lustre/mdt/mdt_coordinator.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License version 2 for more details.  A copy is
  14  * included in the COPYING file that accompanied this code.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2011, 2012 Commissariat a l'energie atomique et aux energies
  24  *                          alternatives
  25  *
  26  * Copyright (c) 2013, 2017, Intel Corporation.
  27  * Use is subject to license terms.
  28  */
  29 /*
  30  * lustre/mdt/mdt_coordinator.c
  31  *
  32  * Lustre HSM Coordinator
  33  *
  34  * Author: Jacques-Charles Lafoucriere <jacques-charles.lafoucriere@cea.fr>
  35  * Author: Aurelien Degremont <aurelien.degremont@cea.fr>
  36  * Author: Thomas Leibovici <thomas.leibovici@cea.fr>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_MDS
  40
  41 #include <linux/kthread.h>
  42 #include <obd_support.h>
  43 #include <lustre_export.h>
  44 #include <obd.h>
  45 #include <lprocfs_status.h>
  46 #include <lustre_log.h>
  47 #include <lustre_kernelcomm.h>
  48 #include "mdt_internal.h"
  49
  50 static struct lprocfs_vars lprocfs_mdt_hsm_vars[];
  51
  52 /**
  53  * get obj and HSM attributes on a fid
  54  * \param mti [IN] context
  55  * \param fid [IN] object fid
  56  * \param hsm [OUT] HSM meta data
  57  * \retval obj or error (-ENOENT if not found)
  58  */
  59 struct mdt_object *mdt_hsm_get_md_hsm(struct mdt_thread_info *mti,
  60                                       const struct lu_fid *fid,
  61                                       struct md_hsm *hsm)
  62 {
  63         struct md_attr          *ma;
  64         struct mdt_object       *obj;
  65         int                      rc;
  66         ENTRY;
  67
  68         ma = &mti->mti_attr;
  69         ma->ma_need = MA_HSM;
  70         ma->ma_valid = 0;
  71
  72         /* find object by FID */
  73         obj = mdt_object_find(mti->mti_env, mti->mti_mdt, fid);
  74         if (IS_ERR(obj))
  75                 RETURN(obj);
  76
  77         if (!mdt_object_exists(obj)) {
  78                 /* no more object */
  79                 mdt_object_put(mti->mti_env, obj);
  80                 RETURN(ERR_PTR(-ENOENT));
  81         }
  82
  83         rc = mdt_attr_get_complex(mti, obj, ma);
  84         if (rc) {
  85                 mdt_object_put(mti->mti_env, obj);
  86                 RETURN(ERR_PTR(rc));
  87         }
  88
  89         if (ma->ma_valid & MA_HSM)
  90                 *hsm = ma->ma_hsm;
  91         else
  92                 memset(hsm, 0, sizeof(*hsm));
  93         ma->ma_valid = 0;
  94         RETURN(obj);
  95 }
  96
  97 void mdt_hsm_dump_hal(int level, const char *prefix,
  98                       struct hsm_action_list *hal)
  99 {
 100         int                      i, sz;
 101         struct hsm_action_item  *hai;
 102         char                     buf[12];
 103
 104         CDEBUG(level, "%s: HAL header: version %X count %d compound %#llx"
 105                       " archive_id %d flags %#llx\n",
 106                prefix, hal->hal_version, hal->hal_count,
 107                hal->hal_compound_id, hal->hal_archive_id, hal->hal_flags);
 108
 109         hai = hai_first(hal);
 110         for (i = 0; i < hal->hal_count; i++) {
 111                 sz = hai->hai_len - sizeof(*hai);
 112                 CDEBUG(level, "%s %d: fid="DFID" dfid="DFID
 113                        " compound/cookie=%#llx/%#llx"
 114                        " action=%s extent=%#llx-%#llx gid=%#llx"
 115                        " datalen=%d data=[%s]\n",
 116                        prefix, i,
 117                        PFID(&hai->hai_fid), PFID(&hai->hai_dfid),
 118                        hal->hal_compound_id, hai->hai_cookie,
 119                        hsm_copytool_action2name(hai->hai_action),
 120                        hai->hai_extent.offset,
 121                        hai->hai_extent.length,
 122                        hai->hai_gid, sz,
 123                        hai_dump_data_field(hai, buf, sizeof(buf)));
 124                 hai = hai_next(hai);
 125         }
 126 }
 127
 128 /**
 129  * data passed to llog_cat_process() callback
 130  * to scan requests and take actions
 131  */
 132 struct hsm_scan_request {
 133         int                      hal_sz;
 134         int                      hal_used_sz;
 135         struct hsm_action_list  *hal;
 136 };
 137
 138 struct hsm_scan_data {
 139         struct mdt_thread_info          *mti;
 140         char                             fs_name[MTI_NAME_MAXLEN+1];
 141         /* are we scanning the logs for housekeeping, or just looking
 142          * for new work?
 143          */
 144         bool                             housekeeping;
 145         /* request to be send to agents */
 146         int                              max_requests;  /** vector size */
 147         int                              request_cnt;   /** used count */
 148         struct hsm_scan_request         *request;
 149 };
 150
 151 struct hsm_thread_data {
 152         struct mdt_thread_info  *cdt_mti;
 153         struct hsm_scan_request *request;
 154 };
 155
 156 static int mdt_cdt_waiting_cb(const struct lu_env *env,
 157                               struct mdt_device *mdt,
 158                               struct llog_handle *llh,
 159                               struct llog_agent_req_rec *larr,
 160                               struct hsm_scan_data *hsd)
 161 {
 162         struct coordinator *cdt = &mdt->mdt_coordinator;
 163         struct hsm_scan_request *request;
 164         struct hsm_action_item *hai;
 165         int i;
 166
 167         /* Are agents full? */
 168         if (atomic_read(&cdt->cdt_request_count) >= cdt->cdt_max_requests)
 169                 RETURN(0);
 170
 171         /* first search whether the request is found in the list we
 172          * have built. */
 173         request = NULL;
 174         for (i = 0; i < hsd->request_cnt; i++) {
 175                 if (hsd->request[i].hal->hal_compound_id ==
 176                     larr->arr_compound_id) {
 177                         request = &hsd->request[i];
 178                         break;
 179                 }
 180         }
 181
 182         if (!request) {
 183                 struct hsm_action_list *hal;
 184
 185                 if (hsd->request_cnt == hsd->max_requests) {
 186                         if (!hsd->housekeeping) {
 187                                 /* The request array is full, stop
 188                                  * here. There might be more known
 189                                  * requests that could be merged, but
 190                                  * this avoid analyzing too many llogs
 191                                  * for minor gains. */
 192                                 RETURN(LLOG_PROC_BREAK);
 193                         } else {
 194                                 /* Unknown request and no more room
 195                                  * for a new request. Continue to scan
 196                                  * to find other entries for already
 197                                  * existing requests. */
 198                                 RETURN(0);
 199                         }
 200                 }
 201
 202                 request = &hsd->request[hsd->request_cnt];
 203
 204                 /* allocates hai vector size just needs to be large
 205                  * enough */
 206                 request->hal_sz = sizeof(*request->hal) +
 207                         cfs_size_round(MTI_NAME_MAXLEN + 1) +
 208                         2 * cfs_size_round(larr->arr_hai.hai_len);
 209                 OBD_ALLOC(hal, request->hal_sz);
 210                 if (!hal)
 211                         RETURN(-ENOMEM);
 212
 213                 hal->hal_version = HAL_VERSION;
 214                 strlcpy(hal->hal_fsname, hsd->fs_name, MTI_NAME_MAXLEN + 1);
 215                 hal->hal_compound_id = larr->arr_compound_id;
 216                 hal->hal_archive_id = larr->arr_archive_id;
 217                 hal->hal_flags = larr->arr_flags;
 218                 hal->hal_count = 0;
 219                 request->hal_used_sz = hal_size(hal);
 220                 request->hal = hal;
 221                 hsd->request_cnt++;
 222                 hai = hai_first(hal);
 223         } else {
 224                 /* request is known */
 225                 /* we check if record archive num is the same as the
 226                  * known request, if not we will serve it in multiple
 227                  * time because we do not know if the agent can serve
 228                  * multiple backend a use case is a compound made of
 229                  * multiple restore where the files are not archived
 230                  * in the same backend */
 231                 if (larr->arr_archive_id != request->hal->hal_archive_id)
 232                         RETURN(0);
 233
 234                 if (request->hal_sz < request->hal_used_sz +
 235                     cfs_size_round(larr->arr_hai.hai_len)) {
 236                         /* Not enough room, need an extension */
 237                         void *hal_buffer;
 238                         int sz;
 239
 240                         sz = 2 * request->hal_sz;
 241                         OBD_ALLOC(hal_buffer, sz);
 242                         if (!hal_buffer)
 243                                 RETURN(-ENOMEM);
 244                         memcpy(hal_buffer, request->hal, request->hal_used_sz);
 245                         OBD_FREE(request->hal, request->hal_sz);
 246                         request->hal = hal_buffer;
 247                         request->hal_sz = sz;
 248                 }
 249
 250                 hai = hai_first(request->hal);
 251                 for (i = 0; i < request->hal->hal_count; i++)
 252                         hai = hai_next(hai);
 253         }
 254
 255         memcpy(hai, &larr->arr_hai, larr->arr_hai.hai_len);
 256         hai->hai_cookie = larr->arr_hai.hai_cookie;
 257         hai->hai_gid = larr->arr_hai.hai_gid;
 258
 259         request->hal_used_sz += cfs_size_round(hai->hai_len);
 260         request->hal->hal_count++;
 261
 262         if (hai->hai_action != HSMA_CANCEL)
 263                 cdt_agent_record_hash_add(cdt, hai->hai_cookie,
 264                                           llh->lgh_hdr->llh_cat_idx,
 265                                           larr->arr_hdr.lrh_index);
 266
 267         RETURN(0);
 268 }
 269
 270 static int mdt_cdt_started_cb(const struct lu_env *env,
 271                               struct mdt_device *mdt,
 272                               struct llog_handle *llh,
 273                               struct llog_agent_req_rec *larr,
 274                               struct hsm_scan_data *hsd)
 275 {
 276         struct coordinator *cdt = &mdt->mdt_coordinator;
 277         struct hsm_action_item *hai = &larr->arr_hai;
 278         struct cdt_agent_req *car;
 279         time64_t now = ktime_get_real_seconds();
 280         time64_t last;
 281         int cl_flags;
 282         int rc;
 283
 284         if (!hsd->housekeeping)
 285                 RETURN(0);
 286
 287         /* we search for a running request
 288          * error may happen if coordinator crashes or stopped
 289          * with running request
 290          */
 291         car = mdt_cdt_find_request(cdt, hai->hai_cookie);
 292         if (car == NULL) {
 293                 last = larr->arr_req_change;
 294         } else {
 295                 last = car->car_req_update;
 296         }
 297
 298         /* test if request too long, if yes cancel it
 299          * the same way the copy tool acknowledge a cancel request */
 300         if (now <= last + cdt->cdt_active_req_timeout)
 301                 GOTO(out_car, rc = 0);
 302
 303         dump_llog_agent_req_rec("request timed out, start cleaning", larr);
 304
 305         if (car != NULL) {
 306                 car->car_req_update = now;
 307                 mdt_hsm_agent_update_statistics(cdt, 0, 1, 0, &car->car_uuid);
 308                 /* Remove car from memory list (LU-9075) */
 309                 mdt_cdt_remove_request(cdt, hai->hai_cookie);
 310         }
 311
 312         /* Emit a changelog record for the failed action.*/
 313         cl_flags = 0;
 314         hsm_set_cl_error(&cl_flags, ECANCELED);
 315
 316         switch (hai->hai_action) {
 317         case HSMA_ARCHIVE:
 318                 hsm_set_cl_event(&cl_flags, HE_ARCHIVE);
 319                 break;
 320         case HSMA_RESTORE:
 321                 hsm_set_cl_event(&cl_flags, HE_RESTORE);
 322                 break;
 323         case HSMA_REMOVE:
 324                 hsm_set_cl_event(&cl_flags, HE_REMOVE);
 325                 break;
 326         case HSMA_CANCEL:
 327                 hsm_set_cl_event(&cl_flags, HE_CANCEL);
 328                 break;
 329         default:
 330                 /* Unknown record type, skip changelog. */
 331                 cl_flags = 0;
 332                 break;
 333         }
 334
 335         if (cl_flags != 0)
 336                 mo_changelog(env, CL_HSM, cl_flags, mdt->mdt_child,
 337                              &hai->hai_fid);
 338
 339         if (hai->hai_action == HSMA_RESTORE)
 340                 cdt_restore_handle_del(hsd->mti, cdt, &hai->hai_fid);
 341
