Whamcloud - gitweb
LU-1199 build: Assume that ldiskfs PDO is now standard
[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
index 147fd69..2622a35 100644 (file)
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@ -28,6 +26,8 @@
 /*
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -41,9 +41,6 @@
  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  */
 
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
 #define DEBUG_SUBSYSTEM S_MDS
 
 #include <linux/module.h>
 
 /* llo_* api support */
 #include <md_object.h>
+#include <lustre_quota.h>
+
+int ldiskfs_pdo = 1;
+CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
+                "ldiskfs with parallel directory operations");
 
 static const char dot[] = ".";
 static const char dotdot[] = "..";
 static const char remote_obj_dir[] = "REM_OBJ_DIR";
 
-struct osd_directory {
-        struct iam_container od_container;
-        struct iam_descr     od_descr;
-};
-
-struct osd_object {
-        struct dt_object       oo_dt;
-        /**
-         * Inode for file system object represented by this osd_object. This
-         * inode is pinned for the whole duration of lu_object life.
-         *
-         * Not modified concurrently (either setup early during object
-         * creation, or assigned by osd_object_create() under write lock).
-         */
-        struct inode          *oo_inode;
-        /**
-         * to protect index ops.
-         */
-        cfs_rw_semaphore_t     oo_ext_idx_sem;
-        cfs_rw_semaphore_t     oo_sem;
-        struct osd_directory  *oo_dir;
-        /** protects inode attributes. */
-        cfs_spinlock_t         oo_guard;
-        /**
-         * Following two members are used to indicate the presence of dot and
-         * dotdot in the given directory. This is required for interop mode
-         * (b11826).
-         */
-        int                    oo_compat_dot_created;
-        int                    oo_compat_dotdot_created;
-
-        const struct lu_env   *oo_owner;
-#ifdef CONFIG_LOCKDEP
-        struct lockdep_map     oo_dep_map;
-#endif
-};
-
 static const struct lu_object_operations      osd_lu_obj_ops;
-static const struct lu_device_operations      osd_lu_ops;
-static       struct lu_context_key            osd_key;
 static const struct dt_object_operations      osd_obj_ops;
 static const struct dt_object_operations      osd_obj_ea_ops;
-static const struct dt_body_operations        osd_body_ops;
+static const struct dt_object_operations      osd_obj_otable_it_ops;
 static const struct dt_index_operations       osd_index_iam_ops;
 static const struct dt_index_operations       osd_index_ea_ops;
 
-struct osd_thandle {
-        struct thandle          ot_super;
-        handle_t               *ot_handle;
-        struct journal_callback ot_jcb;
-        /* Link to the device, for debugging. */
-        struct lu_ref_link     *ot_dev_link;
-
-#if OSD_THANDLE_STATS
-        /** time when this handle was allocated */
-        cfs_time_t oth_alloced;
-
-        /** time when this thanle was started */
-        cfs_time_t oth_started;
-#endif
-};
-
-/*
- * Helpers.
- */
-static int lu_device_is_osd(const struct lu_device *d)
-{
-        return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &osd_lu_ops);
-}
-
-static struct osd_device *osd_dt_dev(const struct dt_device *d)
-{
-        LASSERT(lu_device_is_osd(&d->dd_lu_dev));
-        return container_of0(d, struct osd_device, od_dt_dev);
-}
-
-static struct osd_device *osd_dev(const struct lu_device *d)
-{
-        LASSERT(lu_device_is_osd(d));
-        return osd_dt_dev(container_of0(d, struct dt_device, dd_lu_dev));
-}
-
-static struct osd_device *osd_obj2dev(const struct osd_object *o)
-{
-        return osd_dev(o->oo_dt.do_lu.lo_dev);
-}
-
-static struct super_block *osd_sb(const struct osd_device *dev)
-{
-        return dev->od_mount->lmi_mnt->mnt_sb;
-}
-
-static int osd_object_is_root(const struct osd_object *obj)
-{
-        return osd_sb(osd_obj2dev(obj))->s_root->d_inode == obj->oo_inode;
-}
-
-static struct osd_object *osd_obj(const struct lu_object *o)
-{
-        LASSERT(lu_device_is_osd(o->lo_dev));
-        return container_of0(o, struct osd_object, oo_dt.do_lu);
-}
-
-static struct osd_object *osd_dt_obj(const struct dt_object *d)
-{
-        return osd_obj(&d->do_lu);
-}
-
-static struct lu_device *osd2lu_dev(struct osd_device *osd)
-{
-        return &osd->od_dt_dev.dd_lu_dev;
-}
-
-static journal_t *osd_journal(const struct osd_device *dev)
-{
-        return LDISKFS_SB(osd_sb(dev))->s_journal;
-}
-
 static int osd_has_index(const struct osd_object *obj)
 {
         return obj->oo_dt.do_index_ops != NULL;
@@ -208,46 +99,6 @@ static int osd_object_invariant(const struct lu_object *l)
         return osd_invariant(osd_obj(l));
 }
 
-#ifdef HAVE_QUOTA_SUPPORT
-static inline void
-osd_push_ctxt(const struct lu_env *env, struct osd_ctxt *save)
-{
-        struct md_ucred    *uc = md_ucred(env);
-        struct cred        *tc;
-
-        LASSERT(uc != NULL);
-
-        save->oc_uid = current_fsuid();
-        save->oc_gid = current_fsgid();
-        save->oc_cap = current_cap();
-        if ((tc = prepare_creds())) {
-                tc->fsuid         = uc->mu_fsuid;
-                tc->fsgid         = uc->mu_fsgid;
-                commit_creds(tc);
-        }
-        /* XXX not suboptimal */
-        cfs_curproc_cap_unpack(uc->mu_cap);
-}
-
-static inline void
-osd_pop_ctxt(struct osd_ctxt *save)
-{
-        struct cred *tc;
-
-        if ((tc = prepare_creds())) {
-                tc->fsuid         = save->oc_uid;
-                tc->fsgid         = save->oc_gid;
-                tc->cap_effective = save->oc_cap;
-                commit_creds(tc);
-        }
-}
-#endif
-
-static inline struct osd_thread_info *osd_oti_get(const struct lu_env *env)
-{
-        return lu_context_key_get(&env->le_ctx, &osd_key);
-}
-
 /*
  * Concurrency: doesn't matter
  */
@@ -271,10 +122,7 @@ static int osd_write_locked(const struct lu_env *env, struct osd_object *o)
 static int osd_root_get(const struct lu_env *env,
                         struct dt_device *dev, struct lu_fid *f)
 {
-        struct inode *inode;
-
-        inode = osd_sb(osd_dt_dev(dev))->s_root->d_inode;
-        LU_IGIF_BUILD(f, inode->i_ino, inode->i_generation);
+        lu_local_obj_fid(f, OSD_FS_ROOT_OID);
         return 0;
 }
 
@@ -298,123 +146,276 @@ static struct lu_object *osd_object_alloc(const struct lu_env *env,
 
                 l = &mo->oo_dt.do_lu;
                 dt_object_init(&mo->oo_dt, NULL, d);
-                if (osd_dev(d)->od_iop_mode)
-                        mo->oo_dt.do_ops = &osd_obj_ea_ops;
-                else
-                        mo->oo_dt.do_ops = &osd_obj_ops;
-
+               mo->oo_dt.do_ops = &osd_obj_ea_ops;
                 l->lo_ops = &osd_lu_obj_ops;
-                cfs_init_rwsem(&mo->oo_sem);
-                cfs_init_rwsem(&mo->oo_ext_idx_sem);
-                cfs_spin_lock_init(&mo->oo_guard);
+               init_rwsem(&mo->oo_sem);
+               init_rwsem(&mo->oo_ext_idx_sem);
+               spin_lock_init(&mo->oo_guard);
                 return l;
-        } else
+        } else {
                 return NULL;
+        }
+}
+
+static int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
+                      struct dentry *dentry, struct lustre_mdt_attrs *lma)
+{
+       int rc;
+
+       dentry->d_inode = inode;
+       rc = inode->i_op->getxattr(dentry, XATTR_NAME_LMA, (void *)lma,
+                                  sizeof(*lma));
+       if (rc == -ERANGE) {
+               /* try with old lma size */
+               rc = inode->i_op->getxattr(dentry, XATTR_NAME_LMA,
+                                          info->oti_mdt_attrs_old,
+                                          LMA_OLD_SIZE);
+               if (rc > 0)
+                       memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
+       }
+       if (rc > 0) {
+               /* Check LMA compatibility */
+               if (lma->lma_incompat & ~cpu_to_le32(LMA_INCOMPAT_SUPP)) {
+                       CWARN("%.16s: unsupported incompat LMA feature(s) "
+                             "%lx/%#x\n",
+                             LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+                             inode->i_ino, le32_to_cpu(lma->lma_incompat) &
+                                                       ~LMA_INCOMPAT_SUPP);
+                       rc = -ENOSYS;
+               } else {
+                       lustre_lma_swab(lma);
+                       rc = 0;
+               }
+       } else if (rc == 0) {
+               rc = -ENODATA;
+       }
+
+       return rc;
 }
 
 /*
  * retrieve object from backend ext fs.
  **/
-static struct inode *osd_iget(struct osd_thread_info *info,
-                              struct osd_device *dev,
-                              const struct osd_inode_id *id)
-{
-        struct inode *inode = NULL;
-
-#ifdef HAVE_EXT4_LDISKFS
-        inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
-        if (IS_ERR(inode))
-        /* Newer kernels return an error instead of a NULL pointer */
-                inode = NULL;
-#else
-        inode = iget(osd_sb(dev), id->oii_ino);
-#endif
-        if (inode == NULL) {
-                CERROR("no inode\n");
-                inode = ERR_PTR(-EACCES);
-        } else if (id->oii_gen != OSD_OII_NOGEN &&
-                   inode->i_generation != id->oii_gen) {
-                iput(inode);
-                inode = ERR_PTR(-ESTALE);
-        } else if (inode->i_nlink == 0) {
-                /* due to parallel readdir and unlink,
-                * we can have dead inode here. */
-                CWARN("stale inode\n");
-                make_bad_inode(inode);
-                iput(inode);
-                inode = ERR_PTR(-ESTALE);
-        } else if (is_bad_inode(inode)) {
-                CERROR("bad inode %lx\n",inode->i_ino);
-                iput(inode);
-                inode = ERR_PTR(-ENOENT);
-        } else {
-                /* Do not update file c/mtime in ldiskfs.
-                 * NB: we don't have any lock to protect this because we don't
-                 * have reference on osd_object now, but contention with
-                 * another lookup + attr_set can't happen in the tiny window
-                 * between if (...) and set S_NOCMTIME. */
-                if (!(inode->i_flags & S_NOCMTIME))
-                        inode->i_flags |= S_NOCMTIME;
+struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
+                      struct osd_inode_id *id)
+{
+       struct inode *inode = NULL;
+
+       inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
+       if (IS_ERR(inode)) {
+               CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
+                      id->oii_ino, PTR_ERR(inode));
+       } else if (id->oii_gen != OSD_OII_NOGEN &&
+                  inode->i_generation != id->oii_gen) {
+               CDEBUG(D_INODE, "unmatched inode: ino = %u, gen0 = %u, "
+                      "gen1 = %u\n",
+                      id->oii_ino, id->oii_gen, inode->i_generation);
+               iput(inode);
+               inode = ERR_PTR(-ESTALE);
+       } else if (inode->i_nlink == 0) {
+               /* due to parallel readdir and unlink,
+               * we can have dead inode here. */
+               CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
+               make_bad_inode(inode);
+               iput(inode);
+               inode = ERR_PTR(-ESTALE);
+       } else if (is_bad_inode(inode)) {
+               CWARN("%.16s: bad inode: ino = %u\n",
+               LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name, id->oii_ino);
+               iput(inode);
+               inode = ERR_PTR(-ENOENT);
+       } else {
+               if (id->oii_gen == OSD_OII_NOGEN)
+                       osd_id_gen(id, inode->i_ino, inode->i_generation);
+
+               /* Do not update file c/mtime in ldiskfs.
+                * NB: we don't have any lock to protect this because we don't
+                * have reference on osd_object now, but contention with
+                * another lookup + attr_set can't happen in the tiny window
+                * between if (...) and set S_NOCMTIME. */
+               if (!(inode->i_flags & S_NOCMTIME))
+                       inode->i_flags |= S_NOCMTIME;
+       }
+       return inode;
+}
+
+struct inode *osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
+                          struct osd_inode_id *id, struct lu_fid *fid)
+{
+       struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
+       struct inode            *inode;
+       int                      rc;
+
+       inode = osd_iget(info, dev, id);
+       if (IS_ERR(inode))
+               return inode;
+
+       rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
+       if (rc == 0) {
+               *fid = lma->lma_self_fid;
+       } else if (rc == -ENODATA) {
+               LU_IGIF_BUILD(fid, inode->i_ino, inode->i_generation);
+       } else {
+               iput(inode);
+               inode = ERR_PTR(rc);
+       }
+       return inode;
+}
+
+static struct inode *
+osd_iget_verify(struct osd_thread_info *info, struct osd_device *dev,
+               struct osd_inode_id *id, const struct lu_fid *fid)
+{
+       struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
+       struct inode            *inode;
+       int                      rc;
+
+       inode = osd_iget(info, dev, id);
+       if (IS_ERR(inode))
+               return inode;
+
+       rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
+       if (rc == -ENODATA)
+               return inode;
+
+       if (rc != 0) {
+               iput(inode);
+               return ERR_PTR(rc);
+       }
+
+       if (!lu_fid_eq(fid, &lma->lma_self_fid)) {
+               CDEBUG(D_LFSCK, "inconsistent obj: "DFID", %lu, "DFID"\n",
+                      PFID(&lma->lma_self_fid), inode->i_ino, PFID(fid));
+               iput(inode);
+               return ERR_PTR(-EREMCHG);
+       }
+
+       return inode;
+}
+
+static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
+                         const struct lu_fid *fid,
+                         const struct lu_object_conf *conf)
+{
+       struct osd_thread_info *info;
+       struct lu_device       *ldev   = obj->oo_dt.do_lu.lo_dev;
+       struct osd_device      *dev;
+       struct osd_idmap_cache *oic;
+       struct osd_inode_id    *id;
+       struct inode           *inode;
+       struct osd_scrub       *scrub;
+       struct scrub_file      *sf;
+       int                     result;
+       int                     verify = 0;
+       ENTRY;
+
+       LINVRNT(osd_invariant(obj));
+       LASSERT(obj->oo_inode == NULL);
+       LASSERTF(fid_is_sane(fid) || fid_is_idif(fid), DFID, PFID(fid));
+
+       dev = osd_dev(ldev);
+       scrub = &dev->od_scrub;
+       sf = &scrub->os_file;
+       info = osd_oti_get(env);
+       LASSERT(info);
+       oic = &info->oti_cache;
+
+       if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
+               RETURN(-ENOENT);
+
+       /* Search order: 1. per-thread cache. */
+       if (lu_fid_eq(fid, &oic->oic_fid)) {
+               id = &oic->oic_lid;
+               goto iget;
+       }
+
+       id = &info->oti_id;
+       if (!cfs_list_empty(&scrub->os_inconsistent_items)) {
+               /* Search order: 2. OI scrub pending list. */
+               result = osd_oii_lookup(dev, fid, id);
+               if (result == 0)
+                       goto iget;
+       }
+
+       if (sf->sf_flags & SF_INCONSISTENT)
+               verify = 1;
+
+       /*
+        * Objects are created as locking anchors or place holders for objects
+        * yet to be created. No need to osd_oi_lookup() at here because FID
+        * shouldn't never be re-used, if it's really a duplicate FID from
+        * unexpected reason, we should be able to detect it later by calling
+        * do_create->osd_oi_insert()
+        */
+       if (conf != NULL && (conf->loc_flags & LOC_F_NEW) != 0)
+               GOTO(out, result = 0);
+
+       /* Search order: 3. OI files. */
+       result = osd_oi_lookup(info, dev, fid, id);
+       if (result == -ENOENT) {
+               if (!fid_is_norm(fid) ||
+                   !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
+                                     sf->sf_oi_bitmap))
+                       GOTO(out, result = 0);
+
+               goto trigger;
+       }
+
+       if (result != 0)
+               GOTO(out, result);
+
+iget:
+       if (verify == 0)
+               inode = osd_iget(info, dev, id);
+       else
+               inode = osd_iget_verify(info, dev, id, fid);
+       if (IS_ERR(inode)) {
+               result = PTR_ERR(inode);
+               if (result == -ENOENT || result == -ESTALE) {
+                       fid_zero(&oic->oic_fid);
+                       result = 0;
+               } else if (result == -EREMCHG) {
+
+trigger:
+                       if (thread_is_running(&scrub->os_thread)) {
+                               result = -EINPROGRESS;
+                       } else if (!dev->od_noscrub) {
+                               result = osd_scrub_start(dev);
+                               LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC "
+                                              "for "DFID", rc = %d [1]\n",
+                                              LDISKFS_SB(osd_sb(dev))->s_es->\
+                                              s_volume_name,PFID(fid), result);
+                               if (result == 0 || result == -EALREADY)
+                                       result = -EINPROGRESS;
+                               else
+                                       result = -EREMCHG;
+                       }
+               }
+
+                GOTO(out, result);
         }
-        return inode;
-}
-
-static int osd_fid_lookup(const struct lu_env *env,
-                          struct osd_object *obj, const struct lu_fid *fid)
-{
-        struct osd_thread_info *info;
-        struct lu_device       *ldev = obj->oo_dt.do_lu.lo_dev;
-        struct osd_device      *dev;
-        struct osd_inode_id    *id;
-        struct osd_oi          *oi;
-        struct inode           *inode;
-        int                     result;
-
-        LINVRNT(osd_invariant(obj));
-        LASSERT(obj->oo_inode == NULL);
-        LASSERT(fid_is_sane(fid) || osd_fid_is_root(fid));
-        /*
-         * This assertion checks that osd layer sees only local
-         * fids. Unfortunately it is somewhat expensive (does a
-         * cache-lookup). Disabling it for production/acceptance-testing.
-         */
-        LASSERT(1 || fid_is_local(env, ldev->ld_site, fid));
 
-        ENTRY;
+        obj->oo_inode = inode;
+        LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
 
-        info = osd_oti_get(env);
-        dev  = osd_dev(ldev);
-        id   = &info->oti_id;
-        oi   = &dev->od_oi;
+       obj->oo_compat_dot_created = 1;
+       obj->oo_compat_dotdot_created = 1;
 
-        if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
-                RETURN(-ENOENT);
+        if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
+               GOTO(out, result = 0);
 
-        result = osd_oi_lookup(info, oi, fid, id);
-        if (result == 0) {
-                inode = osd_iget(info, dev, id);
-                if (!IS_ERR(inode)) {
-                        obj->oo_inode = inode;
-                        LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
-                        if (dev->od_iop_mode) {
-                                obj->oo_compat_dot_created = 1;
-                                obj->oo_compat_dotdot_created = 1;
-                        }
-                        result = 0;
-                } else
-                        /*
-                         * If fid wasn't found in oi, inode-less object is
-                         * created, for which lu_object_exists() returns
-                         * false. This is used in a (frequent) case when
-                         * objects are created as locking anchors or
-                         * place holders for objects yet to be created.
-                         */
-                        result = PTR_ERR(inode);
-        } else if (result == -ENOENT)
-                result = 0;
-        LINVRNT(osd_invariant(obj));
+       LASSERT(obj->oo_hl_head == NULL);
+       obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
+       if (obj->oo_hl_head == NULL) {
+               obj->oo_inode = NULL;
+               iput(inode);
+               GOTO(out, result = -ENOMEM);
+       }
+       GOTO(out, result = 0);
 
-        RETURN(result);
+out:
+       LINVRNT(osd_invariant(obj));
+       return result;
 }
 
 /*
@@ -433,20 +434,26 @@ static void osd_object_init0(struct osd_object *obj)
  * life-cycle.
  */
 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
-                           const struct lu_object_conf *unused)
+                          const struct lu_object_conf *conf)
 {
-        struct osd_object *obj = osd_obj(l);
-        int result;
+       struct osd_object *obj = osd_obj(l);
+       int result;
 
-        LINVRNT(osd_invariant(obj));
+       LINVRNT(osd_invariant(obj));
 
-        result = osd_fid_lookup(env, obj, lu_object_fid(l));
-        if (result == 0) {
-                if (obj->oo_inode != NULL)
-                        osd_object_init0(obj);
-        }
-        LINVRNT(osd_invariant(obj));
-        return result;
+       result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
+       obj->oo_dt.do_body_ops = &osd_body_ops_new;
+       if (result == 0) {
+               if (obj->oo_inode != NULL) {
+                       osd_object_init0(obj);
+               } else 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;
+               }
+       }
+       LINVRNT(osd_invariant(obj));
+       return result;
 }
 
 /*
@@ -460,33 +467,11 @@ static void osd_object_free(const struct lu_env *env, struct lu_object *l)
         LINVRNT(osd_invariant(obj));
 
         dt_object_fini(&obj->oo_dt);
+        if (obj->oo_hl_head != NULL)
+                ldiskfs_htree_lock_head_free(obj->oo_hl_head);
         OBD_FREE_PTR(obj);
 }
 
-/**
- * IAM Iterator
- */
-static struct iam_path_descr *osd_it_ipd_get(const struct lu_env *env,
-                                             const struct iam_container *bag)
-{
-        return bag->ic_descr->id_ops->id_ipd_alloc(bag,
-                                           osd_oti_get(env)->oti_it_ipd);
-}
-
-static struct iam_path_descr *osd_idx_ipd_get(const struct lu_env *env,
-                                              const struct iam_container *bag)
-{
-        return bag->ic_descr->id_ops->id_ipd_alloc(bag,
-                                           osd_oti_get(env)->oti_idx_ipd);
-}
-
-static void osd_ipd_put(const struct lu_env *env,
-                        const struct iam_container *bag,
-                        struct iam_path_descr *ipd)
-{
-        bag->ic_descr->id_ops->id_ipd_free(ipd);
-}
-
 /*
  * Concurrency: no concurrent access is possible that late in object
  * life-cycle.
@@ -544,8 +529,7 @@ static void osd_th_started(struct osd_thandle *oth)
 
