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b=22108 correct number of objects in slow precreating path
[fs/lustre-release.git] / lustre / obdfilter / filter.c
index 8043556..a731840 100644 (file)
@@ -26,7 +26,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  */
 /*
@@ -120,9 +120,9 @@ int filter_version_get_check(struct obd_export *exp,
 int filter_finish_transno(struct obd_export *exp, struct inode *inode,
                           struct obd_trans_info *oti, int rc, int force_sync)
 {
-        struct filter_obd *filter = &exp->exp_obd->u.filter;
-        struct filter_export_data *fed = &exp->exp_filter_data;
-        struct lr_server_data *fsd = class_server_data(exp->exp_obd);
+        struct obd_device_target *obt = &exp->exp_obd->u.obt;
+        struct tg_export_data *ted = &exp->exp_target_data;
+        struct lr_server_data *lsd = class_server_data(exp->exp_obd);
         struct lsd_client_data *lcd;
         __u64 last_rcvd;
         loff_t off;
@@ -135,12 +135,12 @@ int filter_finish_transno(struct obd_export *exp, struct inode *inode,
         if (!exp->exp_obd->obd_replayable || oti == NULL)
                 RETURN(rc);
 
-        cfs_mutex_down(&fed->fed_lcd_lock);
-        lcd = fed->fed_lcd;
+        cfs_mutex_down(&ted->ted_lcd_lock);
+        lcd = ted->ted_lcd;
         /* if the export has already been disconnected, we have no last_rcvd slot,
          * update server data with latest transno then */
         if (lcd == NULL) {
-                cfs_mutex_up(&fed->fed_lcd_lock);
+                cfs_mutex_up(&ted->ted_lcd_lock);
                 CWARN("commit transaction for disconnected client %s: rc %d\n",
                       exp->exp_client_uuid.uuid, rc);
                 err = filter_update_server_data(exp->exp_obd);
@@ -148,14 +148,14 @@ int filter_finish_transno(struct obd_export *exp, struct inode *inode,
         }
 
         /* we don't allocate new transnos for replayed requests */
-        cfs_spin_lock(&filter->fo_translock);
+        cfs_spin_lock(&obt->obt_lut->lut_translock);
         if (oti->oti_transno == 0) {
-                last_rcvd = le64_to_cpu(fsd->lsd_last_transno) + 1;
-                fsd->lsd_last_transno = cpu_to_le64(last_rcvd);
+                last_rcvd = le64_to_cpu(lsd->lsd_last_transno) + 1;
+                lsd->lsd_last_transno = cpu_to_le64(last_rcvd);
         } else {
                 last_rcvd = oti->oti_transno;
-                if (last_rcvd > le64_to_cpu(fsd->lsd_last_transno))
-                        fsd->lsd_last_transno = cpu_to_le64(last_rcvd);
+                if (last_rcvd > le64_to_cpu(lsd->lsd_last_transno))
+                        lsd->lsd_last_transno = cpu_to_le64(last_rcvd);
         }
         oti->oti_transno = last_rcvd;
 
@@ -163,15 +163,15 @@ int filter_finish_transno(struct obd_export *exp, struct inode *inode,
         lcd->lcd_last_transno = cpu_to_le64(last_rcvd);
         lcd->lcd_pre_versions[0] = cpu_to_le64(oti->oti_pre_version);
         lcd->lcd_last_xid = cpu_to_le64(oti->oti_xid);
-        cfs_spin_unlock(&filter->fo_translock);
+        cfs_spin_unlock(&obt->obt_lut->lut_translock);
 
         if (inode)
                 fsfilt_set_version(exp->exp_obd, inode, last_rcvd);
 
-        off = fed->fed_lr_off;
+        off = ted->ted_lr_off;
         if (off <= 0) {
                 CERROR("%s: client idx %d is %lld\n", exp->exp_obd->obd_name,
-                       fed->fed_lr_idx, fed->fed_lr_off);
+                       ted->ted_lr_idx, ted->ted_lr_off);
                 err = -EINVAL;
         } else {
                 class_export_cb_get(exp); /* released when the cb is called */
@@ -182,7 +182,7 @@ int filter_finish_transno(struct obd_export *exp, struct inode *inode,
                                                            filter_commit_cb,
                                                            exp);
 
-                err = fsfilt_write_record(exp->exp_obd, filter->fo_rcvd_filp,
+                err = fsfilt_write_record(exp->exp_obd, obt->obt_rcvd_filp,
                                           lcd, sizeof(*lcd), &off,
                                           force_sync | exp->exp_need_sync);
                 if (force_sync)
@@ -195,8 +195,8 @@ int filter_finish_transno(struct obd_export *exp, struct inode *inode,
         }
 
         CDEBUG(log_pri, "wrote trans "LPU64" for client %s at #%d: err = %d\n",
-               last_rcvd, lcd->lcd_uuid, fed->fed_lr_idx, err);
-        cfs_mutex_up(&fed->fed_lcd_lock);
+               last_rcvd, lcd->lcd_uuid, ted->ted_lr_idx, err);
+        cfs_mutex_up(&ted->ted_lcd_lock);
         RETURN(rc);
 }
 
@@ -241,6 +241,7 @@ static int lprocfs_init_rw_stats(struct obd_device *obd,
    plus the procfs overhead :( */
 static int filter_export_stats_init(struct obd_device *obd,
                                     struct obd_export *exp,
+                                    int reconnect,
                                     void *client_nid)
 {
         int rc, newnid = 0;
@@ -250,7 +251,7 @@ static int filter_export_stats_init(struct obd_device *obd,
                 /* Self-export gets no proc entry */
                 RETURN(0);
 
-        rc = lprocfs_exp_setup(exp, client_nid, &newnid);
+        rc = lprocfs_exp_setup(exp, client_nid, reconnect, &newnid);
         if (rc) {
                 /* Mask error for already created
                  * /proc entries */
@@ -282,16 +283,7 @@ static int filter_export_stats_init(struct obd_device *obd,
                                             tmp->nid_stats);
                 if (rc)
                         GOTO(clean, rc);
-                /* Always add in ldlm_stats */
-                tmp->nid_ldlm_stats = 
-                        lprocfs_alloc_stats(LDLM_LAST_OPC - LDLM_FIRST_OPC,
-                                            LPROCFS_STATS_FLAG_NOPERCPU);
-                if (tmp->nid_ldlm_stats == NULL)
-                        GOTO(clean, rc = -ENOMEM);
-
-                lprocfs_init_ldlm_stats(tmp->nid_ldlm_stats);
-                rc = lprocfs_register_stats(tmp->nid_proc, "ldlm_stats",
-                                            tmp->nid_ldlm_stats);
+                rc = lprocfs_nid_ldlm_stats_init(tmp);
                 if (rc)
                         GOTO(clean, rc);
         }
@@ -309,10 +301,10 @@ static int filter_export_stats_init(struct obd_device *obd,
 static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
                              int cl_idx)
 {
-        struct filter_obd *filter = &obd->u.filter;
-        struct filter_export_data *fed = &exp->exp_filter_data;
-        struct lr_server_data *fsd = class_server_data(obd);
-        unsigned long *bitmap = filter->fo_last_rcvd_slots;
+        struct obd_device_target *obt = &obd->u.obt;
+        struct tg_export_data *ted = &exp->exp_target_data;
+        struct lr_server_data *lsd = class_server_data(obd);
+        unsigned long *bitmap = obt->obt_lut->lut_client_bitmap;
         int new_client = (cl_idx == -1);
 
         ENTRY;
@@ -321,7 +313,7 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
         LASSERTF(cl_idx > -2, "%d\n", cl_idx);
 
         /* Self-export */
-        if (strcmp(fed->fed_lcd->lcd_uuid, obd->obd_uuid.uuid) == 0)
+        if (strcmp(ted->ted_lcd->lcd_uuid, obd->obd_uuid.uuid) == 0)
                 RETURN(0);
 
         /* the bitmap operations can handle cl_idx > sizeof(long) * 8, so
@@ -348,34 +340,37 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
                 }
         }
 
-        fed->fed_lr_idx = cl_idx;
-        fed->fed_lr_off = le32_to_cpu(fsd->lsd_client_start) +
-                          cl_idx * le16_to_cpu(fsd->lsd_client_size);
-        cfs_init_mutex(&fed->fed_lcd_lock);
-        LASSERTF(fed->fed_lr_off > 0, "fed_lr_off = %llu\n", fed->fed_lr_off);
+        ted->ted_lr_idx = cl_idx;
+        ted->ted_lr_off = le32_to_cpu(lsd->lsd_client_start) +
+                          cl_idx * le16_to_cpu(lsd->lsd_client_size);
+        cfs_init_mutex(&ted->ted_lcd_lock);
+        LASSERTF(ted->ted_lr_off > 0, "ted_lr_off = %llu\n", ted->ted_lr_off);
 
         CDEBUG(D_INFO, "client at index %d (%llu) with UUID '%s' added\n",
-               fed->fed_lr_idx, fed->fed_lr_off, fed->fed_lcd->lcd_uuid);
+               ted->ted_lr_idx, ted->ted_lr_off, ted->ted_lcd->lcd_uuid);
 
         if (new_client) {
                 struct lvfs_run_ctxt saved;
-                loff_t off = fed->fed_lr_off;
+                loff_t off = ted->ted_lr_off;
                 int rc;
                 void *handle;
 
                 CDEBUG(D_INFO, "writing client lcd at idx %u (%llu) (len %u)\n",
-                       fed->fed_lr_idx,off,(unsigned int)sizeof(*fed->fed_lcd));
+                       ted->ted_lr_idx,off,(unsigned int)sizeof(*ted->ted_lcd));
+
+                if (OBD_FAIL_CHECK(OBD_FAIL_TGT_CLIENT_ADD))
+                        RETURN(-ENOSPC);
 
