Whamcloud - gitweb
LU-5223 lmv: build master LMV EA dynamically build via readdir
[fs/lustre-release.git] / lustre / mdt / mdt_handler.c
index 8f4c86d..f64795f 100644 (file)
@@ -280,15 +280,15 @@ static int mdt_getstatus(struct tgt_session_info *tsi)
                GOTO(out, rc = err_serious(-ENOMEM));
 
        repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
-       repbody->fid1 = mdt->mdt_md_root_fid;
-       repbody->valid |= OBD_MD_FLID;
+       repbody->mbo_fid1 = mdt->mdt_md_root_fid;
+       repbody->mbo_valid |= OBD_MD_FLID;
 
        if (tsi->tsi_tgt->lut_mds_capa &&
            exp_connect_flags(info->mti_exp) & OBD_CONNECT_MDS_CAPA) {
                struct mdt_object       *root;
                struct lustre_capa      *capa;
 
-               root = mdt_object_find(info->mti_env, mdt, &repbody->fid1);
+               root = mdt_object_find(info->mti_env, mdt, &repbody->mbo_fid1);
                if (IS_ERR(root))
                        GOTO(out, rc = PTR_ERR(root));
 
@@ -299,7 +299,7 @@ static int mdt_getstatus(struct tgt_session_info *tsi)
                                  0);
                 mdt_object_put(info->mti_env, root);
                 if (rc == 0)
-                        repbody->valid |= OBD_MD_FLMDSCAPA;
+                       repbody->mbo_valid |= OBD_MD_FLMDSCAPA;
         }
        EXIT;
 out:
@@ -383,9 +383,9 @@ static void mdt_pack_size2body(struct mdt_thread_info *info,
             !(ma->ma_valid & MA_SOM))
                 return;
 
-        b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
-        b->size = ma->ma_som->msd_size;
-        b->blocks = ma->ma_som->msd_blocks;
+       b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
+       b->mbo_size = ma->ma_som->msd_size;
+       b->mbo_blocks = ma->ma_som->msd_blocks;
 }
 
 void mdt_pack_attr2body(struct mdt_thread_info *info, struct mdt_body *b,
@@ -395,66 +395,68 @@ void mdt_pack_attr2body(struct mdt_thread_info *info, struct mdt_body *b,
 
         LASSERT(ma->ma_valid & MA_INODE);
 
-        b->atime      = attr->la_atime;
-        b->mtime      = attr->la_mtime;
-        b->ctime      = attr->la_ctime;
-        b->mode       = attr->la_mode;
-        b->size       = attr->la_size;
-        b->blocks     = attr->la_blocks;
-        b->uid        = attr->la_uid;
-        b->gid        = attr->la_gid;
-        b->flags      = attr->la_flags;
-        b->nlink      = attr->la_nlink;
-        b->rdev       = attr->la_rdev;
-
-        /*XXX should pack the reply body according to lu_valid*/
-        b->valid |= OBD_MD_FLCTIME | OBD_MD_FLUID   |
-                    OBD_MD_FLGID   | OBD_MD_FLTYPE  |
-                    OBD_MD_FLMODE  | OBD_MD_FLNLINK | OBD_MD_FLFLAGS |
-                    OBD_MD_FLATIME | OBD_MD_FLMTIME ;
-
-        if (!S_ISREG(attr->la_mode)) {
-                b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLRDEV;
+       b->mbo_atime      = attr->la_atime;
+       b->mbo_mtime      = attr->la_mtime;
+       b->mbo_ctime      = attr->la_ctime;
+       b->mbo_mode       = attr->la_mode;
+       b->mbo_size       = attr->la_size;
+       b->mbo_blocks     = attr->la_blocks;
+       b->mbo_uid      = attr->la_uid;
+       b->mbo_gid      = attr->la_gid;
+       b->mbo_flags      = attr->la_flags;
+       b->mbo_nlink      = attr->la_nlink;
+       b->mbo_rdev       = attr->la_rdev;
+
+       /* XXX should pack the reply body according to lu_valid */
+       b->mbo_valid |= OBD_MD_FLCTIME | OBD_MD_FLUID   |
+                       OBD_MD_FLGID   | OBD_MD_FLTYPE  |
+                       OBD_MD_FLMODE  | OBD_MD_FLNLINK | OBD_MD_FLFLAGS |
+                       OBD_MD_FLATIME | OBD_MD_FLMTIME ;
+
+       if (!S_ISREG(attr->la_mode)) {
+               b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | OBD_MD_FLRDEV;
        } else if (ma->ma_need & MA_LOV && !(ma->ma_valid & MA_LOV)) {
-                /* means no objects are allocated on osts. */
-                LASSERT(!(ma->ma_valid & MA_LOV));
-                /* just ignore blocks occupied by extend attributes on MDS */
-                b->blocks = 0;
-                /* if no object is allocated on osts, the size on mds is valid. b=22272 */
-                b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
+               /* means no objects are allocated on osts. */
+               LASSERT(!(ma->ma_valid & MA_LOV));
+               /* just ignore blocks occupied by extend attributes on MDS */
+               b->mbo_blocks = 0;
+               /* if no object is allocated on osts, the size on mds is valid.
+                * b=22272 */
+               b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
        } else if ((ma->ma_valid & MA_LOV) && ma->ma_lmm != NULL &&
                   ma->ma_lmm->lmm_pattern & LOV_PATTERN_F_RELEASED) {
                /* A released file stores its size on MDS. */
                /* But return 1 block for released file, unless tools like tar
                 * will consider it fully sparse. (LU-3864)
                 */
-               if (unlikely(b->size == 0))
-                       b->blocks = 0;
+               if (unlikely(b->mbo_size == 0))
+                       b->mbo_blocks = 0;
                else
-                       b->blocks = 1;
-               b->valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
+                       b->mbo_blocks = 1;
+               b->mbo_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
        }
 
