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LU-6351 lfsck: check object existence before using it
[fs/lustre-release.git] / lustre / lfsck / lfsck_striped_dir.c
index c21e1dc..8ed965c 100644 (file)
@@ -196,7 +196,7 @@ void lfsck_lmv_put(const struct lu_env *env, struct lfsck_lmv *llmv)
  * \param[in] del_lmv  true if need to drop the LMV EA
  *
  * \retval             positive number if nothing to be done
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 static int lfsck_disable_master_lmv(const struct lu_env *env,
@@ -206,7 +206,7 @@ static int lfsck_disable_master_lmv(const struct lu_env *env,
        struct lfsck_thread_info        *info   = lfsck_env_info(env);
        struct lu_attr                  *la     = &info->lti_la;
        struct lfsck_instance           *lfsck  = com->lc_lfsck;
-       struct dt_device                *dev    = lfsck_obj2dt_dev(obj);
+       struct dt_device                *dev    = lfsck_obj2dev(obj);
        struct thandle                  *th     = NULL;
        int                              rc     = 0;
        ENTRY;
@@ -238,16 +238,16 @@ static int lfsck_disable_master_lmv(const struct lu_env *env,
                GOTO(unlock, rc = 0);
 
        if (del_lmv) {
-               rc = dt_xattr_del(env, obj, XATTR_NAME_LMV, th, BYPASS_CAPA);
+               rc = dt_xattr_del(env, obj, XATTR_NAME_LMV, th);
                if (rc != 0)
                        GOTO(unlock, rc);
        }
 
-       rc = dt_attr_get(env, obj, la, BYPASS_CAPA);
+       rc = dt_attr_get(env, obj, la);
        if (rc == 0 && !(la->la_flags & LUSTRE_IMMUTABLE_FL)) {
                la->la_valid = LA_FLAGS;
                la->la_flags |= LUSTRE_IMMUTABLE_FL;
-               rc = dt_attr_set(env, obj, la, th, BYPASS_CAPA);
+               rc = dt_attr_set(env, obj, la, th);
        }
 
        GOTO(unlock, rc);
@@ -290,18 +290,19 @@ static inline bool lfsck_is_valid_slave_lmv(struct lmv_mds_md_v1 *lmv)
  *
  * \param[in] env      pointer to the thread context
  * \param[in] com      pointer to the lfsck component
+ * \param[in] obj      pointer to the striped directory to be handled
  * \param[in] lnr      pointer to the namespace request that contains the
  *                     striped directory to be handled and other information
  *
  * \retval             positive number if nothing to be done
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 static int lfsck_remove_lmv(const struct lu_env *env,
                            struct lfsck_component *com,
+                           struct dt_object *obj,
                            struct lfsck_namespace_req *lnr)
 {
-       struct dt_object        *obj    = lnr->lnr_obj;
        struct lustre_handle     lh     = { 0 };
        int                      rc;
 
@@ -341,7 +342,7 @@ static int lfsck_remove_dirent(const struct lu_env *env,
 
        snprintf(info->lti_tmpbuf2, sizeof(info->lti_tmpbuf2), DFID":%u",
                 PFID(fid), index);
-       obj = lfsck_object_find_by_dev(env, com->lc_lfsck->li_bottom, fid);
+       obj = lfsck_object_find_bottom(env, com->lc_lfsck, fid);
        if (IS_ERR(obj))
                return PTR_ERR(obj);
 
@@ -367,6 +368,7 @@ static int lfsck_remove_dirent(const struct lu_env *env,
  *
  * \param[in] env      pointer to the thread context
  * \param[in] com      pointer to the lfsck component
+ * \param[in] dir      pointer to the striped directory to be handled
  * \param[in] lslr     pointer to lfsck_disable_master_lmv slot which content
  *                     will be replaced by the given information
  * \param[in] lnr      contain the shard's FID to be used to fill the
@@ -377,11 +379,12 @@ static int lfsck_remove_dirent(const struct lu_env *env,
  * \param[in] index    the old shard's index in the striped directory
  * \param[in] flags    the new shard's flags in the @lslr slot
  *
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 static int lfsck_replace_lmv(const struct lu_env *env,
                             struct lfsck_component *com,
+                            struct dt_object *dir,
                             struct lfsck_slave_lmv_rec *lslr,
                             struct lfsck_namespace_req *lnr,
                             struct lmv_mds_md_v1 *lmv,
@@ -390,7 +393,7 @@ static int lfsck_replace_lmv(const struct lu_env *env,
        struct lfsck_lmv *llmv = lnr->lnr_lmv;
        int               rc;
 
