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LU-4704 test: enable acl 974 and 2561 series test
[fs/lustre-release.git] / lustre / lfsck / lfsck_layout.c
index d2f7ae7..45247f2 100644 (file)
@@ -1049,7 +1049,8 @@ lfsck_layout_lastid_store(const struct lu_env *env,
                lastid = cpu_to_le64(lls->lls_lastid);
                rc = dt_declare_record_write(env, lls->lls_lastid_obj,
                                             lfsck_buf_get(env, &lastid,
-                                            sizeof(lastid)), pos, th);
+                                                          sizeof(lastid)),
+                                            pos, th);
                if (rc != 0)
                        goto stop;
 
@@ -1726,8 +1727,8 @@ static int lfsck_layout_extend_lovea(const struct lu_env *env,
                lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
                /* XXX: We cannot know the stripe size,
                 *      then use the default value (1 MB). */
-               lmm->lmm_stripe_size = cpu_to_le32(1024 * 1024);
-               lmm->lmm_layout_gen = cpu_to_le16(0);
+               lmm->lmm_stripe_size =
+                       cpu_to_le32(LOV_DESC_STRIPE_SIZE_DEFAULT);
                objs = &(lmm->lmm_objects[ea_off]);
        } else {
                __u16   count = le16_to_cpu(lmm->lmm_stripe_count);
@@ -1791,10 +1792,10 @@ static int lfsck_layout_update_pfid(const struct lu_env *env,
 
        pfid->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
        pfid->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
-       /* In fact, the ff_parent::f_ver is not the real parent FID::f_ver,
-        * instead, it is the OST-object index in its parent MDT-object
-        * layout EA. */
-       pfid->ff_parent.f_ver = cpu_to_le32(ea_off);
+       /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
+        * MDT-object's FID::f_ver, instead it is the OST-object index in its
+        * parent MDT-object's layout EA. */
+       pfid->ff_parent.f_stripe_idx = cpu_to_le32(ea_off);
        buf = lfsck_buf_get(env, pfid, sizeof(struct filter_fid));
 
        rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle);
@@ -1846,7 +1847,9 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
        struct thandle                  *th     = NULL;
        struct lu_buf                   *pbuf   = NULL;
        struct lu_buf                   *ea_buf = &info->lti_big_buf;
+       struct lustre_handle             lh     = { 0 };
        int                              buflen = ea_buf->lb_len;
+       int                              idx    = 0;
        int                              rc     = 0;
        ENTRY;
 
@@ -1866,10 +1869,10 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
 
                ff->ff_parent.f_seq = cpu_to_le64(pfid->f_seq);
                ff->ff_parent.f_oid = cpu_to_le32(pfid->f_oid);
-               /* In fact, the ff_parent::f_ver is not the real parent FID::f_ver,
-                * instead, it is the OST-object index in its parent MDT-object
-                * layout EA. */
-               ff->ff_parent.f_ver = cpu_to_le32(ea_off);
+               /* Currently, the filter_fid::ff_parent::f_ver is not the
+                * real parent MDT-object's FID::f_ver, instead it is the
+                * OST-object index in its parent MDT-object's layout EA. */
+               ff->ff_parent.f_stripe_idx = cpu_to_le32(ea_off);
                pbuf = lfsck_buf_get(env, ff, sizeof(struct filter_fid));
                cobj = lfsck_object_find_by_dev(env, ltd->ltd_tgt, cfid);
                if (IS_ERR(cobj))
@@ -1892,7 +1895,7 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
         *
         *  1. Use the MDT-object's FID as the name with prefix and postfix.
         *
-        *  1.1 prefix "C-":    More than one OST-objects cliam the same
+        *  1.1 prefix "C-":    More than one OST-objects claim the same
         *                      MDT-object and the same slot in the layout EA.
         *                      It may be created for dangling referenced MDT
         *                      object or may be not.
@@ -1902,7 +1905,7 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
         *  1.3 prefix "R-":    The orphan OST-object know its parent FID but
         *                      does not know the position in the namespace.
         *
-        *  2. If there is name conflict, increase FID::f_ver for new name. */
+        *  2. If there is name conflict, append more index for new name. */
        sprintf(name, "%s"DFID"%s", prefix, PFID(pfid), postfix);
        do {
                rc = dt_lookup(env, lfsck->li_lpf_obj, (struct dt_rec *)tfid,
@@ -1915,9 +1918,8 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
                              "by the "DFID". Try to increase the FID version "
                              "for the new file name.\n",
                              lfsck_lfsck2name(lfsck), name, PFID(tfid));
-                       *tfid = *pfid;
-                       tfid->f_ver++;
-                       sprintf(name, "%s"DFID"%s", prefix, PFID(tfid), postfix);
+                       sprintf(name, "%s"DFID"%s-%d", prefix, PFID(pfid),
+                               postfix, ++idx);
                }
        } while (rc == 0);
 