                 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
                 /* Transaction needed to fix bug 1403 */
                 handle = fsfilt_start(obd,
-                                      filter->fo_rcvd_filp->f_dentry->d_inode,
+                                      obt->obt_rcvd_filp->f_dentry->d_inode,
                                       FSFILT_OP_SETATTR, NULL);
                 if (IS_ERR(handle)) {
                         rc = PTR_ERR(handle);
                         CERROR("unable to start transaction: rc %d\n", rc);
                 } else {
-                        fed->fed_lcd->lcd_last_epoch = fsd->lsd_start_epoch;
+                        ted->ted_lcd->lcd_last_epoch = lsd->lsd_start_epoch;
                         exp->exp_last_request_time = cfs_time_current_sec();
                         rc = fsfilt_add_journal_cb(obd, 0, handle,
                                                    target_client_add_cb,
@@ -385,19 +380,19 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
                                 exp->exp_need_sync = 1;
                                 cfs_spin_unlock(&exp->exp_lock);
                         }
-                        rc = fsfilt_write_record(obd, filter->fo_rcvd_filp,
-                                                 fed->fed_lcd,
-                                                 sizeof(*fed->fed_lcd),
+                        rc = fsfilt_write_record(obd, obt->obt_rcvd_filp,
+                                                 ted->ted_lcd,
+                                                 sizeof(*ted->ted_lcd),
                                                  &off, rc /* sync if no cb */);
                         fsfilt_commit(obd,
-                                      filter->fo_rcvd_filp->f_dentry->d_inode,
+                                      obt->obt_rcvd_filp->f_dentry->d_inode,
                                       handle, 0);
                 }
                 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
                 if (rc) {
                         CERROR("error writing %s client idx %u: rc %d\n",
-                               LAST_RCVD, fed->fed_lr_idx, rc);
+                               LAST_RCVD, ted->ted_lr_idx, rc);
                         RETURN(rc);
                 }
         }
@@ -406,62 +401,60 @@ static int filter_client_add(struct obd_device *obd, struct obd_export *exp,
 
 static int filter_client_del(struct obd_export *exp)
 {
-        struct filter_export_data *fed = &exp->exp_filter_data;
-        struct filter_obd *filter = &exp->exp_obd->u.filter;
-        struct obd_device *obd = exp->exp_obd;
+        struct tg_export_data *ted = &exp->exp_target_data;
+        struct obd_device_target *obt = &exp->exp_obd->u.obt;
         struct lvfs_run_ctxt saved;
-        struct lsd_client_data *lcd = fed->fed_lcd;
         int rc;
         loff_t off;
         ENTRY;
 
-        if (lcd == NULL)
+        if (ted->ted_lcd == NULL)
                 RETURN(0);
 
         /* XXX if lcd_uuid were a real obd_uuid, I could use obd_uuid_equals */
-        if (strcmp(lcd->lcd_uuid, obd->obd_uuid.uuid ) == 0)
+        if (strcmp(ted->ted_lcd->lcd_uuid, exp->exp_obd->obd_uuid.uuid ) == 0)
                 GOTO(free, 0);
 
-        LASSERT(filter->fo_last_rcvd_slots != NULL);
+        LASSERT(obt->obt_lut->lut_client_bitmap != NULL);
 
-        off = fed->fed_lr_off;
+        off = ted->ted_lr_off;
 
         CDEBUG(D_INFO, "freeing client at idx %u, offset %lld with UUID '%s'\n",
-               fed->fed_lr_idx, fed->fed_lr_off, lcd->lcd_uuid);
+               ted->ted_lr_idx, ted->ted_lr_off, ted->ted_lcd->lcd_uuid);
 
-        /* Don't clear fed_lr_idx here as it is likely also unset.  At worst
+        /* Don't clear ted_lr_idx here as it is likely also unset.  At worst
          * we leak a client slot that will be cleaned on the next recovery. */
         if (off <= 0) {
                 CERROR("%s: client idx %d has med_off %lld\n",
-                       obd->obd_name, fed->fed_lr_idx, off);
+                       exp->exp_obd->obd_name, ted->ted_lr_idx, off);
                 GOTO(free, rc = -EINVAL);
         }
 
         /* Clear the bit _after_ zeroing out the client so we don't
            race with filter_client_add and zero out new clients.*/
-        if (!cfs_test_bit(fed->fed_lr_idx, filter->fo_last_rcvd_slots)) {
+        if (!cfs_test_bit(ted->ted_lr_idx, obt->obt_lut->lut_client_bitmap)) {
                 CERROR("FILTER client %u: bit already clear in bitmap!!\n",
-                       fed->fed_lr_idx);
+                       ted->ted_lr_idx);
                 LBUG();
         }
 
-        push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+        push_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
         /* Make sure the server's last_transno is up to date.
          * This should be done before zeroing client slot so last_transno will
          * be in server data or in client data in case of failure */
-        filter_update_server_data(obd);
-
-        cfs_mutex_down(&fed->fed_lcd_lock);
-        memset(fed->fed_lcd->lcd_uuid, 0, sizeof fed->fed_lcd->lcd_uuid);
-        rc = fsfilt_write_record(obd, filter->fo_rcvd_filp,
-                                 fed->fed_lcd,
-                                 sizeof(*fed->fed_lcd), &off, 0);
-        cfs_mutex_up(&fed->fed_lcd_lock);
-        pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
+        filter_update_server_data(exp->exp_obd);
+
+        cfs_mutex_down(&ted->ted_lcd_lock);
+        memset(ted->ted_lcd->lcd_uuid, 0, sizeof ted->ted_lcd->lcd_uuid);
+        rc = fsfilt_write_record(exp->exp_obd, obt->obt_rcvd_filp,
+                                 ted->ted_lcd,
+                                 sizeof(*ted->ted_lcd), &off, 0);
+        cfs_mutex_up(&ted->ted_lcd_lock);
+        pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
 
         CDEBUG(rc == 0 ? D_INFO : D_ERROR,
                "zero out client %s at idx %u/%llu in %s, rc %d\n",
-               lcd->lcd_uuid, fed->fed_lr_idx, fed->fed_lr_off,
+               ted->ted_lcd->lcd_uuid, ted->ted_lr_idx, ted->ted_lr_off,
                LAST_RCVD, rc);
         EXIT;
 free:
@@ -529,7 +522,7 @@ void filter_fmd_expire(struct obd_export *exp)
  * caller must hold fed_lock and take fmd reference itself */
 static struct filter_mod_data *filter_fmd_find_nolock(struct filter_obd *filter,
                                                 struct filter_export_data *fed,
-                                                obd_id objid, obd_gr group)
+                                                obd_id objid, obd_seq group)
 {
         struct filter_mod_data *found = NULL, *fmd;
 
@@ -552,7 +545,7 @@ static struct filter_mod_data *filter_fmd_find_nolock(struct filter_obd *filter,
 
 /* Find fmd based on objid and group, or return NULL if not found. */
 struct filter_mod_data *filter_fmd_find(struct obd_export *exp,
-                                        obd_id objid, obd_gr group)
+                                        obd_id objid, obd_seq group)
 {
         struct filter_mod_data *fmd;
 
@@ -572,7 +565,7 @@ struct filter_mod_data *filter_fmd_find(struct obd_export *exp,
  * Currently this is not fatal because any fmd state is transient and
  * may also be freed when it gets sufficiently old. */
 struct filter_mod_data *filter_fmd_get(struct obd_export *exp,
-                                       obd_id objid, obd_gr group)
+                                       obd_id objid, obd_seq group)
 {
         struct filter_export_data *fed = &exp->exp_filter_data;
         struct filter_mod_data *found = NULL, *fmd_new = NULL;
@@ -610,7 +603,7 @@ struct filter_mod_data *filter_fmd_get(struct obd_export *exp,
  * This isn't so critical because it would in fact only affect the one client
  * that is doing the unlink and at worst we have an stale entry referencing
  * an object that should never be used again. */
-static void filter_fmd_drop(struct obd_export *exp, obd_id objid, obd_gr group)
+static void filter_fmd_drop(struct obd_export *exp, obd_id objid, obd_seq group)
 {
         struct filter_mod_data *found = NULL;
 
@@ -642,20 +635,24 @@ static void filter_fmd_cleanup(struct obd_export *exp)
 
 static int filter_init_export(struct obd_export *exp)
 {
+        int rc;
         cfs_spin_lock_init(&exp->exp_filter_data.fed_lock);
         CFS_INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
 
         cfs_spin_lock(&exp->exp_lock);
         exp->exp_connecting = 1;
         cfs_spin_unlock(&exp->exp_lock);
+        rc = lut_client_alloc(exp);
+        if (rc == 0)
+                rc = ldlm_init_export(exp);
 
-        return ldlm_init_export(exp);
+        return rc;
 }
 
-static int filter_free_server_data(struct filter_obd *filter)
+static int filter_free_server_data(struct obd_device_target *obt)
 {
-        lut_fini(NULL, filter->fo_obt.obt_lut);
-        OBD_FREE_PTR(filter->fo_obt.obt_lut);
+        lut_fini(NULL, obt->obt_lut);
+        OBD_FREE_PTR(obt->obt_lut);
         return 0;
 }
 
@@ -663,25 +660,25 @@ static int filter_free_server_data(struct filter_obd *filter)
 int filter_update_server_data(struct obd_device *obd)
 {
         struct file *filp = obd->u.obt.obt_rcvd_filp;
-        struct lr_server_data *fsd = class_server_data(obd);
+        struct lr_server_data *lsd = class_server_data(obd);
         loff_t off = 0;
         int rc;
         ENTRY;
 
-        CDEBUG(D_INODE, "server uuid      : %s\n", fsd->lsd_uuid);
+        CDEBUG(D_INODE, "server uuid      : %s\n", lsd->lsd_uuid);
         CDEBUG(D_INODE, "server last_rcvd : "LPU64"\n",
-               le64_to_cpu(fsd->lsd_last_transno));
+               le64_to_cpu(lsd->lsd_last_transno));
         CDEBUG(D_INODE, "server last_mount: "LPU64"\n",
-               le64_to_cpu(fsd->lsd_mount_count));
+               le64_to_cpu(lsd->lsd_mount_count));
 
-        rc = fsfilt_write_record(obd, filp, fsd, sizeof(*fsd), &off, 0);
+        rc = fsfilt_write_record(obd, filp, lsd, sizeof(*lsd), &off, 0);
         if (rc)
                 CERROR("error writing lr_server_data: rc = %d\n", rc);
 
         RETURN(rc);
 }
 
-int filter_update_last_objid(struct obd_device *obd, obd_gr group,
+int filter_update_last_objid(struct obd_device *obd, obd_seq group,
                              int force_sync)
 {
         struct filter_obd *filter = &obd->u.filter;
@@ -691,19 +688,19 @@ int filter_update_last_objid(struct obd_device *obd, obd_gr group,
         ENTRY;
 
         if (filter->fo_last_objid_files[group] == NULL) {
-                CERROR("Object group "LPU64" not fully setup; not updating "
+                CERROR("Object seq "LPU64" not fully setup; not updating "
                        "last_objid\n", group);
                 RETURN(-EINVAL);
         }
 
-        CDEBUG(D_INODE, "%s: server last_objid for group "LPU64": "LPU64"\n",
-               obd->obd_name, group, filter->fo_last_objids[group]);
+        CDEBUG(D_INODE, "%s: server last_objid for "POSTID"\n",
+               obd->obd_name, filter->fo_last_objids[group], group);
 
         tmp = cpu_to_le64(filter->fo_last_objids[group]);
         rc = fsfilt_write_record(obd, filter->fo_last_objid_files[group],
                                  &tmp, sizeof(tmp), &off, force_sync);
         if (rc)
-                CERROR("error writing group "LPU64" last objid: rc = %d\n",
+                CERROR("error writing seq "LPU64" last objid: rc = %d\n",
                        group, rc);
         RETURN(rc);
 }
@@ -712,7 +709,7 @@ extern int ost_handle(struct ptlrpc_request *req);
 static int filter_init_server_data(struct obd_device *obd, struct file * filp)
 {
         struct filter_obd *filter = &obd->u.filter;
-        struct lr_server_data *fsd;
+        struct lr_server_data *lsd;
         struct lsd_client_data *lcd = NULL;
         struct inode *inode = filp->f_dentry->d_inode;
         unsigned long last_rcvd_size = i_size_read(inode);
@@ -725,7 +722,7 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
 
