X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fosd-zfs%2Fosd_object.c;h=b65a282678f2320461b24a1ede9669dc56c2f6f2;hp=6b1373d2abe5546dbdeef32f20e1e532605562f3;hb=f9ca359284357d145819beb08b316e932f7a3060;hpb=c1baab294d7efb10a2e81cefc12dbc8103c8f175

diff --git a/lustre/osd-zfs/osd_object.c b/lustre/osd-zfs/osd_object.c
index 6b1373d..b65a282 100644
--- a/lustre/osd-zfs/osd_object.c
+++ b/lustre/osd-zfs/osd_object.c
@@ -26,10 +26,8 @@
 /*
  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
- */
-/*
- * Copyright (c) 2011, 2012 Whamcloud, Inc.
- * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2015, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -42,14 +40,10 @@
  * Author: Johann Lombardi <johann@whamcloud.com>
  */
 
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
 #define DEBUG_SUBSYSTEM S_OSD
 
 #include <lustre_ver.h>
 #include <libcfs/libcfs.h>
-#include <lustre_fsfilt.h>
 #include <obd_support.h>
 #include <lustre_net.h>
 #include <obd.h>
@@ -72,14 +66,14 @@
 #include <sys/sa_impl.h>
 #include <sys/txg.h>
 
-static char *osd_obj_tag = "osd_object";
+char *osd_obj_tag = "osd_object";
 
 static struct dt_object_operations osd_obj_ops;
 static struct lu_object_operations osd_lu_obj_ops;
 extern struct dt_body_operations osd_body_ops;
 static struct dt_object_operations osd_obj_otable_it_ops;
 
-extern cfs_mem_cache_t *osd_object_kmem;
+extern struct kmem_cache *osd_object_kmem;
 
 static void
 osd_object_sa_fini(struct osd_object *obj)
@@ -91,20 +85,20 @@ osd_object_sa_fini(struct osd_object *obj)
 }
 
 static int
-osd_object_sa_init(struct osd_object *obj, udmu_objset_t *uos)
+osd_object_sa_init(struct osd_object *obj, struct osd_device *o)
 {
 	int rc;
 
 	LASSERT(obj->oo_sa_hdl == NULL);
 	LASSERT(obj->oo_db != NULL);
 
-	rc = -sa_handle_get(uos->os, obj->oo_db->db_object, obj,
+	rc = -sa_handle_get(o->od_os, obj->oo_db->db_object, obj,
 			    SA_HDL_PRIVATE, &obj->oo_sa_hdl);
 	if (rc)
 		return rc;
 
 	/* Cache the xattr object id, valid for the life of the object */
-	rc = -sa_lookup(obj->oo_sa_hdl, SA_ZPL_XATTR(uos), &obj->oo_xattr, 8);
+	rc = -sa_lookup(obj->oo_sa_hdl, SA_ZPL_XATTR(o), &obj->oo_xattr, 8);
 	if (rc == -ENOENT) {
 		obj->oo_xattr = ZFS_NO_OBJECT;
 		rc = 0;
@@ -121,13 +115,15 @@ osd_object_sa_init(struct osd_object *obj, udmu_objset_t *uos)
 static void
 osd_object_sa_dirty_add(struct osd_object *obj, struct osd_thandle *oh)
 {
-	if (!cfs_list_empty(&obj->oo_sa_linkage))
+	if (!list_empty(&obj->oo_sa_linkage))
 		return;
 
-	cfs_down(&oh->ot_sa_lock);
-	if (likely(cfs_list_empty(&obj->oo_sa_linkage)))
-		cfs_list_add(&obj->oo_sa_linkage, &oh->ot_sa_list);
-	cfs_up(&oh->ot_sa_lock);
+	down(&oh->ot_sa_lock);
+	write_lock(&obj->oo_attr_lock);
+	if (likely(list_empty(&obj->oo_sa_linkage)))
+		list_add(&obj->oo_sa_linkage, &oh->ot_sa_list);
+	write_unlock(&obj->oo_attr_lock);
+	up(&oh->ot_sa_lock);
 }
 
 /*
@@ -137,14 +133,16 @@ void osd_object_sa_dirty_rele(struct osd_thandle *oh)
 {
 	struct osd_object *obj;
 
-	cfs_down(&oh->ot_sa_lock);
-	while (!cfs_list_empty(&oh->ot_sa_list)) {
-		obj = cfs_list_entry(oh->ot_sa_list.next,
-				     struct osd_object, oo_sa_linkage);
+	down(&oh->ot_sa_lock);
+	while (!list_empty(&oh->ot_sa_list)) {
+		obj = list_entry(oh->ot_sa_list.next,
+				 struct osd_object, oo_sa_linkage);
 		sa_spill_rele(obj->oo_sa_hdl);
-		cfs_list_del_init(&obj->oo_sa_linkage);
+		write_lock(&obj->oo_attr_lock);
+		list_del_init(&obj->oo_sa_linkage);
+		write_unlock(&obj->oo_attr_lock);
 	}
-	cfs_up(&oh->ot_sa_lock);
+	up(&oh->ot_sa_lock);
 }
 
 /*
@@ -185,7 +183,7 @@ osd_object_sa_bulk_update(struct osd_object *obj, sa_bulk_attr_t *attrs,
 /*
  * Retrieve the attributes of a DMU object
  */
-int __osd_object_attr_get(const struct lu_env *env, udmu_objset_t *uos,
+int __osd_object_attr_get(const struct lu_env *env, struct osd_device *o,
 			  struct osd_object *obj, struct lu_attr *la)
 {
 	struct osa_attr	*osa = &osd_oti_get(env)->oti_osa;
@@ -197,7 +195,7 @@ int __osd_object_attr_get(const struct lu_env *env, udmu_objset_t *uos,
 
 	LASSERT(obj->oo_db != NULL);
 
-	rc = -sa_handle_get(uos->os, obj->oo_db->db_object, NULL,
+	rc = -sa_handle_get(o->od_os, obj->oo_db->db_object, NULL,
 			    SA_HDL_PRIVATE, &sa_hdl);
 	if (rc)
 		RETURN(rc);
@@ -209,15 +207,15 @@ int __osd_object_attr_get(const struct lu_env *env, udmu_objset_t *uos,
 	la->la_valid |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE | LA_TYPE |
 			LA_SIZE | LA_UID | LA_GID | LA_FLAGS | LA_NLINK;
 
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(uos), NULL, osa->atime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(uos), NULL, osa->mtime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(uos), NULL, osa->ctime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(uos), NULL, &osa->mode, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(uos), NULL, &osa->size, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(uos), NULL, &osa->nlink, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(uos), NULL, &osa->uid, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(uos), NULL, &osa->gid, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(uos), NULL, &osa->flags, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(o), NULL, osa->atime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(o), NULL, osa->mtime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(o), NULL, osa->ctime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(o), NULL, &osa->mode, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(o), NULL, &osa->size, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(o), NULL, &osa->nlink, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(o), NULL, &osa->uid, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(o), NULL, &osa->gid, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(o), NULL, &osa->flags, 8);
 
 	rc = -sa_bulk_lookup(sa_hdl, bulk, cnt);
 	if (rc)
@@ -230,11 +228,33 @@ int __osd_object_attr_get(const struct lu_env *env, udmu_objset_t *uos,
 	la->la_uid = osa->uid;
 	la->la_gid = osa->gid;
 	la->la_nlink = osa->nlink;
-	la->la_flags = osa->flags;
+	la->la_flags = attrs_zfs2fs(osa->flags);
 	la->la_size = osa->size;
 
+	/* Try to get extra flag from LMA. Right now, only LMAI_ORPHAN
+	 * flags is stored in LMA, and it is only for orphan directory */
+	if (S_ISDIR(la->la_mode) && dt_object_exists(&obj->oo_dt)) {
+		struct osd_thread_info *info = osd_oti_get(env);
+		struct lustre_mdt_attrs *lma;
+		struct lu_buf buf;
+
+		lma = (struct lustre_mdt_attrs *)info->oti_buf;
+		buf.lb_buf = lma;
+		buf.lb_len = sizeof(info->oti_buf);
+		rc = osd_xattr_get(env, &obj->oo_dt, &buf, XATTR_NAME_LMA);
+		if (rc > 0) {
+			rc = 0;
+			lma->lma_incompat = le32_to_cpu(lma->lma_incompat);
+			obj->oo_lma_flags =
+				lma_to_lustre_flags(lma->lma_incompat);
+
+		} else if (rc == -ENODATA) {
+			rc = 0;
+		}
+	}
+
 	if (S_ISCHR(la->la_mode) || S_ISBLK(la->la_mode)) {
-		rc = -sa_lookup(sa_hdl, SA_ZPL_RDEV(uos), &osa->rdev, 8);
+		rc = -sa_lookup(sa_hdl, SA_ZPL_RDEV(o), &osa->rdev, 8);
 		if (rc)
 			GOTO(out_bulk, rc);
 		la->la_rdev = osa->rdev;
@@ -249,21 +269,19 @@ out_sa:
 }
 
 int __osd_obj2dbuf(const struct lu_env *env, objset_t *os,
-		   uint64_t oid, dmu_buf_t **dbp, void *tag)
+		   uint64_t oid, dmu_buf_t **dbp)
 {
 	dmu_object_info_t *doi = &osd_oti_get(env)->oti_doi;
 	int rc;
 