-       rc = lfsck_remove_dirent(env, com, lnr->lnr_obj,
+       rc = lfsck_remove_dirent(env, com, dir,
                                 &lslr->lslr_fid, index);
        if (rc < 0)
                return rc;
@@ -454,6 +457,7 @@ static int lfsck_replace_lmv(const struct lu_env *env,
  *
  * \param[in] env      pointer to the thread context
  * \param[in] com      pointer to the lfsck component
+ * \param[in] dir      pointer to the striped directory to be handled
  * \param[in] lnr      contain the shard's FID to fill the @lslr slot,
  *                     it also records the known max filled index and
  *                     the known max stripe count
@@ -472,7 +476,7 @@ static int lfsck_replace_lmv(const struct lu_env *env,
  *                     we define the max depth can be called recursively
  *                     (LFSCK_REC_LMV_MAX_DEPTH)
  *
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             "-ERANGE" for invalid @shard_idx
  * \retval             "-EEXIST" for the required lslr slot has been
  *                     occupied by other shard
@@ -480,13 +484,13 @@ static int lfsck_replace_lmv(const struct lu_env *env,
  */
 static int lfsck_record_lmv(const struct lu_env *env,
                            struct lfsck_component *com,
+                           struct dt_object *dir,
                            struct lfsck_namespace_req *lnr,
                            struct lmv_mds_md_v1 *lmv, __u32 shard_idx,
                            __u32 flags, __u32 flags2, __u32 *depth)
 {
        struct lfsck_instance      *lfsck = com->lc_lfsck;
        struct lfsck_lmv           *llmv  = lnr->lnr_lmv;
-       struct dt_object           *dir   = lnr->lnr_obj;
        const struct lu_fid        *fid   = &lnr->lnr_fid;
        struct lfsck_slave_lmv_rec *lslr;
        struct lfsck_rec_lmv_save  *lrls;
@@ -567,7 +571,7 @@ static int lfsck_record_lmv(const struct lu_env *env,
                         * mark the master MDT-object as read-only. The
                         * administrator can handle the conflict with
                         * more human knowledge. */
-                       rc = lfsck_remove_lmv(env, com, lnr);
+                       rc = lfsck_remove_lmv(env, com, dir, lnr);
                        break;
                case LSLF_BAD_INDEX2:
                        GOTO(out, rc = -EEXIST);
@@ -586,7 +590,7 @@ no_lmvea:
                                 * as read-only. The administrator can
                                 * handle the conflict with more human
                                 * knowledge. */
-                               rc = lfsck_remove_lmv(env, com, lnr);
+                               rc = lfsck_remove_lmv(env, com, dir, lnr);
                        } else {
                                /* Otherwise, remove the current name entry,
                                 * and add its FID in the LFSCK tracing file
@@ -609,7 +613,7 @@ no_lmvea:
                        /* The name entry claims an index that is conflict
                         * with a valid existing name entry, then try the
                         * index in the lmv recursively. */
-                       rc = lfsck_record_lmv(env, com, lnr, lmv, index,
+                       rc = lfsck_record_lmv(env, com, dir, lnr, lmv, index,
                                LSLF_BAD_INDEX2, lslr->lslr_flags, depth);
                        lmv->lmv_master_mdt_index = index;
                        if (rc == -ERANGE || rc == -EEXIST)
@@ -618,7 +622,7 @@ no_lmvea:
                                 * not know how to resolve the conflict.
                                 * We will handle it as handle the case
                                 * of 'LSLF_NONE' vs 'LSLF_NONE'. */
-                               rc = lfsck_remove_lmv(env, com, lnr);
+                               rc = lfsck_remove_lmv(env, com, dir, lnr);
 
                        break;
                default:
@@ -644,7 +648,7 @@ none:
                                 * as read-only. The administrator can
                                 * handle the conflict with more human
                                 * knowledge. */
-                               rc = lfsck_remove_lmv(env, com, lnr);
+                               rc = lfsck_remove_lmv(env, com, dir, lnr);
                        } else {
                                lrls = &lfsck->li_rec_lmv_save[*depth - 1];
                                lrls->lrls_fid = lslr->lslr_fid;
@@ -656,8 +660,8 @@ none:
                                                com, &lrls->lrls_fid,
                                                LNTF_CHECK_PARENT, true);
                                if (rc == 0)
-                                       rc = lfsck_replace_lmv(env, com, lslr,
-                                                       lnr, lmv, index, flags);
+                                       rc = lfsck_replace_lmv(env, com, dir,
+                                               lslr, lnr, lmv, index, flags);
                        }
 