-        if (fid) {
-                b->fid1 = *fid;
-                b->valid |= OBD_MD_FLID;
-                CDEBUG(D_INODE, DFID": nlink=%d, mode=%o, size="LPU64"\n",
-                                PFID(fid), b->nlink, b->mode, b->size);
-        }
+       if (fid) {
+               b->mbo_fid1 = *fid;
+               b->mbo_valid |= OBD_MD_FLID;
+               CDEBUG(D_INODE, DFID": nlink=%d, mode=%o, size="LPU64"\n",
+                               PFID(fid), b->mbo_nlink,
+                      b->mbo_mode, b->mbo_size);
+       }
 
-        if (info)
-                mdt_body_reverse_idmap(info, b);
+       if (info)
+               mdt_body_reverse_idmap(info, b);
 
-       if (fid != NULL && (b->valid & OBD_MD_FLSIZE))
-                CDEBUG(D_VFSTRACE, DFID": returning size %llu\n",
-                       PFID(fid), (unsigned long long)b->size);
+       if (fid != NULL && (b->mbo_valid & OBD_MD_FLSIZE))
+               CDEBUG(D_VFSTRACE, DFID": returning size %llu\n",
+                      PFID(fid), (unsigned long long)b->mbo_size);
 }
 
 static inline int mdt_body_has_lov(const struct lu_attr *la,
-                                   const struct mdt_body *body)
+                                  const struct mdt_body *body)
 {
-        return ((S_ISREG(la->la_mode) && (body->valid & OBD_MD_FLEASIZE)) ||
-                (S_ISDIR(la->la_mode) && (body->valid & OBD_MD_FLDIREA )) );
+       return (S_ISREG(la->la_mode) && (body->mbo_valid & OBD_MD_FLEASIZE)) ||
+              (S_ISDIR(la->la_mode) && (body->mbo_valid & OBD_MD_FLDIREA));
 }
 
 void mdt_client_compatibility(struct mdt_thread_info *info)
@@ -500,6 +502,12 @@ int mdt_attr_get_eabuf_size(struct mdt_thread_info *info, struct mdt_object *o)
        if (S_ISDIR(lu_object_attr(&mdt_object_child(o)->mo_lu))) {
                rc2 = mo_xattr_get(env, mdt_object_child(o), &LU_BUF_NULL,
                                   XATTR_NAME_LMV);
+
+               if (rc2 == -ENODATA)
+                       rc2 = mo_xattr_get(env, mdt_object_child(o),
+                                          &LU_BUF_NULL,
+                                          XATTR_NAME_DEFAULT_LMV);
+
                if ((rc2 < 0 && rc2 != -ENODATA) || (rc2 > rc))
                        rc = rc2;
        }
@@ -543,8 +551,6 @@ int mdt_big_xattr_get(struct mdt_thread_info *info, struct mdt_object *o,
        info->mti_buf.lb_buf = info->mti_big_lmm;
        info->mti_buf.lb_len = info->mti_big_lmmsize;
        rc = mo_xattr_get(env, mdt_object_child(o), &info->mti_buf, name);
-       if (rc > 0)
-               info->mti_big_lmm_used = 1;
 
        RETURN(rc);
 }
@@ -574,10 +580,26 @@ int mdt_stripe_get(struct mdt_thread_info *info, struct mdt_object *o,
 
        rc = mo_xattr_get(info->mti_env, next, buf, name);
        if (rc > 0) {
+
+got:
                if (strcmp(name, XATTR_NAME_LOV) == 0) {
-                       ma->ma_lmm_size = rc;
-                       ma->ma_valid |= MA_LOV;
+                       if (info->mti_big_lmm_used)
+                               ma->ma_lmm = info->mti_big_lmm;
+
+                       /* NOT return LOV EA with hole to old client. */
+                       if (unlikely(le32_to_cpu(ma->ma_lmm->lmm_pattern) &
+                                    LOV_PATTERN_F_HOLE) &&
+                           !(exp_connect_flags(info->mti_exp) &
+                             OBD_CONNECT_LFSCK)) {
+                               return -EIO;
+                       } else {
+                               ma->ma_lmm_size = rc;
+                               ma->ma_valid |= MA_LOV;
+                       }
                } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
+                       if (info->mti_big_lmm_used)
+                               ma->ma_lmv = info->mti_big_lmm;
+
                        ma->ma_lmv_size = rc;
                        ma->ma_valid |= MA_LMV;
                } else if (strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0) {
@@ -585,6 +607,10 @@ int mdt_stripe_get(struct mdt_thread_info *info, struct mdt_object *o,
                        ma->ma_valid |= MA_LMV_DEF;
                }
 
