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LU-10143 osd-zfs: allocate sequence in advance
[fs/lustre-release.git] / lustre / osd-zfs / osd_handler.c
index e8a89a0..c7d890b 100644 (file)
@@ -23,7 +23,7 @@
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2012, 2016, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -39,7 +39,6 @@
 
 #define DEBUG_SUBSYSTEM S_OSD
 
-#include <lustre_ver.h>
 #include <libcfs/libcfs.h>
 #include <obd_support.h>
 #include <lustre_net.h>
@@ -47,7 +46,7 @@
 #include <obd_class.h>
 #include <lustre_disk.h>
 #include <lustre_fid.h>
-#include <lustre_param.h>
+#include <uapi/linux/lustre/lustre_param.h>
 #include <md_object.h>
 
 #include "osd_internal.h"
@@ -67,6 +66,8 @@
 
 struct lu_context_key  osd_key;
 
+static int osd_txg_sync_delay_us = -1;
+
 /* Slab for OSD object allocation */
 struct kmem_cache *osd_object_kmem;
 
@@ -96,6 +97,8 @@ static void arc_prune_func(int64_t bytes, void *private)
        struct lu_env      env;
        int rc;
 
+       LASSERT(site->ls_obj_hash);
+
        rc = lu_env_init(&env, LCT_SHRINKER);
        if (rc) {
                CERROR("%s: can't initialize shrinker env: rc = %d\n",
@@ -161,12 +164,12 @@ static void osd_trans_commit_cb(void *cb_data, int error)
         * should be released. Quota space won't be adjusted at this point since
         * we can't provide a suitable environment. It will be performed
         * asynchronously by a lquota thread. */
-       qsd_op_end(NULL, osd->od_quota_slave, &oh->ot_quota_trans);
+       qsd_op_end(NULL, osd->od_quota_slave_dt, &oh->ot_quota_trans);
+       if (osd->od_quota_slave_md != NULL)
+               qsd_op_end(NULL, osd->od_quota_slave_md, &oh->ot_quota_trans);
 
        lu_device_put(lud);
        th->th_dev = NULL;
-       lu_context_exit(&th->th_ctx);
-       lu_context_fini(&th->th_ctx);
        OBD_FREE_PTR(oh);
 
        EXIT;
@@ -193,8 +196,10 @@ static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                           struct thandle *th)
 {
-       struct osd_thandle      *oh;
-       int                     rc;
+       struct osd_device *osd = osd_dt_dev(d);
+       struct osd_thandle *oh;
+       int rc;
+
        ENTRY;
 
        oh = container_of0(th, struct osd_thandle, ot_super);
@@ -202,17 +207,19 @@ static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
        LASSERT(oh->ot_tx);
 
        rc = dt_txn_hook_start(env, d, th);
-       if (rc != 0)
+       if (rc != 0) {
+               CERROR("%s: dt_txn_hook_start failed: rc = %d\n",
+                       osd->od_svname, rc);
                RETURN(rc);
+       }
 
-       if (oh->ot_write_commit && OBD_FAIL_CHECK(OBD_FAIL_OST_MAPBLK_ENOSPC))
+       if (OBD_FAIL_CHECK(OBD_FAIL_OSD_TXN_START))
                /* Unlike ldiskfs, ZFS checks for available space and returns
                 * -ENOSPC when assigning txg */
-               RETURN(-ENOSPC);
+               RETURN(-EIO);
 
        rc = -dmu_tx_assign(oh->ot_tx, TXG_WAIT);
        if (unlikely(rc != 0)) {
-               struct osd_device *osd = osd_dt_dev(d);
                /* dmu will call commit callback with error code during abort */
                if (!lu_device_is_md(&d->dd_lu_dev) && rc == -ENOSPC)
                        CERROR("%s: failed to start transaction due to ENOSPC"
@@ -224,17 +231,15 @@ static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                /* add commit callback */
                dmu_tx_callback_register(oh->ot_tx, osd_trans_commit_cb, oh);
                oh->ot_assigned = 1;
-               lu_context_init(&th->th_ctx, th->th_tags);
-               lu_context_enter(&th->th_ctx);
+               osd_oti_get(env)->oti_in_trans = 1;
                lu_device_get(&d->dd_lu_dev);
        }
 
