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 u32 flags = 0; 44 int ret; 45 46 if (!header) { 47 NL_SET_ERR_MSG(extack, "request header missing"); 48 return -EINVAL; 49 } 50 ret = nla_parse_nested(tb, ETHTOOL_A_HEADER_MAX, header, 51 ethnl_header_policy, extack); 52 if (ret < 0) 53 return ret; 54 if (tb[ETHTOOL_A_HEADER_FLAGS]) { 55 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]); 56 if (flags & ~ETHTOOL_FLAG_ALL) { 57 NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_HEADER_FLAGS], 58 "unrecognized request flags"); 59 nl_set_extack_cookie_u32(extack, ETHTOOL_FLAG_ALL); 60 return -EOPNOTSUPP; 61 } 62 } 63 64 devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME]; 65 if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) { 66 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]); 67 68 dev = dev_get_by_index(net, ifindex); 69 if (!dev) { 70 NL_SET_ERR_MSG_ATTR(extack, 71 tb[ETHTOOL_A_HEADER_DEV_INDEX], 72 "no device matches ifindex"); 73 return -ENODEV; 74 } 75 /* if both ifindex and ifname are passed, they must match */ 76 if (devname_attr && 77 strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) { 78 dev_put(dev); 79 NL_SET_ERR_MSG_ATTR(extack, header, 80 "ifindex and name do not match"); 81 return -ENODEV; 82 } 83 } else if (devname_attr) { 84 dev = dev_get_by_name(net, nla_data(devname_attr)); 85 if (!dev) { 86 NL_SET_ERR_MSG_ATTR(extack, devname_attr, 87 "no device matches name"); 88 return -ENODEV; 89 } 90 } else if (require_dev) { 91 NL_SET_ERR_MSG_ATTR(extack, header, 92 "neither ifindex nor name specified"); 93 return -EINVAL; 94 } 95 96 if (dev && !netif_device_present(dev)) { 97 dev_put(dev); 98 NL_SET_ERR_MSG(extack, "device not present"); 99 return -ENODEV; 100 } 101 102 req_info->dev = dev; 103 req_info->flags = flags; 104 return 0; 105 } 106 107 /** 108 * ethnl_fill_reply_header() - Put common header into a reply message 109 * @skb: skb with the message 110 * @dev: network device to describe in header 111 * @attrtype: attribute type to use for the nest 112 * 113 * Create a nested attribute with attributes describing given network device. 114 * 115 * Return: 0 on success, error value (-EMSGSIZE only) on error 116 */ 117 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev, 118 u16 attrtype) 119 { 120 struct nlattr *nest; 121 122 if (!dev) 123 return 0; 124 nest = nla_nest_start(skb, attrtype); 125 if (!nest) 126 return -EMSGSIZE; 127 128 if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) || 129 nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name)) 130 goto nla_put_failure; 131 /* If more attributes are put into reply header, ethnl_header_size() 132 * must be updated to account for them. 133 */ 134 135 nla_nest_end(skb, nest); 136 return 0; 137 138 nla_put_failure: 139 nla_nest_cancel(skb, nest); 140 return -EMSGSIZE; 141 } 142 143 /** 144 * ethnl_reply_init() - Create skb for a reply and fill device identification 145 * @payload: payload length (without netlink and genetlink header) 146 * @dev: device the reply is about (may be null) 147 * @cmd: ETHTOOL_MSG_* message type for reply 148 * @hdr_attrtype: attribute type for common header 149 * @info: genetlink info of the received packet we respond to 150 * @ehdrp: place to store payload pointer returned by genlmsg_new() 151 * 152 * Return: pointer to allocated skb on success, NULL on error 153 */ 154 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd, 155 u16 hdr_attrtype, struct genl_info *info, 156 void **ehdrp) 157 { 158 struct sk_buff *skb; 159 160 skb = genlmsg_new(payload, GFP_KERNEL); 161 if (!skb) 162 goto err; 163 *ehdrp = genlmsg_put_reply(skb, info, ðtool_genl_family, 0, cmd); 164 if (!