X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fofd%2Fofd_io.c;h=dc5230a1f0cdf7725e149f0b5bd0ad25f2998481;hp=a67e6c72e1c976c5583fef04c5e920f2a47eaf35;hb=a29c6c7c493d0c30ee4c3046d5c7d4efa4c00b1b;hpb=c978ae6785bd9c18cecdff486fabaec405c7835f

diff --git a/lustre/ofd/ofd_io.c b/lustre/ofd/ofd_io.c
index a67e6c7..dc5230a 100644
--- a/lustre/ofd/ofd_io.c
+++ b/lustre/ofd/ofd_io.c
@@ -15,11 +15,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
  * GPL HEADER END
  */
@@ -27,7 +23,7 @@
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -35,21 +31,548 @@
  *
  * lustre/ofd/ofd_io.c
  *
- * Author: Alex Tomas <bzzz@whamcloud.com>
+ * This file provides functions to handle IO requests from clients and
+ * also LFSCK routines to check parent file identifier (PFID) consistency.
+ *
+ * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
+ * Author: Fan Yong <fan.yong@intel.com>
  */
 
 #define DEBUG_SUBSYSTEM S_FILTER
 
+#include <linux/kthread.h>
 #include "ofd_internal.h"
+#include <lustre_nodemap.h>
+
+struct ofd_inconsistency_item {
+	struct list_head	 oii_list;
+	struct ofd_object	*oii_obj;
+	struct filter_fid	 oii_ff;
+};
+
+/**
+ * Verify single object for parent FID consistency.
+ *
+ * Part of LFSCK processing which checks single object PFID stored in extended
+ * attribute (XATTR) against real FID of MDT parent object received by LFSCK.
+ * This verifies that the OST object is being referenced by only a single MDT
+ * object.
+ *
+ * \param[in] env	execution environment
+ * \param[in] ofd	OFD device
+ * \param[in] oii	object-related local data
+ * \param[in] lrl	LFSCK request data
+ */
+static void ofd_inconsistency_verify_one(const struct lu_env *env,
+					 struct ofd_device *ofd,
+					 struct ofd_inconsistency_item *oii,
+					 struct lfsck_req_local *lrl)
+{
+	struct ofd_object *fo = oii->oii_obj;
+	struct filter_fid *client_ff = &oii->oii_ff;
+	struct filter_fid *local_ff = &fo->ofo_ff;
+	int rc;
+
+	LASSERT(fo->ofo_pfid_checking);
+	LASSERT(!fo->ofo_pfid_verified);
+
+	lrl->lrl_fid = fo->ofo_header.loh_fid; /* OST-object itself FID. */
+	lrl->lrl_ff_client = *client_ff; /* client given PFID. */
+	lrl->lrl_ff_local = *local_ff; /* OST local stored PFID. */
+
+	rc = lfsck_in_notify_local(env, ofd->ofd_osd, lrl, NULL);
+	ofd_write_lock(env, fo);
+	switch (lrl->lrl_status) {
+	case LPVS_INIT:
+		LASSERT(rc <= 0);
+
+		if (rc < 0)
+			CDEBUG(D_LFSCK, "%s: fail to verify OST local stored "
+			       "PFID xattr for "DFID", the client given PFID "
+			       DFID", OST local stored PFID "DFID": rc = %d\n",
+			       ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+			       PFID(&client_ff->ff_parent),
+			       PFID(&local_ff->ff_parent), rc);
+		else
+			fo->ofo_pfid_verified = 1;
+		break;
+	case LPVS_INCONSISTENT:
+		LASSERT(rc != 0);
+
+		ofd->ofd_inconsistency_self_detected++;
+		if (rc < 0)
+			CDEBUG(D_LFSCK, "%s: fail to verify the client given "
+			       "PFID for "DFID", the client given PFID "DFID
+			       ", local stored PFID "DFID": rc = %d\n",
+			       ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+			       PFID(&client_ff->ff_parent),
+			       PFID(&local_ff->ff_parent), rc);
+		else
+			CDEBUG(D_LFSCK, "%s: both the client given PFID and "
+			       "the OST local stored PFID are stale for the "
+			       "OST-object "DFID", client given PFID is "DFID
+			       ", local stored PFID is "DFID"\n",
+			       ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+			       PFID(&client_ff->ff_parent),
+			       PFID(&local_ff->ff_parent));
+		break;
+	case LPVS_INCONSISTENT_TOFIX:
+		ofd->ofd_inconsistency_self_detected++;
+		if (rc == 0) {
+			ofd->ofd_inconsistency_self_repaired++;
+			CDEBUG(D_LFSCK, "%s: fixed the staled OST PFID xattr "
+			       "for "DFID", with the client given PFID "DFID
+			       ", the old stored PFID "DFID"\n",
+			       ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+			       PFID(&client_ff->ff_parent),
+			       PFID(&local_ff->ff_parent));
+		} else if (rc < 0) {
+			CDEBUG(D_LFSCK, "%s: fail to fix the OST PFID xattr "
+			       "for "DFID", client given PFID "DFID", local "
+			       "stored PFID "DFID": rc = %d\n",
+			       ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
+			       PFID(&client_ff->ff_parent),
+			       PFID(&local_ff->ff_parent), rc);
+		}
+		local_ff->ff_parent = client_ff->ff_parent;
+		fo->ofo_pfid_verified = 1;
+		break;
+	default:
+		break;
+	}
+	fo->ofo_pfid_checking = 0;
+	ofd_write_unlock(env, fo);
+
+	ofd_object_put(env, fo);
+	OBD_FREE_PTR(oii);
+}
+
+/**
+ * Verification thread to check parent FID consistency.
+ *
+ * Kernel thread to check consistency of parent FID for any
+ * new item added for checking by ofd_add_inconsistency_item().
+ *
+ * \param[in] args	OFD device
+ *
+ * \retval		0 on successful thread termination
+ * \retval		negative value if thread can't start
+ */
+static int ofd_inconsistency_verification_main(void *args)
+{
+	struct lu_env env;
+	struct ofd_device *ofd = args;
+	struct ptlrpc_thread *thread = &ofd->ofd_inconsistency_thread;
+	struct ofd_inconsistency_item *oii;
+	struct lfsck_req_local *lrl = NULL;
+	int rc;
+	ENTRY;
+
+	rc = lu_env_init(&env, LCT_DT_THREAD);
+	spin_lock(&ofd->ofd_inconsistency_lock);
+	thread_set_flags(thread, rc ? SVC_STOPPED : SVC_RUNNING);
+	wake_up_all(&thread->t_ctl_waitq);
+	spin_unlock(&ofd->ofd_inconsistency_lock);
+	if (rc)
+		RETURN(rc);
+
+	OBD_ALLOC_PTR(lrl);
+	if (unlikely(!lrl))
+		GOTO(out_unlocked, rc = -ENOMEM);
+
+	lrl->lrl_event = LEL_PAIRS_VERIFY_LOCAL;
+	lrl->lrl_active = LFSCK_TYPE_LAYOUT;
+
+	spin_lock(&ofd->ofd_inconsistency_lock);
+	while (1) {
+		if (unlikely(!thread_is_running(thread)))
+			break;
+
+		while (!list_empty(&ofd->ofd_inconsistency_list)) {
+			oii = list_entry(ofd->ofd_inconsistency_list.next,
+					 struct ofd_inconsistency_item,
+					 oii_list);
+			list_del_init(&oii->oii_list);
+			spin_unlock(&ofd->ofd_inconsistency_lock);
+			ofd_inconsistency_verify_one(&env, ofd, oii, lrl);
+			spin_lock(&ofd->ofd_inconsistency_lock);
+		}
+
+		spin_unlock(&ofd->ofd_inconsistency_lock);
+		wait_event_idle(thread->t_ctl_waitq,
+				!list_empty(&ofd->ofd_inconsistency_list) ||
+				!thread_is_running(thread));
+		spin_lock(&ofd->ofd_inconsistency_lock);
+	}
+
+	while (!list_empty(&ofd->ofd_inconsistency_list)) {
+		struct ofd_object *fo;
+
+		oii = list_entry(ofd->ofd_inconsistency_list.next,
+				 struct ofd_inconsistency_item,
+				 oii_list);
+		list_del_init(&oii->oii_list);
+		fo = oii->oii_obj;
+		spin_unlock(&ofd->ofd_inconsistency_lock);
+
+		ofd_write_lock(&env, fo);
+		fo->ofo_pfid_checking = 0;
+		ofd_write_unlock(&env, fo);
+
+		ofd_object_put(&env, fo);
+		OBD_FREE_PTR(oii);
+		spin_lock(&ofd->ofd_inconsistency_lock);
+	}
+
+	OBD_FREE_PTR(lrl);
+
+	GOTO(out, rc = 0);
+
+out_unlocked:
+	spin_lock(&ofd->ofd_inconsistency_lock);
+out:
+	thread_set_flags(thread, SVC_STOPPED);
+	wake_up_all(&thread->t_ctl_waitq);
+	spin_unlock(&ofd->ofd_inconsistency_lock);
+	lu_env_fini(&env);
+
+	return rc;
+}
+
+/**
+ * Start parent FID verification thread.
+ *
+ * See ofd_inconsistency_verification_main().
+ *
+ * \param[in] ofd	OFD device
+ *
+ * \retval		0 on successful start of thread
+ * \retval		negative value on error
+ */
+int ofd_start_inconsistency_verification_thread(struct ofd_device *ofd)
+{
+	struct ptlrpc_thread	*thread = &ofd->ofd_inconsistency_thread;
+	struct task_struct	*task;
+	int			 rc;
+
+	spin_lock(&ofd->ofd_inconsistency_lock);
+	if (unlikely(thread_is_running(thread))) {
+		spin_unlock(&ofd->ofd_inconsistency_lock);
+
+		return -EALREADY;
+	}
+
+	thread_set_flags(thread, 0);
+	spin_unlock(&ofd->ofd_inconsistency_lock);
+	task = kthread_run(ofd_inconsistency_verification_main, ofd,
+			   "inconsistency_verification");
+	if (IS_ERR(task)) {
+		rc = PTR_ERR(task);
+		CERROR("%s: cannot start self_repair thread: rc = %d\n",
+		       ofd_name(ofd), rc);
+	} else {
+		rc = 0;
+		wait_event_idle(thread->t_ctl_waitq,
+				thread_is_running(thread) ||
+				thread_is_stopped(thread));
+	}
+
+	return rc;
+}
+
+/**
+ * Stop parent FID verification thread.
+ *
+ * \param[in] ofd	OFD device
+ *
+ * \retval		0 on successful start of thread
+ * \retval		-EALREADY if thread is already stopped
+ */
+int ofd_stop_inconsistency_verification_thread(struct ofd_device *ofd)
+{
+	struct ptlrpc_thread	*thread = &ofd->ofd_inconsistency_thread;
+
+	spin_lock(&ofd->ofd_inconsistency_lock);
+	if (thread_is_init(thread) || thread_is_stopped(thread)) {
+		spin_unlock(&ofd->ofd_inconsistency_lock);
+
+		return -EALREADY;
+	}
+
+	thread_set_flags(thread, SVC_STOPPING);
+	spin_unlock(&ofd->ofd_inconsistency_lock);
+	wake_up_all(&thread->t_ctl_waitq);
+	wait_event_idle(thread->t_ctl_waitq,
+			thread_is_stopped(thread));
+
+	return 0;
+}
+
+/**
+ * Add new item for parent FID verification.
+ *
+ * Prepare new verification item and pass it to the dedicated
+ * verification thread for further processing.
+ *
+ * \param[in] env	execution environment
+ * \param[in] fo	OFD object
+ * \param[in] oa	OBDO structure with PFID
+ */
+static void ofd_add_inconsistency_item(const struct lu_env *env,
+				       struct ofd_object *fo, struct obdo *oa)
+{
+	struct ofd_device *ofd = ofd_obj2dev(fo);
+	struct ofd_inconsistency_item *oii;
+	struct filter_fid *ff;
+	bool wakeup = false;
+
+	OBD_ALLOC_PTR(oii);
+	if (oii == NULL)
+		return;
+
+	INIT_LIST_HEAD(&oii->oii_list);
+	lu_object_get(&fo->ofo_obj.do_lu);
+	oii->oii_obj = fo;
+	ff = &oii->oii_ff;
+	ff->ff_parent.f_seq = oa->o_parent_seq;
+	ff->ff_parent.f_oid = oa->o_parent_oid;
+	ff->ff_parent.f_stripe_idx = oa->o_stripe_idx;
+	ff->ff_layout = oa->o_layout;
+
+	spin_lock(&ofd->ofd_inconsistency_lock);
+	if (fo->ofo_pfid_checking || fo->ofo_pfid_verified) {
+		spin_unlock(&ofd->ofd_inconsistency_lock);
+		OBD_FREE_PTR(oii);
+
+		return;
+	}
+
+	fo->ofo_pfid_checking = 1;
+	if (list_empty(&ofd->ofd_inconsistency_list))
+		wakeup = true;
+	list_add_tail(&oii->oii_list, &ofd->ofd_inconsistency_list);
+	spin_unlock(&ofd->ofd_inconsistency_lock);
+	if (wakeup)
+		wake_up_all(&ofd->ofd_inconsistency_thread.t_ctl_waitq);
+
+	/* XXX: When the found inconsistency exceeds some threshold,
+	 *	we can trigger the LFSCK to scan part of the system
+	 *	or the whole system, which depends on how to define
+	 *	the threshold, a simple way maybe like that: define
+	 *	the absolute value of how many inconsisteny allowed
+	 *	to be repaired via self detect/repair mechanism, if
+	 *	exceeded, then trigger the LFSCK to scan the layout
+	 *	inconsistency within the whole system. */
+}
+
+/**
+ * Verify parent FID of an object.
+ *
+ * Check the parent FID is sane and start extended
+ * verification procedure otherwise.
+ *
+ * \param[in] env	execution environment
+ * \param[in] fo	OFD object
+ * \param[in] oa	OBDO structure with PFID
+ *
+ * \retval		0 on successful verification
+ * \retval		-EINPROGRESS if PFID is being repaired
+ * \retval		-EPERM if PFID was verified but still insane
+ */
+int ofd_verify_ff(const struct lu_env *env, struct ofd_object *fo,
+		  struct obdo *oa)
+{
+	struct lu_fid *pfid = &fo->ofo_ff.ff_parent;
+	int rc = 0;
+	ENTRY;
 