         /* ensure padding in the struct is the correct size */
         CLASSERT (offsetof(struct lr_server_data, lsd_padding) +
-                 sizeof(fsd->lsd_padding) == LR_SERVER_SIZE);
+                 sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
         CLASSERT (offsetof(struct lsd_client_data, lcd_padding) +
                  sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
 
@@ -735,108 +732,106 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
                 RETURN(-ENOMEM);
         rc = lut_init(NULL, lut, obd, NULL);
         if (rc)
-                GOTO(err_fsd, rc);
-        fsd = class_server_data(obd);
+                GOTO(err_lut, rc);
+        lsd = class_server_data(obd);
         if (last_rcvd_size == 0) {
                 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
 
-                memcpy(fsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(fsd->lsd_uuid));
-                fsd->lsd_last_transno = 0;
-                mount_count = fsd->lsd_mount_count = 0;
-                fsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
-                fsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
-                fsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
-                fsd->lsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
+                memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,sizeof(lsd->lsd_uuid));
+                lsd->lsd_last_transno = 0;
+                mount_count = lsd->lsd_mount_count = 0;
+                lsd->lsd_server_size = cpu_to_le32(LR_SERVER_SIZE);
+                lsd->lsd_client_start = cpu_to_le32(LR_CLIENT_START);
+                lsd->lsd_client_size = cpu_to_le16(LR_CLIENT_SIZE);
+                lsd->lsd_subdir_count = cpu_to_le16(FILTER_SUBDIR_COUNT);
                 filter->fo_subdir_count = FILTER_SUBDIR_COUNT;
                 /* OBD_COMPAT_OST is set in filter_connect_internal when the
                  * MDS first connects and assigns the OST index number. */
-                fsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_COMMON_LR|
+                lsd->lsd_feature_incompat = cpu_to_le32(OBD_INCOMPAT_COMMON_LR|
                                                         OBD_INCOMPAT_OST);
         } else {
-                rc = fsfilt_read_record(obd, filp, fsd, sizeof(*fsd), &off);
+                rc = fsfilt_read_record(obd, filp, lsd, sizeof(*lsd), &off);
                 if (rc) {
                         CDEBUG(D_INODE,"OBD filter: error reading %s: rc %d\n",
                                LAST_RCVD, rc);
-                        GOTO(err_fsd, rc);
+                        GOTO(err_lut, rc);
                 }
-                if (strcmp(fsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
+                if (strcmp(lsd->lsd_uuid, obd->obd_uuid.uuid) != 0) {
                         LCONSOLE_ERROR_MSG(0x134, "Trying to start OBD %s "
                                            "using the wrong disk %s. Were the "
                                            "/dev/ assignments rearranged?\n",
-                                           obd->obd_uuid.uuid, fsd->lsd_uuid);
-                        GOTO(err_fsd, rc = -EINVAL);
+                                           obd->obd_uuid.uuid, lsd->lsd_uuid);
+                        GOTO(err_lut, rc = -EINVAL);
                 }
-                mount_count = le64_to_cpu(fsd->lsd_mount_count);
-                filter->fo_subdir_count = le16_to_cpu(fsd->lsd_subdir_count);
+                mount_count = le64_to_cpu(lsd->lsd_mount_count);
+                filter->fo_subdir_count = le16_to_cpu(lsd->lsd_subdir_count);
                 /* COMPAT_146 */
                 /* Assume old last_rcvd format unless I_C_LR is set */
-                if (!(fsd->lsd_feature_incompat &
+                if (!(lsd->lsd_feature_incompat &
                       cpu_to_le32(OBD_INCOMPAT_COMMON_LR)))
-                        fsd->lsd_last_transno = fsd->lsd_compat14;
+                        lsd->lsd_last_transno = lsd->lsd_compat14;
                 /* end COMPAT_146 */
                 /* OBD_COMPAT_OST is set in filter_connect_internal when the
                  * MDS first connects and assigns the OST index number. */
-                fsd->lsd_feature_incompat |= cpu_to_le32(OBD_INCOMPAT_COMMON_LR|
+                lsd->lsd_feature_incompat |= cpu_to_le32(OBD_INCOMPAT_COMMON_LR|
                                                          OBD_INCOMPAT_OST);
         }
 
-        if (fsd->lsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
+        if (lsd->lsd_feature_incompat & ~cpu_to_le32(FILTER_INCOMPAT_SUPP)) {
                 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
-                       obd->obd_name, le32_to_cpu(fsd->lsd_feature_incompat) &
+                       obd->obd_name, le32_to_cpu(lsd->lsd_feature_incompat) &
                        ~FILTER_INCOMPAT_SUPP);
-                GOTO(err_fsd, rc = -EINVAL);
+                GOTO(err_lut, rc = -EINVAL);
         }
-        if (fsd->lsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
+        if (lsd->lsd_feature_rocompat & ~cpu_to_le32(FILTER_ROCOMPAT_SUPP)) {
                 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
-                       obd->obd_name, le32_to_cpu(fsd->lsd_feature_rocompat) &
+                       obd->obd_name, le32_to_cpu(lsd->lsd_feature_rocompat) &
                        ~FILTER_ROCOMPAT_SUPP);
                 /* Do something like remount filesystem read-only */
-                GOTO(err_fsd, rc = -EINVAL);
+                GOTO(err_lut, rc = -EINVAL);
         }
 
-        start_epoch = le32_to_cpu(fsd->lsd_start_epoch);
+        start_epoch = le32_to_cpu(lsd->lsd_start_epoch);
 
         CDEBUG(D_INODE, "%s: server start_epoch : %#x\n",
                obd->obd_name, start_epoch);
         CDEBUG(D_INODE, "%s: server last_transno : "LPX64"\n",
-               obd->obd_name, le64_to_cpu(fsd->lsd_last_transno));
+               obd->obd_name, le64_to_cpu(lsd->lsd_last_transno));
         CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
                obd->obd_name, mount_count + 1);
         CDEBUG(D_INODE, "%s: server data size: %u\n",
-               obd->obd_name, le32_to_cpu(fsd->lsd_server_size));
+               obd->obd_name, le32_to_cpu(lsd->lsd_server_size));
         CDEBUG(D_INODE, "%s: per-client data start: %u\n",
-               obd->obd_name, le32_to_cpu(fsd->lsd_client_start));
+               obd->obd_name, le32_to_cpu(lsd->lsd_client_start));
         CDEBUG(D_INODE, "%s: per-client data size: %u\n",
-               obd->obd_name, le32_to_cpu(fsd->lsd_client_size));
+               obd->obd_name, le32_to_cpu(lsd->lsd_client_size));
         CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
-               obd->obd_name, le16_to_cpu(fsd->lsd_subdir_count));
+               obd->obd_name, le16_to_cpu(lsd->lsd_subdir_count));
         CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
-               last_rcvd_size <= le32_to_cpu(fsd->lsd_client_start) ? 0 :
-               (last_rcvd_size - le32_to_cpu(fsd->lsd_client_start)) /
-                le16_to_cpu(fsd->lsd_client_size));
+               last_rcvd_size <= le32_to_cpu(lsd->lsd_client_start) ? 0 :
+               (last_rcvd_size - le32_to_cpu(lsd->lsd_client_start)) /
+                le16_to_cpu(lsd->lsd_client_size));
 
         if (!obd->obd_replayable) {
                 CWARN("%s: recovery support OFF\n", obd->obd_name);
                 GOTO(out, rc = 0);
         }
 
-        for (cl_idx = 0, off = le32_to_cpu(fsd->lsd_client_start);
+        OBD_ALLOC_PTR(lcd);
+        if (!lcd)
+                GOTO(err_client, rc = -ENOMEM);
+
+        for (cl_idx = 0, off = le32_to_cpu(lsd->lsd_client_start);
              off < last_rcvd_size; cl_idx++) {
                 __u64 last_rcvd;
                 struct obd_export *exp;
                 struct filter_export_data *fed;
 
-                if (!lcd) {
-                        OBD_ALLOC_PTR(lcd);
-                        if (!lcd)
-                                GOTO(err_client, rc = -ENOMEM);
-                }
-
                 /* Don't assume off is incremented properly by
                  * fsfilt_read_record(), in case sizeof(*lcd)
-                 * isn't the same as fsd->lsd_client_size.  */
-                off = le32_to_cpu(fsd->lsd_client_start) +
-                        cl_idx * le16_to_cpu(fsd->lsd_client_size);
+                 * isn't the same as lsd->lsd_client_size.  */
+                off = le32_to_cpu(lsd->lsd_client_start) +
+                        cl_idx * le16_to_cpu(lsd->lsd_client_size);
                 rc = fsfilt_read_record(obd, filp, lcd, sizeof(*lcd), &off);
                 if (rc) {
                         CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
@@ -854,60 +849,52 @@ static int filter_init_server_data(struct obd_device *obd, struct file * filp)
 
                 last_rcvd = le64_to_cpu(lcd->lcd_last_transno);
 
+                CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
+                       " srv lr: "LPU64"\n", lcd->lcd_uuid, cl_idx,
+                       last_rcvd, le64_to_cpu(lsd->lsd_last_transno));
+
                 /* These exports are cleaned up by filter_disconnect(), so they
                  * need to be set up like real exports as filter_connect() does.
                  */
                 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
-
-                CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
-                       " srv lr: "LPU64"\n", lcd->lcd_uuid, cl_idx,
-                       last_rcvd, le64_to_cpu(fsd->lsd_last_transno));
                 if (IS_ERR(exp)) {
                         if (PTR_ERR(exp) == -EALREADY) {
                                 /* export already exists, zero out this one */
-                                CERROR("Zeroing out duplicate export due to "
-                                       "bug 10479.\n");
-                                lcd->lcd_uuid[0] = '\0';
-                        } else {
-                                GOTO(err_client, rc = PTR_ERR(exp));
+                                CERROR("Duplicate export %s!\n", lcd->lcd_uuid);
+                                continue;
                         }
-                } else {
-                        fed = &exp->exp_filter_data;
-                        fed->fed_lcd = lcd;
-                        fed->fed_group = 0; /* will be assigned at connect */
-                        filter_export_stats_init(obd, exp, NULL);
-                        rc = filter_client_add(obd, exp, cl_idx);
-                        /* can't fail for existing client */
-                        LASSERTF(rc == 0, "rc = %d\n", rc);
-
-                        /* VBR: set export last committed */
-                        exp->exp_last_committed = last_rcvd;
-                        cfs_spin_lock(&exp->exp_lock);
-                        exp->exp_connecting = 0;
-                        exp->exp_in_recovery = 0;
-                        cfs_spin_unlock(&exp->exp_lock);
-                        cfs_spin_lock_bh(&obd->obd_processing_task_lock);
-                        obd->obd_max_recoverable_clients++;
-                        cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
-                        lcd = NULL;
-                        class_export_put(exp);
+                        OBD_FREE_PTR(lcd);
+                        GOTO(err_client, rc = PTR_ERR(exp));
                 }
 
