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/phy_link_topology.h>
   6 #include <linux/pm_runtime.h>
   7 #include "netlink.h"
   8 #include "module_fw.h"
   9
  10 static struct genl_family ethtool_genl_family;
  11
  12 static bool ethnl_ok __read_mostly;
  13 static u32 ethnl_bcast_seq;
  14
  15 #define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS |     \
  16                              ETHTOOL_FLAG_OMIT_REPLY)
  17 #define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
  18
  19 const struct nla_policy ethnl_header_policy[] = {
  20         [ETHTOOL_A_HEADER_DEV_INDEX]    = { .type = NLA_U32 },
  21         [ETHTOOL_A_HEADER_DEV_NAME]     = { .type = NLA_NUL_STRING,
  22                                             .len = ALTIFNAMSIZ - 1 },
  23         [ETHTOOL_A_HEADER_FLAGS]        = NLA_POLICY_MASK(NLA_U32,
  24                                                           ETHTOOL_FLAGS_BASIC),
  25 };
  26
  27 const struct nla_policy ethnl_header_policy_stats[] = {
  28         [ETHTOOL_A_HEADER_DEV_INDEX]    = { .type = NLA_U32 },
  29         [ETHTOOL_A_HEADER_DEV_NAME]     = { .type = NLA_NUL_STRING,
  30                                             .len = ALTIFNAMSIZ - 1 },
  31         [ETHTOOL_A_HEADER_FLAGS]        = NLA_POLICY_MASK(NLA_U32,
  32                                                           ETHTOOL_FLAGS_STATS),
  33 };
  34
  35 const struct nla_policy ethnl_header_policy_phy[] = {
  36         [ETHTOOL_A_HEADER_DEV_INDEX]    = { .type = NLA_U32 },
  37         [ETHTOOL_A_HEADER_DEV_NAME]     = { .type = NLA_NUL_STRING,
  38                                             .len = ALTIFNAMSIZ - 1 },
  39         [ETHTOOL_A_HEADER_FLAGS]        = NLA_POLICY_MASK(NLA_U32,
  40                                                           ETHTOOL_FLAGS_BASIC),
  41         [ETHTOOL_A_HEADER_PHY_INDEX]            = NLA_POLICY_MIN(NLA_U32, 1),
  42 };
  43
  44 const struct nla_policy ethnl_header_policy_phy_stats[] = {
  45         [ETHTOOL_A_HEADER_DEV_INDEX]    = { .type = NLA_U32 },
  46         [ETHTOOL_A_HEADER_DEV_NAME]     = { .type = NLA_NUL_STRING,
  47                                             .len = ALTIFNAMSIZ - 1 },
  48         [ETHTOOL_A_HEADER_FLAGS]        = NLA_POLICY_MASK(NLA_U32,
  49                                                           ETHTOOL_FLAGS_STATS),
  50         [ETHTOOL_A_HEADER_PHY_INDEX]            = NLA_POLICY_MIN(NLA_U32, 1),
  51 };
  52
  53 int ethnl_sock_priv_set(struct sk_buff *skb, struct net_device *dev, u32 portid,
  54                         enum ethnl_sock_type type)
  55 {
  56         struct ethnl_sock_priv *sk_priv;
  57
  58         sk_priv = genl_sk_priv_get(&ethtool_genl_family, NETLINK_CB(skb).sk);
  59         if (IS_ERR(sk_priv))
  60                 return PTR_ERR(sk_priv);
  61
  62         sk_priv->dev = dev;
  63         sk_priv->portid = portid;
  64         sk_priv->type = type;
  65
  66         return 0;
  67 }
  68
  69 static void ethnl_sock_priv_destroy(void *priv)
  70 {
  71         struct ethnl_sock_priv *sk_priv = priv;
  72
  73         switch (sk_priv->type) {
  74         case ETHTOOL_SOCK_TYPE_MODULE_FW_FLASH:
  75                 ethnl_module_fw_flash_sock_destroy(sk_priv);
  76                 break;
  77         default:
  78                 break;
  79         }
  80 }
  81
  82 int ethnl_ops_begin(struct net_device *dev)
  83 {
  84         int ret;
  85
  86         if (!dev)
  87                 return -ENODEV;
  88
  89         if (dev->dev.parent)
  90                 pm_runtime_get_sync(dev->dev.parent);
  91
  92         if (!netif_device_present(dev) ||
  93             dev->reg_state == NETREG_UNREGISTERING) {
  94                 ret = -ENODEV;
  95                 goto err;
  96         }
  97
  98         if (dev->ethtool_ops->begin) {
  99                 ret = dev->ethtool_ops->begin(dev);
 100                 if (ret)
 101                         goto err;
 102         }
 103
 104         return 0;
 105 err:
 106         if (dev->dev.parent)
 107                 pm_runtime_put(dev->dev.parent);
 108
 109         return ret;
 110 }
 111
 112 void ethnl_ops_complete(struct net_device *dev)
 113 {
 114         if (dev->ethtool_ops->complete)
 115                 dev->ethtool_ops->complete(dev);
 116
 117         if (dev->dev.parent)
 118                 pm_runtime_put(dev->dev.parent);
 119 }
 120
 121 /**
 122  * ethnl_parse_header_dev_get() - parse request header
 123  * @req_info:    structure to put results into
 124  * @header:      nest attribute with request header
 125  * @net:         request netns
 126  * @extack:      netlink extack for error reporting
 127  * @require_dev: fail if no device identified in header
 128  *
 129  * Parse request header in nested attribute @nest and puts results into
 130  * the structure pointed to by @req_info. Extack from @info is used for error
 131  * reporting. If req_info->dev is not null on return, reference to it has
 132  * been taken. If error is returned, *req_info is null initialized and no
 133  * reference is held.
 134  *
 135  * Return: 0 on success or negative error code
 136  */
 137 int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
 138                                const struct nlattr *header, struct net *net,
 139                                struct netlink_ext_ack *extack, bool require_dev)
 140 {
 141         struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy_phy)];
 142         const struct nlattr *devname_attr;
 143         struct net_device *dev = NULL;
 144         u32 flags = 0;
 145         int ret;
 146
 147         if (!header) {
 148                 if (!require_dev)
 149                         return 0;
 150                 NL_SET_ERR_MSG(extack, "request header missing");
 151                 return -EINVAL;
 152         }
 153         /* No validation here, command policy should have a nested policy set
 154          * for the header, therefore validation should have already been done.
