lustre/osd-ldiskfs/osd_scrub.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, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2012, 2017, Intel Corporation.
  24  */
  25 /*
  26  * lustre/osd-ldiskfs/osd_scrub.c
  27  *
  28  * Top-level entry points into osd module
  29  *
  30  * The OI scrub is used for rebuilding Object Index files when restores MDT from
  31  * file-level backup.
  32  *
  33  * The otable based iterator scans ldiskfs inode table to feed up layer LFSCK.
  34  *
  35  * Author: Fan Yong <yong.fan@whamcloud.com>
  36  */
  37
  38 #define DEBUG_SUBSYSTEM S_LFSCK
  39
  40 #include <linux/kthread.h>
  41 #include <uapi/linux/lustre/lustre_idl.h>
  42 #include <lustre_disk.h>
  43 #include <dt_object.h>
  44 #include <linux/xattr.h>
  45 #include <lustre_scrub.h>
  46 #include <lustre_nodemap.h>
  47
  48 #include "osd_internal.h"
  49 #include "osd_oi.h"
  50 #include "osd_scrub.h"
  51
  52 #define OSD_OTABLE_MAX_HASH             0x00000000ffffffffULL
  53
  54 static inline int osd_scrub_has_window(struct lustre_scrub *scrub,
  55                                        struct osd_otable_cache *ooc)
  56 {
  57         return scrub->os_pos_current < ooc->ooc_pos_preload + SCRUB_WINDOW_SIZE;
  58 }
  59
  60 /**
  61  * update/insert/delete the specified OI mapping (@fid @id) according to the ops
  62  *
  63  * \retval   1, changed nothing
  64  * \retval   0, changed successfully
  65  * \retval -ve, on error
  66  */
  67 static int osd_scrub_refresh_mapping(struct osd_thread_info *info,
  68                                      struct osd_device *dev,
  69                                      const struct lu_fid *fid,
  70                                      const struct osd_inode_id *id,
  71                                      int ops, bool force,
  72                                      enum oi_check_flags flags, bool *exist)
  73 {
  74         handle_t *th;
  75         int       rc;
  76         ENTRY;
  77
  78         if (dev->od_scrub.os_scrub.os_file.sf_param & SP_DRYRUN && !force)
  79                 RETURN(0);
  80
  81         /* DTO_INDEX_INSERT is enough for other two ops:
  82          * delete/update, but save stack. */
  83         th = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC,
  84                                 osd_dto_credits_noquota[DTO_INDEX_INSERT]);
  85         if (IS_ERR(th)) {
  86                 rc = PTR_ERR(th);
  87                 CDEBUG(D_LFSCK, "%s: fail to start trans for scrub op %d "
  88                        DFID" => %u/%u: rc = %d\n", osd_name(dev), ops,
  89                        PFID(fid), id ? id->oii_ino : -1, id ? id->oii_gen : -1,
  90                        rc);
  91                 RETURN(rc);
  92         }
  93
  94         switch (ops) {
  95         case DTO_INDEX_UPDATE:
  96                 rc = osd_oi_update(info, dev, fid, id, th, flags);
  97                 if (unlikely(rc == -ENOENT)) {
  98                         /* Some unlink thread may removed the OI mapping. */
  99                         rc = 1;
 100                 }
 101                 break;
 102         case DTO_INDEX_INSERT:
 103                 rc = osd_oi_insert(info, dev, fid, id, th, flags, exist);
 104                 if (unlikely(rc == -EEXIST)) {
 105                         rc = 1;
 106                         /* XXX: There are trouble things when adding OI
 107                          *      mapping for IGIF object, which may cause
 108                          *      multiple objects to be mapped to the same
 109                          *      IGIF formatted FID. Consider the following
 110                          *      situations:
 111                          *
 112                          *      1) The MDT is upgrading from 1.8 device.
 113                          *      The OI scrub generates IGIF FID1 for the
 114                          *      OBJ1 and adds the OI mapping.
 115                          *
 116                          *      2) For some reason, the OI scrub does not
 117                          *      process all the IGIF objects completely.
 118                          *
 119                          *      3) The MDT is backuped and restored against
 120                          *      this device.
 121                          *
 122                          *      4) When the MDT mounts up, the OI scrub will
 123                          *      try to rebuild the OI files. For some IGIF
 124                          *      object, OBJ2, which was not processed by the
 125                          *      OI scrub before the backup/restore, and the
 126                          *      new generated IGIF formatted FID may be just
 127                          *      the FID1, the same as OBJ1.
 128                          *
 129                          *      Under such case, the OI scrub cannot know how
 130                          *      to generate new FID for the OBJ2.
 131                          *
 132                          *      Currently, we do nothing for that. One possible
 133                          *      solution is to generate new normal FID for the
 134                          *      conflict object.
 135                          *
 136                          *      Anyway, it is rare, only exists in theory. */
 137                 }
 138                 break;
 139         case DTO_INDEX_DELETE:
 140                 rc = osd_oi_delete(info, dev, fid, th, flags);
 141                 if (rc == -ENOENT) {
 142                         /* It is normal that the unlink thread has removed the
 143                          * OI mapping already. */
 144                         rc = 1;
 145                 }
 146                 break;
 147         default:
 148                 LASSERTF(0, "Unexpected ops %d\n", ops);
 149                 break;
 150         }
 151
 152         ldiskfs_journal_stop(th);
 153         if (rc < 0)
 154                 CDEBUG(D_LFSCK, "%s: fail to refresh OI map for scrub op %d "
 155                        DFID" => %u/%u: rc = %d\n", osd_name(dev), ops,
 156                        PFID(fid), id ? id->oii_ino : -1, id ? id->oii_gen : -1,
 157                        rc);
 158
 159         RETURN(rc);
 160 }
 161
 162 static int
 163 osd_scrub_convert_ff(struct osd_thread_info *info, struct osd_device *dev,
 164                      struct inode *inode, const struct lu_fid *fid)
 165 {
 166         struct filter_fid_18_23 *ff = &info->oti_ff_old;
 167         struct dentry *dentry = &info->oti_obj_dentry;
 168         struct lu_fid *tfid = &info->oti_fid;
 169         bool fid_18_23 = false;
 170         handle_t *jh;
 171         int size = 0;
 172         int rc;
 173         ENTRY;
 174
 175         if (dev->od_scrub.os_scrub.os_file.sf_param & SP_DRYRUN)
 176                 RETURN(0);
 177
 178         if (fid_is_idif(fid) && dev->od_index_in_idif == 0) {
 179                 struct ost_id *oi = &info->oti_ostid;
 180
 181                 fid_to_ostid(fid, oi);
 182                 ostid_to_fid(tfid, oi, 0);
 183         } else {
 184                 *tfid = *fid;
 185         }
 186
 187         /* We want the LMA to fit into the 256-byte OST inode, so operate
 188          * as following:
 189          * 1) read old XATTR_NAME_FID and save the parent FID;
 190          * 2) delete the old XATTR_NAME_FID;
 191          * 3) make new LMA and add it;
 192          * 4) generate new XATTR_NAME_FID with the saved parent FID and add it.
 193          *
 194          * Making the LMA to fit into the 256-byte OST inode can save time for
 195          * normal osd_check_lma() and for other OI scrub scanning in future.
 196          * So it is worth to make some slow conversion here. */
 197         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC,
 198                                 osd_dto_credits_noquota[DTO_XATTR_SET] * 3);
 199         if (IS_ERR(jh)) {
 200                 rc = PTR_ERR(jh);
 201                 CDEBUG(D_LFSCK, "%s: fail to start trans for convert ff "
 202                        DFID": rc = %d\n", osd_name(dev), PFID(tfid), rc);
 203                 RETURN(rc);
 204         }
 205
 206         /* 1) read old XATTR_NAME_FID and save the parent FID */
 207         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 208         if (rc == sizeof(*ff)) {
 209                 /* 2) delete the old XATTR_NAME_FID */
 210                 dquot_initialize(inode);
 211                 rc = osd_removexattr(dentry, inode, XATTR_NAME_FID);
 212                 if (rc)
 213                         GOTO(stop, rc);
 214
 215                 fid_18_23 = true;
 216         } else if (rc != -ENODATA && rc < (int)sizeof(struct filter_fid_24_29)) {
 217                 GOTO(stop, rc = -EINVAL);
 218         }
 219
 220         /* 3) make new LMA and add it */
 221         rc = osd_ea_fid_set(info, inode, tfid, LMAC_FID_ON_OST, 0);
 222         if (fid_18_23) {
 223                 if (rc)
 224                         /* If failed, we should try to add the old back. */
 225                         size = sizeof(*ff);
 226                 else
 227                         /* The new PFID EA will only contains ::ff_parent */
 228                         size = sizeof(ff->ff_parent);
 229         }
 230
 231         /* 4) generate new XATTR_NAME_FID with the saved parent FID and add it*/
 232         if (size > 0) {
 233                 int rc1;
 234
 235                 rc1 = __osd_xattr_set(info, inode, XATTR_NAME_FID, ff, size,
 236                                       XATTR_CREATE);
 237                 if (rc1 != 0 && rc == 0)
 238                         rc = rc1;
 239         }
 240
 241         GOTO(stop, rc);
 242
 243 stop:
 244         ldiskfs_journal_stop(jh);
 245         if (rc < 0)
 246                 CDEBUG(D_LFSCK, "%s: fail to convert ff "DFID": rc = %d\n",
 247                        osd_name(dev), PFID(tfid), rc);
 248         return rc;
 249 }
 250
 251 static int
 252 osd_scrub_check_update(struct osd_thread_info *info, struct osd_device *dev,
 253                        struct osd_idmap_cache *oic, int val)
 254 {
 255         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 256         struct scrub_file            *sf     = &scrub->os_file;
 257         struct lu_fid                *fid    = &oic->oic_fid;
 258         struct osd_inode_id          *lid    = &oic->oic_lid;
 259         struct osd_inode_id          *lid2   = &info->oti_id;
 260         struct osd_inconsistent_item *oii    = NULL;
 261         struct inode                 *inode  = NULL;
 262         int                           ops    = DTO_INDEX_UPDATE;
 263         int                           rc;
 264         bool                          converted = false;
 265         bool                          exist     = false;
 266         ENTRY;
 267
 268         down_write(&scrub->os_rwsem);
 269         scrub->os_new_checked++;
 270         if (val < 0)
 271                 GOTO(out, rc = val);
 272
 273         if (scrub->os_in_prior)
 274                 oii = list_entry(oic, struct osd_inconsistent_item,
 275                                  oii_cache);
 276
 277         if (lid->oii_ino < sf->sf_pos_latest_start && oii == NULL)
 278                 GOTO(out, rc = 0);
 279
 280         if (fid_is_igif(fid))
 281                 sf->sf_items_igif++;
 282
 283         if (val == SCRUB_NEXT_OSTOBJ_OLD) {
 284                 inode = osd_iget(info, dev, lid);
 285                 if (IS_ERR(inode)) {
 286                         rc = PTR_ERR(inode);
 287                         /* Someone removed the inode. */
 288                         if (rc == -ENOENT || rc == -ESTALE)
 289                                 rc = 0;
 290                         GOTO(out, rc);
 291                 }
 292
 293                 /* The inode has been reused as EA inode, ignore it. */
 294                 if (unlikely(osd_is_ea_inode(inode)))
 295                         GOTO(out, rc = 0);
 296
 297                 sf->sf_flags |= SF_UPGRADE;
 298                 sf->sf_internal_flags &= ~SIF_NO_HANDLE_OLD_FID;
 299                 dev->od_check_ff = 1;
 300                 rc = osd_scrub_convert_ff(info, dev, inode, fid);
 301                 if (rc != 0)
 302                         GOTO(out, rc);
 303
 304                 converted = true;
 305         }
 306
 307         if ((val == SCRUB_NEXT_NOLMA) &&
 308             (!scrub->os_convert_igif || OBD_FAIL_CHECK(OBD_FAIL_FID_NOLMA)))
 309                 GOTO(out, rc = 0);
 310
 311         if ((oii != NULL && oii->oii_insert) || (val == SCRUB_NEXT_NOLMA)) {
 312                 ops = DTO_INDEX_INSERT;
 313
 314                 goto iget;
 315         }
 316
 317         rc = osd_oi_lookup(info, dev, fid, lid2,
 318                 (val == SCRUB_NEXT_OSTOBJ ||
 319                  val == SCRUB_NEXT_OSTOBJ_OLD) ? OI_KNOWN_ON_OST : 0);
 320         if (rc != 0) {
 321                 if (rc == -ENOENT)
 322                         ops = DTO_INDEX_INSERT;
 323                 else if (rc != -ESTALE)
 324                         GOTO(out, rc);
 325
 326 iget:
 327                 if (inode == NULL) {
 328                         inode = osd_iget(info, dev, lid);
 329                         if (IS_ERR(inode)) {
 330                                 rc = PTR_ERR(inode);
 331                                 /* Someone removed the inode. */
 332                                 if (rc == -ENOENT || rc == -ESTALE)
 333                                         rc = 0;
 334                                 GOTO(out, rc);
 335                         }
 336
 337                         /* The inode has been reused as EA inode, ignore it. */
 338                         if (unlikely(osd_is_ea_inode(inode)))
 339                                 GOTO(out, rc = 0);
 340                 }
 341
 342                 if (!scrub->os_partial_scan)
 343                         scrub->os_full_speed = 1;
 344
 345                 switch (val) {
 346                 case SCRUB_NEXT_NOLMA:
 347                         sf->sf_flags |= SF_UPGRADE;
 348                         if (!(sf->sf_param & SP_DRYRUN)) {
 349                                 rc = osd_ea_fid_set(info, inode, fid, 0, 0);
 350                                 if (rc != 0)
 351                                         GOTO(out, rc);
 352                         }
 353
 354                         if (!(sf->sf_flags & SF_INCONSISTENT))
 355                                 dev->od_igif_inoi = 0;
 356                         break;
 357                 case SCRUB_NEXT_OSTOBJ:
 358                         sf->sf_flags |= SF_INCONSISTENT;
 359                 case SCRUB_NEXT_OSTOBJ_OLD:
 360                         break;
 361                 default:
 362                         break;
 363                 }
 364         } else if (osd_id_eq(lid, lid2)) {
 365                 if (converted)
 366                         sf->sf_items_updated++;
 367
 368                 GOTO(out, rc = 0);
 369         } else {
 370                 if (!scrub->os_partial_scan)
 371                         scrub->os_full_speed = 1;
 372
 373                 sf->sf_flags |= SF_INCONSISTENT;
 374
 375                 /* XXX: If the device is restored from file-level backup, then
 376                  *      some IGIFs may have been already in OI files, and some
 377                  *      may be not yet. Means upgrading from 1.8 may be partly
 378                  *      processed, but some clients may hold some immobilized
 379                  *      IGIFs, and use them to access related objects. Under
 380                  *      such case, OSD does not know whether an given IGIF has
 381                  *      been processed or to be processed, and it also cannot
 382                  *      generate local ino#/gen# directly from the immobilized
 383                  *      IGIF because of the backup/restore. Then force OSD to
 384                  *      lookup the given IGIF in OI files, and if no entry,
 385                  *      then ask the client to retry after upgrading completed.