+               /* Update mdt_max_mdsize so all clients will be aware that */
+               if (info->mti_mdt->mdt_max_mdsize < rc)
+                       info->mti_mdt->mdt_max_mdsize = rc;
+
                rc = 0;
        } else if (rc == -ENODATA) {
                /* no LOV EA */
@@ -596,23 +622,8 @@ int mdt_stripe_get(struct mdt_thread_info *info, struct mdt_object *o,
                        return rc;
                rc = mdt_big_xattr_get(info, o, name);
                if (rc > 0) {
-                       if (!strcmp(name, XATTR_NAME_LOV)) {
-                               ma->ma_valid |= MA_LOV;
-                               ma->ma_lmm = info->mti_big_lmm;
-                               ma->ma_lmm_size = rc;
-                       } else if (!strcmp(name, XATTR_NAME_LMV)) {
-                               ma->ma_valid |= MA_LMV;
-                               ma->ma_lmv = info->mti_big_lmm;
-                               ma->ma_lmv_size = rc;
-                       } else {
-                               return -EINVAL;
-                       }
-
-                       /* update mdt_max_mdsize so all clients
-                        * will be aware about that */
-                       if (info->mti_mdt->mdt_max_mdsize < rc)
-                               info->mti_mdt->mdt_max_mdsize = rc;
-                       rc = 0;
+                       info->mti_big_lmm_used = 1;
+                       goto got;
                }
        }
 
@@ -786,16 +797,16 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
 
        if (mdt_object_remote(o)) {
                /* This object is located on remote node.*/
-               /* Return -EIO for old client */
+               /* Return -ENOTSUPP for old client */
                if (!mdt_is_dne_client(req->rq_export))
-                       GOTO(out, rc = -EIO);
+                       GOTO(out, rc = -ENOTSUPP);
 
-               repbody->fid1 = *mdt_object_fid(o);
-               repbody->valid = OBD_MD_FLID | OBD_MD_MDS;
+               repbody->mbo_fid1 = *mdt_object_fid(o);
+               repbody->mbo_valid = OBD_MD_FLID | OBD_MD_MDS;
                GOTO(out, rc = 0);
        }
 
-       if (reqbody->eadatasize > 0) {
+       if (reqbody->mbo_eadatasize > 0) {
                buffer->lb_buf = req_capsule_server_get(pill, &RMF_MDT_MD);
                if (buffer->lb_buf == NULL)
                        GOTO(out, rc = -EPROTO);
@@ -812,15 +823,15 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
 
        /* If it is dir object and client require MEA, then we got MEA */
        if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
-           (reqbody->valid & (OBD_MD_MEA | OBD_MD_DEFAULT_MEA))) {
+           (reqbody->mbo_valid & (OBD_MD_MEA | OBD_MD_DEFAULT_MEA))) {
                /* Assumption: MDT_MD size is enough for lmv size. */
                ma->ma_lmv = buffer->lb_buf;
                ma->ma_lmv_size = buffer->lb_len;
                ma->ma_need = MA_INODE;
                if (ma->ma_lmv_size > 0) {
-                       if (reqbody->valid & OBD_MD_MEA)
+                       if (reqbody->mbo_valid & OBD_MD_MEA)
                                ma->ma_need |= MA_LMV;
-                       else if (reqbody->valid & OBD_MD_DEFAULT_MEA)
+                       else if (reqbody->mbo_valid & OBD_MD_DEFAULT_MEA)
                                ma->ma_need |= MA_LMV_DEF;
                }
        } else {
@@ -832,7 +843,7 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
        }
 
         if (S_ISDIR(lu_object_attr(&next->mo_lu)) &&
-            reqbody->valid & OBD_MD_FLDIREA  &&
+           reqbody->mbo_valid & OBD_MD_FLDIREA  &&
             lustre_msg_get_opc(req->rq_reqmsg) == MDS_GETATTR) {
                 /* get default stripe info for this dir. */
                 ma->ma_need |= MA_LOV_DEF;
@@ -852,8 +863,8 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
        /* if file is released, check if a restore is running */
        if ((ma->ma_valid & MA_HSM) && (ma->ma_hsm.mh_flags & HS_RELEASED) &&
            mdt_hsm_restore_is_running(info, mdt_object_fid(o))) {
-               repbody->t_state = MS_RESTORE;
-               repbody->valid |= OBD_MD_TSTATE;
+               repbody->mbo_t_state = MS_RESTORE;
+               repbody->mbo_valid |= OBD_MD_TSTATE;
        }
 
