net/devlink/health.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
   4  * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
   5  */
   6
   7 #include <net/genetlink.h>
   8 #include <net/sock.h>
   9 #include <trace/events/devlink.h>
  10 #include "devl_internal.h"
  11
  12 struct devlink_fmsg_item {
  13         struct list_head list;
  14         int attrtype;
  15         u8 nla_type;
  16         u16 len;
  17         int value[];
  18 };
  19
  20 struct devlink_fmsg {
  21         struct list_head item_list;
  22         bool putting_binary; /* This flag forces enclosing of binary data
  23                               * in an array brackets. It forces using
  24                               * of designated API:
  25                               * devlink_fmsg_binary_pair_nest_start()
  26                               * devlink_fmsg_binary_pair_nest_end()
  27                               */
  28 };
  29
  30 static struct devlink_fmsg *devlink_fmsg_alloc(void)
  31 {
  32         struct devlink_fmsg *fmsg;
  33
  34         fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
  35         if (!fmsg)
  36                 return NULL;
  37
  38         INIT_LIST_HEAD(&fmsg->item_list);
  39
  40         return fmsg;
  41 }
  42
  43 static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
  44 {
  45         struct devlink_fmsg_item *item, *tmp;
  46
  47         list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
  48                 list_del(&item->list);
  49                 kfree(item);
  50         }
  51         kfree(fmsg);
  52 }
  53
  54 struct devlink_health_reporter {
  55         struct list_head list;
  56         void *priv;
  57         const struct devlink_health_reporter_ops *ops;
  58         struct devlink *devlink;
  59         struct devlink_port *devlink_port;
  60         struct devlink_fmsg *dump_fmsg;
  61         u64 graceful_period;
  62         bool auto_recover;
  63         bool auto_dump;
  64         u8 health_state;
  65         u64 dump_ts;
  66         u64 dump_real_ts;
  67         u64 error_count;
  68         u64 recovery_count;
  69         u64 last_recovery_ts;
  70 };
  71
  72 void *
  73 devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
  74 {
  75         return reporter->priv;
  76 }
  77 EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
  78
  79 static struct devlink_health_reporter *
  80 __devlink_health_reporter_find_by_name(struct list_head *reporter_list,
  81                                        const char *reporter_name)
  82 {
  83         struct devlink_health_reporter *reporter;
  84
  85         list_for_each_entry(reporter, reporter_list, list)
  86                 if (!strcmp(reporter->ops->name, reporter_name))
  87                         return reporter;
  88         return NULL;
  89 }
  90
  91 static struct devlink_health_reporter *
  92 devlink_health_reporter_find_by_name(struct devlink *devlink,
  93                                      const char *reporter_name)
  94 {
  95         return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
  96                                                       reporter_name);
  97 }
  98
  99 static struct devlink_health_reporter *
 100 devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
 101                                           const char *reporter_name)
 102 {
 103         return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
 104                                                       reporter_name);
 105 }
 106
 107 static struct devlink_health_reporter *
 108 __devlink_health_reporter_create(struct devlink *devlink,
 109                                  const struct devlink_health_reporter_ops *ops,
 110                                  u64 graceful_period, void *priv)
 111 {
 112         struct devlink_health_reporter *reporter;
 113
 114         if (WARN_ON(graceful_period && !ops->recover))
 115                 return ERR_PTR(-EINVAL);
 116
 117         reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
 118         if (!reporter)
 119                 return ERR_PTR(-ENOMEM);
 120
 121         reporter->priv = priv;
 122         reporter->ops = ops;
 123         reporter->devlink = devlink;
 124         reporter->graceful_period = graceful_period;
 125         reporter->auto_recover = !!ops->recover;
 126         reporter->auto_dump = !!ops->dump;
 127         return reporter;
 128 }
 129
 130 /**
 131  * devl_port_health_reporter_create() - create devlink health reporter for
 132  *                                      specified port instance
 133  *
 134  * @port: devlink_port to which health reports will relate
 135  * @ops: devlink health reporter ops
 136  * @graceful_period: min time (in msec) between recovery attempts
 137  * @priv: driver priv pointer
 138  */
 139 struct devlink_health_reporter *
 140 devl_port_health_reporter_create(struct devlink_port *port,
 141                                  const struct devlink_health_reporter_ops *ops,
 142                                  u64 graceful_period, void *priv)
 143 {
 144         struct devlink_health_reporter *reporter;
 145
 146         devl_assert_locked(port->devlink);
 147
 148         if (__devlink_health_reporter_find_by_name(&port->reporter_list,
 149                                                    ops->name))
 150                 return ERR_PTR(-EEXIST);
 151
 152         reporter = __devlink_health_reporter_create(port->devlink, ops,
 153                                                     graceful_period, priv);
 154         if (IS_ERR(reporter))
 155                 return reporter;
 156
 157         reporter->devlink_port = port;
 158         list_add_tail(&reporter->list, &port->reporter_list);
 159         return reporter;
 160 }
 161 EXPORT_SYMBOL_GPL(devl_port_health_reporter_create);
 162
 163 struct devlink_health_reporter *
 164 devlink_port_health_reporter_create(struct devlink_port *port,
 165                                     const struct devlink_health_reporter_ops *ops,
 166                                     u64 graceful_period, void *priv)
 167 {
 168         struct devlink_health_reporter *reporter;
