Whamcloud - gitweb
LU-4482 grant: don't use cache data in osd_statfs()
[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_handler.c
index 602e4ab..3fd2e4c 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>
+/* process_config */
+#include <lustre_param.h>
 
 #include "osd_internal.h"
-#include "osd_igif.h"
+#include "osd_dynlocks.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");
+
+/* Slab to allocate dynlocks */
+struct kmem_cache *dynlock_cachep;
+
+static struct lu_kmem_descr ldiskfs_caches[] = {
+       {
+               .ckd_cache = &dynlock_cachep,
+               .ckd_name  = "dynlock_cache",
+               .ckd_size  = sizeof(struct dynlock_handle)
+       },
+       {
+               .ckd_cache = NULL
+       }
+};
 
 static const char dot[] = ".";
 static const char dotdot[] = "..";
@@ -93,6 +105,21 @@ 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_UPDATE]         = OSD_OT_MAX,
+       [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 +179,36 @@ 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)
+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;
@@ -203,8 +231,8 @@ struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
                       id->oii_ino, PTR_ERR(inode));
        } else if (id->oii_gen != OSD_OII_NOGEN &&
                   inode->i_generation != id->oii_gen) {
-               CDEBUG(D_INODE, "unmatched inode: ino = %u, gen0 = %u, "
-                      "gen1 = %u\n",
+               CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
+                      "i_generation = %u\n",
                       id->oii_ino, id->oii_gen, inode->i_generation);
                iput(inode);
                inode = ERR_PTR(-ESTALE);
@@ -212,7 +240,6 @@ struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
                /* due to parallel readdir and unlink,
                * we can have dead inode here. */
                CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
-               make_bad_inode(inode);
                iput(inode);
                inode = ERR_PTR(-ESTALE);
        } else if (is_bad_inode(inode)) {
@@ -235,8 +262,9 @@ 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 +274,14 @@ 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);
@@ -258,37 +289,260 @@ struct inode *osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
        return inode;
 }
 
-static struct inode *
-osd_iget_verify(struct osd_thread_info *info, struct osd_device *dev,
-               struct osd_inode_id *id, const struct lu_fid *fid)
+static struct inode *osd_iget_check(struct osd_thread_info *info,
+                                   struct osd_device *dev,
+                                   const struct lu_fid *fid,
+                                   struct osd_inode_id *id,
+                                   bool in_oi)
 {
-       struct lustre_mdt_attrs *lma   = &info->oti_mdt_attrs;
-       struct inode            *inode;
-       int                      rc;
+       struct inode    *inode;
+       int              rc     = 0;
+       ENTRY;
 
-       inode = osd_iget(info, dev, id);
-       if (IS_ERR(inode))
-               return inode;
+       inode = ldiskfs_iget(osd_sb(dev), id->oii_ino);
+       if (IS_ERR(inode)) {
+               rc = PTR_ERR(inode);
+               if (!in_oi || (rc != -ENOENT && rc != -ESTALE)) {
+                       CDEBUG(D_INODE, "no inode: ino = %u, rc = %d\n",
+                              id->oii_ino, rc);
 
-       rc = osd_get_lma(inode, &info->oti_obj_dentry, lma);
-       if (rc == -ENODATA)
-               return inode;
+                       GOTO(put, rc);
+               }
+
+               goto check_oi;
+       }
+
+       if (is_bad_inode(inode)) {
+               rc = -ENOENT;
+               if (!in_oi) {
+                       CDEBUG(D_INODE, "bad inode: ino = %u\n", id->oii_ino);
+
+                       GOTO(put, rc);
+               }
+
+               goto check_oi;
+       }
+
+       if (id->oii_gen != OSD_OII_NOGEN &&
+           inode->i_generation != id->oii_gen) {
+               rc = -ESTALE;
+               if (!in_oi) {
+                       CDEBUG(D_INODE, "unmatched inode: ino = %u, "
+                              "oii_gen = %u, i_generation = %u\n",
+                              id->oii_ino, id->oii_gen, inode->i_generation);
+
+                       GOTO(put, rc);
+               }
+
+               goto check_oi;
+       }
+
+       if (inode->i_nlink == 0) {
+               rc = -ENOENT;
+               if (!in_oi) {
+                       CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 
+                       GOTO(put, rc);
+               }
+
+               goto check_oi;
+       }
+
+check_oi:
        if (rc != 0) {
-               iput(inode);
-               return ERR_PTR(rc);
+               LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
+
+               rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
+               /* XXX: There are some possible cases:
+                *      1. rc = 0.
+                *         Backup/restore caused the OI invalid.
+                *      2. rc = 0.
+                *         Someone unlinked the object but NOT removed
+                *         the OI mapping, such as mount target device
+                *         as ldiskfs, and modify something directly.
+                *      3. rc = -ENOENT.
+                *         Someone just removed the object between the
+                *         former oi_lookup and the iget. It is normal.
+                *      4. Other failure cases.
+                *
+                *      Generally, when the device is mounted, it will
+                *      auto check whether the system is restored from
+                *      file-level backup or not. We trust such detect
+                *      to distinguish the 1st case from the 2nd case. */
+               if (rc == 0) {
+                       if (!IS_ERR(inode) && inode->i_generation != 0 &&
+                           inode->i_generation == id->oii_gen)
+                               rc = -ENOENT;
+                       else
+                               rc = -EREMCHG;
+               }
+       } else {
+               if (id->oii_gen == OSD_OII_NOGEN)
+                       osd_id_gen(id, inode->i_ino, inode->i_generation);
+
+               /* Do not update file c/mtime in ldiskfs.
+                * NB: we don't have any lock to protect this because we don't
+                * have reference on osd_object now, but contention with
+                * another lookup + attr_set can't happen in the tiny window
+                * between if (...) and set S_NOCMTIME. */
+               if (!(inode->i_flags & S_NOCMTIME))
+                       inode->i_flags |= S_NOCMTIME;
        }
 
-       if (!lu_fid_eq(fid, &lma->lma_self_fid)) {
-               CDEBUG(D_LFSCK, "inconsistent obj: "DFID", %lu, "DFID"\n",
-                      PFID(&lma->lma_self_fid), inode->i_ino, PFID(fid));
-               iput(inode);
-               return ERR_PTR(-EREMCHG);
+       GOTO(put, rc);
+
+put:
+       if (rc != 0) {
+               if (!IS_ERR(inode))
+                       iput(inode);
+
+               inode = ERR_PTR(rc);
        }
 