+	if (fid_is_sane(pfid)) {
+		if (likely(oa->o_parent_seq == pfid->f_seq &&
+			   oa->o_parent_oid == pfid->f_oid &&
+			   oa->o_stripe_idx == pfid->f_stripe_idx))
+			RETURN(0);
+
+		if (fo->ofo_pfid_verified)
+			RETURN(-EPERM);
+	}
+
+	/* The OST-object may be inconsistent, and we need further verification.
+	 * To avoid block the RPC service thread, return -EINPROGRESS to client
+	 * and make it retry later. */
+	if (fo->ofo_pfid_checking)
+		RETURN(-EINPROGRESS);
+
+	rc = ofd_object_ff_load(env, fo);
+	if (rc == -ENODATA)
+		RETURN(0);
+
+	if (rc < 0)
+		RETURN(rc);
+
+	if (likely(oa->o_parent_seq == pfid->f_seq &&
+		   oa->o_parent_oid == pfid->f_oid &&
+		   oa->o_stripe_idx == pfid->f_stripe_idx))
+		RETURN(0);
+
+	/* Push it to the dedicated thread for further verification. */
+	ofd_add_inconsistency_item(env, fo, oa);
+
+	RETURN(-EINPROGRESS);
+}
+
+/**
+ * FLR: verify the layout version of object.
+ *
+ * \param[in] env	execution environment
+ * \param[in] fo	OFD object
+ * \param[in] oa	OBDO structure with layout version
+ *
+ * \retval		0 on successful verification
+ * \retval		-EINPROGRESS layout version is in transfer
+ * \retval		-ESTALE the layout version on client is stale
+ */
+int ofd_verify_layout_version(const struct lu_env *env,
+			      struct ofd_object *fo, const struct obdo *oa)
+{
+	__u32 layout_version;
+	int rc;
+	ENTRY;
+
+	if (unlikely(OBD_FAIL_CHECK(OBD_FAIL_OST_SKIP_LV_CHECK)))
+		GOTO(out, rc = 0);
+
+	rc = ofd_object_ff_load(env, fo);
+	if (rc < 0) {
+		if (rc == -ENODATA)
+			rc = -EINPROGRESS;
+		GOTO(out, rc);
+	}
+
+	layout_version = fo->ofo_ff.ff_layout_version;
+	if (oa->o_layout_version >= layout_version &&
+	    oa->o_layout_version <= layout_version + fo->ofo_ff.ff_range)
+		GOTO(out, rc = 0);
+
+	/* normal traffic, decide if to return ESTALE or EINPROGRESS */
+	layout_version &= ~LU_LAYOUT_RESYNC;
+
+	/* this update is not legitimate */
+	if ((oa->o_layout_version & ~LU_LAYOUT_RESYNC) <= layout_version)
+		GOTO(out, rc = -ESTALE);
+
+	/* layout version may not be transmitted yet */
+	if ((oa->o_layout_version & ~LU_LAYOUT_RESYNC) > layout_version)
+		GOTO(out, rc = -EINPROGRESS);
+
+	EXIT;
+
+out:
+	CDEBUG(D_INODE, DFID " verify layout version: %u vs. %u/%u, rc: %d\n",
+	       PFID(lu_object_fid(&fo->ofo_obj.do_lu)),
+	       oa->o_layout_version, fo->ofo_ff.ff_layout_version,
+	       fo->ofo_ff.ff_range, rc);
+	return rc;
+
+}
+
+/*
+ * Lazy ATIME update to refresh atime every ofd_atime_diff
+ * seconds so that external scanning tool can see it actual
+ * within that period and be able to identify accessed files
+ */
+static void ofd_handle_atime(const struct lu_env *env, struct ofd_device *ofd,
+			     struct ofd_object *fo, time64_t atime)
+{
+	struct lu_attr *la;
+	struct dt_object *o;
+	struct thandle *th;
+	int rc;
+
+	if (ofd->ofd_atime_diff == 0)
+		return;
+
+	la = &ofd_info(env)->fti_attr2;
+	o = ofd_object_child(fo);
+
+	if (unlikely(fo->ofo_atime_ondisk == 0)) {
+		rc = dt_attr_get(env, o, la);
+		if (unlikely(rc))
+			return;
+		LASSERT(la->la_valid & LA_ATIME);
+		if (la->la_atime == 0)
+			la->la_atime = la->la_mtime;
+		fo->ofo_atime_ondisk = la->la_atime;
+	}
+	if (atime - fo->ofo_atime_ondisk < ofd->ofd_atime_diff)
+		return;
+
+	/* atime hasn't been updated too long, update it */
+	fo->ofo_atime_ondisk = atime;
+
+	th = ofd_trans_create(env, ofd);
+	if (IS_ERR(th)) {
+		CERROR("%s: cannot create transaction: rc = %d\n",
+		       ofd_name(ofd), (int)PTR_ERR(th));
+		return;
+	}
+
+	la->la_valid = LA_ATIME;
+	rc = dt_declare_attr_set(env, o, la, th);
+	if (rc)
+		GOTO(out_tx, rc);
+
+	rc = dt_trans_start_local(env, ofd->ofd_osd , th);
+	if (rc) {
+		CERROR("%s: cannot start transaction: rc = %d\n",
+		       ofd_name(ofd), rc);
+		GOTO(out_tx, rc);
+	}
+
+	ofd_read_lock(env, fo);
+	if (ofd_object_exists(fo)) {
+		la->la_atime = fo->ofo_atime_ondisk;
+		rc = dt_attr_set(env, o, la, th);
+	}
+
+	ofd_read_unlock(env, fo);
+
+out_tx:
+	ofd_trans_stop(env, ofd, th, rc);
+}
+
+/**
+ * Prepare buffers for read request processing.
+ *
+ * This function converts remote buffers from client to local buffers
+ * and prepares the latter.
+ *
+ * \param[in] env	execution environment
+ * \param[in] exp	OBD export of client
+ * \param[in] ofd	OFD device
+ * \param[in] fid	FID of object
+ * \param[in] la	object attributes
+ * \param[in] oa	OBDO structure from client
+ * \param[in] niocount	number of remote buffers
+ * \param[in] rnb	remote buffers
+ * \param[in] nr_local	number of local buffers
+ * \param[in] lnb	local buffers
+ * \param[in] jobid	job ID name
+ *
+ * \retval		0 on successful prepare
+ * \retval		negative value on error
+ */
 static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
-			   struct ofd_device *ofd, struct lu_fid *fid,
-			   struct lu_attr *la, int niocount,
+			   struct ofd_device *ofd, const struct lu_fid *fid,
+			   struct lu_attr *la, struct obdo *oa, int niocount,
 			   struct niobuf_remote *rnb, int *nr_local,
 			   struct niobuf_local *lnb, char *jobid)
 {
-	struct ofd_object	*fo;
-	int			 i, j, rc, tot_bytes = 0;
+	struct ofd_object *fo;
+	int i, j, rc, tot_bytes = 0;
+	enum dt_bufs_type dbt = DT_BUFS_TYPE_READ;
+	int maxlnb = *nr_local;
+	__u64 begin, end;
+	ktime_t kstart = ktime_get();
 