@@ -1940,9 +1942,20 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
                ea_buf->lb_len = rc;
        }
 
+       /* Hold update lock on the .lustre/lost+found/MDTxxxx/.
+        *
+        * XXX: Currently, we do not grab the PDO lock as normal create cases,
+        *      because creating MDT-object for orphan OST-object is rare, we
+        *      do not much care about the performance. It can be improved in
+        *      the future when needed. */
+       rc = lfsck_layout_lock(env, com, lfsck->li_lpf_obj, &lh,
+                              MDS_INODELOCK_UPDATE);
+       if (rc != 0)
+               GOTO(put, rc);
+
        th = dt_trans_create(env, next);
        if (IS_ERR(th))
-               GOTO(put, rc = PTR_ERR(th));
+               GOTO(unlock, rc = PTR_ERR(th));
 
        /* 1a. Update OST-object's parent information remotely.
         *
@@ -2005,6 +2018,10 @@ static int lfsck_layout_recreate_parent(const struct lu_env *env,
 
 stop:
        dt_trans_stop(env, next, th);
+
+unlock:
+       lfsck_layout_unlock(&lh);
+
 put:
        if (cobj != NULL && !IS_ERR(cobj))
                lu_object_put(env, &cobj->do_lu);
@@ -2120,9 +2137,18 @@ static int lfsck_layout_slave_conditional_destroy(const struct lu_env *env,
        if (rc != ELDLM_OK)
                GOTO(put, rc = -EIO);
 
+       dt_write_lock(env, obj, 0);
+       /* Get obj's attr within lock again. */
+       rc = dt_attr_get(env, obj, la, BYPASS_CAPA);
+       if (rc != 0)
+               GOTO(unlock, rc);
+
+       if (la->la_ctime != 0)
+               GOTO(unlock, rc = -ETXTBSY);
+
        th = dt_trans_create(env, dev);
        if (IS_ERR(th))
-               GOTO(unlock1, rc = PTR_ERR(th));
+               GOTO(unlock, rc = PTR_ERR(th));
 
        rc = dt_declare_ref_del(env, obj, th);
        if (rc != 0)
@@ -2136,18 +2162,9 @@ static int lfsck_layout_slave_conditional_destroy(const struct lu_env *env,
        if (rc != 0)
                GOTO(stop, rc);
 
-       dt_write_lock(env, obj, 0);
-       /* Get obj's attr within lock again. */
-       rc = dt_attr_get(env, obj, la, BYPASS_CAPA);
-       if (rc != 0)
-               GOTO(unlock2, rc);
-
-       if (la->la_ctime != 0)
-               GOTO(unlock2, rc = -ETXTBSY);
-
        rc = dt_ref_del(env, obj, th);
        if (rc != 0)
-               GOTO(unlock2, rc);
+               GOTO(stop, rc);
 
        rc = dt_destroy(env, obj, th);
        if (rc == 0)
@@ -2156,15 +2173,13 @@ static int lfsck_layout_slave_conditional_destroy(const struct lu_env *env,
                       "But the original missed OST-object is found now.\n",
                       PFID(fid));
 