 342         larr->arr_status = ARS_CANCELED;
 343         larr->arr_req_change = now;
 344         rc = llog_write(hsd->mti->mti_env, llh, &larr->arr_hdr,
 345                         larr->arr_hdr.lrh_index);
 346         if (rc < 0) {
 347                 CERROR("%s: cannot update agent log: rc = %d\n",
 348                        mdt_obd_name(mdt), rc);
 349                 rc = LLOG_DEL_RECORD;
 350         }
 351
 352         /* ct has completed a request, so a slot is available,
 353          * signal the coordinator to find new work */
 354         mdt_hsm_cdt_event(cdt);
 355 out_car:
 356         if (car != NULL)
 357                 mdt_cdt_put_request(car);
 358
 359         RETURN(rc);
 360 }
 361
 362 /**
 363  *  llog_cat_process() callback, used to:
 364  *  - find waiting request and start action
 365  *  - purge canceled and done requests
 366  * \param env [IN] environment
 367  * \param llh [IN] llog handle
 368  * \param hdr [IN] llog record
 369  * \param data [IN/OUT] cb data = struct hsm_scan_data
 370  * \retval 0 success
 371  * \retval -ve failure
 372  */
 373 static int mdt_coordinator_cb(const struct lu_env *env,
 374                               struct llog_handle *llh,
 375                               struct llog_rec_hdr *hdr,
 376                               void *data)
 377 {
 378         struct llog_agent_req_rec *larr = (struct llog_agent_req_rec *)hdr;
 379         struct hsm_scan_data *hsd = data;
 380         struct mdt_device *mdt = hsd->mti->mti_mdt;
 381         struct coordinator *cdt = &mdt->mdt_coordinator;
 382         ENTRY;
 383
 384         larr = (struct llog_agent_req_rec *)hdr;
 385         dump_llog_agent_req_rec("mdt_coordinator_cb(): ", larr);
 386         switch (larr->arr_status) {
 387         case ARS_WAITING:
 388                 RETURN(mdt_cdt_waiting_cb(env, mdt, llh, larr, hsd));
 389         case ARS_STARTED:
 390                 RETURN(mdt_cdt_started_cb(env, mdt, llh, larr, hsd));
 391         default:
 392                 if (!hsd->housekeeping)
 393                         RETURN(0);
 394
 395                 if ((larr->arr_req_change + cdt->cdt_grace_delay) <
 396                     ktime_get_real_seconds()) {
 397                         cdt_agent_record_hash_del(cdt,
 398                                                   larr->arr_hai.hai_cookie);
 399                         RETURN(LLOG_DEL_RECORD);
 400                 }
 401
 402                 RETURN(0);
 403         }
 404 }
 405
 406 /**
 407  * create /proc entries for coordinator
 408  * \param mdt [IN]
 409  * \retval 0 success
 410  * \retval -ve failure
 411  */
 412 int hsm_cdt_procfs_init(struct mdt_device *mdt)
 413 {
 414         struct coordinator      *cdt = &mdt->mdt_coordinator;
 415         int                      rc = 0;
 416         ENTRY;
 417
 418         /* init /proc entries, failure is not critical */
 419         cdt->cdt_proc_dir = lprocfs_register("hsm",
 420                                              mdt2obd_dev(mdt)->obd_proc_entry,
 421                                              lprocfs_mdt_hsm_vars, mdt);
 422         if (IS_ERR(cdt->cdt_proc_dir)) {
 423                 rc = PTR_ERR(cdt->cdt_proc_dir);
 424                 CERROR("%s: Cannot create 'hsm' directory in mdt proc dir,"
 425                        " rc=%d\n", mdt_obd_name(mdt), rc);
 426                 cdt->cdt_proc_dir = NULL;
 427                 RETURN(rc);
 428         }
 429
 430         RETURN(0);
 431 }
 432
 433 /**
 434  * remove /proc entries for coordinator
 435  * \param mdt [IN]
 436  */
 437 void hsm_cdt_procfs_fini(struct mdt_device *mdt)
 438 {
 439         struct coordinator *cdt = &mdt->mdt_coordinator;
 440
 441         if (cdt->cdt_proc_dir != NULL)
 442                 lprocfs_remove(&cdt->cdt_proc_dir);
 443 }
 444
 445 /**
 446  * get vector of hsm cdt /proc vars
 447  * \param none
 448  * \retval var vector
 449  */
 450 struct lprocfs_vars *hsm_cdt_get_proc_vars(void)
 451 {
 452         return lprocfs_mdt_hsm_vars;
 453 }
 454
 455 /* Release the ressource used by the coordinator. Called when the
 456  * coordinator is stopping. */
 457 static void mdt_hsm_cdt_cleanup(struct mdt_device *mdt)
 458 {
 459         struct coordinator              *cdt = &mdt->mdt_coordinator;
 460         struct cdt_agent_req            *car, *tmp1;
 461         struct hsm_agent                *ha, *tmp2;
 462         struct cdt_restore_handle       *crh, *tmp3;
 463         struct mdt_thread_info          *cdt_mti;
 464
 465         /* start cleaning */
 466         down_write(&cdt->cdt_request_lock);
 467         list_for_each_entry_safe(car, tmp1, &cdt->cdt_request_list,
 468                                  car_request_list) {
 469                 cfs_hash_del(cdt->cdt_request_cookie_hash,
 470                              &car->car_hai->hai_cookie,
 471                              &car->car_cookie_hash);
 472                 list_del(&car->car_request_list);
 473                 mdt_cdt_put_request(car);
 474         }
 475         up_write(&cdt->cdt_request_lock);
 476
 477         down_write(&cdt->cdt_agent_lock);
 478         list_for_each_entry_safe(ha, tmp2, &cdt->cdt_agents, ha_list) {
 479                 list_del(&ha->ha_list);
 480                 OBD_FREE_PTR(ha);
 481         }
 482         up_write(&cdt->cdt_agent_lock);
 483
 484         cdt_mti = lu_context_key_get(&cdt->cdt_env.le_ctx, &mdt_thread_key);
 485         mutex_lock(&cdt->cdt_restore_lock);
 486         list_for_each_entry_safe(crh, tmp3, &cdt->cdt_restore_handle_list,
 487                                  crh_list) {
 488                 list_del(&crh->crh_list);
 489                 /* give back layout lock */
 490                 mdt_object_unlock(cdt_mti, NULL, &crh->crh_lh, 1);
 491                 OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
 492         }
 493         mutex_unlock(&cdt->cdt_restore_lock);
 494 }
 495
 496 /*
 497  * Coordinator state transition table, indexed on enum cdt_states, taking
 498  * from and to states. For instance since CDT_INIT to CDT_RUNNING is a
 499  * valid transition, cdt_transition[CDT_INIT][CDT_RUNNING] is true.
 500  */
 501 static bool cdt_transition[CDT_STATES_COUNT][CDT_STATES_COUNT] = {
 502         /* from -> to:    stopped init   running disable stopping */
 503         /* stopped */   { true,   true,  false,  false,  false },
 504         /* init */      { true,   false, true,   false,  false },
 505         /* running */   { false,  false, true,   true,   true },
 506         /* disable */   { false,  false, true,   true,   true },
 507         /* stopping */  { true,   false, false,  false,  false }
 508 };
 509
 510 /**
 511  * Change coordinator thread state
 512  * Some combinations are not valid, so catch them here.
 513  *
 514  * Returns 0 on success, with old_state set if not NULL, or -EINVAL if
 515  * the transition was not possible.
 516  */
 517 static int set_cdt_state_locked(struct coordinator *cdt,
 518                                 enum cdt_states new_state)
 519 {
 520         int rc;
 521         enum cdt_states state;
 522
 523         state = cdt->cdt_state;
 524
 525         if (cdt_transition[state][new_state]) {
 526                 cdt->cdt_state = new_state;
 527                 rc = 0;
 528         } else {
 529                 CDEBUG(D_HSM,
 530                        "unexpected coordinator transition, from=%s, to=%s\n",
 531                        cdt_mdt_state2str(state), cdt_mdt_state2str(new_state));
 532                 rc = -EINVAL;
 533         }
 534
 535         return rc;
 536 }
 537
 538 static int set_cdt_state(struct coordinator *cdt, enum cdt_states new_state)
 539 {
 540         int rc;
 541
 542         mutex_lock(&cdt->cdt_state_lock);
 543         rc = set_cdt_state_locked(cdt, new_state);
 544         mutex_unlock(&cdt->cdt_state_lock);
 545
 546         return rc;
 547 }
 548
 549
 550
 551 /**
 552  * coordinator thread
 553  * \param data [IN] obd device
 554  * \retval 0 success
 555  * \retval -ve failure
 556  */
 557 static int mdt_coordinator(void *data)
 558 {
 559         struct hsm_thread_data  *thread_data = data;
 560         struct mdt_thread_info  *mti = thread_data->cdt_mti;
 561         struct mdt_device       *mdt = mti->mti_mdt;
 562         struct coordinator      *cdt = &mdt->mdt_coordinator;
 563         struct hsm_scan_data     hsd = { NULL };
 564         time64_t                 last_housekeeping = 0;
 565         int                      rc = 0;
 566         int                      request_sz;
 567         ENTRY;
 568
 569         /* set up hsd->request and max_requests */
 570         hsd.max_requests = cdt->cdt_max_requests;
 571         request_sz = hsd.max_requests * sizeof(*hsd.request);
 572         hsd.request = thread_data->request;
 573
 574         CDEBUG(D_HSM, "%s: coordinator thread starting, pid=%d\n",
 575                mdt_obd_name(mdt), current_pid());
 576
 577         hsd.mti = mti;
 578         obd_uuid2fsname(hsd.fs_name, mdt_obd_name(mdt), MTI_NAME_MAXLEN);
 579
 580         set_cdt_state(cdt, CDT_RUNNING);
 581
 582         /* Inform mdt_hsm_cdt_start(). */
 583         wake_up_all(&cdt->cdt_waitq);
 584
 585         while (1) {
 586                 int i;
 587                 int update_idx = 0;
 588                 int updates_sz;
 589                 int updates_cnt;
 590                 struct hsm_record_update *updates;
 591
 592                 /* Limit execution of the expensive requests traversal
 593                  * to at most one second. This prevents repeatedly
 594                  * locking/unlocking the catalog for each request
 595                  * and preventing other HSM operations from happening
 596                  */
 597                 wait_event_interruptible_timeout(cdt->cdt_waitq,
 598                                                  kthread_should_stop() ||
 599                                                  cdt->cdt_wakeup_coordinator,
 600                                                  cfs_time_seconds(1));
 601
 602                 cdt->cdt_wakeup_coordinator = false;
 603                 CDEBUG(D_HSM, "coordinator resumes\n");
 604
 605                 if (kthread_should_stop()) {
 606                         CDEBUG(D_HSM, "Coordinator stops\n");
 607                         rc = 0;
 608                         break;
 609                 }
 610
 611                 /* if coordinator is suspended continue to wait */
 612                 if (cdt->cdt_state == CDT_DISABLE) {
 613                         CDEBUG(D_HSM, "disable state, coordinator sleeps\n");
 614                         continue;
 615                 }
 616
 617                 /* If no event, and no housekeeping to do, continue to
 618                  * wait. */
 619                 if (last_housekeeping + cdt->cdt_loop_period <=
 620                     ktime_get_real_seconds()) {
 621                         last_housekeeping = ktime_get_real_seconds();
 622                         hsd.housekeeping = true;
 623                 } else if (cdt->cdt_event) {
 624                         hsd.housekeeping = false;
 625                 } else {
 626                         continue;
 627                 }
 628
 629                 cdt->cdt_event = false;
 630
 631                 CDEBUG(D_HSM, "coordinator starts reading llog\n");
 632
 633                 if (hsd.max_requests != cdt->cdt_max_requests) {
 634                         /* cdt_max_requests has changed,
 635                          * we need to allocate a new buffer
 636                          */
 637                         struct hsm_scan_request *tmp = NULL;
 638                         int max_requests = cdt->cdt_max_requests;
 639                         OBD_ALLOC_LARGE(tmp, max_requests *
 640                                         sizeof(struct hsm_scan_request));
 641                         if (!tmp) {
 642                                 CERROR("Failed to resize request buffer, "
 643                                        "keeping it at %d\n",
 644                                        hsd.max_requests);
 645                                 cdt->cdt_max_requests = hsd.max_requests;
 646                         } else {
 647                                 OBD_FREE_LARGE(hsd.request, request_sz);
 648                                 hsd.max_requests = max_requests;
 649                                 request_sz = hsd.max_requests *
 650                                         sizeof(struct hsm_scan_request);
 651                                 hsd.request = tmp;
 652                         }
 653                 }
 654
 655                 hsd.request_cnt = 0;
 656
 657                 rc = cdt_llog_process(mti->mti_env, mdt, mdt_coordinator_cb,
 658                                       &hsd, 0, 0, WRITE);
 659                 if (rc < 0)
 660                         goto clean_cb_alloc;
 661
 662                 CDEBUG(D_HSM, "found %d requests to send\n", hsd.request_cnt);
 663
 664                 if (list_empty(&cdt->cdt_agents)) {
 665                         CDEBUG(D_HSM, "no agent available, "
 666                                       "coordinator sleeps\n");
 667                         goto clean_cb_alloc;
 668                 }
 669
 670                 /* Compute how many HAI we have in all the requests */
