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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License version 2 for more details.  A copy is
  14  * included in the COPYING file that accompanied this code.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2012, 2014, 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 <lustre/lustre_idl.h>
  41 #include <lustre_disk.h>
  42 #include <dt_object.h>
  43 #include <linux/xattr.h>
  44
  45 #include "osd_internal.h"
  46 #include "osd_oi.h"
  47 #include "osd_scrub.h"
  48
  49 #define HALF_SEC        msecs_to_jiffies(MSEC_PER_SEC >> 1)
  50
  51 #define OSD_OTABLE_MAX_HASH             0x00000000ffffffffULL
  52
  53 #define SCRUB_NEXT_BREAK        1 /* exit current loop and process next group */
  54 #define SCRUB_NEXT_CONTINUE     2 /* skip current object and process next bit */
  55 #define SCRUB_NEXT_EXIT         3 /* exit all the loops */
  56 #define SCRUB_NEXT_WAIT         4 /* wait for free cache slot */
  57 #define SCRUB_NEXT_CRASH        5 /* simulate system crash during OI scrub */
  58 #define SCRUB_NEXT_FATAL        6 /* simulate failure during OI scrub */
  59 #define SCRUB_NEXT_NOSCRUB      7 /* new created object, no scrub on it */
  60 #define SCRUB_NEXT_NOLMA        8 /* the inode has no FID-in-LMA */
  61 #define SCRUB_NEXT_OSTOBJ       9 /* for OST-object */
  62 #define SCRUB_NEXT_OSTOBJ_OLD   10 /* old OST-object, no LMA or no FID-on-OST
  63                                     * flags in LMA */
  64
  65 /* misc functions */
  66
  67 static inline struct osd_device *osd_scrub2dev(struct osd_scrub *scrub)
  68 {
  69         return container_of0(scrub, struct osd_device, od_scrub);
  70 }
  71
  72 static inline struct super_block *osd_scrub2sb(struct osd_scrub *scrub)
  73 {
  74         return osd_sb(osd_scrub2dev(scrub));
  75 }
  76
  77 static inline int osd_scrub_has_window(struct osd_scrub *scrub,
  78                                        struct osd_otable_cache *ooc)
  79 {
  80         return scrub->os_pos_current < ooc->ooc_pos_preload + SCRUB_WINDOW_SIZE;
  81 }
  82
  83 static inline const char *osd_scrub2name(struct osd_scrub *scrub)
  84 {
  85         return LDISKFS_SB(osd_scrub2sb(scrub))->s_es->s_volume_name;
  86 }
  87
  88 /**
  89  * update/insert/delete the specified OI mapping (@fid @id) according to the ops
  90  *
  91  * \retval   1, changed nothing
  92  * \retval   0, changed successfully
  93  * \retval -ve, on error
  94  */
  95 static int osd_scrub_refresh_mapping(struct osd_thread_info *info,
  96                                      struct osd_device *dev,
  97                                      const struct lu_fid *fid,
  98                                      const struct osd_inode_id *id,
  99                                      int ops, bool force,
 100                                      enum oi_check_flags flags)
 101 {
 102         handle_t *th;
 103         int       rc;
 104         ENTRY;
 105
 106         if (dev->od_scrub.os_file.sf_param & SP_DRYRUN && !force)
 107                 RETURN(0);
 108
 109         /* DTO_INDEX_INSERT is enough for other two ops:
 110          * delete/update, but save stack. */
 111         th = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC,
 112                                 osd_dto_credits_noquota[DTO_INDEX_INSERT]);
 113         if (IS_ERR(th)) {
 114                 rc = PTR_ERR(th);
 115                 CDEBUG(D_LFSCK, "%s: fail to start trans for scrub op %d "
 116                        DFID" => %u/%u: rc = %d\n", osd_name(dev), ops,
 117                        PFID(fid), id->oii_ino, id->oii_gen, rc);
 118                 RETURN(rc);
 119         }
 120
 121         switch (ops) {
 122         case DTO_INDEX_UPDATE:
 123                 rc = osd_oi_update(info, dev, fid, id, th, flags);
 124                 if (unlikely(rc == -ENOENT)) {
 125                         /* Some unlink thread may removed the OI mapping. */
 126                         rc = 1;
 127                 }
 128                 break;
 129         case DTO_INDEX_INSERT:
 130                 rc = osd_oi_insert(info, dev, fid, id, th, flags);
 131                 if (unlikely(rc == -EEXIST)) {
 132                         rc = 1;
 133                         /* XXX: There are trouble things when adding OI
 134                          *      mapping for IGIF object, which may cause
 135                          *      multiple objects to be mapped to the same
 136                          *      IGIF formatted FID. Consider the following
 137                          *      situations:
 138                          *
 139                          *      1) The MDT is upgrading from 1.8 device.
 140                          *      The OI scrub generates IGIF FID1 for the
 141                          *      OBJ1 and adds the OI mapping.
 142                          *
 143                          *      2) For some reason, the OI scrub does not
 144                          *      process all the IGIF objects completely.
 145                          *
 146                          *      3) The MDT is backuped and restored against
 147                          *      this device.
 148                          *
 149                          *      4) When the MDT mounts up, the OI scrub will
 150                          *      try to rebuild the OI files. For some IGIF
 151                          *      object, OBJ2, which was not processed by the
 152                          *      OI scrub before the backup/restore, and the
 153                          *      new generated IGIF formatted FID may be just
 154                          *      the FID1, the same as OBJ1.
 155                          *
 156                          *      Under such case, the OI scrub cannot know how
 157                          *      to generate new FID for the OBJ2.
 158                          *
 159                          *      Currently, we do nothing for that. One possible
 160                          *      solution is to generate new normal FID for the
 161                          *      conflict object.
 162                          *
 163                          *      Anyway, it is rare, only exists in theory. */
 164                 }
 165                 break;
 166         case DTO_INDEX_DELETE:
 167                 rc = osd_oi_delete(info, dev, fid, th, flags);
 168                 if (rc == -ENOENT) {
 169                         /* It is normal that the unlink thread has removed the
 170                          * OI mapping already. */
 171                         rc = 1;
 172                 }
 173                 break;
 174         default:
 175                 LASSERTF(0, "Unexpected ops %d\n", ops);
 176                 break;
 177         }
 178
 179         ldiskfs_journal_stop(th);
 180         if (rc < 0)
 181                 CDEBUG(D_LFSCK, "%s: fail to refresh OI map for scrub op %d "
 182                        DFID" => %u/%u: rc = %d\n", osd_name(dev), ops,
 183                        PFID(fid), id->oii_ino, id->oii_gen, rc);
 184
 185         RETURN(rc);
 186 }
 187
 188 /* OI_scrub file ops */
 189
 190 static void osd_scrub_file_to_cpu(struct scrub_file *des,
 191                                   struct scrub_file *src)
 192 {
 193         memcpy(des->sf_uuid, src->sf_uuid, 16);
 194         des->sf_flags   = le64_to_cpu(src->sf_flags);
 195         des->sf_magic   = le32_to_cpu(src->sf_magic);
 196         des->sf_status  = le16_to_cpu(src->sf_status);
 197         des->sf_param   = le16_to_cpu(src->sf_param);
 198         des->sf_time_last_complete      =
 199                                 le64_to_cpu(src->sf_time_last_complete);
 200         des->sf_time_latest_start       =
 201                                 le64_to_cpu(src->sf_time_latest_start);
 202         des->sf_time_last_checkpoint    =
 203                                 le64_to_cpu(src->sf_time_last_checkpoint);
 204         des->sf_pos_latest_start        =
 205                                 le64_to_cpu(src->sf_pos_latest_start);
 206         des->sf_pos_last_checkpoint     =
 207                                 le64_to_cpu(src->sf_pos_last_checkpoint);
 208         des->sf_pos_first_inconsistent  =
 209                                 le64_to_cpu(src->sf_pos_first_inconsistent);
 210         des->sf_items_checked           =
 211                                 le64_to_cpu(src->sf_items_checked);
 212         des->sf_items_updated           =
 213                                 le64_to_cpu(src->sf_items_updated);
 214         des->sf_items_failed            =
 215                                 le64_to_cpu(src->sf_items_failed);
 216         des->sf_items_updated_prior     =
 217                                 le64_to_cpu(src->sf_items_updated_prior);
 218         des->sf_run_time        = le32_to_cpu(src->sf_run_time);
 219         des->sf_success_count   = le32_to_cpu(src->sf_success_count);
 220         des->sf_oi_count        = le16_to_cpu(src->sf_oi_count);
 221         des->sf_internal_flags  = le16_to_cpu(src->sf_internal_flags);
 222         memcpy(des->sf_oi_bitmap, src->sf_oi_bitmap, SCRUB_OI_BITMAP_SIZE);
 223 }
 224
 225 static void osd_scrub_file_to_le(struct scrub_file *des,
 226                                  struct scrub_file *src)
 227 {
 228         memcpy(des->sf_uuid, src->sf_uuid, 16);
 229         des->sf_flags   = cpu_to_le64(src->sf_flags);
 230         des->sf_magic   = cpu_to_le32(src->sf_magic);
 231         des->sf_status  = cpu_to_le16(src->sf_status);
 232         des->sf_param   = cpu_to_le16(src->sf_param);
 233         des->sf_time_last_complete      =
 234                                 cpu_to_le64(src->sf_time_last_complete);
 235         des->sf_time_latest_start       =
 236                                 cpu_to_le64(src->sf_time_latest_start);
 237         des->sf_time_last_checkpoint    =
 238                                 cpu_to_le64(src->sf_time_last_checkpoint);
 239         des->sf_pos_latest_start        =
 240                                 cpu_to_le64(src->sf_pos_latest_start);
 241         des->sf_pos_last_checkpoint     =
 242                                 cpu_to_le64(src->sf_pos_last_checkpoint);
 243         des->sf_pos_first_inconsistent  =
 244                                 cpu_to_le64(src->sf_pos_first_inconsistent);
 245         des->sf_items_checked           =
 246                                 cpu_to_le64(src->sf_items_checked);
 247         des->sf_items_updated           =
 248                                 cpu_to_le64(src->sf_items_updated);
 249         des->sf_items_failed            =
 250                                 cpu_to_le64(src->sf_items_failed);
 251         des->sf_items_updated_prior     =
 252                                 cpu_to_le64(src->sf_items_updated_prior);
 253         des->sf_run_time        = cpu_to_le32(src->sf_run_time);
 254         des->sf_success_count   = cpu_to_le32(src->sf_success_count);
 255         des->sf_oi_count        = cpu_to_le16(src->sf_oi_count);
 256         des->sf_internal_flags  = cpu_to_le16(src->sf_internal_flags);
 257         memcpy(des->sf_oi_bitmap, src->sf_oi_bitmap, SCRUB_OI_BITMAP_SIZE);
 258 }
 259
 260 static void osd_scrub_file_init(struct osd_scrub *scrub, __u8 *uuid)
 261 {
 262         struct scrub_file *sf = &scrub->os_file;
 263
 264         memset(sf, 0, sizeof(*sf));
 265         memcpy(sf->sf_uuid, uuid, 16);
 266         sf->sf_magic = SCRUB_MAGIC_V1;
 267         sf->sf_status = SS_INIT;
 268 }
 269
 270 void osd_scrub_file_reset(struct osd_scrub *scrub, __u8 *uuid, __u64 flags)
 271 {
 272         struct scrub_file *sf = &scrub->os_file;
 273
 274         CDEBUG(D_LFSCK, "%.16s: reset OI scrub file, old flags = "
 275                LPX64", add flags = "LPX64"\n",
 276                osd_scrub2name(scrub), sf->sf_flags, flags);
 277
 278         memcpy(sf->sf_uuid, uuid, 16);
 279         sf->sf_status = SS_INIT;
 280         sf->sf_flags |= flags;
 281         sf->sf_flags &= ~SF_AUTO;
 282         sf->sf_run_time = 0;
 283         sf->sf_time_latest_start = 0;
 284         sf->sf_time_last_checkpoint = 0;
 285         sf->sf_pos_latest_start = 0;
 286         sf->sf_pos_last_checkpoint = 0;
 287         sf->sf_pos_first_inconsistent = 0;
 288         sf->sf_items_checked = 0;
 289         sf->sf_items_updated = 0;
 290         sf->sf_items_failed = 0;
 291         if (!scrub->os_in_join)
 292                 sf->sf_items_updated_prior = 0;
 293
 294         sf->sf_items_noscrub = 0;
 295         sf->sf_items_igif = 0;
 296 }
 297
 298 static int osd_scrub_file_load(struct osd_scrub *scrub)
 299 {
 300         loff_t  pos  = 0;
 301         int     len  = sizeof(scrub->os_file_disk);
 302         int     rc;
 303
 304         rc = osd_ldiskfs_read(scrub->os_inode, &scrub->os_file_disk, len, &pos);
 305         if (rc == len) {
 306                 struct scrub_file *sf = &scrub->os_file;
 307
 308                 osd_scrub_file_to_cpu(sf, &scrub->os_file_disk);
 309                 if (sf->sf_magic != SCRUB_MAGIC_V1) {
 310                         CDEBUG(D_LFSCK, "%.16s: invalid scrub magic "
 311                                "0x%x != 0x%x\n", osd_scrub2name(scrub),
 312                                sf->sf_magic, SCRUB_MAGIC_V1);
 313                         /* Process it as new scrub file. */
 314                         rc = -ENOENT;
 315                 } else {
 316                         rc = 0;
 317                 }
 318         } else if (rc != 0) {
 319                 CDEBUG(D_LFSCK, "%.16s: fail to load scrub file, "
 320                        "expected = %d: rc = %d\n",
 321                        osd_scrub2name(scrub), len, rc);
 322                 if (rc > 0)
 323                         rc = -EFAULT;
 324         } else {
 325                 /* return -ENOENT for empty scrub file case. */
 326                 rc = -ENOENT;
 327         }
 328
 329         return rc;
 330 }
 331
 332 int osd_scrub_file_store(struct osd_scrub *scrub)
 333 {
 334         struct osd_device *dev;
 335         handle_t          *jh;
 336         loff_t             pos     = 0;
 337         int                len     = sizeof(scrub->os_file_disk);
 338         int                credits;
 339         int                rc;
 340
 341         dev = container_of0(scrub, struct osd_device, od_scrub);
 342         credits = osd_dto_credits_noquota[DTO_WRITE_BASE] +
 343                   osd_dto_credits_noquota[DTO_WRITE_BLOCK];
 344         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, credits);
 345         if (IS_ERR(jh)) {
 346                 rc = PTR_ERR(jh);
 347                 CDEBUG(D_LFSCK, "%.16s: fail to start trans for scrub store: "
 348                        "rc = %d\n", osd_scrub2name(scrub), rc);
 349                 return rc;
 350         }
 351
 352         osd_scrub_file_to_le(&scrub->os_file_disk, &scrub->os_file);
 353         rc = osd_ldiskfs_write_record(scrub->os_inode, &scrub->os_file_disk,
 354                                       len, 0, &pos, jh);
 355         ldiskfs_journal_stop(jh);
 356         if (rc != 0)
 357                 CDEBUG(D_LFSCK, "%.16s: fail to store scrub file, "
 358                        "expected = %d: rc = %d\n",
 359                        osd_scrub2name(scrub), len, rc);
 360
 361         scrub->os_time_last_checkpoint = cfs_time_current();
 362         scrub->os_time_next_checkpoint = scrub->os_time_last_checkpoint +
 363                                 cfs_time_seconds(SCRUB_CHECKPOINT_INTERVAL);
 364         return rc;
 365 }
 366
 367 static int
 368 osd_scrub_convert_ff(struct osd_thread_info *info, struct osd_device *dev,
 369                      struct inode *inode, const struct lu_fid *fid)
 370 {
 371         struct filter_fid_old   *ff      = &info->oti_ff;
 372         struct dentry           *dentry  = &info->oti_obj_dentry;
 373         handle_t                *jh;
 374         int                      size    = 0;
 375         int                      rc;
 376         bool                     removed = false;
 377         bool                     reset   = true;
 378         ENTRY;
 379
 380         if (dev->od_scrub.os_file.sf_param & SP_DRYRUN)
 381                 RETURN(0);
 382
 383         /* We want the LMA to fit into the 256-byte OST inode, so operate
 384          * as following:
 385          * 1) read old XATTR_NAME_FID and save the parent FID;
 386          * 2) delete the old XATTR_NAME_FID;
 387          * 3) make new LMA and add it;
 388          * 4) generate new XATTR_NAME_FID with the saved parent FID and add it.
