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LU-9184 grants: move grant code to the target
[fs/lustre-release.git] / lustre / ofd / ofd_obd.c
index cb7a2e9..cd9f673 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, 2014 Intel Corporation.
+ * Copyright (c) 2012, 2016, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -122,6 +122,10 @@ out:
  * connect flags from the obd_connect_data::ocd_connect_flags field of the
  * reply. \see tgt_connect().
  *
+ * Before 2.7.50 clients will send a struct obd_connect_data_v1 rather than a
+ * full struct obd_connect_data. So care must be taken when accessing fields
+ * that are not present in struct obd_connect_data_v1. See LU-16.
+ *
  * \param[in] env              execution environment
  * \param[in] exp              the obd_export associated with this
  *                             client/target pair
@@ -145,7 +149,7 @@ static int ofd_parse_connect_data(const struct lu_env *env,
        if (!data)
                RETURN(0);
 
-       CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: "LPX64
+       CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: %#llx"
               " ocd_version: %x ocd_grant: %d ocd_index: %u"
               " ocd_group %u\n",
               exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
@@ -164,6 +168,10 @@ static int ofd_parse_connect_data(const struct lu_env *env,
        fed->fed_group = data->ocd_group;
 
        data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
+
+       if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2)
+               data->ocd_connect_flags2 &= OST_CONNECT_SUPPORTED2;
+
        data->ocd_version = LUSTRE_VERSION_CODE;
 
        /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
@@ -173,18 +181,46 @@ static int ofd_parse_connect_data(const struct lu_env *env,
        else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN)
                RETURN(-EPROTO);
 
-       if (ofd_grant_param_supp(exp)) {
-               exp->exp_filter_data.fed_pagesize = data->ocd_blocksize;
-               /* ocd_{blocksize,inodespace} are log2 values */
-               data->ocd_blocksize  = ofd->ofd_blockbits;
-               data->ocd_inodespace = ofd->ofd_dt_conf.ddp_inodespace;
-               /* ocd_grant_extent is in 1K blocks */
-               data->ocd_grant_extent = ofd->ofd_dt_conf.ddp_grant_frag >> 10;
+       /* Determine optimal brw size before calculating grant */
+       if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
+               data->ocd_brw_size = 65536;
+       } else if (OCD_HAS_FLAG(data, BRW_SIZE)) {
+               if (data->ocd_brw_size > ofd->ofd_brw_size)
+                       data->ocd_brw_size = ofd->ofd_brw_size;
+               if (data->ocd_brw_size == 0) {
+                       CERROR("%s: cli %s/%p ocd_connect_flags: %#llx"
+                              " ocd_version: %x ocd_grant: %d ocd_index: %u "
+                              "ocd_brw_size is unexpectedly zero, "
+                              "network data corruption?"
+                              "Refusing connection of this client\n",
+                              exp->exp_obd->obd_name,
+                              exp->exp_client_uuid.uuid,
+                              exp, data->ocd_connect_flags, data->ocd_version,
+                              data->ocd_grant, data->ocd_index);
+                       RETURN(-EPROTO);
+               }
+       }
+
+       if (OCD_HAS_FLAG(data, GRANT_PARAM)) {
+               struct dt_device_param *ddp = &ofd->ofd_lut.lut_dt_conf;
+
+               /* client is reporting its page size, for future use */
+               exp->exp_target_data.ted_pagebits = data->ocd_grant_blkbits;
+               data->ocd_grant_blkbits  = ofd->ofd_lut.lut_tgd.tgd_blockbits;
+               /* ddp_inodespace may not be power-of-two value, eg. for ldiskfs
+                * it's LDISKFS_DIR_REC_LEN(20) = 28. */
+               data->ocd_grant_inobits = fls(ddp->ddp_inodespace - 1);
+               /* ocd_grant_tax_kb is in 1K byte blocks */
+               data->ocd_grant_tax_kb = ddp->ddp_extent_tax >> 10;
+               data->ocd_grant_max_blks = ddp->ddp_max_extent_blks;
        }
 