-       GOTO(unlock2, rc);
-
-unlock2:
-       dt_write_unlock(env, obj);
+       GOTO(stop, rc);
 
 stop:
        dt_trans_stop(env, dev, th);
 
-unlock1:
+unlock:
+       dt_write_unlock(env, obj);
        ldlm_lock_decref(&lh, LCK_EX);
 
 put:
@@ -2199,11 +2214,11 @@ static int lfsck_layout_conflict_create(const struct lu_env *env,
        struct lfsck_thread_info *info          = lfsck_env_info(env);
        struct lu_fid            *cfid2         = &info->lti_fid2;
        struct ost_id            *oi            = &info->lti_oi;
+       char                     *postfix       = info->lti_tmpbuf;
        struct lov_mds_md_v1     *lmm           = ea_buf->lb_buf;
        struct dt_device         *dev           = com->lc_lfsck->li_bottom;
        struct thandle           *th            = NULL;
        struct lustre_handle      lh            = { 0 };
-       char                      postfix[64];
        __u32                     ost_idx2      = le32_to_cpu(slot->l_ost_idx);
        int                       rc            = 0;
        ENTRY;
@@ -2235,7 +2250,7 @@ static int lfsck_layout_conflict_create(const struct lu_env *env,
                ea_buf->lb_len = ori_len;
 
                fid_zero(&rec->lor_fid);
-               snprintf(postfix, 64, "-"DFID"-%x",
+               snprintf(postfix, LFSCK_TMPBUF_LEN, "-"DFID"-%x",
                         PFID(lu_object_fid(&parent->do_lu)), ea_off);
                rc = lfsck_layout_recreate_parent(env, com, ltd, rec, cfid,
                                                  "C-", postfix, ea_off);
@@ -2306,10 +2321,11 @@ static int lfsck_layout_recreate_lovea(const struct lu_env *env,
        struct lustre_handle      lh            = { 0 };
        __u32                     magic;
        int                       fl            = 0;
-       int                       rc;
+       int                       rc            = 0;
        int                       rc1;
        int                       i;
        __u16                     count;
+       bool                      locked        = false;
        ENTRY;
 
        CDEBUG(D_LFSCK, "Re-create the crashed layout EA: parent "
@@ -2322,6 +2338,26 @@ static int lfsck_layout_recreate_lovea(const struct lu_env *env,
                RETURN(rc);
 
 again:
+       if (locked) {
+               dt_write_unlock(env, parent);
+               locked = false;
+       }
+
+       if (handle != NULL) {
+               dt_trans_stop(env, dt, handle);
+               handle = NULL;
+       }
+
+       if (rc < 0)
+               GOTO(unlock_layout, rc);
+
+       if (buf->lb_len < rc) {
+               lu_buf_realloc(buf, rc);
+               buflen = buf->lb_len;
+               if (buf->lb_buf == NULL)
+                       GOTO(unlock_layout, rc = -ENOMEM);
+       }
+
        if (!(bk->lb_param & LPF_DRYRUN)) {
                handle = dt_trans_create(env, dt);
                if (IS_ERR(handle))
@@ -2338,45 +2374,23 @@ again:
        }
 