 155          */
 156         ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy_phy) - 1, header,
 157                                NULL, extack);
 158         if (ret < 0)
 159                 return ret;
 160         if (tb[ETHTOOL_A_HEADER_FLAGS])
 161                 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
 162
 163         devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
 164         if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
 165                 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
 166
 167                 dev = netdev_get_by_index(net, ifindex, &req_info->dev_tracker,
 168                                           GFP_KERNEL);
 169                 if (!dev) {
 170                         NL_SET_ERR_MSG_ATTR(extack,
 171                                             tb[ETHTOOL_A_HEADER_DEV_INDEX],
 172                                             "no device matches ifindex");
 173                         return -ENODEV;
 174                 }
 175                 /* if both ifindex and ifname are passed, they must match */
 176                 if (devname_attr &&
 177                     strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
 178                         netdev_put(dev, &req_info->dev_tracker);
 179                         NL_SET_ERR_MSG_ATTR(extack, header,
 180                                             "ifindex and name do not match");
 181                         return -ENODEV;
 182                 }
 183         } else if (devname_attr) {
 184                 dev = netdev_get_by_name(net, nla_data(devname_attr),
 185                                          &req_info->dev_tracker, GFP_KERNEL);
 186                 if (!dev) {
 187                         NL_SET_ERR_MSG_ATTR(extack, devname_attr,
 188                                             "no device matches name");
 189                         return -ENODEV;
 190                 }
 191         } else if (require_dev) {
 192                 NL_SET_ERR_MSG_ATTR(extack, header,
 193                                     "neither ifindex nor name specified");
 194                 return -EINVAL;
 195         }
 196
 197         if (tb[ETHTOOL_A_HEADER_PHY_INDEX]) {
 198                 if (dev) {
 199                         req_info->phy_index = nla_get_u32(tb[ETHTOOL_A_HEADER_PHY_INDEX]);
 200                 } else {
 201                         NL_SET_ERR_MSG_ATTR(extack, header,
 202                                             "phy_index set without a netdev");
 203                         return -EINVAL;
 204                 }
 205         }
 206
 207         req_info->dev = dev;
 208         req_info->flags = flags;
 209         return 0;
 210 }
 211
 212 struct phy_device *ethnl_req_get_phydev(const struct ethnl_req_info *req_info,
 213                                         const struct nlattr *header,
 214                                         struct netlink_ext_ack *extack)
 215 {
 216         struct phy_device *phydev;
 217
 218         ASSERT_RTNL();
 219
 220         if (!req_info->dev)
 221                 return NULL;
 222
 223         if (!req_info->phy_index)
 224                 return req_info->dev->phydev;
 225
 226         phydev = phy_link_topo_get_phy(req_info->dev, req_info->phy_index);
 227         if (!phydev) {
 228                 NL_SET_ERR_MSG_ATTR(extack, header,
 229                                     "no phy matching phyindex");
 230                 return ERR_PTR(-ENODEV);
 231         }
 232
 233         return phydev;
 234 }
 235
 236 /**
 237  * ethnl_fill_reply_header() - Put common header into a reply message
 238  * @skb:      skb with the message
 239  * @dev:      network device to describe in header
 240  * @attrtype: attribute type to use for the nest
 241  *
 242  * Create a nested attribute with attributes describing given network device.
 243  *
 244  * Return: 0 on success, error value (-EMSGSIZE only) on error
 245  */
 246 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
 247                             u16 attrtype)
 248 {
 249         struct nlattr *nest;
 250
 251         if (!dev)
 252                 return 0;
 253         nest = nla_nest_start(skb, attrtype);
 254         if (!nest)
 255                 return -EMSGSIZE;
 256
 257         if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
 258             nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
 259                 goto nla_put_failure;
 260         /* If more attributes are put into reply header, ethnl_header_size()
 261          * must be updated to account for them.
 262          */
 263
 264         nla_nest_end(skb, nest);
 265         return 0;
 266
 267 nla_put_failure:
 268         nla_nest_cancel(skb, nest);
 269         return -EMSGSIZE;
 270 }
 271
 272 /**
 273  * ethnl_reply_init() - Create skb for a reply and fill device identification
 274  * @payload:      payload length (without netlink and genetlink header)
 275  * @dev:          device the reply is about (may be null)
 276  * @cmd:          ETHTOOL_MSG_* message type for reply
 277  * @hdr_attrtype: attribute type for common header
 278  * @info:         genetlink info of the received packet we respond to
 279  * @ehdrp:        place to store payload pointer returned by genlmsg_new()
 280  *
 281  * Return: pointer to allocated skb on success, NULL on error
 282  */
 283 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
 284                                  u16 hdr_attrtype, struct genl_info *info,
 285                                  void **ehdrp)
 286 {
 287         struct sk_buff *skb;
 288
 289         skb = genlmsg_new(payload, GFP_KERNEL);
 290         if (!skb)
 291                 goto err;
 292         *ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
 293         if (!*ehdrp)
 294                 goto err_free;
 295
 296         if (dev) {
 297                 int ret;
 298
 299                 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
 300                 if (ret < 0)
 301                         goto err_free;
 302         }
 303         return skb;
 304
 305 err_free:
 306         nlmsg_free(skb);
 307 err:
 308         if (info)
 309                 GENL_SET_ERR_MSG(info, "failed to setup reply message");
 310         return NULL;
 311 }
 312
 313 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
 314 {
 315         return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 316                            &ethtool_genl_family, 0, cmd);
 317 }
 318
 319 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
 320 {
 321         return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
 322                            cmd);
 323 }
 324
 325 void *ethnl_unicast_put(struct sk_buff *skb, u32 portid, u32 seq, u8 cmd)
 326 {
 327         return genlmsg_put(skb, portid, seq, &ethtool_genl_family, 0, cmd);
 328 }
 329
 330 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
 331 {
 332         return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
 333                                        0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
 334 }
 335
 336 /* GET request helpers */
 337
 338 /**
 339  * struct ethnl_dump_ctx - context structure for generic dumpit() callback
 340  * @ops:        request ops of currently processed message type
 341  * @req_info:   parsed request header of processed request
 342  * @reply_data: data needed to compose the reply
 343  * @pos_ifindex: saved iteration position - ifindex
 344  *
 345  * These parameters are kept in struct netlink_callback as context preserved
 346  * between iterations. They are initialized by ethnl_default_start() and used
 347  * in ethnl_default_dumpit() and ethnl_default_done().
