X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fofd%2Fofd_obd.c;h=a49b4903fbbb277d4eee737a126694d44c216a91;hb=52c95d51f1906d4d838dec3419e39457a8e17824;hp=2ff9c17d9004efd51ca74ac8c209255007c9ac04;hpb=4842774e71694f5e096bdc70e067aac3aec4971d;p=fs%2Flustre-release.git

diff --git a/lustre/ofd/ofd_obd.c b/lustre/ofd/ofd_obd.c
index 2ff9c17..a49b490 100644
--- a/lustre/ofd/ofd_obd.c
+++ b/lustre/ofd/ofd_obd.c
@@ -44,12 +44,85 @@
 
 #include "ofd_internal.h"
 #include <obd_cksum.h>
+#include <lquota.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			 rc, newnid = 0;
+
+	ENTRY;
+
+	if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
+		/* Self-export gets no proc entry */
+		RETURN(0);
+
+	rc = lprocfs_exp_setup(exp, client_nid, &newnid);
+	if (rc) {
+		/* Mask error for already created
+		 * /proc entries */
+		if (rc == -EALREADY)
+			rc = 0;
+		RETURN(rc);
+	}
+
+	if (newnid == 0)
+		RETURN(0);
+
+	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;
+
+	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");
+
+	rc = lprocfs_register_stats(stats->nid_proc, "stats",
+				    stats->nid_stats);
+	if (rc)
+		GOTO(clean, rc);
+
+	rc = lprocfs_nid_ldlm_stats_init(stats);
+	if (rc) {
+		lprocfs_free_stats(&stats->nid_stats);
+		GOTO(clean, rc);
+	}
+
+	RETURN(0);
+clean:
+	return rc;
+}
 
 static int ofd_parse_connect_data(const struct lu_env *env,
 				  struct obd_export *exp,
 				  struct obd_connect_data *data)
 {
-	struct ofd_device *ofd = ofd_exp(exp);
+	struct ofd_device		 *ofd = ofd_exp(exp);
+	struct filter_export_data	 *fed = &exp->exp_filter_data;
 
 	if (!data)
 		RETURN(0);
@@ -60,6 +133,17 @@ static int ofd_parse_connect_data(const struct lu_env *env,
 	       data->ocd_connect_flags, data->ocd_version,
 	       data->ocd_grant, data->ocd_index);
 
+	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",
+		      obd_export_nid2str(exp), fed->fed_group,
+		      data->ocd_group);
+		RETURN(-EPROTO);
+	}
+	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;
@@ -71,6 +155,18 @@ 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;
+	}
+
+	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_INDEX) {
 		struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
 		int		       index = lsd->lsd_ost_index;
@@ -118,7 +214,7 @@ 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();
+		data->ocd_cksum_types &= cksum_types_supported_server();
 
 		if (unlikely(data->ocd_cksum_types == 0)) {
 			CERROR("%s: Connect with checksum support but no "
@@ -148,7 +244,8 @@ 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)
 {
-	int rc;
+	struct ofd_device	*ofd = ofd_dev(obd->obd_lu_dev);
+	int			 rc;
 
 	ENTRY;
 
@@ -163,6 +260,8 @@ static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
 
 	ofd_info_init(env, exp);
 	rc = ofd_parse_connect_data(env, exp, data);
+	if (rc == 0)
+		ofd_export_stats_init(ofd, exp, localdata);
 
 	RETURN(rc);
 }
@@ -202,7 +301,6 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
 	if (rc)
 		GOTO(out, rc);
 
-	ofd_export_stats_init(ofd, exp, localdata);
 	group = data->ocd_group;
 	if (obd->obd_replayable) {
 		struct tg_export_data *ted = &exp->exp_target_data;
@@ -212,6 +310,7 @@ static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
 		rc = lut_client_new(env, exp);
 		if (rc != 0)
 			GOTO(out, rc);
+		ofd_export_stats_init(ofd, exp, localdata);
 	}
 	if (group == 0)
 		GOTO(out, rc = 0);
@@ -233,16 +332,22 @@ out:
 
 static int ofd_obd_disconnect(struct obd_export *exp)
 {
-	struct lu_env	env;
-	int		rc;
+	struct ofd_device	*ofd = ofd_dev(exp->exp_obd->obd_lu_dev);
+	struct lu_env		 env;
+	int			 rc;
 
 	ENTRY;
 
 	LASSERT(exp);
 	class_export_get(exp);
 
+	if (!(exp->exp_flags & OBD_OPT_FORCE))
+		ofd_grant_sanity_check(ofd_obd(ofd), __FUNCTION__);
+
 	rc = server_disconnect_export(exp);
 