 386                  *      No better choice. */
 387                 dev->od_igif_inoi = 1;
 388         }
 389
 390         rc = osd_scrub_refresh_mapping(info, dev, fid, lid, ops, false,
 391                         (val == SCRUB_NEXT_OSTOBJ ||
 392                          val == SCRUB_NEXT_OSTOBJ_OLD) ? OI_KNOWN_ON_OST : 0,
 393                         &exist);
 394         if (rc == 0) {
 395                 if (scrub->os_in_prior)
 396                         sf->sf_items_updated_prior++;
 397                 else
 398                         sf->sf_items_updated++;
 399
 400                 if (ops == DTO_INDEX_INSERT && val == 0 && !exist) {
 401                         int idx = osd_oi_fid2idx(dev, fid);
 402
 403                         sf->sf_flags |= SF_RECREATED;
 404                         if (unlikely(!ldiskfs_test_bit(idx, sf->sf_oi_bitmap)))
 405                                 ldiskfs_set_bit(idx, sf->sf_oi_bitmap);
 406                 }
 407         }
 408
 409         GOTO(out, rc);
 410
 411 out:
 412         if (rc < 0) {
 413                 sf->sf_items_failed++;
 414                 if (sf->sf_pos_first_inconsistent == 0 ||
 415                     sf->sf_pos_first_inconsistent > lid->oii_ino)
 416                         sf->sf_pos_first_inconsistent = lid->oii_ino;
 417         } else {
 418                 rc = 0;
 419         }
 420
 421         /* There may be conflict unlink during the OI scrub,
 422          * if happend, then remove the new added OI mapping. */
 423         if (ops == DTO_INDEX_INSERT && inode != NULL && !IS_ERR(inode) &&
 424             unlikely(ldiskfs_test_inode_state(inode,
 425                                               LDISKFS_STATE_LUSTRE_DESTROY)))
 426                 osd_scrub_refresh_mapping(info, dev, fid, lid,
 427                                 DTO_INDEX_DELETE, false,
 428                                 (val == SCRUB_NEXT_OSTOBJ ||
 429                                  val == SCRUB_NEXT_OSTOBJ_OLD) ?
 430                                 OI_KNOWN_ON_OST : 0, NULL);
 431         up_write(&scrub->os_rwsem);
 432
 433         if (inode != NULL && !IS_ERR(inode))
 434                 iput(inode);
 435
 436         if (oii != NULL) {
 437                 spin_lock(&scrub->os_lock);
 438                 if (likely(!list_empty(&oii->oii_list)))
 439                         list_del(&oii->oii_list);
 440                 spin_unlock(&scrub->os_lock);
 441
 442                 OBD_FREE_PTR(oii);
 443         }
 444
 445         RETURN(sf->sf_param & SP_FAILOUT ? rc : 0);
 446 }
 447
 448 static int osd_scrub_prep(const struct lu_env *env, struct osd_device *dev)
 449 {
 450         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 451         struct ptlrpc_thread *thread = &scrub->os_thread;
 452         struct scrub_file    *sf     = &scrub->os_file;
 453         __u32                 flags  = scrub->os_start_flags;
 454         int                   rc;
 455         bool                  drop_dryrun = false;
 456         ENTRY;
 457
 458         CDEBUG(D_LFSCK, "%s: OI scrub prep, flags = 0x%x\n",
 459                osd_scrub2name(scrub), flags);
 460
 461         down_write(&scrub->os_rwsem);
 462         if (flags & SS_SET_FAILOUT)
 463                 sf->sf_param |= SP_FAILOUT;
 464         else if (flags & SS_CLEAR_FAILOUT)
 465                 sf->sf_param &= ~SP_FAILOUT;
 466
 467         if (flags & SS_SET_DRYRUN) {
 468                 sf->sf_param |= SP_DRYRUN;
 469         } else if (flags & SS_CLEAR_DRYRUN && sf->sf_param & SP_DRYRUN) {
 470                 sf->sf_param &= ~SP_DRYRUN;
 471                 drop_dryrun = true;
 472         }
 473
 474         if (flags & SS_RESET)
 475                 scrub_file_reset(scrub, dev->od_uuid, 0);
 476
 477         if (flags & SS_AUTO_FULL) {
 478                 scrub->os_full_speed = 1;
 479                 scrub->os_partial_scan = 0;
 480                 sf->sf_flags |= SF_AUTO;
 481         } else if (flags & SS_AUTO_PARTIAL) {
 482                 scrub->os_full_speed = 0;
 483                 scrub->os_partial_scan = 1;
 484                 sf->sf_flags |= SF_AUTO;
 485         } else if (sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT |
 486                                    SF_UPGRADE)) {
 487                 scrub->os_full_speed = 1;
 488                 scrub->os_partial_scan = 0;
 489         } else {
 490                 scrub->os_full_speed = 0;
 491                 scrub->os_partial_scan = 0;
 492         }
 493
 494         spin_lock(&scrub->os_lock);
 495         scrub->os_in_prior = 0;
 496         scrub->os_waiting = 0;
 497         scrub->os_paused = 0;
 498         scrub->os_in_join = 0;
 499         scrub->os_full_scrub = 0;
 500         spin_unlock(&scrub->os_lock);
 501         scrub->os_new_checked = 0;
 502         if (drop_dryrun && sf->sf_pos_first_inconsistent != 0)
 503                 sf->sf_pos_latest_start = sf->sf_pos_first_inconsistent;
 504         else if (sf->sf_pos_last_checkpoint != 0)
 505                 sf->sf_pos_latest_start = sf->sf_pos_last_checkpoint + 1;
 506         else
 507                 sf->sf_pos_latest_start = LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
 508
 509         scrub->os_pos_current = sf->sf_pos_latest_start;
 510         sf->sf_status = SS_SCANNING;
 511         sf->sf_time_latest_start = ktime_get_real_seconds();
 512         sf->sf_time_last_checkpoint = sf->sf_time_latest_start;
 513         sf->sf_pos_last_checkpoint = sf->sf_pos_latest_start - 1;
 514         rc = scrub_file_store(env, scrub);
 515         if (rc == 0) {
 516                 spin_lock(&scrub->os_lock);
 517                 thread_set_flags(thread, SVC_RUNNING);
 518                 spin_unlock(&scrub->os_lock);
 519                 wake_up_all(&thread->t_ctl_waitq);
 520         }
 521         up_write(&scrub->os_rwsem);
 522
 523         RETURN(rc);
 524 }
 525
 526 static int osd_scrub_post(const struct lu_env *env, struct osd_device *dev,
 527                           int result)
 528 {
 529         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 530         struct scrub_file *sf = &scrub->os_file;
 531         int rc;
 532         ENTRY;
 533
 534         CDEBUG(D_LFSCK, "%s: OI scrub post with result = %d\n",
 535                osd_scrub2name(scrub), result);
 536
 537         down_write(&scrub->os_rwsem);
 538         spin_lock(&scrub->os_lock);
 539         thread_set_flags(&scrub->os_thread, SVC_STOPPING);
 540         spin_unlock(&scrub->os_lock);
 541         if (scrub->os_new_checked > 0) {
 542                 sf->sf_items_checked += scrub->os_new_checked;
 543                 scrub->os_new_checked = 0;
 544                 sf->sf_pos_last_checkpoint = scrub->os_pos_current;
 545         }
 546         sf->sf_time_last_checkpoint = ktime_get_real_seconds();
 547         if (result > 0) {
 548                 dev->od_igif_inoi = 1;
 549                 dev->od_check_ff = 0;
 550                 sf->sf_status = SS_COMPLETED;
 551                 if (!(sf->sf_param & SP_DRYRUN)) {
 552                         memset(sf->sf_oi_bitmap, 0, SCRUB_OI_BITMAP_SIZE);
 553                         sf->sf_flags &= ~(SF_RECREATED | SF_INCONSISTENT |
 554                                           SF_UPGRADE | SF_AUTO);
 555                 }
 556                 sf->sf_time_last_complete = sf->sf_time_last_checkpoint;
 557                 sf->sf_success_count++;
 558         } else if (result == 0) {
 559                 if (scrub->os_paused)
 560                         sf->sf_status = SS_PAUSED;
 561                 else
 562                         sf->sf_status = SS_STOPPED;
 563         } else {
 564                 sf->sf_status = SS_FAILED;
 565         }
 566         sf->sf_run_time += ktime_get_seconds() -
 567                            scrub->os_time_last_checkpoint;
 568
 569         rc = scrub_file_store(env, scrub);
 570         up_write(&scrub->os_rwsem);
 571
 572         RETURN(rc < 0 ? rc : result);
 573 }
 574
 575 /* iteration engine */
 576
 577 typedef int (*osd_iit_next_policy)(struct osd_thread_info *info,
 578                                    struct osd_device *dev,
 579                                    struct osd_iit_param *param,
 580                                    struct osd_idmap_cache **oic,
 581                                    const bool noslot);
 582
 583 typedef int (*osd_iit_exec_policy)(struct osd_thread_info *info,
 584                                    struct osd_device *dev,
 585                                    struct osd_iit_param *param,
 586                                    struct osd_idmap_cache *oic,
 587                                    bool *noslot, int rc);
 588
 589 static int osd_iit_next(struct osd_iit_param *param, __u64 *pos)
 590 {
 591         __u32 offset;
 592
 593 again:
 594         param->offset = ldiskfs_find_next_bit(param->bitmap->b_data,
 595                         LDISKFS_INODES_PER_GROUP(param->sb), param->offset);
 596         if (param->offset >= LDISKFS_INODES_PER_GROUP(param->sb)) {
 597                 *pos = 1 + (param->bg+1) * LDISKFS_INODES_PER_GROUP(param->sb);
 598                 return SCRUB_NEXT_BREAK;
 599         }
 600
 601         offset = param->offset++;
 602         if (unlikely(*pos == param->gbase + offset && *pos != param->start)) {
 603                 /* We should NOT find the same object more than once. */
 604                 CERROR("%s: scan the same object multiple times at the pos: "
 605                        "group = %u, base = %u, offset = %u, start = %u\n",
 606                        param->sb->s_id, (__u32)param->bg, param->gbase,
 607                        offset, param->start);
 608                 goto again;
 609         }
 610
 611         *pos = param->gbase + offset;
 612         return 0;
 613 }
 614
 615 /**
 616  * \retval SCRUB_NEXT_OSTOBJ_OLD: FID-on-OST
 617  * \retval 0: FID-on-MDT
 618  */
 619 static int osd_scrub_check_local_fldb(struct osd_thread_info *info,
 620                                       struct osd_device *dev,
 621                                       struct lu_fid *fid)
 622 {
 623         /* XXX: The initial OI scrub will scan the top level /O to generate
 624          *      a small local FLDB according to the <seq>. If the given FID
 625          *      is in the local FLDB, then it is FID-on-OST; otherwise it's
 626          *      quite possible for FID-on-MDT. */
 627         if (dev->od_is_ost)
 628                 return SCRUB_NEXT_OSTOBJ_OLD;
 629
 630         return 0;
 631 }
 632
 633 static int osd_scrub_get_fid(struct osd_thread_info *info,
 634                              struct osd_device *dev, struct inode *inode,
 635                              struct lu_fid *fid, bool scrub)
 636 {
 637         struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
 638         bool has_lma = false;
 639         int rc;
 640
 641         rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
 642                          &info->oti_ost_attrs);
 643         if (rc == 0) {
 644                 has_lma = true;
 645                 if (lma->lma_compat & LMAC_NOT_IN_OI ||
 646                     lma->lma_incompat & LMAI_AGENT)
 647                         return SCRUB_NEXT_CONTINUE;
 648
 649                 *fid = lma->lma_self_fid;
 650                 if (!scrub)
 651                         return 0;
 652
 653                 if (lma->lma_compat & LMAC_FID_ON_OST)
 654                         return SCRUB_NEXT_OSTOBJ;
 655
 656                 if (fid_is_idif(fid))
 657                         return SCRUB_NEXT_OSTOBJ_OLD;
 658
 659                 /* For local object. */
 660                 if (fid_is_internal(fid))
 661                         return 0;
 662
 663                 /* For external visible MDT-object with non-normal FID. */
 664                 if (fid_is_namespace_visible(fid) && !fid_is_norm(fid))
 665                         return 0;
 666
 667                 /* For the object with normal FID, it may be MDT-object,
 668                  * or may be 2.4 OST-object, need further distinguish.
 669                  * Fall through to next section. */
 670         }
 671
 672         if (rc == -ENODATA || rc == 0) {
 673                 rc = osd_get_idif(info, inode, &info->oti_obj_dentry, fid);
 674                 if (rc == 0) {
 675                         if (scrub)
 676                                 /* It is 2.3 or older OST-object. */
 677                                 rc = SCRUB_NEXT_OSTOBJ_OLD;
 678                         return rc;
 679                 }
 680
 681                 if (rc > 0) {
 682                         if (!has_lma)
 683                                 /* It is FID-on-OST, but we do not know how
 684                                  * to generate its FID, ignore it directly. */
 685                                 rc = SCRUB_NEXT_CONTINUE;
 686                         else
 687                                 /* It is 2.4 or newer OST-object. */
 688                                 rc = SCRUB_NEXT_OSTOBJ_OLD;
 689                         return rc;
 690                 }
 691
 692                 if (rc != -ENODATA)
 693                         return rc;
 694
 695                 if (!has_lma) {
 696                         if (dev->od_scrub.os_scrub.os_convert_igif) {
 697                                 lu_igif_build(fid, inode->i_ino,
 698                                               inode->i_generation);
 699                                 if (scrub)
 700                                         rc = SCRUB_NEXT_NOLMA;
 701                                 else
 702                                         rc = 0;
 703                         } else {
 704                                 /* It may be FID-on-OST, or may be FID for
 705                                  * non-MDT0, anyway, we do not know how to
 706                                  * generate its FID, ignore it directly. */
 707                                 rc = SCRUB_NEXT_CONTINUE;
 708                         }
 709                         return rc;
 710                 }
 711
 712                 /* For OI scrub case only: the object has LMA but has no ff
 713                  * (or ff crashed). It may be MDT-object, may be OST-object
 714                  * with crashed ff. The last check is local FLDB. */
 715                 rc = osd_scrub_check_local_fldb(info, dev, fid);
 716         }
 717
 718         return rc;
 719 }
 720
 721 static int osd_iit_iget(struct osd_thread_info *info, struct osd_device *dev,
 722                         struct lu_fid *fid, struct osd_inode_id *lid, __u32 pos,
 723                         struct super_block *sb, bool scrub)
 724 {
 725         struct inode *inode;
 726         int           rc;
 727         ENTRY;
 728
 729         /* Not handle the backend root object and agent parent object.