 169         struct devlink *devlink = port->devlink;
 170
 171         devl_lock(devlink);
 172         reporter = devl_port_health_reporter_create(port, ops,
 173                                                     graceful_period, priv);
 174         devl_unlock(devlink);
 175         return reporter;
 176 }
 177 EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
 178
 179 /**
 180  * devl_health_reporter_create - create devlink health reporter
 181  *
 182  * @devlink: devlink instance which the health reports will relate
 183  * @ops: devlink health reporter ops
 184  * @graceful_period: min time (in msec) between recovery attempts
 185  * @priv: driver priv pointer
 186  */
 187 struct devlink_health_reporter *
 188 devl_health_reporter_create(struct devlink *devlink,
 189                             const struct devlink_health_reporter_ops *ops,
 190                             u64 graceful_period, void *priv)
 191 {
 192         struct devlink_health_reporter *reporter;
 193
 194         devl_assert_locked(devlink);
 195
 196         if (devlink_health_reporter_find_by_name(devlink, ops->name))
 197                 return ERR_PTR(-EEXIST);
 198
 199         reporter = __devlink_health_reporter_create(devlink, ops,
 200                                                     graceful_period, priv);
 201         if (IS_ERR(reporter))
 202                 return reporter;
 203
 204         list_add_tail(&reporter->list, &devlink->reporter_list);
 205         return reporter;
 206 }
 207 EXPORT_SYMBOL_GPL(devl_health_reporter_create);
 208
 209 struct devlink_health_reporter *
 210 devlink_health_reporter_create(struct devlink *devlink,
 211                                const struct devlink_health_reporter_ops *ops,
 212                                u64 graceful_period, void *priv)
 213 {
 214         struct devlink_health_reporter *reporter;
 215
 216         devl_lock(devlink);
 217         reporter = devl_health_reporter_create(devlink, ops,
 218                                                graceful_period, priv);
 219         devl_unlock(devlink);
 220         return reporter;
 221 }
 222 EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
 223
 224 static void
 225 devlink_health_reporter_free(struct devlink_health_reporter *reporter)
 226 {
 227         if (reporter->dump_fmsg)
 228                 devlink_fmsg_free(reporter->dump_fmsg);
 229         kfree(reporter);
 230 }
 231
 232 /**
 233  * devl_health_reporter_destroy() - destroy devlink health reporter
 234  *
 235  * @reporter: devlink health reporter to destroy
 236  */
 237 void
 238 devl_health_reporter_destroy(struct devlink_health_reporter *reporter)
 239 {
 240         devl_assert_locked(reporter->devlink);
 241
 242         list_del(&reporter->list);
 243         devlink_health_reporter_free(reporter);
 244 }
 245 EXPORT_SYMBOL_GPL(devl_health_reporter_destroy);
 246
 247 void
 248 devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
 249 {
 250         struct devlink *devlink = reporter->devlink;
 251
 252         devl_lock(devlink);
 253         devl_health_reporter_destroy(reporter);
 254         devl_unlock(devlink);
 255 }
 256 EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
 257
 258 static int
 259 devlink_nl_health_reporter_fill(struct sk_buff *msg,
 260                                 struct devlink_health_reporter *reporter,
 261                                 enum devlink_command cmd, u32 portid,
 262                                 u32 seq, int flags)
 263 {
 264         struct devlink *devlink = reporter->devlink;
 265         struct nlattr *reporter_attr;
 266         void *hdr;
 267
 268         hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
 269         if (!hdr)
 270                 return -EMSGSIZE;
 271
 272         if (devlink_nl_put_handle(msg, devlink))
 273                 goto genlmsg_cancel;
 274
 275         if (reporter->devlink_port) {
 276                 if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
 277                         goto genlmsg_cancel;
 278         }
 279         reporter_attr = nla_nest_start_noflag(msg,
 280                                               DEVLINK_ATTR_HEALTH_REPORTER);
 281         if (!reporter_attr)
 282                 goto genlmsg_cancel;
 283         if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
 284                            reporter->ops->name))
 285                 goto reporter_nest_cancel;
 286         if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
 287                        reporter->health_state))
 288                 goto reporter_nest_cancel;
 289         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
 290                               reporter->error_count, DEVLINK_ATTR_PAD))
 291                 goto reporter_nest_cancel;
 292         if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
 293                               reporter->recovery_count, DEVLINK_ATTR_PAD))
 294                 goto reporter_nest_cancel;
 295         if (reporter->ops->recover &&
 296             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
 297                               reporter->graceful_period,
 298                               DEVLINK_ATTR_PAD))
 299                 goto reporter_nest_cancel;
 300         if (reporter->ops->recover &&
 301             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
 302                        reporter->auto_recover))
 303                 goto reporter_nest_cancel;
 304         if (reporter->dump_fmsg &&
 305             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
 306                               jiffies_to_msecs(reporter->dump_ts),
 307                               DEVLINK_ATTR_PAD))
 308                 goto reporter_nest_cancel;
 309         if (reporter->dump_fmsg &&
 310             nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
 311                               reporter->dump_real_ts, DEVLINK_ATTR_PAD))
 312                 goto reporter_nest_cancel;
 313         if (reporter->ops->dump &&
 314             nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
