Whamcloud - gitweb
LU-5306: Update download and other whamcloud URLs
[fs/lustre-release.git] / lustre / ofd / ofd_obd.c
index 5efa4a4..cd14949 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2012, 2013, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
 
 #define DEBUG_SUBSYSTEM S_FILTER
 
+#include <lustre/lustre_idl.h>
 #include "ofd_internal.h"
 #include <obd_cksum.h>
-#include <lquota.h>
+#include <lustre_ioctl.h>
+#include <lustre_quota.h>
+#include <lustre_lfsck.h>
 
 static int ofd_export_stats_init(struct ofd_device *ofd,
                                 struct obd_export *exp, void *client_nid)
 {
        struct obd_device       *obd = ofd_obd(ofd);
        struct nid_stat         *stats;
-       int                      num_stats, i;
+       int                      num_stats;
        int                      rc, newnid = 0;
 
        ENTRY;
 
+       LASSERT(obd->obd_uses_nid_stats);
+
        if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
                /* Self-export gets no proc entry */
                RETURN(0);
@@ -75,32 +80,15 @@ static int ofd_export_stats_init(struct ofd_device *ofd,
        stats = exp->exp_nid_stats;
        LASSERT(stats != NULL);
 
-       OBD_ALLOC(stats->nid_brw_stats, sizeof(struct brw_stats));
-       if (stats->nid_brw_stats == NULL)
-               GOTO(clean, rc = -ENOMEM);
-
-       for (i = 0; i < BRW_LAST; i++)
-               cfs_spin_lock_init(&stats->nid_brw_stats->hist[i].oh_lock);
-
-       rc = lprocfs_seq_create(stats->nid_proc, "brw_stats", 0644,
-                               &ofd_per_nid_stats_fops, stats);
-       if (rc)
-               CWARN("Error adding the brw_stats file\n");
-
-       num_stats = (sizeof(*obd->obd_type->typ_dt_ops) / sizeof(void *)) +
-                    LPROC_OFD_LAST - 1;
+       num_stats = NUM_OBD_STATS + LPROC_OFD_STATS_LAST;
 
        stats->nid_stats = lprocfs_alloc_stats(num_stats,
                                               LPROCFS_STATS_FLAG_NOPERCPU);
        if (stats->nid_stats == NULL)
                return -ENOMEM;
 
-       lprocfs_init_ops_stats(LPROC_OFD_LAST, stats->nid_stats);
-       lprocfs_counter_init(stats->nid_stats, LPROC_OFD_READ_BYTES,
-                            LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
-       lprocfs_counter_init(stats->nid_stats, LPROC_OFD_WRITE_BYTES,
-                            LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
-
+       lprocfs_init_ops_stats(LPROC_OFD_STATS_LAST, stats->nid_stats);
+       ofd_stats_counter_init(stats->nid_stats);
        rc = lprocfs_register_stats(stats->nid_proc, "stats",
                                    stats->nid_stats);
        if (rc)
@@ -119,7 +107,8 @@ clean:
 
 static int ofd_parse_connect_data(const struct lu_env *env,
                                  struct obd_export *exp,
-                                 struct obd_connect_data *data)
+                                 struct obd_connect_data *data,
+                                 bool new_connection)
 {
        struct ofd_device                *ofd = ofd_exp(exp);
        struct filter_export_data        *fed = &exp->exp_filter_data;
@@ -128,16 +117,17 @@ static int ofd_parse_connect_data(const struct lu_env *env,
                RETURN(0);
 
        CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: "LPX64
-              " ocd_version: %x ocd_grant: %d ocd_index: %u\n",
+              " ocd_version: %x ocd_grant: %d ocd_index: %u"
+              " ocd_group %u\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);
+              data->ocd_grant, data->ocd_index, data->ocd_group);
 
        if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
                CWARN("!!! 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://bugs.whamcloud.com/\n",
+                     "https://jira.hpdd.intel.com/\n",
                      obd_export_nid2str(exp), fed->fed_group,
                      data->ocd_group);
                RETURN(-EPROTO);
@@ -145,7 +135,6 @@ static int ofd_parse_connect_data(const struct lu_env *env,
        fed->fed_group = data->ocd_group;
 
        data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
-       exp->exp_connect_flags = data->ocd_connect_flags;
        data->ocd_version = LUSTRE_VERSION_CODE;
 
        /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
@@ -164,21 +153,15 @@ static int ofd_parse_connect_data(const struct lu_env *env,
                data->ocd_grant_extent = ofd->ofd_dt_conf.ddp_grant_frag >> 10;
        }
 
-       if (exp->exp_connect_flags & OBD_CONNECT_GRANT)
-               data->ocd_grant = ofd_grant_connect(env, exp, data->ocd_grant);
+       if (data->ocd_connect_flags & OBD_CONNECT_GRANT)
+               data->ocd_grant = ofd_grant_connect(env, exp, data->ocd_grant,
+                                                   new_connection);
 
        if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
                struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
-               int                    index = lsd->lsd_ost_index;
+               int                    index = lsd->lsd_osd_index;
 
-               if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) {
-                       /* this will only happen on the first connect */
-                       lsd->lsd_ost_index = data->ocd_index;
-                       lsd->lsd_feature_compat |= OBD_COMPAT_OST;
-                       /* sync is not needed here as lut_client_add will
-                        * set exp_need_sync flag */
-                       lut_server_data_update(env, &ofd->ofd_lut, 0);
-               } else if (index != data->ocd_index) {
+               if (index != data->ocd_index) {
                        LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index"
                                           " %u doesn't match actual OST index"
                                           " %u in last_rcvd file, bad "
@@ -187,13 +170,19 @@ static int ofd_parse_connect_data(const struct lu_env *env,
                                           data->ocd_index);
                        RETURN(-EBADF);
                }
+               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
+                        * 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)(PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT));
+                                        (__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 "
@@ -237,14 +226,24 @@ static int ofd_parse_connect_data(const struct lu_env *env,
        if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
                data->ocd_maxbytes = ofd->ofd_dt_conf.ddp_maxbytes;
 
-        RETURN(0);
+       if (OCD_HAS_FLAG(data, PINGLESS)) {
+               if (ptlrpc_pinger_suppress_pings()) {
+                       spin_lock(&exp->exp_obd->obd_dev_lock);
+                       list_del_init(&exp->exp_obd_chain_timed);
+                       spin_unlock(&exp->exp_obd->obd_dev_lock);
+               } else {
+                       data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
+               }
+       }
+
+       RETURN(0);
 }
 
 static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
                             struct obd_device *obd, struct obd_uuid *cluuid,
                             struct obd_connect_data *data, void *localdata)
 {
-       struct ofd_device       *ofd = ofd_dev(obd->obd_lu_dev);
+       struct ofd_device       *ofd;
        int                      rc;
 
        ENTRY;
@@ -252,14 +251,9 @@ static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
        if (exp == NULL || obd == NULL || cluuid == NULL)
                RETURN(-EINVAL);
 
-       rc = lu_env_refill((struct lu_env *)env);
-       if (rc != 0) {
-               CERROR("Failure to refill session: '%d'\n", rc);
-               RETURN(rc);
-       }
+       ofd = ofd_dev(obd->obd_lu_dev);
 
-       ofd_info_init(env, exp);
-       rc = ofd_parse_connect_data(env, exp, data);
+       rc = ofd_parse_connect_data(env, exp, data, false);
        if (rc == 0)
                ofd_export_stats_init(ofd, exp, localdata);
 
