Whamcloud - gitweb
LU-2886 obdclass: remove obsoleted md_local_file.c
[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
index 49258c6..95538e5 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, 2013, 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>
 #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
+
+int ldiskfs_track_declares_assert;
+CFS_MODULE_PARM(ldiskfs_track_declares_assert, "i", int, 0644,
+               "LBUG during tracking of declares");
 
 static const char dot[] = ".";
 static const char dotdot[] = "..";
@@ -93,6 +88,20 @@ 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;
 
+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,
+};
+
 static int osd_has_index(const struct osd_object *obj)
 {
         return obj->oo_dt.do_index_ops != NULL;
@@ -152,35 +161,44 @@ static struct lu_object *osd_object_alloc(const struct lu_env *env,
                 dt_object_init(&mo->oo_dt, NULL, d);
                mo->oo_dt.do_ops = &osd_obj_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;
+       dentry->d_sb = inode->i_sb;
+       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));
+       CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
+       rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
+                            info->oti_mdt_attrs_old, LMA_OLD_SIZE);
        if (rc > 0) {
+               if ((void *)lma != (void *)info->oti_mdt_attrs_old)
+                       memcpy(lma, info->oti_mdt_attrs_old, sizeof(*lma));
+               rc = 0;
+               lustre_lma_swab(lma);
                /* Check LMA compatibility */
-               if (lma->lma_incompat & ~cpu_to_le32(LMA_INCOMPAT_SUPP)) {
-                       CWARN("%.16s: unsupported incompat LMA feature(s) "
-                             "%lx/%#x\n",
+               if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
+                       CWARN("%.16s: unsupported incompat LMA feature(s) %#x "
+                             "for fid = "DFID", ino = %lu\n",
                              LDISKFS_SB(inode->i_sb)->s_es->s_volume_name,
-                             inode->i_ino, le32_to_cpu(lma->lma_incompat) &
-                                                       ~LMA_INCOMPAT_SUPP);
-                       rc = -ENOSYS;
-               } else {
-                       lustre_lma_swab(lma);
-                       rc = 0;
+                             lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
+                             PFID(&lma->lma_self_fid), inode->i_ino);
+                       rc = -EOPNOTSUPP;
                }
        } else if (rc == 0) {
                rc = -ENODATA;
@@ -235,8 +253,9 @@ 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;
@@ -246,11 +265,14 @@ 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);
@@ -270,7 +292,7 @@ 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;
 
@@ -343,13 +365,13 @@ 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);
@@ -425,6 +447,50 @@ static void osd_object_init0(struct osd_object *obj)
                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
 }
 
+static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
+{
+       struct osd_thread_info  *info   = osd_oti_get(env);
+       struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
+       int                     rc;
+       ENTRY;
+
+       CLASSERT(LMA_OLD_SIZE >= sizeof(*lma));
+       rc = __osd_xattr_get(obj->oo_inode, &info->oti_obj_dentry,
+                            XATTR_NAME_LMA, info->oti_mdt_attrs_old,
+                            LMA_OLD_SIZE);
+       if (rc > 0) {
+               rc = 0;
+               lustre_lma_swab(lma);
+               if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
+                            CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
+                       rc = -EOPNOTSUPP;
+                       CWARN("%s: unsupported incompat LMA feature(s) %#x for "
+                             "fid = "DFID", ino = %lu: rc = %d\n",
+                             osd_obj2dev(obj)->od_svname,
+                             lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
+                             PFID(lu_object_fid(&obj->oo_dt.do_lu)),
+                             obj->oo_inode->i_ino, rc);
+               }
+               if (unlikely(!lu_fid_eq(lu_object_fid(&obj->oo_dt.do_lu),
+                                       &lma->lma_self_fid))) {
+                       CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
+                              osd_obj2dev(obj)->od_svname,
+                              PFID(lu_object_fid(&obj->oo_dt.do_lu)),
+                              PFID(&lma->lma_self_fid));
+                       if (obj->oo_inode != NULL) {
+                               iput(obj->oo_inode);
+                               obj->oo_inode = NULL;
+                       }
+                       rc = -ESTALE;
+               }
+       } else if (rc == -ENODATA) {
+               /* haven't initialize LMA xattr */
+               rc = 0;
+       }
+
+       RETURN(rc);
+}
+
 /*
  * Concurrency: no concurrent access is possible that early in object
  * life-cycle.
@@ -437,17 +503,22 @@ 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) {
+               result = osd_check_lma(env, obj);
+               if (result != 0)
+                       return result;
+
+               osd_object_init0(obj);
        }
+
        LINVRNT(osd_invariant(obj));
        return result;
 }
@@ -525,8 +596,7 @@ 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)
 {
@@ -597,12 +667,8 @@ static int osd_param_is_not_sane(const struct osd_device *dev,
 /*
  * 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;
@@ -659,6 +725,14 @@ 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,
+                                       sizeof(oti->oti_declare_ops));
+               memset(oti->oti_declare_ops_rb, 0,
+                                       sizeof(oti->oti_declare_ops_rb));
+               memset(oti->oti_declare_ops_cred, 0,
+                                       sizeof(oti->oti_declare_ops_cred));
+               oti->oti_rollback = false;
         }
         RETURN(th);
 }
@@ -695,24 +769,35 @@ int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                      LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
                      oh->ot_credits,
                      osd_journal(dev)->j_max_transaction_buffers);
-#ifdef OSD_TRACK_DECLARES
                CWARN("  create: %u/%u, delete: %u/%u, destroy: %u/%u\n",
-                     oh->ot_declare_create, oh->ot_declare_create_cred,
-                     oh->ot_declare_delete, oh->ot_declare_delete_cred,
-                     oh->ot_declare_destroy, oh->ot_declare_destroy_cred);
+                     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",
-                     oh->ot_declare_attr_set, oh->ot_declare_attr_set_cred,
-                     oh->ot_declare_xattr_set, oh->ot_declare_xattr_set_cred);
+                     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",
-                     oh->ot_declare_write, oh->ot_declare_write_cred,
-                     oh->ot_declare_punch, oh->ot_declare_punch_cred,
-                     oh->ot_declare_quota, oh->ot_declare_quota_cred);
+                     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",
-                     oh->ot_declare_insert, oh->ot_declare_insert_cred,
-                     oh->ot_declare_delete, oh->ot_declare_destroy_cred);
+                     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",
-                     oh->ot_declare_ref_add, oh->ot_declare_ref_add_cred,
-                     oh->ot_declare_ref_del, oh->ot_declare_ref_del_cred);
+                     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)) {
@@ -720,7 +805,6 @@ int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                        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.
@@ -782,7 +866,7 @@ static int osd_trans_stop(const struct lu_env *env, struct thandle *th)
                  * 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);
@@ -925,7 +1009,7 @@ 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);
@@ -937,9 +1021,9 @@ int osd_statfs(const struct lu_env *env, struct dt_device *d,
                }
        }
 