-                /* Need to check last_rcvd even for duplicated exports. */
-                CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
-                       cl_idx, last_rcvd);
+                fed = &exp->exp_filter_data;
+                *fed->fed_ted.ted_lcd = *lcd;
+                fed->fed_group = 0; /* will be assigned at connect */
+                filter_export_stats_init(obd, exp, 0, NULL);
+                rc = filter_client_add(obd, exp, cl_idx);
+                /* can't fail for existing client */
+                LASSERTF(rc == 0, "rc = %d\n", rc);
+
+                /* VBR: set export last committed */
+                exp->exp_last_committed = last_rcvd;
+                cfs_spin_lock(&exp->exp_lock);
+                exp->exp_connecting = 0;
+                exp->exp_in_recovery = 0;
+                cfs_spin_unlock(&exp->exp_lock);
+                cfs_spin_lock_bh(&obd->obd_processing_task_lock);
+                obd->obd_max_recoverable_clients++;
+                cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
+                class_export_put(exp);
 
-                if (last_rcvd > le64_to_cpu(fsd->lsd_last_transno))
-                        fsd->lsd_last_transno = cpu_to_le64(last_rcvd);
+                if (last_rcvd > le64_to_cpu(lsd->lsd_last_transno))
+                        lsd->lsd_last_transno = cpu_to_le64(last_rcvd);
         }
+        OBD_FREE_PTR(lcd);
 
-        if (lcd)
-                OBD_FREE_PTR(lcd);
-
-        obd->obd_last_committed = le64_to_cpu(fsd->lsd_last_transno);
+        obd->obd_last_committed = le64_to_cpu(lsd->lsd_last_transno);
 out:
-        filter->fo_mount_count = mount_count + 1;
-        fsd->lsd_mount_count = cpu_to_le64(filter->fo_mount_count);
+        obd->u.obt.obt_mount_count = mount_count + 1;
+        lsd->lsd_mount_count = cpu_to_le64(obd->u.obt.obt_mount_count);
 
         /* save it, so mount count and last_transno is current */
         rc = filter_update_server_data(obd);
@@ -918,8 +905,8 @@ out:
 
 err_client:
         class_disconnect_exports(obd);
-err_fsd:
-        filter_free_server_data(filter);
+err_lut:
+        filter_free_server_data(&obd->u.obt);
         RETURN(rc);
 }
 
@@ -1051,8 +1038,8 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                         RETURN(PTR_ERR(dentry));
                 }
         } else {
-                dentry = simple_mkdir(filter->fo_dentry_O, filter->fo_vfsmnt,
-                                      name, 0700, 1);
+                dentry = simple_mkdir(filter->fo_dentry_O,
+                                      obd->u.obt.obt_vfsmnt, name, 0700, 1);
                 if (IS_ERR(dentry)) {
                         CERROR("cannot lookup/create O/%s: rc = %ld\n", name,
                                PTR_ERR(dentry));
@@ -1076,7 +1063,7 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                 GOTO(cleanup, rc);
         }
 
-        if (filter->fo_subdir_count && filter_group_is_mds(group)) {
+        if (filter->fo_subdir_count && fid_seq_is_mdt(group)) {
                 OBD_ALLOC(tmp_subdirs, sizeof(*tmp_subdirs));
                 if (tmp_subdirs == NULL)
                         GOTO(cleanup, rc = -ENOMEM);
@@ -1087,7 +1074,7 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                         snprintf(dir, sizeof(dir), "d%u", i);
 
                         tmp_subdirs->dentry[i] = simple_mkdir(dentry,
-                                                              filter->fo_vfsmnt,
+                                                              obd->u.obt.obt_vfsmnt,
                                                               dir, 0700, 1);
                         if (IS_ERR(tmp_subdirs->dentry[i])) {
                                 rc = PTR_ERR(tmp_subdirs->dentry[i]);
@@ -1140,7 +1127,7 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
 
         filter->fo_dentry_O_groups[group] = dentry;
         filter->fo_last_objid_files[group] = filp;
-        if (filter->fo_subdir_count && filter_group_is_mds(group)) {
+        if (filter->fo_subdir_count && fid_seq_is_mdt(group)) {
                 filter->fo_dentry_O_sub[group] = *tmp_subdirs;
                 OBD_FREE(tmp_subdirs, sizeof(*tmp_subdirs));
         }
@@ -1169,7 +1156,7 @@ static int filter_read_group_internal(struct obd_device *obd, int group,
                 if (new_files != NULL)
                         OBD_FREE(new_files, len * sizeof(*new_files));
         case 3:
-                if (filter->fo_subdir_count && filter_group_is_mds(group)) {
+                if (filter->fo_subdir_count && fid_seq_is_mdt(group)) {
                         for (i = 0; i < filter->fo_subdir_count; i++) {
                                 if (tmp_subdirs->dentry[i] != NULL)
                                         dput(tmp_subdirs->dentry[i]);
@@ -1211,7 +1198,7 @@ static int filter_prep_groups(struct obd_device *obd)
         loff_t off = 0;
         ENTRY;
 
-        O_dentry = simple_mkdir(current->fs->pwd, filter->fo_vfsmnt,
+        O_dentry = simple_mkdir(current->fs->pwd, obd->u.obt.obt_vfsmnt,
                                 "O", 0700, 1);
         CDEBUG(D_INODE, "got/created O: %p\n", O_dentry);
         if (IS_ERR(O_dentry)) {
@@ -1238,10 +1225,10 @@ static int filter_prep_groups(struct obd_device *obd)
         }
 
         if (off == 0)
-                last_group = FILTER_GROUP_MDS0;
+                last_group = FID_SEQ_OST_MDT0;
 
         CWARN("%s: initialize groups [%d,%d]\n", obd->obd_name,
-              FILTER_GROUP_MDS0, last_group);
+              FID_SEQ_OST_MDT0, last_group);
         filter->fo_committed_group = last_group;
         rc = filter_read_groups(obd, last_group, 1);
         if (rc)
@@ -1283,7 +1270,7 @@ static int filter_prep(struct obd_device *obd)
                        LAST_RCVD, rc);
                 GOTO(out, rc);
         }
-        filter->fo_rcvd_filp = file;
+        obd->u.obt.obt_rcvd_filp = file;
         if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
                 CERROR("%s is not a regular file!: mode = %o\n", LAST_RCVD,
                        file->f_dentry->d_inode->i_mode);
@@ -1338,11 +1325,11 @@ err_health_check:
         filter->fo_obt.obt_health_check_filp = NULL;
 err_server_data:
         target_recovery_fini(obd);
-        filter_free_server_data(filter);
+        filter_free_server_data(&obd->u.obt);
 err_filp:
-        if (filp_close(filter->fo_rcvd_filp, 0))
+        if (filp_close(obd->u.obt.obt_rcvd_filp, 0))
                 CERROR("can't close %s after error\n", LAST_RCVD);
-        filter->fo_rcvd_filp = NULL;
+        obd->u.obt.obt_rcvd_filp = NULL;
         goto out;
 }
 
@@ -1370,8 +1357,8 @@ static void filter_post(struct obd_device *obd)
                                i, rc);
         }
 
-        rc = filp_close(filter->fo_rcvd_filp, 0);
-        filter->fo_rcvd_filp = NULL;
+        rc = filp_close(obd->u.obt.obt_rcvd_filp, 0);
+        obd->u.obt.obt_rcvd_filp = NULL;
         if (rc)
                 CERROR("error closing %s: rc = %d\n", LAST_RCVD, rc);
 
@@ -1381,7 +1368,7 @@ static void filter_post(struct obd_device *obd)
                 CERROR("error closing %s: rc = %d\n", HEALTH_CHECK, rc);
 
         filter_cleanup_groups(obd);
-        filter_free_server_data(filter);
+        filter_free_server_data(&obd->u.obt);
         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 
         filter_free_capa_keys(filter);
@@ -1389,7 +1376,7 @@ static void filter_post(struct obd_device *obd)
 }
 
 static void filter_set_last_id(struct filter_obd *filter,
-                               obd_id id, obd_gr group)
+                               obd_id id, obd_seq group)
 {
         LASSERT(group <= filter->fo_group_count);
 
@@ -1398,7 +1385,7 @@ static void filter_set_last_id(struct filter_obd *filter,
         cfs_spin_unlock(&filter->fo_objidlock);
 }
 
-obd_id filter_last_id(struct filter_obd *filter, obd_gr group)
+obd_id filter_last_id(struct filter_obd *filter, obd_seq group)
 {
         obd_id id;
         LASSERT(group <= filter->fo_group_count);
@@ -1418,13 +1405,13 @@ static int filter_lock_dentry(struct obd_device *obd, struct dentry *dparent)
 }
 
 /* We never dget the object parent, so DON'T dput it either */
-struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
+struct dentry *filter_parent(struct obd_device *obd, obd_seq group, obd_id objid)
 {
         struct filter_obd *filter = &obd->u.filter;
         struct filter_subdirs *subdirs;
         LASSERT(group < filter->fo_group_count); /* FIXME: object groups */
 
-        if (!filter_group_is_mds(group) || filter->fo_subdir_count == 0)
+        if (!fid_seq_is_mdt(group) || filter->fo_subdir_count == 0)
                 return filter->fo_dentry_O_groups[group];
 
         subdirs = &filter->fo_dentry_O_sub[group];
@@ -1432,7 +1419,7 @@ struct dentry *filter_parent(struct obd_device *obd, obd_gr group, obd_id objid)
 }
 
