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LU-8569 lfsck: cleanup lfsck requests list before exit
[fs/lustre-release.git] / lustre / lfsck / lfsck_engine.c
index 1b0ce1e..f5b5e70 100644 (file)
@@ -20,7 +20,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright (c) 2013, 2014, Intel Corporation.
+ * Copyright (c) 2013, 2015, Intel Corporation.
  */
 /*
  * lustre/lfsck/lfsck_engine.c
@@ -93,64 +93,6 @@ static void lfsck_di_dir_put(const struct lu_env *env, struct lfsck_instance *lf
        iops->put(env, di);
 }
 
-static int lfsck_update_lma(const struct lu_env *env,
-                           struct lfsck_instance *lfsck, struct dt_object *obj)
-{
-       struct lfsck_thread_info        *info   = lfsck_env_info(env);
-       struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
-       struct dt_device                *dt     = lfsck->li_bottom;
-       struct lustre_mdt_attrs         *lma    = &info->lti_lma;
-       struct lu_buf                   *buf;
-       struct thandle                  *th;
-       int                              fl;
-       int                              rc;
-       ENTRY;
-
-       if (bk->lb_param & LPF_DRYRUN)
-               RETURN(0);
-
-       buf = lfsck_buf_get(env, info->lti_lma_old, LMA_OLD_SIZE);
-       rc = dt_xattr_get(env, obj, buf, XATTR_NAME_LMA, BYPASS_CAPA);
-       if (rc < 0) {
-               if (rc != -ENODATA)
-                       RETURN(rc);
-
-               fl = LU_XATTR_CREATE;
-               lustre_lma_init(lma, lfsck_dto2fid(obj), LMAC_FID_ON_OST, 0);
-       } else {
-               if (rc != LMA_OLD_SIZE && rc != sizeof(struct lustre_mdt_attrs))
-                       RETURN(-EINVAL);
-
-               fl = LU_XATTR_REPLACE;
-               lustre_lma_swab(lma);
-               lustre_lma_init(lma, lfsck_dto2fid(obj),
-                               lma->lma_compat | LMAC_FID_ON_OST,
-                               lma->lma_incompat);
-       }
-       lustre_lma_swab(lma);
-
-       th = dt_trans_create(env, dt);
-       if (IS_ERR(th))
-               RETURN(PTR_ERR(th));
-
-       buf = lfsck_buf_get(env, lma, sizeof(*lma));
-       rc = dt_declare_xattr_set(env, obj, buf, XATTR_NAME_LMA, fl, th);
-       if (rc != 0)
-               GOTO(stop, rc);
-
-       rc = dt_trans_start(env, dt, th);
-       if (rc != 0)
-               GOTO(stop, rc);
-
-       rc = dt_xattr_set(env, obj, buf, XATTR_NAME_LMA, fl, th, BYPASS_CAPA);
-
-       GOTO(stop, rc);
-
-stop:
-       dt_trans_stop(env, dt, th);
-       return rc;
-}
-
 static int lfsck_parent_fid(const struct lu_env *env, struct dt_object *obj,
                            struct lu_fid *fid)
 {
@@ -159,7 +101,7 @@ static int lfsck_parent_fid(const struct lu_env *env, struct dt_object *obj,
                return -ENOTDIR;
 
        return dt_lookup(env, obj, (struct dt_rec *)fid,
-                        (const struct dt_key *)"..", BYPASS_CAPA);
+                        (const struct dt_key *)"..");
 }
 
 /**
@@ -194,9 +136,8 @@ static int lfsck_needs_scan_dir(const struct lu_env *env,
        struct lfsck_thread_info *info    = lfsck_env_info(env);
        struct lu_fid            *fid     = &info->lti_fid;
        struct lu_seq_range      *range   = &info->lti_range;
-       struct dt_device         *dev     = lfsck->li_bottom;
-       struct seq_server_site   *ss      = lu_site2seq(dev->dd_lu_dev.ld_site);
-       __u32                     idx     = lfsck_dev_idx(dev);
+       struct seq_server_site   *ss      = lfsck_dev_site(lfsck);
+       __u32                     idx     = lfsck_dev_idx(lfsck);
        int                       depth   = 0;
        int                       rc      = 0;
 