-	LASSERT(tag);
-
-	rc = -sa_buf_hold(os, oid, tag, dbp);
+	rc = -sa_buf_hold(os, oid, osd_obj_tag, dbp);
 	if (rc)
 		return rc;
 
 	dmu_object_info_from_db(*dbp, doi);
 	if (unlikely (oid != DMU_USERUSED_OBJECT &&
 	    oid != DMU_GROUPUSED_OBJECT && doi->doi_bonus_type != DMU_OT_SA)) {
-		sa_buf_rele(*dbp, tag);
+		sa_buf_rele(*dbp, osd_obj_tag);
 		*dbp = NULL;
 		return -EINVAL;
 	}
@@ -286,7 +304,7 @@ struct lu_object *osd_object_alloc(const struct lu_env *env,
 {
 	struct osd_object *mo;
 
-	OBD_SLAB_ALLOC_PTR_GFP(mo, osd_object_kmem, CFS_ALLOC_IO);
+	OBD_SLAB_ALLOC_PTR_GFP(mo, osd_object_kmem, GFP_NOFS);
 	if (mo != NULL) {
 		struct lu_object *l;
 
@@ -294,10 +312,12 @@ struct lu_object *osd_object_alloc(const struct lu_env *env,
 		dt_object_init(&mo->oo_dt, NULL, d);
 		mo->oo_dt.do_ops = &osd_obj_ops;
 		l->lo_ops = &osd_lu_obj_ops;
-		CFS_INIT_LIST_HEAD(&mo->oo_sa_linkage);
-		cfs_init_rwsem(&mo->oo_sem);
-		cfs_sema_init(&mo->oo_guard, 1);
-		cfs_rwlock_init(&mo->oo_attr_lock);
+		INIT_LIST_HEAD(&mo->oo_sa_linkage);
+		INIT_LIST_HEAD(&mo->oo_unlinked_linkage);
+		init_rwsem(&mo->oo_sem);
+		init_rwsem(&mo->oo_guard);
+		rwlock_init(&mo->oo_attr_lock);
+		mo->oo_destroy = OSD_DESTROY_NONE;
 		return l;
 	} else {
 		return NULL;
@@ -310,8 +330,7 @@ struct lu_object *osd_object_alloc(const struct lu_env *env,
 int osd_object_init0(const struct lu_env *env, struct osd_object *obj)
 {
 	struct osd_device	*osd = osd_obj2dev(obj);
-	udmu_objset_t		*uos = &osd->od_objset;
-	const struct lu_fid	*fid  = lu_object_fid(&obj->oo_dt.do_lu);
+	const struct lu_fid	*fid = lu_object_fid(&obj->oo_dt.do_lu);
 	int			 rc = 0;
 	ENTRY;
 
@@ -320,13 +339,12 @@ int osd_object_init0(const struct lu_env *env, struct osd_object *obj)
 
 	/* object exist */
 
-	rc = osd_object_sa_init(obj, uos);
+	rc = osd_object_sa_init(obj, osd);
 	if (rc)
 		RETURN(rc);
 
 	/* cache attrs in object */
-	rc = __osd_object_attr_get(env, &osd->od_objset,
-				   obj, &obj->oo_attr);
+	rc = __osd_object_attr_get(env, osd, obj, &obj->oo_attr);
 	if (rc)
 		RETURN(rc);
 
@@ -339,12 +357,45 @@ int osd_object_init0(const struct lu_env *env, struct osd_object *obj)
 	 */
 	obj->oo_dt.do_lu.lo_header->loh_attr |= obj->oo_attr.la_mode & S_IFMT;
 
-	cfs_mb();
+	smp_mb();
 	obj->oo_dt.do_lu.lo_header->loh_attr |= LOHA_EXISTS;
 
 	RETURN(0);
 }
 
+static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
+{
+	struct osd_thread_info	*info = osd_oti_get(env);
+	struct lu_buf		buf;
+	int			rc;
+	struct lustre_mdt_attrs	*lma;
+	ENTRY;
+
+	CLASSERT(sizeof(info->oti_buf) >= sizeof(*lma));
+	lma = (struct lustre_mdt_attrs *)info->oti_buf;
+	buf.lb_buf = lma;
+	buf.lb_len = sizeof(info->oti_buf);
+
+	rc = osd_xattr_get(env, &obj->oo_dt, &buf, XATTR_NAME_LMA);
+	if (rc > 0) {
+		rc = 0;
+		lustre_lma_swab(lma);
+		if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
+			     CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
+			CWARN("%s: unsupported incompat LMA feature(s) %#x for "
+			      "fid = "DFID"\n", osd_obj2dev(obj)->od_svname,
+			      lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
+			      PFID(lu_object_fid(&obj->oo_dt.do_lu)));
+			rc = -EOPNOTSUPP;
+		}
+	} else if (rc == -ENODATA) {
+		/* haven't initialize LMA xattr */
+		rc = 0;
+	}
+
+	RETURN(rc);
+}
+
 /*
  * Concurrency: no concurrent access is possible that early in object
  * life-cycle.
@@ -360,27 +411,39 @@ static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 
 	LASSERT(osd_invariant(obj));
 
+	if (fid_is_otable_it(&l->lo_header->loh_fid)) {
+		obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
+		l->lo_header->loh_attr |= LOHA_EXISTS;
+		RETURN(0);
+	}
+
 	rc = osd_fid_lookup(env, osd, lu_object_fid(l), &oid);
 	if (rc == 0) {
 		LASSERT(obj->oo_db == NULL);
-		rc = __osd_obj2dbuf(env, osd->od_objset.os, oid,
-					&obj->oo_db, osd_obj_tag);
-		if (rc == 0) {
-			LASSERT(obj->oo_db);
-			rc = osd_object_init0(env, obj);
-		} else {
+		rc = __osd_obj2dbuf(env, osd->od_os, oid, &obj->oo_db);
+		/* EEXIST will be returned if object is being deleted in ZFS */
+		if (rc == -EEXIST) {
+			rc = 0;
+			GOTO(out, rc);
+		}
+		if (rc != 0) {
 			CERROR("%s: lookup "DFID"/"LPX64" failed: rc = %d\n",
 			       osd->od_svname, PFID(lu_object_fid(l)), oid, rc);
+			GOTO(out, rc);
 		}
+		LASSERT(obj->oo_db);
+		rc = osd_object_init0(env, obj);
+		if (rc != 0)
+			GOTO(out, rc);
+
+		rc = osd_check_lma(env, obj);
+		if (rc != 0)
+			GOTO(out, rc);
 	} else if (rc == -ENOENT) {
-		if (fid_is_otable_it(&l->lo_header->loh_fid)) {
-			obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
-			/* LFSCK iterator object is special without inode */
-			l->lo_header->loh_attr |= LOHA_EXISTS;
-                }
 		rc = 0;
 	}
 	LASSERT(osd_invariant(obj));
+out:
 	RETURN(rc);
 }
 
@@ -398,54 +461,45 @@ static void osd_object_free(const struct lu_env *env, struct lu_object *l)
 	OBD_SLAB_FREE_PTR(obj, osd_object_kmem);
 }
 
-static void __osd_declare_object_destroy(const struct lu_env *env,
-					 struct osd_object *obj,
-					 struct osd_thandle *oh)
+static int
+osd_object_unlinked_add(struct osd_object *obj, struct osd_thandle *oh)
 {
-	struct osd_device	*osd = osd_obj2dev(obj);
-	udmu_objset_t		*uos = &osd->od_objset;
-	dmu_buf_t		*db = obj->oo_db;
-	zap_attribute_t		*za = &osd_oti_get(env)->oti_za;
-	uint64_t		 oid = db->db_object, xid;
-	dmu_tx_t		*tx = oh->ot_tx;
-	zap_cursor_t		*zc;
-	int			 rc = 0;
-
-	dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
+	int rc = -EBUSY;
 
-	/* zap holding xattrs */
-	if (obj->oo_xattr != ZFS_NO_OBJECT) {
-		oid = obj->oo_xattr;
+	LASSERT(obj->oo_destroy == OSD_DESTROY_ASYNC);
 
-		dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END);
-
-		rc = -udmu_zap_cursor_init(&zc, uos, oid, 0);
-		if (rc)
-			goto out;
+	/* the object is supposed to be exclusively locked by
+	 * the caller (osd_object_destroy()), while the transaction
+	 * (oh) is per-thread and not shared */
+	if (likely(list_empty(&obj->oo_unlinked_linkage))) {
+		list_add(&obj->oo_unlinked_linkage, &oh->ot_unlinked_list);
+		rc = 0;
+	}
 
-		while ((rc = -zap_cursor_retrieve(zc, za)) == 0) {
-			BUG_ON(za->za_integer_length != sizeof(uint64_t));
-			BUG_ON(za->za_num_integers != 1);
+	return rc;
+}
 
-			rc = -zap_lookup(uos->os, obj->oo_xattr, za->za_name,
-					 sizeof(uint64_t), 1, &xid);
-			if (rc) {
-				CERROR("%s: xattr lookup failed: rc = %d\n",
-				       osd->od_svname, rc);
-				goto out_err;
-			}
-			dmu_tx_hold_free(tx, xid, 0, DMU_OBJECT_END);
+/* Default to max data size covered by a level-1 indirect block */
+static unsigned long osd_sync_destroy_max_size =
+	1UL << (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT + SPA_MAXBLOCKSHIFT);
+CFS_MODULE_PARM(osd_sync_destroy_max_size, "ul", ulong, 0444,
+		"Maximum object size to use synchronous destroy.");
 