 	ENTRY;
 	LASSERT(env != NULL);
@@ -59,36 +582,66 @@ static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
 		RETURN(PTR_ERR(fo));
 	LASSERT(fo != NULL);
 
+	ofd_info(env)->fti_obj = fo;
+
+	if (oa->o_valid & OBD_MD_FLATIME)
+		ofd_handle_atime(env, ofd, fo, oa->o_atime);
+
 	ofd_read_lock(env, fo);
 	if (!ofd_object_exists(fo))
 		GOTO(unlock, rc = -ENOENT);
 
-	/* parse remote buffers to local buffers and prepare the latter */
-	*nr_local = 0;
-	for (i = 0, j = 0; i < niocount; i++) {
+	if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
+		rc = ofd_verify_ff(env, fo, oa);
+		if (rc != 0)
+			GOTO(unlock, rc);
+	}
+
+	if (ptlrpc_connection_is_local(exp->exp_connection))
+		dbt |= DT_BUFS_TYPE_LOCAL;
+
+	begin = -1;
+	end = 0;
+
+	for (*nr_local = 0, i = 0, j = 0; i < niocount; i++) {
+		begin = min_t(__u64, begin, rnb[i].rnb_offset);
+		end = max_t(__u64, end, rnb[i].rnb_offset + rnb[i].rnb_len);
+
+		if (OBD_FAIL_CHECK(OBD_FAIL_OST_2BIG_NIOBUF))
+			rnb[i].rnb_len = 100 * 1024 * 1024;
+
 		rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
-				 lnb + j, 0, ofd_object_capa(env, fo));
+				 lnb + j, maxlnb, dbt);
 		if (unlikely(rc < 0))
 			GOTO(buf_put, rc);
 		LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
 		/* correct index for local buffers to continue with */
 		j += rc;
 		*nr_local += rc;
+		maxlnb -= rc;
 		LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
 		tot_bytes += rnb[i].rnb_len;
 	}
 
 	LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
-	rc = dt_attr_get(env, ofd_object_child(fo), la,
-			 ofd_object_capa(env, fo));
-	if (unlikely(rc))
-		GOTO(buf_put, rc);
-
 	rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
 	if (unlikely(rc))
 		GOTO(buf_put, rc);
 