 /* We never dget the object parent, so DON'T dput it either */
-struct dentry *filter_parent_lock(struct obd_device *obd, obd_gr group,
+struct dentry *filter_parent_lock(struct obd_device *obd, obd_seq group,
                                   obd_id objid)
 {
         unsigned long now = jiffies;
@@ -1464,7 +1451,7 @@ static void filter_parent_unlock(struct dentry *dparent)
  * internal to the filesystem code. */
 struct dentry *filter_fid2dentry(struct obd_device *obd,
                                  struct dentry *dir_dentry,
-                                 obd_gr group, obd_id id)
+                                 obd_seq group, obd_id id)
 {
         struct dentry *dparent = dir_dentry;
         struct dentry *dchild;
@@ -1488,7 +1475,7 @@ struct dentry *filter_fid2dentry(struct obd_device *obd,
         if (dir_dentry == NULL) {
                 dparent = filter_parent_lock(obd, group, id);
                 if (IS_ERR(dparent)) {
-                        CERROR("%s: error getting object "LPU64":"LPU64
+                        CERROR("%s: error getting object "POSTID
                                " parent: rc %ld\n", obd->obd_name,
                                id, group, PTR_ERR(dparent));
                         RETURN(dparent);
@@ -1605,11 +1592,10 @@ out:
  * Caller must hold child i_mutex, we drop it always.
  * Caller is also required to ensure that dchild->d_inode exists. */
 static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
-                                   obd_gr group, struct dentry *dparent,
+                                   obd_seq group, struct dentry *dparent,
                                    struct dentry *dchild)
 {
         struct inode *inode = dchild->d_inode;
-        struct filter_obd *filter = &obd->u.filter;
         int rc;
 
         if (inode->i_nlink != 1 || atomic_read(&inode->i_count) != 1) {
@@ -1619,7 +1605,7 @@ static int filter_destroy_internal(struct obd_device *obd, obd_id objid,
                        atomic_read(&inode->i_count));
         }
 
-        rc = filter_vfs_unlink(dparent->d_inode, dchild, filter->fo_vfsmnt);
+        rc = filter_vfs_unlink(dparent->d_inode, dchild, obd->u.obt.obt_vfsmnt);
         if (rc)
                 CERROR("error unlinking objid %.*s: rc %d\n",
                        dchild->d_name.len, dchild->d_name.name, rc);
@@ -1985,6 +1971,14 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
                 struct lustre_sb_info *lsi = s2lsi(lmi->lmi_sb);
                 mnt = lmi->lmi_mnt;
                 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
+
+                /* gets recovery timeouts from mount data */
+                if (lsi->lsi_lmd && lsi->lsi_lmd->lmd_recovery_time_soft)
+                        obd->obd_recovery_timeout =
+                                lsi->lsi_lmd->lmd_recovery_time_soft;
+                if (lsi->lsi_lmd && lsi->lsi_lmd->lmd_recovery_time_hard)
+                        obd->obd_recovery_time_hard =
+                                lsi->lsi_lmd->lmd_recovery_time_hard;
         } else {
                 /* old path - used by lctl */
                 CERROR("Using old MDS mount method\n");
@@ -2024,8 +2018,9 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
                 }
         }
 
-        filter->fo_vfsmnt = mnt;
+        obd->u.obt.obt_vfsmnt = mnt;
         obd->u.obt.obt_sb = mnt->mnt_sb;
+        obd->u.obt.obt_magic = OBT_MAGIC;
         filter->fo_fstype = mnt->mnt_sb->s_type->name;
         CDEBUG(D_SUPER, "%s: mnt = %p\n", filter->fo_fstype, mnt);
 
@@ -2052,6 +2047,8 @@ int filter_common_setup(struct obd_device *obd, struct lustre_cfg* lcfg,
         filter->fo_readcache_max_filesize = FILTER_MAX_CACHE_SIZE;
         filter->fo_fmd_max_num = FILTER_FMD_MAX_NUM_DEFAULT;
         filter->fo_fmd_max_age = FILTER_FMD_MAX_AGE_DEFAULT;
+        filter->fo_syncjournal = 0; /* Don't sync journals on i/o by default */
+        filter_slc_set(filter); /* initialize sync on lock cancel */
 
         rc = filter_prep(obd);
         if (rc)
@@ -2405,7 +2402,7 @@ filter_find_olg_internal(struct filter_obd *filter, int group)
 
         LASSERT_SPIN_LOCKED(&filter->fo_llog_list_lock);
         cfs_list_for_each_entry(olg, &filter->fo_llog_list, olg_list) {
-                if (olg->olg_group == group)
+                if (olg->olg_seq == group)
                         RETURN(olg);
         }
         RETURN(NULL);
@@ -2421,7 +2418,7 @@ struct obd_llog_group *filter_find_olg(struct obd_device *obd, int group)
 
         filter = &obd->u.filter;
 
-        if (group == FILTER_GROUP_LLOG)
+        if (group == FID_SEQ_LLOG)
                 RETURN(&obd->obd_olg);
 
         cfs_spin_lock(&filter->fo_llog_list_lock);
@@ -2443,7 +2440,7 @@ struct obd_llog_group *filter_find_create_olg(struct obd_device *obd, int group)
 
         filter = &obd->u.filter;
 
-        if (group == FILTER_GROUP_LLOG)
+        if (group == FID_SEQ_LLOG)
                 RETURN(&obd->obd_olg);
 
         cfs_spin_lock(&filter->fo_llog_list_lock);
@@ -2496,12 +2493,12 @@ static int filter_llog_connect(struct obd_export *exp,
 
         CDEBUG(D_OTHER, "%s: LLog connect for: "LPX64"/"LPX64":%x\n",
                obd->obd_name, body->lgdc_logid.lgl_oid,
-               body->lgdc_logid.lgl_ogr, body->lgdc_logid.lgl_ogen);
+               body->lgdc_logid.lgl_oseq, body->lgdc_logid.lgl_ogen);
 
-        olg = filter_find_olg(obd, body->lgdc_logid.lgl_ogr);
+        olg = filter_find_olg(obd, body->lgdc_logid.lgl_oseq);
         if (!olg) {
                 CERROR(" %s: can not find olg of group %d\n",
-                       obd->obd_name, (int)body->lgdc_logid.lgl_ogr);
+                       obd->obd_name, (int)body->lgdc_logid.lgl_oseq);
                 RETURN(-ENOENT);
         }
         llog_group_set_export(olg, exp);
@@ -2512,7 +2509,7 @@ static int filter_llog_connect(struct obd_export *exp,
 
         CWARN("%s: Recovery from log "LPX64"/"LPX64":%x\n",
               obd->obd_name, body->lgdc_logid.lgl_oid,
-              body->lgdc_logid.lgl_ogr, body->lgdc_logid.lgl_ogen);
+              body->lgdc_logid.lgl_oseq, body->lgdc_logid.lgl_ogen);
 
         cfs_spin_lock_bh(&obd->obd_processing_task_lock);
         obd->u.filter.fo_mds_ost_sync = 1;
@@ -2556,7 +2553,7 @@ static int filter_llog_preclean(struct obd_device *obd)
                 rc = filter_olg_fini(olg);
                 if (rc)
                         CERROR("failed to cleanup llogging subsystem for %u\n",
-                               olg->olg_group);
+                               olg->olg_seq);
                 OBD_FREE_PTR(olg);
         }
 
@@ -2612,7 +2609,7 @@ static int filter_cleanup(struct obd_device *obd)
         LL_DQUOT_OFF(obd->u.obt.obt_sb);
         shrink_dcache_sb(obd->u.obt.obt_sb);
 
-        server_put_mount(obd->obd_name, filter->fo_vfsmnt);
+        server_put_mount(obd->obd_name, obd->u.obt.obt_vfsmnt);
         obd->u.obt.obt_sb = NULL;
 
         fsfilt_put_ops(obd->obd_fsops);
@@ -2698,9 +2695,9 @@ static int filter_connect_internal(struct obd_export *exp,
                                            data->ocd_index);
                         RETURN(-EBADF);
                 }
-                /* FIXME: Do the same with the MDS UUID and fsd_peeruuid.
+                /* FIXME: Do the same with the MDS UUID and lsd_peeruuid.
                  * FIXME: We don't strictly need the COMPAT flag for that,
-                 * FIXME: as fsd_peeruuid[0] will tell us if that is set.
+                 * FIXME: as lsd_peeruuid[0] will tell us if that is set.
                  * FIXME: We needed it for the index, as index 0 is valid. */
         }
 
@@ -2753,7 +2750,7 @@ static int filter_reconnect(const struct lu_env *env,
 
         rc = filter_connect_internal(exp, data, 1);
         if (rc == 0)
-                filter_export_stats_init(obd, exp, localdata);
+                filter_export_stats_init(obd, exp, 1, localdata);
 
         RETURN(rc);
 }
@@ -2767,8 +2764,6 @@ static int filter_connect(const struct lu_env *env,
         struct lvfs_run_ctxt saved;
         struct lustre_handle conn = { 0 };
         struct obd_export *lexp;
-        struct filter_export_data *fed;
-        struct lsd_client_data *lcd = NULL;
         __u32 group;
         int rc;
         ENTRY;
@@ -2782,22 +2777,15 @@ static int filter_connect(const struct lu_env *env,
         lexp = class_conn2export(&conn);
         LASSERT(lexp != NULL);
 
-        fed = &lexp->exp_filter_data;
-
         rc = filter_connect_internal(lexp, data, 0);
         if (rc)
                 GOTO(cleanup, rc);
 
-        filter_export_stats_init(obd, lexp, localdata);
+        filter_export_stats_init(obd, lexp, 0, localdata);
         if (obd->obd_replayable) {
-                OBD_ALLOC(lcd, sizeof(*lcd));
-                if (!lcd) {
-                        CERROR("filter: out of memory for client data\n");
-                        GOTO(cleanup, rc = -ENOMEM);
-                }
-
+                struct lsd_client_data *lcd = lexp->exp_target_data.ted_lcd;
+                LASSERT(lcd);
                 memcpy(lcd->lcd_uuid, cluuid, sizeof(lcd->lcd_uuid));
-                fed->fed_lcd = lcd;
                 rc = filter_client_add(obd, lexp, -1);
                 if (rc)
                         GOTO(cleanup, rc);
@@ -2820,10 +2808,6 @@ static int filter_connect(const struct lu_env *env,
 
 cleanup:
         if (rc) {
-                if (lcd) {
-                        OBD_FREE_PTR(lcd);
-                        fed->fed_lcd = NULL;
-                }
                 class_disconnect(lexp);
                 lprocfs_exp_cleanup(lexp);
                 *exp = NULL;
@@ -2956,12 +2940,11 @@ static int filter_destroy_export(struct obd_export *exp)
 
         target_destroy_export(exp);
         ldlm_destroy_export(exp);
+        lut_client_free(exp);
 
         if (obd_uuid_equals(&exp->exp_client_uuid, &exp->exp_obd->obd_uuid))
                 RETURN(0);
 
-        lut_client_free(exp);
-
         if (!exp->exp_obd->obd_replayable)
                 fsfilt_sync(exp->exp_obd, exp->exp_obd->u.obt.obt_sb);
 
@@ -2975,7 +2958,7 @@ static int filter_destroy_export(struct obd_export *exp)
         }
 
         if (!(exp->exp_flags & OBD_OPT_FORCE))
-                filter_grant_sanity_check(exp->exp_obd, __FUNCTION__);
+                filter_grant_sanity_check(exp->exp_obd, __func__);
 
