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                 NL_SET_ERR_MSG(extack, "request header missing");
 100                 return -EINVAL;
 101         }
 102         /* No validation here, command policy should have a nested policy set
 103          * for the header, therefore validation should have already been done.
 104          */
 105         ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
 106                                NULL, extack);
 107         if (ret < 0)
 108                 return ret;
 109         if (tb[ETHTOOL_A_HEADER_FLAGS])
 110                 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
 111
 112         devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
 113         if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
 114                 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
 115
 116                 dev = dev_get_by_index(net, ifindex);
 117                 if (!dev) {
 118                         NL_SET_ERR_MSG_ATTR(extack,
 119                                             tb[ETHTOOL_A_HEADER_DEV_INDEX],
 120                                             "no device matches ifindex");
 121                         return -ENODEV;
 122                 }
 123                 /* if both ifindex and ifname are passed, they must match */
 124                 if (devname_attr &&
 125                     strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
 126                         dev_put(dev);
 127                         NL_SET_ERR_MSG_ATTR(extack, header,
 128                                             "ifindex and name do not match");
 129                         return -ENODEV;
 130                 }
 131         } else if (devname_attr) {
 132                 dev = dev_get_by_name(net, nla_data(devname_attr));
 133                 if (!dev) {
 134                         NL_SET_ERR_MSG_ATTR(extack, devname_attr,
 135                                             "no device matches name");
 136                         return -ENODEV;
 137                 }
 138         } else if (require_dev) {
 139                 NL_SET_ERR_MSG_ATTR(extack, header,
 140                                     "neither ifindex nor name specified");
 141                 return -EINVAL;
 142         }
 143
 144         req_info->dev = dev;
 145         if (dev)
 146                 netdev_tracker_alloc(dev, &req_info->dev_tracker, GFP_KERNEL);
 147         req_info->flags = flags;
 148         return 0;
 149 }
 150
 151 /**
 152  * ethnl_fill_reply_header() - Put common header into a reply message
 153  * @skb:      skb with the message
 154  * @dev:      network device to describe in header
 155  * @attrtype: attribute type to use for the nest
 156  *
 157  * Create a nested attribute with attributes describing given network device.
 158  *
 159  * Return: 0 on success, error value (-EMSGSIZE only) on error
 160  */
 161 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
 162                             u16 attrtype)
 163 {
 164         struct nlattr *nest;
 165
 166         if (!dev)
 167                 return 0;
 168         nest = nla_nest_start(skb, attrtype);
 169         if (!nest)
 170                 return -EMSGSIZE;
 171
 172         if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
 173             nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
 174                 goto nla_put_failure;
 175         /* If more attributes are put into reply header, ethnl_header_size()
 176          * must be updated to account for them.
 177          */
 178
 179         nla_nest_end(skb, nest);
 180         return 0;
 181
 182 nla_put_failure:
 183         nla_nest_cancel(skb, nest);
 184         return -EMSGSIZE;
 185 }
 186
 187 /**
 188  * ethnl_reply_init() - Create skb for a reply and fill device identification
 189  * @payload:      payload length (without netlink and genetlink header)
 190  * @dev:          device the reply is about (may be null)
 191  * @cmd:          ETHTOOL_MSG_* message type for reply
 192  * @hdr_attrtype: attribute type for common header
 193  * @info:         genetlink info of the received packet we respond to
 194  * @ehdrp:        place to store payload pointer returned by genlmsg_new()
 195  *
 196  * Return: pointer to allocated skb on success, NULL on error
 197  */
 198 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
 199                                  u16 hdr_attrtype, struct genl_info *info,
 200                                  void **ehdrp)
 201 {
 202         struct sk_buff *skb;
 203
 204         skb = genlmsg_new(payload, GFP_KERNEL);
 205         if (!skb)
 206                 goto err;
 207         *ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
 208         if (!*ehdrp)
 209                 goto err_free;
 210
 211         if (dev) {
 212                 int ret;
 213
 214                 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
 215                 if (ret < 0)
 216                         goto err_free;
 217         }
 218         return skb;
 219
 220 err_free:
 221         nlmsg_free(skb);
 222 err:
 223         if (info)
 224                 GENL_SET_ERR_MSG(info, "failed to setup reply message");
 225         return NULL;
 226 }
 227
 228 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
 229 {
 230         return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 231                            &ethtool_genl_family, 0, cmd);
 232 }
 233
 234 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
 235 {
 236         return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
 237                            cmd);
 238 }
 239
 240 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
 241 {
 242         return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
 243                                        0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
 244 }
 245
 246 /* GET request helpers */
 247
 248 /**
 249  * struct ethnl_dump_ctx - context structure for generic dumpit() callback
 250  * @ops:        request ops of currently processed message type
 251  * @req_info:   parsed request header of processed request
 252  * @reply_data: data needed to compose the reply
 253  * @pos_hash:   saved iteration position - hashbucket
 254  * @pos_idx:    saved iteration position - index
 255  *
 256  * These parameters are kept in struct netlink_callback as context preserved
 257  * between iterations. They are initialized by ethnl_default_start() and used
 258  * in ethnl_default_dumpit() and ethnl_default_done().