        return inode;
 }
 
+/**
+ * \retval +v: new filter_fid, does not contain self-fid
+ * \retval 0:  filter_fid_old, contains self-fid
+ * \retval -v: other failure cases
+ */
+int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
+                struct dentry *dentry, struct lu_fid *fid)
+{
+       struct filter_fid_old   *ff     = &info->oti_ff;
+       struct ost_id           *ostid  = &info->oti_ostid;
+       int                      rc;
+
+       rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
+       if (rc == sizeof(*ff)) {
+               rc = 0;
+               ostid_set_seq(ostid, le64_to_cpu(ff->ff_seq));
+               ostid_set_id(ostid, le64_to_cpu(ff->ff_objid));
+               /* XXX: should use real OST index in the future. LU-3569 */
+               ostid_to_fid(fid, ostid, 0);
+       } else if (rc == sizeof(struct filter_fid)) {
+               rc = 1;
+       } else if (rc >= 0) {
+               rc = -EINVAL;
+       }
+
+       return rc;
+}
+
+static int osd_lma_self_repair(struct osd_thread_info *info,
+                              struct osd_device *osd, struct inode *inode,
+                              const struct lu_fid *fid, __u32 compat)
+{
+       handle_t *jh;
+       int       rc;
+
+       LASSERT(current->journal_info == NULL);
+
+       jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
+                                 osd_dto_credits_noquota[DTO_XATTR_SET]);
+       if (IS_ERR(jh)) {
+               rc = PTR_ERR(jh);
+               CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
+                     osd_name(osd), rc);
+               return rc;
+       }
+
+       rc = osd_ea_fid_set(info, inode, fid, compat, 0);
+       if (rc != 0)
+               CWARN("%s: cannot self repair the LMA: rc = %d\n",
+                     osd_name(osd), rc);
+       ldiskfs_journal_stop(jh);
+       return rc;
+}
+
+static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
+{
+       struct osd_thread_info  *info   = osd_oti_get(env);
+       struct osd_device       *osd    = osd_obj2dev(obj);
+       struct lustre_mdt_attrs *lma    = &info->oti_mdt_attrs;
+       struct inode            *inode  = obj->oo_inode;
+       struct dentry           *dentry = &info->oti_obj_dentry;
+       struct lu_fid           *fid    = NULL;
+       const struct lu_fid     *rfid   = lu_object_fid(&obj->oo_dt.do_lu);
+       int                      rc;
+       ENTRY;
+
+       if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
+               RETURN(0);
+
+       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 == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
+               fid = &lma->lma_self_fid;
+               rc = osd_get_idif(info, inode, dentry, fid);
+               if ((rc > 0) || (rc == -ENODATA && osd->od_lma_self_repair)) {
+                       /* For the given OST-object, if it has neither LMA nor
+                        * FID in XATTR_NAME_FID, then the given FID (which is
+                        * contained in the @obj, from client RPC for locating
+                        * the OST-object) is trusted. We use it to generate
+                        * the LMA. */
+                       osd_lma_self_repair(info, osd, inode, rfid,
+                               fid_is_on_ost(info, osd, fid, OI_CHECK_FLD) ?
+                               LMAC_FID_ON_OST : 0);
+                       RETURN(0);
+               }
+       }
+
+       if (unlikely(rc == -ENODATA))
+               RETURN(0);
+
+       if (rc < 0)
+               RETURN(rc);
+
+       if (rc > 0) {
+               rc = 0;
+               lustre_lma_swab(lma);
+               if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
+                            CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
+                       CWARN("%s: unsupported incompat LMA feature(s) %#x for "
+                             "fid = "DFID", ino = %lu\n", osd_name(osd),
+                             lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
+                             PFID(rfid), inode->i_ino);
+                       rc = -EOPNOTSUPP;
+               } else if (!(lma->lma_compat & LMAC_NOT_IN_OI)) {
+                       fid = &lma->lma_self_fid;
+               }
+       }
+
+       if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
+               if (fid_is_idif(rfid) && fid_is_idif(fid)) {
+                       struct ost_id   *oi   = &info->oti_ostid;
+                       struct lu_fid   *fid1 = &info->oti_fid3;
+                       __u32            idx  = fid_idif_ost_idx(rfid);
+
+                       /* For old IDIF, the OST index is not part of the IDIF,
+                        * Means that different OSTs may have the same IDIFs.
+                        * Under such case, we need to make some compatible
+                        * check to make sure to trigger OI scrub properly. */
+                       if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
+                               /* Given @rfid is new, LMA is old. */
+                               fid_to_ostid(fid, oi);
+                               ostid_to_fid(fid1, oi, idx);
+                               if (lu_fid_eq(fid1, rfid)) {
+                                       if (osd->od_lma_self_repair)
+                                               osd_lma_self_repair(info, osd,
+                                                       inode, rfid,
+                                                       LMAC_FID_ON_OST);
+                                       RETURN(0);
+                               }
+                       }
+               }
+
+               CDEBUG(D_INODE, "%s: FID "DFID" != self_fid "DFID"\n",
+                      osd_name(osd), PFID(rfid), PFID(fid));
+               rc = -EREMCHG;
+       }
+
+       RETURN(rc);
+}
+
 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
                          const struct lu_fid *fid,
                          const struct lu_object_conf *conf)
@@ -302,7 +556,9 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
        struct osd_scrub       *scrub;
        struct scrub_file      *sf;
        int                     result;
-       int                     verify = 0;
+       int                     saved  = 0;
+       bool                    in_oi  = false;
+       bool                    triggered = false;
        ENTRY;
 
        LINVRNT(osd_invariant(obj));
@@ -319,8 +575,17 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
        if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT))
                RETURN(-ENOENT);
 
+       /* For the object is created as locking anchor, or for the object to
+        * be created on disk. No need to osd_oi_lookup() at here because FID
+        * shouldn't never be re-used, if it's really a duplicate FID from
+        * unexpected reason, we should be able to detect it later by calling
+        * do_create->osd_oi_insert(). */
+       if (conf != NULL && conf->loc_flags & LOC_F_NEW)
+               GOTO(out, result = 0);
+
        /* Search order: 1. per-thread cache. */
-       if (lu_fid_eq(fid, &oic->oic_fid)) {
+       if (lu_fid_eq(fid, &oic->oic_fid) &&
+           likely(oic->oic_dev == dev)) {
                id = &oic->oic_lid;
                goto iget;
        }
@@ -333,23 +598,11 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
                        goto iget;
        }
 
-       if (sf->sf_flags & SF_INCONSISTENT)
-               verify = 1;
-
-       /*
-        * Objects are created as locking anchors or place holders for objects
-        * yet to be created. No need to osd_oi_lookup() at here because FID
-        * shouldn't never be re-used, if it's really a duplicate FID from
-        * unexpected reason, we should be able to detect it later by calling
-        * do_create->osd_oi_insert()
-        */
-       if (conf != NULL && (conf->loc_flags & LOC_F_NEW) != 0)
-               GOTO(out, result = 0);
-
        /* Search order: 3. OI files. */
-       result = osd_oi_lookup(info, dev, fid, id);
+       result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
        if (result == -ENOENT) {
                if (!fid_is_norm(fid) ||
+                   fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
                    !ldiskfs_test_bit(osd_oi_fid2idx(dev,fid),
                                      sf->sf_oi_bitmap))
                        GOTO(out, result = 0);
@@ -360,32 +613,64 @@ static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
        if (result != 0)
                GOTO(out, result);
 
+       in_oi = true;
+
 iget:
-       if (verify == 0)
-               inode = osd_iget(info, dev, id);
-       else
-               inode = osd_iget_verify(info, dev, id, fid);
+       inode = osd_iget_check(info, dev, fid, id, in_oi);
        if (IS_ERR(inode)) {
                result = PTR_ERR(inode);
                if (result == -ENOENT || result == -ESTALE) {
-                       fid_zero(&oic->oic_fid);
-                       result = 0;
+                       if (!in_oi)
+                               fid_zero(&oic->oic_fid);
+
+                       GOTO(out, result = -ENOENT);
                } else if (result == -EREMCHG) {
 
 trigger:
+                       if (!in_oi)
+                               fid_zero(&oic->oic_fid);
+
+                       if (unlikely(triggered))
+                               GOTO(out, result = saved);
+
+                       triggered = true;
                        if (thread_is_running(&scrub->os_thread)) {
                                result = -EINPROGRESS;
                        } else if (!dev->od_noscrub) {
                                result = osd_scrub_start(dev);
-                               LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC "
-                                              "for "DFID", rc = %d [1]\n",
-                                              LDISKFS_SB(osd_sb(dev))->s_es->\
-                                              s_volume_name,PFID(fid), result);
+                               LCONSOLE_WARN("%.16s: trigger OI scrub by RPC "
+                                             "for "DFID", rc = %d [1]\n",
+                                             osd_name(dev), PFID(fid),result);
                                if (result == 0 || result == -EALREADY)
                                        result = -EINPROGRESS;
                                else
                                        result = -EREMCHG;
                        }
+
+                       /* We still have chance to get the valid inode: for the
+                        * object which is referenced by remote name entry, the
+                        * object on the local MDT will be linked under the dir
+                        * of "/REMOTE_PARENT_DIR" with its FID string as name.
+                        *
+                        * We do not know whether the object for the given FID
+                        * is referenced by some remote name entry or not, and
+                        * especially for DNE II, a multiple-linked object may
+                        * have many name entries reside on many MDTs.
+                        *
+                        * To simplify the operation, OSD will not distinguish
+                        * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
+                        * only happened for the RPC from other MDT during the
+                        * OI scrub, or for the client side RPC with FID only,
+                        * such as FID to path, or from old connected client. */
+                       saved = result;
+                       result = osd_lookup_in_remote_parent(info, dev,
+                                                            fid, id);
+                       if (result == 0) {
+                               in_oi = false;
+                               goto iget;
+                       }
+
+                       result = saved;
                }
 