 671                 updates_cnt = 0;
 672                 for (i = 0; i < hsd.request_cnt; i++) {
 673                         const struct hsm_scan_request *request =
 674                                 &hsd.request[i];
 675
 676                         updates_cnt += request->hal->hal_count;
 677                 }
 678
 679                 /* Allocate a temporary array to store the cookies to
 680                  * update, and their status. */
 681                 updates_sz = updates_cnt * sizeof(*updates);
 682                 OBD_ALLOC(updates, updates_sz);
 683                 if (updates == NULL) {
 684                         CERROR("%s: Cannot allocate memory (%d o) "
 685                                "for %d updates\n",
 686                                mdt_obd_name(mdt), updates_sz, updates_cnt);
 687                         continue;
 688                 }
 689
 690                 /* here hsd contains a list of requests to be started */
 691                 for (i = 0; i < hsd.request_cnt; i++) {
 692                         struct hsm_scan_request *request = &hsd.request[i];
 693                         struct hsm_action_list  *hal = request->hal;
 694                         struct hsm_action_item  *hai;
 695                         int                      j;
 696
 697                         /* still room for work ? */
 698                         if (atomic_read(&cdt->cdt_request_count) >=
 699                             cdt->cdt_max_requests)
 700                                 break;
 701
 702                         rc = mdt_hsm_agent_send(mti, hal, 0);
 703                         /* if failure, we suppose it is temporary
 704                          * if the copy tool failed to do the request
 705                          * it has to use hsm_progress
 706                          */
 707
 708                         /* set up cookie vector to set records status
 709                          * after copy tools start or failed
 710                          */
 711                         hai = hai_first(hal);
 712                         for (j = 0; j < hal->hal_count; j++) {
 713                                 updates[update_idx].cookie = hai->hai_cookie;
 714                                 updates[update_idx].status =
 715                                         (rc ? ARS_WAITING : ARS_STARTED);
 716                                 hai = hai_next(hai);
 717                                 update_idx++;
 718                         }
 719                 }
 720
 721                 if (update_idx) {
 722                         rc = mdt_agent_record_update(mti->mti_env, mdt,
 723                                                      updates, update_idx);
 724                         if (rc)
 725                                 CERROR("%s: mdt_agent_record_update() failed, "
 726                                        "rc=%d, cannot update records "
 727                                        "for %d cookies\n",
 728                                        mdt_obd_name(mdt), rc, update_idx);
 729                 }
 730
 731                 OBD_FREE(updates, updates_sz);
 732
 733 clean_cb_alloc:
 734                 /* free hal allocated by callback */
 735                 for (i = 0; i < hsd.request_cnt; i++) {
 736                         struct hsm_scan_request *request = &hsd.request[i];
 737
 738                         OBD_FREE(request->hal, request->hal_sz);
 739                 }
 740         }
 741
 742         if (hsd.request)
 743                 OBD_FREE_LARGE(hsd.request, request_sz);
 744
 745         mdt_hsm_cdt_cleanup(mdt);
 746
 747         if (rc != 0)
 748                 CERROR("%s: coordinator thread exiting, process=%d, rc=%d\n",
 749                        mdt_obd_name(mdt), current_pid(), rc);
 750         else
 751                 CDEBUG(D_HSM, "%s: coordinator thread exiting, process=%d,"
 752                               " no error\n",
 753                        mdt_obd_name(mdt), current_pid());
 754
 755         RETURN(rc);
 756 }
 757
 758 int cdt_restore_handle_add(struct mdt_thread_info *mti, struct coordinator *cdt,
 759                            const struct lu_fid *fid,
 760                            const struct hsm_extent *he)
 761 {
 762         struct cdt_restore_handle *crh;
 763         struct mdt_object *obj;
 764         int rc;
 765         ENTRY;
 766
 767         OBD_SLAB_ALLOC_PTR(crh, mdt_hsm_cdt_kmem);
 768         if (crh == NULL)
 769                 RETURN(-ENOMEM);
 770
 771         crh->crh_fid = *fid;
 772         /* in V1 all file is restored
 773          * crh->extent.start = he->offset;
 774          * crh->extent.end = he->offset + he->length;
 775          */
 776         crh->crh_extent.start = 0;
 777         crh->crh_extent.end = he->length;
 778         /* get the layout lock */
 779         mdt_lock_reg_init(&crh->crh_lh, LCK_EX);
 780         obj = mdt_object_find_lock(mti, &crh->crh_fid, &crh->crh_lh,
 781                                    MDS_INODELOCK_LAYOUT);
 782         if (IS_ERR(obj))
 783                 GOTO(out_crh, rc = PTR_ERR(obj));
 784
 785         /* We do not keep a reference on the object during the restore
 786          * which can be very long. */
 787         mdt_object_put(mti->mti_env, obj);
 788
 789         mutex_lock(&cdt->cdt_restore_lock);
 790         if (unlikely(cdt->cdt_state == CDT_STOPPED ||
 791                      cdt->cdt_state == CDT_STOPPING)) {
 792                 mutex_unlock(&cdt->cdt_restore_lock);
 793                 GOTO(out_lh, rc = -EAGAIN);
 794         }
 795
 796         list_add_tail(&crh->crh_list, &cdt->cdt_restore_handle_list);
 797         mutex_unlock(&cdt->cdt_restore_lock);
 798
 799         RETURN(0);
 800 out_lh:
 801         mdt_object_unlock(mti, NULL, &crh->crh_lh, 1);
 802 out_crh:
 803         OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
 804
 805         return rc;
 806 }
 807
 808 /**
 809  * lookup a restore handle by FID
 810  * caller needs to hold cdt_restore_lock
 811  * \param cdt [IN] coordinator
 812  * \param fid [IN] FID
 813  * \retval cdt_restore_handle found
 814  * \retval NULL not found
 815  */
 816 struct cdt_restore_handle *cdt_restore_handle_find(struct coordinator *cdt,
 817                                                    const struct lu_fid *fid)
 818 {
 819         struct cdt_restore_handle *crh;
 820         ENTRY;
 821
 822         list_for_each_entry(crh, &cdt->cdt_restore_handle_list, crh_list) {
 823                 if (lu_fid_eq(&crh->crh_fid, fid))
 824                         RETURN(crh);
 825         }
 826
 827         RETURN(NULL);
 828 }
 829
 830 void cdt_restore_handle_del(struct mdt_thread_info *mti,
 831                             struct coordinator *cdt, const struct lu_fid *fid)
 832 {
 833         struct cdt_restore_handle *crh;
 834
 835         /* give back layout lock */
 836         mutex_lock(&cdt->cdt_restore_lock);
 837         crh = cdt_restore_handle_find(cdt, fid);
 838         if (crh != NULL)
 839                 list_del(&crh->crh_list);
 840         mutex_unlock(&cdt->cdt_restore_lock);
 841
 842         if (crh == NULL)
 843                 return;
 844
 845         /* XXX We pass a NULL object since the restore handle does not
 846          * keep a reference on the object being restored. */
 847         mdt_object_unlock(mti, NULL, &crh->crh_lh, 1);
 848         OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
 849 }
 850
 851 /**
 852  * data passed to llog_cat_process() callback
 853  * to scan requests and take actions
 854  */
 855 struct hsm_restore_data {
 856         struct mdt_thread_info  *hrd_mti;
 857 };
 858
 859 /**
 860  *  llog_cat_process() callback, used to:
 861  *  - find restore request and allocate the restore handle
 862  * \param env [IN] environment
 863  * \param llh [IN] llog handle
 864  * \param hdr [IN] llog record
 865  * \param data [IN/OUT] cb data = struct hsm_restore_data
 866  * \retval 0 success
 867  * \retval -ve failure
 868  */
 869 static int hsm_restore_cb(const struct lu_env *env,
 870                           struct llog_handle *llh,
 871                           struct llog_rec_hdr *hdr, void *data)
 872 {
 873         struct llog_agent_req_rec       *larr;
 874         struct hsm_restore_data         *hrd;
 875         struct hsm_action_item          *hai;
 876         struct mdt_thread_info          *mti;
 877         struct coordinator              *cdt;
 878         int rc;
 879         ENTRY;
 880
 881         hrd = data;
 882         mti = hrd->hrd_mti;
 883         cdt = &mti->mti_mdt->mdt_coordinator;
 884
 885         larr = (struct llog_agent_req_rec *)hdr;
 886         hai = &larr->arr_hai;
 887         if (hai->hai_cookie > cdt->cdt_last_cookie)
 888                 /* update the cookie to avoid collision */
 889                 cdt->cdt_last_cookie = hai->hai_cookie + 1;
 890
 891         if (hai->hai_action != HSMA_RESTORE ||
 892             agent_req_in_final_state(larr->arr_status))
 893                 RETURN(0);
 894
 895         /* restore request not in a final state */
 896
 897         /* force replay of restore requests left in started state from previous
 898          * CDT context, to be canceled later if finally found to be incompatible
 899          * when being re-started */
 900         if (larr->arr_status == ARS_STARTED) {
 901                 larr->arr_status = ARS_WAITING;
 902                 larr->arr_req_change = ktime_get_real_seconds();
 903                 rc = llog_write(env, llh, hdr, hdr->lrh_index);
 904                 if (rc != 0)
 905                         GOTO(out, rc);
 906         }
 907
 908         rc = cdt_restore_handle_add(mti, cdt, &hai->hai_fid, &hai->hai_extent);
 909 out:
 910         RETURN(rc);
 911 }
 912
 913 /**
 914  * restore coordinator state at startup
 915  * the goal is to take a layout lock for each registered restore request
 916  * \param mti [IN] context
 917  */
 918 static int mdt_hsm_pending_restore(struct mdt_thread_info *mti)
 919 {
 920         struct hsm_restore_data  hrd;
 921         int                      rc;
 922         ENTRY;
 923
 924         hrd.hrd_mti = mti;
 925
 926         rc = cdt_llog_process(mti->mti_env, mti->mti_mdt, hsm_restore_cb, &hrd,
 927                               0, 0, WRITE);
 928
 929         RETURN(rc);
 930 }
 931
 932 static int hsm_init_ucred(struct lu_ucred *uc)
 933 {
 934         ENTRY;
 935
 936         uc->uc_valid = UCRED_OLD;
 937         uc->uc_o_uid = 0;
 938         uc->uc_o_gid = 0;
 939         uc->uc_o_fsuid = 0;
 940         uc->uc_o_fsgid = 0;
 941         uc->uc_uid = 0;
 942         uc->uc_gid = 0;
 943         uc->uc_fsuid = 0;
 944         uc->uc_fsgid = 0;
 945         uc->uc_suppgids[0] = -1;
 946         uc->uc_suppgids[1] = -1;
 947         uc->uc_cap = CFS_CAP_FS_MASK;
 948         uc->uc_umask = 0777;
 949         uc->uc_ginfo = NULL;
 950         uc->uc_identity = NULL;
 951         /* always record internal HSM activity if also enabled globally */
 952         uc->uc_enable_audit = 1;
 953
 954         RETURN(0);
 955 }
 956
 957 /**
 958  * initialize coordinator struct
 959  * \param mdt [IN] device
 960  * \retval 0 success
 961  * \retval -ve failure
 962  */
 963 int mdt_hsm_cdt_init(struct mdt_device *mdt)
 964 {
 965         struct coordinator      *cdt = &mdt->mdt_coordinator;
 966         struct mdt_thread_info  *cdt_mti = NULL;
 967         int                      rc;
 968         ENTRY;
 969
 970         init_waitqueue_head(&cdt->cdt_waitq);
 971         init_rwsem(&cdt->cdt_llog_lock);
 972         init_rwsem(&cdt->cdt_agent_lock);
 973         init_rwsem(&cdt->cdt_request_lock);
 974         mutex_init(&cdt->cdt_restore_lock);
 975         mutex_init(&cdt->cdt_state_lock);
 976         set_cdt_state(cdt, CDT_STOPPED);
 977
 978         INIT_LIST_HEAD(&cdt->cdt_request_list);
 979         INIT_LIST_HEAD(&cdt->cdt_agents);
 980         INIT_LIST_HEAD(&cdt->cdt_restore_handle_list);
 981
 982         cdt->cdt_request_cookie_hash = cfs_hash_create("REQUEST_COOKIE_HASH",
 983                                                        CFS_HASH_BITS_MIN,
 984                                                        CFS_HASH_BITS_MAX,
 985                                                        CFS_HASH_BKT_BITS,
 986                                                        0 /* extra bytes */,
 987                                                        CFS_HASH_MIN_THETA,
 988                                                        CFS_HASH_MAX_THETA,
 989                                                 &cdt_request_cookie_hash_ops,
 990                                                        CFS_HASH_DEFAULT);
 991         if (cdt->cdt_request_cookie_hash == NULL)
 992                 RETURN(-ENOMEM);
 993
 994         cdt->cdt_agent_record_hash = cfs_hash_create("AGENT_RECORD_HASH",
 995                                                      CFS_HASH_BITS_MIN,
 996                                                      CFS_HASH_BITS_MAX,
 997                                                      CFS_HASH_BKT_BITS,
 998                                                      0 /* extra bytes */,
 999                                                      CFS_HASH_MIN_THETA,
1000                                                      CFS_HASH_MAX_THETA,