 259  */
 260 struct ethnl_dump_ctx {
 261         const struct ethnl_request_ops  *ops;
 262         struct ethnl_req_info           *req_info;
 263         struct ethnl_reply_data         *reply_data;
 264         int                             pos_hash;
 265         int                             pos_idx;
 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  * @tb:          parsed attributes
 320  * @net:         request netns
 321  * @request_ops: struct request_ops for request type
 322  * @extack:      netlink extack for error reporting
 323  * @require_dev: fail if no device identified in header
 324  *
 325  * Parse universal request header and call request specific ->parse_request()
 326  * callback (if defined) to parse the rest of the message.
 327  *
 328  * Return: 0 on success or negative error code
 329  */
 330 static int ethnl_default_parse(struct ethnl_req_info *req_info,
 331                                struct nlattr **tb, struct net *net,
 332                                const struct ethnl_request_ops *request_ops,
 333                                struct netlink_ext_ack *extack, bool require_dev)
 334 {
 335         int ret;
 336
 337         ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
 338                                          net, extack, 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, 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->attrs, genl_info_net(info),
 397                                   ops, info->extack, !ops->allow_nodev_do);
 398         if (ret < 0)
 399                 goto err_dev;
 400         ethnl_init_reply_data(reply_data, ops, req_info->dev);
 401
 402         rtnl_lock();
 403         ret = ops->prepare_data(req_info, reply_data, info);
 404         rtnl_unlock();
 405         if (ret < 0)
 406                 goto err_cleanup;
 407         ret = ops->reply_size(req_info, reply_data);
 408         if (ret < 0)
 409                 goto err_cleanup;
 410         reply_len = ret;
 411         ret = -ENOMEM;
 412         rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
 413                                 req_info->dev, ops->reply_cmd,
 414                                 ops->hdr_attr, info, &reply_payload);
 415         if (!rskb)
 416                 goto err_cleanup;
 417         hdr_len = rskb->len;
 418         ret = ops->fill_reply(rskb, req_info, reply_data);
 419         if (ret < 0)
 420                 goto err_msg;
 421         WARN_ONCE(rskb->len - hdr_len > reply_len,
 422                   "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
 423                   cmd, reply_len, rskb->len - hdr_len);
 424         if (ops->cleanup_data)
 425                 ops->cleanup_data(reply_data);
 426
 427         genlmsg_end(rskb, reply_payload);
 428         netdev_put(req_info->dev, &req_info->dev_tracker);
 429         kfree(reply_data);
 430         kfree(req_info);
 431         return genlmsg_reply(rskb, info);
 432
 433 err_msg:
 434         WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
 435         nlmsg_free(rskb);
 436 err_cleanup:
 437         if (ops->cleanup_data)
 438                 ops->cleanup_data(reply_data);
 439 err_dev:
 440         netdev_put(req_info->dev, &req_info->dev_tracker);
 441         kfree(reply_data);
 442         kfree(req_info);
 443         return ret;
 444 }
 445
 446 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
 447                                   const struct ethnl_dump_ctx *ctx,
 448                                   struct netlink_callback *cb)
 449 {
 450         void *ehdr;
 451         int ret;
 452
 453         ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 454                            &ethtool_genl_family, NLM_F_MULTI,
 455                            ctx->ops->reply_cmd);
 456         if (!ehdr)
 457                 return -EMSGSIZE;
 458
 459         ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
 460         rtnl_lock();
 461         ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL);
 462         rtnl_unlock();
 463         if (ret < 0)
 464                 goto out;
 465         ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
 466         if (ret < 0)
 467                 goto out;
 468         ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
 469
 470 out:
 471         if (ctx->ops->cleanup_data)
 472                 ctx->ops->cleanup_data(ctx->reply_data);
 473         ctx->reply_data->dev = NULL;
 474         if (ret < 0)
 475                 genlmsg_cancel(skb, ehdr);
 476         else
 477                 genlmsg_end(skb, ehdr);
 478         return ret;
 479 }
 480
 481 /* Default ->dumpit() handler for GET requests. Device iteration copied from
 482  * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
 483  * persistence as we cannot guarantee to hold RTNL lock through the whole
 484  * function as rtnetnlink does.
