net/ethtool/netlink.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 #include <net/sock.h>
   4 #include <linux/ethtool_netlink.h>
   5 #include <linux/pm_runtime.h>
   6 #include "netlink.h"
   7
   8 static struct genl_family ethtool_genl_family;
   9
  10 static bool ethnl_ok __read_mostly;
  11 static u32 ethnl_bcast_seq;
  12
  13 #define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS |     \
  14                              ETHTOOL_FLAG_OMIT_REPLY)
  15 #define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
  16
  17 const struct nla_policy ethnl_header_policy[] = {
  18         [ETHTOOL_A_HEADER_DEV_INDEX]    = { .type = NLA_U32 },
  19         [ETHTOOL_A_HEADER_DEV_NAME]     = { .type = NLA_NUL_STRING,
  20                                             .len = ALTIFNAMSIZ - 1 },
  21         [ETHTOOL_A_HEADER_FLAGS]        = NLA_POLICY_MASK(NLA_U32,
  22                                                           ETHTOOL_FLAGS_BASIC),
  23 };
  24
  25 const struct nla_policy ethnl_header_policy_stats[] = {
  26         [ETHTOOL_A_HEADER_DEV_INDEX]    = { .type = NLA_U32 },
  27         [ETHTOOL_A_HEADER_DEV_NAME]     = { .type = NLA_NUL_STRING,
  28                                             .len = ALTIFNAMSIZ - 1 },
  29         [ETHTOOL_A_HEADER_FLAGS]        = NLA_POLICY_MASK(NLA_U32,
  30                                                           ETHTOOL_FLAGS_STATS),
  31 };
  32
  33 int ethnl_ops_begin(struct net_device *dev)
  34 {
  35         int ret;
  36
  37         if (!dev)
  38                 return -ENODEV;
  39
  40         if (dev->dev.parent)
  41                 pm_runtime_get_sync(dev->dev.parent);
  42
  43         if (!netif_device_present(dev) ||
  44             dev->reg_state == NETREG_UNREGISTERING) {
  45                 ret = -ENODEV;
  46                 goto err;
  47         }
  48
  49         if (dev->ethtool_ops->begin) {
  50                 ret = dev->ethtool_ops->begin(dev);
  51                 if (ret)
  52                         goto err;
  53         }
  54
  55         return 0;
  56 err:
  57         if (dev->dev.parent)
  58                 pm_runtime_put(dev->dev.parent);
  59
  60         return ret;
  61 }
  62
  63 void ethnl_ops_complete(struct net_device *dev)
  64 {
  65         if (dev->ethtool_ops->complete)
  66                 dev->ethtool_ops->complete(dev);
  67
  68         if (dev->dev.parent)
  69                 pm_runtime_put(dev->dev.parent);
  70 }
  71
  72 /**
  73  * ethnl_parse_header_dev_get() - parse request header
  74  * @req_info:    structure to put results into
  75  * @header:      nest attribute with request header
  76  * @net:         request netns
  77  * @extack:      netlink extack for error reporting
  78  * @require_dev: fail if no device identified in header
  79  *
  80  * Parse request header in nested attribute @nest and puts results into
  81  * the structure pointed to by @req_info. Extack from @info is used for error
  82  * reporting. If req_info->dev is not null on return, reference to it has
  83  * been taken. If error is returned, *req_info is null initialized and no
  84  * reference is held.
  85  *
  86  * Return: 0 on success or negative error code
  87  */
  88 int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
  89                                const struct nlattr *header, struct net *net,
  90                                struct netlink_ext_ack *extack, bool require_dev)
  91 {
  92         struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)];
  93         const struct nlattr *devname_attr;
  94         struct net_device *dev = NULL;
  95         u32 flags = 0;
  96         int ret;
  97
  98         if (!header) {
  99                 if (!require_dev)
 100                         return 0;
 101                 NL_SET_ERR_MSG(extack, "request header missing");
 102                 return -EINVAL;
 103         }
 104         /* No validation here, command policy should have a nested policy set
 105          * for the header, therefore validation should have already been done.
 106          */
 107         ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
 108                                NULL, extack);
 109         if (ret < 0)
 110                 return ret;
 111         if (tb[ETHTOOL_A_HEADER_FLAGS])
 112                 flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
 113
 114         devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
 115         if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
 116                 u32 ifindex = nla_get_u32(tb[ETHTOOL_A_HEADER_DEV_INDEX]);
 117
 118                 dev = netdev_get_by_index(net, ifindex, &req_info->dev_tracker,
 119                                           GFP_KERNEL);
 120                 if (!dev) {
 121                         NL_SET_ERR_MSG_ATTR(extack,
 122                                             tb[ETHTOOL_A_HEADER_DEV_INDEX],
 123                                             "no device matches ifindex");
 124                         return -ENODEV;
 125                 }
 126                 /* if both ifindex and ifname are passed, they must match */
 127                 if (devname_attr &&
 128                     strncmp(dev->name, nla_data(devname_attr), IFNAMSIZ)) {
 129                         netdev_put(dev, &req_info->dev_tracker);
 130                         NL_SET_ERR_MSG_ATTR(extack, header,
 131                                             "ifindex and name do not match");
 132                         return -ENODEV;
 133                 }
 134         } else if (devname_attr) {
 135                 dev = netdev_get_by_name(net, nla_data(devname_attr),
 136                                          &req_info->dev_tracker, GFP_KERNEL);
 137                 if (!dev) {
 138                         NL_SET_ERR_MSG_ATTR(extack, devname_attr,
 139                                             "no device matches name");
 140                         return -ENODEV;
 141                 }
 142         } else if (require_dev) {
 143                 NL_SET_ERR_MSG_ATTR(extack, header,
 144                                     "neither ifindex nor name specified");
 145                 return -EINVAL;
 146         }
 147
 148         req_info->dev = dev;
 149         req_info->flags = flags;
 150         return 0;
 151 }
 152
 153 /**
 154  * ethnl_fill_reply_header() - Put common header into a reply message
 155  * @skb:      skb with the message
 156  * @dev:      network device to describe in header
 157  * @attrtype: attribute type to use for the nest
 158  *
 159  * Create a nested attribute with attributes describing given network device.