1001                                                      &cdt_agent_record_hash_ops,
1002                                                      CFS_HASH_DEFAULT);
1003         if (cdt->cdt_agent_record_hash == NULL)
1004                 GOTO(out_request_cookie_hash, rc = -ENOMEM);
1005
1006         rc = lu_env_init(&cdt->cdt_env, LCT_MD_THREAD);
1007         if (rc < 0)
1008                 GOTO(out_agent_record_hash, rc);
1009
1010         /* for mdt_ucred(), lu_ucred stored in lu_ucred_key */
1011         rc = lu_context_init(&cdt->cdt_session, LCT_SERVER_SESSION);
1012         if (rc < 0)
1013                 GOTO(out_env, rc);
1014
1015         lu_context_enter(&cdt->cdt_session);
1016         cdt->cdt_env.le_ses = &cdt->cdt_session;
1017
1018         cdt_mti = lu_context_key_get(&cdt->cdt_env.le_ctx, &mdt_thread_key);
1019         LASSERT(cdt_mti != NULL);
1020
1021         cdt_mti->mti_env = &cdt->cdt_env;
1022         cdt_mti->mti_mdt = mdt;
1023
1024         hsm_init_ucred(mdt_ucred(cdt_mti));
1025
1026         /* default values for /proc tunnables
1027          * can be override by MGS conf */
1028         cdt->cdt_default_archive_id = 1;
1029         cdt->cdt_grace_delay = 60;
1030         cdt->cdt_loop_period = 10;
1031         cdt->cdt_max_requests = 3;
1032         cdt->cdt_policy = CDT_DEFAULT_POLICY;
1033         cdt->cdt_active_req_timeout = 3600;
1034
1035         /* Initialize cdt_compound_id here to allow its usage for
1036          * delayed requests from RAoLU policy */
1037         atomic_set(&cdt->cdt_compound_id, ktime_get_real_seconds());
1038
1039         /* by default do not remove archives on last unlink */
1040         cdt->cdt_remove_archive_on_last_unlink = false;
1041
1042         RETURN(0);
1043
1044 out_env:
1045         lu_env_fini(&cdt->cdt_env);
1046 out_agent_record_hash:
1047         cfs_hash_putref(cdt->cdt_agent_record_hash);
1048         cdt->cdt_agent_record_hash = NULL;
1049 out_request_cookie_hash:
1050         cfs_hash_putref(cdt->cdt_request_cookie_hash);
1051         cdt->cdt_request_cookie_hash = NULL;
1052
1053         return rc;
1054 }
1055
1056 /**
1057  * free a coordinator thread
1058  * \param mdt [IN] device
1059  */
1060 int  mdt_hsm_cdt_fini(struct mdt_device *mdt)
1061 {
1062         struct coordinator *cdt = &mdt->mdt_coordinator;
1063         ENTRY;
1064
1065         lu_context_exit(cdt->cdt_env.le_ses);
1066         lu_context_fini(cdt->cdt_env.le_ses);
1067
1068         lu_env_fini(&cdt->cdt_env);
1069
1070         cfs_hash_putref(cdt->cdt_agent_record_hash);
1071         cdt->cdt_agent_record_hash = NULL;
1072
1073         cfs_hash_putref(cdt->cdt_request_cookie_hash);
1074         cdt->cdt_request_cookie_hash = NULL;
1075
1076         RETURN(0);
1077 }
1078
1079 /**
1080  * start a coordinator thread
1081  * \param mdt [IN] device
1082  * \retval 0 success
1083  * \retval -ve failure
1084  */
1085 static int mdt_hsm_cdt_start(struct mdt_device *mdt)
1086 {
1087         struct coordinator      *cdt = &mdt->mdt_coordinator;
1088         int                      rc;
1089         void                    *ptr;
1090         struct task_struct      *task;
1091         int                      request_sz;
1092         struct hsm_thread_data   thread_data;
1093         ENTRY;
1094
1095         /* functions defined but not yet used
1096          * this avoid compilation warning
1097          */
1098         ptr = dump_requests;
1099
1100         rc = set_cdt_state(cdt, CDT_INIT);
1101         if (rc) {
1102                 CERROR("%s: Coordinator already started or stopping\n",
1103                        mdt_obd_name(mdt));
1104                 RETURN(-EALREADY);
1105         }
1106
1107         CLASSERT(1 << (CDT_POLICY_SHIFT_COUNT - 1) == CDT_POLICY_LAST);
1108         cdt->cdt_policy = CDT_DEFAULT_POLICY;
1109
1110         /* just need to be larger than previous one */
1111         /* cdt_last_cookie is protected by cdt_llog_lock */
1112         cdt->cdt_last_cookie = ktime_get_real_seconds();
1113         atomic_set(&cdt->cdt_request_count, 0);
1114         atomic_set(&cdt->cdt_archive_count, 0);
1115         atomic_set(&cdt->cdt_restore_count, 0);
1116         atomic_set(&cdt->cdt_remove_count, 0);
1117         cdt->cdt_user_request_mask = (1UL << HSMA_RESTORE);
1118         cdt->cdt_group_request_mask = (1UL << HSMA_RESTORE);
1119         cdt->cdt_other_request_mask = (1UL << HSMA_RESTORE);
1120
1121         /* to avoid deadlock when start is made through /proc
1122          * /proc entries are created by the coordinator thread */
1123
1124         /* set up list of started restore requests */
1125         thread_data.cdt_mti =
1126                 lu_context_key_get(&cdt->cdt_env.le_ctx, &mdt_thread_key);
1127         rc = mdt_hsm_pending_restore(thread_data.cdt_mti);
1128         if (rc)
1129                 CERROR("%s: cannot take the layout locks needed"
1130                        " for registered restore: %d\n",
1131                        mdt_obd_name(mdt), rc);
1132
1133         if (mdt->mdt_bottom->dd_rdonly)
1134                 RETURN(0);
1135
1136         /* Allocate the initial hsd.request[] vector*/
1137         request_sz = cdt->cdt_max_requests * sizeof(struct hsm_scan_request);
1138         OBD_ALLOC_LARGE(thread_data.request, request_sz);
1139         if (!thread_data.request) {
1140                 set_cdt_state(cdt, CDT_STOPPED);
1141                 RETURN(-ENOMEM);
1142         }
1143
1144         task = kthread_run(mdt_coordinator, &thread_data, "hsm_cdtr");
1145         if (IS_ERR(task)) {
1146                 rc = PTR_ERR(task);
1147                 set_cdt_state(cdt, CDT_STOPPED);
1148                 OBD_FREE(thread_data.request, request_sz);
1149                 CERROR("%s: error starting coordinator thread: %d\n",
1150                        mdt_obd_name(mdt), rc);
1151         } else {
1152                 cdt->cdt_task = task;
1153                 wait_event(cdt->cdt_waitq,
1154                            cdt->cdt_state != CDT_INIT);
1155                 CDEBUG(D_HSM, "%s: coordinator thread started\n",
1156                        mdt_obd_name(mdt));
1157                 rc = 0;
1158         }
1159
1160         RETURN(rc);
1161 }
1162
1163 /**
1164  * stop a coordinator thread
1165  * \param mdt [IN] device
1166  */
1167 int mdt_hsm_cdt_stop(struct mdt_device *mdt)
1168 {
1169         struct coordinator *cdt = &mdt->mdt_coordinator;
1170         int rc;
1171
1172         ENTRY;
1173         /* stop coordinator thread */
1174         rc = set_cdt_state(cdt, CDT_STOPPING);
1175         if (rc == 0) {
1176                 kthread_stop(cdt->cdt_task);
1177                 cdt->cdt_task = NULL;
1178                 set_cdt_state(cdt, CDT_STOPPED);
1179         }
1180
1181         RETURN(rc);
1182 }
1183
1184 static int mdt_hsm_set_exists(struct mdt_thread_info *mti,
1185                               const struct lu_fid *fid,
1186                               u32 archive_id)
1187 {
1188         struct mdt_object *obj;
1189         struct md_hsm mh;
1190         int rc;
1191
1192         obj = mdt_hsm_get_md_hsm(mti, fid, &mh);
1193         if (IS_ERR(obj))
1194                 GOTO(out, rc = PTR_ERR(obj));
1195
1196         if (mh.mh_flags & HS_EXISTS &&
1197             mh.mh_arch_id == archive_id)
1198                 GOTO(out_obj, rc = 0);
1199
1200         mh.mh_flags |= HS_EXISTS;
1201         mh.mh_arch_id = archive_id;
1202         rc = mdt_hsm_attr_set(mti, obj, &mh);
1203
1204 out_obj:
1205         mdt_object_put(mti->mti_env, obj);
1206 out:
1207         return rc;
1208 }
1209
1210 /**
1211  * register all requests from an hal in the memory list
1212  * \param mti [IN] context
1213  * \param hal [IN] request
1214  * \param uuid [OUT] in case of CANCEL, the uuid of the agent
1215  *  which is running the CT
1216  * \retval 0 success
1217  * \retval -ve failure
1218  */
1219 int mdt_hsm_add_hal(struct mdt_thread_info *mti,
1220                     struct hsm_action_list *hal, struct obd_uuid *uuid)
1221 {
1222         struct mdt_device       *mdt = mti->mti_mdt;
1223         struct coordinator      *cdt = &mdt->mdt_coordinator;
1224         struct hsm_action_item  *hai;
1225         int                      rc = 0, i;
1226         ENTRY;
1227
1228         /* register request in memory list */
1229         hai = hai_first(hal);
1230         for (i = 0; i < hal->hal_count; i++, hai = hai_next(hai)) {
1231                 struct cdt_agent_req *car;
1232
1233                 /* in case of a cancel request, we first mark the ondisk
1234                  * record of the request we want to stop as canceled
1235                  * this does not change the cancel record
1236                  * it will be done when updating the request status
1237                  */
1238                 if (hai->hai_action == HSMA_CANCEL) {
1239                         struct hsm_record_update update = {
1240                                 .cookie = hai->hai_cookie,
1241                                 .status = ARS_CANCELED,
1242                         };
1243
1244                         rc = mdt_agent_record_update(mti->mti_env, mti->mti_mdt,
1245                                                      &update, 1);
1246                         if (rc) {
1247                                 CERROR("%s: mdt_agent_record_update() failed, "
1248                                        "rc=%d, cannot update status to %s "
1249                                        "for cookie %#llx\n",
1250                                        mdt_obd_name(mdt), rc,
1251                                        agent_req_status2name(ARS_CANCELED),
1252                                        hai->hai_cookie);
1253                                 GOTO(out, rc);
1254                         }
1255
1256                         /* find the running request to set it canceled */
1257                         car = mdt_cdt_find_request(cdt, hai->hai_cookie);
1258                         if (car != NULL) {
1259                                 car->car_canceled = 1;
1260                                 /* uuid has to be changed to the one running the
1261                                 * request to cancel */
1262                                 *uuid = car->car_uuid;
1263                                 mdt_cdt_put_request(car);
1264                         }
1265                         /* no need to memorize cancel request
1266                          * this also avoid a deadlock when we receive
1267                          * a purge all requests command
1268                          */
1269                         continue;
1270                 }
1271
1272                 if (hai->hai_action == HSMA_ARCHIVE) {
1273                         rc = mdt_hsm_set_exists(mti, &hai->hai_fid,
1274                                                 hal->hal_archive_id);
1275                         if (rc == -ENOENT)
1276                                 continue;
1277                         else if (rc < 0)
1278                                 GOTO(out, rc);
1279                 }
1280
1281                 car = mdt_cdt_alloc_request(hal->hal_compound_id,
1282                                             hal->hal_archive_id, hal->hal_flags,
1283                                             uuid, hai);
1284                 if (IS_ERR(car))
1285                         GOTO(out, rc = PTR_ERR(car));
1286
1287                 rc = mdt_cdt_add_request(cdt, car);
1288                 if (rc != 0)
1289                         mdt_cdt_free_request(car);
1290         }
1291 out:
1292         RETURN(rc);
1293 }
1294
1295 /**
1296  * swap layouts between 2 fids
1297  * \param mti [IN] context
1298  * \param obj [IN]
1299  * \param dfid [IN]
1300  * \param mh_common [IN] MD HSM
1301  */
1302 static int hsm_swap_layouts(struct mdt_thread_info *mti,
1303                             struct mdt_object *obj, const struct lu_fid *dfid,
1304                             struct md_hsm *mh_common)
1305 {
1306         struct mdt_object       *dobj;
1307         struct mdt_lock_handle  *dlh;
1308         int                      rc;
1309         ENTRY;
1310
1311         if (!mdt_object_exists(obj))
1312                 GOTO(out, rc = -ENOENT);
1313
1314         /* we already have layout lock on obj so take only
1315          * on dfid */
1316         dlh = &mti->mti_lh[MDT_LH_OLD];
1317         mdt_lock_reg_init(dlh, LCK_EX);
1318         dobj = mdt_object_find_lock(mti, dfid, dlh, MDS_INODELOCK_LAYOUT);
1319         if (IS_ERR(dobj))
1320                 GOTO(out, rc = PTR_ERR(dobj));
1321
1322         /* if copy tool closes the volatile before sending the final
1323          * progress through llapi_hsm_copy_end(), all the objects
1324          * are removed and mdd_swap_layout LBUG */
1325         if (!mdt_object_exists(dobj)) {
1326                 CERROR("%s: Copytool has closed volatile file "DFID"\n",
1327                        mdt_obd_name(mti->mti_mdt), PFID(dfid));
1328                 GOTO(out_dobj, rc = -ENOENT);
1329         }
1330         /* Since we only handle restores here, unconditionally use
1331          * SWAP_LAYOUTS_MDS_HSM flag to ensure original layout will
1332          * be preserved in case of failure during swap_layout and not
1333          * leave a file in an intermediate but incoherent state.
