1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include <net/sock.h> 4 #include <linux/ethtool_netlink.h> 5 #include "netlink.h" 6 7 static struct genl_family ethtool_genl_family; 8 9 static bool ethnl_ok __read_mostly; 10 static u32 ethnl_bcast_seq; 11 12 static const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_MAX + 1] = { 13 [ETHTOOL_A_HEADER_UNSPEC] = { .type = NLA_REJECT }, 14 [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 }, 15 [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING, 16 .len = ALTIFNAMSIZ - 1 }, 17 [ETHTOOL_A_HEADER_FLAGS] = { .type = NLA_U32 }, 18 }; 19 20 /** 21 * ethnl_parse_header_dev_get() - parse request header 22 * @req_info: structure to put results into 23 * @header: nest attribute with request header 24 * @net: request netns 25 * @extack: netlink extack for error reporting 26 * @require_dev: fail if no device identified in header 27 * 28 * Parse request header in nested attribute @nest and puts results into 29 * the structure pointed to by @req_info. Extack from @info is used for error 30 * reporting. If req_info->dev is not null on return, reference to it has 31 * been taken. If error is returned, *req_info is null initialized and no 32 * reference is held. 33 * 34 * Return: 0 on success or negative error code 35 */ 36 int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info, 37 const struct nlattr *header, struct net *net, 38 struct netlink_ext_ack *extack, bool require_dev) 39 { 40 struct nlattr *tb[ETHTOOL_A_HEADER_MAX + 1]; 41 const struct nlattr *devname_attr; 42 struct net_device *dev = NULL; 43 int ret; 44 45 if (!header) { 46 NL_SET_ERR_MSG(extack, "request header missing"); 47 return -EINVAL; 48 } 49 ret = nla_parse_nested(tb, ETHTOOL_A_HEADER_MAX, header, 50 ethnl_header_policy, extack); 51 if (ret < 0) 52 return ret; 53 devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME]; 54 55 if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) { 56 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]); 57 58 dev = dev_get_by_index(net, ifindex); 59 if (!dev) { 60 NL_SET_ERR_MSG_ATTR(extack, 61 tb[ETHTOOL_A_HEADER_DEV_INDEX], 62 "no device matches ifindex"); 63 return -ENODEV; 64 } 65 /* if both ifindex and ifname are passed, they must match */ 66 if (devname_attr && 67 strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) { 68 dev_put(dev); 69 NL_SET_ERR_MSG_ATTR(extack, header, 70 "ifindex and name do not match"); 71 return -ENODEV; 72 } 73 } else if (devname_attr) { 74 dev = dev_get_by_name(net, nla_data(devname_attr)); 75 if (!dev) { 76 NL_SET_ERR_MSG_ATTR(extack, devname_attr, 77 "no device matches name"); 78 return -ENODEV; 79 } 80 } else if (require_dev) { 81 NL_SET_ERR_MSG_ATTR(extack, header, 82 "neither ifindex nor name specified"); 83 return -EINVAL; 84 } 85 86 if (dev && !netif_device_present(dev)) { 87 dev_put(dev); 88 NL_SET_ERR_MSG(extack, "device not present"); 89 return -ENODEV; 90 } 91 92 req_info->dev = dev; 93 if (tb[ETHTOOL_A_HEADER_FLAGS]) 94 req_info->flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]); 95 96 return 0; 97 } 98 99 /** 100 * ethnl_fill_reply_header() - Put common header into a reply message 101 * @skb: skb with the message 102 * @dev: network device to describe in header 103 * @attrtype: attribute type to use for the nest 104 * 105 * Create a nested attribute with attributes describing given network device. 