        dt_write_lock(env, parent, 0);
+       locked = true;
        rc = dt_xattr_get(env, parent, buf, XATTR_NAME_LOV, BYPASS_CAPA);
        if (rc == -ERANGE) {
                rc = dt_xattr_get(env, parent, &LU_BUF_NULL, XATTR_NAME_LOV,
                                  BYPASS_CAPA);
                LASSERT(rc != 0);
-
-               dt_write_unlock(env, parent);
-               if (handle != NULL) {
-                       dt_trans_stop(env, dt, handle);
-                       handle = NULL;
-               }
-
-               if (rc < 0)
-                       GOTO(unlock_layout, rc);
-
-               lu_buf_realloc(buf, rc);
-               buflen = buf->lb_len;
-               if (buf->lb_buf == NULL)
-                       GOTO(unlock_layout, rc = -ENOMEM);
-
-               fl = LU_XATTR_REPLACE;
                goto again;
        } else if (rc == -ENODATA || rc == 0) {
+               rc = lov_mds_md_size(ea_off + 1, LOV_MAGIC_V1);
+               /* If the declared is not big enough, re-try. */
+               if (buf->lb_len < rc)
+                       goto again;
+
                fl = LU_XATTR_CREATE;
        } else if (rc < 0) {
                GOTO(unlock_parent, rc);
        } else if (unlikely(buf->lb_len == 0)) {
-               dt_write_unlock(env, parent);
-               if (handle != NULL) {
-                       dt_trans_stop(env, dt, handle);
-                       handle = NULL;
-               }
-
-               lu_buf_alloc(buf, rc);
-               buflen = buf->lb_len;
-               if (buf->lb_buf == NULL)
-                       GOTO(unlock_layout, rc = -ENOMEM);
-
-               fl = LU_XATTR_REPLACE;
                goto again;
        } else {
                fl = LU_XATTR_REPLACE;
@@ -2386,22 +2400,7 @@ again:
                if (bk->lb_param & LPF_DRYRUN)
                        GOTO(unlock_parent, rc = 1);
 
-               rc = lov_mds_md_size(ea_off + 1, LOV_MAGIC_V1);
-               /* If the declared is not big enough, re-try. */
-               if (buf->lb_len < rc) {
-                       dt_write_unlock(env, parent);
-                       if (handle != NULL) {
-                               dt_trans_stop(env, dt, handle);
-                               handle = NULL;
-                       }
-
-                       lu_buf_realloc(buf, rc);
-                       buflen = buf->lb_len;
-                       if (buf->lb_buf == NULL)
-                               GOTO(unlock_layout, rc = -ENOMEM);
-
-                       goto again;
-               }
+               LASSERT(buf->lb_len >= rc);
 
                buf->lb_len = rc;
                rc = lfsck_layout_extend_lovea(env, handle, parent, cfid, buf,
@@ -2437,22 +2436,10 @@ again:
                if (bk->lb_param & LPF_DRYRUN)
                        GOTO(unlock_parent, rc = 1);
 
-               rc = lov_mds_md_size(ea_off + 1, LOV_MAGIC_V1);
+               rc = lov_mds_md_size(ea_off + 1, magic);
                /* If the declared is not big enough, re-try. */
-               if (buf->lb_len < rc) {
-                       dt_write_unlock(env, parent);
-                       if (handle != NULL) {
-                               dt_trans_stop(env, dt, handle);
-                               handle = NULL;
-                       }
-
-                       lu_buf_realloc(buf, rc);
-                       buflen = buf->lb_len;
-                       if (buf->lb_buf == NULL)
-                               GOTO(unlock_layout, rc = -ENOMEM);
-
+               if (buf->lb_len < rc)
                        goto again;
-               }
 
                buf->lb_len = rc;
                rc = lfsck_layout_extend_lovea(env, handle, parent, cfid, buf,
@@ -2527,7 +2514,8 @@ again:
        RETURN(rc);
 
 unlock_parent:
-       dt_write_unlock(env, parent);
+       if (locked)
+               dt_write_unlock(env, parent);
 
 stop:
        if (handle != NULL)
@@ -2549,7 +2537,7 @@ static int lfsck_layout_scan_orphan_one(const struct lu_env *env,
        struct lfsck_layout     *lo     = com->lc_file_ram;
        struct lu_fid           *pfid   = &rec->lor_fid;
        struct dt_object        *parent = NULL;
-       __u32                    ea_off = pfid->f_ver;
+       __u32                    ea_off = pfid->f_stripe_idx;
        int                      rc     = 0;
        ENTRY;
 