 160  *
 161  * Return: 0 on success, error value (-EMSGSIZE only) on error
 162  */
 163 int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
 164                             u16 attrtype)
 165 {
 166         struct nlattr *nest;
 167
 168         if (!dev)
 169                 return 0;
 170         nest = nla_nest_start(skb, attrtype);
 171         if (!nest)
 172                 return -EMSGSIZE;
 173
 174         if (nla_put_u32(skb, ETHTOOL_A_HEADER_DEV_INDEX, (u32)dev->ifindex) ||
 175             nla_put_string(skb, ETHTOOL_A_HEADER_DEV_NAME, dev->name))
 176                 goto nla_put_failure;
 177         /* If more attributes are put into reply header, ethnl_header_size()
 178          * must be updated to account for them.
 179          */
 180
 181         nla_nest_end(skb, nest);
 182         return 0;
 183
 184 nla_put_failure:
 185         nla_nest_cancel(skb, nest);
 186         return -EMSGSIZE;
 187 }
 188
 189 /**
 190  * ethnl_reply_init() - Create skb for a reply and fill device identification
 191  * @payload:      payload length (without netlink and genetlink header)
 192  * @dev:          device the reply is about (may be null)
 193  * @cmd:          ETHTOOL_MSG_* message type for reply
 194  * @hdr_attrtype: attribute type for common header
 195  * @info:         genetlink info of the received packet we respond to
 196  * @ehdrp:        place to store payload pointer returned by genlmsg_new()
 197  *
 198  * Return: pointer to allocated skb on success, NULL on error
 199  */
 200 struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
 201                                  u16 hdr_attrtype, struct genl_info *info,
 202                                  void **ehdrp)
 203 {
 204         struct sk_buff *skb;
 205
 206         skb = genlmsg_new(payload, GFP_KERNEL);
 207         if (!skb)
 208                 goto err;
 209         *ehdrp = genlmsg_put_reply(skb, info, &ethtool_genl_family, 0, cmd);
 210         if (!*ehdrp)
 211                 goto err_free;
 212
 213         if (dev) {
 214                 int ret;
 215
 216                 ret = ethnl_fill_reply_header(skb, dev, hdr_attrtype);
 217                 if (ret < 0)
 218                         goto err_free;
 219         }
 220         return skb;
 221
 222 err_free:
 223         nlmsg_free(skb);
 224 err:
 225         if (info)
 226                 GENL_SET_ERR_MSG(info, "failed to setup reply message");
 227         return NULL;
 228 }
 229
 230 void *ethnl_dump_put(struct sk_buff *skb, struct netlink_callback *cb, u8 cmd)
 231 {
 232         return genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 233                            &ethtool_genl_family, 0, cmd);
 234 }
 235
 236 void *ethnl_bcastmsg_put(struct sk_buff *skb, u8 cmd)
 237 {
 238         return genlmsg_put(skb, 0, ++ethnl_bcast_seq, &ethtool_genl_family, 0,
 239                            cmd);
 240 }
 241
 242 int ethnl_multicast(struct sk_buff *skb, struct net_device *dev)
 243 {
 244         return genlmsg_multicast_netns(&ethtool_genl_family, dev_net(dev), skb,
 245                                        0, ETHNL_MCGRP_MONITOR, GFP_KERNEL);
 246 }
 247
 248 /* GET request helpers */
 249
 250 /**
 251  * struct ethnl_dump_ctx - context structure for generic dumpit() callback
 252  * @ops:        request ops of currently processed message type
 253  * @req_info:   parsed request header of processed request
 254  * @reply_data: data needed to compose the reply
 255  * @pos_hash:   saved iteration position - hashbucket
 256  * @pos_idx:    saved iteration position - index
 257  *
 258  * These parameters are kept in struct netlink_callback as context preserved
 259  * between iterations. They are initialized by ethnl_default_start() and used
 260  * in ethnl_default_dumpit() and ethnl_default_done().
 261  */
 262 struct ethnl_dump_ctx {
 263         const struct ethnl_request_ops  *ops;
 264         struct ethnl_req_info           *req_info;
 265         struct ethnl_reply_data         *reply_data;
 266         int                             pos_hash;
 267         int                             pos_idx;
 268 };
 269
 270 static const struct ethnl_request_ops *
 271 ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
 272         [ETHTOOL_MSG_STRSET_GET]        = &ethnl_strset_request_ops,
 273         [ETHTOOL_MSG_LINKINFO_GET]      = &ethnl_linkinfo_request_ops,
 274         [ETHTOOL_MSG_LINKINFO_SET]      = &ethnl_linkinfo_request_ops,
 275         [ETHTOOL_MSG_LINKMODES_GET]     = &ethnl_linkmodes_request_ops,
 276         [ETHTOOL_MSG_LINKMODES_SET]     = &ethnl_linkmodes_request_ops,
 277         [ETHTOOL_MSG_LINKSTATE_GET]     = &ethnl_linkstate_request_ops,
 278         [ETHTOOL_MSG_DEBUG_GET]         = &ethnl_debug_request_ops,
 279         [ETHTOOL_MSG_DEBUG_SET]         = &ethnl_debug_request_ops,
 280         [ETHTOOL_MSG_WOL_GET]           = &ethnl_wol_request_ops,
 281         [ETHTOOL_MSG_WOL_SET]           = &ethnl_wol_request_ops,
 282         [ETHTOOL_MSG_FEATURES_GET]      = &ethnl_features_request_ops,
 283         [ETHTOOL_MSG_PRIVFLAGS_GET]     = &ethnl_privflags_request_ops,
 284         [ETHTOOL_MSG_PRIVFLAGS_SET]     = &ethnl_privflags_request_ops,
 285         [ETHTOOL_MSG_RINGS_GET]         = &ethnl_rings_request_ops,
 286         [ETHTOOL_MSG_RINGS_SET]         = &ethnl_rings_request_ops,
 287         [ETHTOOL_MSG_CHANNELS_GET]      = &ethnl_channels_request_ops,
 288         [ETHTOOL_MSG_CHANNELS_SET]      = &ethnl_channels_request_ops,
 289         [ETHTOOL_MSG_COALESCE_GET]      = &ethnl_coalesce_request_ops,
 290         [ETHTOOL_MSG_COALESCE_SET]      = &ethnl_coalesce_request_ops,
 291         [ETHTOOL_MSG_PAUSE_GET]         = &ethnl_pause_request_ops,
 292         [ETHTOOL_MSG_PAUSE_SET]         = &ethnl_pause_request_ops,
 293         [ETHTOOL_MSG_EEE_GET]           = &ethnl_eee_request_ops,
 294         [ETHTOOL_MSG_EEE_SET]           = &ethnl_eee_request_ops,
 295         [ETHTOOL_MSG_FEC_GET]           = &ethnl_fec_request_ops,
 296         [ETHTOOL_MSG_FEC_SET]           = &ethnl_fec_request_ops,
 297         [ETHTOOL_MSG_TSINFO_GET]        = &ethnl_tsinfo_request_ops,
 298         [ETHTOOL_MSG_MODULE_EEPROM_GET] = &ethnl_module_eeprom_request_ops,
 299         [ETHTOOL_MSG_STATS_GET]         = &ethnl_stats_request_ops,
