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 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd) 185 { 186 return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 187 ðtool_genl_family, 0, cmd); 188 } 189 190 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd) 191 { 192 return genlmsg_put(skb, 0, ++ethnl_bcast_seq, ðtool_genl_family, 0, 193 cmd); 194 } 195 196 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev) 197 { 198 return genlmsg_multicast_netns(ðtool_genl_family, dev_net(dev), skb, 199 0, ETHNL_MCGRP_MONITOR, GFP_KERNEL); 200 } 201 202 /* GET request helpers */ 203 204 /** 205 * struct ethnl_dump_ctx - context structure for generic dumpit() callback 206 * @ops: request ops of currently processed message type 207 * @req_info: parsed request header of processed request 208 * @reply_data: data needed to compose the reply 209 * @pos_hash: saved iteration position - hashbucket 210 * @pos_idx: saved iteration position - index 211 * 212 * These parameters are kept in struct netlink_callback as context preserved 213 * between iterations. They are initialized by ethnl_default_start() and used 214 * in ethnl_default_dumpit() and ethnl_default_done(). 215 */ 216 struct ethnl_dump_ctx { 217 const struct ethnl_request_ops *ops; 218 struct ethnl_req_info *req_info; 219 struct ethnl_reply_data *reply_data; 220 int pos_hash; 221 int pos_idx; 222 }; 223 224 static const struct ethnl_request_ops * 225 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = { 226 [ETHTOOL_MSG_STRSET_GET] = ðnl_strset_request_ops, 227 [ETHTOOL_MSG_LINKINFO_GET] = ðnl_linkinfo_request_ops, 228 [ETHTOOL_MSG_LINKMODES_GET] = ðnl_linkmodes_request_ops, 229 [ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops, 230 [ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops, 231 [ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops, 232 [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops, 233 [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops, 234 [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops, 235 [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops, 236 [ETHTOOL_MSG_COALESCE_GET] = ðnl_coalesce_request_ops, 237 [ETHTOOL_MSG_PAUSE_GET] = ðnl_pause_request_ops, 238 [ETHTOOL_MSG_EEE_GET] = ðnl_eee_request_ops, 239 [ETHTOOL_MSG_TSINFO_GET] = ðnl_tsinfo_request_ops, 240 }; 241 242 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb) 243 { 244 return (struct ethnl_dump_ctx *)cb->ctx; 245 } 246 247 /** 248 * ethnl_default_parse() - Parse request message 249 * @req_info: pointer to structure to put data into 250 * @nlhdr: pointer to request message header 251 * @net: request netns 252 * @request_ops: struct request_ops for request type 253 * @extack: netlink extack for error reporting 254 * @require_dev: fail if no device identified in header 255 * 256 * Parse universal request header and call request specific ->parse_request() 257 * callback (if defined) to parse the rest of the message. 