-        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);
@@ -999,19 +1083,6 @@ 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.
  */
@@ -1049,14 +1120,31 @@ 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;
 
+#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);
 }
 
 /*
@@ -1155,7 +1243,7 @@ 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++;
@@ -1170,7 +1258,7 @@ 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;
@@ -1187,7 +1275,7 @@ 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,
@@ -1202,7 +1290,7 @@ 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,
@@ -1241,14 +1329,14 @@ 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");
@@ -1333,7 +1421,8 @@ 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);
@@ -1357,16 +1446,16 @@ 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,
@@ -1392,8 +1481,8 @@ static int osd_declare_attr_set(const struct lu_env *env,
        oh = container_of0(handle, struct osd_thandle, ot_super);
        LASSERT(oh->ot_handle == NULL);
 
-       OSD_DECLARE_OP(oh, attr_set,
-                      osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
+       osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
+                            osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
 
        if (attr == NULL || obj->oo_inode == NULL)
                RETURN(rc);
@@ -1516,8 +1605,6 @@ 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)
@@ -1592,13 +1679,38 @@ 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;
        ll_vfs_dq_init(inode);
@@ -1607,12 +1719,12 @@ static int osd_attr_set(const struct lu_env *env,
        if (rc)
                return rc;
 
-        cfs_spin_lock(&obj->oo_guard);
-        rc = osd_inode_setattr(env, inode, attr);
-        cfs_spin_unlock(&obj->oo_guard);
+       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;
 }
 
@@ -1659,7 +1771,10 @@ static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
                  * 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 {
@@ -1776,7 +1891,8 @@ 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;
@@ -1860,7 +1976,7 @@ 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;
@@ -1897,7 +2013,7 @@ static int __osd_object_create(struct osd_thread_info *info,
        /* restore previous umask value */
        current->fs->umask = umask;
 
-        return result;
+       return result;
 }
 
 /**
@@ -1918,6 +2034,40 @@ static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
        return osd_oi_insert(info, osd, fid, id, th);
 }
 
+int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
+                  const struct lu_fid *fid, struct lu_seq_range *range)
+{
+       struct seq_server_site  *ss = osd_seq_site(osd);
+       int                     rc;
+
+       if (fid_is_idif(fid)) {
+               fld_range_set_ost(range);
+               range->lsr_index = fid_idif_ost_idx(fid);
+               return 0;
+       }
+
+       if (!fid_seq_in_fldb(fid_seq(fid))) {
+               fld_range_set_mdt(range);
+               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;
+       }
+
+       LASSERT(ss != NULL);
+       fld_range_set_any(range);
+       rc = fld_server_lookup(env, ss->ss_server_fld, fid_seq(fid), range);
+       if (rc != 0) {
+               CERROR("%s: cannot find FLD range for "DFID": rc = %d\n",
+                      osd_name(osd), PFID(fid), rc);
+       }
+       return rc;
+}
+
+/*
+ * 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,
@@ -1925,6 +2075,7 @@ static int osd_declare_object_create(const struct lu_env *env,
                                     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;
@@ -1934,24 +2085,24 @@ static int osd_declare_object_create(const struct lu_env *env,
        oh = container_of0(handle, struct osd_thandle, ot_super);
        LASSERT(oh->ot_handle == NULL);
 
