Whamcloud - gitweb
LU-812 ldiskfs: super_operations->dirty_inode now takes a flag
[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
index d0a162a..e1bc36f 100644 (file)
@@ -27,7 +27,7 @@
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2012, Whamcloud, Inc.
+ * Copyright (c) 2011, 2012, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -53,8 +53,6 @@
 #include <linux/fs.h>
 /* XATTR_{REPLACE,CREATE} */
 #include <linux/xattr.h>
-/* simple_mkdir() */
-#include <lvfs.h>
 
 /*
  * struct OBD_{ALLOC,FREE}*()
 #include <obd_support.h>
 /* struct ptlrpc_thread */
 #include <lustre_net.h>
-
-/* fid_is_local() */
 #include <lustre_fid.h>
 
 #include "osd_internal.h"
-#include "osd_igif.h"
 
 /* llo_* api support */
 #include <md_object.h>
-/* dt_acct_features */
-#include <lquota.h>
+#include <lustre_quota.h>
 
-#ifdef HAVE_LDISKFS_PDO
 int ldiskfs_pdo = 1;
 CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
                 "ldiskfs with parallel directory operations");
-#else
-int ldiskfs_pdo = 0;
-#endif
 
 static const char dot[] = ".";
 static const char dotdot[] = "..";
@@ -94,6 +84,22 @@ 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;
 
+#ifdef OSD_TRACK_DECLARES
+int osd_trans_declare_op2rb[] = {
+       [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
+       [OSD_OT_PUNCH]          = OSD_OT_MAX,
+       [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
+       [OSD_OT_CREATE]         = OSD_OT_DESTROY,
+       [OSD_OT_DESTROY]        = OSD_OT_CREATE,
+       [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
+       [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
+       [OSD_OT_WRITE]          = OSD_OT_WRITE,
+       [OSD_OT_INSERT]         = OSD_OT_DELETE,
+       [OSD_OT_DELETE]         = OSD_OT_INSERT,
+       [OSD_OT_QUOTA]          = OSD_OT_MAX,
+};
+#endif
+
 static int osd_has_index(const struct osd_object *obj)
 {
         return obj->oo_dt.do_index_ops != NULL;
@@ -104,51 +110,6 @@ 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, bool is_md)
-{
-       struct md_ucred *uc;
-        struct cred     *tc;
-
-       if (!is_md)
-               /* OFD support */
-               return;
-
-       uc = md_ucred(env);
-
-        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, bool is_md)
-{
-        struct cred *tc;
-
-       if (!is_md)
-               /* OFD support */
-               return;
-
-        if ((tc = prepare_creds())) {
-                tc->fsuid         = save->oc_uid;
-                tc->fsgid         = save->oc_gid;
-                tc->cap_effective = save->oc_cap;
-                commit_creds(tc);
-        }
-}
-#endif
-
 /*
  * Concurrency: doesn't matter
  */
@@ -176,51 +137,6 @@ static int osd_root_get(const struct lu_env *env,
         return 0;
 }
 
-static inline int osd_qid_type(struct osd_thandle *oh, int i)
-{
-        return (oh->ot_id_type & (1 << i)) ? GRPQUOTA : USRQUOTA;
-}
-
-static inline void osd_qid_set_type(struct osd_thandle *oh, int i, int type)
-{
-        oh->ot_id_type |= ((type == GRPQUOTA) ? (1 << i) : 0);
-}
-
-void osd_declare_qid(struct dt_object *dt, struct osd_thandle *oh,
-                     int type, uid_t id, struct inode *inode)
-{
-#ifdef CONFIG_QUOTA
-        int i, allocated = 0;
-        struct osd_object *obj;
-
-        LASSERT(dt != NULL);
-        LASSERT(oh != NULL);
-        LASSERTF(oh->ot_id_cnt <= OSD_MAX_UGID_CNT, "count=%u",
-                 oh->ot_id_cnt);
-
-        /* id entry is allocated in the quota file */
-        if (inode && inode->i_dquot[type] && inode->i_dquot[type]->dq_off)
-                allocated = 1;
-
-        for (i = 0; i < oh->ot_id_cnt; i++) {
-                if (oh->ot_id_array[i] == id && osd_qid_type(oh, i) == type)
-                        return;
-        }
-
-        if (unlikely(i >= OSD_MAX_UGID_CNT)) {
-                CERROR("more than %d uid/gids for a transaction?\n", i);
-                return;
-        }
-
-        oh->ot_id_array[i] = id;
-        osd_qid_set_type(oh, i, type);
-        oh->ot_id_cnt++;
-        obj = osd_dt_obj(dt);
-        oh->ot_credits += (allocated || id == 0) ?
-                1 : LDISKFS_QUOTA_INIT_BLOCKS(osd_sb(osd_obj2dev(obj)));
-#endif
-}
-
 /*
  * OSD object methods.
  */
@@ -241,29 +157,39 @@ 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 {
                 return NULL;
         }
 }
 
-static int osd_get_lma(struct inode *inode, struct dentry *dentry,
-                      struct lustre_mdt_attrs *lma)
+static inline int __osd_xattr_get(struct inode *inode, struct dentry *dentry,
+                                 const char *name, void *buf, int len)
+{
+       dentry->d_inode = inode;
+       return inode->i_op->getxattr(dentry, name, buf, len);
+}
+
+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));
+       rc = __osd_xattr_get(inode, 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)) {
@@ -330,8 +256,9 @@ struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
        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)
+static 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;
@@ -341,11 +268,14 @@ struct inode *osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
        if (IS_ERR(inode))
                return inode;
 
-       rc = osd_get_lma(inode, &info->oti_obj_dentry, lma);
+       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);
+               if (unlikely(inode == osd_sb(dev)->s_root->d_inode))
+                       lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
+               else
+                       lu_igif_build(fid, inode->i_ino, inode->i_generation);
        } else {
                iput(inode);
                inode = ERR_PTR(rc);
@@ -365,13 +295,11 @@ osd_iget_verify(struct osd_thread_info *info, struct osd_device *dev,
        if (IS_ERR(inode))
                return inode;
 
-       rc = osd_get_lma(inode, &info->oti_obj_dentry, lma);
+       rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
+       if (rc == -ENODATA)
+               return inode;
+
        if (rc != 0) {
-               if (rc == -ENODATA) {
-                       CDEBUG(D_LFSCK, "inconsistent obj: NULL, %lu, "DFID"\n",
-                              inode->i_ino, PFID(fid));
-                       rc = -EREMCHG;
-               }
                iput(inode);
                return ERR_PTR(rc);
        }
@@ -380,8 +308,9 @@ osd_iget_verify(struct osd_thread_info *info, struct osd_device *dev,
                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 ERR_PTR(-EREMCHG);
        }
+
        return inode;
 }
 
@@ -411,27 +340,26 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
        info = osd_oti_get(env);
        LASSERT(info);
        oic = &info->oti_cache;
-       id  = &oic->oic_lid;
 
        if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
                RETURN(-ENOENT);
 
-       if (fid_is_norm(fid)) {
-               /* Search order: 1. per-thread cache. */
-               if (lu_fid_eq(fid, &oic->oic_fid)) {
-                       goto iget;
-               } else 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;
-               }
+       /* Search order: 1. per-thread cache. */
+       if (lu_fid_eq(fid, &oic->oic_fid)) {
+               id = &oic->oic_lid;
+               goto iget;
+       }
 
-               if (sf->sf_flags & SF_INCONSISTENT)
-                       verify = 1;
+       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;
        }
 
-       fid_zero(&oic->oic_fid);
+       if (sf->sf_flags & SF_INCONSISTENT)
+               verify = 1;
 
        /*
         * Objects are created as locking anchors or place holders for objects
@@ -440,13 +368,13 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
         * 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)
+       if (conf != NULL && conf->loc_flags & LOC_F_NEW)
                GOTO(out, result = 0);
 
        /* Search order: 3. OI files. */
-       result = osd_oi_lookup(info, dev, fid, id);
+       result = osd_oi_lookup(info, dev, fid, id, true);
        if (result == -ENOENT) {
-               if (!fid_is_norm(fid) ||
+               if (!fid_is_norm(fid) || fid_is_on_ost(info, dev, fid) ||
                    !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
                                      sf->sf_oi_bitmap))
                        GOTO(out, result = 0);
@@ -465,13 +393,14 @@ iget:
        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 (!scrub->os_no_scrub) {
+                       } else if (!dev->od_noscrub) {
                                result = osd_scrub_start(dev);
                                LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC "
                                               "for "DFID", rc = %d [1]\n",
@@ -489,10 +418,9 @@ trigger:
 
         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;
-        }
+
+       obj->oo_compat_dot_created = 1;
+       obj->oo_compat_dotdot_created = 1;
 
         if (!S_ISDIR(inode->i_mode) || !ldiskfs_pdo) /* done */
                GOTO(out, result = 0);
@@ -534,17 +462,17 @@ static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 
        LINVRNT(osd_invariant(obj));
 
+       if (fid_is_otable_it(&l->lo_header->loh_fid)) {
+               obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
+               l->lo_header->loh_attr |= LOHA_EXISTS;
+               return 0;
+       }
+
        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;
-               }
-       }
+       if (result == 0 && obj->oo_inode != NULL)
+               osd_object_init0(obj);
+
        LINVRNT(osd_invariant(obj));
        return result;
 }
@@ -622,8 +550,7 @@ 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)
 {
@@ -683,23 +610,19 @@ 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 thandle *th)
+static int osd_param_is_not_sane(const struct osd_device *dev,
+                                const struct thandle *th)
 {
-        struct osd_thandle *oh;
-        oh = container_of0(th, struct osd_thandle, ot_super);
-        return oh->ot_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 ldiskfs_journal_cb_entry *jcb, int error)
 {
         struct osd_thandle *oh = container_of0(jcb, struct osd_thandle, ot_jcb);
         struct thandle     *th  = &oh->ot_super;
@@ -746,6 +669,8 @@ static struct thandle *osd_trans_create(const struct lu_env *env,
         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;
@@ -754,6 +679,11 @@ static struct thandle *osd_trans_create(const struct lu_env *env,
                 oti->oti_dev = osd_dt_dev(d);
                 CFS_INIT_LIST_HEAD(&oh->ot_dcb_list);
                 osd_th_alloced(oh);
+
+               memset(oti->oti_declare_ops, 0, OSD_OT_MAX);
+               memset(oti->oti_declare_ops_rb, 0, OSD_OT_MAX);
+               memset(oti->oti_declare_ops_cred, 0, OSD_OT_MAX);
+               oti->oti_rollback = false;
         }
         RETURN(th);
 }
@@ -782,30 +712,60 @@ int osd_trans_start(const struct lu_env *env, struct dt_device *d,
         if (rc != 0)
                 GOTO(out, rc);
 