1334          * But need to setup HSM xattr of data FID before, reuse
1335          * mti and mh presets for FID in hsm_cdt_request_completed(),
1336          * only need to clear RELEASED and DIRTY.
1337          */
1338         mh_common->mh_flags &= ~(HS_RELEASED | HS_DIRTY);
1339         rc = mdt_hsm_attr_set(mti, dobj, mh_common);
1340         if (rc == 0)
1341                 rc = mo_swap_layouts(mti->mti_env,
1342                                      mdt_object_child(obj),
1343                                      mdt_object_child(dobj),
1344                                      SWAP_LAYOUTS_MDS_HSM);
1345
1346 out_dobj:
1347         mdt_object_unlock_put(mti, dobj, dlh, 1);
1348 out:
1349         RETURN(rc);
1350 }
1351
1352 /**
1353  * update status of a completed request
1354  * \param mti [IN] context
1355  * \param pgs [IN] progress of the copy tool
1356  * \retval 0 success
1357  * \retval -ve failure
1358  */
1359 static int hsm_cdt_request_completed(struct mdt_thread_info *mti,
1360                                      struct hsm_progress_kernel *pgs,
1361                                      const struct cdt_agent_req *car,
1362                                      enum agent_req_status *status)
1363 {
1364         const struct lu_env     *env = mti->mti_env;
1365         struct mdt_device       *mdt = mti->mti_mdt;
1366         struct coordinator      *cdt = &mdt->mdt_coordinator;
1367         struct mdt_object       *obj = NULL;
1368         int                      cl_flags = 0, rc = 0;
1369         struct md_hsm            mh;
1370         bool                     is_mh_changed;
1371         bool                     need_changelog = true;
1372         ENTRY;
1373
1374         /* default is to retry */
1375         *status = ARS_WAITING;
1376
1377         /* find object by FID, mdt_hsm_get_md_hsm() returns obj or err
1378          * if error/removed continue anyway to get correct reporting done */
1379         obj = mdt_hsm_get_md_hsm(mti, &car->car_hai->hai_fid, &mh);
1380         /* we will update MD HSM only if needed */
1381         is_mh_changed = false;
1382
1383         /* no need to change mh->mh_arch_id
1384          * mdt_hsm_get_md_hsm() got it from disk and it is still valid
1385          */
1386         if (pgs->hpk_errval != 0) {
1387                 switch (pgs->hpk_errval) {
1388                 case ENOSYS:
1389                         /* the copy tool does not support cancel
1390                          * so the cancel request is failed
1391                          * As we cannot distinguish a cancel progress
1392                          * from another action progress (they have the
1393                          * same cookie), we suppose here the CT returns
1394                          * ENOSYS only if does not support cancel
1395                          */
1396                         /* this can also happen when cdt calls it to
1397                          * for a timed out request */
1398                         *status = ARS_FAILED;
1399                         /* to have a cancel event in changelog */
1400                         pgs->hpk_errval = ECANCELED;
1401                         break;
1402                 case ECANCELED:
1403                         /* the request record has already been set to
1404                          * ARS_CANCELED, this set the cancel request
1405                          * to ARS_SUCCEED */
1406                         *status = ARS_SUCCEED;
1407                         break;
1408                 default:
1409                         /* retry only if current policy or requested, and
1410                          * object is not on error/removed */
1411                         *status = (cdt->cdt_policy & CDT_NORETRY_ACTION ||
1412                                    !(pgs->hpk_flags & HP_FLAG_RETRY) ||
1413                                    IS_ERR(obj)) ? ARS_FAILED : ARS_WAITING;
1414                         break;
1415                 }
1416
1417                 if (pgs->hpk_errval > CLF_HSM_MAXERROR) {
1418                         CERROR("%s: Request %#llx on "DFID
1419                                " failed, error code %d too large\n",
1420                                mdt_obd_name(mdt),
1421                                pgs->hpk_cookie, PFID(&pgs->hpk_fid),
1422                                pgs->hpk_errval);
1423                         hsm_set_cl_error(&cl_flags,
1424                                          CLF_HSM_ERROVERFLOW);
1425                         rc = -EINVAL;
1426                 } else {
1427                         hsm_set_cl_error(&cl_flags, pgs->hpk_errval);
1428                 }
1429
1430                 switch (car->car_hai->hai_action) {
1431                 case HSMA_ARCHIVE:
1432                         hsm_set_cl_event(&cl_flags, HE_ARCHIVE);
1433                         break;
1434                 case HSMA_RESTORE:
1435                         hsm_set_cl_event(&cl_flags, HE_RESTORE);
1436                         break;
1437                 case HSMA_REMOVE:
1438                         hsm_set_cl_event(&cl_flags, HE_REMOVE);
1439                         break;
1440                 case HSMA_CANCEL:
1441                         hsm_set_cl_event(&cl_flags, HE_CANCEL);
1442                         CERROR("%s: Failed request %#llx on "DFID
1443                                " cannot be a CANCEL\n",
1444                                mdt_obd_name(mdt),
1445                                pgs->hpk_cookie,
1446                                PFID(&pgs->hpk_fid));
1447                         break;
1448                 default:
1449                         CERROR("%s: Failed request %#llx on "DFID
1450                                " %d is an unknown action\n",
1451                                mdt_obd_name(mdt),
1452                                pgs->hpk_cookie, PFID(&pgs->hpk_fid),
1453                                car->car_hai->hai_action);
1454                         rc = -EINVAL;
1455                         break;
1456                 }
1457         } else {
1458                 *status = ARS_SUCCEED;
1459                 switch (car->car_hai->hai_action) {
1460                 case HSMA_ARCHIVE:
1461                         hsm_set_cl_event(&cl_flags, HE_ARCHIVE);
1462                         /* set ARCHIVE keep EXIST and clear LOST and
1463                          * DIRTY */
1464                         mh.mh_arch_ver = pgs->hpk_data_version;
1465                         mh.mh_flags |= HS_ARCHIVED;
1466                         mh.mh_flags &= ~(HS_LOST|HS_DIRTY);
1467                         is_mh_changed = true;
1468                         break;
1469                 case HSMA_RESTORE:
1470                         hsm_set_cl_event(&cl_flags, HE_RESTORE);
1471
1472                         /* do not clear RELEASED and DIRTY here
1473                          * this will occur in hsm_swap_layouts()
1474                          */
1475
1476                         /* Restoring has changed the file version on
1477                          * disk. */
1478                         mh.mh_arch_ver = pgs->hpk_data_version;
1479                         is_mh_changed = true;
1480                         break;
1481                 case HSMA_REMOVE:
1482                         hsm_set_cl_event(&cl_flags, HE_REMOVE);
1483                         /* clear ARCHIVED EXISTS and LOST */
1484                         mh.mh_flags &= ~(HS_ARCHIVED | HS_EXISTS | HS_LOST);
1485                         is_mh_changed = true;
1486                         break;
1487                 case HSMA_CANCEL:
1488                         hsm_set_cl_event(&cl_flags, HE_CANCEL);
1489                         CERROR("%s: Successful request %#llx on "DFID" cannot be a CANCEL\n",
1490                                mdt_obd_name(mdt),
1491                                pgs->hpk_cookie,
1492                                PFID(&pgs->hpk_fid));
1493                         break;
1494                 default:
1495                         CERROR("%s: Successful request %#llx on "DFID" %d is an unknown action\n",
1496                                mdt_obd_name(mdt),
1497                                pgs->hpk_cookie, PFID(&pgs->hpk_fid),
1498                                car->car_hai->hai_action);
1499                         rc = -EINVAL;
1500                         break;
1501                 }
1502         }
1503
1504         /* rc != 0 means error when analysing action, it may come from
1505          * a crasy CT no need to manage DIRTY
1506          * and if mdt_hsm_get_md_hsm() has returned an error, mh has not been
1507          * filled
1508          */
1509         if (rc == 0 && !IS_ERR(obj))
1510                 hsm_set_cl_flags(&cl_flags,
1511                                  mh.mh_flags & HS_DIRTY ? CLF_HSM_DIRTY : 0);
1512
1513         /* unlock is done later, after layout lock management */
1514         if (is_mh_changed && !IS_ERR(obj))
1515                 rc = mdt_hsm_attr_set(mti, obj, &mh);
1516
1517         /* we give back layout lock only if restore was successful or
1518          * if no retry will be attempted and if object is still alive,
1519          * in other cases we just unlock the object */
1520         if (car->car_hai->hai_action == HSMA_RESTORE) {
1521                 /* restore in data FID done, we swap the layouts
1522                  * only if restore is successful */
1523                 if (pgs->hpk_errval == 0 && !IS_ERR(obj)) {
1524                         rc = hsm_swap_layouts(mti, obj, &car->car_hai->hai_dfid,
1525                                               &mh);
1526                         if (rc) {
1527                                 if (cdt->cdt_policy & CDT_NORETRY_ACTION)
1528                                         *status = ARS_FAILED;
1529                                 pgs->hpk_errval = -rc;
1530                         }
1531                 }
1532                 /* we have to retry, so keep layout lock */
1533                 if (*status == ARS_WAITING)
1534                         GOTO(out, rc);
1535
1536                 /* restore special case, need to create ChangeLog record
1537                  * before to give back layout lock to avoid concurrent
1538                  * file updater to post out of order ChangeLog */
1539                 mo_changelog(env, CL_HSM, cl_flags, mdt->mdt_child,
1540                              &car->car_hai->hai_fid);
1541                 need_changelog = false;
1542
1543                 cdt_restore_handle_del(mti, cdt, &car->car_hai->hai_fid);
1544         }
1545
1546         GOTO(out, rc);
1547
1548 out:
1549         /* always add a ChangeLog record */
1550         if (need_changelog)
1551                 mo_changelog(env, CL_HSM, cl_flags, mdt->mdt_child,
1552                              &car->car_hai->hai_fid);
1553
1554         if (!IS_ERR(obj))
1555                 mdt_object_put(mti->mti_env, obj);
1556
1557         RETURN(rc);
1558 }
1559
1560 /**
1561  * update status of a request
1562  * \param mti [IN] context
1563  * \param pgs [IN] progress of the copy tool
1564  * \retval 0 success
1565  * \retval -ve failure
1566  */
1567 int mdt_hsm_update_request_state(struct mdt_thread_info *mti,
1568                                  struct hsm_progress_kernel *pgs)
1569 {
1570         struct mdt_device       *mdt = mti->mti_mdt;
1571         struct coordinator      *cdt = &mdt->mdt_coordinator;
1572         struct cdt_agent_req    *car;
1573         int                      rc = 0;
1574         ENTRY;
1575
1576         /* no coordinator started, so we cannot serve requests */
1577         if (cdt->cdt_state == CDT_STOPPED)
1578                 RETURN(-EAGAIN);
1579
1580         /* first do sanity checks */
1581         car = mdt_cdt_update_request(cdt, pgs);