 485  */
 486 static int ethnl_default_dumpit(struct sk_buff *skb,
 487                                 struct netlink_callback *cb)
 488 {
 489         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 490         struct net *net = sock_net(skb->sk);
 491         int s_idx = ctx->pos_idx;
 492         int h, idx = 0;
 493         int ret = 0;
 494
 495         rtnl_lock();
 496         for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
 497                 struct hlist_head *head;
 498                 struct net_device *dev;
 499                 unsigned int seq;
 500
 501                 head = &net->dev_index_head[h];
 502
 503 restart_chain:
 504                 seq = net->dev_base_seq;
 505                 cb->seq = seq;
 506                 idx = 0;
 507                 hlist_for_each_entry(dev, head, index_hlist) {
 508                         if (idx < s_idx)
 509                                 goto cont;
 510                         dev_hold(dev);
 511                         rtnl_unlock();
 512
 513                         ret = ethnl_default_dump_one(skb, dev, ctx, cb);
 514                         dev_put(dev);
 515                         if (ret < 0) {
 516                                 if (ret == -EOPNOTSUPP)
 517                                         goto lock_and_cont;
 518                                 if (likely(skb->len))
 519                                         ret = skb->len;
 520                                 goto out;
 521                         }
 522 lock_and_cont:
 523                         rtnl_lock();
 524                         if (net->dev_base_seq != seq) {
 525                                 s_idx = idx + 1;
 526                                 goto restart_chain;
 527                         }
 528 cont:
 529                         idx++;
 530                 }
 531
 532         }
 533         rtnl_unlock();
 534
 535 out:
 536         ctx->pos_hash = h;
 537         ctx->pos_idx = idx;
 538         nl_dump_check_consistent(cb, nlmsg_hdr(skb));
 539
 540         return ret;
 541 }
 542
 543 /* generic ->start() handler for GET requests */
 544 static int ethnl_default_start(struct netlink_callback *cb)
 545 {
 546         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 547         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 548         struct ethnl_reply_data *reply_data;
 549         const struct ethnl_request_ops *ops;
 550         struct ethnl_req_info *req_info;
 551         struct genlmsghdr *ghdr;
 552         int ret;
 553
 554         BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 555
 556         ghdr = nlmsg_data(cb->nlh);
 557         ops = ethnl_default_requests[ghdr->cmd];
 558         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
 559                 return -EOPNOTSUPP;
 560         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 561         if (!req_info)
 562                 return -ENOMEM;
 563         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 564         if (!reply_data) {
 565                 ret = -ENOMEM;
 566                 goto free_req_info;
 567         }
 568
 569         ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk),
 570                                   ops, cb->extack, false);
 571         if (req_info->dev) {
 572                 /* We ignore device specification in dump requests but as the
 573                  * same parser as for non-dump (doit) requests is used, it
 574                  * would take reference to the device if it finds one
 575                  */
 576                 netdev_put(req_info->dev, &req_info->dev_tracker);
 577                 req_info->dev = NULL;
 578         }
 579         if (ret < 0)
 580                 goto free_reply_data;
 581
 582         ctx->ops = ops;
 583         ctx->req_info = req_info;
 584         ctx->reply_data = reply_data;
 585         ctx->pos_hash = 0;
 586         ctx->pos_idx = 0;
 587
 588         return 0;
 589
 590 free_reply_data:
 591         kfree(reply_data);
 592 free_req_info:
 593         kfree(req_info);
 594
 595         return ret;
 596 }
 597
 598 /* default ->done() handler for GET requests */
 599 static int ethnl_default_done(struct netlink_callback *cb)
 600 {
 601         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 602
 603         kfree(ctx->reply_data);
 604         kfree(ctx->req_info);
 605
 606         return 0;
 607 }
 608
 609 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
 610 {
 611         const struct ethnl_request_ops *ops;
 612         struct ethnl_req_info req_info = {};
 613         const u8 cmd = info->genlhdr->cmd;
 614         int ret;
 615
 616         ops = ethnl_default_requests[cmd];
 617         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 618                 return -EOPNOTSUPP;
 619         if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 620                 return -EINVAL;
 621
 622         ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