@@ -237,7 +178,7 @@ static int lfsck_needs_scan_dir(const struct lu_env *env,
                        return 1;
 
                if (obj == NULL) {
-                       obj = lfsck_object_find(env, lfsck, fid);
+                       obj = lfsck_object_find_bottom(env, lfsck, fid);
                        if (IS_ERR(obj))
                                return PTR_ERR(obj);
 
@@ -254,8 +195,7 @@ static int lfsck_needs_scan_dir(const struct lu_env *env,
                }
 
                rc = dt_xattr_get(env, obj,
-                                 lfsck_buf_get(env, NULL, 0), XATTR_NAME_LINK,
-                                 BYPASS_CAPA);
+                                 lfsck_buf_get(env, NULL, 0), XATTR_NAME_LINK);
                dt_read_unlock(env, obj);
                if (rc >= 0)
                        GOTO(out, rc = 1);
@@ -327,25 +267,14 @@ static int lfsck_load_stripe_lmv(const struct lu_env *env,
                        RETURN(-ENOMEM);
                }
 
-               /* Find the object against the bottom device. */
-               obj = lfsck_object_find_by_dev(env, lfsck->li_bottom,
-                                              lfsck_dto2fid(obj));
-               if (IS_ERR(obj)) {
-                       OBD_FREE_LARGE(lslr, sizeof(*lslr) * stripes);
-                       OBD_FREE_PTR(llmv);
-
-                       RETURN(PTR_ERR(obj));
-               }
-
                llmv->ll_stripes_allocated = stripes;
                llmv->ll_hash_type = LMV_HASH_TYPE_UNKNOWN;
                llmv->ll_lslr = lslr;
-               lfsck->li_obj_dir = obj;
        } else {
                llmv->ll_lmv_slave = 1;
-               lfsck->li_obj_dir = lfsck_object_get(obj);
        }
 
+       lfsck->li_obj_dir = lfsck_object_get(obj);
        llmv->ll_lmv = *lmv;
        atomic_set(&llmv->ll_ref, 1);
        lfsck->li_lmv = llmv;
@@ -428,7 +357,7 @@ int lfsck_open_dir(const struct lu_env *env,
        }
 
        iops = &obj->do_index_ops->dio_it;
-       di = iops->init(env, obj, lfsck->li_args_dir, BYPASS_CAPA);
+       di = iops->init(env, obj, lfsck->li_args_dir);
        if (IS_ERR(di))
                GOTO(out, rc = PTR_ERR(di));
 
@@ -530,7 +459,7 @@ static int lfsck_prep(const struct lu_env *env, struct lfsck_instance *lfsck,
                GOTO(out, rc = 0);
 
        /* Find the directory for namespace-based traverse. */
-       obj = lfsck_object_find(env, lfsck, &pos->lp_dir_parent);
+       obj = lfsck_object_find_bottom(env, lfsck, &pos->lp_dir_parent);
        if (IS_ERR(obj))
                RETURN(PTR_ERR(obj));
 
@@ -621,13 +550,14 @@ out:
 
 static int lfsck_exec_dir(const struct lu_env *env,
                          struct lfsck_instance *lfsck,
+                         struct lfsck_assistant_object *lso,
                          struct lu_dirent *ent, __u16 type)
 {
        struct lfsck_component *com;
        int                     rc;
 
        list_for_each_entry(com, &lfsck->li_list_scan, lc_link) {
-               rc = com->lc_ops->lfsck_exec_dir(env, com, ent, type);
+               rc = com->lc_ops->lfsck_exec_dir(env, com, lso, ent, type);
                if (rc != 0)
                        return rc;
        }
@@ -756,6 +686,7 @@ static int lfsck_master_dir_engine(const struct lu_env *env,
                        (struct lu_dirent *)info->lti_key;
        struct lfsck_bookmark           *bk     = &lfsck->li_bookmark_ram;
        struct ptlrpc_thread            *thread = &lfsck->li_thread;
+       struct lfsck_assistant_object   *lso    = NULL;
        int                              rc;
        __u16                            type;
        ENTRY;
@@ -764,11 +695,11 @@ static int lfsck_master_dir_engine(const struct lu_env *env,
                if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY2, cfs_fail_val) &&
                    unlikely(!thread_is_running(thread))) {
                        CDEBUG(D_LFSCK, "%s: scan dir exit for engine stop, "
-                              "parent "DFID", cookie "LPX64"\n",
+                              "parent "DFID", cookie %#llx\n",
                               lfsck_lfsck2name(lfsck),
                               PFID(lfsck_dto2fid(dir)), lfsck->li_cookie_dir);
 