 730          * They are neither visible to namespace nor have OI mappings. */
 731         if (unlikely(pos == osd_sb(dev)->s_root->d_inode->i_ino ||
 732                      is_remote_parent_ino(dev, pos)))
 733                 RETURN(SCRUB_NEXT_CONTINUE);
 734
 735          /* Skip project quota inode since it is greater than s_first_ino. */
 736 #ifdef HAVE_PROJECT_QUOTA
 737         if (ldiskfs_has_feature_project(sb) &&
 738             pos == le32_to_cpu(LDISKFS_SB(sb)->s_es->s_prj_quota_inum))
 739                 RETURN(SCRUB_NEXT_CONTINUE);
 740 #endif
 741
 742         osd_id_gen(lid, pos, OSD_OII_NOGEN);
 743         inode = osd_iget(info, dev, lid);
 744         if (IS_ERR(inode)) {
 745                 rc = PTR_ERR(inode);
 746                 /* The inode may be removed after bitmap searching, or the
 747                  * file is new created without inode initialized yet. */
 748                 if (rc == -ENOENT || rc == -ESTALE)
 749                         RETURN(SCRUB_NEXT_CONTINUE);
 750
 751                 CDEBUG(D_LFSCK, "%s: fail to read inode, ino# = %u: "
 752                        "rc = %d\n", osd_dev2name(dev), pos, rc);
 753                 RETURN(rc);
 754         }
 755
 756         /* It is an EA inode, no OI mapping for it, skip it. */
 757         if (osd_is_ea_inode(inode))
 758                 GOTO(put, rc = SCRUB_NEXT_CONTINUE);
 759
 760         if (scrub &&
 761             ldiskfs_test_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB)) {
 762                 /* Only skip it for the first OI scrub accessing. */
 763                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
 764                 GOTO(put, rc = SCRUB_NEXT_NOSCRUB);
 765         }
 766
 767         rc = osd_scrub_get_fid(info, dev, inode, fid, scrub);
 768
 769         GOTO(put, rc);
 770
 771 put:
 772         iput(inode);
 773         return rc;
 774 }
 775
 776 static int osd_scrub_next(struct osd_thread_info *info, struct osd_device *dev,
 777                           struct osd_iit_param *param,
 778                           struct osd_idmap_cache **oic, const bool noslot)
 779 {
 780         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 781         struct ptlrpc_thread *thread = &scrub->os_thread;
 782         struct lu_fid *fid;
 783         struct osd_inode_id *lid;
 784         int rc;
 785
 786         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_DELAY) && cfs_fail_val > 0) {
 787                 struct l_wait_info lwi;
 788
 789                 lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val), NULL, NULL);
 790                 if (likely(lwi.lwi_timeout > 0))
 791                         l_wait_event(thread->t_ctl_waitq,
 792                                 !list_empty(&scrub->os_inconsistent_items) ||
 793                                 !thread_is_running(thread),
 794                                 &lwi);
 795         }
 796
 797         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_CRASH)) {
 798                 spin_lock(&scrub->os_lock);
 799                 thread_set_flags(thread, SVC_STOPPING);
 800                 spin_unlock(&scrub->os_lock);
 801                 return SCRUB_NEXT_CRASH;
 802         }
 803
 804         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_FATAL))
 805                 return SCRUB_NEXT_FATAL;
 806
 807         if (unlikely(!thread_is_running(thread)))
 808                 return SCRUB_NEXT_EXIT;
 809
 810         if (!list_empty(&scrub->os_inconsistent_items)) {
 811                 spin_lock(&scrub->os_lock);
 812                 if (likely(!list_empty(&scrub->os_inconsistent_items))) {
 813                         struct osd_inconsistent_item *oii;
 814
 815                         oii = list_entry(scrub->os_inconsistent_items.next,
 816                                 struct osd_inconsistent_item, oii_list);
 817                         spin_unlock(&scrub->os_lock);
 818
 819                         *oic = &oii->oii_cache;
 820                         scrub->os_in_prior = 1;
 821
 822                         return 0;
 823                 }
 824                 spin_unlock(&scrub->os_lock);
 825         }
 826
 827         if (noslot)
 828                 return SCRUB_NEXT_WAIT;
 829
 830         rc = osd_iit_next(param, &scrub->os_pos_current);
 831         if (rc != 0)
 832                 return rc;
 833
 834         *oic = &dev->od_scrub.os_oic;
 835         fid = &(*oic)->oic_fid;
 836         lid = &(*oic)->oic_lid;
 837         rc = osd_iit_iget(info, dev, fid, lid,
 838                           scrub->os_pos_current, param->sb, true);
 839         return rc;
 840 }
 841
 842 static int osd_preload_next(struct osd_thread_info *info,
 843                             struct osd_device *dev, struct osd_iit_param *param,
 844                             struct osd_idmap_cache **oic, const bool noslot)
 845 {
 846         struct osd_otable_cache *ooc = &dev->od_otable_it->ooi_cache;
 847         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 848         struct ptlrpc_thread *thread = &scrub->os_thread;
 849         int rc;
 850
 851         if (thread_is_running(thread) &&
 852             ooc->ooc_pos_preload >= scrub->os_pos_current)
 853                 return SCRUB_NEXT_EXIT;
 854
 855         rc = osd_iit_next(param, &ooc->ooc_pos_preload);
 856         if (rc)
 857                 return rc;
 858
 859         rc = osd_iit_iget(info, dev,
 860                           &ooc->ooc_cache[ooc->ooc_producer_idx].oic_fid,
 861                           &ooc->ooc_cache[ooc->ooc_producer_idx].oic_lid,
 862                           ooc->ooc_pos_preload, param->sb, false);
 863         return rc;
 864 }
 865
 866 static inline int
 867 osd_scrub_wakeup(struct lustre_scrub *scrub, struct osd_otable_it *it)
 868 {
 869         spin_lock(&scrub->os_lock);
 870         if (osd_scrub_has_window(scrub, &it->ooi_cache) ||
 871             !list_empty(&scrub->os_inconsistent_items) ||
 872             it->ooi_waiting || !thread_is_running(&scrub->os_thread))
 873                 scrub->os_waiting = 0;
 874         else
 875                 scrub->os_waiting = 1;
 876         spin_unlock(&scrub->os_lock);
 877
 878         return !scrub->os_waiting;
 879 }
 880
 881 static int osd_scrub_exec(struct osd_thread_info *info, struct osd_device *dev,
 882                           struct osd_iit_param *param,
 883                           struct osd_idmap_cache *oic, bool *noslot, int rc)
 884 {
 885         struct l_wait_info lwi = { 0 };
 886         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 887         struct scrub_file *sf = &scrub->os_file;
 888         struct ptlrpc_thread *thread = &scrub->os_thread;
 889         struct osd_otable_it *it = dev->od_otable_it;
 890         struct osd_otable_cache *ooc = it ? &it->ooi_cache : NULL;
 891
 892         switch (rc) {
 893         case SCRUB_NEXT_NOSCRUB:
 894                 down_write(&scrub->os_rwsem);
 895                 scrub->os_new_checked++;
 896                 sf->sf_items_noscrub++;
 897                 up_write(&scrub->os_rwsem);
 898         case SCRUB_NEXT_CONTINUE:
 899         case SCRUB_NEXT_WAIT:
 900                 goto wait;
 901         }
 902
 903         rc = osd_scrub_check_update(info, dev, oic, rc);
 904         if (rc != 0) {
 905                 scrub->os_in_prior = 0;
 906                 return rc;
 907         }
 908
 909         rc = scrub_checkpoint(info->oti_env, scrub);
 910         if (rc) {
 911                 CDEBUG(D_LFSCK, "%s: fail to checkpoint, pos = %llu: "
 912                        "rc = %d\n", osd_scrub2name(scrub),
 913                        scrub->os_pos_current, rc);
 914                 /* Continue, as long as the scrub itself can go ahead. */
 915         }
 916
 917         if (scrub->os_in_prior) {
 918                 scrub->os_in_prior = 0;
 919                 return 0;
 920         }
 921
 922 wait:
 923         if (it != NULL && it->ooi_waiting && ooc != NULL &&
 924             ooc->ooc_pos_preload < scrub->os_pos_current) {
 925                 spin_lock(&scrub->os_lock);
 926                 it->ooi_waiting = 0;
 927                 wake_up_all(&thread->t_ctl_waitq);
 928                 spin_unlock(&scrub->os_lock);
 929         }
 930
 931         if (rc == SCRUB_NEXT_CONTINUE)
 932                 return 0;
 933
 934         if (scrub->os_full_speed || !ooc || osd_scrub_has_window(scrub, ooc)) {
 935                 *noslot = false;
 936                 return 0;
 937         }
 938
 939         if (it != NULL)
 940                 l_wait_event(thread->t_ctl_waitq, osd_scrub_wakeup(scrub, it),
 941                              &lwi);
 942
 943         if (!ooc || osd_scrub_has_window(scrub, ooc))
 944                 *noslot = false;
 945         else
 946                 *noslot = true;
 947         return 0;
 948 }
 949
 950 static int osd_preload_exec(struct osd_thread_info *info,
 951                             struct osd_device *dev, struct osd_iit_param *param,
 952                             struct osd_idmap_cache *oic, bool *noslot, int rc)
 953 {
 954         struct osd_otable_cache *ooc = &dev->od_otable_it->ooi_cache;
 955
 956         if (rc == 0) {
 957                 ooc->ooc_cached_items++;
 958                 ooc->ooc_producer_idx = (ooc->ooc_producer_idx + 1) &
 959                                         ~OSD_OTABLE_IT_CACHE_MASK;
 960         }
 961         return rc > 0 ? 0 : rc;
 962 }
 963
 964 #define SCRUB_IT_ALL    1
 965 #define SCRUB_IT_CRASH  2
 966
 967 static void osd_scrub_join(const struct lu_env *env, struct osd_device *dev,
 968                            __u32 flags, bool inconsistent)
 969 {
 970         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
 971         struct ptlrpc_thread *thread = &scrub->os_thread;
 972         struct scrub_file    *sf     = &scrub->os_file;
 973         int                   rc;
 974         ENTRY;
 975
 976         LASSERT(!(flags & SS_AUTO_PARTIAL));
 977
 978         down_write(&scrub->os_rwsem);
 979         scrub->os_in_join = 1;
 980         if (flags & SS_SET_FAILOUT)
 981                 sf->sf_param |= SP_FAILOUT;
 982         else if (flags & SS_CLEAR_FAILOUT)
 983                 sf->sf_param &= ~SP_FAILOUT;
 984
 985         if (flags & SS_SET_DRYRUN)
 986                 sf->sf_param |= SP_DRYRUN;
 987         else if (flags & SS_CLEAR_DRYRUN)
 988                 sf->sf_param &= ~SP_DRYRUN;
 989
 990         if (flags & SS_RESET) {
 991                 scrub_file_reset(scrub, dev->od_uuid,
 992                                  inconsistent ? SF_INCONSISTENT : 0);
 993                 sf->sf_status = SS_SCANNING;
 994         }
 995
 996         if (sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT | SF_UPGRADE))
 997                 scrub->os_full_speed = 1;
 998         else
 999                 scrub->os_full_speed = 0;
1000
1001         if (flags & SS_AUTO_FULL) {
1002                 sf->sf_flags |= SF_AUTO;
1003                 scrub->os_full_speed = 1;
1004         }
1005
1006         scrub->os_new_checked = 0;
1007         if (sf->sf_pos_last_checkpoint != 0)
1008                 sf->sf_pos_latest_start = sf->sf_pos_last_checkpoint + 1;
1009         else
1010                 sf->sf_pos_latest_start = LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
1011
1012         scrub->os_pos_current = sf->sf_pos_latest_start;
1013         sf->sf_time_latest_start = ktime_get_real_seconds();
1014         sf->sf_time_last_checkpoint = sf->sf_time_latest_start;
1015         sf->sf_pos_last_checkpoint = sf->sf_pos_latest_start - 1;
1016         rc = scrub_file_store(env, scrub);
1017
1018         spin_lock(&scrub->os_lock);
1019         scrub->os_waiting = 0;
1020         scrub->os_paused = 0;
1021         scrub->os_partial_scan = 0;
1022         scrub->os_in_join = 0;
1023         scrub->os_full_scrub = 0;
1024         spin_unlock(&scrub->os_lock);
1025         wake_up_all(&thread->t_ctl_waitq);
1026         up_write(&scrub->os_rwsem);
1027
1028         CDEBUG(D_LFSCK, "%s: joined in the OI scrub with flag %u: rc = %d\n",
1029                osd_scrub2name(scrub), flags, rc);
1030
1031         EXIT;
1032 }
1033
1034 static int osd_inode_iteration(struct osd_thread_info *info,
1035                                struct osd_device *dev, __u32 max, bool preload)
1036 {
1037         struct lustre_scrub *scrub  = &dev->od_scrub.os_scrub;
1038         struct ptlrpc_thread *thread = &scrub->os_thread;
1039         struct scrub_file *sf = &scrub->os_file;
1040         osd_iit_next_policy next;
1041         osd_iit_exec_policy exec;
1042         __u64 *pos;
1043         __u64 *count;
1044         struct osd_iit_param *param;
1045         struct l_wait_info lwi = { 0 };
1046         __u32 limit;
1047         int rc;
1048         bool noslot = true;
1049         ENTRY;
1050
1051         if (preload)
1052                 goto full;
1053
1054         param = &dev->od_scrub.os_iit_param;
1055         memset(param, 0, sizeof(*param));
1056         param->sb = osd_sb(dev);
1057
1058         while (scrub->os_partial_scan && !scrub->os_in_join) {
1059                 struct osd_idmap_cache *oic = NULL;
1060
1061                 rc = osd_scrub_next(info, dev, param, &oic, noslot);
1062                 switch (rc) {
1063                 case SCRUB_NEXT_EXIT:
1064                         RETURN(0);
1065                 case SCRUB_NEXT_CRASH:
1066                         RETURN(SCRUB_IT_CRASH);
1067                 case SCRUB_NEXT_FATAL:
1068                         RETURN(-EINVAL);
1069                 case SCRUB_NEXT_WAIT: {
1070                         struct kstatfs *ksfs = &info->oti_ksfs;
1071                         __u64 saved_flags;
1072
1073                         if (dev->od_full_scrub_ratio == OFSR_NEVER ||
1074                             unlikely(sf->sf_items_updated_prior == 0))
1075                                 goto wait;
1076
1077                         if (dev->od_full_scrub_ratio == OFSR_DIRECTLY ||
1078                             scrub->os_full_scrub) {
1079                                 osd_scrub_join(info->oti_env, dev,
1080                                                SS_AUTO_FULL | SS_RESET, true);
1081                                 goto full;
1082                         }
1083
1084                         rc = param->sb->s_op->statfs(param->sb->s_root, ksfs);
1085                         if (rc == 0) {
1086                                 __u64 used = ksfs->f_files - ksfs->f_ffree;
1087
1088                                 do_div(used, sf->sf_items_updated_prior);
1089                                 /* If we hit too much inconsistent OI
1090                                  * mappings during the partial scan,
1091                                  * then scan the device completely. */
1092                                 if (used < dev->od_full_scrub_ratio) {
1093                                         osd_scrub_join(info->oti_env, dev,
1094                                                 SS_AUTO_FULL | SS_RESET, true);
1095                                         goto full;
1096                                 }
1097                         }
1098
1099 wait:
1100                         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_DELAY) &&
1101                             cfs_fail_val > 0)
1102                                 continue;
1103
1104                         saved_flags = sf->sf_flags;
1105                         sf->sf_flags &= ~(SF_RECREATED | SF_INCONSISTENT |
1106                                           SF_UPGRADE | SF_AUTO);
1107                         sf->sf_status = SS_COMPLETED;
1108                         l_wait_event(thread->t_ctl_waitq,
1109                                      !thread_is_running(thread) ||
1110                                      !scrub->os_partial_scan ||
1111                                      scrub->os_in_join ||
1112                                      !list_empty(&scrub->os_inconsistent_items),
1113                                      &lwi);
1114                         sf->sf_flags = saved_flags;
1115                         sf->sf_status = SS_SCANNING;
1116
1117                         if (unlikely(!thread_is_running(thread)))
1118                                 RETURN(0);
1119
1120                         if (!scrub->os_partial_scan || scrub->os_in_join)
1121                                 goto full;
1122
1123                         continue;
1124                 }
1125                 default:
1126                         LASSERTF(rc == 0, "rc = %d\n", rc);
1127
1128                         osd_scrub_exec(info, dev, param, oic, &noslot, rc);
1129                         break;
1130                 }
1131         }
1132
1133 full:
1134         if (!preload) {
1135                 l_wait_event(thread->t_ctl_waitq,
1136                              !thread_is_running(thread) || !scrub->os_in_join,
1137                              &lwi);
1138
1139                 if (unlikely(!thread_is_running(thread)))