258 * 259 * Return: 0 on success or negative error code 260 */ 261 static int ethnl_default_parse(struct ethnl_req_info *req_info, 262 const struct nlmsghdr *nlhdr, struct net *net, 263 const struct ethnl_request_ops *request_ops, 264 struct netlink_ext_ack *extack, bool require_dev) 265 { 266 struct nlattr **tb; 267 int ret; 268 269 tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]), 270 GFP_KERNEL); 271 if (!tb) 272 return -ENOMEM; 273 274 ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr, 275 request_ops->request_policy, extack); 276 if (ret < 0) 277 goto out; 278 ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr], 279 net, extack, require_dev); 280 if (ret < 0) 281 goto out; 282 283 if (request_ops->parse_request) { 284 ret = request_ops->parse_request(req_info, tb, extack); 285 if (ret < 0) 286 goto out; 287 } 288 289 ret = 0; 290 out: 291 kfree(tb); 292 return ret; 293 } 294 295 /** 296 * ethnl_init_reply_data() - Initialize reply data for GET request 297 * @reply_data: pointer to embedded struct ethnl_reply_data 298 * @ops: instance of struct ethnl_request_ops describing the layout 299 * @dev: network device to initialize the reply for 300 * 301 * Fills the reply data part with zeros and sets the dev member. Must be called 302 * before calling the ->fill_reply() callback (for each iteration when handling 303 * dump requests). 304 */ 305 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data, 306 const struct ethnl_request_ops *ops, 307 struct net_device *dev) 308 { 309 memset(reply_data, 0, ops->reply_data_size); 310 reply_data->dev = dev; 311 } 312 313 /* default ->doit() handler for GET type requests */ 314 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info) 315 { 316 struct ethnl_reply_data *reply_data = NULL; 317 struct ethnl_req_info *req_info = NULL; 318 const u8 cmd = info->genlhdr->cmd; 319 const struct ethnl_request_ops *ops; 320 struct sk_buff *rskb; 321 void *reply_payload; 322 int reply_len; 323 int ret; 324 325 ops = ethnl_default_requests[cmd]; 326 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd)) 327 return -EOPNOTSUPP; 328 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 329 if (!req_info) 330 return -ENOMEM; 331 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 332 if (!reply_data) { 333 kfree(req_info); 334 return -ENOMEM; 335 } 336 337 ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops, 338 info->extack, !ops->allow_nodev_do); 339 if (ret < 0) 340 goto err_dev; 341 ethnl_init_reply_data(reply_data, ops, req_info->dev); 342 343 rtnl_lock(); 344 ret = ops->prepare_data(req_info, reply_data, info); 345 rtnl_unlock(); 346 if (ret < 0) 347 goto err_cleanup; 348 ret = ops->reply_size(req_info, reply_data); 349 if (ret < 0) 350 goto err_cleanup; 351 reply_len = ret + ethnl_reply_header_size(); 352 ret = -ENOMEM; 353 rskb = ethnl_reply_init(reply_len, req_info->dev, ops->reply_cmd, 354 ops->hdr_attr, info, &reply_payload); 355 if (!rskb) 356 goto err_cleanup; 357 ret = ops->fill_reply(rskb, req_info, reply_data); 358 if (ret < 0) 359 goto err_msg; 360 if (ops->cleanup_data) 361 ops->cleanup_data(reply_data); 362 363 genlmsg_end(rskb, reply_payload); 364 if (req_info->dev) 365 dev_put(req_info->dev); 366 kfree(reply_data); 367 kfree(req_info); 368 return genlmsg_reply(rskb, info); 369 370 err_msg: 371 WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len); 372 nlmsg_free(rskb); 373 err_cleanup: 374 if (ops->cleanup_data) 375 ops->cleanup_data(reply_data); 376 err_dev: 377 if (req_info->dev) 378 dev_put(req_info->dev); 379 kfree(reply_data); 380 kfree(req_info); 381 return ret; 382 } 383 384 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev, 385 const struct ethnl_dump_ctx *ctx, 386 struct netlink_callback *cb) 387 { 388 void *ehdr; 389 int ret; 390 391 ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, 392 ðtool_genl_family, 0, ctx->ops->reply_cmd); 393 