net/ethtool/netlink.c

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