1140                         RETURN(0);
1141         }
1142
1143         noslot = false;
1144         if (!preload) {
1145                 next = osd_scrub_next;
1146                 exec = osd_scrub_exec;
1147                 pos = &scrub->os_pos_current;
1148                 count = &scrub->os_new_checked;
1149                 param->start = *pos;
1150                 param->bg = (*pos - 1) / LDISKFS_INODES_PER_GROUP(param->sb);
1151                 param->offset =
1152                         (*pos - 1) % LDISKFS_INODES_PER_GROUP(param->sb);
1153                 param->gbase =
1154                         1 + param->bg * LDISKFS_INODES_PER_GROUP(param->sb);
1155         } else {
1156                 struct osd_otable_cache *ooc = &dev->od_otable_it->ooi_cache;
1157
1158                 next = osd_preload_next;
1159                 exec = osd_preload_exec;
1160                 pos = &ooc->ooc_pos_preload;
1161                 count = &ooc->ooc_cached_items;
1162                 param = &dev->od_otable_it->ooi_iit_param;
1163         }
1164
1165         rc = 0;
1166         limit = le32_to_cpu(LDISKFS_SB(osd_sb(dev))->s_es->s_inodes_count);
1167         while (*pos <= limit && *count < max) {
1168                 struct ldiskfs_group_desc *desc;
1169                 bool next_group = false;
1170
1171                 desc = ldiskfs_get_group_desc(param->sb, param->bg, NULL);
1172                 if (!desc)
1173                         RETURN(-EIO);
1174
1175                 if (desc->bg_flags & cpu_to_le16(LDISKFS_BG_INODE_UNINIT)) {
1176                         next_group = true;
1177                         goto next_group;
1178                 }
1179
1180                 param->bitmap = ldiskfs_read_inode_bitmap(param->sb, param->bg);
1181                 if (!param->bitmap) {
1182                         CERROR("%s: fail to read bitmap for %u, "
1183                                "scrub will stop, urgent mode\n",
1184                                osd_scrub2name(scrub), (__u32)param->bg);
1185                         RETURN(-EIO);
1186                 }
1187
1188                 do {
1189                         struct osd_idmap_cache *oic = NULL;
1190
1191                         if (param->offset +
1192                                 ldiskfs_itable_unused_count(param->sb, desc) >=
1193                             LDISKFS_INODES_PER_GROUP(param->sb)) {
1194                                 next_group = true;
1195                                 goto next_group;
1196                         }
1197
1198                         rc = next(info, dev, param, &oic, noslot);
1199                         switch (rc) {
1200                         case SCRUB_NEXT_BREAK:
1201                                 next_group = true;
1202                                 goto next_group;
1203                         case SCRUB_NEXT_EXIT:
1204                                 brelse(param->bitmap);
1205                                 RETURN(0);
1206                         case SCRUB_NEXT_CRASH:
1207                                 brelse(param->bitmap);
1208                                 RETURN(SCRUB_IT_CRASH);
1209                         case SCRUB_NEXT_FATAL:
1210                                 brelse(param->bitmap);
1211                                 RETURN(-EINVAL);
1212                         }
1213
1214                         rc = exec(info, dev, param, oic, &noslot, rc);
1215                 } while (!rc && *pos <= limit && *count < max);
1216
1217 next_group:
1218                 if (param->bitmap) {
1219                         brelse(param->bitmap);
1220                         param->bitmap = NULL;
1221                 }
1222
1223                 if (rc < 0)
1224                         GOTO(out, rc);
1225
1226                 if (next_group) {
1227                         param->bg++;
1228                         param->offset = 0;
1229                         param->gbase = 1 +
1230                                 param->bg * LDISKFS_INODES_PER_GROUP(param->sb);
1231                         *pos = param->gbase;
1232                         param->start = *pos;
1233                 }
1234         }
1235
1236         if (*pos > limit)
1237                 RETURN(SCRUB_IT_ALL);
1238
1239 out:
1240         RETURN(rc);
1241 }
1242
1243 static int osd_otable_it_preload(const struct lu_env *env,
1244                                  struct osd_otable_it *it)
1245 {
1246         struct osd_device *dev = it->ooi_dev;
1247         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
1248         struct osd_otable_cache *ooc   = &it->ooi_cache;
1249         int                      rc;
1250         ENTRY;
1251
1252         rc = osd_inode_iteration(osd_oti_get(env), dev,
1253                                  OSD_OTABLE_IT_CACHE_SIZE, true);
1254         if (rc == SCRUB_IT_ALL)
1255                 it->ooi_all_cached = 1;
1256
1257         if (scrub->os_waiting && osd_scrub_has_window(scrub, ooc)) {
1258                 spin_lock(&scrub->os_lock);
1259                 scrub->os_waiting = 0;
1260                 wake_up_all(&scrub->os_thread.t_ctl_waitq);
1261                 spin_unlock(&scrub->os_lock);
1262         }
1263
1264         RETURN(rc < 0 ? rc : ooc->ooc_cached_items);
1265 }
1266
1267 static int osd_scrub_main(void *args)
1268 {
1269         struct lu_env env;
1270         struct osd_device *dev = (struct osd_device *)args;
1271         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
1272         struct ptlrpc_thread *thread = &scrub->os_thread;
1273         int rc;
1274         ENTRY;
1275
1276         rc = lu_env_init(&env, LCT_LOCAL | LCT_DT_THREAD);
1277         if (rc != 0) {
1278                 CDEBUG(D_LFSCK, "%s: OI scrub fail to init env: rc = %d\n",
1279                        osd_scrub2name(scrub), rc);
1280                 GOTO(noenv, rc);
1281         }
1282
1283         rc = osd_scrub_prep(&env, dev);
1284         if (rc != 0) {
1285                 CDEBUG(D_LFSCK, "%s: OI scrub fail to scrub prep: rc = %d\n",
1286                        osd_scrub2name(scrub), rc);
1287                 GOTO(out, rc);
1288         }
1289
1290         if (!scrub->os_full_speed && !scrub->os_partial_scan) {
1291                 struct l_wait_info lwi = { 0 };
1292                 struct osd_otable_it *it = dev->od_otable_it;
1293                 struct osd_otable_cache *ooc = &it->ooi_cache;
1294
1295                 l_wait_event(thread->t_ctl_waitq,
1296                              it->ooi_user_ready || !thread_is_running(thread),
1297                              &lwi);
1298                 if (unlikely(!thread_is_running(thread)))
1299                         GOTO(post, rc = 0);
1300
1301                 scrub->os_pos_current = ooc->ooc_pos_preload;
1302         }
1303
1304         CDEBUG(D_LFSCK, "%s: OI scrub start, flags = 0x%x, pos = %llu\n",
1305                osd_scrub2name(scrub), scrub->os_start_flags,
1306                scrub->os_pos_current);
1307
1308         rc = osd_inode_iteration(osd_oti_get(&env), dev, ~0U, false);
1309         if (unlikely(rc == SCRUB_IT_CRASH)) {
1310                 spin_lock(&scrub->os_lock);
1311                 thread_set_flags(&scrub->os_thread, SVC_STOPPING);
1312                 spin_unlock(&scrub->os_lock);
1313                 GOTO(out, rc = -EINVAL);
1314         }
1315
1316         GOTO(post, rc);
1317
1318 post:
1319         rc = osd_scrub_post(&env, dev, rc);
1320         CDEBUG(D_LFSCK, "%s: OI scrub: stop, pos = %llu: rc = %d\n",
1321                osd_scrub2name(scrub), scrub->os_pos_current, rc);
1322
1323 out:
1324         while (!list_empty(&scrub->os_inconsistent_items)) {
1325                 struct osd_inconsistent_item *oii;
1326
1327                 oii = list_entry(scrub->os_inconsistent_items.next,
1328                                  struct osd_inconsistent_item, oii_list);
1329                 list_del_init(&oii->oii_list);
1330                 OBD_FREE_PTR(oii);
1331         }
1332         lu_env_fini(&env);
1333
1334 noenv:
1335         spin_lock(&scrub->os_lock);
1336         thread_set_flags(thread, SVC_STOPPED);
1337         wake_up_all(&thread->t_ctl_waitq);
1338         spin_unlock(&scrub->os_lock);
1339         return rc;
1340 }
1341
1342 /* initial OI scrub */
1343
1344 typedef int (*scandir_t)(struct osd_thread_info *, struct osd_device *,
1345                          struct dentry *, filldir_t filldir);
1346
1347 #ifdef HAVE_FILLDIR_USE_CTX
1348 static int osd_ios_varfid_fill(struct dir_context *buf, const char *name,
1349                                int namelen, loff_t offset, __u64 ino,
1350                                unsigned d_type);
1351 static int osd_ios_lf_fill(struct dir_context *buf, const char *name,
1352                            int namelen, loff_t offset, __u64 ino,
1353                            unsigned d_type);
1354 static int osd_ios_dl_fill(struct dir_context *buf, const char *name,
1355                            int namelen, loff_t offset, __u64 ino,
1356                            unsigned d_type);
1357 static int osd_ios_uld_fill(struct dir_context *buf, const char *name,
1358                             int namelen, loff_t offset, __u64 ino,
1359                             unsigned d_type);
1360 #else
1361 static int osd_ios_varfid_fill(void *buf, const char *name, int namelen,
1362                                loff_t offset, __u64 ino, unsigned d_type);
1363 static int osd_ios_lf_fill(void *buf, const char *name, int namelen,
1364                            loff_t offset, __u64 ino, unsigned d_type);
1365 static int osd_ios_dl_fill(void *buf, const char *name, int namelen,
1366                            loff_t offset, __u64 ino, unsigned d_type);
1367 static int osd_ios_uld_fill(void *buf, const char *name, int namelen,
1368                             loff_t offset, __u64 ino, unsigned d_type);
1369 #endif
1370
1371 static int
1372 osd_ios_general_scan(struct osd_thread_info *info, struct osd_device *dev,
1373                      struct dentry *dentry, filldir_t filldir);
1374 static int
1375 osd_ios_ROOT_scan(struct osd_thread_info *info, struct osd_device *dev,
1376                   struct dentry *dentry, filldir_t filldir);
1377
1378 static int
1379 osd_ios_OBJECTS_scan(struct osd_thread_info *info, struct osd_device *dev,
1380                      struct dentry *dentry, filldir_t filldir);
1381
1382 struct osd_lf_map {
1383         char            *olm_name;
1384         struct lu_fid    olm_fid;
1385         __u16            olm_flags;
1386         __u16            olm_namelen;
1387         scandir_t        olm_scandir;
1388         filldir_t        olm_filldir;
1389 };
1390
1391 /* Add the new introduced local files in the list in the future. */
1392 static const struct osd_lf_map osd_lf_maps[] = {
1393         /* CATALOGS */
1394         {
1395                 .olm_name       = CATLIST,
1396                 .olm_fid        = {
1397                         .f_seq  = FID_SEQ_LOCAL_FILE,
1398                         .f_oid  = LLOG_CATALOGS_OID,
1399                 },
1400                 .olm_flags      = OLF_SHOW_NAME,
1401                 .olm_namelen    = sizeof(CATLIST) - 1,
1402         },
1403
1404         /* CONFIGS */
1405         {
1406                 .olm_name       = MOUNT_CONFIGS_DIR,
1407                 .olm_fid        = {
1408                         .f_seq  = FID_SEQ_LOCAL_FILE,
1409                         .f_oid  = MGS_CONFIGS_OID,
1410                 },
1411                 .olm_flags      = OLF_SCAN_SUBITEMS,
1412                 .olm_namelen    = sizeof(MOUNT_CONFIGS_DIR) - 1,
1413                 .olm_scandir    = osd_ios_general_scan,
1414                 .olm_filldir    = osd_ios_varfid_fill,
1415         },
1416
1417         /* NIDTBL_VERSIONS */
1418         {
1419                 .olm_name       = MGS_NIDTBL_DIR,
1420                 .olm_flags      = OLF_SCAN_SUBITEMS,
1421                 .olm_namelen    = sizeof(MGS_NIDTBL_DIR) - 1,
1422                 .olm_scandir    = osd_ios_general_scan,
1423                 .olm_filldir    = osd_ios_varfid_fill,
1424         },
1425
1426         /* PENDING */
1427         {
1428                 .olm_name       = MDT_ORPHAN_DIR,
1429                 .olm_namelen    = sizeof(MDT_ORPHAN_DIR) - 1,
1430         },
1431
1432         /* ROOT */
1433         {
1434                 .olm_name       = "ROOT",
1435                 .olm_fid        = {
1436                         .f_seq  = FID_SEQ_ROOT,
1437                         .f_oid  = FID_OID_ROOT,
1438                 },
1439                 .olm_flags      = OLF_SCAN_SUBITEMS | OLF_HIDE_FID,
1440                 .olm_namelen    = sizeof("ROOT") - 1,
1441                 .olm_scandir    = osd_ios_ROOT_scan,
1442         },
1443
1444         /* changelog_catalog */
1445         {
1446                 .olm_name       = CHANGELOG_CATALOG,
1447                 .olm_namelen    = sizeof(CHANGELOG_CATALOG) - 1,
1448         },
1449
1450         /* changelog_users */
1451         {
1452                 .olm_name       = CHANGELOG_USERS,
1453                 .olm_namelen    = sizeof(CHANGELOG_USERS) - 1,
1454         },
1455
1456         /* fld */
1457         {
1458                 .olm_name       = "fld",
1459                 .olm_fid        = {
1460                         .f_seq  = FID_SEQ_LOCAL_FILE,
1461                         .f_oid  = FLD_INDEX_OID,
1462                 },
1463                 .olm_flags      = OLF_SHOW_NAME,
1464                 .olm_namelen    = sizeof("fld") - 1,
1465         },
1466
1467         /* last_rcvd */
1468         {
1469                 .olm_name       = LAST_RCVD,
1470                 .olm_fid        = {
1471                         .f_seq  = FID_SEQ_LOCAL_FILE,
1472                         .f_oid  = LAST_RECV_OID,
1473                 },
1474                 .olm_flags      = OLF_SHOW_NAME,
1475                 .olm_namelen    = sizeof(LAST_RCVD) - 1,
1476         },
1477
1478         /* reply_data */
1479         {
1480                 .olm_name       = REPLY_DATA,
1481                 .olm_fid        = {
1482                         .f_seq  = FID_SEQ_LOCAL_FILE,
1483                         .f_oid  = REPLY_DATA_OID,
1484                 },
1485                 .olm_flags      = OLF_SHOW_NAME,
1486                 .olm_namelen    = sizeof(REPLY_DATA) - 1,
1487         },
1488
1489         /* lov_objid */
1490         {
1491                 .olm_name       = LOV_OBJID,
1492                 .olm_fid        = {
1493                         .f_seq  = FID_SEQ_LOCAL_FILE,
1494                         .f_oid  = MDD_LOV_OBJ_OID,
1495                 },
1496                 .olm_flags      = OLF_SHOW_NAME,
1497                 .olm_namelen    = sizeof(LOV_OBJID) - 1,
1498         },
1499
1500         /* lov_objseq */
1501         {
1502                 .olm_name       = LOV_OBJSEQ,
1503                 .olm_fid        = {
1504                         .f_seq  = FID_SEQ_LOCAL_FILE,
1505                         .f_oid  = MDD_LOV_OBJ_OSEQ,
1506                 },
1507                 .olm_flags      = OLF_SHOW_NAME,
1508                 .olm_namelen    = sizeof(LOV_OBJSEQ) - 1,
1509         },
1510
1511         /* quota_master */
1512         {
1513                 .olm_name       = QMT_DIR,
1514                 .olm_flags      = OLF_SCAN_SUBITEMS,
1515                 .olm_namelen    = sizeof(QMT_DIR) - 1,
1516                 .olm_scandir    = osd_ios_general_scan,
1517                 .olm_filldir    = osd_ios_varfid_fill,
1518         },
1519
1520         /* quota_slave */
1521         {
1522                 .olm_name       = QSD_DIR,
1523                 .olm_flags      = OLF_SCAN_SUBITEMS,
1524                 .olm_namelen    = sizeof(QSD_DIR) - 1,
1525                 .olm_scandir    = osd_ios_general_scan,
1526                 .olm_filldir    = osd_ios_varfid_fill,
1527         },
1528
1529         /* seq_ctl */
1530         {
1531                 .olm_name       = "seq_ctl",
1532                 .olm_fid        = {
1533                         .f_seq  = FID_SEQ_LOCAL_FILE,
1534                         .f_oid  = FID_SEQ_CTL_OID,
1535                 },
1536                 .olm_flags      = OLF_SHOW_NAME,
1537                 .olm_namelen    = sizeof("seq_ctl") - 1,
1538         },
1539
1540         /* seq_srv */
1541         {
1542                 .olm_name       = "seq_srv",
1543                 .olm_fid        = {
1544                         .f_seq  = FID_SEQ_LOCAL_FILE,
1545                         .f_oid  = FID_SEQ_SRV_OID,
1546                 },
1547                 .olm_flags      = OLF_SHOW_NAME,
1548                 .olm_namelen    = sizeof("seq_srv") - 1,
1549         },
1550
1551         /* health_check */
1552         {
1553                 .olm_name       = HEALTH_CHECK,
1554                 .olm_fid        = {
1555                         .f_seq  = FID_SEQ_LOCAL_FILE,
1556                         .f_oid  = OFD_HEALTH_CHECK_OID,
1557                 },
1558                 .olm_flags      = OLF_SHOW_NAME,