-			zap_cursor_advance(zc);
-		}
-		if (rc == -ENOENT)
-			rc = 0;
-out_err:
-		udmu_zap_cursor_fini(zc);
+static inline void
+osd_object_set_destroy_type(struct osd_object *obj)
+{
+	/*
+	 * Lock-less OST_WRITE can race with OST_DESTROY, so set destroy type
+	 * only once and use it consistently thereafter.
+	 */
+	down_write(&obj->oo_guard);
+	if (obj->oo_destroy == OSD_DESTROY_NONE) {
+		if (obj->oo_attr.la_size <= osd_sync_destroy_max_size)
+			obj->oo_destroy = OSD_DESTROY_SYNC;
+		else /* Larger objects are destroyed asynchronously */
+			obj->oo_destroy = OSD_DESTROY_ASYNC;
 	}
-out:
-	if (rc && tx->tx_err == 0)
-		tx->tx_err = -rc;
+	up_write(&obj->oo_guard);
 }
 
 static int osd_declare_object_destroy(const struct lu_env *env,
@@ -457,8 +511,8 @@ static int osd_declare_object_destroy(const struct lu_env *env,
 	struct osd_object	*obj = osd_dt_obj(dt);
 	struct osd_device	*osd = osd_obj2dev(obj);
 	struct osd_thandle	*oh;
-	uint64_t		 zapid;
 	int			 rc;
+	uint64_t		 zapid;
 	ENTRY;
 
 	LASSERT(th != NULL);
@@ -467,19 +521,18 @@ static int osd_declare_object_destroy(const struct lu_env *env,
 	oh = container_of0(th, struct osd_thandle, ot_super);
 	LASSERT(oh->ot_tx != NULL);
 
-	/* declare that we'll destroy the object */
-	__osd_declare_object_destroy(env, obj, oh);
-
 	/* declare that we'll remove object from fid-dnode mapping */
 	zapid = osd_get_name_n_idx(env, osd, fid, buf);
 	dmu_tx_hold_bonus(oh->ot_tx, zapid);
-	dmu_tx_hold_zap(oh->ot_tx, zapid, 0, buf);
+	dmu_tx_hold_zap(oh->ot_tx, zapid, FALSE, buf);
+
+	osd_declare_xattrs_destroy(env, obj, oh);
 
 	/* declare that we'll remove object from inode accounting ZAPs */
 	dmu_tx_hold_bonus(oh->ot_tx, osd->od_iusr_oid);
-	dmu_tx_hold_zap(oh->ot_tx, osd->od_iusr_oid, 0, buf);
+	dmu_tx_hold_zap(oh->ot_tx, osd->od_iusr_oid, FALSE, buf);
 	dmu_tx_hold_bonus(oh->ot_tx, osd->od_igrp_oid);
-	dmu_tx_hold_zap(oh->ot_tx, osd->od_igrp_oid, 0, buf);
+	dmu_tx_hold_zap(oh->ot_tx, osd->od_igrp_oid, FALSE, buf);
 
 	/* one less inode */
 	rc = osd_declare_quota(env, osd, obj->oo_attr.la_uid,
@@ -490,79 +543,21 @@ static int osd_declare_object_destroy(const struct lu_env *env,
 	/* data to be truncated */
 	rc = osd_declare_quota(env, osd, obj->oo_attr.la_uid,
 			       obj->oo_attr.la_gid, 0, oh, true, NULL, false);
-	RETURN(rc);
-}
-
-int __osd_object_free(udmu_objset_t *uos, uint64_t oid, dmu_tx_t *tx)
-{
-	LASSERT(uos->objects != 0);
-	cfs_spin_lock(&uos->lock);
-	uos->objects--;
-	cfs_spin_unlock(&uos->lock);
-
-	return -dmu_object_free(uos->os, oid, tx);
-}
-
-/*
- * Delete a DMU object
- *
- * The transaction passed to this routine must have
- * dmu_tx_hold_free(tx, oid, 0, DMU_OBJECT_END) called
- * and then assigned to a transaction group.
- *
- * This will release db and set it to NULL to prevent further dbuf releases.
- */
-static int __osd_object_destroy(const struct lu_env *env,
-				struct osd_object *obj,
-				dmu_tx_t *tx, void *tag)
-{
-	struct osd_device	*osd = osd_obj2dev(obj);
-	udmu_objset_t		*uos = &osd->od_objset;
-	uint64_t		 xid;
-	zap_attribute_t		*za = &osd_oti_get(env)->oti_za;
-	zap_cursor_t		*zc;
-	int			 rc;
-
-	/* Assert that the transaction has been assigned to a
-	   transaction group. */
-	LASSERT(tx->tx_txg != 0);
-
-	/* zap holding xattrs */
-	if (obj->oo_xattr != ZFS_NO_OBJECT) {
-		rc = -udmu_zap_cursor_init(&zc, uos, obj->oo_xattr, 0);
-		if (rc)
-			return rc;
-		while ((rc = -zap_cursor_retrieve(zc, za)) == 0) {
-			BUG_ON(za->za_integer_length != sizeof(uint64_t));
-			BUG_ON(za->za_num_integers != 1);
-
-			rc = -zap_lookup(uos->os, obj->oo_xattr, za->za_name,
-					 sizeof(uint64_t), 1, &xid);
-			if (rc) {
-				CERROR("%s: lookup xattr %s failed: rc = %d\n",
-				       osd->od_svname, za->za_name, rc);
-				continue;
-			}
-			rc = __osd_object_free(uos, xid, tx);
-			if (rc)
-				CERROR("%s: fetch xattr %s failed: rc = %d\n",
-				       osd->od_svname, za->za_name, rc);
-			zap_cursor_advance(zc);
-		}
-		udmu_zap_cursor_fini(zc);
+	if (rc)
+		RETURN(rc);
 
-		rc = __osd_object_free(uos, obj->oo_xattr, tx);
-		if (rc)
-			CERROR("%s: freeing xattr failed: rc = %d\n",
-			       osd->od_svname, rc);
-	}
+	osd_object_set_destroy_type(obj);
+	if (obj->oo_destroy == OSD_DESTROY_SYNC)
+		dmu_tx_hold_free(oh->ot_tx, obj->oo_db->db_object,
+				 0, DMU_OBJECT_END);
+	else
+		dmu_tx_hold_zap(oh->ot_tx, osd->od_unlinkedid, TRUE, NULL);
 
-	return __osd_object_free(uos, obj->oo_db->db_object, tx);
+	RETURN(0);
 }
 
 static int osd_object_destroy(const struct lu_env *env,
-			      struct dt_object *dt,
-			      struct thandle *th)
+			      struct dt_object *dt, struct thandle *th)
 {
 	char			*buf = osd_oti_get(env)->oti_str;
 	struct osd_object	*obj = osd_dt_obj(dt);
@@ -570,55 +565,86 @@ static int osd_object_destroy(const struct lu_env *env,
 	const struct lu_fid	*fid = lu_object_fid(&dt->do_lu);
 	struct osd_thandle	*oh;
 	int			 rc;
-	uint64_t		 zapid;
+	uint64_t		 oid, zapid;
 	ENTRY;
 
+	down_write(&obj->oo_guard);
+
+	if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
+		GOTO(out, rc = -ENOENT);
+
 	LASSERT(obj->oo_db != NULL);
-	LASSERT(dt_object_exists(dt));
-	LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
 
 	oh = container_of0(th, struct osd_thandle, ot_super);
 	LASSERT(oh != NULL);
 	LASSERT(oh->ot_tx != NULL);
 
+	/* remove obj ref from index dir (it depends) */
 	zapid = osd_get_name_n_idx(env, osd, fid, buf);
+	rc = -zap_remove(osd->od_os, zapid, buf, oh->ot_tx);
+	if (rc) {
+		CERROR("%s: zap_remove(%s) failed: rc = %d\n",
+		       osd->od_svname, buf, rc);
+		GOTO(out, rc);
+	}
 
-	/* remove obj ref from index dir (it depends) */
-	rc = -zap_remove(osd->od_objset.os, zapid, buf, oh->ot_tx);
+	rc = osd_xattrs_destroy(env, obj, oh);
 	if (rc) {
-		CERROR("%s: zap_remove() failed: rc = %d\n",
-		       osd->od_svname, rc);
+		CERROR("%s: cannot destroy xattrs for %s: rc = %d\n",
+		       osd->od_svname, buf, rc);
 		GOTO(out, rc);
 	}
 
 	/* Remove object from inode accounting. It is not fatal for the destroy
 	 * operation if something goes wrong while updating accounting, but we
 	 * still log an error message to notify the administrator */
-	rc = -zap_increment_int(osd->od_objset.os, osd->od_iusr_oid,
-			obj->oo_attr.la_uid, -1, oh->ot_tx);
+	rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
+				obj->oo_attr.la_uid, -1, oh->ot_tx);
 	if (rc)
 		CERROR("%s: failed to remove "DFID" from accounting ZAP for usr"
-			" %d: rc = %d\n", osd->od_svname, PFID(fid),
-			obj->oo_attr.la_uid, rc);
-	rc = -zap_increment_int(osd->od_objset.os, osd->od_igrp_oid,
+		       " %d: rc = %d\n", osd->od_svname, PFID(fid),
+		       obj->oo_attr.la_uid, rc);
+	rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
 				obj->oo_attr.la_gid, -1, oh->ot_tx);
 	if (rc)
 		CERROR("%s: failed to remove "DFID" from accounting ZAP for grp"
-			" %d: rc = %d\n", osd->od_svname, PFID(fid),
-			obj->oo_attr.la_gid, rc);
+		       " %d: rc = %d\n", osd->od_svname, PFID(fid),
+		       obj->oo_attr.la_gid, rc);
+
+	oid = obj->oo_db->db_object;
+	if (unlikely(obj->oo_destroy == OSD_DESTROY_NONE)) {
+		/* this may happen if the destroy wasn't declared
+		 * e.g. when the object is created and then destroyed
+		 * in the same transaction - we don't need additional
+		 * space for destroy specifically */
+		LASSERT(obj->oo_attr.la_size <= osd_sync_destroy_max_size);
+		rc = -dmu_object_free(osd->od_os, oid, oh->ot_tx);
+		if (rc)
+			CERROR("%s: failed to free %s "LPU64": rc = %d\n",
+			       osd->od_svname, buf, oid, rc);
+	} else if (obj->oo_destroy == OSD_DESTROY_SYNC) {
+		rc = -dmu_object_free(osd->od_os, oid, oh->ot_tx);
+		if (rc)
+			CERROR("%s: failed to free %s "LPU64": rc = %d\n",
+			       osd->od_svname, buf, oid, rc);
+	} else { /* asynchronous destroy */
+		rc = osd_object_unlinked_add(obj, oh);
+		if (rc)
+			GOTO(out, rc);
 