                 GOTO(out, result);
@@ -394,6 +679,26 @@ trigger:
         obj->oo_inode = inode;
         LASSERT(obj->oo_inode->i_sb == osd_sb(dev));
 
+       result = osd_check_lma(env, obj);
+       if (result != 0) {
+               iput(inode);
+               obj->oo_inode = NULL;
+               if (result == -EREMCHG) {
+                       if (!in_oi) {
+                               result = osd_oi_lookup(info, dev, fid, id,
+                                                      OI_CHECK_FLD);
+                               if (result != 0) {
+                                       fid_zero(&oic->oic_fid);
+                                       GOTO(out, result);
+                               }
+                       }
+
+                       goto trigger;
+               }
+
+               GOTO(out, result);
+       }
+
        obj->oo_compat_dot_created = 1;
        obj->oo_compat_dotdot_created = 1;
 
@@ -437,17 +742,17 @@ static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 
        LINVRNT(osd_invariant(obj));
 
+       if (fid_is_otable_it(&l->lo_header->loh_fid)) {
+               obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
+               l->lo_header->loh_attr |= LOHA_EXISTS;
+               return 0;
+       }
+
        result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
        obj->oo_dt.do_body_ops = &osd_body_ops_new;
-       if (result == 0) {
-               if (obj->oo_inode != NULL) {
-                       osd_object_init0(obj);
-               } else if (fid_is_otable_it(&l->lo_header->loh_fid)) {
-                       obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
-                       /* LFSCK iterator object is special without inode */
-                       l->lo_header->loh_attr |= LOHA_EXISTS;
-               }
-       }
+       if (result == 0 && obj->oo_inode != NULL)
+               osd_object_init0(obj);
+
        LINVRNT(osd_invariant(obj));
        return result;
 }
@@ -525,8 +830,7 @@ 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 +901,8 @@ 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;
@@ -625,29 +925,29 @@ static void osd_trans_commit_cb(struct journal_callback *jcb, int error)
                dcb->dcb_func(NULL, th, dcb, error);
        }
 
-        lu_ref_del_at(&lud->ld_reference, oh->ot_dev_link, "osd-tx", th);
+       lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
         lu_device_put(lud);
         th->th_dev = NULL;
 
         lu_context_exit(&th->th_ctx);
         lu_context_fini(&th->th_ctx);
-        OBD_FREE_PTR(oh);
+       thandle_put(th);
 }
 
 static struct thandle *osd_trans_create(const struct lu_env *env,
-                                        struct dt_device *d)
+                                       struct dt_device *d)
 {
-        struct osd_thread_info *oti = osd_oti_get(env);
-        struct osd_iobuf       *iobuf = &oti->oti_iobuf;
-        struct osd_thandle     *oh;
-        struct thandle         *th;
-        ENTRY;
+       struct osd_thread_info  *oti = osd_oti_get(env);
+       struct osd_iobuf        *iobuf = &oti->oti_iobuf;
+       struct osd_thandle      *oh;
+       struct thandle          *th;
+       ENTRY;
 
-        /* on pending IO in this thread should left from prev. request */
-        LASSERT(cfs_atomic_read(&iobuf->dr_numreqs) == 0);
+       /* on pending IO in this thread should left from prev. request */
+       LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
 
         th = ERR_PTR(-ENOMEM);
-        OBD_ALLOC_GFP(oh, sizeof *oh, CFS_ALLOC_IO);
+       OBD_ALLOC_GFP(oh, sizeof *oh, __GFP_IO);
         if (oh != NULL) {
                oh->ot_quota_trans = &oti->oti_quota_trans;
                memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
@@ -656,9 +956,19 @@ static struct thandle *osd_trans_create(const struct lu_env *env,
                 th->th_result = 0;
                 th->th_tags = LCT_TX_HANDLE;
                 oh->ot_credits = 0;
-                oti->oti_dev = osd_dt_dev(d);
+               atomic_set(&th->th_refc, 1);
+               th->th_alloc_size = sizeof(*oh);
+               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 +1005,35 @@ 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 +1041,6 @@ 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.
@@ -734,7 +1054,7 @@ int osd_trans_start(const struct lu_env *env, struct dt_device *d,
          * XXX temporary stuff. Some abstraction layer should
          * be used.
          */
-        jh = ldiskfs_journal_start_sb(osd_sb(dev), oh->ot_credits);
+        jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
         osd_th_started(oh);
         if (!IS_ERR(jh)) {
                 oh->ot_handle = jh;
@@ -743,8 +1063,8 @@ int osd_trans_start(const struct lu_env *env, struct dt_device *d,
                 lu_context_enter(&th->th_ctx);
 
                 lu_device_get(&d->dd_lu_dev);
-                oh->ot_dev_link = lu_ref_add(&d->dd_lu_dev.ld_reference,
-                                             "osd-tx", th);
+               lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
+                             "osd-tx", th);
                 oti->oti_txns++;
                 rc = 0;
         } else {
@@ -754,10 +1074,33 @@ out:
         RETURN(rc);
 }
 
+static int osd_seq_exists(const struct lu_env *env,
+                             struct osd_device *osd, obd_seq seq)
+{
+       struct lu_seq_range     *range = &osd_oti_get(env)->oti_seq_range;
+       struct seq_server_site  *ss = osd_seq_site(osd);
+       int                     rc;
+       ENTRY;
+
+       if (ss == NULL)
+               RETURN(1);
+
+       rc = osd_fld_lookup(env, osd, seq, range);
+       if (rc != 0) {
+               if (rc != -ENOENT)
+                       CERROR("%s: can't lookup FLD sequence "LPX64
+                              ": rc = %d\n", osd_name(osd), seq, rc);
+               RETURN(0);
+       }
+
+       RETURN(ss->ss_node_id == range->lsr_index);
+}
+
 /*
  * Concurrency: shouldn't matter.
  */
-static int osd_trans_stop(const struct lu_env *env, struct thandle *th)
+static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
+                         struct thandle *th)
 {
         int                     rc = 0;
         struct osd_thandle     *oh;
@@ -782,7 +1125,7 @@ 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);
@@ -800,24 +1143,24 @@ static int osd_trans_stop(const struct lu_env *env, struct thandle *th)
                 if (rc != 0)
                         CERROR("Failure to stop transaction: %d\n", rc);
         } else {
-                OBD_FREE_PTR(oh);
+               thandle_put(&oh->ot_super);
         }
 
-        /* as we want IO to journal and data IO be concurrent, we don't block
-         * awaiting data IO completion in osd_do_bio(), instead we wait here
-         * once transaction is submitted to the journal. all reqular requests
-         * don't do direct IO (except read/write), thus this wait_event becomes
-         * no-op for them.
-         *
-         * IMPORTANT: we have to wait till any IO submited by the thread is
-         * completed otherwise iobuf may be corrupted by different request
-         */
-        cfs_wait_event(iobuf->dr_wait,
-                       cfs_atomic_read(&iobuf->dr_numreqs) == 0);
-        if (!rc)
-                rc = iobuf->dr_error;
+       /* as we want IO to journal and data IO be concurrent, we don't block
+        * awaiting data IO completion in osd_do_bio(), instead we wait here
+        * once transaction is submitted to the journal. all reqular requests
+        * don't do direct IO (except read/write), thus this wait_event becomes
+        * no-op for them.
+        *
+        * IMPORTANT: we have to wait till any IO submited by the thread is
+        * completed otherwise iobuf may be corrupted by different request
+        */
+       wait_event(iobuf->dr_wait,
+                      atomic_read(&iobuf->dr_numreqs) == 0);
+       if (!rc)
+               rc = iobuf->dr_error;
 