        is_root = lu_fid_eq(mdt_object_fid(o), &info->mti_mdt->mdt_md_root_fid);
@@ -890,30 +901,38 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
         if (mdt_body_has_lov(la, reqbody)) {
                 if (ma->ma_valid & MA_LOV) {
                         LASSERT(ma->ma_lmm_size);
-                        repbody->eadatasize = ma->ma_lmm_size;
-                        if (S_ISDIR(la->la_mode))
-                                repbody->valid |= OBD_MD_FLDIREA;
-                        else
-                                repbody->valid |= OBD_MD_FLEASIZE;
-                        mdt_dump_lmm(D_INFO, ma->ma_lmm, repbody->valid);
+                       repbody->mbo_eadatasize = ma->ma_lmm_size;
+                       if (S_ISDIR(la->la_mode))
+                               repbody->mbo_valid |= OBD_MD_FLDIREA;
+                       else
+                               repbody->mbo_valid |= OBD_MD_FLEASIZE;
+                       mdt_dump_lmm(D_INFO, ma->ma_lmm, repbody->mbo_valid);
                 }
                if (ma->ma_valid & MA_LMV) {
+                       /* Return -ENOTSUPP for old client */
+                       if (!mdt_is_striped_client(req->rq_export))
+                               RETURN(-ENOTSUPP);
+
                        LASSERT(S_ISDIR(la->la_mode));
                        mdt_dump_lmv(D_INFO, ma->ma_lmv);
-                       repbody->eadatasize = ma->ma_lmv_size;
-                       repbody->valid |= (OBD_MD_FLDIREA|OBD_MD_MEA);
+                       repbody->mbo_eadatasize = ma->ma_lmv_size;
+                       repbody->mbo_valid |= (OBD_MD_FLDIREA|OBD_MD_MEA);
                }
                if (ma->ma_valid & MA_LMV_DEF) {
+                       /* Return -ENOTSUPP for old client */
+                       if (!mdt_is_striped_client(req->rq_export))
+                               RETURN(-ENOTSUPP);
                        LASSERT(S_ISDIR(la->la_mode));
-                       repbody->eadatasize = ma->ma_lmv_size;
-                       repbody->valid |= (OBD_MD_FLDIREA|OBD_MD_DEFAULT_MEA);
+                       repbody->mbo_eadatasize = ma->ma_lmv_size;
+                       repbody->mbo_valid |= (OBD_MD_FLDIREA |
+                                              OBD_MD_DEFAULT_MEA);
                }
        } else if (S_ISLNK(la->la_mode) &&
-                  reqbody->valid & OBD_MD_LINKNAME) {
+                  reqbody->mbo_valid & OBD_MD_LINKNAME) {
                buffer->lb_buf = ma->ma_lmm;
                /* eadatasize from client includes NULL-terminator, so
                 * there is no need to read it */
-               buffer->lb_len = reqbody->eadatasize - 1;
+               buffer->lb_len = reqbody->mbo_eadatasize - 1;
                rc = mo_readlink(env, next, buffer);
                if (unlikely(rc <= 0)) {
                        CERROR("%s: readlink failed for "DFID": rc = %d\n",
@@ -925,16 +944,16 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
 
                        if (OBD_FAIL_CHECK(OBD_FAIL_MDS_READLINK_EPROTO))
                                rc -= 2;
-                       repbody->valid |= OBD_MD_LINKNAME;
+                       repbody->mbo_valid |= OBD_MD_LINKNAME;
                        /* we need to report back size with NULL-terminator
                         * because client expects that */
-                       repbody->eadatasize = rc + 1;
-                       if (repbody->eadatasize != reqbody->eadatasize)
+                       repbody->mbo_eadatasize = rc + 1;
+                       if (repbody->mbo_eadatasize != reqbody->mbo_eadatasize)
                                CDEBUG(D_INODE, "%s: Read shorter symlink %d "
                                       "on "DFID ", expected %d\n",
                                       mdt_obd_name(info->mti_mdt),
                                       rc, PFID(mdt_object_fid(o)),
-                                      reqbody->eadatasize - 1);
+                                      reqbody->mbo_eadatasize - 1);
                        /* NULL terminate */
                        ((char *)ma->ma_lmm)[rc] = 0;
 
@@ -948,33 +967,33 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
                 }
         }
 
-        if (reqbody->valid & OBD_MD_FLMODEASIZE) {
-               repbody->max_cookiesize = 0;
-                repbody->max_mdsize = info->mti_mdt->mdt_max_mdsize;
-                repbody->valid |= OBD_MD_FLMODEASIZE;
-                CDEBUG(D_INODE, "I am going to change the MAX_MD_SIZE & "
-                       "MAX_COOKIE to : %d:%d\n", repbody->max_mdsize,
-                       repbody->max_cookiesize);
-        }
+       if (reqbody->mbo_valid & OBD_MD_FLMODEASIZE) {
+               repbody->mbo_max_cookiesize = 0;
+               repbody->mbo_max_mdsize = info->mti_mdt->mdt_max_mdsize;
+               repbody->mbo_valid |= OBD_MD_FLMODEASIZE;
+               CDEBUG(D_INODE, "I am going to change the MAX_MD_SIZE & "
+                      "MAX_COOKIE to : %d:%d\n", repbody->mbo_max_mdsize,
+                      repbody->mbo_max_cookiesize);
+       }
 