1582         if (IS_ERR(car)) {
1583                 CERROR("%s: Cannot find running request for cookie %#llx"
1584                        " on fid="DFID"\n",
1585                        mdt_obd_name(mdt),
1586                        pgs->hpk_cookie, PFID(&pgs->hpk_fid));
1587
1588                 RETURN(PTR_ERR(car));
1589         }
1590
1591         CDEBUG(D_HSM, "Progress received for fid="DFID" cookie=%#llx"
1592                       " action=%s flags=%d err=%d fid="DFID" dfid="DFID"\n",
1593                       PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1594                       hsm_copytool_action2name(car->car_hai->hai_action),
1595                       pgs->hpk_flags, pgs->hpk_errval,
1596                       PFID(&car->car_hai->hai_fid),
1597                       PFID(&car->car_hai->hai_dfid));
1598
1599         /* progress is done on FID or data FID depending of the action and
1600          * of the copy progress */
1601         /* for restore progress is used to send back the data FID to cdt */
1602         if (car->car_hai->hai_action == HSMA_RESTORE &&
1603             lu_fid_eq(&car->car_hai->hai_fid, &car->car_hai->hai_dfid))
1604                 car->car_hai->hai_dfid = pgs->hpk_fid;
1605
1606         if ((car->car_hai->hai_action == HSMA_RESTORE ||
1607              car->car_hai->hai_action == HSMA_ARCHIVE) &&
1608             (!lu_fid_eq(&pgs->hpk_fid, &car->car_hai->hai_dfid) &&
1609              !lu_fid_eq(&pgs->hpk_fid, &car->car_hai->hai_fid))) {
1610                 CERROR("%s: Progress on "DFID" for cookie %#llx"
1611                        " does not match request FID "DFID" nor data FID "
1612                        DFID"\n",
1613                        mdt_obd_name(mdt),
1614                        PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1615                        PFID(&car->car_hai->hai_fid),
1616                        PFID(&car->car_hai->hai_dfid));
1617                 GOTO(out, rc = -EINVAL);
1618         }
1619
1620         if (pgs->hpk_errval != 0 && !(pgs->hpk_flags & HP_FLAG_COMPLETED)) {
1621                 CERROR("%s: Progress on "DFID" for cookie %#llx action=%s"
1622                        " is not coherent (err=%d and not completed"
1623                        " (flags=%d))\n",
1624                        mdt_obd_name(mdt),
1625                        PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1626                        hsm_copytool_action2name(car->car_hai->hai_action),
1627                        pgs->hpk_errval, pgs->hpk_flags);
1628                 GOTO(out, rc = -EINVAL);
1629         }
1630
1631         /* now progress is valid */
1632
1633         /* we use a root like ucred */
1634         hsm_init_ucred(mdt_ucred(mti));
1635
1636         if (pgs->hpk_flags & HP_FLAG_COMPLETED) {
1637                 enum agent_req_status status;
1638                 struct hsm_record_update update;
1639                 int rc1;
1640
1641                 rc = hsm_cdt_request_completed(mti, pgs, car, &status);
1642
1643                 CDEBUG(D_HSM, "updating record: fid="DFID" cookie=%#llx action=%s "
1644                               "status=%s\n",
1645                        PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1646                        hsm_copytool_action2name(car->car_hai->hai_action),
1647                        agent_req_status2name(status));
1648
1649                 /* update record first (LU-9075) */
1650                 update.cookie = pgs->hpk_cookie;
1651                 update.status = status;
1652
1653                 rc1 = mdt_agent_record_update(mti->mti_env, mdt,
1654                                               &update, 1);
1655                 if (rc1)
1656                         CERROR("%s: mdt_agent_record_update() failed,"
1657                                " rc=%d, cannot update status to %s"
1658                                " for cookie %#llx\n",
1659                                mdt_obd_name(mdt), rc1,
1660                                agent_req_status2name(status),
1661                                pgs->hpk_cookie);
1662                 rc = (rc != 0 ? rc : rc1);
1663
1664                 /* then remove request from memory list (LU-9075) */
1665                 mdt_cdt_remove_request(cdt, pgs->hpk_cookie);
1666
1667                 /* ct has completed a request, so a slot is available,
1668                  * signal the coordinator to find new work */
1669                 mdt_hsm_cdt_event(cdt);
1670         } else {
1671                 /* if copytool send a progress on a canceled request
1672                  * we inform copytool it should stop
1673                  */
1674                 if (car->car_canceled == 1)
1675                         rc = -ECANCELED;
1676         }
1677         GOTO(out, rc);
1678
1679 out:
1680         /* remove ref got from mdt_cdt_update_request() */
1681         mdt_cdt_put_request(car);
1682
1683         return rc;
1684 }
1685
1686
1687 /**
1688  * data passed to llog_cat_process() callback
1689  * to cancel requests
1690  */
1691 struct hsm_cancel_all_data {
1692         struct mdt_device       *mdt;
1693 };
1694
1695 /**
1696  *  llog_cat_process() callback, used to:
1697  *  - purge all requests
1698  * \param env [IN] environment
1699  * \param llh [IN] llog handle
1700  * \param hdr [IN] llog record
1701  * \param data [IN] cb data = struct hsm_cancel_all_data
1702  * \retval 0 success
1703  * \retval -ve failure
1704  */
1705 static int mdt_cancel_all_cb(const struct lu_env *env,
1706                              struct llog_handle *llh,
1707                              struct llog_rec_hdr *hdr, void *data)
1708 {
1709         struct llog_agent_req_rec       *larr;
1710         struct hsm_cancel_all_data      *hcad;
1711         int                              rc = 0;
1712         ENTRY;
1713
1714         larr = (struct llog_agent_req_rec *)hdr;
1715         hcad = data;
1716         if (larr->arr_status == ARS_WAITING ||
1717             larr->arr_status == ARS_STARTED) {
1718                 larr->arr_status = ARS_CANCELED;
1719                 larr->arr_req_change = ktime_get_real_seconds();
1720                 rc = llog_write(env, llh, hdr, hdr->lrh_index);
1721         }
1722
1723         RETURN(rc);
1724 }
1725
1726 /**
1727  * cancel all actions
1728  * \param obd [IN] MDT device
1729  */
1730 static int hsm_cancel_all_actions(struct mdt_device *mdt)
1731 {
1732         struct lu_env                    env;
1733         struct lu_context                session;
1734         struct mdt_thread_info          *mti;
1735         struct coordinator              *cdt = &mdt->mdt_coordinator;
1736         struct cdt_agent_req            *car;
1737         struct hsm_action_list          *hal = NULL;
1738         struct hsm_action_item          *hai;
1739         struct hsm_cancel_all_data       hcad;
1740         int                              hal_sz = 0, hal_len, rc;
1741         enum cdt_states                  old_state;
1742         ENTRY;
1743
1744         rc = lu_env_init(&env, LCT_MD_THREAD);
1745         if (rc < 0)
1746                 RETURN(rc);
1747
1748         /* for mdt_ucred(), lu_ucred stored in lu_ucred_key */
1749         rc = lu_context_init(&session, LCT_SERVER_SESSION);
1750         if (rc < 0)
1751                 GOTO(out_env, rc);
1752
1753         lu_context_enter(&session);
1754         env.le_ses = &session;
1755
1756         mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
1757         LASSERT(mti != NULL);
1758
1759         mti->mti_env = &env;
1760         mti->mti_mdt = mdt;
1761
1762         hsm_init_ucred(mdt_ucred(mti));
1763
1764         mutex_lock(&cdt->cdt_state_lock);
1765         old_state = cdt->cdt_state;
1766
1767         /* disable coordinator */
1768         rc = set_cdt_state_locked(cdt, CDT_DISABLE);
1769         if (rc)
1770                 GOTO(out_cdt_state_unlock, rc);
1771
1772         /* send cancel to all running requests */
1773         down_read(&cdt->cdt_request_lock);
1774         list_for_each_entry(car, &cdt->cdt_request_list, car_request_list) {
1775                 mdt_cdt_get_request(car);
1776                 /* request is not yet removed from list, it will be done
1777                  * when copytool will return progress
1778                  */
1779
1780                 if (car->car_hai->hai_action == HSMA_CANCEL) {
1781                         mdt_cdt_put_request(car);
1782                         continue;
1783                 }
1784
1785                 /* needed size */
1786                 hal_len = sizeof(*hal) + cfs_size_round(MTI_NAME_MAXLEN + 1) +
1787                           cfs_size_round(car->car_hai->hai_len);
1788
1789                 if (hal_len > hal_sz && hal_sz > 0) {
1790                         /* not enough room, free old buffer */
1791                         OBD_FREE(hal, hal_sz);
1792                         hal = NULL;
1793                 }
1794
1795                 /* empty buffer, allocate one */
1796                 if (hal == NULL) {
1797                         hal_sz = hal_len;
1798                         OBD_ALLOC(hal, hal_sz);
1799                         if (hal == NULL) {
1800                                 mdt_cdt_put_request(car);
1801                                 up_read(&cdt->cdt_request_lock);
1802                                 GOTO(out_cdt_state, rc = -ENOMEM);
1803                         }
1804                 }
1805
1806                 hal->hal_version = HAL_VERSION;
1807                 obd_uuid2fsname(hal->hal_fsname, mdt_obd_name(mdt),
1808                                 MTI_NAME_MAXLEN);
1809                 hal->hal_fsname[MTI_NAME_MAXLEN] = '\0';
1810                 hal->hal_compound_id = car->car_compound_id;
1811                 hal->hal_archive_id = car->car_archive_id;
1812                 hal->hal_flags = car->car_flags;
1813                 hal->hal_count = 0;
1814
1815                 hai = hai_first(hal);
1816                 memcpy(hai, car->car_hai, car->car_hai->hai_len);
1817                 hai->hai_action = HSMA_CANCEL;
1818                 hal->hal_count = 1;
1819
1820                 /* it is possible to safely call mdt_hsm_agent_send()
1821                  * (ie without a deadlock on cdt_request_lock), because the
1822                  * write lock is taken only if we are not in purge mode
1823                  * (mdt_hsm_agent_send() does not call mdt_cdt_add_request()
1824                  *   nor mdt_cdt_remove_request())
1825                  */
1826                 /* no conflict with cdt thread because cdt is disable and we
1827                  * have the request lock */
1828                 mdt_hsm_agent_send(mti, hal, 1);
1829
1830                 mdt_cdt_put_request(car);
1831         }
1832         up_read(&cdt->cdt_request_lock);
1833
1834         if (hal != NULL)
1835                 OBD_FREE(hal, hal_sz);
1836
1837         /* cancel all on-disk records */
1838         hcad.mdt = mdt;
1839
1840         rc = cdt_llog_process(mti->mti_env, mti->mti_mdt, mdt_cancel_all_cb,
1841                               &hcad, 0, 0, WRITE);
1842 out_cdt_state:
1843         /* Enable coordinator, unless the coordinator was stopping. */
1844         set_cdt_state_locked(cdt, old_state);
1845 out_cdt_state_unlock:
1846         mutex_unlock(&cdt->cdt_state_lock);
1847
1848         lu_context_exit(&session);
1849         lu_context_fini(&session);
1850 out_env:
1851         lu_env_fini(&env);
1852
1853         RETURN(rc);
1854 }
1855
1856 /**
1857  * check if a request is compatible with file status
1858  * \param hai [IN] request description
1859  * \param archive_id [IN] request archive id
1860  * \param rq_flags [IN] request flags
1861  * \param hsm [IN] file HSM metadata
1862  * \retval boolean