 300         [ETHTOOL_MSG_PHC_VCLOCKS_GET]   = &ethnl_phc_vclocks_request_ops,
 301         [ETHTOOL_MSG_MODULE_GET]        = &ethnl_module_request_ops,
 302         [ETHTOOL_MSG_MODULE_SET]        = &ethnl_module_request_ops,
 303         [ETHTOOL_MSG_PSE_GET]           = &ethnl_pse_request_ops,
 304         [ETHTOOL_MSG_PSE_SET]           = &ethnl_pse_request_ops,
 305         [ETHTOOL_MSG_RSS_GET]           = &ethnl_rss_request_ops,
 306         [ETHTOOL_MSG_PLCA_GET_CFG]      = &ethnl_plca_cfg_request_ops,
 307         [ETHTOOL_MSG_PLCA_SET_CFG]      = &ethnl_plca_cfg_request_ops,
 308         [ETHTOOL_MSG_PLCA_GET_STATUS]   = &ethnl_plca_status_request_ops,
 309         [ETHTOOL_MSG_MM_GET]            = &ethnl_mm_request_ops,
 310         [ETHTOOL_MSG_MM_SET]            = &ethnl_mm_request_ops,
 311 };
 312
 313 static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
 314 {
 315         return (struct ethnl_dump_ctx *)cb->ctx;
 316 }
 317
 318 /**
 319  * ethnl_default_parse() - Parse request message
 320  * @req_info:    pointer to structure to put data into
 321  * @tb:          parsed attributes
 322  * @net:         request netns
 323  * @request_ops: struct request_ops for request type
 324  * @extack:      netlink extack for error reporting
 325  * @require_dev: fail if no device identified in header
 326  *
 327  * Parse universal request header and call request specific ->parse_request()
 328  * callback (if defined) to parse the rest of the message.
 329  *
 330  * Return: 0 on success or negative error code
 331  */
 332 static int ethnl_default_parse(struct ethnl_req_info *req_info,
 333                                struct nlattr **tb, struct net *net,
 334                                const struct ethnl_request_ops *request_ops,
 335                                struct netlink_ext_ack *extack, bool require_dev)
 336 {
 337         int ret;
 338
 339         ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
 340                                          net, extack, require_dev);
 341         if (ret < 0)
 342                 return ret;
 343
 344         if (request_ops->parse_request) {
 345                 ret = request_ops->parse_request(req_info, tb, extack);
 346                 if (ret < 0)
 347                         return ret;
 348         }
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * ethnl_init_reply_data() - Initialize reply data for GET request
 355  * @reply_data: pointer to embedded struct ethnl_reply_data
 356  * @ops:        instance of struct ethnl_request_ops describing the layout
 357  * @dev:        network device to initialize the reply for
 358  *
 359  * Fills the reply data part with zeros and sets the dev member. Must be called
 360  * before calling the ->fill_reply() callback (for each iteration when handling
 361  * dump requests).
 362  */
 363 static void ethnl_init_reply_data(struct ethnl_reply_data *reply_data,
 364                                   const struct ethnl_request_ops *ops,
 365                                   struct net_device *dev)
 366 {
 367         memset(reply_data, 0, ops->reply_data_size);
 368         reply_data->dev = dev;
 369 }
 370
 371 /* default ->doit() handler for GET type requests */
 372 static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
 373 {
 374         struct ethnl_reply_data *reply_data = NULL;
 375         struct ethnl_req_info *req_info = NULL;
 376         const u8 cmd = info->genlhdr->cmd;
 377         const struct ethnl_request_ops *ops;
 378         int hdr_len, reply_len;
 379         struct sk_buff *rskb;
 380         void *reply_payload;
 381         int ret;
 382
 383         ops = ethnl_default_requests[cmd];
 384         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 385                 return -EOPNOTSUPP;
 386         if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 387                 return -EINVAL;
 388
 389         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 390         if (!req_info)
 391                 return -ENOMEM;
 392         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 393         if (!reply_data) {
 394                 kfree(req_info);
 395                 return -ENOMEM;
 396         }
 397
 398         ret = ethnl_default_parse(req_info, info->attrs, genl_info_net(info),
 399                                   ops, info->extack, !ops->allow_nodev_do);
 400         if (ret < 0)
 401                 goto err_dev;
 402         ethnl_init_reply_data(reply_data, ops, req_info->dev);
 403
 404         rtnl_lock();
 405         ret = ops->prepare_data(req_info, reply_data, info);
 406         rtnl_unlock();
 407         if (ret < 0)
 408                 goto err_cleanup;
 409         ret = ops->reply_size(req_info, reply_data);
 410         if (ret < 0)
 411                 goto err_cleanup;
 412         reply_len = ret;
 413         ret = -ENOMEM;
 414         rskb = ethnl_reply_init(reply_len + ethnl_reply_header_size(),
 415                                 req_info->dev, ops->reply_cmd,
 416                                 ops->hdr_attr, info, &reply_payload);
 417         if (!rskb)
 418                 goto err_cleanup;
 419         hdr_len = rskb->len;
 420         ret = ops->fill_reply(rskb, req_info, reply_data);
 421         if (ret < 0)
 422                 goto err_msg;
 423         WARN_ONCE(rskb->len - hdr_len > reply_len,
 424                   "ethnl cmd %d: calculated reply length %d, but consumed %d\n",
 425                   cmd, reply_len, rskb->len - hdr_len);
 426         if (ops->cleanup_data)
 427                 ops->cleanup_data(reply_data);
 428
 429         genlmsg_end(rskb, reply_payload);
 430         netdev_put(req_info->dev, &req_info->dev_tracker);
 431         kfree(reply_data);
 432         kfree(req_info);
 433         return genlmsg_reply(rskb, info);
 434
 435 err_msg:
 436         WARN_ONCE(ret == -EMSGSIZE, "calculated message payload length (%d) not sufficient\n", reply_len);
 437         nlmsg_free(rskb);
 438 err_cleanup:
 439         if (ops->cleanup_data)
 440                 ops->cleanup_data(reply_data);
 441 err_dev:
 442         netdev_put(req_info->dev, &req_info->dev_tracker);
 443         kfree(reply_data);
 444         kfree(req_info);
 445         return ret;
 446 }
 447
 448 static int ethnl_default_dump_one(struct sk_buff *skb, struct net_device *dev,