@@ -2747,7 +2735,10 @@ static int lfsck_layout_recreate_ostobj(const struct lu_env *env,
        hint->dah_mode = 0;
        pfid->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
        pfid->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
-       pfid->ff_parent.f_ver = cpu_to_le32(llr->llr_lov_idx);
+       /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
+        * MDT-object's FID::f_ver, instead it is the OST-object index in its
+        * parent MDT-object's layout EA. */
+       pfid->ff_parent.f_stripe_idx = cpu_to_le32(llr->llr_lov_idx);
        buf = lfsck_buf_get(env, pfid, sizeof(struct filter_fid));
 
        rc = dt_declare_create(env, child, la, hint, NULL, handle);
@@ -2825,9 +2816,10 @@ static int lfsck_layout_repair_unmatched_pair(const struct lu_env *env,
 
        pfid->ff_parent.f_seq = cpu_to_le64(tfid->f_seq);
        pfid->ff_parent.f_oid = cpu_to_le32(tfid->f_oid);
-       /* The ff_parent->f_ver is not the real parent fid->f_ver. Instead,
-        * it is the OST-object index in the parent MDT-object layout. */
-       pfid->ff_parent.f_ver = cpu_to_le32(llr->llr_lov_idx);
+       /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
+        * MDT-object's FID::f_ver, instead it is the OST-object index in its
+        * parent MDT-object's layout EA. */
+       pfid->ff_parent.f_stripe_idx = cpu_to_le32(llr->llr_lov_idx);
        buf = lfsck_buf_get(env, pfid, sizeof(struct filter_fid));
 
        rc = dt_declare_xattr_set(env, child, buf, XATTR_NAME_FID, 0, handle);
@@ -3239,10 +3231,10 @@ static int lfsck_layout_assistant_handle_one(const struct lu_env *env,
                fid_zero(pfid);
        } else {
                fid_le_to_cpu(pfid, &pea->ff_parent);
-               /* OST-object does not save parent FID::f_ver, instead,
-                * the OST-object index in the parent MDT-object layout
-                * EA reuses the pfid->f_ver. */
-               idx = pfid->f_ver;
+               /* Currently, the filter_fid::ff_parent::f_ver is not the
+                * real parent MDT-object's FID::f_ver, instead it is the
+                * OST-object index in its parent MDT-object's layout EA. */
+               idx = pfid->f_stripe_idx;
                pfid->f_ver = 0;
        }
 
@@ -3391,7 +3383,7 @@ static int lfsck_layout_assistant(void *args)
                         * handled to avoid too frequent thread schedule. */
                        if (llmd->llmd_prefetched == 0 ||
                            (bk->lb_async_windows != 0 &&
-                            (bk->lb_async_windows >> 1) ==
+                            bk->lb_async_windows / 2 ==
                             llmd->llmd_prefetched))
                                wakeup = true;
                        spin_unlock(&llmd->llmd_lock);
@@ -3833,6 +3825,209 @@ lfsck_layout_slave_notify_master(const struct lu_env *env,
        RETURN_EXIT;
 }
 