        RETURN(rc);
 }
 
-static int osd_unlinked_object_free(struct osd_device *osd, uint64_t oid);
-
-static void osd_unlinked_list_emptify(struct osd_device *osd,
+static void osd_unlinked_list_emptify(const struct lu_env *env,
+                                     struct osd_device *osd,
                                      struct list_head *list, bool free)
 {
        struct osd_object *obj;
@@ -248,7 +253,7 @@ static void osd_unlinked_list_emptify(struct osd_device *osd,
 
                list_del_init(&obj->oo_unlinked_linkage);
                if (free)
-                       (void)osd_unlinked_object_free(osd, oid);
+                       (void)osd_unlinked_object_free(env, osd, oid);
        }
 }
 
@@ -285,17 +290,25 @@ static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
        oh = container_of0(th, struct osd_thandle, ot_super);
        INIT_LIST_HEAD(&unlinked);
        list_splice_init(&oh->ot_unlinked_list, &unlinked);
+
+       osd_oti_get(env)->oti_ins_cache_depth--;
        /* reset OI cache for safety */
-       osd_oti_get(env)->oti_ins_cache_used = 0;
+       if (osd_oti_get(env)->oti_ins_cache_depth == 0)
+               osd_oti_get(env)->oti_ins_cache_used = 0;
 
        if (oh->ot_assigned == 0) {
                LASSERT(oh->ot_tx);
+               CDEBUG(D_OTHER, "%s: transaction is aborted\n", osd->od_svname);
+               osd_trans_stop_cb(oh, th->th_result);
                dmu_tx_abort(oh->ot_tx);
-               osd_object_sa_dirty_rele(oh);
-               osd_unlinked_list_emptify(osd, &unlinked, false);
+               osd_object_sa_dirty_rele(env, oh);
+               osd_unlinked_list_emptify(env, osd, &unlinked, false);
                /* there won't be any commit, release reserved quota space now,
                 * if any */
-               qsd_op_end(env, osd->od_quota_slave, &oh->ot_quota_trans);
+               qsd_op_end(env, osd->od_quota_slave_dt, &oh->ot_quota_trans);
+               if (osd->od_quota_slave_md != NULL)
+                       qsd_op_end(env, osd->od_quota_slave_md,
+                                  &oh->ot_quota_trans);
                OBD_FREE_PTR(oh);
                RETURN(0);
        }
@@ -310,15 +323,20 @@ static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
        LASSERT(oh->ot_tx);
        txg = oh->ot_tx->tx_txg;
 
-       osd_object_sa_dirty_rele(oh);
+       osd_object_sa_dirty_rele(env, oh);
        /* XXX: Once dmu_tx_commit() called, oh/th could have been freed
         * by osd_trans_commit_cb already. */
        dmu_tx_commit(oh->ot_tx);
+       osd_oti_get(env)->oti_in_trans = 0;
 
-       osd_unlinked_list_emptify(osd, &unlinked, true);
+       osd_unlinked_list_emptify(env, osd, &unlinked, true);
 
-       if (sync)
-               txg_wait_synced(dmu_objset_pool(osd->od_os), txg);
+       if (sync) {
+               if (osd_txg_sync_delay_us < 0)
+                       txg_wait_synced(dmu_objset_pool(osd->od_os), txg);
+               else
+                       udelay(osd_txg_sync_delay_us);
+       }
 
        RETURN(rc);
 }
@@ -356,12 +374,13 @@ static struct thandle *osd_trans_create(const struct lu_env *env,
        INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
        INIT_LIST_HEAD(&oh->ot_unlinked_list);
        INIT_LIST_HEAD(&oh->ot_sa_list);
-       sema_init(&oh->ot_sa_lock, 1);
        memset(&oh->ot_quota_trans, 0, sizeof(oh->ot_quota_trans));
        th = &oh->ot_super;
        th->th_dev = dt;
        th->th_result = 0;
-       th->th_tags = LCT_TX_HANDLE;
+
+       osd_oti_get(env)->oti_ins_cache_depth++;
+
        RETURN(th);
 }
 