-	/* kill object */
-	rc = __osd_object_destroy(env, obj, oh->ot_tx, osd_obj_tag);
-	if (rc) {
-		CERROR("%s: __osd_object_destroy() failed: rc = %d\n",
-		       osd->od_svname, rc);
-		GOTO(out, rc);
+		rc = -zap_add_int(osd->od_os, osd->od_unlinkedid,
+				  oid, oh->ot_tx);
+		if (rc)
+			CERROR("%s: zap_add_int() failed %s "LPU64": rc = %d\n",
+			       osd->od_svname, buf, oid, rc);
 	}
 
 out:
 	/* not needed in the cache anymore */
 	set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
-
+	if (rc == 0)
+		obj->oo_destroyed = 1;
+	up_write(&obj->oo_guard);
 	RETURN (0);
 }
 
@@ -633,7 +659,7 @@ static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 			obj->oo_sa_xattr = NULL;
 		}
 		sa_buf_rele(obj->oo_db, osd_obj_tag);
-		cfs_list_del(&obj->oo_sa_linkage);
+		list_del(&obj->oo_sa_linkage);
 		obj->oo_db = NULL;
 	}
 }
@@ -664,7 +690,7 @@ static void osd_object_read_lock(const struct lu_env *env,
 
 	LASSERT(osd_invariant(obj));
 
-	cfs_down_read(&obj->oo_sem);
+	down_read_nested(&obj->oo_sem, role);
 }
 
 static void osd_object_write_lock(const struct lu_env *env,
@@ -674,7 +700,7 @@ static void osd_object_write_lock(const struct lu_env *env,
 
 	LASSERT(osd_invariant(obj));
 
-	cfs_down_write(&obj->oo_sem);
+	down_write_nested(&obj->oo_sem, role);
 }
 
 static void osd_object_read_unlock(const struct lu_env *env,
@@ -683,7 +709,7 @@ static void osd_object_read_unlock(const struct lu_env *env,
 	struct osd_object *obj = osd_dt_obj(dt);
 
 	LASSERT(osd_invariant(obj));
-	cfs_up_read(&obj->oo_sem);
+	up_read(&obj->oo_sem);
 }
 
 static void osd_object_write_unlock(const struct lu_env *env,
@@ -692,7 +718,7 @@ static void osd_object_write_unlock(const struct lu_env *env,
         struct osd_object *obj = osd_dt_obj(dt);
 
         LASSERT(osd_invariant(obj));
-        cfs_up_write(&obj->oo_sem);
+	up_write(&obj->oo_sem);
 }
 
 static int osd_object_write_locked(const struct lu_env *env,
@@ -703,43 +729,56 @@ static int osd_object_write_locked(const struct lu_env *env,
 
 	LASSERT(osd_invariant(obj));
 
-	if (cfs_down_write_trylock(&obj->oo_sem)) {
+	if (down_write_trylock(&obj->oo_sem)) {
 		rc = 0;
-		cfs_up_write(&obj->oo_sem);
+		up_write(&obj->oo_sem);
 	}
 	return rc;
 }
 
 static int osd_attr_get(const struct lu_env *env,
 			struct dt_object *dt,
-			struct lu_attr *attr,
-			struct lustre_capa *capa)
+			struct lu_attr *attr)
 {
 	struct osd_object	*obj = osd_dt_obj(dt);
 	uint64_t		 blocks;
 	uint32_t		 blksize;
+	int			 rc = 0;
+
+	down_read(&obj->oo_guard);
+
+	if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
+		GOTO(out, rc = -ENOENT);
 
-	LASSERT(dt_object_exists(dt));
 	LASSERT(osd_invariant(obj));
 	LASSERT(obj->oo_db);
 
-	cfs_read_lock(&obj->oo_attr_lock);
+	read_lock(&obj->oo_attr_lock);
 	*attr = obj->oo_attr;
-	cfs_read_unlock(&obj->oo_attr_lock);
+	if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
+		attr->la_flags |= LUSTRE_ORPHAN_FL;
+	read_unlock(&obj->oo_attr_lock);
 
 	/* with ZFS_DEBUG zrl_add_debug() called by DB_DNODE_ENTER()
 	 * from within sa_object_size() can block on a mutex, so
 	 * we can't call sa_object_size() holding rwlock */
 	sa_object_size(obj->oo_sa_hdl, &blksize, &blocks);
+	/* we do not control size of indices, so always calculate
+	 * it from number of blocks reported by DMU */
+	if (S_ISDIR(attr->la_mode))
+		attr->la_size = 512 * blocks;
 	/* Block size may be not set; suggest maximal I/O transfers. */
 	if (blksize == 0)
-		blksize = 1ULL << SPA_MAXBLOCKSHIFT;
+		blksize = osd_spa_maxblocksize(
+			dmu_objset_spa(osd_obj2dev(obj)->od_os));
 
 	attr->la_blksize = blksize;
 	attr->la_blocks = blocks;
 	attr->la_valid |= LA_BLOCKS | LA_BLKSIZE;
 
-	return 0;
+out:
+	up_read(&obj->oo_guard);
+	return rc;
 }
 
 /* Simple wrapper on top of qsd API which implement quota transfer for osd
@@ -774,8 +813,9 @@ static inline int qsd_transfer(const struct lu_env *env,
 	/* and one less inode for the current id */
 	qi->lqi_id.qid_uid = orig_id;;
 	qi->lqi_space      = -1;
+	/* can't get EDQUOT when reducing usage */
 	rc = qsd_op_begin(env, qsd, trans, qi, NULL);
-	if (rc == -EDQUOT || rc == -EINPROGRESS)
+	if (rc == -EINPROGRESS)
 		rc = 0;
 	if (rc)
 		return rc;
@@ -796,7 +836,8 @@ static inline int qsd_transfer(const struct lu_env *env,
 	qi->lqi_id.qid_uid = orig_id;
 	qi->lqi_space      = -bspace;
 	rc = qsd_op_begin(env, qsd, trans, qi, NULL);
-	if (rc == -EDQUOT || rc == -EINPROGRESS)
+	/* can't get EDQUOT when reducing usage */
+	if (rc == -EINPROGRESS)
 		rc = 0;
 	return rc;
 }
@@ -813,25 +854,31 @@ static int osd_declare_attr_set(const struct lu_env *env,
 	struct osd_thandle	*oh;
 	uint64_t		 bspace;
 	uint32_t		 blksize;
-	int			 rc;
+	int			 rc = 0;
 	ENTRY;
 
-	if (!dt_object_exists(dt)) {
-		/* XXX: sanity check that object creation is declared */
-		RETURN(0);
-	}
 
 	LASSERT(handle != NULL);
 	LASSERT(osd_invariant(obj));
 
 	oh = container_of0(handle, struct osd_thandle, ot_super);
 
+	down_read(&obj->oo_guard);
+	if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
+		GOTO(out, rc = 0);
+
 	LASSERT(obj->oo_sa_hdl != NULL);
+	LASSERT(oh->ot_tx != NULL);
 	dmu_tx_hold_sa(oh->ot_tx, obj->oo_sa_hdl, 0);
+	if (oh->ot_tx->tx_err != 0)
+		GOTO(out, rc = -oh->ot_tx->tx_err);
 
 	sa_object_size(obj->oo_sa_hdl, &blksize, &bspace);
 	bspace = toqb(bspace * blksize);
 
+	__osd_xattr_declare_set(env, obj, sizeof(struct lustre_mdt_attrs),
+				XATTR_NAME_LMA, oh);
+
 	if (attr && attr->la_valid & LA_UID) {
 		/* account for user inode tracking ZAP update */
 		dmu_tx_hold_bonus(oh->ot_tx, osd->od_iusr_oid);
@@ -844,7 +891,7 @@ static int osd_declare_attr_set(const struct lu_env *env,
 					  obj->oo_attr.la_uid, attr->la_uid,
 					  bspace, &info->oti_qi);
 			if (rc)
-				RETURN(rc);
+				GOTO(out, rc);
 		}
 	}
 	if (attr && attr->la_valid & LA_GID) {
@@ -859,11 +906,13 @@ static int osd_declare_attr_set(const struct lu_env *env,
 					  obj->oo_attr.la_gid, attr->la_gid,
 					  bspace, &info->oti_qi);
 			if (rc)
-				RETURN(rc);
+				GOTO(out, rc);
 		}
 	}
 