 348  */
 349 struct ethnl_dump_ctx {
 350         const struct ethnl_request_ops  *ops;
 351         struct ethnl_req_info           *req_info;
 352         struct ethnl_reply_data         *reply_data;
 353         unsigned long                   pos_ifindex;
 354 };
 355
 356 static const struct ethnl_request_ops *
 357 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
 358         [ETHTOOL_MSG_STRSET_GET]        = &ethnl_strset_request_ops,
 359         [ETHTOOL_MSG_LINKINFO_GET]      = &ethnl_linkinfo_request_ops,
 360         [ETHTOOL_MSG_LINKINFO_SET]      = &ethnl_linkinfo_request_ops,
 361         [ETHTOOL_MSG_LINKMODES_GET]     = &ethnl_linkmodes_request_ops,
 362         [ETHTOOL_MSG_LINKMODES_SET]     = &ethnl_linkmodes_request_ops,
 363         [ETHTOOL_MSG_LINKSTATE_GET]     = &ethnl_linkstate_request_ops,
 364         [ETHTOOL_MSG_DEBUG_GET]         = &ethnl_debug_request_ops,
 365         [ETHTOOL_MSG_DEBUG_SET]         = &ethnl_debug_request_ops,
 366         [ETHTOOL_MSG_WOL_GET]           = &ethnl_wol_request_ops,
 367         [ETHTOOL_MSG_WOL_SET]           = &ethnl_wol_request_ops,
 368         [ETHTOOL_MSG_FEATURES_GET]      = &ethnl_features_request_ops,
 369         [ETHTOOL_MSG_PRIVFLAGS_GET]     = &ethnl_privflags_request_ops,
 370         [ETHTOOL_MSG_PRIVFLAGS_SET]     = &ethnl_privflags_request_ops,
 371         [ETHTOOL_MSG_RINGS_GET]         = &ethnl_rings_request_ops,
 372         [ETHTOOL_MSG_RINGS_SET]         = &ethnl_rings_request_ops,
 373         [ETHTOOL_MSG_CHANNELS_GET]      = &ethnl_channels_request_ops,
 374         [ETHTOOL_MSG_CHANNELS_SET]      = &ethnl_channels_request_ops,
 375         [ETHTOOL_MSG_COALESCE_GET]      = &ethnl_coalesce_request_ops,
 376         [ETHTOOL_MSG_COALESCE_SET]      = &ethnl_coalesce_request_ops,
 377         [ETHTOOL_MSG_PAUSE_GET]         = &ethnl_pause_request_ops,
 378         [ETHTOOL_MSG_PAUSE_SET]         = &ethnl_pause_request_ops,
 379         [ETHTOOL_MSG_EEE_GET]           = &ethnl_eee_request_ops,
 380         [ETHTOOL_MSG_EEE_SET]           = &ethnl_eee_request_ops,
 381         [ETHTOOL_MSG_FEC_GET]           = &ethnl_fec_request_ops,
 382         [ETHTOOL_MSG_FEC_SET]           = &ethnl_fec_request_ops,
 383         [ETHTOOL_MSG_TSINFO_GET]        = &ethnl_tsinfo_request_ops,
 384         [ETHTOOL_MSG_MODULE_EEPROM_GET] = &ethnl_module_eeprom_request_ops,
 385         [ETHTOOL_MSG_STATS_GET]         = &ethnl_stats_request_ops,
 386         [ETHTOOL_MSG_PHC_VCLOCKS_GET]   = &ethnl_phc_vclocks_request_ops,
 387         [ETHTOOL_MSG_MODULE_GET]        = &ethnl_module_request_ops,
 388         [ETHTOOL_MSG_MODULE_SET]        = &ethnl_module_request_ops,
 389         [ETHTOOL_MSG_PSE_GET]           = &ethnl_pse_request_ops,
 390         [ETHTOOL_MSG_PSE_SET]           = &ethnl_pse_request_ops,
 391         [ETHTOOL_MSG_RSS_GET]           = &ethnl_rss_request_ops,
 392         [ETHTOOL_MSG_PLCA_GET_CFG]      = &ethnl_plca_cfg_request_ops,
 393         [ETHTOOL_MSG_PLCA_SET_CFG]      = &ethnl_plca_cfg_request_ops,
 394         [ETHTOOL_MSG_PLCA_GET_STATUS]   = &ethnl_plca_status_request_ops,
 395         [ETHTOOL_MSG_MM_GET]            = &ethnl_mm_request_ops,
 396         [ETHTOOL_MSG_MM_SET]            = &ethnl_mm_request_ops,
 397 };
 398
 399 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
 400 {
 401         return (struct ethnl_dump_ctx *)cb->ctx;
 402 }
 403
 404 /**
 405  * ethnl_default_parse() - Parse request message
 406  * @req_info:    pointer to structure to put data into
 407  * @info:        genl_info from the request
 408  * @request_ops: struct request_ops for request type
 409  * @require_dev: fail if no device identified in header
 410  *
 411  * Parse universal request header and call request specific ->parse_request()
 412  * callback (if defined) to parse the rest of the message.
 413  *
 414  * Return: 0 on success or negative error code
 415  */
 416 static int ethnl_default_parse(struct ethnl_req_info *req_info,
 417                                const struct genl_info *info,
 418                                const struct ethnl_request_ops *request_ops,
 419                                bool require_dev)
 420 {
 421         struct nlattr **tb = info->attrs;
 422         int ret;
 423
 424         ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
 425                                          genl_info_net(info), info->extack,
 426                                          require_dev);
 427         if (ret < 0)
 428                 return ret;
 429
 430         if (request_ops->parse_request) {
 431                 ret = request_ops->parse_request(req_info, tb, info->extack);
 432                 if (ret < 0)
 433                         return ret;
 434         }
 435
 436         return 0;
 437 }
 438
 439 /**
 440  * ethnl_init_reply_data() - Initialize reply data for GET request
 441  * @reply_data: pointer to embedded struct ethnl_reply_data
 442  * @ops:        instance of struct ethnl_request_ops describing the layout
 443  * @dev:        network device to initialize the reply for
 444  *
 445  * Fills the reply data part with zeros and sets the dev member. Must be called
 446  * before calling the ->fill_reply() callback (for each iteration when handling
 447  * dump requests).