 /**
  * Helper function to convert time interval to microseconds packed in
- * long int (default time units for the counter in "stats" initialized
- * by lu_time_init() )
+ * long int.
  */
 static long interval_to_usec(cfs_time_t start, cfs_time_t end)
 {
@@ -605,37 +589,44 @@ static void __osd_th_check_slow(void *oth, struct osd_device *dev,
 /*
  * Concurrency: doesn't access mutable data.
  */
-static int osd_param_is_sane(const struct osd_device *dev,
-                             const struct txn_param *param)
+static int osd_param_is_not_sane(const struct osd_device *dev,
+                                const struct thandle *th)
 {
-        return param->tp_credits <= osd_journal(dev)->j_max_transaction_buffers;
+       struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
+
+       return oh->ot_credits > osd_journal(dev)->j_max_transaction_buffers;
 }
 
 /*
  * Concurrency: shouldn't matter.
  */
+#ifdef HAVE_LDISKFS_JOURNAL_CALLBACK_ADD
+static void osd_trans_commit_cb(struct super_block *sb,
+                                struct journal_callback *jcb, int error)
+#else
 static void osd_trans_commit_cb(struct journal_callback *jcb, int error)
+#endif
 {
         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
         struct thandle     *th  = &oh->ot_super;
-        struct dt_device   *dev = th->th_dev;
-        struct lu_device   *lud = &dev->dd_lu_dev;
+        struct lu_device   *lud = &th->th_dev->dd_lu_dev;
+        struct dt_txn_commit_cb *dcb, *tmp;
 
-        LASSERT(dev != NULL);
         LASSERT(oh->ot_handle == NULL);
 
-        if (error) {
+        if (error)
                 CERROR("transaction @0x%p commit error: %d\n", th, error);
-        } else {
-                struct lu_env *env = &osd_dt_dev(dev)->od_env_for_commit;
-                /*
-                 * This od_env_for_commit is only for commit usage.  see
-                 * "struct dt_device"
-                 */
-                lu_context_enter(&env->le_ctx);
-                dt_txn_hook_commit(env, th);
-                lu_context_exit(&env->le_ctx);
-        }
+
+        dt_txn_hook_commit(th);
+
+       /* call per-transaction callbacks if any */
+       cfs_list_for_each_entry_safe(dcb, tmp, &oh->ot_dcb_list, dcb_linkage) {
+               LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
+                        "commit callback entry: magic=%x name='%s'\n",
+                        dcb->dcb_magic, dcb->dcb_name);
+               cfs_list_del_init(&dcb->dcb_linkage);
+               dcb->dcb_func(NULL, th, dcb, error);
+       }
 
         lu_ref_del_at(&lud->ld_reference, oh->ot_dev_link, "osd-tx", th);
         lu_device_put(lud);
@@ -646,129 +637,202 @@ static void osd_trans_commit_cb(struct journal_callback *jcb, int error)
         OBD_FREE_PTR(oh);
 }
 
+static struct thandle *osd_trans_create(const struct lu_env *env,
+                                        struct dt_device *d)
+{
+        struct osd_thread_info *oti = osd_oti_get(env);
+        struct osd_iobuf       *iobuf = &oti->oti_iobuf;
+        struct osd_thandle     *oh;
+        struct thandle         *th;
+        ENTRY;
+
+        /* on pending IO in this thread should left from prev. request */
+        LASSERT(cfs_atomic_read(&iobuf->dr_numreqs) == 0);
+
+        th = ERR_PTR(-ENOMEM);
+        OBD_ALLOC_GFP(oh, sizeof *oh, CFS_ALLOC_IO);
+        if (oh != NULL) {
+               oh->ot_quota_trans = &oti->oti_quota_trans;
+               memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
+                th = &oh->ot_super;
+                th->th_dev = d;
+                th->th_result = 0;
+                th->th_tags = LCT_TX_HANDLE;
+                oh->ot_credits = 0;
+                oti->oti_dev = osd_dt_dev(d);
+                CFS_INIT_LIST_HEAD(&oh->ot_dcb_list);
+                osd_th_alloced(oh);
+        }
+        RETURN(th);
+}
+
 /*
  * Concurrency: shouldn't matter.
  */
-static struct thandle *osd_trans_start(const struct lu_env *env,
-                                       struct dt_device *d,
-                                       struct txn_param *p)
+int osd_trans_start(const struct lu_env *env, struct dt_device *d,
+                    struct thandle *th)
 {
+        struct osd_thread_info *oti = osd_oti_get(env);
         struct osd_device  *dev = osd_dt_dev(d);
         handle_t           *jh;
         struct osd_thandle *oh;
-        struct thandle     *th;
-        int hook_res;
+        int rc;
 
         ENTRY;
 
-        hook_res = dt_txn_hook_start(env, d, p);
-        if (hook_res != 0)
-                RETURN(ERR_PTR(hook_res));
-
-        if (osd_param_is_sane(dev, p)) {
-                OBD_ALLOC_GFP(oh, sizeof *oh, CFS_ALLOC_IO);
-                if (oh != NULL) {
-                        struct osd_thread_info *oti = osd_oti_get(env);
-
-                        /*
-                         * XXX temporary stuff. Some abstraction layer should
-                         * be used.
-                         */
-                        oti->oti_dev = dev;
-                        osd_th_alloced(oh);
-                        jh = ldiskfs_journal_start_sb(osd_sb(dev), p->tp_credits);
-                        osd_th_started(oh);
-                        if (!IS_ERR(jh)) {
-                                oh->ot_handle = jh;
-                                th = &oh->ot_super;
-                                th->th_dev = d;
-                                th->th_result = 0;
-                                jh->h_sync = p->tp_sync;
-                                lu_device_get(&d->dd_lu_dev);
-                                oh->ot_dev_link = lu_ref_add
-                                        (&d->dd_lu_dev.ld_reference,
-                                         "osd-tx", th);
-                                /* add commit callback */
-                                lu_context_init(&th->th_ctx, LCT_TX_HANDLE);
-                                lu_context_enter(&th->th_ctx);
-                                osd_journal_callback_set(jh, osd_trans_commit_cb,
-                                                         (struct journal_callback *)&oh->ot_jcb);
-                                        LASSERT(oti->oti_txns == 0);
-                                        LASSERT(oti->oti_r_locks == 0);
-                                        LASSERT(oti->oti_w_locks == 0);
-                                        oti->oti_txns++;
-                        } else {
-                                OBD_FREE_PTR(oh);
-                                th = (void *)jh;
-                        }
-                } else
-                        th = ERR_PTR(-ENOMEM);
+        LASSERT(current->journal_info == NULL);
+
+        oh = container_of0(th, struct osd_thandle, ot_super);
+        LASSERT(oh != NULL);
+        LASSERT(oh->ot_handle == NULL);
+
+        rc = dt_txn_hook_start(env, d, th);
+        if (rc != 0)
+                GOTO(out, rc);
+
+       if (unlikely(osd_param_is_not_sane(dev, th))) {
+               static unsigned long last_printed;
+               static int last_credits;
+
+               CWARN("%.16s: too many transaction credits (%d > %d)\n",
+                     LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
+                     oh->ot_credits,
+                     osd_journal(dev)->j_max_transaction_buffers);
+#ifdef OSD_TRACK_DECLARES
+               CWARN("  create: %u/%u, delete: %u/%u, destroy: %u/%u\n",
+                     oh->ot_declare_create, oh->ot_declare_create_cred,
+                     oh->ot_declare_delete, oh->ot_declare_delete_cred,
+                     oh->ot_declare_destroy, oh->ot_declare_destroy_cred);
+               CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
+                     oh->ot_declare_attr_set, oh->ot_declare_attr_set_cred,
+                     oh->ot_declare_xattr_set, oh->ot_declare_xattr_set_cred);
+               CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
+                     oh->ot_declare_write, oh->ot_declare_write_cred,
+                     oh->ot_declare_punch, oh->ot_declare_punch_cred,
+                     oh->ot_declare_quota, oh->ot_declare_quota_cred);
+               CWARN("  insert: %u/%u, delete: %u/%u\n",
+                     oh->ot_declare_insert, oh->ot_declare_insert_cred,
+                     oh->ot_declare_delete, oh->ot_declare_destroy_cred);
+               CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
+                     oh->ot_declare_ref_add, oh->ot_declare_ref_add_cred,
+                     oh->ot_declare_ref_del, oh->ot_declare_ref_del_cred);
+
+               if (last_credits != oh->ot_credits &&
+                   time_after(jiffies, last_printed + 60 * HZ)) {
+                       libcfs_debug_dumpstack(NULL);
+                       last_credits = oh->ot_credits;
+                       last_printed = jiffies;
+               }
+#endif
+               /* XXX Limit the credits to 'max_transaction_buffers', and
+                *     let the underlying filesystem to catch the error if
+                *     we really need so many credits.
+                *
+                *     This should be removed when we can calculate the
+                *     credits precisely. */
+               oh->ot_credits = osd_journal(dev)->j_max_transaction_buffers;
+       }
+
+        /*
+         * XXX temporary stuff. Some abstraction layer should
+         * be used.
+         */
+        jh = ldiskfs_journal_start_sb(osd_sb(dev), oh->ot_credits);
+        osd_th_started(oh);
+        if (!IS_ERR(jh)) {
+                oh->ot_handle = jh;
+                LASSERT(oti->oti_txns == 0);
+                lu_context_init(&th->th_ctx, th->th_tags);
+                lu_context_enter(&th->th_ctx);
+
+                lu_device_get(&d->dd_lu_dev);
+                oh->ot_dev_link = lu_ref_add(&d->dd_lu_dev.ld_reference,
+                                             "osd-tx", th);
+                oti->oti_txns++;
+                rc = 0;
         } else {
-                CERROR("Invalid transaction parameters\n");
-                th = ERR_PTR(-EINVAL);
+                rc = PTR_ERR(jh);
         }
-
-        RETURN(th);
+out:
+        RETURN(rc);
 }
 
 /*
  * Concurrency: shouldn't matter.
  */
-static void osd_trans_stop(const struct lu_env *env, struct thandle *th)
+static int osd_trans_stop(const struct lu_env *env, struct thandle *th)
 {
-        int result;
-        struct osd_thandle *oh;
+        int                     rc = 0;
+        struct osd_thandle     *oh;
         struct osd_thread_info *oti = osd_oti_get(env);
-
+        struct osd_iobuf       *iobuf = &oti->oti_iobuf;
+       struct qsd_instance    *qsd = oti->oti_dev->od_quota_slave;
         ENTRY;
 
         oh = container_of0(th, struct osd_thandle, ot_super);
+
+       if (qsd != NULL)
+               /* inform the quota slave device that the transaction is
+                * stopping */
+               qsd_op_end(env, qsd, oh->ot_quota_trans);
+       oh->ot_quota_trans = NULL;
+
         if (oh->ot_handle != NULL) {
                 handle_t *hdl = oh->ot_handle;
 
+                /*
+                 * add commit callback
+                 * notice we don't do this in osd_trans_start()
+                 * as underlying transaction can change during truncate
+                 */
+                osd_journal_callback_set(hdl, osd_trans_commit_cb,
+                                         &oh->ot_jcb);
+
                 LASSERT(oti->oti_txns == 1);
                 oti->oti_txns--;
-                LASSERT(oti->oti_r_locks == 0);
-                LASSERT(oti->oti_w_locks == 0);
-                result = dt_txn_hook_stop(env, th);
-                if (result != 0)
-                        CERROR("Failure in transaction hook: %d\n", result);
+                rc = dt_txn_hook_stop(env, th);
+                if (rc != 0)
+                        CERROR("Failure in transaction hook: %d\n", rc);
+
+               /* hook functions might modify th_sync */
+               hdl->h_sync = th->th_sync;
+
                 oh->ot_handle = NULL;
                 OSD_CHECK_SLOW_TH(oh, oti->oti_dev,
-                                  result = ldiskfs_journal_stop(hdl));
-                if (result != 0)
-                        CERROR("Failure to stop transaction: %d\n", result);
+                                  rc = ldiskfs_journal_stop(hdl));
+                if (rc != 0)
+                        CERROR("Failure to stop transaction: %d\n", rc);
+        } else {
+                OBD_FREE_PTR(oh);
         }
-        EXIT;
+
+        /* as we want IO to journal and data IO be concurrent, we don't block
+         * awaiting data IO completion in osd_do_bio(), instead we wait here
+         * once transaction is submitted to the journal. all reqular requests
+         * don't do direct IO (except read/write), thus this wait_event becomes
+         * no-op for them.
+         *
+         * IMPORTANT: we have to wait till any IO submited by the thread is
+         * completed otherwise iobuf may be corrupted by different request
+         */
+        cfs_wait_event(iobuf->dr_wait,
+                       cfs_atomic_read(&iobuf->dr_numreqs) == 0);
+        if (!rc)
+                rc = iobuf->dr_error;
+
+        RETURN(rc);
 }
 
-/*
- * Concurrency: no concurrent access is possible that late in object
- * life-cycle.
- */
-static int osd_inode_remove(const struct lu_env *env, struct osd_object *obj)
+static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
 {
-        const struct lu_fid    *fid = lu_object_fid(&obj->oo_dt.do_lu);
-        struct osd_device      *osd = osd_obj2dev(obj);
-        struct osd_thread_info *oti = osd_oti_get(env);
-        struct txn_param       *prm = &oti->oti_txn;
-        struct lu_env          *env_del_obj = &oti->oti_obj_delete_tx_env;
-        struct thandle         *th;
-        int result;
+       struct osd_thandle *oh = container_of0(th, struct osd_thandle,
+                                              ot_super);
 
-        lu_env_init(env_del_obj, LCT_DT_THREAD);
-        txn_param_init(prm, OSD_TXN_OI_DELETE_CREDITS +
-                            OSD_TXN_INODE_DELETE_CREDITS);
-        th = osd_trans_start(env_del_obj, &osd->od_dt_dev, prm);
-        if (!IS_ERR(th)) {
-                result = osd_oi_delete(osd_oti_get(env_del_obj),
-                                       &osd->od_oi, fid, th);
-                osd_trans_stop(env_del_obj, th);
-        } else
-                result = PTR_ERR(th);
+       LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
+       LASSERT(&dcb->dcb_func != NULL);
+       cfs_list_add(&dcb->dcb_linkage, &oh->ot_dcb_list);
 
-        lu_env_fini(env_del_obj);
-        return result;
+       return 0;
 }
 
 /*
@@ -791,18 +855,24 @@ static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 
         osd_index_fini(obj);
         if (inode != NULL) {
-                int result;
-
-                if (osd_inode_unlinked(inode)) {
-                        result = osd_inode_remove(env, obj);
-                        if (result != 0)
-                                LU_OBJECT_DEBUG(D_ERROR, env, l,
-                                                "Failed to cleanup: %d\n",
-                                                result);
-                }
+               struct qsd_instance     *qsd = osd_obj2dev(obj)->od_quota_slave;
+               qid_t                    uid = inode->i_uid;
+               qid_t                    gid = inode->i_gid;
 
                 iput(inode);
                 obj->oo_inode = NULL;
+
+               if (qsd != NULL) {
+                       struct osd_thread_info  *info = osd_oti_get(env);
+                       struct lquota_id_info   *qi = &info->oti_qi;
+
+                       /* Release granted quota to master if necessary */
+                       qi->lqi_id.qid_uid = uid;
+                       qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
+
+                       qi->lqi_id.qid_uid = gid;
+                       qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
+               }
         }
 }
 
@@ -812,11 +882,6 @@ static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 static void osd_object_release(const struct lu_env *env,
                                struct lu_object *l)
 {
-        struct osd_object *o = osd_obj(l);
-
-        LASSERT(!lu_object_is_dying(l->lo_header));
-        if (o->oo_inode != NULL && osd_inode_unlinked(o->oo_inode))
-                cfs_set_bit(LU_OBJECT_HEARD_BANSHEE, &l->lo_header->loh_flags);
 }
 
 /*
@@ -832,7 +897,8 @@ static int osd_object_print(const struct lu_env *env, void *cookie,
                 d = o->oo_dir->od_container.ic_descr;
         else
                 d = NULL;
-        return (*p)(env, cookie, LUSTRE_OSD_NAME"-object@%p(i:%p:%lu/%u)[%s]",
+       return (*p)(env, cookie,
+                   LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
                     o, o->oo_inode,
                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
                     o->oo_inode ? o->oo_inode->i_generation : 0,
@@ -843,27 +909,58 @@ static int osd_object_print(const struct lu_env *env, void *cookie,
  * Concurrency: shouldn't matter.
  */
 int osd_statfs(const struct lu_env *env, struct dt_device *d,
-               cfs_kstatfs_t *sfs)
+               struct obd_statfs *sfs)
 {
-        struct osd_device *osd = osd_dt_dev(d);
+        struct osd_device  *osd = osd_dt_dev(d);
         struct super_block *sb = osd_sb(osd);
+        struct kstatfs     *ksfs;
         int result = 0;
 
-        cfs_spin_lock(&osd->od_osfs_lock);
-        /* cache 1 second */
-        if (cfs_time_before_64(osd->od_osfs_age, cfs_time_shift_64(-1))) {
-                result = ll_do_statfs(sb, &osd->od_kstatfs);
-                if (likely(result == 0)) /* N.B. statfs can't really fail */
-                        osd->od_osfs_age = cfs_time_current_64();
+       if (unlikely(osd->od_mnt == NULL))
+               return -EINPROGRESS;
+
+        /* osd_lproc.c call this without env, allocate ksfs for that case */
+        if (unlikely(env == NULL)) {
+                OBD_ALLOC_PTR(ksfs);
+                if (ksfs == NULL)
+                        return -ENOMEM;
+        } else {
+                ksfs = &osd_oti_get(env)->oti_ksfs;
         }
 
-        if (likely(result == 0))
-                *sfs = osd->od_kstatfs;
-        cfs_spin_unlock(&osd->od_osfs_lock);
+       spin_lock(&osd->od_osfs_lock);
+       /* cache 1 second */
+       if (cfs_time_before_64(osd->od_osfs_age, cfs_time_shift_64(-1))) {
+               result = sb->s_op->statfs(sb->s_root, ksfs);
+               if (likely(result == 0)) { /* N.B. statfs can't really fail */
+                       osd->od_osfs_age = cfs_time_current_64();
+                       statfs_pack(&osd->od_statfs, ksfs);
+                       if (sb->s_flags & MS_RDONLY)
+                               sfs->os_state = OS_STATE_READONLY;
+               }
+       }
+
+       if (likely(result == 0))
+               *sfs = osd->od_statfs;
+       spin_unlock(&osd->od_osfs_lock);
+
+        if (unlikely(env == NULL))
+                OBD_FREE_PTR(ksfs);
 
         return result;
 }
 
+/**
+ * Estimate space needed for file creations. We assume the largest filename
+ * which is 2^64 - 1, hence a filename of 20 chars.
+ * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
+ */
+#ifdef __LDISKFS_DIR_REC_LEN
+#define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
+#else
+#define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
+#endif
+
 /*
  * Concurrency: doesn't access mutable data.
  */
@@ -871,12 +968,38 @@ static void osd_conf_get(const struct lu_env *env,
                          const struct dt_device *dev,
                          struct dt_device_param *param)
 {
+        struct super_block *sb = osd_sb(osd_dt_dev(dev));
+
         /*
          * XXX should be taken from not-yet-existing fs abstraction layer.
          */
-        param->ddp_max_name_len  = LDISKFS_NAME_LEN;
-        param->ddp_max_nlink     = LDISKFS_LINK_MAX;
-        param->ddp_block_shift   = osd_sb(osd_dt_dev(dev))->s_blocksize_bits;
+       param->ddp_mnt = osd_dt_dev(dev)->od_mnt;
+        param->ddp_max_name_len = LDISKFS_NAME_LEN;
+        param->ddp_max_nlink    = LDISKFS_LINK_MAX;
+       param->ddp_block_shift  = sb->s_blocksize_bits;
+       param->ddp_mount_type     = LDD_MT_LDISKFS;
+       param->ddp_maxbytes       = sb->s_maxbytes;
+       /* Overhead estimate should be fairly accurate, so we really take a tiny
+        * error margin which also avoids fragmenting the filesystem too much */
+       param->ddp_grant_reserved = 2; /* end up to be 1.9% after conversion */
+       /* inode are statically allocated, so per-inode space consumption
+        * is the space consumed by the directory entry */
+       param->ddp_inodespace     = PER_OBJ_USAGE;
+       /* per-fragment overhead to be used by the client code */
+       param->ddp_grant_frag     = 6 * LDISKFS_BLOCK_SIZE(sb);
+        param->ddp_mntopts      = 0;
+        if (test_opt(sb, XATTR_USER))
+                param->ddp_mntopts |= MNTOPT_USERXATTR;
+        if (test_opt(sb, POSIX_ACL))
+                param->ddp_mntopts |= MNTOPT_ACL;
+
+#if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
+        if (LDISKFS_HAS_INCOMPAT_FEATURE(sb, LDISKFS_FEATURE_INCOMPAT_EA_INODE))
+                param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE;
+        else
+#endif
+                param->ddp_max_ea_size = sb->s_blocksize;
+
 }
 
 /**
@@ -897,7 +1020,7 @@ static struct lu_buf *osd_buf_get(const struct lu_env *env, void *area, ssize_t
  */
 static int osd_sync(const struct lu_env *env, struct dt_device *d)
 {
-        CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_NAME);
+       CDEBUG(D_HA, "syncing OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
         return ldiskfs_force_commit(osd_sb(osd_dt_dev(d)));
 }
 
@@ -919,27 +1042,26 @@ static int osd_commit_async(const struct lu_env *env,
         struct super_block *s = osd_sb(osd_dt_dev(d));
         ENTRY;
 
-        CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_NAME);
+       CDEBUG(D_HA, "async commit OSD %s\n", LUSTRE_OSD_LDISKFS_NAME);
         RETURN(s->s_op->sync_fs(s, 0));
 }
 
 /*
  * Concurrency: shouldn't matter.
  */
-lvfs_sbdev_type fsfilt_ldiskfs_journal_sbdev(struct super_block *);
 
