .flags = GENL_UNS_ADMIN_PERM, 971 .doit = ethnl_default_set_doit, 972 .policy = ethnl_coalesce_set_policy, 973 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1, 974 }, 975 { 976 .cmd = ETHTOOL_MSG_PAUSE_GET, 977 .doit = ethnl_default_doit, 978 .start = ethnl_default_start, 979 .dumpit = ethnl_default_dumpit, 980 .done = ethnl_default_done, 981 .policy = ethnl_pause_get_policy, 982 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1, 983 }, 984 { 985 .cmd = ETHTOOL_MSG_PAUSE_SET, 986 .flags = GENL_UNS_ADMIN_PERM, 987 .doit = ethnl_default_set_doit, 988 .policy = ethnl_pause_set_policy, 989 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1, 990 }, 991 { 992 .cmd = ETHTOOL_MSG_EEE_GET, 993 .doit = ethnl_default_doit, 994 .start = ethnl_default_start, 995 .dumpit = ethnl_default_dumpit, 996 .done = ethnl_default_done, 997 .policy = ethnl_eee_get_policy, 998 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1, 999 }, 1000 { 1001 .cmd = ETHTOOL_MSG_EEE_SET, 1002 .flags = GENL_UNS_ADMIN_PERM, 1003 .doit = ethnl_default_set_doit, 1004 .policy = ethnl_eee_set_policy, 1005 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1, 1006 }, 1007 { 1008 .cmd = ETHTOOL_MSG_TSINFO_GET, 1009 .doit = ethnl_default_doit, 1010 .start = ethnl_default_start, 1011 .dumpit = ethnl_default_dumpit, 1012 .done = ethnl_default_done, 1013 .policy = ethnl_tsinfo_get_policy, 1014 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1, 1015 }, 1016 { 1017 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, 1018 .flags = GENL_UNS_ADMIN_PERM, 1019 .doit = ethnl_act_cable_test, 1020 .policy = ethnl_cable_test_act_policy, 1021 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1, 1022 }, 1023 { 1024 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, 1025 .flags = GENL_UNS_ADMIN_PERM, 1026 .doit = ethnl_act_cable_test_tdr, 1027 .policy = ethnl_cable_test_tdr_act_policy, 1028 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1, 1029 }, 1030 { 1031 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, 1032 .doit = ethnl_tunnel_info_doit, 1033 .start = ethnl_tunnel_info_start, 1034 .dumpit = ethnl_tunnel_info_dumpit, 1035 .policy = ethnl_tunnel_info_get_policy, 1036 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1, 1037 }, 1038 { 1039 .cmd = ETHTOOL_MSG_FEC_GET, 1040 .doit = ethnl_default_doit, 1041 .start = ethnl_default_start, 1042 .dumpit = ethnl_default_dumpit, 1043 .done = ethnl_default_done, 1044 .policy = ethnl_fec_get_policy, 1045 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1, 1046 }, 1047 { 1048 .cmd = ETHTOOL_MSG_FEC_SET, 1049 .flags = GENL_UNS_ADMIN_PERM, 1050 .doit = ethnl_default_set_doit, 1051 .policy = ethnl_fec_set_policy, 1052 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1, 1053 }, 1054 { 1055 .cmd = ETHTOOL_MSG_MODULE_EEPROM_GET, 1056 .flags = GENL_UNS_ADMIN_PERM, 1057 .doit = ethnl_default_doit, 1058 .start = ethnl_default_start, 1059 .dumpit = ethnl_default_dumpit, 1060 .done = ethnl_default_done, 1061 .policy = ethnl_module_eeprom_get_policy, 1062 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1, 1063 }, 1064 { 1065 .cmd = ETHTOOL_MSG_STATS_GET, 1066 .doit = ethnl_default_doit, 1067 .start = ethnl_default_start, 1068 .dumpit = ethnl_default_dumpit, 1069 .done = ethnl_default_done, 1070 .policy = ethnl_stats_get_policy, 1071 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1, 1072 }, 1073 { 1074 .cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET, 1075 .doit = ethnl_default_doit, 1076 .start = ethnl_default_start, 1077 .dumpit = ethnl_default_dumpit, 1078 .done = ethnl_default_done, 1079 .policy = ethnl_phc_vclocks_get_policy, 