@@ -612,6 +631,14 @@ static void osd_conf_get(const struct lu_env *env,
        param->ddp_max_extent_blks =
                (1 << (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT));
        param->ddp_extent_tax = osd_blk_insert_cost(osd);
+
+       /* Preferred RPC size for efficient disk IO.  1MB shows good
+        * all-around performance for ZFS, but use blocksize (recordsize)
+        * by default if larger to avoid read-modify-write. */
+       if (osd->od_max_blksz > ONE_MB_BRW_SIZE)
+               param->ddp_brw_size = osd->od_max_blksz;
+       else
+               param->ddp_brw_size = ONE_MB_BRW_SIZE;
 }
 
 /*
@@ -715,6 +742,7 @@ static void osd_key_fini(const struct lu_context *ctx,
                info->oti_ins_cache = NULL;
                info->oti_ins_cache_size = 0;
        }
+       lu_buf_free(&info->oti_xattr_lbuf);
        OBD_FREE_PTR(info);
 }
 
@@ -745,14 +773,21 @@ static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
        ENTRY;
 
        /* shutdown quota slave instance associated with the device */
-       if (o->od_quota_slave != NULL) {
+       if (o->od_quota_slave_md != NULL) {
                /* complete all in-flight callbacks */
                osd_sync(env, &o->od_dt_dev);
                txg_wait_callbacks(spa_get_dsl(dmu_objset_spa(o->od_os)));
-               qsd_fini(env, o->od_quota_slave);
-               o->od_quota_slave = NULL;
+               qsd_fini(env, o->od_quota_slave_md);
+               o->od_quota_slave_md = NULL;
        }
 
+       if (o->od_quota_slave_dt != NULL) {
+               /* complete all in-flight callbacks */
+               osd_sync(env, &o->od_dt_dev);
+               txg_wait_callbacks(spa_get_dsl(dmu_objset_spa(o->od_os)));
+               qsd_fini(env, o->od_quota_slave_dt);
+               o->od_quota_slave_dt = NULL;
+       }
        osd_fid_fini(env, o);
 
        RETURN(0);
@@ -783,6 +818,14 @@ static void osd_readonly_changed_cb(void *arg, uint64_t newval)
        osd->od_prop_rdonly = !!newval;
 }
 
+#ifdef HAVE_DMU_OBJECT_ALLOC_DNSIZE
+static void osd_dnodesize_changed_cb(void *arg, uint64_t newval)
+{
+       struct osd_device *osd = arg;
+
+       osd->od_dnsize = newval;
+}
+#endif
 /*
  * This function unregisters all registered callbacks.  It's harmless to
  * unregister callbacks that were never registered so it is used to safely
@@ -798,6 +841,10 @@ static void osd_objset_unregister_callbacks(struct osd_device *o)
                                   osd_recordsize_changed_cb, o);
        (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_READONLY),
                                   osd_readonly_changed_cb, o);
+#ifdef HAVE_DMU_OBJECT_ALLOC_DNSIZE
+       (void) dsl_prop_unregister(ds, zfs_prop_to_name(ZFS_PROP_DNODESIZE),
+                                  osd_dnodesize_changed_cb, o);
+#endif
 
        if (o->arc_prune_cb != NULL) {
                arc_remove_prune_callback(o->arc_prune_cb);
@@ -834,6 +881,13 @@ static int osd_objset_register_callbacks(struct osd_device *o)
        if (rc)
                GOTO(err, rc);
 
+#ifdef HAVE_DMU_OBJECT_ALLOC_DNSIZE
+       rc = -dsl_prop_register(ds, zfs_prop_to_name(ZFS_PROP_DNODESIZE),
+                               osd_dnodesize_changed_cb, o);
+       if (rc)
+               GOTO(err, rc);
+#endif
+
        o->arc_prune_cb = arc_add_prune_callback(arc_prune_func, o);
 err:
        dsl_pool_config_exit(dp, FTAG);
@@ -846,13 +900,14 @@ err:
 static int osd_objset_open(struct osd_device *o)
 {
        uint64_t        version = ZPL_VERSION;
-       uint64_t        sa_obj;
+       uint64_t        sa_obj, unlink_obj;
        int             rc;
        ENTRY;
 