-static void osd_ro(const struct lu_env *env, struct dt_device *d)
+static int osd_ro(const struct lu_env *env, struct dt_device *d)
 {
+        struct super_block *sb = osd_sb(osd_dt_dev(d));
+        int rc;
         ENTRY;
 
-        CERROR("*** setting device %s read-only ***\n", LUSTRE_OSD_NAME);
+       CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
 
-        __lvfs_set_rdonly(lvfs_sbdev(osd_sb(osd_dt_dev(d))),
-                          fsfilt_ldiskfs_journal_sbdev(osd_sb(osd_dt_dev(d))));
-        EXIT;
+        rc = __lvfs_set_rdonly(sb->s_bdev, LDISKFS_SB(sb)->journal_bdev);
+        RETURN(rc);
 }
 
-
 /*
  * Concurrency: serialization provided by callers.
  */
@@ -958,29 +1080,10 @@ static int osd_init_capa_ctxt(const struct lu_env *env, struct dt_device *d,
 }
 
 /**
- * Concurrency: serialization provided by callers.
- */
-static void osd_init_quota_ctxt(const struct lu_env *env, struct dt_device *d,
-                               struct dt_quota_ctxt *ctxt, void *data)
-{
-        struct obd_device *obd = (void *)ctxt;
-        struct vfsmount *mnt = (struct vfsmount *)data;
-        ENTRY;
-
-        obd->u.obt.obt_sb = mnt->mnt_root->d_inode->i_sb;
-        OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
-        obd->obd_lvfs_ctxt.pwdmnt = mnt;
-        obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
-        obd->obd_lvfs_ctxt.fs = get_ds();
-
-        EXIT;
-}
-
-/**
  * Note: we do not count into QUOTA here.
  * If we mount with --data_journal we may need more.
  */
-static const int osd_dto_credits_noquota[DTO_NR] = {
+const int osd_dto_credits_noquota[DTO_NR] = {
         /**
          * Insert/Delete.
          * INDEX_EXTRA_TRANS_BLOCKS(8) +
@@ -991,9 +1094,9 @@ static const int osd_dto_credits_noquota[DTO_NR] = {
         [DTO_INDEX_INSERT]  = 16,
         [DTO_INDEX_DELETE]  = 16,
         /**
-         * Unused now
+        * Used for OI scrub
          */
-        [DTO_IDNEX_UPDATE]  = 16,
+        [DTO_INDEX_UPDATE]  = 16,
         /**
          * Create a object. The same as create object in EXT3.
          * DATA_TRANS_BLOCKS(14) +
@@ -1002,14 +1105,13 @@ static const int osd_dto_credits_noquota[DTO_NR] = {
          */
         [DTO_OBJECT_CREATE] = 25,
         /**
-         * Unused now
+         * XXX: real credits to be fixed
          */
         [DTO_OBJECT_DELETE] = 25,
         /**
-         * Attr set credits.
-         * 3(inode bits, group, GDT)
+         * Attr set credits (inode)
          */
-        [DTO_ATTR_SET_BASE] = 3,
+        [DTO_ATTR_SET_BASE] = 1,
         /**
          * Xattr set. The same as xattr of EXT3.
          * DATA_TRANS_BLOCKS(14)
@@ -1019,7 +1121,7 @@ static const int osd_dto_credits_noquota[DTO_NR] = {
         [DTO_XATTR_SET]     = 14,
         [DTO_LOG_REC]       = 14,
         /**
-         * creadits for inode change during write.
+         * credits for inode change during write.
          */
         [DTO_WRITE_BASE]    = 3,
         /**
@@ -1033,99 +1135,18 @@ static const int osd_dto_credits_noquota[DTO_NR] = {
         [DTO_ATTR_SET_CHOWN]= 0
 };
 
-/**
- * Note: we count into QUOTA here.
- * If we mount with --data_journal we may need more.
- */
-static const int osd_dto_credits_quota[DTO_NR] = {
-        /**
-         * INDEX_EXTRA_TRANS_BLOCKS(8) +
-         * SINGLEDATA_TRANS_BLOCKS(8) +
-         * 2 * QUOTA_TRANS_BLOCKS(2)
-         */
-        [DTO_INDEX_INSERT]  = 20,
-        /**
-         * INDEX_EXTRA_TRANS_BLOCKS(8) +
-         * SINGLEDATA_TRANS_BLOCKS(8) +
-         * 2 * QUOTA_TRANS_BLOCKS(2)
-         */
-        [DTO_INDEX_DELETE]  = 20,
-        /**
-         * Unused now.
-         */
-        [DTO_IDNEX_UPDATE]  = 16,
-        /*
-         * Create a object. Same as create object in EXT3 filesystem.
-         * DATA_TRANS_BLOCKS(16) +
-         * INDEX_EXTRA_BLOCKS(8) +
-         * 3(inode bits, groups, GDT) +
-         * 2 * QUOTA_INIT_BLOCKS(25)
-         */
-        [DTO_OBJECT_CREATE] = 77,
-        /*
-         * Unused now.
-         * DATA_TRANS_BLOCKS(16) +
-         * INDEX_EXTRA_BLOCKS(8) +
-         * 3(inode bits, groups, GDT) +
-         * QUOTA(?)
-         */
-        [DTO_OBJECT_DELETE] = 27,
-        /**
-         * Attr set credits.
-         * 3 (inode bit, group, GDT) +
-         */
-        [DTO_ATTR_SET_BASE] = 3,
-        /**
-         * Xattr set. The same as xattr of EXT3.
-         * DATA_TRANS_BLOCKS(16)
-         * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS are
-         *           also counted in. Do not know why?
-         */
-        [DTO_XATTR_SET]     = 16,
-        [DTO_LOG_REC]       = 16,
-        /**
-         * creadits for inode change during write.
-         */
-        [DTO_WRITE_BASE]    = 3,
-        /**
-         * credits for single block write.
-         */
-        [DTO_WRITE_BLOCK]   = 16,
-        /**
-         * Attr set credits for chown.
-         * It is added to already set setattr credits
-         * 2 * QUOTA_INIT_BLOCKS(25) +
-         * 2 * QUOTA_DEL_BLOCKS(9)
-         */
-        [DTO_ATTR_SET_CHOWN]= 68,
-};
-
-static int osd_credit_get(const struct lu_env *env, struct dt_device *d,
-                          enum dt_txn_op op)
-{
-        LASSERT(ARRAY_SIZE(osd_dto_credits_noquota) ==
-                ARRAY_SIZE(osd_dto_credits_quota));
-        LASSERT(0 <= op && op < ARRAY_SIZE(osd_dto_credits_noquota));
-#ifdef HAVE_QUOTA_SUPPORT
-        if (test_opt(osd_sb(osd_dt_dev(d)), QUOTA))
-                return osd_dto_credits_quota[op];
-        else
-#endif
-                return osd_dto_credits_noquota[op];
-}
-
 static const struct dt_device_operations osd_dt_ops = {
         .dt_root_get       = osd_root_get,
         .dt_statfs         = osd_statfs,
+        .dt_trans_create   = osd_trans_create,
         .dt_trans_start    = osd_trans_start,
         .dt_trans_stop     = osd_trans_stop,
+        .dt_trans_cb_add   = osd_trans_cb_add,
         .dt_conf_get       = osd_conf_get,
         .dt_sync           = osd_sync,
         .dt_ro             = osd_ro,
         .dt_commit_async   = osd_commit_async,
-        .dt_credit_get     = osd_credit_get,
         .dt_init_capa_ctxt = osd_init_capa_ctxt,
-        .dt_init_quota_ctxt= osd_init_quota_ctxt,
 };
 
 static void osd_object_read_lock(const struct lu_env *env,
@@ -1137,7 +1158,7 @@ static void osd_object_read_lock(const struct lu_env *env,
         LINVRNT(osd_invariant(obj));
 
         LASSERT(obj->oo_owner != env);
-        cfs_down_read_nested(&obj->oo_sem, role);
+       down_read_nested(&obj->oo_sem, role);
 
         LASSERT(obj->oo_owner == NULL);
         oti->oti_r_locks++;
@@ -1152,7 +1173,7 @@ static void osd_object_write_lock(const struct lu_env *env,
         LINVRNT(osd_invariant(obj));
 
         LASSERT(obj->oo_owner != env);
-        cfs_down_write_nested(&obj->oo_sem, role);
+       down_write_nested(&obj->oo_sem, role);
 
         LASSERT(obj->oo_owner == NULL);
         obj->oo_owner = env;
@@ -1169,7 +1190,7 @@ static void osd_object_read_unlock(const struct lu_env *env,
 
         LASSERT(oti->oti_r_locks > 0);
         oti->oti_r_locks--;
-        cfs_up_read(&obj->oo_sem);
+       up_read(&obj->oo_sem);
 }
 
 static void osd_object_write_unlock(const struct lu_env *env,
@@ -1184,7 +1205,7 @@ static void osd_object_write_unlock(const struct lu_env *env,
         LASSERT(oti->oti_w_locks > 0);
         oti->oti_w_locks--;
         obj->oo_owner = NULL;
-        cfs_up_write(&obj->oo_sem);
+       up_write(&obj->oo_sem);
 }
 
 static int osd_object_write_locked(const struct lu_env *env,
@@ -1223,14 +1244,14 @@ static int capa_is_sane(const struct lu_env *env,
                 RETURN(-ESTALE);
         }
 
-        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);
+       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;
+               }
+       }
+       spin_unlock(&capa_lock);
 
         if (i == 2) {
                 DEBUG_CAPA(D_ERROR, capa, "no matched capa key");
@@ -1252,8 +1273,8 @@ static int capa_is_sane(const struct lu_env *env,
         RETURN(0);
 }
 
-static int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
-                           struct lustre_capa *capa, __u64 opc)
+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);
@@ -1298,15 +1319,15 @@ static int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
 }
 
 static struct timespec *osd_inode_time(const struct lu_env *env,
-                                       struct inode *inode, __u64 seconds)
+                                      struct inode *inode, __u64 seconds)
 {
-        struct osd_thread_info *oti = osd_oti_get(env);
-        struct timespec        *t   = &oti->oti_time;
+       struct osd_thread_info  *oti = osd_oti_get(env);
+       struct timespec         *t   = &oti->oti_time;
 
-        t->tv_sec  = seconds;
-        t->tv_nsec = 0;
-        *t = timespec_trunc(*t, get_sb_time_gran(inode->i_sb));
-        return t;
+       t->tv_sec = seconds;
+       t->tv_nsec = 0;
+       *t = timespec_trunc(*t, inode->i_sb->s_time_gran);
+       return t;
 }
 
 
@@ -1328,8 +1349,8 @@ static void osd_inode_getattr(const struct lu_env *env,
         attr->la_flags      = LDISKFS_I(inode)->i_flags;
         attr->la_nlink      = inode->i_nlink;
         attr->la_rdev       = inode->i_rdev;
-        attr->la_blksize    = ll_inode_blksize(inode);
-        attr->la_blkbits    = inode->i_blkbits;
+       attr->la_blksize    = 1 << inode->i_blkbits;
+       attr->la_blkbits    = inode->i_blkbits;
 }
 
 static int osd_attr_get(const struct lu_env *env,
@@ -1345,10 +1366,150 @@ static int osd_attr_get(const struct lu_env *env,
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
                 return -EACCES;
 
-        cfs_spin_lock(&obj->oo_guard);
-        osd_inode_getattr(env, obj->oo_inode, attr);
-        cfs_spin_unlock(&obj->oo_guard);
-        return 0;
+       spin_lock(&obj->oo_guard);
+       osd_inode_getattr(env, obj->oo_inode, attr);
+       spin_unlock(&obj->oo_guard);
+       return 0;
+}
+
+static int osd_declare_attr_set(const struct lu_env *env,
+                                struct dt_object *dt,
+                                const struct lu_attr *attr,
+                                struct thandle *handle)
+{
+       struct osd_thandle     *oh;
+       struct osd_object      *obj;
+       struct osd_thread_info *info = osd_oti_get(env);
+       struct lquota_id_info  *qi = &info->oti_qi;
+       long long               bspace;
+       int                     rc = 0;
+       bool                    allocated;
+       ENTRY;
+
+       LASSERT(dt != NULL);
+       LASSERT(handle != NULL);
+
+       obj = osd_dt_obj(dt);
+       LASSERT(osd_invariant(obj));
+
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, attr_set,
+                      osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
+
+       if (attr == NULL || obj->oo_inode == NULL)
+               RETURN(rc);
+
+       bspace   = obj->oo_inode->i_blocks;
+       bspace <<= obj->oo_inode->i_sb->s_blocksize_bits;
+       bspace   = toqb(bspace);
+
+       /* Changing ownership is always preformed by super user, it should not
+        * fail with EDQUOT.
+        *
+        * We still need to call the osd_declare_qid() to calculate the journal
+        * credits for updating quota accounting files and to trigger quota
+        * space adjustment once the operation is completed.*/
+       if ((attr->la_valid & LA_UID) != 0 &&
+            attr->la_uid != obj->oo_inode->i_uid) {
+               qi->lqi_type = USRQUOTA;
+
+               /* inode accounting */
+               qi->lqi_is_blk = false;
+
+               /* one more inode for the new owner ... */
+               qi->lqi_id.qid_uid = attr->la_uid;
+               qi->lqi_space      = 1;
+               allocated = (attr->la_uid == 0) ? true : false;
+               rc = osd_declare_qid(env, oh, qi, allocated, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+
+               /* and one less inode for the current uid */
+               qi->lqi_id.qid_uid = obj->oo_inode->i_uid;
+               qi->lqi_space      = -1;
+               rc = osd_declare_qid(env, oh, qi, true, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+
+               /* block accounting */
+               qi->lqi_is_blk = true;
+
+               /* more blocks for the new owner ... */
+               qi->lqi_id.qid_uid = attr->la_uid;
+               qi->lqi_space      = bspace;
+               allocated = (attr->la_uid == 0) ? true : false;
+               rc = osd_declare_qid(env, oh, qi, allocated, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+
+               /* and finally less blocks for the current owner */
+               qi->lqi_id.qid_uid = obj->oo_inode->i_uid;
+               qi->lqi_space      = -bspace;
+               rc = osd_declare_qid(env, oh, qi, true, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+       }
+
+       if (attr->la_valid & LA_GID &&
+           attr->la_gid != obj->oo_inode->i_gid) {
+               qi->lqi_type = GRPQUOTA;
+
+               /* inode accounting */
+               qi->lqi_is_blk = false;
+
+               /* one more inode for the new group owner ... */
+               qi->lqi_id.qid_gid = attr->la_gid;
+               qi->lqi_space      = 1;
+               allocated = (attr->la_gid == 0) ? true : false;
+               rc = osd_declare_qid(env, oh, qi, allocated, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+
+               /* and one less inode for the current gid */
+               qi->lqi_id.qid_gid = obj->oo_inode->i_gid;
+               qi->lqi_space      = -1;
+               rc = osd_declare_qid(env, oh, qi, true, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+
+               /* block accounting */
+               qi->lqi_is_blk = true;
+
+               /* more blocks for the new owner ... */
+               qi->lqi_id.qid_gid = attr->la_gid;
+               qi->lqi_space      = bspace;
+               allocated = (attr->la_gid == 0) ? true : false;
+               rc = osd_declare_qid(env, oh, qi, allocated, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+
+               /* and finally less blocks for the current owner */
+               qi->lqi_id.qid_gid = obj->oo_inode->i_gid;
+               qi->lqi_space      = -bspace;
+               rc = osd_declare_qid(env, oh, qi, true, NULL);
+               if (rc == -EDQUOT || rc == -EINPROGRESS)
+                       rc = 0;
+               if (rc)
+                       RETURN(rc);
+       }
+
+       RETURN(rc);
 }
 
 static int osd_inode_setattr(const struct lu_env *env,
@@ -1360,28 +1521,6 @@ static int osd_inode_setattr(const struct lu_env *env,
 
         LASSERT(!(bits & LA_TYPE)); /* Huh? You want too much. */
 
-#ifdef HAVE_QUOTA_SUPPORT
-        if ((bits & LA_UID && attr->la_uid != inode->i_uid) ||
-            (bits & LA_GID && attr->la_gid != inode->i_gid)) {
-                struct osd_ctxt *save = &osd_oti_get(env)->oti_ctxt;
-                struct iattr iattr;
-                int rc;
-
-                iattr.ia_valid = 0;
-                if (bits & LA_UID)
-                        iattr.ia_valid |= ATTR_UID;
-                if (bits & LA_GID)
-                        iattr.ia_valid |= ATTR_GID;
-                iattr.ia_uid = attr->la_uid;
-                iattr.ia_gid = attr->la_gid;
-                osd_push_ctxt(env, save);
-                rc = ll_vfs_dq_transfer(inode, &iattr) ? -EDQUOT : 0;
-                osd_pop_ctxt(save);
-                if (rc != 0)
-                        return rc;
-        }
-#endif
-
         if (bits & LA_ATIME)
                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
         if (bits & LA_CTIME)
@@ -1407,7 +1546,7 @@ static int osd_inode_setattr(const struct lu_env *env,
         if (bits & LA_GID)
                 inode->i_gid    = attr->la_gid;
         if (bits & LA_NLINK)
-                inode->i_nlink  = attr->la_nlink;
+               set_nlink(inode, attr->la_nlink);
         if (bits & LA_RDEV)
                 inode->i_rdev   = attr->la_rdev;
 
@@ -1419,6 +1558,32 @@ static int osd_inode_setattr(const struct lu_env *env,
         return 0;
 }
 
+static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr)
+{
+       if ((attr->la_valid & LA_UID && attr->la_uid != inode->i_uid) ||
+           (attr->la_valid & LA_GID && attr->la_gid != inode->i_gid)) {
+               struct iattr    iattr;
+               int             rc;
+
+               iattr.ia_valid = 0;
+               if (attr->la_valid & LA_UID)
+                       iattr.ia_valid |= ATTR_UID;
+               if (attr->la_valid & LA_GID)
+                       iattr.ia_valid |= ATTR_GID;
+               iattr.ia_uid = attr->la_uid;
+               iattr.ia_gid = attr->la_gid;
+
+               rc = ll_vfs_dq_transfer(inode, &iattr);
+               if (rc) {
+                       CERROR("%s: quota transfer failed: rc = %d. Is quota "
+                              "enforcement enabled on the ldiskfs filesystem?",
+                              inode->i_sb->s_id, rc);
+                       return rc;
+               }
+       }
+       return 0;
+}
+
 static int osd_attr_set(const struct lu_env *env,
                         struct dt_object *dt,
                         const struct lu_attr *attr,
@@ -1426,6 +1591,7 @@ static int osd_attr_set(const struct lu_env *env,
                         struct lustre_capa *capa)
 {
         struct osd_object *obj = osd_dt_obj(dt);
+        struct inode      *inode;
         int rc;
 
         LASSERT(handle != NULL);
@@ -1435,54 +1601,31 @@ static int osd_attr_set(const struct lu_env *env,
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
                 return -EACCES;
 
-        cfs_spin_lock(&obj->oo_guard);
-        rc = osd_inode_setattr(env, obj->oo_inode, attr);
-        cfs_spin_unlock(&obj->oo_guard);
+        OSD_EXEC_OP(handle, attr_set);
 
-        if (!rc)
-                obj->oo_inode->i_sb->s_op->dirty_inode(obj->oo_inode);
-        return rc;
-}
+        inode = obj->oo_inode;
+       ll_vfs_dq_init(inode);
 
-/*
- * Object creation.
- *
- * XXX temporary solution.
- */
-static int osd_create_pre(struct osd_thread_info *info, struct osd_object *obj,
-                          struct lu_attr *attr, struct thandle *th)
-{
-        return 0;
-}
+       rc = osd_quota_transfer(inode, attr);
+       if (rc)
+               return rc;
 
-static int osd_create_post(struct osd_thread_info *info, struct osd_object *obj,
-                           struct lu_attr *attr, struct thandle *th)
-{
-        osd_object_init0(obj);
-        return 0;
+       spin_lock(&obj->oo_guard);
+       rc = osd_inode_setattr(env, inode, attr);
+       spin_unlock(&obj->oo_guard);
+
+        if (!rc)
+                inode->i_sb->s_op->dirty_inode(inode);
+        return rc;
 }
 
-static struct dentry * osd_child_dentry_get(const struct lu_env *env,
-                                            struct osd_object *obj,
-                                            const char *name,
-                                            const int namelen)
+struct dentry *osd_child_dentry_get(const struct lu_env *env,
+                                    struct osd_object *obj,
+                                    const char *name, const int namelen)
 {
-        struct osd_thread_info *info   = osd_oti_get(env);
-        struct dentry *child_dentry = &info->oti_child_dentry;
-        struct dentry *obj_dentry = &info->oti_obj_dentry;
-
-        obj_dentry->d_inode = obj->oo_inode;
-        obj_dentry->d_sb = osd_sb(osd_obj2dev(obj));
-        obj_dentry->d_name.hash = 0;
-
-        child_dentry->d_name.hash = 0;
-        child_dentry->d_parent = obj_dentry;
-        child_dentry->d_name.name = name;
-        child_dentry->d_name.len = namelen;
-        return child_dentry;
+        return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
 }
 
-
 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
                       cfs_umode_t mode,
                       struct dt_allocation_hint *hint,
@@ -1491,43 +1634,44 @@ static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
         int result;
         struct osd_device  *osd = osd_obj2dev(obj);
         struct osd_thandle *oth;
-        struct dt_object   *parent;
+        struct dt_object   *parent = NULL;
         struct inode       *inode;
-#ifdef HAVE_QUOTA_SUPPORT
-        struct osd_ctxt    *save = &info->oti_ctxt;
-#endif
 
         LINVRNT(osd_invariant(obj));
         LASSERT(obj->oo_inode == NULL);
+        LASSERT(obj->oo_hl_head == NULL);
+
+        if (S_ISDIR(mode) && ldiskfs_pdo) {
+                obj->oo_hl_head =ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
+                if (obj->oo_hl_head == NULL)
+                        return -ENOMEM;
+        }
 
         oth = container_of(th, struct osd_thandle, ot_super);
         LASSERT(oth->ot_handle->h_transaction != NULL);
 
         if (hint && hint->dah_parent)
                 parent = hint->dah_parent;
-        else
-                parent = osd->od_obj_area;
 