-       if (data->ocd_connect_flags & OBD_CONNECT_GRANT)
-               data->ocd_grant = ofd_grant_connect(env, exp, data->ocd_grant,
-                                                   new_connection);
+       if (OCD_HAS_FLAG(data, GRANT)) {
+               /* Save connect_data we have so far because tgt_grant_connect()
+                * uses it to calculate grant. */
+               exp->exp_connect_data = *data;
+               tgt_grant_connect(env, exp, data, new_connection);
+       }
 
        if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
                struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
@@ -202,29 +238,11 @@ static int ofd_parse_connect_data(const struct lu_env *env,
                if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) {
                        /* this will only happen on the first connect */
                        lsd->lsd_feature_compat |= OBD_COMPAT_OST;
-                       /* sync is not needed here as lut_client_add will
+                       /* sync is not needed here as tgt_client_new will
                         * set exp_need_sync flag */
                        tgt_server_data_update(env, &ofd->ofd_lut, 0);
                }
        }
-       if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
-               data->ocd_brw_size = 65536;
-       } else if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE) {
-               data->ocd_brw_size = min(data->ocd_brw_size,
-                                        (__u32)DT_MAX_BRW_SIZE);
-               if (data->ocd_brw_size == 0) {
-                       CERROR("%s: cli %s/%p ocd_connect_flags: "LPX64
-                              " ocd_version: %x ocd_grant: %d ocd_index: %u "
-                              "ocd_brw_size is unexpectedly zero, "
-                              "network data corruption?"
-                              "Refusing connection of this client\n",
-                              exp->exp_obd->obd_name,
-                              exp->exp_client_uuid.uuid,
-                              exp, data->ocd_connect_flags, data->ocd_version,
-                              data->ocd_grant, data->ocd_index);
-                       RETURN(-EPROTO);
-               }
-       }
 
        if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) {
                __u32 cksum_types = data->ocd_cksum_types;
@@ -232,7 +250,7 @@ static int ofd_parse_connect_data(const struct lu_env *env,
                /* The client set in ocd_cksum_types the checksum types it
                 * supports. We have to mask off the algorithms that we don't
                 * support */
-               data->ocd_cksum_types &= cksum_types_supported_server();
+               data->ocd_cksum_types &= ofd->ofd_cksum_types_supported;
 
                if (unlikely(data->ocd_cksum_types == 0)) {
                        CERROR("%s: Connect with checksum support but no "
@@ -245,15 +263,15 @@ static int ofd_parse_connect_data(const struct lu_env *env,
                       "%x\n", exp->exp_obd->obd_name, obd_export_nid2str(exp),
                       cksum_types, data->ocd_cksum_types);
        } else {
-               /* This client does not support OBD_CONNECT_CKSUM
-                * fall back to CRC32 */
+               /* This client does not support OBD_CONNECT_CKSUM.
+                * Report failure to negotiate checksum at connect */
                CDEBUG(D_RPCTRACE, "%s: cli %s does not support "
-                      "OBD_CONNECT_CKSUM, CRC32 will be used\n",
+                      "OBD_CONNECT_CKSUM\n",
                       exp->exp_obd->obd_name, obd_export_nid2str(exp));
        }
 
        if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
-               data->ocd_maxbytes = ofd->ofd_dt_conf.ddp_maxbytes;
+               data->ocd_maxbytes = ofd->ofd_lut.lut_dt_conf.ddp_maxbytes;
 
        if (OCD_HAS_FLAG(data, PINGLESS)) {
                if (ptlrpc_pinger_suppress_pings()) {
@@ -297,13 +315,17 @@ static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
        if (exp == NULL || obd == NULL || cluuid == NULL)
                RETURN(-EINVAL);
 
+       rc = nodemap_add_member(*(lnet_nid_t *)client_nid, exp);
+       if (rc != 0 && rc != -EEXIST)
+               RETURN(rc);
+
        ofd = ofd_dev(obd->obd_lu_dev);
 
        rc = ofd_parse_connect_data(env, exp, data, false);
        if (rc == 0)
                ofd_export_stats_init(ofd, exp, client_nid);
-
-       nodemap_add_member(*(lnet_nid_t *)client_nid, exp);
+       else
+               nodemap_del_member(exp);
 