         RETURN(0);
 }
@@ -2999,24 +2982,24 @@ static void filter_sync_llogs(struct obd_device *obd, struct obd_export *dexp)
                 group = 1 << 30;
                 cfs_spin_lock(&filter->fo_llog_list_lock);
                 cfs_list_for_each_entry(olg, &filter->fo_llog_list, olg_list) {
-                        if (olg->olg_group <= worked) {
+                        if (olg->olg_seq <= worked) {
                                 /* this group is already synced */
                                 continue;
                         }
-                        if (group < olg->olg_group) {
+                        if (group < olg->olg_seq) {
                                 /* we have group with smaller number to sync */
                                 continue;
                         }
                         /* store current minimal group */
                         olg_min = olg;
-                        group = olg->olg_group;
+                        group = olg->olg_seq;
                 }
                 cfs_spin_unlock(&filter->fo_llog_list_lock);
 
                 if (olg_min == NULL)
                         break;
 
-                worked = olg_min->olg_group;
+                worked = olg_min->olg_seq;
                 if (olg_min->olg_exp &&
                     (dexp == olg_min->olg_exp || dexp == NULL)) {
                         int err;
@@ -3045,7 +3028,7 @@ static int filter_disconnect(struct obd_export *exp)
         class_export_get(exp);
 
         if (!(exp->exp_flags & OBD_OPT_FORCE))
-                filter_grant_sanity_check(obd, __FUNCTION__);
+                filter_grant_sanity_check(obd, __func__);
         filter_grant_discard(exp);
 
         /* Flush any remaining cancel messages out to the target */
@@ -3055,7 +3038,8 @@ static int filter_disconnect(struct obd_export *exp)
 
         rc = server_disconnect_export(exp);
 
-        if (exp->exp_obd->obd_replayable)
+        /* Do not erase record for recoverable client. */
+        if (obd->obd_replayable && (!obd->obd_fail || exp->exp_failed))
                 filter_client_del(exp);
         else
                 fsfilt_sync(obd, obd->u.obt.obt_sb);
@@ -3084,27 +3068,23 @@ static int filter_ping(struct obd_export *exp)
         return 0;
 }
 
-struct dentry *__filter_oa2dentry(struct obd_device *obd, struct obdo *oa,
+struct dentry *__filter_oa2dentry(struct obd_device *obd, struct ost_id *ostid,
                                   const char *what, int quiet)
 {
         struct dentry *dchild = NULL;
-        obd_gr group = 0;
 
-        if (oa->o_valid & OBD_MD_FLGROUP)
-                group = oa->o_gr;
-
-        dchild = filter_fid2dentry(obd, NULL, group, oa->o_id);
+        dchild = filter_fid2dentry(obd, NULL,  ostid->oi_seq, ostid->oi_id);
 
         if (IS_ERR(dchild)) {
-                CERROR("%s error looking up object: "LPU64":"LPU64"\n",
-                       what, group, oa->o_id);
+                CERROR("%s error looking up object: "POSTID"\n",
+                       what, ostid->oi_id, ostid->oi_seq);
                 RETURN(dchild);
         }
 
         if (dchild->d_inode == NULL) {
                 if (!quiet)
-                        CERROR("%s: %s on non-existent object: "LPU64"\n",
-                               obd->obd_name, what, oa->o_id);
+                        CERROR("%s: %s on non-existent object: "POSTID" \n",
+                               obd->obd_name, what, ostid->oi_id,ostid->oi_seq);
                 f_dput(dchild);
                 RETURN(ERR_PTR(-ENOENT));
         }
@@ -3119,8 +3099,7 @@ static int filter_getattr(struct obd_export *exp, struct obd_info *oinfo)
         int rc = 0;
         ENTRY;
 
-        LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
-        rc = filter_auth_capa(exp, NULL, oinfo->oi_oa->o_gr,
+        rc = filter_auth_capa(exp, NULL, oinfo->oi_oa->o_seq,
                               oinfo_capa(oinfo), CAPA_OPC_META_READ);
         if (rc)
                 RETURN(rc);
@@ -3131,13 +3110,13 @@ static int filter_getattr(struct obd_export *exp, struct obd_info *oinfo)
                 RETURN(-EINVAL);
         }
 
-        dentry = filter_oa2dentry(obd, oinfo->oi_oa);
+        dentry = filter_oa2dentry(obd, &oinfo->oi_oa->o_oi);
         if (IS_ERR(dentry))
                 RETURN(PTR_ERR(dentry));
 
         /* Limit the valid bits in the return data to what we actually use */
         oinfo->oi_oa->o_valid = OBD_MD_FLID;
-        obdo_from_inode(oinfo->oi_oa, dentry->d_inode, FILTER_VALID_FLAGS);
+        obdo_from_inode(oinfo->oi_oa, dentry->d_inode, NULL, FILTER_VALID_FLAGS);
 
         f_dput(dentry);
         RETURN(rc);
@@ -3156,19 +3135,21 @@ int filter_update_fidea(struct obd_export *exp, struct inode *inode,
                 struct filter_fid ff;
 
                 if (!(oa->o_valid & OBD_MD_FLGROUP))
-                        oa->o_gr = 0;
+                        oa->o_seq = 0;
                 /* packing fid and converting it to LE for storing into EA.
                  * Here ->o_stripe_idx should be filled by LOV and rest of
                  * fields - by client. */
-                ff.ff_fid.id = cpu_to_le64(oa->o_fid);
-                ff.ff_fid.f_type = cpu_to_le32(oa->o_stripe_idx);
-                ff.ff_fid.generation = cpu_to_le32(oa->o_generation);
+                ff.ff_parent.f_seq = cpu_to_le64(oa->o_parent_seq);
+                ff.ff_parent.f_oid = cpu_to_le32(oa->o_parent_oid);
+                /* XXX: we are ignoring o_parent_ver here, since this should
+                 *      be the same for all objects in this fileset. */
+                ff.ff_parent.f_ver = cpu_to_le32(oa->o_stripe_idx);
                 ff.ff_objid = cpu_to_le64(oa->o_id);
-                ff.ff_group = cpu_to_le64(oa->o_gr);
+                ff.ff_seq = cpu_to_le64(oa->o_seq);
 
-                CDEBUG(D_INODE, "storing filter fid EA ("LPU64"/%u/%u"
-                       LPU64"/"LPU64")\n", oa->o_fid, oa->o_stripe_idx,
-                       oa->o_generation, oa->o_id, oa->o_gr);
+                CDEBUG(D_INODE, "storing filter fid EA (parent "DFID" "
+                       LPU64"/"LPU64")\n", PFID(&ff.ff_parent), oa->o_id,
+                       oa->o_seq);
 
                 rc = fsfilt_set_md(obd, inode, handle, &ff, sizeof(ff), "fid");
                 if (rc)
@@ -3296,9 +3277,9 @@ int filter_setattr_internal(struct obd_export *exp, struct dentry *dentry,
         if (OBD_FAIL_CHECK(OBD_FAIL_OST_SETATTR_CREDITS))
                 fsfilt_extend(exp->exp_obd, inode, 0, handle);
 
-        /* The truncate might have used up our transaction credits.  Make
-         * sure we have one left for the last_rcvd update. */
-        err = fsfilt_extend(exp->exp_obd, inode, 1, handle);
+       /* The truncate might have used up our transaction credits.  Make sure
+        * we have two left for the last_rcvd and VBR inode version updates. */
+        err = fsfilt_extend(exp->exp_obd, inode, 2, handle);
 
         rc = filter_finish_transno(exp, inode, oti, rc, sync);
         if (sync) {
@@ -3369,18 +3350,17 @@ int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
         if (oa->o_valid & OBD_FL_TRUNC)
                 opc |= CAPA_OPC_OSS_TRUNC;
 
-        LASSERT(oa->o_valid & OBD_MD_FLGROUP);
-        rc = filter_auth_capa(exp, NULL, oa->o_gr, capa, opc);
+        rc = filter_auth_capa(exp, NULL, oa->o_seq, capa, opc);
         if (rc)
                 RETURN(rc);
 
         if (oa->o_valid & (OBD_MD_FLUID | OBD_MD_FLGID)) {
-                rc = filter_capa_fixoa(exp, oa, oa->o_gr, capa);
+                rc = filter_capa_fixoa(exp, oa, oa->o_seq, capa);
                 if (rc)
                         RETURN(rc);
         }
 
-        osc_build_res_name(oa->o_id, oa->o_gr, &res_id);
+        osc_build_res_name(oa->o_id, oa->o_seq, &res_id);
         /* This would be very bad - accidentally truncating a file when
          * changing the time or similar - bug 12203. */
         if (oa->o_valid & OBD_MD_FLSIZE &&
@@ -3388,20 +3368,19 @@ int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
                 static char mdsinum[48];
 
                 if (oa->o_valid & OBD_MD_FLFID)
-                        snprintf(mdsinum, sizeof(mdsinum) - 1,
-                                 " of inode "LPU64"/%u", oa->o_fid,
-                                 oa->o_generation);
+                        snprintf(mdsinum, sizeof(mdsinum) - 1, " of inode "DFID,
+                                 oa->o_parent_seq, oa->o_parent_oid,
+                                 oa->o_parent_ver);
                 else
                         mdsinum[0] = '\0';
 
-                CERROR("%s: setattr from %s trying to truncate objid "LPU64
-                       " %s\n",
-                       exp->exp_obd->obd_name, obd_export_nid2str(exp),
-                       oa->o_id, mdsinum);
+                CERROR("%s: setattr from %s trying to truncate objid "POSTID
+                       "%s\n", exp->exp_obd->obd_name, obd_export_nid2str(exp),
+                       oa->o_id, oa->o_seq, mdsinum);
                 RETURN(-EPERM);
         }
 
-        dentry = __filter_oa2dentry(exp->exp_obd, oa, __FUNCTION__, 1);
+        dentry = __filter_oa2dentry(exp->exp_obd, &oinfo->oi_oa->o_oi, __func__, 1);
         if (IS_ERR(dentry))
                 RETURN(PTR_ERR(dentry));
 
@@ -3418,7 +3397,7 @@ int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
         if (oa->o_valid &
             (OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME)) {
                 down_write(&dentry->d_inode->i_alloc_sem);
-                fmd = filter_fmd_get(exp, oa->o_id, oa->o_gr);
+                fmd = filter_fmd_get(exp, oa->o_id, oa->o_seq);
                 if (fmd && fmd->fmd_mactime_xid < oti->oti_xid)
                         fmd->fmd_mactime_xid = oti->oti_xid;
                 filter_fmd_put(exp, fmd);
@@ -3443,7 +3422,7 @@ int filter_setattr(struct obd_export *exp, struct obd_info *oinfo,
         oa->o_valid = OBD_MD_FLID;
 