@@ -273,8 +267,7 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
        struct obd_export       *exp;
        struct ofd_device       *ofd;
        struct lustre_handle     conn = { 0 };
-       int                      rc, group;
-
+       int                      rc;
        ENTRY;
 
        if (_exp == NULL || obd == NULL || cluuid == NULL)
@@ -289,37 +282,24 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
        exp = class_conn2export(&conn);
        LASSERT(exp != NULL);
 
-       rc = lu_env_refill((struct lu_env *)env);
-       if (rc != 0) {
-               CERROR("Failure to refill session: '%d'\n", rc);
-               GOTO(out, rc);
-       }
-
-       ofd_info_init(env, exp);
-
-       rc = ofd_parse_connect_data(env, exp, data);
+       rc = ofd_parse_connect_data(env, exp, data, true);
        if (rc)
                GOTO(out, rc);
 
-       group = data->ocd_group;
        if (obd->obd_replayable) {
                struct tg_export_data *ted = &exp->exp_target_data;
 
                memcpy(ted->ted_lcd->lcd_uuid, cluuid,
                       sizeof(ted->ted_lcd->lcd_uuid));
-               rc = lut_client_new(env, exp);
+               rc = tgt_client_new(env, exp);
                if (rc != 0)
                        GOTO(out, rc);
                ofd_export_stats_init(ofd, exp, localdata);
        }
-       if (group == 0)
-               GOTO(out, rc = 0);
 
-       /* init new group */
-       if (group > ofd->ofd_max_group) {
-               ofd->ofd_max_group = group;
-               rc = ofd_group_load(env, ofd, group);
-       }
+       CDEBUG(D_HA, "%s: get connection from MDS %d\n", obd->obd_name,
+              data ? data->ocd_group : -1);
+
 out:
        if (rc != 0) {
                class_disconnect(exp);
@@ -330,9 +310,9 @@ out:
        RETURN(rc);
 }
 
-static int ofd_obd_disconnect(struct obd_export *exp)
+int ofd_obd_disconnect(struct obd_export *exp)
 {
-       struct ofd_device       *ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
+       struct ofd_device       *ofd = ofd_exp(exp);
        struct lu_env            env;
        int                      rc;
 
@@ -348,16 +328,17 @@ static int ofd_obd_disconnect(struct obd_export *exp)
 
        ofd_grant_discard(exp);
 
-       rc = lu_env_init(&env, LCT_DT_THREAD);
-       if (rc)
-               RETURN(rc);
-
        /* Do not erase record for recoverable client. */
        if (exp->exp_obd->obd_replayable &&
-           (!exp->exp_obd->obd_fail || exp->exp_failed))
-               lut_client_del(&env, exp);
-       lu_env_fini(&env);
+           (!exp->exp_obd->obd_fail || exp->exp_failed)) {
+               rc = lu_env_init(&env, LCT_DT_THREAD);
+               if (rc)
+                       GOTO(out, rc);
 
+               tgt_client_del(&env, exp);
+               lu_env_fini(&env);
+       }
+out:
        class_export_put(exp);
        RETURN(rc);
 }
@@ -366,18 +347,19 @@ static int ofd_init_export(struct obd_export *exp)
 {
        int rc;
 
-       cfs_spin_lock_init(&exp->exp_filter_data.fed_lock);
+       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);
+       atomic_set(&exp->exp_filter_data.fed_soft_sync_count, 0);
+       spin_lock(&exp->exp_lock);
        exp->exp_connecting = 1;
-       cfs_spin_unlock(&exp->exp_lock);
+       spin_unlock(&exp->exp_lock);
 
        /* self-export doesn't need client data and ldlm initialization */
        if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
                                     &exp->exp_client_uuid)))
                return 0;
 
-       rc = lut_client_alloc(exp);
+       rc = tgt_client_alloc(exp);
        if (rc == 0)
                ldlm_init_export(exp);
        if (rc)
@@ -388,7 +370,7 @@ static int ofd_init_export(struct obd_export *exp)
 
 static int ofd_destroy_export(struct obd_export *exp)
 {
-       struct ofd_device *ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
+       struct ofd_device *ofd = ofd_exp(exp);
 
        if (exp->exp_filter_data.fed_pending)
                CERROR("%s: cli %s/%p has %lu pending on destroyed export"
@@ -402,7 +384,7 @@ static int ofd_destroy_export(struct obd_export *exp)
                return 0;
 
        ldlm_destroy_export(exp);
-       lut_client_free(exp);
+       tgt_client_free(exp);
 
        ofd_fmd_cleanup(exp);
 
@@ -413,7 +395,7 @@ static int ofd_destroy_export(struct obd_export *exp)
        ofd_grant_discard(exp);
        ofd_fmd_cleanup(exp);
 
-       if (exp->exp_connect_flags & OBD_CONNECT_GRANT_SHRINK) {
+       if (exp_connect_flags(exp) & OBD_CONNECT_GRANT_SHRINK) {
                if (ofd->ofd_tot_granted_clients > 0)
                        ofd->ofd_tot_granted_clients --;
        }
@@ -425,6 +407,24 @@ static int ofd_destroy_export(struct obd_export *exp)
        return 0;
 }
 
+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);
+
+       return ldev->ld_ops->ldo_recovery_complete(env, ldev);
+}
+
 int ofd_obd_postrecov(struct obd_device *obd)
 {
        struct lu_env            env;
@@ -438,53 +438,20 @@ int ofd_obd_postrecov(struct obd_device *obd)
                RETURN(rc);
        ofd_info_init(&env, obd->obd_self_export);
 
-       rc = ldev->ld_ops->ldo_recovery_complete(&env, ldev);
-       lu_env_fini(&env);
-       RETURN(rc);
-}
-
-static int ofd_adapt_sptlrpc_conf(const struct lu_env *env,
-                                 struct obd_device *obd, int initial)
-{
-       struct filter_obd       *fo = &obd->u.filter;
-       struct sptlrpc_rule_set  tmp_rset;
-       int                      rc;
-
-       sptlrpc_rule_set_init(&tmp_rset);
-       rc = sptlrpc_conf_target_get_rules(obd, &tmp_rset, initial);
-       if (rc) {
-               CERROR("%s: failed get sptlrpc rules: rc = %d\n",
-                      obd->obd_name, rc);
-               return rc;
-       }
-
-       sptlrpc_target_update_exp_flavor(obd, &tmp_rset);
-
-       cfs_write_lock(&fo->fo_sptlrpc_lock);
-       sptlrpc_rule_set_free(&fo->fo_sptlrpc_rset);
-       fo->fo_sptlrpc_rset = tmp_rset;
-       cfs_write_unlock(&fo->fo_sptlrpc_lock);
+       rc = ofd_postrecov(&env, ofd_dev(ldev));
 
-       return 0;
-}
-
-static int ofd_set_mds_conn(struct obd_export *exp, void *val)
-{
-       int rc = 0;
-
-       ENTRY;
-
-       LCONSOLE_WARN("%s: received MDS connection from %s\n",
-                     exp->exp_obd->obd_name, obd_export_nid2str(exp));
+       lu_env_fini(&env);
        RETURN(rc);
 }
 
+/* This is not called from request handler, check ofd_set_info_hdl() instead
+ * this OBD functions is only used by class_notify_sptlrpc_conf() locally
+ * by direct obd_set_info_async() call */
 static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
                              __u32 keylen, void *key, __u32 vallen, void *val,
                              struct ptlrpc_request_set *set)
 {
-       struct ofd_device       *ofd = ofd_exp(exp);
-       int                      rc = 0;
+       int rc = 0;
 
        ENTRY;
 
@@ -493,35 +460,26 @@ static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
                RETURN(-EINVAL);
        }
 