 389          *
 390          * Making the LMA to fit into the 256-byte OST inode can save time for
 391          * normal osd_check_lma() and for other OI scrub scanning in future.
 392          * So it is worth to make some slow conversion here. */
 393         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC,
 394                                 osd_dto_credits_noquota[DTO_XATTR_SET] * 3);
 395         if (IS_ERR(jh)) {
 396                 rc = PTR_ERR(jh);
 397                 CDEBUG(D_LFSCK, "%s: fail to start trans for convert ff "
 398                        DFID": rc = %d\n", osd_name(dev), PFID(fid), rc);
 399                 RETURN(rc);
 400         }
 401
 402         /* 1) read old XATTR_NAME_FID and save the parent FID */
 403         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 404         if (rc == sizeof(*ff)) {
 405                 /* 2) delete the old XATTR_NAME_FID */
 406                 ll_vfs_dq_init(inode);
 407                 rc = inode->i_op->removexattr(dentry, XATTR_NAME_FID);
 408                 if (rc != 0)
 409                         GOTO(stop, rc);
 410
 411                 removed = true;
 412         } else if (unlikely(rc == -ENODATA)) {
 413                 reset = false;
 414         } else if (rc != sizeof(struct filter_fid)) {
 415                 GOTO(stop, rc = -EINVAL);
 416         }
 417
 418         /* 3) make new LMA and add it */
 419         rc = osd_ea_fid_set(info, inode, fid, LMAC_FID_ON_OST, 0);
 420         if (rc == 0 && reset)
 421                 size = sizeof(struct filter_fid);
 422         else if (rc != 0 && removed)
 423                 /* If failed, we should try to add the old back. */
 424                 size = sizeof(struct filter_fid_old);
 425
 426         /* 4) generate new XATTR_NAME_FID with the saved parent FID and add it*/
 427         if (size > 0) {
 428                 int rc1;
 429
 430                 rc1 = __osd_xattr_set(info, inode, XATTR_NAME_FID, ff, size,
 431                                       XATTR_CREATE);
 432                 if (rc1 != 0 && rc == 0)
 433                         rc = rc1;
 434         }
 435
 436         GOTO(stop, rc);
 437
 438 stop:
 439         ldiskfs_journal_stop(jh);
 440         if (rc < 0)
 441                 CDEBUG(D_LFSCK, "%s: fail to convert ff "DFID": rc = %d\n",
 442                        osd_name(dev), PFID(fid), rc);
 443         return rc;
 444 }
 445
 446 static int
 447 osd_scrub_check_update(struct osd_thread_info *info, struct osd_device *dev,
 448                        struct osd_idmap_cache *oic, int val)
 449 {
 450         struct osd_scrub             *scrub  = &dev->od_scrub;
 451         struct scrub_file            *sf     = &scrub->os_file;
 452         struct lu_fid                *fid    = &oic->oic_fid;
 453         struct osd_inode_id          *lid    = &oic->oic_lid;
 454         struct osd_inode_id          *lid2   = &info->oti_id;
 455         struct osd_inconsistent_item *oii    = NULL;
 456         struct inode                 *inode  = NULL;
 457         int                           ops    = DTO_INDEX_UPDATE;
 458         int                           idx;
 459         int                           rc;
 460         bool                          converted = false;
 461         ENTRY;
 462
 463         down_write(&scrub->os_rwsem);
 464         scrub->os_new_checked++;
 465         if (val < 0)
 466                 GOTO(out, rc = val);
 467
 468         if (scrub->os_in_prior)
 469                 oii = list_entry(oic, struct osd_inconsistent_item,
 470                                  oii_cache);
 471
 472         if (lid->oii_ino < sf->sf_pos_latest_start && oii == NULL)
 473                 GOTO(out, rc = 0);
 474
 475         if (fid_is_igif(fid))
 476                 sf->sf_items_igif++;
 477
 478         if (val == SCRUB_NEXT_OSTOBJ_OLD) {
 479                 inode = osd_iget(info, dev, lid);
 480                 if (IS_ERR(inode)) {
 481                         rc = PTR_ERR(inode);
 482                         /* Someone removed the inode. */
 483                         if (rc == -ENOENT || rc == -ESTALE)
 484                                 rc = 0;
 485                         GOTO(out, rc);
 486                 }
 487
 488                 sf->sf_flags |= SF_UPGRADE;
 489                 sf->sf_internal_flags &= ~SIF_NO_HANDLE_OLD_FID;
 490                 dev->od_check_ff = 1;
 491                 rc = osd_scrub_convert_ff(info, dev, inode, fid);
 492                 if (rc != 0)
 493                         GOTO(out, rc);
 494
 495                 converted = true;
 496         }
 497
 498         if ((val == SCRUB_NEXT_NOLMA) &&
 499             (!scrub->os_convert_igif || OBD_FAIL_CHECK(OBD_FAIL_FID_NOLMA)))
 500                 GOTO(out, rc = 0);
 501
 502         if ((oii != NULL && oii->oii_insert) || (val == SCRUB_NEXT_NOLMA))
 503                 goto iget;
 504
 505         rc = osd_oi_lookup(info, dev, fid, lid2,
 506                 (val == SCRUB_NEXT_OSTOBJ ||
 507                  val == SCRUB_NEXT_OSTOBJ_OLD) ? OI_KNOWN_ON_OST : 0);
 508         if (rc != 0) {
 509                 if (rc != -ENOENT && rc != -ESTALE)
 510                         GOTO(out, rc);
 511
 512 iget:
 513                 if (inode == NULL) {
 514                         inode = osd_iget(info, dev, lid);
 515                         if (IS_ERR(inode)) {
 516                                 rc = PTR_ERR(inode);
 517                                 /* Someone removed the inode. */
 518                                 if (rc == -ENOENT || rc == -ESTALE)
 519                                         rc = 0;
 520                                 GOTO(out, rc);
 521                         }
 522                 }
 523
 524                 if (!scrub->os_partial_scan)
 525                         scrub->os_full_speed = 1;
 526
 527                 ops = DTO_INDEX_INSERT;
 528                 idx = osd_oi_fid2idx(dev, fid);
 529                 switch (val) {
 530                 case SCRUB_NEXT_NOLMA:
 531                         sf->sf_flags |= SF_UPGRADE;
 532                         if (!(sf->sf_param & SP_DRYRUN)) {
 533                                 rc = osd_ea_fid_set(info, inode, fid, 0, 0);
 534                                 if (rc != 0)
 535                                         GOTO(out, rc);
 536                         }
 537
 538                         if (!(sf->sf_flags & SF_INCONSISTENT))
 539                                 dev->od_igif_inoi = 0;
 540                         break;
 541                 case SCRUB_NEXT_OSTOBJ:
 542                         sf->sf_flags |= SF_INCONSISTENT;
 543                 case SCRUB_NEXT_OSTOBJ_OLD:
 544                         break;
 545                 default:
 546                         sf->sf_flags |= SF_RECREATED;
 547                         if (unlikely(!ldiskfs_test_bit(idx, sf->sf_oi_bitmap)))
 548                                 ldiskfs_set_bit(idx, sf->sf_oi_bitmap);
 549                         break;
 550                 }
 551         } else if (osd_id_eq(lid, lid2)) {
 552                 if (converted)
 553                         sf->sf_items_updated++;
 554
 555                 GOTO(out, rc = 0);
 556         } else {
 557                 if (!scrub->os_partial_scan)
 558                         scrub->os_full_speed = 1;
 559
 560                 sf->sf_flags |= SF_INCONSISTENT;
 561
 562                 /* XXX: If the device is restored from file-level backup, then
 563                  *      some IGIFs may have been already in OI files, and some
 564                  *      may be not yet. Means upgrading from 1.8 may be partly
 565                  *      processed, but some clients may hold some immobilized
 566                  *      IGIFs, and use them to access related objects. Under
 567                  *      such case, OSD does not know whether an given IGIF has
 568                  *      been processed or to be processed, and it also cannot
 569                  *      generate local ino#/gen# directly from the immobilized
 570                  *      IGIF because of the backup/restore. Then force OSD to
 571                  *      lookup the given IGIF in OI files, and if no entry,
 572                  *      then ask the client to retry after upgrading completed.
 573                  *      No better choice. */
 574                 dev->od_igif_inoi = 1;
 575         }
 576
 577         rc = osd_scrub_refresh_mapping(info, dev, fid, lid, ops, false,
 578                         (val == SCRUB_NEXT_OSTOBJ ||
 579                          val == SCRUB_NEXT_OSTOBJ_OLD) ? OI_KNOWN_ON_OST : 0);
 580         if (rc == 0) {
 581                 if (scrub->os_in_prior)
 582                         sf->sf_items_updated_prior++;
 583                 else
 584                         sf->sf_items_updated++;
 585         }
 586
 587         GOTO(out, rc);
 588
 589 out:
 590         if (rc < 0) {
 591                 sf->sf_items_failed++;
 592                 if (sf->sf_pos_first_inconsistent == 0 ||
 593                     sf->sf_pos_first_inconsistent > lid->oii_ino)
 594                         sf->sf_pos_first_inconsistent = lid->oii_ino;
 595         } else {
 596                 rc = 0;
 597         }
 598
 599         /* There may be conflict unlink during the OI scrub,
 600          * if happend, then remove the new added OI mapping. */
 601         if (ops == DTO_INDEX_INSERT && inode != NULL && !IS_ERR(inode) &&
 602             unlikely(inode->i_nlink == 0))
 603                 osd_scrub_refresh_mapping(info, dev, fid, lid,
 604                                 DTO_INDEX_DELETE, false,
 605                                 (val == SCRUB_NEXT_OSTOBJ ||
 606                                  val == SCRUB_NEXT_OSTOBJ_OLD) ?
 607                                 OI_KNOWN_ON_OST : 0);
 608         up_write(&scrub->os_rwsem);
 609
 610         if (inode != NULL && !IS_ERR(inode))
 611                 iput(inode);
 612
 613         if (oii != NULL) {
 614                 LASSERT(!list_empty(&oii->oii_list));
 615
 616                 spin_lock(&scrub->os_lock);
 617                 list_del_init(&oii->oii_list);
 618                 spin_unlock(&scrub->os_lock);
 619                 OBD_FREE_PTR(oii);
 620         }
 621         RETURN(sf->sf_param & SP_FAILOUT ? rc : 0);
 622 }
 623
 624 /* OI scrub APIs */
 625
 626 static int osd_scrub_prep(struct osd_device *dev)
 627 {
 628         struct osd_scrub     *scrub  = &dev->od_scrub;
 629         struct ptlrpc_thread *thread = &scrub->os_thread;
 630         struct scrub_file    *sf     = &scrub->os_file;
 631         __u32                 flags  = scrub->os_start_flags;
 632         int                   rc;
 633         bool                  drop_dryrun = false;
 634         ENTRY;
 635
 636         CDEBUG(D_LFSCK, "%.16s: OI scrub prep, flags = 0x%x\n",
 637                osd_scrub2name(scrub), flags);
 638
 639         down_write(&scrub->os_rwsem);
 640         if (flags & SS_SET_FAILOUT)
 641                 sf->sf_param |= SP_FAILOUT;
 642         else if (flags & SS_CLEAR_FAILOUT)
 643                 sf->sf_param &= ~SP_FAILOUT;
 644
 645         if (flags & SS_SET_DRYRUN) {
 646                 sf->sf_param |= SP_DRYRUN;
 647         } else if (flags & SS_CLEAR_DRYRUN && sf->sf_param & SP_DRYRUN) {
 648                 sf->sf_param &= ~SP_DRYRUN;
 649                 drop_dryrun = true;
 650         }
 651
 652         if (flags & SS_RESET)
 653                 osd_scrub_file_reset(scrub,
 654                         LDISKFS_SB(osd_sb(dev))->s_es->s_uuid, 0);
 655
 656         if (flags & SS_AUTO_FULL) {
 657                 scrub->os_full_speed = 1;
 658                 scrub->os_partial_scan = 0;
 659                 sf->sf_flags |= SF_AUTO;
 660         } else if (flags & SS_AUTO_PARTIAL) {
 661                 scrub->os_full_speed = 0;
 662                 scrub->os_partial_scan = 1;
 663                 sf->sf_flags |= SF_AUTO;
 664         } else if (sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT |
 665                                    SF_UPGRADE)) {
 666                 scrub->os_full_speed = 1;
 667                 scrub->os_partial_scan = 0;
 668         } else {
 669                 scrub->os_full_speed = 0;
 670                 scrub->os_partial_scan = 0;
 671         }
 672
 673         spin_lock(&scrub->os_lock);
 674         scrub->os_in_prior = 0;
 675         scrub->os_waiting = 0;
 676         scrub->os_paused = 0;
 677         scrub->os_in_join = 0;
 678         scrub->os_full_scrub = 0;
 679         spin_unlock(&scrub->os_lock);
 680         scrub->os_new_checked = 0;
 681         if (drop_dryrun && sf->sf_pos_first_inconsistent != 0)
 682                 sf->sf_pos_latest_start = sf->sf_pos_first_inconsistent;
 683         else if (sf->sf_pos_last_checkpoint != 0)
 684                 sf->sf_pos_latest_start = sf->sf_pos_last_checkpoint + 1;
 685         else
 686                 sf->sf_pos_latest_start = LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
 687
 688         scrub->os_pos_current = sf->sf_pos_latest_start;
 689         sf->sf_status = SS_SCANNING;
 690         sf->sf_time_latest_start = cfs_time_current_sec();
 691         sf->sf_time_last_checkpoint = sf->sf_time_latest_start;
 692         sf->sf_pos_last_checkpoint = sf->sf_pos_latest_start - 1;
 693         rc = osd_scrub_file_store(scrub);
 694         if (rc == 0) {
 695                 spin_lock(&scrub->os_lock);
 696                 thread_set_flags(thread, SVC_RUNNING);
 697                 spin_unlock(&scrub->os_lock);
 698                 wake_up_all(&thread->t_ctl_waitq);
 699         }
 700         up_write(&scrub->os_rwsem);
 701
 702         RETURN(rc);
 703 }
 704
 705 static int osd_scrub_checkpoint(struct osd_scrub *scrub)
 706 {
 707         struct scrub_file *sf = &scrub->os_file;
 708         int                rc;
 709
 710         if (likely(cfs_time_before(cfs_time_current(),
 711                                    scrub->os_time_next_checkpoint) ||
 712                    scrub->os_new_checked == 0))
 713                 return 0;
 714
 715         down_write(&scrub->os_rwsem);
 716         sf->sf_items_checked += scrub->os_new_checked;
 717         scrub->os_new_checked = 0;
 718         sf->sf_pos_last_checkpoint = scrub->os_pos_current;
 719         sf->sf_time_last_checkpoint = cfs_time_current_sec();
 720         sf->sf_run_time += cfs_duration_sec(cfs_time_current() + HALF_SEC -
 721                                             scrub->os_time_last_checkpoint);
 722         rc = osd_scrub_file_store(scrub);
 723         up_write(&scrub->os_rwsem);
 724
 725         return rc;
 726 }
 727
 728 static void osd_scrub_post(struct osd_scrub *scrub, int result)
 729 {
 730         struct scrub_file *sf = &scrub->os_file;
 731         ENTRY;