 623                                          genl_info_net(info), info->extack,
 624                                          true);
 625         if (ret < 0)
 626                 return ret;
 627
 628         if (ops->set_validate) {
 629                 ret = ops->set_validate(&req_info, info);
 630                 /* 0 means nothing to do */
 631                 if (ret <= 0)
 632                         goto out_dev;
 633         }
 634
 635         rtnl_lock();
 636         ret = ethnl_ops_begin(req_info.dev);
 637         if (ret < 0)
 638                 goto out_rtnl;
 639
 640         ret = ops->set(&req_info, info);
 641         if (ret <= 0)
 642                 goto out_ops;
 643         ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
 644
 645         ret = 0;
 646 out_ops:
 647         ethnl_ops_complete(req_info.dev);
 648 out_rtnl:
 649         rtnl_unlock();
 650 out_dev:
 651         ethnl_parse_header_dev_put(&req_info);
 652         return ret;
 653 }
 654
 655 static const struct ethnl_request_ops *
 656 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 657         [ETHTOOL_MSG_LINKINFO_NTF]      = &ethnl_linkinfo_request_ops,
 658         [ETHTOOL_MSG_LINKMODES_NTF]     = &ethnl_linkmodes_request_ops,
 659         [ETHTOOL_MSG_DEBUG_NTF]         = &ethnl_debug_request_ops,
 660         [ETHTOOL_MSG_WOL_NTF]           = &ethnl_wol_request_ops,
 661         [ETHTOOL_MSG_FEATURES_NTF]      = &ethnl_features_request_ops,
 662         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = &ethnl_privflags_request_ops,
 663         [ETHTOOL_MSG_RINGS_NTF]         = &ethnl_rings_request_ops,
 664         [ETHTOOL_MSG_CHANNELS_NTF]      = &ethnl_channels_request_ops,
 665         [ETHTOOL_MSG_COALESCE_NTF]      = &ethnl_coalesce_request_ops,
 666         [ETHTOOL_MSG_PAUSE_NTF]         = &ethnl_pause_request_ops,
 667         [ETHTOOL_MSG_EEE_NTF]           = &ethnl_eee_request_ops,
 668         [ETHTOOL_MSG_FEC_NTF]           = &ethnl_fec_request_ops,
 669         [ETHTOOL_MSG_MODULE_NTF]        = &ethnl_module_request_ops,
 670         [ETHTOOL_MSG_PLCA_NTF]          = &ethnl_plca_cfg_request_ops,
 671         [ETHTOOL_MSG_MM_NTF]            = &ethnl_mm_request_ops,
 672 };
 673
 674 /* default notification handler */
 675 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 676                                  const void *data)
 677 {
 678         struct ethnl_reply_data *reply_data;
 679         const struct ethnl_request_ops *ops;
 680         struct ethnl_req_info *req_info;
 681         struct sk_buff *skb;
 682         void *reply_payload;
 683         int reply_len;
 684         int ret;
 685
 686         if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
 687                       !ethnl_default_notify_ops[cmd],
 688                       "unexpected notification type %u\n", cmd))
 689                 return;
 690         ops = ethnl_default_notify_ops[cmd];
 691         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 692         if (!req_info)
 693                 return;
 694         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 695         if (!reply_data) {
 696                 kfree(req_info);
 697                 return;
 698         }
 699
 700         req_info->dev = dev;
 701         req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
 702
 703         ethnl_init_reply_data(reply_data, ops, dev);
 704         ret = ops->prepare_data(req_info, reply_data, NULL);
 705         if (ret < 0)
 706                 goto err_cleanup;
 707         ret = ops->reply_size(req_info, reply_data);
 708         if (ret < 0)
 709                 goto err_cleanup;
 710         reply_len = ret + ethnl_reply_header_size();
 711         skb = genlmsg_new(reply_len, GFP_KERNEL);
 712         if (!skb)
 713                 goto err_cleanup;
 714         reply_payload = ethnl_bcastmsg_put(skb, cmd);
 715         if (!reply_payload)
 716                 goto err_skb;
 717         ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
 718         if (ret < 0)
 719                 goto err_msg;
 720         ret = ops->fill_reply(skb, req_info, reply_data);
 721         if (ret < 0)
 722                 goto err_msg;
 723         if (ops->cleanup_data)
 724                 ops->cleanup_data(reply_data);
 725
 726         genlmsg_end(skb, reply_payload);
 727         kfree(reply_data);
 728         kfree(req_info);
 729         ethnl_multicast(skb, dev);
 730         return;
 731
 732 err_msg:
 733         WARN_ONCE(ret == -EMSGSIZE,
 734                   "calculated message payload length (%d) not sufficient\n",
 735                   reply_len);
 736 err_skb:
 737         nlmsg_free(skb);
 738 err_cleanup:
 739         if (ops->cleanup_data)
 740                 ops->cleanup_data(reply_data);
 741         kfree(reply_data);
 742         kfree(req_info);
 743         return;
 744 }
 745
 746 /* notifications */
 747
 748 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