+	ofd_grant_discard(exp);
+
 	rc = lu_env_init(&env, LCT_DT_THREAD);
 	if (rc)
 		RETURN(rc);
@@ -283,6 +388,8 @@ 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);
+
 	if (exp->exp_filter_data.fed_pending)
 		CERROR("%s: cli %s/%p has %lu pending on destroyed export"
 		       "\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
@@ -297,6 +404,23 @@ static int ofd_destroy_export(struct obd_export *exp)
 	ldlm_destroy_export(exp);
 	lut_client_free(exp);
 
+	ofd_fmd_cleanup(exp);
+
+	/*
+	 * discard grants once we're sure no more
+	 * interaction with the client is possible
+	 */
+	ofd_grant_discard(exp);
+	ofd_fmd_cleanup(exp);
+
+	if (exp->exp_connect_flags & OBD_CONNECT_GRANT_SHRINK) {
+		if (ofd->ofd_tot_granted_clients > 0)
+			ofd->ofd_tot_granted_clients --;
+	}
+
+	if (!(exp->exp_flags & OBD_OPT_FORCE))
+		ofd_grant_sanity_check(exp->exp_obd, __FUNCTION__);
+
 	LASSERT(cfs_list_empty(&exp->exp_filter_data.fed_mod_list));
 	return 0;
 }
@@ -319,6 +443,971 @@ int ofd_obd_postrecov(struct obd_device *obd)
 	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);
+
+	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));
+	RETURN(rc);
+}
+
+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;
+
+	ENTRY;
+
+	if (exp->exp_obd == NULL) {
+		CDEBUG(D_IOCTL, "invalid export %p\n", 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);
+	} else {
+		CERROR("%s: Unsupported key %s\n",
+		       exp->exp_obd->obd_name, (char*)key);
+		rc = -EOPNOTSUPP;
+	}
+
+	RETURN(rc);
+}
+
+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;
+
+	ENTRY;
+
+	if (exp->exp_obd == NULL) {
+		CDEBUG(D_IOCTL, "invalid client export %p\n", 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);
+		}
+
+		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));
+
+		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);
+	} else {
+		CERROR("Not supported key %s\n", (char*)key);
+		rc = -EOPNOTSUPP;
+	}
+
+	RETURN(rc);
+}
+
+/** helper function for statfs, also used by grant code */
+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;
+
+	cfs_spin_lock(&ofd->ofd_osfs_lock);
+	if (cfs_time_before_64(ofd->ofd_osfs_age, max_age) || max_age == 0) {
+		obd_size 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;
+		cfs_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;
+
+		cfs_spin_lock(&ofd->ofd_grant_lock);
+		cfs_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(obd_size, 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;
+		cfs_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;
+		cfs_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);
+		if (from_cache)
+			*from_cache = 1;
+	}
+	return 0;
+}
+
+static 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);
+	int			 rc;
+
+	ENTRY;
+
+	rc = ofd_statfs_internal(env, ofd, osfs, max_age, NULL);
+	if (unlikely(rc))
+		GOTO(out, rc);
+
+	/* at least try to account for cached pages.  its still racy and
+	 * 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);
+
+	osfs->os_bavail -= min_t(obd_size, osfs->os_bavail,
+				 ((ofd->ofd_tot_dirty + ofd->ofd_tot_pending +
+				   osfs->os_bsize - 1) >> ofd->ofd_blockbits));
+
+	/* 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) {
+		struct filter_export_data *fed;
+
+		fed = &obd->obd_self_export->exp_filter_data;
+		osfs->os_bavail -= min_t(obd_size, osfs->os_bavail,
+					 fed->fed_grant >> ofd->ofd_blockbits);
+	}
+
+	ofd_grant_sanity_check(obd, __FUNCTION__);
+	CDEBUG(D_CACHE, LPU64" blocks: "LPU64" free, "LPU64" avail; "
+	       LPU64" objects: "LPU64" 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_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))
+		osfs->os_ffree = 0;
+
+	/* 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)) {
+		/* 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_bsize    = 1 << COMPAT_BSIZE_SHIFT;
+	}
+
+	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)
+{
+	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 obdo		*oa = oinfo->oi_oa;
+	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);
+
+	/* 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 &&
+	    oinfo->oi_policy.l_extent.end != OBD_OBJECT_EOF) {
+		static char mdsinum[48];
+
+		if (oinfo->oi_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);
+		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);
+		GOTO(out, rc = -EPERM);
+	}
+
+	fo = ofd_object_find(env, ofd, &info->fti_fid);
+	if (IS_ERR(fo)) {
+		CERROR("%s: can't find object "DFID"\n",
+		       exp->exp_obd->obd_name, PFID(&info->fti_fid));
+		GOTO(out, rc = PTR_ERR(fo));
+	}
+
+	la_from_obdo(&info->fti_attr, oinfo->oi_oa, oinfo->oi_oa->o_valid);
+	info->fti_attr.la_valid &= ~LA_TYPE;
+
+	if (oa->o_valid & OBD_MD_FLFID) {
+		ff = &info->fti_mds_fid;
+		ofd_prepare_fidea(ff, oa);
+	}
+
+	/* setting objects attributes (including owner/group) */
+	rc = ofd_attr_set(env, fo, &info->fti_attr, ff);
+	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);
+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);
+	}
+
+	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);
+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)
+{
+	struct ofd_thread_info	*info = ofd_info(env);
+	struct lustre_handle	 lockh;
+	int			 flags = LDLM_AST_DISCARD_DATA, rc = 0;