-        if (!osd_param_is_sane(dev, th)) {
+       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);
-                /* 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;
 #ifdef OSD_TRACK_DECLARES
-                CERROR("  attr_set: %d, punch: %d, xattr_set: %d,\n",
-                       oh->ot_declare_attr_set, oh->ot_declare_punch,
-                       oh->ot_declare_xattr_set);
-                CERROR("  create: %d, ref_add: %d, ref_del: %d, write: %d\n",
-                       oh->ot_declare_create, oh->ot_declare_ref_add,
-                       oh->ot_declare_ref_del, oh->ot_declare_write);
-                CERROR("  insert: %d, delete: %d, destroy: %d\n",
-                       oh->ot_declare_insert, oh->ot_declare_delete,
-                       oh->ot_declare_destroy);
+               CWARN("  create: %u/%u, delete: %u/%u, destroy: %u/%u\n",
+                     oti->oti_declare_ops[OSD_OT_CREATE],
+                     oti->oti_declare_ops_cred[OSD_OT_CREATE],
+                     oti->oti_declare_ops[OSD_OT_DELETE],
+                     oti->oti_declare_ops_cred[OSD_OT_DELETE],
+                     oti->oti_declare_ops[OSD_OT_DESTROY],
+                     oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
+               CWARN("  attr_set: %u/%u, xattr_set: %u/%u\n",
+                     oti->oti_declare_ops[OSD_OT_ATTR_SET],
+                     oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
+                     oti->oti_declare_ops[OSD_OT_XATTR_SET],
+                     oti->oti_declare_ops_cred[OSD_OT_XATTR_SET]);
+               CWARN("  write: %u/%u, punch: %u/%u, quota %u/%u\n",
+                     oti->oti_declare_ops[OSD_OT_WRITE],
+                     oti->oti_declare_ops_cred[OSD_OT_WRITE],
+                     oti->oti_declare_ops[OSD_OT_PUNCH],
+                     oti->oti_declare_ops_cred[OSD_OT_PUNCH],
+                     oti->oti_declare_ops[OSD_OT_QUOTA],
+                     oti->oti_declare_ops_cred[OSD_OT_QUOTA]);
+               CWARN("  insert: %u/%u, delete: %u/%u\n",
+                     oti->oti_declare_ops[OSD_OT_INSERT],
+                     oti->oti_declare_ops_cred[OSD_OT_INSERT],
+                     oti->oti_declare_ops[OSD_OT_DESTROY],
+                     oti->oti_declare_ops_cred[OSD_OT_DESTROY]);
+               CWARN("  ref_add: %u/%u, ref_del: %u/%u\n",
+                     oti->oti_declare_ops[OSD_OT_REF_ADD],
+                     oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
+                     oti->oti_declare_ops[OSD_OT_REF_DEL],
+                     oti->oti_declare_ops_cred[OSD_OT_REF_DEL]);
+
+               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
@@ -822,22 +782,6 @@ int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                 lu_device_get(&d->dd_lu_dev);
                 oh->ot_dev_link = lu_ref_add(&d->dd_lu_dev.ld_reference,
                                              "osd-tx", th);
-
-                /*
-                 * XXX: current rule is that we first start tx,
-                 *      then lock object(s), but we can't use
-                 *      this rule for data (due to locking specifics
-                 *      in ldiskfs). also in long-term we'd like to
-                 *      use usually-used (locks;tx) ordering. so,
-                 *      UGLY thing is that we'll use one ordering for
-                 *      data (ofd) and reverse ordering for metadata
-                 *      (mdd). then at some point we'll fix the latter
-                 */
-               if (dev->od_is_md) {
-                        LASSERT(oti->oti_r_locks == 0);
-                        LASSERT(oti->oti_w_locks == 0);
-                }
-
                 oti->oti_txns++;
                 rc = 0;
         } else {
@@ -856,43 +800,37 @@ static int osd_trans_stop(const struct lu_env *env, struct thandle *th)
         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;
 
-                hdl->h_sync = th->th_sync;
-
                 /*
                  * 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,
+                ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
                                          &oh->ot_jcb);
 
                 LASSERT(oti->oti_txns == 1);
                 oti->oti_txns--;
-                /*
-                 * XXX: current rule is that we first start tx,
-                 *      then lock object(s), but we can't use
-                 *      this rule for data (due to locking specifics
-                 *      in ldiskfs). also in long-term we'd like to
-                 *      use usually-used (locks;tx) ordering. so,
-                 *      UGLY thing is that we'll use one ordering for
-                 *      data (ofd) and reverse ordering for metadata
-                 *      (mdd). then at some point we'll fix the latter
-                 */
-               if (osd_dt_dev(th->th_dev)->od_is_md) {
-                        LASSERT(oti->oti_r_locks == 0);
-                        LASSERT(oti->oti_w_locks == 0);
-                }
                 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,
                                   rc = ldiskfs_journal_stop(hdl));
@@ -951,8 +889,24 @@ static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 
         osd_index_fini(obj);
         if (inode != NULL) {
+               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);
+               }
         }
 }
 
@@ -977,7 +931,8 @@ 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,
@@ -995,7 +950,7 @@ int osd_statfs(const struct lu_env *env, struct dt_device *d,
         struct kstatfs     *ksfs;
         int result = 0;
 
-       if (unlikely(osd->od_mount == NULL))
+       if (unlikely(osd->od_mnt == NULL))
                return -EINPROGRESS;
 
         /* osd_lproc.c call this without env, allocate ksfs for that case */
@@ -1007,19 +962,21 @@ int osd_statfs(const struct lu_env *env, struct dt_device *d,
                 ksfs = &osd_oti_get(env)->oti_ksfs;
         }
 
-       cfs_spin_lock(&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;
-        cfs_spin_unlock(&osd->od_osfs_lock);
+       if (likely(result == 0))
+               *sfs = osd->od_statfs;
+       spin_unlock(&osd->od_osfs_lock);
 
         if (unlikely(env == NULL))
                 OBD_FREE_PTR(ksfs);
@@ -1027,6 +984,17 @@ int osd_statfs(const struct lu_env *env, struct dt_device *d,
         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.
  */
@@ -1039,9 +1007,20 @@ static void osd_conf_get(const struct lu_env *env,
         /*
          * XXX should be taken from not-yet-existing fs abstraction layer.
          */
+       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;
@@ -1057,25 +1036,12 @@ static void osd_conf_get(const struct lu_env *env,
 
 }
 
-/**
- * Helper function to get and fill the buffer with input values.
- */
-static struct lu_buf *osd_buf_get(const struct lu_env *env, void *area, ssize_t len)
-{
-        struct lu_buf *buf;
-
-        buf = &osd_oti_get(env)->oti_buf;
-        buf->lb_buf = area;
-        buf->lb_len = len;
-        return buf;
-}
-
 /*
  * Concurrency: shouldn't matter.
  */
 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)));
 }
 
@@ -1097,7 +1063,7 @@ 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));
 }
 
@@ -1107,14 +1073,31 @@ static int osd_commit_async(const struct lu_env *env,
 
 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;
+       struct super_block *sb = osd_sb(osd_dt_dev(d));
+       struct block_device *dev = sb->s_bdev;
+#ifdef HAVE_DEV_SET_RDONLY
+       struct block_device *jdev = LDISKFS_SB(sb)->journal_bdev;
+       int rc = 0;
+#else
+       int rc = -EOPNOTSUPP;
+#endif
+       ENTRY;
 
-        CERROR("*** setting device %s read-only ***\n", LUSTRE_OSD_NAME);
+#ifdef HAVE_DEV_SET_RDONLY
+       CERROR("*** setting %s read-only ***\n", osd_dt_dev(d)->od_svname);
 
-        rc = __lvfs_set_rdonly(sb->s_bdev, LDISKFS_SB(sb)->journal_bdev);
-        RETURN(rc);
+       if (jdev && (jdev != dev)) {
+               CDEBUG(D_IOCTL | D_HA, "set journal dev %lx rdonly\n",
+                      (long)jdev);
+               dev_set_rdonly(jdev);
+       }
+       CDEBUG(D_IOCTL | D_HA, "set dev %lx rdonly\n", (long)dev);
+       dev_set_rdonly(dev);
+#else
+       CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
+              osd_dt_dev(d)->od_svname, (long)dev, rc);
+#endif
+       RETURN(rc);
 }
 
 /*
@@ -1135,25 +1118,6 @@ 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.
  */
@@ -1221,7 +1185,6 @@ static const struct dt_device_operations osd_dt_ops = {
         .dt_ro             = osd_ro,
         .dt_commit_async   = osd_commit_async,
         .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,
@@ -1233,7 +1196,7 @@ 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++;
@@ -1248,7 +1211,7 @@ 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;
@@ -1265,7 +1228,7 @@ 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,
@@ -1280,7 +1243,7 @@ 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,
@@ -1319,14 +1282,14 @@ 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");
@@ -1411,7 +1374,8 @@ static void osd_inode_getattr(const struct lu_env *env,
 {
         attr->la_valid      |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
                                LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
-                               LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE;
+                               LA_FLAGS | LA_NLINK | LA_RDEV | LA_BLKSIZE |
+                              LA_TYPE;
 
         attr->la_atime      = LTIME_S(inode->i_atime);
         attr->la_mtime      = LTIME_S(inode->i_mtime);
@@ -1435,16 +1399,16 @@ static int osd_attr_get(const struct lu_env *env,
 {
         struct osd_object *obj = osd_dt_obj(dt);
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LINVRNT(osd_invariant(obj));
 
         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,
@@ -1452,35 +1416,139 @@ static int osd_declare_attr_set(const struct lu_env *env,
                                 const struct lu_attr *attr,
                                 struct thandle *handle)
 {
-        struct osd_thandle *oh;
-        struct osd_object *obj;
+       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);
+       LASSERT(dt != NULL);
+       LASSERT(handle != NULL);
 
-        obj = osd_dt_obj(dt);
-        LASSERT(osd_invariant(obj));
+       obj = osd_dt_obj(dt);
+       LASSERT(osd_invariant(obj));
 
-        oh = container_of0(handle, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle == NULL);
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, attr_set);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_ATTR_SET_BASE];
+       osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
+                            osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
 
-        if (attr && attr->la_valid & LA_UID) {
-                if (obj->oo_inode)
-                        osd_declare_qid(dt, oh, USRQUOTA, obj->oo_inode->i_uid,
-                                        obj->oo_inode);
-                osd_declare_qid(dt, oh, USRQUOTA, attr->la_uid, NULL);
-        }
-        if (attr && attr->la_valid & LA_GID) {
-                if (obj->oo_inode)
-                        osd_declare_qid(dt, oh, GRPQUOTA, obj->oo_inode->i_gid,
-                                        obj->oo_inode);
-                osd_declare_qid(dt, oh, GRPQUOTA, attr->la_gid, NULL);
-        }
+       if (attr == NULL || obj->oo_inode == NULL)
+               RETURN(rc);
 
-        return 0;
+       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,
@@ -1490,8 +1558,6 @@ static int osd_inode_setattr(const struct lu_env *env,
 
         bits = attr->la_valid;
 
-        LASSERT(!(bits & LA_TYPE)); /* Huh? You want too much. */
-
         if (bits & LA_ATIME)
                 inode->i_atime  = *osd_inode_time(env, inode, attr->la_atime);
         if (bits & LA_CTIME)
@@ -1517,7 +1583,7 @@ 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;
 
@@ -1566,49 +1632,52 @@ static int osd_attr_set(const struct lu_env *env,
         int rc;
 
         LASSERT(handle != NULL);
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(osd_invariant(obj));
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
                 return -EACCES;
 
-        OSD_EXEC_OP(handle, attr_set);
+       osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
+
+       if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING)) {
+               struct osd_thread_info  *oti  = osd_oti_get(env);
+               const struct lu_fid     *fid0 = lu_object_fid(&dt->do_lu);
+               struct lu_fid           *fid1 = &oti->oti_fid;
+               struct osd_inode_id     *id   = &oti->oti_id;
+               struct iam_path_descr   *ipd;
+               struct iam_container    *bag;
+               struct osd_thandle      *oh;
+               int                      rc;
+
+               fid_cpu_to_be(fid1, fid0);
+               memset(id, 1, sizeof(*id));
+               bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
+                                 fid0)->oi_dir.od_container;
+               ipd = osd_idx_ipd_get(env, bag);
+               if (unlikely(ipd == NULL))
+                       RETURN(-ENOMEM);
+
+               oh = container_of0(handle, struct osd_thandle, ot_super);
+               rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)fid1,
+                               (const struct iam_rec *)id, ipd);
+               osd_ipd_put(env, bag, ipd);
+               return(rc > 0 ? 0 : rc);
+       }
 
         inode = obj->oo_inode;
-       if (!osd_dt_dev(handle->th_dev)->od_is_md) {
-               /* OFD support */
-               rc = osd_quota_transfer(inode, attr);
-               if (rc)
-                       return rc;
-       } else {
-#ifdef HAVE_QUOTA_SUPPORT
-               if ((attr->la_valid & LA_UID && attr->la_uid != inode->i_uid) ||
-                   (attr->la_valid & 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 (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;
-                       osd_push_ctxt(env, save, 1);
-                       rc = ll_vfs_dq_transfer(inode, &iattr) ? -EDQUOT : 0;
-                       osd_pop_ctxt(save, 1);
-                       if (rc != 0)
-                               return rc;
-               }
-#endif
-       }
-        cfs_spin_lock(&obj->oo_guard);
-        rc = osd_inode_setattr(env, inode, attr);
-        cfs_spin_unlock(&obj->oo_guard);
+       ll_vfs_dq_init(inode);
+
+       rc = osd_quota_transfer(inode, attr);
+       if (rc)
+               return rc;
+
+       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);
+               ll_dirty_inode(inode, I_DIRTY_DATASYNC);
         return rc;
 }
 
@@ -1629,9 +1698,6 @@ static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
         struct osd_thandle *oth;
         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);
@@ -1649,22 +1715,19 @@ static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
         if (hint && hint->dah_parent)
                 parent = hint->dah_parent;
 