-        RETURN(rc);
+       RETURN(rc);
 }
 
 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
@@ -865,10 +1208,10 @@ static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 
                        /* Release granted quota to master if necessary */
                        qi->lqi_id.qid_uid = uid;
-                       qsd_adjust_quota(env, qsd, &qi->lqi_id, USRQUOTA);
+                       qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
 
                        qi->lqi_id.qid_uid = gid;
-                       qsd_adjust_quota(env, qsd, &qi->lqi_id, GRPQUOTA);
+                       qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
                }
         }
 }
@@ -902,6 +1245,8 @@ static int osd_object_print(const struct lu_env *env, void *cookie,
                     d ? d->id_ops->id_name : "plain");
 }
 
+#define GRANT_FOR_LOCAL_OIDS 32 /* 128kB for last_rcvd, quota files, ... */
+
 /*
  * Concurrency: shouldn't matter.
  */
@@ -925,25 +1270,29 @@ 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);
-       /* cache 1 second */
-       if (cfs_time_before_64(osd->od_osfs_age, cfs_time_shift_64(-1))) {
-               result = sb->s_op->statfs(sb->s_root, ksfs);
-               if (likely(result == 0)) { /* N.B. statfs can't really fail */
-                       osd->od_osfs_age = cfs_time_current_64();
-                       statfs_pack(&osd->od_statfs, ksfs);
-                       if (sb->s_flags & MS_RDONLY)
-                               sfs->os_state = OS_STATE_READONLY;
-               }
+       spin_lock(&osd->od_osfs_lock);
+       result = sb->s_op->statfs(sb->s_root, ksfs);
+       if (likely(result == 0)) { /* N.B. statfs can't really fail */
+               statfs_pack(sfs, ksfs);
+               if (sb->s_flags & MS_RDONLY)
+                       sfs->os_state = OS_STATE_READONLY;
        }
 
-        if (likely(result == 0))
-                *sfs = osd->od_statfs;
-        cfs_spin_unlock(&osd->od_osfs_lock);
+       spin_unlock(&osd->od_osfs_lock);
 
-        if (unlikely(env == NULL))
+       if (unlikely(env == NULL))
                 OBD_FREE_PTR(ksfs);
 
+       /* Reserve a small amount of space for local objects like last_rcvd,
+        * llog, quota files, ... */
+       if (sfs->os_bavail <= GRANT_FOR_LOCAL_OIDS) {
+               sfs->os_bavail = 0;
+       } else {
+               sfs->os_bavail -= GRANT_FOR_LOCAL_OIDS;
+               /** Take out metadata overhead for indirect blocks */
+               sfs->os_bavail -= sfs->os_bavail >> (sb->s_blocksize_bits - 3);
+       }
+
         return result;
 }
 
@@ -970,7 +1319,6 @@ static void osd_conf_get(const struct lu_env *env,
         /*
          * XXX should be taken from not-yet-existing fs abstraction layer.
          */
-       param->ddp_mnt = osd_dt_dev(dev)->od_mnt;
         param->ddp_max_name_len = LDISKFS_NAME_LEN;
         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
        param->ddp_block_shift  = sb->s_blocksize_bits;
@@ -999,19 +1347,6 @@ 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 +1384,31 @@ 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 +1507,7 @@ 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 +1522,7 @@ 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 +1539,7 @@ 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 +1554,7 @@ 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 +1593,14 @@ 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");
@@ -1271,48 +1623,50 @@ static int capa_is_sane(const struct lu_env *env,
 }
 
 int osd_object_auth(const struct lu_env *env, struct dt_object *dt,
-                    struct lustre_capa *capa, __u64 opc)
+                   struct lustre_capa *capa, __u64 opc)
 {
-        const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
-        struct osd_device *dev = osd_dev(dt->do_lu.lo_dev);
-        struct md_capainfo *ci;
-        int rc;
+       const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
+       struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
+       struct lu_capainfo *lci;
+       int rc;
 
-        if (!dev->od_fl_capa)
-                return 0;
+       if (!osd->od_fl_capa)
+               return 0;
 
-        if (capa == BYPASS_CAPA)
-                return 0;
+       if (capa == BYPASS_CAPA)
+               return 0;
 
-        ci = md_capainfo(env);
-        if (unlikely(!ci))
-                return 0;
+       lci = lu_capainfo_get(env);
+       if (unlikely(lci == NULL))
+               return 0;
 
-        if (ci->mc_auth == LC_ID_NONE)
-                return 0;
+       if (lci->lci_auth == LC_ID_NONE)
+               return 0;
 
-        if (!capa) {
-                CERROR("no capability is provided for fid "DFID"\n", PFID(fid));
-                return -EACCES;
-        }
+       if (capa == NULL) {
+               CERROR("%s: no capability provided for FID "DFID": rc = %d\n",
+                      osd_name(osd), PFID(fid), -EACCES);
+               return -EACCES;
+       }
 
-        if (!lu_fid_eq(fid, &capa->lc_fid)) {
-                DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
-                           PFID(fid));
-                return -EACCES;
-        }
+       if (!lu_fid_eq(fid, &capa->lc_fid)) {
+               DEBUG_CAPA(D_ERROR, capa, "fid "DFID" mismatch with",
+                          PFID(fid));
+               return -EACCES;
+       }
 
-        if (!capa_opc_supported(capa, opc)) {
-                DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
-                return -EACCES;
-        }
+       if (!capa_opc_supported(capa, opc)) {
+               DEBUG_CAPA(D_ERROR, capa, "opc "LPX64" not supported by", opc);
+               return -EACCES;
+       }
 
-        if ((rc = capa_is_sane(env, dev, capa, dev->od_capa_keys))) {
-                DEBUG_CAPA(D_ERROR, capa, "insane (rc %d)", rc);
-                return -EACCES;
-        }
+       rc = capa_is_sane(env, osd, capa, osd->od_capa_keys);
+       if (rc != 0) {
+               DEBUG_CAPA(D_ERROR, capa, "insane: rc = %d", rc);
+               return -EACCES;
+       }
 
-        return 0;
+       return 0;
 }
 
 static struct timespec *osd_inode_time(const struct lu_env *env,
@@ -1333,7 +1687,8 @@ 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 +1712,16 @@ 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 +1747,8 @@ 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 +1871,6 @@ 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)
@@ -1543,7 +1896,7 @@ static int osd_inode_setattr(const struct lu_env *env,
         if (bits & LA_GID)
                 inode->i_gid    = attr->la_gid;
         if (bits & LA_NLINK)
-                inode->i_nlink  = attr->la_nlink;
+               set_nlink(inode, attr->la_nlink);
         if (bits & LA_RDEV)
                 inode->i_rdev   = attr->la_rdev;
 
@@ -1592,13 +1945,38 @@ 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 +1985,12 @@ 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;
 }
 
@@ -1624,9 +2002,8 @@ struct dentry *osd_child_dentry_get(const struct lu_env *env,
 }
 
 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
-                      cfs_umode_t mode,
-                      struct dt_allocation_hint *hint,
-                      struct thandle *th)
+                     umode_t mode, struct dt_allocation_hint *hint,
+                     struct thandle *th)
 {
         int result;
         struct osd_device  *osd = osd_obj2dev(obj);
@@ -1659,7 +2036,10 @@ 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 {
@@ -1756,16 +2136,16 @@ static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
 }
 
 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
-                     struct lu_attr *attr,
-                     struct dt_allocation_hint *hint,
-                     struct dt_object_format *dof,
-                     struct thandle *th)
+                    struct lu_attr *attr,
+                    struct dt_allocation_hint *hint,
+                    struct dt_object_format *dof,
+                    struct thandle *th)
 {
-        cfs_umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
-        int result;
+       umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
+       int result;
 