-       if (KEY_IS(KEY_CAPA_KEY)) {
-               rc = ofd_update_capa_key(ofd, val);
-               if (rc)
-                       CERROR("%s: update capability key failed: rc = %d\n",
-                              exp->exp_obd->obd_name, rc);
-       } else if (KEY_IS(KEY_SPTLRPC_CONF)) {
-               ofd_adapt_sptlrpc_conf(env, exp->exp_obd, 0);
-       } else if (KEY_IS(KEY_MDS_CONN)) {
-               rc = ofd_set_mds_conn(exp, val);
-       } else if (KEY_IS(KEY_GRANT_SHRINK)) {
-               struct ost_body *body = val;
-
-               /** handle grant shrink, similar to a read request */
-               ofd_grant_prepare_read(env, exp, &body->oa);
+       if (KEY_IS(KEY_SPTLRPC_CONF)) {
+               rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp), 0);
        } else {
                CERROR("%s: Unsupported key %s\n",
                       exp->exp_obd->obd_name, (char*)key);
                rc = -EOPNOTSUPP;
        }
-
        RETURN(rc);
 }
 
+/* used by nrs_orr_range_fill_physical() in ptlrpc, see LU-3239 */
 static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
                        __u32 keylen, void *key, __u32 *vallen, void *val,
                        struct lov_stripe_md *lsm)
 {
-       struct ofd_device       *ofd = ofd_exp(exp);
-       int                      rc = 0;
+       struct ofd_thread_info          *info;
+       struct ofd_device               *ofd;
+       struct ll_fiemap_info_key       *fm_key = key;
+       struct ll_user_fiemap           *fiemap = val;
+       int                              rc = 0;
 
        ENTRY;
 
@@ -530,75 +488,19 @@ static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
                RETURN(-EINVAL);
        }
 
-       if (KEY_IS(KEY_BLOCKSIZE)) {
-               __u32 *blocksize = val;
-               if (blocksize) {
-                       if (*vallen < sizeof(*blocksize))
-                               RETURN(-EOVERFLOW);
-                       *blocksize = 1 << ofd->ofd_dt_conf.ddp_block_shift;
-               }
-               *vallen = sizeof(*blocksize);
-       } else if (KEY_IS(KEY_BLOCKSIZE_BITS)) {
-               __u32 *blocksize_bits = val;
-               if (blocksize_bits) {
-                       if (*vallen < sizeof(*blocksize_bits))
-                               RETURN(-EOVERFLOW);
-                       *blocksize_bits = ofd->ofd_dt_conf.ddp_block_shift;
-               }
-               *vallen = sizeof(*blocksize_bits);
-       } else if (KEY_IS(KEY_LAST_ID)) {
-               obd_id *last_id = val;
-               if (last_id) {
-                       if (*vallen < sizeof(*last_id))
-                               RETURN(-EOVERFLOW);
-                       *last_id = ofd_last_id(ofd,
-                                              exp->exp_filter_data.fed_group);
-               }
-               *vallen = sizeof(*last_id);
-       } else if (KEY_IS(KEY_FIEMAP)) {
-               struct ofd_thread_info          *info;
-               struct ofd_device               *ofd = ofd_exp(exp);
-               struct ofd_object               *fo;
-               struct ll_fiemap_info_key       *fm_key = key;
-
-               if (val == NULL) {
-                       *vallen = fiemap_count_to_size(
-                                              fm_key->fiemap.fm_extent_count);
-                       RETURN(0);
-               }
+       ofd = ofd_exp(exp);
 
+       if (KEY_IS(KEY_FIEMAP)) {
                info = ofd_info_init(env, exp);
 
-               fid_ostid_unpack(&info->fti_fid, &fm_key->oa.o_oi, 0);
-
-               CDEBUG(D_INODE, "get FIEMAP of object "DFID"\n",
-                      PFID(&info->fti_fid));
+               rc = ostid_to_fid(&info->fti_fid, &fm_key->oa.o_oi,
+                                 ofd->ofd_lut.lut_lsd.lsd_osd_index);
+               if (rc != 0)
+                       RETURN(rc);
 
-               fo = ofd_object_find(env, ofd, &info->fti_fid);
-               if (IS_ERR(fo)) {
-                       CERROR("%s: error finding object "DFID"\n",
-                              exp->exp_obd->obd_name, PFID(&info->fti_fid));
-                       rc = PTR_ERR(fo);
-               } else {
-                       struct ll_user_fiemap *fiemap = val;
-
-                       ofd_read_lock(env, fo);
-                       if (ofd_object_exists(fo)) {
-                               *fiemap = fm_key->fiemap;
-                               rc = dt_fiemap_get(env,
-                                                  ofd_object_child(fo),
-                                                  fiemap);
-                       } else {
-                               rc = -ENOENT;
-                       }
-                       ofd_read_unlock(env, fo);
-                       ofd_object_put(env, fo);
-               }
-       } else if (KEY_IS(KEY_SYNC_LOCK_CANCEL)) {
-               *((__u32 *) val) = ofd->ofd_sync_lock_cancel;
-               *vallen = sizeof(__u32);
+               rc = ofd_fiemap_get(env, ofd, &info->fti_fid, fiemap);
        } else {
-               CERROR("Not supported key %s\n", (char*)key);
+               CERROR("%s: not supported key %s\n", ofd_name(ofd), (char*)key);
                rc = -EOPNOTSUPP;
        }
 
@@ -609,9 +511,17 @@ static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
 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;
+       int rc = 0;
+       ENTRY;
+
+       down_read(&ofd->ofd_lastid_rwsem);
+       /* Currently, for safe, we do not distinguish which LAST_ID is broken,
+        * we may do that in the future.
+        * Return -ENOSPC until the LAST_ID rebuilt. */
+       if (unlikely(ofd->ofd_lastid_rebuilding))
+               GOTO(out, rc = -ENOSPC);
 
-       cfs_spin_lock(&ofd->ofd_osfs_lock);
+       spin_lock(&ofd->ofd_osfs_lock);
        if (cfs_time_before_64(ofd->ofd_osfs_age, max_age) || max_age == 0) {
                obd_size unstable;
 
@@ -630,16 +540,16 @@ int ofd_statfs_internal(const struct lu_env *env, struct ofd_device *ofd,
                /* record value of inflight counter before running statfs to
                 * compute the diff once statfs is completed */
                unstable = ofd->ofd_osfs_inflight;
-               cfs_spin_unlock(&ofd->ofd_osfs_lock);
+               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))
-                       return rc;
+                       GOTO(out, rc);
 
-               cfs_spin_lock(&ofd->ofd_grant_lock);
-               cfs_spin_lock(&ofd->ofd_osfs_lock);
+               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;
@@ -663,7 +573,7 @@ int ofd_statfs_internal(const struct lu_env *env, struct ofd_device *ofd,
                /* similarly, there is some uncertainty on write requests
                 * between prepare & commit */
                ofd->ofd_osfs_unstable += ofd->ofd_tot_pending;
-               cfs_spin_unlock(&ofd->ofd_grant_lock);
+               spin_unlock(&ofd->ofd_grant_lock);
 
                /* finally udpate cached statfs data */
                ofd->ofd_osfs = *osfs;
@@ -672,25 +582,31 @@ int ofd_statfs_internal(const struct lu_env *env, struct ofd_device *ofd,
                ofd->ofd_statfs_inflight--; /* stop tracking */
                if (ofd->ofd_statfs_inflight == 0)
                        ofd->ofd_osfs_inflight = 0;
-               cfs_spin_unlock(&ofd->ofd_osfs_lock);
+               spin_unlock(&ofd->ofd_osfs_lock);
 
                if (from_cache)
                        *from_cache = 0;
        } else {
                /* use cached statfs data */
                *osfs = ofd->ofd_osfs;
-               cfs_spin_unlock(&ofd->ofd_osfs_lock);
+               spin_unlock(&ofd->ofd_osfs_lock);
                if (from_cache)
                        *from_cache = 1;
        }
-       return 0;
+
+       GOTO(out, rc);
+
+out:
+       up_read(&ofd->ofd_lastid_rwsem);
+
+       return rc;
 }
 