         /* Quota release need uid/gid info */
-        obdo_from_inode(oa, dentry->d_inode,
+        obdo_from_inode(oa, dentry->d_inode, NULL,
                         FILTER_VALID_FLAGS | OBD_MD_FLUID | OBD_MD_FLGID);
 
         EXIT;
@@ -3509,7 +3488,7 @@ static int filter_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
         RETURN(lsm_size);
 }
 
-/* caller must hold fo_create_locks[oa->o_gr] */
+/* caller must hold fo_create_locks[oa->o_seq] */
 static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
                                      struct filter_obd *filter)
 {
@@ -3519,24 +3498,21 @@ static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
         int skip_orphan;
         ENTRY;
 
-        LASSERT(oa);
-        LASSERT_MDS_GROUP(oa->o_gr);
-        LASSERT(oa->o_valid & OBD_MD_FLGROUP);
-        LASSERT(down_trylock(&filter->fo_create_locks[oa->o_gr]) != 0);
+        LASSERT(down_trylock(&filter->fo_create_locks[oa->o_seq]) != 0);
 
         memset(&doa, 0, sizeof(doa));
 
         doa.o_valid |= OBD_MD_FLGROUP;
-        doa.o_gr = oa->o_gr;
+        doa.o_seq = oa->o_seq;
         doa.o_mode = S_IFREG;
 
-        if (!cfs_test_bit(doa.o_gr, &filter->fo_destroys_in_progress)) {
+        if (!cfs_test_bit(doa.o_seq, &filter->fo_destroys_in_progress)) {
                 CERROR("%s:["LPU64"] destroys_in_progress already cleared\n",
-                       exp->exp_obd->obd_name, doa.o_gr);
+                       exp->exp_obd->obd_name, doa.o_seq);
                 RETURN(0);
         }
 
-        last = filter_last_id(filter, doa.o_gr);
+        last = filter_last_id(filter, doa.o_seq);
 
         skip_orphan = !!(exp->exp_connect_flags & OBD_CONNECT_SKIP_ORPHAN);
 
@@ -3554,32 +3530,32 @@ static int filter_destroy_precreated(struct obd_export *exp, struct obdo *oa,
                 /* update last_id on disk periodically so that if we restart
                  * we don't need to re-scan all of the just-deleted objects. */
                 if ((id & 511) == 0 && !skip_orphan) {
-                        filter_set_last_id(filter, id - 1, doa.o_gr);
-                        filter_update_last_objid(exp->exp_obd, doa.o_gr, 0);
+                        filter_set_last_id(filter, id - 1, doa.o_seq);
+                        filter_update_last_objid(exp->exp_obd, doa.o_seq, 0);
                 }
         }
 
         CDEBUG(D_HA, "%s: after destroy: set last_objids["LPU64"] = "LPU64"\n",
-               exp->exp_obd->obd_name, doa.o_gr, oa->o_id);
+               exp->exp_obd->obd_name, doa.o_seq, oa->o_id);
 
         if (!skip_orphan) {
-                filter_set_last_id(filter, id, doa.o_gr);
-                rc = filter_update_last_objid(exp->exp_obd, doa.o_gr, 1);
+                filter_set_last_id(filter, id, doa.o_seq);
+                rc = filter_update_last_objid(exp->exp_obd, doa.o_seq, 1);
         } else {
                 /* don't reuse orphan object, return last used objid */
                 oa->o_id = last;
                 rc = 0;
         }
-        cfs_clear_bit(doa.o_gr, &filter->fo_destroys_in_progress);
+        cfs_clear_bit(doa.o_seq, &filter->fo_destroys_in_progress);
 
         RETURN(rc);
 }
 
 static int filter_precreate(struct obd_device *obd, struct obdo *oa,
-                            obd_gr group, int *num);
+                            obd_seq group, int *num);
 /* returns a negative error or a nonnegative number of files to create */
 static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
-                                   obd_gr group, struct obd_trans_info *oti)
+                                   obd_seq group, struct obd_trans_info *oti)
 {
         struct obd_device *obd = exp->exp_obd;
         struct filter_obd *filter = &obd->u.filter;
@@ -3633,7 +3609,7 @@ static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
                         GOTO(out, rc = 0);
                 }
                 /* only precreate if group == 0 and o_id is specfied */
-                if (!filter_group_is_mds(group) || oa->o_id == 0)
+                if (!fid_seq_is_mdt(group) || oa->o_id == 0)
                         diff = 1;
                 else
                         diff = oa->o_id - filter_last_id(filter, group);
@@ -3648,7 +3624,7 @@ static int filter_handle_precreate(struct obd_export *exp, struct obdo *oa,
                 oa->o_id = filter_last_id(&obd->u.filter, group);
                 rc = filter_precreate(obd, oa, group, &diff);
                 oa->o_id = filter_last_id(&obd->u.filter, group);
-                oa->o_gr = group;
+                oa->o_seq = group;
                 oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
                 GOTO(out, rc);
         }
@@ -3681,7 +3657,7 @@ static int filter_statfs(struct obd_device *obd, struct obd_statfs *osfs,
                filter->fo_tot_pending,
                osfs->os_bfree << blockbits, osfs->os_bavail << blockbits);
 
-        filter_grant_sanity_check(obd, __FUNCTION__);
+        filter_grant_sanity_check(obd, __func__);
 
         osfs->os_bavail -= min(osfs->os_bavail, GRANT_FOR_LLOG(obd) +
                                ((filter->fo_tot_dirty + filter->fo_tot_pending +
@@ -3761,7 +3737,7 @@ static __u64 filter_calc_free_inodes(struct obd_device *obd)
  * Caller must hold fo_create_locks[group]
  */
 static int filter_precreate(struct obd_device *obd, struct obdo *oa,
-                            obd_gr group, int *num)
+                            obd_seq group, int *num)
 {
         struct dentry *dchild = NULL, *dparent = NULL;
         struct filter_obd *filter;
@@ -3786,12 +3762,13 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
                 OBD_ALLOC(osfs, sizeof(*osfs));
                 if (osfs == NULL)
                         RETURN(-ENOMEM);
-                rc = filter_statfs(obd, osfs, cfs_time_current_64() - CFS_HZ,
+                rc = filter_statfs(obd, osfs,
+                                   cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
                                    0);
                 if (rc == 0 && osfs->os_bavail < (osfs->os_blocks >> 10)) {
                         CDEBUG(D_RPCTRACE,"%s: not enough space for create "
                                LPU64"\n", obd->obd_name, osfs->os_bavail <<
-                               filter->fo_vfsmnt->mnt_sb->s_blocksize_bits);
+                               obd->u.obt.obt_vfsmnt->mnt_sb->s_blocksize_bits);
                         *num = 0;
                         rc = -ENOSPC;
                 }
@@ -3826,6 +3803,14 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
                 } else
                         next_id = filter_last_id(filter, group) + 1;
 
+                /* Temporary solution for oid in CMD before fid-on-OST */
+                if ((fid_seq_is_mdt0(oa->o_seq) && next_id >= IDIF_MAX_OID) &&
+                    (fid_seq_is_cmd(oa->o_seq) && next_id >= OBIF_MAX_OID)) {
+                        CERROR("%s:"POSTID" hit the max IDIF_MAX_OID(1<<48)!\n",
+                                obd->obd_name, next_id, group);
+                        GOTO(cleanup, rc = -ENOSPC);
+                }
+
                 dparent = filter_parent_lock(obd, group, next_id);
                 if (IS_ERR(dparent))
                         GOTO(cleanup, rc = PTR_ERR(dparent));
@@ -3871,7 +3856,7 @@ static int filter_precreate(struct obd_device *obd, struct obdo *oa,
                         GOTO(cleanup, rc = PTR_ERR(handle));
                 cleanup_phase = 3;
 
-                CDEBUG(D_INODE, "%s: filter_precreate(od->o_gr="LPU64
+                CDEBUG(D_INODE, "%s: filter_precreate(od->o_seq="LPU64
                        ",od->o_id="LPU64")\n", obd->obd_name, group,
                        next_id);
 
@@ -3924,6 +3909,7 @@ set_last_id:
                 if (rc)
                         break;
                 if (cfs_time_after(jiffies, enough_time)) {
+                        i++;
                         CDEBUG(D_RPCTRACE,
                                "%s: precreate slow - want %d got %d \n",
                                obd->obd_name, *num, i);
@@ -3933,41 +3919,35 @@ set_last_id:
         *num = i;
 
         CDEBUG(D_RPCTRACE,
-               "%s: created %d objects for group "LPU64": "LPU64" rc %d\n",
-               obd->obd_name, i, group, filter->fo_last_objids[group], rc);
+               "%s: created %d objects for group "POSTID" rc %d\n",
+               obd->obd_name, i, filter->fo_last_objids[group], group, rc);
 
         RETURN(rc);
 }
 
-static int filter_create(struct obd_export *exp, struct obdo *oa,
-                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
+int filter_create(struct obd_export *exp, struct obdo *oa,
+                  struct lov_stripe_md **ea, struct obd_trans_info *oti)
 {
         struct obd_device *obd = exp->exp_obd;
         struct filter_export_data *fed;
         struct filter_obd *filter;
         struct lvfs_run_ctxt saved;
         struct lov_stripe_md *lsm = NULL;
-        int rc = 0, diff, group = oa->o_gr;
+        int rc = 0, diff;
         ENTRY;
 
-        CDEBUG(D_INODE, "%s: filter_create(od->o_gr="LPU64",od->o_id="
-               LPU64")\n", obd->obd_name, oa->o_gr, oa->o_id);
-
-        if (!(oa->o_valid & OBD_MD_FLGROUP)) {
-                CERROR("!!! nid %s sent invalid object group %d\n",
-                        obd_export_nid2str(exp), group);
-                RETURN(-EINVAL);
-        }
+        CDEBUG(D_INODE, "%s: filter_create(group="LPU64",id="
+               LPU64")\n", obd->obd_name, oa->o_seq, oa->o_id);
 
         fed = &exp->exp_filter_data;
         filter = &obd->u.filter;
 
-        if (fed->fed_group != group) {
-                CERROR("!!! this export (nid %s) used object group %d "
-                        "earlier; now it's trying to use group %d!  This could "
-                        "be a bug in the MDS. Please report to "
-                        "http://bugzilla.lustre.org/\n",
-                        obd_export_nid2str(exp), fed->fed_group, group);
+        if (fed->fed_group != oa->o_seq) {
+                CERROR("%s: this export (nid %s) used object group %d "
+                        "earlier; now it's trying to use group "LPU64"!"
+                        " This could be a bug in the MDS. Please report to "
+                        "http://bugzilla.lustre.org/\n", obd->obd_name,
+                        obd_export_nid2str(exp), fed->fed_group, oa->o_seq);
                 RETURN(-ENOTUNIQ);
         }
 