 732
 733         CDEBUG(D_LFSCK, "%.16s: OI scrub post, result = %d\n",
 734                osd_scrub2name(scrub), result);
 735
 736         down_write(&scrub->os_rwsem);
 737         spin_lock(&scrub->os_lock);
 738         thread_set_flags(&scrub->os_thread, SVC_STOPPING);
 739         spin_unlock(&scrub->os_lock);
 740         if (scrub->os_new_checked > 0) {
 741                 sf->sf_items_checked += scrub->os_new_checked;
 742                 scrub->os_new_checked = 0;
 743                 sf->sf_pos_last_checkpoint = scrub->os_pos_current;
 744         }
 745         sf->sf_time_last_checkpoint = cfs_time_current_sec();
 746         if (result > 0) {
 747                 struct osd_device *dev =
 748                         container_of0(scrub, struct osd_device, od_scrub);
 749
 750                 dev->od_igif_inoi = 1;
 751                 dev->od_check_ff = 0;
 752                 sf->sf_status = SS_COMPLETED;
 753                 if (!(sf->sf_param & SP_DRYRUN)) {
 754                         memset(sf->sf_oi_bitmap, 0, SCRUB_OI_BITMAP_SIZE);
 755                         sf->sf_flags &= ~(SF_RECREATED | SF_INCONSISTENT |
 756                                           SF_UPGRADE | SF_AUTO);
 757                 }
 758                 sf->sf_time_last_complete = sf->sf_time_last_checkpoint;
 759                 sf->sf_success_count++;
 760         } else if (result == 0) {
 761                 if (scrub->os_paused)
 762                         sf->sf_status = SS_PAUSED;
 763                 else
 764                         sf->sf_status = SS_STOPPED;
 765         } else {
 766                 sf->sf_status = SS_FAILED;
 767         }
 768         sf->sf_run_time += cfs_duration_sec(cfs_time_current() + HALF_SEC -
 769                                             scrub->os_time_last_checkpoint);
 770         result = osd_scrub_file_store(scrub);
 771         up_write(&scrub->os_rwsem);
 772
 773         EXIT;
 774 }
 775
 776 /* iteration engine */
 777
 778 struct osd_iit_param {
 779         struct super_block *sb;
 780         struct buffer_head *bitmap;
 781         ldiskfs_group_t bg;
 782         __u32 gbase;
 783         __u32 offset;
 784 };
 785
 786 typedef int (*osd_iit_next_policy)(struct osd_thread_info *info,
 787                                    struct osd_device *dev,
 788                                    struct osd_iit_param *param,
 789                                    struct osd_idmap_cache **oic,
 790                                    const bool noslot);
 791
 792 typedef int (*osd_iit_exec_policy)(struct osd_thread_info *info,
 793                                    struct osd_device *dev,
 794                                    struct osd_iit_param *param,
 795                                    struct osd_idmap_cache *oic,
 796                                    bool *noslot, int rc);
 797
 798 static int osd_iit_next(struct osd_iit_param *param, __u32 *pos)
 799 {
 800         param->offset = ldiskfs_find_next_bit(param->bitmap->b_data,
 801                         LDISKFS_INODES_PER_GROUP(param->sb), param->offset);
 802         if (param->offset >= LDISKFS_INODES_PER_GROUP(param->sb)) {
 803                 *pos = 1 + (param->bg+1) * LDISKFS_INODES_PER_GROUP(param->sb);
 804                 return SCRUB_NEXT_BREAK;
 805         } else {
 806                 *pos = param->gbase + param->offset;
 807                 return 0;
 808         }
 809 }
 810
 811 /**
 812  * \retval SCRUB_NEXT_OSTOBJ_OLD: FID-on-OST
 813  * \retval 0: FID-on-MDT
 814  */
 815 static int osd_scrub_check_local_fldb(struct osd_thread_info *info,
 816                                       struct osd_device *dev,
 817                                       struct lu_fid *fid)
 818 {
 819         /* XXX: The initial OI scrub will scan the top level /O to generate
 820          *      a small local FLDB according to the <seq>. If the given FID
 821          *      is in the local FLDB, then it is FID-on-OST; otherwise it's
 822          *      quite possible for FID-on-MDT. */
 823         if (dev->od_is_ost)
 824                 return SCRUB_NEXT_OSTOBJ_OLD;
 825         else
 826                 return 0;
 827 }
 828
 829 static int osd_scrub_get_fid(struct osd_thread_info *info,
 830                              struct osd_device *dev, struct inode *inode,
 831                              struct lu_fid *fid, bool scrub)
 832 {
 833         struct lustre_mdt_attrs *lma     = &info->oti_mdt_attrs;
 834         int                      rc;
 835         bool                     has_lma = false;
 836
 837         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
 838         if (rc == 0) {
 839                 has_lma = true;
 840                 if (lma->lma_compat & LMAC_NOT_IN_OI ||
 841                     lma->lma_incompat & LMAI_AGENT)
 842                         return SCRUB_NEXT_CONTINUE;
 843
 844                 *fid = lma->lma_self_fid;
 845                 if (!scrub)
 846                         return 0;
 847
 848                 if (lma->lma_compat & LMAC_FID_ON_OST)
 849                         return SCRUB_NEXT_OSTOBJ;
 850
 851                 if (fid_is_idif(fid))
 852                         return SCRUB_NEXT_OSTOBJ_OLD;
 853
 854                 /* For local object. */
 855                 if (fid_is_internal(fid))
 856                         return 0;
 857
 858                 /* For external visible MDT-object with non-normal FID. */
 859                 if (fid_is_namespace_visible(fid) && !fid_is_norm(fid))
 860                         return 0;
 861
 862                 /* For the object with normal FID, it may be MDT-object,
 863                  * or may be 2.4 OST-object, need further distinguish.
 864                  * Fall through to next section. */
 865         }
 866
 867         if (rc == -ENODATA || rc == 0) {
 868                 rc = osd_get_idif(info, inode, &info->oti_obj_dentry, fid);
 869                 if (rc == 0) {
 870                         if (scrub)
 871                                 /* It is old 2.x (x <= 3) or 1.8 OST-object. */
 872                                 rc = SCRUB_NEXT_OSTOBJ_OLD;
 873                         return rc;
 874                 }
 875
 876                 if (rc > 0) {
 877                         if (!has_lma)
 878                                 /* It is FID-on-OST, but we do not know how
 879                                  * to generate its FID, ignore it directly. */
 880                                 rc = SCRUB_NEXT_CONTINUE;
 881                         else
 882                                 /* It is 2.4 OST-object. */
 883                                 rc = SCRUB_NEXT_OSTOBJ_OLD;
 884                         return rc;
 885                 }
 886
 887                 if (rc != -ENODATA)
 888                         return rc;
 889
 890                 if (!has_lma) {
 891                         if (dev->od_scrub.os_convert_igif) {
 892                                 lu_igif_build(fid, inode->i_ino,
 893                                               inode->i_generation);
 894                                 if (scrub)
 895                                         rc = SCRUB_NEXT_NOLMA;
 896                                 else
 897                                         rc = 0;
 898                         } else {
 899                                 /* It may be FID-on-OST, or may be FID for
 900                                  * non-MDT0, anyway, we do not know how to
 901                                  * generate its FID, ignore it directly. */
 902                                 rc = SCRUB_NEXT_CONTINUE;
 903                         }
 904                         return rc;
 905                 }
 906
 907                 /* For OI scrub case only: the object has LMA but has no ff
 908                  * (or ff crashed). It may be MDT-object, may be OST-object
 909                  * with crashed ff. The last check is local FLDB. */
 910                 rc = osd_scrub_check_local_fldb(info, dev, fid);
 911         }
 912
 913         return rc;
 914 }
 915
 916 static int osd_iit_iget(struct osd_thread_info *info, struct osd_device *dev,
 917                         struct lu_fid *fid, struct osd_inode_id *lid, __u32 pos,
 918                         struct super_block *sb, bool scrub)
 919 {
 920         struct inode *inode;
 921         int           rc;
 922         ENTRY;
 923
 924         /* Not handle the backend root object and agent parent object.
 925          * They are neither visible to namespace nor have OI mappings. */
 926         if (unlikely(pos == osd_sb(dev)->s_root->d_inode->i_ino ||
 927                      pos == osd_remote_parent_ino(dev)))
 928                 RETURN(SCRUB_NEXT_CONTINUE);
 929
 930         osd_id_gen(lid, pos, OSD_OII_NOGEN);
 931         inode = osd_iget(info, dev, lid);
 932         if (IS_ERR(inode)) {
 933                 rc = PTR_ERR(inode);
 934                 /* The inode may be removed after bitmap searching, or the
 935                  * file is new created without inode initialized yet. */
 936                 if (rc == -ENOENT || rc == -ESTALE)
 937                         RETURN(SCRUB_NEXT_CONTINUE);
 938
 939                 CDEBUG(D_LFSCK, "%.16s: fail to read inode, ino# = %u: "
 940                        "rc = %d\n", LDISKFS_SB(sb)->s_es->s_volume_name,
 941                        pos, rc);
 942                 RETURN(rc);
 943         }
 944
 945         if (scrub &&
 946             ldiskfs_test_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB)) {
 947                 /* Only skip it for the first OI scrub accessing. */
 948                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
 949                 GOTO(put, rc = SCRUB_NEXT_NOSCRUB);
 950         }
 951
 952         rc = osd_scrub_get_fid(info, dev, inode, fid, scrub);
 953
 954         GOTO(put, rc);
 955
 956 put:
 957         iput(inode);
 958         return rc;
 959 }
 960
 961 static int osd_scrub_next(struct osd_thread_info *info, struct osd_device *dev,
 962                           struct osd_iit_param *param,
 963                           struct osd_idmap_cache **oic, const bool noslot)
 964 {
 965         struct osd_scrub     *scrub  = &dev->od_scrub;
 966         struct ptlrpc_thread *thread = &scrub->os_thread;
 967         struct lu_fid        *fid;
 968         struct osd_inode_id  *lid;
 969         int                   rc;
 970
 971         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_DELAY) && cfs_fail_val > 0) {
 972                 struct l_wait_info lwi;
 973
 974                 lwi = LWI_TIMEOUT(cfs_time_seconds(cfs_fail_val), NULL, NULL);
 975                 if (likely(lwi.lwi_timeout > 0))
 976                         l_wait_event(thread->t_ctl_waitq,
 977                                 !list_empty(&scrub->os_inconsistent_items) ||
 978                                 !thread_is_running(thread),
 979                                 &lwi);
 980         }
 981
 982         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_CRASH)) {
 983                 spin_lock(&scrub->os_lock);
 984                 thread_set_flags(thread, SVC_STOPPING);
 985                 spin_unlock(&scrub->os_lock);
 986                 return SCRUB_NEXT_CRASH;
 987         }
 988
 989         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_FATAL))
 990                 return SCRUB_NEXT_FATAL;
 991
 992         if (unlikely(!thread_is_running(thread)))
 993                 return SCRUB_NEXT_EXIT;
 994
 995         if (!list_empty(&scrub->os_inconsistent_items)) {
 996                 struct osd_inconsistent_item *oii;
 997
 998                 oii = list_entry(scrub->os_inconsistent_items.next,
 999                                  struct osd_inconsistent_item, oii_list);
1000                 *oic = &oii->oii_cache;
1001                 scrub->os_in_prior = 1;
1002                 return 0;
1003         }
1004
1005         if (noslot)
1006                 return SCRUB_NEXT_WAIT;
1007
1008         rc = osd_iit_next(param, &scrub->os_pos_current);
1009         if (rc != 0)
1010                 return rc;
1011
1012         *oic = &scrub->os_oic;
1013         fid = &(*oic)->oic_fid;
1014         lid = &(*oic)->oic_lid;
1015         rc = osd_iit_iget(info, dev, fid, lid,
1016                           scrub->os_pos_current, param->sb, true);
1017         return rc;
1018 }
1019
1020 static int osd_preload_next(struct osd_thread_info *info,
1021                             struct osd_device *dev, struct osd_iit_param *param,
1022                             struct osd_idmap_cache **oic, const bool noslot)
1023 {
1024         struct osd_otable_cache *ooc    = &dev->od_otable_it->ooi_cache;
1025         struct osd_scrub        *scrub;
1026         struct ptlrpc_thread    *thread;
1027         int                      rc;
1028
1029         rc = osd_iit_next(param, &ooc->ooc_pos_preload);
1030         if (rc != 0)
1031                 return rc;
1032
1033         scrub = &dev->od_scrub;
1034         thread = &scrub->os_thread;
1035         if (thread_is_running(thread) &&
1036             ooc->ooc_pos_preload >= scrub->os_pos_current)
1037                 return SCRUB_NEXT_EXIT;
1038
1039         rc = osd_iit_iget(info, dev,
1040                           &ooc->ooc_cache[ooc->ooc_producer_idx].oic_fid,
1041                           &ooc->ooc_cache[ooc->ooc_producer_idx].oic_lid,
1042                           ooc->ooc_pos_preload, param->sb, false);
1043         /* If succeed, it needs to move forward; otherwise up layer LFSCK may
1044          * ignore the failure, so it still need to skip the inode next time. */
1045         ooc->ooc_pos_preload = param->gbase + ++(param->offset);
1046         return rc;
1047 }
1048
1049 static inline int
1050 osd_scrub_wakeup(struct osd_scrub *scrub, struct osd_otable_it *it)
1051 {
1052         spin_lock(&scrub->os_lock);
1053         if (osd_scrub_has_window(scrub, &it->ooi_cache) ||
1054             !list_empty(&scrub->os_inconsistent_items) ||
1055             it->ooi_waiting || !thread_is_running(&scrub->os_thread))
1056                 scrub->os_waiting = 0;
1057         else
1058                 scrub->os_waiting = 1;
1059         spin_unlock(&scrub->os_lock);
1060
1061         return !scrub->os_waiting;
1062 }
1063
1064 static int osd_scrub_exec(struct osd_thread_info *info, struct osd_device *dev,
1065                           struct osd_iit_param *param,
1066                           struct osd_idmap_cache *oic, bool *noslot, int rc)
1067 {
1068         struct l_wait_info       lwi    = { 0 };
1069         struct osd_scrub        *scrub  = &dev->od_scrub;
1070         struct scrub_file       *sf     = &scrub->os_file;
1071         struct ptlrpc_thread    *thread = &scrub->os_thread;
1072         struct osd_otable_it    *it     = dev->od_otable_it;