 448  */
 449 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
 450                                   const struct ethnl_request_ops *ops,
 451                                   struct net_device *dev)
 452 {
 453         memset(reply_data, 0, ops->reply_data_size);
 454         reply_data->dev = dev;
 455 }
 456
 457 /* default ->doit() handler for GET type requests */
 458 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
 459 {
 460         struct ethnl_reply_data *reply_data = NULL;
 461         struct ethnl_req_info *req_info = NULL;
 462         const u8 cmd = info->genlhdr->cmd;
 463         const struct ethnl_request_ops *ops;
 464         int hdr_len, reply_len;
 465         struct sk_buff *rskb;
 466         void *reply_payload;
 467         int ret;
 468
 469         ops = ethnl_default_requests[cmd];
 470         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 471                 return -EOPNOTSUPP;
 472         if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 473                 return -EINVAL;
 474
 475         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 476         if (!req_info)
 477                 return -ENOMEM;
 478         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 479         if (!reply_data) {
 480                 kfree(req_info);
 481                 return -ENOMEM;
 482         }
 483
 484         ret = ethnl_default_parse(req_info, info, ops, !ops->allow_nodev_do);
 485         if (ret < 0)
 486                 goto err_dev;
 487         ethnl_init_reply_data(reply_data, ops, req_info->dev);
 488
 489         rtnl_lock();
 490         ret = ops->prepare_data(req_info, reply_data, info);
 491         rtnl_unlock();
 492         if (ret < 0)
 493                 goto err_cleanup;
 494         ret = ops->reply_size(req_info, reply_data);
 495         if (ret < 0)
 496                 goto err_cleanup;
 497         reply_len = ret;
 498         ret = -ENOMEM;
 499         rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
 500                                 req_info->dev, ops->reply_cmd,
 501                                 ops->hdr_attr, info, &reply_payload);
 502         if (!rskb)
 503                 goto err_cleanup;
 504         hdr_len = rskb->len;
 505         ret = ops->fill_reply(rskb, req_info, reply_data);
 506         if (ret < 0)
 507                 goto err_msg;
 508         WARN_ONCE(rskb->len - hdr_len > reply_len,
 509                   "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
 510                   cmd, reply_len, rskb->len - hdr_len);
 511         if (ops->cleanup_data)
 512                 ops->cleanup_data(reply_data);
 513
 514         genlmsg_end(rskb, reply_payload);
 515         netdev_put(req_info->dev, &req_info->dev_tracker);
 516         kfree(reply_data);
 517         kfree(req_info);
 518         return genlmsg_reply(rskb, info);
 519
 520 err_msg:
 521         WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
 522         nlmsg_free(rskb);
 523 err_cleanup:
 524         if (ops->cleanup_data)
 525                 ops->cleanup_data(reply_data);
 526 err_dev:
 527         netdev_put(req_info->dev, &req_info->dev_tracker);
 528         kfree(reply_data);
 529         kfree(req_info);
 530         return ret;
 531 }
 532
 533 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
 534                                   const struct ethnl_dump_ctx *ctx,
 535                                   const struct genl_info *info)
 536 {
 537         void *ehdr;
 538         int ret;
 539
 540         ehdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
 541                            &ethtool_genl_family, NLM_F_MULTI,
 542                            ctx->ops->reply_cmd);
 543         if (!ehdr)
 544                 return -EMSGSIZE;
 545
 546         ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
 547         rtnl_lock();
 548         ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, info);
 549         rtnl_unlock();
 550         if (ret < 0)
 551                 goto out;
 552         ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
 553         if (ret < 0)
 554                 goto out;
 555         ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
 556
 557 out:
 558         if (ctx->ops->cleanup_data)
 559                 ctx->ops->cleanup_data(ctx->reply_data);
 560         ctx->reply_data->dev = NULL;
 561         if (ret < 0)
 562                 genlmsg_cancel(skb, ehdr);
 563         else
 564                 genlmsg_end(skb, ehdr);
 565         return ret;
 566 }
 567
 568 /* Default ->dumpit() handler for GET requests. */
 569 static int ethnl_default_dumpit(struct sk_buff *skb,
 570                                 struct netlink_callback *cb)
 571 {
 572         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 573         struct net *net = sock_net(skb->sk);
 574         struct net_device *dev;
 575         int ret = 0;
 576
 577         rcu_read_lock();
 578         for_each_netdev_dump(net, dev, ctx->pos_ifindex) {
 579                 dev_hold(dev);
 580                 rcu_read_unlock();
 581
 582                 ret = ethnl_default_dump_one(skb, dev, ctx, genl_info_dump(cb));
 583
 584                 rcu_read_lock();
 585                 dev_put(dev);
 586
 587                 if (ret < 0 && ret != -EOPNOTSUPP) {
 588                         if (likely(skb->len))
 589                                 ret = skb->len;
 590                         break;
 591                 }
 592                 ret = 0;
 593         }
 594         rcu_read_unlock();
 595
 596         return ret;
 597 }
 598
 599 /* generic ->start() handler for GET requests */
 600 static int ethnl_default_start(struct netlink_callback *cb)
 601 {
 602         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 603         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 604         struct ethnl_reply_data *reply_data;
 605         const struct ethnl_request_ops *ops;
 606         struct ethnl_req_info *req_info;
 607         struct genlmsghdr *ghdr;
 608         int ret;
 609
 610         BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 611
 612         ghdr = nlmsg_data(cb->nlh);
 613         ops = ethnl_default_requests[ghdr->cmd];
 614         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
 615                 return -EOPNOTSUPP;
 616         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 617         if (!req_info)
 618                 return -ENOMEM;
 619         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 620         if (!reply_data) {
 621                 ret = -ENOMEM;
 622                 goto free_req_info;
 623         }
 624
 625         ret = ethnl_default_parse(req_info, &info->info, ops, false);
 626         if (req_info->dev) {
 627                 /* We ignore device specification in dump requests but as the
 628                  * same parser as for non-dump (doit) requests is used, it
 629                  * would take reference to the device if it finds one