-       OSD_DECLARE_OP(oh, create, osd_dto_credits_noquota[DTO_OBJECT_CREATE]);
-       /* XXX: So far, only normal fid needs be inserted into the oi,
-        *      things could be changed later. Revise following code then. */
-       if (fid_is_norm(lu_object_fid(&dt->do_lu))) {
+       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_DECLARE_OP(oh, 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);
+
        /* If this is directory, then we expect . and .. to be inserted as
         * well. The one directory block always needs to be created for the
         * directory, so we could use DTO_WRITE_BASE here (GDT, block bitmap,
         * block), there is no danger of needing a tree for the first block.
         */
        if (attr && S_ISDIR(attr->la_mode)) {
-               OSD_DECLARE_OP(oh, insert,
-                              osd_dto_credits_noquota[DTO_WRITE_BASE]);
-               OSD_DECLARE_OP(oh, insert, 0);
+               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)
@@ -1959,6 +2110,19 @@ static int osd_declare_object_create(const struct lu_env *env,
 
        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);
 }
 
@@ -1976,7 +2140,7 @@ 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);
 
@@ -1985,13 +2149,16 @@ 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);
 }
@@ -2015,14 +2182,12 @@ static int osd_declare_object_destroy(const struct lu_env *env,
        LASSERT(oh->ot_handle == NULL);
        LASSERT(inode);
 
-       OSD_DECLARE_OP(oh, delete, osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
-       /* XXX: So far, only normal fid needs to be inserted into the OI,
-        *      so only normal fid needs to be removed from the OI also.
-        * Recycle idle OI leaf may cause additional three OI blocks
+       osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
+                            osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
+       /* Recycle idle OI leaf may cause additional three OI blocks
         * to be changed. */
-       OSD_DECLARE_OP(oh, destroy, fid_is_norm(lu_object_fid(&dt->do_lu)) ?
-                       osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3 : 0);
-
+       osd_trans_declare_op(env, oh, OSD_OT_DELETE,
+                            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);
@@ -2054,24 +2219,24 @@ static int osd_object_destroy(const struct lu_env *env,
        if (unlikely(fid_is_acct(fid)))
                RETURN(-EPERM);
 
-       /* Parallel control for OI scrub. For most of cases, there is no
-        * lock contention. So it will not affect unlink performance. */
-       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);
+               LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1);
+               /* it will check/delete the inode from remote parent,
+                * how to optimize it? unlink performance impaction XXX */
+               result = osd_delete_from_remote_parent(env, osd, obj, oh);
+               if (result != 0 && result != -ENOENT) {
+                       CERROR("%s: delete inode "DFID": rc = %d\n",
+                              osd_name(osd), PFID(fid), result);
+               }
+               spin_lock(&obj->oo_guard);
                clear_nlink(inode);
-               cfs_spin_unlock(&obj->oo_guard);
-               inode->i_sb->s_op->dirty_inode(inode);
-       } else {
-               LASSERT(osd_inode_unlinked(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);
 
         /* XXX: add to ext3 orphan list */
         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
@@ -2083,35 +2248,6 @@ static int osd_object_destroy(const struct lu_env *env,
 }
 
 /**
- * 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;
-
-       ll_vfs_dq_init(inode);
-        dentry->d_inode = inode;
-        rc = inode->i_op->setxattr(dentry, name, buf->lb_buf,
-                                   buf->lb_len, fs_flags);
-        return rc;
-}
-
-/**
  * Put the fid into lustre_mdt_attrs, and then place the structure
  * inode's ea. This fid should not be altered during the life time
  * of the inode.
@@ -2121,18 +2257,24 @@ 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, __u64 flags)
 {
-        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;
+
+       lustre_lma_init(lma, fid, flags);
+       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;
 }
 
 /**
@@ -2144,18 +2286,21 @@ 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_namespace_visible((const struct lu_fid *)fid) ||
+           OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
+               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.
  *
@@ -2178,6 +2323,103 @@ 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 agent inode for remote entry
+ */
+static struct inode *osd_create_local_agent_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);
+       }
+
+       /* Set special LMA flag for local agent inode */
+       rc = osd_ea_fid_set(info, local, fid, LMAI_AGENT);
+       if (rc != 0) {
+               CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
+                      osd_name(osd), PFID(fid), rc);
+               RETURN(ERR_PTR(rc));
+       }
+
+       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 agent inode for remote entry
+ */
+static int osd_delete_local_agent_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
@@ -2200,7 +2442,7 @@ 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);
 
@@ -2209,17 +2451,18 @@ 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)
+               result = osd_ea_fid_set(info, obj->oo_inode, fid, 0);
 
-        if (result == 0)
-                result = __osd_oi_insert(env, obj, fid, 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)));
         LINVRNT(osd_invariant(obj));
         RETURN(result);
 }
@@ -2228,7 +2471,7 @@ 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);
@@ -2236,7 +2479,8 @@ 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, 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;
 }
@@ -2247,43 +2491,56 @@ static int osd_declare_object_ref_add(const struct lu_env *env,
 static int osd_object_ref_add(const struct lu_env *env,
                               struct dt_object *dt, struct thandle *th)
 {
-        struct osd_object *obj = osd_dt_obj(dt);
-        struct inode      *inode = obj->oo_inode;
+       struct osd_object *obj = osd_dt_obj(dt);
+       struct inode      *inode = obj->oo_inode;
+       bool               need_dirty = false;
+       int                rc = 0;
 
