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. Device iteration copied from
 481  * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
 482  * persistence as we cannot guarantee to hold RTNL lock through the whole
 483  * function as rtnetnlink does.
 484  */
 485 static int ethnl_default_dumpit(struct sk_buff *skb,
 486                                 struct netlink_callback *cb)
 487 {
 488         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 489         struct net *net = sock_net(skb->sk);
 490         struct net_device *dev;
 491         int ret = 0;
 492
 493         rtnl_lock();
 494         for_each_netdev_dump(net, dev, ctx->pos_ifindex) {
 495                 dev_hold(dev);
 496                 rtnl_unlock();
 497
 498                 ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb));
 499
 500                 rtnl_lock();
 501                 dev_put(dev);
 502
 503                 if (ret < 0 && ret != -EOPNOTSUPP) {
 504                         if (likely(skb->len))
 505                                 ret = skb->len;
 506                         break;
 507                 }
 508                 ret = 0;
 509         }
 510         rtnl_unlock();
 511
 512         return ret;
 513 }
 514
 515 /* generic ->start() handler for GET requests */
 516 static int ethnl_default_start(struct netlink_callback *cb)
 517 {
 518         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 519         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 520         struct ethnl_reply_data *reply_data;
 521         const struct ethnl_request_ops *ops;
 522         struct ethnl_req_info *req_info;
 523         struct genlmsghdr *ghdr;
 524         int ret;
 525
 526         BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 527
 528         ghdr = nlmsg_data(cb->nlh);
 529         ops = ethnl_default_requests[ghdr->cmd];
 530         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
 531                 return -EOPNOTSUPP;
 532         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 533         if (!req_info)
 534                 return -ENOMEM;
 535         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 536         if (!reply_data) {
 537                 ret = -ENOMEM;
 538                 goto free_req_info;
 539         }
 540
 541         ret = ethnl_default_parse(req_info, &info->info, ops, false);
 542         if (req_info->dev) {
 543                 /* We ignore device specification in dump requests but as the
 544                  * same parser as for non-dump (doit) requests is used, it
 545                  * would take reference to the device if it finds one
 546                  */
 547                 netdev_put(req_info->dev, &req_info->dev_tracker);
 548                 req_info->dev = NULL;
 549         }
 550         if (ret < 0)
 551                 goto free_reply_data;
 552
 553         ctx->ops = ops;
 554         ctx->req_info = req_info;
 555         ctx->reply_data = reply_data;
 556         ctx->pos_ifindex = 0;
 557
 558         return 0;
 559
 560 free_reply_data:
 561         kfree(reply_data);
 562 free_req_info:
 563         kfree(req_info);
 564
 565         return ret;
 566 }
 567
 568 /* default ->done() handler for GET requests */
 569 static int ethnl_default_done(struct netlink_callback *cb)
 570 {
 571         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 572
 573         kfree(ctx->reply_data);
 574         kfree(ctx->req_info);
 575
 576         return 0;
 577 }
 578
 579 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
 580 {
 581         const struct ethnl_request_ops *ops;
 582         struct ethnl_req_info req_info = {};
 583         const u8 cmd = info->genlhdr->cmd;
 584         int ret;
 585
 586         ops = ethnl_default_requests[cmd];
 587         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 588                 return -EOPNOTSUPP;
 589         if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 590                 return -EINVAL;
 591
 592         ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
 593                                          genl_info_net(info), info->extack,
 594                                          true);
 595         if (ret < 0)
 596                 return ret;
 597
 598         if (ops->set_validate) {
 599                 ret = ops->set_validate(&req_info, info);
 600                 /* 0 means nothing to do */
 601                 if (ret <= 0)
 602                         goto out_dev;
 603         }
 604
 605         rtnl_lock();
 606         ret = ethnl_ops_begin(req_info.dev);
 607         if (ret < 0)
 608                 goto out_rtnl;
 609
 610         ret = ops->set(&req_info, info);
 611         if (ret <= 0)
 612                 goto out_ops;
 613         ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
 614
 615         ret = 0;