+/*
+ * \ret -ENODATA: unrecognized stripe
+ * \ret = 0     : recognized stripe
+ * \ret < 0     : other failures
+ */
+static int lfsck_layout_master_check_pairs(const struct lu_env *env,
+                                          struct lfsck_component *com,
+                                          struct lu_fid *cfid,
+                                          struct lu_fid *pfid)
+{
+       struct lfsck_thread_info        *info   = lfsck_env_info(env);
+       struct lu_buf                   *buf    = &info->lti_big_buf;
+       struct ost_id                   *oi     = &info->lti_oi;
+       struct dt_object                *obj;
+       struct lov_mds_md_v1            *lmm;
+       struct lov_ost_data_v1          *objs;
+       __u32                            idx    = pfid->f_stripe_idx;
+       __u32                            magic;
+       int                              rc     = 0;
+       int                              i;
+       __u16                            count;
+       ENTRY;
+
+       pfid->f_ver = 0;
+       obj = lfsck_object_find_by_dev(env, com->lc_lfsck->li_bottom, pfid);
+       if (IS_ERR(obj))
+               RETURN(PTR_ERR(obj));
+
+       dt_read_lock(env, obj, 0);
+       if (unlikely(!dt_object_exists(obj)))
+               GOTO(unlock, rc = -ENOENT);
+
+       rc = lfsck_layout_get_lovea(env, obj, buf, NULL);
+       if (rc < 0)
+               GOTO(unlock, rc);
+
+       if (rc == 0)
+               GOTO(unlock, rc = -ENODATA);
+
+       lmm = buf->lb_buf;
+       rc = lfsck_layout_verify_header(lmm);
+       if (rc != 0)
+               GOTO(unlock, rc);
+
+       /* Currently, we only support LOV_MAGIC_V1/LOV_MAGIC_V3 which has
+        * been verified in lfsck_layout_verify_header() already. If some
+        * new magic introduced in the future, then layout LFSCK needs to
+        * be updated also. */
+       magic = le32_to_cpu(lmm->lmm_magic);
+       if (magic == LOV_MAGIC_V1) {
+               objs = &(lmm->lmm_objects[0]);
+       } else {
+               LASSERT(magic == LOV_MAGIC_V3);
+               objs = &((struct lov_mds_md_v3 *)lmm)->lmm_objects[0];
+       }
+
+       fid_to_ostid(cfid, oi);
+       count = le16_to_cpu(lmm->lmm_stripe_count);
+       for (i = 0; i < count; i++, objs++) {
+               struct ost_id oi2;
+
+               ostid_le_to_cpu(&objs->l_ost_oi, &oi2);
+               if (memcmp(oi, &oi2, sizeof(*oi)) == 0)
+                       GOTO(unlock, rc = (i != idx ? -ENODATA : 0));
+       }
+
+       GOTO(unlock, rc = -ENODATA);
+
+unlock:
+       dt_read_unlock(env, obj);
+       lu_object_put(env, &obj->do_lu);
+
+       return rc;
+}
+
+/*
+ * The LFSCK-on-OST will ask the LFSCK-on-MDT to check whether the given
+ * MDT-object/OST-object pairs match or not to aviod transfer MDT-object
+ * layout EA from MDT to OST. On one hand, the OST no need to understand
+ * the layout EA structure; on the other hand, it may cause trouble when
+ * transfer large layout EA from MDT to OST via normal OUT RPC.
+ *
+ * \ret > 0: unrecognized stripe
+ * \ret = 0: recognized stripe
+ * \ret < 0: other failures
+ */
+static int lfsck_layout_slave_check_pairs(const struct lu_env *env,
+                                         struct lfsck_component *com,
+                                         struct lu_fid *cfid,
+                                         struct lu_fid *pfid)
+{
+       struct lfsck_instance    *lfsck  = com->lc_lfsck;
+       struct obd_device        *obd    = lfsck->li_obd;