-        LASSERT(parent != NULL);
-        LASSERT(osd_dt_obj(parent)->oo_inode->i_op != NULL);
-
-#ifdef HAVE_QUOTA_SUPPORT
-        osd_push_ctxt(info->oti_env, save);
-#endif
         inode = ldiskfs_create_inode(oth->ot_handle,
-                                     osd_dt_obj(parent)->oo_inode, mode);
-#ifdef HAVE_QUOTA_SUPPORT
-        osd_pop_ctxt(save);
-#endif
+                                     parent ? osd_dt_obj(parent)->oo_inode :
+                                              osd_sb(osd)->s_root->d_inode,
+                                     mode);
         if (!IS_ERR(inode)) {
                 /* Do not update file c/mtime in ldiskfs.
                  * NB: don't need any lock because no contention at this
                  * early stage */
                 inode->i_flags |= S_NOCMTIME;
+               inode->i_state |= I_LUSTRE_NOSCRUB;
                 obj->oo_inode = inode;
                 result = 0;
-        } else
+        } else {
+                if (obj->oo_hl_head != NULL) {
+                        ldiskfs_htree_lock_head_free(obj->oo_hl_head);
+                        obj->oo_hl_head = NULL;
+                }
                 result = PTR_ERR(inode);
+        }
         LINVRNT(osd_invariant(obj));
         return result;
 }
@@ -1544,7 +1688,6 @@ static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
 {
         int result;
         struct osd_thandle *oth;
-        struct osd_device *osd = osd_obj2dev(obj);
         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
 
         LASSERT(S_ISDIR(attr->la_mode));
@@ -1552,16 +1695,7 @@ static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
         oth = container_of(th, struct osd_thandle, ot_super);
         LASSERT(oth->ot_handle->h_transaction != NULL);
         result = osd_mkfile(info, obj, mode, hint, th);
-        if (result == 0 && osd->od_iop_mode == 0) {
-                LASSERT(obj->oo_inode != NULL);
-                /*
-                 * XXX uh-oh... call low-level iam function directly.
-                 */
 
-                result = iam_lvar_create(obj->oo_inode, OSD_NAME_LEN, 4,
-                                         sizeof (struct osd_fid_pack),
-                                         oth->ot_handle);
-        }
         return result;
 }
 
@@ -1575,7 +1709,7 @@ static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
         struct osd_thandle *oth;
         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
 
-        __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX));
+        __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
 
         LASSERT(S_ISREG(attr->la_mode));
 
@@ -1610,7 +1744,7 @@ static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
 {
         LASSERT(S_ISREG(attr->la_mode));
         return osd_mkfile(info, obj, (attr->la_mode &
-                               (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
+                               (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
 }
 
 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
@@ -1621,7 +1755,7 @@ static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
 {
         LASSERT(S_ISLNK(attr->la_mode));
         return osd_mkfile(info, obj, (attr->la_mode &
-                              (S_IFMT | S_IRWXUGO | S_ISVTX)), hint, th);
+                              (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th);
 }
 
 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
@@ -1630,7 +1764,7 @@ static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
                      struct dt_object_format *dof,
                      struct thandle *th)
 {
-        cfs_umode_t mode = attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX);
+        cfs_umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
         int result;
 
         LINVRNT(osd_invariant(obj));
@@ -1641,7 +1775,12 @@ static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
         result = osd_mkfile(info, obj, mode, hint, th);
         if (result == 0) {
                 LASSERT(obj->oo_inode != NULL);
-                init_special_inode(obj->oo_inode, mode, attr->la_rdev);
+               /*
+                * This inode should be marked dirty for i_rdev.  Currently
+                * that is done in the osd_attr_init().
+                */
+               init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
+                                  attr->la_rdev);
         }
         LINVRNT(osd_invariant(obj));
         return result;
@@ -1683,7 +1822,8 @@ static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
 
 
 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,
+                       cfs_umode_t child_mode)
 {
         LASSERT(ah);
 
@@ -1692,6 +1832,44 @@ static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
         ah->dah_mode = child_mode;
 }
 
+static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
+                         struct lu_attr *attr, struct dt_object_format *dof)
+{
+       struct inode   *inode = obj->oo_inode;
+       __u64           valid = attr->la_valid;
+       int             result;
+
+       attr->la_valid &= ~(LA_TYPE | LA_MODE);
+
+        if (dof->dof_type != DFT_NODE)
+                attr->la_valid &= ~LA_RDEV;
+        if ((valid & LA_ATIME) && (attr->la_atime == LTIME_S(inode->i_atime)))
+                attr->la_valid &= ~LA_ATIME;
+        if ((valid & LA_CTIME) && (attr->la_ctime == LTIME_S(inode->i_ctime)))
+                attr->la_valid &= ~LA_CTIME;
+        if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
+                attr->la_valid &= ~LA_MTIME;
+
+       result = osd_quota_transfer(inode, attr);
+       if (result)
+               return;
+
+        if (attr->la_valid != 0) {
+                result = osd_inode_setattr(info->oti_env, inode, attr);
+                /*
+                 * The osd_inode_setattr() should always succeed here.  The
+                 * only error that could be returned is EDQUOT when we are
+                 * trying to change the UID or GID of the inode. However, this
+                 * should not happen since quota enforcement is no longer
+                 * enabled on ldiskfs (lquota takes care of it).
+                 */
+                LASSERTF(result == 0, "%d", result);
+                inode->i_sb->s_op->dirty_inode(inode);
+        }
+
+        attr->la_valid = valid;
+}
+
 /**
  * Helper function for osd_object_create()
  *
@@ -1703,16 +1881,18 @@ static int __osd_object_create(struct osd_thread_info *info,
                                struct dt_object_format *dof,
                                struct thandle *th)
 {
+       int     result;
 
-        int result;
-
-        result = osd_create_pre(info, obj, attr, th);
+       result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
+                                                 th);
         if (result == 0) {
-                result = osd_create_type_f(dof->dof_type)(info, obj,
-                                           attr, hint, dof, th);
-                if (result == 0)
-                        result = osd_create_post(info, obj, attr, th);
+               osd_attr_init(info, obj, attr, dof);
+               osd_object_init0(obj);
+               /* bz 24037 */
+               if (obj->oo_inode && (obj->oo_inode->i_state & I_NEW))
+                       unlock_new_inode(obj->oo_inode);
         }
+
         return result;
 }
 
@@ -1727,16 +1907,55 @@ static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
         struct osd_thread_info *info = osd_oti_get(env);
         struct osd_inode_id    *id   = &info->oti_id;
         struct osd_device      *osd  = osd_obj2dev(obj);
-        struct md_ucred        *uc   = md_ucred(env);
 
         LASSERT(obj->oo_inode != NULL);
-        LASSERT(uc != NULL);
-
-        id->oii_ino = obj->oo_inode->i_ino;
-        id->oii_gen = obj->oo_inode->i_generation;
 
-        return osd_oi_insert(info, &osd->od_oi, fid, id, th,
-                             uc->mu_cap & CFS_CAP_SYS_RESOURCE_MASK);
+       osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
+       return osd_oi_insert(info, osd, fid, id, th);
+}
+
+static int osd_declare_object_create(const struct lu_env *env,
+                                    struct dt_object *dt,
+                                    struct lu_attr *attr,
+                                    struct dt_allocation_hint *hint,
+                                    struct dt_object_format *dof,
+                                    struct thandle *handle)
+{
+       struct osd_thandle      *oh;
+       int                      rc;
+       ENTRY;
+
+       LASSERT(handle != NULL);
+
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, create, osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
+       /* XXX: So far, only normal fid needs be inserted into the oi,
+        *      things could be changed later. Revise following code then. */
+       if (fid_is_norm(lu_object_fid(&dt->do_lu))) {
+               /* Reuse idle OI block may cause additional one OI block
+                * to be changed. */
+               OSD_DECLARE_OP(oh, insert,
+                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
+       }
+       /* If this is directory, then we expect . and .. to be inserted as
+        * well. The one directory block always needs to be created for the
+        * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
+        * block), there is no danger of needing a tree for the first block.
+        */
+       if (attr && S_ISDIR(attr->la_mode)) {
+               OSD_DECLARE_OP(oh, insert,
+                              osd_dto_credits_noquota[DTO_WRITE_BASE]);
+               OSD_DECLARE_OP(oh, insert, 0);
+       }
+
+       if (!attr)
+               RETURN(0);
+
+       rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
+                                  false, false, NULL, false);
+       RETURN(rc);
 }
 
 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
@@ -1757,6 +1976,13 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
+       if (unlikely(fid_is_acct(fid)))
+               /* Quota files can't be created from the kernel any more,
+                * 'tune2fs -O quota' will take care of creating them */
+               RETURN(-EPERM);
+
+        OSD_EXEC_OP(th, create);
+
         result = __osd_object_create(info, obj, attr, hint, dof, th);
         if (result == 0)
                 result = __osd_oi_insert(env, obj, fid, th);
@@ -1767,6 +1993,92 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
 }
 
 /**
+ * Called to destroy on-disk representation of the object
+ *
+ * Concurrency: must be locked
+ */
+static int osd_declare_object_destroy(const struct lu_env *env,
+                                     struct dt_object *dt,
+                                     struct thandle *th)
+{
+       struct osd_object  *obj = osd_dt_obj(dt);
+       struct inode       *inode = obj->oo_inode;
+       struct osd_thandle *oh;
+       int                 rc;
+       ENTRY;
+
+       oh = container_of0(th, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+       LASSERT(inode);
+
+       OSD_DECLARE_OP(oh, delete, osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
+       /* XXX: So far, only normal fid needs to be inserted into the OI,
+        *      so only normal fid needs to be removed from the OI also.
+        * Recycle idle OI leaf may cause additional three OI blocks
+        * to be changed. */
+       OSD_DECLARE_OP(oh, destroy, fid_is_norm(lu_object_fid(&dt->do_lu)) ?
+                       osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3 : 0);
+
+       /* one less inode */
+       rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, -1, oh,
+                                  false, true, NULL, false);
+       if (rc)
+               RETURN(rc);
+       /* data to be truncated */
+       rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
+                                  true, true, NULL, false);
+       RETURN(rc);
+}
+
+static int osd_object_destroy(const struct lu_env *env,
+                              struct dt_object *dt,
+                              struct thandle *th)
+{
+        const struct lu_fid    *fid = lu_object_fid(&dt->do_lu);
+        struct osd_object      *obj = osd_dt_obj(dt);
+        struct inode           *inode = obj->oo_inode;
+        struct osd_device      *osd = osd_obj2dev(obj);
+        struct osd_thandle     *oh;
+        int                     result;
+        ENTRY;
+
+        oh = container_of0(th, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle);
+        LASSERT(inode);
+        LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
+
+       if (unlikely(fid_is_acct(fid)))
+               RETURN(-EPERM);
+
+       /* Parallel control for OI scrub. For most of cases, there is no
+        * lock contention. So it will not affect unlink performance. */
+       mutex_lock(&inode->i_mutex);
+       if (S_ISDIR(inode->i_mode)) {
+               LASSERT(osd_inode_unlinked(inode) ||
+                       inode->i_nlink == 1);
+               spin_lock(&obj->oo_guard);
+               clear_nlink(inode);
+               spin_unlock(&obj->oo_guard);
+               inode->i_sb->s_op->dirty_inode(inode);
+       } else {
+               LASSERT(osd_inode_unlinked(inode));
+       }
+
+        OSD_EXEC_OP(th, destroy);
+
+        result = osd_oi_delete(osd_oti_get(env), osd, fid, th);
+       mutex_unlock(&inode->i_mutex);
+
+        /* XXX: add to ext3 orphan list */
+        /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
+
+        /* not needed in the cache anymore */
+        set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
+
+        RETURN(0);
+}
+
+/**
  * Helper function for osd_xattr_set()
  */
 static int __osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
@@ -1777,11 +2089,10 @@ static int __osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
         struct osd_thread_info *info     = osd_oti_get(env);
         struct dentry          *dentry   = &info->oti_child_dentry;
         int                     fs_flags = 0;
-        int  rc;
+        int                     rc;
 
         LASSERT(dt_object_exists(dt));
         LASSERT(inode->i_op != NULL && inode->i_op->setxattr != NULL);
-        LASSERT(osd_write_locked(env, obj));
 
         if (fl & LU_XATTR_REPLACE)
                 fs_flags |= XATTR_REPLACE;
@@ -1789,6 +2100,7 @@ static int __osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
         if (fl & LU_XATTR_CREATE)
                 fs_flags |= XATTR_CREATE;
 
+       ll_vfs_dq_init(inode);
         dentry->d_inode = inode;
         rc = inode->i_op->setxattr(dentry, name, buf->lb_buf,
                                    buf->lb_len, fs_flags);
@@ -1820,26 +2132,6 @@ static int osd_ea_fid_set(const struct lu_env *env, struct dt_object *dt,
 }
 
 /**
- * Helper function to form igif
- */
-static inline void osd_igif_get(const struct lu_env *env, struct inode  *inode,
-                                struct lu_fid *fid)
-{
-        LU_IGIF_BUILD(fid, inode->i_ino, inode->i_generation);
-}
-
-/**
- * Helper function to pack the fid, ldiskfs stores fid in packed format.
- */
-void osd_fid_pack(struct osd_fid_pack *pack, const struct dt_rec *fid,
-                  struct lu_fid *befider)
-{
-        fid_cpu_to_be(befider, (struct lu_fid *)fid);
-        memcpy(pack->fp_area, befider, sizeof(*befider));
-        pack->fp_len =  sizeof(*befider) + 1;
-}
-
-/**
  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
  * To have compatilibility with 1.8 ldiskfs driver we need to have
@@ -1857,23 +2149,6 @@ void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
                       (struct lu_fid *)fid);
 }
 
-int osd_fid_unpack(struct lu_fid *fid, const struct osd_fid_pack *pack)
-{
-        int result;
-
-        result = 0;
-        switch (pack->fp_len) {
-        case sizeof *fid + 1:
-                memcpy(fid, pack->fp_area, sizeof *fid);
-                fid_be_to_cpu(fid, fid);
-                break;
-        default:
-                CERROR("Unexpected packed fid size: %d\n", pack->fp_len);
-                result = -EIO;
-        }
-        return result;
-}
-
 /**
  * Try to read the fid from inode ea into dt_rec, if return value
  * i.e. rc is +ve, then we got fid, otherwise we will have to form igif
@@ -1883,54 +2158,20 @@ int osd_fid_unpack(struct lu_fid *fid, const struct osd_fid_pack *pack)
  * \retval 0 on success
  */
 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
-                          __u32 ino, struct lu_fid *fid)
+                         __u32 ino, struct lu_fid *fid,
+                         struct osd_inode_id *id)
 {
-        struct osd_thread_info  *info      = osd_oti_get(env);
-        struct lustre_mdt_attrs *mdt_attrs = &info->oti_mdt_attrs;
-        struct lu_device        *ldev   = obj->oo_dt.do_lu.lo_dev;
-        struct dentry           *dentry = &info->oti_child_dentry;
-        struct osd_inode_id     *id     = &info->oti_id;
-        struct osd_device       *dev;
-        struct inode            *inode;
-        int                      rc;
-
-        ENTRY;
-        dev  = osd_dev(ldev);
-
-        id->oii_ino = ino;
-        id->oii_gen = OSD_OII_NOGEN;
-
-        inode = osd_iget(info, dev, id);
-        if (IS_ERR(inode)) {
-                rc = PTR_ERR(inode);
-                GOTO(out,rc);
-        }
-        dentry->d_inode = inode;
+       struct osd_thread_info *info  = osd_oti_get(env);
+       struct inode           *inode;
+       ENTRY;
 
-        LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
-        rc = inode->i_op->getxattr(dentry, XATTR_NAME_LMA, (void *)mdt_attrs,
-                                   sizeof *mdt_attrs);
-
-        /* Check LMA compatibility */
-        if (rc > 0 &&
-            (mdt_attrs->lma_incompat & ~cpu_to_le32(LMA_INCOMPAT_SUPP))) {
-                CWARN("Inode %lx: Unsupported incompat LMA feature(s) %#x\n",
-                      inode->i_ino, le32_to_cpu(mdt_attrs->lma_incompat) &
-                      ~LMA_INCOMPAT_SUPP);
-                return -ENOSYS;
-        }
+       osd_id_gen(id, ino, OSD_OII_NOGEN);
+       inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
+       if (IS_ERR(inode))
+               RETURN(PTR_ERR(inode));
 
-        if (rc > 0) {
-                lustre_lma_swab(mdt_attrs);
-                memcpy(fid, &mdt_attrs->lma_self_fid, sizeof(*fid));
-                rc = 0;
-        } else if (rc == -ENODATA) {
-                osd_igif_get(env, inode, fid);
-                rc = 0;
-        }
-        iput(inode);
-out:
-        RETURN(rc);
+       iput(inode);
+       RETURN(0);
 }
 
 /**
@@ -1942,15 +2183,15 @@ out:
  * \retval -ve, on error
  */
 static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
-                             struct lu_attr *attr,
-                             struct dt_allocation_hint *hint,
-                             struct dt_object_format *dof,
-                             struct thandle *th)
+                                struct lu_attr *attr,
+                                struct dt_allocation_hint *hint,
+                                struct dt_object_format *dof,
+                                struct thandle *th)
 {
         const struct lu_fid    *fid    = lu_object_fid(&dt->do_lu);
         struct osd_object      *obj    = osd_dt_obj(dt);
         struct osd_thread_info *info   = osd_oti_get(env);
-        int result;
+        int                     result;
 
         ENTRY;
 
@@ -1959,8 +2200,14 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
-        result = __osd_object_create(info, obj, attr, hint, dof, th);
+       if (unlikely(fid_is_acct(fid)))
+               /* Quota files can't be created from the kernel any more,
+                * 'tune2fs -O quota' will take care of creating them */
+               RETURN(-EPERM);
+
+        OSD_EXEC_OP(th, create);
 
+        result = __osd_object_create(info, obj, attr, hint, dof, th);
         /* objects under osd root shld have igif fid, so dont add fid EA */
         if (result == 0 && fid_seq(fid) >= FID_SEQ_NORMAL)
                 result = osd_ea_fid_set(env, dt, fid);
@@ -1973,59 +2220,135 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
         RETURN(result);
 }
 
+static int osd_declare_object_ref_add(const struct lu_env *env,
+                                      struct dt_object *dt,
+                                      struct thandle *handle)
+{
+        struct osd_thandle *oh;
+
+        /* it's possible that object doesn't exist yet */
+        LASSERT(handle != NULL);
+
+        oh = container_of0(handle, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, ref_add, osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
+
+       return 0;
+}
+
 /*
  * Concurrency: @dt is write locked.
  */
-static void osd_object_ref_add(const struct lu_env *env,
-                               struct dt_object *dt,
-                               struct thandle *th)
+static int osd_object_ref_add(const struct lu_env *env,
+                              struct dt_object *dt, struct thandle *th)
 {
         struct osd_object *obj = osd_dt_obj(dt);
-        struct inode *inode = obj->oo_inode;
+        struct inode      *inode = obj->oo_inode;
 
         LINVRNT(osd_invariant(obj));
         LASSERT(dt_object_exists(dt));
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
-        cfs_spin_lock(&obj->oo_guard);
-        LASSERT(inode->i_nlink < LDISKFS_LINK_MAX);
-        inode->i_nlink++;
-        cfs_spin_unlock(&obj->oo_guard);
-        inode->i_sb->s_op->dirty_inode(inode);
-        LINVRNT(osd_invariant(obj));
+        OSD_EXEC_OP(th, ref_add);
+
+       /*
+        * DIR_NLINK feature is set for compatibility reasons if:
+        * 1) nlinks > LDISKFS_LINK_MAX, or
+        * 2) nlinks == 2, since this indicates i_nlink was previously 1.
+        *
+        * It is easier to always set this flag (rather than check and set),
+        * since it has less overhead, and the superblock will be dirtied
+        * at some point. Both e2fsprogs and any Lustre-supported ldiskfs
+        * do not actually care whether this flag is set or not.
+        */
+       spin_lock(&obj->oo_guard);
+       /* inc_nlink from 0 may cause WARN_ON */
+       if(inode->i_nlink == 0)
+               set_nlink(inode, 1);
+       else
+               inc_nlink(inode);
+       if (S_ISDIR(inode->i_mode) && inode->i_nlink > 1) {
+               if (inode->i_nlink >= LDISKFS_LINK_MAX ||
+                   inode->i_nlink == 2)
+                       set_nlink(inode, 1);
+       }
+       LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
+       spin_unlock(&obj->oo_guard);
+       inode->i_sb->s_op->dirty_inode(inode);
+       LINVRNT(osd_invariant(obj));
+
+       return 0;
+}
+
+static int osd_declare_object_ref_del(const struct lu_env *env,
+                                      struct dt_object *dt,
+                                      struct thandle *handle)
+{
+        struct osd_thandle *oh;
+
+        LASSERT(dt_object_exists(dt));
+        LASSERT(handle != NULL);
+
+        oh = container_of0(handle, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, ref_del, osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
+
+       return 0;
 }
 
 /*
  * Concurrency: @dt is write locked.
  */
-static void osd_object_ref_del(const struct lu_env *env,
-                               struct dt_object *dt,
-                               struct thandle *th)
+static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
+                              struct thandle *th)
 {
         struct osd_object *obj = osd_dt_obj(dt);
-        struct inode *inode = obj->oo_inode;
+        struct inode      *inode = obj->oo_inode;
 