 315                        reporter->auto_dump))
 316                 goto reporter_nest_cancel;
 317
 318         nla_nest_end(msg, reporter_attr);
 319         genlmsg_end(msg, hdr);
 320         return 0;
 321
 322 reporter_nest_cancel:
 323         nla_nest_cancel(msg, reporter_attr);
 324 genlmsg_cancel:
 325         genlmsg_cancel(msg, hdr);
 326         return -EMSGSIZE;
 327 }
 328
 329 static struct devlink_health_reporter *
 330 devlink_health_reporter_get_from_attrs(struct devlink *devlink,
 331                                        struct nlattr **attrs)
 332 {
 333         struct devlink_port *devlink_port;
 334         char *reporter_name;
 335
 336         if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
 337                 return NULL;
 338
 339         reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
 340         devlink_port = devlink_port_get_from_attrs(devlink, attrs);
 341         if (IS_ERR(devlink_port))
 342                 return devlink_health_reporter_find_by_name(devlink,
 343                                                             reporter_name);
 344         else
 345                 return devlink_port_health_reporter_find_by_name(devlink_port,
 346                                                                  reporter_name);
 347 }
 348
 349 static struct devlink_health_reporter *
 350 devlink_health_reporter_get_from_info(struct devlink *devlink,
 351                                       struct genl_info *info)
 352 {
 353         return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
 354 }
 355
 356 int devlink_nl_health_reporter_get_doit(struct sk_buff *skb,
 357                                         struct genl_info *info)
 358 {
 359         struct devlink *devlink = info->user_ptr[0];
 360         struct devlink_health_reporter *reporter;
 361         struct sk_buff *msg;
 362         int err;
 363
 364         reporter = devlink_health_reporter_get_from_info(devlink, info);
 365         if (!reporter)
 366                 return -EINVAL;
 367
 368         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 369         if (!msg)
 370                 return -ENOMEM;
 371
 372         err = devlink_nl_health_reporter_fill(msg, reporter,
 373                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
 374                                               info->snd_portid, info->snd_seq,
 375                                               0);
 376         if (err) {
 377                 nlmsg_free(msg);
 378                 return err;
 379         }
 380
 381         return genlmsg_reply(msg, info);
 382 }
 383
 384 static int devlink_nl_health_reporter_get_dump_one(struct sk_buff *msg,
 385                                                    struct devlink *devlink,
 386                                                    struct netlink_callback *cb,
 387                                                    int flags)
 388 {
 389         struct devlink_nl_dump_state *state = devlink_dump_state(cb);
 390         const struct genl_info *info = genl_info_dump(cb);
 391         struct devlink_health_reporter *reporter;
 392         unsigned long port_index_end = ULONG_MAX;
 393         struct nlattr **attrs = info->attrs;
 394         unsigned long port_index_start = 0;
 395         struct devlink_port *port;
 396         unsigned long port_index;
 397         int idx = 0;
 398         int err;
 399
 400         if (attrs && attrs[DEVLINK_ATTR_PORT_INDEX]) {
 401                 port_index_start = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
 402                 port_index_end = port_index_start;
 403                 flags |= NLM_F_DUMP_FILTERED;
 404                 goto per_port_dump;
 405         }
 406
 407         list_for_each_entry(reporter, &devlink->reporter_list, list) {
 408                 if (idx < state->idx) {
 409                         idx++;
 410                         continue;
 411                 }
 412                 err = devlink_nl_health_reporter_fill(msg, reporter,
 413                                                       DEVLINK_CMD_HEALTH_REPORTER_GET,
 414                                                       NETLINK_CB(cb->skb).portid,
 415                                                       cb->nlh->nlmsg_seq,
 416                                                       flags);
 417                 if (err) {
 418                         state->idx = idx;
 419                         return err;
 420                 }
 421                 idx++;
 422         }
 423 per_port_dump:
 424         xa_for_each_range(&devlink->ports, port_index, port,
 425                           port_index_start, port_index_end) {
 426                 list_for_each_entry(reporter, &port->reporter_list, list) {
 427                         if (idx < state->idx) {
 428                                 idx++;
 429                                 continue;
 430                         }
 431                         err = devlink_nl_health_reporter_fill(msg, reporter,
 432                                                               DEVLINK_CMD_HEALTH_REPORTER_GET,
 433                                                               NETLINK_CB(cb->skb).portid,
 434                                                               cb->nlh->nlmsg_seq,
 435                                                               flags);
 436                         if (err) {
 437                                 state->idx = idx;
 438                                 return err;
 439                         }
 440                         idx++;
 441                 }
 442         }
 443
 444         return 0;
 445 }
 446
 447 int devlink_nl_health_reporter_get_dumpit(struct sk_buff *skb,
 448                                           struct netlink_callback *cb)
 449 {
 450         return devlink_nl_dumpit(skb, cb,
 451                                  devlink_nl_health_reporter_get_dump_one);
 452 }
 453
 454 int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 455                                             struct genl_info *info)
 456 {
 457         struct devlink *devlink = info->user_ptr[0];