1073         struct osd_otable_cache *ooc    = it ? &it->ooi_cache : NULL;
1074
1075         switch (rc) {
1076         case SCRUB_NEXT_CONTINUE:
1077                 goto next;
1078         case SCRUB_NEXT_WAIT:
1079                 goto wait;
1080         case SCRUB_NEXT_NOSCRUB:
1081                 down_write(&scrub->os_rwsem);
1082                 scrub->os_new_checked++;
1083                 sf->sf_items_noscrub++;
1084                 up_write(&scrub->os_rwsem);
1085                 goto next;
1086         }
1087
1088         rc = osd_scrub_check_update(info, dev, oic, rc);
1089         if (rc != 0)
1090                 return rc;
1091
1092         rc = osd_scrub_checkpoint(scrub);
1093         if (rc != 0) {
1094                 CDEBUG(D_LFSCK, "%.16s: fail to checkpoint, pos = %u: "
1095                        "rc = %d\n", osd_scrub2name(scrub),
1096                        scrub->os_pos_current, rc);
1097                 /* Continue, as long as the scrub itself can go ahead. */
1098         }
1099
1100         if (scrub->os_in_prior) {
1101                 scrub->os_in_prior = 0;
1102                 return 0;
1103         }
1104
1105 next:
1106         scrub->os_pos_current = param->gbase + ++(param->offset);
1107
1108 wait:
1109         if (it != NULL && it->ooi_waiting && ooc != NULL &&
1110             ooc->ooc_pos_preload < scrub->os_pos_current) {
1111                 spin_lock(&scrub->os_lock);
1112                 it->ooi_waiting = 0;
1113                 wake_up_all(&thread->t_ctl_waitq);
1114                 spin_unlock(&scrub->os_lock);
1115         }
1116
1117         if (scrub->os_full_speed || rc == SCRUB_NEXT_CONTINUE)
1118                 return 0;
1119
1120         if (ooc != NULL && osd_scrub_has_window(scrub, ooc)) {
1121                 *noslot = false;
1122                 return 0;
1123         }
1124
1125         if (it != NULL)
1126                 l_wait_event(thread->t_ctl_waitq, osd_scrub_wakeup(scrub, it),
1127                              &lwi);
1128
1129         if (ooc != NULL && osd_scrub_has_window(scrub, ooc))
1130                 *noslot = false;
1131         else
1132                 *noslot = true;
1133         return 0;
1134 }
1135
1136 static int osd_preload_exec(struct osd_thread_info *info,
1137                             struct osd_device *dev, struct osd_iit_param *param,
1138                             struct osd_idmap_cache *oic, bool *noslot, int rc)
1139 {
1140         struct osd_otable_cache *ooc = &dev->od_otable_it->ooi_cache;
1141
1142         if (rc == 0) {
1143                 ooc->ooc_cached_items++;
1144                 ooc->ooc_producer_idx = (ooc->ooc_producer_idx + 1) &
1145                                         ~OSD_OTABLE_IT_CACHE_MASK;
1146         }
1147         return rc > 0 ? 0 : rc;
1148 }
1149
1150 #define SCRUB_IT_ALL    1
1151 #define SCRUB_IT_CRASH  2
1152
1153 static void osd_scrub_join(struct osd_device *dev, __u32 flags,
1154                            bool inconsistent)
1155 {
1156         struct osd_scrub     *scrub  = &dev->od_scrub;
1157         struct ptlrpc_thread *thread = &scrub->os_thread;
1158         struct scrub_file    *sf     = &scrub->os_file;
1159         int                   rc;
1160         ENTRY;
1161
1162         LASSERT(!(flags & SS_AUTO_PARTIAL));
1163
1164         down_write(&scrub->os_rwsem);
1165         scrub->os_in_join = 1;
1166         if (flags & SS_SET_FAILOUT)
1167                 sf->sf_param |= SP_FAILOUT;
1168         else if (flags & SS_CLEAR_FAILOUT)
1169                 sf->sf_param &= ~SP_FAILOUT;
1170
1171         if (flags & SS_SET_DRYRUN)
1172                 sf->sf_param |= SP_DRYRUN;
1173         else if (flags & SS_CLEAR_DRYRUN)
1174                 sf->sf_param &= ~SP_DRYRUN;
1175
1176         if (flags & SS_RESET) {
1177                 osd_scrub_file_reset(scrub,
1178                         LDISKFS_SB(osd_sb(dev))->s_es->s_uuid,
1179                         inconsistent ? SF_INCONSISTENT : 0);
1180                 sf->sf_status = SS_SCANNING;
1181         }
1182
1183         if (flags & SS_AUTO_FULL) {
1184                 sf->sf_flags |= SF_AUTO;
1185                 scrub->os_full_speed = 1;
1186         }
1187
1188         if (sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT | SF_UPGRADE))
1189                 scrub->os_full_speed = 1;
1190         else
1191                 scrub->os_full_speed = 0;
1192
1193         scrub->os_new_checked = 0;
1194         if (sf->sf_pos_last_checkpoint != 0)
1195                 sf->sf_pos_latest_start = sf->sf_pos_last_checkpoint + 1;
1196         else
1197                 sf->sf_pos_latest_start = LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
1198
1199         scrub->os_pos_current = sf->sf_pos_latest_start;
1200         sf->sf_time_latest_start = cfs_time_current_sec();
1201         sf->sf_time_last_checkpoint = sf->sf_time_latest_start;
1202         sf->sf_pos_last_checkpoint = sf->sf_pos_latest_start - 1;
1203         rc = osd_scrub_file_store(scrub);
1204         if (rc != 0)
1205                 CDEBUG(D_LFSCK, "%.16s: fail to store scrub file when join "
1206                        "the OI scrub: rc = %d\n", osd_scrub2name(scrub), rc);
1207
1208         spin_lock(&scrub->os_lock);
1209         scrub->os_waiting = 0;
1210         scrub->os_paused = 0;
1211         scrub->os_partial_scan = 0;
1212         scrub->os_in_join = 0;
1213         scrub->os_full_scrub = 0;
1214         spin_unlock(&scrub->os_lock);
1215         wake_up_all(&thread->t_ctl_waitq);
1216         up_write(&scrub->os_rwsem);
1217
1218         EXIT;
1219 }
1220
1221 static int osd_inode_iteration(struct osd_thread_info *info,
1222                                struct osd_device *dev, __u32 max, bool preload)
1223 {
1224         struct osd_scrub     *scrub  = &dev->od_scrub;
1225         struct ptlrpc_thread *thread = &scrub->os_thread;
1226         struct scrub_file    *sf     = &scrub->os_file;
1227         osd_iit_next_policy   next;
1228         osd_iit_exec_policy   exec;
1229         __u32                *pos;
1230         __u32                *count;
1231         struct osd_iit_param  param  = { NULL };
1232         struct l_wait_info    lwi    = { 0 };
1233         __u32                 limit;
1234         int                   rc;
1235         bool                  noslot = true;
1236         ENTRY;
1237
1238         param.sb = osd_sb(dev);
1239         if (preload)
1240                 goto full;
1241
1242         while (scrub->os_partial_scan && !scrub->os_in_join) {
1243                 struct osd_idmap_cache *oic = NULL;
1244
1245                 rc = osd_scrub_next(info, dev, &param, &oic, noslot);
1246                 switch (rc) {
1247                 case SCRUB_NEXT_EXIT:
1248                         RETURN(0);
1249                 case SCRUB_NEXT_CRASH:
1250                         RETURN(SCRUB_IT_CRASH);
1251                 case SCRUB_NEXT_FATAL:
1252                         RETURN(-EINVAL);
1253                 case SCRUB_NEXT_WAIT: {
1254                         struct kstatfs *ksfs = &info->oti_ksfs;
1255                         __u64 saved_flags;
1256
1257                         if (dev->od_full_scrub_ratio == OFSR_NEVER ||
1258                             unlikely(sf->sf_items_updated_prior == 0))
1259                                 goto wait;
1260
1261                         if (dev->od_full_scrub_ratio == OFSR_DIRECTLY ||
1262                             scrub->os_full_scrub) {
1263                                 osd_scrub_join(dev, SS_AUTO_FULL | SS_RESET,
1264                                                true);
1265                                 goto full;
1266                         }
1267
1268                         rc = param.sb->s_op->statfs(param.sb->s_root, ksfs);
1269                         if (rc == 0) {
1270                                 __u64 used = ksfs->f_files - ksfs->f_ffree;
1271
1272                                 do_div(used, sf->sf_items_updated_prior);
1273                                 /* If we hit too much inconsistent OI
1274                                  * mappings during the partial scan,
1275                                  * then scan the device completely. */
1276                                 if (used < dev->od_full_scrub_ratio) {
1277                                         osd_scrub_join(dev,
1278                                                 SS_AUTO_FULL | SS_RESET, true);
1279                                         goto full;
1280                                 }
1281                         }
1282
1283 wait:
1284                         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_SCRUB_DELAY) &&
1285                             cfs_fail_val > 0)
1286                                 continue;
1287
1288                         saved_flags = sf->sf_flags;
1289                         sf->sf_flags &= ~(SF_RECREATED | SF_INCONSISTENT |
1290                                           SF_UPGRADE | SF_AUTO);
1291                         sf->sf_status = SS_COMPLETED;
1292                         l_wait_event(thread->t_ctl_waitq,
1293                                      !thread_is_running(thread) ||
1294                                      !scrub->os_partial_scan ||
1295                                      scrub->os_in_join ||
1296                                      !list_empty(&scrub->os_inconsistent_items),
1297                                      &lwi);
1298                         sf->sf_flags = saved_flags;
1299                         sf->sf_status = SS_SCANNING;
1300
1301                         if (unlikely(!thread_is_running(thread)))
1302                                 RETURN(0);
1303
1304                         if (!scrub->os_partial_scan || scrub->os_in_join)
1305                                 goto full;
1306
1307                         continue;
1308                 }
1309                 default:
1310                         LASSERTF(rc == 0, "rc = %d\n", rc);
1311
1312                         osd_scrub_exec(info, dev, &param, oic, &noslot, rc);
1313                         break;
1314                 }
1315         }
1316
1317 full:
1318         if (!preload) {
1319                 l_wait_event(thread->t_ctl_waitq,
1320                              !thread_is_running(thread) || !scrub->os_in_join,
1321                              &lwi);
1322
1323                 if (unlikely(!thread_is_running(thread)))
1324                         RETURN(0);
1325         }
1326
1327         noslot = false;
1328         if (!preload) {
1329                 next = osd_scrub_next;
1330                 exec = osd_scrub_exec;
1331                 pos = &scrub->os_pos_current;
1332                 count = &scrub->os_new_checked;
1333         } else {
1334                 struct osd_otable_cache *ooc = &dev->od_otable_it->ooi_cache;
1335
1336                 next = osd_preload_next;
1337                 exec = osd_preload_exec;
1338                 pos = &ooc->ooc_pos_preload;
1339                 count = &ooc->ooc_cached_items;
1340         }
1341         limit = le32_to_cpu(LDISKFS_SB(param.sb)->s_es->s_inodes_count);
1342
1343         while (*pos <= limit && *count < max) {
1344                 struct osd_idmap_cache *oic = NULL;
1345                 struct ldiskfs_group_desc *desc;
1346
1347                 param.bg = (*pos - 1) / LDISKFS_INODES_PER_GROUP(param.sb);
1348                 desc = ldiskfs_get_group_desc(param.sb, param.bg, NULL);
1349                 if (desc == NULL)
1350                         RETURN(-EIO);
1351
1352                 ldiskfs_lock_group(param.sb, param.bg);
1353                 if (desc->bg_flags & cpu_to_le16(LDISKFS_BG_INODE_UNINIT)) {
1354                         ldiskfs_unlock_group(param.sb, param.bg);
1355                         *pos = 1 + (param.bg + 1) *
1356                                 LDISKFS_INODES_PER_GROUP(param.sb);
1357                         continue;
1358                 }
1359                 ldiskfs_unlock_group(param.sb, param.bg);
1360
1361                 param.offset = (*pos - 1) % LDISKFS_INODES_PER_GROUP(param.sb);
1362                 param.gbase = 1 + param.bg * LDISKFS_INODES_PER_GROUP(param.sb);
1363                 param.bitmap = ldiskfs_read_inode_bitmap(param.sb, param.bg);
1364                 if (param.bitmap == NULL) {
1365                         CDEBUG(D_LFSCK, "%.16s: fail to read bitmap for %u, "
1366                                "scrub will stop, urgent mode\n",
1367                                osd_scrub2name(scrub), (__u32)param.bg);
1368                         RETURN(-EIO);
1369                 }
1370
1371                 while (param.offset < LDISKFS_INODES_PER_GROUP(param.sb) &&
1372                        *count < max) {
1373                         if (param.offset +
1374                                 ldiskfs_itable_unused_count(param.sb, desc) >
1375                             LDISKFS_INODES_PER_GROUP(param.sb))
1376                                 goto next_group;
1377
1378                         rc = next(info, dev, &param, &oic, noslot);
1379                         switch (rc) {
1380                         case SCRUB_NEXT_BREAK:
1381                                 goto next_group;
1382                         case SCRUB_NEXT_EXIT:
1383                                 brelse(param.bitmap);
1384                                 RETURN(0);
1385                         case SCRUB_NEXT_CRASH:
1386                                 brelse(param.bitmap);
1387                                 RETURN(SCRUB_IT_CRASH);
1388                         case SCRUB_NEXT_FATAL:
1389                                 brelse(param.bitmap);
1390                                 RETURN(-EINVAL);
1391                         }
1392
1393                         rc = exec(info, dev, &param, oic, &noslot, rc);
1394                         if (rc != 0) {
1395                                 brelse(param.bitmap);
1396                                 RETURN(rc);
1397                         }
1398                 }
1399
1400 next_group:
1401                 brelse(param.bitmap);
1402         }
1403
1404         if (*pos > limit)
1405                 RETURN(SCRUB_IT_ALL);
1406         RETURN(0);
1407 }
1408
1409 static int osd_otable_it_preload(const struct lu_env *env,
1410                                  struct osd_otable_it *it)
1411 {
1412         struct osd_device       *dev   = it->ooi_dev;
1413         struct osd_scrub        *scrub = &dev->od_scrub;
1414         struct osd_otable_cache *ooc   = &it->ooi_cache;
1415         int                      rc;
1416         ENTRY;
1417
1418         rc = osd_inode_iteration(osd_oti_get(env), dev,
1419                                  OSD_OTABLE_IT_CACHE_SIZE, true);
1420         if (rc == SCRUB_IT_ALL)
1421                 it->ooi_all_cached = 1;
1422
1423         if (scrub->os_waiting && osd_scrub_has_window(scrub, ooc)) {