-#ifdef HAVE_QUOTA_SUPPORT
-       osd_push_ctxt(info->oti_env, save, osd_dt_dev(th->th_dev)->od_is_md);
-#endif
         inode = ldiskfs_create_inode(oth->ot_handle,
                                      parent ? osd_dt_obj(parent)->oo_inode :
                                               osd_sb(osd)->s_root->d_inode,
                                      mode);
-#ifdef HAVE_QUOTA_SUPPORT
-       osd_pop_ctxt(save, osd_dt_dev(th->th_dev)->od_is_md);
-#endif
         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;
+
+               /* For new created object, it must be consistent,
+                * and it is unnecessary to scrub against it. */
+               ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
                 obj->oo_inode = inode;
                 result = 0;
         } else {
@@ -1690,7 +1753,6 @@ 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));
@@ -1698,16 +1760,7 @@ 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;
 }
 
@@ -1791,7 +1844,8 @@ static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
                 * This inode should be marked dirty for i_rdev.  Currently
                 * that is done in the osd_attr_init().
                 */
-                init_special_inode(obj->oo_inode, mode, attr->la_rdev);
+               init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
+                                  attr->la_rdev);
         }
         LINVRNT(osd_invariant(obj));
         return result;
@@ -1833,7 +1887,8 @@ 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);
 
@@ -1860,16 +1915,9 @@ static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
         if ((valid & LA_MTIME) && (attr->la_mtime == LTIME_S(inode->i_mtime)))
                 attr->la_valid &= ~LA_MTIME;
 
-       if (!osd_obj2dev(obj)->od_is_md) {
-               /* OFD support */
-               result = osd_quota_transfer(inode, attr);
-               if (result)
-                       return;
-       } else {
-#ifdef HAVE_QUOTA_SUPPORT
-               attr->la_valid &= ~(LA_UID | LA_GID);
-#endif
-       }
+       result = osd_quota_transfer(inode, attr);
+       if (result)
+               return;
 
         if (attr->la_valid != 0) {
                 result = osd_inode_setattr(info->oti_env, inode, attr);
@@ -1881,7 +1929,7 @@ static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
                  * enabled on ldiskfs (lquota takes care of it).
                  */
                 LASSERTF(result == 0, "%d", result);
-                inode->i_sb->s_op->dirty_inode(inode);
+               ll_dirty_inode(inode, I_DIRTY_DATASYNC);
         }
 
         attr->la_valid = valid;
@@ -1918,7 +1966,7 @@ static int __osd_object_create(struct osd_thread_info *info,
        /* restore previous umask value */
        current->fs->umask = umask;
 
-        return result;
+       return result;
 }
 
 /**
@@ -1935,53 +1983,100 @@ static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
 
         LASSERT(obj->oo_inode != NULL);
 
-       if (osd->od_is_md) {
-               struct md_ucred *uc = md_ucred(env);
-               LASSERT(uc != NULL);
-       }
-
        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)
+int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
+                  const struct lu_fid *fid, struct lu_seq_range *range)
 {
-        struct osd_thandle *oh;
+       struct seq_server_site  *ss = osd_seq_site(osd);
+       int                     rc;
 
-        LASSERT(handle != NULL);
+       if (fid_is_idif(fid)) {
+               range->lsr_flags = LU_SEQ_RANGE_OST;
+               range->lsr_index = fid_idif_ost_idx(fid);
+               return 0;
+       }
 
-        oh = container_of0(handle, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle == NULL);
+       if (!fid_seq_in_fldb(fid_seq(fid))) {
+               range->lsr_flags = LU_SEQ_RANGE_MDT;
+               if (ss != NULL)
+                       /* FIXME: If ss is NULL, it suppose not get lsr_index
+                        * at all */
+                       range->lsr_index = ss->ss_node_id;
+               return 0;
+       }
 
-        OSD_DECLARE_OP(oh, create);
-        oh->ot_credits += 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))) {
-                OSD_DECLARE_OP(oh, insert);
-                oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
-        }
-        /* 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_DECLARE_OP(oh, insert);
-                oh->ot_credits += osd_dto_credits_noquota[DTO_WRITE_BASE];
-        }
+       LASSERT(ss != NULL);
+       range->lsr_flags = -1;
+       rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(fid), range);
+       if (rc != 0) {
+               CERROR("%s can not find "DFID": rc = %d\n",
+                      osd_name(osd), PFID(fid), rc);
+       }
+       return rc;
+}
 
-        if (attr) {
-                osd_declare_qid(dt, oh, USRQUOTA, attr->la_uid, NULL);
-                osd_declare_qid(dt, oh, GRPQUOTA, attr->la_gid, NULL);
-        }
-        return 0;
+/*
+ * Concurrency: no external locking is necessary.
+ */
+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 lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
+       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_trans_declare_op(env, oh, OSD_OT_CREATE,
+                            osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
+       if (!fid_is_on_ost(osd_oti_get(env), osd_dt_dev(handle->th_dev),
+                          lu_object_fid(&dt->do_lu)))
+               /* Reuse idle OI block may cause additional one OI block
+                * to be changed. */
+               osd_trans_declare_op(env, oh, OSD_OT_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_trans_declare_op(env, oh, OSD_OT_INSERT,
+                                    osd_dto_credits_noquota[DTO_WRITE_BASE]);
+               osd_trans_declare_op(env, oh, OSD_OT_INSERT, 0);
+       }
+
+       if (!attr)
+               RETURN(0);
+
+       rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid, 1, oh,
+                                  false, false, NULL, false);
+       if (rc != 0)
+               RETURN(rc);
+
+       /* It does fld look up inside declare, and the result will be
+        * added to fld cache, so the following fld lookup inside insert
+        * does not need send RPC anymore, so avoid send rpc with holding
+        * transaction */
+       if (fid_is_norm(lu_object_fid(&dt->do_lu)) &&
+               !fid_is_last_id(lu_object_fid(&dt->do_lu)))
+               osd_fld_lookup(env, osd_dt_dev(handle->th_dev),
+                              lu_object_fid(&dt->do_lu), range);
+
+
+       RETURN(rc);
 }
 
 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
@@ -1998,7 +2093,7 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
         ENTRY;
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(!dt_object_exists(dt));
+       LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
@@ -2007,13 +2102,16 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
                 * 'tune2fs -O quota' will take care of creating them */
                RETURN(-EPERM);
 
-        OSD_EXEC_OP(th, create);
+       osd_trans_exec_op(env, th, OSD_OT_CREATE);
+       osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
 
         result = __osd_object_create(info, obj, attr, hint, dof, th);
         if (result == 0)
                 result = __osd_oi_insert(env, obj, fid, th);
 
-        LASSERT(ergo(result == 0, dt_object_exists(dt)));
+       LASSERT(ergo(result == 0,
+                    dt_object_exists(dt) && !dt_object_remote(dt)));
+
         LASSERT(osd_invariant(obj));
         RETURN(result);
 }
@@ -2024,28 +2122,35 @@ static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
  * Concurrency: must be locked
  */
 static int osd_declare_object_destroy(const struct lu_env *env,
-                                      struct dt_object *dt,
-                                      struct thandle *th)
+                                     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;
-
-        ENTRY;
-
-        oh = container_of0(th, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle == NULL);
-        LASSERT(inode);
-
-        OSD_DECLARE_OP(oh, destroy);
-        OSD_DECLARE_OP(oh, delete);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_OBJECT_DELETE];
-        oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
-
-        osd_declare_qid(dt, oh, USRQUOTA, inode->i_uid, inode);
-        osd_declare_qid(dt, oh, GRPQUOTA, inode->i_gid, inode);
+       struct osd_object  *obj = osd_dt_obj(dt);
+       struct inode       *inode = obj->oo_inode;
+       struct osd_thandle *oh;
+       int                 rc;
+       ENTRY;
 
-        RETURN(0);
+       oh = container_of0(th, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
+       LASSERT(inode);
+
+       osd_trans_declare_op(env, oh, OSD_OT_DELETE,
+                            osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
+       /* Recycle idle OI leaf may cause additional three OI blocks
+        * to be changed. */
+       osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
+                            osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
+
+       /* 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,
@@ -2070,22 +2175,27 @@ static int osd_object_destroy(const struct lu_env *env,
 
        /* Parallel control for OI scrub. For most of cases, there is no
         * lock contention. So it will not affect unlink performance. */
-       cfs_mutex_lock(&inode->i_mutex);
-        if (S_ISDIR(inode->i_mode)) {
-                LASSERT(osd_inode_unlinked(inode) ||
-                        inode->i_nlink == 1);
-                cfs_spin_lock(&obj->oo_guard);
-                inode->i_nlink = 0;
-                cfs_spin_unlock(&obj->oo_guard);
-                inode->i_sb->s_op->dirty_inode(inode);
-        } else {
-                LASSERT(osd_inode_unlinked(inode));
-        }
+       mutex_lock(&inode->i_mutex);
+       if (S_ISDIR(inode->i_mode)) {
+               LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1);
+               /* it will check/delete the agent inode for every dir
+                * destory, how to optimize it? unlink performance
+                * impaction XXX */
+               result = osd_delete_from_agent(env, osd, obj, oh);
+               if (result != 0 && result != -ENOENT) {
+                       CERROR("%s: delete agent inode "DFID": rc = %d\n",
+                              osd_name(osd), PFID(fid), result);
+               }
+               spin_lock(&obj->oo_guard);
+               clear_nlink(inode);
+               spin_unlock(&obj->oo_guard);
+               ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+       }
 
-        OSD_EXEC_OP(th, destroy);
+       osd_trans_exec_op(env, th, OSD_OT_DESTROY);
 
         result = osd_oi_delete(osd_oti_get(env), osd, fid, th);
-       cfs_mutex_unlock(&inode->i_mutex);
+       mutex_unlock(&inode->i_mutex);
 
         /* XXX: add to ext3 orphan list */
         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
@@ -2096,32 +2206,15 @@ static int osd_object_destroy(const struct lu_env *env,
         RETURN(0);
 }
 
-/**
- * Helper function for osd_xattr_set()
- */
-static int __osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
-                           const struct lu_buf *buf, const char *name, int fl)
-{
-        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_child_dentry;
-        int                     fs_flags = 0;
-        int                     rc;
-
-        LASSERT(dt_object_exists(dt));
-        LASSERT(inode->i_op != NULL && inode->i_op->setxattr != NULL);
-
-        if (fl & LU_XATTR_REPLACE)
-                fs_flags |= XATTR_REPLACE;
-
-        if (fl & LU_XATTR_CREATE)
-                fs_flags |= XATTR_CREATE;
+static inline int __osd_xattr_set(struct osd_thread_info *info,
+                                 struct inode *inode, const char *name,
+                                 const void *buf, int buflen, int fl)
+{
+       struct dentry *dentry = &info->oti_child_dentry;
 
-        dentry->d_inode = inode;
-        rc = inode->i_op->setxattr(dentry, name, buf->lb_buf,
-                                   buf->lb_len, fs_flags);
-        return rc;
+       ll_vfs_dq_init(inode);
+       dentry->d_inode = inode;
+       return inode->i_op->setxattr(dentry, name, buf, buflen, fl);
 }
 
 /**
@@ -2134,18 +2227,27 @@ static int __osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
  *
  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
  */
-static int osd_ea_fid_set(const struct lu_env *env, struct dt_object *dt,
-                          const struct lu_fid *fid)
+int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
+                  const struct lu_fid *fid)
 {
-        struct osd_thread_info  *info      = osd_oti_get(env);
-        struct lustre_mdt_attrs *mdt_attrs = &info->oti_mdt_attrs;
+       struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
+       int                      rc;
 
-        lustre_lma_init(mdt_attrs, fid);
-        lustre_lma_swab(mdt_attrs);
-        return __osd_xattr_set(env, dt,
-                               osd_buf_get(env, mdt_attrs, sizeof *mdt_attrs),
-                               XATTR_NAME_LMA, LU_XATTR_CREATE);
+       if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
+               return 0;
 
+       if (OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF) && fid_is_client_visible(fid))
+               return 0;
+
+       lustre_lma_init(lma, fid);
+       lustre_lma_swab(lma);
+
+       rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
+                            XATTR_CREATE);
+       /* Someone may created the EA by race. */
+       if (unlikely(rc == -EEXIST))
+               rc = 0;
+       return rc;
 }
 