1559                 .olm_namelen    = sizeof(HEALTH_CHECK) - 1,
1560         },
1561
1562         /* LFSCK */
1563         {
1564                 .olm_name       = LFSCK_DIR,
1565                 .olm_flags      = OLF_SCAN_SUBITEMS,
1566                 .olm_namelen    = sizeof(LFSCK_DIR) - 1,
1567                 .olm_scandir    = osd_ios_general_scan,
1568                 .olm_filldir    = osd_ios_varfid_fill,
1569         },
1570
1571         /* lfsck_bookmark */
1572         {
1573                 .olm_name       = LFSCK_BOOKMARK,
1574                 .olm_namelen    = sizeof(LFSCK_BOOKMARK) - 1,
1575         },
1576
1577         /* lfsck_layout */
1578         {
1579                 .olm_name       = LFSCK_LAYOUT,
1580                 .olm_namelen    = sizeof(LFSCK_LAYOUT) - 1,
1581         },
1582
1583         /* lfsck_namespace */
1584         {
1585                 .olm_name       = LFSCK_NAMESPACE,
1586                 .olm_namelen    = sizeof(LFSCK_NAMESPACE) - 1,
1587         },
1588
1589         /* OBJECTS, upgrade from old device */
1590         {
1591                 .olm_name       = OBJECTS,
1592                 .olm_flags      = OLF_SCAN_SUBITEMS,
1593                 .olm_namelen    = sizeof(OBJECTS) - 1,
1594                 .olm_scandir    = osd_ios_OBJECTS_scan,
1595         },
1596
1597         /* lquota_v2.user, upgrade from old device */
1598         {
1599                 .olm_name       = "lquota_v2.user",
1600                 .olm_namelen    = sizeof("lquota_v2.user") - 1,
1601         },
1602
1603         /* lquota_v2.group, upgrade from old device */
1604         {
1605                 .olm_name       = "lquota_v2.group",
1606                 .olm_namelen    = sizeof("lquota_v2.group") - 1,
1607         },
1608
1609         /* LAST_GROUP, upgrade from old device */
1610         {
1611                 .olm_name       = "LAST_GROUP",
1612                 .olm_fid        = {
1613                         .f_seq  = FID_SEQ_LOCAL_FILE,
1614                         .f_oid  = OFD_LAST_GROUP_OID,
1615                 },
1616                 .olm_flags      = OLF_SHOW_NAME,
1617                 .olm_namelen    = sizeof("LAST_GROUP") - 1,
1618         },
1619
1620         /* committed batchid for cross-MDT operation */
1621         {
1622                 .olm_name       = "BATCHID",
1623                 .olm_fid        = {
1624                         .f_seq  = FID_SEQ_LOCAL_FILE,
1625                         .f_oid  = BATCHID_COMMITTED_OID,
1626                 },
1627                 .olm_flags      = OLF_SHOW_NAME,
1628                 .olm_namelen    = sizeof("BATCHID") - 1,
1629         },
1630
1631         /* OSP update logs update_log{_dir} use f_seq = FID_SEQ_UPDATE_LOG{_DIR}
1632          * and f_oid = index for their log files.  See lu_update_log{_dir}_fid()
1633          * for more details. */
1634
1635         /* update_log */
1636         {
1637                 .olm_name       = "update_log",
1638                 .olm_fid        = {
1639                         .f_seq  = FID_SEQ_UPDATE_LOG,
1640                 },
1641                 .olm_flags      = OLF_SHOW_NAME | OLF_IDX_IN_FID,
1642                 .olm_namelen    = sizeof("update_log") - 1,
1643         },
1644
1645         /* update_log_dir */
1646         {
1647                 .olm_name       = "update_log_dir",
1648                 .olm_fid        = {
1649                         .f_seq  = FID_SEQ_UPDATE_LOG_DIR,
1650                 },
1651                 .olm_flags      = OLF_SHOW_NAME | OLF_SCAN_SUBITEMS |
1652                                   OLF_IDX_IN_FID,
1653                 .olm_namelen    = sizeof("update_log_dir") - 1,
1654                 .olm_scandir    = osd_ios_general_scan,
1655                 .olm_filldir    = osd_ios_uld_fill,
1656         },
1657
1658         /* lost+found */
1659         {
1660                 .olm_name       = "lost+found",
1661                 .olm_fid        = {
1662                         .f_seq  = FID_SEQ_LOCAL_FILE,
1663                         .f_oid  = OSD_LPF_OID,
1664                 },
1665                 .olm_flags      = OLF_SCAN_SUBITEMS,
1666                 .olm_namelen    = sizeof("lost+found") - 1,
1667                 .olm_scandir    = osd_ios_general_scan,
1668                 .olm_filldir    = osd_ios_lf_fill,
1669         },
1670
1671         /* hsm_actions */
1672         {
1673                 .olm_name       = HSM_ACTIONS,
1674         },
1675
1676         /* nodemap */
1677         {
1678                 .olm_name       = LUSTRE_NODEMAP_NAME,
1679         },
1680
1681         /* index_backup */
1682         {
1683                 .olm_name       = INDEX_BACKUP_DIR,
1684                 .olm_fid        = {
1685                         .f_seq  = FID_SEQ_LOCAL_FILE,
1686                         .f_oid  = INDEX_BACKUP_OID,
1687                 },
1688                 .olm_flags      = OLF_SCAN_SUBITEMS | OLF_NOT_BACKUP,
1689                 .olm_namelen    = sizeof(INDEX_BACKUP_DIR) - 1,
1690                 .olm_scandir    = osd_ios_general_scan,
1691                 .olm_filldir    = osd_ios_varfid_fill,
1692         },
1693
1694         {
1695                 .olm_name       = NULL
1696         }
1697 };
1698
1699 /* Add the new introduced files under .lustre/ in the list in the future. */
1700 static const struct osd_lf_map osd_dl_maps[] = {
1701         /* .lustre/fid */
1702         {
1703                 .olm_name       = "fid",
1704                 .olm_fid        = {
1705                         .f_seq  = FID_SEQ_DOT_LUSTRE,
1706                         .f_oid  = FID_OID_DOT_LUSTRE_OBF,
1707                 },
1708                 .olm_namelen    = sizeof("fid") - 1,
1709         },
1710
1711         /* .lustre/lost+found */
1712         {
1713                 .olm_name       = "lost+found",
1714                 .olm_fid        = {
1715                         .f_seq  = FID_SEQ_DOT_LUSTRE,
1716                         .f_oid  = FID_OID_DOT_LUSTRE_LPF,
1717                 },
1718                 .olm_namelen    = sizeof("lost+found") - 1,
1719         },
1720
1721         {
1722                 .olm_name       = NULL
1723         }
1724 };
1725
1726 struct osd_ios_item {
1727         struct list_head oii_list;
1728         struct dentry   *oii_dentry;
1729         scandir_t        oii_scandir;
1730         filldir_t        oii_filldir;
1731 };
1732
1733 struct osd_ios_filldir_buf {
1734 #ifdef HAVE_DIR_CONTEXT
1735         /* please keep it as first member */
1736         struct dir_context       ctx;
1737 #endif
1738         struct osd_thread_info  *oifb_info;
1739         struct osd_device       *oifb_dev;
1740         struct dentry           *oifb_dentry;
1741         int                      oifb_items;
1742 };
1743
1744 static int
1745 osd_ios_new_item(struct osd_device *dev, struct dentry *dentry,
1746                  scandir_t scandir, filldir_t filldir)
1747 {
1748         struct osd_ios_item *item;
1749         ENTRY;
1750
1751         OBD_ALLOC_PTR(item);
1752         if (item == NULL)
1753                 RETURN(-ENOMEM);
1754
1755         INIT_LIST_HEAD(&item->oii_list);
1756         item->oii_dentry = dget(dentry);
1757         item->oii_scandir = scandir;
1758         item->oii_filldir = filldir;
1759         list_add_tail(&item->oii_list, &dev->od_ios_list);
1760
1761         RETURN(0);
1762 }
1763
1764 static bool osd_index_need_recreate(const struct lu_env *env,
1765                                     struct osd_device *dev, struct inode *inode)
1766 {
1767         struct osd_directory *iam = &osd_oti_get(env)->oti_iam;
1768         struct iam_container *bag = &iam->od_container;
1769         int rc;
1770         ENTRY;
1771
1772         rc = iam_container_init(bag, &iam->od_descr, inode);
1773         if (rc)
1774                 RETURN(true);
1775
1776         rc = iam_container_setup(bag);
1777         iam_container_fini(bag);
1778         if (rc)
1779                 RETURN(true);
1780
1781         RETURN(false);
1782 }
1783
1784 static void osd_ios_index_register(const struct lu_env *env,
1785                                    struct osd_device *osd,
1786                                    const struct lu_fid *fid,
1787                                    struct inode *inode)
1788 {
1789         struct osd_directory *iam = &osd_oti_get(env)->oti_iam;
1790         struct iam_container *bag = &iam->od_container;
1791         struct super_block *sb = osd_sb(osd);
1792         struct iam_descr *descr;
1793         __u32 keysize = 0;
1794         __u32 recsize = 0;
1795         int rc;
1796         ENTRY;
1797
1798         /* Index must be a regular file. */
1799         if (!S_ISREG(inode->i_mode))
1800                 RETURN_EXIT;
1801
1802         /* Index's size must be block aligned. */
1803         if (inode->i_size < sb->s_blocksize ||
1804             (inode->i_size & (sb->s_blocksize - 1)) != 0)
1805                 RETURN_EXIT;
1806
1807         iam_container_init(bag, &iam->od_descr, inode);
1808         rc = iam_container_setup(bag);
1809         if (rc)
1810                 GOTO(fini, rc = 1);
1811
1812         descr = bag->ic_descr;
1813         /* May be regular file with IAM_LFIX_ROOT_MAGIC matched
1814          * coincidentally, or corrupted index object, skip it. */
1815         if (descr->id_ptr_size != 4)
1816                 GOTO(fini, rc = 1);
1817
1818         keysize = descr->id_key_size;
1819         recsize = descr->id_rec_size;
1820         rc = osd_index_register(osd, fid, keysize, recsize);
1821
1822         GOTO(fini, rc);
1823
1824 fini:
1825         iam_container_fini(bag);
1826         if (!rc)
1827                 CDEBUG(D_LFSCK, "%s: index object "DFID" (%u/%u) registered\n",
1828                        osd_name(osd), PFID(fid), keysize, recsize);
1829 }
1830
1831 static void osd_index_restore(const struct lu_env *env, struct osd_device *dev,
1832                               struct lustre_index_restore_unit *liru,
1833                               void *buf, int bufsize)
1834 {
1835         struct osd_thread_info *info = osd_oti_get(env);
1836         struct osd_inode_id *id = &info->oti_id;
1837         struct lu_fid *tgt_fid = &liru->liru_cfid;
1838         struct inode *bak_inode = NULL;
1839         struct ldiskfs_dir_entry_2 *de = NULL;
1840         struct buffer_head *bh = NULL;
1841         struct dentry *dentry;
1842         char *name = buf;
1843         struct lu_fid bak_fid;
1844         int rc;
1845         ENTRY;
1846
1847         lustre_fid2lbx(name, tgt_fid, bufsize);
1848         dentry = osd_child_dentry_by_inode(env, dev->od_index_backup_inode,
1849                                            name, strlen(name));
1850         bh = osd_ldiskfs_find_entry(dev->od_index_backup_inode,
1851                                     &dentry->d_name, &de, NULL, NULL);
1852         if (IS_ERR(bh))
1853                 GOTO(log, rc = PTR_ERR(bh));
1854
1855         osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
1856         brelse(bh);
1857         bak_inode = osd_iget_fid(info, dev, id, &bak_fid);
1858         if (IS_ERR(bak_inode))
1859                 GOTO(log, rc = PTR_ERR(bak_inode));
1860
1861         iput(bak_inode);
1862         /* The OI mapping for index may be invalid, since it will be
1863          * re-created, not update the OI mapping, just cache it in RAM. */
1864         osd_id_gen(id, liru->liru_clid, OSD_OII_NOGEN);
1865         osd_add_oi_cache(info, dev, id, tgt_fid);
1866         rc = lustre_index_restore(env, &dev->od_dt_dev, &liru->liru_pfid,
1867                                   tgt_fid, &bak_fid, liru->liru_name,
1868                                   &dev->od_index_backup_list, &dev->od_lock,
1869                                   buf, bufsize);
1870         GOTO(log, rc);
1871
1872 log:
1873         CDEBUG(D_WARNING, "%s: restore index '%s' with "DFID": rc = %d\n",
1874                osd_name(dev), liru->liru_name, PFID(tgt_fid), rc);
1875 }
1876
1877 /**
1878  * osd_ios_scan_one() - check/fix LMA FID and OI entry for one inode
1879  *
1880  * The passed \a inode's \a fid is verified against the LMA FID. If the \a fid
1881  * is NULL or is empty the IGIF FID is used. The FID is verified in the OI to
1882  * reference the inode, or fixed if it is missing or references another inode.
1883  */
1884 static int
1885 osd_ios_scan_one(struct osd_thread_info *info, struct osd_device *dev,
1886                  struct inode *parent, struct inode *inode,
1887                  const struct lu_fid *fid, const char *name,
1888                  int namelen, int flags)
1889 {
1890         struct lustre_mdt_attrs *lma    = &info->oti_ost_attrs.loa_lma;
1891         struct osd_inode_id     *id     = &info->oti_id;
1892         struct osd_inode_id     *id2    = &info->oti_id2;
1893         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
1894         struct scrub_file       *sf     = &scrub->os_file;
1895         struct lu_fid            tfid;
1896         int                      rc;
1897         ENTRY;
1898
1899         if (!inode) {
1900                 CDEBUG(D_INODE, "%s: child '%.*s' lacks inode: rc = -2\n",
1901                        osd_name(dev), namelen, name);
1902                 RETURN(-ENOENT);
1903         }
1904
1905         rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
1906                          &info->oti_ost_attrs);
1907         if (rc != 0 && rc != -ENODATA) {
1908                 CDEBUG(D_LFSCK, "%s: fail to get lma for init OI scrub: "
1909                        "rc = %d\n", osd_name(dev), rc);
1910
1911                 RETURN(rc);
1912         }
1913
1914         osd_id_gen(id, inode->i_ino, inode->i_generation);
1915         if (rc == -ENODATA) {
1916                 if (fid == NULL || fid_is_zero(fid) || flags & OLF_HIDE_FID) {
1917                         lu_igif_build(&tfid, inode->i_ino, inode->i_generation);
1918                 } else {
1919                         tfid = *fid;
1920                         if (flags & OLF_IDX_IN_FID) {
1921                                 LASSERT(dev->od_index >= 0);
1922
1923                                 tfid.f_oid = dev->od_index;
1924                         }
1925                 }
1926                 rc = osd_ea_fid_set(info, inode, &tfid, 0, 0);
1927                 if (rc != 0) {
1928                         CDEBUG(D_LFSCK, "%s: fail to set LMA for init OI "
1929                               "scrub: rc = %d\n", osd_name(dev), rc);
1930
1931                         RETURN(rc);
1932                 }
1933         } else {
1934                 if (lma->lma_compat & LMAC_NOT_IN_OI)
1935                         RETURN(0);
1936
1937                 tfid = lma->lma_self_fid;
1938                 if (lma->lma_compat & LMAC_IDX_BACKUP &&
1939                     osd_index_need_recreate(info->oti_env, dev, inode)) {
1940                         struct lu_fid *pfid = &info->oti_fid3;
1941
1942                         if (parent == osd_sb(dev)->s_root->d_inode) {
1943                                 lu_local_obj_fid(pfid, OSD_FS_ROOT_OID);
1944                         } else {
1945                                 rc = osd_scrub_get_fid(info, dev, parent, pfid,
1946                                                        false);
1947                                 if (rc)
1948                                         RETURN(rc);
1949                         }
1950
1951                         rc = lustre_liru_new(&dev->od_index_restore_list, pfid,
1952                                         &tfid, inode->i_ino, name, namelen);
1953
1954                         RETURN(rc);
1955                 }
1956
1957                 if (!(flags & OLF_NOT_BACKUP))
1958                         osd_ios_index_register(info->oti_env, dev, &tfid,
1959                                                inode);
1960         }
1961
1962         rc = osd_oi_lookup(info, dev, &tfid, id2, 0);
1963         if (rc != 0) {
1964                 if (rc != -ENOENT)
1965                         RETURN(rc);
1966
1967                 rc = osd_scrub_refresh_mapping(info, dev, &tfid, id,
1968                                                DTO_INDEX_INSERT, true, 0, NULL);
1969                 if (rc > 0)
1970                         rc = 0;
1971
1972                 RETURN(rc);
1973         }
1974
1975         if (osd_id_eq_strict(id, id2))
1976                 RETURN(0);
1977
1978         if (!(sf->sf_flags & SF_INCONSISTENT)) {
1979                 scrub_file_reset(scrub, dev->od_uuid, SF_INCONSISTENT);
1980                 rc = scrub_file_store(info->oti_env, scrub);
1981                 if (rc != 0)
1982                         RETURN(rc);
1983         }
1984
1985         rc = osd_scrub_refresh_mapping(info, dev, &tfid, id,
1986                                        DTO_INDEX_UPDATE, true, 0, NULL);
1987         if (rc > 0)
1988                 rc = 0;
1989
1990         RETURN(rc);
1991 }
1992
1993 /**
1994  * It scans the /lost+found, and for the OST-object (with filter_fid
1995  * or filter_fid_18_23), move them back to its proper /O/<seq>/d<x>.