1424                 spin_lock(&scrub->os_lock);
1425                 scrub->os_waiting = 0;
1426                 wake_up_all(&scrub->os_thread.t_ctl_waitq);
1427                 spin_unlock(&scrub->os_lock);
1428         }
1429
1430         RETURN(rc < 0 ? rc : ooc->ooc_cached_items);
1431 }
1432
1433 static int osd_scrub_main(void *args)
1434 {
1435         struct lu_env         env;
1436         struct osd_device    *dev    = (struct osd_device *)args;
1437         struct osd_scrub     *scrub  = &dev->od_scrub;
1438         struct ptlrpc_thread *thread = &scrub->os_thread;
1439         int                   rc;
1440         ENTRY;
1441
1442         rc = lu_env_init(&env, LCT_LOCAL);
1443         if (rc != 0) {
1444                 CDEBUG(D_LFSCK, "%.16s: OI scrub fail to init env: rc = %d\n",
1445                        osd_scrub2name(scrub), rc);
1446                 GOTO(noenv, rc);
1447         }
1448
1449         rc = osd_scrub_prep(dev);
1450         if (rc != 0) {
1451                 CDEBUG(D_LFSCK, "%.16s: OI scrub fail to scrub prep: rc = %d\n",
1452                        osd_scrub2name(scrub), rc);
1453                 GOTO(out, rc);
1454         }
1455
1456         if (!scrub->os_full_speed && !scrub->os_partial_scan) {
1457                 struct l_wait_info lwi = { 0 };
1458                 struct osd_otable_it *it = dev->od_otable_it;
1459                 struct osd_otable_cache *ooc = &it->ooi_cache;
1460
1461                 l_wait_event(thread->t_ctl_waitq,
1462                              it->ooi_user_ready || !thread_is_running(thread),
1463                              &lwi);
1464                 if (unlikely(!thread_is_running(thread)))
1465                         GOTO(post, rc = 0);
1466
1467                 scrub->os_pos_current = ooc->ooc_pos_preload;
1468         }
1469
1470         CDEBUG(D_LFSCK, "%.16s: OI scrub start, flags = 0x%x, pos = %u\n",
1471                osd_scrub2name(scrub), scrub->os_start_flags,
1472                scrub->os_pos_current);
1473
1474         rc = osd_inode_iteration(osd_oti_get(&env), dev, ~0U, false);
1475         if (unlikely(rc == SCRUB_IT_CRASH))
1476                 GOTO(out, rc = -EINVAL);
1477         GOTO(post, rc);
1478
1479 post:
1480         osd_scrub_post(scrub, rc);
1481         CDEBUG(D_LFSCK, "%.16s: OI scrub: stop, pos = %u: rc = %d\n",
1482                osd_scrub2name(scrub), scrub->os_pos_current, rc);
1483
1484 out:
1485         while (!list_empty(&scrub->os_inconsistent_items)) {
1486                 struct osd_inconsistent_item *oii;
1487
1488                 oii = list_entry(scrub->os_inconsistent_items.next,
1489                                      struct osd_inconsistent_item, oii_list);
1490                 list_del_init(&oii->oii_list);
1491                 OBD_FREE_PTR(oii);
1492         }
1493         lu_env_fini(&env);
1494
1495 noenv:
1496         spin_lock(&scrub->os_lock);
1497         thread_set_flags(thread, SVC_STOPPED);
1498         wake_up_all(&thread->t_ctl_waitq);
1499         spin_unlock(&scrub->os_lock);
1500         return rc;
1501 }
1502
1503 /* initial OI scrub */
1504
1505 typedef int (*scandir_t)(struct osd_thread_info *, struct osd_device *,
1506                          struct dentry *, filldir_t filldir);
1507
1508 static int osd_ios_varfid_fill(void *buf, const char *name, int namelen,
1509                                loff_t offset, __u64 ino, unsigned d_type);
1510 static int osd_ios_lf_fill(void *buf, const char *name, int namelen,
1511                            loff_t offset, __u64 ino, unsigned d_type);
1512 static int osd_ios_dl_fill(void *buf, const char *name, int namelen,
1513                            loff_t offset, __u64 ino, unsigned d_type);
1514
1515 static int
1516 osd_ios_general_scan(struct osd_thread_info *info, struct osd_device *dev,
1517                      struct dentry *dentry, filldir_t filldir);
1518 static int
1519 osd_ios_ROOT_scan(struct osd_thread_info *info, struct osd_device *dev,
1520                   struct dentry *dentry, filldir_t filldir);
1521
1522 static int
1523 osd_ios_OBJECTS_scan(struct osd_thread_info *info, struct osd_device *dev,
1524                      struct dentry *dentry, filldir_t filldir);
1525
1526 enum osd_lf_flags {
1527         OLF_SCAN_SUBITEMS       = 0x0001,
1528         OLF_HIDE_FID            = 0x0002,
1529         OLF_SHOW_NAME           = 0x0004,
1530         OLF_NO_OI               = 0x0008,
1531 };
1532
1533 struct osd_lf_map {
1534         char            *olm_name;
1535         struct lu_fid    olm_fid;
1536         __u16            olm_flags;
1537         scandir_t        olm_scandir;
1538         filldir_t        olm_filldir;
1539 };
1540
1541 /* Add the new introduced local files in the list in the future. */
1542 static const struct osd_lf_map osd_lf_maps[] = {
1543         /* CATALOGS */
1544         { CATLIST, { FID_SEQ_LOCAL_FILE, LLOG_CATALOGS_OID, 0 }, OLF_SHOW_NAME,
1545                 NULL, NULL },
1546
1547         /* CONFIGS */
1548         { MOUNT_CONFIGS_DIR, { FID_SEQ_LOCAL_FILE, MGS_CONFIGS_OID, 0 },
1549                 OLF_SCAN_SUBITEMS, osd_ios_general_scan,
1550                 osd_ios_varfid_fill },
1551
1552         /* NIDTBL_VERSIONS */
1553         { MGS_NIDTBL_DIR, { 0, 0, 0 }, OLF_SCAN_SUBITEMS,
1554                 osd_ios_general_scan, osd_ios_varfid_fill },
1555
1556         /* PENDING */
1557         { "PENDING", { 0, 0, 0 }, 0, NULL, NULL },
1558
1559         /* ROOT */
1560         { "ROOT", { FID_SEQ_ROOT, FID_OID_ROOT, 0 },
1561                 OLF_SCAN_SUBITEMS | OLF_HIDE_FID, osd_ios_ROOT_scan, NULL },
1562
1563         /* changelog_catalog */
1564         { CHANGELOG_CATALOG, { 0, 0, 0 }, 0, NULL, NULL },
1565
1566         /* changelog_users */
1567         { CHANGELOG_USERS, { 0, 0, 0 }, 0, NULL, NULL },
1568
1569         /* fld */
1570         { "fld", { FID_SEQ_LOCAL_FILE, FLD_INDEX_OID, 0 }, OLF_SHOW_NAME,
1571                 NULL, NULL },
1572
1573         /* last_rcvd */
1574         { LAST_RCVD, { FID_SEQ_LOCAL_FILE, LAST_RECV_OID, 0 }, OLF_SHOW_NAME,
1575                 NULL, NULL },
1576
1577         /* lfsck_bookmark */
1578         { "lfsck_bookmark", { 0, 0, 0 }, 0, NULL, NULL },
1579
1580         /* lov_objid */
1581         { LOV_OBJID, { FID_SEQ_LOCAL_FILE, MDD_LOV_OBJ_OID, 0 }, OLF_SHOW_NAME,
1582                 NULL, NULL },
1583
1584         /* lov_objseq */
1585         { LOV_OBJSEQ, { FID_SEQ_LOCAL_FILE, MDD_LOV_OBJ_OSEQ, 0 },
1586                 OLF_SHOW_NAME, NULL, NULL },
1587
1588         /* quota_master */
1589         { QMT_DIR, { 0, 0, 0 }, OLF_SCAN_SUBITEMS,
1590                 osd_ios_general_scan, osd_ios_varfid_fill },
1591
1592         /* quota_slave */
1593         { QSD_DIR, { 0, 0, 0 }, OLF_SCAN_SUBITEMS,
1594                 osd_ios_general_scan, osd_ios_varfid_fill },
1595
1596         /* seq_ctl */
1597         { "seq_ctl", { FID_SEQ_LOCAL_FILE, FID_SEQ_CTL_OID, 0 },
1598                 OLF_SHOW_NAME, NULL, NULL },
1599
1600         /* seq_srv */
1601         { "seq_srv", { FID_SEQ_LOCAL_FILE, FID_SEQ_SRV_OID, 0 },
1602                 OLF_SHOW_NAME, NULL, NULL },
1603
1604         /* health_check */
1605         { HEALTH_CHECK, { FID_SEQ_LOCAL_FILE, OFD_HEALTH_CHECK_OID, 0 },
1606                 OLF_SHOW_NAME, NULL, NULL },
1607
1608         /* lfsck_namespace */
1609         { "lfsck_namespace", { 0, 0, 0 }, 0, NULL, NULL },
1610
1611         /* OBJECTS, upgrade from old device */
1612         { OBJECTS, { 0, 0, 0 }, OLF_SCAN_SUBITEMS, osd_ios_OBJECTS_scan, NULL },
1613
1614         /* lquota_v2.user, upgrade from old device */
1615         { "lquota_v2.user", { 0, 0, 0 }, 0, NULL, NULL },
1616
1617         /* lquota_v2.group, upgrade from old device */
1618         { "lquota_v2.group", { 0, 0, 0 }, 0, NULL, NULL },
1619
1620         /* LAST_GROUP, upgrade from old device */
1621         { "LAST_GROUP", { FID_SEQ_LOCAL_FILE, OFD_LAST_GROUP_OID, 0 },
1622                 OLF_SHOW_NAME, NULL, NULL },
1623
1624         /* SLAVE_LOG, llog for destroy slave stripes of striped dir */
1625         { "SLAVE_LOG", { FID_SEQ_LOCAL_FILE, SLAVE_LLOG_CATALOGS_OID, 0 },
1626                OLF_SHOW_NAME, NULL, NULL },
1627
1628         /* lost+found */
1629         { "lost+found", { FID_SEQ_LOCAL_FILE, OSD_LPF_OID, 0 },
1630                 OLF_SCAN_SUBITEMS, osd_ios_general_scan, osd_ios_lf_fill },
1631
1632         { NULL, { 0, 0, 0 }, 0, NULL, NULL }
1633 };
1634
1635 /* Add the new introduced files under .lustre/ in the list in the future. */
1636 static const struct osd_lf_map osd_dl_maps[] = {
1637         /* .lustre/fid */
1638         { "fid", { FID_SEQ_DOT_LUSTRE, FID_OID_DOT_LUSTRE_OBF, 0 }, 0,
1639                 NULL, NULL },
1640
1641         /* .lustre/lost+found */
1642         { "lost+found", { FID_SEQ_DOT_LUSTRE, FID_OID_DOT_LUSTRE_LPF, 0 }, 0,
1643                 NULL, NULL },
1644
1645         { NULL, { 0, 0, 0 }, 0, NULL, NULL }
1646 };
1647
1648 struct osd_ios_item {
1649         struct list_head oii_list;
1650         struct dentry   *oii_dentry;
1651         scandir_t        oii_scandir;
1652         filldir_t        oii_filldir;
1653 };
1654
1655 struct osd_ios_filldir_buf {
1656 #ifdef HAVE_DIR_CONTEXT
1657         /* please keep it as first member */
1658         struct dir_context       ctx;
1659 #endif
1660         struct osd_thread_info  *oifb_info;
1661         struct osd_device       *oifb_dev;
1662         struct dentry           *oifb_dentry;
1663 };
1664
1665 static inline struct dentry *
1666 osd_ios_lookup_one_len(const char *name, struct dentry *parent, int namelen)
1667 {
1668         struct dentry *dentry;
1669
1670         dentry = ll_lookup_one_len(name, parent, namelen);
1671         if (!IS_ERR(dentry) && dentry->d_inode == NULL) {
1672                 dput(dentry);
1673                 return ERR_PTR(-ENOENT);
1674         }
1675
1676         return dentry;
1677 }
1678
1679 static int
1680 osd_ios_new_item(struct osd_device *dev, struct dentry *dentry,
1681                  scandir_t scandir, filldir_t filldir)
1682 {
1683         struct osd_ios_item *item;
1684         ENTRY;
1685
1686         OBD_ALLOC_PTR(item);
1687         if (item == NULL)
1688                 RETURN(-ENOMEM);
1689
1690         INIT_LIST_HEAD(&item->oii_list);
1691         item->oii_dentry = dget(dentry);
1692         item->oii_scandir = scandir;
1693         item->oii_filldir = filldir;
1694         list_add_tail(&item->oii_list, &dev->od_ios_list);
1695
1696         RETURN(0);
1697 }
1698
1699 /**
1700  * osd_ios_scan_one() - check/fix LMA FID and OI entry for one inode
1701  *
1702  * The passed \a inode's \a fid is verified against the LMA FID. If the \a fid
1703  * is NULL or is empty the IGIF FID is used. The FID is verified in the OI to
1704  * reference the inode, or fixed if it is missing or references another inode.
1705  */
1706 static int
1707 osd_ios_scan_one(struct osd_thread_info *info, struct osd_device *dev,
1708                  struct inode *inode, const struct lu_fid *fid, int flags)
1709 {
1710         struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
1711         struct osd_inode_id     *id     = &info->oti_id;
1712         struct osd_inode_id     *id2    = &info->oti_id2;
1713         struct osd_scrub        *scrub  = &dev->od_scrub;
1714         struct scrub_file       *sf     = &scrub->os_file;
1715         struct lu_fid            tfid;
1716         int                      rc;
1717         ENTRY;
1718
1719         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
1720         if (rc != 0 && rc != -ENODATA) {
1721                 CDEBUG(D_LFSCK, "%s: fail to get lma for init OI scrub: "
1722                        "rc = %d\n", osd_name(dev), rc);
1723
1724                 RETURN(rc);
1725         }
1726
1727         osd_id_gen(id, inode->i_ino, inode->i_generation);
1728         if (rc == -ENODATA) {
1729                 if (fid == NULL || fid_is_zero(fid) || flags & OLF_HIDE_FID)
1730                         lu_igif_build(&tfid, inode->i_ino, inode->i_generation);
1731                 else
1732                         tfid = *fid;
1733                 rc = osd_ea_fid_set(info, inode, &tfid, 0, 0);
1734                 if (rc != 0) {
1735                         CDEBUG(D_LFSCK, "%s: fail to set LMA for init OI "
1736                               "scrub: rc = %d\n", osd_name(dev), rc);
1737
1738                         RETURN(rc);
1739                 }
1740         } else {
1741                 if (lma->lma_compat & LMAC_NOT_IN_OI)
1742                         RETURN(0);
1743
1744                 tfid = lma->lma_self_fid;
1745         }
1746
1747         rc = osd_oi_lookup(info, dev, &tfid, id2, 0);
1748         if (rc != 0) {
1749                 if (rc != -ENOENT)
1750                         RETURN(rc);
1751
1752                 rc = osd_scrub_refresh_mapping(info, dev, &tfid, id,
1753                                                DTO_INDEX_INSERT, true, 0);
1754                 if (rc > 0)
1755                         rc = 0;
1756
1757                 RETURN(rc);
1758         }
1759
1760         if (osd_id_eq_strict(id, id2))
1761                 RETURN(0);
1762
1763         if (!(sf->sf_flags & SF_INCONSISTENT)) {
1764                 osd_scrub_file_reset(scrub,
1765                                      LDISKFS_SB(osd_sb(dev))->s_es->s_uuid,
1766                                      SF_INCONSISTENT);
1767                 rc = osd_scrub_file_store(scrub);
1768                 if (rc != 0)
1769                         RETURN(rc);
1770         }
1771
1772         rc = osd_scrub_refresh_mapping(info, dev, &tfid, id,
1773                                        DTO_INDEX_UPDATE, true, 0);
1774         if (rc > 0)
1775                 rc = 0;
1776
1777         RETURN(rc);
1778 }
1779
1780 /**
1781  * It scans the /lost+found, and for the OST-object (with filter_fid
1782  * or filter_fid_old), move them back to its proper /O/<seq>/d<x>.
1783  */
1784 static int osd_ios_lf_fill(void *buf, const char *name, int namelen,
1785                            loff_t offset, __u64 ino, unsigned d_type)
1786 {
1787         struct osd_ios_filldir_buf *fill_buf = buf;
1788         struct osd_thread_info     *info     = fill_buf->oifb_info;
1789         struct osd_device          *dev      = fill_buf->oifb_dev;
1790         struct lu_fid              *fid      = &info->oti_fid;
1791         struct osd_scrub           *scrub    = &dev->od_scrub;
1792         struct dentry              *parent   = fill_buf->oifb_dentry;
1793         struct dentry              *child;
1794         struct inode               *dir      = parent->d_inode;
1795         struct inode               *inode;
1796         int                         rc;
1797         ENTRY;
1798
1799         /* skip any '.' started names */
1800         if (name[0] == '.')