-        if (exp_connect_rmtclient(info->mti_exp) &&
-            reqbody->valid & OBD_MD_FLRMTPERM) {
-                void *buf = req_capsule_server_get(pill, &RMF_ACL);
+       if (exp_connect_rmtclient(info->mti_exp) &&
+           reqbody->mbo_valid & OBD_MD_FLRMTPERM) {
+               void *buf = req_capsule_server_get(pill, &RMF_ACL);
 
-                /* mdt_getattr_lock only */
-                rc = mdt_pack_remote_perm(info, o, buf);
-                if (rc) {
-                        repbody->valid &= ~OBD_MD_FLRMTPERM;
-                        repbody->aclsize = 0;
-                        RETURN(rc);
-                } else {
-                        repbody->valid |= OBD_MD_FLRMTPERM;
-                        repbody->aclsize = sizeof(struct mdt_remote_perm);
-                }
-        }
+               /* mdt_getattr_lock only */
+               rc = mdt_pack_remote_perm(info, o, buf);
+               if (rc) {
+                       repbody->mbo_valid &= ~OBD_MD_FLRMTPERM;
+                       repbody->mbo_aclsize = 0;
+                       RETURN(rc);
+               } else {
+                       repbody->mbo_valid |= OBD_MD_FLRMTPERM;
+                       repbody->mbo_aclsize = sizeof(struct mdt_remote_perm);
+               }
+       }
 #ifdef CONFIG_FS_POSIX_ACL
        else if ((exp_connect_flags(req->rq_export) & OBD_CONNECT_ACL) &&
-                (reqbody->valid & OBD_MD_FLACL)) {
+                (reqbody->mbo_valid & OBD_MD_FLACL)) {
                 buffer->lb_buf = req_capsule_server_get(pill, &RMF_ACL);
                 buffer->lb_len = req_capsule_get_size(pill,
                                                       &RMF_ACL, RCL_SERVER);
@@ -983,8 +1002,8 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
                                           XATTR_NAME_ACL_ACCESS);
                         if (rc < 0) {
                                 if (rc == -ENODATA) {
-                                        repbody->aclsize = 0;
-                                        repbody->valid |= OBD_MD_FLACL;
+                                       repbody->mbo_aclsize = 0;
+                                       repbody->mbo_valid |= OBD_MD_FLACL;
                                         rc = 0;
                                 } else if (rc == -EOPNOTSUPP) {
                                         rc = 0;
@@ -995,15 +1014,15 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
                                               PFID(mdt_object_fid(o)), rc);
                                }
                         } else {
-                                repbody->aclsize = rc;
-                                repbody->valid |= OBD_MD_FLACL;
-                                rc = 0;
-                        }
-                }
-        }
+                               repbody->mbo_aclsize = rc;
+                               repbody->mbo_valid |= OBD_MD_FLACL;
+                               rc = 0;
+                       }
+               }
+       }
 #endif
 
-       if (reqbody->valid & OBD_MD_FLMDSCAPA &&
+       if (reqbody->mbo_valid & OBD_MD_FLMDSCAPA &&
            info->mti_mdt->mdt_lut.lut_mds_capa &&
            exp_connect_flags(info->mti_exp) & OBD_CONNECT_MDS_CAPA) {
                 struct lustre_capa *capa;
@@ -1014,7 +1033,7 @@ static int mdt_getattr_internal(struct mdt_thread_info *info,
                 rc = mo_capa_get(env, next, capa, 0);
                 if (rc)
                         RETURN(rc);
-                repbody->valid |= OBD_MD_FLMDSCAPA;
+               repbody->mbo_valid |= OBD_MD_FLMDSCAPA;
         }
 
 out:
@@ -1052,7 +1071,7 @@ static int mdt_renew_capa(struct mdt_thread_info *info)
         *capa = *c;
         rc = mo_capa_get(info->mti_env, mdt_object_child(obj), capa, 1);
         if (rc == 0)
-                body->valid |= OBD_MD_FLOSSCAPA;
+               body->mbo_valid |= OBD_MD_FLOSSCAPA;
         RETURN(rc);
 }
 
@@ -1069,7 +1088,7 @@ static int mdt_getattr(struct tgt_session_info *tsi)
         reqbody = req_capsule_client_get(pill, &RMF_MDT_BODY);
         LASSERT(reqbody);
 
-        if (reqbody->valid & OBD_MD_FLOSSCAPA) {
+       if (reqbody->mbo_valid & OBD_MD_FLOSSCAPA) {
                 rc = req_capsule_server_pack(pill);
                 if (unlikely(rc))
                         RETURN(err_serious(rc));
@@ -1085,7 +1104,7 @@ static int mdt_getattr(struct tgt_session_info *tsi)
         * guess at EA size by just reading it from disk.
         * Exceptions are readdir and (missing) directory striping */
        /* Readlink */
-       if (reqbody->valid & OBD_MD_LINKNAME) {
+       if (reqbody->mbo_valid & OBD_MD_LINKNAME) {
                /* No easy way to know how long is the symlink, but it cannot
                 * be more than PATH_MAX, so we allocate +1 */
                rc = PATH_MAX + 1;
@@ -1095,7 +1114,7 @@ static int mdt_getattr(struct tgt_session_info *tsi)
         */
        } else if (lu_fid_eq(mdt_object_fid(obj),
                             &info->mti_mdt->mdt_md_root_fid) &&
-                  (reqbody->valid & OBD_MD_FLDIREA) &&
+                  (reqbody->mbo_valid & OBD_MD_FLDIREA) &&
                   (lustre_msg_get_opc(mdt_info_req(info)->rq_reqmsg) ==
                                                                 MDS_GETATTR)) {
                /* Should the default strping be bigger, mdt_fix_reply
@@ -1117,25 +1136,25 @@ static int mdt_getattr(struct tgt_session_info *tsi)
 