-        LINVRNT(osd_invariant(obj));
-        LASSERT(obj->oo_inode == NULL);
+       LINVRNT(osd_invariant(obj));
+       LASSERT(obj->oo_inode == NULL);
         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
                 S_ISFIFO(mode) || S_ISSOCK(mode));
 
@@ -1776,7 +2156,8 @@ 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;
@@ -1819,11 +2200,10 @@ static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
 
 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
                        struct dt_object *parent, struct dt_object *child,
-                       cfs_umode_t child_mode)
+                       umode_t child_mode)
 {
         LASSERT(ah);
 
-        memset(ah, 0, sizeof(*ah));
         ah->dah_parent = parent;
         ah->dah_mode = child_mode;
 }
@@ -1860,7 +2240,7 @@ 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 +2277,7 @@ static int __osd_object_create(struct osd_thread_info *info,
        /* restore previous umask value */
        current->fs->umask = umask;
 
-        return result;
+       return result;
 }
 
 /**
@@ -1906,18 +2286,51 @@ static int __osd_object_create(struct osd_thread_info *info,
  * \retval 0, on success
  */
 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
-                           const struct lu_fid *fid, struct thandle *th)
+                          const struct lu_fid *fid, struct thandle *th)
 {
-        struct osd_thread_info *info = osd_oti_get(env);
-        struct osd_inode_id    *id   = &info->oti_id;
-        struct osd_device      *osd  = osd_obj2dev(obj);
+       struct osd_thread_info *info = osd_oti_get(env);
+       struct osd_inode_id    *id   = &info->oti_id;
+       struct osd_device      *osd  = osd_obj2dev(obj);
+       struct osd_thandle     *oh;
 
-        LASSERT(obj->oo_inode != NULL);
+       LASSERT(obj->oo_inode != NULL);
+
+       oh = container_of0(th, struct osd_thandle, ot_super);
+       LASSERT(oh->ot_handle);
 
        osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
-       return osd_oi_insert(info, osd, fid, id, th);
+       return osd_oi_insert(info, osd, fid, id, oh->ot_handle, OI_CHECK_FLD);
+}
+
+int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
+                  obd_seq seq, struct lu_seq_range *range)
+{
+       struct seq_server_site  *ss = osd_seq_site(osd);
+
+       if (fid_seq_is_idif(seq)) {
+               fld_range_set_ost(range);
+               range->lsr_index = idif_ost_idx(seq);
+               return 0;
+       }
+
+       if (!fid_seq_in_fldb(seq)) {
+               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);
+       /* OSD will only do local fld lookup */
+       return fld_local_lookup(env, ss->ss_server_fld, seq, range);
 }
 
+/*
+ * 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,
@@ -1934,24 +2347,24 @@ 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), OI_CHECK_FLD))
                /* 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 +2372,9 @@ 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);
+
        RETURN(rc);
 }
 
@@ -1976,7 +2392,7 @@ 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 +2401,16 @@ 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 +2434,12 @@ 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 +2471,26 @@ 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);
-                inode->i_nlink = 0;
-                cfs_spin_unlock(&obj->oo_guard);
-                inode->i_sb->s_op->dirty_inode(inode);
-        } else {
-                LASSERT(osd_inode_unlinked(inode));
-        }
+       if (S_ISDIR(inode->i_mode)) {
+               LASSERT(osd_inode_unlinked(inode) || inode->i_nlink == 1 ||
+                       inode->i_nlink == 2);
+               /* 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);
+               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);
+       result = osd_oi_delete(osd_oti_get(env), osd, fid, oh->ot_handle,
+                              OI_CHECK_FLD);
 
         /* XXX: add to ext3 orphan list */
         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
@@ -2083,35 +2502,6 @@ 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 +2511,46 @@ 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, __u32 compat, __u32 incompat)
 {
-        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;
+       ENTRY;
 
-        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, compat, incompat);
+       lustre_lma_swab(lma);
+
+       rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma, sizeof(*lma),
+                            XATTR_CREATE);
+       /* LMA may already exist, but we need to check that all the
+        * desired compat/incompat flags have been added. */
+       if (unlikely(rc == -EEXIST)) {
+               if (compat == 0 && incompat == 0)
+                       RETURN(0);
+
+               rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
+                                    XATTR_NAME_LMA, info->oti_mdt_attrs_old,
+                                    LMA_OLD_SIZE);
+               if (rc <= 0)
+                       RETURN(-EINVAL);
+
+               lustre_lma_swab(lma);
+               if (!(~lma->lma_compat & compat) &&
+                   !(~lma->lma_incompat & incompat))
+                       RETURN(0);
+
+               lma->lma_compat |= compat;
+               lma->lma_incompat |= incompat;
+               lustre_lma_swab(lma);
+               rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
+                                    sizeof(*lma), XATTR_REPLACE);
+       }
 
+       RETURN(rc);
 }
 
 /**
@@ -2144,18 +2562,21 @@ 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 +2599,103 @@ 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, 0, 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 +2718,7 @@ 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 +2727,21 @@ 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,
+                               fid_is_on_ost(info, osd_obj2dev(obj),
+                                             fid, OI_CHECK_FLD) ?
+                               LMAC_FID_ON_OST : 0, 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 +2750,7 @@ 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 +2758,8 @@ 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;
 }
@@ -2247,39 +2770,41 @@ 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;
+       struct osd_thandle *oh;
+       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);
+        oh = container_of0(th, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle != NULL);
 
-        /*
-         * DIR_NLINK feature is set for compatibility reasons if:
-         * 1) nlinks > LDISKFS_LINK_MAX, or
-         * 2) nlinks == 2, since this indicates i_nlink was previously 1.
-         *
-         * It is easier to always set this flag (rather than check and set),
-         * since it has less overhead, and the superblock will be dirtied
-         * at some point. Both e2fsprogs and any Lustre-supported ldiskfs
-         * do not actually care whether this flag is set or not.
-         */
-        cfs_spin_lock(&obj->oo_guard);
-        inode->i_nlink++;
-        if (S_ISDIR(inode->i_mode) && inode->i_nlink > 1) {
-                if (inode->i_nlink >= LDISKFS_LINK_MAX ||
-                    inode->i_nlink == 2)
-                        inode->i_nlink = 1;
-        }
-        LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
-        cfs_spin_unlock(&obj->oo_guard);
-        inode->i_sb->s_op->dirty_inode(inode);
-        LINVRNT(osd_invariant(obj));
+       osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
 
-        return 0;
+       /*
+        * 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.
+        *
+        * This also has to properly handle the case of inodes with nlink == 0
+        * in case they are being linked into the PENDING directory
+        */
+       spin_lock(&obj->oo_guard);
+       ldiskfs_inc_count(oh->ot_handle, inode);
+       LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
+       spin_unlock(&obj->oo_guard);
+
+       ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+       LINVRNT(osd_invariant(obj));
+
+       return rc;
 }
 
 static int osd_declare_object_ref_del(const struct lu_env *env,
@@ -2288,13 +2813,14 @@ 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;
 }
@@ -2305,29 +2831,41 @@ static int osd_declare_object_ref_del(const struct lu_env *env,
 static int osd_object_ref_del(const struct lu_env *env, struct dt_object *dt,
                               struct thandle *th)
 {
-        struct osd_object *obj = osd_dt_obj(dt);
-        struct inode      *inode = obj->oo_inode;
+       struct osd_object       *obj = osd_dt_obj(dt);
+       struct inode            *inode = obj->oo_inode;
+       struct osd_device       *osd = osd_dev(dt->do_lu.lo_dev);
+       struct osd_thandle      *oh;
 
-        LINVRNT(osd_invariant(obj));
-        LASSERT(dt_object_exists(dt));
-        LASSERT(osd_write_locked(env, obj));
-        LASSERT(th != NULL);
+       LINVRNT(osd_invariant(obj));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
+       LASSERT(osd_write_locked(env, obj));
+       LASSERT(th != NULL);
 