-                       RETURN(0);
+                       GOTO(out, rc = 0);
                }
 
                lfsck->li_new_scanned++;
@@ -780,57 +711,84 @@ static int lfsck_master_dir_engine(const struct lu_env *env,
 
                if (rc != 0) {
                        CDEBUG(D_LFSCK, "%s: scan dir failed at rec(), "
-                              "parent "DFID", cookie "LPX64": rc = %d\n",
+                              "parent "DFID", cookie %#llx: rc = %d\n",
                               lfsck_lfsck2name(lfsck),
                               PFID(lfsck_dto2fid(dir)),
                               lfsck->li_cookie_dir, rc);
                        lfsck_fail(env, lfsck, true);
                        if (bk->lb_param & LPF_FAILOUT)
-                               RETURN(rc);
+                               GOTO(out, rc);
                        else
                                goto checkpoint;
                }
 
-               if (ent->lde_attrs & LUDA_IGNORE &&
-                   strcmp(ent->lde_name, dotdot) != 0)
+               if (ent->lde_attrs & LUDA_IGNORE)
                        goto checkpoint;
 
+               /* skip dot entry. */
+               if (ent->lde_namelen == 1 && ent->lde_name[0] == '.')
+                       goto checkpoint;
+
+               if (lso == NULL) {
+                       lso = lfsck_assistant_object_init(env,
+                               lfsck_dto2fid(dir), NULL,
+                               lfsck->li_pos_current.lp_oit_cookie, true);
+                       if (IS_ERR(lso)) {
+                               if (bk->lb_param & LPF_FAILOUT)
+                                       RETURN(PTR_ERR(lso));
+
+                               lso = NULL;
+                               goto checkpoint;
+                       }
+               }
+
                /* The type in the @ent structure may has been overwritten,
                 * so we need to pass the @type parameter independently. */
-               rc = lfsck_exec_dir(env, lfsck, ent, type);
+               rc = lfsck_exec_dir(env, lfsck, lso, ent, type);
                if (rc != 0 && bk->lb_param & LPF_FAILOUT)
-                       RETURN(rc);
+                       GOTO(out, rc);
 
 checkpoint:
                rc = lfsck_checkpoint(env, lfsck);
                if (rc != 0 && bk->lb_param & LPF_FAILOUT)
-                       RETURN(rc);
+                       GOTO(out, rc);
 
                /* Rate control. */
                lfsck_control_speed(lfsck);
                if (unlikely(!thread_is_running(thread))) {
                        CDEBUG(D_LFSCK, "%s: scan dir exit for engine stop, "
-                              "parent "DFID", cookie "LPX64"\n",
+                              "parent "DFID", cookie %#llx\n",
                               lfsck_lfsck2name(lfsck),
                               PFID(lfsck_dto2fid(dir)),
                               lfsck->li_cookie_dir);
-                       RETURN(0);
+                       GOTO(out, rc = 0);
                }
 
                if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_FATAL2)) {
                        spin_lock(&lfsck->li_lock);
                        thread_set_flags(thread, SVC_STOPPING);
                        spin_unlock(&lfsck->li_lock);
-                       RETURN(-EINVAL);
+                       GOTO(out, rc = -EINVAL);
                }
 
                rc = iops->next(env, di);
+               if (rc < 0)
+                       CDEBUG(D_LFSCK, "%s dir engine fail to locate next "
+                              "for the directory "DFID": rc = %d\n",
+                              lfsck_lfsck2name(lfsck),
+                              PFID(&lfsck->li_pos_current.lp_dir_parent), rc);
        } while (rc == 0);
 
        if (rc > 0 && !lfsck->li_oit_over)
                lfsck_close_dir(env, lfsck, rc);
 
-       RETURN(rc);
+       GOTO(out, rc);
+
+out:
+       if (lso != NULL)
+               lfsck_assistant_object_put(env, lso);
+
+       return rc;
 }
 
 /**
@@ -865,9 +823,8 @@ static int lfsck_master_oit_engine(const struct lu_env *env,
        struct lu_fid            *fid   = &info->lti_fid;
        struct lfsck_bookmark    *bk    = &lfsck->li_bookmark_ram;
        struct ptlrpc_thread     *thread = &lfsck->li_thread;
-       struct dt_device         *dev   = lfsck->li_bottom;
-       struct seq_server_site   *ss    = lu_site2seq(dev->dd_lu_dev.ld_site);
-       __u32                    idx    = lfsck_dev_idx(dev);
+       struct seq_server_site   *ss    = lfsck_dev_site(lfsck);
+       __u32                    idx    = lfsck_dev_idx(lfsck);
        int                      rc;
        ENTRY;
 