if (!ehdr) 394 return -EMSGSIZE; 395 396 ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev); 397 rtnl_lock(); 398 ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL); 399 rtnl_unlock(); 400 if (ret < 0) 401 goto out; 402 ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr); 403 if (ret < 0) 404 goto out; 405 ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data); 406 407 out: 408 if (ctx->ops->cleanup_data) 409 ctx->ops->cleanup_data(ctx->reply_data); 410 ctx->reply_data->dev = NULL; 411 if (ret < 0) 412 genlmsg_cancel(skb, ehdr); 413 else 414 genlmsg_end(skb, ehdr); 415 return ret; 416 } 417 418 /* Default ->dumpit() handler for GET requests. Device iteration copied from 419 * rtnl_dump_ifinfo(); we have to be more careful about device hashtable 420 * persistence as we cannot guarantee to hold RTNL lock through the whole 421 * function as rtnetnlink does. 422 */ 423 static int ethnl_default_dumpit(struct sk_buff *skb, 424 struct netlink_callback *cb) 425 { 426 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 427 struct net *net = sock_net(skb->sk); 428 int s_idx = ctx->pos_idx; 429 int h, idx = 0; 430 int ret = 0; 431 432 rtnl_lock(); 433 for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 434 struct hlist_head *head; 435 struct net_device *dev; 436 unsigned int seq; 437 438 head = &net->dev_index_head[h]; 439 440 restart_chain: 441 seq = net->dev_base_seq; 442 cb->seq = seq; 443 idx = 0; 444 hlist_for_each_entry(dev, head, index_hlist) { 445 if (idx < s_idx) 446 goto cont; 447 dev_hold(dev); 448 rtnl_unlock(); 449 450 ret = ethnl_default_dump_one(skb, dev, ctx, cb); 451 dev_put(dev); 452 if (ret < 0) { 453 if (ret == -EOPNOTSUPP) 454 goto lock_and_cont; 455 if (likely(skb->len)) 456 ret = skb->len; 457 goto out; 458 } 459 lock_and_cont: 460 rtnl_lock(); 461 if (net->dev_base_seq != seq) { 462 s_idx = idx + 1; 463 goto restart_chain; 464 } 465 cont: 466 idx++; 467 } 468 469 } 470 rtnl_unlock(); 471 472 out: 473 ctx->pos_hash = h; 474 ctx->pos_idx = idx; 475 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 476 477 return ret; 478 } 479 480 /* generic ->start() handler for GET requests */ 481 static int ethnl_default_start(struct netlink_callback *cb) 482 { 483 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 484 struct ethnl_reply_data *reply_data; 485 const struct ethnl_request_ops *ops; 486 struct ethnl_req_info *req_info; 487 struct genlmsghdr *ghdr; 488 int ret; 489 490 BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx)); 491 492 ghdr = nlmsg_data(cb->nlh); 493 ops = ethnl_default_requests[ghdr->cmd]; 494 if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd)) 495 return -EOPNOTSUPP; 496 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 497 if (!req_info) 498 return -ENOMEM; 499 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 500 if (!reply_data) { 501 ret = -ENOMEM; 502 goto free_req_info; 503 } 504 505 ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops, 506 cb->extack, false); 507 if (req_info->dev) { 508 /* We ignore device specification in dump requests but as the 509 * same parser as for non-dump (doit) requests is used, it 510 * would take reference to the device if it finds one 511 */ 512 dev_put(req_info->dev); 513 req_info->dev = NULL; 514 } 515 if (ret < 0) 516 goto free_reply_data; 517 518 ctx->ops = ops; 519 ctx->req_info = req_info; 520 ctx->reply_data = reply_data; 521 ctx->pos_hash = 0; 522 