-	ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid, tot_bytes);
+	ofd_access(env, ofd,
+		&(struct lu_fid) {
+			.f_seq = oa->o_parent_seq,
+			.f_oid = oa->o_parent_oid,
+			.f_ver = oa->o_stripe_idx,
+		},
+		begin, end,
+		tot_bytes,
+		niocount,
+		READ);
+
+	ofd_counter_incr(exp, LPROC_OFD_STATS_READ_BYTES, jobid, tot_bytes);
+	ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid,
+			 ktime_us_delta(ktime_get(), kstart));
 	RETURN(0);
 
 buf_put:
@@ -99,46 +652,116 @@ unlock:
 	return rc;
 }
 
+/**
+ * Prepare buffers for write request processing.
+ *
+ * This function converts remote buffers from client to local buffers
+ * and prepares the latter. If there is recovery in progress and required
+ * object is missing then it can be re-created before write.
+ *
+ * \param[in] env	execution environment
+ * \param[in] exp	OBD export of client
+ * \param[in] ofd	OFD device
+ * \param[in] fid	FID of object
+ * \param[in] la	object attributes
+ * \param[in] oa	OBDO structure from client
+ * \param[in] objcount	always 1
+ * \param[in] obj	object data
+ * \param[in] rnb	remote buffers
+ * \param[in] nr_local	number of local buffers
+ * \param[in] lnb	local buffers
+ * \param[in] jobid	job ID name
+ *
+ * \retval		0 on successful prepare
+ * \retval		negative value on error
+ */
 static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
-			    struct ofd_device *ofd, struct lu_fid *fid,
+			    struct ofd_device *ofd, const struct lu_fid *fid,
 			    struct lu_attr *la, struct obdo *oa,
 			    int objcount, struct obd_ioobj *obj,
 			    struct niobuf_remote *rnb, int *nr_local,
 			    struct niobuf_local *lnb, char *jobid)
 {
-	struct ofd_object	*fo;
-	int			 i, j, k, rc = 0, tot_bytes = 0;
+	struct ofd_object *fo;
+	int i, j, k, rc = 0, tot_bytes = 0;
+	enum dt_bufs_type dbt = DT_BUFS_TYPE_WRITE;
+	int maxlnb = *nr_local;
+	__u64 begin, end;
+	ktime_t kstart = ktime_get();
 
 	ENTRY;
 	LASSERT(env != NULL);
 	LASSERT(objcount == 1);
 
 	if (unlikely(exp->exp_obd->obd_recovering)) {
-		struct ofd_thread_info *info = ofd_info(env);
-
-		/* copied from ofd_precreate_object */
-		/* XXX this should be consolidated to use the same code
-		 *     instead of a copy, due to the ongoing risk of bugs. */
-		memset(&info->fti_attr, 0, sizeof(info->fti_attr));
-		info->fti_attr.la_valid = LA_TYPE | LA_MODE;
-		info->fti_attr.la_mode = S_IFREG | S_ISUID | S_ISGID | 0666;
-		info->fti_attr.la_valid |= LA_ATIME | LA_MTIME | LA_CTIME;
-		/* Initialize a/c/m time so any client timestamp will always
-		 * be newer and update the inode. ctime = 0 is also handled
-		 * specially in osd_inode_setattr().  See LU-221, LU-1042 */
-		info->fti_attr.la_atime = 0;
-		info->fti_attr.la_mtime = 0;
-		info->fti_attr.la_ctime = 0;
-
-		fo = ofd_object_find_or_create(env, ofd, fid, &info->fti_attr);
-	} else {
-		fo = ofd_object_find(env, ofd, fid);
+		u64 seq = fid_seq(fid);
+		u64 oid = fid_oid(fid);
+		struct ofd_seq *oseq;
+
+		oseq = ofd_seq_load(env, ofd, seq);
+		if (IS_ERR(oseq)) {
+			CERROR("%s: Can't find FID Sequence %#llx: rc = %d\n",
+			       ofd_name(ofd), seq, (int)PTR_ERR(oseq));
+			GOTO(out, rc = -EINVAL);
+		}
+
+		if (oid > ofd_seq_last_oid(oseq)) {
+			int sync = 0;
+			int diff;
+
+			mutex_lock(&oseq->os_create_lock);
+			diff = oid - ofd_seq_last_oid(oseq);
+
+			/* Do sync create if the seq is about to used up */
+			if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
+				if (unlikely(oid >= IDIF_MAX_OID - 1))
+					sync = 1;
+			} else if (fid_seq_is_norm(seq)) {
+				if (unlikely(oid >=
+					     LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
+					sync = 1;
+			} else {
+				CERROR("%s : invalid o_seq "DOSTID"\n",
+				       ofd_name(ofd), POSTID(&oa->o_oi));
+				mutex_unlock(&oseq->os_create_lock);
+				ofd_seq_put(env, oseq);
+				GOTO(out, rc = -EINVAL);
+			}
+
+			while (diff > 0) {
+				u64 next_id = ofd_seq_last_oid(oseq) + 1;
+				int count = ofd_precreate_batch(ofd, diff);
+
+				rc = ofd_precreate_objects(env, ofd, next_id,
+							   oseq, count, sync);
+				if (rc < 0) {
+					mutex_unlock(&oseq->os_create_lock);
+					ofd_seq_put(env, oseq);
+					GOTO(out, rc);
+				}
+
+				diff -= rc;
+			}
+
+			mutex_unlock(&oseq->os_create_lock);
+		}
+
+		ofd_seq_put(env, oseq);
 	}
 
+	/* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
+	 * space back if possible, we have to do this outside of the lock as
+	 * grant preparation may need to sync whole fs thus wait for all the
+	 * transactions to complete. */
+	tgt_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
+
+	fo = ofd_object_find(env, ofd, fid);
 	if (IS_ERR(fo))
 		GOTO(out, rc = PTR_ERR(fo));
 	LASSERT(fo != NULL);
 
+	ofd_info(env)->fti_obj = fo;
+
 	ofd_read_lock(env, fo);
 	if (!ofd_object_exists(fo)) {
 		CERROR("%s: BRW to missing obj "DOSTID"\n",
@@ -148,30 +771,55 @@ static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
 		GOTO(out, rc = -ENOENT);
 	}
 
-	/* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
-	 * space back if possible */
-	ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
+	if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
+		rc = ofd_verify_ff(env, fo, oa);
+		if (rc != 0) {
+			ofd_read_unlock(env, fo);
+			ofd_object_put(env, fo);
+			GOTO(out, rc);
+		}
+	}
+
+	/* need to verify layout version */
+	if (oa->o_valid & OBD_MD_LAYOUT_VERSION) {
+		rc = ofd_verify_layout_version(env, fo, oa);
+		if (rc) {
+			ofd_read_unlock(env, fo);
+			ofd_object_put(env, fo);
+			GOTO(out, rc);
+		}
+
+		oa->o_valid &= ~OBD_MD_LAYOUT_VERSION;
+	}
+
+	if (ptlrpc_connection_is_local(exp->exp_connection))
+		dbt |= DT_BUFS_TYPE_LOCAL;
+
+	begin = -1;
+	end = 0;
 
 	/* parse remote buffers to local buffers and prepare the latter */
-	*nr_local = 0;
-	for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
+	for (*nr_local = 0, i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
+		begin = min_t(__u64, begin, rnb[i].rnb_offset);
+		end = max_t(__u64, end, rnb[i].rnb_offset + rnb[i].rnb_len);
+
+		if (OBD_FAIL_CHECK(OBD_FAIL_OST_2BIG_NIOBUF))
+			rnb[i].rnb_len += PAGE_SIZE;
 		rc = dt_bufs_get(env, ofd_object_child(fo),
-				 rnb + i, lnb + j, 1,
-				 ofd_object_capa(env, fo));
+				 rnb + i, lnb + j, maxlnb, dbt);
 		if (unlikely(rc < 0))
 			GOTO(err, rc);
 		LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
 		/* correct index for local buffers to continue with */
 		for (k = 0; k < rc; k++) {
 			lnb[j+k].lnb_flags = rnb[i].rnb_flags;
+			lnb[j+k].lnb_flags &= ~OBD_BRW_LOCALS;
 			if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
 				lnb[j+k].lnb_rc = -ENOSPC;
-			/* remote client can't break through quota */
-			if (exp_connect_rmtclient(exp))
-				lnb[j+k].lnb_flags &= ~OBD_BRW_NOQUOTA;
 		}
 		j += rc;
 		*nr_local += rc;
+		maxlnb -= rc;
 		LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
 		tot_bytes += rnb[i].rnb_len;
 	}
@@ -181,46 +829,77 @@ static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
 	if (unlikely(rc != 0))
 		GOTO(err, rc);
 