                        break;
@@ -678,7 +682,7 @@ none:
                        /* The name entry claims an index that is conflict
                         * with a valid existing name entry, then try the
                         * index in the lmv recursively. */
-                       rc = lfsck_record_lmv(env, com, lnr, lmv, index,
+                       rc = lfsck_record_lmv(env, com, dir, lnr, lmv, index,
                                LSLF_BAD_INDEX2, lslr->lslr_flags, depth);
                        lmv->lmv_master_mdt_index = index;
                        if (rc == -ERANGE || rc == -EEXIST) {
@@ -700,7 +704,7 @@ none:
                case LSLF_NO_LMVEA:
                        /* Remove the existing dangling name entry.
                         * Refill the lslr slot with the given LMV. */
-                       rc = lfsck_replace_lmv(env, com, lslr, lnr,
+                       rc = lfsck_replace_lmv(env, com, dir, lslr, lnr,
                                               lmv, index, flags);
                        break;
                case LSLF_DANGLING:
@@ -714,7 +718,7 @@ none:
                        /* The name entry claims an index that is conflict
                         * with a valid existing name entry, then try the
                         * index in the lmv recursively. */
-                       rc = lfsck_record_lmv(env, com, lnr, lmv, index,
+                       rc = lfsck_record_lmv(env, com, dir, lnr, lmv, index,
                                LSLF_BAD_INDEX2, lslr->lslr_flags, depth);
                        lmv->lmv_master_mdt_index = index;
                        if (rc == -ERANGE || rc == -EEXIST)
@@ -722,7 +726,7 @@ none:
                                 * also conflict with other, then remove
                                 * the existing dangling name entry.
                                 * Refill the lslr slot with the given LMV. */
-                               rc = lfsck_replace_lmv(env, com, lslr, lnr,
+                               rc = lfsck_replace_lmv(env, com, dir, lslr, lnr,
                                                       lmv, shard_idx, flags);
 
                        break;
@@ -747,7 +751,7 @@ none:
 
                /* The existing one has another possible slot,
                 * try it recursively. */
-               rc = lfsck_record_lmv(env, com, lnr, lmv, index,
+               rc = lfsck_record_lmv(env, com, dir, lnr, lmv, index,
                                      LSLF_BAD_INDEX2, flags, depth);
                *lmv = lrls->lrls_lmv;
                lnr->lnr_fid = lrls->lrls_fid;
@@ -787,7 +791,7 @@ conflict:
                         * mark the master MDT-object as read-only. The
                         * administrator can handle the conflict with
                         * more human knowledge. */
-                       rc = lfsck_remove_lmv(env, com, lnr);
+                       rc = lfsck_remove_lmv(env, com, dir, lnr);
                        break;
                case LSLF_BAD_INDEX2:
                        GOTO(out, rc = -EEXIST);
@@ -803,7 +807,7 @@ conflict:
                        /* The name entry claims an index that is conflict
                         * with a valid existing name entry, then try the
                         * index in the lmv recursively. */
-                       rc = lfsck_record_lmv(env, com, lnr, lmv, index,
+                       rc = lfsck_record_lmv(env, com, dir, lnr, lmv, index,
                                LSLF_BAD_INDEX2, lslr->lslr_flags, depth);
                        lmv->lmv_master_mdt_index = index;
                        if (rc == -ERANGE || rc == -EEXIST)
@@ -812,7 +816,7 @@ conflict:
                                 * not know how to resolve the conflict.
                                 * We will handle it as handle the case
                                 * of 'LSLF_NONE' vs 'LSLF_NONE'. */
-                               rc = lfsck_remove_lmv(env, com, lnr);
+                               rc = lfsck_remove_lmv(env, com, dir, lnr);
 
                        break;
                }
@@ -837,22 +841,12 @@ out:
 int lfsck_read_stripe_lmv(const struct lu_env *env, struct dt_object *obj,
                          struct lmv_mds_md_v1 *lmv)
 {
-       struct dt_object *bottom;
-       int               rc;
+       int rc;
 
-       /* Currently, we only store the LMV header on disk. It is the LOD's
-        * duty to iterate the master MDT-object's directory to compose the
-        * integrated LMV EA. But here, we only want to load the LMV header,
-        * so we need to bypass LOD to avoid unnecessary iteration in LOD. */
-       bottom = lu2dt(container_of0(obj->do_lu.lo_header->loh_layers.prev,
-                                    struct lu_object, lo_linkage));
-       if (unlikely(bottom == NULL))
-               return -ENOENT;
-
-       dt_read_lock(env, bottom, 0);
-       rc = dt_xattr_get(env, bottom, lfsck_buf_get(env, lmv, sizeof(*lmv)),
-                         XATTR_NAME_LMV, BYPASS_CAPA);
-       dt_read_unlock(env, bottom);
+       dt_read_lock(env, obj, 0);
+       rc = dt_xattr_get(env, obj, lfsck_buf_get(env, lmv, sizeof(*lmv)),
+                         XATTR_NAME_LMV);
+       dt_read_unlock(env, obj);
        if (rc != sizeof(*lmv))
                return rc > 0 ? -EINVAL : rc;
 