-        OSD_EXEC_OP(th, ref_del);
-
-        cfs_spin_lock(&obj->oo_guard);
-        LASSERT(inode->i_nlink > 0);
-        inode->i_nlink--;
-        /* If this is/was a many-subdir directory (nlink > LDISKFS_LINK_MAX)
-         * then the nlink count is 1. Don't let it be set to 0 or the directory
-         * inode will be deleted incorrectly. */
-        if (S_ISDIR(inode->i_mode) && inode->i_nlink == 0)
-                inode->i_nlink++;
-        cfs_spin_unlock(&obj->oo_guard);
-        inode->i_sb->s_op->dirty_inode(inode);
-        LINVRNT(osd_invariant(obj));
+        oh = container_of0(th, struct osd_thandle, ot_super);
+        LASSERT(oh->ot_handle != NULL);
 
-        return 0;
+       osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
+
+       spin_lock(&obj->oo_guard);
+       /* That can be result of upgrade from old Lustre version and
+        * applied only to local files.  Just skip this ref_del call.
+        * ext4_unlink() only treats this as a warning, don't LASSERT here.*/
+       if (inode->i_nlink == 0) {
+               CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
+                            D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
+                            ", maybe an upgraded file? (LU-3915)\n",
+                            osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
+               spin_unlock(&obj->oo_guard);
+               return 0;
+       }
+
+       ldiskfs_dec_count(oh->ot_handle, inode);
+       spin_unlock(&obj->oo_guard);
+
+       ll_dirty_inode(inode, I_DIRTY_DATASYNC);
+       LINVRNT(osd_invariant(obj));
+
+       return 0;
 }
 
 /*
@@ -2365,14 +2903,13 @@ 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);
 }
 
 
@@ -2388,9 +2925,10 @@ 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;
 }
@@ -2410,7 +2948,7 @@ 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);
 }
 
 /*
@@ -2420,6 +2958,12 @@ 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 */
@@ -2434,8 +2978,18 @@ 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);
+       CDEBUG(D_INODE, DFID" set xattr '%s' with size %zd\n",
+              PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
+
+       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);
 }
 
 /*
@@ -2449,7 +3003,7 @@ 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));
 
@@ -2457,6 +3011,7 @@ 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);
 }
 
@@ -2466,13 +3021,14 @@ 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;
 }
@@ -2490,107 +3046,106 @@ 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;
 }
 
 static struct obd_capa *osd_capa_get(const struct lu_env *env,
-                                     struct dt_object *dt,
-                                     struct lustre_capa *old,
-                                     __u64 opc)
+                                    struct dt_object *dt,
+                                    struct lustre_capa *old, __u64 opc)
 {
-        struct osd_thread_info *info = osd_oti_get(env);
-        const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
-        struct osd_object *obj = osd_dt_obj(dt);
-        struct osd_device *dev = osd_obj2dev(obj);
-        struct lustre_capa_key *key = &info->oti_capa_key;
-        struct lustre_capa *capa = &info->oti_capa;
-        struct obd_capa *oc;
-        struct md_capainfo *ci;
-        int rc;
-        ENTRY;
+       struct osd_thread_info *info = osd_oti_get(env);
+       const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
+       struct osd_object *obj = osd_dt_obj(dt);
+       struct osd_device *osd = osd_obj2dev(obj);
+       struct lustre_capa_key *key = &info->oti_capa_key;
+       struct lustre_capa *capa = &info->oti_capa;
+       struct obd_capa *oc;
+       struct lu_capainfo *lci;
+       int rc;
+       ENTRY;
 
-        if (!dev->od_fl_capa)
-                RETURN(ERR_PTR(-ENOENT));
+       if (!osd->od_fl_capa)
+               RETURN(ERR_PTR(-ENOENT));
 
-        LASSERT(dt_object_exists(dt));
-        LINVRNT(osd_invariant(obj));
+       LASSERT(dt_object_exists(dt) && !dt_object_remote(dt));
+       LINVRNT(osd_invariant(obj));
 
-        /* renewal sanity check */
-        if (old && osd_object_auth(env, dt, old, opc))
-                RETURN(ERR_PTR(-EACCES));
-
-        ci = md_capainfo(env);
-        if (unlikely(!ci))
-                RETURN(ERR_PTR(-ENOENT));
-
-        switch (ci->mc_auth) {
-        case LC_ID_NONE:
-                RETURN(NULL);
-        case LC_ID_PLAIN:
-                capa->lc_uid = obj->oo_inode->i_uid;
-                capa->lc_gid = obj->oo_inode->i_gid;
-                capa->lc_flags = LC_ID_PLAIN;
-                break;
-        case LC_ID_CONVERT: {
-                __u32 d[4], s[4];
-
-                s[0] = obj->oo_inode->i_uid;
-                cfs_get_random_bytes(&(s[1]), sizeof(__u32));
-                s[2] = obj->oo_inode->i_gid;
-                cfs_get_random_bytes(&(s[3]), sizeof(__u32));
-                rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
-                if (unlikely(rc))
-                        RETURN(ERR_PTR(rc));
-
-                capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
-                capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
-                capa->lc_flags = LC_ID_CONVERT;
-                break;
-        }
-        default:
-                RETURN(ERR_PTR(-EINVAL));
+       /* renewal sanity check */
+       if (old && osd_object_auth(env, dt, old, opc))
+               RETURN(ERR_PTR(-EACCES));
+
+       lci = lu_capainfo_get(env);
+       if (unlikely(lci == NULL))
+               RETURN(ERR_PTR(-ENOENT));
+
+       switch (lci->lci_auth) {
+       case LC_ID_NONE:
+               RETURN(NULL);
+       case LC_ID_PLAIN:
+               capa->lc_uid = obj->oo_inode->i_uid;
+               capa->lc_gid = obj->oo_inode->i_gid;
+               capa->lc_flags = LC_ID_PLAIN;
+               break;
+       case LC_ID_CONVERT: {
+               __u32 d[4], s[4];
+
+               s[0] = obj->oo_inode->i_uid;
+               cfs_get_random_bytes(&(s[1]), sizeof(__u32));
+               s[2] = obj->oo_inode->i_gid;
+               cfs_get_random_bytes(&(s[3]), sizeof(__u32));
+               rc = capa_encrypt_id(d, s, key->lk_key, CAPA_HMAC_KEY_MAX_LEN);
+               if (unlikely(rc))
+                       RETURN(ERR_PTR(rc));
+
+               capa->lc_uid   = ((__u64)d[1] << 32) | d[0];
+               capa->lc_gid   = ((__u64)d[3] << 32) | d[2];
+               capa->lc_flags = LC_ID_CONVERT;
+               break;
         }
+       default:
+               RETURN(ERR_PTR(-EINVAL));
+       }
 
-        capa->lc_fid = *fid;
-        capa->lc_opc = opc;
-        capa->lc_flags |= dev->od_capa_alg << 24;
-        capa->lc_timeout = dev->od_capa_timeout;
-        capa->lc_expiry = 0;
+       capa->lc_fid = *fid;
+       capa->lc_opc = opc;
+       capa->lc_flags |= osd->od_capa_alg << 24;
+       capa->lc_timeout = osd->od_capa_timeout;
+       capa->lc_expiry = 0;
 
-        oc = capa_lookup(dev->od_capa_hash, capa, 1);
-        if (oc) {
-                LASSERT(!capa_is_expired(oc));
-                RETURN(oc);
-        }
+       oc = capa_lookup(osd->od_capa_hash, capa, 1);
+       if (oc) {
+               LASSERT(!capa_is_expired(oc));
+               RETURN(oc);
+       }
 
-        cfs_spin_lock(&capa_lock);
-        *key = dev->od_capa_keys[1];
-        cfs_spin_unlock(&capa_lock);
+       spin_lock(&capa_lock);
+       *key = osd->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;
+       capa->lc_keyid = key->lk_keyid;
+       capa->lc_expiry = cfs_time_current_sec() + osd->od_capa_timeout;
 