1801                 RETURN(0);
1802
1803         scrub->os_lf_scanned++;
1804         child = osd_ios_lookup_one_len(name, parent, namelen);
1805         if (IS_ERR(child)) {
1806                 CDEBUG(D_LFSCK, "%s: cannot lookup child '%.*s': rc = %d\n",
1807                       osd_name(dev), namelen, name, (int)PTR_ERR(child));
1808                 RETURN(0);
1809         }
1810
1811         inode = child->d_inode;
1812         if (S_ISDIR(inode->i_mode)) {
1813                 rc = osd_ios_new_item(dev, child, osd_ios_general_scan,
1814                                       osd_ios_lf_fill);
1815                 if (rc != 0)
1816                         CDEBUG(D_LFSCK, "%s: cannot add child '%.*s': "
1817                               "rc = %d\n", osd_name(dev), namelen, name, rc);
1818                 GOTO(put, rc);
1819         }
1820
1821         if (!S_ISREG(inode->i_mode))
1822                 GOTO(put, rc = 0);
1823
1824         rc = osd_scrub_get_fid(info, dev, inode, fid, true);
1825         if (rc == SCRUB_NEXT_OSTOBJ || rc == SCRUB_NEXT_OSTOBJ_OLD) {
1826                 rc = osd_obj_map_recover(info, dev, dir, child, fid);
1827                 if (rc == 0) {
1828                         CDEBUG(D_LFSCK, "recovered '%.*s' ["DFID"] from "
1829                                "/lost+found.\n", namelen, name, PFID(fid));
1830                         scrub->os_lf_repaired++;
1831                 } else {
1832                         CDEBUG(D_LFSCK, "%s: cannot rename for '%.*s' "
1833                                DFID": rc = %d\n",
1834                                osd_name(dev), namelen, name, PFID(fid), rc);
1835                 }
1836         }
1837
1838         /* XXX: For MDT-objects, we can move them from /lost+found to namespace
1839          *      visible place, such as the /ROOT/.lustre/lost+found, then LFSCK
1840          *      can process them in furtuer. */
1841
1842         GOTO(put, rc);
1843
1844 put:
1845         if (rc < 0)
1846                 scrub->os_lf_failed++;
1847         dput(child);
1848         /* skip the failure to make the scanning to continue. */
1849         return 0;
1850 }
1851
1852 static int osd_ios_varfid_fill(void *buf, const char *name, int namelen,
1853                                loff_t offset, __u64 ino, unsigned d_type)
1854 {
1855         struct osd_ios_filldir_buf *fill_buf = buf;
1856         struct osd_device          *dev      = fill_buf->oifb_dev;
1857         struct dentry              *child;
1858         int                         rc;
1859         ENTRY;
1860
1861         /* skip any '.' started names */
1862         if (name[0] == '.')
1863                 RETURN(0);
1864
1865         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
1866         if (IS_ERR(child))
1867                 RETURN(PTR_ERR(child));
1868
1869         rc = osd_ios_scan_one(fill_buf->oifb_info, dev, child->d_inode,
1870                               NULL, 0);
1871         if (rc == 0 && S_ISDIR(child->d_inode->i_mode))
1872                 rc = osd_ios_new_item(dev, child, osd_ios_general_scan,
1873                                       osd_ios_varfid_fill);
1874         dput(child);
1875
1876         RETURN(rc);
1877 }
1878
1879 static int osd_ios_dl_fill(void *buf, const char *name, int namelen,
1880                            loff_t offset, __u64 ino, unsigned d_type)
1881 {
1882         struct osd_ios_filldir_buf *fill_buf = buf;
1883         struct osd_device          *dev      = fill_buf->oifb_dev;
1884         const struct osd_lf_map    *map;
1885         struct dentry              *child;
1886         int                         rc       = 0;
1887         ENTRY;
1888
1889         /* skip any '.' started names */
1890         if (name[0] == '.')
1891                 RETURN(0);
1892
1893         for (map = osd_dl_maps; map->olm_name != NULL; map++) {
1894                 if (strlen(map->olm_name) != namelen)
1895                         continue;
1896
1897                 if (strncmp(map->olm_name, name, namelen) == 0)
1898                         break;
1899         }
1900
1901         if (map->olm_name == NULL)
1902                 RETURN(0);
1903
1904         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
1905         if (IS_ERR(child))
1906                 RETURN(PTR_ERR(child));
1907
1908         rc = osd_ios_scan_one(fill_buf->oifb_info, dev, child->d_inode,
1909                               &map->olm_fid, map->olm_flags);
1910         dput(child);
1911
1912         RETURN(rc);
1913 }
1914
1915 static int osd_ios_root_fill(void *buf, const char *name, int namelen,
1916                              loff_t offset, __u64 ino, unsigned d_type)
1917 {
1918         struct osd_ios_filldir_buf *fill_buf = buf;
1919         struct osd_device          *dev      = fill_buf->oifb_dev;
1920         const struct osd_lf_map    *map;
1921         struct dentry              *child;
1922         int                         rc       = 0;
1923         ENTRY;
1924
1925         /* skip any '.' started names */
1926         if (name[0] == '.')
1927                 RETURN(0);
1928
1929         for (map = osd_lf_maps; map->olm_name != NULL; map++) {
1930                 if (strlen(map->olm_name) != namelen)
1931                         continue;
1932
1933                 if (strncmp(map->olm_name, name, namelen) == 0)
1934                         break;
1935         }
1936
1937         if (map->olm_name == NULL)
1938                 RETURN(0);
1939
1940         child = osd_ios_lookup_one_len(name, fill_buf->oifb_dentry, namelen);
1941         if (IS_ERR(child))
1942                 RETURN(PTR_ERR(child));
1943
1944         if (!(map->olm_flags & OLF_NO_OI))
1945                 rc = osd_ios_scan_one(fill_buf->oifb_info, dev, child->d_inode,
1946                                       &map->olm_fid, map->olm_flags);
1947         if (rc == 0 && map->olm_flags & OLF_SCAN_SUBITEMS)
1948                 rc = osd_ios_new_item(dev, child, map->olm_scandir,
1949                                       map->olm_filldir);
1950         dput(child);
1951
1952         RETURN(rc);
1953 }
1954
1955 static int
1956 osd_ios_general_scan(struct osd_thread_info *info, struct osd_device *dev,
1957                      struct dentry *dentry, filldir_t filldir)
1958 {
1959         struct osd_ios_filldir_buf    buf   = {
1960 #ifdef HAVE_DIR_CONTEXT
1961                                                 .ctx.actor = filldir,
1962 #endif
1963                                                 .oifb_info = info,
1964                                                 .oifb_dev = dev,
1965                                                 .oifb_dentry = dentry };
1966         struct file                  *filp  = &info->oti_file;
1967         struct inode                 *inode = dentry->d_inode;
1968         const struct file_operations *fops  = inode->i_fop;
1969         int                           rc;
1970         ENTRY;
1971
1972         LASSERT(filldir != NULL);
1973
1974         filp->f_pos = 0;
1975         filp->f_dentry = dentry;
1976         filp->f_mode = FMODE_64BITHASH;
1977         filp->f_mapping = inode->i_mapping;
1978         filp->f_op = fops;
1979         filp->private_data = NULL;
1980         set_file_inode(filp, inode);
1981
1982 #ifdef HAVE_DIR_CONTEXT
1983         buf.ctx.pos = filp->f_pos;
1984         rc = fops->iterate(filp, &buf.ctx);
1985         filp->f_pos = buf.ctx.pos;
1986 #else
1987         rc = fops->readdir(filp, &buf, filldir);
1988 #endif
1989         fops->release(inode, filp);
1990
1991         RETURN(rc);
1992 }
1993
1994 static int
1995 osd_ios_ROOT_scan(struct osd_thread_info *info, struct osd_device *dev,
1996                   struct dentry *dentry, filldir_t filldir)
1997 {
1998         struct osd_scrub  *scrub  = &dev->od_scrub;
1999         struct scrub_file *sf     = &scrub->os_file;
2000         struct dentry     *child;
2001         int                rc;
2002         ENTRY;
2003
2004         /* It is existing MDT0 device. We only allow the case of object without
2005          * LMA to happen on the MDT0, which is usually for old 1.8 MDT. Then we
2006          * can generate IGIF mode FID for the object and related OI mapping. If
2007          * it is on other MDTs, then becuase file-level backup/restore, related
2008          * OI mapping may be invalid already, we do not know which is the right
2009          * FID for the object. We only allow IGIF objects to reside on the MDT0.
2010          *
2011          * XXX: For the case of object on non-MDT0 device with neither LMA nor
2012          *      "fid" xattr, then something crashed. We cannot re-generate the
2013          *      FID directly, instead, the OI scrub will scan the OI structure
2014          *      and try to re-generate the LMA from the OI mapping. But if the
2015          *      OI mapping crashed or lost also, then we have to give up under
2016          *      double failure cases. */
2017         scrub->os_convert_igif = 1;
2018         child = osd_ios_lookup_one_len(dot_lustre_name, dentry,
2019                                        strlen(dot_lustre_name));
2020         if (IS_ERR(child)) {
2021                 rc = PTR_ERR(child);
2022                 if (rc == -ENOENT) {
2023                         /* It is 1.8 MDT device. */
2024                         if (!(sf->sf_flags & SF_UPGRADE)) {
2025                                 osd_scrub_file_reset(scrub,
2026                                         LDISKFS_SB(osd_sb(dev))->s_es->s_uuid,
2027                                         SF_UPGRADE);
2028                                 sf->sf_internal_flags &= ~SIF_NO_HANDLE_OLD_FID;
2029                                 rc = osd_scrub_file_store(scrub);
2030                         } else {
2031                                 rc = 0;
2032                         }
2033                 }
2034         } else {
2035                 /* For lustre-2.x (x <= 3), the ".lustre" has NO FID-in-LMA,
2036                  * so the client will get IGIF for the ".lustre" object when
2037                  * the MDT restart.
2038                  *
2039                  * From the OI scrub view, when the MDT upgrade to Lustre-2.4,
2040                  * it does not know whether there are some old clients cached
2041                  * the ".lustre" IGIF during the upgrading. Two choices:
2042                  *
2043                  * 1) Generate IGIF-in-LMA and IGIF-in-OI for the ".lustre".
2044                  *    It will allow the old connected clients to access the
2045                  *    ".lustre" with cached IGIF. But it will cause others
2046                  *    on the MDT failed to check "fid_is_dot_lustre()".
2047                  *
2048                  * 2) Use fixed FID {FID_SEQ_DOT_LUSTRE, FID_OID_DOT_LUSTRE, 0}
2049                  *    for ".lustre" in spite of whether there are some clients
2050                  *    cached the ".lustre" IGIF or not. It enables the check
2051                  *    "fid_is_dot_lustre()" on the MDT, although it will cause
2052                  *    that the old connected clients cannot access the ".lustre"
2053                  *    with the cached IGIF.
2054                  *
2055                  * Usually, it is rare case for the old connected clients
2056                  * to access the ".lustre" with cached IGIF. So we prefer
2057                  * to the solution 2). */
2058                 rc = osd_ios_scan_one(info, dev, child->d_inode,
2059                                       &LU_DOT_LUSTRE_FID, 0);
2060                 if (rc == 0)
2061                         rc = osd_ios_new_item(dev, child, osd_ios_general_scan,
2062                                               osd_ios_dl_fill);
2063                 dput(child);
2064         }
2065
2066         RETURN(rc);
2067 }
2068
2069 static int
2070 osd_ios_OBJECTS_scan(struct osd_thread_info *info, struct osd_device *dev,
2071                      struct dentry *dentry, filldir_t filldir)
2072 {
2073         struct osd_scrub  *scrub  = &dev->od_scrub;
2074         struct scrub_file *sf     = &scrub->os_file;
2075         struct dentry     *child;
2076         int                rc;
2077         ENTRY;
2078
2079         if (unlikely(sf->sf_internal_flags & SIF_NO_HANDLE_OLD_FID)) {
2080                 sf->sf_internal_flags &= ~SIF_NO_HANDLE_OLD_FID;
2081                 rc = osd_scrub_file_store(scrub);
2082                 if (rc != 0)
2083                         RETURN(rc);
2084         }
2085
2086         child = osd_ios_lookup_one_len(ADMIN_USR, dentry, strlen(ADMIN_USR));
2087         if (!IS_ERR(child)) {
2088                 rc = osd_ios_scan_one(info, dev, child->d_inode, NULL, 0);
2089                 dput(child);
2090         } else {
2091                 rc = PTR_ERR(child);
2092         }
2093
2094         if (rc != 0 && rc != -ENOENT)
2095                 RETURN(rc);
2096
2097         child = osd_ios_lookup_one_len(ADMIN_GRP, dentry, strlen(ADMIN_GRP));
2098         if (!IS_ERR(child)) {
2099                 rc = osd_ios_scan_one(info, dev, child->d_inode, NULL, 0);
2100                 dput(child);
2101         } else {
2102                 rc = PTR_ERR(child);
2103         }
2104
2105         if (rc == -ENOENT)
2106                 rc = 0;
2107
2108         RETURN(rc);
2109 }
2110
2111 static int osd_initial_OI_scrub(struct osd_thread_info *info,
2112                                 struct osd_device *dev)
2113 {
2114         struct osd_ios_item     *item    = NULL;
2115         scandir_t                scandir = osd_ios_general_scan;
2116         filldir_t                filldir = osd_ios_root_fill;
2117         struct dentry           *dentry  = osd_sb(dev)->s_root;
2118         const struct osd_lf_map *map     = osd_lf_maps;
2119         int                      rc;
2120         ENTRY;
2121
2122         /* Lookup IGIF in OI by force for initial OI scrub. */
2123         dev->od_igif_inoi = 1;
2124
2125         while (1) {
2126                 rc = scandir(info, dev, dentry, filldir);
2127                 if (item != NULL) {
2128                         dput(item->oii_dentry);
2129                         OBD_FREE_PTR(item);
2130                 }
2131
2132                 if (rc != 0)
2133                         break;
2134
2135                 if (list_empty(&dev->od_ios_list))
2136                         break;
2137
2138                 item = list_entry(dev->od_ios_list.next,
2139                                   struct osd_ios_item, oii_list);
2140                 list_del_init(&item->oii_list);
2141
2142                 LASSERT(item->oii_scandir != NULL);
2143                 scandir = item->oii_scandir;
2144                 filldir = item->oii_filldir;
2145                 dentry = item->oii_dentry;
2146         }
2147
2148         while (!list_empty(&dev->od_ios_list)) {
2149                 item = list_entry(dev->od_ios_list.next,
2150                                   struct osd_ios_item, oii_list);
2151                 list_del_init(&item->oii_list);
2152                 dput(item->oii_dentry);
2153                 OBD_FREE_PTR(item);
2154         }
2155
2156         if (rc != 0)
2157                 RETURN(rc);
2158
2159         /* There maybe the case that the object has been removed, but its OI
2160          * mapping is still in the OI file, such as the "CATALOGS" after MDT
2161          * file-level backup/restore. So here cleanup the stale OI mappings. */
2162         while (map->olm_name != NULL) {
2163                 struct dentry *child;
2164
2165                 if (fid_is_zero(&map->olm_fid)) {
2166                         map++;
2167                         continue;
2168                 }
2169
2170                 child = osd_ios_lookup_one_len(map->olm_name,
2171                                                osd_sb(dev)->s_root,
2172                                                strlen(map->olm_name));
2173                 if (!IS_ERR(child))
2174                         dput(child);
2175                 else if (PTR_ERR(child) == -ENOENT)
2176                         osd_scrub_refresh_mapping(info, dev, &map->olm_fid,
2177                                                   NULL, DTO_INDEX_DELETE,
2178                                                   true, 0);
2179                 map++;
2180         }
2181
2182         RETURN(0);
2183 }
2184
2185 char *osd_lf_fid2name(const struct lu_fid *fid)
2186 {
2187         const struct osd_lf_map *map = osd_lf_maps;
2188
2189         while (map->olm_name != NULL) {
2190                 if (!lu_fid_eq(fid, &map->olm_fid)) {
2191                         map++;
2192                         continue;
2193                 }
2194
2195                 if (map->olm_flags & OLF_SHOW_NAME)
2196                         return map->olm_name;
2197                 else
2198                         return "";
2199         }
2200
2201         return NULL;
2202 }
2203
2204 /* OI scrub start/stop */
2205
2206 static int do_osd_scrub_start(struct osd_device *dev, __u32 flags)
2207 {
2208         struct osd_scrub     *scrub  = &dev->od_scrub;
2209         struct ptlrpc_thread *thread = &scrub->os_thread;
2210         struct l_wait_info    lwi    = { 0 };
2211         struct task_struct   *task;
2212         int                   rc;
2213         ENTRY;
2214
2215         /* os_lock: sync status between stop and scrub thread */
2216         spin_lock(&scrub->os_lock);
2217
2218 again:
2219         if (thread_is_running(thread)) {
2220                 spin_unlock(&scrub->os_lock);
2221                 if (!(scrub->os_file.sf_flags & SF_AUTO) ||
2222                      (flags & (SS_AUTO_FULL | SS_AUTO_PARTIAL)))
2223                         RETURN(-EALREADY);
2224
2225                 osd_scrub_join(dev, flags, false);
2226                 spin_lock(&scrub->os_lock);