*ehdrp) 165 goto err_free; 166 167 if (dev) { 168 int ret; 169 170 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype); 171 if (ret < 0) 172 goto err_free; 173 } 174 return skb; 175 176 err_free: 177 nlmsg_free(skb); 178 err: 179 if (info) 180 GENL_SET_ERR_MSG(info, "failed to setup reply message"); 181 return NULL; 182 } 183 184 static void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd) 185 { 186 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0, 187 cmd); 188 } 189 190 static int ethnl_multicast(struct sk_buff *skb, struct net_device *dev) 191 { 192 return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb, 193 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL); 194 } 195 196 /* GET request helpers */ 197 198 /** 199 * struct ethnl_dump_ctx - context structure for generic dumpit() callback 200 * @ops: request ops of currently processed message type 201 * @req_info: parsed request header of processed request 202 * @reply_data: data needed to compose the reply 203 * @pos_hash: saved iteration position - hashbucket 204 * @pos_idx: saved iteration position - index 205 * 206 * These parameters are kept in struct netlink_callback as context preserved 207 * between iterations. They are initialized by ethnl_default_start() and used 208 * in ethnl_default_dumpit() and ethnl_default_done(). 209 */ 210 struct ethnl_dump_ctx { 211 const struct ethnl_request_ops *ops; 212 struct ethnl_req_info *req_info; 213 struct ethnl_reply_data *reply_data; 214 int pos_hash; 215 int pos_idx; 216 }; 217 218 static const struct ethnl_request_ops * 219 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { 220 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, 221 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, 222 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops, 223 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops, 224 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops, 225 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops, 226 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops, 227 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops, 228 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, 229 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, 230 [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops, 231 [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, 232 [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops, 233 [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops, 234 }; 235 236 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) 237 { 238 return (struct ethnl_dump_ctx *)cb->ctx; 239 } 240 241 /** 242 * ethnl_default_parse() - Parse request message 243 * @req_info: pointer to structure to put data into 244 * @nlhdr: pointer to request message header 245 * @net: request netns 246 * @request_ops: struct request_ops for request type 247 * @extack: netlink extack for error reporting 248 * @require_dev: fail if no device identified in header 249 * 250 * Parse universal request header and call request specific ->parse_request() 251 * callback (if defined) to parse the rest of the message. 252 * 253 * Return: 0 on success or negative error code 254 */ 255 static int ethnl_default_parse(struct ethnl_req_info *req_info, 256 const struct nlmsghdr *nlhdr, struct net *net, 257 const struct ethnl_request_ops *request_ops, 258 struct netlink_ext_ack *extack, bool require_dev) 259 { 260 struct nlattr **tb; 261 int ret; 262 263 tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]), 264 GFP_KERNEL); 265 if (!tb) 266 return -ENOMEM; 267 268 ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr, 269 request_ops->request_policy, extack); 270 if (ret < 0) 271 goto out; 272 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], 273 net, extack, require_dev); 274 if (ret < 0) 275 goto out; 276 277 if (request_ops->parse_request) { 278 ret = request_ops->parse_request(req_info, tb, extack); 279 if (ret < 0) 280 goto out; 281 } 282 283 ret = 0; 284 out: 285 kfree(tb); 286 return ret; 287 } 288 289 /** 290 * ethnl_init_reply_data() - Initialize reply data for GET request 291 * @reply_data: pointer to embedded struct ethnl_reply_data 292 * @ops: instance of struct ethnl_request_ops describing the layout 293 * @dev: network device to initialize the reply for 294 * 295 * Fills the reply data part with zeros and sets the dev member. Must be called 296 * before calling the ->fill_reply() callback (for each iteration when handling 297 * dump requests). 