 749                                        const void *data);
 750
 751 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 752         [ETHTOOL_MSG_LINKINFO_NTF]      = ethnl_default_notify,
 753         [ETHTOOL_MSG_LINKMODES_NTF]     = ethnl_default_notify,
 754         [ETHTOOL_MSG_DEBUG_NTF]         = ethnl_default_notify,
 755         [ETHTOOL_MSG_WOL_NTF]           = ethnl_default_notify,
 756         [ETHTOOL_MSG_FEATURES_NTF]      = ethnl_default_notify,
 757         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = ethnl_default_notify,
 758         [ETHTOOL_MSG_RINGS_NTF]         = ethnl_default_notify,
 759         [ETHTOOL_MSG_CHANNELS_NTF]      = ethnl_default_notify,
 760         [ETHTOOL_MSG_COALESCE_NTF]      = ethnl_default_notify,
 761         [ETHTOOL_MSG_PAUSE_NTF]         = ethnl_default_notify,
 762         [ETHTOOL_MSG_EEE_NTF]           = ethnl_default_notify,
 763         [ETHTOOL_MSG_FEC_NTF]           = ethnl_default_notify,
 764         [ETHTOOL_MSG_MODULE_NTF]        = ethnl_default_notify,
 765         [ETHTOOL_MSG_PLCA_NTF]          = ethnl_default_notify,
 766         [ETHTOOL_MSG_MM_NTF]            = ethnl_default_notify,
 767 };
 768
 769 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
 770 {
 771         if (unlikely(!ethnl_ok))
 772                 return;
 773         ASSERT_RTNL();
 774
 775         if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
 776                    ethnl_notify_handlers[cmd]))
 777                 ethnl_notify_handlers[cmd](dev, cmd, data);
 778         else
 779                 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
 780                           cmd, netdev_name(dev));
 781 }
 782 EXPORT_SYMBOL(ethtool_notify);
 783
 784 static void ethnl_notify_features(struct netdev_notifier_info *info)
 785 {
 786         struct net_device *dev = netdev_notifier_info_to_dev(info);
 787
 788         ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
 789 }
 790
 791 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
 792                               void *ptr)
 793 {
 794         switch (event) {
 795         case NETDEV_FEAT_CHANGE:
 796                 ethnl_notify_features(ptr);
 797                 break;
 798         }
 799
 800         return NOTIFY_DONE;
 801 }
 802
 803 static struct notifier_block ethnl_netdev_notifier = {
 804         .notifier_call = ethnl_netdev_event,
 805 };
 806
 807 /* genetlink setup */
 808
 809 static const struct genl_ops ethtool_genl_ops[] = {
 810         {
 811                 .cmd    = ETHTOOL_MSG_STRSET_GET,
 812                 .doit   = ethnl_default_doit,
 813                 .start  = ethnl_default_start,
 814                 .dumpit = ethnl_default_dumpit,
 815                 .done   = ethnl_default_done,
 816                 .policy = ethnl_strset_get_policy,
 817                 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 818         },
 819         {
 820                 .cmd    = ETHTOOL_MSG_LINKINFO_GET,
 821                 .doit   = ethnl_default_doit,
 822                 .start  = ethnl_default_start,
 823                 .dumpit = ethnl_default_dumpit,
 824                 .done   = ethnl_default_done,
 825                 .policy = ethnl_linkinfo_get_policy,
 826                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 827         },
 828         {
 829                 .cmd    = ETHTOOL_MSG_LINKINFO_SET,
 830                 .flags  = GENL_UNS_ADMIN_PERM,
 831                 .doit   = ethnl_default_set_doit,
 832                 .policy = ethnl_linkinfo_set_policy,
 833                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 834         },
 835         {
 836                 .cmd    = ETHTOOL_MSG_LINKMODES_GET,
 837                 .doit   = ethnl_default_doit,
 838                 .start  = ethnl_default_start,
 839                 .dumpit = ethnl_default_dumpit,
 840                 .done   = ethnl_default_done,
 841                 .policy = ethnl_linkmodes_get_policy,
 842                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 843         },
 844         {
 845                 .cmd    = ETHTOOL_MSG_LINKMODES_SET,
 846                 .flags  = GENL_UNS_ADMIN_PERM,
 847                 .doit   = ethnl_default_set_doit,
 848                 .policy = ethnl_linkmodes_set_policy,
 849                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 850         },
 851         {
 852                 .cmd    = ETHTOOL_MSG_LINKSTATE_GET,
 853                 .doit   = ethnl_default_doit,
 854                 .start  = ethnl_default_start,
 855                 .dumpit = ethnl_default_dumpit,
 856                 .done   = ethnl_default_done,
 857                 .policy = ethnl_linkstate_get_policy,
 858                 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 859         },
 860         {
 861                 .cmd    = ETHTOOL_MSG_DEBUG_GET,
 862                 .doit   = ethnl_default_doit,
 863                 .start  = ethnl_default_start,