@@ -876,7 +833,6 @@ static int lfsck_master_oit_engine(const struct lu_env *env,
 
        do {
                struct dt_object *target;
-               bool              update_lma = false;
 
                if (lfsck->li_di_dir != NULL) {
                        rc = lfsck_master_dir_engine(env, lfsck);
@@ -890,7 +846,7 @@ static int lfsck_master_oit_engine(const struct lu_env *env,
                if (CFS_FAIL_TIMEOUT(OBD_FAIL_LFSCK_DELAY1, cfs_fail_val) &&
                    unlikely(!thread_is_running(thread))) {
                        CDEBUG(D_LFSCK, "%s: OIT scan exit for engine stop, "
-                              "cookie "LPU64"\n",
+                              "cookie %llu\n",
                               lfsck_lfsck2name(lfsck), iops->store(env, di));
 
                        RETURN(0);
@@ -933,18 +889,35 @@ static int lfsck_master_oit_engine(const struct lu_env *env,
                                goto checkpoint;
                }
 
+               if (unlikely(!fid_is_sane(fid))) {
+                       CDEBUG(D_LFSCK, "%s: OIT scan find invalid FID "DFID
+                              ", skip it\n",
+                              lfsck_lfsck2name(lfsck), PFID(fid));
+                       goto checkpoint;
+               }
+
                if (fid_is_idif(fid)) {
                        __u32 idx1 = fid_idif_ost_idx(fid);
 
                        LASSERT(!lfsck->li_master);
 
-                       /* It is an old format device, update the LMA. */
                        if (idx != idx1) {
                                struct ost_id *oi = &info->lti_oi;
 
+                               if (unlikely(idx1 != 0)) {
+                                       CDEBUG(D_LFSCK, "%s: invalid IDIF "DFID
+                                              ", not match device index %u\n",
+                                              lfsck_lfsck2name(lfsck),
+                                              PFID(fid), idx);
+
+                                       goto checkpoint;
+                               }
+
+                               /* rebuild the IDIF with index to
+                                * avoid double instances for the
+                                * same object. */
                                fid_to_ostid(fid, oi);
                                ostid_to_fid(fid, oi, idx);
-                               update_lma = true;
                        }
                } else if (!fid_is_norm(fid) && !fid_is_igif(fid) &&
                           !fid_is_last_id(fid) &&
@@ -973,10 +946,10 @@ static int lfsck_master_oit_engine(const struct lu_env *env,
                        }
                }
 
-               target = lfsck_object_find(env, lfsck, fid);
+               target = lfsck_object_find_bottom(env, lfsck, fid);
                if (IS_ERR(target)) {
                        CDEBUG(D_LFSCK, "%s: OIT scan failed at find target "
-                              DFID", cookie "LPU64": rc = %d\n",
+                              DFID", cookie %llu: rc = %d\n",
                               lfsck_lfsck2name(lfsck), PFID(fid),
                               iops->store(env, di), rc);
                        lfsck_fail(env, lfsck, true);
@@ -986,18 +959,9 @@ static int lfsck_master_oit_engine(const struct lu_env *env,
                                goto checkpoint;
                }
 
-               if (dt_object_exists(target)) {
-                       if (update_lma) {
-                               rc = lfsck_update_lma(env, lfsck, target);
-                               if (rc != 0)
-                                       CDEBUG(D_LFSCK, "%s: fail to update "
-                                              "LMA for "DFID": rc = %d\n",
-                                              lfsck_lfsck2name(lfsck),
-                                              PFID(lfsck_dto2fid(target)), rc);
-                       }
-                       if (rc == 0)
-                               rc = lfsck_exec_oit(env, lfsck, target);
-               }
+               if (dt_object_exists(target))
+                       rc = lfsck_exec_oit(env, lfsck, target);
+
                lfsck_object_put(env, target);
                if (rc != 0 && bk->lb_param & LPF_FAILOUT)
                        RETURN(rc);
@@ -1022,10 +986,14 @@ checkpoint:
                        lfsck->li_oit_over = 1;
                else if (likely(rc == 0))
                        lfsck->li_current_oit_processed = 0;
+               else
+                       CDEBUG(D_LFSCK, "%s oit engine fail to locate next at "
+                              "%llu: rc = %d\n", lfsck_lfsck2name(lfsck),
+                              iops->store(env, di), rc);
 