 616 out_ops:
 617         ethnl_ops_complete(req_info.dev);
 618 out_rtnl:
 619         rtnl_unlock();
 620 out_dev:
 621         ethnl_parse_header_dev_put(&req_info);
 622         return ret;
 623 }
 624
 625 static const struct ethnl_request_ops *
 626 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 627         [ETHTOOL_MSG_LINKINFO_NTF]      = &ethnl_linkinfo_request_ops,
 628         [ETHTOOL_MSG_LINKMODES_NTF]     = &ethnl_linkmodes_request_ops,
 629         [ETHTOOL_MSG_DEBUG_NTF]         = &ethnl_debug_request_ops,
 630         [ETHTOOL_MSG_WOL_NTF]           = &ethnl_wol_request_ops,
 631         [ETHTOOL_MSG_FEATURES_NTF]      = &ethnl_features_request_ops,
 632         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = &ethnl_privflags_request_ops,
 633         [ETHTOOL_MSG_RINGS_NTF]         = &ethnl_rings_request_ops,
 634         [ETHTOOL_MSG_CHANNELS_NTF]      = &ethnl_channels_request_ops,
 635         [ETHTOOL_MSG_COALESCE_NTF]      = &ethnl_coalesce_request_ops,
 636         [ETHTOOL_MSG_PAUSE_NTF]         = &ethnl_pause_request_ops,
 637         [ETHTOOL_MSG_EEE_NTF]           = &ethnl_eee_request_ops,
 638         [ETHTOOL_MSG_FEC_NTF]           = &ethnl_fec_request_ops,
 639         [ETHTOOL_MSG_MODULE_NTF]        = &ethnl_module_request_ops,
 640         [ETHTOOL_MSG_PLCA_NTF]          = &ethnl_plca_cfg_request_ops,
 641         [ETHTOOL_MSG_MM_NTF]            = &ethnl_mm_request_ops,
 642 };
 643
 644 /* default notification handler */
 645 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 646                                  const void *data)
 647 {
 648         struct ethnl_reply_data *reply_data;
 649         const struct ethnl_request_ops *ops;
 650         struct ethnl_req_info *req_info;
 651         struct genl_info info;
 652         struct sk_buff *skb;
 653         void *reply_payload;
 654         int reply_len;
 655         int ret;
 656
 657         genl_info_init_ntf(&info, &ethtool_genl_family, cmd);
 658
 659         if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
 660                       !ethnl_default_notify_ops[cmd],
 661                       "unexpected notification type %u\n", cmd))
 662                 return;
 663         ops = ethnl_default_notify_ops[cmd];
 664         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 665         if (!req_info)
 666                 return;
 667         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 668         if (!reply_data) {
 669                 kfree(req_info);
 670                 return;
 671         }
 672
 673         req_info->dev = dev;
 674         req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
 675
 676         ethnl_init_reply_data(reply_data, ops, dev);
 677         ret = ops->prepare_data(req_info, reply_data, &info);
 678         if (ret < 0)
 679                 goto err_cleanup;
 680         ret = ops->reply_size(req_info, reply_data);
 681         if (ret < 0)
 682                 goto err_cleanup;
 683         reply_len = ret + ethnl_reply_header_size();
 684         skb = genlmsg_new(reply_len, GFP_KERNEL);
 685         if (!skb)
 686                 goto err_cleanup;
 687         reply_payload = ethnl_bcastmsg_put(skb, cmd);
 688         if (!reply_payload)
 689                 goto err_skb;
 690         ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
 691         if (ret < 0)
 692                 goto err_msg;
 693         ret = ops->fill_reply(skb, req_info, reply_data);
 694         if (ret < 0)
 695                 goto err_msg;
 696         if (ops->cleanup_data)
 697                 ops->cleanup_data(reply_data);
 698
 699         genlmsg_end(skb, reply_payload);
 700         kfree(reply_data);
 701         kfree(req_info);
 702         ethnl_multicast(skb, dev);
 703         return;
 704
 705 err_msg:
 706         WARN_ONCE(ret == -EMSGSIZE,
 707                   "calculated message payload length (%d) not sufficient\n",
 708                   reply_len);
 709 err_skb:
 710         nlmsg_free(skb);
 711 err_cleanup:
 712         if (ops->cleanup_data)
 713                 ops->cleanup_data(reply_data);
 714         kfree(reply_data);
 715         kfree(req_info);
 716         return;
 717 }
 718
 719 /* notifications */
 720
 721 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
 722                                        const void *data);
 723
 724 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 725         [ETHTOOL_MSG_LINKINFO_NTF]      = ethnl_default_notify,
 726         [ETHTOOL_MSG_LINKMODES_NTF]     = ethnl_default_notify,
 727         [ETHTOOL_MSG_DEBUG_NTF]         = ethnl_default_notify,
 728         [ETHTOOL_MSG_WOL_NTF]           = ethnl_default_notify,
 729         [ETHTOOL_MSG_FEATURES_NTF]      = ethnl_default_notify,
 730         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = ethnl_default_notify,