         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
         LASSERT(repbody != NULL);
-        repbody->eadatasize = 0;
-        repbody->aclsize = 0;
+       repbody->mbo_eadatasize = 0;
+       repbody->mbo_aclsize = 0;
 
-        if (reqbody->valid & OBD_MD_FLRMTPERM)
-                rc = mdt_init_ucred(info, reqbody);
-        else
-                rc = mdt_check_ucred(info);
-        if (unlikely(rc))
-                GOTO(out_shrink, rc);
+       if (reqbody->mbo_valid & OBD_MD_FLRMTPERM)
+               rc = mdt_init_ucred(info, reqbody);
+       else
+               rc = mdt_check_ucred(info);
+       if (unlikely(rc))
+               GOTO(out_shrink, rc);
 
-        info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
+       info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
 
-        /*
-         * Don't check capability at all, because rename might getattr for
-         * remote obj, and at that time no capability is available.
-         */
-        mdt_set_capainfo(info, 1, &reqbody->fid1, BYPASS_CAPA);
-        rc = mdt_getattr_internal(info, obj, 0);
-        if (reqbody->valid & OBD_MD_FLRMTPERM)
+       /*
+        * Don't check capability at all, because rename might getattr for
+        * remote obj, and at that time no capability is available.
+        */
+       mdt_set_capainfo(info, 1, &reqbody->mbo_fid1, BYPASS_CAPA);
+       rc = mdt_getattr_internal(info, obj, 0);
+       if (reqbody->mbo_valid & OBD_MD_FLRMTPERM)
                 mdt_exit_ucred(info);
         EXIT;
 out_shrink:
@@ -1148,35 +1167,6 @@ out:
        return rc;
 }
 
-static int mdt_is_subdir(struct tgt_session_info *tsi)
-{
-       struct mdt_thread_info  *info = tsi2mdt_info(tsi);
-        struct mdt_object     *o = info->mti_object;
-        struct req_capsule    *pill = info->mti_pill;
-        const struct mdt_body *body = info->mti_body;
-        struct mdt_body       *repbody;
-        int                    rc;
-        ENTRY;
-
-        LASSERT(o != NULL);
-
-        repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
-
-       /*
-        * We save last checked parent fid to @repbody->fid1 for remote
-        * directory case.
-        */
-       LASSERT(fid_is_sane(&body->fid2));
-       LASSERT(mdt_object_exists(o) && !mdt_object_remote(o));
-       rc = mdo_is_subdir(info->mti_env, mdt_object_child(o),
-                          &body->fid2, &repbody->fid1);
-       if (rc == 0 || rc == -EREMOTE)
-               repbody->valid |= OBD_MD_FLID;
-
-       mdt_thread_info_fini(info);
-       RETURN(rc);
-}
-
 static int mdt_swap_layouts(struct tgt_session_info *tsi)
 {
        struct mdt_thread_info  *info;
@@ -1204,25 +1194,25 @@ static int mdt_swap_layouts(struct tgt_session_info *tsi)
                ldlm_request_cancel(req, info->mti_dlm_req, 0);
 
        if (req_capsule_get_size(info->mti_pill, &RMF_CAPA1, RCL_CLIENT))
-               mdt_set_capainfo(info, 0, &info->mti_body->fid1,
+               mdt_set_capainfo(info, 0, &info->mti_body->mbo_fid1,
                                 req_capsule_client_get(info->mti_pill,
                                                        &RMF_CAPA1));
 
        if (req_capsule_get_size(info->mti_pill, &RMF_CAPA2, RCL_CLIENT))
-               mdt_set_capainfo(info, 1, &info->mti_body->fid2,
+               mdt_set_capainfo(info, 1, &info->mti_body->mbo_fid2,
                                 req_capsule_client_get(info->mti_pill,
                                                        &RMF_CAPA2));
 
        o1 = info->mti_object;
        o = o2 = mdt_object_find(info->mti_env, info->mti_mdt,
-                               &info->mti_body->fid2);
+                               &info->mti_body->mbo_fid2);
        if (IS_ERR(o))
                GOTO(out, rc = PTR_ERR(o));
 
        if (mdt_object_remote(o) || !mdt_object_exists(o)) /* remote object */
                GOTO(put, rc = -ENOENT);
 
-       rc = lu_fid_cmp(&info->mti_body->fid1, &info->mti_body->fid2);
+       rc = lu_fid_cmp(&info->mti_body->mbo_fid1, &info->mti_body->mbo_fid2);
        if (unlikely(rc == 0)) /* same file, you kidding me? no-op. */
                GOTO(put, rc);
 