1080 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1, 1081 }, 1082 { 1083 .cmd = ETHTOOL_MSG_MODULE_GET, 1084 .doit = ethnl_default_doit, 1085 .start = ethnl_default_start, 1086 .dumpit = ethnl_default_dumpit, 1087 .done = ethnl_default_done, 1088 .policy = ethnl_module_get_policy, 1089 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1, 1090 }, 1091 { 1092 .cmd = ETHTOOL_MSG_MODULE_SET, 1093 .flags = GENL_UNS_ADMIN_PERM, 1094 .doit = ethnl_default_set_doit, 1095 .policy = ethnl_module_set_policy, 1096 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1, 1097 }, 1098 { 1099 .cmd = ETHTOOL_MSG_PSE_GET, 1100 .doit = ethnl_default_doit, 1101 .start = ethnl_default_start, 1102 .dumpit = ethnl_default_dumpit, 1103 .done = ethnl_default_done, 1104 .policy = ethnl_pse_get_policy, 1105 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1, 1106 }, 1107 { 1108 .cmd = ETHTOOL_MSG_PSE_SET, 1109 .flags = GENL_UNS_ADMIN_PERM, 1110 .doit = ethnl_default_set_doit, 1111 .policy = ethnl_pse_set_policy, 1112 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1, 1113 }, 1114 { 1115 .cmd = ETHTOOL_MSG_RSS_GET, 1116 .doit = ethnl_default_doit, 1117 .policy = ethnl_rss_get_policy, 1118 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1, 1119 }, 1120 { 1121 .cmd = ETHTOOL_MSG_PLCA_GET_CFG, 1122 .doit = ethnl_default_doit, 1123 .start = ethnl_default_start, 1124 .dumpit = ethnl_default_dumpit, 1125 .done = ethnl_default_done, 1126 .policy = ethnl_plca_get_cfg_policy, 1127 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1, 1128 }, 1129 { 1130 .cmd = ETHTOOL_MSG_PLCA_SET_CFG, 1131 .flags = GENL_UNS_ADMIN_PERM, 1132 .doit = ethnl_default_set_doit, 1133 .policy = ethnl_plca_set_cfg_policy, 1134 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1, 1135 }, 1136 { 1137 .cmd = ETHTOOL_MSG_PLCA_GET_STATUS, 1138 .doit = ethnl_default_doit, 1139 .start = ethnl_default_start, 1140 .dumpit = ethnl_default_dumpit, 1141 .done = ethnl_default_done, 1142 .policy = ethnl_plca_get_status_policy, 1143 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1, 1144 }, 1145 { 1146 .cmd = ETHTOOL_MSG_MM_GET, 1147 .doit = ethnl_default_doit, 1148 .start = ethnl_default_start, 1149 .dumpit = ethnl_default_dumpit, 1150 .done = ethnl_default_done, 1151 .policy = ethnl_mm_get_policy, 1152 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1, 1153 }, 1154 { 1155 .cmd = ETHTOOL_MSG_MM_SET, 1156 .flags = GENL_UNS_ADMIN_PERM, 1157 .doit = ethnl_default_set_doit, 1158 .policy = ethnl_mm_set_policy, 1159 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1, 1160 }, 1161 }; 1162 1163 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 1164 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 1165 }; 1166 1167 static struct genl_family ethtool_genl_family __ro_after_init = { 1168 .name = ETHTOOL_GENL_NAME, 1169 .version = ETHTOOL_GENL_VERSION, 1170 .netnsok = true, 1171 .parallel_ops = true, 1172 .ops = ethtool_genl_ops, 1173 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 1174 .resv_start_op = ETHTOOL_MSG_MODULE_GET + 1, 1175 .mcgrps = ethtool_nl_mcgrps, 1176 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 1177 }; 1178 1179 /* module setup */ 1180 1181 static int __init ethnl_init(void) 1182 { 1183 int ret; 1184 1185 ret = genl_register_family(ðtool_genl_family); 1186 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 1187 return ret; 1188 ethnl_ok = true; 1189 1190 ret = register_netdevice_notifier(ðnl_netdev_notifier); 1191 WARN(ret < 0, "ethtool: net device notifier registration failed"); 1192 return ret; 1193 } 1194 1195 subsys_initcall(ethnl_init); 1196