-       rc = -dmu_objset_own(o->od_mntdev, DMU_OST_ZFS,
+       rc = -osd_dmu_objset_own(o->od_mntdev, DMU_OST_ZFS,
                             o->od_dt_dev.dd_rdonly ? B_TRUE : B_FALSE,
-                            o, &o->od_os);
+                            B_FALSE, o, &o->od_os);
+
        if (rc) {
                CERROR("%s: can't open %s\n", o->od_svname, o->od_mntdev);
                o->od_os = NULL;
@@ -891,7 +946,7 @@ static int osd_objset_open(struct osd_device *o)
        }
 
        rc = -zap_lookup(o->od_os, MASTER_NODE_OBJ, ZFS_UNLINKED_SET,
-                        8, 1, &o->od_unlinkedid);
+                        8, 1, &unlink_obj);
        if (rc) {
                CERROR("%s: lookup for %s failed: rc = %d\n",
                       o->od_svname, ZFS_UNLINKED_SET, rc);
@@ -907,18 +962,26 @@ static int osd_objset_open(struct osd_device *o)
                GOTO(out, rc = -ENOTSUPP);
        }
 
+       rc = __osd_obj2dnode(o->od_os, unlink_obj, &o->od_unlinked);
+       if (rc) {
+               CERROR("%s: can't get dnode for unlinked: rc = %d\n",
+                      o->od_svname, rc);
+               GOTO(out, rc);
+       }
+
 out:
        if (rc != 0 && o->od_os != NULL) {
-               dmu_objset_disown(o->od_os, o);
+               osd_dmu_objset_disown(o->od_os, B_FALSE, o);
                o->od_os = NULL;
        }
 
        RETURN(rc);
 }
 
-static int
-osd_unlinked_object_free(struct osd_device *osd, uint64_t oid)
+int osd_unlinked_object_free(const struct lu_env *env, struct osd_device *osd,
+                        uint64_t oid)
 {
+       char *key = osd_oti_get(env)->oti_str;
        int       rc;
        dmu_tx_t *tx;
 
@@ -938,8 +1001,10 @@ osd_unlinked_object_free(struct osd_device *osd, uint64_t oid)
        }
 
        tx = dmu_tx_create(osd->od_os);
+       dmu_tx_mark_netfree(tx);
        dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
-       dmu_tx_hold_zap(tx, osd->od_unlinkedid, FALSE, NULL);
+       osd_tx_hold_zap(tx, osd->od_unlinked->dn_object, osd->od_unlinked,
+                       FALSE, NULL);
        rc = -dmu_tx_assign(tx, TXG_WAIT);
        if (rc != 0) {
                CWARN("%s: Cannot assign tx for %llu: rc = %d\n",
@@ -947,7 +1012,9 @@ osd_unlinked_object_free(struct osd_device *osd, uint64_t oid)
                goto failed;
        }
 
-       rc = -zap_remove_int(osd->od_os, osd->od_unlinkedid, oid, tx);
+       snprintf(key, sizeof(osd_oti_get(env)->oti_str), "%llx", oid);
+       rc = osd_zap_remove(osd, osd->od_unlinked->dn_object,
+                           osd->od_unlinked, key, tx);
        if (rc != 0) {
                CWARN("%s: Cannot remove %llu from unlinked set: rc = %d\n",
                      osd->od_svname, oid, rc);
@@ -977,13 +1044,13 @@ osd_unlinked_drain(const struct lu_env *env, struct osd_device *osd)
        zap_cursor_t     zc;
        zap_attribute_t *za = &osd_oti_get(env)->oti_za;
 