298 */ 299 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data, 300 const struct ethnl_request_ops *ops, 301 struct net_device *dev) 302 { 303 memset(reply_data, 0, ops->reply_data_size); 304 reply_data->dev = dev; 305 } 306 307 /* default ->doit() handler for GET type requests */ 308 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) 309 { 310 struct ethnl_reply_data *reply_data = NULL; 311 struct ethnl_req_info *req_info = NULL; 312 const u8 cmd = info->genlhdr->cmd; 313 const struct ethnl_request_ops *ops; 314 struct sk_buff *rskb; 315 void *reply_payload; 316 int reply_len; 317 int ret; 318 319 ops = ethnl_default_requests[cmd]; 320 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 321 return -EOPNOTSUPP; 322 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 323 if (!req_info) 324 return -ENOMEM; 325 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 326 if (!reply_data) { 327 kfree(req_info); 328 return -ENOMEM; 329 } 330 331 ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops, 332 info->extack, !ops->allow_nodev_do); 333 if (ret < 0) 334 goto err_dev; 335 ethnl_init_reply_data(reply_data, ops, req_info->dev); 336 337 rtnl_lock(); 338 ret = ops->prepare_data(req_info, reply_data, info); 339 rtnl_unlock(); 340 if (ret < 0) 341 goto err_cleanup; 342 ret = ops->reply_size(req_info, reply_data); 343 if (ret < 0) 344 goto err_cleanup; 345 reply_len = ret; 346 ret = -ENOMEM; 347 rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd, 348 ops->hdr_attr, info, &reply_payload); 349 if (!rskb) 350 goto err_cleanup; 351 ret = ops->fill_reply(rskb, req_info, reply_data); 352 if (ret < 0) 353 goto err_msg; 354 if (ops->cleanup_data) 355 ops->cleanup_data(reply_data); 356 357 genlmsg_end(rskb, reply_payload); 358 if (req_info->dev) 359 dev_put(req_info->dev); 360 kfree(reply_data); 361 kfree(req_info); 362 return genlmsg_reply(rskb, info); 363 364 err_msg: 365 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 366 nlmsg_free(rskb); 367 err_cleanup: 368 if (ops->cleanup_data) 369 ops->cleanup_data(reply_data); 370 err_dev: 371 if (req_info->dev) 372 dev_put(req_info->dev); 373 kfree(reply_data); 374 kfree(req_info); 375 return ret; 376 } 377 378 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, 379 const struct ethnl_dump_ctx *ctx) 380 { 381 int ret; 382 383 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); 384 rtnl_lock(); 385 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL); 386 rtnl_unlock(); 387 if (ret < 0) 388 goto out; 389 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); 390 if (ret < 0) 391 goto out; 392 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); 393 394 out: 395 if (ctx->ops->cleanup_data) 396 ctx->ops->cleanup_data(ctx->reply_data); 397 ctx->reply_data->dev = NULL; 398 return ret; 399 } 400 401 /* Default ->dumpit() handler for GET requests. Device iteration copied from 402 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable 403 * persistence as we cannot guarantee to hold RTNL lock through the whole 404 * function as rtnetnlink does. 405 */ 406 static int ethnl_default_dumpit(struct sk_buff *skb, 407 struct netlink_callback *cb) 408 { 409 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 410 struct net *net = sock_net(skb->sk); 411 int s_idx = ctx->pos_idx; 412 int h, idx = 0; 413 int ret = 0; 414 void *ehdr; 415 416 rtnl_lock(); 417 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 418 struct hlist_head *head; 419 struct net_device *dev; 420 unsigned int seq; 421 422 head = &net->dev_index_head[h]; 423 424 restart_chain: 425 seq = net->dev_base_seq; 426 cb->seq = seq; 427 idx = 0; 428 hlist_for_each_entry(dev, head, index_hlist) { 429 if (idx < s_idx) 430 goto cont; 431 dev_hold(dev); 432 rtnl_unlock(); 