         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.
+       /* This based on ldiskfs_inc_count(), which is not exported.
+        *
+        * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
+        * (65000) subdirectories by storing "1" in i_nlink if the link count
+        * would otherwise overflow. Directory tranversal tools understand
+        * that (st_nlink == 1) indicates that the filesystem dose not track
+        * hard links count on the directory, and will not abort subdirectory
+        * scanning early once (st_nlink - 2) subdirs have been found.
         *
-        * 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.
+        * This also has to properly handle the case of inodes with nlink == 0
+        * in case they are being linked into the PENDING directory
         */
-       cfs_spin_lock(&obj->oo_guard);
-       /* inc_nlink from 0 may cause WARN_ON */
-       if(inode->i_nlink == 0)
+       spin_lock(&obj->oo_guard);
+       if (unlikely(!S_ISDIR(inode->i_mode) &&
+                    inode->i_nlink >= LDISKFS_LINK_MAX)) {
+               /* MDD should have checked this, but good to be safe */
+               rc = -EMLINK;
+       } else if (unlikely(inode->i_nlink == 0 ||
+                           (S_ISDIR(inode->i_mode) &&
+                            inode->i_nlink >= LDISKFS_LINK_MAX))) {
+               /* inc_nlink from 0 may cause WARN_ON */
                set_nlink(inode, 1);
-       else
+               need_dirty = true;
+       } else if (!S_ISDIR(inode->i_mode) ||
+                  (S_ISDIR(inode->i_mode) && inode->i_nlink >= 2)) {
                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);
-       }
+               need_dirty = true;
+       } /* else (S_ISDIR(inode->i_mode) && 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);
+       spin_unlock(&obj->oo_guard);
+
+       if (need_dirty)
+               ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+
        LINVRNT(osd_invariant(obj));
 
-       return 0;
+       return rc;
 }
 
 static int osd_declare_object_ref_del(const struct lu_env *env,
@@ -2292,13 +2549,14 @@ 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, 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;
 }
@@ -2313,23 +2571,32 @@ 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);
+       osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
 
-       cfs_spin_lock(&obj->oo_guard);
+       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);
-       cfs_spin_unlock(&obj->oo_guard);
-       inode->i_sb->s_op->dirty_inode(inode);
-       LINVRNT(osd_invariant(obj));
+
+       /* This based on ldiskfs_dec_count(), which is not exported.
+        *
+        * If a directory already has nlink == 1, then do not drop the nlink
+        * count to 0, even temporarily, to avoid race conditions with other
+        * threads not holding oo_guard seeing i_nlink == 0 in rare cases.
+        *
+        * nlink == 1 means the directory has/had > EXT4_LINK_MAX subdirs.
+        * */
+       if (!S_ISDIR(inode->i_mode) || inode->i_nlink > 1) {
+               drop_nlink(inode);
+
+               spin_unlock(&obj->oo_guard);
+               ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+               LINVRNT(osd_invariant(obj));
+       } else {
+               spin_unlock(&obj->oo_guard);
+       }
 
        return 0;
 }
@@ -2369,14 +2636,13 @@ 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);
 
         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);
 }
 
 
@@ -2392,9 +2658,10 @@ static int osd_declare_xattr_set(const struct lu_env *env,
        oh = container_of0(handle, struct osd_thandle, ot_super);
        LASSERT(oh->ot_handle == NULL);
 
-       OSD_DECLARE_OP(oh, xattr_set, strcmp(name, XATTR_NAME_VERSION) == 0 ?
-                      osd_dto_credits_noquota[DTO_ATTR_SET_BASE] :
-                      osd_dto_credits_noquota[DTO_XATTR_SET]);
+       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;
 }
@@ -2414,7 +2681,7 @@ 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);
 }
 
 /*
@@ -2424,6 +2691,12 @@ 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 */
@@ -2438,8 +2711,15 @@ 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);
 }
 
 /*
@@ -2453,7 +2733,7 @@ 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));
 
@@ -2461,6 +2741,7 @@ static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
                 return -EACCES;
 
         dentry->d_inode = inode;
+       dentry->d_sb = inode->i_sb;
         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
 }
 
@@ -2470,13 +2751,14 @@ 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, 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;
 }
@@ -2494,18 +2776,18 @@ 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;
+       dentry->d_sb = inode->i_sb;
         rc = inode->i_op->removexattr(dentry, name);
         return rc;
 }
@@ -2529,7 +2811,7 @@ 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 */
@@ -2580,9 +2862,9 @@ 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;
@@ -2609,12 +2891,17 @@ static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
        ENTRY;
 
        dentry->d_inode = inode;
+       dentry->d_sb = inode->i_sb;
        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);
 }
 
@@ -2694,14 +2981,13 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
        struct osd_object       *obj = osd_dt_obj(dt);
 
         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) {
                 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;
@@ -2709,7 +2995,7 @@ 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;
@@ -2719,28 +3005,28 @@ 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;
                 }
@@ -2754,7 +3040,8 @@ static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
         }
         LINVRNT(osd_invariant(obj));
 