@@ -1005,7 +999,7 @@ int lfsck_namespace_update_lmv(const struct lu_env *env,
        struct lmv_mds_md_v1            *lmv4   = &info->lti_lmv4;
        struct lu_buf                   *buf    = &info->lti_buf;
        struct lfsck_instance           *lfsck  = com->lc_lfsck;
-       struct dt_device                *dev    = lfsck_obj2dt_dev(obj);
+       struct dt_device                *dev    = lfsck_obj2dev(obj);
        struct thandle                  *th     = NULL;
        struct lustre_handle             lh     = { 0 };
        int                              rc     = 0;
@@ -1049,7 +1043,7 @@ int lfsck_namespace_update_lmv(const struct lu_env *env,
        if (lfsck->li_bookmark_ram.lb_param & LPF_DRYRUN)
                GOTO(unlock, rc = 0);
 
-       rc = dt_xattr_set(env, obj, buf, XATTR_NAME_LMV, 0, th, BYPASS_CAPA);
+       rc = dt_xattr_set(env, obj, buf, XATTR_NAME_LMV, 0, th);
 
        GOTO(unlock, rc);
 
@@ -1118,7 +1112,7 @@ static int lfsck_allow_regenerate_master_lmv(const struct lu_env *env,
        snprintf(info->lti_tmpbuf, sizeof(info->lti_tmpbuf), DFID":%u",
                 PFID(cfid), cidx);
        rc = dt_lookup(env, obj, (struct dt_rec *)tfid,
-                      (const struct dt_key *)info->lti_tmpbuf, BYPASS_CAPA);
+                      (const struct dt_key *)info->lti_tmpbuf);
        if (rc != 0)
                RETURN(rc);
 
@@ -1127,7 +1121,7 @@ static int lfsck_allow_regenerate_master_lmv(const struct lu_env *env,
 
        args = lfsck->li_args_dir & ~(LUDA_VERIFY | LUDA_VERIFY_DRYRUN);
        iops = &obj->do_index_ops->dio_it;
-       di = iops->init(env, obj, args, BYPASS_CAPA);
+       di = iops->init(env, obj, args);
        if (IS_ERR(di))
                RETURN(PTR_ERR(di));
 
@@ -1197,7 +1191,7 @@ out:
  * \param[in] index    the MDT index on which the LFSCK instance to be notified
  *
  * \retval             positive number if nothing to be done
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 static int lfsck_namespace_notify_lmv_remote(const struct lu_env *env,
@@ -1233,7 +1227,7 @@ static int lfsck_namespace_notify_lmv_remote(const struct lu_env *env,
        lr = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
        memset(lr, 0, sizeof(*lr));
        lr->lr_event = event;
-       lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
+       lr->lr_index = lfsck_dev_idx(lfsck);
        lr->lr_active = LFSCK_TYPE_NAMESPACE;
        lr->lr_fid = *fid;
        lr->lr_flags = flags;
@@ -1264,7 +1258,7 @@ out:
  * \param[in] obj      pointer to the striped directory to be rescanned
  *
  * \retval             positive number if nothing to be done
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 int lfsck_namespace_notify_lmv_master_local(const struct lu_env *env,
@@ -1352,19 +1346,19 @@ int lfsck_namespace_notify_lmv_master_local(const struct lu_env *env,
  *
  * \param[in] env      pointer to the thread context
  * \param[in] com      pointer to the lfsck component
- * \param[in] dir      pointer to the object on which the LMV EA will be set
+ * \param[in] obj      pointer to the object on which the LMV EA will be set
  * \param[in] lmv      pointer to the buffer holding the new LMV EA
  * \param[in] cfid     the shard's FID used for verification
  * \param[in] cidx     the shard's index used for verification
  * \param[in] flags    to indicate which element(s) in the LMV EA will be set
  *
  * \retval             positive number if nothing to be done
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 static int lfsck_namespace_set_lmv_master(const struct lu_env *env,
                                          struct lfsck_component *com,
-                                         struct dt_object *dir,
+                                         struct dt_object *obj,
                                          struct lmv_mds_md_v1 *lmv,
                                          const struct lu_fid *cfid,
                                          __u32 cidx, __u32 flags)
@@ -1373,20 +1367,12 @@ static int lfsck_namespace_set_lmv_master(const struct lu_env *env,
        struct lmv_mds_md_v1            *lmv3   = &info->lti_lmv3;
        struct lu_seq_range             *range  = &info->lti_range;
        struct lfsck_instance           *lfsck  = com->lc_lfsck;
-       struct seq_server_site          *ss     =
-                       lu_site2seq(lfsck->li_bottom->dd_lu_dev.ld_site);
-       struct dt_object                *obj;
+       struct seq_server_site          *ss     = lfsck_dev_site(lfsck);
        struct lustre_handle             lh     = { 0 };
        int                              pidx   = -1;
        int                              rc     = 0;
        ENTRY;
 