-        rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
-        if (rc) {
-                DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
-                RETURN(ERR_PTR(rc));
-        }
+       rc = capa_hmac(capa->lc_hmac, capa, key->lk_key);
+       if (rc) {
+               DEBUG_CAPA(D_ERROR, capa, "HMAC failed: %d for", rc);
+               RETURN(ERR_PTR(rc));
+       }
 
-        oc = capa_add(dev->od_capa_hash, capa);
-        RETURN(oc);
+       oc = capa_add(osd->od_capa_hash, capa);
+       RETURN(oc);
 }
 
 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt)
@@ -2605,12 +3160,18 @@ 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;
+       set_file_inode(file, inode);
+#ifndef HAVE_FILE_FSYNC_4ARGS
        mutex_lock(&inode->i_mutex);
-       rc = file->f_op->fsync(file, dentry, 0);
+#endif
+       rc = do_fsync(file, 0);
+#ifndef HAVE_FILE_FSYNC_4ARGS
        mutex_unlock(&inode->i_mutex);
+#endif
        RETURN(rc);
 }
 
@@ -2690,14 +3251,13 @@ 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;
@@ -2705,7 +3265,7 @@ 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;
@@ -2715,28 +3275,28 @@ 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;
                 }
@@ -2750,7 +3310,8 @@ 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;
@@ -2844,7 +3405,8 @@ 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;
 }
@@ -2876,14 +3438,14 @@ 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))
@@ -2915,13 +3477,14 @@ 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);
@@ -2941,7 +3504,22 @@ 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)
+{
+       ENTRY;
+
+       /* FID seqs not in FLDB, must be local seq */
+       if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
+               RETURN(0);
+
+       if (osd_seq_exists(env, osd, fid_seq(fid)))
+               RETURN(0);
+
+       RETURN(1);
 }
 
 /**
@@ -2963,18 +3541,19 @@ 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);
@@ -2992,21 +3571,108 @@ 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 = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, 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);
@@ -3038,7 +3704,7 @@ 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))
@@ -3090,13 +3756,13 @@ 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;
 }
@@ -3128,14 +3794,14 @@ 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))
@@ -3186,27 +3852,20 @@ 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);
 }
 
 /**
@@ -3229,8 +3888,6 @@ 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;
 
@@ -3246,32 +3903,23 @@ 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;
 }
 
 
@@ -3295,7 +3943,7 @@ 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),
@@ -3305,16 +3953,26 @@ 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;
 }
@@ -3334,7 +3992,7 @@ 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, OI_CHECK_FLD);
        if (rc != 0 && rc != -ENOENT)
                RETURN_EXIT;
 
@@ -3354,13 +4012,11 @@ again:
        }
 
        if (!dev->od_noscrub && ++once == 1) {
-               CDEBUG(D_LFSCK, "Trigger OI scrub by RPC for "DFID"\n",
-                      PFID(fid));
                rc = osd_scrub_start(dev);
-               LCONSOLE_ERROR("%.16s: trigger OI scrub by RPC for "DFID
-                              ", rc = %d [2]\n",
-                              LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
-                              PFID(fid), rc);
+               LCONSOLE_WARN("%.16s: trigger OI scrub by RPC for "DFID
+                             ", rc = %d [2]\n",
+                             LDISKFS_SB(osd_sb(dev))->s_es->s_volume_name,
+                             PFID(fid), rc);
                if (rc == 0)
                        goto again;
        }
@@ -3368,6 +4024,43 @@ 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;
+}
+
+int osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
+                    struct osd_inode_id *id, const 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;
+       info->oti_cache.oic_dev = osd;
+
+       return 0;
+}
+
 /**
  * Calls ->lookup() to find dentry. From dentry get inode and
  * read inode's ea to get fid. This is required for  interoperability
@@ -3387,6 +4080,7 @@ 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);
 
@@ -3398,34 +4092,48 @@ 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);
+        bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, 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);
+                       osd_id_gen(id, ino, OSD_OII_NOGEN);
                if (rc != 0) {
                        fid_zero(&oic->oic_fid);
                        GOTO(out, rc);
                }
 
-               oic->oic_fid = *fid;
+               if (osd_remote_fid(env, dev, fid))
+                       GOTO(out, rc = 0);
+
+               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);
@@ -3439,7 +4147,7 @@ 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;
 }
 
@@ -3493,10 +4201,11 @@ struct osd_object *osd_object_find(const struct lu_env *env,
                        lu_object_put(env, luch);
                         child = ERR_PTR(-ENOENT);
                 }
-        } else
-                child = (void *)luch;
+       } else {
+               child = ERR_CAST(luch);
+       }
 
-        return child;
+       return child;
 }
 
 /**
@@ -3516,27 +4225,55 @@ 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);
 }
 
@@ -3556,40 +4293,89 @@ 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);
+       }
 
-/**
- *  Initialize osd Iterator for given osd index object.
- *
- *  \param  dt      osd index object
- */
+       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);
+                       }
 
-static struct dt_it *osd_it_iam_init(const struct lu_env *env,
+                       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));
+                       RETURN(PTR_ERR(child));
+               }
+               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);
+}
+
+/**
+ *  Initialize osd Iterator for given osd index object.
+ *
+ *  \param  dt      osd index object
+ */
+
+static struct dt_it *osd_it_iam_init(const struct lu_env *env,
                                      struct dt_object *dt,
                                      __u32 unused,
                                      struct lustre_capa *capa)
@@ -3663,7 +4449,6 @@ 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;
@@ -3722,44 +4507,42 @@ 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);
 }
 
 /**
@@ -3877,6 +4660,7 @@ 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;
@@ -3891,17 +4675,22 @@ 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;
+       set_file_inode(file, obj->oo_inode);
+
+       lu_object_get(lo);
+       RETURN((struct dt_it *) it);
 }
 
 /**
@@ -3969,6 +4758,7 @@ 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;
@@ -3984,16 +4774,23 @@ 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;
@@ -4034,7 +4831,7 @@ 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,
@@ -4043,16 +4840,18 @@ 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;
-        } else {
-                it->oie_dirent = it->oie_buf;
-                it->oie_it_dirent = 1;
-        }
+       if (it->oie_rd_dirent == 0) {
+               /*If it does not get any dirent, it means it has been reached
+                *to the end of the dir */
+               it->oie_file.f_pos = ldiskfs_get_htree_eof(&it->oie_file);
+       } else {
+               it->oie_dirent = it->oie_buf;
+               it->oie_it_dirent = 1;
+       }
 
-        RETURN(result);
+       RETURN(result);
 }
 
 /**
@@ -4119,10 +4918,371 @@ 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 = osd_journal_start_sb(sb, LDISKFS_HT_MISC, 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->d_name, &de, NULL, 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);
+       }
+
+       /* skip the REMOTE_PARENT_DIR. */
+       if (inode == dev->od_mdt_map->omm_remote_parent->d_inode)
+               GOTO(out_inode, rc = 0);
+
+       rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
+       if (rc == 0) {
+               LASSERT(!(lma->lma_compat & LMAC_NOT_IN_OI));
+
+               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, 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.
@@ -4141,6 +5301,7 @@ 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;
@@ -4148,23 +5309,46 @@ 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;
+               } else {
+                       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);
+               }
        }
 
+       /* Pack the entry anyway, at least the offset is right. */
        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 (rc < 0)
+               RETURN(rc);
+
+       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);
 
@@ -4296,12 +5480,14 @@ 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,
@@ -4330,7 +5516,9 @@ 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);
 }
 
@@ -4338,13 +5526,6 @@ static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
 {
        ENTRY;
 
-       osd_scrub_cleanup(env, o);
-
-       if (o->od_fsops) {
-               fsfilt_put_ops(o->od_fsops);
-               o->od_fsops = NULL;
-       }
-
        /* shutdown quota slave instance associated with the device */
        if (o->od_quota_slave != NULL) {
                qsd_fini(env, o->od_quota_slave);
@@ -4354,6 +5535,21 @@ static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
        RETURN(0);
 }
 