 458         struct devlink_health_reporter *reporter;
 459
 460         reporter = devlink_health_reporter_get_from_info(devlink, info);
 461         if (!reporter)
 462                 return -EINVAL;
 463
 464         if (!reporter->ops->recover &&
 465             (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
 466              info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
 467                 return -EOPNOTSUPP;
 468
 469         if (!reporter->ops->dump &&
 470             info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
 471                 return -EOPNOTSUPP;
 472
 473         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
 474                 reporter->graceful_period =
 475                         nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
 476
 477         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
 478                 reporter->auto_recover =
 479                         nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
 480
 481         if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
 482                 reporter->auto_dump =
 483                 nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
 484
 485         return 0;
 486 }
 487
 488 static void devlink_recover_notify(struct devlink_health_reporter *reporter,
 489                                    enum devlink_command cmd)
 490 {
 491         struct devlink *devlink = reporter->devlink;
 492         struct sk_buff *msg;
 493         int err;
 494
 495         WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
 496         ASSERT_DEVLINK_REGISTERED(devlink);
 497
 498         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 499         if (!msg)
 500                 return;
 501
 502         err = devlink_nl_health_reporter_fill(msg, reporter, cmd, 0, 0, 0);
 503         if (err) {
 504                 nlmsg_free(msg);
 505                 return;
 506         }
 507
 508         genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
 509                                 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
 510 }
 511
 512 void
 513 devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
 514 {
 515         reporter->recovery_count++;
 516         reporter->last_recovery_ts = jiffies;
 517 }
 518 EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
 519
 520 static int
 521 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
 522                                 void *priv_ctx, struct netlink_ext_ack *extack)
 523 {
 524         int err;
 525
 526         if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
 527                 return 0;
 528
 529         if (!reporter->ops->recover)
 530                 return -EOPNOTSUPP;
 531
 532         err = reporter->ops->recover(reporter, priv_ctx, extack);
 533         if (err)
 534                 return err;
 535
 536         devlink_health_reporter_recovery_done(reporter);
 537         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
 538         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
 539
 540         return 0;
 541 }
 542
 543 static void
 544 devlink_health_dump_clear(struct devlink_health_reporter *reporter)
 545 {
 546         if (!reporter->dump_fmsg)
 547                 return;
 548         devlink_fmsg_free(reporter->dump_fmsg);
 549         reporter->dump_fmsg = NULL;
 550 }
 551
 552 static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
 553                                   void *priv_ctx,
 554                                   struct netlink_ext_ack *extack)
 555 {
 556         int err;
 557
 558         if (!reporter->ops->dump)
 559                 return 0;
 560
 561         if (reporter->dump_fmsg)
 562                 return 0;
 563
 564         reporter->dump_fmsg = devlink_fmsg_alloc();
 565         if (!reporter->dump_fmsg) {
 566                 err = -ENOMEM;
 567                 return err;
 568         }
 569
 570         err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
 571         if (err)
 572                 goto dump_err;
 573
 574         err = reporter->ops->dump(reporter, reporter->dump_fmsg,
 575                                   priv_ctx, extack);
 576         if (err)
 577                 goto dump_err;
 578
 579         err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
 580         if (err)
 581                 goto dump_err;
 582
 583         reporter->dump_ts = jiffies;
 584         reporter->dump_real_ts = ktime_get_real_ns();
 585
 586         return 0;
 587
 588 dump_err:
 589         devlink_health_dump_clear(reporter);
 590         return err;
 591 }
 592
 593 int devlink_health_report(struct devlink_health_reporter *reporter,
 594                           const char *msg, void *priv_ctx)
 595 {
 596         enum devlink_health_reporter_state prev_health_state;
 597         struct devlink *devlink = reporter->devlink;
 598         unsigned long recover_ts_threshold;
 599         int ret;
 600
 601         /* write a log message of the current error */
 602         WARN_ON(!msg);
 603         trace_devlink_health_report(devlink, reporter->ops->name, msg);
 604         reporter->error_count++;
 605         prev_health_state = reporter->health_state;
 606         reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
 607         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
 608
 609         /* abort if the previous error wasn't recovered */
 610         recover_ts_threshold = reporter->last_recovery_ts +
 611                                msecs_to_jiffies(reporter->graceful_period);
 612         if (reporter->auto_recover &&
 613             (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
 614              (reporter->last_recovery_ts && reporter->recovery_count &&
 615               time_is_after_jiffies(recover_ts_threshold)))) {
 616                 trace_devlink_health_recover_aborted(devlink,
 617                                                      reporter->ops->name,
 618                                                      reporter->health_state,
 619                                                      jiffies -