        RETURN(rc);
 }
@@ -333,7 +355,6 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
        struct ofd_device       *ofd;
        struct lustre_handle     conn = { 0 };
        int                      rc;
-       lnet_nid_t              *client_nid;
        ENTRY;
 
        if (_exp == NULL || obd == NULL || cluuid == NULL)
@@ -348,15 +369,19 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
        exp = class_conn2export(&conn);
        LASSERT(exp != NULL);
 
+       if (localdata != NULL) {
+               rc = nodemap_add_member(*(lnet_nid_t *)localdata, exp);
+               if (rc != 0 && rc != -EEXIST)
+                       GOTO(out, rc);
+       } else {
+               CDEBUG(D_HA, "%s: cannot find nodemap for client %s: "
+                      "nid is null\n", obd->obd_name, cluuid->uuid);
+       }
+
        rc = ofd_parse_connect_data(env, exp, data, true);
        if (rc)
                GOTO(out, rc);
 
-       if (localdata != NULL) {
-               client_nid = localdata;
-               nodemap_add_member(*client_nid, exp);
-       }
-
        if (obd->obd_replayable) {
                struct tg_export_data *ted = &exp->exp_target_data;
 
@@ -373,8 +398,8 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
 
 out:
        if (rc != 0) {
-               nodemap_del_member(exp);
                class_disconnect(exp);
+               nodemap_del_member(exp);
                *_exp = NULL;
        } else {
                *_exp = exp;
@@ -405,12 +430,11 @@ int ofd_obd_disconnect(struct obd_export *exp)
        class_export_get(exp);
 
        if (!(exp->exp_flags & OBD_OPT_FORCE))
-               ofd_grant_sanity_check(ofd_obd(ofd), __FUNCTION__);
+               tgt_grant_sanity_check(ofd_obd(ofd), __func__);
 
-       nodemap_del_member(exp);
        rc = server_disconnect_export(exp);
 
-       ofd_grant_discard(exp);
+       tgt_grant_discard(exp);
 
        /* Do not erase record for recoverable client. */
        if (exp->exp_obd->obd_replayable &&
@@ -423,6 +447,7 @@ int ofd_obd_disconnect(struct obd_export *exp)
                lu_env_fini(&env);
        }
 out:
+       nodemap_del_member(exp);
        class_export_put(exp);
        RETURN(rc);
 }
@@ -478,10 +503,10 @@ static int ofd_destroy_export(struct obd_export *exp)
 {
        struct ofd_device *ofd = ofd_exp(exp);
 
-       if (exp->exp_filter_data.fed_pending)
+       if (exp->exp_target_data.ted_pending)
                CERROR("%s: cli %s/%p has %lu pending on destroyed export"
                       "\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
-                      exp, exp->exp_filter_data.fed_pending);
+                      exp, exp->exp_target_data.ted_pending);
 
        target_destroy_export(exp);
 
@@ -498,16 +523,14 @@ static int ofd_destroy_export(struct obd_export *exp)
         * discard grants once we're sure no more
         * interaction with the client is possible
         */
-       ofd_grant_discard(exp);
+       tgt_grant_discard(exp);
        ofd_fmd_cleanup(exp);
 
-       if (exp_connect_flags(exp) & OBD_CONNECT_GRANT_SHRINK) {
-               if (ofd->ofd_tot_granted_clients > 0)
-                       ofd->ofd_tot_granted_clients --;
-       }
+       if (exp_connect_flags(exp) & OBD_CONNECT_GRANT)
+               ofd->ofd_lut.lut_tgd.tgd_tot_granted_clients--;
 
        if (!(exp->exp_flags & OBD_OPT_FORCE))
-               ofd_grant_sanity_check(exp->exp_obd, __FUNCTION__);
+               tgt_grant_sanity_check(exp->exp_obd, __func__);
 
        LASSERT(list_empty(&exp->exp_filter_data.fed_mod_list));
        return 0;
@@ -528,17 +551,20 @@ static int ofd_destroy_export(struct obd_export *exp)
 int ofd_postrecov(const struct lu_env *env, struct ofd_device *ofd)
 {
        struct lu_device *ldev = &ofd->ofd_dt_dev.dd_lu_dev;
-       struct lfsck_start_param lsp;
        int rc;
 
        CDEBUG(D_HA, "%s: recovery is over\n", ofd_name(ofd));
 