 630                  */
 631                 netdev_put(req_info->dev, &req_info->dev_tracker);
 632                 req_info->dev = NULL;
 633         }
 634         if (ret < 0)
 635                 goto free_reply_data;
 636
 637         ctx->ops = ops;
 638         ctx->req_info = req_info;
 639         ctx->reply_data = reply_data;
 640         ctx->pos_ifindex = 0;
 641
 642         return 0;
 643
 644 free_reply_data:
 645         kfree(reply_data);
 646 free_req_info:
 647         kfree(req_info);
 648
 649         return ret;
 650 }
 651
 652 /* default ->done() handler for GET requests */
 653 static int ethnl_default_done(struct netlink_callback *cb)
 654 {
 655         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 656
 657         kfree(ctx->reply_data);
 658         kfree(ctx->req_info);
 659
 660         return 0;
 661 }
 662
 663 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
 664 {
 665         const struct ethnl_request_ops *ops;
 666         struct ethnl_req_info req_info = {};
 667         const u8 cmd = info->genlhdr->cmd;
 668         int ret;
 669
 670         ops = ethnl_default_requests[cmd];
 671         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 672                 return -EOPNOTSUPP;
 673         if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 674                 return -EINVAL;
 675
 676         ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
 677                                          genl_info_net(info), info->extack,
 678                                          true);
 679         if (ret < 0)
 680                 return ret;
 681
 682         if (ops->set_validate) {
 683                 ret = ops->set_validate(&req_info, info);
 684                 /* 0 means nothing to do */
 685                 if (ret <= 0)
 686                         goto out_dev;
 687         }
 688
 689         rtnl_lock();
 690         ret = ethnl_ops_begin(req_info.dev);
 691         if (ret < 0)
 692                 goto out_rtnl;
 693
 694         ret = ops->set(&req_info, info);
 695         if (ret <= 0)
 696                 goto out_ops;
 697         ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
 698
 699         ret = 0;
 700 out_ops:
 701         ethnl_ops_complete(req_info.dev);
 702 out_rtnl:
 703         rtnl_unlock();
 704 out_dev:
 705         ethnl_parse_header_dev_put(&req_info);
 706         return ret;
 707 }
 708
 709 static const struct ethnl_request_ops *
 710 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 711         [ETHTOOL_MSG_LINKINFO_NTF]      = &ethnl_linkinfo_request_ops,
 712         [ETHTOOL_MSG_LINKMODES_NTF]     = &ethnl_linkmodes_request_ops,
 713         [ETHTOOL_MSG_DEBUG_NTF]         = &ethnl_debug_request_ops,
 714         [ETHTOOL_MSG_WOL_NTF]           = &ethnl_wol_request_ops,
 715         [ETHTOOL_MSG_FEATURES_NTF]      = &ethnl_features_request_ops,
 716         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = &ethnl_privflags_request_ops,
 717         [ETHTOOL_MSG_RINGS_NTF]         = &ethnl_rings_request_ops,
 718         [ETHTOOL_MSG_CHANNELS_NTF]      = &ethnl_channels_request_ops,
 719         [ETHTOOL_MSG_COALESCE_NTF]      = &ethnl_coalesce_request_ops,
 720         [ETHTOOL_MSG_PAUSE_NTF]         = &ethnl_pause_request_ops,
 721         [ETHTOOL_MSG_EEE_NTF]           = &ethnl_eee_request_ops,
 722         [ETHTOOL_MSG_FEC_NTF]           = &ethnl_fec_request_ops,
 723         [ETHTOOL_MSG_MODULE_NTF]        = &ethnl_module_request_ops,
 724         [ETHTOOL_MSG_PLCA_NTF]          = &ethnl_plca_cfg_request_ops,
 725         [ETHTOOL_MSG_MM_NTF]            = &ethnl_mm_request_ops,
 726 };
 727
 728 /* default notification handler */
 729 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 730                                  const void *data)
 731 {
 732         struct ethnl_reply_data *reply_data;
 733         const struct ethnl_request_ops *ops;
 734         struct ethnl_req_info *req_info;
 735         struct genl_info info;
 736         struct sk_buff *skb;
 737         void *reply_payload;
 738         int reply_len;
 739         int ret;
 740
 741         genl_info_init_ntf(&info, &ethtool_genl_family, cmd);
 742
 743         if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
 744                       !ethnl_default_notify_ops[cmd],
 745                       "unexpected notification type %u\n", cmd))
 746                 return;
 747         ops = ethnl_default_notify_ops[cmd];
 748         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 749         if (!req_info)
 750                 return;
 751         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 752         if (!reply_data) {
 753                 kfree(req_info);
 754                 return;
 755         }
 756
 757         req_info->dev = dev;
 758         req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
 759
 760         ethnl_init_reply_data(reply_data, ops, dev);
 761         ret = ops->prepare_data(req_info, reply_data, &info);
 762         if (ret < 0)
 763                 goto err_cleanup;
 764         ret = ops->reply_size(req_info, reply_data);
 765         if (ret < 0)
 766                 goto err_cleanup;
 767         reply_len = ret + ethnl_reply_header_size();
 768         skb = genlmsg_new(reply_len, GFP_KERNEL);
 769         if (!skb)
 770                 goto err_cleanup;
 771         reply_payload = ethnl_bcastmsg_put(skb, cmd);
 772         if (!reply_payload)
 773                 goto err_skb;
 774         ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
 775         if (ret < 0)
 776                 goto err_msg;
 777         ret = ops->fill_reply(skb, req_info, reply_data);
 778         if (ret < 0)
 779                 goto err_msg;
 780         if (ops->cleanup_data)
 781                 ops->cleanup_data(reply_data);
 782
 783         genlmsg_end(skb, reply_payload);
 784         kfree(reply_data);
 785         kfree(req_info);
 786         ethnl_multicast(skb, dev);
 787         return;
 788
 789 err_msg:
 790         WARN_ONCE(ret == -EMSGSIZE,
 791                   "calculated message payload length (%d) not sufficient\n",
 792                   reply_len);
 793 err_skb:
 794         nlmsg_free(skb);
 795 err_cleanup:
 796         if (ops->cleanup_data)
 797                 ops->cleanup_data(reply_data);
 798         kfree(reply_data);
 799         kfree(req_info);
 800         return;
 801 }
 802
 803 /* notifications */
 804
 805 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
 806                                        const void *data);
 807
 808 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 809         [ETHTOOL_MSG_LINKINFO_NTF]      = ethnl_default_notify,
 810         [ETHTOOL_MSG_LINKMODES_NTF]     = ethnl_default_notify,
 811         [ETHTOOL_MSG_DEBUG_NTF]         = ethnl_default_notify,
 812         [ETHTOOL_MSG_WOL_NTF]           = ethnl_default_notify,
 813         [ETHTOOL_MSG_FEATURES_NTF]      = ethnl_default_notify,