 620                                                      reporter->last_recovery_ts);
 621                 return -ECANCELED;
 622         }
 623
 624         if (reporter->auto_dump) {
 625                 devl_lock(devlink);
 626                 /* store current dump of current error, for later analysis */
 627                 devlink_health_do_dump(reporter, priv_ctx, NULL);
 628                 devl_unlock(devlink);
 629         }
 630
 631         if (!reporter->auto_recover)
 632                 return 0;
 633
 634         devl_lock(devlink);
 635         ret = devlink_health_reporter_recover(reporter, priv_ctx, NULL);
 636         devl_unlock(devlink);
 637
 638         return ret;
 639 }
 640 EXPORT_SYMBOL_GPL(devlink_health_report);
 641
 642 void
 643 devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
 644                                      enum devlink_health_reporter_state state)
 645 {
 646         if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
 647                     state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
 648                 return;
 649
 650         if (reporter->health_state == state)
 651                 return;
 652
 653         reporter->health_state = state;
 654         trace_devlink_health_reporter_state_update(reporter->devlink,
 655                                                    reporter->ops->name, state);
 656         devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
 657 }
 658 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
 659
 660 int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
 661                                                 struct genl_info *info)
 662 {
 663         struct devlink *devlink = info->user_ptr[0];
 664         struct devlink_health_reporter *reporter;
 665
 666         reporter = devlink_health_reporter_get_from_info(devlink, info);
 667         if (!reporter)
 668                 return -EINVAL;
 669
 670         return devlink_health_reporter_recover(reporter, NULL, info->extack);
 671 }
 672
 673 static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
 674                                     int attrtype)
 675 {
 676         struct devlink_fmsg_item *item;
 677
 678         item = kzalloc(sizeof(*item), GFP_KERNEL);
 679         if (!item)
 680                 return -ENOMEM;
 681
 682         item->attrtype = attrtype;
 683         list_add_tail(&item->list, &fmsg->item_list);
 684
 685         return 0;
 686 }
 687
 688 int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
 689 {
 690         if (fmsg->putting_binary)
 691                 return -EINVAL;
 692
 693         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
 694 }
 695 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
 696
 697 static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
 698 {
 699         if (fmsg->putting_binary)
 700                 return -EINVAL;
 701
 702         return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
 703 }
 704
 705 int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
 706 {
 707         if (fmsg->putting_binary)
 708                 return -EINVAL;
 709
 710         return devlink_fmsg_nest_end(fmsg);
 711 }
 712 EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
 713
 714 #define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
 715
 716 static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
 717 {
 718         struct devlink_fmsg_item *item;
 719
 720         if (fmsg->putting_binary)
 721                 return -EINVAL;
 722
 723         if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
 724                 return -EMSGSIZE;
 725
 726         item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
 727         if (!item)
 728                 return -ENOMEM;
 729
 730         item->nla_type = NLA_NUL_STRING;
 731         item->len = strlen(name) + 1;
 732         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
 733         memcpy(&item->value, name, item->len);
 734         list_add_tail(&item->list, &fmsg->item_list);
 735
 736         return 0;
 737 }
 738
 739 int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
 740 {
 741         int err;
 742
 743         if (fmsg->putting_binary)
 744                 return -EINVAL;
 745
 746         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
 747         if (err)
 748                 return err;
 749
 750         err = devlink_fmsg_put_name(fmsg, name);
 751         if (err)
 752                 return err;
 753
 754         return 0;
 755 }
 756 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
 757
 758 int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
 759 {
 760         if (fmsg->putting_binary)
 761                 return -EINVAL;
 762
 763         return devlink_fmsg_nest_end(fmsg);
 764 }
 765 EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
 766
 767 int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
 768                                      const char *name)
 769 {
 770         int err;
 771
 772         if (fmsg->putting_binary)
 773                 return -EINVAL;
 774
 775         err = devlink_fmsg_pair_nest_start(fmsg, name);
 776         if (err)
 777                 return err;
 778
 779         err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
 780         if (err)
 781                 return err;
 782
 783         return 0;
 784 }
 785 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
 786
 787 int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
 788 {
 789         int err;
 790
 791         if (fmsg->putting_binary)
 792                 return -EINVAL;
 793
 794         err = devlink_fmsg_nest_end(fmsg);
 795         if (err)
 796                 return err;
 797
 798         err = devlink_fmsg_nest_end(fmsg);
 799         if (err)
 800                 return err;
 801
 802         return 0;
 803 }
 804 EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
 805
 806 int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
 807                                         const char *name)
 808 {
 809         int err;
 810
 811         err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