-       if (is_quota_glb_feat(feat))
+       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;
@@ -2848,7 +3135,8 @@ 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, 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;
 }
@@ -2880,14 +3168,14 @@ static int osd_index_iam_delete(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(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))
@@ -2919,13 +3207,14 @@ static int osd_index_declare_ea_delete(const struct lu_env *env,
        int                 rc;
        ENTRY;
 
-       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, delete, osd_dto_credits_noquota[DTO_INDEX_DELETE]);
+       osd_trans_declare_op(env, oh, OSD_OT_DELETE,
+                            osd_dto_credits_noquota[DTO_INDEX_DELETE]);
 
        inode = osd_dt_obj(dt)->oo_inode;
        LASSERT(inode);
@@ -2945,7 +3234,29 @@ 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);
 }
 
 /**
@@ -2967,18 +3278,19 @@ 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);
@@ -2996,21 +3308,108 @@ 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);
+        bh = ldiskfs_find_entry(dir, &dentry->d_name, &de, hlock);
         if (bh) {
-                rc = ldiskfs_delete_entry(oh->ot_handle,
-                                          dir, de, bh);
+               __u32 ino = 0;
+
+               /* If this is not the ".." entry, it might be a remote DNE
+                * entry and  we need to check if the FID is for a remote
+                * MDT.  If the FID is  not in the directory entry (e.g.
+                * upgraded 1.8 filesystem without dirdata enabled) then
+                * we need to get the FID from the LMA. For a remote directory
+                * there HAS to be an LMA, it cannot be an IGIF inode in this
+                * case.
+                *
+                * Delete the entry before the agent inode in order to
+                * simplify error handling.  At worst an error after deleting
+                * the entry first might leak the agent inode afterward. The
+                * reverse would need filesystem abort in case of error deleting
+                * the entry after the agent had been removed, or leave a
+                * dangling entry pointing at a random inode. */
+               if (strcmp((char *)key, dotdot) != 0) {
+                       LASSERT(de != NULL);
+                       rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
+                       /* If Fid is not in dentry, try to get it from LMA */
+                       if (rc == -ENODATA) {
+                               struct osd_inode_id *id;
+                               struct inode *inode;
+
+                               /* Before trying to get fid from the inode,
+                                * check whether the inode is valid.
+                                *
+                                * If the inode has been deleted, do not go
+                                * ahead to do osd_ea_fid_get, which will set
+                                * the inode to bad inode, which might cause
+                                * the inode to be deleted uncorrectly */
+                               inode = ldiskfs_iget(osd_sb(osd),
+                                                    le32_to_cpu(de->inode));
+                               if (IS_ERR(inode)) {
+                                       CDEBUG(D_INODE, "%s: "DFID"get inode"
+                                              "error.\n", osd_name(osd),
+                                              PFID(fid));
+                                       rc = PTR_ERR(inode);
+                               } else {
+                                       if (likely(inode->i_nlink != 0)) {
+                                               id = &osd_oti_get(env)->oti_id;
+                                               rc = osd_ea_fid_get(env, obj,
+                                                       le32_to_cpu(de->inode),
+                                                                   fid, id);
+                                       } else {
+                                               CDEBUG(D_INFO, "%s: %u "DFID
+                                                      "deleted.\n",
+                                                      osd_name(osd),
+                                                      le32_to_cpu(de->inode),
+                                                      PFID(fid));
+                                               rc = -ESTALE;
+                                       }
+                                       iput(inode);
+                               }
+                       }
+                       if (rc == 0 &&
+                           unlikely(osd_remote_fid(env, osd, fid)))
+                               /* Need to delete agent inode */
+                               ino = le32_to_cpu(de->inode);
+               }
+                rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
                 brelse(bh);
+               if (rc == 0 && unlikely(ino != 0)) {
+                       rc = osd_delete_local_agent_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 {
                 rc = -ENOENT;
         }
         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, Check whether it needs to delete
+        * from agent directory */
+       if (unlikely(strcmp((char *)key, dotdot) == 0)) {
+               rc = osd_delete_from_remote_parent(env, osd_obj2dev(obj), obj,
+                                                  oh);
+               if (rc != 0 && rc != -ENOENT) {
+                       CERROR("%s: delete agent inode "DFID": rc = %d\n",
+                              osd_name(osd), PFID(fid), rc);
+               }
+
+               if (rc == -ENOENT)
+                       rc = 0;
+
+               GOTO(out, rc);
+       }
+out:
 
         LASSERT(osd_invariant(obj));
         RETURN(rc);
@@ -3042,7 +3441,7 @@ 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))
@@ -3094,13 +3493,13 @@ 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, 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;
 }
@@ -3132,14 +3531,14 @@ static int osd_index_iam_insert(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(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))
@@ -3190,27 +3589,20 @@ 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);
-
-        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;
-        }
        LASSERT(pobj->oo_inode);
+
+       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);
+       rc = osd_ldiskfs_add_entry(oth->ot_handle, child, cinode, hlock);
 