 864                 .dumpit = ethnl_default_dumpit,
 865                 .done   = ethnl_default_done,
 866                 .policy = ethnl_debug_get_policy,
 867                 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 868         },
 869         {
 870                 .cmd    = ETHTOOL_MSG_DEBUG_SET,
 871                 .flags  = GENL_UNS_ADMIN_PERM,
 872                 .doit   = ethnl_default_set_doit,
 873                 .policy = ethnl_debug_set_policy,
 874                 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 875         },
 876         {
 877                 .cmd    = ETHTOOL_MSG_WOL_GET,
 878                 .flags  = GENL_UNS_ADMIN_PERM,
 879                 .doit   = ethnl_default_doit,
 880                 .start  = ethnl_default_start,
 881                 .dumpit = ethnl_default_dumpit,
 882                 .done   = ethnl_default_done,
 883                 .policy = ethnl_wol_get_policy,
 884                 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 885         },
 886         {
 887                 .cmd    = ETHTOOL_MSG_WOL_SET,
 888                 .flags  = GENL_UNS_ADMIN_PERM,
 889                 .doit   = ethnl_default_set_doit,
 890                 .policy = ethnl_wol_set_policy,
 891                 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 892         },
 893         {
 894                 .cmd    = ETHTOOL_MSG_FEATURES_GET,
 895                 .doit   = ethnl_default_doit,
 896                 .start  = ethnl_default_start,
 897                 .dumpit = ethnl_default_dumpit,
 898                 .done   = ethnl_default_done,
 899                 .policy = ethnl_features_get_policy,
 900                 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 901         },
 902         {
 903                 .cmd    = ETHTOOL_MSG_FEATURES_SET,
 904                 .flags  = GENL_UNS_ADMIN_PERM,
 905                 .doit   = ethnl_set_features,
 906                 .policy = ethnl_features_set_policy,
 907                 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 908         },
 909         {
 910                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_GET,
 911                 .doit   = ethnl_default_doit,
 912                 .start  = ethnl_default_start,
 913                 .dumpit = ethnl_default_dumpit,
 914                 .done   = ethnl_default_done,
 915                 .policy = ethnl_privflags_get_policy,
 916                 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 917         },
 918         {
 919                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_SET,
 920                 .flags  = GENL_UNS_ADMIN_PERM,
 921                 .doit   = ethnl_default_set_doit,
 922                 .policy = ethnl_privflags_set_policy,
 923                 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 924         },
 925         {
 926                 .cmd    = ETHTOOL_MSG_RINGS_GET,
 927                 .doit   = ethnl_default_doit,
 928                 .start  = ethnl_default_start,
 929                 .dumpit = ethnl_default_dumpit,
 930                 .done   = ethnl_default_done,
 931                 .policy = ethnl_rings_get_policy,
 932                 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
 933         },
 934         {
 935                 .cmd    = ETHTOOL_MSG_RINGS_SET,
 936                 .flags  = GENL_UNS_ADMIN_PERM,
 937                 .doit   = ethnl_default_set_doit,
 938                 .policy = ethnl_rings_set_policy,
 939                 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
 940         },
 941         {
 942                 .cmd    = ETHTOOL_MSG_CHANNELS_GET,
 943                 .doit   = ethnl_default_doit,
 944                 .start  = ethnl_default_start,
 945                 .dumpit = ethnl_default_dumpit,
 946                 .done   = ethnl_default_done,
 947                 .policy = ethnl_channels_get_policy,
 948                 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
 949         },
 950         {
 951                 .cmd    = ETHTOOL_MSG_CHANNELS_SET,
 952                 .flags  = GENL_UNS_ADMIN_PERM,
 953                 .doit   = ethnl_default_set_doit,
 954                 .policy = ethnl_channels_set_policy,
 955                 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
 956         },
 957         {
 958                 .cmd    = ETHTOOL_MSG_COALESCE_GET,
 959                 .doit   = ethnl_default_doit,
 960                 .start  = ethnl_default_start,
 961                 .dumpit = ethnl_default_dumpit,
 962                 .done   = ethnl_default_done,
 963                 .policy = ethnl_coalesce_get_policy,
 964                 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
 965         },
 966         {
 967                 .cmd    = ETHTOOL_MSG_COALESCE_SET,
 968                 .flags  = GENL_UNS_ADMIN_PERM,
 969                 .doit   = ethnl_default_set_doit,