-	RETURN(0);
+out:
+	up_read(&obj->oo_guard);
+	RETURN(rc);
 }
 
 /*
@@ -874,21 +923,25 @@ static int osd_declare_attr_set(const struct lu_env *env,
  * to a transaction group.
  */
 static int osd_attr_set(const struct lu_env *env, struct dt_object *dt,
-			const struct lu_attr *la, struct thandle *handle,
-			struct lustre_capa *capa)
+			const struct lu_attr *la, struct thandle *handle)
 {
+	struct osd_thread_info	*info = osd_oti_get(env);
 	struct osd_object	*obj = osd_dt_obj(dt);
 	struct osd_device	*osd = osd_obj2dev(obj);
-	udmu_objset_t		*uos = &osd->od_objset;
 	struct osd_thandle	*oh;
-	struct osa_attr		*osa = &osd_oti_get(env)->oti_osa;
+	struct osa_attr		*osa = &info->oti_osa;
 	sa_bulk_attr_t		*bulk;
+	__u64			 valid = la->la_valid;
 	int			 cnt;
 	int			 rc = 0;
 
 	ENTRY;
+
+	down_read(&obj->oo_guard);
+	if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
+		GOTO(out, rc = -ENOENT);
+
 	LASSERT(handle != NULL);
-	LASSERT(dt_object_exists(dt));
 	LASSERT(osd_invariant(obj));
 	LASSERT(obj->oo_sa_hdl);
 
@@ -897,38 +950,75 @@ static int osd_attr_set(const struct lu_env *env, struct dt_object *dt,
 	   transaction group. */
 	LASSERT(oh->ot_tx->tx_txg != 0);
 
-	if (la->la_valid == 0)
-		RETURN(0);
+	/* Only allow set size for regular file */
+	if (!S_ISREG(dt->do_lu.lo_header->loh_attr))
+		valid &= ~(LA_SIZE | LA_BLOCKS);
+
+	if (valid == 0)
+		GOTO(out, rc = 0);
+
+	if (valid & LA_FLAGS) {
+		struct lustre_mdt_attrs *lma;
+		struct lu_buf buf;
+
+		if (la->la_flags & LUSTRE_LMA_FL_MASKS) {
+			CLASSERT(sizeof(info->oti_buf) >= sizeof(*lma));
+			lma = (struct lustre_mdt_attrs *)&info->oti_buf;
+			buf.lb_buf = lma;
+			buf.lb_len = sizeof(info->oti_buf);
+			rc = osd_xattr_get(env, &obj->oo_dt, &buf,
+					   XATTR_NAME_LMA);
+			if (rc > 0) {
+				lma->lma_incompat =
+					le32_to_cpu(lma->lma_incompat);
+				lma->lma_incompat |=
+					lustre_to_lma_flags(la->la_flags);
+				lma->lma_incompat =
+					cpu_to_le32(lma->lma_incompat);
+				buf.lb_buf = lma;
+				buf.lb_len = sizeof(*lma);
+				rc = osd_xattr_set_internal(env, obj, &buf,
+							    XATTR_NAME_LMA,
+							    LU_XATTR_REPLACE,
+							    oh);
+			}
+			if (rc < 0) {
+				CWARN("%s: failed to set LMA flags: rc = %d\n",
+				       osd->od_svname, rc);
+				RETURN(rc);
+			}
+		}
+	}
 
 	OBD_ALLOC(bulk, sizeof(sa_bulk_attr_t) * 10);
 	if (bulk == NULL)
-		RETURN(-ENOMEM);
+		GOTO(out, rc = -ENOMEM);
 
 	/* do both accounting updates outside oo_attr_lock below */
-	if ((la->la_valid & LA_UID) && (la->la_uid != obj->oo_attr.la_uid)) {
+	if ((valid & LA_UID) && (la->la_uid != obj->oo_attr.la_uid)) {
 		/* Update user accounting. Failure isn't fatal, but we still
 		 * log an error message */
-		rc = -zap_increment_int(osd->od_objset.os, osd->od_iusr_oid,
+		rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
 					la->la_uid, 1, oh->ot_tx);
 		if (rc)
 			CERROR("%s: failed to update accounting ZAP for user "
 				"%d (%d)\n", osd->od_svname, la->la_uid, rc);
-		rc = -zap_increment_int(osd->od_objset.os, osd->od_iusr_oid,
+		rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
 					obj->oo_attr.la_uid, -1, oh->ot_tx);
 		if (rc)
 			CERROR("%s: failed to update accounting ZAP for user "
 				"%d (%d)\n", osd->od_svname,
 				obj->oo_attr.la_uid, rc);
 	}
-	if ((la->la_valid & LA_GID) && (la->la_gid != obj->oo_attr.la_gid)) {
+	if ((valid & LA_GID) && (la->la_gid != obj->oo_attr.la_gid)) {
 		/* Update group accounting. Failure isn't fatal, but we still
 		 * log an error message */
-		rc = -zap_increment_int(osd->od_objset.os, osd->od_igrp_oid,
+		rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
 					la->la_gid, 1, oh->ot_tx);
 		if (rc)
 			CERROR("%s: failed to update accounting ZAP for user "
 				"%d (%d)\n", osd->od_svname, la->la_gid, rc);
-		rc = -zap_increment_int(osd->od_objset.os, osd->od_igrp_oid,
+		rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
 					obj->oo_attr.la_gid, -1, oh->ot_tx);
 		if (rc)
 			CERROR("%s: failed to update accounting ZAP for user "
@@ -936,67 +1026,72 @@ static int osd_attr_set(const struct lu_env *env, struct dt_object *dt,
 				obj->oo_attr.la_gid, rc);
 	}
 
-	cfs_write_lock(&obj->oo_attr_lock);
+	write_lock(&obj->oo_attr_lock);
 	cnt = 0;
-	if (la->la_valid & LA_ATIME) {
+	if (valid & LA_ATIME) {
 		osa->atime[0] = obj->oo_attr.la_atime = la->la_atime;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(osd), NULL,
 				 osa->atime, 16);
 	}
-	if (la->la_valid & LA_MTIME) {
+	if (valid & LA_MTIME) {
 		osa->mtime[0] = obj->oo_attr.la_mtime = la->la_mtime;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(osd), NULL,
 				 osa->mtime, 16);
 	}
-	if (la->la_valid & LA_CTIME) {
+	if (valid & LA_CTIME) {
 		osa->ctime[0] = obj->oo_attr.la_ctime = la->la_ctime;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(osd), NULL,
 				 osa->ctime, 16);
 	}
-	if (la->la_valid & LA_MODE) {
+	if (valid & LA_MODE) {
 		/* mode is stored along with type, so read it first */
 		obj->oo_attr.la_mode = (obj->oo_attr.la_mode & S_IFMT) |
 			(la->la_mode & ~S_IFMT);
 		osa->mode = obj->oo_attr.la_mode;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(osd), NULL,
 				 &osa->mode, 8);
 	}
-	if (la->la_valid & LA_SIZE) {
+	if (valid & LA_SIZE) {
 		osa->size = obj->oo_attr.la_size = la->la_size;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(osd), NULL,
 				 &osa->size, 8);
 	}
-	if (la->la_valid & LA_NLINK) {
+	if (valid & LA_NLINK) {
 		osa->nlink = obj->oo_attr.la_nlink = la->la_nlink;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(osd), NULL,
 				 &osa->nlink, 8);
 	}
-	if (la->la_valid & LA_RDEV) {
+	if (valid & LA_RDEV) {
 		osa->rdev = obj->oo_attr.la_rdev = la->la_rdev;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_RDEV(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_RDEV(osd), NULL,
 				 &osa->rdev, 8);
 	}
-	if (la->la_valid & LA_FLAGS) {
-		osa->flags = obj->oo_attr.la_flags = la->la_flags;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(uos), NULL,
+	if (valid & LA_FLAGS) {
+		osa->flags = attrs_fs2zfs(la->la_flags);
+		/* many flags are not supported by zfs, so ensure a good cached
+		 * copy */
+		obj->oo_attr.la_flags = attrs_zfs2fs(osa->flags);
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(osd), NULL,
 				 &osa->flags, 8);
 	}
-	if (la->la_valid & LA_UID) {
+	if (valid & LA_UID) {
 		osa->uid = obj->oo_attr.la_uid = la->la_uid;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(osd), NULL,
 				 &osa->uid, 8);
 	}
-	if (la->la_valid & LA_GID) {
+	if (valid & LA_GID) {
 		osa->gid = obj->oo_attr.la_gid = la->la_gid;
-		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(uos), NULL,
+		SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(osd), NULL,
 				 &osa->gid, 8);
 	}
-	obj->oo_attr.la_valid |= la->la_valid;
-	cfs_write_unlock(&obj->oo_attr_lock);
+	obj->oo_attr.la_valid |= valid;
+	write_unlock(&obj->oo_attr_lock);
 
 	rc = osd_object_sa_bulk_update(obj, bulk, cnt, oh);
 
 	OBD_FREE(bulk, sizeof(sa_bulk_attr_t) * 10);
+out:
+	up_read(&obj->oo_guard);
 	RETURN(rc);
 }
 
@@ -1007,11 +1102,12 @@ static int osd_attr_set(const struct lu_env *env, struct dt_object *dt,
  */
 
 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
-			struct dt_object *parent, cfs_umode_t child_mode)
+			struct dt_object *parent, struct dt_object *child,
+			umode_t child_mode)
 {
 	LASSERT(ah);
 
-	memset(ah, 0, sizeof(*ah));
+	ah->dah_parent = parent;
 	ah->dah_mode = child_mode;
 }
 
@@ -1028,6 +1124,7 @@ static int osd_declare_object_create(const struct lu_env *env,
 	struct osd_device	*osd = osd_obj2dev(obj);
 	struct osd_thandle	*oh;
 	uint64_t		 zapid;
+	int			 rc;
 	ENTRY;
 