-        RETURN(rc);
+       RETURN(rc);
 }
 
 /**
@@ -3233,8 +3625,6 @@ 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;
 
@@ -3250,32 +3640,23 @@ 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;
 }
 
 
@@ -3299,7 +3680,7 @@ 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),
@@ -3309,16 +3690,26 @@ 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;
 }
@@ -3338,7 +3729,7 @@ osd_consistency_check(struct osd_thread_info *oti, struct osd_device *dev,
                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_EXIT;
 
@@ -3372,6 +3763,44 @@ again:
        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;
+}
+
+static int osd_add_oi_cache(struct osd_thread_info *info,
+                           struct osd_device *osd,
+                           struct osd_inode_id *id,
+                           struct lu_fid *fid)
+{
+       CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
+              id->oii_ino, id->oii_gen, info);
+       info->oti_cache.oic_lid = *id;
+       info->oti_cache.oic_fid = *fid;
+
+       return 0;
+}
+
 /**
  * Calls ->lookup() to find dentry. From dentry get inode and
  * read inode's ea to get fid. This is required for  interoperability
@@ -3391,6 +3820,7 @@ 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);
 
@@ -3402,34 +3832,45 @@ 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) {
+                       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_fid = *fid;
+               rc = osd_add_oi_cache(osd_oti_get(env), osd_obj2dev(obj), id,
+                                     fid);
+               if (rc != 0)
+                       GOTO(out, rc);
                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)))
                        osd_consistency_check(oti, dev, oic);
@@ -3443,7 +3884,7 @@ 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;
 }
 
@@ -3520,27 +3961,55 @@ static int osd_index_declare_ea_insert(const struct lu_env *env,
                                       const struct dt_key *key,
                                       struct thandle *handle)
 {
-       struct osd_thandle *oh;
-       struct inode       *inode;
-       int                 rc;
+       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(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, insert, osd_dto_credits_noquota[DTO_INDEX_INSERT]);
+       osd_trans_declare_op(env, oh, OSD_OT_INSERT,
+                            osd_dto_credits_noquota[DTO_INDEX_INSERT]);
 
-       inode = osd_dt_obj(dt)->oo_inode;
-       LASSERT(inode);
+       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;
+
+               /* 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);
+       }
+
+       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);
 
-       /* We ignore block quota on meta pool (MDTs), so needn't
-        * calculate how many blocks will be consumed by this index
-        * insert */
-       rc = osd_declare_inode_qid(env, inode->i_uid, inode->i_gid, 0, oh,
-                                  true, true, NULL, false);
        RETURN(rc);
 }
 
@@ -3560,31 +4029,80 @@ 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;
-        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)) {
-                rc = osd_ea_add_rec(env, obj, child->oo_inode, name, rec, th);
-                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_remote_parent(env, osd, obj, oh);
+                       if (rc != 0) {
+                               CERROR("%s: add "DFID" error: rc = %d\n",
+                                      osd_name(osd),
+                                      PFID(lu_object_fid(&dt->do_lu)), rc);
+                               RETURN(rc);
+                       }
+
+                       child_inode = igrab(omm->omm_remote_parent->d_inode);
+               } else {
+                       child_inode = osd_create_local_agent_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);
 }
 
 /**
@@ -3667,7 +4185,6 @@ 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;
@@ -3726,44 +4243,42 @@ 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 (attr & LUDA_TYPE) {
-                        len = (len + align) & ~align;
+       /* check if file type is required */
+       if (ent->lde_attrs & LUDA_TYPE) {
+               struct luda_type *lt;
+               int align = sizeof(*lt) - 1;
 
-                        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);
 }
 
 /**
@@ -3881,6 +4396,7 @@ static struct dt_it *osd_it_ea_init(const struct lu_env *env,
         struct osd_object       *obj  = osd_dt_obj(dt);
         struct osd_thread_info  *info = osd_oti_get(env);
         struct osd_it_ea        *it   = &info->oti_it_ea;
+       struct file             *file = &it->oie_file;
         struct lu_object        *lo   = &dt->do_lu;
         struct dentry           *obj_dentry = &info->oti_it_dentry;
         ENTRY;
@@ -3895,17 +4411,20 @@ static struct dt_it *osd_it_ea_init(const struct lu_env *env,
         it->oie_dirent          = NULL;
         it->oie_buf             = info->oti_it_ea_buf;
         it->oie_obj             = obj;
-        it->oie_file.f_pos      = 0;
-        it->oie_file.f_dentry   = obj_dentry;
-        if (attr & LUDA_64BITHASH)
-               it->oie_file.f_mode |= FMODE_64BITHASH;
-        else
-               it->oie_file.f_mode |= FMODE_32BITHASH;
-        it->oie_file.f_mapping    = obj->oo_inode->i_mapping;
-        it->oie_file.f_op         = obj->oo_inode->i_fop;
-        it->oie_file.private_data = NULL;
-        lu_object_get(lo);
-        RETURN((struct dt_it *) it);
+
+       /* Reset the "file" totally to avoid to reuse any old value from
+        * former readdir handling, the "file->f_pos" should be zero. */
+       memset(file, 0, sizeof(*file));
+       /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
+       if (attr & LUDA_64BITHASH)
+               file->f_mode    = FMODE_64BITHASH;
+       else
+               file->f_mode    = FMODE_32BITHASH;
+       file->f_dentry          = obj_dentry;
+       file->f_mapping         = obj->oo_inode->i_mapping;
+       file->f_op              = obj->oo_inode->i_fop;
+       lu_object_get(lo);
+       RETURN((struct dt_it *) it);
 }
 