-       zap_cursor_init(&zc, osd->od_os, osd->od_unlinkedid);
+       zap_cursor_init(&zc, osd->od_os, osd->od_unlinked->dn_object);
 
        while (zap_cursor_retrieve(&zc, za) == 0) {
                /* If cannot free the object, leave it in the unlinked set,
                 * until the OSD is mounted again when obd_unlinked_drain()
                 * will be called. */
-               if (osd_unlinked_object_free(osd, za->za_first_integer) != 0)
+               if (osd_unlinked_object_free(env, osd, za->za_first_integer))
                        break;
                zap_cursor_advance(&zc);
        }
@@ -1016,6 +1083,9 @@ static int osd_mount(const struct lu_env *env,
        if (rc >= sizeof(o->od_svname))
                RETURN(-E2BIG);
 
+       o->od_index_backup_stop = 0;
+       o->od_index = -1; /* -1 means index is invalid */
+       rc = server_name2index(o->od_svname, &o->od_index, NULL);
        str = strstr(str, ":");
        if (str) {
                unsigned long flags;
@@ -1029,6 +1099,9 @@ static int osd_mount(const struct lu_env *env,
                        LCONSOLE_WARN("%s: set dev_rdonly on this device\n",
                                      svname);
                }
+
+               if (flags & LMD_FLG_NOSCRUB)
+                       o->od_auto_scrub_interval = AS_NEVER;
        }
 
        if (server_name_is_ost(o->od_svname))
@@ -1040,23 +1113,33 @@ static int osd_mount(const struct lu_env *env,
 
        o->od_xattr_in_sa = B_TRUE;
        o->od_max_blksz = osd_spa_maxblocksize(o->od_os->os_spa);
+       o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
 
-       rc = osd_objset_register_callbacks(o);
+       rc = __osd_obj2dnode(o->od_os, o->od_rootid, &rootdn);
        if (rc)
                GOTO(err, rc);
+       o->od_root = rootdn->dn_object;
+       osd_dnode_rele(rootdn);
 
-       rc = __osd_obj2dnode(env, o->od_os, o->od_rootid, &rootdn);
+       rc = __osd_obj2dnode(o->od_os, DMU_USERUSED_OBJECT,
+                            &o->od_userused_dn);
        if (rc)
                GOTO(err, rc);
 
-       o->od_root = rootdn->dn_object;
-       osd_dnode_rele(rootdn);
-
-       /* 1. initialize oi before any file create or file open */
-       rc = osd_oi_init(env, o);
+       rc = __osd_obj2dnode(o->od_os, DMU_GROUPUSED_OBJECT,
+                            &o->od_groupused_dn);
        if (rc)
                GOTO(err, rc);
 
+#ifdef ZFS_PROJINHERIT
+       if (dmu_objset_projectquota_enabled(o->od_os)) {
+               rc = __osd_obj2dnode(o->od_os, DMU_PROJECTUSED_OBJECT,
+                                    &o->od_projectused_dn);
+               if (rc && rc != -ENOENT)
+                       GOTO(err, rc);
+       }
+#endif
+
        rc = lu_site_init(&o->od_site, osd2lu_dev(o));
        if (rc)
                GOTO(err, rc);
@@ -1066,19 +1149,53 @@ static int osd_mount(const struct lu_env *env,
        if (rc)
                GOTO(err, rc);
 
+       rc = osd_objset_register_callbacks(o);
+       if (rc)
+               GOTO(err, rc);
+
+       o->od_in_init = 1;
+       rc = osd_scrub_setup(env, o);
+       o->od_in_init = 0;
+       if (rc)
+               GOTO(err, rc);
+
        rc = osd_procfs_init(o, o->od_svname);
        if (rc)
                GOTO(err, rc);
 
-       /* initialize quota slave instance */
-       o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
-                                    o->od_proc_entry);
-       if (IS_ERR(o->od_quota_slave)) {
-               rc = PTR_ERR(o->od_quota_slave);
-               o->od_quota_slave = NULL;
+       /* currently it's no need to prepare qsd_instance_md for OST */
+       if (!o->od_is_ost) {
+               o->od_quota_slave_md = qsd_init(env, o->od_svname,
+                                               &o->od_dt_dev,
+                                               o->od_proc_entry, true);
+               if (IS_ERR(o->od_quota_slave_md)) {
+                       rc = PTR_ERR(o->od_quota_slave_md);
+                       o->od_quota_slave_md = NULL;
+                       GOTO(err, rc);
+               }
+       }
+
+       o->od_quota_slave_dt = qsd_init(env, o->od_svname, &o->od_dt_dev,
+                                    o->od_proc_entry, false);
+
+       if (IS_ERR(o->od_quota_slave_dt)) {
+               if (o->od_quota_slave_md != NULL) {
+                       qsd_fini(env, o->od_quota_slave_md);
+                       o->od_quota_slave_md = NULL;
+               }
+
+               rc = PTR_ERR(o->od_quota_slave_dt);
+               o->od_quota_slave_dt = NULL;
                GOTO(err, rc);
        }
 