 731         [ETHTOOL_MSG_RINGS_NTF]         = ethnl_default_notify,
 732         [ETHTOOL_MSG_CHANNELS_NTF]      = ethnl_default_notify,
 733         [ETHTOOL_MSG_COALESCE_NTF]      = ethnl_default_notify,
 734         [ETHTOOL_MSG_PAUSE_NTF]         = ethnl_default_notify,
 735         [ETHTOOL_MSG_EEE_NTF]           = ethnl_default_notify,
 736         [ETHTOOL_MSG_FEC_NTF]           = ethnl_default_notify,
 737         [ETHTOOL_MSG_MODULE_NTF]        = ethnl_default_notify,
 738         [ETHTOOL_MSG_PLCA_NTF]          = ethnl_default_notify,
 739         [ETHTOOL_MSG_MM_NTF]            = ethnl_default_notify,
 740 };
 741
 742 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
 743 {
 744         if (unlikely(!ethnl_ok))
 745                 return;
 746         ASSERT_RTNL();
 747
 748         if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
 749                    ethnl_notify_handlers[cmd]))
 750                 ethnl_notify_handlers[cmd](dev, cmd, data);
 751         else
 752                 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
 753                           cmd, netdev_name(dev));
 754 }
 755 EXPORT_SYMBOL(ethtool_notify);
 756
 757 static void ethnl_notify_features(struct netdev_notifier_info *info)
 758 {
 759         struct net_device *dev = netdev_notifier_info_to_dev(info);
 760
 761         ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
 762 }
 763
 764 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
 765                               void *ptr)
 766 {
 767         switch (event) {
 768         case NETDEV_FEAT_CHANGE:
 769                 ethnl_notify_features(ptr);
 770                 break;
 771         }
 772
 773         return NOTIFY_DONE;
 774 }
 775
 776 static struct notifier_block ethnl_netdev_notifier = {
 777         .notifier_call = ethnl_netdev_event,
 778 };
 779
 780 /* genetlink setup */
 781
 782 static const struct genl_ops ethtool_genl_ops[] = {
 783         {
 784                 .cmd    = ETHTOOL_MSG_STRSET_GET,
 785                 .doit   = ethnl_default_doit,
 786                 .start  = ethnl_default_start,
 787                 .dumpit = ethnl_default_dumpit,
 788                 .done   = ethnl_default_done,
 789                 .policy = ethnl_strset_get_policy,
 790                 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 791         },
 792         {
 793                 .cmd    = ETHTOOL_MSG_LINKINFO_GET,
 794                 .doit   = ethnl_default_doit,
 795                 .start  = ethnl_default_start,
 796                 .dumpit = ethnl_default_dumpit,
 797                 .done   = ethnl_default_done,
 798                 .policy = ethnl_linkinfo_get_policy,
 799                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 800         },
 801         {
 802                 .cmd    = ETHTOOL_MSG_LINKINFO_SET,
 803                 .flags  = GENL_UNS_ADMIN_PERM,
 804                 .doit   = ethnl_default_set_doit,
 805                 .policy = ethnl_linkinfo_set_policy,
 806                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 807         },
 808         {
 809                 .cmd    = ETHTOOL_MSG_LINKMODES_GET,
 810                 .doit   = ethnl_default_doit,
 811                 .start  = ethnl_default_start,
 812                 .dumpit = ethnl_default_dumpit,
 813                 .done   = ethnl_default_done,
 814                 .policy = ethnl_linkmodes_get_policy,
 815                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 816         },
 817         {
 818                 .cmd    = ETHTOOL_MSG_LINKMODES_SET,
 819                 .flags  = GENL_UNS_ADMIN_PERM,
 820                 .doit   = ethnl_default_set_doit,
 821                 .policy = ethnl_linkmodes_set_policy,
 822                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 823         },
 824         {
 825                 .cmd    = ETHTOOL_MSG_LINKSTATE_GET,
 826                 .doit   = ethnl_default_doit,
 827                 .start  = ethnl_default_start,
 828                 .dumpit = ethnl_default_dumpit,
 829                 .done   = ethnl_default_done,
 830                 .policy = ethnl_linkstate_get_policy,
 831                 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 832         },
 833         {
 834                 .cmd    = ETHTOOL_MSG_DEBUG_GET,
 835                 .doit   = ethnl_default_doit,
 836                 .start  = ethnl_default_start,
 837                 .dumpit = ethnl_default_dumpit,
 838                 .done   = ethnl_default_done,
 839                 .policy = ethnl_debug_get_policy,
 840                 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 841         },
 842         {
 843                 .cmd    = ETHTOOL_MSG_DEBUG_SET,
 844                 .flags  = GENL_UNS_ADMIN_PERM,
 845                 .doit   = ethnl_default_set_doit,