-       lsp.lsp_start = NULL;
-       lsp.lsp_index_valid = 0;
-       rc = lfsck_start(env, ofd->ofd_osd, &lsp);
-       if (rc != 0 && rc != -EALREADY)
-               CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
-                     ofd_name(ofd), rc);
+       if (!ofd->ofd_skip_lfsck && !ofd->ofd_osd->dd_rdonly) {
+               struct lfsck_start_param lsp;
+
+               lsp.lsp_start = NULL;
+               lsp.lsp_index_valid = 0;
+               rc = lfsck_start(env, ofd->ofd_osd, &lsp);
+               if (rc != 0 && rc != -EALREADY)
+                       CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
+                             ofd_name(ofd), rc);
+       }
 
        return ldev->ld_ops->ldo_recovery_complete(env, ldev);
 }
@@ -605,7 +631,7 @@ static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
        }
 
        if (KEY_IS(KEY_SPTLRPC_CONF)) {
-               rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp), 0);
+               rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp));
        } else {
                CERROR("%s: Unsupported key %s\n",
                       exp->exp_obd->obd_name, (char*)key);
@@ -668,105 +694,6 @@ static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
 }
 
 /**
- * Get file system statistics of OST server.
- *
- * Helper function for ofd_statfs(), also used by grant code.
- * Implements caching for statistics to avoid calling OSD device each time.
- *
- * \param[in]  env       execution environment
- * \param[in]  ofd       OFD device
- * \param[out] osfs      statistic data to return
- * \param[in]  max_age   maximum age for cached data
- * \param[in]  from_cache show that data was get from cache or not
- *
- * \retval             0 if successful
- * \retval             negative value on error
- */
-int ofd_statfs_internal(const struct lu_env *env, struct ofd_device *ofd,
-                        struct obd_statfs *osfs, __u64 max_age, int *from_cache)
-{
-       int rc = 0;
-       ENTRY;
-
-       spin_lock(&ofd->ofd_osfs_lock);
-       if (cfs_time_before_64(ofd->ofd_osfs_age, max_age) || max_age == 0) {
-               u64 unstable;
-
-               /* statfs data are too old, get up-to-date one.
-                * we must be cautious here since multiple threads might be
-                * willing to update statfs data concurrently and we must
-                * grant that cached statfs data are always consistent */
-
-               if (ofd->ofd_statfs_inflight == 0)
-                       /* clear inflight counter if no users, although it would
-                        * take a while to overflow this 64-bit counter ... */
-                       ofd->ofd_osfs_inflight = 0;
-               /* notify ofd_grant_commit() that we want to track writes
-                * completed as of now */
-               ofd->ofd_statfs_inflight++;
-               /* record value of inflight counter before running statfs to
-                * compute the diff once statfs is completed */
-               unstable = ofd->ofd_osfs_inflight;
-               spin_unlock(&ofd->ofd_osfs_lock);
-
-               /* statfs can sleep ... hopefully not for too long since we can
-                * call it fairly often as space fills up */
-               rc = dt_statfs(env, ofd->ofd_osd, osfs);
-               if (unlikely(rc))
-                       GOTO(out, rc);
-
-               spin_lock(&ofd->ofd_grant_lock);
-               spin_lock(&ofd->ofd_osfs_lock);
-               /* calculate how much space was written while we released the
-                * ofd_osfs_lock */
-               unstable = ofd->ofd_osfs_inflight - unstable;
-               ofd->ofd_osfs_unstable = 0;
-               if (unstable) {
-                       /* some writes completed while we were running statfs
-                        * w/o the ofd_osfs_lock. Those ones got added to
-                        * the cached statfs data that we are about to crunch.
-                        * Take them into account in the new statfs data */
-                       osfs->os_bavail -= min_t(u64, osfs->os_bavail,
-                                              unstable >> ofd->ofd_blockbits);
-                       /* However, we don't really know if those writes got
-                        * accounted in the statfs call, so tell
-                        * ofd_grant_space_left() there is some uncertainty
-                        * on the accounting of those writes.
-                        * The purpose is to prevent spurious error messages in
-                        * ofd_grant_space_left() since those writes might be
-                        * accounted twice. */
-                       ofd->ofd_osfs_unstable += unstable;
-               }
-               /* similarly, there is some uncertainty on write requests
-                * between prepare & commit */
-               ofd->ofd_osfs_unstable += ofd->ofd_tot_pending;
-               spin_unlock(&ofd->ofd_grant_lock);
-
-               /* finally udpate cached statfs data */
-               ofd->ofd_osfs = *osfs;
-               ofd->ofd_osfs_age = cfs_time_current_64();
-
-               ofd->ofd_statfs_inflight--; /* stop tracking */
-               if (ofd->ofd_statfs_inflight == 0)
-                       ofd->ofd_osfs_inflight = 0;
-               spin_unlock(&ofd->ofd_osfs_lock);
-
-               if (from_cache)
-                       *from_cache = 0;
-       } else {
-               /* use cached statfs data */
-               *osfs = ofd->ofd_osfs;
-               spin_unlock(&ofd->ofd_osfs_lock);
-               if (from_cache)
-                       *from_cache = 1;
-       }
-       GOTO(out, rc);
-
-out:
-       return rc;
-}
-
-/**
  * Implementation of obd_ops::o_statfs.
  *
  * This function returns information about a storage file system.
@@ -792,11 +719,12 @@ int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
 {
         struct obd_device      *obd = class_exp2obd(exp);
        struct ofd_device       *ofd = ofd_exp(exp);
+       struct tg_grants_data   *tgd = &ofd->ofd_lut.lut_tgd;
        int                      rc;
 