ctx->pos_idx = 0; 523 524 return 0; 525 526 free_reply_data: 527 kfree(reply_data); 528 free_req_info: 529 kfree(req_info); 530 531 return ret; 532 } 533 534 /* default ->done() handler for GET requests */ 535 static int ethnl_default_done(struct netlink_callback *cb) 536 { 537 struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb); 538 539 kfree(ctx->reply_data); 540 kfree(ctx->req_info); 541 542 return 0; 543 } 544 545 static const struct ethnl_request_ops * 546 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = { 547 [ETHTOOL_MSG_LINKINFO_NTF] = ðnl_linkinfo_request_ops, 548 [ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops, 549 [ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops, 550 [ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops, 551 [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops, 552 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops, 553 [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops, 554 [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops, 555 [ETHTOOL_MSG_COALESCE_NTF] = ðnl_coalesce_request_ops, 556 [ETHTOOL_MSG_PAUSE_NTF] = ðnl_pause_request_ops, 557 [ETHTOOL_MSG_EEE_NTF] = ðnl_eee_request_ops, 558 }; 559 560 /* default notification handler */ 561 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd, 562 const void *data) 563 { 564 struct ethnl_reply_data *reply_data; 565 const struct ethnl_request_ops *ops; 566 struct ethnl_req_info *req_info; 567 struct sk_buff *skb; 568 void *reply_payload; 569 int reply_len; 570 int ret; 571 572 if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX || 573 !ethnl_default_notify_ops[cmd], 574 "unexpected notification type %u\n", cmd)) 575 return; 576 ops = ethnl_default_notify_ops[cmd]; 577 req_info = kzalloc(ops->req_info_size, GFP_KERNEL); 578 if (!req_info) 579 return; 580 reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL); 581 if (!reply_data) { 582 kfree(req_info); 583 return; 584 } 585 586 req_info->dev = dev; 587 req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS; 588 589 ethnl_init_reply_data(reply_data, ops, dev); 590 ret = ops->prepare_data(req_info, reply_data, NULL); 591 if (ret < 0) 592 goto err_cleanup; 593 ret = ops->reply_size(req_info, reply_data); 594 if (ret < 0) 595 goto err_cleanup; 596 reply_len = ret + ethnl_reply_header_size(); 597 ret = -ENOMEM; 598 skb = genlmsg_new(reply_len, GFP_KERNEL); 599 if (!skb) 600 goto err_cleanup; 601 reply_payload = ethnl_bcastmsg_put(skb, cmd); 602 if (!reply_payload) 603 goto err_skb; 604 ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr); 605 if (ret < 0) 606 goto err_msg; 607 ret = ops->fill_reply(skb, req_info, reply_data); 608 if (ret < 0) 609 goto err_msg; 610 if (ops->cleanup_data) 611 ops->cleanup_data(reply_data); 612 613 genlmsg_end(skb, reply_payload); 614 kfree(reply_data); 615 kfree(req_info); 616 ethnl_multicast(skb, dev); 617 return; 618 619 err_msg: 620 WARN_ONCE(ret == -EMSGSIZE, 621 "calculated message payload length (%d) not sufficient\n", 622 reply_len); 623 err_skb: 624 nlmsg_free(skb); 625 err_cleanup: 626 if (ops->cleanup_data) 627 ops->cleanup_data(reply_data); 628 kfree(reply_data); 629 kfree(req_info); 630 return; 631 } 632 633 /* notifications */ 634 635 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd, 636 const void *data); 637 638 static const ethnl_notify_handler_t ethnl_notify_handlers[] = { 639 [ETHTOOL_MSG_LINKINFO_NTF] = ethnl_default_notify, 