 	LASSERT(dof);
@@ -1049,6 +1146,7 @@ static int osd_declare_object_create(const struct lu_env *env,
 
 	switch (dof->dof_type) {
 		case DFT_DIR:
+			dt->do_index_ops = &osd_dir_ops;
 		case DFT_INDEX:
 			/* for zap create */
 			dmu_tx_hold_zap(oh->ot_tx, DMU_NEW_OBJECT, 1, NULL);
@@ -1078,18 +1176,22 @@ static int osd_declare_object_create(const struct lu_env *env,
 
 	dmu_tx_hold_sa_create(oh->ot_tx, ZFS_SA_BASE_ATTR_SIZE);
 
-	RETURN(osd_declare_quota(env, osd, attr->la_uid, attr->la_gid, 1, oh,
-				 false, NULL, false));
+	__osd_xattr_declare_set(env, obj, sizeof(struct lustre_mdt_attrs),
+				XATTR_NAME_LMA, oh);
+
+	rc = osd_declare_quota(env, osd, attr->la_uid, attr->la_gid, 1, oh,
+			       false, NULL, false);
+	RETURN(rc);
 }
 
-int __osd_attr_init(const struct lu_env *env, udmu_objset_t *uos,
-		    uint64_t oid, dmu_tx_t *tx, struct lu_attr *la)
+int __osd_attr_init(const struct lu_env *env, struct osd_device *osd,
+		    uint64_t oid, dmu_tx_t *tx, struct lu_attr *la,
+		    uint64_t parent)
 {
 	sa_bulk_attr_t	*bulk;
 	sa_handle_t	*sa_hdl;
 	struct osa_attr	*osa = &osd_oti_get(env)->oti_osa;
 	uint64_t	 gen;
-	uint64_t	 parent;
 	uint64_t	 crtime[2];
 	timestruc_t	 now;
 	int		 cnt;
@@ -1099,9 +1201,6 @@ int __osd_attr_init(const struct lu_env *env, udmu_objset_t *uos,
 	gen = dmu_tx_get_txg(tx);
 
 	ZFS_TIME_ENCODE(&now, crtime);
-	/* XXX: this should be real id of parent for ZPL access, but we have no
-	 * such info in OSD, probably it can be part of dt_object_format */
-	parent = 0;
 
 	osa->atime[0] = la->la_atime;
 	osa->ctime[0] = la->la_ctime;
@@ -1111,11 +1210,11 @@ int __osd_attr_init(const struct lu_env *env, udmu_objset_t *uos,
 	osa->gid = la->la_gid;
 	osa->rdev = la->la_rdev;
 	osa->nlink = la->la_nlink;
-	osa->flags = la->la_flags;
+	osa->flags = attrs_fs2zfs(la->la_flags);
 	osa->size  = la->la_size;
 
 	/* Now add in all of the "SA" attributes */
-	rc = -sa_handle_get(uos->os, oid, NULL, SA_HDL_PRIVATE, &sa_hdl);
+	rc = -sa_handle_get(osd->od_os, oid, NULL, SA_HDL_PRIVATE, &sa_hdl);
 	if (rc)
 		return rc;
 
@@ -1135,19 +1234,19 @@ int __osd_attr_init(const struct lu_env *env, udmu_objset_t *uos,
 	 * work around the problem. See ORI-610.
 	 */
 	cnt = 0;
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(uos), NULL, &osa->mode, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(uos), NULL, &osa->size, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GEN(uos), NULL, &gen, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(uos), NULL, &osa->uid, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(uos), NULL, &osa->gid, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_PARENT(uos), NULL, &parent, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(uos), NULL, &osa->flags, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(uos), NULL, osa->atime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(uos), NULL, osa->mtime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(uos), NULL, osa->ctime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CRTIME(uos), NULL, crtime, 16);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(uos), NULL, &osa->nlink, 8);
-	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_RDEV(uos), NULL, &osa->rdev, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(osd), NULL, &osa->mode, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(osd), NULL, &osa->size, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GEN(osd), NULL, &gen, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(osd), NULL, &osa->uid, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(osd), NULL, &osa->gid, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_PARENT(osd), NULL, &parent, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(osd), NULL, &osa->flags, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(osd), NULL, osa->atime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(osd), NULL, osa->mtime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(osd), NULL, osa->ctime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CRTIME(osd), NULL, crtime, 16);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(osd), NULL, &osa->nlink, 8);
+	SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_RDEV(osd), NULL, &osa->rdev, 8);
 
 	rc = -sa_replace_all_by_template(sa_hdl, bulk, cnt, tx);
 
@@ -1162,34 +1261,45 @@ out:
  * dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT) called and then assigned
  * to a transaction group.
  */
-int __osd_object_create(const struct lu_env *env, udmu_objset_t *uos,
-			dmu_buf_t **dbp, dmu_tx_t *tx,
-			struct lu_attr *la, void *tag)
+int __osd_object_create(const struct lu_env *env, struct osd_object *obj,
+			dmu_buf_t **dbp, dmu_tx_t *tx, struct lu_attr *la,
+			uint64_t parent)
 {
-	uint64_t oid;
-	int	 rc;
-
-	LASSERT(tag);
-	cfs_spin_lock(&uos->lock);
-	uos->objects++;
-	cfs_spin_unlock(&uos->lock);
+	uint64_t	     oid;
+	int		     rc;
+	struct osd_device   *osd = osd_obj2dev(obj);
+	const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
+	dmu_object_type_t    type = DMU_OT_PLAIN_FILE_CONTENTS;
 
 	/* Assert that the transaction has been assigned to a
 	   transaction group. */
 	LASSERT(tx->tx_txg != 0);
 
+	/* Use DMU_OTN_UINT8_METADATA for local objects so their data blocks
+	 * would get an additional ditto copy */
+	if (unlikely(S_ISREG(la->la_mode) &&
+		     fid_seq_is_local_file(fid_seq(fid))))
+		type = DMU_OTN_UINT8_METADATA;
+
 	/* Create a new DMU object. */
-	oid = dmu_object_alloc(uos->os, DMU_OT_PLAIN_FILE_CONTENTS, 0,
+	oid = dmu_object_alloc(osd->od_os, type, 0,
 			       DMU_OT_SA, DN_MAX_BONUSLEN, tx);
-	rc = -sa_buf_hold(uos->os, oid, tag, dbp);
-	if (rc)
-		return rc;
+	rc = -sa_buf_hold(osd->od_os, oid, osd_obj_tag, dbp);
+	LASSERTF(rc == 0, "sa_buf_hold "LPU64" failed: %d\n", oid, rc);
 
 	LASSERT(la->la_valid & LA_MODE);
 	la->la_size = 0;
 	la->la_nlink = 1;
 
-	return __osd_attr_init(env, uos, oid, tx, la);
+	rc = __osd_attr_init(env, osd, oid, tx, la, parent);
+	if (rc != 0) {
+		sa_buf_rele(*dbp, osd_obj_tag);
+		*dbp = NULL;
+		dmu_object_free(osd->od_os, oid, tx);
+		return rc;
+	}
+
+	return 0;
 }
 
 /*
@@ -1202,28 +1312,24 @@ int __osd_object_create(const struct lu_env *env, udmu_objset_t *uos,
  * will also require a FAT ZAP.  If there is a new type of micro ZAP created
  * then we might need to re-evaluate the use of this flag and instead do
  * a conversion from the different internal ZAP hash formats being used. */
-int __osd_zap_create(const struct lu_env *env, udmu_objset_t *uos,
+int __osd_zap_create(const struct lu_env *env, struct osd_device *osd,
 		     dmu_buf_t **zap_dbp, dmu_tx_t *tx,
-		     struct lu_attr *la, void *tag, zap_flags_t flags)
+		     struct lu_attr *la, uint64_t parent, zap_flags_t flags)
 {
 	uint64_t oid;
 	int	 rc;
 
-	LASSERT(tag);
-
-	cfs_spin_lock(&uos->lock);
-	uos->objects++;
-	cfs_spin_unlock(&uos->lock);
-
 	/* Assert that the transaction has been assigned to a
 	   transaction group. */
 	LASSERT(tx->tx_txg != 0);
 
-	oid = zap_create_flags(uos->os, 0, flags | ZAP_FLAG_HASH64,
-			       DMU_OT_DIRECTORY_CONTENTS, 12, 12,
+	oid = zap_create_flags(osd->od_os, 0, flags | ZAP_FLAG_HASH64,
+			       DMU_OT_DIRECTORY_CONTENTS,
+			       14, /* == ZFS fzap_default_block_shift */
+			       DN_MAX_INDBLKSHIFT, /* indirect block shift */
 			       DMU_OT_SA, DN_MAX_BONUSLEN, tx);
 
-	rc = -sa_buf_hold(uos->os, oid, tag, zap_dbp);
+	rc = -sa_buf_hold(osd->od_os, oid, osd_obj_tag, zap_dbp);
 	if (rc)
 		return rc;
 
@@ -1231,11 +1337,12 @@ int __osd_zap_create(const struct lu_env *env, udmu_objset_t *uos,
 	la->la_size = 2;
 	la->la_nlink = 1;
 
-	return __osd_attr_init(env, uos, oid, tx, la);
+	return __osd_attr_init(env, osd, oid, tx, la, parent);
 }
 