2227                 if (!thread_is_running(thread))
2228                         goto again;
2229
2230                 spin_unlock(&scrub->os_lock);
2231                 RETURN(0);
2232         }
2233
2234         if (unlikely(thread_is_stopping(thread))) {
2235                 spin_unlock(&scrub->os_lock);
2236                 l_wait_event(thread->t_ctl_waitq,
2237                              thread_is_stopped(thread),
2238                              &lwi);
2239                 spin_lock(&scrub->os_lock);
2240                 goto again;
2241         }
2242         spin_unlock(&scrub->os_lock);
2243
2244         if (scrub->os_file.sf_status == SS_COMPLETED) {
2245                 if (!(flags & SS_SET_FAILOUT))
2246                         flags |= SS_CLEAR_FAILOUT;
2247
2248                 if (!(flags & SS_SET_DRYRUN))
2249                         flags |= SS_CLEAR_DRYRUN;
2250
2251                 flags |= SS_RESET;
2252         }
2253
2254         scrub->os_start_flags = flags;
2255         thread_set_flags(thread, 0);
2256         task = kthread_run(osd_scrub_main, dev, "OI_scrub");
2257         if (IS_ERR(task)) {
2258                 rc = PTR_ERR(task);
2259                 CERROR("%.16s: cannot start iteration thread: rc = %d\n",
2260                        osd_scrub2name(scrub), rc);
2261                 RETURN(rc);
2262         }
2263
2264         l_wait_event(thread->t_ctl_waitq,
2265                      thread_is_running(thread) || thread_is_stopped(thread),
2266                      &lwi);
2267
2268         RETURN(0);
2269 }
2270
2271 int osd_scrub_start(struct osd_device *dev, __u32 flags)
2272 {
2273         int rc;
2274         ENTRY;
2275
2276         /* od_otable_mutex: prevent curcurrent start/stop */
2277         mutex_lock(&dev->od_otable_mutex);
2278         rc = do_osd_scrub_start(dev, flags);
2279         mutex_unlock(&dev->od_otable_mutex);
2280
2281         RETURN(rc == -EALREADY ? 0 : rc);
2282 }
2283
2284 static void do_osd_scrub_stop(struct osd_scrub *scrub)
2285 {
2286         struct ptlrpc_thread *thread = &scrub->os_thread;
2287         struct l_wait_info    lwi    = { 0 };
2288
2289         /* os_lock: sync status between stop and scrub thread */
2290         spin_lock(&scrub->os_lock);
2291         if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
2292                 thread_set_flags(thread, SVC_STOPPING);
2293                 spin_unlock(&scrub->os_lock);
2294                 wake_up_all(&thread->t_ctl_waitq);
2295                 l_wait_event(thread->t_ctl_waitq,
2296                              thread_is_stopped(thread),
2297                              &lwi);
2298                 /* Do not skip the last lock/unlock, which can guarantee that
2299                  * the caller cannot return until the OI scrub thread exit. */
2300                 spin_lock(&scrub->os_lock);
2301         }
2302         spin_unlock(&scrub->os_lock);
2303 }
2304
2305 static void osd_scrub_stop(struct osd_device *dev)
2306 {
2307         /* od_otable_mutex: prevent curcurrent start/stop */
2308         mutex_lock(&dev->od_otable_mutex);
2309         dev->od_scrub.os_paused = 1;
2310         do_osd_scrub_stop(&dev->od_scrub);
2311         mutex_unlock(&dev->od_otable_mutex);
2312 }
2313
2314 /* OI scrub setup/cleanup */
2315
2316 static const char osd_scrub_name[] = "OI_scrub";
2317
2318 int osd_scrub_setup(const struct lu_env *env, struct osd_device *dev)
2319 {
2320         struct osd_thread_info     *info   = osd_oti_get(env);
2321         struct osd_scrub           *scrub  = &dev->od_scrub;
2322         struct lvfs_run_ctxt       *ctxt   = &scrub->os_ctxt;
2323         struct scrub_file          *sf     = &scrub->os_file;
2324         struct super_block         *sb     = osd_sb(dev);
2325         struct ldiskfs_super_block *es     = LDISKFS_SB(sb)->s_es;
2326         struct lvfs_run_ctxt        saved;
2327         struct file                *filp;
2328         struct inode               *inode;
2329         struct lu_fid              *fid    = &info->oti_fid;
2330         int                         dirty  = 0;
2331         int                         rc     = 0;
2332         ENTRY;
2333
2334         memset(scrub, 0, sizeof(*scrub));
2335         OBD_SET_CTXT_MAGIC(ctxt);
2336         ctxt->pwdmnt = dev->od_mnt;
2337         ctxt->pwd = dev->od_mnt->mnt_root;
2338         ctxt->fs = get_ds();
2339
2340         init_waitqueue_head(&scrub->os_thread.t_ctl_waitq);
2341         init_rwsem(&scrub->os_rwsem);
2342         spin_lock_init(&scrub->os_lock);
2343         INIT_LIST_HEAD(&scrub->os_inconsistent_items);
2344
2345         push_ctxt(&saved, ctxt);
2346         filp = filp_open(osd_scrub_name, O_RDWR | O_CREAT, 0644);
2347         if (IS_ERR(filp)) {
2348                 pop_ctxt(&saved, ctxt);
2349                 RETURN(PTR_ERR(filp));
2350         }
2351
2352         inode = filp->f_dentry->d_inode;
2353         /* 'What the @fid is' is not imporatant, because the object
2354          * has no OI mapping, and only is visible inside the OSD.*/
2355         lu_igif_build(fid, inode->i_ino, inode->i_generation);
2356         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
2357         if (rc != 0) {
2358                 filp_close(filp, NULL);
2359                 pop_ctxt(&saved, ctxt);
2360                 RETURN(rc);
2361         }
2362
2363         scrub->os_inode = igrab(inode);
2364         filp_close(filp, NULL);
2365         pop_ctxt(&saved, ctxt);
2366
2367         rc = osd_scrub_file_load(scrub);
2368         if (rc == -ENOENT) {
2369                 osd_scrub_file_init(scrub, es->s_uuid);
2370                 /* If the "/O" dir does not exist when mount (indicated by
2371                  * osd_device::od_maybe_new), neither for the "/OI_scrub",
2372                  * then it is quite probably that the device is a new one,
2373                  * under such case, mark it as SIF_NO_HANDLE_OLD_FID.
2374                  *
2375                  * For the rare case that "/O" and "OI_scrub" both lost on
2376                  * an old device, it can be found and cleared later.
2377                  *
2378                  * For the system with "SIF_NO_HANDLE_OLD_FID", we do not
2379                  * need to check "filter_fid_old" and to convert it to
2380                  * "filter_fid" for each object, and all the IGIF should
2381                  * have their FID mapping in OI files already. */
2382                 if (dev->od_maybe_new)
2383                         sf->sf_internal_flags = SIF_NO_HANDLE_OLD_FID;
2384                 dirty = 1;
2385         } else if (rc != 0) {
2386                 GOTO(cleanup_inode, rc);
2387         } else {
2388                 if (memcmp(sf->sf_uuid, es->s_uuid, 16) != 0) {
2389                         osd_scrub_file_reset(scrub, es->s_uuid,SF_INCONSISTENT);
2390                         dirty = 1;
2391                 } else if (sf->sf_status == SS_SCANNING) {
2392                         sf->sf_status = SS_CRASHED;
2393                         dirty = 1;
2394                 }
2395         }
2396
2397         if (sf->sf_pos_last_checkpoint != 0)
2398                 scrub->os_pos_current = sf->sf_pos_last_checkpoint + 1;
2399         else
2400                 scrub->os_pos_current = LDISKFS_FIRST_INO(sb) + 1;
2401
2402         if (dirty != 0) {
2403                 rc = osd_scrub_file_store(scrub);
2404                 if (rc != 0)
2405                         GOTO(cleanup_inode, rc);
2406         }
2407
2408         /* Initialize OI files. */
2409         rc = osd_oi_init(info, dev);
2410         if (rc < 0)
2411                 GOTO(cleanup_inode, rc);
2412
2413         rc = osd_initial_OI_scrub(info, dev);
2414         if (rc != 0)
2415                 GOTO(cleanup_oi, rc);
2416
2417         if (sf->sf_flags & SF_UPGRADE ||
2418             !(sf->sf_internal_flags & SIF_NO_HANDLE_OLD_FID ||
2419               sf->sf_success_count > 0)) {
2420                 dev->od_igif_inoi = 0;
2421                 dev->od_check_ff = dev->od_is_ost;
2422         } else {
2423                 dev->od_igif_inoi = 1;
2424                 dev->od_check_ff = 0;
2425         }
2426
2427         if (sf->sf_flags & SF_INCONSISTENT)
2428                 /* The 'od_igif_inoi' will be set under the
2429                  * following cases:
2430                  * 1) new created system, or
2431                  * 2) restored from file-level backup, or
2432                  * 3) the upgrading completed.
2433                  *
2434                  * The 'od_igif_inoi' may be cleared by OI scrub
2435                  * later if found that the system is upgrading. */
2436                 dev->od_igif_inoi = 1;
2437
2438         if (!dev->od_noscrub &&
2439             ((sf->sf_status == SS_PAUSED) ||
2440              (sf->sf_status == SS_CRASHED &&
2441               sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT |
2442                               SF_UPGRADE | SF_AUTO)) ||
2443              (sf->sf_status == SS_INIT &&
2444               sf->sf_flags & (SF_RECREATED | SF_INCONSISTENT |
2445                               SF_UPGRADE))))
2446                 rc = osd_scrub_start(dev, SS_AUTO_FULL);
2447
2448         if (rc != 0)
2449                 GOTO(cleanup_oi, rc);
2450
2451         /* it is possible that dcache entries may keep objects after they are
2452          * deleted by OSD. While it looks safe this can cause object data to
2453          * stay until umount causing failures in tests calculating free space,
2454          * e.g. replay-ost-single. Since those dcache entries are not used
2455          * anymore let's just free them after use here */
2456         shrink_dcache_sb(sb);
2457
2458         RETURN(0);
2459 cleanup_oi:
2460         osd_oi_fini(info, dev);
2461 cleanup_inode:
2462         iput(scrub->os_inode);
2463         scrub->os_inode = NULL;
2464
2465         return rc;
2466 }
2467
2468 void osd_scrub_cleanup(const struct lu_env *env, struct osd_device *dev)
2469 {
2470         struct osd_scrub *scrub = &dev->od_scrub;
2471
2472         LASSERT(dev->od_otable_it == NULL);
2473
2474         if (scrub->os_inode != NULL) {
2475                 osd_scrub_stop(dev);
2476                 iput(scrub->os_inode);
2477                 scrub->os_inode = NULL;
2478         }
2479         if (dev->od_oi_table != NULL)
2480                 osd_oi_fini(osd_oti_get(env), dev);
2481 }
2482
2483 /* object table based iteration APIs */
2484
2485 static struct dt_it *osd_otable_it_init(const struct lu_env *env,
2486                                        struct dt_object *dt, __u32 attr,
2487                                        struct lustre_capa *capa)
2488 {
2489         enum dt_otable_it_flags flags = attr >> DT_OTABLE_IT_FLAGS_SHIFT;
2490         enum dt_otable_it_valid valid = attr & ~DT_OTABLE_IT_FLAGS_MASK;
2491         struct osd_device      *dev   = osd_dev(dt->do_lu.lo_dev);
2492         struct osd_scrub       *scrub = &dev->od_scrub;
2493         struct osd_otable_it   *it;
2494         __u32                   start = 0;
2495         int                     rc;
2496         ENTRY;
2497
2498         /* od_otable_mutex: prevent curcurrent init/fini */
2499         mutex_lock(&dev->od_otable_mutex);
2500         if (dev->od_otable_it != NULL)
2501                 GOTO(out, it = ERR_PTR(-EALREADY));
2502
2503         OBD_ALLOC_PTR(it);
2504         if (it == NULL)
2505                 GOTO(out, it = ERR_PTR(-ENOMEM));
2506
2507         dev->od_otable_it = it;
2508         it->ooi_dev = dev;
2509         it->ooi_cache.ooc_consumer_idx = -1;
2510         if (flags & DOIF_OUTUSED)
2511                 it->ooi_used_outside = 1;
2512
2513         if (flags & DOIF_RESET)
2514                 start |= SS_RESET;
2515
2516         if (valid & DOIV_ERROR_HANDLE) {
2517                 if (flags & DOIF_FAILOUT)
2518                         start |= SS_SET_FAILOUT;
2519                 else
2520                         start |= SS_CLEAR_FAILOUT;
2521         }
2522
2523         if (valid & DOIV_DRYRUN) {
2524                 if (flags & DOIF_DRYRUN)
2525                         start |= SS_SET_DRYRUN;
2526                 else
2527                         start |= SS_CLEAR_DRYRUN;
2528         }
2529
2530         rc = do_osd_scrub_start(dev, start & ~SS_AUTO_PARTIAL);
2531         if (rc < 0 && rc != -EALREADY) {
2532                 dev->od_otable_it = NULL;
2533                 OBD_FREE_PTR(it);
2534                 GOTO(out, it = ERR_PTR(rc));
2535         }
2536
2537         it->ooi_cache.ooc_pos_preload = scrub->os_pos_current;
2538
2539         GOTO(out, it);
2540
2541 out:
2542         mutex_unlock(&dev->od_otable_mutex);
2543         return (struct dt_it *)it;
2544 }
2545
2546 static void osd_otable_it_fini(const struct lu_env *env, struct dt_it *di)
2547 {
2548         struct osd_otable_it *it  = (struct osd_otable_it *)di;
2549         struct osd_device    *dev = it->ooi_dev;
2550
2551         /* od_otable_mutex: prevent curcurrent init/fini */
2552         mutex_lock(&dev->od_otable_mutex);
2553         do_osd_scrub_stop(&dev->od_scrub);
2554         LASSERT(dev->od_otable_it == it);
2555
2556         dev->od_otable_it = NULL;
2557         mutex_unlock(&dev->od_otable_mutex);
2558         OBD_FREE_PTR(it);
2559 }
2560
2561 static int osd_otable_it_get(const struct lu_env *env,
2562                              struct dt_it *di, const struct dt_key *key)
2563 {
2564         return 0;
2565 }
2566
2567 static void osd_otable_it_put(const struct lu_env *env, struct dt_it *di)
2568 {
2569 }
2570
2571 static inline int
2572 osd_otable_it_wakeup(struct osd_scrub *scrub, struct osd_otable_it *it)
2573 {
2574         spin_lock(&scrub->os_lock);
2575         if (it->ooi_cache.ooc_pos_preload < scrub->os_pos_current ||
2576             scrub->os_waiting ||
2577             !thread_is_running(&scrub->os_thread))
2578                 it->ooi_waiting = 0;
2579         else
2580                 it->ooi_waiting = 1;
2581         spin_unlock(&scrub->os_lock);
2582
2583         return !it->ooi_waiting;
2584 }
2585
2586 static int osd_otable_it_next(const struct lu_env *env, struct dt_it *di)
2587 {
2588         struct osd_otable_it    *it     = (struct osd_otable_it *)di;
2589         struct osd_device       *dev    = it->ooi_dev;
2590         struct osd_scrub        *scrub  = &dev->od_scrub;
2591         struct osd_otable_cache *ooc    = &it->ooi_cache;
2592         struct ptlrpc_thread    *thread = &scrub->os_thread;
2593         struct l_wait_info       lwi    = { 0 };
2594         int                      rc;
2595         ENTRY;
2596
2597         LASSERT(it->ooi_user_ready);
2598
2599 again:
2600         if (!thread_is_running(thread) && !it->ooi_used_outside)
2601                 RETURN(1);
2602
2603         if (ooc->ooc_cached_items > 0) {
2604                 ooc->ooc_cached_items--;
2605                 ooc->ooc_consumer_idx = (ooc->ooc_consumer_idx + 1) &
2606                                         ~OSD_OTABLE_IT_CACHE_MASK;
2607                 RETURN(0);
2608         }
2609
2610         if (it->ooi_all_cached) {
2611                 l_wait_event(thread->t_ctl_waitq,
2612                              !thread_is_running(thread),
2613                              &lwi);
2614                 RETURN(1);
2615         }
2616
2617         if (scrub->os_waiting && osd_scrub_has_window(scrub, ooc)) {
2618                 spin_lock(&scrub->os_lock);
2619                 scrub->os_waiting = 0;
2620                 wake_up_all(&scrub->os_thread.t_ctl_waitq);
2621                 spin_unlock(&scrub->os_lock);
2622         }
2623
2624         if (it->ooi_cache.ooc_pos_preload >= scrub->os_pos_current)
2625                 l_wait_event(thread->t_ctl_waitq,
2626                              osd_otable_it_wakeup(scrub, it),
2627                              &lwi);
2628
2629         if (!thread_is_running(thread) && !it->ooi_used_outside)
2630                 RETURN(1);
2631
2632         rc = osd_otable_it_preload(env, it);
2633         if (rc >= 0)
2634                 goto again;
2635
2636         RETURN(rc);
2637 }
2638
2639 static struct dt_key *osd_otable_it_key(const struct lu_env *env,
2640                                         const struct dt_it *di)
2641 {
2642         return NULL;
2643 }
2644
2645 static int osd_otable_it_key_size(const struct lu_env *env,
2646                                   const struct dt_it *di)
2647 {
2648         return sizeof(__u64);
2649 }
2650
2651 static int osd_otable_it_rec(const struct lu_env *env, const struct dt_it *di,
2652                              struct dt_rec *rec, __u32 attr)
2653 {
2654         struct osd_otable_it    *it  = (struct osd_otable_it *)di;
2655         struct osd_otable_cache *ooc = &it->ooi_cache;
2656
2657         *(struct lu_fid *)rec = ooc->ooc_cache[ooc->ooc_consumer_idx].oic_fid;
2658
2659         /* Filter out Invald FID already. */
2660         LASSERTF(fid_is_sane((struct lu_fid *)rec),
2661                  "Invalid FID "DFID", p_idx = %d, c_idx = %d\n",
2662                  PFID((struct lu_fid *)rec),
2663                  ooc->ooc_producer_idx, ooc->ooc_consumer_idx);
2664
2665         return 0;
2666 }
2667
2668 static __u64 osd_otable_it_store(const struct lu_env *env,
2669                                  const struct dt_it *di)
2670 {
2671         struct osd_otable_it    *it  = (struct osd_otable_it *)di;
2672         struct osd_otable_cache *ooc = &it->ooi_cache;
2673         __u64                    hash;
2674
2675         if (it->ooi_user_ready && ooc->ooc_consumer_idx != -1)
2676                 hash = ooc->ooc_cache[ooc->ooc_consumer_idx].oic_lid.oii_ino;
2677         else
2678                 hash = ooc->ooc_pos_preload;
2679         return hash;
2680 }
2681
2682 /**
2683  * Set the OSD layer iteration start position as the specified hash.