433 434 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, 435 cb->nlh->nlmsg_seq, 436 ðtool_genl_family, 0, 437 ctx->ops->reply_cmd); 438 if (!ehdr) { 439 dev_put(dev); 440 ret = -EMSGSIZE; 441 goto out; 442 } 443 ret = ethnl_default_dump_one(skb, dev, ctx); 444 dev_put(dev); 445 if (ret < 0) { 446 genlmsg_cancel(skb, ehdr); 447 if (ret == -EOPNOTSUPP) 448 goto lock_and_cont; 449 if (likely(skb->len)) 450 ret = skb->len; 451 goto out; 452 } 453 genlmsg_end(skb, ehdr); 454 lock_and_cont: 455 rtnl_lock(); 456 if (net->dev_base_seq != seq) { 457 s_idx = idx + 1; 458 goto restart_chain; 459 } 460 cont: 461 idx++; 462 } 463 464 } 465 rtnl_unlock(); 466 467 out: 468 ctx->pos_hash = h; 469 ctx->pos_idx = idx; 470 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 471 472 return ret; 473 } 474 475 /* generic ->start() handler for GET requests */ 476 static int ethnl_default_start(struct netlink_callback *cb) 477 { 478 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 479 struct ethnl_reply_data *reply_data; 480 const struct ethnl_request_ops *ops; 481 struct ethnl_req_info *req_info; 482 struct genlmsghdr *ghdr; 483 int ret; 484 485 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 486 487 ghdr = nlmsg_data(cb->nlh); 488 ops = ethnl_default_requests[ghdr->cmd]; 489 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 490 return -EOPNOTSUPP; 491 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 492 if (!req_info) 493 return -ENOMEM; 494 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 495 if (!reply_data) { 496 ret = -ENOMEM; 497 goto free_req_info; 498 } 499 500 ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops, 501 cb->extack, false); 502 if (req_info->dev) { 503 /* We ignore device specification in dump requests but as the 504 * same parser as for non-dump (doit) requests is used, it 505 * would take reference to the device if it finds one 506 */ 507 dev_put(req_info->dev); 508 req_info->dev = NULL; 509 } 510 if (ret < 0) 511 goto free_reply_data; 512 513 ctx->ops = ops; 514 ctx->req_info = req_info; 515 ctx->reply_data = reply_data; 516 ctx->pos_hash = 0; 517 ctx->pos_idx = 0; 518 519 return 0; 520 521 free_reply_data: 522 kfree(reply_data); 523 free_req_info: 524 kfree(req_info); 525 526 return ret; 527 } 528 529 /* default ->done() handler for GET requests */ 530 static int ethnl_default_done(struct netlink_callback *cb) 531 { 532 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 533 534 kfree(ctx->reply_data); 535 kfree(ctx->req_info); 536 537 return 0; 538 } 539 540 static const struct ethnl_request_ops * 541 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 542 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 543 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 544 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 545 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 546 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 547 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 548 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 549 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 550 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 551 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 552 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 553 }; 554 555 /* default notification handler */ 556 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 557 const void *data) 558 { 559 struct ethnl_reply_data *reply_data; 560 const struct ethnl_request_ops *ops; 561 struct ethnl_req_info *req_info; 562 struct sk_buff *skb; 563 void *reply_payload; 564 int reply_len; 565 int ret; 566 567 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 568 !ethnl_default_notify_ops[cmd], 569 "unexpected notification type %u\n", cmd)) 570 return; 571 ops = ethnl_default_notify_ops[cmd]; 572 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 573 if (!req_info) 574 return; 575 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 576 