 449                                   const struct ethnl_dump_ctx *ctx,
 450                                   struct netlink_callback *cb)
 451 {
 452         void *ehdr;
 453         int ret;
 454
 455         ehdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
 456                            &ethtool_genl_family, NLM_F_MULTI,
 457                            ctx->ops->reply_cmd);
 458         if (!ehdr)
 459                 return -EMSGSIZE;
 460
 461         ethnl_init_reply_data(ctx->reply_data, ctx->ops, dev);
 462         rtnl_lock();
 463         ret = ctx->ops->prepare_data(ctx->req_info, ctx->reply_data, NULL);
 464         rtnl_unlock();
 465         if (ret < 0)
 466                 goto out;
 467         ret = ethnl_fill_reply_header(skb, dev, ctx->ops->hdr_attr);
 468         if (ret < 0)
 469                 goto out;
 470         ret = ctx->ops->fill_reply(skb, ctx->req_info, ctx->reply_data);
 471
 472 out:
 473         if (ctx->ops->cleanup_data)
 474                 ctx->ops->cleanup_data(ctx->reply_data);
 475         ctx->reply_data->dev = NULL;
 476         if (ret < 0)
 477                 genlmsg_cancel(skb, ehdr);
 478         else
 479                 genlmsg_end(skb, ehdr);
 480         return ret;
 481 }
 482
 483 /* Default ->dumpit() handler for GET requests. Device iteration copied from
 484  * rtnl_dump_ifinfo(); we have to be more careful about device hashtable
 485  * persistence as we cannot guarantee to hold RTNL lock through the whole
 486  * function as rtnetnlink does.
 487  */
 488 static int ethnl_default_dumpit(struct sk_buff *skb,
 489                                 struct netlink_callback *cb)
 490 {
 491         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 492         struct net *net = sock_net(skb->sk);
 493         int s_idx = ctx->pos_idx;
 494         int h, idx = 0;
 495         int ret = 0;
 496
 497         rtnl_lock();
 498         for (h = ctx->pos_hash; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
 499                 struct hlist_head *head;
 500                 struct net_device *dev;
 501                 unsigned int seq;
 502
 503                 head = &net->dev_index_head[h];
 504
 505 restart_chain:
 506                 seq = net->dev_base_seq;
 507                 cb->seq = seq;
 508                 idx = 0;
 509                 hlist_for_each_entry(dev, head, index_hlist) {
 510                         if (idx < s_idx)
 511                                 goto cont;
 512                         dev_hold(dev);
 513                         rtnl_unlock();
 514
 515                         ret = ethnl_default_dump_one(skb, dev, ctx, cb);
 516                         dev_put(dev);
 517                         if (ret < 0) {
 518                                 if (ret == -EOPNOTSUPP)
 519                                         goto lock_and_cont;
 520                                 if (likely(skb->len))
 521                                         ret = skb->len;
 522                                 goto out;
 523                         }
 524 lock_and_cont:
 525                         rtnl_lock();
 526                         if (net->dev_base_seq != seq) {
 527                                 s_idx = idx + 1;
 528                                 goto restart_chain;
 529                         }
 530 cont:
 531                         idx++;
 532                 }
 533
 534         }
 535         rtnl_unlock();
 536
 537 out:
 538         ctx->pos_hash = h;
 539         ctx->pos_idx = idx;
 540         nl_dump_check_consistent(cb, nlmsg_hdr(skb));
 541
 542         return ret;
 543 }
 544
 545 /* generic ->start() handler for GET requests */
 546 static int ethnl_default_start(struct netlink_callback *cb)
 547 {
 548         const struct genl_dumpit_info *info = genl_dumpit_info(cb);
 549         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 550         struct ethnl_reply_data *reply_data;
 551         const struct ethnl_request_ops *ops;
 552         struct ethnl_req_info *req_info;
 553         struct genlmsghdr *ghdr;
 554         int ret;
 555
 556         BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
 557
 558         ghdr = nlmsg_data(cb->nlh);
 559         ops = ethnl_default_requests[ghdr->cmd];
 560         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", ghdr->cmd))
 561                 return -EOPNOTSUPP;
 562         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 563         if (!req_info)
 564                 return -ENOMEM;
 565         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 566         if (!reply_data) {
 567                 ret = -ENOMEM;
 568                 goto free_req_info;
 569         }
 570
 571         ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk),
 572                                   ops, cb->extack, false);
 573         if (req_info->dev) {
 574                 /* We ignore device specification in dump requests but as the
 575                  * same parser as for non-dump (doit) requests is used, it
 576                  * would take reference to the device if it finds one
 577                  */
 578                 netdev_put(req_info->dev, &req_info->dev_tracker);
 579                 req_info->dev = NULL;
 580         }
 581         if (ret < 0)
 582                 goto free_reply_data;
 583
 584         ctx->ops = ops;
 585         ctx->req_info = req_info;
 586         ctx->reply_data = reply_data;
 587         ctx->pos_hash = 0;
 588         ctx->pos_idx = 0;
 589
 590         return 0;
 591
 592 free_reply_data:
 593         kfree(reply_data);
 594 free_req_info:
 595         kfree(req_info);
 596
 597         return ret;
 598 }
 599
 600 /* default ->done() handler for GET requests */
 601 static int ethnl_default_done(struct netlink_callback *cb)
 602 {
 603         struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
 604
 605         kfree(ctx->reply_data);
 606         kfree(ctx->req_info);
 607
 608         return 0;
 609 }
 610
 611 static int ethnl_default_set_doit(struct sk_buff *skb, struct genl_info *info)
 612 {
 613         const struct ethnl_request_ops *ops;
 614         struct ethnl_req_info req_info = {};
 615         const u8 cmd = info->genlhdr->cmd;
 616         int ret;
 617
 618         ops = ethnl_default_requests[cmd];