+	ldlm_policy_data_t	 policy = {
+					.l_extent = { 0, OBD_OBJECT_EOF }
+				 };
+	struct ofd_object	*fo;
+
+	ENTRY;
+
+	/* 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);
+	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);
+
+	/* 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);
+
+	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)
+{
+	struct ofd_device	*ofd = ofd_exp(exp);
+	struct ofd_thread_info	*info;
+	obd_count		 count;
+	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++;
+	}
+
+	/* 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.
+	 */
+	if (rc == -ENOENT) {
+		if (info->fti_transno != 0)
+			rc = 0;
+	} 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;
+	}
+	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)
+{
+	struct ofd_device	*ofd = ofd_exp(exp);
+	struct ofd_thread_info	*info;
+	int			 rc = 0, diff;
+
+	ENTRY;
+
+	info = ofd_info_init(env, exp);
+	ofd_oti2info(info, oti);
+
+	LASSERT(oa->o_seq >= FID_SEQ_OST_MDT0);
+	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);
+
+	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, rc = -EINVAL);
+		}
+		/* do nothing because we create objects during first write */
+		GOTO(out, rc = 0);
+	}
+	/* 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, 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);
+		}
+	}
+	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);
+		}
+
+		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);
+	}
+
+	ofd_info2oti(info, oti);
+out:
+	cfs_mutex_unlock(&ofd->ofd_create_locks[oa->o_seq]);
+	if (rc == 0 && ea != NULL) {
+		struct lov_stripe_md *lsm = *ea;
+
+		lsm->lsm_object_id = oa->o_id;
+	}
+	return rc;
+}
+
+int ofd_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 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);
+	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)
+		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;
+	}
+	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)
+{
+	struct ofd_device	*ofd = ofd_exp(exp);
+	struct ofd_thread_info	*info;
+        struct ofd_object	*fo;
+	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);
+	}
+
+	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_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));
+		GOTO(out, rc = PTR_ERR(fo));
+	}
+
+	ofd_write_lock(env, fo);
+	if (!ofd_object_exists(fo))
+		GOTO(unlock, rc = -ENOENT);
+
+	rc = dt_object_sync(env, ofd_object_child(fo));
+	if (rc)
+		GOTO(unlock, rc);
+
+	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);
+	EXIT;
+unlock:
+	ofd_write_unlock(env, fo);
+	ofd_object_put(env, fo);
+out:
+	return rc;
+}
+
+int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
+		  void *karg, void *uarg)
+{
+	struct lu_env		 env;
+	struct ofd_device	*ofd = ofd_exp(exp);
+	struct obd_device	*obd = ofd_obd(ofd);
+	int			 rc;
+
+	ENTRY;
+
+	CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
+	rc = lu_env_init(&env, LCT_LOCAL);
+	if (rc)
+		RETURN(rc);
+
+	switch (cmd) {
+	case OBD_IOC_ABORT_RECOVERY:
+		CERROR("%s: aborting recovery\n", obd->obd_name);
+		target_stop_recovery_thread(obd);
+		break;
+	case OBD_IOC_SYNC:
+		CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name);
+		rc = dt_sync(&env, ofd->ofd_osd);
+		break;
+	case OBD_IOC_SET_READONLY:
+		rc = dt_sync(&env, ofd->ofd_osd);
+		if (rc == 0)
+			rc = dt_ro(&env, ofd->ofd_osd);
+		break;
+	default:
+		CERROR("%s: not supported cmd = %d\n", obd->obd_name, cmd);
+		rc = -ENOTTY;
+	}
+
+	lu_env_fini(&env);
+	RETURN(rc);
+}
+
+static int ofd_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
+{
+	int rc = 0;
+
+	ENTRY;
+
+	switch(stage) {
+	case OBD_CLEANUP_EARLY:
+		break;
+	case OBD_CLEANUP_EXPORTS:
+		target_cleanup_recovery(obd);
+		break;
+	}
+	RETURN(rc);
+}
+
+static int ofd_ping(const struct lu_env *env, struct obd_export *exp)
+{
+	return 0;
+}
+
+static int ofd_health_check(const struct lu_env *env, struct obd_device *obd)
+{
+	struct ofd_device	*ofd = ofd_dev(obd->obd_lu_dev);
+	struct ofd_thread_info	*info;
+#ifdef USE_HEALTH_CHECK_WRITE
+	struct thandle		*th;
+#endif
+	int			 rc = 0;
+
+	info = ofd_info_init(env, NULL);
+	rc = dt_statfs(env, ofd->ofd_osd, &info->fti_u.osfs);
+	if (unlikely(rc))
+		GOTO(out, rc);
+
+	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, CFS_PAGE_SIZE);
+	if (info->fti_buf.lb_buf == NULL)
+		GOTO(out, rc = -ENOMEM);
+
+	info->fti_buf.lb_len = CFS_PAGE_SIZE;
+	info->fti_off = 0;
+
+	th = dt_trans_create(env, ofd->ofd_osd);
+	if (IS_ERR(th))
+		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);
+	if (rc == 0) {
+		th->th_sync = 1; /* sync IO is needed */
+		rc = dt_trans_start_local(env, ofd->ofd_osd, th);
+		if (rc == 0)
+			rc = dt_record_write(env, ofd->ofd_health_check_file,
+					     &info->fti_buf, &info->fti_off,
+					     th);
+	}
+	dt_trans_stop(env, ofd->ofd_osd, th);
+
+	OBD_FREE(info->fti_buf.lb_buf, CFS_PAGE_SIZE);
+
+	CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
+#endif
+out:
+	return !!rc;
+}
+
 static int ofd_obd_notify(struct obd_device *obd, struct obd_device *unused,
 			  enum obd_notify_event ev, void *data)
 {
@@ -336,13 +1425,93 @@ static int ofd_obd_notify(struct obd_device *obd, struct obd_device *unused,
 	return 0;
 }
 