1996  */
1997 #ifdef HAVE_FILLDIR_USE_CTX
1998 static int osd_ios_lf_fill(struct dir_context *buf,
1999 #else
2000 static int osd_ios_lf_fill(void *buf,
2001 #endif
2002                            const char *name, int namelen,
2003                            loff_t offset, __u64 ino, unsigned d_type)
2004 {
2005         struct osd_ios_filldir_buf *fill_buf =
2006                 (struct osd_ios_filldir_buf *)buf;
2007         struct osd_thread_info     *info     = fill_buf->oifb_info;
2008         struct osd_device          *dev      = fill_buf->oifb_dev;
2009         struct lu_fid              *fid      = &info->oti_fid;
2010         struct osd_scrub           *scrub    = &dev->od_scrub;
2011         struct dentry              *parent   = fill_buf->oifb_dentry;
2012         struct dentry              *child;
2013         struct inode               *dir      = parent->d_inode;
2014         struct inode               *inode;
2015         int                         rc;
2016         ENTRY;
2017
2018         fill_buf->oifb_items++;
2019
2020         /* skip any '.' started names */
2021         if (name[0] == '.')
2022                 RETURN(0);
2023
2024         scrub->os_lf_scanned++;
2025         child = osd_ios_lookup_one_len(name, parent, namelen);
2026         if (IS_ERR(child)) {
2027                 CDEBUG(D_LFSCK, "%s: cannot lookup child '%.*s': rc = %d\n",
2028                       osd_name(dev), namelen, name, (int)PTR_ERR(child));
2029                 RETURN(0);
2030         } else if (!child->d_inode) {
2031                 dput(child);
2032                 CDEBUG(D_INODE, "%s: child '%.*s' lacks inode\n",
2033                        osd_name(dev), namelen, name);
2034                 RETURN(0);
2035         }
2036
2037         inode = child->d_inode;
2038         if (S_ISDIR(inode->i_mode)) {
2039                 rc = osd_ios_new_item(dev, child, osd_ios_general_scan,
2040                                       osd_ios_lf_fill);
2041                 if (rc != 0)
2042                         CDEBUG(D_LFSCK, "%s: cannot add child '%.*s': "
2043                               "rc = %d\n", osd_name(dev), namelen, name, rc);
2044                 GOTO(put, rc);
2045         }
2046
2047         if (!S_ISREG(inode->i_mode))
2048                 GOTO(put, rc = 0);
2049
2050         rc = osd_scrub_get_fid(info, dev, inode, fid, true);
2051         if (rc == SCRUB_NEXT_OSTOBJ || rc == SCRUB_NEXT_OSTOBJ_OLD) {
2052                 rc = osd_obj_map_recover(info, dev, dir, child, fid);
2053                 if (rc == 0) {
2054                         CDEBUG(D_LFSCK, "recovered '%.*s' ["DFID"] from "
2055                                "/lost+found.\n", namelen, name, PFID(fid));
2056                         scrub->os_lf_repaired++;
2057                 } else {
2058                         CDEBUG(D_LFSCK, "%s: cannot rename for '%.*s' "
2059                                DFID": rc = %d\n",
2060                                osd_name(dev), namelen, name, PFID(fid), rc);
2061                 }
2062         }
2063
2064         /* XXX: For MDT-objects, we can move them from /lost+found to namespace
2065          *      visible place, such as the /ROOT/.lustre/lost+found, then LFSCK
2066          *      can process them in furtuer. */
2067
2068         GOTO(put, rc);
2069
2070 put:
2071         if (rc < 0)
2072                 scrub->os_lf_failed++;
2073         dput(child);
2074         /* skip the failure to make the scanning to continue. */
2075         return 0;
2076 }
2077
2078 #ifdef HAVE_FILLDIR_USE_CTX
2079 static int osd_ios_varfid_fill(struct dir_context *buf,
2080 #else
2081 static int osd_ios_varfid_fill(void *buf,
2082 #endif
2083                                const char *name, int namelen,
2084                                loff_t offset, __u64 ino, unsigned d_type)
2085 {
2086         struct osd_ios_filldir_buf *fill_buf =
2087                 (struct osd_ios_filldir_buf *)buf;
2088         struct osd_device          *dev      = fill_buf->oifb_dev;
2089         struct dentry              *child;
2090         int                         rc;
2091         ENTRY;
2092
2093         fill_buf->oifb_items++;
2094
2095         /* skip any '.' started names */
2096         if (name[0] == '.')
2097                 RETURN(0);
2098
2099         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
2100         if (IS_ERR(child))
2101                 RETURN(PTR_ERR(child));
2102
2103         rc = osd_ios_scan_one(fill_buf->oifb_info, dev,
2104                               fill_buf->oifb_dentry->d_inode, child->d_inode,
2105                               NULL, name, namelen, 0);
2106         if (rc == 0 && S_ISDIR(child->d_inode->i_mode))
2107                 rc = osd_ios_new_item(dev, child, osd_ios_general_scan,
2108                                       osd_ios_varfid_fill);
2109         dput(child);
2110
2111         RETURN(rc);
2112 }
2113
2114 #ifdef HAVE_FILLDIR_USE_CTX
2115 static int osd_ios_dl_fill(struct dir_context *buf,
2116 #else
2117 static int osd_ios_dl_fill(void *buf,
2118 #endif
2119                            const char *name, int namelen,
2120                            loff_t offset, __u64 ino, unsigned d_type)
2121 {
2122         struct osd_ios_filldir_buf *fill_buf =
2123                 (struct osd_ios_filldir_buf *)buf;
2124         struct osd_device          *dev      = fill_buf->oifb_dev;
2125         const struct osd_lf_map    *map;
2126         struct dentry              *child;
2127         int                         rc       = 0;
2128         ENTRY;
2129
2130         fill_buf->oifb_items++;
2131
2132         /* skip any '.' started names */
2133         if (name[0] == '.')
2134                 RETURN(0);
2135
2136         for (map = osd_dl_maps; map->olm_name != NULL; map++) {
2137                 if (map->olm_namelen != namelen)
2138                         continue;
2139
2140                 if (strncmp(map->olm_name, name, namelen) == 0)
2141                         break;
2142         }
2143
2144         if (map->olm_name == NULL)
2145                 RETURN(0);
2146
2147         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
2148         if (IS_ERR(child))
2149                 RETURN(PTR_ERR(child));
2150
2151         rc = osd_ios_scan_one(fill_buf->oifb_info, dev,
2152                               fill_buf->oifb_dentry->d_inode, child->d_inode,
2153                               &map->olm_fid, name, namelen, map->olm_flags);
2154         dput(child);
2155
2156         RETURN(rc);
2157 }
2158
2159 #ifdef HAVE_FILLDIR_USE_CTX
2160 static int osd_ios_uld_fill(struct dir_context *buf,
2161 #else
2162 static int osd_ios_uld_fill(void *buf,
2163 #endif
2164                             const char *name, int namelen,
2165                             loff_t offset, __u64 ino, unsigned d_type)
2166 {
2167         struct osd_ios_filldir_buf *fill_buf =
2168                 (struct osd_ios_filldir_buf *)buf;
2169         struct dentry              *child;
2170         struct lu_fid               tfid;
2171         int                         rc       = 0;
2172         ENTRY;
2173
2174         fill_buf->oifb_items++;
2175
2176         /* skip any non-DFID format name */
2177         if (name[0] != '[')
2178                 RETURN(0);
2179
2180         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
2181         if (IS_ERR(child))
2182                 RETURN(PTR_ERR(child));
2183
2184         /* skip the start '[' */
2185         sscanf(&name[1], SFID, RFID(&tfid));
2186         if (fid_is_sane(&tfid))
2187                 rc = osd_ios_scan_one(fill_buf->oifb_info, fill_buf->oifb_dev,
2188                                       fill_buf->oifb_dentry->d_inode,
2189                                       child->d_inode, &tfid, name, namelen, 0);
2190         else
2191                 rc = -EIO;
2192         dput(child);
2193
2194         RETURN(rc);
2195 }
2196
2197 #ifdef HAVE_FILLDIR_USE_CTX
2198 static int osd_ios_root_fill(struct dir_context *buf,
2199 #else
2200 static int osd_ios_root_fill(void *buf,
2201 #endif
2202                              const char *name, int namelen,
2203                              loff_t offset, __u64 ino, unsigned d_type)
2204 {
2205         struct osd_ios_filldir_buf *fill_buf =
2206                 (struct osd_ios_filldir_buf *)buf;
2207         struct osd_device          *dev      = fill_buf->oifb_dev;
2208         const struct osd_lf_map    *map;
2209         struct dentry              *child;
2210         int                         rc       = 0;
2211         ENTRY;
2212
2213         fill_buf->oifb_items++;
2214
2215         /* skip any '.' started names */
2216         if (name[0] == '.')
2217                 RETURN(0);
2218
2219         for (map = osd_lf_maps; map->olm_name != NULL; map++) {
2220                 if (map->olm_namelen != namelen)
2221                         continue;
2222
2223                 if (strncmp(map->olm_name, name, namelen) == 0)
2224                         break;
2225         }
2226
2227         if (map->olm_name == NULL)
2228                 RETURN(0);
2229
2230         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
2231         if (IS_ERR(child))
2232                 RETURN(PTR_ERR(child));
2233         else if (!child->d_inode)
2234                 GOTO(out_put, rc = -ENOENT);
2235
2236         if (!(map->olm_flags & OLF_NO_OI))
2237                 rc = osd_ios_scan_one(fill_buf->oifb_info, dev,
2238                                 fill_buf->oifb_dentry->d_inode, child->d_inode,
2239                                 &map->olm_fid, name, namelen, map->olm_flags);
2240         if (rc == 0 && map->olm_flags & OLF_SCAN_SUBITEMS)
2241                 rc = osd_ios_new_item(dev, child, map->olm_scandir,
2242                                       map->olm_filldir);
2243 out_put:
2244         dput(child);
2245
2246         RETURN(rc);
2247 }
2248
2249 static int
2250 osd_ios_general_scan(struct osd_thread_info *info, struct osd_device *dev,
2251                      struct dentry *dentry, filldir_t filldir)
2252 {
2253         struct osd_ios_filldir_buf    buf   = {
2254 #ifdef HAVE_DIR_CONTEXT
2255                                                 .ctx.actor = filldir,
2256 #endif
2257                                                 .oifb_info = info,
2258                                                 .oifb_dev = dev,
2259                                                 .oifb_dentry = dentry };
2260         struct file                  *filp  = &info->oti_file;
2261         struct inode                 *inode = dentry->d_inode;
2262         const struct file_operations *fops  = inode->i_fop;
2263         int                           rc;
2264         ENTRY;
2265
2266         LASSERT(filldir != NULL);
2267
2268         filp->f_pos = 0;
2269         filp->f_path.dentry = dentry;
2270         filp->f_mode = FMODE_64BITHASH;
2271         filp->f_mapping = inode->i_mapping;
2272         filp->f_op = fops;
2273         filp->private_data = NULL;
2274         set_file_inode(filp, inode);
2275
2276         do {
2277                 buf.oifb_items = 0;
2278 #ifdef HAVE_DIR_CONTEXT
2279                 buf.ctx.pos = filp->f_pos;
2280 #ifdef HAVE_ITERATE_SHARED
2281                 rc = fops->iterate_shared(filp, &buf.ctx);
2282 #else
2283                 rc = fops->iterate(filp, &buf.ctx);
2284 #endif
2285                 filp->f_pos = buf.ctx.pos;
2286 #else
2287                 rc = fops->readdir(filp, &buf, filldir);
2288 #endif
2289         } while (rc >= 0 && buf.oifb_items > 0 &&
2290                  filp->f_pos != LDISKFS_HTREE_EOF_64BIT);
2291         fops->release(inode, filp);
2292
2293         RETURN(rc);
2294 }
2295
2296 static int
2297 osd_ios_ROOT_scan(struct osd_thread_info *info, struct osd_device *dev,
2298                   struct dentry *dentry, filldir_t filldir)
2299 {
2300         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2301         struct scrub_file *sf = &scrub->os_file;
2302         struct dentry *child;
2303         int rc;
2304         ENTRY;
2305
2306         /* It is existing MDT0 device. We only allow the case of object without
2307          * LMA to happen on the MDT0, which is usually for old 1.8 MDT. Then we
2308          * can generate IGIF mode FID for the object and related OI mapping. If
2309          * it is on other MDTs, then becuase file-level backup/restore, related
2310          * OI mapping may be invalid already, we do not know which is the right
2311          * FID for the object. We only allow IGIF objects to reside on the MDT0.
2312          *
2313          * XXX: For the case of object on non-MDT0 device with neither LMA nor
2314          *      "fid" xattr, then something crashed. We cannot re-generate the
2315          *      FID directly, instead, the OI scrub will scan the OI structure
2316          *      and try to re-generate the LMA from the OI mapping. But if the
2317          *      OI mapping crashed or lost also, then we have to give up under
2318          *      double failure cases. */
2319         scrub->os_convert_igif = 1;
2320         child = osd_ios_lookup_one_len(dot_lustre_name, dentry,
2321                                        strlen(dot_lustre_name));
2322         if (IS_ERR(child) && PTR_ERR(child) != -ENOENT) {
2323                 rc = PTR_ERR(child);
2324         } else if (IS_ERR(child) || !child->d_inode) {
2325                 /* It is 1.8 MDT device. */
2326                 if (!(sf->sf_flags & SF_UPGRADE)) {
2327                         scrub_file_reset(scrub, dev->od_uuid,
2328                                          SF_UPGRADE);
2329                         sf->sf_internal_flags &= ~SIF_NO_HANDLE_OLD_FID;
2330                         rc = scrub_file_store(info->oti_env, scrub);
2331                 } else {
2332                         rc = 0;
2333                 }
2334                 if (!IS_ERR(child))
2335                         dput(child);
2336         } else {
2337                 /* For lustre-2.x (x <= 3), the ".lustre" has NO FID-in-LMA,
2338                  * so the client will get IGIF for the ".lustre" object when
2339                  * the MDT restart.
2340                  *
2341                  * From the OI scrub view, when the MDT upgrade to Lustre-2.4,
2342                  * it does not know whether there are some old clients cached
2343                  * the ".lustre" IGIF during the upgrading. Two choices:
2344                  *
2345                  * 1) Generate IGIF-in-LMA and IGIF-in-OI for the ".lustre".
2346                  *    It will allow the old connected clients to access the
2347                  *    ".lustre" with cached IGIF. But it will cause others
2348                  *    on the MDT failed to check "fid_is_dot_lustre()".