-static int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
-                     struct obd_statfs *osfs, __u64 max_age, __u32 flags)
+int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
+              struct obd_statfs *osfs, __u64 max_age, __u32 flags)
 {
         struct obd_device      *obd = class_exp2obd(exp);
-       struct ofd_device       *ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
+       struct ofd_device       *ofd = ofd_exp(exp);
        int                      rc;
 
        ENTRY;
@@ -715,7 +631,7 @@ static int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
 
        /* The QoS code on the MDS does not care about space reserved for
         * precreate, so take it out. */
-       if (exp->exp_connect_flags & OBD_CONNECT_MDS) {
+       if (exp_connect_flags(exp) & OBD_CONNECT_MDS) {
                struct filter_export_data *fed;
 
                fed = &obd->obd_self_export->exp_filter_data;
@@ -729,12 +645,8 @@ static int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
               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_ENOSPC,
-                                ofd->ofd_lut.lut_lsd.lsd_ost_index))
-               osfs->os_bfree = osfs->os_bavail = 2;
-
        if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
-                                ofd->ofd_lut.lut_lsd.lsd_ost_index))
+                                ofd->ofd_lut.lut_lsd.lsd_osd_index))
                osfs->os_ffree = 0;
 
        /* OS_STATE_READONLY can be set by OSD already */
@@ -753,13 +665,18 @@ static int ofd_statfs(const struct lu_env *env,  struct obd_export *exp,
                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;
+
        EXIT;
 out:
        return rc;
 }
 
-int ofd_setattr(const struct lu_env *env, struct obd_export *exp,
-               struct obd_info *oinfo, struct obd_trans_info *oti)
+/* needed by echo client only for now, RPC handler uses ofd_setattr_hdl() */
+int ofd_echo_setattr(const struct lu_env *env, struct obd_export *exp,
+                    struct obd_info *oinfo, struct obd_trans_info *oti)
 {
        struct ofd_thread_info  *info;
        struct ofd_device       *ofd = ofd_exp(exp);
@@ -767,49 +684,43 @@ int ofd_setattr(const struct lu_env *env, struct obd_export *exp,
        struct ldlm_resource    *res;
        struct ofd_object       *fo;
        struct obdo             *oa = oinfo->oi_oa;
+       struct lu_fid           *fid = &oa->o_oi.oi_fid;
        struct filter_fid       *ff = NULL;
        int                      rc = 0;
 
        ENTRY;
 
        info = ofd_info_init(env, exp);
-       ofd_oti2info(info, oti);
 
-       fid_ostid_unpack(&info->fti_fid, &oinfo->oi_oa->o_oi, 0);
-       ofd_build_resid(&info->fti_fid, &info->fti_resid);
-
-       rc = ofd_auth_capa(exp, &info->fti_fid, oa->o_seq,
-                          oinfo_capa(oinfo), CAPA_OPC_META_WRITE);
-       if (rc)
-               GOTO(out, rc);
+       ost_fid_build_resid(fid, &info->fti_resid);
 
        /* This would be very bad - accidentally truncating a file when
         * changing the time or similar - bug 12203. */
-       if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE &&
+       if (oa->o_valid & OBD_MD_FLSIZE &&
            oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
                static char mdsinum[48];
 
-               if (oinfo->oi_oa->o_valid & OBD_MD_FLFID)
+               if (oa->o_valid & OBD_MD_FLFID)
                        snprintf(mdsinum, sizeof(mdsinum) - 1,
-                                "of parent "DFID, oinfo->oi_oa->o_parent_seq,
-                                oinfo->oi_oa->o_parent_oid, 0);
+                                "of parent "DFID, oa->o_parent_seq,
+                                oa->o_parent_oid, 0);
                else
                        mdsinum[0] = '\0';
 
                CERROR("%s: setattr from %s trying to truncate object "DFID
-                      " %s\n", exp->exp_obd->obd_name,
-                      obd_export_nid2str(exp), PFID(&info->fti_fid), mdsinum);
+                      " %s\n", ofd_name(ofd), obd_export_nid2str(exp),
+                      PFID(fid), mdsinum);
                GOTO(out, rc = -EPERM);
        }
 
-       fo = ofd_object_find(env, ofd, &info->fti_fid);
+       fo = ofd_object_find_exists(env, ofd, fid);
        if (IS_ERR(fo)) {
                CERROR("%s: can't find object "DFID"\n",
-                      exp->exp_obd->obd_name, PFID(&info->fti_fid));
+                      ofd_name(ofd), PFID(fid));
                GOTO(out, rc = PTR_ERR(fo));
        }
 
-       la_from_obdo(&info->fti_attr, oinfo->oi_oa, oinfo->oi_oa->o_valid);
+       la_from_obdo(&info->fti_attr, oa, oa->o_valid);
        info->fti_attr.la_valid &= ~LA_TYPE;
 
        if (oa->o_valid & OBD_MD_FLFID) {
@@ -822,119 +733,34 @@ int ofd_setattr(const struct lu_env *env, struct obd_export *exp,
        if (rc)
                GOTO(out_unlock, rc);
 