-	ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
+	ofd_read_unlock(env, fo);
+
+	ofd_access(env, ofd,
+		&(struct lu_fid) {
+			.f_seq = oa->o_parent_seq,
+			.f_oid = oa->o_parent_oid,
+			.f_ver = oa->o_stripe_idx,
+		},
+		begin, end,
+		tot_bytes,
+		obj->ioo_bufcnt,
+		WRITE);
+
+	ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE_BYTES, jobid, tot_bytes);
+	ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid,
+			 ktime_us_delta(ktime_get(), kstart));
 	RETURN(0);
 err:
 	dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
 	ofd_read_unlock(env, fo);
-	/* ofd_grant_prepare_write() was called, so we must commit */
-	ofd_grant_commit(env, exp, rc);
+	ofd_object_put(env, fo);
+	/* tgt_grant_prepare_write() was called, so we must commit */
+	tgt_grant_commit(exp, oa->o_grant_used, rc);
 out:
 	/* let's still process incoming grant information packed in the oa,
 	 * but without enforcing grant since we won't proceed with the write.
 	 * Just like a read request actually. */
-	ofd_grant_prepare_read(env, exp, oa);
+	tgt_grant_prepare_read(env, exp, oa);
 	return rc;
 }
 
+/**
+ * Prepare bulk IO requests for processing.
+ *
+ * This function does initial checks of IO and calls corresponding
+ * functions for read/write processing.
+ *
+ * \param[in] env	execution environment
+ * \param[in] cmd	IO type (read/write)
+ * \param[in] exp	OBD export of client
+ * \param[in] oa	OBDO structure from request
+ * \param[in] objcount	always 1
+ * \param[in] obj	object data
+ * \param[in] rnb	remote buffers
+ * \param[in] nr_local	number of local buffers
+ * \param[in] lnb	local buffers
+ *
+ * \retval		0 on successful prepare
+ * \retval		negative value on error
+ */
 int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
 	       struct obdo *oa, int objcount, struct obd_ioobj *obj,
 	       struct niobuf_remote *rnb, int *nr_local,
-	       struct niobuf_local *lnb, struct obd_trans_info *oti,
-	       struct lustre_capa *capa)
+	       struct niobuf_local *lnb)
 {
 	struct tgt_session_info	*tsi = tgt_ses_info(env);
 	struct ofd_device	*ofd = ofd_exp(exp);
 	struct ofd_thread_info	*info;
 	char			*jobid;
+	const struct lu_fid	*fid = &oa->o_oi.oi_fid;
 	int			 rc = 0;
 
 	if (*nr_local > PTLRPC_MAX_BRW_PAGES) {
-		CERROR("%s: bulk has too many pages %d, which exceeds the"
-		       "maximum pages per RPC of %d\n",
+		CERROR("%s: bulk has too many pages %d, which exceeds the maximum pages per RPC of %d\n",
 		       exp->exp_obd->obd_name, *nr_local, PTLRPC_MAX_BRW_PAGES);
 		RETURN(-EPROTO);
 	}
 
 	if (tgt_ses_req(tsi) == NULL) { /* echo client case */
-		LASSERT(oti != NULL);
-		lu_env_refill((struct lu_env *)env);
 		info = ofd_info_init(env, exp);
-		ofd_oti2info(info, oti);
-		jobid = oti->oti_jobid;
+		jobid = NULL;
 	} else {
 		info = tsi2ofd_info(tsi);
 		jobid = tsi->tsi_jobid;
@@ -228,7 +907,7 @@ int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
 
 	LASSERT(oa != NULL);
 
-	if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT)) {
+	if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT)) {
 		struct ofd_seq		*oseq;
 
 		oseq = ofd_seq_load(env, ofd, ostid_seq(&oa->o_oi));
@@ -252,29 +931,15 @@ int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
 	LASSERT(objcount == 1);
 	LASSERT(obj->ioo_bufcnt > 0);
 
-	rc = ostid_to_fid(&info->fti_fid, &oa->o_oi, 0);
-	if (unlikely(rc != 0))
-		RETURN(rc);
-
 	if (cmd == OBD_BRW_WRITE) {
-		rc = ofd_auth_capa(exp, &info->fti_fid, ostid_seq(&oa->o_oi),
-				   capa, CAPA_OPC_OSS_WRITE);
-		if (rc == 0) {
-			la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
-			rc = ofd_preprw_write(env, exp, ofd, &info->fti_fid,
-					      &info->fti_attr, oa, objcount,
-					      obj, rnb, nr_local, lnb, jobid);
-		}
+		la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
+		rc = ofd_preprw_write(env, exp, ofd, fid, &info->fti_attr, oa,
+				      objcount, obj, rnb, nr_local, lnb, jobid);
 	} else if (cmd == OBD_BRW_READ) {
-		rc = ofd_auth_capa(exp, &info->fti_fid, ostid_seq(&oa->o_oi),
-				   capa, CAPA_OPC_OSS_READ);
-		if (rc == 0) {
-			ofd_grant_prepare_read(env, exp, oa);
-			rc = ofd_preprw_read(env, exp, ofd, &info->fti_fid,
-					     &info->fti_attr, obj->ioo_bufcnt,
-					     rnb, nr_local, lnb, jobid);
-			obdo_from_la(oa, &info->fti_attr, LA_ATIME);
-		}
+		tgt_grant_prepare_read(env, exp, oa);
+		rc = ofd_preprw_read(env, exp, ofd, fid, &info->fti_attr, oa,
+				     obj->ioo_bufcnt, rnb, nr_local, lnb,
+				     jobid);
 	} else {
 		CERROR("%s: wrong cmd %d received!\n",
 		       exp->exp_obd->obd_name, cmd);
@@ -283,9 +948,24 @@ int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
 	RETURN(rc);
 }
 
+/**
+ * Drop reference on local buffers for read bulk IO.
+ *
+ * This will free all local buffers use by this read request.
+ *
+ * \param[in] env	execution environment
+ * \param[in] ofd	OFD device
+ * \param[in] fid	object FID
+ * \param[in] objcount	always 1
+ * \param[in] niocount	number of local buffers
+ * \param[in] lnb	local buffers
+ *
+ * \retval		0 on successful execution
+ * \retval		negative value on error
+ */
 static int
 ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
-		  struct lu_fid *fid, int objcount, int niocount,
+		  const struct lu_fid *fid, int objcount, int niocount,
 		  struct niobuf_local *lnb)
 {
 	struct ofd_object *fo;
@@ -294,32 +974,44 @@ ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
 
 	LASSERT(niocount > 0);
 
-	fo = ofd_object_find(env, ofd, fid);
-	if (IS_ERR(fo))
-		RETURN(PTR_ERR(fo));
+	fo = ofd_info(env)->fti_obj;
 	LASSERT(fo != NULL);
 	LASSERT(ofd_object_exists(fo));
 	dt_bufs_put(env, ofd_object_child(fo), lnb, niocount);
 
 	ofd_read_unlock(env, fo);
 	ofd_object_put(env, fo);
-	/* second put is pair to object_get in ofd_preprw_read */
-	ofd_object_put(env, fo);
 