 619         if (WARN_ONCE(!ops, "cmd %u has no ethnl_request_ops\n", cmd))
 620                 return -EOPNOTSUPP;
 621         if (GENL_REQ_ATTR_CHECK(info, ops->hdr_attr))
 622                 return -EINVAL;
 623
 624         ret = ethnl_parse_header_dev_get(&req_info, info->attrs[ops->hdr_attr],
 625                                          genl_info_net(info), info->extack,
 626                                          true);
 627         if (ret < 0)
 628                 return ret;
 629
 630         if (ops->set_validate) {
 631                 ret = ops->set_validate(&req_info, info);
 632                 /* 0 means nothing to do */
 633                 if (ret <= 0)
 634                         goto out_dev;
 635         }
 636
 637         rtnl_lock();
 638         ret = ethnl_ops_begin(req_info.dev);
 639         if (ret < 0)
 640                 goto out_rtnl;
 641
 642         ret = ops->set(&req_info, info);
 643         if (ret <= 0)
 644                 goto out_ops;
 645         ethtool_notify(req_info.dev, ops->set_ntf_cmd, NULL);
 646
 647         ret = 0;
 648 out_ops:
 649         ethnl_ops_complete(req_info.dev);
 650 out_rtnl:
 651         rtnl_unlock();
 652 out_dev:
 653         ethnl_parse_header_dev_put(&req_info);
 654         return ret;
 655 }
 656
 657 static const struct ethnl_request_ops *
 658 ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
 659         [ETHTOOL_MSG_LINKINFO_NTF]      = &ethnl_linkinfo_request_ops,
 660         [ETHTOOL_MSG_LINKMODES_NTF]     = &ethnl_linkmodes_request_ops,
 661         [ETHTOOL_MSG_DEBUG_NTF]         = &ethnl_debug_request_ops,
 662         [ETHTOOL_MSG_WOL_NTF]           = &ethnl_wol_request_ops,
 663         [ETHTOOL_MSG_FEATURES_NTF]      = &ethnl_features_request_ops,
 664         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = &ethnl_privflags_request_ops,
 665         [ETHTOOL_MSG_RINGS_NTF]         = &ethnl_rings_request_ops,
 666         [ETHTOOL_MSG_CHANNELS_NTF]      = &ethnl_channels_request_ops,
 667         [ETHTOOL_MSG_COALESCE_NTF]      = &ethnl_coalesce_request_ops,
 668         [ETHTOOL_MSG_PAUSE_NTF]         = &ethnl_pause_request_ops,
 669         [ETHTOOL_MSG_EEE_NTF]           = &ethnl_eee_request_ops,
 670         [ETHTOOL_MSG_FEC_NTF]           = &ethnl_fec_request_ops,
 671         [ETHTOOL_MSG_MODULE_NTF]        = &ethnl_module_request_ops,
 672         [ETHTOOL_MSG_PLCA_NTF]          = &ethnl_plca_cfg_request_ops,
 673         [ETHTOOL_MSG_MM_NTF]            = &ethnl_mm_request_ops,
 674 };
 675
 676 /* default notification handler */
 677 static void ethnl_default_notify(struct net_device *dev, unsigned int cmd,
 678                                  const void *data)
 679 {
 680         struct ethnl_reply_data *reply_data;
 681         const struct ethnl_request_ops *ops;
 682         struct ethnl_req_info *req_info;
 683         struct sk_buff *skb;
 684         void *reply_payload;
 685         int reply_len;
 686         int ret;
 687
 688         if (WARN_ONCE(cmd > ETHTOOL_MSG_KERNEL_MAX ||
 689                       !ethnl_default_notify_ops[cmd],
 690                       "unexpected notification type %u\n", cmd))
 691                 return;
 692         ops = ethnl_default_notify_ops[cmd];
 693         req_info = kzalloc(ops->req_info_size, GFP_KERNEL);
 694         if (!req_info)
 695                 return;
 696         reply_data = kmalloc(ops->reply_data_size, GFP_KERNEL);
 697         if (!reply_data) {
 698                 kfree(req_info);
 699                 return;
 700         }
 701
 702         req_info->dev = dev;
 703         req_info->flags |= ETHTOOL_FLAG_COMPACT_BITSETS;
 704
 705         ethnl_init_reply_data(reply_data, ops, dev);
 706         ret = ops->prepare_data(req_info, reply_data, NULL);
 707         if (ret < 0)
 708                 goto err_cleanup;
 709         ret = ops->reply_size(req_info, reply_data);
 710         if (ret < 0)
 711                 goto err_cleanup;
 712         reply_len = ret + ethnl_reply_header_size();
 713         skb = genlmsg_new(reply_len, GFP_KERNEL);
 714         if (!skb)
 715                 goto err_cleanup;
 716         reply_payload = ethnl_bcastmsg_put(skb, cmd);
 717         if (!reply_payload)
 718                 goto err_skb;
 719         ret = ethnl_fill_reply_header(skb, dev, ops->hdr_attr);
 720         if (ret < 0)
 721                 goto err_msg;
 722         ret = ops->fill_reply(skb, req_info, reply_data);
 723         if (ret < 0)
 724                 goto err_msg;
 725         if (ops->cleanup_data)
 726                 ops->cleanup_data(reply_data);
 727
 728         genlmsg_end(skb, reply_payload);
 729         kfree(reply_data);
 730         kfree(req_info);
 731         ethnl_multicast(skb, dev);
 732         return;
 733
 734 err_msg:
 735         WARN_ONCE(ret == -EMSGSIZE,
 736                   "calculated message payload length (%d) not sufficient\n",
 737                   reply_len);
 738 err_skb:
 739         nlmsg_free(skb);
 740 err_cleanup:
 741         if (ops->cleanup_data)
 742                 ops->cleanup_data(reply_data);
 743         kfree(reply_data);
 744         kfree(req_info);
 745         return;
 746 }
 747
 748 /* notifications */
 749
 750 typedef void (*ethnl_notify_handler_t)(struct net_device *dev, unsigned int cmd,
 751                                        const void *data);
 752
 753 static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
 754         [ETHTOOL_MSG_LINKINFO_NTF]      = ethnl_default_notify,
 755         [ETHTOOL_MSG_LINKMODES_NTF]     = ethnl_default_notify,
 756         [ETHTOOL_MSG_DEBUG_NTF]         = ethnl_default_notify,
 757         [ETHTOOL_MSG_WOL_NTF]           = ethnl_default_notify,
 758         [ETHTOOL_MSG_FEATURES_NTF]      = ethnl_default_notify,
 759         [ETHTOOL_MSG_PRIVFLAGS_NTF]     = ethnl_default_notify,
 760         [ETHTOOL_MSG_RINGS_NTF]         = ethnl_default_notify,
 761         [ETHTOOL_MSG_CHANNELS_NTF]      = ethnl_default_notify,
 762         [ETHTOOL_MSG_COALESCE_NTF]      = ethnl_default_notify,
 763         [ETHTOOL_MSG_PAUSE_NTF]         = ethnl_default_notify,
 764         [ETHTOOL_MSG_EEE_NTF]           = ethnl_default_notify,
 765         [ETHTOOL_MSG_FEC_NTF]           = ethnl_default_notify,
 766         [ETHTOOL_MSG_MODULE_NTF]        = ethnl_default_notify,