-       res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0);
-       if (res != NULL) {
-               ldlm_res_lvbo_update(res, NULL, 0);
-               ldlm_resource_putref(res);
-       }
-
-       oinfo->oi_oa->o_valid = OBD_MD_FLID;
-
-       /* Quota release needs uid/gid info */
-       rc = ofd_attr_get(env, fo, &info->fti_attr);
-       obdo_from_la(oinfo->oi_oa, &info->fti_attr,
-                    OFD_VALID_FLAGS | LA_UID | LA_GID);
-       ofd_info2oti(info, oti);
-
-       ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, oti->oti_jobid, 1);
+       ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, NULL, 1);
        EXIT;
 out_unlock:
        ofd_object_put(env, fo);
 out:
-       return rc;
-}
-
-static int ofd_punch(const struct lu_env *env, struct obd_export *exp,
-                    struct obd_info *oinfo, struct obd_trans_info *oti,
-                    struct ptlrpc_request_set *rqset)
-{
-       struct ofd_thread_info  *info;
-       struct ofd_device       *ofd = ofd_exp(exp);
-       struct ldlm_namespace   *ns = ofd->ofd_namespace;
-       struct ldlm_resource    *res;
-       struct ofd_object       *fo;
-       struct filter_fid       *ff = NULL;
-       int                      rc = 0;
-
-       ENTRY;
-
-       info = ofd_info_init(env, exp);
-       ofd_oti2info(info, oti);
-
-       fid_ostid_unpack(&info->fti_fid, &oinfo->oi_oa->o_oi, 0);
-       ofd_build_resid(&info->fti_fid, &info->fti_resid);
-
-       CDEBUG(D_INODE, "calling punch for object "DFID", valid = "LPX64
-              ", start = "LPD64", end = "LPD64"\n", PFID(&info->fti_fid),
-              oinfo->oi_oa->o_valid, oinfo->oi_policy.l_extent.start,
-              oinfo->oi_policy.l_extent.end);
-
-       rc = ofd_auth_capa(exp, &info->fti_fid, oinfo->oi_oa->o_seq,
-                          oinfo_capa(oinfo), CAPA_OPC_OSS_TRUNC);
-       if (rc)
-               GOTO(out_env, rc);
-
-       fo = ofd_object_find(env, ofd, &info->fti_fid);
-       if (IS_ERR(fo)) {
-               CERROR("%s: error finding object "DFID": rc = %ld\n",
-                      exp->exp_obd->obd_name, PFID(&info->fti_fid),
-                      PTR_ERR(fo));
-               GOTO(out_env, rc = PTR_ERR(fo));
-       }
-
-       LASSERT(oinfo->oi_policy.l_extent.end == OBD_OBJECT_EOF);
-       if (oinfo->oi_policy.l_extent.end == OBD_OBJECT_EOF) {
-               /* Truncate case */
-               oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
-       } else if (oinfo->oi_policy.l_extent.end >= oinfo->oi_oa->o_size) {
-               oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.end;
-       }
-
-       la_from_obdo(&info->fti_attr, oinfo->oi_oa,
-                    OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME);
-       info->fti_attr.la_valid &= ~LA_TYPE;
-       info->fti_attr.la_size = oinfo->oi_policy.l_extent.start;
-       info->fti_attr.la_valid |= LA_SIZE;
-
-       if (oinfo->oi_oa->o_valid & OBD_MD_FLFID) {
-               ff = &info->fti_mds_fid;
-               ofd_prepare_fidea(ff, oinfo->oi_oa);
-       }
-
-       rc = ofd_object_punch(env, fo, oinfo->oi_policy.l_extent.start,
-                             oinfo->oi_policy.l_extent.end, &info->fti_attr,
-                             ff);
-       if (rc)
-               GOTO(out, rc);
-
-       res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0);
-       if (res != NULL) {
-               ldlm_res_lvbo_update(res, NULL, 0);
-               ldlm_resource_putref(res);
+       if (rc == 0) {
+               /* we do not call this before to avoid lu_object_find() in
+                *  ->lvbo_update() holding another reference on the object.
+                * otherwise concurrent destroy can make the object unavailable
+                * for 2nd lu_object_find() waiting for the first reference
+                * to go... deadlock! */
+               res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0);
+               if (!IS_ERR(res)) {
+                       ldlm_res_lvbo_update(res, NULL, 0);
+                       ldlm_resource_putref(res);
+               }
        }
 
-       oinfo->oi_oa->o_valid = OBD_MD_FLID;
-       /* Quota release needs uid/gid info */
-       rc = ofd_attr_get(env, fo, &info->fti_attr);
-       obdo_from_la(oinfo->oi_oa, &info->fti_attr,
-                    OFD_VALID_FLAGS | LA_UID | LA_GID);
-       ofd_info2oti(info, oti);
-
-       ofd_counter_incr(exp, LPROC_OFD_STATS_PUNCH, oti->oti_jobid, 1);
-       EXIT;
-out:
-       ofd_object_put(env, fo);
-out_env:
        return rc;
 }
 
-static int ofd_destroy_by_fid(const struct lu_env *env,
-                             struct ofd_device *ofd,
-                             const struct lu_fid *fid, int orphan)
+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;
-       int                      flags = LDLM_AST_DISCARD_DATA, rc = 0;
+       __u64                    flags = LDLM_FL_AST_DISCARD_DATA;
+       __u64                    rc = 0;
        ldlm_policy_data_t       policy = {
                                        .l_extent = { 0, OBD_OBJECT_EOF }
                                 };
@@ -942,371 +768,229 @@ static int ofd_destroy_by_fid(const struct lu_env *env,
 
        ENTRY;
 
+       fo = ofd_object_find_exists(env, ofd, fid);
+       if (IS_ERR(fo))
+               RETURN(PTR_ERR(fo));
+
        /* Tell the clients that the object is gone now and that they should
         * throw away any cached pages. */
-       ofd_build_resid(fid, &info->fti_resid);
+       ost_fid_build_resid(fid, &info->fti_resid);
        rc = ldlm_cli_enqueue_local(ofd->ofd_namespace, &info->fti_resid,
                                    LDLM_EXTENT, &policy, LCK_PW, &flags,
                                    ldlm_blocking_ast, ldlm_completion_ast,
-                                   NULL, NULL, 0, NULL, &lockh);
+                                   NULL, NULL, 0, LVB_T_NONE, NULL, &lockh);
 
        /* We only care about the side-effects, just drop the lock. */
        if (rc == ELDLM_OK)
                ldlm_lock_decref(&lockh, LCK_PW);
 
-       fo = ofd_object_find(env, ofd, fid);
-       if (IS_ERR(fo))
-               RETURN(PTR_ERR(fo));
        LASSERT(fo != NULL);
 
        rc = ofd_object_destroy(env, fo, orphan);
+       EXIT;
 
        ofd_object_put(env, fo);
        RETURN(rc);
 }
 
-int ofd_destroy(const struct lu_env *env, struct obd_export *exp,
-               struct obdo *oa, struct lov_stripe_md *md,
-               struct obd_trans_info *oti, struct obd_export *md_exp,
-               void *capa)
+/* needed by echo client only for now, RPC handler uses ofd_destroy_hdl() */
+int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp,
+                    struct obdo *oa, struct lov_stripe_md *md,
+                    struct obd_trans_info *oti, struct obd_export *md_exp,
+                    void *capa)
 {
        struct ofd_device       *ofd = ofd_exp(exp);
-       struct ofd_thread_info  *info;
-       obd_count                count;
+       struct lu_fid           *fid = &oa->o_oi.oi_fid;
        int                      rc = 0;
 
        ENTRY;
 
-       info = ofd_info_init(env, exp);
-       ofd_oti2info(info, oti);
-
-       if (!(oa->o_valid & OBD_MD_FLGROUP))
-               oa->o_seq = 0;
-
-       /* check that o_misc makes sense */
-       if (oa->o_valid & OBD_MD_FLOBJCOUNT)
-               count = oa->o_misc;
-       else
-               count = 1; /* default case - single destroy */
-
-       /**
-        * There can be sequence of objects to destroy. Therefore this request
-        * may have multiple transaction involved in. It is OK, we need only
-        * the highest used transno to be reported back in reply but not for
-        * replays, they must report their transno
-        */
-       if (info->fti_transno == 0) /* not replay */
-               info->fti_mult_trans = 1;
-       while (count > 0) {
-               int lrc;
-
-               fid_ostid_unpack(&info->fti_fid, &oa->o_oi, 0);
-               lrc = ofd_destroy_by_fid(env, ofd, &info->fti_fid, 0);
-               if (lrc == -ENOENT) {
-                       CDEBUG(D_INODE,
-                              "destroying non-existent object "LPU64"\n",
-                              oa->o_id);
-                       /* rewrite rc with -ENOENT only if it is 0 */
-                       if (rc == 0)
-                               rc = lrc;
-               } else if (lrc != 0) {
-                       CEMERG("error destroying object "LPU64": %d\n",
-                              oa->o_id, rc);
-                       rc = lrc;
-               }
-               count--;
-               oa->o_id++;
-       }
+       ofd_info_init(env, exp);
 