+       struct seq_server_site   *ss     =
+                       lu_site2seq(lfsck->li_bottom->dd_lu_dev.ld_site);
+       struct obd_export        *exp    = NULL;
+       struct ptlrpc_request    *req    = NULL;
+       struct lfsck_request     *lr;
+       struct lu_seq_range       range  = { 0 };
+       int                       rc     = 0;
+       ENTRY;
+
+       if (unlikely(fid_is_idif(pfid)))
+               RETURN(1);
+
+       fld_range_set_any(&range);
+       rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(pfid), &range);
+       if (rc != 0)
+               RETURN(rc == -ENOENT ? 1 : rc);
+
+       if (unlikely(!fld_range_is_mdt(&range)))
+               RETURN(1);
+
+       exp = lustre_find_lwp_by_index(obd->obd_name, range.lsr_index);
+       if (unlikely(exp == NULL))
+               RETURN(1);
+
+       if (!(exp_connect_flags(exp) & OBD_CONNECT_LFSCK))
+               GOTO(out, rc = -EOPNOTSUPP);
+
+       req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LFSCK_NOTIFY);
+       if (req == NULL)
+               GOTO(out, rc = -ENOMEM);
+
+       rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, LFSCK_NOTIFY);
+       if (rc != 0) {
+               ptlrpc_request_free(req);
+
+               GOTO(out, rc);
+       }
+
+       lr = req_capsule_client_get(&req->rq_pill, &RMF_LFSCK_REQUEST);
+       memset(lr, 0, sizeof(*lr));
+       lr->lr_event = LE_PAIRS_VERIFY;
+       lr->lr_active = LT_LAYOUT;
+       lr->lr_fid = *cfid; /* OST-object itself FID. */
+       lr->lr_fid2 = *pfid; /* The claimed parent FID. */
+
+       ptlrpc_request_set_replen(req);
+       rc = ptlrpc_queue_wait(req);
+       ptlrpc_req_finished(req);
+
+       if (rc == -ENOENT || rc == -ENODATA)
+               rc = 1;
+
+       GOTO(out, rc);
+
+out:
+       if (exp != NULL)
+               class_export_put(exp);
+
+       return rc;
+}
+
+static int lfsck_layout_slave_repair_pfid(const struct lu_env *env,
+                                         struct lfsck_component *com,
+                                         struct lfsck_request *lr)
+{
+       struct lfsck_thread_info        *info   = lfsck_env_info(env);
+       struct filter_fid               *ff     = &info->lti_new_pfid;
+       struct lu_buf                   *buf;
+       struct dt_device                *dev    = com->lc_lfsck->li_bottom;
+       struct dt_object                *obj;
+       struct thandle                  *th     = NULL;
+       int                              rc     = 0;
+       ENTRY;
+
+       obj = lfsck_object_find_by_dev(env, dev, &lr->lr_fid);
+       if (IS_ERR(obj))
+               RETURN(PTR_ERR(obj));
+
+       fid_cpu_to_le(&ff->ff_parent, &lr->lr_fid2);
+       buf = lfsck_buf_get(env, ff, sizeof(*ff));
+       dt_write_lock(env, obj, 0);
+       if (unlikely(!dt_object_exists(obj)))
+               GOTO(unlock, rc = 0);
+
+       th = dt_trans_create(env, dev);
+       if (IS_ERR(th))
+               GOTO(unlock, rc = PTR_ERR(th));
+
+       rc = dt_declare_xattr_set(env, obj, buf, XATTR_NAME_FID, 0, th);
+       if (rc != 0)
+               GOTO(stop, rc);
+
+       rc = dt_trans_start_local(env, dev, th);
+       if (rc != 0)
+               GOTO(stop, rc);
+
+       rc = dt_xattr_set(env, obj, buf, XATTR_NAME_FID, 0, th, BYPASS_CAPA);
+
+       GOTO(stop, rc);
+
+stop:
+       dt_trans_stop(env, dev, th);
+
+unlock:
+       dt_write_unlock(env, obj);
+       lu_object_put(env, &obj->do_lu);
+
+       return rc;
+}
+
 /* layout APIs */
 