 767         [ETHTOOL_MSG_PLCA_NTF]          = ethnl_default_notify,
 768         [ETHTOOL_MSG_MM_NTF]            = ethnl_default_notify,
 769 };
 770
 771 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
 772 {
 773         if (unlikely(!ethnl_ok))
 774                 return;
 775         ASSERT_RTNL();
 776
 777         if (likely(cmd < ARRAY_SIZE(ethnl_notify_handlers) &&
 778                    ethnl_notify_handlers[cmd]))
 779                 ethnl_notify_handlers[cmd](dev, cmd, data);
 780         else
 781                 WARN_ONCE(1, "notification %u not implemented (dev=%s)\n",
 782                           cmd, netdev_name(dev));
 783 }
 784 EXPORT_SYMBOL(ethtool_notify);
 785
 786 static void ethnl_notify_features(struct netdev_notifier_info *info)
 787 {
 788         struct net_device *dev = netdev_notifier_info_to_dev(info);
 789
 790         ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
 791 }
 792
 793 static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
 794                               void *ptr)
 795 {
 796         switch (event) {
 797         case NETDEV_FEAT_CHANGE:
 798                 ethnl_notify_features(ptr);
 799                 break;
 800         }
 801
 802         return NOTIFY_DONE;
 803 }
 804
 805 static struct notifier_block ethnl_netdev_notifier = {
 806         .notifier_call = ethnl_netdev_event,
 807 };
 808
 809 /* genetlink setup */
 810
 811 static const struct genl_ops ethtool_genl_ops[] = {
 812         {
 813                 .cmd    = ETHTOOL_MSG_STRSET_GET,
 814                 .doit   = ethnl_default_doit,
 815                 .start  = ethnl_default_start,
 816                 .dumpit = ethnl_default_dumpit,
 817                 .done   = ethnl_default_done,
 818                 .policy = ethnl_strset_get_policy,
 819                 .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
 820         },
 821         {
 822                 .cmd    = ETHTOOL_MSG_LINKINFO_GET,
 823                 .doit   = ethnl_default_doit,
 824                 .start  = ethnl_default_start,
 825                 .dumpit = ethnl_default_dumpit,
 826                 .done   = ethnl_default_done,
 827                 .policy = ethnl_linkinfo_get_policy,
 828                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
 829         },
 830         {
 831                 .cmd    = ETHTOOL_MSG_LINKINFO_SET,
 832                 .flags  = GENL_UNS_ADMIN_PERM,
 833                 .doit   = ethnl_default_set_doit,
 834                 .policy = ethnl_linkinfo_set_policy,
 835                 .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
 836         },
 837         {
 838                 .cmd    = ETHTOOL_MSG_LINKMODES_GET,
 839                 .doit   = ethnl_default_doit,
 840                 .start  = ethnl_default_start,
 841                 .dumpit = ethnl_default_dumpit,
 842                 .done   = ethnl_default_done,
 843                 .policy = ethnl_linkmodes_get_policy,
 844                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
 845         },
 846         {
 847                 .cmd    = ETHTOOL_MSG_LINKMODES_SET,
 848                 .flags  = GENL_UNS_ADMIN_PERM,
 849                 .doit   = ethnl_default_set_doit,
 850                 .policy = ethnl_linkmodes_set_policy,
 851                 .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
 852         },
 853         {
 854                 .cmd    = ETHTOOL_MSG_LINKSTATE_GET,
 855                 .doit   = ethnl_default_doit,
 856                 .start  = ethnl_default_start,
 857                 .dumpit = ethnl_default_dumpit,
 858                 .done   = ethnl_default_done,
 859                 .policy = ethnl_linkstate_get_policy,
 860                 .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
 861         },
 862         {
 863                 .cmd    = ETHTOOL_MSG_DEBUG_GET,
 864                 .doit   = ethnl_default_doit,
 865                 .start  = ethnl_default_start,
 866                 .dumpit = ethnl_default_dumpit,
 867                 .done   = ethnl_default_done,
 868                 .policy = ethnl_debug_get_policy,
 869                 .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
 870         },
 871         {
 872                 .cmd    = ETHTOOL_MSG_DEBUG_SET,
 873                 .flags  = GENL_UNS_ADMIN_PERM,
 874                 .doit   = ethnl_default_set_doit,
 875                 .policy = ethnl_debug_set_policy,
 876                 .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
 877         },
 878         {
 879                 .cmd    = ETHTOOL_MSG_WOL_GET,
 880                 .flags  = GENL_UNS_ADMIN_PERM,
 881                 .doit   = ethnl_default_doit,
 882                 .start  = ethnl_default_start,
 883                 .dumpit = ethnl_default_dumpit,
 884                 .done   = ethnl_default_done,
 885                 .policy = ethnl_wol_get_policy,
 886                 .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
 887         },
 888         {
 889                 .cmd    = ETHTOOL_MSG_WOL_SET,
 890                 .flags  = GENL_UNS_ADMIN_PERM,
 891                 .doit   = ethnl_default_set_doit,
 892                 .policy = ethnl_wol_set_policy,
 893                 .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
 894         },
 895         {
 896                 .cmd    = ETHTOOL_MSG_FEATURES_GET,
 897                 .doit   = ethnl_default_doit,
 898                 .start  = ethnl_default_start,
 899                 .dumpit = ethnl_default_dumpit,
 900                 .done   = ethnl_default_done,
 901                 .policy = ethnl_features_get_policy,
 902                 .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
 903         },
 904         {
 905                 .cmd    = ETHTOOL_MSG_FEATURES_SET,
 906                 .flags  = GENL_UNS_ADMIN_PERM,
 907                 .doit   = ethnl_set_features,
 908                 .policy = ethnl_features_set_policy,
 909                 .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
 910         },
 911         {
 912                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_GET,
 913                 .doit   = ethnl_default_doit,
 914                 .start  = ethnl_default_start,
 915                 .dumpit = ethnl_default_dumpit,