         LINVRNT(osd_invariant(obj));
         LASSERT(dt_object_exists(dt));
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
-        cfs_spin_lock(&obj->oo_guard);
-        LASSERT(inode->i_nlink > 0);
-        inode->i_nlink--;
-        cfs_spin_unlock(&obj->oo_guard);
-        inode->i_sb->s_op->dirty_inode(inode);
-        LINVRNT(osd_invariant(obj));
+        OSD_EXEC_OP(th, ref_del);
+
+       spin_lock(&obj->oo_guard);
+       LASSERT(inode->i_nlink > 0);
+       drop_nlink(inode);
+       /* If this is/was a many-subdir directory (nlink > LDISKFS_LINK_MAX)
+        * then the nlink count is 1. Don't let it be set to 0 or the directory
+        * inode will be deleted incorrectly. */
+       if (S_ISDIR(inode->i_mode) && inode->i_nlink == 0)
+               set_nlink(inode, 1);
+       spin_unlock(&obj->oo_guard);
+       inode->i_sb->s_op->dirty_inode(inode);
+       LINVRNT(osd_invariant(obj));
+
+       return 0;
+}
+
+/*
+ * Get the 64-bit version for an inode.
+ */
+static int osd_object_version_get(const struct lu_env *env,
+                                  struct dt_object *dt, dt_obj_version_t *ver)
+{
+        struct inode *inode = osd_dt_obj(dt)->oo_inode;
+
+        CDEBUG(D_INODE, "Get version "LPX64" for inode %lu\n",
+               LDISKFS_I(inode)->i_fs_version, inode->i_ino);
+        *ver = LDISKFS_I(inode)->i_fs_version;
+        return 0;
 }
 
 /*
  * Concurrency: @dt is read locked.
  */
-static int osd_xattr_get(const struct lu_env *env,
-                         struct dt_object *dt,
-                         struct lu_buf *buf,
-                         const char *name,
+static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
+                         struct lu_buf *buf, const char *name,
                          struct lustre_capa *capa)
 {
         struct osd_object      *obj    = osd_dt_obj(dt);
@@ -2033,9 +2356,17 @@ static int osd_xattr_get(const struct lu_env *env,
         struct osd_thread_info *info   = osd_oti_get(env);
         struct dentry          *dentry = &info->oti_obj_dentry;
 
+        /* version get is not real XATTR but uses xattr API */
+        if (strcmp(name, XATTR_NAME_VERSION) == 0) {
+                /* for version we are just using xattr API but change inode
+                 * field instead */
+                LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
+                osd_object_version_get(env, dt, buf->lb_buf);
+                return sizeof(dt_obj_version_t);
+        }
+
         LASSERT(dt_object_exists(dt));
         LASSERT(inode->i_op != NULL && inode->i_op->getxattr != NULL);
-        LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_READ))
                 return -EACCES;
@@ -2044,6 +2375,44 @@ static int osd_xattr_get(const struct lu_env *env,
         return inode->i_op->getxattr(dentry, name, buf->lb_buf, buf->lb_len);
 }
 
+
+static int osd_declare_xattr_set(const struct lu_env *env,
+                                 struct dt_object *dt,
+                                 const struct lu_buf *buf, const char *name,
+                                 int fl, struct thandle *handle)
+{
+       struct osd_thandle *oh;
+
+       LASSERT(handle != NULL);
+
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, xattr_set, strcmp(name, XATTR_NAME_VERSION) == 0 ?
+                      osd_dto_credits_noquota[DTO_ATTR_SET_BASE] :
+                      osd_dto_credits_noquota[DTO_XATTR_SET]);
+
+       return 0;
+}
+
+/*
+ * Set the 64-bit version for object
+ */
+static void osd_object_version_set(const struct lu_env *env,
+                                   struct dt_object *dt,
+                                   dt_obj_version_t *new_version)
+{
+        struct inode *inode = osd_dt_obj(dt)->oo_inode;
+
+        CDEBUG(D_INODE, "Set version "LPX64" (old "LPX64") for inode %lu\n",
+               *new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
+
+        LDISKFS_I(inode)->i_fs_version = *new_version;
+        /** Version is set after all inode operations are finished,
+         *  so we should mark it dirty here */
+        inode->i_sb->s_op->dirty_inode(inode);
+}
+
 /*
  * Concurrency: @dt is write locked.
  */
@@ -2053,19 +2422,27 @@ static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
 {
         LASSERT(handle != NULL);
 
+        /* version set is not real XATTR */
+        if (strcmp(name, XATTR_NAME_VERSION) == 0) {
+                /* for version we are just using xattr API but change inode
+                 * field instead */
+                LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
+                osd_object_version_set(env, dt, buf->lb_buf);
+                return sizeof(dt_obj_version_t);
+        }
+
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
                 return -EACCES;
 
+        OSD_EXEC_OP(handle, xattr_set);
         return __osd_xattr_set(env, dt, buf, name, fl);
 }
 
 /*
  * Concurrency: @dt is read locked.
  */
-static int osd_xattr_list(const struct lu_env *env,
-                          struct dt_object *dt,
-                          struct lu_buf *buf,
-                          struct lustre_capa *capa)
+static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
+                          struct lu_buf *buf, struct lustre_capa *capa)
 {
         struct osd_object      *obj    = osd_dt_obj(dt);
         struct inode           *inode  = obj->oo_inode;
@@ -2083,13 +2460,28 @@ static int osd_xattr_list(const struct lu_env *env,
         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
 }
 
+static int osd_declare_xattr_del(const struct lu_env *env,
+                                 struct dt_object *dt, const char *name,
+                                 struct thandle *handle)
+{
+        struct osd_thandle *oh;
+
+        LASSERT(dt_object_exists(dt));
+        LASSERT(handle != NULL);
+
+        oh = container_of0(handle, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, xattr_set, osd_dto_credits_noquota[DTO_XATTR_SET]);
+
+       return 0;
+}
+
 /*
  * Concurrency: @dt is write locked.
  */
-static int osd_xattr_del(const struct lu_env *env,
-                         struct dt_object *dt,
-                         const char *name,
-                         struct thandle *handle,
+static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
+                         const char *name, struct thandle *handle,
                          struct lustre_capa *capa)
 {
         struct osd_object      *obj    = osd_dt_obj(dt);
@@ -2106,6 +2498,9 @@ static int osd_xattr_del(const struct lu_env *env,
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
                 return -EACCES;
 
+        OSD_EXEC_OP(handle, xattr_set);
+
+       ll_vfs_dq_init(inode);
         dentry->d_inode = inode;
         rc = inode->i_op->removexattr(dentry, name);
         return rc;
@@ -2181,9 +2576,9 @@ static struct obd_capa *osd_capa_get(const struct lu_env *env,
                 RETURN(oc);
         }
 
-        cfs_spin_lock(&capa_lock);
-        *key = dev->od_capa_keys[1];
-        cfs_spin_unlock(&capa_lock);
+       spin_lock(&capa_lock);
+       *key = dev->od_capa_keys[1];
+       spin_unlock(&capa_lock);
 
         capa->lc_keyid = key->lk_keyid;
         capa->lc_expiry = cfs_time_current_sec() + dev->od_capa_timeout;
@@ -2200,51 +2595,23 @@ static struct obd_capa *osd_capa_get(const struct lu_env *env,
 
 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
 {
-        int rc;
-        struct osd_object      *obj    = osd_dt_obj(dt);
-        struct inode           *inode  = obj->oo_inode;
-        struct osd_thread_info *info   = osd_oti_get(env);
-        struct dentry          *dentry = &info->oti_obj_dentry;
-        struct file            *file   = &info->oti_file;
-        ENTRY;
+       struct osd_object       *obj    = osd_dt_obj(dt);
+       struct inode            *inode  = obj->oo_inode;
+       struct osd_thread_info  *info   = osd_oti_get(env);
+       struct dentry           *dentry = &info->oti_obj_dentry;
+       struct file             *file   = &info->oti_file;
+       int                     rc;
 
-        dentry->d_inode = inode;
-        file->f_dentry = dentry;
-        file->f_mapping = inode->i_mapping;
-        file->f_op = inode->i_fop;
-        LOCK_INODE_MUTEX(inode);
-        rc = file->f_op->fsync(file, dentry, 0);
-        UNLOCK_INODE_MUTEX(inode);
-        RETURN(rc);
-}
-
-/*
- * Get the 64-bit version for an inode.
- */
-static dt_obj_version_t osd_object_version_get(const struct lu_env *env,
-                                               struct dt_object *dt)
-{
-        struct inode *inode = osd_dt_obj(dt)->oo_inode;
+       ENTRY;
 
-        CDEBUG(D_INFO, "Get version "LPX64" for inode %lu\n",
-               LDISKFS_I(inode)->i_fs_version, inode->i_ino);
-        return LDISKFS_I(inode)->i_fs_version;
-}
-
-/*
- * Set the 64-bit version and return the old version.
- */
-static void osd_object_version_set(const struct lu_env *env, struct dt_object *dt,
-                                   dt_obj_version_t new_version)
-{
-        struct inode *inode = osd_dt_obj(dt)->oo_inode;
-
-        CDEBUG(D_INFO, "Set version "LPX64" (old "LPX64") for inode %lu\n",
-               new_version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
-        LDISKFS_I(inode)->i_fs_version = new_version;
-        /** Version is set after all inode operations are finished,
-         *  so we should mark it dirty here */
-        inode->i_sb->s_op->dirty_inode(inode);
+       dentry->d_inode = inode;
+       file->f_dentry = dentry;
+       file->f_mapping = inode->i_mapping;
+       file->f_op = inode->i_fop;
+       mutex_lock(&inode->i_mutex);
+       rc = file->f_op->fsync(file, dentry, 0);
+       mutex_unlock(&inode->i_mutex);
+       RETURN(rc);
 }
 
 static int osd_data_get(const struct lu_env *env, struct dt_object *dt,
@@ -2295,18 +2662,19 @@ static int osd_iam_container_init(const struct lu_env *env,
                                   struct osd_object *obj,
                                   struct osd_directory *dir)
 {
+        struct iam_container *bag = &dir->od_container;
         int result;
-        struct iam_container *bag;
 
-        bag    = &dir->od_container;
         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
-        if (result == 0) {
-                result = iam_container_setup(bag);
-                if (result == 0)
-                        obj->oo_dt.do_index_ops = &osd_index_iam_ops;
-                else
-                        iam_container_fini(bag);
-        }
+        if (result != 0)
+                return result;
+
+        result = iam_container_setup(bag);
+        if (result == 0)
+                obj->oo_dt.do_index_ops = &osd_index_iam_ops;
+        else
+                iam_container_fini(bag);
+
         return result;
 }
 
@@ -2317,10 +2685,9 @@ static int osd_iam_container_init(const struct lu_env *env,
 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
                          const struct dt_index_features *feat)
 {
-        int result;
-        int ea_dir = 0;
-        struct osd_object *obj = osd_dt_obj(dt);
-        struct osd_device *osd = osd_obj2dev(obj);
+       int                      result;
+       int                      skip_iam = 0;
+       struct osd_object       *obj = osd_dt_obj(dt);
 
         LINVRNT(osd_invariant(obj));
         LASSERT(dt_object_exists(dt));
@@ -2328,332 +2695,159 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
         if (osd_object_is_root(obj)) {
                 dt->do_index_ops = &osd_index_ea_ops;
                 result = 0;
-        } else if (feat == &dt_directory_features && osd->od_iop_mode) {
+       } else if (feat == &dt_directory_features) {
                 dt->do_index_ops = &osd_index_ea_ops;
                 if (S_ISDIR(obj->oo_inode->i_mode))
                         result = 0;
                 else
                         result = -ENOTDIR;
-                ea_dir = 1;
+               skip_iam = 1;
+       } else if (unlikely(feat == &dt_otable_features)) {
+               dt->do_index_ops = &osd_otable_ops;
+               return 0;
+       } else if (feat == &dt_acct_features) {
+               dt->do_index_ops = &osd_acct_index_ops;
+               result = 0;
+               skip_iam = 1;
         } else if (!osd_has_index(obj)) {
                 struct osd_directory *dir;
 
                 OBD_ALLOC_PTR(dir);
                 if (dir != NULL) {
 
-                        cfs_spin_lock(&obj->oo_guard);
-                        if (obj->oo_dir == NULL)
-                                obj->oo_dir = dir;
-                        else
-                                /*
-                                 * Concurrent thread allocated container data.
-                                 */
-                                OBD_FREE_PTR(dir);
-                        cfs_spin_unlock(&obj->oo_guard);
-                        /*
-                         * Now, that we have container data, serialize its
-                         * initialization.
-                         */
-                        cfs_down_write(&obj->oo_ext_idx_sem);
-                        /*
-                         * recheck under lock.
-                         */
-                        if (!osd_has_index(obj))
-                                result = osd_iam_container_init(env, obj, dir);
-                        else
-                                result = 0;
-                        cfs_up_write(&obj->oo_ext_idx_sem);
-                } else
+                       spin_lock(&obj->oo_guard);
+                       if (obj->oo_dir == NULL)
+                               obj->oo_dir = dir;
+                       else
+                               /*
+                                * Concurrent thread allocated container data.
+                                */
+                               OBD_FREE_PTR(dir);
+                       spin_unlock(&obj->oo_guard);
+                       /*
+                        * Now, that we have container data, serialize its
+                        * initialization.
+                        */
+                       down_write(&obj->oo_ext_idx_sem);
+                       /*
+                        * recheck under lock.
+                        */
+                       if (!osd_has_index(obj))
+                               result = osd_iam_container_init(env, obj, dir);
+                       else
+                               result = 0;
+                       up_write(&obj->oo_ext_idx_sem);
+                } else {
                         result = -ENOMEM;
-        } else
+                }
+        } else {
                 result = 0;
+        }
 
-        if (result == 0 && ea_dir == 0) {
+       if (result == 0 && skip_iam == 0) {
                 if (!osd_iam_index_probe(env, obj, feat))
                         result = -ENOTDIR;
         }
         LINVRNT(osd_invariant(obj));
 
-        return result;
-}
-
-static const struct dt_object_operations osd_obj_ops = {
-        .do_read_lock    = osd_object_read_lock,
-        .do_write_lock   = osd_object_write_lock,
-        .do_read_unlock  = osd_object_read_unlock,
-        .do_write_unlock = osd_object_write_unlock,
-        .do_write_locked = osd_object_write_locked,
-        .do_attr_get     = osd_attr_get,
-        .do_attr_set     = osd_attr_set,
-        .do_ah_init      = osd_ah_init,
-        .do_create       = osd_object_create,
-        .do_index_try    = osd_index_try,
-        .do_ref_add      = osd_object_ref_add,
-        .do_ref_del      = osd_object_ref_del,
-        .do_xattr_get    = osd_xattr_get,
-        .do_xattr_set    = osd_xattr_set,
-        .do_xattr_del    = osd_xattr_del,
-        .do_xattr_list   = osd_xattr_list,
-        .do_capa_get     = osd_capa_get,
-        .do_object_sync  = osd_object_sync,
-        .do_version_get  = osd_object_version_get,
-        .do_version_set  = osd_object_version_set,
-        .do_data_get     = osd_data_get,
-};
-
-/**
- * dt_object_operations for interoperability mode
- * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
- */
-static const struct dt_object_operations osd_obj_ea_ops = {
-        .do_read_lock    = osd_object_read_lock,
-        .do_write_lock   = osd_object_write_lock,
-        .do_read_unlock  = osd_object_read_unlock,
-        .do_write_unlock = osd_object_write_unlock,
-        .do_write_locked = osd_object_write_locked,
-        .do_attr_get     = osd_attr_get,
-        .do_attr_set     = osd_attr_set,
-        .do_ah_init      = osd_ah_init,
-        .do_create       = osd_object_ea_create,
-        .do_index_try    = osd_index_try,
-        .do_ref_add      = osd_object_ref_add,
-        .do_ref_del      = osd_object_ref_del,
-        .do_xattr_get    = osd_xattr_get,
-        .do_xattr_set    = osd_xattr_set,
-        .do_xattr_del    = osd_xattr_del,
-        .do_xattr_list   = osd_xattr_list,
-        .do_capa_get     = osd_capa_get,
-        .do_object_sync  = osd_object_sync,
-        .do_version_get  = osd_object_version_get,
-        .do_version_set  = osd_object_version_set,
-        .do_data_get     = osd_data_get,
-};
-
-/*
- * Body operations.
- */
-
-/*
- * XXX: Another layering violation for now.
- *
- * We don't want to use ->f_op->read methods, because generic file write
- *
- *         - serializes on ->i_sem, and
- *
- *         - does a lot of extra work like balance_dirty_pages(),
- *
- * which doesn't work for globally shared files like /last-received.
- */
-static int osd_ldiskfs_readlink(struct inode *inode, char *buffer, int buflen)
-{
-        struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
-
-        memcpy(buffer, (char*)ei->i_data, buflen);
-
-        return  buflen;
-}
-
-static int osd_ldiskfs_read(struct inode *inode, void *buf, int size,
-                            loff_t *offs)
-{
-        struct buffer_head *bh;
-        unsigned long block;
-        int osize = size;
-        int blocksize;
-        int csize;
-        int boffs;
-        int err;
-
-        /* prevent reading after eof */
-        spin_lock(&inode->i_lock);
-        if (i_size_read(inode) < *offs + size) {
-                size = i_size_read(inode) - *offs;
-                spin_unlock(&inode->i_lock);
-                if (size < 0) {
-                        CDEBUG(D_EXT2, "size %llu is too short to read @%llu\n",
-                               i_size_read(inode), *offs);
-                        return -EBADR;
-                } else if (size == 0) {
-                        return 0;
-                }
-        } else {
-                spin_unlock(&inode->i_lock);
-        }
-
-        blocksize = 1 << inode->i_blkbits;
-
-        while (size > 0) {
-                block = *offs >> inode->i_blkbits;
-                boffs = *offs & (blocksize - 1);
-                csize = min(blocksize - boffs, size);
-                bh = ldiskfs_bread(NULL, inode, block, 0, &err);
-                if (!bh) {
-                        CERROR("can't read block: %d\n", err);
-                        return err;
-                }
-
-                memcpy(buf, bh->b_data + boffs, csize);
-                brelse(bh);
-
-                *offs += csize;
-                buf += csize;
-                size -= csize;
-        }
-        return osize;
-}
-
-static ssize_t osd_read(const struct lu_env *env, struct dt_object *dt,
-                        struct lu_buf *buf, loff_t *pos,
-                        struct lustre_capa *capa)
-{
-        struct osd_object      *obj    = osd_dt_obj(dt);
-        struct inode           *inode  = obj->oo_inode;
-        int rc;
-
-        if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_READ))
-                RETURN(-EACCES);
-
-        /* Read small symlink from inode body as we need to maintain correct
-         * on-disk symlinks for ldiskfs.
-         */
-        if (S_ISLNK(obj->oo_dt.do_lu.lo_header->loh_attr) &&
-            (buf->lb_len <= sizeof (LDISKFS_I(inode)->i_data)))
-                rc = osd_ldiskfs_readlink(inode, buf->lb_buf, buf->lb_len);
-        else
-                rc = osd_ldiskfs_read(inode, buf->lb_buf, buf->lb_len, pos);
-
-        return rc;
-}
-
-static int osd_ldiskfs_writelink(struct inode *inode, char *buffer, int buflen)
-{
-
-        memcpy((char*)&LDISKFS_I(inode)->i_data, (char *)buffer,
-               buflen);
-        LDISKFS_I(inode)->i_disksize = buflen;
-        i_size_write(inode, buflen);
-        inode->i_sb->s_op->dirty_inode(inode);
-
-        return 0;
-}
-
-static int osd_ldiskfs_write_record(struct inode *inode, void *buf, int bufsize,
-                                    loff_t *offs, handle_t *handle)
-{
-        struct buffer_head *bh = NULL;
-        loff_t offset = *offs;
-        loff_t new_size = i_size_read(inode);
-        unsigned long block;
-        int blocksize = 1 << inode->i_blkbits;
-        int err = 0;
-        int size;
-        int boffs;
-        int dirty_inode = 0;
-
-        while (bufsize > 0) {
-                if (bh != NULL)
-                        brelse(bh);
-
-                block = offset >> inode->i_blkbits;
-                boffs = offset & (blocksize - 1);
-                size = min(blocksize - boffs, bufsize);
-                bh = ldiskfs_bread(handle, inode, block, 1, &err);
-                if (!bh) {
-                        CERROR("can't read/create block: %d\n", err);
-                        break;
-                }
-
-                err = ldiskfs_journal_get_write_access(handle, bh);
-                if (err) {
-                        CERROR("journal_get_write_access() returned error %d\n",
-                               err);
-                        break;
-                }
-                LASSERTF(boffs + size <= bh->b_size,
-                         "boffs %d size %d bh->b_size %lu",
-                         boffs, size, (unsigned long)bh->b_size);
-                memcpy(bh->b_data + boffs, buf, size);
-                err = ldiskfs_journal_dirty_metadata(handle, bh);
-                if (err)
-                        break;
-
-                if (offset + size > new_size)
-                        new_size = offset + size;
-                offset += size;
-                bufsize -= size;
-                buf += size;
-        }
-        if (bh)
-                brelse(bh);
-
-        /* correct in-core and on-disk sizes */
-        if (new_size > i_size_read(inode)) {
-                spin_lock(&inode->i_lock);
-                if (new_size > i_size_read(inode))
-                        i_size_write(inode, new_size);
-                if (i_size_read(inode) > LDISKFS_I(inode)->i_disksize) {
-                        LDISKFS_I(inode)->i_disksize = i_size_read(inode);
-                        dirty_inode = 1;
-                }
-                spin_unlock(&inode->i_lock);
-                if (dirty_inode)
-                        inode->i_sb->s_op->dirty_inode(inode);
-        }
+       if (is_quota_glb_feat(feat))
+               result = osd_quota_migration(env, dt, feat);
 
-        if (err == 0)
-                *offs = offset;
-        return err;
+        return result;
 }
 
-static ssize_t osd_write(const struct lu_env *env, struct dt_object *dt,
-                         const struct lu_buf *buf, loff_t *pos,
-                         struct thandle *handle, struct lustre_capa *capa,
-                         int ignore_quota)
+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 osd_object  *obj   = osd_dt_obj(dt);
-        struct inode       *inode = obj->oo_inode;
-        struct osd_thandle *oh;
-        ssize_t            result = 0;
-#ifdef HAVE_QUOTA_SUPPORT
-        cfs_cap_t           save = cfs_curproc_cap_pack();
-#endif
-
-        LASSERT(handle != NULL);
+       attr->la_valid = 0;
+       return 0;
+}
 