+/*
+ * Handle quotacheck requests.
+ * Although in-kernel quotacheck isn't supported any more, we still emulate it
+ * in order to interoperate with current MDT stack which needs proper
+ * quotacheck support, even for space accounting.
+ *
+ * \param obd - is the obd device associated with the ofd
+ * \param exp - is the client's export
+ * \param oqctl - is the obd_quotactl request to be processed
+ */
+static int ofd_quotacheck(struct obd_device *obd, struct obd_export *exp,
+			  struct obd_quotactl *oqctl)
+{
+	struct ptlrpc_request	*req;
+	struct obd_quotactl	*body;
+	ENTRY;
+
+	req = ptlrpc_request_alloc_pack(exp->exp_imp_reverse, &RQF_QC_CALLBACK,
+					LUSTRE_OBD_VERSION, OBD_QC_CALLBACK);
+	if (req == NULL)
+		RETURN(-ENOMEM);
+
+	body = req_capsule_client_get(&req->rq_pill, &RMF_OBD_QUOTACTL);
+	oqctl->qc_stat = 0;
+	memcpy(body, oqctl, sizeof(*body));
+
+	ptlrpc_request_set_replen(req);
+	ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+
+	RETURN(0);
+}
+
+/*
+ * Handle quota control requests to consult current usage/limit, but also
+ * to configure quota enforcement
+ *
+ * \param obd - is the obd device associated with the ofd
+ * \param exp - is the client's export
+ * \param oqctl - is the obd_quotactl request to be processed
+ */
+static int ofd_quotactl(struct obd_device *obd, struct obd_export *exp,
+			struct obd_quotactl *oqctl)
+{
+	struct ofd_device  *ofd = ofd_dev(obd->obd_lu_dev);
+	struct lu_env       env;
+	int                 rc;
+	ENTRY;
+
+	/* report success for quota on/off for interoperability with current MDT
+	 * stack */
+	if (oqctl->qc_cmd == Q_QUOTAON || oqctl->qc_cmd == Q_QUOTAOFF)
+		RETURN(0);
+
+	rc = lu_env_init(&env, LCT_DT_THREAD);
+	if (rc)
+		RETURN(rc);
+
+	rc = lquotactl_slv(&env, ofd->ofd_osd, oqctl);
+	lu_env_fini(&env);
+
+	RETURN(rc);
+}
+
 struct obd_ops ofd_obd_ops = {
 	.o_owner		= THIS_MODULE,
 	.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_statfs		= ofd_statfs,
+	.o_setattr		= ofd_setattr,
+	.o_preprw		= ofd_preprw,
+	.o_commitrw		= ofd_commitrw,
+	.o_destroy		= ofd_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_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_quotacheck		= ofd_quotacheck,
 };