 814         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = ethnl_default_notify,
 815         [ETHTOOL_MSG_RINGS_NTF]         = ethnl_default_notify,
 816         [ETHTOOL_MSG_CHANNELS_NTF]      = ethnl_default_notify,
 817         [ETHTOOL_MSG_COALESCE_NTF]      = ethnl_default_notify,
 818         [ETHTOOL_MSG_PAUSE_NTF]         = ethnl_default_notify,
 819         [ETHTOOL_MSG_EEE_NTF]           = ethnl_default_notify,
 820         [ETHTOOL_MSG_FEC_NTF]           = ethnl_default_notify,
 821         [ETHTOOL_MSG_MODULE_NTF]        = ethnl_default_notify,
 822         [ETHTOOL_MSG_PLCA_NTF]          = ethnl_default_notify,
 823         [ETHTOOL_MSG_MM_NTF]            = ethnl_default_notify,
 824 };
 825
 826 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
 827 {
 828         if (unlikely(!ethnl_ok))
 829                 return;
 830         ASSERT_RTNL();
 831
 832         if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
 833                    ethnl_notify_handlers[cmd]))
 834                 ethnl_notify_handlers[cmd](dev, cmd, data);
 835         else
 836                 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
 837                           cmd, netdev_name(dev));
 838 }
 839 EXPORT_SYMBOL(ethtool_notify);
 840
 841 static void ethnl_notify_features(struct netdev_notifier_info *info)
 842 {
 843         struct net_device *dev = netdev_notifier_info_to_dev(info);
 844
 845         ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
 846 }
 847
 848 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
 849                               void *ptr)
 850 {
 851         struct netdev_notifier_info *info = ptr;
 852         struct netlink_ext_ack *extack;
 853         struct net_device *dev;
 854
 855         dev = netdev_notifier_info_to_dev(info);
 856         extack = netdev_notifier_info_to_extack(info);
 857
 858         switch (event) {
 859         case NETDEV_FEAT_CHANGE:
 860                 ethnl_notify_features(ptr);
 861                 break;
 862         case NETDEV_PRE_UP:
 863                 if (dev->ethtool->module_fw_flash_in_progress) {
 864                         NL_SET_ERR_MSG(extack, "Can't set port up while flashing module firmware");
 865                         return NOTIFY_BAD;
 866                 }
 867         }
 868
 869         return NOTIFY_DONE;
 870 }
 871
 872 static struct notifier_block ethnl_netdev_notifier = {
 873         .notifier_call = ethnl_netdev_event,
 874 };
 875
 876 /* genetlink setup */
 877
 878 static const struct genl_ops ethtool_genl_ops[] = {
 879         {
 880                 .cmd    = ETHTOOL_MSG_STRSET_GET,
 881                 .doit   = ethnl_default_doit,
 882                 .start  = ethnl_default_start,
 883                 .dumpit = ethnl_default_dumpit,
 884                 .done   = ethnl_default_done,
 885                 .policy = ethnl_strset_get_policy,
 886                 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 887         },
 888         {
 889                 .cmd    = ETHTOOL_MSG_LINKINFO_GET,
 890                 .doit   = ethnl_default_doit,
 891                 .start  = ethnl_default_start,
 892                 .dumpit = ethnl_default_dumpit,
 893                 .done   = ethnl_default_done,
 894                 .policy = ethnl_linkinfo_get_policy,
 895                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 896         },
 897         {
 898                 .cmd    = ETHTOOL_MSG_LINKINFO_SET,
 899                 .flags  = GENL_UNS_ADMIN_PERM,
 900                 .doit   = ethnl_default_set_doit,
 901                 .policy = ethnl_linkinfo_set_policy,
 902                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 903         },
 904         {
 905                 .cmd    = ETHTOOL_MSG_LINKMODES_GET,
 906                 .doit   = ethnl_default_doit,
 907                 .start  = ethnl_default_start,
 908                 .dumpit = ethnl_default_dumpit,
 909                 .done   = ethnl_default_done,
 910                 .policy = ethnl_linkmodes_get_policy,
 911                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 912         },
 913         {
 914                 .cmd    = ETHTOOL_MSG_LINKMODES_SET,
 915                 .flags  = GENL_UNS_ADMIN_PERM,
 916                 .doit   = ethnl_default_set_doit,
 917                 .policy = ethnl_linkmodes_set_policy,
 918                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 919         },
 920         {
 921                 .cmd    = ETHTOOL_MSG_LINKSTATE_GET,
 922                 .doit   = ethnl_default_doit,
 923                 .start  = ethnl_default_start,
 924                 .dumpit = ethnl_default_dumpit,
 925                 .done   = ethnl_default_done,
 926                 .policy = ethnl_linkstate_get_policy,
 927                 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 928         },
 929         {
 930                 .cmd    = ETHTOOL_MSG_DEBUG_GET,
 931                 .doit   = ethnl_default_doit,
 932                 .start  = ethnl_default_start,
 933                 .dumpit = ethnl_default_dumpit,
 934                 .done   = ethnl_default_done,
 935                 .policy = ethnl_debug_get_policy,
 936                 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 937         },
 938         {
 939                 .cmd    = ETHTOOL_MSG_DEBUG_SET,
 940                 .flags  = GENL_UNS_ADMIN_PERM,
 941                 .doit   = ethnl_default_set_doit,
 942                 .policy = ethnl_debug_set_policy,
 943                 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 944         },
 945         {
 946                 .cmd    = ETHTOOL_MSG_WOL_GET,
 947                 .flags  = GENL_UNS_ADMIN_PERM,
 948                 .doit   = ethnl_default_doit,
 949                 .start  = ethnl_default_start,
 950                 .dumpit = ethnl_default_dumpit,
 951                 .done   = ethnl_default_done,
 952                 .policy = ethnl_wol_get_policy,
 953                 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 954         },
 955         {
 956                 .cmd    = ETHTOOL_MSG_WOL_SET,
 957                 .flags  = GENL_UNS_ADMIN_PERM,
 958                 .doit   = ethnl_default_set_doit,
 959                 .policy = ethnl_wol_set_policy,
 960                 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 961         },
 962         {
 963                 .cmd    = ETHTOOL_MSG_FEATURES_GET,
 964                 .doit   = ethnl_default_doit,
 965                 .start  = ethnl_default_start,
 966                 .dumpit = ethnl_default_dumpit,
 967                 .done   = ethnl_default_done,
 968                 .policy = ethnl_features_get_policy,
 969                 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 970         },
 971         {
 972                 .cmd    = ETHTOOL_MSG_FEATURES_SET,
 973                 .flags  = GENL_UNS_ADMIN_PERM,
 974                 .doit   = ethnl_set_features,