 916                 .done   = ethnl_default_done,
 917                 .policy = ethnl_privflags_get_policy,
 918                 .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
 919         },
 920         {
 921                 .cmd    = ETHTOOL_MSG_PRIVFLAGS_SET,
 922                 .flags  = GENL_UNS_ADMIN_PERM,
 923                 .doit   = ethnl_default_set_doit,
 924                 .policy = ethnl_privflags_set_policy,
 925                 .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
 926         },
 927         {
 928                 .cmd    = ETHTOOL_MSG_RINGS_GET,
 929                 .doit   = ethnl_default_doit,
 930                 .start  = ethnl_default_start,
 931                 .dumpit = ethnl_default_dumpit,
 932                 .done   = ethnl_default_done,
 933                 .policy = ethnl_rings_get_policy,
 934                 .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
 935         },
 936         {
 937                 .cmd    = ETHTOOL_MSG_RINGS_SET,
 938                 .flags  = GENL_UNS_ADMIN_PERM,
 939                 .doit   = ethnl_default_set_doit,
 940                 .policy = ethnl_rings_set_policy,
 941                 .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
 942         },
 943         {
 944                 .cmd    = ETHTOOL_MSG_CHANNELS_GET,
 945                 .doit   = ethnl_default_doit,
 946                 .start  = ethnl_default_start,
 947                 .dumpit = ethnl_default_dumpit,
 948                 .done   = ethnl_default_done,
 949                 .policy = ethnl_channels_get_policy,
 950                 .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
 951         },
 952         {
 953                 .cmd    = ETHTOOL_MSG_CHANNELS_SET,
 954                 .flags  = GENL_UNS_ADMIN_PERM,
 955                 .doit   = ethnl_default_set_doit,
 956                 .policy = ethnl_channels_set_policy,
 957                 .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
 958         },
 959         {
 960                 .cmd    = ETHTOOL_MSG_COALESCE_GET,
 961                 .doit   = ethnl_default_doit,
 962                 .start  = ethnl_default_start,
 963                 .dumpit = ethnl_default_dumpit,
 964                 .done   = ethnl_default_done,
 965                 .policy = ethnl_coalesce_get_policy,
 966                 .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
 967         },
 968         {
 969                 .cmd    = ETHTOOL_MSG_COALESCE_SET,
 970                 .flags  = GENL_UNS_ADMIN_PERM,
 971                 .doit   = ethnl_default_set_doit,
 972                 .policy = ethnl_coalesce_set_policy,
 973                 .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
 974         },
 975         {
 976                 .cmd    = ETHTOOL_MSG_PAUSE_GET,
 977                 .doit   = ethnl_default_doit,
 978                 .start  = ethnl_default_start,
 979                 .dumpit = ethnl_default_dumpit,
 980                 .done   = ethnl_default_done,
 981                 .policy = ethnl_pause_get_policy,
 982                 .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
 983         },
 984         {
 985                 .cmd    = ETHTOOL_MSG_PAUSE_SET,
 986                 .flags  = GENL_UNS_ADMIN_PERM,
 987                 .doit   = ethnl_default_set_doit,
 988                 .policy = ethnl_pause_set_policy,
 989                 .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
 990         },
 991         {
 992                 .cmd    = ETHTOOL_MSG_EEE_GET,
 993                 .doit   = ethnl_default_doit,
 994                 .start  = ethnl_default_start,
 995                 .dumpit = ethnl_default_dumpit,
 996                 .done   = ethnl_default_done,
 997                 .policy = ethnl_eee_get_policy,
 998                 .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
 999         },
1000         {
1001                 .cmd    = ETHTOOL_MSG_EEE_SET,
1002                 .flags  = GENL_UNS_ADMIN_PERM,
1003                 .doit   = ethnl_default_set_doit,
1004                 .policy = ethnl_eee_set_policy,
1005                 .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
1006         },
1007         {
1008                 .cmd    = ETHTOOL_MSG_TSINFO_GET,
1009                 .doit   = ethnl_default_doit,
1010                 .start  = ethnl_default_start,
1011                 .dumpit = ethnl_default_dumpit,
1012                 .done   = ethnl_default_done,
1013                 .policy = ethnl_tsinfo_get_policy,
1014                 .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
1015         },
1016         {
1017                 .cmd    = ETHTOOL_MSG_CABLE_TEST_ACT,
1018                 .flags  = GENL_UNS_ADMIN_PERM,
1019                 .doit   = ethnl_act_cable_test,
1020                 .policy = ethnl_cable_test_act_policy,
1021                 .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
1022         },
1023         {
1024                 .cmd    = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
1025                 .flags  = GENL_UNS_ADMIN_PERM,
1026                 .doit   = ethnl_act_cable_test_tdr,
1027                 .policy = ethnl_cable_test_tdr_act_policy,
1028                 .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
1029         },
1030         {
1031                 .cmd    = ETHTOOL_MSG_TUNNEL_INFO_GET,
1032                 .doit   = ethnl_tunnel_info_doit,
1033                 .start  = ethnl_tunnel_info_start,
1034                 .dumpit = ethnl_tunnel_info_dumpit,
1035                 .policy = ethnl_tunnel_info_get_policy,
1036                 .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
1037         },
1038         {
1039                 .cmd    = ETHTOOL_MSG_FEC_GET,
1040                 .doit   = ethnl_default_doit,
1041                 .start  = ethnl_default_start,
1042                 .dumpit = ethnl_default_dumpit,
1043                 .done   = ethnl_default_done,
1044                 .policy = ethnl_fec_get_policy,
1045                 .maxattr = ARRAY_SIZE(ethnl_fec_get_policy) - 1,
1046         },
1047         {
1048                 .cmd    = ETHTOOL_MSG_FEC_SET,
1049                 .flags  = GENL_UNS_ADMIN_PERM,
1050                 .doit   = ethnl_default_set_doit,