 	RETURN(0);
 }
 
+/**
+ * Set attributes of object during write bulk IO processing.
+ *
+ * Change object attributes and write parent FID into extended
+ * attributes when needed.
+ *
+ * \param[in] env	execution environment
+ * \param[in] ofd	OFD device
+ * \param[in] ofd_obj	OFD object
+ * \param[in] la	object attributes
+ * \param[in] oa	obdo
+ *
+ * \retval		0 on successful attributes update
+ * \retval		negative value on error
+ */
 static int
 ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
 		   struct ofd_object *ofd_obj, struct lu_attr *la,
-		   struct filter_fid *ff)
+		   struct obdo *oa)
 {
 	struct ofd_thread_info	*info = ofd_info(env);
+	struct filter_fid	*ff = &info->fti_mds_fid;
 	__u64			 valid = la->la_valid;
-	int			 rc;
 	struct thandle		*th;
 	struct dt_object	*dt_obj;
-	int			 ff_needed = 0;
+	int			 fl = 0;
+	int			 rc;
 
 	ENTRY;
 
@@ -328,21 +1020,14 @@ ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
 	dt_obj = ofd_object_child(ofd_obj);
 	LASSERT(dt_obj != NULL);
 
-	la->la_valid &= LA_UID | LA_GID;
+	la->la_valid &= LA_UID | LA_GID | LA_PROJID;
 
-	rc = ofd_attr_handle_ugid(env, ofd_obj, la, 0 /* !is_setattr */);
+	rc = ofd_attr_handle_id(env, ofd_obj, la, 0 /* !is_setattr */);
 	if (rc != 0)
 		GOTO(out, rc);
 
-	if (ff != NULL) {
-		rc = ofd_object_ff_check(env, ofd_obj);
-		if (rc == -ENODATA)
-			ff_needed = 1;
-		else if (rc < 0)
-			GOTO(out, rc);
-	}
-
-	if (!la->la_valid && !ff_needed)
+	if (!la->la_valid && !(oa->o_valid &
+	    (OBD_MD_FLFID | OBD_MD_FLOSTLAYOUT | OBD_MD_LAYOUT_VERSION)))
 		/* no attributes to set */
 		GOTO(out, rc = 0);
 
@@ -356,38 +1041,66 @@ ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
 			GOTO(out_tx, rc);
 	}
 
-	if (ff_needed) {
-		info->fti_buf.lb_buf = ff;
-		info->fti_buf.lb_len = sizeof(*ff);
+	if (oa->o_valid & (OBD_MD_FLFID | OBD_MD_FLOSTLAYOUT |
+			   OBD_MD_LAYOUT_VERSION)) {
 		rc = dt_declare_xattr_set(env, dt_obj, &info->fti_buf,
 					  XATTR_NAME_FID, 0, th);
 		if (rc)
 			GOTO(out_tx, rc);
 	}
-
 	/* We don't need a transno for this operation which will be re-executed
 	 * anyway when the OST_WRITE (with a transno assigned) is replayed */
 	rc = dt_trans_start_local(env, ofd->ofd_osd , th);
 	if (rc)
 		GOTO(out_tx, rc);
 
-	/* set uid/gid */
-	if (la->la_valid) {
-		rc = dt_attr_set(env, dt_obj, la, th,
-				 ofd_object_capa(env, ofd_obj));
-		if (rc)
-			GOTO(out_tx, rc);
-	}
+	ofd_read_lock(env, ofd_obj);
+
+	rc = ofd_attr_handle_id(env, ofd_obj, la, 0 /* !is_setattr */);
+	if (rc != 0)
+		GOTO(out_unlock, rc);
+
+	if (!la->la_valid && !(oa->o_valid &
+	    (OBD_MD_FLFID | OBD_MD_FLOSTLAYOUT | OBD_MD_LAYOUT_VERSION)))
+		/* no attributes to set */
+		GOTO(out_unlock, rc = 0);
 
-	/* set filter fid EA */
-	if (ff_needed) {
-		rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
-				  0, th, BYPASS_CAPA);
+
+
+	/* set uid/gid/projid */
+	if (la->la_valid) {
+		rc = dt_attr_set(env, dt_obj, la, th);
 		if (rc)
-			GOTO(out_tx, rc);
+			GOTO(out_unlock, rc);
 	}
 
-	EXIT;
+	fl = ofd_object_ff_update(env, ofd_obj, oa, ff);
+	if (fl <= 0)
+		GOTO(out_unlock, rc = fl);
+
+	/* set filter fid EA.
+	 * FIXME: it holds read lock of ofd object to modify the XATTR_NAME_FID
+	 * while the write lock should be held. However, it should work because
+	 * write RPCs only modify ff_{parent,layout} and those information will
+	 * be the same from all the write RPCs. The reason that fl is not used
+	 * in dt_xattr_set() is to allow this race. */
+	if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NOPFID))
+		GOTO(out_unlock, rc);
+	if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR1))
+		ff->ff_parent.f_oid = cpu_to_le32(1UL << 31);
+	else if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR2))
+		le32_add_cpu(&ff->ff_parent.f_oid, -1);
+
+	info->fti_buf.lb_buf = ff;
+	info->fti_buf.lb_len = sizeof(*ff);
+	rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID, 0, th);
+	if (rc == 0)
+		filter_fid_le_to_cpu(&ofd_obj->ofo_ff, ff, sizeof(*ff));
+
+	GOTO(out_unlock, rc);
+
+out_unlock:
+	ofd_read_unlock(env, ofd_obj);
 out_tx:
 	dt_trans_stop(env, ofd->ofd_osd, th);
 out:
@@ -395,33 +1108,133 @@ out:
 	return rc;
 }
 
+struct ofd_soft_sync_callback {
+	struct dt_txn_commit_cb	 ossc_cb;
+	struct obd_export	*ossc_exp;
+};
+
+/**
+ * Callback function for "soft sync" update.
+ *
+ * Reset fed_soft_sync_count upon committing the "soft_sync" update.
+ * See ofd_soft_sync_cb_add() below for more details on soft sync.
+ *
+ * \param[in] env	execution environment
+ * \param[in] th	transaction handle
+ * \param[in] cb	callback data
+ * \param[in] err	error code
+ */
+static void ofd_cb_soft_sync(struct lu_env *env, struct thandle *th,
+			     struct dt_txn_commit_cb *cb, int err)
+{
+	struct ofd_soft_sync_callback	*ossc;
+
+	ossc = container_of(cb, struct ofd_soft_sync_callback, ossc_cb);
+
+	CDEBUG(D_INODE, "export %p soft sync count is reset\n", ossc->ossc_exp);
+	atomic_set(&ossc->ossc_exp->exp_filter_data.fed_soft_sync_count, 0);
+
+	class_export_cb_put(ossc->ossc_exp);
+	OBD_FREE_PTR(ossc);
+}
+
+/**
+ * Add callback for "soft sync" processing.
+ *
+ * The "soft sync" mechanism does asynchronous commit when OBD_BRW_SOFT_SYNC
+ * flag is set in client buffers. The intention is for this operation to
+ * commit pages belonging to a client which has "too many" outstanding
+ * unstable pages in its cache. See LU-2139 for details.
+ *
+ * This function adds callback to be called when commit is done.
+ *
+ * \param[in] th	transaction handle
+ * \param[in] exp	OBD export of client
+ *
+ * \retval		0 on successful callback adding
+ * \retval		negative value on error
+ */
+static int ofd_soft_sync_cb_add(struct thandle *th, struct obd_export *exp)
+{
+	struct ofd_soft_sync_callback		*ossc;
+	struct dt_txn_commit_cb			*dcb;
+	int					 rc;
+
+	OBD_ALLOC_PTR(ossc);
+	if (ossc == NULL)
+		return -ENOMEM;
+
+	ossc->ossc_exp = class_export_cb_get(exp);
+
+	dcb = &ossc->ossc_cb;
+	dcb->dcb_func = ofd_cb_soft_sync;
+	INIT_LIST_HEAD(&dcb->dcb_linkage);
+	strlcpy(dcb->dcb_name, "ofd_cb_soft_sync", sizeof(dcb->dcb_name));
+
+	rc = dt_trans_cb_add(th, dcb);
+	if (rc) {
+		class_export_cb_put(exp);
+		OBD_FREE_PTR(ossc);
+	}
+
+	return rc;
+}
+
+/**
+ * Commit bulk IO buffers to the storage.
+ *
+ * This function finalizes write IO processing by writing data to the disk.
+ * That write can be synchronous or asynchronous depending on buffers flags.
+ *
+ * \param[in] env	execution environment
+ * \param[in] exp	OBD export of client
+ * \param[in] ofd	OFD device
+ * \param[in] fid	FID of object
+ * \param[in] la	object attributes
+ * \param[in] ff	parent FID of object
+ * \param[in] objcount	always 1
+ * \param[in] niocount	number of local buffers
+ * \param[in] lnb	local buffers
+ * \param[in] granted	grant space consumed for the bulk I/O
+ * \param[in] old_rc	result of processing at this point
+ *
+ * \retval		0 on successful commit
+ * \retval		negative value on error
+ */
 static int
-ofd_commitrw_write(const struct lu_env *env, struct ofd_device *ofd,
-		   struct lu_fid *fid, struct lu_attr *la,
-		   struct filter_fid *ff, int objcount,
-		   int niocount, struct niobuf_local *lnb, int old_rc)
+ofd_commitrw_write(const struct lu_env *env, struct obd_export *exp,
+		   struct ofd_device *ofd, const struct lu_fid *fid,
+		   struct lu_attr *la, struct obdo *oa, int objcount,
+		   int niocount, struct niobuf_local *lnb,
+		   unsigned long granted, int old_rc)
 {
-	struct ofd_thread_info	*info = ofd_info(env);
-	struct ofd_object	*fo;
-	struct dt_object	*o;
-	struct thandle		*th;
-	int			 rc = 0;
-	int			 retries = 0;
-	int			 i;
+	struct ofd_thread_info *info = ofd_info(env);
+	struct filter_export_data *fed = &exp->exp_filter_data;
+	struct ofd_object *fo;
+	struct dt_object *o;
+	struct thandle *th;
+	int rc = 0;
+	int rc2 = 0;
+	int retries = 0;
+	int i;
+	bool soft_sync = false;
+	bool cb_registered = false;
+	bool fake_write = false;
 