-static dmu_buf_t *osd_mkidx(const struct lu_env *env, struct osd_device *osd,
-			    struct lu_attr *la, struct osd_thandle *oh)
+static dmu_buf_t *osd_mkidx(const struct lu_env *env, struct osd_object *obj,
+			    struct lu_attr *la, uint64_t parent,
+			    struct osd_thandle *oh)
 {
 	dmu_buf_t *db;
 	int	   rc;
@@ -1245,47 +1352,51 @@ static dmu_buf_t *osd_mkidx(const struct lu_env *env, struct osd_device *osd,
 	 * We set ZAP_FLAG_UINT64_KEY to let ZFS know than we are going to use
 	 * binary keys */
 	LASSERT(S_ISREG(la->la_mode));
-	rc = __osd_zap_create(env, &osd->od_objset, &db, oh->ot_tx, la,
-			      osd_obj_tag, ZAP_FLAG_UINT64_KEY);
+	rc = __osd_zap_create(env, osd_obj2dev(obj), &db, oh->ot_tx, la, parent,
+			      ZAP_FLAG_UINT64_KEY);
 	if (rc)
 		return ERR_PTR(rc);
 	return db;
 }
 
-static dmu_buf_t *osd_mkdir(const struct lu_env *env, struct osd_device *osd,
-			    struct lu_attr *la, struct osd_thandle *oh)
+static dmu_buf_t *osd_mkdir(const struct lu_env *env, struct osd_object *obj,
+			    struct lu_attr *la, uint64_t parent,
+			    struct osd_thandle *oh)
 {
 	dmu_buf_t *db;
 	int	   rc;
 
 	LASSERT(S_ISDIR(la->la_mode));
-	rc = __osd_zap_create(env, &osd->od_objset, &db, oh->ot_tx, la,
-			      osd_obj_tag, 0);
+	rc = __osd_zap_create(env, osd_obj2dev(obj), &db,
+			      oh->ot_tx, la, parent, 0);
 	if (rc)
 		return ERR_PTR(rc);
 	return db;
 }
 
-static dmu_buf_t* osd_mkreg(const struct lu_env *env, struct osd_device *osd,
-			    struct lu_attr *la, struct osd_thandle *oh)
+static dmu_buf_t *osd_mkreg(const struct lu_env *env, struct osd_object *obj,
+			    struct lu_attr *la, uint64_t parent,
+			    struct osd_thandle *oh)
 {
-	dmu_buf_t *db;
-	int	    rc;
+	dmu_buf_t	  *db;
+	int		   rc;
+	struct osd_device *osd = osd_obj2dev(obj);
 
 	LASSERT(S_ISREG(la->la_mode));
-	rc = __osd_object_create(env, &osd->od_objset, &db, oh->ot_tx, la,
-				 osd_obj_tag);
+	rc = __osd_object_create(env, obj, &db, oh->ot_tx, la, parent);
 	if (rc)
 		return ERR_PTR(rc);
 
 	/*
-	 * XXX: a hack, OST to use bigger blocksize. we need
-	 * a method in OSD API to control this from OFD/MDD
+	 * XXX: This heuristic is non-optimal.  It would be better to
+	 * increase the blocksize up to osd->od_max_blksz during the write.
+	 * This is exactly how the ZPL behaves and it ensures that the right
+	 * blocksize is selected based on the file size rather than the
+	 * making broad assumptions based on the osd type.
 	 */
 	if (!lu_device_is_md(osd2lu_dev(osd))) {
-		rc = -dmu_object_set_blocksize(osd->od_objset.os,
-					       db->db_object,
-				128 << 10, 0, oh->ot_tx);
+		rc = -dmu_object_set_blocksize(osd->od_os, db->db_object,
+					       osd->od_max_blksz, 0, oh->ot_tx);
 		if (unlikely(rc)) {
 			CERROR("%s: can't change blocksize: %d\n",
 			       osd->od_svname, rc);
@@ -1296,22 +1407,23 @@ static dmu_buf_t* osd_mkreg(const struct lu_env *env, struct osd_device *osd,
 	return db;
 }
 
-static dmu_buf_t *osd_mksym(const struct lu_env *env, struct osd_device *osd,
-			    struct lu_attr *la, struct osd_thandle *oh)
+static dmu_buf_t *osd_mksym(const struct lu_env *env, struct osd_object *obj,
+			    struct lu_attr *la, uint64_t parent,
+			    struct osd_thandle *oh)
 {
 	dmu_buf_t *db;
 	int	   rc;
 
 	LASSERT(S_ISLNK(la->la_mode));
-	rc = __osd_object_create(env, &osd->od_objset, &db, oh->ot_tx, la,
-				 osd_obj_tag);
+	rc = __osd_object_create(env, obj, &db, oh->ot_tx, la, parent);
 	if (rc)
 		return ERR_PTR(rc);
 	return db;
 }
 
-static dmu_buf_t *osd_mknod(const struct lu_env *env, struct osd_device *osd,
-			    struct lu_attr *la, struct osd_thandle *oh)
+static dmu_buf_t *osd_mknod(const struct lu_env *env, struct osd_object *obj,
+			    struct lu_attr *la, uint64_t parent,
+			    struct osd_thandle *oh)
 {
 	dmu_buf_t *db;
 	int	   rc;
@@ -1320,15 +1432,17 @@ static dmu_buf_t *osd_mknod(const struct lu_env *env, struct osd_device *osd,
 	if (S_ISCHR(la->la_mode) || S_ISBLK(la->la_mode))
 		la->la_valid |= LA_RDEV;
 
-	rc = __osd_object_create(env, &osd->od_objset, &db, oh->ot_tx, la,
-				 osd_obj_tag);
+	rc = __osd_object_create(env, obj, &db, oh->ot_tx, la, parent);
 	if (rc)
 		return ERR_PTR(rc);
 	return db;
 }
 
-typedef dmu_buf_t *(*osd_obj_type_f)(const struct lu_env *env, struct osd_device *osd,
-				     struct lu_attr *la, struct osd_thandle *oh);
+typedef dmu_buf_t *(*osd_obj_type_f)(const struct lu_env *env,
+				     struct osd_object *obj,
+				     struct lu_attr *la,
+				     uint64_t parent,
+				     struct osd_thandle *oh);
 
 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
 {
@@ -1360,6 +1474,24 @@ static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
 /*
  * Primitives for directory (i.e. ZAP) handling
  */
+static inline int osd_init_lma(const struct lu_env *env, struct osd_object *obj,
+			       const struct lu_fid *fid, struct osd_thandle *oh)
+{
+	struct osd_thread_info	*info = osd_oti_get(env);
+	struct lustre_mdt_attrs	*lma = &info->oti_mdt_attrs;
+	struct lu_buf		 buf;
+	int rc;
+
+	lustre_lma_init(lma, fid, 0, 0);
+	lustre_lma_swab(lma);
+	buf.lb_buf = lma;
+	buf.lb_len = sizeof(*lma);
+
+	rc = osd_xattr_set_internal(env, obj, &buf, XATTR_NAME_LMA,
+				    LU_XATTR_CREATE, oh);
+
+	return rc;
+}
 
 /*
  * Concurrency: @dt is write locked.
@@ -1385,10 +1517,12 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
 	/* concurrent create declarations should not see
 	 * the object inconsistent (db, attr, etc).
 	 * in regular cases acquisition should be cheap */
-	cfs_down(&obj->oo_guard);
+	down_write(&obj->oo_guard);
+
+	if (unlikely(dt_object_exists(dt)))
+		GOTO(out, rc = -EEXIST);
 
 	LASSERT(osd_invariant(obj));
-	LASSERT(!dt_object_exists(dt));
 	LASSERT(dof != NULL);
 
 	LASSERT(th != NULL);
@@ -1400,9 +1534,16 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
 
 	LASSERT(obj->oo_db == NULL);
 
-	db = osd_create_type_f(dof->dof_type)(env, osd, attr, oh);
+	/* to follow ZFS on-disk format we need
+	 * to initialize parent dnode properly */
+	zapid = 0;
+	if (hint != NULL && hint->dah_parent != NULL &&
+	    !dt_object_remote(hint->dah_parent))
+		zapid = osd_dt_obj(hint->dah_parent)->oo_db->db_object;
+
+	db = osd_create_type_f(dof->dof_type)(env, obj, attr, zapid, oh);
 	if (IS_ERR(db))
-		GOTO(out, rc = PTR_ERR(th));
+		GOTO(out, rc = PTR_ERR(db));
 
 	zde->zde_pad = 0;
 	zde->zde_dnode = db->db_object;
@@ -1410,19 +1551,19 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
 
 	zapid = osd_get_name_n_idx(env, osd, fid, buf);
 
-	rc = -zap_add(osd->od_objset.os, zapid, buf, 8, 1, zde, oh->ot_tx);
+	rc = -zap_add(osd->od_os, zapid, buf, 8, 1, zde, oh->ot_tx);
 	if (rc)
 		GOTO(out, rc);
 
 	/* Add new object to inode accounting.
 	 * Errors are not considered as fatal */
-	rc = -zap_increment_int(osd->od_objset.os, osd->od_iusr_oid,
+	rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
 				(attr->la_valid & LA_UID) ? attr->la_uid : 0, 1,
 				oh->ot_tx);
 	if (rc)
 		CERROR("%s: failed to add "DFID" to accounting ZAP for usr %d "
 			"(%d)\n", osd->od_svname, PFID(fid), attr->la_uid, rc);
-	rc = -zap_increment_int(osd->od_objset.os, osd->od_igrp_oid,
+	rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
 				(attr->la_valid & LA_GID) ? attr->la_gid : 0, 1,
 				oh->ot_tx);
 	if (rc)
@@ -1435,8 +1576,16 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
 	LASSERT(ergo(rc == 0, dt_object_exists(dt)));
 	LASSERT(osd_invariant(obj));
 