+#ifdef HAVE_DMU_USEROBJ_ACCOUNTING
+       if (!osd_dmu_userobj_accounting_available(o))
+               CWARN("%s: dnode accounting not enabled: "
+                     "enable feature@userobj_accounting in pool\n",
+                     o->od_mntdev);
+#endif
+
        /* parse mount option "noacl", and enable ACL by default */
        opts = lustre_cfg_string(cfg, 3);
        if (opts == NULL || strstr(opts, "noacl") == NULL)
@@ -1087,7 +1204,7 @@ static int osd_mount(const struct lu_env *env,
        osd_unlinked_drain(env, o);
 err:
        if (rc && o->od_os) {
-               dmu_objset_disown(o->od_os, o);
+               osd_dmu_objset_disown(o->od_os, B_FALSE, o);
                o->od_os = NULL;
        }
 
@@ -1108,14 +1225,33 @@ static void osd_umount(const struct lu_env *env, struct osd_device *o)
                CERROR("%s: lost %d pinned dbuf(s)\n", o->od_svname,
                       atomic_read(&o->od_zerocopy_pin));
 
+       if (o->od_unlinked) {
+               osd_dnode_rele(o->od_unlinked);
+               o->od_unlinked = NULL;
+       }
+       if (o->od_userused_dn) {
+               osd_dnode_rele(o->od_userused_dn);
+               o->od_userused_dn = NULL;
+       }
+       if (o->od_groupused_dn) {
+               osd_dnode_rele(o->od_groupused_dn);
+               o->od_groupused_dn = NULL;
+       }
+
+#ifdef ZFS_PROJINHERIT
+       if (o->od_projectused_dn) {
+               osd_dnode_rele(o->od_projectused_dn);
+               o->od_projectused_dn = NULL;
+       }
+#endif
+
        if (o->od_os != NULL) {
                if (!o->od_dt_dev.dd_rdonly)
                        /* force a txg sync to get all commit callbacks */
                        txg_wait_synced(dmu_objset_pool(o->od_os), 0ULL);
 
                /* close the object set */
-               dmu_objset_disown(o->od_os, o);
-
+               osd_dmu_objset_disown(o->od_os, B_FALSE, o);
                o->od_os = NULL;
        }
 
@@ -1136,6 +1272,9 @@ static int osd_device_init0(const struct lu_env *env,
 
        l->ld_ops = &osd_lu_ops;
        o->od_dt_dev.dd_ops = &osd_dt_ops;
+       sema_init(&o->od_otable_sem, 1);
+       INIT_LIST_HEAD(&o->od_ios_list);
+       o->od_auto_scrub_interval = AS_DEFAULT;
 
 out:
        RETURN(rc);
@@ -1160,6 +1299,10 @@ static struct lu_device *osd_device_alloc(const struct lu_env *env,
        INIT_LIST_HEAD(&osl->osl_seq_list);
        rwlock_init(&osl->osl_seq_list_lock);
        sema_init(&osl->osl_seq_init_sem, 1);
+       INIT_LIST_HEAD(&dev->od_index_backup_list);
+       INIT_LIST_HEAD(&dev->od_index_restore_list);
+       spin_lock_init(&dev->od_lock);
+       dev->od_index_backup_policy = LIBP_NONE;
 
        rc = dt_device_init(&dev->od_dt_dev, type);
        if (rc == 0) {
@@ -1218,7 +1361,7 @@ static struct lu_device *osd_device_fini(const struct lu_env *env,
 