                if (unlikely(!thread_is_running(thread))) {
                        CDEBUG(D_LFSCK, "%s: OIT scan exit for engine stop, "
-                              "cookie "LPU64"\n", lfsck_lfsck2name(lfsck),
+                              "cookie %llu\n", lfsck_lfsck2name(lfsck),
                               iops->store(env, di));
                        RETURN(0);
                }
@@ -1047,6 +1015,18 @@ int lfsck_master_engine(void *args)
        int                       rc;
        ENTRY;
 
+       /* There will be some objects verification during the LFSCK start,
+        * such as the subsequent lfsck_verify_lpf(). Trigger low layer OI
+        * OI scrub before that to handle the potential inconsistence. */
+       oit_di = oit_iops->init(env, oit_obj, lfsck->li_args_oit);
+       if (IS_ERR(oit_di)) {
+               rc = PTR_ERR(oit_di);
+               CDEBUG(D_LFSCK, "%s: master engine fail to init iteration: "
+                      "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
+
+               GOTO(fini_args, rc);
+       }
+
        if (lfsck->li_master &&
            (!list_empty(&lfsck->li_list_scan) ||
             !list_empty(&lfsck->li_list_double_scan))) {
@@ -1062,15 +1042,6 @@ int lfsck_master_engine(void *args)
                               lfsck_lfsck2name(lfsck), rc);
        }
 
-       oit_di = oit_iops->init(env, oit_obj, lfsck->li_args_oit, BYPASS_CAPA);
-       if (IS_ERR(oit_di)) {
-               rc = PTR_ERR(oit_di);
-               CDEBUG(D_LFSCK, "%s: master engine fail to init iteration: "
-                      "rc = %d\n", lfsck_lfsck2name(lfsck), rc);
-
-               GOTO(fini_args, rc);
-       }
-
        spin_lock(&lfsck->li_lock);
        lfsck->li_di_oit = oit_di;
        spin_unlock(&lfsck->li_lock);
@@ -1079,7 +1050,7 @@ int lfsck_master_engine(void *args)
                GOTO(fini_oit, rc);
 
        CDEBUG(D_LFSCK, "LFSCK entry: oit_flags = %#x, dir_flags = %#x, "
-              "oit_cookie = "LPU64", dir_cookie = "LPX64", parent = "DFID
+              "oit_cookie = %llu, dir_cookie = %#llx, parent = "DFID
               ", pid = %d\n", lfsck->li_args_oit, lfsck->li_args_dir,
               lfsck->li_pos_checkpoint.lp_oit_cookie,
               lfsck->li_pos_checkpoint.lp_dir_cookie,
@@ -1104,8 +1075,9 @@ int lfsck_master_engine(void *args)
        else
                rc = 1;
 
+       lfsck_pos_fill(env, lfsck, &lfsck->li_pos_checkpoint, false);
        CDEBUG(D_LFSCK, "LFSCK exit: oit_flags = %#x, dir_flags = %#x, "
-              "oit_cookie = "LPU64", dir_cookie = "LPX64", parent = "DFID
+              "oit_cookie = %llu, dir_cookie = %#llx, parent = "DFID
               ", pid = %d, rc = %d\n", lfsck->li_args_oit, lfsck->li_args_dir,
               lfsck->li_pos_checkpoint.lp_oit_cookie,
               lfsck->li_pos_checkpoint.lp_dir_cookie,
@@ -1187,12 +1159,12 @@ static int lfsck_assistant_query_others(const struct lu_env *env,
 
        lad->lad_touch_gen++;
        memset(lr, 0, sizeof(*lr));
-       lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
        lr->lr_event = LE_QUERY;
        lr->lr_active = com->lc_type;
+
+       memset(laia, 0, sizeof(*laia));
        laia->laia_com = com;
        laia->laia_lr = lr;
-       laia->laia_shared = 0;
 
        if (!list_empty(&lad->lad_mdt_phase1_list)) {
                ltds = &lfsck->li_mdt_descs;
@@ -1304,11 +1276,12 @@ static int lfsck_assistant_notify_others(const struct lu_env *env,
        if (set == NULL)
                RETURN(-ENOMEM);
 