 /**
@@ -3973,6 +4492,7 @@ 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;
@@ -3988,16 +4508,23 @@ 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;
@@ -4038,7 +4565,7 @@ 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,
@@ -4047,7 +4574,7 @@ 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;
@@ -4123,10 +4650,365 @@ 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 inline int
+osd_dot_dotdot_has_space(struct ldiskfs_dir_entry_2 *de, int dot_dotdot)
+{
+       LASSERTF(dot_dotdot == 1 || dot_dotdot == 2,
+                "dot_dotdot = %d\n", dot_dotdot);
+
+       if (LDISKFS_DIR_REC_LEN(de) >=
+           __LDISKFS_DIR_REC_LEN(dot_dotdot + 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;
+       int                         dot_dotdot  = 0;
+       bool                        dirty       = false;
+       ENTRY;
+
+       if (ent->oied_name[0] == '.') {
+               if (ent->oied_namelen == 1)
+                       dot_dotdot = 1;
+               else if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
+                       dot_dotdot = 2;
+       }
+
+       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;
+                       /* "0" means exclusive lock for the whole directory.
+                        * We need to prevent others access such name entry
+                        * during the delete + insert. Neither HLOCK_ADD nor
+                        * HLOCK_DEL cannot guarantee the atomicity. */
+                       ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
+               } else {
+                       down_write(&obj->oo_ext_idx_sem);
+               }
+       } else {
+               if (obj->oo_hl_head != NULL) {
+                       hlock = osd_oti_get(env)->oti_hlock;
+                       ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
+                                          LDISKFS_HLOCK_LOOKUP);
+               } else {
+                       down_read(&obj->oo_ext_idx_sem);
+               }
+       }
+
+       bh = osd_ldiskfs_find_entry(dir, dentry, &de, hlock);
+       /* For dot/dotdot entry, if there is not enough space to hold the
+        * FID-in-dirent, just keep them there. It only happens when the
+        * device upgraded from 1.8 or restored from MDT file-level backup.
+        * For the whole directory, only dot/dotdot entry have 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) ||
+           (dot_dotdot != 0 && !osd_dot_dotdot_has_space(de, dot_dotdot))) {
+               *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_read(&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) {
+                               *fid = lma->lma_self_fid;
+                               *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_read(&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 {
+                               lu_igif_build(fid, inode->i_ino,
+                                             inode->i_generation);
+                               *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_read(&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, 0);
+                       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 {
+               if (dev->od_dirent_journal)
+                       up_write(&obj->oo_ext_idx_sem);
+               else
+                       up_read(&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.
@@ -4145,6 +5027,7 @@ 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;
@@ -4152,23 +5035,46 @@ 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) {
-                       fid_zero(&oic->oic_fid);
-                       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);
-       oic->oic_fid = *fid;
-       if ((scrub->os_pos_current <= ino) &&
-           (sf->sf_flags & SF_INCONSISTENT ||
+
+       if (osd_remote_fid(env, dev, fid))
+               RETURN(0);
+
+       if (likely(!(attr & LUDA_IGNORE)))
+               rc = osd_add_oi_cache(oti, dev, id, 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)))
                osd_consistency_check(oti, dev, oic);
 
@@ -4300,12 +5206,14 @@ 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,
@@ -4334,7 +5242,9 @@ 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);
 }
 
@@ -4342,20 +5252,33 @@ static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
 {
        ENTRY;
 
-       osd_scrub_cleanup(env, o);
+       /* shutdown quota slave instance associated with the device */
+       if (o->od_quota_slave != NULL) {
+               qsd_fini(env, o->od_quota_slave);
+               o->od_quota_slave = NULL;
+       }
+
+       RETURN(0);
+}
+
+static void osd_umount(const struct lu_env *env, struct osd_device *o)
+{
+       ENTRY;
 
        if (o->od_fsops) {
                fsfilt_put_ops(o->od_fsops);
                o->od_fsops = NULL;
        }
 
-       /* shutdown quota slave instance associated with the device */
-       if (o->od_quota_slave != NULL) {
-               qsd_fini(env, o->od_quota_slave);
-               o->od_quota_slave = NULL;
+       if (o->od_mnt != NULL) {
+               shrink_dcache_sb(osd_sb(o));
+               osd_sync(env, &o->od_dt_dev);
+
+               mntput(o->od_mnt);
+               o->od_mnt = NULL;
        }
 
-       RETURN(0);
+       EXIT;
 }
 
 static int osd_mount(const struct lu_env *env,
@@ -4375,6 +5298,10 @@ static int osd_mount(const struct lu_env *env,
        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");
@@ -4420,13 +5347,15 @@ static int osd_mount(const struct lu_env *env,
                GOTO(out, rc);
        }
 