 /**
@@ -2157,18 +2259,20 @@ static int osd_ea_fid_set(const struct lu_env *env, struct dt_object *dt,
  * its inmemory API.
  */
 void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
-                                  const struct dt_rec *fid)
+                                 const struct dt_rec *fid)
 {
-        param->edp_magic = LDISKFS_LUFID_MAGIC;
-        param->edp_len =  sizeof(struct lu_fid) + 1;
+       if (!fid_is_client_mdt_visible((const struct lu_fid *)fid)) {
+               param->edp_magic = 0;
+               return;
+       }
 
-        fid_cpu_to_be((struct lu_fid *)param->edp_data,
-                      (struct lu_fid *)fid);
+       param->edp_magic = LDISKFS_LUFID_MAGIC;
+       param->edp_len =  sizeof(struct lu_fid) + 1;
+       fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
 }
 
 /**
- * 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
+ * Try to read the fid from inode ea into dt_rec.
  *
  * \param fid object fid.
  *
@@ -2191,6 +2295,95 @@ static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
        RETURN(0);
 }
 
+static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
+                                       struct inode *dir,
+                                       struct inode  *parent_dir,
+                                       const struct dt_rec *dot_fid,
+                                       const struct dt_rec *dot_dot_fid,
+                                       struct osd_thandle *oth)
+{
+       struct ldiskfs_dentry_param *dot_ldp;
+       struct ldiskfs_dentry_param *dot_dot_ldp;
+
+       dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
+       osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
+
+       dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
+       dot_ldp->edp_magic = 0;
+       return ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
+                                       dir, dot_ldp, dot_dot_ldp);
+}
+
+/**
+ * Create an local inode for remote entry
+ */
+static struct inode *osd_create_remote_inode(const struct lu_env *env,
+                                            struct osd_device *osd,
+                                            struct osd_object *pobj,
+                                            const struct lu_fid *fid,
+                                            struct thandle *th)
+{
+       struct osd_thread_info  *info = osd_oti_get(env);
+       struct inode            *local;
+       struct osd_thandle      *oh;
+       int                     rc;
+       ENTRY;
+
+       LASSERT(th);
+       oh = container_of(th, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle->h_transaction != NULL);
+
+       /* FIXME: Insert index api needs to know the mode of
+        * the remote object. Just use S_IFDIR for now */
+       local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode, S_IFDIR);
+       if (IS_ERR(local)) {
+               CERROR("%s: create local error %d\n", osd_name(osd),
+                      (int)PTR_ERR(local));
+               RETURN(local);
+       }
+
+       rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
+               (const struct dt_rec *)lu_object_fid(&pobj->oo_dt.do_lu),
+               (const struct dt_rec *)fid, oh);
+       if (rc != 0) {
+               CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
+                       osd_name(osd), PFID(fid), rc);
+               RETURN(ERR_PTR(rc));
+       }
+
+       RETURN(local);
+}
+
+/**
+ * Delete local inode for remote entry
+ */
+static int osd_delete_remote_inode(const struct lu_env *env,
+                                  struct osd_device *osd,
+                                  const struct lu_fid *fid,
+                                   __u32 ino, struct osd_thandle *oh)
+{
+       struct osd_thread_info  *oti = osd_oti_get(env);
+       struct osd_inode_id     *id = &oti->oti_id;
+       struct inode            *inode;
+       ENTRY;
+
+       id->oii_ino = le32_to_cpu(ino);
+       id->oii_gen = OSD_OII_NOGEN;
+       inode = osd_iget(oti, osd, id);
+       if (IS_ERR(inode)) {
+               CERROR("%s: iget error "DFID" id %u:%u\n", osd_name(osd),
+                      PFID(fid), id->oii_ino, id->oii_gen);
+               RETURN(PTR_ERR(inode));
+       }
+
+       clear_nlink(inode);
+       mark_inode_dirty(inode);
+       CDEBUG(D_INODE, "%s: delete remote inode "DFID" %lu\n",
+               osd_name(osd), PFID(fid), inode->i_ino);
+       iput(inode);
+       RETURN(0);
+}
+
 /**
  * OSD layer object create function for interoperability mode (b11826).
  * This is mostly similar to osd_object_create(). Only difference being, fid is
@@ -2213,7 +2406,7 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
         ENTRY;
 
         LASSERT(osd_invariant(obj));
-        LASSERT(!dt_object_exists(dt));
+       LASSERT(!dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
@@ -2222,17 +2415,20 @@ static int osd_object_ea_create(const struct lu_env *env, struct dt_object *dt,
                 * 'tune2fs -O quota' will take care of creating them */
                RETURN(-EPERM);
 
-        OSD_EXEC_OP(th, create);
+       osd_trans_exec_op(env, th, OSD_OT_CREATE);
+       osd_trans_declare_rb(env, th, OSD_OT_REF_ADD);
 
         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);
+       if ((result == 0) &&
+           (fid_is_last_id(fid) ||
+            !fid_is_on_ost(info, osd_dt_dev(th->th_dev), fid)))
+               result = osd_ea_fid_set(info, obj->oo_inode, fid);
 
         if (result == 0)
                 result = __osd_oi_insert(env, obj, fid, th);
 
-        LASSERT(ergo(result == 0, dt_object_exists(dt)));
+       LASSERT(ergo(result == 0,
+                    dt_object_exists(dt) && !dt_object_remote(dt)));
         LINVRNT(osd_invariant(obj));
         RETURN(result);
 }
@@ -2241,7 +2437,7 @@ static int osd_declare_object_ref_add(const struct lu_env *env,
                                       struct dt_object *dt,
                                       struct thandle *handle)
 {
-        struct osd_thandle *oh;
+       struct osd_thandle       *oh;
 
         /* it's possible that object doesn't exist yet */
         LASSERT(handle != NULL);
@@ -2249,10 +2445,10 @@ static int osd_declare_object_ref_add(const struct lu_env *env,
         oh = container_of0(handle, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, ref_add);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_ATTR_SET_BASE];
+       osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
+                            osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
 
-        return 0;
+       return 0;
 }
 
 /*
@@ -2265,35 +2461,39 @@ static int osd_object_ref_add(const struct lu_env *env,
         struct inode      *inode = obj->oo_inode;
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
-        OSD_EXEC_OP(th, ref_add);
+       osd_trans_exec_op(env, th, OSD_OT_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.
-         */
-        cfs_spin_lock(&obj->oo_guard);
-        inode->i_nlink++;
-        if (S_ISDIR(inode->i_mode) && inode->i_nlink > 1) {
-                if (inode->i_nlink >= LDISKFS_LINK_MAX ||
-                    inode->i_nlink == 2)
-                        inode->i_nlink = 1;
-        }
-        LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
-        cfs_spin_unlock(&obj->oo_guard);
-        inode->i_sb->s_op->dirty_inode(inode);
-        LINVRNT(osd_invariant(obj));
+       /*
+        * 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);
+       ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+       LINVRNT(osd_invariant(obj));
 
-        return 0;
+       return 0;
 }
 
 static int osd_declare_object_ref_del(const struct lu_env *env,
@@ -2302,16 +2502,16 @@ static int osd_declare_object_ref_del(const struct lu_env *env,
 {
         struct osd_thandle *oh;
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(handle != NULL);
 
         oh = container_of0(handle, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, ref_del);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_ATTR_SET_BASE];
+       osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
+                            osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
 
-        return 0;
+       return 0;
 }
 
 /*
@@ -2324,25 +2524,25 @@ static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
         struct inode      *inode = obj->oo_inode;
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(osd_write_locked(env, obj));
         LASSERT(th != NULL);
 
-        OSD_EXEC_OP(th, ref_del);
-
-        cfs_spin_lock(&obj->oo_guard);
-        LASSERT(inode->i_nlink > 0);
-        inode->i_nlink--;
-        /* 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)
-                inode->i_nlink++;
-        cfs_spin_unlock(&obj->oo_guard);
-        inode->i_sb->s_op->dirty_inode(inode);
-        LINVRNT(osd_invariant(obj));
+       osd_trans_exec_op(env, th, OSD_OT_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);
+       ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+       LINVRNT(osd_invariant(obj));
 
-        return 0;
+       return 0;
 }
 
 /*
@@ -2380,15 +2580,13 @@ static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
                 return sizeof(dt_obj_version_t);
         }
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(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;
 
-        dentry->d_inode = inode;
-        return inode->i_op->getxattr(dentry, name, buf->lb_buf, buf->lb_len);
+       return __osd_xattr_get(inode, dentry, name, buf->lb_buf, buf->lb_len);
 }
 
 
@@ -2397,22 +2595,19 @@ static int osd_declare_xattr_set(const struct lu_env *env,
                                  const struct lu_buf *buf, const char *name,
                                  int fl, struct thandle *handle)
 {
-        struct osd_thandle *oh;
+       struct osd_thandle *oh;
 
-        LASSERT(handle != NULL);
+       LASSERT(handle != NULL);
 
-        if (strcmp(name, XATTR_NAME_VERSION) == 0) {
-                /* no credits for version */
-                return 0;
-        }
-
-        oh = container_of0(handle, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle == NULL);
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, xattr_set);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_XATTR_SET];
+       osd_trans_declare_op(env, oh, OSD_OT_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;
+       return 0;
 }
 
 /*
@@ -2430,7 +2625,7 @@ static void osd_object_version_set(const struct lu_env *env,
         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);
+       ll_dirty_inode(inode, I_DIRTY_DATASYNC);
 }
 
 /*
@@ -2440,6 +2635,12 @@ static int osd_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 lustre_capa *capa)
 {
+       struct osd_object      *obj      = osd_dt_obj(dt);
+       struct inode           *inode    = obj->oo_inode;
+       struct osd_thread_info *info     = osd_oti_get(env);
+       int                     fs_flags = 0;
+       ENTRY;
+
         LASSERT(handle != NULL);
 
         /* version set is not real XATTR */
@@ -2454,8 +2655,15 @@ static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
         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);
+       osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
+       if (fl & LU_XATTR_REPLACE)
+               fs_flags |= XATTR_REPLACE;
+
+       if (fl & LU_XATTR_CREATE)
+               fs_flags |= XATTR_CREATE;
+
+       return __osd_xattr_set(info, inode, name, buf->lb_buf, buf->lb_len,
+                              fs_flags);
 }
 
 /*
@@ -2469,7 +2677,7 @@ static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
         struct osd_thread_info *info   = osd_oti_get(env);
         struct dentry          *dentry = &info->oti_obj_dentry;
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(inode->i_op != NULL && inode->i_op->listxattr != NULL);
         LASSERT(osd_read_locked(env, obj) || osd_write_locked(env, obj));
 
@@ -2486,16 +2694,16 @@ static int osd_declare_xattr_del(const struct lu_env *env,
 {
         struct osd_thandle *oh;
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(handle != NULL);
 
         oh = container_of0(handle, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, xattr_set);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_XATTR_SET];
+       osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
+                            osd_dto_credits_noquota[DTO_XATTR_SET]);
 
-        return 0;
+       return 0;
 }
 
 /*
@@ -2511,16 +2719,16 @@ static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
         struct dentry          *dentry = &info->oti_obj_dentry;
         int                     rc;
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(inode->i_op != NULL && inode->i_op->removexattr != NULL);
-        LASSERT(osd_write_locked(env, obj));
         LASSERT(handle != NULL);
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_META_WRITE))
                 return -EACCES;
 
-        OSD_EXEC_OP(handle, xattr_set);
+       osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
 
+       ll_vfs_dq_init(inode);
         dentry->d_inode = inode;
         rc = inode->i_op->removexattr(dentry, name);
         return rc;
@@ -2545,7 +2753,7 @@ static struct obd_capa *osd_capa_get(const struct lu_env *env,
         if (!dev->od_fl_capa)
                 RETURN(ERR_PTR(-ENOENT));
 
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LINVRNT(osd_invariant(obj));
 
         /* renewal sanity check */
@@ -2596,9 +2804,9 @@ 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;
@@ -2628,9 +2836,13 @@ static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
        file->f_dentry = dentry;
        file->f_mapping = inode->i_mapping;
        file->f_op = inode->i_fop;
+#ifndef HAVE_FILE_FSYNC_4ARGS
        mutex_lock(&inode->i_mutex);
-       rc = file->f_op->fsync(file, dentry, 0);
+#endif
+       rc = do_fsync(file, 0);
+#ifndef HAVE_FILE_FSYNC_4ARGS
        mutex_unlock(&inode->i_mutex);
+#endif
        RETURN(rc);
 }
 