-       /* Find the bottom object to bypass LOD when set LMV EA. */
-       obj = lu2dt(container_of0(dir->do_lu.lo_header->loh_layers.prev,
-                                 struct lu_object, lo_linkage));
-       if (unlikely(obj == NULL))
-               RETURN(-ENOENT);
-
        fld_range_set_mdt(range);
        rc = fld_server_lookup(env, ss->ss_server_fld,
                               fid_seq(lfsck_dto2fid(obj)), range);
@@ -1481,7 +1467,7 @@ log:
  * \param[in] name     the name of the bad name hash
  *
  * \retval             positive number if nothing to be done
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 int lfsck_namespace_repair_bad_name_hash(const struct lu_env *env,
@@ -1499,7 +1485,7 @@ int lfsck_namespace_repair_bad_name_hash(const struct lu_env *env,
        ENTRY;
 
        rc = dt_lookup(env, shard, (struct dt_rec *)pfid,
-                      (const struct dt_key *)dotdot, BYPASS_CAPA);
+                      (const struct dt_key *)dotdot);
        if (rc != 0 || !fid_is_sane(pfid))
                GOTO(log, rc);
 
@@ -1507,6 +1493,12 @@ int lfsck_namespace_repair_bad_name_hash(const struct lu_env *env,
        if (IS_ERR(parent))
                GOTO(log, rc = PTR_ERR(parent));
 
+       if (unlikely(!dt_object_exists(parent)))
+               /* The parent object was previously accessed when verifying
+                * the slave LMV EA.  If this condition is true it is because
+                * the striped directory is being removed. */
+               GOTO(log, rc = 1);
+
        *lmv2 = llmv->ll_lmv;
        lmv2->lmv_hash_type = LMV_HASH_TYPE_UNKNOWN | LMV_HASH_FLAG_BAD_TYPE;
        rc = lfsck_namespace_set_lmv_master(env, com, parent, lmv2,
@@ -1520,7 +1512,7 @@ log:
        CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant found bad name hash "
               "on the MDT %x, parent "DFID", name %s, shard_%x "DFID
               ": rc = %d\n",
-              lfsck_lfsck2name(lfsck), lfsck_dev_idx(lfsck->li_bottom),
+              lfsck_lfsck2name(lfsck), lfsck_dev_idx(lfsck),
               PFID(pfid), name, llmv->ll_lmv.lmv_master_mdt_index,
               PFID(lfsck_dto2fid(shard)), rc);
 
@@ -1592,7 +1584,7 @@ int lfsck_namespace_scan_shard(const struct lu_env *env,
 
        args = lfsck->li_args_dir & ~(LUDA_VERIFY | LUDA_VERIFY_DRYRUN);
        iops = &child->do_index_ops->dio_it;
-       di = iops->init(env, child, args, BYPASS_CAPA);
+       di = iops->init(env, child, args);
        if (IS_ERR(di))
                GOTO(out, rc = PTR_ERR(di));
 
@@ -1627,7 +1619,7 @@ int lfsck_namespace_scan_shard(const struct lu_env *env,
                        ns->ln_flags |= LF_INCONSISTENT;
                        rc = lfsck_namespace_repair_bad_name_hash(env, com,
                                                child, llmv, ent->lde_name);
-                       if (rc >= 0)
+                       if (rc == 0)
                                ns->ln_name_hash_repaired++;
                }
 