 812         if (err)
 813                 return err;
 814
 815         fmsg->putting_binary = true;
 816         return err;
 817 }
 818 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
 819
 820 int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
 821 {
 822         if (!fmsg->putting_binary)
 823                 return -EINVAL;
 824
 825         fmsg->putting_binary = false;
 826         return devlink_fmsg_arr_pair_nest_end(fmsg);
 827 }
 828 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
 829
 830 static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
 831                                   const void *value, u16 value_len,
 832                                   u8 value_nla_type)
 833 {
 834         struct devlink_fmsg_item *item;
 835
 836         if (value_len > DEVLINK_FMSG_MAX_SIZE)
 837                 return -EMSGSIZE;
 838
 839         item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
 840         if (!item)
 841                 return -ENOMEM;
 842
 843         item->nla_type = value_nla_type;
 844         item->len = value_len;
 845         item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
 846         memcpy(&item->value, value, item->len);
 847         list_add_tail(&item->list, &fmsg->item_list);
 848
 849         return 0;
 850 }
 851
 852 static int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
 853 {
 854         if (fmsg->putting_binary)
 855                 return -EINVAL;
 856
 857         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
 858 }
 859
 860 static int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
 861 {
 862         if (fmsg->putting_binary)
 863                 return -EINVAL;
 864
 865         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
 866 }
 867
 868 int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
 869 {
 870         if (fmsg->putting_binary)
 871                 return -EINVAL;
 872
 873         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
 874 }
 875 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
 876
 877 static int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
 878 {
 879         if (fmsg->putting_binary)
 880                 return -EINVAL;
 881
 882         return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
 883 }
 884
 885 int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
 886 {
 887         if (fmsg->putting_binary)
 888                 return -EINVAL;
 889
 890         return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
 891                                       NLA_NUL_STRING);
 892 }
 893 EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
 894
 895 int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
 896                             u16 value_len)
 897 {
 898         if (!fmsg->putting_binary)
 899                 return -EINVAL;
 900
 901         return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
 902 }
 903 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
 904
 905 int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
 906                                bool value)
 907 {
 908         int err;
 909
 910         err = devlink_fmsg_pair_nest_start(fmsg, name);
 911         if (err)
 912                 return err;
 913
 914         err = devlink_fmsg_bool_put(fmsg, value);
 915         if (err)
 916                 return err;
 917
 918         err = devlink_fmsg_pair_nest_end(fmsg);
 919         if (err)
 920                 return err;
 921
 922         return 0;
 923 }
 924 EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
 925
 926 int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
 927                              u8 value)
 928 {
 929         int err;
 930
 931         err = devlink_fmsg_pair_nest_start(fmsg, name);
 932         if (err)
 933                 return err;
 934
 935         err = devlink_fmsg_u8_put(fmsg, value);
 936         if (err)
 937                 return err;
 938
 939         err = devlink_fmsg_pair_nest_end(fmsg);
 940         if (err)
 941                 return err;
 942
 943         return 0;
 944 }
 945 EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
 946
 947 int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
 948                               u32 value)
 949 {
 950         int err;
 951
 952         err = devlink_fmsg_pair_nest_start(fmsg, name);
 953         if (err)
 954                 return err;
 955
 956         err = devlink_fmsg_u32_put(fmsg, value);
 957         if (err)
 958                 return err;
 959
 960         err = devlink_fmsg_pair_nest_end(fmsg);
 961         if (err)
 962                 return err;
 963
 964         return 0;
 965 }
 966 EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
 967
 968 int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
 969                               u64 value)
 970 {
 971         int err;
 972
 973         err = devlink_fmsg_pair_nest_start(fmsg, name);
 974         if (err)
 975                 return err;
 976
 977         err = devlink_fmsg_u64_put(fmsg, value);
 978         if (err)
 979                 return err;
 980
 981         err = devlink_fmsg_pair_nest_end(fmsg);
 982         if (err)
 983                 return err;
 984
 985         return 0;
 986 }
 987 EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
 988
 989 int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
 990                                  const char *value)
 991 {
 992         int err;
 993
 994         err = devlink_fmsg_pair_nest_start(fmsg, name);
 995         if (err)
 996                 return err;
 997
 998         err = devlink_fmsg_string_put(fmsg, value);
 999         if (err)
1000                 return err;
1001
1002         err = devlink_fmsg_pair_nest_end(fmsg);
1003         if (err)
1004                 return err;
1005
1006         return 0;
1007 }
1008 EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
1009
1010 int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
1011                                  const void *value, u32 value_len)
1012 {
1013         u32 data_size;
1014         int end_err;