 	ENTRY;
 
 	LASSERT(objcount == 1);
 
-	fo = ofd_object_find(env, ofd, fid);
+	fo = ofd_info(env)->fti_obj;
 	LASSERT(fo != NULL);
-	LASSERT(ofd_object_exists(fo));
 
 	o = ofd_object_child(fo);
 	LASSERT(o != NULL);
 
 	if (old_rc)
 		GOTO(out, rc = old_rc);
+	if (!ofd_object_exists(fo))
+		GOTO(out, rc = -ENOENT);
 
 	/*
 	 * The first write to each object must set some attributes.  It is
@@ -429,33 +1242,63 @@ ofd_commitrw_write(const struct lu_env *env, struct ofd_device *ofd,
 	 * dt_declare_write_commit() since quota enforcement is now handled in
 	 * declare phases.
 	 */
-	rc = ofd_write_attr_set(env, ofd, fo, la, ff);
+	rc = ofd_write_attr_set(env, ofd, fo, la, oa);
 	if (rc)
 		GOTO(out, rc);
 
 	la->la_valid &= LA_ATIME | LA_MTIME | LA_CTIME;
 
+	/* do fake write, to simulate the write case for performance testing */
+	if (OBD_FAIL_CHECK(OBD_FAIL_OST_FAKE_RW)) {
+		struct niobuf_local *last = &lnb[niocount - 1];
+		__u64 file_size = last->lnb_file_offset + last->lnb_len;
+		__u64 valid = la->la_valid;
+
+		la->la_valid = LA_SIZE;
+		la->la_size = 0;
+		rc = dt_attr_get(env, o, la);
+		if (rc < 0 && rc != -ENOENT)
+			GOTO(out, rc);
+
+		if (file_size < la->la_size)
+			file_size = la->la_size;
+
+		/* dirty inode by setting file size */
+		la->la_valid = valid | LA_SIZE;
+		la->la_size = file_size;
+
+		fake_write = true;
+	}
+
 retry:
 	th = ofd_trans_create(env, ofd);
 	if (IS_ERR(th))
 		GOTO(out, rc = PTR_ERR(th));
 
-	th->th_sync |= ofd->ofd_syncjournal;
+	th->th_sync |= ofd->ofd_sync_journal;
 	if (th->th_sync == 0) {
 		for (i = 0; i < niocount; i++) {
 			if (!(lnb[i].lnb_flags & OBD_BRW_ASYNC)) {
 				th->th_sync = 1;
 				break;
 			}
+			if (lnb[i].lnb_flags & OBD_BRW_SOFT_SYNC)
+				soft_sync = true;
 		}
 	}
 
 	if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET))
 		GOTO(out_stop, rc = -EINPROGRESS);
 
-	rc = dt_declare_write_commit(env, o, lnb, niocount, th);
-	if (rc)
-		GOTO(out_stop, rc);
+	if (likely(!fake_write)) {
+		rc = dt_declare_write_commit(env, o, lnb, niocount, th);
+		if (rc)
+			GOTO(out_stop, rc);
+	}
+
+	/* don't update atime on disk if it is older */
+	if (la->la_valid & LA_ATIME && la->la_atime <= fo->ofo_atime_ondisk)
+		la->la_valid &= ~LA_ATIME;
 
 	if (la->la_valid) {
 		/* update [mac]time if needed */
@@ -468,89 +1311,128 @@ retry:
 	if (rc)
 		GOTO(out_stop, rc);
 
-	rc = dt_write_commit(env, o, lnb, niocount, th);
-	if (rc)
-		GOTO(out_stop, rc);
+	ofd_read_lock(env, fo);
+	if (!ofd_object_exists(fo))
+		GOTO(out_unlock, rc = -ENOENT);
 
-	if (la->la_valid) {
-		rc = dt_attr_set(env, o, la, th, ofd_object_capa(env, fo));
+	if (likely(!fake_write)) {
+		OBD_FAIL_TIMEOUT_ORSET(OBD_FAIL_OST_WR_ATTR_DELAY,
+				       OBD_FAIL_ONCE, cfs_fail_val);
+		rc = dt_write_commit(env, o, lnb, niocount, th, oa->o_size);
 		if (rc)
-			GOTO(out_stop, rc);
+			GOTO(out_unlock, rc);
+	}
+
+	/* Don't update timestamps if this write is older than a
+	 * setattr which modifies the timestamps. b=10150 */
+	if (la->la_valid && tgt_fmd_check(exp, fid, info->fti_xid)) {
+		rc = dt_attr_set(env, o, la, th);
+		if (rc)
+			GOTO(out_unlock, rc);
+		if (la->la_valid & LA_ATIME)
+			fo->ofo_atime_ondisk = la->la_atime;
 	}
 
 	/* get attr to return */
-	rc = dt_attr_get(env, o, la, ofd_object_capa(env, fo));
+	rc = dt_attr_get(env, o, la);
 
+out_unlock:
+	ofd_read_unlock(env, fo);
 out_stop:
 	/* Force commit to make the just-deleted blocks
 	 * reusable. LU-456 */
 	if (rc == -ENOSPC)
 		th->th_sync = 1;
 
-	ofd_trans_stop(env, ofd, th, rc);
+	/* do this before trans stop in case commit has finished */
+	if (!th->th_sync && soft_sync && !cb_registered) {
+		ofd_soft_sync_cb_add(th, exp);
+		cb_registered = true;
+	}
+
+	if (rc == 0 && granted > 0) {
+		if (tgt_grant_commit_cb_add(th, exp, granted) == 0)
+			granted = 0;
+	}
+
+	rc2 = ofd_trans_stop(env, ofd, th, rc);
+	if (!rc)
+		rc = rc2;
 	if (rc == -ENOSPC && retries++ < 3) {
 		CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
 		       retries);
 		goto retry;
 	}
 