 846                 .policy = ethnl_debug_set_policy,
 847                 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 848         },
 849         {
 850                 .cmd    = ETHTOOL_MSG_WOL_GET,
 851                 .flags  = GENL_UNS_ADMIN_PERM,
 852                 .doit   = ethnl_default_doit,
 853                 .start  = ethnl_default_start,
 854                 .dumpit = ethnl_default_dumpit,
 855                 .done   = ethnl_default_done,
 856                 .policy = ethnl_wol_get_policy,
 857                 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 858         },
 859         {
 860                 .cmd    = ETHTOOL_MSG_WOL_SET,
 861                 .flags  = GENL_UNS_ADMIN_PERM,
 862                 .doit   = ethnl_default_set_doit,
 863                 .policy = ethnl_wol_set_policy,
 864                 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 865         },
 866         {
 867                 .cmd    = ETHTOOL_MSG_FEATURES_GET,
 868                 .doit   = ethnl_default_doit,
 869                 .start  = ethnl_default_start,
 870                 .dumpit = ethnl_default_dumpit,
 871                 .done   = ethnl_default_done,
 872                 .policy = ethnl_features_get_policy,
 873                 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 874         },
 875         {
 876                 .cmd    = ETHTOOL_MSG_FEATURES_SET,
 877                 .flags  = GENL_UNS_ADMIN_PERM,
 878                 .doit   = ethnl_set_features,
 879                 .policy = ethnl_features_set_policy,
 880                 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 881         },
 882         {
 883                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_GET,
 884                 .doit   = ethnl_default_doit,
 885                 .start  = ethnl_default_start,
 886                 .dumpit = ethnl_default_dumpit,
 887                 .done   = ethnl_default_done,
 888                 .policy = ethnl_privflags_get_policy,
 889                 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 890         },
 891         {
 892                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_SET,
 893                 .flags  = GENL_UNS_ADMIN_PERM,
 894                 .doit   = ethnl_default_set_doit,
 895                 .policy = ethnl_privflags_set_policy,
 896                 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 897         },
 898         {
 899                 .cmd    = ETHTOOL_MSG_RINGS_GET,
 900                 .doit   = ethnl_default_doit,
 901                 .start  = ethnl_default_start,
 902                 .dumpit = ethnl_default_dumpit,
 903                 .done   = ethnl_default_done,
 904                 .policy = ethnl_rings_get_policy,
 905                 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
 906         },
 907         {
 908                 .cmd    = ETHTOOL_MSG_RINGS_SET,
 909                 .flags  = GENL_UNS_ADMIN_PERM,
 910                 .doit   = ethnl_default_set_doit,
 911                 .policy = ethnl_rings_set_policy,
 912                 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
 913         },
 914         {
 915                 .cmd    = ETHTOOL_MSG_CHANNELS_GET,
 916                 .doit   = ethnl_default_doit,
 917                 .start  = ethnl_default_start,
 918                 .dumpit = ethnl_default_dumpit,
 919                 .done   = ethnl_default_done,
 920                 .policy = ethnl_channels_get_policy,
 921                 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
 922         },
 923         {
 924                 .cmd    = ETHTOOL_MSG_CHANNELS_SET,
 925                 .flags  = GENL_UNS_ADMIN_PERM,
 926                 .doit   = ethnl_default_set_doit,
 927                 .policy = ethnl_channels_set_policy,
 928                 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
 929         },
 930         {
 931                 .cmd    = ETHTOOL_MSG_COALESCE_GET,
 932                 .doit   = ethnl_default_doit,
 933                 .start  = ethnl_default_start,
 934                 .dumpit = ethnl_default_dumpit,
 935                 .done   = ethnl_default_done,
 936                 .policy = ethnl_coalesce_get_policy,
 937                 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
 938         },
 939         {
 940                 .cmd    = ETHTOOL_MSG_COALESCE_SET,
 941                 .flags  = GENL_UNS_ADMIN_PERM,
 942                 .doit   = ethnl_default_set_doit,
 943                 .policy = ethnl_coalesce_set_policy,
 944                 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
 945         },
 946         {
 947                 .cmd    = ETHTOOL_MSG_PAUSE_GET,
 948                 .doit   = ethnl_default_doit,
 949                 .start  = ethnl_default_start,