if (!reply_data) { 577 kfree(req_info); 578 return; 579 } 580 581 req_info->dev = dev; 582 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 583 584 ethnl_init_reply_data(reply_data, ops, dev); 585 ret = ops->prepare_data(req_info, reply_data, NULL); 586 if (ret < 0) 587 goto err_cleanup; 588 ret = ops->reply_size(req_info, reply_data); 589 if (ret < 0) 590 goto err_cleanup; 591 reply_len = ret; 592 ret = -ENOMEM; 593 skb = genlmsg_new(reply_len, GFP_KERNEL); 594 if (!skb) 595 goto err_cleanup; 596 reply_payload = ethnl_bcastmsg_put(skb, cmd); 597 if (!reply_payload) 598 goto err_skb; 599 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 600 if (ret < 0) 601 goto err_msg; 602 ret = ops->fill_reply(skb, req_info, reply_data); 603 if (ret < 0) 604 goto err_msg; 605 if (ops->cleanup_data) 606 ops->cleanup_data(reply_data); 607 608 genlmsg_end(skb, reply_payload); 609 kfree(reply_data); 610 kfree(req_info); 611 ethnl_multicast(skb, dev); 612 return; 613 614 err_msg: 615 WARN_ONCE(ret == -EMSGSIZE, 616 "calculated message payload length (%d) not sufficient\n", 617 reply_len); 618 err_skb: 619 nlmsg_free(skb); 620 err_cleanup: 621 if (ops->cleanup_data) 622 ops->cleanup_data(reply_data); 623 kfree(reply_data); 624 kfree(req_info); 625 return; 626 } 627 628 /* notifications */ 629 630 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 631 const void *data); 632 633 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 634 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 635 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 636 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 637 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 638 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 639 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 640 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 641 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 642 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 643 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 644 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 645 }; 646 647 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 648 { 649 if (unlikely(!ethnl_ok)) 650 return; 651 ASSERT_RTNL(); 652 653 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 654 ethnl_notify_handlers[cmd])) 655 ethnl_notify_handlers[cmd](dev, cmd, data); 656 else 657 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 658 cmd, netdev_name(dev)); 659 } 660 EXPORT_SYMBOL(ethtool_notify); 661 662 static void ethnl_notify_features(struct netdev_notifier_info *info) 663 { 664 struct net_device *dev = netdev_notifier_info_to_dev(info); 665 666 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 667 } 668 669 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 670 void *ptr) 671 { 672 switch (event) { 673 case NETDEV_FEAT_CHANGE: 674 ethnl_notify_features(ptr); 675 break; 676 } 677 678 return NOTIFY_DONE; 679 } 680 681 static struct notifier_block ethnl_netdev_notifier = { 682 .notifier_call = ethnl_netdev_event, 683 }; 684 685 /* genetlink setup */ 686 687 static const struct genl_ops ethtool_genl_ops[] = { 688 { 689 .cmd = ETHTOOL_MSG_STRSET_GET, 690 .doit = ethnl_default_doit, 691 .start = ethnl_default_start, 692 .dumpit = ethnl_default_dumpit, 693 .done = ethnl_default_done, 694 }, 695 { 696 .cmd = ETHTOOL_MSG_LINKINFO_GET, 697 .doit = ethnl_default_doit, 698 .start = ethnl_default_start, 699 .dumpit = ethnl_default_dumpit, 700 .done = ethnl_default_done, 701 }, 702 { 703 .cmd = ETHTOOL_MSG_LINKINFO_SET, 704 .flags = GENL_UNS_ADMIN_PERM, 705 .doit = ethnl_set_linkinfo, 706 }, 707 { 708 .cmd = ETHTOOL_MSG_LINKMODES_GET, 709 .doit = ethnl_default_doit, 710 .start = ethnl_default_start, 711 .dumpit = ethnl_default_dumpit, 712 .done = ethnl_default_done, 713 }, 714 { 715 .cmd = ETHTOOL_MSG_LINKMODES_SET, 716 .flags = GENL_UNS_ADMIN_PERM, 717 .doit = ethnl_set_linkmodes, 718 }, 719 { 720 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 