2349                  *
2350                  * 2) Use fixed FID {FID_SEQ_DOT_LUSTRE, FID_OID_DOT_LUSTRE, 0}
2351                  *    for ".lustre" in spite of whether there are some clients
2352                  *    cached the ".lustre" IGIF or not. It enables the check
2353                  *    "fid_is_dot_lustre()" on the MDT, although it will cause
2354                  *    that the old connected clients cannot access the ".lustre"
2355                  *    with the cached IGIF.
2356                  *
2357                  * Usually, it is rare case for the old connected clients
2358                  * to access the ".lustre" with cached IGIF. So we prefer
2359                  * to the solution 2). */
2360                 rc = osd_ios_scan_one(info, dev, dentry->d_inode,
2361                                       child->d_inode, &LU_DOT_LUSTRE_FID,
2362                                       dot_lustre_name,
2363                                       strlen(dot_lustre_name), 0);
2364                 if (rc == 0)
2365                         rc = osd_ios_new_item(dev, child, osd_ios_general_scan,
2366                                               osd_ios_dl_fill);
2367                 dput(child);
2368         }
2369
2370         RETURN(rc);
2371 }
2372
2373 static int
2374 osd_ios_OBJECTS_scan(struct osd_thread_info *info, struct osd_device *dev,
2375                      struct dentry *dentry, filldir_t filldir)
2376 {
2377         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2378         struct scrub_file *sf = &scrub->os_file;
2379         struct dentry *child;
2380         int rc;
2381         ENTRY;
2382
2383         if (unlikely(sf->sf_internal_flags & SIF_NO_HANDLE_OLD_FID)) {
2384                 sf->sf_internal_flags &= ~SIF_NO_HANDLE_OLD_FID;
2385                 rc = scrub_file_store(info->oti_env, scrub);
2386                 if (rc != 0)
2387                         RETURN(rc);
2388         }
2389
2390         child = osd_ios_lookup_one_len(ADMIN_USR, dentry, strlen(ADMIN_USR));
2391         if (!IS_ERR(child)) {
2392                 rc = osd_ios_scan_one(info, dev, dentry->d_inode,
2393                                       child->d_inode, NULL, ADMIN_USR,
2394                                       strlen(ADMIN_USR), 0);
2395                 dput(child);
2396         } else {
2397                 rc = PTR_ERR(child);
2398         }
2399
2400         if (rc != 0 && rc != -ENOENT)
2401                 RETURN(rc);
2402
2403         child = osd_ios_lookup_one_len(ADMIN_GRP, dentry, strlen(ADMIN_GRP));
2404         if (!IS_ERR(child)) {
2405                 rc = osd_ios_scan_one(info, dev, dentry->d_inode,
2406                                       child->d_inode, NULL, ADMIN_GRP,
2407                                       strlen(ADMIN_GRP), 0);
2408                 dput(child);
2409         } else {
2410                 rc = PTR_ERR(child);
2411         }
2412
2413         if (rc == -ENOENT)
2414                 rc = 0;
2415
2416         RETURN(rc);
2417 }
2418
2419 static void osd_initial_OI_scrub(struct osd_thread_info *info,
2420                                  struct osd_device *dev)
2421 {
2422         struct osd_ios_item     *item    = NULL;
2423         scandir_t                scandir = osd_ios_general_scan;
2424         filldir_t                filldir = osd_ios_root_fill;
2425         struct dentry           *dentry  = osd_sb(dev)->s_root;
2426         const struct osd_lf_map *map     = osd_lf_maps;
2427         ENTRY;
2428
2429         /* Lookup IGIF in OI by force for initial OI scrub. */
2430         dev->od_igif_inoi = 1;
2431
2432         while (1) {
2433                 scandir(info, dev, dentry, filldir);
2434                 if (item != NULL) {
2435                         dput(item->oii_dentry);
2436                         OBD_FREE_PTR(item);
2437                 }
2438
2439                 if (list_empty(&dev->od_ios_list))
2440                         break;
2441
2442                 item = list_entry(dev->od_ios_list.next,
2443                                   struct osd_ios_item, oii_list);
2444                 list_del_init(&item->oii_list);
2445
2446                 LASSERT(item->oii_scandir != NULL);
2447                 scandir = item->oii_scandir;
2448                 filldir = item->oii_filldir;
2449                 dentry = item->oii_dentry;
2450         }
2451
2452         /* There maybe the case that the object has been removed, but its OI
2453          * mapping is still in the OI file, such as the "CATALOGS" after MDT
2454          * file-level backup/restore. So here cleanup the stale OI mappings. */
2455         while (map->olm_name != NULL) {
2456                 struct dentry *child;
2457
2458                 if (fid_is_zero(&map->olm_fid)) {
2459                         map++;
2460                         continue;
2461                 }
2462
2463                 child = osd_ios_lookup_one_len(map->olm_name,
2464                                                osd_sb(dev)->s_root,
2465                                                map->olm_namelen);
2466                 if (PTR_ERR(child) == -ENOENT ||
2467                     (!IS_ERR(child) && !child->d_inode))
2468                         osd_scrub_refresh_mapping(info, dev, &map->olm_fid,
2469                                                   NULL, DTO_INDEX_DELETE,
2470                                                   true, 0, NULL);
2471                 if (!IS_ERR(child))
2472                         dput(child);
2473                 map++;
2474         }
2475
2476         if (!list_empty(&dev->od_index_restore_list)) {
2477                 char *buf;
2478
2479                 OBD_ALLOC_LARGE(buf, INDEX_BACKUP_BUFSIZE);
2480                 if (!buf)
2481                         CERROR("%s: not enough RAM for rebuild index\n",
2482                                osd_name(dev));
2483
2484                 while (!list_empty(&dev->od_index_restore_list)) {
2485                         struct lustre_index_restore_unit *liru;
2486
2487                         liru = list_entry(dev->od_index_restore_list.next,
2488                                           struct lustre_index_restore_unit,
2489                                           liru_link);
2490                         list_del(&liru->liru_link);
2491                         if (buf)
2492                                 osd_index_restore(info->oti_env, dev, liru,
2493                                                   buf, INDEX_BACKUP_BUFSIZE);
2494                         OBD_FREE(liru, liru->liru_len);
2495                 }
2496
2497                 if (buf)
2498                         OBD_FREE_LARGE(buf, INDEX_BACKUP_BUFSIZE);
2499         }
2500
2501         EXIT;
2502 }
2503
2504 char *osd_lf_fid2name(const struct lu_fid *fid)
2505 {
2506         const struct osd_lf_map *map = osd_lf_maps;
2507
2508         while (map->olm_name != NULL) {
2509                 if (!lu_fid_eq(fid, &map->olm_fid)) {
2510                         map++;
2511                         continue;
2512                 }
2513
2514                 if (map->olm_flags & OLF_SHOW_NAME)
2515                         return map->olm_name;
2516                 else
2517                         return "";
2518         }
2519
2520         return NULL;
2521 }
2522
2523 /* OI scrub start/stop */
2524
2525 int osd_scrub_start(const struct lu_env *env, struct osd_device *dev,
2526                     __u32 flags)
2527 {
2528         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2529         int rc;
2530         ENTRY;
2531
2532         if (dev->od_dt_dev.dd_rdonly)
2533                 RETURN(-EROFS);
2534
2535         /* od_otable_mutex: prevent curcurrent start/stop */
2536         mutex_lock(&dev->od_otable_mutex);
2537         rc = scrub_start(osd_scrub_main, scrub, dev, flags);
2538         if (rc == -EALREADY) {
2539                 rc = 0;
2540                 if ((scrub->os_file.sf_flags & SF_AUTO ||
2541                      scrub->os_partial_scan) &&
2542                     !(flags & SS_AUTO_PARTIAL))
2543                         osd_scrub_join(env, dev, flags, false);
2544         }
2545         mutex_unlock(&dev->od_otable_mutex);
2546
2547         RETURN(rc);
2548 }
2549
2550 void osd_scrub_stop(struct osd_device *dev)
2551 {
2552         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2553
2554         /* od_otable_mutex: prevent curcurrent start/stop */
2555         mutex_lock(&dev->od_otable_mutex);
2556         scrub->os_paused = 1;
2557         scrub_stop(scrub);
2558         mutex_unlock(&dev->od_otable_mutex);
2559 }
2560
2561 /* OI scrub setup/cleanup */
2562
2563 static const char osd_scrub_name[] = "OI_scrub";
2564
2565 int osd_scrub_setup(const struct lu_env *env, struct osd_device *dev)
2566 {
2567         struct osd_thread_info *info = osd_oti_get(env);
2568         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2569         struct lvfs_run_ctxt *ctxt = &dev->od_scrub.os_ctxt;
2570         struct scrub_file *sf = &scrub->os_file;
2571         struct super_block *sb = osd_sb(dev);
2572         struct lvfs_run_ctxt saved;
2573         struct file *filp;
2574         struct inode *inode;
2575         struct lu_fid *fid = &info->oti_fid;
2576         struct osd_inode_id *id = &info->oti_id;
2577         struct dt_object *obj;
2578         bool dirty = false;
2579         bool restored = false;
2580         int rc = 0;
2581         ENTRY;
2582
2583         memset(&dev->od_scrub, 0, sizeof(struct osd_scrub));
2584         OBD_SET_CTXT_MAGIC(ctxt);
2585         ctxt->pwdmnt = dev->od_mnt;
2586         ctxt->pwd = dev->od_mnt->mnt_root;
2587         ctxt->fs = KERNEL_DS;
2588
2589         init_waitqueue_head(&scrub->os_thread.t_ctl_waitq);
2590         init_rwsem(&scrub->os_rwsem);
2591         spin_lock_init(&scrub->os_lock);
2592         INIT_LIST_HEAD(&scrub->os_inconsistent_items);
2593         scrub->os_name = osd_name(dev);
2594
2595         push_ctxt(&saved, ctxt);
2596         filp = filp_open(osd_scrub_name, O_RDWR |
2597                          (dev->od_dt_dev.dd_rdonly ? 0 : O_CREAT), 0644);
2598         if (IS_ERR(filp)) {
2599                 pop_ctxt(&saved, ctxt);
2600                 RETURN(PTR_ERR(filp));
2601         }
2602
2603         inode = file_inode(filp);
2604         if (!dev->od_dt_dev.dd_rdonly) {
2605                 /* 'What the @fid is' is not imporatant, because the object
2606                  * has no OI mapping, and only is visible inside the OSD.*/
2607                 lu_igif_build(fid, inode->i_ino, inode->i_generation);
2608                 rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
2609                 if (rc) {
2610                         filp_close(filp, NULL);
2611                         pop_ctxt(&saved, ctxt);
2612                         RETURN(rc);
2613                 }
2614         }
2615
2616         osd_id_gen(id, inode->i_ino, inode->i_generation);
2617         osd_add_oi_cache(info, dev, id, fid);
2618         filp_close(filp, NULL);
2619         pop_ctxt(&saved, ctxt);
2620
2621         obj = lu2dt(lu_object_find_slice(env, osd2lu_dev(dev), fid, NULL));
2622         if (IS_ERR_OR_NULL(obj))
2623                 RETURN(obj ? PTR_ERR(obj) : -ENOENT);
2624
2625 #ifndef HAVE_S_UUID_AS_UUID_T
2626         memcpy(dev->od_uuid.b, sb->s_uuid, UUID_SIZE);
2627 #else
2628         uuid_copy(&dev->od_uuid, &sb->s_uuid);
2629 #endif
2630         scrub->os_obj = obj;
2631         rc = scrub_file_load(env, scrub);
2632         if (rc == -ENOENT || rc == -EFAULT) {
2633                 scrub_file_init(scrub, dev->od_uuid);
2634                 /* If the "/O" dir does not exist when mount (indicated by
2635                  * osd_device::od_maybe_new), neither for the "/OI_scrub",
2636                  * then it is quite probably that the device is a new one,
2637                  * under such case, mark it as SIF_NO_HANDLE_OLD_FID.
2638                  *
2639                  * For the rare case that "/O" and "OI_scrub" both lost on
2640                  * an old device, it can be found and cleared later.
2641                  *
2642                  * For the system with "SIF_NO_HANDLE_OLD_FID", we do not
2643                  * need to check "filter_fid_18_23" and to convert it to
2644                  * "filter_fid" for each object, and all the IGIF should
2645                  * have their FID mapping in OI files already. */
2646                 if (dev->od_maybe_new && rc == -ENOENT)
2647                         sf->sf_internal_flags = SIF_NO_HANDLE_OLD_FID;
2648                 dirty = true;
2649         } else if (rc < 0) {
2650                 GOTO(cleanup_obj, rc);
2651         } else {
2652                 if (!uuid_equal(&sf->sf_uuid, &dev->od_uuid)) {
2653                         CDEBUG(D_LFSCK,
2654                                "%s: UUID has been changed from %pU to %pU\n",
2655                                osd_dev2name(dev), &sf->sf_uuid, &dev->od_uuid);
2656                         scrub_file_reset(scrub, dev->od_uuid, SF_INCONSISTENT);
2657                         dirty = true;
2658                         restored = true;
2659                 } else if (sf->sf_status == SS_SCANNING) {
2660                         sf->sf_status = SS_CRASHED;
2661                         dirty = true;
2662                 }
2663
2664                 if ((sf->sf_oi_count & (sf->sf_oi_count - 1)) != 0) {
2665                         LCONSOLE_WARN("%s: invalid oi count %d, set it to %d\n",
2666                                       osd_dev2name(dev), sf->sf_oi_count,
2667                                       osd_oi_count);
2668                         sf->sf_oi_count = osd_oi_count;
2669                         dirty = true;
2670                 }
2671         }
2672
2673         if (sf->sf_pos_last_checkpoint != 0)
2674                 scrub->os_pos_current = sf->sf_pos_last_checkpoint + 1;
2675         else
2676                 scrub->os_pos_current = LDISKFS_FIRST_INO(sb) + 1;
2677
2678         if (dirty) {
2679                 rc = scrub_file_store(env, scrub);
2680                 if (rc)
2681                         GOTO(cleanup_obj, rc);
2682         }
2683
2684         /* Initialize OI files. */
2685         rc = osd_oi_init(info, dev, restored);
2686         if (rc < 0)
2687                 GOTO(cleanup_obj, rc);
2688
2689         if (!dev->od_dt_dev.dd_rdonly)
2690                 osd_initial_OI_scrub(info, dev);
2691
2692         if (sf->sf_flags & SF_UPGRADE ||
2693             !(sf->sf_internal_flags & SIF_NO_HANDLE_OLD_FID ||
2694               sf->sf_success_count > 0)) {
2695                 dev->od_igif_inoi = 0;
2696                 dev->od_check_ff = dev->od_is_ost;
2697         } else {
2698                 dev->od_igif_inoi = 1;
2699                 dev->od_check_ff = 0;
2700         }
2701
2702         if (sf->sf_flags & SF_INCONSISTENT)
2703                 /* The 'od_igif_inoi' will be set under the
2704                  * following cases:
2705                  * 1) new created system, or
2706                  * 2) restored from file-level backup, or
2707                  * 3) the upgrading completed.