@@ -1673,7 +1665,8 @@ out:
  * \param[in] obj      pointer to the object which LMV EA will be checked
  * \param[in] llmv     pointer to buffer holding the slave LMV EA
  *
- * \retval             zero for succeed
+ * \retval             positive number if nothing to be done
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 int lfsck_namespace_verify_stripe_slave(const struct lu_env *env,
@@ -1702,7 +1695,7 @@ int lfsck_namespace_verify_stripe_slave(const struct lu_env *env,
        }
 
        rc = dt_lookup(env, obj, (struct dt_rec *)pfid,
-                      (const struct dt_key *)dotdot, BYPASS_CAPA);
+                      (const struct dt_key *)dotdot);
        if (rc != 0 || !fid_is_sane(pfid)) {
                rc = lfsck_namespace_trace_update(env, com, cfid,
                                        LNTF_UNCERTAIN_LMV, true);
@@ -1710,7 +1703,7 @@ int lfsck_namespace_verify_stripe_slave(const struct lu_env *env,
                GOTO(out, rc);
        }
 
-       parent = lfsck_object_find(env, lfsck, pfid);
+       parent = lfsck_object_find_bottom(env, lfsck, pfid);
        if (IS_ERR(parent)) {
                rc = lfsck_namespace_trace_update(env, com, cfid,
                                        LNTF_UNCERTAIN_LMV, true);
@@ -1718,6 +1711,9 @@ int lfsck_namespace_verify_stripe_slave(const struct lu_env *env,
                GOTO(out, rc);
        }
 
+       if (unlikely(!dt_object_exists(parent)))
+               GOTO(out, rc = 1);
+
        if (unlikely(!dt_try_as_dir(env, parent)))
                GOTO(out, rc = -ENOTDIR);
 
@@ -1778,7 +1774,7 @@ int lfsck_namespace_verify_stripe_slave(const struct lu_env *env,
        }
 
        rc = dt_lookup(env, parent, (struct dt_rec *)&tfid,
-                      (const struct dt_key *)name2, BYPASS_CAPA);
+                      (const struct dt_key *)name2);
        if (rc != 0 || !lu_fid_eq(cfid, &tfid))
                rc = lfsck_namespace_trace_update(env, com, cfid,
                                                  LNTF_UNCERTAIN_LMV, true);
@@ -1815,7 +1811,7 @@ out:
  * \param[in] lnr      pointer to the namespace request that contains the
  *                     striped directory or the shard
  *
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
@@ -1828,11 +1824,12 @@ int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
        struct lfsck_lmv                *llmv   = lnr->lnr_lmv;
        struct lmv_mds_md_v1            *lmv    = &llmv->ll_lmv;
        struct lmv_mds_md_v1            *lmv2   = &info->lti_lmv2;
-       struct dt_object                *dir    = lnr->lnr_obj;
-       const struct lu_fid             *pfid   = lfsck_dto2fid(dir);
+       struct lfsck_assistant_object   *lso    = lnr->lnr_lar.lar_parent;
+       const struct lu_fid             *pfid   = &lso->lso_fid;
+       struct dt_object                *dir    = NULL;
+       struct dt_object                *obj    = NULL;
        struct lu_seq_range             *range  = &info->lti_range;
-       struct seq_server_site          *ss     =
-                       lu_site2seq(lfsck->li_bottom->dd_lu_dev.ld_site);
+       struct seq_server_site          *ss     = lfsck_dev_site(lfsck);
        __u32                            stripe_count;
        __u32                            hash_type;
        int                              rc     = 0;
@@ -1842,8 +1839,7 @@ int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
        if (llmv->ll_lmv_slave) {
                if (llmv->ll_lmv_verified) {
                        ns->ln_striped_shards_scanned++;
-                       lfsck_namespace_trace_update(env, com,
-                                       lfsck_dto2fid(dir),
+                       lfsck_namespace_trace_update(env, com, pfid,
                                        LNTF_UNCERTAIN_LMV |
                                        LNTF_RECHECK_NAME_HASH, false);
                }
@@ -1892,6 +1888,15 @@ int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
        }
 
        if (llmv->ll_lmv_updated) {
+               if (dir == NULL) {
+                       dir = lfsck_assistant_object_load(env, lfsck, lso);
+                       if (IS_ERR(dir)) {
+                               rc = PTR_ERR(dir);
+
+                               RETURN(rc == -ENOENT ? 0 : rc);
+                       }
+               }
+
                lmv->lmv_layout_version++;
                rc = lfsck_namespace_update_lmv(env, com, dir, lmv, false);
                if (rc != 0)
@@ -1903,7 +1908,6 @@ int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
 
        fld_range_set_mdt(range);
        for (i = 0; i <= llmv->ll_max_filled_off; i++) {
-               struct dt_object *obj = NULL;
                struct lfsck_slave_lmv_rec *lslr = llmv->ll_lslr + i;
                const struct lu_fid *cfid = &lslr->lslr_fid;
                const struct lu_name *cname;
@@ -1930,8 +1934,18 @@ int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
 
                obj = lfsck_object_find_bottom_nowait(env, lfsck, cfid);
                if (IS_ERR(obj)) {
-                       if (lfsck_is_dead_obj(dir))
-                               RETURN(0);
+                       if (dir == NULL) {
+                               dir = lfsck_assistant_object_load(env, lfsck,
+                                                                 lso);
+                               if (IS_ERR(dir)) {
+                                       if (PTR_ERR(dir) == -ENOENT)
+                                               RETURN(0);
+
+                                       dir = NULL;
+                               }
+                       } else if (lfsck_is_dead_obj(dir)) {
+                               GOTO(out, rc = 0);
+                       }
 