 970                 .policy = ethnl_coalesce_set_policy,
 971                 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
 972         },
 973         {
 974                 .cmd    = ETHTOOL_MSG_PAUSE_GET,
 975                 .doit   = ethnl_default_doit,
 976                 .start  = ethnl_default_start,
 977                 .dumpit = ethnl_default_dumpit,
 978                 .done   = ethnl_default_done,
 979                 .policy = ethnl_pause_get_policy,
 980                 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
 981         },
 982         {
 983                 .cmd    = ETHTOOL_MSG_PAUSE_SET,
 984                 .flags  = GENL_UNS_ADMIN_PERM,
 985                 .doit   = ethnl_default_set_doit,
 986                 .policy = ethnl_pause_set_policy,
 987                 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
 988         },
 989         {
 990                 .cmd    = ETHTOOL_MSG_EEE_GET,
 991                 .doit   = ethnl_default_doit,
 992                 .start  = ethnl_default_start,
 993                 .dumpit = ethnl_default_dumpit,
 994                 .done   = ethnl_default_done,
 995                 .policy = ethnl_eee_get_policy,
 996                 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
 997         },
 998         {
 999                 .cmd    = ETHTOOL_MSG_EEE_SET,
1000                 .flags  = GENL_UNS_ADMIN_PERM,
1001                 .doit   = ethnl_default_set_doit,
1002                 .policy = ethnl_eee_set_policy,
1003                 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
1004         },
1005         {
1006                 .cmd    = ETHTOOL_MSG_TSINFO_GET,
1007                 .doit   = ethnl_default_doit,
1008                 .start  = ethnl_default_start,
1009                 .dumpit = ethnl_default_dumpit,
1010                 .done   = ethnl_default_done,
1011                 .policy = ethnl_tsinfo_get_policy,
1012                 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
1013         },
1014         {
1015                 .cmd    = ETHTOOL_MSG_CABLE_TEST_ACT,
1016                 .flags  = GENL_UNS_ADMIN_PERM,
1017                 .doit   = ethnl_act_cable_test,
1018                 .policy = ethnl_cable_test_act_policy,
1019                 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
1020         },
1021         {
1022                 .cmd    = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
1023                 .flags  = GENL_UNS_ADMIN_PERM,
1024                 .doit   = ethnl_act_cable_test_tdr,
1025                 .policy = ethnl_cable_test_tdr_act_policy,
1026                 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1027         },
1028         {
1029                 .cmd    = ETHTOOL_MSG_TUNNEL_INFO_GET,
1030                 .doit   = ethnl_tunnel_info_doit,
1031                 .start  = ethnl_tunnel_info_start,
1032                 .dumpit = ethnl_tunnel_info_dumpit,
1033                 .policy = ethnl_tunnel_info_get_policy,
1034                 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1035         },
1036         {
1037                 .cmd    = ETHTOOL_MSG_FEC_GET,
1038                 .doit   = ethnl_default_doit,
1039                 .start  = ethnl_default_start,
1040                 .dumpit = ethnl_default_dumpit,
1041                 .done   = ethnl_default_done,
1042                 .policy = ethnl_fec_get_policy,
1043                 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1044         },
1045         {
1046                 .cmd    = ETHTOOL_MSG_FEC_SET,
1047                 .flags  = GENL_UNS_ADMIN_PERM,
1048                 .doit   = ethnl_default_set_doit,
1049                 .policy = ethnl_fec_set_policy,
1050                 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1051         },
1052         {
1053                 .cmd    = ETHTOOL_MSG_MODULE_EEPROM_GET,
1054                 .flags  = GENL_UNS_ADMIN_PERM,
1055                 .doit   = ethnl_default_doit,
1056                 .start  = ethnl_default_start,
1057                 .dumpit = ethnl_default_dumpit,
1058                 .done   = ethnl_default_done,
1059                 .policy = ethnl_module_eeprom_get_policy,
1060                 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1061         },
1062         {
1063                 .cmd    = ETHTOOL_MSG_STATS_GET,
1064                 .doit   = ethnl_default_doit,
1065                 .start  = ethnl_default_start,
1066                 .dumpit = ethnl_default_dumpit,
1067                 .done   = ethnl_default_done,
1068                 .policy = ethnl_stats_get_policy,
1069                 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1070         },
1071         {
1072                 .cmd    = ETHTOOL_MSG_PHC_VCLOCKS_GET,
1073                 .doit   = ethnl_default_doit,
1074                 .start  = ethnl_default_start,
1075                 .dumpit = ethnl_default_dumpit,
1076                 .done   = ethnl_default_done,