@@ -2690,17 +2902,6 @@ static int osd_iam_container_init(const struct lu_env *env,
                 return result;
 
         result = iam_container_setup(bag);
-        if (result != 0)
-                goto out;
-
-        if (osd_obj2dev(obj)->od_iop_mode) {
-                u32 ptr = bag->ic_descr->id_ops->id_root_ptr(bag);
-
-                bag->ic_root_bh = ldiskfs_bread(NULL, obj->oo_inode,
-                                                ptr, 0, &result);
-        }
-
- out:
         if (result == 0)
                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
         else
@@ -2719,17 +2920,15 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
        int                      result;
        int                      skip_iam = 0;
        struct osd_object       *obj = osd_dt_obj(dt);
-       struct osd_device       *osd = osd_obj2dev(obj);
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(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))
+               if (obj->oo_inode != NULL && S_ISDIR(obj->oo_inode->i_mode))
                         result = 0;
                 else
                         result = -ENOTDIR;
@@ -2737,7 +2936,7 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
        } else if (unlikely(feat == &dt_otable_features)) {
                dt->do_index_ops = &osd_otable_ops;
                return 0;
-       } else if (feat == &dt_acct_features) {
+       } else if (unlikely(feat == &dt_acct_features)) {
                dt->do_index_ops = &osd_acct_index_ops;
                result = 0;
                skip_iam = 1;
@@ -2747,28 +2946,28 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
                 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);
+                       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;
                 }
@@ -2782,6 +2981,10 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
         }
         LINVRNT(osd_invariant(obj));
 
+       if (result == 0 && is_quota_glb_feat(feat) &&
+           fid_seq(lu_object_fid(&dt->do_lu)) == FID_SEQ_QUOTA_GLB)
+               result = osd_quota_migration(env, dt, feat);
+
         return result;
 }
 
@@ -2873,10 +3076,10 @@ static int osd_index_declare_iam_delete(const struct lu_env *env,
         oh = container_of0(handle, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, delete);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
+       osd_trans_declare_op(env, oh, OSD_OT_DELETE,
+                            osd_dto_credits_noquota[DTO_INDEX_DELETE]);
 
-        return 0;
+       return 0;
 }
 
 /**
@@ -2896,23 +3099,24 @@ static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
                                 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;
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(bag->ic_object == obj->oo_inode);
         LASSERT(handle != NULL);
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_DELETE))
                 RETURN(-EACCES);
 
-        OSD_EXEC_OP(handle, delete);
+       osd_trans_exec_op(env, handle, OSD_OT_DELETE);
 
         ipd = osd_idx_ipd_get(env, bag);
         if (unlikely(ipd == NULL))
@@ -2922,6 +3126,12 @@ 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));
@@ -2929,28 +3139,30 @@ static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
 }
 
 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 dt_object *dt,
+                                      const struct dt_key *key,
+                                      struct thandle *handle)
 {
-        struct osd_thandle *oh;
+       struct osd_thandle *oh;
+       struct inode       *inode;
+       int                 rc;
+       ENTRY;
 
-        LASSERT(dt_object_exists(dt));
-        LASSERT(handle != NULL);
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
+       LASSERT(handle != NULL);
 
-        oh = container_of0(handle, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle == NULL);
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, delete);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
+       osd_trans_declare_op(env, oh, OSD_OT_DELETE,
+                            osd_dto_credits_noquota[DTO_INDEX_DELETE]);
 
-        LASSERT(osd_dt_obj(dt)->oo_inode);
-        osd_declare_qid(dt, oh, USRQUOTA, osd_dt_obj(dt)->oo_inode->i_uid,
-                        osd_dt_obj(dt)->oo_inode);
-        osd_declare_qid(dt, oh, GRPQUOTA, osd_dt_obj(dt)->oo_inode->i_gid,
-                        osd_dt_obj(dt)->oo_inode);
+       inode = osd_dt_obj(dt)->oo_inode;
+       LASSERT(inode);
 
-        return 0;
+       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,
@@ -2963,7 +3175,29 @@ static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
                 rec = (struct osd_fid_pack *) (de->name + de->name_len + 1);
                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
         }
-        RETURN(rc);
+       return rc;
+}
+
+static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
+                         struct lu_fid *fid)
+{
+       struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
+       struct seq_server_site  *ss = osd_seq_site(osd);
+       int                     rc;
+       ENTRY;
+
+       /* Those FID seqs, which are not in FLDB, must be local seq */
+       if (unlikely(!fid_seq_in_fldb(fid_seq(fid)) || ss == NULL))
+               RETURN(0);
+
+       rc = osd_fld_lookup(env, osd, fid, range);
+       if (rc != 0) {
+               CERROR("%s: Can not lookup fld for "DFID"\n",
+                      osd_name(osd), PFID(fid));
+               RETURN(rc);
+       }
+
+       RETURN(ss->ss_node_id != range->lsr_index);
 }
 
 /**
@@ -2985,18 +3219,19 @@ static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
         struct inode               *dir    = obj->oo_inode;
         struct dentry              *dentry;
         struct osd_thandle         *oh;
-        struct ldiskfs_dir_entry_2 *de;
+       struct ldiskfs_dir_entry_2 *de = NULL;
         struct buffer_head         *bh;
         struct htree_lock          *hlock = NULL;
-        int                         rc;
-
+       struct lu_fid              *fid = &osd_oti_get(env)->oti_fid;
+       struct osd_device          *osd = osd_dev(dt->do_lu.lo_dev);
+       int                        rc;
         ENTRY;
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(handle != NULL);
 
-        OSD_EXEC_OP(handle, delete);
+       osd_trans_exec_op(env, handle, OSD_OT_DELETE);
 
         oh = container_of(handle, struct osd_thandle, ot_super);
         LASSERT(oh->ot_handle != NULL);
@@ -3005,6 +3240,7 @@ 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));
 
@@ -3013,7 +3249,7 @@ static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
                                    dir, LDISKFS_HLOCK_DEL);
         } else {
-                cfs_down_write(&obj->oo_ext_idx_sem);
+               down_write(&obj->oo_ext_idx_sem);
         }
 
         bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
@@ -3027,7 +3263,31 @@ static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
         if (hlock != NULL)
                 ldiskfs_htree_unlock(hlock);
         else
-                cfs_up_write(&obj->oo_ext_idx_sem);
+               up_write(&obj->oo_ext_idx_sem);
+
+       if (rc != 0)
+               GOTO(out, rc);
+
+       /* For inode on the remote MDT, .. will point to
+        * /Agent directory. So do not try to lookup/delete
+        * remote inode for .. */
+       if (strcmp((char *)key, dotdot) == 0)
+               GOTO(out, rc = 0);
+
+       LASSERT(de != NULL);
+       rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
+       if (rc == 0 && osd_remote_fid(env, osd, fid)) {
+               __u32 ino = le32_to_cpu(de->inode);
+
+               rc = osd_delete_remote_inode(env, osd, fid, ino, oh);
+               if (rc != 0)
+                       CERROR("%s: del local inode "DFID": rc = %d\n",
+                               osd_name(osd), PFID(fid), rc);
+       } else {
+               if (rc == -ENODATA)
+                       rc = 0;
+       }
+out:
 
         LASSERT(osd_invariant(obj));
         RETURN(rc);
@@ -3059,7 +3319,7 @@ static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
         ENTRY;
 
         LASSERT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(bag->ic_object == obj->oo_inode);
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_LOOKUP))
@@ -3072,6 +3332,12 @@ 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))
@@ -3080,10 +3346,14 @@ 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);
@@ -3101,16 +3371,15 @@ static int osd_index_declare_iam_insert(const struct lu_env *env,
 {
         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);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
+       osd_trans_declare_op(env, oh, OSD_OT_INSERT,
+                            osd_dto_credits_noquota[DTO_INDEX_INSERT]);
 
-        return 0;
+       return 0;
 }
 
 /**
@@ -3133,24 +3402,21 @@ static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *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;
+        struct iam_rec         *iam_rec;
         int                     rc;
 
         ENTRY;
 
         LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(bag->ic_object == obj->oo_inode);
         LASSERT(th != NULL);
 
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
                RETURN(-EACCES);
 
-        OSD_EXEC_OP(th, insert);
+       osd_trans_exec_op(env, th, OSD_OT_INSERT);
 
         ipd = osd_idx_ipd_get(env, bag);
         if (unlikely(ipd == NULL))
@@ -3159,21 +3425,22 @@ 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);
@@ -3200,25 +3467,20 @@ static int __osd_ea_add_rec(struct osd_thread_info *info,
         oth = container_of(th, struct osd_thandle, ot_super);
         LASSERT(oth->ot_handle != NULL);
         LASSERT(oth->ot_handle->h_transaction != NULL);
+       LASSERT(pobj->oo_inode);
 
-        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_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 = NULL;
-        }
-        rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
+       ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
+       if (unlikely(pobj->oo_inode ==
+                    osd_sb(osd_obj2dev(pobj))->s_root->d_inode))
+               ldp->edp_magic = 0;
+       else
+               osd_get_ldiskfs_dirent_param(ldp, fid);
+       child = osd_child_dentry_get(info->oti_env, pobj, name, strlen(name));
+       child->d_fsdata = (void *)ldp;
+       ll_vfs_dq_init(pobj->oo_inode);
+       rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
 
-        RETURN(rc);
+       RETURN(rc);
 }
 
 /**
@@ -3241,8 +3503,6 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
                               struct thandle *th)
 {
         struct inode                *inode = dir->oo_inode;
-        struct ldiskfs_dentry_param *dot_ldp;
-        struct ldiskfs_dentry_param *dot_dot_ldp;
         struct osd_thandle          *oth;
         int result = 0;
 
@@ -3258,32 +3518,23 @@ static int osd_add_dot_dotdot(struct osd_thread_info *info,
                         dir->oo_compat_dot_created = 1;
                         result = 0;
                 }
-        } else if(strcmp(name, dotdot) == 0) {
-                dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
-                dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
-
-                if (!dir->oo_compat_dot_created)
-                        return -EINVAL;
-                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 {
-                        dot_ldp = NULL;
-                        dot_dot_ldp = NULL;
-                }
-                /* 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, NULL, th);
-                }
+       } else if (strcmp(name, dotdot) == 0) {
+               if (!dir->oo_compat_dot_created)
+                       return -EINVAL;
+               /* 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, NULL, th);
+               }
 
-                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;
-        }
+               result = osd_add_dot_dotdot_internal(info, dir->oo_inode,
+                                               parent_dir, dot_fid,
+                                               dot_dot_fid, oth);
+               if (result == 0)
+                       dir->oo_compat_dotdot_created = 1;
+       }
 
-        return result;
+       return result;
 }
 
 
@@ -3307,7 +3558,7 @@ static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
                                            pobj->oo_inode, 0);
                 } else {
-                        cfs_down_write(&pobj->oo_ext_idx_sem);
+                       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),
@@ -3317,21 +3568,31 @@ static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
                 } else {
-                        cfs_down_write(&pobj->oo_ext_idx_sem);
+                       down_write(&pobj->oo_ext_idx_sem);
                 }
 
-                rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
-                                      hlock, th);
+               if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
+                       struct lu_fid *tfid = &info->oti_fid;
+
+                       *tfid = *(const struct lu_fid *)fid;
+                       tfid->f_ver = ~0;
+                       rc = __osd_ea_add_rec(info, pobj, cinode, name,
+                                             (const struct dt_rec *)tfid,
+                                             hlock, th);
+               } else {
+                       rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
+                                             hlock, th);
+               }
         }
         if (hlock != NULL)
                 ldiskfs_htree_unlock(hlock);
         else
-                cfs_up_write(&pobj->oo_ext_idx_sem);
+               up_write(&pobj->oo_ext_idx_sem);
 
         return rc;
 }
 
-static int
+static void
 osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
                      struct osd_idmap_cache *oic)
 {
@@ -3342,13 +3603,16 @@ osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
        int                  rc;
        ENTRY;
 
+       if (!fid_is_norm(fid) && !fid_is_igif(fid))
+               RETURN_EXIT;
+
 again:
-       rc = osd_oi_lookup(oti, dev, fid, id);
+       rc = osd_oi_lookup(oti, dev, fid, id, true);
        if (rc != 0 && rc != -ENOENT)
-               RETURN(rc);
+               RETURN_EXIT;
 
        if (rc == 0 && osd_id_eq(id, &oic->oic_lid))
-               RETURN(0);
+               RETURN_EXIT;
 
        if (thread_is_running(&scrub->os_thread)) {
                rc = osd_oii_insert(dev, oic, rc == -ENOENT);
@@ -3359,10 +3623,10 @@ again:
                if (unlikely(rc == -EAGAIN))
                        goto again;
 