106 * 107 * Return: 0 on success, error value (-EMSGSIZE only) on error 108 */ 109 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev, 110 u16 attrtype) 111 { 112 struct nlattr *nest; 113 114 if (!dev) 115 return 0; 116 nest = nla_nest_start(skb, attrtype); 117 if (!nest) 118 return -EMSGSIZE; 119 120 if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) || 121 nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name)) 122 goto nla_put_failure; 123 /* If more attributes are put into reply header, ethnl_header_size() 124 * must be updated to account for them. 125 */ 126 127 nla_nest_end(skb, nest); 128 return 0; 129 130 nla_put_failure: 131 nla_nest_cancel(skb, nest); 132 return -EMSGSIZE; 133 } 134 135 /** 136 * ethnl_reply_init() - Create skb for a reply and fill device identification 137 * @payload: payload length (without netlink and genetlink header) 138 * @dev: device the reply is about (may be null) 139 * @cmd: ETHTOOL_MSG_* message type for reply 140 * @hdr_attrtype: attribute type for common header 141 * @info: genetlink info of the received packet we respond to 142 * @ehdrp: place to store payload pointer returned by genlmsg_new() 143 * 144 * Return: pointer to allocated skb on success, NULL on error 145 */ 146 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd, 147 u16 hdr_attrtype, struct genl_info *info, 148 void **ehdrp) 149 { 150 struct sk_buff *skb; 151 152 skb = genlmsg_new(payload, GFP_KERNEL); 153 if (!skb) 154 goto err; 155 *ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd); 156 if (!*ehdrp) 157 goto err_free; 158 159 if (dev) { 160 int ret; 161 162 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype); 163 if (ret < 0) 164 goto err_free; 165 } 166 return skb; 167 168 err_free: 169 nlmsg_free(skb); 170 err: 171 if (info) 172 GENL_SET_ERR_MSG(info, "failed to setup reply message"); 173 return NULL; 174 } 175 176 static void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd) 177 { 178 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0, 179 cmd); 180 } 181 182 static int ethnl_multicast(struct sk_buff *skb, struct net_device *dev) 183 { 184 return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb, 185 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL); 186 } 187 188 /* GET request helpers */ 189 190 /** 191 * struct ethnl_dump_ctx - context structure for generic dumpit() callback 192 * @ops: request ops of currently processed message type 193 * @req_info: parsed request header of processed request 194 * @reply_data: data needed to compose the reply 195 * @pos_hash: saved iteration position - hashbucket 196 * @pos_idx: saved iteration position - index 197 * 198 * These parameters are kept in struct netlink_callback as context preserved 199 * between iterations. They are initialized by ethnl_default_start() and used 200 * in ethnl_default_dumpit() and ethnl_default_done(). 201 */ 202 struct ethnl_dump_ctx { 203 const struct ethnl_request_ops *ops; 204 struct ethnl_req_info *req_info; 205 struct ethnl_reply_data *reply_data; 206 int pos_hash; 207 int pos_idx; 208 }; 209 210 static const struct ethnl_request_ops * 211 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { 212 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, 213 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, 214 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops, 215 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops, 216 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops, 217 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops, 218 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops, 219 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops, 220 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, 221 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, 222 }; 223 224 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) 225 { 226 return (struct ethnl_dump_ctx *)cb->ctx; 227 } 228 229 /** 230 * ethnl_default_parse() - Parse request message 231 * @req_info: pointer to structure to put data into 232 * @nlhdr: pointer to request message header 233 * @net: request netns 234 * @request_ops: struct request_ops for request type 235 * @extack: netlink extack for error reporting 236 * @require_dev: fail if no device identified in header 237 * 238 * Parse universal request header and call request specific ->parse_request() 239 * callback (if defined) to parse the rest of the message. 