-       if (lvfs_check_rdonly(o->od_mnt->mnt_sb->s_bdev)) {
+#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)) {
@@ -4436,6 +5365,8 @@ static int osd_mount(const struct lu_env *env,
                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;
 
@@ -4449,30 +5380,18 @@ out:
 }
 
 static struct lu_device *osd_device_fini(const struct lu_env *env,
-                                         struct lu_device *d)
+                                        struct lu_device *d)
 {
-        int rc;
-        ENTRY;
-
-       rc = osd_shutdown(env, osd_dev(d));
-
-        osd_compat_fini(osd_dev(d));
-
-        shrink_dcache_sb(osd_sb(osd_dev(d)));
-        osd_sync(env, lu2dt_dev(d));
-
-        rc = osd_procfs_fini(osd_dev(d));
-        if (rc) {
-                CERROR("proc fini error %d \n", rc);
-                RETURN (ERR_PTR(rc));
-        }
+       struct osd_device *o = osd_dev(d);
+       ENTRY;
 
-       if (osd_dev(d)->od_mnt) {
-               mntput(osd_dev(d)->od_mnt);
-               osd_dev(d)->od_mnt = NULL;
-       }
+       osd_procfs_fini(o);
+       osd_shutdown(env, o);
+       osd_scrub_cleanup(env, o);
+       osd_obj_map_fini(o);
+       osd_umount(env, o);
 
-        RETURN(NULL);
+       RETURN(NULL);
 }
 
 static int osd_device_init0(const struct lu_env *env,
@@ -4482,6 +5401,7 @@ static int osd_device_init0(const struct lu_env *env,
        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);
@@ -4493,8 +5413,8 @@ static int osd_device_init0(const struct lu_env *env,
        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);
+       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();
@@ -4509,32 +5429,37 @@ static int osd_device_init0(const struct lu_env *env,
        if (rc)
                GOTO(out_capa, rc);
 
-       /* setup scrub, including OI files initialization */
-       rc = osd_scrub_setup(env, o);
-       if (rc < 0)
+       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);
+       }
 
-       strncpy(o->od_svname, lustre_cfg_string(cfg, 4),
-                       sizeof(o->od_svname) - 1);
-
-       rc = osd_compat_init(o);
+       rc = osd_obj_map_init(env, o);
        if (rc != 0)
-               GOTO(out_scrub, rc);
+               GOTO(out_mnt, rc);
 
        rc = lu_site_init(&o->od_site, l);
-       if (rc)
+       if (rc != 0)
                GOTO(out_compat, rc);
        o->od_site.ls_bottom_dev = l;
 
        rc = lu_site_init_finish(&o->od_site);
-       if (rc)
+       if (rc != 0)
+               GOTO(out_site, 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_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);
+               GOTO(out_scrub, rc);
        }
 
        LASSERT(l->ld_site->ls_linkage.next && l->ld_site->ls_linkage.prev);
@@ -4549,23 +5474,21 @@ static int osd_device_init0(const struct lu_env *env,
        }
 
        RETURN(0);
+
 out_procfs:
        osd_procfs_fini(o);
+out_scrub:
+       osd_scrub_cleanup(env, o);
 out_site:
        lu_site_fini(&o->od_site);
 out_compat:
-       osd_compat_fini(o);
-out_scrub:
-       osd_scrub_cleanup(env, o);
+       osd_obj_map_fini(o);
 out_mnt:
-       osd_oi_fini(info, o);
-       osd_shutdown(env, o);
-       mntput(o->od_mnt);
-       o->od_mnt = NULL;
+       osd_umount(env, o);
 out_capa:
        cleanup_capa_hash(o->od_capa_hash);
 out:
-       RETURN(rc);
+       return rc;
 }
 
 static struct lu_device *osd_device_alloc(const struct lu_env *env,
@@ -4581,6 +5504,9 @@ static struct lu_device *osd_device_alloc(const struct lu_env *env,
 
        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);
@@ -4670,9 +5596,9 @@ static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
 
        *exp = class_conn2export(&conn);
 
-       cfs_spin_lock(&osd->od_osfs_lock);
+       spin_lock(&osd->od_osfs_lock);
        osd->od_connects++;
-       cfs_spin_unlock(&osd->od_osfs_lock);
+       spin_unlock(&osd->od_osfs_lock);
 
        RETURN(0);
 }
@@ -4689,11 +5615,11 @@ static int osd_obd_disconnect(struct obd_export *exp)
        ENTRY;
 
        /* Only disconnect the underlying layers on the final disconnect. */
-       cfs_spin_lock(&osd->od_osfs_lock);
+       spin_lock(&osd->od_osfs_lock);
        osd->od_connects--;
        if (osd->od_connects == 0)
                release = 1;
-       cfs_spin_unlock(&osd->od_osfs_lock);
+       spin_unlock(&osd->od_osfs_lock);
 
        rc = class_disconnect(exp); /* bz 9811 */
 
@@ -4709,15 +5635,6 @@ static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
        int                result = 0;
        ENTRY;
 
-       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 (osd->od_quota_slave != NULL)
                /* set up quota slave objects */
                result = qsd_prepare(env, osd->od_quota_slave);