        ENTRY;
 
-       rc = ofd_statfs_internal(env, ofd, osfs, max_age, NULL);
+       rc = tgt_statfs_internal(env, &ofd->ofd_lut, osfs, max_age, NULL);
        if (unlikely(rc))
                GOTO(out, rc);
 
@@ -804,55 +732,64 @@ int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
         * might be under-reporting if clients haven't announced their
         * caches with brw recently */
 
-       CDEBUG(D_SUPER | D_CACHE, "blocks cached "LPU64" granted "LPU64
-              " pending "LPU64" free "LPU64" avail "LPU64"\n",
-              ofd->ofd_tot_dirty, ofd->ofd_tot_granted, ofd->ofd_tot_pending,
-              osfs->os_bfree << ofd->ofd_blockbits,
-              osfs->os_bavail << ofd->ofd_blockbits);
+       CDEBUG(D_SUPER | D_CACHE, "blocks cached %llu granted %llu"
+              " pending %llu free %llu avail %llu\n",
+              tgd->tgd_tot_dirty, tgd->tgd_tot_granted,
+              tgd->tgd_tot_pending,
+              osfs->os_bfree << tgd->tgd_blockbits,
+              osfs->os_bavail << tgd->tgd_blockbits);
 
        osfs->os_bavail -= min_t(u64, osfs->os_bavail,
-                                ((ofd->ofd_tot_dirty + ofd->ofd_tot_pending +
-                                  osfs->os_bsize - 1) >> ofd->ofd_blockbits));
+                                ((tgd->tgd_tot_dirty + tgd->tgd_tot_pending +
+                                  osfs->os_bsize - 1) >> tgd->tgd_blockbits));
 
        /* The QoS code on the MDS does not care about space reserved for
         * precreate, so take it out. */
        if (exp_connect_flags(exp) & OBD_CONNECT_MDS) {
-               struct filter_export_data *fed;
+               struct tg_export_data *ted;
 
-               fed = &obd->obd_self_export->exp_filter_data;
+               ted = &obd->obd_self_export->exp_target_data;
                osfs->os_bavail -= min_t(u64, osfs->os_bavail,
-                                        fed->fed_grant >> ofd->ofd_blockbits);
+                                        ted->ted_grant >> tgd->tgd_blockbits);
        }
 
-       ofd_grant_sanity_check(obd, __FUNCTION__);
-       CDEBUG(D_CACHE, LPU64" blocks: "LPU64" free, "LPU64" avail; "
-              LPU64" objects: "LPU64" free; state %x\n",
+       tgt_grant_sanity_check(obd, __func__);
+       CDEBUG(D_CACHE, "%llu blocks: %llu free, %llu avail; "
+              "%llu objects: %llu free; state %x\n",
               osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
               osfs->os_files, osfs->os_ffree, osfs->os_state);
 
        if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
-                                ofd->ofd_lut.lut_lsd.lsd_osd_index))
-               osfs->os_ffree = 0;
+                                ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
+               /* Reduce free inode count to zero, but keep "used" intact */
+               osfs->os_files -= osfs->os_ffree;
+               osfs->os_ffree -= osfs->os_ffree;
+       }
 