                        rc1 = PTR_ERR(obj);
                        goto next;
@@ -1995,7 +2009,21 @@ int lfsck_namespace_striped_dir_rescan(const struct lu_env *env,
 
 repair:
                if (create) {
-                       rc1 = lfsck_namespace_repair_dangling(env, com,
+                       if (dir == NULL) {
+                               dir = lfsck_assistant_object_load(env, lfsck,
+                                                                 lso);
+                               if (IS_ERR(dir)) {
+                                       rc1 = PTR_ERR(dir);
+
+                                       if (rc1 == -ENOENT)
+                                               GOTO(out, rc = 0);
+
+                                       dir = NULL;
+                                       goto next;
+                               }
+                       }
+
+                       rc1 = lfsck_namespace_repair_dangling(env, com, dir,
                                                              obj, lnr);
                        if (rc1 >= 0) {
                                create_repaired = true;
@@ -2060,6 +2088,20 @@ repair:
                }
 
                if (rename) {
+                       if (dir == NULL) {
+                               dir = lfsck_assistant_object_load(env, lfsck,
+                                                                 lso);
+                               if (IS_ERR(dir)) {
+                                       rc1 = PTR_ERR(dir);
+
+                                       if (rc1 == -ENOENT)
+                                               GOTO(out, rc = 0);
+
+                                       dir = NULL;
+                                       goto next;
+                               }
+                       }
+
                        rc1 = lfsck_namespace_repair_dirent(env, com, dir, obj,
                                        info->lti_tmpbuf2, lnr->lnr_name,
                                        lnr->lnr_type, true, false);
@@ -2084,6 +2126,20 @@ repair:
                        if (rc1 != 0)
                                goto next;
 
+                       if (dir == NULL) {
+                               dir = lfsck_assistant_object_load(env, lfsck,
+                                                                 lso);
+                               if (IS_ERR(dir)) {
+                                       rc1 = PTR_ERR(dir);
+
+                                       if (rc1 == -ENOENT)
+                                               GOTO(out, rc = 0);
+
+                                       dir = NULL;
+                                       goto next;
+                               }
+                       }
+
                        rc1 = linkea_add_buf(&ldata, cname, lfsck_dto2fid(dir));
                        if (rc1 != 0)
                                goto next;
@@ -2091,12 +2147,12 @@ repair:
                        rc1 = lfsck_ibits_lock(env, lfsck, obj, &lh,
                                               MDS_INODELOCK_UPDATE |
                                               MDS_INODELOCK_XATTR, LCK_EX);
-                       lfsck_ibits_unlock(&lh, LCK_EX);
                        if (rc1 != 0)
                                goto next;
 
                        rc1 = lfsck_namespace_rebuild_linkea(env, com, obj,
                                                             &ldata);
+                       lfsck_ibits_unlock(&lh, LCK_EX);
                        if (rc1 >= 0) {
                                linkea_repaired = true;
                                if (rc1 > 0)
@@ -2117,8 +2173,10 @@ next:
                      repair_lmvea ? "yes" : "no",
                      lmvea_repaired ? "yes" : "no", rc1);
 
-               if (obj != NULL && !IS_ERR(obj))
+               if (obj != NULL && !IS_ERR(obj)) {
                        lfsck_object_put(env, obj);
+                       obj = NULL;
+               }
 
                if (rc1 < 0) {
                        rc = rc1;
@@ -2126,7 +2184,16 @@ next:
                }
        }
 
-       RETURN(rc);
+       GOTO(out, rc);
+
+out:
+       if (obj != NULL && !IS_ERR(obj))
+               lfsck_object_put(env, obj);
+
+       if (dir != NULL && !IS_ERR(dir))
+               lfsck_object_put(env, dir);
+
+       return rc;
 }
 