-       /* if we have transaction then there were some deletions, we don't
-        * need to return ENOENT in that case because it will not wait
-        * for commit of these deletions. The ENOENT must be returned only
-        * if there were no transations.
-        */
+       CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid));
+
+       rc = ofd_destroy_by_fid(env, ofd, fid, 0);
        if (rc == -ENOENT) {
-               if (info->fti_transno != 0)
-                       rc = 0;
+               CDEBUG(D_INODE, "%s: destroying non-existent object "DFID"\n",
+                      ofd_name(ofd), PFID(fid));
+               GOTO(out, rc);
        } else if (rc != 0) {
-               /*
-                * If we have at least one transaction then llog record
-                * on server will be removed upon commit, so for rc != 0
-                * we return no transno and llog record will be reprocessed.
-                */
-               info->fti_transno = 0;
-       }
-       ofd_info2oti(info, oti);
-       RETURN(rc);
-}
-
-static int ofd_orphans_destroy(const struct lu_env *env,
-                              struct obd_export *exp, struct ofd_device *ofd,
-                              struct obdo *oa)
-{
-       struct ofd_thread_info  *info = ofd_info(env);
-       obd_id                   last;
-       int                      skip_orphan;
-       int                      rc = 0;
-       struct ost_id            oi = oa->o_oi;
-
-       ENTRY;
-
-       LASSERT(exp != NULL);
-       skip_orphan = !!(exp->exp_connect_flags & OBD_CONNECT_SKIP_ORPHAN);
-
-       last = ofd_last_id(ofd, oa->o_seq);
-       CWARN("%s: deleting orphan objects from "LPU64" to "LPU64"\n",
-             ofd_obd(ofd)->obd_name, oa->o_id + 1, last);
-
-       for (oi.oi_id = last; oi.oi_id > oa->o_id; oi.oi_id--) {
-               fid_ostid_unpack(&info->fti_fid, &oi, 0);
-               rc = ofd_destroy_by_fid(env, ofd, &info->fti_fid, 1);
-               if (rc && rc != -ENOENT) /* this is pretty fatal... */
-                       CEMERG("error destroying precreated id "LPU64": %d\n",
-                              oi.oi_id, rc);
-               if (!skip_orphan) {
-                       ofd_last_id_set(ofd, oi.oi_id - 1, oa->o_seq);
-                       /* 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 ((oi.oi_id & 511) == 0)
-                               ofd_last_id_write(env, ofd, oa->o_seq);
-               }
-       }
-       CDEBUG(D_HA, "%s: after destroy: set last_objids["LPU64"] = "LPU64"\n",
-              ofd_obd(ofd)->obd_name, oa->o_seq, oa->o_id);
-       if (!skip_orphan) {
-               rc = ofd_last_id_write(env, ofd, oa->o_seq);
-       } else {
-               /* don't reuse orphan object, return last used objid */
-               oa->o_id = last;
-               rc = 0;
+               CERROR("%s: error destroying object "DFID": %d\n",
+                      ofd_name(ofd), PFID(fid), rc);
+               GOTO(out, rc);
        }
-       RETURN(rc);
+       EXIT;
+out:
+       return rc;
 }
 
-int ofd_create(const struct lu_env *env, struct obd_export *exp,
-              struct obdo *oa, struct lov_stripe_md **ea,
-              struct obd_trans_info *oti)
+/* needed by echo client only for now, RPC handler uses ofd_create_hdl()
+ * It is much simpler and just create objects */
+int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
+                   struct obdo *oa, struct lov_stripe_md **ea,
+                   struct obd_trans_info *oti)
 {
        struct ofd_device       *ofd = ofd_exp(exp);
        struct ofd_thread_info  *info;
-       int                      rc = 0, diff;
+       obd_seq                  seq = ostid_seq(&oa->o_oi);
+       struct ofd_seq          *oseq;
+       int                      rc = 0, diff = 1;
+       obd_id                   next_id;
+       int                      count;
 
        ENTRY;
 
        info = ofd_info_init(env, exp);
-       ofd_oti2info(info, oti);
 
-       LASSERT(oa->o_seq >= FID_SEQ_OST_MDT0);
+       LASSERT(seq == FID_SEQ_ECHO);
        LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 
-       CDEBUG(D_INFO, "ofd_create(oa->o_seq="LPU64",oa->o_id="LPU64")\n",
-              oa->o_seq, oa->o_id);
+       CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
 
-       if ((oa->o_valid & OBD_MD_FLFLAGS) &&
-           (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
-               if (!ofd_obd(ofd)->obd_recovering ||
-                   oa->o_id > ofd_last_id(ofd, oa->o_seq)) {
-                       CERROR("recreate objid "LPU64" > last id "LPU64"\n",
-                                       oa->o_id, ofd_last_id(ofd, oa->o_seq));
-                       GOTO(out_nolock, rc = -EINVAL);
-               }
-               /* do nothing because we create objects during first write */
-               GOTO(out_nolock, rc = 0);
+       down_read(&ofd->ofd_lastid_rwsem);
+       /* Currently, for safe, we do not distinguish which LAST_ID is broken,
+        * we may do that in the future.
+        * Return -ENOSPC until the LAST_ID rebuilt. */
+       if (unlikely(ofd->ofd_lastid_rebuilding))
+               GOTO(out_sem, rc = -ENOSPC);
+
+       oseq = ofd_seq_load(env, ofd, seq);
+       if (IS_ERR(oseq)) {
+               CERROR("%s: Can't find FID Sequence "LPX64": rc = %ld\n",
+                      ofd_name(ofd), seq, PTR_ERR(oseq));
+               GOTO(out_sem, rc = -EINVAL);
        }
-       /* former ofd_handle_precreate */
-       if ((oa->o_valid & OBD_MD_FLFLAGS) &&
-           (oa->o_flags & OBD_FL_DELORPHAN)) {
-               /* destroy orphans */
-               if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
-                       CERROR("%s: dropping old orphan cleanup request\n",
-                              ofd_obd(ofd)->obd_name);
-                       GOTO(out_nolock, rc = 0);
-               }
-               /* This causes inflight precreates to abort and drop lock */
-               cfs_set_bit(oa->o_seq, &ofd->ofd_destroys_in_progress);
-               cfs_mutex_lock(&ofd->ofd_create_locks[oa->o_seq]);
-               if (!cfs_test_bit(oa->o_seq, &ofd->ofd_destroys_in_progress)) {
-                       CERROR("%s:["LPU64"] destroys_in_progress already cleared\n",
-                              exp->exp_obd->obd_name, oa->o_seq);
-                       GOTO(out, rc = 0);
-               }
-               diff = oa->o_id - ofd_last_id(ofd, oa->o_seq);
-               CDEBUG(D_HA, "ofd_last_id() = "LPU64" -> diff = %d\n",
-                      ofd_last_id(ofd, oa->o_seq), diff);
-               if (-diff > OST_MAX_PRECREATE) {
-                       /* FIXME: should reset precreate_next_id on MDS */
-                       rc = 0;
-               } else if (diff < 0) {
-                       rc = ofd_orphans_destroy(env, exp, ofd, oa);
-                       cfs_clear_bit(oa->o_seq, &ofd->ofd_destroys_in_progress);
-               } else {
-                       /* XXX: Used by MDS for the first time! */
-                       cfs_clear_bit(oa->o_seq, &ofd->ofd_destroys_in_progress);
-               }
-       } else {
-               cfs_mutex_lock(&ofd->ofd_create_locks[oa->o_seq]);
-               if (oti->oti_conn_cnt < exp->exp_conn_cnt) {
-                       CERROR("%s: dropping old precreate request\n",
-                              ofd_obd(ofd)->obd_name);
-                       GOTO(out, rc = 0);
-               }
-               /* only precreate if group == 0 and o_id is specfied */
-               if (!fid_seq_is_mdt(oa->o_seq) || oa->o_id == 0) {
-                       diff = 1; /* shouldn't we create this right now? */
-               } else {
-                       diff = oa->o_id - ofd_last_id(ofd, oa->o_seq);
-               }
+
+       mutex_lock(&oseq->os_create_lock);
+       rc = ofd_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
+       if (rc < 0) {
+               CDEBUG(D_HA, "%s: failed to acquire grant space for "
+                      "precreate (%d): rc = %d\n", ofd_name(ofd), diff, rc);
+               diff = 0;
+               GOTO(out, rc);
        }
-       if (diff > 0) {
-               obd_id next_id = ofd_last_id(ofd, oa->o_seq) + 1;
-               int i;
-
-               if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
-                   !(oa->o_flags & OBD_FL_DELORPHAN)) {
-                       /* don't enforce grant during orphan recovery */
-                       rc = ofd_grant_create(env,
-                                             ofd_obd(ofd)->obd_self_export,
-                                             &diff);
-                       if (rc) {
-                               CDEBUG(D_HA, "%s: failed to acquire grant space"
-                                      "for precreate (%d)\n",
-                                      ofd_obd(ofd)->obd_name, diff);
-                               diff = 0;
-                       }
-               }
 