-        if (osd_object_auth(env, dt, capa, CAPA_OPC_BODY_WRITE))
-                RETURN(-EACCES);
+static const struct dt_object_operations osd_obj_ops = {
+        .do_read_lock         = osd_object_read_lock,
+        .do_write_lock        = osd_object_write_lock,
+        .do_read_unlock       = osd_object_read_unlock,
+        .do_write_unlock      = osd_object_write_unlock,
+        .do_write_locked      = osd_object_write_locked,
+        .do_attr_get          = osd_attr_get,
+        .do_declare_attr_set  = osd_declare_attr_set,
+        .do_attr_set          = osd_attr_set,
+        .do_ah_init           = osd_ah_init,
+        .do_declare_create    = osd_declare_object_create,
+        .do_create            = osd_object_create,
+        .do_declare_destroy   = osd_declare_object_destroy,
+        .do_destroy           = osd_object_destroy,
+        .do_index_try         = osd_index_try,
+        .do_declare_ref_add   = osd_declare_object_ref_add,
+        .do_ref_add           = osd_object_ref_add,
+        .do_declare_ref_del   = osd_declare_object_ref_del,
+        .do_ref_del           = osd_object_ref_del,
+        .do_xattr_get         = osd_xattr_get,
+        .do_declare_xattr_set = osd_declare_xattr_set,
+        .do_xattr_set         = osd_xattr_set,
+        .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,
+        .do_data_get          = osd_data_get,
+};
 
-        oh = container_of(handle, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle->h_transaction != NULL);
-#ifdef HAVE_QUOTA_SUPPORT
-        if (ignore_quota)
-                cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
-        else
-                cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
-#endif
-        /* Write small symlink to inode body as we need to maintain correct
-         * on-disk symlinks for ldiskfs.
-         */
-        if(S_ISLNK(obj->oo_dt.do_lu.lo_header->loh_attr) &&
-           (buf->lb_len < sizeof (LDISKFS_I(inode)->i_data)))
-                result = osd_ldiskfs_writelink(inode, buf->lb_buf, buf->lb_len);
-        else
-                result = osd_ldiskfs_write_record(inode, buf->lb_buf,
-                                                  buf->lb_len, pos,
-                                                  oh->ot_handle);
-#ifdef HAVE_QUOTA_SUPPORT
-        cfs_curproc_cap_unpack(save);
-#endif
-        if (result == 0)
-                result = buf->lb_len;
-        return result;
-}
+/**
+ * dt_object_operations for interoperability mode
+ * (i.e. to run 2.0 mds on 1.8 disk) (b11826)
+ */
+static const struct dt_object_operations osd_obj_ea_ops = {
+        .do_read_lock         = osd_object_read_lock,
+        .do_write_lock        = osd_object_write_lock,
+        .do_read_unlock       = osd_object_read_unlock,
+        .do_write_unlock      = osd_object_write_unlock,
+        .do_write_locked      = osd_object_write_locked,
+        .do_attr_get          = osd_attr_get,
+        .do_declare_attr_set  = osd_declare_attr_set,
+        .do_attr_set          = osd_attr_set,
+        .do_ah_init           = osd_ah_init,
+        .do_declare_create    = osd_declare_object_create,
+        .do_create            = osd_object_ea_create,
+        .do_declare_destroy   = osd_declare_object_destroy,
+        .do_destroy           = osd_object_destroy,
+        .do_index_try         = osd_index_try,
+        .do_declare_ref_add   = osd_declare_object_ref_add,
+        .do_ref_add           = osd_object_ref_add,
+        .do_declare_ref_del   = osd_declare_object_ref_del,
+        .do_ref_del           = osd_object_ref_del,
+        .do_xattr_get         = osd_xattr_get,
+        .do_declare_xattr_set = osd_declare_xattr_set,
+        .do_xattr_set         = osd_xattr_set,
+        .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,
+        .do_data_get          = osd_data_get,
+};
 
-static const struct dt_body_operations osd_body_ops = {
-        .dbo_read  = osd_read,
-        .dbo_write = osd_write
+static const struct dt_object_operations osd_obj_otable_it_ops = {
+       .do_attr_get    = osd_otable_it_attr_get,
+       .do_index_try   = osd_index_try,
 };
 
+static int osd_index_declare_iam_delete(const struct lu_env *env,
+                                        struct dt_object *dt,
+                                        const struct dt_key *key,
+                                        struct thandle *handle)
+{
+        struct osd_thandle    *oh;
+
+        oh = container_of0(handle, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, delete, osd_dto_credits_noquota[DTO_INDEX_DELETE]);
+
+       return 0;
+}
 
 /**
  *      delete a (key, value) pair from index \a dt specified by \a key
@@ -2668,14 +2862,16 @@ static const struct dt_body_operations osd_body_ops = {
  */
 
 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
-                                const struct dt_key *key, struct thandle *handle,
+                                const struct dt_key *key,
+                                struct thandle *handle,
                                 struct lustre_capa *capa)
 {
-        struct osd_object     *obj = osd_dt_obj(dt);
-        struct osd_thandle    *oh;
-        struct iam_path_descr *ipd;
-        struct iam_container  *bag = &obj->oo_dir->od_container;
-        int rc;
+        struct osd_thread_info *oti = osd_oti_get(env);
+        struct osd_object      *obj = osd_dt_obj(dt);
+        struct osd_thandle     *oh;
+        struct iam_path_descr  *ipd;
+        struct iam_container   *bag = &obj->oo_dir->od_container;
+        int                     rc;
 
         ENTRY;
 
@@ -2687,6 +2883,8 @@ static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
                 RETURN(-EACCES);
 
+        OSD_EXEC_OP(handle, delete);
+
         ipd = osd_idx_ipd_get(env, bag);
         if (unlikely(ipd == NULL))
                 RETURN(-ENOMEM);
@@ -2695,17 +2893,49 @@ static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
         LASSERT(oh->ot_handle != NULL);
         LASSERT(oh->ot_handle->h_transaction != NULL);
 
+       if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
+               /* swab quota uid/gid provided by caller */
+               oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
+               key = (const struct dt_key *)&oti->oti_quota_id;
+       }
+
         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
         osd_ipd_put(env, bag, ipd);
         LINVRNT(osd_invariant(obj));
         RETURN(rc);
 }
 
+static int osd_index_declare_ea_delete(const struct lu_env *env,
+                                      struct dt_object *dt,
+                                      const struct dt_key *key,
+                                      struct thandle *handle)
+{
+       struct osd_thandle *oh;
+       struct inode       *inode;
+       int                 rc;
+       ENTRY;
+
+       LASSERT(dt_object_exists(dt));
+       LASSERT(handle != NULL);
+
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, delete, osd_dto_credits_noquota[DTO_INDEX_DELETE]);
+
+       inode = osd_dt_obj(dt)->oo_inode;
+       LASSERT(inode);
+
+       rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
+                                  true, true, NULL, false);
+       RETURN(rc);
+}
+
 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
                                           struct dt_rec *fid)
 {
         struct osd_fid_pack *rec;
-        int rc = -ENODATA;
+        int                  rc = -ENODATA;
 
         if (de->file_type & LDISKFS_DIRENT_LUFID) {
                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
@@ -2725,7 +2955,8 @@ static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
  * \retval -ve, on error
  */
 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
-                               const struct dt_key *key, struct thandle *handle,
+                               const struct dt_key *key,
+                               struct thandle *handle,
                                struct lustre_capa *capa)
 {
         struct osd_object          *obj    = osd_dt_obj(dt);
@@ -2734,8 +2965,8 @@ static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
         struct osd_thandle         *oh;
         struct ldiskfs_dir_entry_2 *de;
         struct buffer_head         *bh;
-
-        int rc;
+        struct htree_lock          *hlock = NULL;
+        int                         rc;
 
         ENTRY;
 
@@ -2743,6 +2974,8 @@ static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
         LASSERT(dt_object_exists(dt));
         LASSERT(handle != NULL);
 
+        OSD_EXEC_OP(handle, delete);
+
         oh = container_of(handle, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle != NULL);
         LASSERT(oh->ot_handle->h_transaction != NULL);
@@ -2750,19 +2983,31 @@ static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
                 RETURN(-EACCES);
 
+       ll_vfs_dq_init(dir);
         dentry = osd_child_dentry_get(env, obj,
                                       (char *)key, strlen((char *)key));
 
-        cfs_down_write(&obj->oo_ext_idx_sem);
-        bh = ll_ldiskfs_find_entry(dir, dentry, &de);
+        if (obj->oo_hl_head != NULL) {
+                hlock = osd_oti_get(env)->oti_hlock;
+                ldiskfs_htree_lock(hlock, obj->oo_hl_head,
+                                   dir, LDISKFS_HLOCK_DEL);
+        } else {
+               down_write(&obj->oo_ext_idx_sem);
+        }
+
+        bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
         if (bh) {
                 rc = ldiskfs_delete_entry(oh->ot_handle,
-                                dir, de, bh);
+                                          dir, de, bh);
                 brelse(bh);
-        } else
+        } else {
                 rc = -ENOENT;
+        }
+        if (hlock != NULL)
+                ldiskfs_htree_unlock(hlock);
+        else
+               up_write(&obj->oo_ext_idx_sem);
 
-        cfs_up_write(&obj->oo_ext_idx_sem);
         LASSERT(osd_invariant(obj));
         RETURN(rc);
 }
@@ -2782,13 +3027,14 @@ static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
                                 struct dt_rec *rec, const struct dt_key *key,
                                 struct lustre_capa *capa)
 {
-        struct osd_object     *obj = osd_dt_obj(dt);
-        struct iam_path_descr *ipd;
-        struct iam_container  *bag = &obj->oo_dir->od_container;
+        struct osd_object      *obj = osd_dt_obj(dt);
+        struct iam_path_descr  *ipd;
+        struct iam_container   *bag = &obj->oo_dir->od_container;
         struct osd_thread_info *oti = osd_oti_get(env);
         struct iam_iterator    *it = &oti->oti_idx_it;
-        struct iam_rec *iam_rec;
-        int rc;
+        struct iam_rec         *iam_rec;
+        int                     rc;
+
         ENTRY;
 
         LASSERT(osd_invariant(obj));
@@ -2805,6 +3051,12 @@ static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
         /* got ipd now we can start iterator. */
         iam_it_init(it, bag, 0, ipd);
 
+       if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
+               /* swab quota uid/gid provided by caller */
+               oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
+               key = (const struct dt_key *)&oti->oti_quota_id;
+       }
+
         rc = iam_it_get(it, (struct iam_key *)key);
         if (rc >= 0) {
                 if (S_ISDIR(obj->oo_inode->i_mode))
@@ -2813,10 +3065,14 @@ static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
                         iam_rec = (struct iam_rec *) rec;
 
                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
+
                 if (S_ISDIR(obj->oo_inode->i_mode))
                         osd_fid_unpack((struct lu_fid *) rec,
                                        (struct osd_fid_pack *)iam_rec);
+               else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
+                       osd_quota_unpack(obj, rec);
         }
+
         iam_it_put(it);
         iam_it_fini(it);
         osd_ipd_put(env, bag, ipd);
@@ -2826,6 +3082,25 @@ static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
         RETURN(rc);
 }
 
+static int osd_index_declare_iam_insert(const struct lu_env *env,
+                                        struct dt_object *dt,
+                                        const struct dt_rec *rec,
+                                        const struct dt_key *key,
+                                        struct thandle *handle)
+{
+        struct osd_thandle *oh;
+
+        LASSERT(dt_object_exists(dt));
+        LASSERT(handle != NULL);
+
+        oh = container_of0(handle, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, insert, osd_dto_credits_noquota[DTO_INDEX_INSERT]);
+
+       return 0;
+}
+
 /**
  *      Inserts (key, value) pair in \a dt index object.
  *
@@ -2838,20 +3113,17 @@ static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
  *      \retval -ve failure
  */
 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
-                                const struct dt_rec *rec, const struct dt_key *key,
-                                struct thandle *th, struct lustre_capa *capa,
-                                int ignore_quota)
+                                const struct dt_rec *rec,
+                                const struct dt_key *key, struct thandle *th,
+                                struct lustre_capa *capa, int ignore_quota)
 {
         struct osd_object     *obj = osd_dt_obj(dt);
         struct iam_path_descr *ipd;
         struct osd_thandle    *oh;
         struct iam_container  *bag = &obj->oo_dir->od_container;
-#ifdef HAVE_QUOTA_SUPPORT
-        cfs_cap_t              save = cfs_curproc_cap_pack();
-#endif
         struct osd_thread_info *oti = osd_oti_get(env);
-        struct iam_rec *iam_rec = (struct iam_rec *)oti->oti_ldp;
-        int rc;
+        struct iam_rec         *iam_rec;
+        int                     rc;
 
         ENTRY;
 
@@ -2861,7 +3133,9 @@ static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
         LASSERT(th != NULL);
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
-                return -EACCES;
+               RETURN(-EACCES);
+
+        OSD_EXEC_OP(th, insert);
 
         ipd = osd_idx_ipd_get(env, bag);
         if (unlikely(ipd == NULL))
@@ -2870,21 +3144,22 @@ static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
         oh = container_of0(th, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle != NULL);
         LASSERT(oh->ot_handle->h_transaction != NULL);
-#ifdef HAVE_QUOTA_SUPPORT
-        if (ignore_quota)
-                cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
-        else
-                cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
-#endif
-        if (S_ISDIR(obj->oo_inode->i_mode))
-                osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
-        else
-                iam_rec = (struct iam_rec *) rec;
+       if (S_ISDIR(obj->oo_inode->i_mode)) {
+               iam_rec = (struct iam_rec *)oti->oti_ldp;
+               osd_fid_pack((struct osd_fid_pack *)iam_rec, rec, &oti->oti_fid);
+       } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
+               /* pack quota uid/gid */
+               oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
+               key = (const struct dt_key *)&oti->oti_quota_id;
+               /* pack quota record */
+               rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
+               iam_rec = (struct iam_rec *)rec;
+       } else {
+               iam_rec = (struct iam_rec *)rec;
+       }
+
         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
                         iam_rec, ipd);
-#ifdef HAVE_QUOTA_SUPPORT
-        cfs_curproc_cap_unpack(save);
-#endif
         osd_ipd_put(env, bag, ipd);
         LINVRNT(osd_invariant(obj));
         RETURN(rc);
@@ -2899,16 +3174,14 @@ static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
  * \retval -ve, on error
  */
 static int __osd_ea_add_rec(struct osd_thread_info *info,
-                            struct osd_object *pobj,
-                            struct inode  *cinode,
-                            const char *name,
-                            const struct dt_rec *fid,
-                            struct thandle *th)
+                            struct osd_object *pobj, struct inode  *cinode,
+                            const char *name, const struct dt_rec *fid,
+                            struct htree_lock *hlock, struct thandle *th)
 {
         struct ldiskfs_dentry_param *ldp;
-        struct dentry      *child;
-        struct osd_thandle *oth;
-        int rc;
+        struct dentry               *child;
+        struct osd_thandle          *oth;
+        int                          rc;
 
         oth = container_of(th, struct osd_thandle, ot_super);
         LASSERT(oth->ot_handle != NULL);
@@ -2916,14 +3189,22 @@ static int __osd_ea_add_rec(struct osd_thread_info *info,
 
         child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
 
+        /* XXX: remove fid_is_igif() check here.
+         * IGIF check is just to handle insertion of .. when it is 'ROOT',
+         * it is IGIF now but needs FID in dir entry as well for readdir
+         * to work.
+         * LU-838 should fix that and remove fid_is_igif() check */
         if (fid_is_igif((struct lu_fid *)fid) ||
-            fid_seq((struct lu_fid *)fid) >= FID_SEQ_NORMAL) {
+            fid_is_norm((struct lu_fid *)fid)) {
                 ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
                 osd_get_ldiskfs_dirent_param(ldp, fid);
-                child->d_fsdata = (void*) ldp;
-        } else
+                child->d_fsdata = (void *)ldp;
+        } else {
                 child->d_fsdata = NULL;
-        rc = ldiskfs_add_entry(oth->ot_handle, child, cinode);
+        }
+       LASSERT(pobj->oo_inode);
+       ll_vfs_dq_init(pobj->oo_inode);
+        rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
 
         RETURN(rc);
 }
@@ -2947,10 +3228,10 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
                               const struct dt_rec *dot_dot_fid,
                               struct thandle *th)
 {
-        struct inode            *inode  = dir->oo_inode;
+        struct inode                *inode = dir->oo_inode;
         struct ldiskfs_dentry_param *dot_ldp;
         struct ldiskfs_dentry_param *dot_dot_ldp;
-        struct osd_thandle      *oth;
+        struct osd_thandle          *oth;
         int result = 0;
 
         oth = container_of(th, struct osd_thandle, ot_super);
@@ -2971,7 +3252,7 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
 
                 if (!dir->oo_compat_dot_created)
                         return -EINVAL;
-                if (fid_seq((struct lu_fid *)dot_fid) >= FID_SEQ_NORMAL) {
+                if (!fid_is_igif((struct lu_fid *)dot_fid)) {
                         osd_get_ldiskfs_dirent_param(dot_ldp, dot_fid);
                         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
                 } else {
@@ -2981,11 +3262,11 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
                 /* in case of rename, dotdot is already created */
                 if (dir->oo_compat_dotdot_created) {
                         return __osd_ea_add_rec(info, dir, parent_dir, name,
-                                                dot_dot_fid, th);
+                                                dot_dot_fid, NULL, th);
                 }
 
-                result = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir, inode,
-                                                dot_ldp, dot_dot_ldp);
+                result = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
+                                                inode, dot_ldp, dot_dot_ldp);
                 if (result == 0)
                        dir->oo_compat_dotdot_created = 1;
         }
@@ -2998,27 +3279,95 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
  * It will call the appropriate osd_add* function and return the
  * value, return by respective functions.
  */
-static int osd_ea_add_rec(const struct lu_env *env,
-                          struct osd_object *pobj,
-                          struct inode *cinode,
-                          const char *name,
-                          const struct dt_rec *fid,
-                          struct thandle *th)
-{
-        struct osd_thread_info    *info   = osd_oti_get(env);
-        int rc;
+static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
+                          struct inode *cinode, const char *name,
+                          const struct dt_rec *fid, struct thandle *th)
+{
+        struct osd_thread_info *info   = osd_oti_get(env);
+        struct htree_lock      *hlock;
+        int                     rc;
+
+        hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
 
         if (name[0] == '.' && (name[1] == '\0' || (name[1] == '.' &&
-                                                   name[2] =='\0')))
+                                                   name[2] =='\0'))) {
+                if (hlock != NULL) {
+                        ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
+                                           pobj->oo_inode, 0);
+                } else {
+                       down_write(&pobj->oo_ext_idx_sem);
+                }
                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
                      (struct dt_rec *)lu_object_fid(&pobj->oo_dt.do_lu),
                                         fid, th);
+        } else {
+                if (hlock != NULL) {
+                        ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
+                                           pobj->oo_inode, LDISKFS_HLOCK_ADD);
+                } else {
+                       down_write(&pobj->oo_ext_idx_sem);
+                }
+
+                rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
+                                      hlock, th);
+        }
+        if (hlock != NULL)
+                ldiskfs_htree_unlock(hlock);
         else
-                rc = __osd_ea_add_rec(info, pobj, cinode, name, fid, th);
+               up_write(&pobj->oo_ext_idx_sem);
 
         return rc;
 }
 
+static void
+osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
+                     struct osd_idmap_cache *oic)
+{
+       struct osd_scrub    *scrub = &dev->od_scrub;
+       struct lu_fid       *fid   = &oic->oic_fid;
+       struct osd_inode_id *id    = &oti->oti_id;
+       int                  once  = 0;
+       int                  rc;
+       ENTRY;
+
+       if (!fid_is_norm(fid) && !fid_is_igif(fid))
+               RETURN_EXIT;
+
+again:
+       rc = osd_oi_lookup(oti, dev, fid, id);
+       if (rc != 0 && rc != -ENOENT)
+               RETURN_EXIT;
+
+       if (rc == 0 && osd_id_eq(id, &oic->oic_lid))
+               RETURN_EXIT;
+
+       if (thread_is_running(&scrub->os_thread)) {
+               rc = osd_oii_insert(dev, oic, rc == -ENOENT);
+               /* There is race condition between osd_oi_lookup and OI scrub.
+                * The OI scrub finished just after osd_oi_lookup() failure.
+                * Under such case, it is unnecessary to trigger OI scrub again,
+                * but try to call osd_oi_lookup() again. */
+               if (unlikely(rc == -EAGAIN))
+                       goto again;
+
+               RETURN_EXIT;
+       }
+
+       if (!dev->od_noscrub && ++once == 1) {
+               CDEBUG(D_LFSCK, "Trigger OI scrub by RPC for "DFID"\n",
+                      PFID(fid));
+               rc = osd_scrub_start(dev);
+               LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC for "DFID
+                              ", rc = %d [2]\n",
+                              LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
+                              PFID(fid), rc);
+               if (rc == 0)
+                       goto again;
+       }
+
+       EXIT;
+}
+
 /**
  * Calls ->lookup() to find dentry. From dentry get inode and
  * read inode's ea to get fid. This is required for  interoperability
@@ -3035,29 +3384,63 @@ static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
         struct ldiskfs_dir_entry_2 *de;
         struct buffer_head         *bh;
         struct lu_fid              *fid = (struct lu_fid *) rec;
-        int ino;
-        int rc;
+        struct htree_lock          *hlock = NULL;
+        int                         ino;
+        int                         rc;
 
         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
 
         dentry = osd_child_dentry_get(env, obj,
                                       (char *)key, strlen((char *)key));
 
-        cfs_down_read(&obj->oo_ext_idx_sem);
-        bh = ll_ldiskfs_find_entry(dir, dentry, &de);
-        if (bh) {
-                ino = le32_to_cpu(de->inode);
-                rc = osd_get_fid_from_dentry(de, rec);
+        if (obj->oo_hl_head != NULL) {
+                hlock = osd_oti_get(env)->oti_hlock;
+                ldiskfs_htree_lock(hlock, obj->oo_hl_head,
+                                   dir, LDISKFS_HLOCK_LOOKUP);
+        } else {
+               down_read(&obj->oo_ext_idx_sem);
+        }
 