 950                 .dumpit = ethnl_default_dumpit,
 951                 .done   = ethnl_default_done,
 952                 .policy = ethnl_pause_get_policy,
 953                 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
 954         },
 955         {
 956                 .cmd    = ETHTOOL_MSG_PAUSE_SET,
 957                 .flags  = GENL_UNS_ADMIN_PERM,
 958                 .doit   = ethnl_default_set_doit,
 959                 .policy = ethnl_pause_set_policy,
 960                 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
 961         },
 962         {
 963                 .cmd    = ETHTOOL_MSG_EEE_GET,
 964                 .doit   = ethnl_default_doit,
 965                 .start  = ethnl_default_start,
 966                 .dumpit = ethnl_default_dumpit,
 967                 .done   = ethnl_default_done,
 968                 .policy = ethnl_eee_get_policy,
 969                 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
 970         },
 971         {
 972                 .cmd    = ETHTOOL_MSG_EEE_SET,
 973                 .flags  = GENL_UNS_ADMIN_PERM,
 974                 .doit   = ethnl_default_set_doit,
 975                 .policy = ethnl_eee_set_policy,
 976                 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
 977         },
 978         {
 979                 .cmd    = ETHTOOL_MSG_TSINFO_GET,
 980                 .doit   = ethnl_default_doit,
 981                 .start  = ethnl_default_start,
 982                 .dumpit = ethnl_default_dumpit,
 983                 .done   = ethnl_default_done,
 984                 .policy = ethnl_tsinfo_get_policy,
 985                 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
 986         },
 987         {
 988                 .cmd    = ETHTOOL_MSG_CABLE_TEST_ACT,
 989                 .flags  = GENL_UNS_ADMIN_PERM,
 990                 .doit   = ethnl_act_cable_test,
 991                 .policy = ethnl_cable_test_act_policy,
 992                 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
 993         },
 994         {
 995                 .cmd    = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
 996                 .flags  = GENL_UNS_ADMIN_PERM,
 997                 .doit   = ethnl_act_cable_test_tdr,
 998                 .policy = ethnl_cable_test_tdr_act_policy,
 999                 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1000         },
1001         {
1002                 .cmd    = ETHTOOL_MSG_TUNNEL_INFO_GET,
1003                 .doit   = ethnl_tunnel_info_doit,
1004                 .start  = ethnl_tunnel_info_start,
1005                 .dumpit = ethnl_tunnel_info_dumpit,
1006                 .policy = ethnl_tunnel_info_get_policy,
1007                 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1008         },
1009         {
1010                 .cmd    = ETHTOOL_MSG_FEC_GET,
1011                 .doit   = ethnl_default_doit,
1012                 .start  = ethnl_default_start,
1013                 .dumpit = ethnl_default_dumpit,
1014                 .done   = ethnl_default_done,
1015                 .policy = ethnl_fec_get_policy,
1016                 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1017         },
1018         {
1019                 .cmd    = ETHTOOL_MSG_FEC_SET,
1020                 .flags  = GENL_UNS_ADMIN_PERM,
1021                 .doit   = ethnl_default_set_doit,
1022                 .policy = ethnl_fec_set_policy,
1023                 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1024         },
1025         {
1026                 .cmd    = ETHTOOL_MSG_MODULE_EEPROM_GET,
1027                 .flags  = GENL_UNS_ADMIN_PERM,
1028                 .doit   = ethnl_default_doit,
1029                 .start  = ethnl_default_start,
1030                 .dumpit = ethnl_default_dumpit,
1031                 .done   = ethnl_default_done,
1032                 .policy = ethnl_module_eeprom_get_policy,
1033                 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1034         },
1035         {
1036                 .cmd    = ETHTOOL_MSG_STATS_GET,
1037                 .doit   = ethnl_default_doit,
1038                 .start  = ethnl_default_start,
1039                 .dumpit = ethnl_default_dumpit,
1040                 .done   = ethnl_default_done,
1041                 .policy = ethnl_stats_get_policy,
1042                 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1043         },
1044         {
1045                 .cmd    = ETHTOOL_MSG_PHC_VCLOCKS_GET,
1046                 .doit   = ethnl_default_doit,
1047                 .start  = ethnl_default_start,
1048                 .dumpit = ethnl_default_dumpit,
1049                 .done   = ethnl_default_done,
1050                 .policy = ethnl_phc_vclocks_get_policy,
1051                 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1052         },