+	rc = osd_init_lma(env, obj, fid, oh);
+	if (rc) {
+		CERROR("%s: can not set LMA on "DFID": rc = %d\n",
+		       osd->od_svname, PFID(fid), rc);
+		/* ignore errors during LMA initialization */
+		rc = 0;
+	}
+
 out:
-	cfs_up(&obj->oo_guard);
+	up_write(&obj->oo_guard);
 	RETURN(rc);
 }
 
@@ -1457,24 +1606,29 @@ static int osd_object_ref_add(const struct lu_env *env,
 	struct osd_object	*obj = osd_dt_obj(dt);
 	struct osd_thandle	*oh;
 	struct osd_device	*osd = osd_obj2dev(obj);
-	udmu_objset_t		*uos = &osd->od_objset;
 	uint64_t		 nlink;
 	int rc;
 
 	ENTRY;
 
+	down_read(&obj->oo_guard);
+	if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
+		GOTO(out, rc = -ENOENT);
+
 	LASSERT(osd_invariant(obj));
-	LASSERT(dt_object_exists(dt));
 	LASSERT(obj->oo_sa_hdl != NULL);
 
 	oh = container_of0(handle, struct osd_thandle, ot_super);
 
-	cfs_write_lock(&obj->oo_attr_lock);
+	write_lock(&obj->oo_attr_lock);
 	nlink = ++obj->oo_attr.la_nlink;
-	cfs_write_unlock(&obj->oo_attr_lock);
+	write_unlock(&obj->oo_attr_lock);
 
-	rc = osd_object_sa_update(obj, SA_ZPL_LINKS(uos), &nlink, 8, oh);
-	return rc;
+	rc = osd_object_sa_update(obj, SA_ZPL_LINKS(osd), &nlink, 8, oh);
+
+out:
+	up_read(&obj->oo_guard);
+	RETURN(rc);
 }
 
 static int osd_declare_object_ref_del(const struct lu_env *env,
@@ -1494,174 +1648,44 @@ static int osd_object_ref_del(const struct lu_env *env,
 	struct osd_object	*obj = osd_dt_obj(dt);
 	struct osd_thandle	*oh;
 	struct osd_device	*osd = osd_obj2dev(obj);
-	udmu_objset_t		*uos = &osd->od_objset;
 	uint64_t		 nlink;
 	int			 rc;
 
 	ENTRY;
 
+	down_read(&obj->oo_guard);
+
+	if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
+		GOTO(out, rc = -ENOENT);
+
 	LASSERT(osd_invariant(obj));
-	LASSERT(dt_object_exists(dt));
 	LASSERT(obj->oo_sa_hdl != NULL);
 
 	oh = container_of0(handle, struct osd_thandle, ot_super);
 	LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
 
-	cfs_write_lock(&obj->oo_attr_lock);
+	write_lock(&obj->oo_attr_lock);
 	nlink = --obj->oo_attr.la_nlink;
-	cfs_write_unlock(&obj->oo_attr_lock);
+	write_unlock(&obj->oo_attr_lock);
 
-	rc = osd_object_sa_update(obj, SA_ZPL_LINKS(uos), &nlink, 8, oh);
-	return rc;
-}
+	rc = osd_object_sa_update(obj, SA_ZPL_LINKS(osd), &nlink, 8, oh);
 
-static int capa_is_sane(const struct lu_env *env, struct osd_device *dev,
-			struct lustre_capa *capa, struct lustre_capa_key *keys)
-{
-	struct osd_thread_info	*oti = osd_oti_get(env);
-	struct obd_capa		*oc;
-	int			 i, rc = 0;
-	ENTRY;
-
-	oc = capa_lookup(dev->od_capa_hash, capa, 0);
-	if (oc) {
-		if (capa_is_expired(oc)) {
-			DEBUG_CAPA(D_ERROR, capa, "expired");
-			rc = -ESTALE;
-		}
-		capa_put(oc);
-		RETURN(rc);
-	}
-
-	cfs_spin_lock(&capa_lock);
-	for (i = 0; i < 2; i++) {
-		if (keys[i].lk_keyid == capa->lc_keyid) {
-			oti->oti_capa_key = keys[i];
-			break;
-		}
-	}
-	cfs_spin_unlock(&capa_lock);
-
-	if (i == 2) {
-		DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
-		RETURN(-ESTALE);
-	}
-
-	rc = capa_hmac(oti->oti_capa.lc_hmac, capa, oti->oti_capa_key.lk_key);
-	if (rc)
-		RETURN(rc);
-	if (memcmp(oti->oti_capa.lc_hmac, capa->lc_hmac, sizeof(capa->lc_hmac)))
-	{
-		DEBUG_CAPA(D_ERROR, capa, "HMAC mismatch");
-		RETURN(-EACCES);
-	}
-
-	oc = capa_add(dev->od_capa_hash, capa);
-	capa_put(oc);
-
-	RETURN(0);
-}
-
-static int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
-			   struct lustre_capa *capa, __u64 opc)
-{
-	const struct lu_fid	*fid = lu_object_fid(&dt->do_lu);
-	struct osd_device	*dev = osd_dev(dt->do_lu.lo_dev);
-	int			 rc;
-
-	if (!dev->od_fl_capa)
-		return 0;
-
-	if (capa == BYPASS_CAPA)
-		return 0;
-
-	if (!capa) {
-		CERROR("no capability is provided for fid "DFID"\n", PFID(fid));
-		return -EACCES;
-	}
-
-	if (!lu_fid_eq(fid, &capa->lc_fid)) {
-		DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",PFID(fid));
-		return -EACCES;
-	}
-
-	if (!capa_opc_supported(capa, opc)) {
-		DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
-		return -EACCES;
-	}
-
-	if ((rc = capa_is_sane(env, dev, capa, dev->od_capa_keys))) {
-		DEBUG_CAPA(D_ERROR, capa, "insane (rc %d)", rc);
-		return -EACCES;
-	}
-
-	return 0;
-}
-
-static struct obd_capa *osd_capa_get(const struct lu_env *env,
-				     struct dt_object *dt,
-				     struct lustre_capa *old,
-				     __u64 opc)
-{
-	struct osd_thread_info	*info = osd_oti_get(env);
-	const struct lu_fid	*fid = lu_object_fid(&dt->do_lu);
-	struct osd_object	*obj = osd_dt_obj(dt);
-	struct osd_device	*dev = osd_obj2dev(obj);
-	struct lustre_capa_key	*key = &info->oti_capa_key;
-	struct lustre_capa	*capa = &info->oti_capa;
-	struct obd_capa		*oc;
-	int			 rc;
-	ENTRY;
-
-	if (!dev->od_fl_capa)
-		RETURN(ERR_PTR(-ENOENT));
-
-	LASSERT(dt_object_exists(dt));
-	LASSERT(osd_invariant(obj));
-
-	/* renewal sanity check */
-	if (old && osd_object_auth(env, dt, old, opc))
-		RETURN(ERR_PTR(-EACCES));
-
-	capa->lc_fid = *fid;
-	capa->lc_opc = opc;
-	capa->lc_uid = 0;
-	capa->lc_flags = dev->od_capa_alg << 24;
-	capa->lc_timeout = dev->od_capa_timeout;
-	capa->lc_expiry = 0;
-
-	oc = capa_lookup(dev->od_capa_hash, capa, 1);
-	if (oc) {
-		LASSERT(!capa_is_expired(oc));
-		RETURN(oc);
-	}
-
-	cfs_spin_lock(&capa_lock);
-	*key = dev->od_capa_keys[1];
-	cfs_spin_unlock(&capa_lock);
-
-	capa->lc_keyid = key->lk_keyid;
-	capa->lc_expiry = cfs_time_current_sec() + dev->od_capa_timeout;
-
-	rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
-	if (rc) {
-		DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
-		LBUG();
-		RETURN(ERR_PTR(rc));
-	}
-
-	oc = capa_add(dev->od_capa_hash, capa);
-	RETURN(oc);
+out:
+	up_read(&obj->oo_guard);
+	RETURN(rc);
 }
 
-static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
+static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
+			   __u64 start, __u64 end)
 {
 	struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
 	ENTRY;
 
 	/* XXX: no other option than syncing the whole filesystem until we
-	 * support ZIL */
-	txg_wait_synced(dmu_objset_pool(osd->od_objset.os), 0ULL);
+	 * support ZIL.  If the object tracked the txg that it was last
+	 * modified in, it could pass that txg here instead of "0".  Maybe
+	 * the changes are already committed, so no wait is needed at all? */
+	txg_wait_synced(dmu_objset_pool(osd->od_os), 0ULL);
 
 	RETURN(0);
 }
@@ -1691,7 +1715,6 @@ static struct dt_object_operations osd_obj_ops = {
 	.do_declare_xattr_del	= osd_declare_xattr_del,
 	.do_xattr_del		= osd_xattr_del,
 	.do_xattr_list		= osd_xattr_list,
-	.do_capa_get		= osd_capa_get,
 	.do_object_sync		= osd_object_sync,
 };
 
@@ -1706,8 +1729,7 @@ static struct lu_object_operations osd_lu_obj_ops = {
 
 static int osd_otable_it_attr_get(const struct lu_env *env,
 				struct dt_object *dt,
-				struct lu_attr *attr,
-				struct lustre_capa *capa)
+				struct lu_attr *attr)
 {
 	attr->la_valid = 0;
 	return 0;
@@ -1717,4 +1739,3 @@ static struct dt_object_operations osd_obj_otable_it_ops = {
         .do_attr_get    = osd_otable_it_attr_get,
         .do_index_try   = osd_index_try,
 };
-