1015         u32 offset;
1016         int err;
1017
1018         err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
1019         if (err)
1020                 return err;
1021
1022         for (offset = 0; offset < value_len; offset += data_size) {
1023                 data_size = value_len - offset;
1024                 if (data_size > DEVLINK_FMSG_MAX_SIZE)
1025                         data_size = DEVLINK_FMSG_MAX_SIZE;
1026                 err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
1027                 if (err)
1028                         break;
1029                 /* Exit from loop with a break (instead of
1030                  * return) to make sure putting_binary is turned off in
1031                  * devlink_fmsg_binary_pair_nest_end
1032                  */
1033         }
1034
1035         end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
1036         if (end_err)
1037                 err = end_err;
1038
1039         return err;
1040 }
1041 EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
1042
1043 static int
1044 devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
1045 {
1046         switch (msg->nla_type) {
1047         case NLA_FLAG:
1048         case NLA_U8:
1049         case NLA_U32:
1050         case NLA_U64:
1051         case NLA_NUL_STRING:
1052         case NLA_BINARY:
1053                 return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
1054                                   msg->nla_type);
1055         default:
1056                 return -EINVAL;
1057         }
1058 }
1059
1060 static int
1061 devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
1062 {
1063         int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
1064         u8 tmp;
1065
1066         switch (msg->nla_type) {
1067         case NLA_FLAG:
1068                 /* Always provide flag data, regardless of its value */
1069                 tmp = *(bool *)msg->value;
1070
1071                 return nla_put_u8(skb, attrtype, tmp);
1072         case NLA_U8:
1073                 return nla_put_u8(skb, attrtype, *(u8 *)msg->value);
1074         case NLA_U32:
1075                 return nla_put_u32(skb, attrtype, *(u32 *)msg->value);
1076         case NLA_U64:
1077                 return nla_put_u64_64bit(skb, attrtype, *(u64 *)msg->value,
1078                                          DEVLINK_ATTR_PAD);
1079         case NLA_NUL_STRING:
1080                 return nla_put_string(skb, attrtype, (char *)&msg->value);
1081         case NLA_BINARY:
1082                 return nla_put(skb, attrtype, msg->len, (void *)&msg->value);
1083         default:
1084                 return -EINVAL;
1085         }
1086 }
1087
1088 static int
1089 devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
1090                          int *start)
1091 {
1092         struct devlink_fmsg_item *item;
1093         struct nlattr *fmsg_nlattr;
1094         int err = 0;
1095         int i = 0;
1096
1097         fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
1098         if (!fmsg_nlattr)
1099                 return -EMSGSIZE;
1100
1101         list_for_each_entry(item, &fmsg->item_list, list) {
1102                 if (i < *start) {
1103                         i++;
1104                         continue;
1105                 }
1106
1107                 switch (item->attrtype) {
1108                 case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
1109                 case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
1110                 case DEVLINK_ATTR_FMSG_ARR_NEST_START:
1111                 case DEVLINK_ATTR_FMSG_NEST_END:
1112                         err = nla_put_flag(skb, item->attrtype);
1113                         break;
1114                 case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
1115                         err = devlink_fmsg_item_fill_type(item, skb);
1116                         if (err)
1117                                 break;
1118                         err = devlink_fmsg_item_fill_data(item, skb);
1119                         break;
1120                 case DEVLINK_ATTR_FMSG_OBJ_NAME:
1121                         err = nla_put_string(skb, item->attrtype,
1122                                              (char *)&item->value);
1123                         break;
1124                 default:
1125                         err = -EINVAL;
1126                         break;
1127                 }
1128                 if (!err)
1129                         *start = ++i;
1130                 else
1131                         break;
1132         }
1133
1134         nla_nest_end(skb, fmsg_nlattr);
1135         return err;
1136 }
1137
1138 static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
1139                             struct genl_info *info,
1140                             enum devlink_command cmd, int flags)
1141 {
1142         struct nlmsghdr *nlh;
1143         struct sk_buff *skb;
1144         bool last = false;
1145         int index = 0;
1146         void *hdr;
1147         int err;
1148
1149         while (!last) {
1150                 int tmp_index = index;
1151
1152                 skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1153                 if (!skb)
1154                         return -ENOMEM;
1155
1156                 hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
1157                                   &devlink_nl_family, flags | NLM_F_MULTI, cmd);
1158                 if (!hdr) {
1159                         err = -EMSGSIZE;
1160                         goto nla_put_failure;
1161                 }
1162
1163                 err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
1164                 if (!err)
1165                         last = true;
1166                 else if (err != -EMSGSIZE || tmp_index == index)
1167                         goto nla_put_failure;
1168
1169                 genlmsg_end(skb, hdr);
1170                 err = genlmsg_reply(skb, info);
1171                 if (err)
1172                         return err;
1173         }
1174
1175         skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