2684  */
2685 static int osd_otable_it_load(const struct lu_env *env,
2686                               const struct dt_it *di, __u64 hash)
2687 {
2688         struct osd_otable_it    *it    = (struct osd_otable_it *)di;
2689         struct osd_device       *dev   = it->ooi_dev;
2690         struct osd_otable_cache *ooc   = &it->ooi_cache;
2691         struct osd_scrub        *scrub = &dev->od_scrub;
2692         int                      rc;
2693         ENTRY;
2694
2695         /* Forbid to set iteration position after iteration started. */
2696         if (it->ooi_user_ready)
2697                 RETURN(-EPERM);
2698
2699         if (hash > OSD_OTABLE_MAX_HASH)
2700                 hash = OSD_OTABLE_MAX_HASH;
2701
2702         ooc->ooc_pos_preload = hash;
2703         if (ooc->ooc_pos_preload <= LDISKFS_FIRST_INO(osd_sb(dev)))
2704                 ooc->ooc_pos_preload = LDISKFS_FIRST_INO(osd_sb(dev)) + 1;
2705
2706         it->ooi_user_ready = 1;
2707         if (!scrub->os_full_speed)
2708                 wake_up_all(&scrub->os_thread.t_ctl_waitq);
2709
2710         /* Unplug OSD layer iteration by the first next() call. */
2711         rc = osd_otable_it_next(env, (struct dt_it *)it);
2712
2713         RETURN(rc);
2714 }
2715
2716 static int osd_otable_it_key_rec(const struct lu_env *env,
2717                                  const struct dt_it *di, void *key_rec)
2718 {
2719         return 0;
2720 }
2721
2722 const struct dt_index_operations osd_otable_ops = {
2723         .dio_it = {
2724                 .init     = osd_otable_it_init,
2725                 .fini     = osd_otable_it_fini,
2726                 .get      = osd_otable_it_get,
2727                 .put      = osd_otable_it_put,
2728                 .next     = osd_otable_it_next,
2729                 .key      = osd_otable_it_key,
2730                 .key_size = osd_otable_it_key_size,
2731                 .rec      = osd_otable_it_rec,
2732                 .store    = osd_otable_it_store,
2733                 .load     = osd_otable_it_load,
2734                 .key_rec  = osd_otable_it_key_rec,
2735         }
2736 };
2737
2738 /* high priority inconsistent items list APIs */
2739
2740 #define SCRUB_BAD_OIMAP_DECAY_INTERVAL  60
2741
2742 int osd_oii_insert(struct osd_device *dev, struct osd_idmap_cache *oic,
2743                    int insert)
2744 {
2745         struct osd_inconsistent_item *oii;
2746         struct osd_scrub             *scrub  = &dev->od_scrub;
2747         struct ptlrpc_thread         *thread = &scrub->os_thread;
2748         int                           wakeup = 0;
2749         ENTRY;
2750
2751         OBD_ALLOC_PTR(oii);
2752         if (unlikely(oii == NULL))
2753                 RETURN(-ENOMEM);
2754
2755         INIT_LIST_HEAD(&oii->oii_list);
2756         oii->oii_cache = *oic;
2757         oii->oii_insert = insert;
2758
2759         if (scrub->os_partial_scan) {
2760                 __u64 now = cfs_time_current_sec();
2761
2762                 /* If there haven't been errors in a long time,
2763                  * decay old count until either the errors are
2764                  * gone or we reach the current interval. */
2765                 while (unlikely(scrub->os_bad_oimap_count > 0 &&
2766                                 scrub->os_bad_oimap_time +
2767                                 SCRUB_BAD_OIMAP_DECAY_INTERVAL < now)) {
2768                         scrub->os_bad_oimap_count >>= 1;
2769                         scrub->os_bad_oimap_time +=
2770                                 SCRUB_BAD_OIMAP_DECAY_INTERVAL;
2771                 }
2772
2773                 scrub->os_bad_oimap_time = now;
2774                 if (++scrub->os_bad_oimap_count >
2775                     dev->od_full_scrub_threshold_rate)
2776                         scrub->os_full_scrub = 1;
2777         }
2778
2779         spin_lock(&scrub->os_lock);
2780         if (unlikely(!thread_is_running(thread))) {
2781                 spin_unlock(&scrub->os_lock);
2782                 OBD_FREE_PTR(oii);
2783                 RETURN(-EAGAIN);
2784         }
2785
2786         if (list_empty(&scrub->os_inconsistent_items))
2787                 wakeup = 1;
2788         list_add_tail(&oii->oii_list, &scrub->os_inconsistent_items);
2789         spin_unlock(&scrub->os_lock);
2790
2791         if (wakeup != 0)
2792                 wake_up_all(&thread->t_ctl_waitq);
2793
2794         RETURN(0);
2795 }
2796
2797 int osd_oii_lookup(struct osd_device *dev, const struct lu_fid *fid,
2798                    struct osd_inode_id *id)
2799 {
2800         struct osd_scrub             *scrub = &dev->od_scrub;
2801         struct osd_inconsistent_item *oii;
2802         ENTRY;
2803
2804         spin_lock(&scrub->os_lock);
2805         list_for_each_entry(oii, &scrub->os_inconsistent_items, oii_list) {
2806                 if (lu_fid_eq(fid, &oii->oii_cache.oic_fid)) {
2807                         *id = oii->oii_cache.oic_lid;
2808                         spin_unlock(&scrub->os_lock);
2809                         RETURN(0);
2810                 }
2811         }
2812         spin_unlock(&scrub->os_lock);
2813
2814         RETURN(-ENOENT);
2815 }
2816
2817 /* OI scrub dump */
2818
2819 static const char *scrub_status_names[] = {
2820         "init",
2821         "scanning",
2822         "completed",
2823         "failed",
2824         "stopped",
2825         "paused",
2826         "crashed",
2827         NULL
2828 };
2829
2830 static const char *scrub_flags_names[] = {
2831         "recreated",
2832         "inconsistent",
2833         "auto",
2834         "upgrade",
2835         NULL
2836 };
2837
2838 static const char *scrub_param_names[] = {
2839         "failout",
2840         "dryrun",
2841         NULL
2842 };
2843
2844 static int scrub_bits_dump(struct seq_file *m, int bits, const char *names[],
2845                            const char *prefix)
2846 {
2847         int flag;
2848         int rc;
2849         int i;
2850
2851         rc = seq_printf(m, "%s:%c", prefix, bits != 0 ? ' ' : '\n');
2852         if (rc < 0)
2853                 return rc;
2854
2855         for (i = 0, flag = 1; bits != 0; i++, flag = 1 << i) {
2856                 if (flag & bits) {
2857                         bits &= ~flag;
2858                         rc = seq_printf(m, "%s%c", names[i],
2859                                         bits != 0 ? ',' : '\n');
2860                         if (rc < 0)
2861                                 return rc;
2862                 }
2863         }
2864         return 0;
2865 }
2866
2867 static int scrub_time_dump(struct seq_file *m, __u64 time, const char *prefix)
2868 {
2869         int rc;
2870
2871         if (time != 0)
2872                 rc = seq_printf(m, "%s: "LPU64" seconds\n", prefix,
2873                               cfs_time_current_sec() - time);
2874         else
2875                 rc = seq_printf(m, "%s: N/A\n", prefix);
2876         return rc;
2877 }
2878
2879 static int scrub_pos_dump(struct seq_file *m, __u64 pos, const char *prefix)
2880 {
2881         int rc;
2882
2883         if (pos != 0)
2884                 rc = seq_printf(m, "%s: "LPU64"\n", prefix, pos);
2885         else
2886                 rc = seq_printf(m, "%s: N/A\n", prefix);
2887         return rc;
2888 }
2889
2890 int osd_scrub_dump(struct seq_file *m, struct osd_device *dev)
2891 {
2892         struct osd_scrub  *scrub   = &dev->od_scrub;
2893         struct scrub_file *sf      = &scrub->os_file;
2894         __u64              checked;
2895         __u64              speed;
2896         int                rc;
2897
2898         down_read(&scrub->os_rwsem);
2899         rc = seq_printf(m, "name: OI_scrub\n"
2900                         "magic: 0x%x\n"
2901                         "oi_files: %d\n"
2902                         "status: %s\n",
2903                         sf->sf_magic, (int)sf->sf_oi_count,
2904                         scrub_status_names[sf->sf_status]);
2905         if (rc < 0)
2906                 goto out;
2907
2908         rc = scrub_bits_dump(m, sf->sf_flags, scrub_flags_names,
2909                              "flags");
2910         if (rc < 0)
2911                 goto out;
2912
2913         rc = scrub_bits_dump(m, sf->sf_param, scrub_param_names,
2914                              "param");
2915         if (rc < 0)
2916                 goto out;
2917
2918         rc = scrub_time_dump(m, sf->sf_time_last_complete,
2919                              "time_since_last_completed");
2920         if (rc < 0)
2921                 goto out;
2922
2923         rc = scrub_time_dump(m, sf->sf_time_latest_start,
2924                              "time_since_latest_start");
2925         if (rc < 0)
2926                 goto out;
2927
2928         rc = scrub_time_dump(m, sf->sf_time_last_checkpoint,
2929                              "time_since_last_checkpoint");
2930         if (rc < 0)
2931                 goto out;
2932
2933         rc = scrub_pos_dump(m, sf->sf_pos_latest_start,
2934                             "latest_start_position");
2935         if (rc < 0)
2936                 goto out;
2937
2938         rc = scrub_pos_dump(m, sf->sf_pos_last_checkpoint,
2939                             "last_checkpoint_position");
2940         if (rc < 0)
2941                 goto out;
2942
2943         rc = scrub_pos_dump(m, sf->sf_pos_first_inconsistent,
2944                             "first_failure_position");
2945         if (rc < 0)
2946                 goto out;
2947
2948         checked = sf->sf_items_checked + scrub->os_new_checked;
2949         rc = seq_printf(m, "checked: "LPU64"\n"
2950                       "updated: "LPU64"\n"
2951                       "failed: "LPU64"\n"
2952                       "prior_updated: "LPU64"\n"
2953                       "noscrub: "LPU64"\n"
2954                       "igif: "LPU64"\n"
2955                       "success_count: %u\n",
2956                       checked, sf->sf_items_updated, sf->sf_items_failed,
2957                       sf->sf_items_updated_prior, sf->sf_items_noscrub,
2958                       sf->sf_items_igif, sf->sf_success_count);
2959         if (rc < 0)
2960                 goto out;
2961
2962         speed = checked;
2963         if (thread_is_running(&scrub->os_thread)) {
2964                 cfs_duration_t duration = cfs_time_current() -
2965                                           scrub->os_time_last_checkpoint;
2966                 __u64 new_checked = msecs_to_jiffies(scrub->os_new_checked *
2967                                                      MSEC_PER_SEC);
2968                 __u32 rtime = sf->sf_run_time +
2969                               cfs_duration_sec(duration + HALF_SEC);
2970
2971                 if (duration != 0)
2972                         do_div(new_checked, duration);
2973                 if (rtime != 0)
2974                         do_div(speed, rtime);
2975                 rc = seq_printf(m, "run_time: %u seconds\n"
2976                               "average_speed: "LPU64" objects/sec\n"
2977                               "real-time_speed: "LPU64" objects/sec\n"
2978                               "current_position: %u\n"
2979                               "lf_scanned: "LPU64"\n"
2980                               "lf_reparied: "LPU64"\n"
2981                               "lf_failed: "LPU64"\n",
2982                               rtime, speed, new_checked, scrub->os_pos_current,
2983                               scrub->os_lf_scanned, scrub->os_lf_repaired,
2984                               scrub->os_lf_failed);
2985         } else {
2986                 if (sf->sf_run_time != 0)
2987                         do_div(speed, sf->sf_run_time);
2988                 rc = seq_printf(m, "run_time: %u seconds\n"
2989                               "average_speed: "LPU64" objects/sec\n"
2990                               "real-time_speed: N/A\n"
2991                               "current_position: N/A\n"
2992                               "lf_scanned: "LPU64"\n"
2993                               "lf_reparied: "LPU64"\n"
2994                               "lf_failed: "LPU64"\n",
2995                               sf->sf_run_time, speed, scrub->os_lf_scanned,
2996                               scrub->os_lf_repaired, scrub->os_lf_failed);
2997         }
2998
2999 out:
3000         up_read(&scrub->os_rwsem);
3001         return (rc < 0 ? -ENOSPC : 0);
3002 }