721 .doit = ethnl_default_doit, 722 .start = ethnl_default_start, 723 .dumpit = ethnl_default_dumpit, 724 .done = ethnl_default_done, 725 }, 726 { 727 .cmd = ETHTOOL_MSG_DEBUG_GET, 728 .doit = ethnl_default_doit, 729 .start = ethnl_default_start, 730 .dumpit = ethnl_default_dumpit, 731 .done = ethnl_default_done, 732 }, 733 { 734 .cmd = ETHTOOL_MSG_DEBUG_SET, 735 .flags = GENL_UNS_ADMIN_PERM, 736 .doit = ethnl_set_debug, 737 }, 738 { 739 .cmd = ETHTOOL_MSG_WOL_GET, 740 .flags = GENL_UNS_ADMIN_PERM, 741 .doit = ethnl_default_doit, 742 .start = ethnl_default_start, 743 .dumpit = ethnl_default_dumpit, 744 .done = ethnl_default_done, 745 }, 746 { 747 .cmd = ETHTOOL_MSG_WOL_SET, 748 .flags = GENL_UNS_ADMIN_PERM, 749 .doit = ethnl_set_wol, 750 }, 751 { 752 .cmd = ETHTOOL_MSG_FEATURES_GET, 753 .doit = ethnl_default_doit, 754 .start = ethnl_default_start, 755 .dumpit = ethnl_default_dumpit, 756 .done = ethnl_default_done, 757 }, 758 { 759 .cmd = ETHTOOL_MSG_FEATURES_SET, 760 .flags = GENL_UNS_ADMIN_PERM, 761 .doit = ethnl_set_features, 762 }, 763 { 764 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 765 .doit = ethnl_default_doit, 766 .start = ethnl_default_start, 767 .dumpit = ethnl_default_dumpit, 768 .done = ethnl_default_done, 769 }, 770 { 771 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 772 .flags = GENL_UNS_ADMIN_PERM, 773 .doit = ethnl_set_privflags, 774 }, 775 { 776 .cmd = ETHTOOL_MSG_RINGS_GET, 777 .doit = ethnl_default_doit, 778 .start = ethnl_default_start, 779 .dumpit = ethnl_default_dumpit, 780 .done = ethnl_default_done, 781 }, 782 { 783 .cmd = ETHTOOL_MSG_RINGS_SET, 784 .flags = GENL_UNS_ADMIN_PERM, 785 .doit = ethnl_set_rings, 786 }, 787 { 788 .cmd = ETHTOOL_MSG_CHANNELS_GET, 789 .doit = ethnl_default_doit, 790 .start = ethnl_default_start, 791 .dumpit = ethnl_default_dumpit, 792 .done = ethnl_default_done, 793 }, 794 { 795 .cmd = ETHTOOL_MSG_CHANNELS_SET, 796 .flags = GENL_UNS_ADMIN_PERM, 797 .doit = ethnl_set_channels, 798 }, 799 { 800 .cmd = ETHTOOL_MSG_COALESCE_GET, 801 .doit = ethnl_default_doit, 802 .start = ethnl_default_start, 803 .dumpit = ethnl_default_dumpit, 804 .done = ethnl_default_done, 805 }, 806 { 807 .cmd = ETHTOOL_MSG_COALESCE_SET, 808 .flags = GENL_UNS_ADMIN_PERM, 809 .doit = ethnl_set_coalesce, 810 }, 811 { 812 .cmd = ETHTOOL_MSG_PAUSE_GET, 813 .doit = ethnl_default_doit, 814 .start = ethnl_default_start, 815 .dumpit = ethnl_default_dumpit, 816 .done = ethnl_default_done, 817 }, 818 { 819 .cmd = ETHTOOL_MSG_PAUSE_SET, 820 .flags = GENL_UNS_ADMIN_PERM, 821 .doit = ethnl_set_pause, 822 }, 823 { 824 .cmd = ETHTOOL_MSG_EEE_GET, 825 .doit = ethnl_default_doit, 826 .start = ethnl_default_start, 827 .dumpit = ethnl_default_dumpit, 828 .done = ethnl_default_done, 829 }, 830 { 831 .cmd = ETHTOOL_MSG_EEE_SET, 832 .flags = GENL_UNS_ADMIN_PERM, 833 .doit = ethnl_set_eee, 834 }, 835 { 836 .cmd = ETHTOOL_MSG_TSINFO_GET, 837 .doit = ethnl_default_doit, 838 .start = ethnl_default_start, 839 .dumpit = ethnl_default_dumpit, 840 .done = ethnl_default_done, 841 }, 842 }; 843 844 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 845 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 846 }; 847 848 static struct genl_family ethtool_genl_family = { 849 .name = ETHTOOL_GENL_NAME, 850 .version = ETHTOOL_GENL_VERSION, 851 .netnsok = true, 852 .parallel_ops = true, 853 .ops = ethtool_genl_ops, 854 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 855 .mcgrps = ethtool_nl_mcgrps, 856 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 857 }; 858 859 /* module setup */ 860 861 static int __init ethnl_init(void) 862 { 863 int ret; 864 865 ret = genl_register_family(ðtool_genl_family); 866 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 867 return ret; 868 ethnl_ok = true; 869 870 ret = register_netdevice_notifier(ðnl_netdev_notifier); 871 WARN(ret < 0, "ethtool: net device notifier registration failed"); 872 return ret; 873 } 874 875 subsys_initcall(ethnl_init); 876