 975                 .policy = ethnl_features_set_policy,
 976                 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 977         },
 978         {
 979                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_GET,
 980                 .doit   = ethnl_default_doit,
 981                 .start  = ethnl_default_start,
 982                 .dumpit = ethnl_default_dumpit,
 983                 .done   = ethnl_default_done,
 984                 .policy = ethnl_privflags_get_policy,
 985                 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 986         },
 987         {
 988                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_SET,
 989                 .flags  = GENL_UNS_ADMIN_PERM,
 990                 .doit   = ethnl_default_set_doit,
 991                 .policy = ethnl_privflags_set_policy,
 992                 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 993         },
 994         {
 995                 .cmd    = ETHTOOL_MSG_RINGS_GET,
 996                 .doit   = ethnl_default_doit,
 997                 .start  = ethnl_default_start,
 998                 .dumpit = ethnl_default_dumpit,
 999                 .done   = ethnl_default_done,
1000                 .policy = ethnl_rings_get_policy,
1001                 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
1002         },
1003         {
1004                 .cmd    = ETHTOOL_MSG_RINGS_SET,
1005                 .flags  = GENL_UNS_ADMIN_PERM,
1006                 .doit   = ethnl_default_set_doit,
1007                 .policy = ethnl_rings_set_policy,
1008                 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
1009         },
1010         {
1011                 .cmd    = ETHTOOL_MSG_CHANNELS_GET,
1012                 .doit   = ethnl_default_doit,
1013                 .start  = ethnl_default_start,
1014                 .dumpit = ethnl_default_dumpit,
1015                 .done   = ethnl_default_done,
1016                 .policy = ethnl_channels_get_policy,
1017                 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
1018         },
1019         {
1020                 .cmd    = ETHTOOL_MSG_CHANNELS_SET,
1021                 .flags  = GENL_UNS_ADMIN_PERM,
1022                 .doit   = ethnl_default_set_doit,
1023                 .policy = ethnl_channels_set_policy,
1024                 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
1025         },
1026         {
1027                 .cmd    = ETHTOOL_MSG_COALESCE_GET,
1028                 .doit   = ethnl_default_doit,
1029                 .start  = ethnl_default_start,
1030                 .dumpit = ethnl_default_dumpit,
1031                 .done   = ethnl_default_done,
1032                 .policy = ethnl_coalesce_get_policy,
1033                 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
1034         },
1035         {
1036                 .cmd    = ETHTOOL_MSG_COALESCE_SET,
1037                 .flags  = GENL_UNS_ADMIN_PERM,
1038                 .doit   = ethnl_default_set_doit,
1039                 .policy = ethnl_coalesce_set_policy,
1040                 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
1041         },
1042         {
1043                 .cmd    = ETHTOOL_MSG_PAUSE_GET,
1044                 .doit   = ethnl_default_doit,
1045                 .start  = ethnl_default_start,
1046                 .dumpit = ethnl_default_dumpit,
1047                 .done   = ethnl_default_done,
1048                 .policy = ethnl_pause_get_policy,
1049                 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
1050         },
1051         {
1052                 .cmd    = ETHTOOL_MSG_PAUSE_SET,
1053                 .flags  = GENL_UNS_ADMIN_PERM,
1054                 .doit   = ethnl_default_set_doit,
1055                 .policy = ethnl_pause_set_policy,
1056                 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
1057         },
1058         {
1059                 .cmd    = ETHTOOL_MSG_EEE_GET,
1060                 .doit   = ethnl_default_doit,
1061                 .start  = ethnl_default_start,
1062                 .dumpit = ethnl_default_dumpit,
1063                 .done   = ethnl_default_done,
1064                 .policy = ethnl_eee_get_policy,
1065                 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
1066         },
1067         {
1068                 .cmd    = ETHTOOL_MSG_EEE_SET,
1069                 .flags  = GENL_UNS_ADMIN_PERM,
1070                 .doit   = ethnl_default_set_doit,
1071                 .policy = ethnl_eee_set_policy,
1072                 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
1073         },
1074         {
1075                 .cmd    = ETHTOOL_MSG_TSINFO_GET,
1076                 .doit   = ethnl_default_doit,
1077                 .start  = ethnl_default_start,
1078                 .dumpit = ethnl_default_dumpit,
1079                 .done   = ethnl_default_done,
1080                 .policy = ethnl_tsinfo_get_policy,
1081                 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
1082         },
1083         {
1084                 .cmd    = ETHTOOL_MSG_CABLE_TEST_ACT,
1085                 .flags  = GENL_UNS_ADMIN_PERM,
1086                 .doit   = ethnl_act_cable_test,
1087                 .policy = ethnl_cable_test_act_policy,
1088                 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
1089         },
1090         {
1091                 .cmd    = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
1092                 .flags  = GENL_UNS_ADMIN_PERM,
1093                 .doit   = ethnl_act_cable_test_tdr,
1094                 .policy = ethnl_cable_test_tdr_act_policy,
1095                 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1096         },
1097         {
1098                 .cmd    = ETHTOOL_MSG_TUNNEL_INFO_GET,
1099                 .doit   = ethnl_tunnel_info_doit,
1100                 .start  = ethnl_tunnel_info_start,
1101                 .dumpit = ethnl_tunnel_info_dumpit,
1102                 .policy = ethnl_tunnel_info_get_policy,
1103                 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1104         },
1105         {
1106                 .cmd    = ETHTOOL_MSG_FEC_GET,
1107                 .doit   = ethnl_default_doit,
1108                 .start  = ethnl_default_start,
1109                 .dumpit = ethnl_default_dumpit,
1110                 .done   = ethnl_default_done,
1111                 .policy = ethnl_fec_get_policy,
1112                 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1113         },
1114         {
1115                 .cmd    = ETHTOOL_MSG_FEC_SET,
1116                 .flags  = GENL_UNS_ADMIN_PERM,
1117                 .doit   = ethnl_default_set_doit,
1118                 .policy = ethnl_fec_set_policy,
1119                 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1120         },
1121         {
1122                 .cmd    = ETHTOOL_MSG_MODULE_EEPROM_GET,
1123                 .flags  = GENL_UNS_ADMIN_PERM,
1124                 .doit   = ethnl_default_doit,