-               RETURN(rc);
+               RETURN_EXIT;
        }
 
-       if (!scrub->os_no_scrub && ++once == 1) {
+       if (!dev->od_noscrub && ++once == 1) {
                CDEBUG(D_LFSCK, "Trigger OI scrub by RPC for "DFID"\n",
                       PFID(fid));
                rc = osd_scrub_start(dev);
@@ -3374,7 +3638,32 @@ again:
                        goto again;
        }
 
-       RETURN(rc = -EREMCHG);
+       EXIT;
+}
+
+static int osd_fail_fid_lookup(struct osd_thread_info *oti,
+                              struct osd_device *dev,
+                              struct osd_idmap_cache *oic,
+                              struct lu_fid *fid, __u32 ino)
+{
+       struct lustre_mdt_attrs *lma   = &oti->oti_mdt_attrs;
+       struct inode            *inode;
+       int                      rc;
+
+       osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
+       inode = osd_iget(oti, dev, &oic->oic_lid);
+       if (IS_ERR(inode)) {
+               fid_zero(&oic->oic_fid);
+               return PTR_ERR(inode);
+       }
+
+       rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, lma);
+       iput(inode);
+       if (rc != 0)
+               fid_zero(&oic->oic_fid);
+       else
+               *fid = oic->oic_fid = lma->lma_self_fid;
+       return rc;
 }
 
 /**
@@ -3396,6 +3685,7 @@ static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
         struct htree_lock          *hlock = NULL;
         int                         ino;
         int                         rc;
+       ENTRY;
 
         LASSERT(dir->i_op != NULL && dir->i_op->lookup != NULL);
 
@@ -3407,36 +3697,46 @@ static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
                                    dir, LDISKFS_HLOCK_LOOKUP);
         } else {
-                cfs_down_read(&obj->oo_ext_idx_sem);
+               down_read(&obj->oo_ext_idx_sem);
         }
 
         bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
         if (bh) {
                struct osd_thread_info *oti = osd_oti_get(env);
+               struct osd_inode_id *id = &oti->oti_id;
                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);
+               if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
+                       brelse(bh);
+                       rc = osd_fail_fid_lookup(oti, dev, oic, fid, ino);
+                       GOTO(out, rc);
+               }
+
                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);
+                       rc = osd_ea_fid_get(env, obj, ino, fid, id);
                else
-                       osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
-
-               if (rc != 0 || !fid_is_norm(fid))
+                       osd_id_gen(id, ino, OSD_OII_NOGEN);
+               if (rc != 0 || osd_remote_fid(env, dev, fid)) {
+                       fid_zero(&oic->oic_fid);
                        GOTO(out, rc);
+               }
 
+               oic->oic_lid = *id;
                oic->oic_fid = *fid;
                if ((scrub->os_pos_current <= ino) &&
-                   (sf->sf_flags & SF_INCONSISTENT ||
+                   ((sf->sf_flags & SF_INCONSISTENT) ||
+                    (sf->sf_flags & SF_UPGRADE && fid_is_igif(fid)) ||
                     ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
                                      sf->sf_oi_bitmap)))
-                       rc = osd_consistency_check(oti, dev, oic);
+                       osd_consistency_check(oti, dev, oic);
        } else {
                rc = -ENOENT;
        }
@@ -3447,7 +3747,7 @@ out:
        if (hlock != NULL)
                ldiskfs_htree_unlock(hlock);
        else
-               cfs_up_read(&obj->oo_ext_idx_sem);
+               up_read(&obj->oo_ext_idx_sem);
        return rc;
 }
 
@@ -3468,7 +3768,17 @@ struct osd_object *osd_object_find(const struct lu_env *env,
         struct lu_object  *luch;
         struct lu_object  *lo;
 
-        luch = lu_object_find(env, ludev, fid, NULL);
+       /*
+        * 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);
@@ -3509,29 +3819,61 @@ static inline void osd_object_put(const struct lu_env *env,
 }
 
 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 dt_object *dt,
+                                      const struct dt_rec *rec,
+                                      const struct dt_key *key,
+                                      struct thandle *handle)
+{
+       struct osd_thandle      *oh;
+       struct osd_device       *osd   = osd_dev(dt->do_lu.lo_dev);
+       struct lu_fid           *fid = (struct lu_fid *)rec;
+       int                     rc;
+       ENTRY;
 
-        LASSERT(dt_object_exists(dt));
-        LASSERT(handle != NULL);
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
+       LASSERT(handle != NULL);
 
-        oh = container_of0(handle, struct osd_thandle, ot_super);
-        LASSERT(oh->ot_handle == NULL);
+       oh = container_of0(handle, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle == NULL);
 
-        OSD_DECLARE_OP(oh, insert);
-        oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
+       osd_trans_declare_op(env, oh, OSD_OT_INSERT,
+                            osd_dto_credits_noquota[DTO_INDEX_INSERT]);
+
+       if (osd_dt_obj(dt)->oo_inode == NULL) {
+               const char *name  = (const char *)key;
+               /* Object is not being created yet. Only happens when
+                *     1. declare directory create
+                *     2. declare insert .
+                *     3. declare insert ..
+                */
+               LASSERT(strcmp(name, dotdot) == 0 || strcmp(name, dot) == 0);
+       } else {
+               struct inode *inode = osd_dt_obj(dt)->oo_inode;
 
-        LASSERT(osd_dt_obj(dt)->oo_inode);
-        osd_declare_qid(dt, oh, USRQUOTA, osd_dt_obj(dt)->oo_inode->i_uid,
-                        osd_dt_obj(dt)->oo_inode);
-        osd_declare_qid(dt, oh, GRPQUOTA, osd_dt_obj(dt)->oo_inode->i_gid,
-                        osd_dt_obj(dt)->oo_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 0;
+       if (fid == NULL)
+               RETURN(0);
+
+       rc = osd_remote_fid(env, osd, fid);
+       if (rc <= 0)
+               RETURN(rc);
+
+       rc = 0;
+
+       osd_trans_declare_op(env, oh, OSD_OT_CREATE,
+                            osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
+       osd_trans_declare_op(env, oh, OSD_OT_INSERT,
+                            osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
+       osd_trans_declare_op(env, oh, OSD_OT_INSERT,
+                            osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
+
+       RETURN(rc);
 }
 
 /**
@@ -3550,43 +3892,79 @@ 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;
-
-        ENTRY;
+       struct osd_object       *obj = osd_dt_obj(dt);
+       struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
+       struct lu_fid           *fid = (struct lu_fid *) rec;
+       const char              *name = (const char *)key;
+       struct osd_thread_info  *oti   = osd_oti_get(env);
+       struct osd_inode_id     *id    = &oti->oti_id;
+       struct inode            *child_inode = NULL;
+       struct osd_object       *child = NULL;
+       int                     rc;
+       ENTRY;
 
         LASSERT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
         LASSERT(th != NULL);
 
+       osd_trans_exec_op(env, th, OSD_OT_INSERT);
+
         if (osd_object_auth(env, dt, capa, CAPA_OPC_INDEX_INSERT))
                 RETURN(-EACCES);
 
-        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
-                rc = osd_ea_add_rec(env, obj, child->oo_inode, name, rec, th);
-#ifdef HAVE_QUOTA_SUPPORT
-                cfs_curproc_cap_unpack(save);
-#endif
-                osd_object_put(env, child);
-        } else {
-                rc = PTR_ERR(child);
-        }
+       LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!", PFID(fid));
 
-        LASSERT(osd_invariant(obj));
-        RETURN(rc);
+       rc = osd_remote_fid(env, osd, fid);
+       if (rc < 0) {
+               CERROR("%s: Can not find object "DFID" rc %d\n",
+                      osd_name(osd), PFID(fid), rc);
+               RETURN(rc);
+       }
+
+       if (rc == 1) {
+               /* Insert remote entry */
+               if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
+                       struct osd_mdobj_map    *omm = osd->od_mdt_map;
+                       struct osd_thandle      *oh;
+
+                       /* If parent on remote MDT, we need put this object
+                        * under AGENT */
+                       oh = container_of(th, typeof(*oh), ot_super);
+                       rc = osd_add_to_agent(env, osd, obj, oh);
+                       if (rc != 0) {
+                               CERROR("%s: add agent "DFID" error: rc = %d\n",
+                                      osd_name(osd),
+                                      PFID(lu_object_fid(&dt->do_lu)), rc);
+                               RETURN(rc);
+                       }
+
+                       child_inode = igrab(omm->omm_agent_dentry->d_inode);
+               } else {
+                       child_inode = osd_create_remote_inode(env, osd, obj,
+                                                             fid, th);
+                       if (IS_ERR(child_inode))
+                               RETURN(PTR_ERR(child_inode));
+               }
+       } else {
+               /* Insert local entry */
+               child = osd_object_find(env, dt, fid);
+               if (IS_ERR(child)) {
+                       CERROR("%s: Can not find object "DFID"%u:%u: rc = %d\n",
+                              osd_name(osd), PFID(fid),
+                              id->oii_ino, id->oii_gen,
+                              (int)PTR_ERR(child_inode));
+                       RETURN(PTR_ERR(child_inode));
+               }
+               child_inode = igrab(child->oo_inode);
+       }
+
+       rc = osd_ea_add_rec(env, obj, child_inode, name, rec, th);
+
+       iput(child_inode);
+       if (child != NULL)
+               osd_object_put(env, child);
+       LASSERT(osd_invariant(obj));
+       RETURN(rc);
 }
 
 /**
@@ -3652,7 +4030,14 @@ 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 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);
 }
@@ -3662,7 +4047,6 @@ static int osd_it_iam_get(const struct lu_env *env,
  *
  *  \param  di      osd iterator
  */
-
 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
 {
         struct osd_it_iam *it = (struct osd_it_iam *)di;
@@ -3694,9 +4078,20 @@ 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;
 }
 
 /**
@@ -3710,44 +4105,42 @@ 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, int len, __u16 type)
 {
-        struct luda_type *lt;
-        const unsigned    align = sizeof(struct luda_type) - 1;
+       /* check if file type is required */
+       if (ent->lde_attrs & LUDA_TYPE) {
+               struct luda_type *lt;
+               int align = sizeof(*lt) - 1;
 
-        /* check if file type is required */
-        if (attr & LUDA_TYPE) {
-                        len = (len + align) & ~align;
-
-                        lt = (void *) ent->lde_name + len;
-                        lt->lt_type = cpu_to_le16(CFS_DTTOIF(type));
-                        ent->lde_attrs |= LUDA_TYPE;
-        }
+               len = (len + align) & ~align;
+               lt = (struct luda_type *)(ent->lde_name + len);
+               lt->lt_type = cpu_to_le16(DTTOIF(type));
+       }
 
-        ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
+       ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
 }
 
 /**
  * build lu direct from backend fs dirent.
  */
 
-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)
+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)
 {
-        fid_cpu_to_le(&ent->lde_fid, fid);
-        ent->lde_attrs = LUDA_FID;
+       ent->lde_attrs = attr | LUDA_FID;
+       fid_cpu_to_le(&ent->lde_fid, fid);
 
-        ent->lde_hash = cpu_to_le64(offset);
-        ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
+       ent->lde_hash = cpu_to_le64(offset);
+       ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
 
-        strncpy(ent->lde_name, name, namelen);
-        ent->lde_namelen = cpu_to_le16(namelen);
+       strncpy(ent->lde_name, name, namelen);
+       ent->lde_name[namelen] = '\0';
+       ent->lde_namelen = cpu_to_le16(namelen);
 
-        /* append lustre attributes */
-        osd_it_append_attrs(ent, attr, namelen, type);
+       /* append lustre attributes */
+       osd_it_append_attrs(ent, namelen, type);
 }
 
 /**
@@ -3789,6 +4182,10 @@ static int osd_it_iam_rec(const struct lu_env *env,
                /* 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);
@@ -3846,6 +4243,7 @@ static const struct dt_index_operations osd_index_iam_ops = {
         }
 };
 