-       lr->lr_index = lfsck_dev_idx(lfsck->li_bottom);
+       lr->lr_index = lfsck_dev_idx(lfsck);
        lr->lr_active = com->lc_type;
+
+       memset(laia, 0, sizeof(*laia));
        laia->laia_com = com;
        laia->laia_lr = lr;
-       laia->laia_shared = 0;
 
        switch (lr->lr_event) {
        case LE_START:
@@ -1331,7 +1304,6 @@ static int lfsck_assistant_notify_others(const struct lu_env *env,
                        LASSERT(ltd != NULL);
 
                        laia->laia_ltd = ltd;
-                       ltd->ltd_layout_done = 0;
                        rc = lfsck_async_request(env, ltd->ltd_exp, lr, set,
                                        lfsck_async_interpret_common,
                                        laia, LFSCK_NOTIFY);
@@ -1362,7 +1334,7 @@ next:
                spin_lock(&ltds->ltd_lock);
                if (com->lc_type == LFSCK_TYPE_LAYOUT) {
                        cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
-                               ltd = LTD_TGT(ltds, idx);
+                               ltd = lfsck_ltd2tgt(ltds, idx);
                                LASSERT(ltd != NULL);
 
                                if (!list_empty(&ltd->ltd_layout_list))
@@ -1375,7 +1347,7 @@ next:
                        }
                } else {
                        cfs_foreach_bit(ltds->ltd_tgts_bitmap, idx) {
-                               ltd = LTD_TGT(ltds, idx);
+                               ltd = lfsck_ltd2tgt(ltds, idx);
                                LASSERT(ltd != NULL);
 
                                if (!list_empty(&ltd->ltd_namespace_list))
@@ -1526,7 +1498,7 @@ again:
 
                        *gen = lad->lad_touch_gen;
                        list_move_tail(list, &lad->lad_mdt_list);
-                       if (ltd->ltd_namespace_failed)
+                       if (ltd->ltd_synced_failures)
                                continue;
 
                        atomic_inc(&ltd->ltd_ref);
@@ -1614,6 +1586,7 @@ int lfsck_assistant_engine(void *args)
        }
 
        spin_lock(&lad->lad_lock);
+       lad->lad_task = current;
        thread_set_flags(athread, SVC_RUNNING);
        spin_unlock(&lad->lad_lock);
        wake_up_all(&mthread->t_ctl_waitq);
@@ -1624,7 +1597,7 @@ int lfsck_assistant_engine(void *args)
 
                        if (unlikely(lad->lad_exit ||
                                     !thread_is_running(mthread)))
-                               GOTO(cleanup1, rc = lad->lad_post_result);
+                               GOTO(cleanup, rc = lad->lad_post_result);
 
                        lar = list_entry(lad->lad_req_list.next,
                                         struct lfsck_assistant_req,
@@ -1641,10 +1614,7 @@ int lfsck_assistant_engine(void *args)
                        /* Wake up the main engine thread only when the list
                         * is empty or half of the prefetched items have been
                         * handled to avoid too frequent thread schedule. */
-                       if (lad->lad_prefetched == 0 ||
-                           (bk->lb_async_windows != 0 &&
-                            bk->lb_async_windows / 2 ==
-                            lad->lad_prefetched))
+                       if (lad->lad_prefetched <= (bk->lb_async_windows / 2))
                                wakeup = true;
                        spin_unlock(&lad->lad_lock);
                        if (wakeup)
@@ -1652,7 +1622,7 @@ int lfsck_assistant_engine(void *args)
 
                        lao->la_req_fini(env, lar);
                        if (rc < 0 && bk->lb_param & LPF_FAILOUT)
-                               GOTO(cleanup1, rc);
+                               GOTO(cleanup, rc);
                }
 
                l_wait_event(athread->t_ctl_waitq,
@@ -1663,7 +1633,7 @@ int lfsck_assistant_engine(void *args)
                             &lwi);
 
                if (unlikely(lad->lad_exit))
-                       GOTO(cleanup1, rc = lad->lad_post_result);
+                       GOTO(cleanup, rc = lad->lad_post_result);
 
                if (!list_empty(&lad->lad_req_list))
                        continue;
@@ -1673,23 +1643,23 @@ int lfsck_assistant_engine(void *args)
                               lfsck_lfsck2name(lfsck), lad->lad_name);
 