@@ -1286,7 +1276,7 @@ static int mdt_raw_lookup(struct mdt_thread_info *info,
         int rc;
         ENTRY;
 
-        if (reqbody->valid != OBD_MD_FLID)
+       if (reqbody->mbo_valid != OBD_MD_FLID)
                 RETURN(0);
 
         LASSERT(!info->mti_cross_ref);
@@ -1308,8 +1298,8 @@ static int mdt_raw_lookup(struct mdt_thread_info *info,
 #endif
         if (rc == 0) {
                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
-                repbody->fid1 = *child_fid;
-                repbody->valid = OBD_MD_FLID;
+               repbody->mbo_fid1 = *child_fid;
+               repbody->mbo_valid = OBD_MD_FLID;
         }
         RETURN(1);
 }
@@ -1355,15 +1345,10 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                       "ldlm_rep = %p\n",
                       PFID(mdt_object_fid(child)), ldlm_rep);
 
-               if (is_resent) {
-                       /* Do not take lock for resent case. */
-                       lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
-                       LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
-                                lhc->mlh_reg_lh.cookie);
-                       LASSERT(fid_res_name_eq(mdt_object_fid(child),
-                                               &lock->l_resource->lr_name));
-                       LDLM_LOCK_PUT(lock);
-               } else {
+               rc = mdt_check_resent_lock(info, child, lhc);
+               if (rc < 0) {
+                       RETURN(-EPROTO);
+               } else if (rc > 0) {
                        mdt_lock_handle_init(lhc);
                        mdt_lock_reg_init(lhc, LCK_PR);
 
@@ -1410,7 +1395,7 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                if (unlikely(reqbody == NULL))
                        RETURN(err_serious(-EPROTO));
 
-               *child_fid = reqbody->fid2;
+               *child_fid = reqbody->mbo_fid2;
 
                if (unlikely(!fid_is_sane(child_fid)))
                        RETURN(err_serious(-EINVAL));
@@ -1418,7 +1403,7 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
                CDEBUG(D_INODE, "getattr with lock for "DFID"/"DFID", "
                       "ldlm_rep = %p\n",
                       PFID(mdt_object_fid(parent)),
-                      PFID(&reqbody->fid2), ldlm_rep);
+                      PFID(&reqbody->mbo_fid2), ldlm_rep);
        }
 
        mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_EXECD);
@@ -1488,30 +1473,11 @@ static int mdt_getattr_name_lock(struct mdt_thread_info *info,
 
        if (unlikely(IS_ERR(child)))
                GOTO(out_parent, rc = PTR_ERR(child));
-       if (is_resent) {
-               /* Do not take lock for resent case. */
-               lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
-               LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
-                        lhc->mlh_reg_lh.cookie);
 
-               if (!fid_res_name_eq(mdt_object_fid(child),
-                                    &lock->l_resource->lr_name)) {
-                       LASSERTF(fid_res_name_eq(mdt_object_fid(parent),
-                                                &lock->l_resource->lr_name),
-                                "Lock res_id: "DLDLMRES", fid: "DFID"\n",
-                                PLDLMRES(lock->l_resource),
-                                PFID(mdt_object_fid(parent)));
-                       CWARN("Although resent, but still not get child lock"
-                             "parent:"DFID" child:"DFID"\n",
-                             PFID(mdt_object_fid(parent)),
-                             PFID(mdt_object_fid(child)));
-                       lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
-                       LDLM_LOCK_PUT(lock);
-                       GOTO(relock, 0);
-               }
-               LDLM_LOCK_PUT(lock);
-       } else {
-relock:
+       rc = mdt_check_resent_lock(info, child, lhc);
+       if (rc < 0) {
+               GOTO(out_child, rc);
+       } else if (rc > 0) {
                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_RESEND, obd_timeout*2);
                 mdt_lock_handle_init(lhc);
                mdt_lock_reg_init(lhc, LCK_PR);
@@ -1633,9 +1599,9 @@ static int mdt_getattr_name(struct tgt_session_info *tsi)
         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
         LASSERT(repbody != NULL);
 
-        info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
-        repbody->eadatasize = 0;
-        repbody->aclsize = 0;
+       info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
+       repbody->mbo_eadatasize = 0;
+       repbody->mbo_aclsize = 0;
 
         rc = mdt_init_ucred(info, reqbody);
         if (unlikely(rc))
@@ -1742,17 +1708,17 @@ static int mdt_readpage(struct tgt_session_info *tsi)
          * reqbody->size contains offset of where to start to read and
          * reqbody->nlink contains number bytes to read.
          */
-        rdpg->rp_hash = reqbody->size;
-        if (rdpg->rp_hash != reqbody->size) {
-                CERROR("Invalid hash: "LPX64" != "LPX64"\n",
-                       rdpg->rp_hash, reqbody->size);
-                RETURN(-EFAULT);
-        }
+       rdpg->rp_hash = reqbody->mbo_size;
+       if (rdpg->rp_hash != reqbody->mbo_size) {
+               CERROR("Invalid hash: "LPX64" != "LPX64"\n",
+                      rdpg->rp_hash, reqbody->mbo_size);
+               RETURN(-EFAULT);
+       }
 