        /* now with all the callbacks completed we can cleanup the remainings */
        osd_shutdown(env, o);
-       osd_oi_fini(env, o);
+       osd_scrub_cleanup(env, o);
 
        rc = osd_procfs_fini(o);
        if (rc) {
@@ -1254,18 +1397,30 @@ static int osd_process_config(const struct lu_env *env,
                rc = osd_mount(env, o, cfg);
                break;
        case LCFG_CLEANUP:
+               /* For the case LCFG_PRE_CLEANUP is not called in advance,
+                * that may happend if hit failure during mount process. */
+               osd_index_backup(env, o, false);
                rc = osd_shutdown(env, o);
                break;
        case LCFG_PARAM: {
                LASSERT(&o->od_dt_dev);
                rc = class_process_proc_param(PARAM_OSD, lprocfs_osd_obd_vars,
                                              cfg, &o->od_dt_dev);
-               if (rc > 0 || rc == -ENOSYS)
+               if (rc > 0 || rc == -ENOSYS) {
                        rc = class_process_proc_param(PARAM_OST,
                                                      lprocfs_osd_obd_vars,
                                                      cfg, &o->od_dt_dev);
+                       if (rc > 0)
+                               rc = 0;
+               }
                break;
        }
+       case LCFG_PRE_CLEANUP:
+               osd_scrub_stop(o);
+               osd_index_backup(env, o,
+                                o->od_index_backup_policy != LIBP_NONE);
+               rc = 0;
+               break;
        default:
                rc = -ENOTTY;
        }
@@ -1279,12 +1434,14 @@ static int osd_recovery_complete(const struct lu_env *env, struct lu_device *d)
        int                      rc = 0;
        ENTRY;
 
-       if (osd->od_quota_slave == NULL)
+       if (osd->od_quota_slave_md == NULL && osd->od_quota_slave_dt == NULL)
                RETURN(0);
 
        /* start qsd instance on recovery completion, this notifies the quota
         * slave code that we are about to process new requests now */
-       rc = qsd_start(env, osd->od_quota_slave);
+       rc = qsd_start(env, osd->od_quota_slave_dt);
+       if (rc == 0 && osd->od_quota_slave_md != NULL)
+               rc = qsd_start(env, osd->od_quota_slave_md);
        RETURN(rc);
 }
 
@@ -1364,6 +1521,16 @@ static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
                osd->od_cl_seq = NULL;
        }
 
+       if (ss->ss_node_id == 0) {
+               /*
+                * If the OSD on the sequence controller(MDT0), then allocate
+                * sequence here, otherwise allocate sequence after connected
+                * to MDT0 (see mdt_register_lwp_callback()).
+                */
+               rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
+                                  &osd->od_cl_seq->lcs_space, env);
+       }
+
        RETURN(rc);
 }
 
@@ -1374,9 +1541,16 @@ static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
        int                      rc = 0;
        ENTRY;
 
-       if (osd->od_quota_slave != NULL) {
+       if (osd->od_quota_slave_md != NULL) {
                /* set up quota slave objects */
-               rc = qsd_prepare(env, osd->od_quota_slave);
+               rc = qsd_prepare(env, osd->od_quota_slave_md);
+               if (rc != 0)
+                       RETURN(rc);
+       }
+
+       if (osd->od_quota_slave_dt != NULL) {
+               /* set up quota slave objects */
+               rc = qsd_prepare(env, osd->od_quota_slave_dt);
                if (rc != 0)
                        RETURN(rc);
        }
@@ -1463,10 +1637,13 @@ static void __exit osd_exit(void)
        lu_kmem_fini(osd_caches);
 }
 
-extern unsigned int osd_oi_count;
 module_param(osd_oi_count, int, 0444);
 MODULE_PARM_DESC(osd_oi_count, "Number of Object Index containers to be created, it's only valid for new filesystem.");
 
+module_param(osd_txg_sync_delay_us, int, 0644);
+MODULE_PARM_DESC(osd_txg_sync_delay_us,
+                "When zero or larger delay N usec instead of doing TXG sync");
+
 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_ZFS_NAME")");
 MODULE_VERSION(LUSTRE_VERSION_STRING);