+
 /**
  * Creates or initializes iterator context.
  *
@@ -3952,6 +4350,7 @@ static int osd_ldiskfs_filldir(char *buf, const char *name, int namelen,
                                unsigned d_type)
 {
         struct osd_it_ea        *it   = (struct osd_it_ea *)buf;
+       struct osd_object       *obj  = it->oie_obj;
         struct osd_it_ea_dirent *ent  = it->oie_dirent;
         struct lu_fid           *fid  = &ent->oied_fid;
         struct osd_fid_pack     *rec;
@@ -3967,16 +4366,23 @@ static int osd_ldiskfs_filldir(char *buf, const char *name, int namelen,
             OSD_IT_EA_BUFSIZE)
                 RETURN(1);
 
-        if (d_type & LDISKFS_DIRENT_LUFID) {
-                rec = (struct osd_fid_pack*) (name + namelen + 1);
-
-                if (osd_fid_unpack(fid, rec) != 0)
-                        fid_zero(fid);
+       /* "." is just the object itself. */
+       if (namelen == 1 && name[0] == '.') {
+               *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
+       } else if (d_type & LDISKFS_DIRENT_LUFID) {
+               rec = (struct osd_fid_pack*) (name + namelen + 1);
+               if (osd_fid_unpack(fid, rec) != 0)
+                       fid_zero(fid);
+       } else {
+               fid_zero(fid);
+       }
+       d_type &= ~LDISKFS_DIRENT_LUFID;
 
-                d_type &= ~LDISKFS_DIRENT_LUFID;
-        } else {
-                fid_zero(fid);
-        }
+       /* NOT export local root. */
+       if (unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
+               ino = obj->oo_inode->i_ino;
+               *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
+       }
 
         ent->oied_ino     = ino;
         ent->oied_off     = offset;
@@ -4017,7 +4423,7 @@ static int osd_ldiskfs_it_fill(const struct lu_env *env,
                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
                                    inode, LDISKFS_HLOCK_READDIR);
         } else {
-                cfs_down_read(&obj->oo_ext_idx_sem);
+               down_read(&obj->oo_ext_idx_sem);
         }
 
         result = inode->i_fop->readdir(&it->oie_file, it,
@@ -4026,7 +4432,7 @@ static int osd_ldiskfs_it_fill(const struct lu_env *env,
         if (hlock != NULL)
                 ldiskfs_htree_unlock(hlock);
         else
-                cfs_up_read(&obj->oo_ext_idx_sem);
+               up_read(&obj->oo_ext_idx_sem);
 
         if (it->oie_rd_dirent == 0) {
                 result = -EIO;
@@ -4102,10 +4508,337 @@ static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
         return it->oie_dirent->oied_namelen;
 }
 
+static int
+osd_dirent_update(handle_t *jh, struct super_block *sb,
+                 struct osd_it_ea_dirent *ent, struct lu_fid *fid,
+                 struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de)
+{
+       struct osd_fid_pack *rec;
+       int                  rc;
+       ENTRY;
+
+       LASSERT(de->file_type & LDISKFS_DIRENT_LUFID);
+       LASSERT(de->rec_len >= de->name_len + sizeof(struct osd_fid_pack));
+
+       rc = ldiskfs_journal_get_write_access(jh, bh);
+       if (rc != 0) {
+               CERROR("%.16s: fail to write access for update dirent: "
+                      "name = %.*s, rc = %d\n",
+                      LDISKFS_SB(sb)->s_es->s_volume_name,
+                      ent->oied_namelen, ent->oied_name, rc);
+               RETURN(rc);
+       }
+
+       rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
+       fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
+       rc = ldiskfs_journal_dirty_metadata(jh, bh);
+       if (rc != 0)
+               CERROR("%.16s: fail to dirty metadata for update dirent: "
+                      "name = %.*s, rc = %d\n",
+                      LDISKFS_SB(sb)->s_es->s_volume_name,
+                      ent->oied_namelen, ent->oied_name, rc);
+
+       RETURN(rc);
+}
+
+static inline int
+osd_dirent_has_space(__u16 reclen, __u16 namelen, unsigned blocksize)
+{
+       if (ldiskfs_rec_len_from_disk(reclen, blocksize) >=
+           __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
+               return 1;
+       else
+               return 0;
+}
+
+static int
+osd_dirent_reinsert(const struct lu_env *env, handle_t *jh,
+                   struct inode *dir, struct inode *inode,
+                   struct osd_it_ea_dirent *ent, struct lu_fid *fid,
+                   struct buffer_head *bh, struct ldiskfs_dir_entry_2 *de,
+                   struct htree_lock *hlock)
+{
+       struct dentry               *dentry;
+       struct osd_fid_pack         *rec;
+       struct ldiskfs_dentry_param *ldp;
+       int                          rc;
+       ENTRY;
+
+       if (!LDISKFS_HAS_INCOMPAT_FEATURE(inode->i_sb,
+                                         LDISKFS_FEATURE_INCOMPAT_DIRDATA))
+               RETURN(0);
+
+       /* There is enough space to hold the FID-in-dirent. */
+       if (osd_dirent_has_space(de->rec_len, ent->oied_namelen,
+                                dir->i_sb->s_blocksize)) {
+               rc = ldiskfs_journal_get_write_access(jh, bh);
+               if (rc != 0) {
+                       CERROR("%.16s: fail to write access for reinsert "
+                              "dirent: name = %.*s, rc = %d\n",
+                              LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+                              ent->oied_namelen, ent->oied_name, rc);
+                       RETURN(rc);
+               }
+
+               de->name[de->name_len] = 0;
+               rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
+               rec->fp_len = sizeof(struct lu_fid) + 1;
+               fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
+               de->file_type |= LDISKFS_DIRENT_LUFID;
+
+               rc = ldiskfs_journal_dirty_metadata(jh, bh);
+               if (rc != 0)
+                       CERROR("%.16s: fail to dirty metadata for reinsert "
+                              "dirent: name = %.*s, rc = %d\n",
+                              LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+                              ent->oied_namelen, ent->oied_name, rc);
+
+               RETURN(rc);
+       }
+
+       rc = ldiskfs_delete_entry(jh, dir, de, bh);
+       if (rc != 0) {
+               CERROR("%.16s: fail to delete entry for reinsert dirent: "
+                      "name = %.*s, rc = %d\n",
+                      LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+                      ent->oied_namelen, ent->oied_name, rc);
+               RETURN(rc);
+       }
+
+       dentry = osd_child_dentry_by_inode(env, dir, ent->oied_name,
+                                          ent->oied_namelen);
+       ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
+       osd_get_ldiskfs_dirent_param(ldp, (const struct dt_rec *)fid);
+       dentry->d_fsdata = (void *)ldp;
+       ll_vfs_dq_init(dir);
+       rc = osd_ldiskfs_add_entry(jh, dentry, inode, hlock);
+       /* It is too bad, we cannot reinsert the name entry back.
+        * That means we lose it! */
+       if (rc != 0)
+               CERROR("%.16s: fail to insert entry for reinsert dirent: "
+                      "name = %.*s, rc = %d\n",
+                      LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
+                      ent->oied_namelen, ent->oied_name, rc);
+
+       RETURN(rc);
+}
+
+static int
+osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
+                       struct osd_it_ea *it, struct lu_fid *fid,
+                       struct osd_inode_id *id, __u32 *attr)
+{
+       struct osd_thread_info     *info        = osd_oti_get(env);
+       struct lustre_mdt_attrs    *lma         = &info->oti_mdt_attrs;
+       struct osd_device          *dev         = osd_obj2dev(obj);
+       struct super_block         *sb          = osd_sb(dev);
+       const char                 *devname     =
+                                       LDISKFS_SB(sb)->s_es->s_volume_name;
+       struct osd_it_ea_dirent    *ent         = it->oie_dirent;
+       struct inode               *dir         = obj->oo_inode;
+       struct htree_lock          *hlock       = NULL;
+       struct buffer_head         *bh          = NULL;
+       handle_t                   *jh          = NULL;
+       struct ldiskfs_dir_entry_2 *de;
+       struct dentry              *dentry;
+       struct inode               *inode;
+       int                         credits;
+       int                         rc;
+       bool                        dirty       = false;
+       bool                        is_dotdot   = false;
+       ENTRY;
+
+       if (ent->oied_name[0] == '.') {
+               /* Skip dot entry, even if it has stale FID-in-dirent, because
+                * we do not use such FID-in-dirent anymore, it is harmless. */
+               if (ent->oied_namelen == 1)
+                       RETURN(0);
+
+               if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
+                       is_dotdot = true;
+       }
+
+       dentry = osd_child_dentry_get(env, obj, ent->oied_name,
+                                     ent->oied_namelen);
+
+       /* We need to ensure that the name entry is still valid.
+        * Because it may be removed or renamed by other already.
+        *
+        * The unlink or rename operation will start journal before PDO lock,
+        * so to avoid deadlock, here we need to start journal handle before
+        * related PDO lock also. But because we do not know whether there
+        * will be something to be repaired before PDO lock, we just start
+        * journal without conditions.
+        *
+        * We may need to remove the name entry firstly, then insert back.
+        * One credit is for user quota file update.
+        * One credit is for group quota file update.
+        * Two credits are for dirty inode. */
+       credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
+                 osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
+
+again:
+       if (dev->od_dirent_journal) {
+               jh = ldiskfs_journal_start_sb(sb, credits);
+               if (IS_ERR(jh)) {
+                       rc = PTR_ERR(jh);
+                       CERROR("%.16s: fail to start trans for dirent "
+                              "check_repair: credits %d, name %.*s, rc %d\n",
+                              devname, credits, ent->oied_namelen,
+                              ent->oied_name, rc);
+                       RETURN(rc);
+               }
+       }
+
+       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);
+       /* For dotdot entry, if there is not enough space to hold FID-in-dirent,
+        * just keep it there. It only happens when the device upgraded from 1.8
+        * or restored from MDT file-level backup. For the whole directory, only
+        * dotdot entry has no FID-in-dirent and needs to get FID from LMA when
+        * readdir, it will not affect the performance much. */
+       if ((bh == NULL) || (le32_to_cpu(de->inode) != ent->oied_ino) ||
+           (is_dotdot && !osd_dirent_has_space(de->rec_len,
+                                               ent->oied_namelen,
+                                               sb->s_blocksize))) {
+               *attr |= LUDA_IGNORE;
+               GOTO(out_journal, rc = 0);
+       }
+
+       osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
+       inode = osd_iget(info, dev, id);
+       if (IS_ERR(inode)) {
+               rc = PTR_ERR(inode);
+               if (rc == -ENOENT || rc == -ESTALE) {
+                       *attr |= LUDA_IGNORE;
+                       rc = 0;
+               }
+
+               GOTO(out_journal, rc);
+       }
+
+       rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
+       if (rc == 0) {
+               if (fid_is_sane(fid)) {
+                       /* FID-in-dirent is valid. */
+                       if (lu_fid_eq(fid, &lma->lma_self_fid))
+                               GOTO(out_inode, rc = 0);
+
+                       /* Do not repair under dryrun mode. */
+                       if (*attr & LUDA_VERIFY_DRYRUN) {
+                               *attr |= LUDA_REPAIR;
+                               GOTO(out_inode, rc = 0);
+                       }
+
+                       if (!dev->od_dirent_journal) {
+                               iput(inode);
+                               brelse(bh);
+                               if (hlock != NULL)
+                                       ldiskfs_htree_unlock(hlock);
+                               else
+                                       up_write(&obj->oo_ext_idx_sem);
+                               dev->od_dirent_journal = 1;
+                               goto again;
+                       }
+
+                       *fid = lma->lma_self_fid;
+                       dirty = true;
+                       /* Update the FID-in-dirent. */
+                       rc = osd_dirent_update(jh, sb, ent, fid, bh, de);
+                       if (rc == 0)
+                               *attr |= LUDA_REPAIR;
+               } else {
+                       /* Do not repair under dryrun mode. */
+                       if (*attr & LUDA_VERIFY_DRYRUN) {
+                               *attr |= LUDA_REPAIR;
+                               GOTO(out_inode, rc = 0);
+                       }
+
+                       if (!dev->od_dirent_journal) {
+                               iput(inode);
+                               brelse(bh);
+                               if (hlock != NULL)
+                                       ldiskfs_htree_unlock(hlock);
+                               else
+                                       up_write(&obj->oo_ext_idx_sem);
+                               dev->od_dirent_journal = 1;
+                               goto again;
+                       }
+
+                       *fid = lma->lma_self_fid;
+                       dirty = true;
+                       /* Append the FID-in-dirent. */
+                       rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
+                                                fid, bh, de, hlock);
+                       if (rc == 0)
+                               *attr |= LUDA_REPAIR;
+               }
+       } else if (rc == -ENODATA) {
+               /* Do not repair under dryrun mode. */
+               if (*attr & LUDA_VERIFY_DRYRUN) {
+                       if (fid_is_sane(fid))
+                               *attr |= LUDA_REPAIR;
+                       else
+                               *attr |= LUDA_UPGRADE;
+                       GOTO(out_inode, rc = 0);
+               }
+
+               if (!dev->od_dirent_journal) {
+                       iput(inode);
+                       brelse(bh);
+                       if (hlock != NULL)
+                               ldiskfs_htree_unlock(hlock);
+                       else
+                               up_write(&obj->oo_ext_idx_sem);
+                       dev->od_dirent_journal = 1;
+                       goto again;
+               }
+
+               dirty = true;
+               if (unlikely(fid_is_sane(fid))) {
+                       /* FID-in-dirent exists, but FID-in-LMA is lost.
+                        * Trust the FID-in-dirent, and add FID-in-LMA. */
+                       rc = osd_ea_fid_set(info, inode, fid);
+                       if (rc == 0)
+                               *attr |= LUDA_REPAIR;
+               } else {
+                       lu_igif_build(fid, inode->i_ino, inode->i_generation);
+                       /* It is probably IGIF object. Only aappend the
+                        * FID-in-dirent. OI scrub will process FID-in-LMA. */
+                       rc = osd_dirent_reinsert(env, jh, dir, inode, ent,
+                                                fid, bh, de, hlock);
+                       if (rc == 0)
+                               *attr |= LUDA_UPGRADE;
+               }
+       }
+
+       GOTO(out_inode, rc);
+
+out_inode:
+       iput(inode);
+
+out_journal:
+       brelse(bh);
+       if (hlock != NULL)
+               ldiskfs_htree_unlock(hlock);
+       else
+               up_write(&obj->oo_ext_idx_sem);
+       if (jh != NULL)
+               ldiskfs_journal_stop(jh);
+       if (rc >= 0 && !dirty)
+               dev->od_dirent_journal = 0;
+       return rc;
+}
 