-                /* done with de, release bh */
-                brelse(bh);
-                if (rc != 0)
-                        rc = osd_ea_fid_get(env, obj, ino, fid);
-        } else
-                rc = -ENOENT;
+        bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
+        if (bh) {
+               struct osd_thread_info *oti = osd_oti_get(env);
+               struct osd_idmap_cache *oic = &oti->oti_cache;
+               struct osd_device *dev = osd_obj2dev(obj);
+               struct osd_scrub *scrub = &dev->od_scrub;
+               struct scrub_file *sf = &scrub->os_file;
+
+               ino = le32_to_cpu(de->inode);
+               rc = osd_get_fid_from_dentry(de, rec);
+
+               /* done with de, release bh */
+               brelse(bh);
+               if (rc != 0)
+                       rc = osd_ea_fid_get(env, obj, ino, fid, &oic->oic_lid);
+               else
+                       osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
+               if (rc != 0) {
+                       fid_zero(&oic->oic_fid);
+                       GOTO(out, rc);
+               }
+
+               oic->oic_fid = *fid;
+               if ((scrub->os_pos_current <= ino) &&
+                   (sf->sf_flags & SF_INCONSISTENT ||
+                    ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
+                                     sf->sf_oi_bitmap)))
+                       osd_consistency_check(oti, dev, oic);
+       } else {
+               rc = -ENOENT;
+       }
+
+       GOTO(out, rc);
 
-        cfs_up_read(&obj->oo_ext_idx_sem);
-        RETURN (rc);
+out:
+       if (hlock != NULL)
+               ldiskfs_htree_unlock(hlock);
+       else
+               up_read(&obj->oo_ext_idx_sem);
+       return rc;
 }
 
 /**
@@ -3072,12 +3455,22 @@ struct osd_object *osd_object_find(const struct lu_env *env,
                                    struct dt_object *dt,
                                    const struct lu_fid *fid)
 {
-        struct lu_device         *ludev = dt->do_lu.lo_dev;
-        struct osd_object        *child = NULL;
-        struct lu_object         *luch;
-        struct lu_object         *lo;
-
-        luch = lu_object_find(env, ludev, fid, NULL);
+        struct lu_device  *ludev = dt->do_lu.lo_dev;
+        struct osd_object *child = NULL;
+        struct lu_object  *luch;
+        struct lu_object  *lo;
+
+       /*
+        * at this point topdev might not exist yet
+        * (i.e. MGS is preparing profiles). so we can
+        * not rely on topdev and instead lookup with
+        * our device passed as topdev. this can't work
+        * if the object isn't cached yet (as osd doesn't
+        * allocate lu_header). IOW, the object must be
+        * in the cache, otherwise lu_object_alloc() crashes
+        * -bzzz
+        */
+       luch = lu_object_find_at(env, ludev, fid, NULL);
         if (!IS_ERR(luch)) {
                 if (lu_object_exists(luch)) {
                         lo = lu_object_locate(luch->lo_header, ludev->ld_type);
@@ -3086,7 +3479,7 @@ struct osd_object *osd_object_find(const struct lu_env *env,
                         else
                                 LU_OBJECT_DEBUG(D_ERROR, env, luch,
                                                 "lu_object can't be located"
-                                                ""DFID"\n", PFID(fid));
+                                               DFID"\n", PFID(fid));
 
                         if (child == NULL) {
                                 lu_object_put(env, luch);
@@ -3097,6 +3490,7 @@ struct osd_object *osd_object_find(const struct lu_env *env,
                         LU_OBJECT_DEBUG(D_ERROR, env, luch,
                                         "lu_object does not exists "DFID"\n",
                                         PFID(fid));
+                       lu_object_put(env, luch);
                         child = ERR_PTR(-ENOENT);
                 }
         } else
@@ -3116,6 +3510,36 @@ static inline void osd_object_put(const struct lu_env *env,
         lu_object_put(env, &obj->oo_dt.do_lu);
 }
 
+static int osd_index_declare_ea_insert(const struct lu_env *env,
+                                      struct dt_object *dt,
+                                      const struct dt_rec *rec,
+                                      const struct dt_key *key,
+                                      struct thandle *handle)
+{
+       struct osd_thandle *oh;
+       struct inode       *inode;
+       int                 rc;
+       ENTRY;
+
+       LASSERT(dt_object_exists(dt));
+       LASSERT(handle != NULL);
+
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+
+       OSD_DECLARE_OP(oh, insert, osd_dto_credits_noquota[DTO_INDEX_INSERT]);
+
+       inode = osd_dt_obj(dt)->oo_inode;
+       LASSERT(inode);
+
+       /* We ignore block quota on meta pool (MDTs), so needn't
+        * calculate how many blocks will be consumed by this index
+        * insert */
+       rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
+                                  true, true, NULL, false);
+       RETURN(rc);
+}
+
 /**
  * Index add function for interoperability mode (b11826).
  * It will add the directory entry.This entry is needed to
@@ -3132,14 +3556,11 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
                                const struct dt_key *key, struct thandle *th,
                                struct lustre_capa *capa, int ignore_quota)
 {
-        struct osd_object        *obj   = osd_dt_obj(dt);
-        struct lu_fid            *fid   = (struct lu_fid *) rec;
-        const char               *name  = (const char *)key;
-        struct osd_object        *child;
-#ifdef HAVE_QUOTA_SUPPORT
-        cfs_cap_t                 save  = cfs_curproc_cap_pack();
-#endif
-        int rc;
+        struct osd_object *obj   = osd_dt_obj(dt);
+        struct lu_fid     *fid   = (struct lu_fid *) rec;
+        const char        *name  = (const char *)key;
+        struct osd_object *child;
+        int                rc;
 
         ENTRY;
 
@@ -3152,18 +3573,7 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
 
         child = osd_object_find(env, dt, fid);
         if (!IS_ERR(child)) {
-#ifdef HAVE_QUOTA_SUPPORT
-                if (ignore_quota)
-                        cfs_cap_raise(CFS_CAP_SYS_RESOURCE);
-                else
-                        cfs_cap_lower(CFS_CAP_SYS_RESOURCE);
-#endif
-                cfs_down_write(&obj->oo_ext_idx_sem);
                 rc = osd_ea_add_rec(env, obj, child->oo_inode, name, rec, th);
-                cfs_up_write(&obj->oo_ext_idx_sem);
-#ifdef HAVE_QUOTA_SUPPORT
-                cfs_curproc_cap_unpack(save);
-#endif
                 osd_object_put(env, child);
         } else {
                 rc = PTR_ERR(child);
@@ -3180,15 +3590,16 @@ static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
  */
 
 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
-                                 struct dt_object *dt,
-                                 struct lustre_capa *capa)
+                                     struct dt_object *dt,
+                                     __u32 unused,
+                                     struct lustre_capa *capa)
 {
-        struct osd_it_iam         *it;
+        struct osd_it_iam      *it;
         struct osd_thread_info *oti = osd_oti_get(env);
-        struct osd_object     *obj = osd_dt_obj(dt);
-        struct lu_object      *lo  = &dt->do_lu;
-        struct iam_path_descr *ipd;
-        struct iam_container  *bag = &obj->oo_dir->od_container;
+        struct osd_object      *obj = osd_dt_obj(dt);
+        struct lu_object       *lo  = &dt->do_lu;
+        struct iam_path_descr  *ipd;
+        struct iam_container   *bag = &obj->oo_dir->od_container;
 
         LASSERT(lu_object_exists(lo));
 
@@ -3213,7 +3624,7 @@ static struct dt_it *osd_it_iam_init(const struct lu_env *env,
 
 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
 {
-        struct osd_it_iam     *it = (struct osd_it_iam *)di;
+        struct osd_it_iam *it = (struct osd_it_iam *)di;
         struct osd_object *obj = it->oi_obj;
 
         iam_it_fini(&it->oi_it);
@@ -3233,9 +3644,16 @@ static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
  */
 
 static int osd_it_iam_get(const struct lu_env *env,
-                      struct dt_it *di, const struct dt_key *key)
+                          struct dt_it *di, const struct dt_key *key)
 {
-        struct osd_it_iam *it = (struct osd_it_iam *)di;
+       struct osd_thread_info  *oti = osd_oti_get(env);
+       struct osd_it_iam       *it = (struct osd_it_iam *)di;
+
+       if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
+               /* swab quota uid/gid */
+               oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
+               key = (struct dt_key *)&oti->oti_quota_id;
+       }
 
         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
 }
@@ -3277,9 +3695,20 @@ static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
                                  const struct dt_it *di)
 {
-        struct osd_it_iam *it = (struct osd_it_iam *)di;
+       struct osd_thread_info *oti = osd_oti_get(env);
+       struct osd_it_iam      *it = (struct osd_it_iam *)di;
+       struct osd_object      *obj = it->oi_obj;
+       struct dt_key          *key;
 
-        return (struct dt_key *)iam_it_key_get(&it->oi_it);
+       key = (struct dt_key *)iam_it_key_get(&it->oi_it);
+
+       if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
+               /* swab quota uid/gid */
+               oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
+               key = (struct dt_key *)&oti->oti_quota_id;
+       }
+
+       return key;
 }
 
 /**
@@ -3293,13 +3722,11 @@ static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
         return iam_it_key_size(&it->oi_it);
 }
 
-static inline void osd_it_append_attrs(struct lu_dirent*ent,
-                                       __u32 attr,
-                                       int len,
-                                       __u16 type)
+static inline void osd_it_append_attrs(struct lu_dirent *ent, __u32 attr,
+                                       int len, __u16 type)
 {
-        struct luda_type        *lt;
-        const unsigned           align = sizeof(struct luda_type) - 1;
+        struct luda_type *lt;
+        const unsigned    align = sizeof(struct luda_type) - 1;
 
         /* check if file type is required */
         if (attr & LUDA_TYPE) {
@@ -3318,12 +3745,9 @@ static inline void osd_it_append_attrs(struct lu_dirent*ent,
  */
 
 static inline void osd_it_pack_dirent(struct lu_dirent *ent,
-                                      struct lu_fid *fid,
-                                      __u64 offset,
-                                      char *name,
-                                      __u16 namelen,
-                                      __u16 type,
-                                      __u32 attr)
+                                      struct lu_fid *fid, __u64 offset,
+                                      char *name, __u16 namelen,
+                                      __u16 type, __u32 attr)
 {
         fid_cpu_to_le(&ent->lde_fid, fid);
         ent->lde_attrs = LUDA_FID;
@@ -3343,39 +3767,50 @@ static inline void osd_it_pack_dirent(struct lu_dirent *ent,
  */
 static int osd_it_iam_rec(const struct lu_env *env,
                           const struct dt_it *di,
-                          struct lu_dirent *lde,
-                          __u32 attr)
+                          struct dt_rec *dtrec, __u32 attr)
 {
-        struct osd_it_iam *it        = (struct osd_it_iam *)di;
-        struct osd_thread_info *info = osd_oti_get(env);
-        struct lu_fid     *fid       = &info->oti_fid;
-        const struct osd_fid_pack *rec;
-        char *name;
-        int namelen;
-        __u64 hash;
-        int rc;
+       struct osd_it_iam      *it   = (struct osd_it_iam *)di;
+       struct osd_thread_info *info = osd_oti_get(env);
+       ENTRY;
 
-        name = (char *)iam_it_key_get(&it->oi_it);
-        if (IS_ERR(name))
-                RETURN(PTR_ERR(name));
+       if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
+               const struct osd_fid_pack *rec;
+               struct lu_fid             *fid = &info->oti_fid;
+               struct lu_dirent          *lde = (struct lu_dirent *)dtrec;
+               char                      *name;
+               int                        namelen;
+               __u64                      hash;
+               int                        rc;
 
-        namelen = iam_it_key_size(&it->oi_it);
+               name = (char *)iam_it_key_get(&it->oi_it);
+               if (IS_ERR(name))
+                       RETURN(PTR_ERR(name));
 
-        rec = (const struct osd_fid_pack *) iam_it_rec_get(&it->oi_it);
-        if (IS_ERR(rec))
-                RETURN(PTR_ERR(rec));
+               namelen = iam_it_key_size(&it->oi_it);
 
-        rc = osd_fid_unpack(fid, rec);
-        if (rc)
-                RETURN(rc);
+               rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
+               if (IS_ERR(rec))
+                       RETURN(PTR_ERR(rec));
 
-        hash = iam_it_store(&it->oi_it);
+               rc = osd_fid_unpack(fid, rec);
+               if (rc)
+                       RETURN(rc);
 
-        /* IAM does not store object type in IAM index (dir) */
-        osd_it_pack_dirent(lde, fid, hash, name, namelen,
-                           0, LUDA_FID);
+               hash = iam_it_store(&it->oi_it);
 
-        return 0;
+               /* IAM does not store object type in IAM index (dir) */
+               osd_it_pack_dirent(lde, fid, hash, name, namelen,
+                                  0, LUDA_FID);
+       } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
+               iam_reccpy(&it->oi_it.ii_path.ip_leaf,
+                          (struct iam_rec *)dtrec);
+               osd_quota_unpack(it->oi_obj, dtrec);
+       } else {
+               iam_reccpy(&it->oi_it.ii_path.ip_leaf,
+                          (struct iam_rec *)dtrec);
+       }
+
+       RETURN(0);
 }
 
 /**
@@ -3400,7 +3835,7 @@ static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
  */
 
 static int osd_it_iam_load(const struct lu_env *env,
-                       const struct dt_it *di, __u64 hash)
+                           const struct dt_it *di, __u64 hash)
 {
         struct osd_it_iam *it = (struct osd_it_iam *)di;
 
@@ -3408,9 +3843,11 @@ static int osd_it_iam_load(const struct lu_env *env,
 }
 
 static const struct dt_index_operations osd_index_iam_ops = {
-        .dio_lookup = osd_index_iam_lookup,
-        .dio_insert = osd_index_iam_insert,
-        .dio_delete = osd_index_iam_delete,
+        .dio_lookup         = osd_index_iam_lookup,
+        .dio_declare_insert = osd_index_declare_iam_insert,
+        .dio_insert         = osd_index_iam_insert,
+        .dio_declare_delete = osd_index_declare_iam_delete,
+        .dio_delete         = osd_index_iam_delete,
         .dio_it     = {
                 .init     = osd_it_iam_init,
                 .fini     = osd_it_iam_fini,
@@ -3425,6 +3862,7 @@ static const struct dt_index_operations osd_index_iam_ops = {
         }
 };
 
+
 /**
  * Creates or initializes iterator context.
  *
@@ -3433,6 +3871,7 @@ static const struct dt_index_operations osd_index_iam_ops = {
  */
 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
                                     struct dt_object *dt,
+                                    __u32 attr,
                                     struct lustre_capa *capa)
 {
         struct osd_object       *obj  = osd_dt_obj(dt);
@@ -3454,6 +3893,10 @@ static struct dt_it *osd_it_ea_init(const struct lu_env *env,
         it->oie_obj             = obj;
         it->oie_file.f_pos      = 0;
         it->oie_file.f_dentry   = obj_dentry;
+        if (attr & LUDA_64BITHASH)
+               it->oie_file.f_mode |= FMODE_64BITHASH;
+        else
+               it->oie_file.f_mode |= FMODE_32BITHASH;
         it->oie_file.f_mapping    = obj->oo_inode->i_mapping;
         it->oie_file.f_op         = obj->oo_inode->i_fop;
         it->oie_file.private_data = NULL;
@@ -3573,22 +4016,34 @@ static int osd_ldiskfs_filldir(char *buf, const char *name, int namelen,
  * \retval   0 on success
  * \retval -ve on error
  */
-static int osd_ldiskfs_it_fill(const struct dt_it *di)
+static int osd_ldiskfs_it_fill(const struct lu_env *env,
+                               const struct dt_it *di)
 {
         struct osd_it_ea   *it    = (struct osd_it_ea *)di;
         struct osd_object  *obj   = it->oie_obj;
         struct inode       *inode = obj->oo_inode;
-        int                result = 0;
+        struct htree_lock  *hlock = NULL;
+        int                 result = 0;
 
         ENTRY;
         it->oie_dirent = it->oie_buf;
         it->oie_rd_dirent = 0;
 
-        cfs_down_read(&obj->oo_ext_idx_sem);
+        if (obj->oo_hl_head != NULL) {
+                hlock = osd_oti_get(env)->oti_hlock;
+                ldiskfs_htree_lock(hlock, obj->oo_hl_head,
+                                   inode, LDISKFS_HLOCK_READDIR);
+        } else {
+               down_read(&obj->oo_ext_idx_sem);
+        }
+
         result = inode->i_fop->readdir(&it->oie_file, it,
                                        (filldir_t) osd_ldiskfs_filldir);
 
-        cfs_up_read(&obj->oo_ext_idx_sem);
+        if (hlock != NULL)
+                ldiskfs_htree_unlock(hlock);
+        else
+               up_read(&obj->oo_ext_idx_sem);
 
         if (it->oie_rd_dirent == 0) {
                 result = -EIO;
@@ -3626,10 +4081,10 @@ static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
                 it->oie_it_dirent++;
                 RETURN(0);
         } else {
-                if (it->oie_file.f_pos == LDISKFS_HTREE_EOF)
+               if (it->oie_file.f_pos == ldiskfs_get_htree_eof(&it->oie_file))
                         rc = +1;
                 else
-                        rc = osd_ldiskfs_it_fill(di);
+                        rc = osd_ldiskfs_it_fill(env, di);
         }
 
         RETURN(rc);
@@ -3646,8 +4101,8 @@ static struct dt_key *osd_it_ea_key(const struct lu_env *env,
                                     const struct dt_it *di)
 {
         struct osd_it_ea *it = (struct osd_it_ea *)di;
-        ENTRY;
-        RETURN((struct dt_key *)it->oie_dirent->oied_name);
+
+        return (struct dt_key *)it->oie_dirent->oied_name;
 }
 
 /**
@@ -3660,8 +4115,8 @@ static struct dt_key *osd_it_ea_key(const struct lu_env *env,
 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
 {
         struct osd_it_ea *it = (struct osd_it_ea *)di;
-        ENTRY;
-        RETURN(it->oie_dirent->oied_namelen);
+
+        return it->oie_dirent->oied_namelen;
 }
 
 
@@ -3677,27 +4132,43 @@ static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
  * \retval -ve on error
  */
 static inline int osd_it_ea_rec(const struct lu_env *env,
-                                const struct dt_it *di,
-                                struct lu_dirent *lde,
-                                __u32 attr)
-{
-        struct osd_it_ea        *it     = (struct osd_it_ea *)di;
-        struct osd_object       *obj    = it->oie_obj;
-        struct lu_fid           *fid    = &it->oie_dirent->oied_fid;
-        int    rc = 0;
-
-        ENTRY;
-
-        if (!fid_is_sane(fid))
-                rc = osd_ea_fid_get(env, obj, it->oie_dirent->oied_ino, fid);
-
-        if (rc == 0)
-                osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
-                                   it->oie_dirent->oied_name,
-                                   it->oie_dirent->oied_namelen,
-                                   it->oie_dirent->oied_type,
-                                   attr);
-        RETURN(rc);
+                               const struct dt_it *di,
+                               struct dt_rec *dtrec, __u32 attr)
+{
+       struct osd_it_ea       *it    = (struct osd_it_ea *)di;
+       struct osd_object      *obj   = it->oie_obj;
+       struct osd_device      *dev   = osd_obj2dev(obj);
+       struct osd_scrub       *scrub = &dev->od_scrub;
+       struct scrub_file      *sf    = &scrub->os_file;
+       struct osd_thread_info *oti   = osd_oti_get(env);
+       struct osd_idmap_cache *oic   = &oti->oti_cache;
+       struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
+       struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
+       __u32                   ino   = it->oie_dirent->oied_ino;
+       int                     rc    = 0;
+       ENTRY;
+
+       if (!fid_is_sane(fid)) {
+               rc = osd_ea_fid_get(env, obj, ino, fid, &oic->oic_lid);
+               if (rc != 0) {
+                       fid_zero(&oic->oic_fid);
+                       RETURN(rc);
+               }
+       } else {
+               osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
+       }
+
+       osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
+                          it->oie_dirent->oied_name,
+                          it->oie_dirent->oied_namelen,
+                          it->oie_dirent->oied_type, attr);
+       oic->oic_fid = *fid;
+       if ((scrub->os_pos_current <= ino) &&
+           (sf->sf_flags & SF_INCONSISTENT ||
+            ldiskfs_test_bit(osd_oi_fid2idx(dev, fid), sf->sf_oi_bitmap)))
+               osd_consistency_check(oti, dev, oic);
+
+       RETURN(rc);
 }
 
 /**
@@ -3711,8 +4182,8 @@ static inline int osd_it_ea_rec(const struct lu_env *env,
 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
 {
         struct osd_it_ea *it = (struct osd_it_ea *)di;
-        ENTRY;
-        RETURN(it->oie_dirent->oied_off);
+
+        return it->oie_dirent->oied_off;
 }
 
 /**
@@ -3734,7 +4205,7 @@ static int osd_it_ea_load(const struct lu_env *env,
         ENTRY;
         it->oie_file.f_pos = hash;
 
-        rc =  osd_ldiskfs_it_fill(di);
+        rc =  osd_ldiskfs_it_fill(env, di);
         if (rc == 0)
                 rc = +1;
 
@@ -3765,7 +4236,6 @@ static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
                 return -EACCES;
 
         rc = osd_ea_lookup_rec(env, obj, rec, key);
-
         if (rc == 0)
                 rc = +1;
         RETURN(rc);
@@ -3776,9 +4246,11 @@ static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
  */
 static const struct dt_index_operations osd_index_ea_ops = {
-        .dio_lookup = osd_index_ea_lookup,
-        .dio_insert = osd_index_ea_insert,
-        .dio_delete = osd_index_ea_delete,
+        .dio_lookup         = osd_index_ea_lookup,
+        .dio_declare_insert = osd_index_declare_ea_insert,
+        .dio_insert         = osd_index_ea_insert,
+        .dio_declare_delete = osd_index_declare_ea_delete,
+        .dio_delete         = osd_index_ea_delete,
         .dio_it     = {
                 .init     = osd_it_ea_init,
                 .fini     = osd_it_ea_fini,
@@ -3799,19 +4271,26 @@ static void *osd_key_init(const struct lu_context *ctx,
         struct osd_thread_info *info;
 