240 * 241 * Return: 0 on success or negative error code 242 */ 243 static int ethnl_default_parse(struct ethnl_req_info *req_info, 244 const struct nlmsghdr *nlhdr, struct net *net, 245 const struct ethnl_request_ops *request_ops, 246 struct netlink_ext_ack *extack, bool require_dev) 247 { 248 struct nlattr **tb; 249 int ret; 250 251 tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]), 252 GFP_KERNEL); 253 if (!tb) 254 return -ENOMEM; 255 256 ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr, 257 request_ops->request_policy, extack); 258 if (ret < 0) 259 goto out; 260 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], 261 net, extack, require_dev); 262 if (ret < 0) 263 goto out; 264 265 if (request_ops->parse_request) { 266 ret = request_ops->parse_request(req_info, tb, extack); 267 if (ret < 0) 268 goto out; 269 } 270 271 ret = 0; 272 out: 273 kfree(tb); 274 return ret; 275 } 276 277 /** 278 * ethnl_init_reply_data() - Initialize reply data for GET request 279 * @reply_data: pointer to embedded struct ethnl_reply_data 280 * @ops: instance of struct ethnl_request_ops describing the layout 281 * @dev: network device to initialize the reply for 282 * 283 * Fills the reply data part with zeros and sets the dev member. Must be called 284 * before calling the ->fill_reply() callback (for each iteration when handling 285 * dump requests). 286 */ 287 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data, 288 const struct ethnl_request_ops *ops, 289 struct net_device *dev) 290 { 291 memset(reply_data, 0, ops->reply_data_size); 292 reply_data->dev = dev; 293 } 294 295 /* default ->doit() handler for GET type requests */ 296 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) 297 { 298 struct ethnl_reply_data *reply_data = NULL; 299 struct ethnl_req_info *req_info = NULL; 300 const u8 cmd = info->genlhdr->cmd; 301 const struct ethnl_request_ops *ops; 302 struct sk_buff *rskb; 303 void *reply_payload; 304 int reply_len; 305 int ret; 306 307 ops = ethnl_default_requests[cmd]; 308 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 309 return -EOPNOTSUPP; 310 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 311 if (!req_info) 312 return -ENOMEM; 313 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 314 if (!reply_data) { 315 kfree(req_info); 316 return -ENOMEM; 317 } 318 319 ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops, 320 info->extack, !ops->allow_nodev_do); 321 if (ret < 0) 322 goto err_dev; 323 ethnl_init_reply_data(reply_data, ops, req_info->dev); 324 325 rtnl_lock(); 326 ret = ops->prepare_data(req_info, reply_data, info); 327 rtnl_unlock(); 328 if (ret < 0) 329 goto err_cleanup; 330 ret = ops->reply_size(req_info, reply_data); 331 if (ret < 0) 332 goto err_cleanup; 333 reply_len = ret; 334 ret = -ENOMEM; 335 rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd, 336 ops->hdr_attr, info, &reply_payload); 337 if (!rskb) 338 goto err_cleanup; 339 ret = ops->fill_reply(rskb, req_info, reply_data); 340 if (ret < 0) 341 goto err_msg; 342 if (ops->cleanup_data) 343 ops->cleanup_data(reply_data); 344 345 genlmsg_end(rskb, reply_payload); 346 if (req_info->dev) 347 dev_put(req_info->dev); 348 kfree(reply_data); 349 kfree(req_info); 350 return genlmsg_reply(rskb, info); 351 352 err_msg: 353 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 354 nlmsg_free(rskb); 355 err_cleanup: 356 if (ops->cleanup_data) 357 ops->cleanup_data(reply_data); 358 err_dev: 359 if (req_info->dev) 360 dev_put(req_info->dev); 361 kfree(reply_data); 362 kfree(req_info); 363 return ret; 364 } 365 366 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, 367 const struct ethnl_dump_ctx *ctx) 368 { 369 int ret; 370 371 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); 372 rtnl_lock(); 373 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL); 374 rtnl_unlock(); 375 if (ret < 0) 376 goto out; 377 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); 