1051                 .policy = ethnl_fec_set_policy,
1052                 .maxattr = ARRAY_SIZE(ethnl_fec_set_policy) - 1,
1053         },
1054         {
1055                 .cmd    = ETHTOOL_MSG_MODULE_EEPROM_GET,
1056                 .flags  = GENL_UNS_ADMIN_PERM,
1057                 .doit   = ethnl_default_doit,
1058                 .start  = ethnl_default_start,
1059                 .dumpit = ethnl_default_dumpit,
1060                 .done   = ethnl_default_done,
1061                 .policy = ethnl_module_eeprom_get_policy,
1062                 .maxattr = ARRAY_SIZE(ethnl_module_eeprom_get_policy) - 1,
1063         },
1064         {
1065                 .cmd    = ETHTOOL_MSG_STATS_GET,
1066                 .doit   = ethnl_default_doit,
1067                 .start  = ethnl_default_start,
1068                 .dumpit = ethnl_default_dumpit,
1069                 .done   = ethnl_default_done,
1070                 .policy = ethnl_stats_get_policy,
1071                 .maxattr = ARRAY_SIZE(ethnl_stats_get_policy) - 1,
1072         },
1073         {
1074                 .cmd    = ETHTOOL_MSG_PHC_VCLOCKS_GET,
1075                 .doit   = ethnl_default_doit,
1076                 .start  = ethnl_default_start,
1077                 .dumpit = ethnl_default_dumpit,
1078                 .done   = ethnl_default_done,
1079                 .policy = ethnl_phc_vclocks_get_policy,
1080                 .maxattr = ARRAY_SIZE(ethnl_phc_vclocks_get_policy) - 1,
1081         },
1082         {
1083                 .cmd    = ETHTOOL_MSG_MODULE_GET,
1084                 .doit   = ethnl_default_doit,
1085                 .start  = ethnl_default_start,
1086                 .dumpit = ethnl_default_dumpit,
1087                 .done   = ethnl_default_done,
1088                 .policy = ethnl_module_get_policy,
1089                 .maxattr = ARRAY_SIZE(ethnl_module_get_policy) - 1,
1090         },
1091         {
1092                 .cmd    = ETHTOOL_MSG_MODULE_SET,
1093                 .flags  = GENL_UNS_ADMIN_PERM,
1094                 .doit   = ethnl_default_set_doit,
1095                 .policy = ethnl_module_set_policy,
1096                 .maxattr = ARRAY_SIZE(ethnl_module_set_policy) - 1,
1097         },
1098         {
1099                 .cmd    = ETHTOOL_MSG_PSE_GET,
1100                 .doit   = ethnl_default_doit,
1101                 .start  = ethnl_default_start,
1102                 .dumpit = ethnl_default_dumpit,
1103                 .done   = ethnl_default_done,
1104                 .policy = ethnl_pse_get_policy,
1105                 .maxattr = ARRAY_SIZE(ethnl_pse_get_policy) - 1,
1106         },
1107         {
1108                 .cmd    = ETHTOOL_MSG_PSE_SET,
1109                 .flags  = GENL_UNS_ADMIN_PERM,
1110                 .doit   = ethnl_default_set_doit,
1111                 .policy = ethnl_pse_set_policy,
1112                 .maxattr = ARRAY_SIZE(ethnl_pse_set_policy) - 1,
1113         },
1114         {
1115                 .cmd    = ETHTOOL_MSG_RSS_GET,
1116                 .doit   = ethnl_default_doit,
1117                 .policy = ethnl_rss_get_policy,
1118                 .maxattr = ARRAY_SIZE(ethnl_rss_get_policy) - 1,
1119         },
1120         {
1121                 .cmd    = ETHTOOL_MSG_PLCA_GET_CFG,
1122                 .doit   = ethnl_default_doit,
1123                 .start  = ethnl_default_start,
1124                 .dumpit = ethnl_default_dumpit,
1125                 .done   = ethnl_default_done,
1126                 .policy = ethnl_plca_get_cfg_policy,
1127                 .maxattr = ARRAY_SIZE(ethnl_plca_get_cfg_policy) - 1,
1128         },
1129         {
1130                 .cmd    = ETHTOOL_MSG_PLCA_SET_CFG,
1131                 .flags  = GENL_UNS_ADMIN_PERM,
1132                 .doit   = ethnl_default_set_doit,
1133                 .policy = ethnl_plca_set_cfg_policy,
1134                 .maxattr = ARRAY_SIZE(ethnl_plca_set_cfg_policy) - 1,
1135         },
1136         {
1137                 .cmd    = ETHTOOL_MSG_PLCA_GET_STATUS,
1138                 .doit   = ethnl_default_doit,
1139                 .start  = ethnl_default_start,
1140                 .dumpit = ethnl_default_dumpit,
1141                 .done   = ethnl_default_done,
1142                 .policy = ethnl_plca_get_status_policy,
1143                 .maxattr = ARRAY_SIZE(ethnl_plca_get_status_policy) - 1,
1144         },
1145         {
1146                 .cmd    = ETHTOOL_MSG_MM_GET,
1147                 .doit   = ethnl_default_doit,
1148                 .start  = ethnl_default_start,
1149                 .dumpit = ethnl_default_dumpit,
1150                 .done   = ethnl_default_done,
1151                 .policy = ethnl_mm_get_policy,
1152                 .maxattr = ARRAY_SIZE(ethnl_mm_get_policy) - 1,
1153         },
1154         {
1155                 .cmd    = ETHTOOL_MSG_MM_SET,
1156                 .flags  = GENL_UNS_ADMIN_PERM,
1157                 .doit   = ethnl_default_set_doit,
1158                 .policy = ethnl_mm_set_policy,
1159                 .maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
1160         },
1161 };
1162
1163 static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
1164         [ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
1165 };
1166
1167 static struct genl_family ethtool_genl_family __ro_after_init = {
1168         .name           = ETHTOOL_GENL_NAME,
1169         .version        = ETHTOOL_GENL_VERSION,
1170         .netnsok        = true,
1171         .parallel_ops   = true,
1172         .ops            = ethtool_genl_ops,
1173         .n_ops          = ARRAY_SIZE(ethtool_genl_ops),
1174         .resv_start_op  = ETHTOOL_MSG_MODULE_GET + 1,
1175         .mcgrps         = ethtool_nl_mcgrps,
1176         .n_mcgrps       = ARRAY_SIZE(ethtool_nl_mcgrps),
1177 };
1178
1179 /* module setup */
1180
1181 static int __init ethnl_init(void)
1182 {
1183         int ret;
1184
1185         ret = genl_register_family(&ethtool_genl_family);
1186         if (WARN(ret < 0, "ethtool: genetlink family registration failed"))
1187                 return ret;
1188         ethnl_ok = true;
1189
1190         ret = register_netdevice_notifier(&ethnl_netdev_notifier);
1191         WARN(ret < 0, "ethtool: net device notifier registration failed");
1192         return ret;
1193 }
1194
1195 subsys_initcall(ethnl_init);