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