        /* OS_STATE_READONLY can be set by OSD already */
        if (ofd->ofd_raid_degraded)
                osfs->os_state |= OS_STATE_DEGRADED;
 
-       if (obd->obd_self_export != exp && ofd_grant_compat(exp, ofd)) {
+       if (obd->obd_self_export != exp && !exp_grant_param_supp(exp) &&
+           tgd->tgd_blockbits > COMPAT_BSIZE_SHIFT) {
                /* clients which don't support OBD_CONNECT_GRANT_PARAM
                 * should not see a block size > page size, otherwise
                 * cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12)
                 * block size which is the biggest block size known to work
                 * with all client's page size. */
-               osfs->os_blocks <<= ofd->ofd_blockbits - COMPAT_BSIZE_SHIFT;
-               osfs->os_bfree  <<= ofd->ofd_blockbits - COMPAT_BSIZE_SHIFT;
-               osfs->os_bavail <<= ofd->ofd_blockbits - COMPAT_BSIZE_SHIFT;
+               osfs->os_blocks <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
+               osfs->os_bfree  <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
+               osfs->os_bavail <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
                osfs->os_bsize    = 1 << COMPAT_BSIZE_SHIFT;
        }
 
        if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC,
-                                ofd->ofd_lut.lut_lsd.lsd_osd_index))
-               osfs->os_bfree = osfs->os_bavail = 2;
+                                ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
+               /* Reduce free blocks count near zero, but keep "used" intact */
+               osfs->os_bavail -= osfs->os_bavail - 2;
+               osfs->os_blocks -= osfs->os_bfree - 2;
+               osfs->os_bfree -= osfs->os_bfree - 2;
+       }
 
        EXIT;
 out:
@@ -967,14 +904,12 @@ out:
 int ofd_destroy_by_fid(const struct lu_env *env, struct ofd_device *ofd,
                       const struct lu_fid *fid, int orphan)
 {
-       struct ofd_thread_info  *info = ofd_info(env);
-       struct lustre_handle     lockh;
-       __u64                    flags = LDLM_FL_AST_DISCARD_DATA;
-       __u64                    rc = 0;
-       ldlm_policy_data_t       policy = {
-                                       .l_extent = { 0, OBD_OBJECT_EOF }
-                                };
-       struct ofd_object       *fo;
+       struct ofd_thread_info *info = ofd_info(env);
+       struct lustre_handle lockh;
+       union ldlm_policy_data policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
+       struct ofd_object *fo;
+       __u64 flags = LDLM_FL_AST_DISCARD_DATA;
+       __u64 rc = 0;
 
        ENTRY;
 
@@ -1031,6 +966,10 @@ static int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp,
 
        ofd_info_init(env, exp);
 
+       rc = ofd_validate_seq(exp, ostid_seq(&oa->o_oi));
+       if (rc != 0)
+               RETURN(rc);
+
        CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid));
 
        rc = ofd_destroy_by_fid(env, ofd, fid, 0);
@@ -1070,16 +1009,16 @@ static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
                           struct obdo *oa)
 {
        struct ofd_device       *ofd = ofd_exp(exp);
-       struct ofd_thread_info  *info;
        u64                      seq = ostid_seq(&oa->o_oi);
        struct ofd_seq          *oseq;
        int                      rc = 0, diff = 1;
+       long                     granted;
        u64                      next_id;
        int                      count;
 
        ENTRY;
 
-       info = ofd_info_init(env, exp);
+       ofd_info_init(env, exp);
 
        LASSERT(seq == FID_SEQ_ECHO);
        LASSERT(oa->o_valid & OBD_MD_FLGROUP);
@@ -1093,16 +1032,22 @@ static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
        if (unlikely(ofd->ofd_lastid_rebuilding))
                GOTO(out_sem, rc = -ENOSPC);
 