640 [ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify, 641 [ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify, 642 [ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify, 643 [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify, 644 [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify, 645 [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify, 646 [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify, 647 [ETHTOOL_MSG_COALESCE_NTF] = ethnl_default_notify, 648 [ETHTOOL_MSG_PAUSE_NTF] = ethnl_default_notify, 649 [ETHTOOL_MSG_EEE_NTF] = ethnl_default_notify, 650 }; 651 652 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data) 653 { 654 if (unlikely(!ethnl_ok)) 655 return; 656 ASSERT_RTNL(); 657 658 if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) && 659 ethnl_notify_handlers[cmd])) 660 ethnl_notify_handlers[cmd](dev, cmd, data); 661 else 662 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n", 663 cmd, netdev_name(dev)); 664 } 665 EXPORT_SYMBOL(ethtool_notify); 666 667 static void ethnl_notify_features(struct netdev_notifier_info *info) 668 { 669 struct net_device *dev = netdev_notifier_info_to_dev(info); 670 671 ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL); 672 } 673 674 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event, 675 void *ptr) 676 { 677 switch (event) { 678 case NETDEV_FEAT_CHANGE: 679 ethnl_notify_features(ptr); 680 break; 681 } 682 683 return NOTIFY_DONE; 684 } 685 686 static struct notifier_block ethnl_netdev_notifier = { 687 .notifier_call = ethnl_netdev_event, 688 }; 689 690 /* genetlink setup */ 691 692 static const struct genl_ops ethtool_genl_ops[] = { 693 { 694 .cmd = ETHTOOL_MSG_STRSET_GET, 695 .doit = ethnl_default_doit, 696 .start = ethnl_default_start, 697 .dumpit = ethnl_default_dumpit, 698 .done = ethnl_default_done, 699 }, 700 { 701 .cmd = ETHTOOL_MSG_LINKINFO_GET, 702 .doit = ethnl_default_doit, 703 .start = ethnl_default_start, 704 .dumpit = ethnl_default_dumpit, 705 .done = ethnl_default_done, 706 }, 707 { 708 .cmd = ETHTOOL_MSG_LINKINFO_SET, 709 .flags = GENL_UNS_ADMIN_PERM, 710 .doit = ethnl_set_linkinfo, 711 }, 712 { 713 .cmd = ETHTOOL_MSG_LINKMODES_GET, 714 .doit = ethnl_default_doit, 715 .start = ethnl_default_start, 716 .dumpit = ethnl_default_dumpit, 717 .done = ethnl_default_done, 718 }, 719 { 720 .cmd = ETHTOOL_MSG_LINKMODES_SET, 721 .flags = GENL_UNS_ADMIN_PERM, 722 .doit = ethnl_set_linkmodes, 723 }, 724 { 725 .cmd = ETHTOOL_MSG_LINKSTATE_GET, 726 .doit = ethnl_default_doit, 727 .start = ethnl_default_start, 728 .dumpit = ethnl_default_dumpit, 729 .done = ethnl_default_done, 730 }, 731 { 732 .cmd = ETHTOOL_MSG_DEBUG_GET, 733 .doit = ethnl_default_doit, 734 .start = ethnl_default_start, 735 .dumpit = ethnl_default_dumpit, 736 .done = ethnl_default_done, 737 }, 738 { 739 .cmd = ETHTOOL_MSG_DEBUG_SET, 740 .flags = GENL_UNS_ADMIN_PERM, 741 .doit = ethnl_set_debug, 742 }, 743 { 744 .cmd = ETHTOOL_MSG_WOL_GET, 745 .flags = GENL_UNS_ADMIN_PERM, 746 .doit = ethnl_default_doit, 747 .start = ethnl_default_start, 748 .dumpit = ethnl_default_dumpit, 749 .done = ethnl_default_done, 750 }, 751 { 752 .cmd = ETHTOOL_MSG_WOL_SET, 753 .flags = GENL_UNS_ADMIN_PERM, 754 .doit = ethnl_set_wol, 755 }, 756 { 757 .cmd = ETHTOOL_MSG_FEATURES_GET, 758 .doit = ethnl_default_doit, 759 .start = ethnl_default_start, 760 .dumpit = ethnl_default_dumpit, 761 .done = ethnl_default_done, 762 }, 