1176         if (!skb)
1177                 return -ENOMEM;
1178         nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
1179                         NLMSG_DONE, 0, flags | NLM_F_MULTI);
1180         if (!nlh) {
1181                 err = -EMSGSIZE;
1182                 goto nla_put_failure;
1183         }
1184
1185         return genlmsg_reply(skb, info);
1186
1187 nla_put_failure:
1188         nlmsg_free(skb);
1189         return err;
1190 }
1191
1192 static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
1193                                struct netlink_callback *cb,
1194                                enum devlink_command cmd)
1195 {
1196         struct devlink_nl_dump_state *state = devlink_dump_state(cb);
1197         int index = state->idx;
1198         int tmp_index = index;
1199         void *hdr;
1200         int err;
1201
1202         hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1203                           &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
1204         if (!hdr) {
1205                 err = -EMSGSIZE;
1206                 goto nla_put_failure;
1207         }
1208
1209         err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
1210         if ((err && err != -EMSGSIZE) || tmp_index == index)
1211                 goto nla_put_failure;
1212
1213         state->idx = index;
1214         genlmsg_end(skb, hdr);
1215         return skb->len;
1216
1217 nla_put_failure:
1218         genlmsg_cancel(skb, hdr);
1219         return err;
1220 }
1221
1222 int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
1223                                                  struct genl_info *info)
1224 {
1225         struct devlink *devlink = info->user_ptr[0];
1226         struct devlink_health_reporter *reporter;
1227         struct devlink_fmsg *fmsg;
1228         int err;
1229
1230         reporter = devlink_health_reporter_get_from_info(devlink, info);
1231         if (!reporter)
1232                 return -EINVAL;
1233
1234         if (!reporter->ops->diagnose)
1235                 return -EOPNOTSUPP;
1236
1237         fmsg = devlink_fmsg_alloc();
1238         if (!fmsg)
1239                 return -ENOMEM;
1240
1241         err = devlink_fmsg_obj_nest_start(fmsg);
1242         if (err)
1243                 goto out;
1244
1245         err = reporter->ops->diagnose(reporter, fmsg, info->extack);
1246         if (err)
1247                 goto out;
1248
1249         err = devlink_fmsg_obj_nest_end(fmsg);
1250         if (err)
1251                 goto out;
1252
1253         err = devlink_fmsg_snd(fmsg, info,
1254                                DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
1255
1256 out:
1257         devlink_fmsg_free(fmsg);
1258         return err;
1259 }
1260
1261 static struct devlink_health_reporter *
1262 devlink_health_reporter_get_from_cb_lock(struct netlink_callback *cb)
1263 {
1264         const struct genl_info *info = genl_info_dump(cb);
1265         struct devlink_health_reporter *reporter;
1266         struct nlattr **attrs = info->attrs;
1267         struct devlink *devlink;
1268
1269         devlink = devlink_get_from_attrs_lock(sock_net(cb->skb->sk), attrs);
1270         if (IS_ERR(devlink))
1271                 return NULL;
1272
1273         reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
1274         if (!reporter) {
1275                 devl_unlock(devlink);
1276                 devlink_put(devlink);
1277         }
1278         return reporter;
1279 }
1280
1281 int devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
1282                                                    struct netlink_callback *cb)
1283 {
1284         struct devlink_nl_dump_state *state = devlink_dump_state(cb);
1285         struct devlink_health_reporter *reporter;
1286         struct devlink *devlink;
1287         int err;
1288
1289         reporter = devlink_health_reporter_get_from_cb_lock(cb);
1290         if (!reporter)
1291                 return -EINVAL;
1292
1293         devlink = reporter->devlink;
1294         if (!reporter->ops->dump) {
1295                 devl_unlock(devlink);
1296                 devlink_put(devlink);
1297                 return -EOPNOTSUPP;
1298         }
1299
1300         if (!state->idx) {
1301                 err = devlink_health_do_dump(reporter, NULL, cb->extack);
1302                 if (err)
1303                         goto unlock;
1304                 state->dump_ts = reporter->dump_ts;
1305         }
1306         if (!reporter->dump_fmsg || state->dump_ts != reporter->dump_ts) {
1307                 NL_SET_ERR_MSG(cb->extack, "Dump trampled, please retry");
1308                 err = -EAGAIN;
1309                 goto unlock;
1310         }
1311
1312         err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
1313                                   DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
1314 unlock:
1315         devl_unlock(devlink);
1316         devlink_put(devlink);
1317         return err;
1318 }
1319
1320 int devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
1321                                                    struct genl_info *info)
1322 {
1323         struct devlink *devlink = info->user_ptr[0];
1324         struct devlink_health_reporter *reporter;
1325
1326         reporter = devlink_health_reporter_get_from_info(devlink, info);
1327         if (!reporter)
1328                 return -EINVAL;
1329
1330         if (!reporter->ops->dump)
1331                 return -EOPNOTSUPP;
1332
1333         devlink_health_dump_clear(reporter);
1334         return 0;
1335 }
1336
1337 int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
1338                                              struct genl_info *info)
1339 {
1340         struct devlink *devlink = info->user_ptr[0];
1341         struct devlink_health_reporter *reporter;
1342
1343         reporter = devlink_health_reporter_get_from_info(devlink, info);
1344         if (!reporter)
1345                 return -EINVAL;
1346
1347         if (!reporter->ops->test)
1348                 return -EOPNOTSUPP;
1349
1350         return reporter->ops->test(reporter, info->extack);
1351 }