1125                 .start  = ethnl_default_start,
1126                 .dumpit = ethnl_default_dumpit,
1127                 .done   = ethnl_default_done,
1128                 .policy = ethnl_module_eeprom_get_policy,
1129                 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1130         },
1131         {
1132                 .cmd    = ETHTOOL_MSG_STATS_GET,
1133                 .doit   = ethnl_default_doit,
1134                 .start  = ethnl_default_start,
1135                 .dumpit = ethnl_default_dumpit,
1136                 .done   = ethnl_default_done,
1137                 .policy = ethnl_stats_get_policy,
1138                 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1139         },
1140         {
1141                 .cmd    = ETHTOOL_MSG_PHC_VCLOCKS_GET,
1142                 .doit   = ethnl_default_doit,
1143                 .start  = ethnl_default_start,
1144                 .dumpit = ethnl_default_dumpit,
1145                 .done   = ethnl_default_done,
1146                 .policy = ethnl_phc_vclocks_get_policy,
1147                 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1148         },
1149         {
1150                 .cmd    = ETHTOOL_MSG_MODULE_GET,
1151                 .doit   = ethnl_default_doit,
1152                 .start  = ethnl_default_start,
1153                 .dumpit = ethnl_default_dumpit,
1154                 .done   = ethnl_default_done,
1155                 .policy = ethnl_module_get_policy,
1156                 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1157         },
1158         {
1159                 .cmd    = ETHTOOL_MSG_MODULE_SET,
1160                 .flags  = GENL_UNS_ADMIN_PERM,
1161                 .doit   = ethnl_default_set_doit,
1162                 .policy = ethnl_module_set_policy,
1163                 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1164         },
1165         {
1166                 .cmd    = ETHTOOL_MSG_PSE_GET,
1167                 .doit   = ethnl_default_doit,
1168                 .start  = ethnl_default_start,
1169                 .dumpit = ethnl_default_dumpit,
1170                 .done   = ethnl_default_done,
1171                 .policy = ethnl_pse_get_policy,
1172                 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1173         },
1174         {
1175                 .cmd    = ETHTOOL_MSG_PSE_SET,
1176                 .flags  = GENL_UNS_ADMIN_PERM,
1177                 .doit   = ethnl_default_set_doit,
1178                 .policy = ethnl_pse_set_policy,
1179                 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1180         },
1181         {
1182                 .cmd    = ETHTOOL_MSG_RSS_GET,
1183                 .doit   = ethnl_default_doit,
1184                 .start  = ethnl_rss_dump_start,
1185                 .dumpit = ethnl_rss_dumpit,
1186                 .policy = ethnl_rss_get_policy,
1187                 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1188         },
1189         {
1190                 .cmd    = ETHTOOL_MSG_PLCA_GET_CFG,
1191                 .doit   = ethnl_default_doit,
1192                 .start  = ethnl_default_start,
1193                 .dumpit = ethnl_default_dumpit,
1194                 .done   = ethnl_default_done,
1195                 .policy = ethnl_plca_get_cfg_policy,
1196                 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1197         },
1198         {
1199                 .cmd    = ETHTOOL_MSG_PLCA_SET_CFG,
1200                 .flags  = GENL_UNS_ADMIN_PERM,
1201                 .doit   = ethnl_default_set_doit,
1202                 .policy = ethnl_plca_set_cfg_policy,
1203                 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1204         },
1205         {
1206                 .cmd    = ETHTOOL_MSG_PLCA_GET_STATUS,
1207                 .doit   = ethnl_default_doit,
1208                 .start  = ethnl_default_start,
1209                 .dumpit = ethnl_default_dumpit,
1210                 .done   = ethnl_default_done,
1211                 .policy = ethnl_plca_get_status_policy,
1212                 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1213         },
1214         {
1215                 .cmd    = ETHTOOL_MSG_MM_GET,
1216                 .doit   = ethnl_default_doit,
1217                 .start  = ethnl_default_start,
1218                 .dumpit = ethnl_default_dumpit,
1219                 .done   = ethnl_default_done,
1220                 .policy = ethnl_mm_get_policy,
1221                 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1222         },
1223         {
1224                 .cmd    = ETHTOOL_MSG_MM_SET,
1225                 .flags  = GENL_UNS_ADMIN_PERM,
1226                 .doit   = ethnl_default_set_doit,
1227                 .policy = ethnl_mm_set_policy,
1228                 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1229         },
1230         {
1231                 .cmd    = ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
1232                 .flags  = GENL_UNS_ADMIN_PERM,
1233                 .doit   = ethnl_act_module_fw_flash,
1234                 .policy = ethnl_module_fw_flash_act_policy,
1235                 .maxattr = ARRAY_SIZE(ethnl_module_fw_flash_act_policy) - 1,
1236         },
1237         {
1238                 .cmd    = ETHTOOL_MSG_PHY_GET,
1239                 .doit   = ethnl_phy_doit,
1240                 .start  = ethnl_phy_start,
1241                 .dumpit = ethnl_phy_dumpit,
1242                 .done   = ethnl_phy_done,
1243                 .policy = ethnl_phy_get_policy,
1244                 .maxattr = ARRAY_SIZE(ethnl_phy_get_policy) - 1,
1245         },
1246 };
1247
1248 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1249         [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1250 };
1251
1252 static struct genl_family ethtool_genl_family __ro_after_init = {
1253         .name           = ETHTOOL_GENL_NAME,
1254         .version        = ETHTOOL_GENL_VERSION,
1255         .netnsok        = true,
1256         .parallel_ops   = true,
1257         .ops            = ethtool_genl_ops,
1258         .n_ops          = ARRAY_SIZE(ethtool_genl_ops),
1259         .resv_start_op  = ETHTOOL_MSG_MODULE_GET + 1,
1260         .mcgrps         = ethtool_nl_mcgrps,
1261         .n_mcgrps       = ARRAY_SIZE(ethtool_nl_mcgrps),
1262         .sock_priv_size         = sizeof(struct ethnl_sock_priv),
1263         .sock_priv_destroy      = ethnl_sock_priv_destroy,
1264 };
1265
1266 /* module setup */
1267
1268 static int __init ethnl_init(void)
1269 {
1270         int ret;
1271
1272         ret = genl_register_family(&ethtool_genl_family);
1273         if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1274                 return ret;
1275         ethnl_ok = true;
1276
1277         ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1278         WARN(ret < 0, "ethtool: net device notifier registration failed");
1279         return ret;
1280 }
1281
1282 subsys_initcall(ethnl_init);