1077                 .policy = ethnl_phc_vclocks_get_policy,
1078                 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1079         },
1080         {
1081                 .cmd    = ETHTOOL_MSG_MODULE_GET,
1082                 .doit   = ethnl_default_doit,
1083                 .start  = ethnl_default_start,
1084                 .dumpit = ethnl_default_dumpit,
1085                 .done   = ethnl_default_done,
1086                 .policy = ethnl_module_get_policy,
1087                 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1088         },
1089         {
1090                 .cmd    = ETHTOOL_MSG_MODULE_SET,
1091                 .flags  = GENL_UNS_ADMIN_PERM,
1092                 .doit   = ethnl_default_set_doit,
1093                 .policy = ethnl_module_set_policy,
1094                 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1095         },
1096         {
1097                 .cmd    = ETHTOOL_MSG_PSE_GET,
1098                 .doit   = ethnl_default_doit,
1099                 .start  = ethnl_default_start,
1100                 .dumpit = ethnl_default_dumpit,
1101                 .done   = ethnl_default_done,
1102                 .policy = ethnl_pse_get_policy,
1103                 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1104         },
1105         {
1106                 .cmd    = ETHTOOL_MSG_PSE_SET,
1107                 .flags  = GENL_UNS_ADMIN_PERM,
1108                 .doit   = ethnl_default_set_doit,
1109                 .policy = ethnl_pse_set_policy,
1110                 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1111         },
1112         {
1113                 .cmd    = ETHTOOL_MSG_RSS_GET,
1114                 .doit   = ethnl_default_doit,
1115                 .policy = ethnl_rss_get_policy,
1116                 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1117         },
1118         {
1119                 .cmd    = ETHTOOL_MSG_PLCA_GET_CFG,
1120                 .doit   = ethnl_default_doit,
1121                 .start  = ethnl_default_start,
1122                 .dumpit = ethnl_default_dumpit,
1123                 .done   = ethnl_default_done,
1124                 .policy = ethnl_plca_get_cfg_policy,
1125                 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1126         },
1127         {
1128                 .cmd    = ETHTOOL_MSG_PLCA_SET_CFG,
1129                 .flags  = GENL_UNS_ADMIN_PERM,
1130                 .doit   = ethnl_default_set_doit,
1131                 .policy = ethnl_plca_set_cfg_policy,
1132                 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1133         },
1134         {
1135                 .cmd    = ETHTOOL_MSG_PLCA_GET_STATUS,
1136                 .doit   = ethnl_default_doit,
1137                 .start  = ethnl_default_start,
1138                 .dumpit = ethnl_default_dumpit,
1139                 .done   = ethnl_default_done,
1140                 .policy = ethnl_plca_get_status_policy,
1141                 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1142         },
1143         {
1144                 .cmd    = ETHTOOL_MSG_MM_GET,
1145                 .doit   = ethnl_default_doit,
1146                 .start  = ethnl_default_start,
1147                 .dumpit = ethnl_default_dumpit,
1148                 .done   = ethnl_default_done,
1149                 .policy = ethnl_mm_get_policy,
1150                 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1151         },
1152         {
1153                 .cmd    = ETHTOOL_MSG_MM_SET,
1154                 .flags  = GENL_UNS_ADMIN_PERM,
1155                 .doit   = ethnl_default_set_doit,
1156                 .policy = ethnl_mm_set_policy,
1157                 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1158         },
1159 };
1160
1161 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1162         [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1163 };
1164
1165 static struct genl_family ethtool_genl_family __ro_after_init = {
1166         .name           = ETHTOOL_GENL_NAME,
1167         .version        = ETHTOOL_GENL_VERSION,
1168         .netnsok        = true,
1169         .parallel_ops   = true,
1170         .ops            = ethtool_genl_ops,
1171         .n_ops          = ARRAY_SIZE(ethtool_genl_ops),
1172         .resv_start_op  = ETHTOOL_MSG_MODULE_GET + 1,
1173         .mcgrps         = ethtool_nl_mcgrps,
1174         .n_mcgrps       = ARRAY_SIZE(ethtool_nl_mcgrps),
1175 };
1176
1177 /* module setup */
1178
1179 static int __init ethnl_init(void)
1180 {
1181         int ret;
1182
1183         ret = genl_register_family(&ethtool_genl_family);
1184         if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1185                 return ret;
1186         ethnl_ok = true;
1187
1188         ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1189         WARN(ret < 0, "ethtool: net device notifier registration failed");
1190         return ret;
1191 }
1192
1193 subsys_initcall(ethnl_init);