                        if (unlikely(lad->lad_exit))
-                               GOTO(cleanup1, rc = lad->lad_post_result);
+                               GOTO(cleanup, rc = lad->lad_post_result);
 
                        lad->lad_to_post = 0;
                        LASSERT(lad->lad_post_result > 0);
 
+                       /* Wakeup the master engine to go ahead. */
+                       wake_up_all(&mthread->t_ctl_waitq);
+
                        memset(lr, 0, sizeof(*lr));
                        lr->lr_event = LE_PHASE1_DONE;
                        lr->lr_status = lad->lad_post_result;
                        rc = lfsck_assistant_notify_others(env, com, lr);
-                       if (rc != 0)
-                               CDEBUG(D_LFSCK, "%s: LFSCK assistant failed to "
-                                      "notify others for %s post: rc = %d\n",
-                                      lfsck_lfsck2name(lfsck),
-                                      lad->lad_name, rc);
 
-                       /* Wakeup the master engine to go ahead. */
-                       wake_up_all(&mthread->t_ctl_waitq);
+                       CDEBUG(D_LFSCK, "%s: LFSCK assistant notified "
+                              "others for %s post: rc = %d\n",
+                              lfsck_lfsck2name(lfsck),
+                              lad->lad_name, rc);
                }
 
                if (lad->lad_to_double_scan) {
@@ -1717,7 +1687,7 @@ int lfsck_assistant_engine(void *args)
                               lfsck_lfsck2name(lfsck), rc2);
 
                        if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_DOUBLESCAN))
-                               GOTO(cleanup2, rc = 0);
+                               GOTO(cleanup, rc = 0);
 
                        while (lad->lad_in_double_scan) {
                                rc = lfsck_assistant_query_others(env, com);
@@ -1725,7 +1695,7 @@ int lfsck_assistant_engine(void *args)
                                        goto p2_next;
 
                                if (rc < 0)
-                                       GOTO(cleanup2, rc);
+                                       GOTO(cleanup, rc);
 
                                /* Pull LFSCK status on related targets once
                                 * per 30 seconds if we are not notified. */
@@ -1740,27 +1710,27 @@ int lfsck_assistant_engine(void *args)
 
                                if (unlikely(lad->lad_exit ||
                                             !thread_is_running(mthread)))
-                                       GOTO(cleanup2, rc = 0);
+                                       GOTO(cleanup, rc = 0);
 
                                if (rc == -ETIMEDOUT)
                                        continue;
 
                                if (rc < 0)
-                                       GOTO(cleanup2, rc);
+                                       GOTO(cleanup, rc);
 
 p2_next:
                                rc = lao->la_handler_p2(env, com);
                                if (rc != 0)
-                                       GOTO(cleanup2, rc);
+                                       GOTO(cleanup, rc);
 
                                if (unlikely(lad->lad_exit ||
                                             !thread_is_running(mthread)))
-                                       GOTO(cleanup2, rc = 0);
+                                       GOTO(cleanup, rc = 0);
                        }
                }
        }
 
-cleanup1:
+cleanup:
        /* Cleanup the unfinished requests. */
        spin_lock(&lad->lad_lock);
        if (rc < 0)
@@ -1769,6 +1739,7 @@ cleanup1:
        if (lad->lad_exit && lad->lad_post_result <= 0)
                lao->la_fill_pos(env, com, &lfsck->li_pos_checkpoint);
 
+       thread_set_flags(athread, SVC_STOPPING);
        while (!list_empty(&lad->lad_req_list)) {
                lar = list_entry(lad->lad_req_list.next,
                                 struct lfsck_assistant_req,
@@ -1784,7 +1755,6 @@ cleanup1:
        LASSERTF(lad->lad_prefetched == 0, "unmatched prefeteched objs %d\n",
                 lad->lad_prefetched);
 
-cleanup2:
        memset(lr, 0, sizeof(*lr));
        if (rc > 0) {
                lr->lr_event = LE_PHASE2_DONE;
@@ -1860,6 +1830,7 @@ fini:
        lad->lad_assistant_status = (rc1 != 0 ? rc1 : rc);
        thread_set_flags(athread, SVC_STOPPED);
        wake_up_all(&mthread->t_ctl_waitq);
+       lad->lad_task = NULL;
        spin_unlock(&lad->lad_lock);
 
        CDEBUG(D_LFSCK, "%s: %s LFSCK assistant thread exit: rc = %d\n",