+static void osd_umount(const struct lu_env *env, struct osd_device *o)
+{
+       ENTRY;
+
+       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;
+       }
+
+       EXIT;
+}
+
 static int osd_mount(const struct lu_env *env,
                      struct osd_device *o, struct lustre_cfg *cfg)
 {
@@ -4365,19 +5561,20 @@ static int osd_mount(const struct lu_env *env,
        struct file_system_type *type;
        char                    *options = NULL;
        char                    *str;
-       int                       rc = 0;
+       struct osd_thread_info  *info = osd_oti_get(env);
+       struct lu_fid           *fid = &info->oti_fid;
+       struct inode            *inode;
+       int                      rc = 0;
         ENTRY;
 
        if (o->od_mnt != NULL)
                RETURN(0);
 
-        o->od_fsops = fsfilt_get_ops(mt_str(LDD_MT_LDISKFS));
-        if (o->od_fsops == NULL) {
-                CERROR("Can't find fsfilt_ldiskfs\n");
-                RETURN(-ENOTSUPP);
-        }
+       if (strlen(dev) >= sizeof(o->od_mntdev))
+               RETURN(-E2BIG);
+       strcpy(o->od_mntdev, dev);
 
-       OBD_PAGE_ALLOC(__page, CFS_ALLOC_STD);
+       OBD_PAGE_ALLOC(__page, GFP_IOFS);
        if (__page == NULL)
                GOTO(out, rc = -ENOMEM);
 
@@ -4387,7 +5584,7 @@ static int osd_mount(const struct lu_env *env,
        if (str)
                lmd_flags = simple_strtoul(str + 1, NULL, 0);
        opts = lustre_cfg_string(cfg, 3);
-       page = (unsigned long)cfs_page_address(__page);
+       page = (unsigned long)page_address(__page);
        options = (char *)page;
        *options = '\0';
        if (opts == NULL)
@@ -4398,7 +5595,7 @@ static int osd_mount(const struct lu_env *env,
        /* Glom up mount options */
        if (*options != '\0')
                strcat(options, ",");
-       strlcat(options, "no_mbcache", CFS_PAGE_SIZE);
+       strlcat(options, "no_mbcache", PAGE_CACHE_SIZE);
 
        type = get_fs_type("ldiskfs");
        if (!type) {
@@ -4407,68 +5604,71 @@ static int osd_mount(const struct lu_env *env,
        }
 
        o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
-       cfs_module_put(type->owner);
+       module_put(type->owner);
 
        if (IS_ERR(o->od_mnt)) {
                rc = PTR_ERR(o->od_mnt);
-               CERROR("%s: can't mount %s: %d\n", name, dev, rc);
                o->od_mnt = NULL;
+               CERROR("%s: can't mount %s: %d\n", name, dev, rc);
                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);
+               GOTO(out_mnt, rc = -EROFS);
        }
+#endif
 
        if (!LDISKFS_HAS_COMPAT_FEATURE(o->od_mnt->mnt_sb,
-           LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
+                                       LDISKFS_FEATURE_COMPAT_HAS_JOURNAL)) {
                CERROR("%s: device %s is mounted w/o journal\n", name, dev);
-               mntput(o->od_mnt);
-               o->od_mnt = NULL;
-               GOTO(out, rc = -EINVAL);
+               GOTO(out_mnt, rc = -EINVAL);
+       }
+
+#ifdef LDISKFS_MOUNT_DIRDATA
+       if (LDISKFS_HAS_INCOMPAT_FEATURE(o->od_mnt->mnt_sb,
+                                        LDISKFS_FEATURE_INCOMPAT_DIRDATA))
+               LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
+#endif
+       inode = osd_sb(o)->s_root->d_inode;
+       lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
+       rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
+       if (rc != 0) {
+               CERROR("%s: failed to set lma on %s root inode\n", name, dev);
+               GOTO(out_mnt, rc);
        }
 
        if (lmd_flags & LMD_FLG_NOSCRUB)
                o->od_noscrub = 1;
 
+       GOTO(out, rc = 0);
+
+out_mnt:
+       mntput(o->od_mnt);
+       o->od_mnt = NULL;
+
 out:
        if (__page)
                OBD_PAGE_FREE(__page);
-       if (rc)
-               fsfilt_put_ops(o->od_fsops);
 
-        RETURN(rc);
+       return rc;
 }
 
 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_shutdown(env, o);
+       osd_procfs_fini(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,
@@ -4478,6 +5678,7 @@ 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);
@@ -4489,9 +5690,8 @@ 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);
-       o->od_osfs_age = cfs_time_shift_64(-1000);
+       spin_lock_init(&o->od_osfs_lock);
+       mutex_init(&o->od_otable_mutex);
 
        o->od_capa_hash = init_capa_hash();
        if (o->od_capa_hash == NULL)
@@ -4505,32 +5705,43 @@ 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);
+       if (server_name_is_ost(o->od_svname))
+               o->od_is_ost = 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);
+
+       /* self-repair LMA by default */
+       o->od_lma_self_repair = 1;
+
+       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);
@@ -4545,23 +5756,21 @@ 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,
@@ -4577,6 +5786,9 @@ 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);
@@ -4611,23 +5823,32 @@ static struct lu_device *osd_device_free(const struct lu_env *env,
 static int osd_process_config(const struct lu_env *env,
                               struct lu_device *d, struct lustre_cfg *cfg)
 {
-        struct osd_device *o = osd_dev(d);
-        int err;
-        ENTRY;
+       struct osd_device               *o = osd_dev(d);
+       int                             rc;
+       ENTRY;
 
-        switch(cfg->lcfg_command) {
-        case LCFG_SETUP:
-                err = osd_mount(env, o, cfg);
-                break;
-        case LCFG_CLEANUP:
+       switch (cfg->lcfg_command) {
+       case LCFG_SETUP:
+               rc = osd_mount(env, o, cfg);
+               break;
+       case LCFG_CLEANUP:
                lu_dev_del_linkage(d->ld_site, d);
-               err = osd_shutdown(env, o);
+               rc = osd_shutdown(env, o);
                break;
-        default:
-                err = -ENOSYS;
-        }
+       case LCFG_PARAM:
+               LASSERT(&o->od_dt_dev);
+               rc = class_process_proc_param(PARAM_OSD, lprocfs_osd_obd_vars,
+                                             cfg, &o->od_dt_dev);
+               if (rc > 0 || rc == -ENOSYS)
+                       rc = class_process_proc_param(PARAM_OST,
+                                                     lprocfs_osd_obd_vars,
+                                                     cfg, &o->od_dt_dev);
+               break;
+       default:
+               rc = -ENOSYS;
+       }
 
-        RETURN(err);
+       RETURN(rc);
 }
 
 static int osd_recovery_complete(const struct lu_env *env,
@@ -4666,9 +5887,9 @@ 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);
 }
@@ -4685,11 +5906,11 @@ 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 */
 
@@ -4705,15 +5926,6 @@ 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);
@@ -4769,17 +5981,28 @@ static struct obd_ops osd_obd_device_ops = {
 
 static int __init osd_mod_init(void)
 {
-        struct lprocfs_static_vars lvars;
+       int rc;
+
+       osd_oi_mod_init();
+
+       rc = lu_kmem_init(ldiskfs_caches);
+       if (rc)
+               return rc;
 
-        osd_oi_mod_init();
-        lprocfs_osd_init_vars(&lvars);
-        return class_register_type(&osd_obd_device_ops, NULL, lvars.module_vars,
-                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
+       rc = class_register_type(&osd_obd_device_ops, NULL, NULL,
+#ifndef HAVE_ONLY_PROCFS_SEQ
+                               lprocfs_osd_module_vars,
+#endif
+                               LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
+       if (rc)
+               lu_kmem_fini(ldiskfs_caches);
+       return rc;
 }
 
 static void __exit osd_mod_exit(void)
 {
        class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
+       lu_kmem_fini(ldiskfs_caches);
 }
 
 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");