1863  */
1864 bool mdt_hsm_is_action_compat(const struct hsm_action_item *hai,
1865                               u32 archive_id, u64 rq_flags,
1866                               const struct md_hsm *hsm)
1867 {
1868         int      is_compat = false;
1869         int      hsm_flags;
1870         ENTRY;
1871
1872         hsm_flags = hsm->mh_flags;
1873         switch (hai->hai_action) {
1874         case HSMA_ARCHIVE:
1875                 if (!(hsm_flags & HS_NOARCHIVE) &&
1876                     (hsm_flags & HS_DIRTY || !(hsm_flags & HS_ARCHIVED)))
1877                         is_compat = true;
1878
1879                 if (hsm_flags & HS_EXISTS &&
1880                     archive_id != 0 &&
1881                     archive_id != hsm->mh_arch_id)
1882                         is_compat = false;
1883
1884                 break;
1885         case HSMA_RESTORE:
1886                 if (!(hsm_flags & HS_DIRTY) && (hsm_flags & HS_RELEASED) &&
1887                     hsm_flags & HS_ARCHIVED && !(hsm_flags & HS_LOST))
1888                         is_compat = true;
1889                 break;
1890         case HSMA_REMOVE:
1891                 if (!(hsm_flags & HS_RELEASED) &&
1892                     (hsm_flags & (HS_ARCHIVED | HS_EXISTS)))
1893                         is_compat = true;
1894                 break;
1895         case HSMA_CANCEL:
1896                 is_compat = true;
1897                 break;
1898         }
1899         CDEBUG(D_HSM, "fid="DFID" action=%s flags=%#llx"
1900                       " extent=%#llx-%#llx hsm_flags=%.8X %s\n",
1901                       PFID(&hai->hai_fid),
1902                       hsm_copytool_action2name(hai->hai_action), rq_flags,
1903                       hai->hai_extent.offset, hai->hai_extent.length,
1904                       hsm->mh_flags,
1905                       (is_compat ? "compatible" : "uncompatible"));
1906
1907         RETURN(is_compat);
1908 }
1909
1910 /*
1911  * /proc interface used to get/set HSM behaviour (cdt->cdt_policy)
1912  */
1913 static const struct {
1914         __u64            bit;
1915         char            *name;
1916         char            *nickname;
1917 } hsm_policy_names[] = {
1918         { CDT_NONBLOCKING_RESTORE,      "NonBlockingRestore",   "NBR"},
1919         { CDT_NORETRY_ACTION,           "NoRetryAction",        "NRA"},
1920         { 0 },
1921 };
1922
1923 /**
1924  * convert a policy name to a bit
1925  * \param name [IN] policy name
1926  * \retval 0 unknown
1927  * \retval   policy bit
1928  */
1929 static __u64 hsm_policy_str2bit(const char *name)
1930 {
1931         int      i;
1932
1933         for (i = 0; hsm_policy_names[i].bit != 0; i++)
1934                 if (strcmp(hsm_policy_names[i].nickname, name) == 0 ||
1935                     strcmp(hsm_policy_names[i].name, name) == 0)
1936                         return hsm_policy_names[i].bit;
1937         return 0;
1938 }
1939
1940 /**
1941  * convert a policy bit field to a string
1942  * \param mask [IN] policy bit field
1943  * \param hexa [IN] print mask before bit names
1944  * \param buffer [OUT] string
1945  * \param count [IN] size of buffer
1946  */
1947 static void hsm_policy_bit2str(struct seq_file *m, const __u64 mask,
1948                                 const bool hexa)
1949 {
1950         int      i, j;
1951         __u64    bit;
1952         ENTRY;
1953
1954         if (hexa)
1955                 seq_printf(m, "(%#llx) ", mask);
1956
1957         for (i = 0; i < CDT_POLICY_SHIFT_COUNT; i++) {
1958                 bit = (1ULL << i);
1959
1960                 for (j = 0; hsm_policy_names[j].bit != 0; j++) {
1961                         if (hsm_policy_names[j].bit == bit)
1962                                 break;
1963                 }
1964                 if (bit & mask)
1965                         seq_printf(m, "[%s] ", hsm_policy_names[j].name);
1966                 else
1967                         seq_printf(m, "%s ", hsm_policy_names[j].name);
1968         }
1969         /* remove last ' ' */
1970         m->count--;
1971         seq_putc(m, '\n');
1972 }
1973
1974 /* methods to read/write HSM policy flags */
1975 static int mdt_hsm_policy_seq_show(struct seq_file *m, void *data)
1976 {
1977         struct mdt_device       *mdt = m->private;
1978         struct coordinator      *cdt = &mdt->mdt_coordinator;
1979         ENTRY;
1980
1981         hsm_policy_bit2str(m, cdt->cdt_policy, false);
1982         RETURN(0);
1983 }
1984
1985 static ssize_t
1986 mdt_hsm_policy_seq_write(struct file *file, const char __user *buffer,
1987                          size_t count, loff_t *off)
1988 {
1989         struct seq_file         *m = file->private_data;
1990         struct mdt_device       *mdt = m->private;
1991         struct coordinator      *cdt = &mdt->mdt_coordinator;
1992         char                    *start, *token, sign;
1993         char                    *buf;
1994         __u64                    policy;
1995         __u64                    add_mask, remove_mask, set_mask;
1996         int                      rc;
1997         ENTRY;
1998
1999         if (count + 1 > PAGE_SIZE)
2000                 RETURN(-EINVAL);
2001
2002         OBD_ALLOC(buf, count + 1);
2003         if (buf == NULL)
2004                 RETURN(-ENOMEM);
2005
2006         if (copy_from_user(buf, buffer, count))
2007                 GOTO(out, rc = -EFAULT);
2008
2009         buf[count] = '\0';
2010
2011         start = buf;
2012         CDEBUG(D_HSM, "%s: receive new policy: '%s'\n", mdt_obd_name(mdt),
2013                start);
2014
2015         add_mask = remove_mask = set_mask = 0;
2016         do {
2017                 token = strsep(&start, "\n ");
2018                 sign = *token;
2019
2020                 if (sign == '\0')
2021                         continue;
2022
2023                 if (sign == '-' || sign == '+')
2024                         token++;
2025
2026                 policy = hsm_policy_str2bit(token);
2027                 if (policy == 0) {
2028                         CWARN("%s: '%s' is unknown, "
2029                               "supported policies are:\n", mdt_obd_name(mdt),
2030                               token);
2031                         hsm_policy_bit2str(m, 0, false);
2032                         GOTO(out, rc = -EINVAL);
2033                 }
2034                 switch (sign) {
2035                 case '-':
2036                         remove_mask |= policy;
2037                         break;
2038                 case '+':
2039                         add_mask |= policy;
2040                         break;
2041                 default:
2042                         set_mask |= policy;
2043                         break;
2044                 }
2045
2046         } while (start != NULL);
2047
2048         CDEBUG(D_HSM, "%s: new policy: rm=%#llx add=%#llx set=%#llx\n",
2049                mdt_obd_name(mdt), remove_mask, add_mask, set_mask);
2050
2051         /* if no sign in all string, it is a clear and set
2052          * if some sign found, all unsigned are converted
2053          * to add
2054          * P1 P2 = set to P1 and P2
2055          * P1 -P2 = add P1 clear P2 same as +P1 -P2
2056          */
2057         if (remove_mask == 0 && add_mask == 0) {
2058                 cdt->cdt_policy = set_mask;
2059         } else {
2060                 cdt->cdt_policy |= set_mask | add_mask;
2061                 cdt->cdt_policy &= ~remove_mask;
2062         }
2063
2064         GOTO(out, rc = count);
2065
2066 out:
2067         OBD_FREE(buf, count + 1);
2068         RETURN(rc);
2069 }
2070 LPROC_SEQ_FOPS(mdt_hsm_policy);
2071
2072 #define GENERATE_PROC_METHOD(VAR)                                       \
2073 static int mdt_hsm_##VAR##_seq_show(struct seq_file *m, void *data)     \
2074 {                                                                       \
2075         struct mdt_device       *mdt = m->private;                      \
2076         struct coordinator      *cdt = &mdt->mdt_coordinator;           \
2077         ENTRY;                                                          \
2078                                                                         \
2079         seq_printf(m, "%llu\n", (__u64)cdt->VAR);                       \
2080         RETURN(0);                                                      \
2081 }                                                                       \
2082 static ssize_t                                                          \
2083 mdt_hsm_##VAR##_seq_write(struct file *file, const char __user *buffer, \
2084                           size_t count, loff_t *off)                    \
2085                                                                         \
2086 {                                                                       \
2087         struct seq_file         *m = file->private_data;                \
2088         struct mdt_device       *mdt = m->private;                      \
2089         struct coordinator      *cdt = &mdt->mdt_coordinator;           \
2090         __s64                    val;                                   \
2091         int                      rc;                                    \
2092         ENTRY;                                                          \
2093                                                                         \
2094         rc = lprocfs_str_to_s64(buffer, count, &val);                   \
2095         if (rc)                                                         \
2096                 RETURN(rc);                                             \
2097         if (val > 0 && val < INT_MAX) {                                 \
2098                 cdt->VAR = val;                                         \
2099                 RETURN(count);                                          \
2100         }                                                               \
2101         RETURN(-EINVAL);                                                \
2102 }                                                                       \
2103
2104 GENERATE_PROC_METHOD(cdt_loop_period)
2105 GENERATE_PROC_METHOD(cdt_grace_delay)
2106 GENERATE_PROC_METHOD(cdt_active_req_timeout)
2107 GENERATE_PROC_METHOD(cdt_max_requests)
2108 GENERATE_PROC_METHOD(cdt_default_archive_id)
2109
2110 /*
2111  * procfs write method for MDT/hsm_control
2112  * proc entry is in mdt directory so data is mdt obd_device pointer
2113  */
2114 #define CDT_ENABLE_CMD   "enabled"
2115 #define CDT_STOP_CMD     "shutdown"
2116 #define CDT_DISABLE_CMD  "disabled"
2117 #define CDT_PURGE_CMD    "purge"
2118 #define CDT_HELP_CMD     "help"
2119 #define CDT_MAX_CMD_LEN  10
2120
2121 ssize_t
2122 mdt_hsm_cdt_control_seq_write(struct file *file, const char __user *buffer,
2123                               size_t count, loff_t *off)
2124 {
2125         struct seq_file         *m = file->private_data;
2126         struct obd_device       *obd = m->private;
2127         struct mdt_device       *mdt = mdt_dev(obd->obd_lu_dev);
2128         struct coordinator      *cdt = &(mdt->mdt_coordinator);
2129         int                      rc, usage = 0;
2130         char                     kernbuf[CDT_MAX_CMD_LEN];
2131         ENTRY;
2132
2133         if (count == 0 || count >= sizeof(kernbuf))
2134                 RETURN(-EINVAL);
2135
2136         if (copy_from_user(kernbuf, buffer, count))
2137                 RETURN(-EFAULT);
2138         kernbuf[count] = 0;
2139
2140         if (kernbuf[count - 1] == '\n')
2141                 kernbuf[count - 1] = 0;
2142
2143         rc = 0;
2144         if (strcmp(kernbuf, CDT_ENABLE_CMD) == 0) {
2145                 if (cdt->cdt_state == CDT_DISABLE) {
2146                         rc = set_cdt_state(cdt, CDT_RUNNING);
2147                         mdt_hsm_cdt_event(cdt);