-               CDEBUG(D_HA,
-                      "%s: reserve %d objects in group "LPU64" at "LPU64"\n",
-                      ofd_obd(ofd)->obd_name, diff, oa->o_seq, next_id);
-               for (i = 0; i < diff; i++) {
-                       rc = ofd_precreate_object(env, ofd, next_id + i,
-                                                 oa->o_seq);
-                       if (rc)
-                               break;
-               }
-               if (i > 0) {
-                       /* some objects got created, we can return
-                        * them, even if last creation failed */
-                       oa->o_id = ofd_last_id(ofd, oa->o_seq);
-                       rc = 0;
-               } else {
-                       CERROR("unable to precreate: %d\n", rc);
-                       oa->o_id = ofd_last_id(ofd, oa->o_seq);
-               }
+       next_id = ofd_seq_last_oid(oseq) + 1;
+       count = ofd_precreate_batch(ofd, diff);
 
+       rc = ofd_precreate_objects(env, ofd, next_id, oseq, count, 0);
+       if (rc < 0) {
+               CERROR("%s: unable to precreate: rc = %d\n",
+                      ofd_name(ofd), rc);
+       } else {
+               ostid_set_id(&oa->o_oi, ofd_seq_last_oid(oseq));
                oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
-
-               if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
-                   !(oa->o_flags & OBD_FL_DELORPHAN))
-                       ofd_grant_commit(env, ofd_obd(ofd)->obd_self_export,
-                                        rc);
+               rc = 0;
        }
 
-       ofd_info2oti(info, oti);
+       ofd_grant_commit(env, ofd_obd(ofd)->obd_self_export, rc);
 out:
-       cfs_mutex_unlock(&ofd->ofd_create_locks[oa->o_seq]);
-out_nolock:
+       mutex_unlock(&oseq->os_create_lock);
        if (rc == 0 && ea != NULL) {
                struct lov_stripe_md *lsm = *ea;
 
-               lsm->lsm_object_id = oa->o_id;
+               lsm->lsm_oi = oa->o_oi;
        }
-       return rc;
+       ofd_seq_put(env, oseq);
+
+out_sem:
+       up_read(&ofd->ofd_lastid_rwsem);
+       RETURN(rc);
 }
 
-int ofd_getattr(const struct lu_env *env, struct obd_export *exp,
-               struct obd_info *oinfo)
+/* needed by echo client only for now, RPC handler uses ofd_getattr_hdl() */
+int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp,
+                    struct obd_info *oinfo)
 {
        struct ofd_device       *ofd = ofd_exp(exp);
        struct ofd_thread_info  *info;
+       struct lu_fid           *fid = &oinfo->oi_oa->o_oi.oi_fid;
        struct ofd_object       *fo;
-       __u64                    curr_version;
        int                      rc = 0;
 
        ENTRY;
 
        info = ofd_info_init(env, exp);
 
-       fid_ostid_unpack(&info->fti_fid, &oinfo->oi_oa->o_oi, 0);
-       rc = ofd_auth_capa(exp, &info->fti_fid, oinfo->oi_oa->o_seq,
-                          oinfo_capa(oinfo), CAPA_OPC_META_READ);
-       if (rc)
-               GOTO(out, rc);
-
-       fo = ofd_object_find(env, ofd, &info->fti_fid);
+       fo = ofd_object_find_exists(env, ofd, fid);
        if (IS_ERR(fo))
                GOTO(out, rc = PTR_ERR(fo));
+
        LASSERT(fo != NULL);
        rc = ofd_attr_get(env, fo, &info->fti_attr);
        oinfo->oi_oa->o_valid = OBD_MD_FLID;
-       if (rc == 0)
+       if (rc == 0) {
+               __u64 curr_version;
+
                obdo_from_la(oinfo->oi_oa, &info->fti_attr,
                             OFD_VALID_FLAGS | LA_UID | LA_GID);
 
-       /* Store object version in reply */
-       curr_version = dt_version_get(env, ofd_object_child(fo));
-       if ((__s64)curr_version != -EOPNOTSUPP) {
-               oinfo->oi_oa->o_valid |= OBD_MD_FLDATAVERSION;
-               oinfo->oi_oa->o_data_version = curr_version;
+               /* Store object version in reply */
+               curr_version = dt_version_get(env, ofd_object_child(fo));
+               if ((__s64)curr_version != -EOPNOTSUPP) {
+                       oinfo->oi_oa->o_valid |= OBD_MD_FLDATAVERSION;
+                       oinfo->oi_oa->o_data_version = curr_version;
+               }
        }
+
        ofd_object_put(env, fo);
 out:
        RETURN(rc);
 }
 
-static int ofd_sync(const struct lu_env *env, struct obd_export *exp,
-                   struct obd_info *oinfo, obd_size start, obd_size end,
-                   struct ptlrpc_request_set *set)
+static int ofd_ioc_get_obj_version(const struct lu_env *env,
+                                  struct ofd_device *ofd, void *karg)
 {
-       struct ofd_device       *ofd = ofd_exp(exp);
-       struct ofd_thread_info  *info;
-        struct ofd_object      *fo;
-       int                      rc = 0;
+       struct obd_ioctl_data *data = karg;
+       struct lu_fid          fid;
+       struct ofd_object     *fo;
+       dt_obj_version_t       version;
+       int                    rc = 0;
 
        ENTRY;
 
-       /* if no objid is specified, it means "sync whole filesystem" */
-       if (oinfo->oi_oa == NULL || !(oinfo->oi_oa->o_valid & OBD_MD_FLID)) {
-               rc = dt_sync(env, ofd->ofd_osd);
-               GOTO(out, rc);
+       if (data->ioc_inlbuf2 == NULL || data->ioc_inllen2 != sizeof(version))
+               GOTO(out, rc = -EINVAL);
+
+       if (data->ioc_inlbuf1 != NULL && data->ioc_inllen1 == sizeof(fid)) {
+               fid = *(struct lu_fid *)data->ioc_inlbuf1;
+       } else if (data->ioc_inlbuf3 != NULL &&
+                  data->ioc_inllen3 == sizeof(__u64) &&
+                  data->ioc_inlbuf4 != NULL &&
+                  data->ioc_inllen4 == sizeof(__u64)) {
+               struct ost_id ostid;
+
+               ostid_set_seq(&ostid, *(__u64 *)data->ioc_inlbuf4);
+               ostid_set_id(&ostid, *(__u64 *)data->ioc_inlbuf3);
+               rc = ostid_to_fid(&fid, &ostid,
+                                 ofd->ofd_lut.lut_lsd.lsd_osd_index);
+               if (rc != 0)
+                       GOTO(out, rc);
+       } else {
+               GOTO(out, rc = -EINVAL);
        }
 