+       rc = ofd_validate_seq(exp, seq);
+       if (rc != 0)
+               RETURN(rc);
+
        oseq = ofd_seq_load(env, ofd, seq);
        if (IS_ERR(oseq)) {
-               CERROR("%s: Can't find FID Sequence "LPX64": rc = %ld\n",
+               CERROR("%s: Can't find FID Sequence %#llx: rc = %ld\n",
                       ofd_name(ofd), seq, PTR_ERR(oseq));
                GOTO(out_sem, rc = -EINVAL);
        }
 
        mutex_lock(&oseq->os_create_lock);
-       rc = ofd_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
-       if (rc < 0) {
+       granted = tgt_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
+       if (granted < 0) {
+               rc = granted;
+               granted = 0;
                CDEBUG(D_HA, "%s: failed to acquire grant space for "
                       "precreate (%d): rc = %d\n", ofd_name(ofd), diff, rc);
                diff = 0;
@@ -1122,7 +1067,7 @@ static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
                rc = 0;
        }
 
-       ofd_grant_commit(env, ofd_obd(ofd)->obd_self_export, rc);
+       tgt_grant_commit(ofd_obd(ofd)->obd_self_export, granted, rc);
 out:
        mutex_unlock(&oseq->os_create_lock);
        ofd_seq_put(env, oseq);
@@ -1171,7 +1116,7 @@ static int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp,
                __u64 curr_version;
 
                obdo_from_la(oa, &info->fti_attr,
-                            OFD_VALID_FLAGS | LA_UID | LA_GID);
+                            OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID);
 
                /* Store object version in reply */
                curr_version = dt_version_get(env, ofd_object_child(fo));
@@ -1273,7 +1218,7 @@ out:
  * \retval             negative value on error
  */
 static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
-                        void *karg, void *uarg)
+                        void *karg, void __user *uarg)
 {
        struct lu_env            env;
        struct ofd_device       *ofd = ofd_exp(exp);
@@ -1290,7 +1235,7 @@ static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
        switch (cmd) {
        case OBD_IOC_ABORT_RECOVERY:
                CERROR("%s: aborting recovery\n", obd->obd_name);
-               obd->obd_force_abort_recovery = 1;
+               obd->obd_abort_recovery = 1;
                target_stop_recovery_thread(obd);
                break;
        case OBD_IOC_SYNC:
@@ -1351,24 +1296,14 @@ static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
  * special actions, it just invokes target_recovery_cleanup().
  *
  * \param[in] obd      OBD device of OFD
- * \param[in] stage    cleanup stage
  *
  * \retval             0
  */
-static int ofd_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
+static int ofd_precleanup(struct obd_device *obd)
 {
-       int rc = 0;
-
        ENTRY;
-
-       switch(stage) {
-       case OBD_CLEANUP_EARLY:
-               break;
-       case OBD_CLEANUP_EXPORTS:
-               target_cleanup_recovery(obd);
-               break;
-       }
-       RETURN(rc);
+       target_cleanup_recovery(obd);
+       RETURN(0);
 }
 
 /**
@@ -1429,15 +1364,15 @@ static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
        if (unlikely(rc))
                GOTO(out, rc);
 
-       if (info->fti_u.osfs.os_state == OS_STATE_READONLY)
+       if (info->fti_u.osfs.os_state & OS_STATE_READONLY)
                GOTO(out, rc = -EROFS);
 
 #ifdef USE_HEALTH_CHECK_WRITE
-       OBD_ALLOC(info->fti_buf.lb_buf, PAGE_CACHE_SIZE);
+       OBD_ALLOC(info->fti_buf.lb_buf, PAGE_SIZE);
        if (info->fti_buf.lb_buf == NULL)
                GOTO(out, rc = -ENOMEM);
 
-       info->fti_buf.lb_len = PAGE_CACHE_SIZE;
+       info->fti_buf.lb_len = PAGE_SIZE;
        info->fti_off = 0;
 
        th = dt_trans_create(&env, ofd->ofd_osd);
@@ -1456,7 +1391,7 @@ static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
        }
        dt_trans_stop(&env, ofd->ofd_osd, th);
 
-       OBD_FREE(info->fti_buf.lb_buf, PAGE_CACHE_SIZE);
+       OBD_FREE(info->fti_buf.lb_buf, PAGE_SIZE);
 
        CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
 #endif