2148                         wake_up(&cdt->cdt_waitq);
2149                 } else {
2150                         rc = mdt_hsm_cdt_start(mdt);
2151                 }
2152         } else if (strcmp(kernbuf, CDT_STOP_CMD) == 0) {
2153                 if ((cdt->cdt_state == CDT_STOPPING) ||
2154                     (cdt->cdt_state == CDT_STOPPED)) {
2155                         CERROR("%s: Coordinator already stopped\n",
2156                                mdt_obd_name(mdt));
2157                         rc = -EALREADY;
2158                 } else {
2159                         rc = mdt_hsm_cdt_stop(mdt);
2160                 }
2161         } else if (strcmp(kernbuf, CDT_DISABLE_CMD) == 0) {
2162                 if ((cdt->cdt_state == CDT_STOPPING) ||
2163                     (cdt->cdt_state == CDT_STOPPED)) {
2164                         CERROR("%s: Coordinator is stopped\n",
2165                                mdt_obd_name(mdt));
2166                         rc = -EINVAL;
2167                 } else {
2168                         rc = set_cdt_state(cdt, CDT_DISABLE);
2169                 }
2170         } else if (strcmp(kernbuf, CDT_PURGE_CMD) == 0) {
2171                 rc = hsm_cancel_all_actions(mdt);
2172         } else if (strcmp(kernbuf, CDT_HELP_CMD) == 0) {
2173                 usage = 1;
2174         } else {
2175                 usage = 1;
2176                 rc = -EINVAL;
2177         }
2178
2179         if (usage == 1)
2180                 CERROR("%s: Valid coordinator control commands are: "
2181                        "%s %s %s %s %s\n", mdt_obd_name(mdt),
2182                        CDT_ENABLE_CMD, CDT_STOP_CMD, CDT_DISABLE_CMD,
2183                        CDT_PURGE_CMD, CDT_HELP_CMD);
2184
2185         if (rc)
2186                 RETURN(rc);
2187
2188         RETURN(count);
2189 }
2190
2191 int mdt_hsm_cdt_control_seq_show(struct seq_file *m, void *data)
2192 {
2193         struct obd_device       *obd = m->private;
2194         struct coordinator      *cdt;
2195         ENTRY;
2196
2197         cdt = &(mdt_dev(obd->obd_lu_dev)->mdt_coordinator);
2198
2199         seq_printf(m, "%s\n", cdt_mdt_state2str(cdt->cdt_state));
2200
2201         RETURN(0);
2202 }
2203
2204 static int
2205 mdt_hsm_request_mask_show(struct seq_file *m, __u64 mask)
2206 {
2207         bool first = true;
2208         int i;
2209         ENTRY;
2210
2211         for (i = 0; i < 8 * sizeof(mask); i++) {
2212                 if (mask & (1UL << i)) {
2213                         seq_printf(m, "%s%s", first ? "" : " ",
2214                                    hsm_copytool_action2name(i));
2215                         first = false;
2216                 }
2217         }
2218         seq_putc(m, '\n');
2219
2220         RETURN(0);
2221 }
2222
2223 static int
2224 mdt_hsm_user_request_mask_seq_show(struct seq_file *m, void *data)
2225 {
2226         struct mdt_device *mdt = m->private;
2227         struct coordinator *cdt = &mdt->mdt_coordinator;
2228
2229         return mdt_hsm_request_mask_show(m, cdt->cdt_user_request_mask);
2230 }
2231
2232 static int
2233 mdt_hsm_group_request_mask_seq_show(struct seq_file *m, void *data)
2234 {
2235         struct mdt_device *mdt = m->private;
2236         struct coordinator *cdt = &mdt->mdt_coordinator;
2237
2238         return mdt_hsm_request_mask_show(m, cdt->cdt_group_request_mask);
2239 }
2240
2241 static int
2242 mdt_hsm_other_request_mask_seq_show(struct seq_file *m, void *data)
2243 {
2244         struct mdt_device *mdt = m->private;
2245         struct coordinator *cdt = &mdt->mdt_coordinator;
2246
2247         return mdt_hsm_request_mask_show(m, cdt->cdt_other_request_mask);
2248 }
2249
2250 static inline enum hsm_copytool_action
2251 hsm_copytool_name2action(const char *name)
2252 {
2253         if (strcasecmp(name, "NOOP") == 0)
2254                 return HSMA_NONE;
2255         else if (strcasecmp(name, "ARCHIVE") == 0)
2256                 return HSMA_ARCHIVE;
2257         else if (strcasecmp(name, "RESTORE") == 0)
2258                 return HSMA_RESTORE;
2259         else if (strcasecmp(name, "REMOVE") == 0)
2260                 return HSMA_REMOVE;
2261         else if (strcasecmp(name, "CANCEL") == 0)
2262                 return HSMA_CANCEL;
2263         else
2264                 return -1;
2265 }
2266
2267 static ssize_t
2268 mdt_write_hsm_request_mask(struct file *file, const char __user *user_buf,
2269                             size_t user_count, __u64 *mask)
2270 {
2271         char *buf, *pos, *name;
2272         size_t buf_size;
2273         __u64 new_mask = 0;
2274         int rc;
2275         ENTRY;
2276
2277         if (!(user_count < 4096))
2278                 RETURN(-ENOMEM);
2279
2280         buf_size = user_count + 1;
2281
2282         OBD_ALLOC(buf, buf_size);
2283         if (buf == NULL)
2284                 RETURN(-ENOMEM);
2285
2286         if (copy_from_user(buf, user_buf, buf_size - 1))
2287                 GOTO(out, rc = -EFAULT);
2288
2289         buf[buf_size - 1] = '\0';
2290
2291         pos = buf;
2292         while ((name = strsep(&pos, " \t\v\n")) != NULL) {
2293                 int action;
2294
2295                 if (*name == '\0')
2296                         continue;
2297
2298                 action = hsm_copytool_name2action(name);
2299                 if (action < 0)
2300                         GOTO(out, rc = -EINVAL);
2301
2302                 new_mask |= (1UL << action);
2303         }
2304
2305         *mask = new_mask;
2306         rc = user_count;
2307 out:
2308         OBD_FREE(buf, buf_size);
2309
2310         RETURN(rc);
2311 }
2312
2313 static ssize_t
2314 mdt_hsm_user_request_mask_seq_write(struct file *file, const char __user *buf,
2315                                         size_t count, loff_t *off)
2316 {
2317         struct seq_file         *m = file->private_data;
2318         struct mdt_device       *mdt = m->private;
2319         struct coordinator *cdt = &mdt->mdt_coordinator;
2320
2321         return mdt_write_hsm_request_mask(file, buf, count,
2322                                            &cdt->cdt_user_request_mask);
2323 }
2324
2325 static ssize_t
2326 mdt_hsm_group_request_mask_seq_write(struct file *file, const char __user *buf,
2327                                         size_t count, loff_t *off)
2328 {
2329         struct seq_file         *m = file->private_data;
2330         struct mdt_device       *mdt = m->private;
2331         struct coordinator      *cdt = &mdt->mdt_coordinator;
2332
2333         return mdt_write_hsm_request_mask(file, buf, count,
2334                                            &cdt->cdt_group_request_mask);
2335 }
2336
2337 static ssize_t
2338 mdt_hsm_other_request_mask_seq_write(struct file *file, const char __user *buf,
2339                                         size_t count, loff_t *off)
2340 {
2341         struct seq_file         *m = file->private_data;
2342         struct mdt_device       *mdt = m->private;
2343         struct coordinator      *cdt = &mdt->mdt_coordinator;
2344
2345         return mdt_write_hsm_request_mask(file, buf, count,
2346                                            &cdt->cdt_other_request_mask);
2347 }
2348
2349 static int mdt_hsm_cdt_raolu_seq_show(struct seq_file *m, void *data)
2350 {
2351         struct mdt_device *mdt = m->private;
2352         struct coordinator *cdt = &mdt->mdt_coordinator;
2353         ENTRY;
2354
2355         seq_printf(m, "%d\n", (int)cdt->cdt_remove_archive_on_last_unlink);
2356         RETURN(0);
2357 }
2358
2359 static ssize_t
2360 mdt_hsm_cdt_raolu_seq_write(struct file *file, const char __user *buffer,
2361                             size_t count, loff_t *off)
2362
2363 {
2364         struct seq_file *m = file->private_data;
2365         struct mdt_device *mdt = m->private;
2366         struct coordinator *cdt = &mdt->mdt_coordinator;
2367         __s64 val;
2368         int rc;
2369         ENTRY;
2370
2371         rc = lprocfs_str_to_s64(buffer, count, &val);
2372         if (rc < 0)
2373                 RETURN(rc);
2374
2375         cdt->cdt_remove_archive_on_last_unlink = val;
2376         RETURN(count);
2377 }
2378
2379 LPROC_SEQ_FOPS(mdt_hsm_cdt_loop_period);
2380 LPROC_SEQ_FOPS(mdt_hsm_cdt_grace_delay);
2381 LPROC_SEQ_FOPS(mdt_hsm_cdt_active_req_timeout);
2382 LPROC_SEQ_FOPS(mdt_hsm_cdt_max_requests);
2383 LPROC_SEQ_FOPS(mdt_hsm_cdt_default_archive_id);
2384 LPROC_SEQ_FOPS(mdt_hsm_user_request_mask);
2385 LPROC_SEQ_FOPS(mdt_hsm_group_request_mask);
2386 LPROC_SEQ_FOPS(mdt_hsm_other_request_mask);
2387 LPROC_SEQ_FOPS(mdt_hsm_cdt_raolu);
2388
2389 /* Read-only proc files for request counters */
2390 static int mdt_hsm_cdt_archive_count_seq_show(struct seq_file *m, void *data)
2391 {
2392         struct mdt_device *mdt = m->private;
2393         struct coordinator *cdt = &mdt->mdt_coordinator;
2394         ENTRY;
2395
2396         seq_printf(m, "%d\n", atomic_read(&cdt->cdt_archive_count));
2397         RETURN(0);
2398 }
2399
2400 static int mdt_hsm_cdt_restore_count_seq_show(struct seq_file *m, void *data)
2401 {
2402         struct mdt_device *mdt = m->private;
2403         struct coordinator *cdt = &mdt->mdt_coordinator;
2404         ENTRY;
2405
2406         seq_printf(m, "%d\n", atomic_read(&cdt->cdt_restore_count));
2407         RETURN(0);
2408 }
2409
2410 static int mdt_hsm_cdt_remove_count_seq_show(struct seq_file *m, void *data)
2411 {
2412         struct mdt_device *mdt = m->private;
2413         struct coordinator *cdt = &mdt->mdt_coordinator;
2414         ENTRY;
2415
2416         seq_printf(m, "%d\n", atomic_read(&cdt->cdt_remove_count));
2417         RETURN(0);
2418 }
2419
2420 LPROC_SEQ_FOPS_RO(mdt_hsm_cdt_archive_count);
2421 LPROC_SEQ_FOPS_RO(mdt_hsm_cdt_restore_count);
2422 LPROC_SEQ_FOPS_RO(mdt_hsm_cdt_remove_count);
2423
2424 static struct lprocfs_vars lprocfs_mdt_hsm_vars[] = {
2425         { .name =       "agents",
2426           .fops =       &mdt_hsm_agent_fops                     },
2427         { .name =       "actions",
2428           .fops =       &mdt_hsm_actions_fops,
2429           .proc_mode =  0444                                    },
2430         { .name =       "default_archive_id",
2431           .fops =       &mdt_hsm_cdt_default_archive_id_fops    },
2432         { .name =       "grace_delay",
2433           .fops =       &mdt_hsm_cdt_grace_delay_fops           },
2434         { .name =       "loop_period",
2435           .fops =       &mdt_hsm_cdt_loop_period_fops           },
2436         { .name =       "max_requests",
2437           .fops =       &mdt_hsm_cdt_max_requests_fops          },
2438         { .name =       "policy",
2439           .fops =       &mdt_hsm_policy_fops                    },
2440         { .name =       "active_request_timeout",
2441           .fops =       &mdt_hsm_cdt_active_req_timeout_fops    },
2442         { .name =       "active_requests",
2443           .fops =       &mdt_hsm_active_requests_fops           },
2444         { .name =       "user_request_mask",
2445           .fops =       &mdt_hsm_user_request_mask_fops,        },
2446         { .name =       "group_request_mask",
2447           .fops =       &mdt_hsm_group_request_mask_fops,       },
2448         { .name =       "other_request_mask",
2449           .fops =       &mdt_hsm_other_request_mask_fops,       },
2450         { .name =       "remove_archive_on_last_unlink",
2451           .fops =       &mdt_hsm_cdt_raolu_fops,                },
2452         { .name =       "archive_count",
2453           .fops =       &mdt_hsm_cdt_archive_count_fops,        },
2454         { .name =       "restore_count",
2455           .fops =       &mdt_hsm_cdt_restore_count_fops,        },
2456         { .name =       "remove_count",
2457           .fops =       &mdt_hsm_cdt_remove_count_fops,         },
2458         { 0 }
2459 };