378 if (ret < 0) 379 goto out; 380 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); 381 382 out: 383 if (ctx->ops->cleanup_data) 384 ctx->ops->cleanup_data(ctx->reply_data); 385 ctx->reply_data->dev = NULL; 386 return ret; 387 } 388 389 /* Default ->dumpit() handler for GET requests. Device iteration copied from 390 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable 391 * persistence as we cannot guarantee to hold RTNL lock through the whole 392 * function as rtnetnlink does. 393 */ 394 static int ethnl_default_dumpit(struct sk_buff *skb, 395 struct netlink_callback *cb) 396 { 397 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 398 struct net *net = sock_net(skb->sk); 399 int s_idx = ctx->pos_idx; 400 int h, idx = 0; 401 int ret = 0; 402 void *ehdr; 403 404 rtnl_lock(); 405 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 406 struct hlist_head *head; 407 struct net_device *dev; 408 unsigned int seq; 409 410 head = &net->dev_index_head[h]; 411 412 restart_chain: 413 seq = net->dev_base_seq; 414 cb->seq = seq; 415 idx = 0; 416 hlist_for_each_entry(dev, head, index_hlist) { 417 if (idx < s_idx) 418 goto cont; 419 dev_hold(dev); 420 rtnl_unlock(); 421 422 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, 423 cb->nlh->nlmsg_seq, 424 ðtool_genl_family, 0, 425 ctx->ops->reply_cmd); 426 if (!ehdr) { 427 dev_put(dev); 428 ret = -EMSGSIZE; 429 goto out; 430 } 431 ret = ethnl_default_dump_one(skb, dev, ctx); 432 dev_put(dev); 433 if (ret < 0) { 434 genlmsg_cancel(skb, ehdr); 435 if (ret == -EOPNOTSUPP) 436 goto lock_and_cont; 437 if (likely(skb->len)) 438 ret = skb->len; 439 goto out; 440 } 441 genlmsg_end(skb, ehdr); 442 lock_and_cont: 443 rtnl_lock(); 444 if (net->dev_base_seq != seq) { 445 s_idx = idx + 1; 446 goto restart_chain; 447 } 448 cont: 449 idx++; 450 } 451 452 } 453 rtnl_unlock(); 454 455 out: 456 ctx->pos_hash = h; 457 ctx->pos_idx = idx; 458 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 459 460 return ret; 461 } 462 463 /* generic ->start() handler for GET requests */ 464 static int ethnl_default_start(struct netlink_callback *cb) 465 { 466 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 467 struct ethnl_reply_data *reply_data; 468 const struct ethnl_request_ops *ops; 469 struct ethnl_req_info *req_info; 470 struct genlmsghdr *ghdr; 471 int ret; 472 473 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 474 475 ghdr = nlmsg_data(cb->nlh); 476 ops = ethnl_default_requests[ghdr->cmd]; 477 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 478 return -EOPNOTSUPP; 479 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 480 if (!req_info) 481 return -ENOMEM; 482 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 483 if (!reply_data) { 484 ret = -ENOMEM; 485 goto free_req_info; 486 } 487 488 ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops, 489 cb->extack, false); 490 if (req_info->dev) { 491 /* We ignore device specification in dump requests but as the 492 * same parser as for non-dump (doit) requests is used, it 493 * would take reference to the device if it finds one 494 */ 495 dev_put(req_info->dev); 496 req_info->dev = NULL; 497 } 498 if (ret < 0) 499 goto free_reply_data; 500 501 ctx->ops = ops; 502 ctx->req_info = req_info; 503 ctx->reply_data = reply_data; 504 ctx->pos_hash = 0; 505 ctx->pos_idx = 0; 506 507 return 0; 508 509 free_reply_data: 510 kfree(reply_data); 511 free_req_info: 512 kfree(req_info); 513 514 return ret; 515 } 516 517 /* default ->done() handler for GET requests */ 518 static int ethnl_default_done(struct netlink_callback *cb) 519 { 520 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 521 522 kfree(ctx->reply_data); 523 kfree(ctx->req_info); 524 525 return 0; 526 } 527 528 static const struct ethnl_request_ops * 529 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 530 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 