+	if (!soft_sync)
+		/* reset fed_soft_sync_count upon non-SOFT_SYNC RPC */
+		atomic_set(&fed->fed_soft_sync_count, 0);
+	else if (atomic_inc_return(&fed->fed_soft_sync_count) ==
+		 ofd->ofd_soft_sync_limit)
+		dt_commit_async(env, ofd->ofd_osd);
+
 out:
 	dt_bufs_put(env, o, lnb, niocount);
-	ofd_read_unlock(env, fo);
-	ofd_object_put(env, fo);
-	/* second put is pair to object_get in ofd_preprw_write */
 	ofd_object_put(env, fo);
-	ofd_grant_commit(env, info->fti_exp, old_rc);
+	if (granted > 0)
+		tgt_grant_commit(exp, granted, old_rc);
 	RETURN(rc);
 }
 
+/**
+ * Commit bulk IO to the storage.
+ *
+ * This is companion function to the ofd_preprw(). It finishes bulk IO
+ * request processing by committing buffers to the storage (WRITE) and/or
+ * freeing those buffers (read/write). See ofd_commitrw_read() and
+ * ofd_commitrw_write() for details about each type of IO.
+ *
+ * \param[in] env	execution environment
+ * \param[in] cmd	IO type (READ/WRITE)
+ * \param[in] exp	OBD export of client
+ * \param[in] oa	OBDO structure from client
+ * \param[in] objcount	always 1
+ * \param[in] obj	object data
+ * \param[in] rnb	remote buffers
+ * \param[in] npages	number of local buffers
+ * \param[in] lnb	local buffers
+ * \param[in] old_rc	result of processing at this point
+ *
+ * \retval		0 on successful commit
+ * \retval		negative value on error
+ */
 int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
 		 struct obdo *oa, int objcount, struct obd_ioobj *obj,
 		 struct niobuf_remote *rnb, int npages,
-		 struct niobuf_local *lnb, struct obd_trans_info *oti,
-		 int old_rc)
+		 struct niobuf_local *lnb, int old_rc)
 {
-	struct ofd_thread_info	*info = ofd_info(env);
-	struct ofd_mod_data	*fmd;
-	__u64			 valid;
-	struct ofd_device	*ofd = ofd_exp(exp);
-	struct filter_fid	*ff = NULL;
-	int			 rc = 0;
+	struct ofd_thread_info *info = ofd_info(env);
+	struct ofd_device *ofd = ofd_exp(exp);
+	const struct lu_fid *fid = &oa->o_oi.oi_fid;
+	struct ldlm_namespace *ns = ofd->ofd_namespace;
+	struct ldlm_resource *rs = NULL;
+	__u64 valid;
+	int rc = 0;
 
 	LASSERT(npages > 0);
 
-	rc = ostid_to_fid(&info->fti_fid, &oa->o_oi, 0);
-	if (unlikely(rc != 0))
-		RETURN(rc);
 	if (cmd == OBD_BRW_WRITE) {
-		/* Don't update timestamps if this write is older than a
-		 * setattr which modifies the timestamps. b=10150 */
-
-		/* XXX when we start having persistent reservations this needs
-		 * to be changed to ofd_fmd_get() to create the fmd if it
-		 * doesn't already exist so we can store the reservation handle
-		 * there. */
-		valid = OBD_MD_FLUID | OBD_MD_FLGID;
-		fmd = ofd_fmd_find(exp, &info->fti_fid);
-		if (!fmd || fmd->fmd_mactime_xid < info->fti_xid)
-			valid |= OBD_MD_FLATIME | OBD_MD_FLMTIME |
-				 OBD_MD_FLCTIME;
-		ofd_fmd_put(exp, fmd);
-		la_from_obdo(&info->fti_attr, oa, valid);
+		struct lu_nodemap *nodemap;
 
-		if (oa->o_valid & OBD_MD_FLFID) {
-			ff = &info->fti_mds_fid;
-			ofd_prepare_fidea(ff, oa);
-		}
+		valid = OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLPROJID |
+			OBD_MD_FLATIME | OBD_MD_FLMTIME | OBD_MD_FLCTIME;
+		la_from_obdo(&info->fti_attr, oa, valid);
 
-		rc = ofd_commitrw_write(env, ofd, &info->fti_fid,
-					&info->fti_attr, ff, objcount, npages,
-					lnb, old_rc);
+		rc = ofd_commitrw_write(env, exp, ofd, fid, &info->fti_attr,
+					oa, objcount, npages, lnb,
+					oa->o_grant_used, old_rc);
 		if (rc == 0)
 			obdo_from_la(oa, &info->fti_attr,
-				     OFD_VALID_FLAGS | LA_GID | LA_UID);
+				     OFD_VALID_FLAGS | LA_GID | LA_UID |
+				     LA_PROJID);
 		else
-			obdo_from_la(oa, &info->fti_attr, LA_GID | LA_UID);
+			obdo_from_la(oa, &info->fti_attr, LA_GID | LA_UID |
+				     LA_PROJID);
 
 		/* don't report overquota flag if we failed before reaching
 		 * commit */
@@ -569,28 +1451,49 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
 				else
 					oa->o_flags = OBD_FL_NO_GRPQUOTA;
 			}
+			if (lnb[0].lnb_flags & OBD_BRW_OVER_PRJQUOTA) {
+				if (oa->o_valid & OBD_MD_FLFLAGS)
+					oa->o_flags |= OBD_FL_NO_PRJQUOTA;
+				else
+					oa->o_flags = OBD_FL_NO_PRJQUOTA;
+			}
 
 			oa->o_valid |= OBD_MD_FLFLAGS;
-			oa->o_valid |= OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA;
+			oa->o_valid |= OBD_MD_FLALLQUOTA;
 		}
-	} else if (cmd == OBD_BRW_READ) {
-		struct ldlm_namespace *ns = ofd->ofd_namespace;
-
-		/* If oa != NULL then ofd_preprw_read updated the inode
-		 * atime and we should update the lvb so that other glimpses
-		 * will also get the updated value. bug 5972 */
-		if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
-			 struct ldlm_resource *rs = NULL;
 
-			ost_fid_build_resid(&info->fti_fid, &info->fti_resid);
+		/**
+		 * Update LVB after writing finish for server lock, see
+		 * comments in ldlm_lock_decref_internal(), If this is a
+		 * local lock on a server namespace and this was the last
+		 * reference, lock will be destroyed directly thus there
+		 * is no chance for ldlm_request_cancel() to update lvb.
+		 */
+		if (rc == 0 && (rnb[0].rnb_flags & OBD_BRW_SRVLOCK)) {
+			ost_fid_build_resid(fid, &info->fti_resid);
 			rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
 					       LDLM_EXTENT, 0);
-			if (rs != NULL) {
-				ns->ns_lvbo->lvbo_update(rs, NULL, 1);
+			if (!IS_ERR(rs)) {
+				ldlm_res_lvbo_update(rs, NULL, 1);
 				ldlm_resource_putref(rs);
 			}
 		}
-		rc = ofd_commitrw_read(env, ofd, &info->fti_fid, objcount,
+
+		/* Convert back to client IDs. LU-9671.
+		 * nodemap_get_from_exp() may fail due to nodemap deactivated,
+		 * server ID will be returned back to client in that case. */
+		nodemap = nodemap_get_from_exp(exp);
+		if (nodemap != NULL && !IS_ERR(nodemap)) {
+			oa->o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
+						   NODEMAP_FS_TO_CLIENT,
+						   oa->o_uid);
+			oa->o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
+						   NODEMAP_FS_TO_CLIENT,
+						   oa->o_gid);
+			nodemap_putref(nodemap);
+		}
+	} else if (cmd == OBD_BRW_READ) {
+		rc = ofd_commitrw_read(env, ofd, fid, objcount,
 				       npages, lnb);
 		if (old_rc)
 			rc = old_rc;
@@ -599,7 +1502,5 @@ int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
 		rc = -EPROTO;
 	}
 
-	if (oti != NULL)
-		ofd_info2oti(info, oti);
 	RETURN(rc);
 }