@@ -3985,19 +3965,19 @@ static int filter_create(struct obd_export *exp, struct obdo *oa,
 
         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
             (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
-                if (oa->o_id > filter_last_id(filter, oa->o_gr)) {
+                if (!obd->obd_recovering ||
+                    oa->o_id > filter_last_id(filter, oa->o_seq)) {
                         CERROR("recreate objid "LPU64" > last id "LPU64"\n",
-                               oa->o_id, filter_last_id(filter,
-                                                        oa->o_gr));
+                               oa->o_id, filter_last_id(filter, oa->o_seq));
                         rc = -EINVAL;
                 } else {
                         diff = 1;
-                        cfs_down(&filter->fo_create_locks[oa->o_gr]);
-                        rc = filter_precreate(obd, oa, oa->o_gr, &diff);
-                        cfs_up(&filter->fo_create_locks[oa->o_gr]);
+                        cfs_down(&filter->fo_create_locks[oa->o_seq]);
+                        rc = filter_precreate(obd, oa, oa->o_seq, &diff);
+                        cfs_up(&filter->fo_create_locks[oa->o_seq]);
                 }
         } else {
-                rc = filter_handle_precreate(exp, oa, oa->o_gr, oti);
+                rc = filter_handle_precreate(exp, oa, oa->o_seq, oti);
         }
 
         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
@@ -4031,8 +4011,7 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
         struct iattr iattr;
         ENTRY;
 
-        LASSERT(oa->o_valid & OBD_MD_FLGROUP);
-        rc = filter_auth_capa(exp, NULL, oa->o_gr,
+        rc = filter_auth_capa(exp, NULL, oa->o_seq,
                               (struct lustre_capa *)capa, CAPA_OPC_OSS_DESTROY);
         if (rc)
                 RETURN(rc);
@@ -4043,26 +4022,26 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
         cleanup_phase = 1;
 
-        CDEBUG(D_INODE, "%s: filter_destroy(od->o_gr="LPU64",od->o_id="
-               LPU64")\n", obd->obd_name, oa->o_gr, oa->o_id);
+        CDEBUG(D_INODE, "%s: filter_destroy(group="LPU64",oid="
+               LPU64")\n", obd->obd_name, oa->o_seq, oa->o_id);
 
-        dchild = filter_fid2dentry(obd, NULL, oa->o_gr, oa->o_id);
+        dchild = filter_fid2dentry(obd, NULL, oa->o_seq, oa->o_id);
         if (IS_ERR(dchild))
                 GOTO(cleanup, rc = PTR_ERR(dchild));
         cleanup_phase = 2;
 
         if (dchild->d_inode == NULL) {
-                CDEBUG(D_INODE, "destroying non-existent object "LPU64"\n",
-                       oa->o_id);
+                CDEBUG(D_INODE, "destroying non-existent object "POSTID"\n",
+                       oa->o_id, oa->o_seq);
                 /* If object already gone, cancel cookie right now */
                 if (oa->o_valid & OBD_MD_FLCOOKIE) {
                         struct llog_ctxt *ctxt;
                         struct obd_llog_group *olg;
 
-                        olg = filter_find_olg(obd, oa->o_gr);
+                        olg = filter_find_olg(obd, oa->o_seq);
                         if (!olg) {
                                CERROR(" %s: can not find olg of group %d\n",
-                                      obd->obd_name, (int)oa->o_gr);
+                                      obd->obd_name, (int)oa->o_seq);
                                GOTO(cleanup, rc = PTR_ERR(olg));
                         }
                         fcc = &oa->o_lcookie;
@@ -4074,7 +4053,7 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
                 GOTO(cleanup, rc = -ENOENT);
         }
 
-        rc = filter_prepare_destroy(obd, oa->o_id, oa->o_gr, &lockh);
+        rc = filter_prepare_destroy(obd, oa->o_id, oa->o_seq, &lockh);
         if (rc)
                 GOTO(cleanup, rc);
 
@@ -4132,7 +4111,7 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
          * here, and not while truncating above.  That avoids holding the
          * parent lock for a long time during truncate, which can block other
          * threads from doing anything to objects in that directory. bug 7171 */
-        dparent = filter_parent_lock(obd, oa->o_gr, oa->o_id);
+        dparent = filter_parent_lock(obd, oa->o_seq, oa->o_id);
         if (IS_ERR(dparent))
                 GOTO(cleanup, rc = PTR_ERR(dparent));
         cleanup_phase = 3; /* filter_parent_unlock */
@@ -4146,12 +4125,12 @@ int filter_destroy(struct obd_export *exp, struct obdo *oa,
         cleanup_phase = 4; /* fsfilt_commit */
 
         /* Quota release need uid/gid of inode */
-        obdo_from_inode(oa, dchild->d_inode, OBD_MD_FLUID|OBD_MD_FLGID);
+        obdo_from_inode(oa, dchild->d_inode, NULL, OBD_MD_FLUID|OBD_MD_FLGID);
 
-        filter_fmd_drop(exp, oa->o_id, oa->o_gr);
+        filter_fmd_drop(exp, oa->o_id, oa->o_seq);
 
         /* this drops dchild->d_inode->i_mutex unconditionally */
-        rc = filter_destroy_internal(obd, oa->o_id, oa->o_gr, dparent, dchild);
+        rc = filter_destroy_internal(obd, oa->o_id, oa->o_seq, dparent, dchild);
 
         EXIT;
 cleanup:
@@ -4221,8 +4200,8 @@ static int filter_truncate(struct obd_export *exp, struct obd_info *oinfo,
         }
 
         CDEBUG(D_INODE, "calling truncate for object "LPU64", valid = "LPX64
-               ", o_size = "LPD64"\n", oinfo->oi_oa->o_id,
-               oinfo->oi_oa->o_valid, oinfo->oi_policy.l_extent.start);
+               ", o_size = "LPD64"\n", oinfo->oi_oa->o_id,oinfo->oi_oa->o_valid,
+                oinfo->oi_policy.l_extent.start);
 
         oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
         oinfo->oi_oa->o_valid |= OBD_FL_TRUNC;
@@ -4236,28 +4215,27 @@ static int filter_sync(struct obd_export *exp, struct obdo *oa,
                        void *capa)
 {
         struct lvfs_run_ctxt saved;
-        struct filter_obd *filter;
+        struct obd_device_target *obt;
         struct dentry *dentry;
         int rc, rc2;
         ENTRY;
 
-        LASSERT(oa->o_valid & OBD_MD_FLGROUP);
-        rc = filter_auth_capa(exp, NULL, oa->o_gr,
+        rc = filter_auth_capa(exp, NULL, oa->o_seq,
                               (struct lustre_capa *)capa, CAPA_OPC_OSS_WRITE);
         if (rc)
                 RETURN(rc);
 
-        filter = &exp->exp_obd->u.filter;
+        obt = &exp->exp_obd->u.obt;
 
         /* An objid of zero is taken to mean "sync whole filesystem" */
         if (!oa || !(oa->o_valid & OBD_MD_FLID)) {
-                rc = fsfilt_sync(exp->exp_obd, filter->fo_obt.obt_sb);
+                rc = fsfilt_sync(exp->exp_obd, obt->obt_sb);
                 /* Flush any remaining cancel messages out to the target */
                 filter_sync_llogs(exp->exp_obd, exp);
                 RETURN(rc);
         }
 
-        dentry = filter_oa2dentry(exp->exp_obd, oa);
+        dentry = filter_oa2dentry(exp->exp_obd, &oa->o_oi);
         if (IS_ERR(dentry))
                 RETURN(PTR_ERR(dentry));
 
@@ -4268,7 +4246,7 @@ static int filter_sync(struct obd_export *exp, struct obdo *oa,
         rc = filemap_fdatawrite(dentry->d_inode->i_mapping);
         if (rc == 0) {
                 /* just any file to grab fsync method - "file" arg unused */
-                struct file *file = filter->fo_rcvd_filp;
+                struct file *file = obt->obt_rcvd_filp;
 
                 if (file->f_op && file->f_op->fsync)
                         rc = file->f_op->fsync(NULL, dentry, 1);
@@ -4280,7 +4258,7 @@ static int filter_sync(struct obd_export *exp, struct obdo *oa,
         UNLOCK_INODE_MUTEX(dentry->d_inode);
 
         oa->o_valid = OBD_MD_FLID;
-        obdo_from_inode(oa, dentry->d_inode, FILTER_VALID_FLAGS);
+        obdo_from_inode(oa, dentry->d_inode, NULL, FILTER_VALID_FLAGS);
 
         pop_ctxt(&saved, &exp->exp_obd->obd_lvfs_ctxt, NULL);
 
@@ -4349,8 +4327,8 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                         RETURN(0);
                 }
 
-                dentry = __filter_oa2dentry(exp->exp_obd, &fm_key->oa,
-                                            __FUNCTION__, 1);
+                dentry = __filter_oa2dentry(exp->exp_obd, &fm_key->oa.o_oi,
+                                            __func__, 1);
                 if (IS_ERR(dentry))
                         RETURN(PTR_ERR(dentry));
 
@@ -4364,6 +4342,12 @@ static int filter_get_info(struct obd_export *exp, __u32 keylen,
                 RETURN(rc);
         }
 
+        if (KEY_IS(KEY_SYNC_LOCK_CANCEL)) {
+                *((__u32 *) val) = obd->u.filter.fo_sync_lock_cancel;
+                *vallen = sizeof(__u32);
+                RETURN(0);
+        }
+
         CDEBUG(D_IOCTL, "invalid key\n");
         RETURN(-EINVAL);
 }
@@ -4424,14 +4408,14 @@ static int filter_set_mds_conn(struct obd_export *exp, void *val)
         else
                 group = 0; /* default value */
 
-        LASSERT_MDS_GROUP(group);
+        LASSERT_SEQ_IS_MDT(group);
         rc = filter_setup_llog_group(exp, obd, group);
         if (rc)
                 goto out;
 
-        if (group == FILTER_GROUP_MDS0) {
+        if (group == FID_SEQ_OST_MDT0) {
                 /* setup llog group 1 for interop */
-                filter_setup_llog_group(exp, obd, FILTER_GROUP_LLOG);
+                filter_setup_llog_group(exp, obd, FID_SEQ_LLOG);
         }
 
         lquota_setinfo(filter_quota_interface_ref, obd, exp);
@@ -4641,8 +4625,8 @@ static int __init obdfilter_init(void)
         int rc, i;
 
         /** sanity check for group<->mdsno conversion */
-        for (i = 0; i < 32; i++)
-                 LASSERT(objgrp_to_mdsno(mdt_to_obd_objgrp(i)) == i);
+        for (i = 0; i < MAX_MDT_COUNT; i++)
+                 LASSERT(objseq_to_mdsno(mdt_to_obd_objseq(i)) == i);
 
         lprocfs_filter_init_vars(&lvars);