 /**
@@ -2175,7 +2242,7 @@ next:
  * \param[in] lnr      pointer to the namespace request that contains the
  *                     shard's name, parent object, parent's LMV, and ect.
  *
- * \retval             zero for succeed
+ * \retval             zero for success
  * \retval             negative error number on failure
  */
 int lfsck_namespace_handle_striped_master(const struct lu_env *env,
@@ -2187,8 +2254,9 @@ int lfsck_namespace_handle_striped_master(const struct lu_env *env,
        struct lfsck_instance      *lfsck       = com->lc_lfsck;
        struct lfsck_namespace     *ns          = com->lc_file_ram;
        struct lfsck_lmv           *llmv        = lnr->lnr_lmv;
-       struct dt_object           *dir         = lnr->lnr_obj;
-       const struct lu_fid        *pfid        = lfsck_dto2fid(dir);
+       struct lfsck_assistant_object *lso      = lnr->lnr_lar.lar_parent;
+       const struct lu_fid        *pfid        = &lso->lso_fid;
+       struct dt_object           *dir;
        struct dt_object           *obj         = NULL;
        struct dt_device           *dev         = NULL;
        int                         shard_idx   = 0;
@@ -2202,15 +2270,22 @@ int lfsck_namespace_handle_striped_master(const struct lu_env *env,
        if (unlikely(llmv->ll_ignore))
                RETURN(0);
 
+       dir = lfsck_assistant_object_load(env, lfsck, lso);
+       if (IS_ERR(dir)) {
+               rc = PTR_ERR(dir);
+
+               RETURN(rc == -ENOENT ? 0 : rc);
+       }
+
        shard_idx = lfsck_find_mdt_idx_by_fid(env, lfsck, &lnr->lnr_fid);
        if (shard_idx < 0)
                GOTO(fail_lmv, rc = shard_idx);
 
-       if (shard_idx == lfsck_dev_idx(lfsck->li_bottom)) {
+       if (shard_idx == lfsck_dev_idx(lfsck)) {
                if (unlikely(strcmp(lnr->lnr_name, dotdot) == 0))
                        GOTO(out, rc = 0);
 
-               dev = lfsck->li_next;
+               dev = lfsck->li_bottom;
        } else {
                struct lfsck_tgt_desc *ltd;
 
@@ -2259,7 +2334,7 @@ dangling:
                if (rc == 0) {
                        memset(lmv, 0, sizeof(*lmv));
                        lmv->lmv_magic = LMV_MAGIC;
-                       rc = lfsck_record_lmv(env, com, lnr, lmv, stripe,
+                       rc = lfsck_record_lmv(env, com, dir, lnr, lmv, stripe,
                                              LSLF_DANGLING, LSLF_NONE, &depth);
                }
 
@@ -2282,10 +2357,10 @@ dangling:
                goto dangling;
 
        if (rc == -ENODATA)
-               rc = lfsck_record_lmv(env, com, lnr, lmv, stripe,
+               rc = lfsck_record_lmv(env, com, dir, lnr, lmv, stripe,
                                      LSLF_NO_LMVEA, LSLF_NONE, &depth);
        else if (rc == 0)
-               rc = lfsck_record_lmv(env, com, lnr, lmv, stripe,
+               rc = lfsck_record_lmv(env, com, dir, lnr, lmv, stripe,
                                      lmv->lmv_master_mdt_index != stripe ?
                                      LSLF_BAD_INDEX1 : LSLF_NONE, LSLF_NONE,
                                      &depth);
@@ -2322,13 +2397,12 @@ out:
                CDEBUG(D_LFSCK, "%s: namespace LFSCK assistant fail to handle "
                       "the shard: "DFID", parent "DFID", name %.*s: rc = %d\n",
                       lfsck_lfsck2name(lfsck), PFID(&lnr->lnr_fid),
-                      PFID(lfsck_dto2fid(lnr->lnr_obj)),
-                      lnr->lnr_namelen, lnr->lnr_name, rc);
+                      PFID(pfid), lnr->lnr_namelen, lnr->lnr_name, rc);
 
                if ((rc == -ENOTCONN || rc == -ESHUTDOWN || rc == -EREMCHG ||
                     rc == -ETIMEDOUT || rc == -EHOSTDOWN ||
                     rc == -EHOSTUNREACH || rc == -EINPROGRESS) &&
-                   dev != NULL && dev != lfsck->li_next)
+                   dev != NULL && dev != lfsck->li_bottom)
                        lfsck_lad_set_bitmap(env, com, shard_idx);
 
                if (!(lfsck->li_bookmark_ram.lb_param & LPF_FAILOUT))
@@ -2355,5 +2429,7 @@ out:
        if (obj != NULL && !IS_ERR(obj))
                lfsck_object_put(env, obj);
 
+       lfsck_object_put(env, dir);
+
        return rc;
 }