 static int lfsck_layout_reset(const struct lu_env *env,
@@ -5019,6 +5214,15 @@ static int lfsck_layout_master_in_notify(const struct lu_env *env,
        bool                             fail  = false;
        ENTRY;
 
+       if (lr->lr_event == LE_PAIRS_VERIFY) {
+               int rc;
+
+               rc = lfsck_layout_master_check_pairs(env, com, &lr->lr_fid,
+                                                    &lr->lr_fid2);
+
+               RETURN(rc);
+       }
+
        if (lr->lr_event != LE_PHASE1_DONE &&
            lr->lr_event != LE_PHASE2_DONE &&
            lr->lr_event != LE_PEER_EXIT)
@@ -5107,24 +5311,55 @@ static int lfsck_layout_slave_in_notify(const struct lu_env *env,
        struct lfsck_instance            *lfsck = com->lc_lfsck;
        struct lfsck_layout_slave_data   *llsd  = com->lc_data;
        struct lfsck_layout_slave_target *llst;
+       int                               rc;
        ENTRY;
 
-       if (lr->lr_event == LE_FID_ACCESSED) {
+       switch (lr->lr_event) {
+       case LE_FID_ACCESSED:
                lfsck_rbtree_update_bitmap(env, com, &lr->lr_fid, true);
-
                RETURN(0);
-       }
+       case LE_CONDITIONAL_DESTROY:
+               rc = lfsck_layout_slave_conditional_destroy(env, com, lr);
+               RETURN(rc);
+       case LE_PAIRS_VERIFY: {
+               lr->lr_status = LPVS_INIT;
+               /* Firstly, if the MDT-object which is claimed via OST-object
+                * local stored PFID xattr recognizes the OST-object, then it
+                * must be that the client given PFID is wrong. */
+               rc = lfsck_layout_slave_check_pairs(env, com, &lr->lr_fid,
+                                                   &lr->lr_fid3);
+               if (rc <= 0)
+                       RETURN(0);
 
-       if (lr->lr_event == LE_CONDITIONAL_DESTROY) {
-               int rc;
+               lr->lr_status = LPVS_INCONSISTENT;
+               /* The OST-object local stored PFID xattr is stale. We need to
+                * check whether the MDT-object that is claimed via the client
+                * given PFID information recognizes the OST-object or not. If
+                * matches, then need to update the OST-object's PFID xattr. */
+               rc = lfsck_layout_slave_check_pairs(env, com, &lr->lr_fid,
+                                                   &lr->lr_fid2);
+               /* For rc < 0 case:
+                * We are not sure whether the client given PFID information
+                * is correct or not, do nothing to avoid improper fixing.
+                *
+                * For rc > 0 case:
+                * The client given PFID information is also invalid, we can
+                * NOT fix the OST-object inconsistency.
+                */
+               if (rc != 0)
+                       RETURN(rc);
 
-               rc = lfsck_layout_slave_conditional_destroy(env, com, lr);
+               lr->lr_status = LPVS_INCONSISTENT_TOFIX;
+               rc = lfsck_layout_slave_repair_pfid(env, com, lr);
 
                RETURN(rc);
        }
-
-       if (lr->lr_event != LE_PHASE2_DONE && lr->lr_event != LE_PEER_EXIT)
+       case LE_PHASE2_DONE:
+       case LE_PEER_EXIT:
+               break;
+       default:
                RETURN(-EINVAL);
+       }
 
        llst = lfsck_layout_llst_find_and_del(llsd, lr->lr_index, true);
        if (llst == NULL)
@@ -5820,10 +6055,10 @@ again1:
                GOTO(out, rc = -EINVAL);
 
        fid_le_to_cpu(&rec->lor_fid, &pfid->ff_parent);
-       /* In fact, the ff_parent::f_ver is not the real parent FID::f_ver,
-        * instead, it is the OST-object index in its parent MDT-object
-        * layout EA. */
-       save = rec->lor_fid.f_ver;
+       /* Currently, the filter_fid::ff_parent::f_ver is not the real parent
+        * MDT-object's FID::f_ver, instead it is the OST-object index in its
+        * parent MDT-object's layout EA. */
+       save = rec->lor_fid.f_stripe_idx;
        rec->lor_fid.f_ver = 0;
        rc = lfsck_fid_match_idx(env, lfsck, &rec->lor_fid, idx);
        /* If the orphan OST-object does not claim the MDT, then next.
@@ -5837,7 +6072,7 @@ again1:
                goto again1;
        }
 
-       rec->lor_fid.f_ver = save;
+       rec->lor_fid.f_stripe_idx = save;
        rec->lor_uid = la->la_uid;
        rec->lor_gid = la->la_gid;