-       info = ofd_info_init(env, exp);
-       fid_ostid_unpack(&info->fti_fid, &oinfo->oi_oa->o_oi, 0);
+       if (!fid_is_sane(&fid))
+               GOTO(out, rc = -EINVAL);
 
-       rc = ofd_auth_capa(exp, &info->fti_fid, oinfo->oi_oa->o_seq,
-                          oinfo_capa(oinfo), CAPA_OPC_OSS_TRUNC);
-       if (rc)
-               GOTO(out, rc);
-
-       fo = ofd_object_find(env, ofd, &info->fti_fid);
-       if (IS_ERR(fo)) {
-               CERROR("%s: error finding object "DFID": rc = %ld\n",
-                      exp->exp_obd->obd_name, PFID(&info->fti_fid),
-                      PTR_ERR(fo));
+       fo = ofd_object_find(env, ofd, &fid);
+       if (IS_ERR(fo))
                GOTO(out, rc = PTR_ERR(fo));
-       }
 
-       ofd_write_lock(env, fo);
        if (!ofd_object_exists(fo))
-               GOTO(unlock, rc = -ENOENT);
+               GOTO(out_fo, rc = -ENOENT);
 
-       if (dt_version_get(env, ofd_object_child(fo)) >
-           ofd_obd(ofd)->obd_last_committed) {
-               rc = dt_object_sync(env, ofd_object_child(fo));
-               if (rc)
-                       GOTO(unlock, rc);
-       }
+       if (lu_object_remote(&fo->ofo_obj.do_lu))
+               GOTO(out_fo, rc = -EREMOTE);
 
-       oinfo->oi_oa->o_valid = OBD_MD_FLID;
-       rc = ofd_attr_get(env, fo, &info->fti_attr);
-       obdo_from_la(oinfo->oi_oa, &info->fti_attr, OFD_VALID_FLAGS);
+       version = dt_version_get(env, ofd_object_child(fo));
+       if (version == 0)
+               GOTO(out_fo, rc = -EIO);
+
+       *(dt_obj_version_t *)data->ioc_inlbuf2 = version;
 
-       ofd_counter_incr(exp, LPROC_OFD_STATS_SYNC, oinfo->oi_jobid, 1);
        EXIT;
-unlock:
-       ofd_write_unlock(env, fo);
+out_fo:
        ofd_object_put(env, fo);
 out:
        return rc;
@@ -1323,7 +1007,7 @@ int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
        ENTRY;
 
        CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
-       rc = lu_env_init(&env, LCT_LOCAL);
+       rc = lu_env_init(&env, LCT_DT_THREAD);
        if (rc)
                RETURN(rc);
 
@@ -1341,6 +1025,38 @@ int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
                if (rc == 0)
                        rc = dt_ro(&env, ofd->ofd_osd);
                break;
+       case OBD_IOC_START_LFSCK: {
+               struct obd_ioctl_data *data = karg;
+               struct lfsck_start_param lsp;
+
+               if (unlikely(data == NULL)) {
+                       rc = -EINVAL;
+                       break;
+               }
+
+               lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1);
+               lsp.lsp_index_valid = 0;
+               rc = lfsck_start(&env, ofd->ofd_osd, &lsp);
+               break;
+       }
+       case OBD_IOC_STOP_LFSCK: {
+               struct obd_ioctl_data *data = karg;
+               struct lfsck_stop      stop;
+
+               stop.ls_status = LS_STOPPED;
+               /* Old lfsck utils may pass NULL @stop. */
+               if (data->ioc_inlbuf1 == NULL)
+                       stop.ls_flags = 0;
+               else
+                       stop.ls_flags =
+                       ((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags;
+
+               rc = lfsck_stop(&env, ofd->ofd_osd, &stop);
+               break;
+       }
+       case OBD_IOC_GET_OBJ_VERSION:
+               rc = ofd_ioc_get_obj_version(&env, ofd, karg);
+               break;
        default:
                CERROR("%s: not supported cmd = %d\n", obd->obd_name, cmd);
                rc = -ENOTTY;
@@ -1396,11 +1112,11 @@ static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
                GOTO(out, rc = -EROFS);
 
 #ifdef USE_HEALTH_CHECK_WRITE
-       OBD_ALLOC(info->fti_buf.lb_buf, CFS_PAGE_SIZE);
+       OBD_ALLOC(info->fti_buf.lb_buf, PAGE_CACHE_SIZE);
        if (info->fti_buf.lb_buf == NULL)
                GOTO(out, rc = -ENOMEM);
 
-       info->fti_buf.lb_len = CFS_PAGE_SIZE;
+       info->fti_buf.lb_len = PAGE_CACHE_SIZE;
        info->fti_off = 0;
 
        th = dt_trans_create(&env, ofd->ofd_osd);
@@ -1408,7 +1124,7 @@ static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
                GOTO(out, rc = PTR_ERR(th));
 
        rc = dt_declare_record_write(&env, ofd->ofd_health_check_file,
-                                    info->fti_buf.lb_len, info->fti_off, th);
+                                    &info->fti_buf, info->fti_off, th);
        if (rc == 0) {
                th->th_sync = 1; /* sync IO is needed */
                rc = dt_trans_start_local(&env, ofd->ofd_osd, th);
@@ -1419,7 +1135,7 @@ 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, CFS_PAGE_SIZE);
+       OBD_FREE(info->fti_buf.lb_buf, PAGE_CACHE_SIZE);
 
        CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
 #endif
@@ -1428,23 +1144,6 @@ out:
        return !!rc;
 }
 
-static int ofd_obd_notify(struct obd_device *obd, struct obd_device *unused,
-                         enum obd_notify_event ev, void *data)
-{
-       switch (ev) {
-       case OBD_NOTIFY_CONFIG:
-               LASSERT(obd->obd_no_conn);
-               cfs_spin_lock(&obd->obd_dev_lock);
-               obd->obd_no_conn = 0;
-               cfs_spin_unlock(&obd->obd_dev_lock);
-               break;
-       default:
-               CDEBUG(D_INFO, "%s: Unhandled notification %#x\n",
-                      obd->obd_name, ev);
-       }
-       return 0;
-}
-
 /*
  * Handle quota control requests to consult current usage/limit.
  *
@@ -1480,24 +1179,21 @@ struct obd_ops ofd_obd_ops = {
        .o_connect              = ofd_obd_connect,
        .o_reconnect            = ofd_obd_reconnect,
        .o_disconnect           = ofd_obd_disconnect,
-       .o_set_info_async       = ofd_set_info_async,
-       .o_get_info             = ofd_get_info,
-       .o_create               = ofd_create,
+       .o_create               = ofd_echo_create,
        .o_statfs               = ofd_statfs,
-       .o_setattr              = ofd_setattr,
+       .o_setattr              = ofd_echo_setattr,
        .o_preprw               = ofd_preprw,
        .o_commitrw             = ofd_commitrw,
-       .o_destroy              = ofd_destroy,
+       .o_destroy              = ofd_echo_destroy,
        .o_init_export          = ofd_init_export,
        .o_destroy_export       = ofd_destroy_export,
        .o_postrecov            = ofd_obd_postrecov,
-       .o_punch                = ofd_punch,
-       .o_getattr              = ofd_getattr,
-       .o_sync                 = ofd_sync,
+       .o_getattr              = ofd_echo_getattr,
        .o_iocontrol            = ofd_iocontrol,
        .o_precleanup           = ofd_precleanup,
        .o_ping                 = ofd_ping,
        .o_health_check         = ofd_health_check,
-       .o_notify               = ofd_obd_notify,
        .o_quotactl             = ofd_quotactl,
+       .o_set_info_async       = ofd_set_info_async,
+       .o_get_info             = ofd_get_info,
 };