531 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 532 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 533 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 534 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 535 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 536 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 537 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 538 }; 539 540 /* default notification handler */ 541 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 542 const void *data) 543 { 544 struct ethnl_reply_data *reply_data; 545 const struct ethnl_request_ops *ops; 546 struct ethnl_req_info *req_info; 547 struct sk_buff *skb; 548 void *reply_payload; 549 int reply_len; 550 int ret; 551 552 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 553 !ethnl_default_notify_ops[cmd], 554 "unexpected notification type %u\n", cmd)) 555 return; 556 ops = ethnl_default_notify_ops[cmd]; 557 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 558 if (!req_info) 559 return; 560 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 561 if (!reply_data) { 562 kfree(req_info); 563 return; 564 } 565 566 req_info->dev = dev; 567 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 568 569 ethnl_init_reply_data(reply_data, ops, dev); 570 ret = ops->prepare_data(req_info, reply_data, NULL); 571 if (ret < 0) 572 goto err_cleanup; 573 ret = ops->reply_size(req_info, reply_data); 574 if (ret < 0) 575 goto err_cleanup; 576 reply_len = ret; 577 ret = -ENOMEM; 578 skb = genlmsg_new(reply_len, GFP_KERNEL); 579 if (!skb) 580 goto err_cleanup; 581 reply_payload = ethnl_bcastmsg_put(skb, cmd); 582 if (!reply_payload) 583 goto err_skb; 584 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 585 if (ret < 0) 586 goto err_msg; 587 ret = ops->fill_reply(skb, req_info, reply_data); 588 if (ret < 0) 589 goto err_msg; 590 if (ops->cleanup_data) 591 ops->cleanup_data(reply_data); 592 593 genlmsg_end(skb, reply_payload); 594 kfree(reply_data); 595 kfree(req_info); 596 ethnl_multicast(skb, dev); 597 return; 598 599 err_msg: 600 WARN_ONCE(ret == -EMSGSIZE, 601 "calculated message payload length (%d) not sufficient\n", 602 reply_len); 603 err_skb: 604 nlmsg_free(skb); 605 err_cleanup: 606 if (ops->cleanup_data) 607 ops->cleanup_data(reply_data); 608 kfree(reply_data); 609 kfree(req_info); 610 return; 611 } 612 613 /* notifications */ 614 615 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 616 const void *data); 617 618 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 619 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 620 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 621 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 622 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 623 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 624 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 625 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 626 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 627 }; 628 629 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 630 { 631 if (unlikely(!ethnl_ok)) 632 return; 633 ASSERT_RTNL(); 634 635 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 636 ethnl_notify_handlers[cmd])) 637 ethnl_notify_handlers[cmd](dev, cmd, data); 638 else 639 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 640 cmd, netdev_name(dev)); 641 } 642 EXPORT_SYMBOL(ethtool_notify); 643 644 static void ethnl_notify_features(struct netdev_notifier_info *info) 645 { 646 struct net_device *dev = netdev_notifier_info_to_dev(info); 647 648 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 649 } 650 651 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 652 void *ptr) 653 { 654 switch (event) { 655 case NETDEV_FEAT_CHANGE: 656 ethnl_notify_features(ptr); 657 break; 658 } 659 660 return NOTIFY_DONE; 661 } 662 663 static struct notifier_block ethnl_netdev_notifier = { 664 .notifier_call = ethnl_netdev_event, 665 }; 666 667 /* genetlink setup */ 668 669 static const struct genl_ops ethtool_genl_ops[] = { 670 { 671 .cmd = ETHTOOL_MSG_STRSET_GET, 672 .doit = ethnl_default_doit, 673 .start = ethnl_default_start, 674 .dumpit = ethnl_default_dumpit, 675 .done = ethnl_default_done, 676 }, 677 { 678 .cmd = ETHTOOL_MSG_LINKINFO_GET, 679 .doit = ethnl_default_doit, 680 .start = ethnl_default_start, 681 .dumpit = ethnl_default_dumpit, 682 .done = ethnl_default_done, 683 }, 684 { 685 .cmd = ETHTOOL_MSG_LINKINFO_SET, 686 .flags = GENL_UNS_ADMIN_PERM, 687 .doit = ethnl_set_linkinfo, 688 }, 689 { 690 .cmd = ETHTOOL_MSG_LINKMODES_GET, 691 .doit = ethnl_default_doit, 692 .start = ethnl_default_start, 693 .dumpit = ethnl_default_dumpit, 694 .done = ethnl_default_done, 695 }, 696 { 697 .cmd = ETHTOOL_MSG_LINKMODES_SET, 698 .flags = GENL_UNS_ADMIN_PERM, 699 .doit = ethnl_set_linkmodes, 700 }, 701 { 702 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 703 .doit = ethnl_default_doit, 704 .start = ethnl_default_start, 705 .dumpit = ethnl_default_dumpit, 706 .done = ethnl_default_done, 707 }, 708 { 709 .cmd = ETHTOOL_MSG_DEBUG_GET, 710 .doit = ethnl_default_doit, 711 .start = ethnl_default_start, 712 .dumpit = ethnl_default_dumpit, 713 .done = ethnl_default_done, 714 }, 715 { 716 .cmd = ETHTOOL_MSG_DEBUG_SET, 717 .flags = GENL_UNS_ADMIN_PERM, 718 .doit = ethnl_set_debug, 719 }, 720 { 721 .cmd = ETHTOOL_MSG_WOL_GET, 722 .flags = GENL_UNS_ADMIN_PERM, 723 .doit = ethnl_default_doit, 724 .start = ethnl_default_start, 725 .dumpit = ethnl_default_dumpit, 726 .done = ethnl_default_done, 727 }, 728 { 729 .cmd = ETHTOOL_MSG_WOL_SET, 730 .flags = GENL_UNS_ADMIN_PERM, 731 .doit = ethnl_set_wol, 732 }, 733 { 734 .cmd = ETHTOOL_MSG_FEATURES_GET, 735 .doit = ethnl_default_doit, 736 .start = ethnl_default_start, 737 .dumpit = ethnl_default_dumpit, 738 .done = ethnl_default_done, 739 }, 740 { 741 .cmd = ETHTOOL_MSG_FEATURES_SET, 742 .flags = GENL_UNS_ADMIN_PERM, 743 .doit = ethnl_set_features, 744 }, 745 { 746 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 747 .doit = ethnl_default_doit, 748 .start = ethnl_default_start, 749 .dumpit = ethnl_default_dumpit, 750 .done = ethnl_default_done, 751 }, 752 { 753 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 754 .flags = GENL_UNS_ADMIN_PERM, 755 .doit = ethnl_set_privflags, 756 }, 757 { 758 .cmd = ETHTOOL_MSG_RINGS_GET, 759 .doit = ethnl_default_doit, 760 .start = ethnl_default_start, 761 .dumpit = ethnl_default_dumpit, 762 .done = ethnl_default_done, 763 }, 764 { 765 .cmd = ETHTOOL_MSG_RINGS_SET, 766 .flags = GENL_UNS_ADMIN_PERM, 767 .doit = ethnl_set_rings, 768 }, 769 { 770 .cmd = ETHTOOL_MSG_CHANNELS_GET, 771 .doit = ethnl_default_doit, 772 .start = ethnl_default_start, 773 .dumpit = ethnl_default_dumpit, 774 .done = ethnl_default_done, 775 }, 776 { 777 .cmd = ETHTOOL_MSG_CHANNELS_SET, 778 .flags = GENL_UNS_ADMIN_PERM, 779 .doit = ethnl_set_channels, 780 }, 781 }; 782 783 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 784 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 785 }; 786 787 static struct genl_family ethtool_genl_family = { 788 .name = ETHTOOL_GENL_NAME, 789 .version = ETHTOOL_GENL_VERSION, 790 .netnsok = true, 791 .parallel_ops = true, 792 .ops = ethtool_genl_ops, 793 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 794 .mcgrps = ethtool_nl_mcgrps, 795 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 796 }; 797 798 /* module setup */ 799 800 static int __init ethnl_init(void) 801 { 802 int ret; 803 804 ret = genl_register_family(ðtool_genl_family); 805 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 806 return ret; 807 ethnl_ok = true; 808 809 ret = register_netdevice_notifier(ðnl_netdev_notifier); 810 WARN(ret < 0, "ethtool: net device notifier registration failed"); 811 return ret; 812 } 813 814 subsys_initcall(ethnl_init); 815