1053         {
1054                 .cmd    = ETHTOOL_MSG_MODULE_GET,
1055                 .doit   = ethnl_default_doit,
1056                 .start  = ethnl_default_start,
1057                 .dumpit = ethnl_default_dumpit,
1058                 .done   = ethnl_default_done,
1059                 .policy = ethnl_module_get_policy,
1060                 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1061         },
1062         {
1063                 .cmd    = ETHTOOL_MSG_MODULE_SET,
1064                 .flags  = GENL_UNS_ADMIN_PERM,
1065                 .doit   = ethnl_default_set_doit,
1066                 .policy = ethnl_module_set_policy,
1067                 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1068         },
1069         {
1070                 .cmd    = ETHTOOL_MSG_PSE_GET,
1071                 .doit   = ethnl_default_doit,
1072                 .start  = ethnl_default_start,
1073                 .dumpit = ethnl_default_dumpit,
1074                 .done   = ethnl_default_done,
1075                 .policy = ethnl_pse_get_policy,
1076                 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1077         },
1078         {
1079                 .cmd    = ETHTOOL_MSG_PSE_SET,
1080                 .flags  = GENL_UNS_ADMIN_PERM,
1081                 .doit   = ethnl_default_set_doit,
1082                 .policy = ethnl_pse_set_policy,
1083                 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1084         },
1085         {
1086                 .cmd    = ETHTOOL_MSG_RSS_GET,
1087                 .doit   = ethnl_default_doit,
1088                 .policy = ethnl_rss_get_policy,
1089                 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1090         },
1091         {
1092                 .cmd    = ETHTOOL_MSG_PLCA_GET_CFG,
1093                 .doit   = ethnl_default_doit,
1094                 .start  = ethnl_default_start,
1095                 .dumpit = ethnl_default_dumpit,
1096                 .done   = ethnl_default_done,
1097                 .policy = ethnl_plca_get_cfg_policy,
1098                 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1099         },
1100         {
1101                 .cmd    = ETHTOOL_MSG_PLCA_SET_CFG,
1102                 .flags  = GENL_UNS_ADMIN_PERM,
1103                 .doit   = ethnl_default_set_doit,
1104                 .policy = ethnl_plca_set_cfg_policy,
1105                 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1106         },
1107         {
1108                 .cmd    = ETHTOOL_MSG_PLCA_GET_STATUS,
1109                 .doit   = ethnl_default_doit,
1110                 .start  = ethnl_default_start,
1111                 .dumpit = ethnl_default_dumpit,
1112                 .done   = ethnl_default_done,
1113                 .policy = ethnl_plca_get_status_policy,
1114                 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1115         },
1116         {
1117                 .cmd    = ETHTOOL_MSG_MM_GET,
1118                 .doit   = ethnl_default_doit,
1119                 .start  = ethnl_default_start,
1120                 .dumpit = ethnl_default_dumpit,
1121                 .done   = ethnl_default_done,
1122                 .policy = ethnl_mm_get_policy,
1123                 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1124         },
1125         {
1126                 .cmd    = ETHTOOL_MSG_MM_SET,
1127                 .flags  = GENL_UNS_ADMIN_PERM,
1128                 .doit   = ethnl_default_set_doit,
1129                 .policy = ethnl_mm_set_policy,
1130                 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1131         },
1132 };
1133
1134 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1135         [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1136 };
1137
1138 static struct genl_family ethtool_genl_family __ro_after_init = {
1139         .name           = ETHTOOL_GENL_NAME,
1140         .version        = ETHTOOL_GENL_VERSION,
1141         .netnsok        = true,
1142         .parallel_ops   = true,
1143         .ops            = ethtool_genl_ops,
1144         .n_ops          = ARRAY_SIZE(ethtool_genl_ops),
1145         .resv_start_op  = ETHTOOL_MSG_MODULE_GET + 1,
1146         .mcgrps         = ethtool_nl_mcgrps,
1147         .n_mcgrps       = ARRAY_SIZE(ethtool_nl_mcgrps),
1148 };
1149
1150 /* module setup */
1151
1152 static int __init ethnl_init(void)
1153 {
1154         int ret;
1155
1156         ret = genl_register_family(&ethtool_genl_family);
1157         if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1158                 return ret;
1159         ethnl_ok = true;
1160
1161         ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1162         WARN(ret < 0, "ethtool: net device notifier registration failed");
1163         return ret;
1164 }
1165
1166 subsys_initcall(ethnl_init);