2708                  *
2709                  * The 'od_igif_inoi' may be cleared by OI scrub
2710                  * later if found that the system is upgrading. */
2711                 dev->od_igif_inoi = 1;
2712
2713         if (!dev->od_dt_dev.dd_rdonly &&
2714             dev->od_auto_scrub_interval != AS_NEVER &&
2715             ((sf->sf_status == SS_PAUSED) ||
2716              (sf->sf_status == SS_CRASHED &&
2717               sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT |
2718                               SF_UPGRADE | SF_AUTO)) ||
2719              (sf->sf_status == SS_INIT &&
2720               sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT |
2721                               SF_UPGRADE))))
2722                 rc = osd_scrub_start(env, dev, SS_AUTO_FULL);
2723
2724         if (rc != 0)
2725                 GOTO(cleanup_oi, rc);
2726
2727         /* it is possible that dcache entries may keep objects after they are
2728          * deleted by OSD. While it looks safe this can cause object data to
2729          * stay until umount causing failures in tests calculating free space,
2730          * e.g. replay-ost-single. Since those dcache entries are not used
2731          * anymore let's just free them after use here */
2732         shrink_dcache_sb(sb);
2733
2734         RETURN(0);
2735 cleanup_oi:
2736         osd_oi_fini(info, dev);
2737 cleanup_obj:
2738         dt_object_put_nocache(env, scrub->os_obj);
2739         scrub->os_obj = NULL;
2740
2741         return rc;
2742 }
2743
2744 void osd_scrub_cleanup(const struct lu_env *env, struct osd_device *dev)
2745 {
2746         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2747
2748         LASSERT(dev->od_otable_it == NULL);
2749
2750         if (scrub->os_obj != NULL) {
2751                 osd_scrub_stop(dev);
2752                 dt_object_put_nocache(env, scrub->os_obj);
2753                 scrub->os_obj = NULL;
2754         }
2755         if (dev->od_oi_table != NULL)
2756                 osd_oi_fini(osd_oti_get(env), dev);
2757 }
2758
2759 /* object table based iteration APIs */
2760
2761 static struct dt_it *osd_otable_it_init(const struct lu_env *env,
2762                                        struct dt_object *dt, __u32 attr)
2763 {
2764         enum dt_otable_it_flags flags = attr >> DT_OTABLE_IT_FLAGS_SHIFT;
2765         enum dt_otable_it_valid valid = attr & ~DT_OTABLE_IT_FLAGS_MASK;
2766         struct osd_device      *dev   = osd_dev(dt->do_lu.lo_dev);
2767         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2768         struct osd_otable_it   *it;
2769         __u32                   start = 0;
2770         int                     rc;
2771         ENTRY;
2772
2773         /* od_otable_mutex: prevent curcurrent init/fini */
2774         mutex_lock(&dev->od_otable_mutex);
2775         if (dev->od_otable_it != NULL)
2776                 GOTO(out, it = ERR_PTR(-EALREADY));
2777
2778         OBD_ALLOC_PTR(it);
2779         if (it == NULL)
2780                 GOTO(out, it = ERR_PTR(-ENOMEM));
2781
2782         dev->od_otable_it = it;
2783         it->ooi_dev = dev;
2784         it->ooi_cache.ooc_consumer_idx = -1;
2785         if (flags & DOIF_OUTUSED)
2786                 it->ooi_used_outside = 1;
2787
2788         if (flags & DOIF_RESET)
2789                 start |= SS_RESET;
2790
2791         if (valid & DOIV_ERROR_HANDLE) {
2792                 if (flags & DOIF_FAILOUT)
2793                         start |= SS_SET_FAILOUT;
2794                 else
2795                         start |= SS_CLEAR_FAILOUT;
2796         }
2797
2798         if (valid & DOIV_DRYRUN) {
2799                 if (flags & DOIF_DRYRUN)
2800                         start |= SS_SET_DRYRUN;
2801                 else
2802                         start |= SS_CLEAR_DRYRUN;
2803         }
2804
2805         rc = scrub_start(osd_scrub_main, scrub, dev, start & ~SS_AUTO_PARTIAL);
2806         if (rc == -EALREADY) {
2807                 it->ooi_cache.ooc_pos_preload = scrub->os_pos_current;
2808         } else  if (rc < 0) {
2809                 dev->od_otable_it = NULL;
2810                 OBD_FREE_PTR(it);
2811                 it = ERR_PTR(rc);
2812         } else {
2813                 /* We have to start from the begining. */
2814                 it->ooi_cache.ooc_pos_preload =
2815                         LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
2816         }
2817
2818         GOTO(out, it);
2819
2820 out:
2821         mutex_unlock(&dev->od_otable_mutex);
2822         return (struct dt_it *)it;
2823 }
2824
2825 static void osd_otable_it_fini(const struct lu_env *env, struct dt_it *di)
2826 {
2827         struct osd_otable_it *it  = (struct osd_otable_it *)di;
2828         struct osd_device    *dev = it->ooi_dev;
2829
2830         /* od_otable_mutex: prevent curcurrent init/fini */
2831         mutex_lock(&dev->od_otable_mutex);
2832         scrub_stop(&dev->od_scrub.os_scrub);
2833         LASSERT(dev->od_otable_it == it);
2834
2835         dev->od_otable_it = NULL;
2836         mutex_unlock(&dev->od_otable_mutex);
2837         OBD_FREE_PTR(it);
2838 }
2839
2840 static int osd_otable_it_get(const struct lu_env *env,
2841                              struct dt_it *di, const struct dt_key *key)
2842 {
2843         return 0;
2844 }
2845
2846 static void osd_otable_it_put(const struct lu_env *env, struct dt_it *di)
2847 {
2848 }
2849
2850 static inline int
2851 osd_otable_it_wakeup(struct lustre_scrub *scrub, struct osd_otable_it *it)
2852 {
2853         spin_lock(&scrub->os_lock);
2854         if (it->ooi_cache.ooc_pos_preload < scrub->os_pos_current ||
2855             scrub->os_waiting ||
2856             !thread_is_running(&scrub->os_thread))
2857                 it->ooi_waiting = 0;
2858         else
2859                 it->ooi_waiting = 1;
2860         spin_unlock(&scrub->os_lock);
2861
2862         return !it->ooi_waiting;
2863 }
2864
2865 static int osd_otable_it_next(const struct lu_env *env, struct dt_it *di)
2866 {
2867         struct osd_otable_it    *it     = (struct osd_otable_it *)di;
2868         struct osd_device       *dev    = it->ooi_dev;
2869         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2870         struct osd_otable_cache *ooc    = &it->ooi_cache;
2871         struct ptlrpc_thread    *thread = &scrub->os_thread;
2872         struct l_wait_info       lwi    = { 0 };
2873         int                      rc;
2874         ENTRY;
2875
2876         LASSERT(it->ooi_user_ready);
2877
2878 again:
2879         if (!thread_is_running(thread) && !it->ooi_used_outside)
2880                 RETURN(1);
2881
2882         if (ooc->ooc_cached_items > 0) {
2883                 ooc->ooc_cached_items--;
2884                 ooc->ooc_consumer_idx = (ooc->ooc_consumer_idx + 1) &
2885                                         ~OSD_OTABLE_IT_CACHE_MASK;
2886                 RETURN(0);
2887         }
2888
2889         if (it->ooi_all_cached) {
2890                 l_wait_event(thread->t_ctl_waitq,
2891                              !thread_is_running(thread),
2892                              &lwi);
2893                 RETURN(1);
2894         }
2895
2896         if (scrub->os_waiting && osd_scrub_has_window(scrub, ooc)) {
2897                 spin_lock(&scrub->os_lock);
2898                 scrub->os_waiting = 0;
2899                 wake_up_all(&scrub->os_thread.t_ctl_waitq);
2900                 spin_unlock(&scrub->os_lock);
2901         }
2902
2903         if (it->ooi_cache.ooc_pos_preload >= scrub->os_pos_current)
2904                 l_wait_event(thread->t_ctl_waitq,
2905                              osd_otable_it_wakeup(scrub, it),
2906                              &lwi);
2907
2908         if (!thread_is_running(thread) && !it->ooi_used_outside)
2909                 RETURN(1);
2910
2911         rc = osd_otable_it_preload(env, it);
2912         if (rc >= 0)
2913                 goto again;
2914
2915         RETURN(rc);
2916 }
2917
2918 static struct dt_key *osd_otable_it_key(const struct lu_env *env,
2919                                         const struct dt_it *di)
2920 {
2921         return NULL;
2922 }
2923
2924 static int osd_otable_it_key_size(const struct lu_env *env,
2925                                   const struct dt_it *di)
2926 {
2927         return sizeof(__u64);
2928 }
2929
2930 static int osd_otable_it_rec(const struct lu_env *env, const struct dt_it *di,
2931                              struct dt_rec *rec, __u32 attr)
2932 {
2933         struct osd_otable_it    *it  = (struct osd_otable_it *)di;
2934         struct osd_otable_cache *ooc = &it->ooi_cache;
2935
2936         *(struct lu_fid *)rec = ooc->ooc_cache[ooc->ooc_consumer_idx].oic_fid;
2937
2938         /* Filter out Invald FID already. */
2939         LASSERTF(fid_is_sane((struct lu_fid *)rec),
2940                  "Invalid FID "DFID", p_idx = %d, c_idx = %d\n",
2941                  PFID((struct lu_fid *)rec),
2942                  ooc->ooc_producer_idx, ooc->ooc_consumer_idx);
2943
2944         return 0;
2945 }
2946
2947 static __u64 osd_otable_it_store(const struct lu_env *env,
2948                                  const struct dt_it *di)
2949 {
2950         struct osd_otable_it    *it  = (struct osd_otable_it *)di;
2951         struct osd_otable_cache *ooc = &it->ooi_cache;
2952         __u64                    hash;
2953
2954         if (it->ooi_user_ready && ooc->ooc_consumer_idx != -1)
2955                 hash = ooc->ooc_cache[ooc->ooc_consumer_idx].oic_lid.oii_ino;
2956         else
2957                 hash = ooc->ooc_pos_preload;
2958         return hash;
2959 }
2960
2961 /**
2962  * Set the OSD layer iteration start position as the specified hash.
2963  */
2964 static int osd_otable_it_load(const struct lu_env *env,
2965                               const struct dt_it *di, __u64 hash)
2966 {
2967         struct osd_otable_it    *it    = (struct osd_otable_it *)di;
2968         struct osd_device       *dev   = it->ooi_dev;
2969         struct osd_otable_cache *ooc   = &it->ooi_cache;
2970         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
2971         struct osd_iit_param    *param = &it->ooi_iit_param;
2972         int                      rc;
2973         ENTRY;
2974
2975         /* Forbid to set iteration position after iteration started. */
2976         if (it->ooi_user_ready)
2977                 RETURN(-EPERM);
2978
2979         LASSERT(!scrub->os_partial_scan);
2980
2981         if (hash > OSD_OTABLE_MAX_HASH)
2982                 hash = OSD_OTABLE_MAX_HASH;
2983
2984         /* The hash is the last checkpoint position,
2985          * we will start from the next one. */
2986         ooc->ooc_pos_preload = hash + 1;
2987         if (ooc->ooc_pos_preload <= LDISKFS_FIRST_INO(osd_sb(dev)))
2988                 ooc->ooc_pos_preload = LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
2989
2990         it->ooi_user_ready = 1;
2991         if (!scrub->os_full_speed)
2992                 wake_up_all(&scrub->os_thread.t_ctl_waitq);
2993
2994         memset(param, 0, sizeof(*param));
2995         param->sb = osd_sb(dev);
2996         param->start = ooc->ooc_pos_preload;
2997         param->bg = (ooc->ooc_pos_preload - 1) /
2998                     LDISKFS_INODES_PER_GROUP(param->sb);
2999         param->offset = (ooc->ooc_pos_preload - 1) %
3000                         LDISKFS_INODES_PER_GROUP(param->sb);
3001         param->gbase = 1 + param->bg * LDISKFS_INODES_PER_GROUP(param->sb);
3002
3003         /* Unplug OSD layer iteration by the first next() call. */
3004         rc = osd_otable_it_next(env, (struct dt_it *)it);
3005
3006         RETURN(rc);
3007 }
3008
3009 static int osd_otable_it_key_rec(const struct lu_env *env,
3010                                  const struct dt_it *di, void *key_rec)
3011 {
3012         return 0;
3013 }
3014
3015 const struct dt_index_operations osd_otable_ops = {
3016         .dio_it = {
3017                 .init     = osd_otable_it_init,
3018                 .fini     = osd_otable_it_fini,
3019                 .get      = osd_otable_it_get,
3020                 .put      = osd_otable_it_put,
3021                 .next     = osd_otable_it_next,
3022                 .key      = osd_otable_it_key,
3023                 .key_size = osd_otable_it_key_size,
3024                 .rec      = osd_otable_it_rec,
3025                 .store    = osd_otable_it_store,
3026                 .load     = osd_otable_it_load,
3027                 .key_rec  = osd_otable_it_key_rec,
3028         }
3029 };
3030
3031 /* high priority inconsistent items list APIs */
3032
3033 #define SCRUB_BAD_OIMAP_DECAY_INTERVAL  60
3034
3035 int osd_oii_insert(struct osd_device *dev, struct osd_idmap_cache *oic,
3036                    int insert)
3037 {
3038         struct osd_inconsistent_item *oii;
3039         struct osd_scrub *oscrub = &dev->od_scrub;
3040         struct lustre_scrub *lscrub = &oscrub->os_scrub;
3041         struct ptlrpc_thread *thread = &lscrub->os_thread;
3042         int wakeup = 0;
3043         ENTRY;
3044
3045         OBD_ALLOC_PTR(oii);
3046         if (unlikely(oii == NULL))
3047                 RETURN(-ENOMEM);
3048
3049         INIT_LIST_HEAD(&oii->oii_list);
3050         oii->oii_cache = *oic;
3051         oii->oii_insert = insert;
3052
3053         if (lscrub->os_partial_scan) {
3054                 __u64 now = ktime_get_real_seconds();
3055
3056                 /* If there haven't been errors in a long time,
3057                  * decay old count until either the errors are
3058                  * gone or we reach the current interval. */
3059                 while (unlikely(oscrub->os_bad_oimap_count > 0 &&
3060                                 oscrub->os_bad_oimap_time +
3061                                 SCRUB_BAD_OIMAP_DECAY_INTERVAL < now)) {
3062                         oscrub->os_bad_oimap_count >>= 1;
3063                         oscrub->os_bad_oimap_time +=
3064                                 SCRUB_BAD_OIMAP_DECAY_INTERVAL;
3065                 }
3066
3067                 oscrub->os_bad_oimap_time = now;
3068                 if (++oscrub->os_bad_oimap_count >
3069                     dev->od_full_scrub_threshold_rate)
3070                         lscrub->os_full_scrub = 1;
3071         }
3072
3073         spin_lock(&lscrub->os_lock);
3074         if (unlikely(!thread_is_running(thread))) {
3075                 spin_unlock(&lscrub->os_lock);
3076                 OBD_FREE_PTR(oii);
3077                 RETURN(-EAGAIN);
3078         }
3079
3080         if (list_empty(&lscrub->os_inconsistent_items))
3081                 wakeup = 1;
3082         list_add_tail(&oii->oii_list, &lscrub->os_inconsistent_items);
3083         spin_unlock(&lscrub->os_lock);
3084
3085         if (wakeup != 0)
3086                 wake_up_all(&thread->t_ctl_waitq);
3087
3088         RETURN(0);
3089 }
3090
3091 int osd_oii_lookup(struct osd_device *dev, const struct lu_fid *fid,
3092                    struct osd_inode_id *id)
3093 {
3094         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
3095         struct osd_inconsistent_item *oii;
3096         ENTRY;
3097
3098         spin_lock(&scrub->os_lock);
3099         list_for_each_entry(oii, &scrub->os_inconsistent_items, oii_list) {
3100                 if (lu_fid_eq(fid, &oii->oii_cache.oic_fid)) {
3101                         *id = oii->oii_cache.oic_lid;
3102                         spin_unlock(&scrub->os_lock);
3103                         RETURN(0);
3104                 }
3105         }
3106         spin_unlock(&scrub->os_lock);
3107
3108         RETURN(-ENOENT);
3109 }
3110
3111 void osd_scrub_dump(struct seq_file *m, struct osd_device *dev)
3112 {
3113         struct osd_scrub *scrub = &dev->od_scrub;
3114
3115         scrub_dump(m, &scrub->os_scrub);
3116         seq_printf(m, "lf_scanned: %llu\n"
3117                    "lf_%s: %llu\n"
3118                    "lf_failed: %llu\n",
3119                    scrub->os_lf_scanned,
3120                    scrub->os_scrub.os_file.sf_param & SP_DRYRUN ?
3121                         "inconsistent" : "repaired",
3122                    scrub->os_lf_repaired,
3123                    scrub->os_lf_failed);
3124 }