763 { 764 .cmd = ETHTOOL_MSG_FEATURES_SET, 765 .flags = GENL_UNS_ADMIN_PERM, 766 .doit = ethnl_set_features, 767 }, 768 { 769 .cmd = ETHTOOL_MSG_PRIVFLAGS_GET, 770 .doit = ethnl_default_doit, 771 .start = ethnl_default_start, 772 .dumpit = ethnl_default_dumpit, 773 .done = ethnl_default_done, 774 }, 775 { 776 .cmd = ETHTOOL_MSG_PRIVFLAGS_SET, 777 .flags = GENL_UNS_ADMIN_PERM, 778 .doit = ethnl_set_privflags, 779 }, 780 { 781 .cmd = ETHTOOL_MSG_RINGS_GET, 782 .doit = ethnl_default_doit, 783 .start = ethnl_default_start, 784 .dumpit = ethnl_default_dumpit, 785 .done = ethnl_default_done, 786 }, 787 { 788 .cmd = ETHTOOL_MSG_RINGS_SET, 789 .flags = GENL_UNS_ADMIN_PERM, 790 .doit = ethnl_set_rings, 791 }, 792 { 793 .cmd = ETHTOOL_MSG_CHANNELS_GET, 794 .doit = ethnl_default_doit, 795 .start = ethnl_default_start, 796 .dumpit = ethnl_default_dumpit, 797 .done = ethnl_default_done, 798 }, 799 { 800 .cmd = ETHTOOL_MSG_CHANNELS_SET, 801 .flags = GENL_UNS_ADMIN_PERM, 802 .doit = ethnl_set_channels, 803 }, 804 { 805 .cmd = ETHTOOL_MSG_COALESCE_GET, 806 .doit = ethnl_default_doit, 807 .start = ethnl_default_start, 808 .dumpit = ethnl_default_dumpit, 809 .done = ethnl_default_done, 810 }, 811 { 812 .cmd = ETHTOOL_MSG_COALESCE_SET, 813 .flags = GENL_UNS_ADMIN_PERM, 814 .doit = ethnl_set_coalesce, 815 }, 816 { 817 .cmd = ETHTOOL_MSG_PAUSE_GET, 818 .doit = ethnl_default_doit, 819 .start = ethnl_default_start, 820 .dumpit = ethnl_default_dumpit, 821 .done = ethnl_default_done, 822 }, 823 { 824 .cmd = ETHTOOL_MSG_PAUSE_SET, 825 .flags = GENL_UNS_ADMIN_PERM, 826 .doit = ethnl_set_pause, 827 }, 828 { 829 .cmd = ETHTOOL_MSG_EEE_GET, 830 .doit = ethnl_default_doit, 831 .start = ethnl_default_start, 832 .dumpit = ethnl_default_dumpit, 833 .done = ethnl_default_done, 834 }, 835 { 836 .cmd = ETHTOOL_MSG_EEE_SET, 837 .flags = GENL_UNS_ADMIN_PERM, 838 .doit = ethnl_set_eee, 839 }, 840 { 841 .cmd = ETHTOOL_MSG_TSINFO_GET, 842 .doit = ethnl_default_doit, 843 .start = ethnl_default_start, 844 .dumpit = ethnl_default_dumpit, 845 .done = ethnl_default_done, 846 }, 847 { 848 .cmd = ETHTOOL_MSG_CABLE_TEST_ACT, 849 .flags = GENL_UNS_ADMIN_PERM, 850 .doit = ethnl_act_cable_test, 851 }, 852 { 853 .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT, 854 .flags = GENL_UNS_ADMIN_PERM, 855 .doit = ethnl_act_cable_test_tdr, 856 }, 857 { 858 .cmd = ETHTOOL_MSG_TUNNEL_INFO_GET, 859 .doit = ethnl_tunnel_info_doit, 860 .start = ethnl_tunnel_info_start, 861 .dumpit = ethnl_tunnel_info_dumpit, 862 }, 863 }; 864 865 static const struct genl_multicast_group ethtool_nl_mcgrps[] = { 866 [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME }, 867 }; 868 869 static struct genl_family ethtool_genl_family = { 870 .name = ETHTOOL_GENL_NAME, 871 .version = ETHTOOL_GENL_VERSION, 872 .netnsok = true, 873 .parallel_ops = true, 874 .ops = ethtool_genl_ops, 875 .n_ops = ARRAY_SIZE(ethtool_genl_ops), 876 .mcgrps = ethtool_nl_mcgrps, 877 .n_mcgrps = ARRAY_SIZE(ethtool_nl_mcgrps), 878 }; 879 880 /* module setup */ 881 882 static int __init ethnl_init(void) 883 { 884 int ret; 885 886 ret = genl_register_family(ðtool_genl_family); 887 if (WARN(ret < 0, "ethtool: genetlink family registration failed")) 888 return ret; 889 ethnl_ok = true; 890 891 ret = register_netdevice_notifier(ðnl_netdev_notifier); 892 WARN(ret < 0, "ethtool: net device notifier registration failed"); 893 return ret; 894 } 895 896 subsys_initcall(ethnl_init); 897