 /**
- * Returns the value (i.e. fid/igif) at current position from iterator's
- * in memory structure.
+ * Returns the value at current position from iterator's in memory structure.
  *
  * \param di struct osd_it_ea, iterator's in memory structure
  * \param attr attr requested for dirent.
@@ -4124,6 +4857,7 @@ static inline int osd_it_ea_rec(const struct lu_env *env,
        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_inode_id    *id    = &oti->oti_id;
        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;
@@ -4131,27 +4865,50 @@ static inline int osd_it_ea_rec(const struct lu_env *env,
        int                     rc    = 0;
        ENTRY;
 
-       if (!fid_is_sane(fid)) {
-               rc = osd_ea_fid_get(env, obj, ino, fid, &oic->oic_lid);
-               if (rc != 0)
-                       RETURN(rc);
+       if (attr & LUDA_VERIFY) {
+               attr |= LUDA_TYPE;
+               if (unlikely(ino == osd_sb(dev)->s_root->d_inode->i_ino)) {
+                       attr |= LUDA_IGNORE;
+                       rc = 0;
+                       goto pack;
+               }
+
+               rc = osd_dirent_check_repair(env, obj, it, fid, id, &attr);
        } else {
-               osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
+               attr &= ~LU_DIRENT_ATTRS_MASK;
+               if (!fid_is_sane(fid)) {
+                       if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
+                               RETURN(-ENOENT);
+
+                       rc = osd_ea_fid_get(env, obj, ino, fid, id);
+               } else {
+                       osd_id_gen(id, ino, OSD_OII_NOGEN);
+               }
        }
 
+       if (rc < 0)
+               RETURN(rc);
+
+pack:
        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);
 
-       if (!fid_is_norm(fid))
+       if (osd_remote_fid(env, dev, fid))
                RETURN(0);
 
-       oic->oic_fid = *fid;
-       if ((scrub->os_pos_current <= ino) &&
-           (sf->sf_flags & SF_INCONSISTENT ||
+       if (likely(!(attr & LUDA_IGNORE))) {
+               oic->oic_lid = *id;
+               oic->oic_fid = *fid;
+       }
+
+       if (!(attr & LUDA_VERIFY) &&
+           (scrub->os_pos_current <= ino) &&
+           ((sf->sf_flags & SF_INCONSISTENT) ||
+            (sf->sf_flags & SF_UPGRADE && fid_is_igif(fid)) ||
             ldiskfs_test_bit(osd_oi_fid2idx(dev, fid), sf->sf_oi_bitmap)))
-               rc = osd_consistency_check(oti, dev, oic);
+               osd_consistency_check(oti, dev, oic);
 
        RETURN(rc);
 }
@@ -4221,7 +4978,6 @@ 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);
@@ -4282,12 +5038,14 @@ static void *osd_key_init(const struct lu_context *ctx,
 static void osd_key_fini(const struct lu_context *ctx,
                          struct lu_context_key *key, void* data)
 {
-        struct osd_thread_info *info = data;
+       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);
+       if (info->oti_hlock != NULL)
+               ldiskfs_htree_lock_free(info->oti_hlock);
+       OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
+       lu_buf_free(&info->oti_iobuf.dr_pg_buf);
+       lu_buf_free(&info->oti_iobuf.dr_bl_buf);
+       OBD_FREE_PTR(info);
 }
 
 static void osd_key_exit(const struct lu_context *ctx,
@@ -4316,7 +5074,9 @@ static int osd_device_init(const struct lu_env *env, struct lu_device *d,
 {
        struct osd_device *osd = osd_dev(d);
 
-       strncpy(osd->od_svname, name, MAX_OBD_NAME);
+       if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname))
+           >= sizeof(osd->od_svname))
+               return -E2BIG;
        return osd_procfs_init(osd, name);
 }
 
@@ -4343,51 +5103,97 @@ static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
 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;
-        int                       rc = 0;
-
+       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_mnt != NULL)
+               RETURN(0);
+
+       if (strlen(dev) >= sizeof(o->od_mntdev))
+               RETURN(-E2BIG);
+       strcpy(o->od_mntdev, dev);
+
         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 (o->od_mount != NULL) {
-                CERROR("Already mounted (%s)\n", dev);
-                RETURN(-EEXIST);
-        }
+       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);
 
-        /* get mount */
-        lmi = server_get_mount(dev);
-        if (lmi == NULL) {
-                CERROR("Cannot get mount info for %s!\n", dev);
-                RETURN(-EFAULT);
-        }
+       /* Glom up mount options */
+       if (*options != '\0')
+               strcat(options, ",");
+       strlcat(options, "no_mbcache", CFS_PAGE_SIZE);
 
-        LASSERT(lmi != NULL);
-        /* save lustre_mount_info in dt_device */
-        o->od_mount = lmi;
-        o->od_mnt = lmi->lmi_mnt;
+       type = get_fs_type("ldiskfs");
+       if (!type) {
+               CERROR("%s: cannot find ldiskfs module\n", name);
+               GOTO(out, rc = -ENODEV);
+       }
 
-        lsi = s2lsi(lmi->lmi_sb);
-        ldd = lsi->lsi_ldd;
+       o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
+       cfs_module_put(type->owner);
 
-        if (ldd->ldd_flags & LDD_F_IAM_DIR) {
-                o->od_iop_mode = 0;
-                LCONSOLE_WARN("%s: OSD: IAM mode enabled\n", dev);
-        } else
-                o->od_iop_mode = 1;
+       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 (ldd->ldd_flags & LDD_F_SV_TYPE_OST) {
-                rc = osd_compat_init(o);
-                if (rc)
-                        CERROR("%s: can't initialize compats: %d\n", dev, rc);
-        }
+#ifdef HAVE_DEV_SET_RDONLY
+       if (dev_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);
+       }
+#endif
+
+       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);
+       }
+
+       ldiskfs_set_inode_state(osd_sb(o)->s_root->d_inode,
+                               LDISKFS_STATE_LUSTRE_NO_OI);
+       if (lmd_flags & LMD_FLG_NOSCRUB)
+               o->od_noscrub = 1;
+
+out:
+       if (__page)
+               OBD_PAGE_FREE(__page);
+       if (rc)
+               fsfilt_put_ops(o->od_fsops);
 
         RETURN(rc);
 }
@@ -4398,7 +5204,9 @@ static struct lu_device *osd_device_fini(const struct lu_env *env,
         int rc;
         ENTRY;
 
-        osd_compat_fini(osd_dev(d));
+       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));
@@ -4409,46 +5217,138 @@ 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;
+       }
 
         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;
+       int                     cplen = 0;
+
+       /* 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);
+
+       CFS_INIT_LIST_HEAD(&o->od_ios_list);
+       /* setup scrub, including OI files initialization */
+       rc = osd_scrub_setup(env, o);
+       if (rc < 0)
+               GOTO(out_mnt, rc);
+
+       cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
+                       sizeof(o->od_svname));
+       if (cplen >= sizeof(o->od_svname)) {
+               rc = -E2BIG;
+               GOTO(out_mnt, rc);
+       }
+
+       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);
-                       cfs_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) {
-                                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,
@@ -4458,6 +5358,14 @@ 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);
@@ -4476,8 +5384,8 @@ static int osd_process_config(const struct lu_env *env,
                 break;
         case LCFG_CLEANUP:
                lu_dev_del_linkage(d->ld_site, d);
-                err = osd_shutdown(env, o);
-                break;
+               err = osd_shutdown(env, o);
+               break;
         default:
                 err = -ENOSYS;
         }
@@ -4488,53 +5396,92 @@ 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,
                        struct lu_device *dev)
 {
        struct osd_device *osd = osd_dev(dev);
-       int                result;
+       int                result = 0;
        ENTRY;
 
-       /* 1. setup scrub, including OI files initialization */
-       result = osd_scrub_setup(env, osd);
-        if (result < 0)
-                RETURN(result);
-
-       /* 2. setup quota slave instance */
-       osd->od_quota_slave = qsd_init(env, osd->od_svname, &osd->od_dt_dev,
-                                      osd->od_proc_entry);
-       if (IS_ERR(osd->od_quota_slave)) {
-               result = PTR_ERR(osd->od_quota_slave);
-               osd->od_quota_slave = NULL;
-               RETURN(result);
+       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);
        }
 
-#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 3, 55, 0)
-       /* Unfortunately, the current MDD implementation relies on some specific
-        * code to be executed in the OSD layer. Since OFD now also uses the OSD
-        * module, we need a way to skip the metadata-specific code when running
-        * with OFD.
-        * The hack here is to check the type of the parent device which is
-        * either MD (i.e. MDD device) with the current MDT stack or DT (i.e.
-        * OFD device) on an OST. As a reminder, obdfilter does not use the OSD
-        * layer and still relies on lvfs. This hack won't work any more when
-        * LOD is landed since LOD is of DT type.
-        * This code should be removed once the orion MDT changes (LOD/OSP, ...)
-        * have been landed */
-       osd->od_is_md = lu_device_is_md(pdev);
-#else
-#warning "all is_md checks must be removed from osd-ldiskfs"
-#endif
+       if (osd->od_quota_slave != NULL)
+               /* set up quota slave objects */
+               result = qsd_prepare(env, osd->od_quota_slave);
 
-        if (!osd->od_is_md)
-                RETURN(0);
-
-        /* 3. setup local objects */
-        result = llo_local_objects_setup(env, lu2md_dev(pdev), lu2dt_dev(dev));
-        RETURN(result);
+       RETURN(result);
 }
 
 static const struct lu_object_operations osd_lu_obj_ops = {
@@ -4567,9 +5514,9 @@ 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_LOCAL,
 };
@@ -4578,7 +5525,9 @@ static struct lu_device_type osd_device_type = {
  * lprocfs legacy support.
  */
 static struct obd_ops osd_obd_device_ops = {
-        .o_owner = THIS_MODULE
+       .o_owner = THIS_MODULE,
+       .o_connect      = osd_obd_connect,
+       .o_disconnect   = osd_obd_disconnect
 };
 
 static int __init osd_mod_init(void)
@@ -4588,16 +5537,16 @@ static int __init osd_mod_init(void)
         osd_oi_mod_init();
         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)
 {
-        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, "0.1.0", osd_mod_init, osd_mod_exit);