         OBD_ALLOC_PTR(info);
-        if (info != NULL) {
-                OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
-                if (info->oti_it_ea_buf != NULL) {
-                        info->oti_env = container_of(ctx, struct lu_env,
-                                                     le_ctx);
-                } else {
-                        OBD_FREE_PTR(info);
-                        info = ERR_PTR(-ENOMEM);
-                }
-        } else {
-                info = ERR_PTR(-ENOMEM);
-        }
+        if (info == NULL)
+                return ERR_PTR(-ENOMEM);
+
+        OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
+        if (info->oti_it_ea_buf == NULL)
+                goto out_free_info;
+
+        info->oti_env = container_of(ctx, struct lu_env, le_ctx);
+
+        info->oti_hlock = ldiskfs_htree_lock_alloc();
+        if (info->oti_hlock == NULL)
+                goto out_free_ea;
+
         return info;
+
+ out_free_ea:
+        OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
+ out_free_info:
+        OBD_FREE_PTR(info);
+        return ERR_PTR(-ENOMEM);
 }
 
 static void osd_key_fini(const struct lu_context *ctx,
@@ -3819,6 +4298,8 @@ static void osd_key_fini(const struct lu_context *ctx,
 {
         struct osd_thread_info *info = data;
 
+        if (info->oti_hlock != NULL)
+                ldiskfs_htree_lock_free(info->oti_hlock);
         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
         OBD_FREE_PTR(info);
 }
@@ -3836,8 +4317,8 @@ static void osd_key_exit(const struct lu_context *ctx,
 /* type constructor/destructor: osd_type_init, osd_type_fini */
 LU_TYPE_INIT_FINI(osd, &osd_key);
 
-static struct lu_context_key osd_key = {
-        .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD,
+struct lu_context_key osd_key = {
+        .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
         .lct_init = osd_key_init,
         .lct_fini = osd_key_fini,
         .lct_exit = osd_key_exit
@@ -3847,68 +4328,124 @@ static struct lu_context_key osd_key = {
 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
                            const char *name, struct lu_device *next)
 {
-        int rc;
-        struct lu_context *ctx;
-
-        /* context for commit hooks */
-        ctx = &osd_dev(d)->od_env_for_commit.le_ctx;
-        rc = lu_context_init(ctx, LCT_MD_THREAD|LCT_REMEMBER|LCT_NOREF);
-        if (rc == 0) {
-                rc = osd_procfs_init(osd_dev(d), name);
-                ctx->lc_cookie = 0x3;
-        }
-        return rc;
+       struct osd_device *osd = osd_dev(d);
+
+       strncpy(osd->od_svname, name, MAX_OBD_NAME);
+       return osd_procfs_init(osd, name);
 }
 
 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
 {
-        struct osd_thread_info *info = osd_oti_get(env);
-        ENTRY;
-        if (o->od_obj_area != NULL) {
-                lu_object_put(env, &o->od_obj_area->do_lu);
-                o->od_obj_area = NULL;
-        }
-        osd_oi_fini(info, &o->od_oi);
+       ENTRY;
 
-        RETURN(0);
+       osd_scrub_cleanup(env, o);
+
+       if (o->od_fsops) {
+               fsfilt_put_ops(o->od_fsops);
+               o->od_fsops = NULL;
+       }
+
+       /* shutdown quota slave instance associated with the device */
+       if (o->od_quota_slave != NULL) {
+               qsd_fini(env, o->od_quota_slave);
+               o->od_quota_slave = NULL;
+       }
+
+       RETURN(0);
 }
 
 static int osd_mount(const struct lu_env *env,
                      struct osd_device *o, struct lustre_cfg *cfg)
 {
-        struct lustre_mount_info *lmi;
-        const char               *dev  = lustre_cfg_string(cfg, 0);
-        struct lustre_disk_data  *ldd;
-        struct lustre_sb_info    *lsi;
-
+       const char              *name  = lustre_cfg_string(cfg, 0);
+       const char              *dev  = lustre_cfg_string(cfg, 1);
+       const char              *opts;
+       unsigned long            page, s_flags, lmd_flags = 0;
+       struct page             *__page;
+       struct file_system_type *type;
+       char                    *options = NULL;
+       char                    *str;
+       int                       rc = 0;
         ENTRY;
-        if (o->od_mount != NULL) {
-                CERROR("Already mounted (%s)\n", dev);
-                RETURN(-EEXIST);
-        }
 
-        /* get mount */
-        lmi = server_get_mount(dev);
-        if (lmi == NULL) {
-                CERROR("Cannot get mount info for %s!\n", dev);
-                RETURN(-EFAULT);
-        }
+       if (o->od_mnt != NULL)
+               RETURN(0);
 
-        LASSERT(lmi != NULL);
-        /* save lustre_mount_info in dt_device */
-        o->od_mount = lmi;
+       if (strlen(dev) >= sizeof(o->od_mntdev))
+               RETURN(-E2BIG);
+       strcpy(o->od_mntdev, dev);
 
-        lsi = s2lsi(lmi->lmi_sb);
-        ldd = lsi->lsi_ldd;
+        o->od_fsops = fsfilt_get_ops(mt_str(LDD_MT_LDISKFS));
+        if (o->od_fsops == NULL) {
+                CERROR("Can't find fsfilt_ldiskfs\n");
+                RETURN(-ENOTSUPP);
+        }
 
-        if (ldd->ldd_flags & LDD_F_IAM_DIR) {
-                o->od_iop_mode = 0;
-                LCONSOLE_WARN("OSD: IAM mode enabled\n");
-        } else
-                o->od_iop_mode = 1;
+       OBD_PAGE_ALLOC(__page, CFS_ALLOC_STD);
+       if (__page == NULL)
+               GOTO(out, rc = -ENOMEM);
+
+       str = lustre_cfg_string(cfg, 2);
+       s_flags = simple_strtoul(str, NULL, 0);
+       str = strstr(str, ":");
+       if (str)
+               lmd_flags = simple_strtoul(str + 1, NULL, 0);
+       opts = lustre_cfg_string(cfg, 3);
+       page = (unsigned long)cfs_page_address(__page);
+       options = (char *)page;
+       *options = '\0';
+       if (opts == NULL)
+               strcat(options, "user_xattr,acl");
+       else
+               strcat(options, opts);
+
+       /* Glom up mount options */
+       if (*options != '\0')
+               strcat(options, ",");
+       strlcat(options, "no_mbcache", CFS_PAGE_SIZE);
+
+       type = get_fs_type("ldiskfs");
+       if (!type) {
+               CERROR("%s: cannot find ldiskfs module\n", name);
+               GOTO(out, rc = -ENODEV);
+       }
+
+       o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
+       cfs_module_put(type->owner);
+
+       if (IS_ERR(o->od_mnt)) {
+               rc = PTR_ERR(o->od_mnt);
+               CERROR("%s: can't mount %s: %d\n", name, dev, rc);
+               o->od_mnt = NULL;
+               GOTO(out, rc);
+       }
+
+       if (lvfs_check_rdonly(o->od_mnt->mnt_sb->s_bdev)) {
+               CERROR("%s: underlying device %s is marked as read-only. "
+                      "Setup failed\n", name, dev);
+               mntput(o->od_mnt);
+               o->od_mnt = NULL;
+               GOTO(out, rc = -EROFS);
+       }
+
+       if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
+           LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
+               CERROR("%s: device %s is mounted w/o journal\n", name, dev);
+               mntput(o->od_mnt);
+               o->od_mnt = NULL;
+               GOTO(out, rc = -EINVAL);
+       }
+
+       if (lmd_flags & LMD_FLG_NOSCRUB)
+               o->od_noscrub = 1;
 
-        o->od_obj_area = NULL;
-        RETURN(0);
+out:
+       if (__page)
+               OBD_PAGE_FREE(__page);
+       if (rc)
+               fsfilt_put_ops(o->od_fsops);
+
+        RETURN(rc);
 }
 
 static struct lu_device *osd_device_fini(const struct lu_env *env,
@@ -3917,6 +4454,10 @@ static struct lu_device *osd_device_fini(const struct lu_env *env,
         int rc;
         ENTRY;
 
+       rc = osd_shutdown(env, osd_dev(d));
+
+       osd_obj_map_fini(osd_dev(d));
+
         shrink_dcache_sb(osd_sb(osd_dev(d)));
         osd_sync(env, lu2dt_dev(d));
 
@@ -3926,46 +4467,132 @@ static struct lu_device *osd_device_fini(const struct lu_env *env,
                 RETURN (ERR_PTR(rc));
         }
 
-        if (osd_dev(d)->od_mount)
-                server_put_mount(osd_dev(d)->od_mount->lmi_name,
-                                 osd_dev(d)->od_mount->lmi_mnt);
-        osd_dev(d)->od_mount = NULL;
+       if (osd_dev(d)->od_mnt) {
+               mntput(osd_dev(d)->od_mnt);
+               osd_dev(d)->od_mnt = NULL;
+       }
 
-        lu_context_fini(&osd_dev(d)->od_env_for_commit.le_ctx);
         RETURN(NULL);
 }
 
+static int osd_device_init0(const struct lu_env *env,
+                           struct osd_device *o,
+                           struct lustre_cfg *cfg)
+{
+       struct lu_device        *l = osd2lu_dev(o);
+       struct osd_thread_info *info;
+       int                     rc;
+
+       /* if the module was re-loaded, env can loose its keys */
+       rc = lu_env_refill((struct lu_env *) env);
+       if (rc)
+               GOTO(out, rc);
+       info = osd_oti_get(env);
+       LASSERT(info);
+
+       l->ld_ops = &osd_lu_ops;
+       o->od_dt_dev.dd_ops = &osd_dt_ops;
+
+       spin_lock_init(&o->od_osfs_lock);
+       mutex_init(&o->od_otable_mutex);
+       o->od_osfs_age = cfs_time_shift_64(-1000);
+
+       o->od_capa_hash = init_capa_hash();
+       if (o->od_capa_hash == NULL)
+               GOTO(out, rc = -ENOMEM);
+
+       o->od_read_cache = 1;
+       o->od_writethrough_cache = 1;
+       o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
+
+       rc = osd_mount(env, o, cfg);
+       if (rc)
+               GOTO(out_capa, rc);
+
+       /* setup scrub, including OI files initialization */
+       rc = osd_scrub_setup(env, o);
+       if (rc < 0)
+               GOTO(out_mnt, rc);
+
+       strncpy(o->od_svname, lustre_cfg_string(cfg, 4),
+                       sizeof(o->od_svname) - 1);
+
+       rc = osd_obj_map_init(o);
+       if (rc != 0)
+               GOTO(out_scrub, rc);
+
+       rc = lu_site_init(&o->od_site, l);
+       if (rc)
+               GOTO(out_compat, rc);
+       o->od_site.ls_bottom_dev = l;
+
+       rc = lu_site_init_finish(&o->od_site);
+       if (rc)
+               GOTO(out_site, rc);
+
+       rc = osd_procfs_init(o, o->od_svname);
+       if (rc != 0) {
+               CERROR("%s: can't initialize procfs: rc = %d\n",
+                      o->od_svname, rc);
+               GOTO(out_site, rc);
+       }
+
+       LASSERT(l->ld_site->ls_linkage.next && l->ld_site->ls_linkage.prev);
+
+       /* initialize quota slave instance */
+       o->od_quota_slave = qsd_init(env, o->od_svname, &o->od_dt_dev,
+                                    o->od_proc_entry);
+       if (IS_ERR(o->od_quota_slave)) {
+               rc = PTR_ERR(o->od_quota_slave);
+               o->od_quota_slave = NULL;
+               GOTO(out_procfs, rc);
+       }
+
+       RETURN(0);
+out_procfs:
+       osd_procfs_fini(o);
+out_site:
+       lu_site_fini(&o->od_site);
+out_compat:
+       osd_obj_map_fini(o);
+out_scrub:
+       osd_scrub_cleanup(env, o);
+out_mnt:
+       osd_oi_fini(info, o);
+       osd_shutdown(env, o);
+       mntput(o->od_mnt);
+       o->od_mnt = NULL;
+out_capa:
+       cleanup_capa_hash(o->od_capa_hash);
+out:
+       RETURN(rc);
+}
+
 static struct lu_device *osd_device_alloc(const struct lu_env *env,
                                           struct lu_device_type *t,
                                           struct lustre_cfg *cfg)
 {
-        struct lu_device  *l;
-        struct osd_device *o;
-
-        OBD_ALLOC_PTR(o);
-        if (o != NULL) {
-                int result;
-
-                result = dt_device_init(&o->od_dt_dev, t);
-                if (result == 0) {
-                        l = osd2lu_dev(o);
-                        l->ld_ops = &osd_lu_ops;
-                        o->od_dt_dev.dd_ops = &osd_dt_ops;
-                        cfs_spin_lock_init(&o->od_osfs_lock);
-                        o->od_osfs_age = cfs_time_shift_64(-1000);
-                        o->od_capa_hash = init_capa_hash();
-                        if (o->od_capa_hash == NULL) {
-                                dt_device_fini(&o->od_dt_dev);
-                                l = ERR_PTR(-ENOMEM);
-                        }
-                } else
-                        l = ERR_PTR(result);
+       struct osd_device *o;
+       int                rc;
 
-                if (IS_ERR(l))
-                        OBD_FREE_PTR(o);
-        } else
-                l = ERR_PTR(-ENOMEM);
-        return l;
+       OBD_ALLOC_PTR(o);
+       if (o == NULL)
+               return ERR_PTR(-ENOMEM);
+
+       rc = dt_device_init(&o->od_dt_dev, t);
+       if (rc == 0) {
+               /* Because the ctx might be revived in dt_device_init,
+                * refill the env here */
+               lu_env_refill((struct lu_env *)env);
+               rc = osd_device_init0(env, o, cfg);
+               if (rc)
+                       dt_device_fini(&o->od_dt_dev);
+       }
+
+       if (unlikely(rc != 0))
+               OBD_FREE_PTR(o);
+
+       return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
 }
 
 static struct lu_device *osd_device_free(const struct lu_env *env,
@@ -3975,6 +4602,14 @@ static struct lu_device *osd_device_free(const struct lu_env *env,
         ENTRY;
 
         cleanup_capa_hash(o->od_capa_hash);
+       /* XXX: make osd top device in order to release reference */
+       d->ld_site->ls_top_dev = d;
+       lu_site_purge(env, d->ld_site, -1);
+       if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
+               LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
+               lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
+       }
+       lu_site_fini(&o->od_site);
         dt_device_fini(&o->od_dt_dev);
         OBD_FREE_PTR(o);
         RETURN(NULL);
@@ -3992,8 +4627,9 @@ static int osd_process_config(const struct lu_env *env,
                 err = osd_mount(env, o, cfg);
                 break;
         case LCFG_CLEANUP:
-                err = osd_shutdown(env, o);
-                break;
+               lu_dev_del_linkage(d->ld_site, d);
+               err = osd_shutdown(env, o);
+               break;
         default:
                 err = -ENOSYS;
         }
@@ -4004,50 +4640,92 @@ static int osd_process_config(const struct lu_env *env,
 static int osd_recovery_complete(const struct lu_env *env,
                                  struct lu_device *d)
 {
-        RETURN(0);
+       struct osd_device       *osd = osd_dev(d);
+       int                      rc = 0;
+       ENTRY;
+
+       if (osd->od_quota_slave == NULL)
+               RETURN(0);
+
+       /* start qsd instance on recovery completion, this notifies the quota
+        * slave code that we are about to process new requests now */
+       rc = qsd_start(env, osd->od_quota_slave);
+       RETURN(rc);
+}
+
+/*
+ * we use exports to track all osd users
+ */
+static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
+                          struct obd_device *obd, struct obd_uuid *cluuid,
+                          struct obd_connect_data *data, void *localdata)
+{
+       struct osd_device    *osd = osd_dev(obd->obd_lu_dev);
+       struct lustre_handle  conn;
+       int                   rc;
+       ENTRY;
+
+       CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
+
+       rc = class_connect(&conn, obd, cluuid);
+       if (rc)
+               RETURN(rc);
+
+       *exp = class_conn2export(&conn);
+
+       spin_lock(&osd->od_osfs_lock);
+       osd->od_connects++;
+       spin_unlock(&osd->od_osfs_lock);
+
+       RETURN(0);
+}
+
+/*
+ * once last export (we don't count self-export) disappeared
+ * osd can be released
+ */
+static int osd_obd_disconnect(struct obd_export *exp)
+{
+       struct obd_device *obd = exp->exp_obd;
+       struct osd_device *osd = osd_dev(obd->obd_lu_dev);
+       int                rc, release = 0;
+       ENTRY;
+
+       /* Only disconnect the underlying layers on the final disconnect. */
+       spin_lock(&osd->od_osfs_lock);
+       osd->od_connects--;
+       if (osd->od_connects == 0)
+               release = 1;
+       spin_unlock(&osd->od_osfs_lock);
+
+       rc = class_disconnect(exp); /* bz 9811 */
+
+       if (rc == 0 && release)
+               class_manual_cleanup(obd);
+       RETURN(rc);
 }
 
-static int osd_prepare(const struct lu_env *env,
-                       struct lu_device *pdev,
+static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
                        struct lu_device *dev)
 {
-        struct osd_device *osd = osd_dev(dev);
-        struct lustre_sb_info *lsi;
-        struct lustre_disk_data *ldd;
-        struct lustre_mount_info  *lmi;
-        struct osd_thread_info *oti = osd_oti_get(env);
-        struct dt_object *d;
-        int result;
+       struct osd_device *osd = osd_dev(dev);
+       int                result = 0;
+       ENTRY;
 
-        ENTRY;
-        /* 1. initialize oi before any file create or file open */
-        result = osd_oi_init(oti, &osd->od_oi,
-                             &osd->od_dt_dev, lu2md_dev(pdev));
-        if (result != 0)
-                RETURN(result);
-
-        lmi = osd->od_mount;
-        lsi = s2lsi(lmi->lmi_sb);
-        ldd = lsi->lsi_ldd;
-
-        /* 2. setup local objects */
-        result = llo_local_objects_setup(env, lu2md_dev(pdev), lu2dt_dev(dev));
-        if (result)
-                goto out;
-
-        /* 3. open remote object dir */
-        d = dt_store_open(env, lu2dt_dev(dev), "",
-                          remote_obj_dir, &oti->oti_fid);
-        if (!IS_ERR(d)) {
-                osd->od_obj_area = d;
-                result = 0;
-        } else {
-                result = PTR_ERR(d);
-                osd->od_obj_area = NULL;
-        }
+       if (dev->ld_site && lu_device_is_md(dev->ld_site->ls_top_dev)) {
+               /* MDT/MDD still use old infrastructure to create
+                * special files */
+               result = llo_local_objects_setup(env, lu2md_dev(pdev),
+                                                lu2dt_dev(dev));
+               if (result)
+                       RETURN(result);
+       }
 
-out:
-        RETURN(result);
+       if (osd->od_quota_slave != NULL)
+               /* set up quota slave objects */
+               result = qsd_prepare(env, osd->od_quota_slave);
+
+       RETURN(result);
 }
 
 static const struct lu_object_operations osd_lu_obj_ops = {
@@ -4059,7 +4737,7 @@ static const struct lu_object_operations osd_lu_obj_ops = {
         .loo_object_invariant = osd_object_invariant
 };
 
-static const struct lu_device_operations osd_lu_ops = {
+const struct lu_device_operations osd_lu_ops = {
         .ldo_object_alloc      = osd_object_alloc,
         .ldo_process_config    = osd_process_config,
         .ldo_recovery_complete = osd_recovery_complete,
@@ -4080,25 +4758,20 @@ static const struct lu_device_type_operations osd_device_type_ops = {
         .ldto_device_fini    = osd_device_fini
 };
 
-static struct lu_device_type osd_device_type = {
+struct lu_device_type osd_device_type = {
         .ldt_tags     = LU_DEVICE_DT,
-        .ldt_name     = LUSTRE_OSD_NAME,
+       .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
         .ldt_ops      = &osd_device_type_ops,
-        .ldt_ctx_tags = LCT_MD_THREAD|LCT_DT_THREAD
+        .ldt_ctx_tags = LCT_LOCAL,
 };
 
 /*
  * lprocfs legacy support.
  */
 static struct obd_ops osd_obd_device_ops = {
-        .o_owner = THIS_MODULE
-};
-
-static struct lu_local_obj_desc llod_osd_rem_obj_dir = {
-        .llod_name      = remote_obj_dir,
-        .llod_oid       = OSD_REM_OBJ_DIR_OID,
-        .llod_is_index  = 1,
-        .llod_feat      = &dt_directory_features,
+       .o_owner = THIS_MODULE,
+       .o_connect      = osd_obd_connect,
+       .o_disconnect   = osd_obd_disconnect
 };
 
 static int __init osd_mod_init(void)
@@ -4106,20 +4779,18 @@ static int __init osd_mod_init(void)
         struct lprocfs_static_vars lvars;
 
         osd_oi_mod_init();
-        llo_local_obj_register(&llod_osd_rem_obj_dir);
         lprocfs_osd_init_vars(&lvars);
         return class_register_type(&osd_obd_device_ops, NULL, lvars.module_vars,
-                                   LUSTRE_OSD_NAME, &osd_device_type);
+                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
 }
 
 static void __exit osd_mod_exit(void)
 {
-        llo_local_obj_unregister(&llod_osd_rem_obj_dir);
-        class_unregister_type(LUSTRE_OSD_NAME);
+       class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
 }
 
 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
-MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_NAME")");
+MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
 MODULE_LICENSE("GPL");
 
-cfs_module(osd, "0.0.2", osd_mod_init, osd_mod_exit);
+cfs_module(osd, "0.1.0", osd_mod_init, osd_mod_exit);