-        rdpg->rp_attrs = reqbody->mode;
+       rdpg->rp_attrs = reqbody->mbo_mode;
        if (exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_64BITHASH)
                rdpg->rp_attrs |= LUDA_64BITHASH;
-       rdpg->rp_count  = min_t(unsigned int, reqbody->nlink,
+       rdpg->rp_count  = min_t(unsigned int, reqbody->mbo_nlink,
                                exp_max_brw_size(tsi->tsi_exp));
        rdpg->rp_npages = (rdpg->rp_count + PAGE_CACHE_SIZE - 1) >>
                          PAGE_CACHE_SHIFT;
@@ -1822,8 +1788,8 @@ static int mdt_reint_internal(struct mdt_thread_info *info,
         if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_SERVER)) {
                 repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
                 LASSERT(repbody);
-                repbody->eadatasize = 0;
-                repbody->aclsize = 0;
+               repbody->mbo_eadatasize = 0;
+               repbody->mbo_aclsize = 0;
         }
 
         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_REINT_DELAY, 10);
@@ -1960,7 +1926,7 @@ static int mdt_sync(struct tgt_session_info *tsi)
        if (OBD_FAIL_CHECK(OBD_FAIL_MDS_SYNC_PACK))
                RETURN(err_serious(-ENOMEM));
 
-       if (fid_seq(&tsi->tsi_mdt_body->fid1) == 0) {
+       if (fid_seq(&tsi->tsi_mdt_body->mbo_fid1) == 0) {
                rc = mdt_device_sync(tsi->tsi_env, mdt_exp2dev(tsi->tsi_exp));
        } else {
                struct mdt_thread_info *info = tsi2mdt_info(tsi);
@@ -2345,6 +2311,35 @@ int mdt_remote_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
        RETURN(0);
 }
 
+int mdt_check_resent_lock(struct mdt_thread_info *info,
+                         struct mdt_object *mo,
+                         struct mdt_lock_handle *lhc)
+{
+       /* the lock might already be gotten in ldlm_handle_enqueue() */
+       if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
+               struct ptlrpc_request *req = mdt_info_req(info);
+               struct ldlm_lock      *lock;
+
+               lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
+               LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
+               LASSERTF(lock != NULL, "Invalid lock handle "LPX64"\n",
+                        lhc->mlh_reg_lh.cookie);
+
+               if (!fid_res_name_eq(mdt_object_fid(mo),
+                                    &lock->l_resource->lr_name)) {
+                       CWARN("%s: Although resent, but still not "
+                             "get child lock:"DFID"\n",
+                             info->mti_exp->exp_obd->obd_name,
+                             PFID(mdt_object_fid(mo)));
+                       LDLM_LOCK_PUT(lock);
+                       RETURN(-EPROTO);
+               }
+               LDLM_LOCK_PUT(lock);
+               return 0;
+       }
+       return 1;
+}
+
 int mdt_remote_object_lock(struct mdt_thread_info *mti,
                           struct mdt_object *o, const struct lu_fid *fid,
                           struct lustre_handle *lh, ldlm_mode_t mode,
@@ -2688,11 +2683,11 @@ static int mdt_body_unpack(struct mdt_thread_info *info, __u32 flags)
         if (body == NULL)
                 RETURN(-EFAULT);
 
-        if (!(body->valid & OBD_MD_FLID))
-                RETURN(0);
+       if (!(body->mbo_valid & OBD_MD_FLID))
+               RETURN(0);
 
-        if (!fid_is_sane(&body->fid1)) {
-                CERROR("Invalid fid: "DFID"\n", PFID(&body->fid1));
+       if (!fid_is_sane(&body->mbo_fid1)) {
+               CERROR("Invalid fid: "DFID"\n", PFID(&body->mbo_fid1));
                 RETURN(-EINVAL);
         }
 
@@ -2703,17 +2698,17 @@ static int mdt_body_unpack(struct mdt_thread_info *info, __u32 flags)
          */
         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_CLIENT) &&
             req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
-                mdt_set_capainfo(info, 0, &body->fid1,
-                                 req_capsule_client_get(pill, &RMF_CAPA1));
-
-        obj = mdt_object_find(env, info->mti_mdt, &body->fid1);
-        if (!IS_ERR(obj)) {
-                if ((flags & HABEO_CORPUS) &&
-                    !mdt_object_exists(obj)) {
-                        mdt_object_put(env, obj);
-                        /* for capability renew ENOENT will be handled in
-                         * mdt_renew_capa */
-                        if (body->valid & OBD_MD_FLOSSCAPA)
+               mdt_set_capainfo(info, 0, &body->mbo_fid1,
+                                req_capsule_client_get(pill, &RMF_CAPA1));
+
+       obj = mdt_object_find(env, info->mti_mdt, &body->mbo_fid1);
+       if (!IS_ERR(obj)) {
+               if ((flags & HABEO_CORPUS) &&
+                   !mdt_object_exists(obj)) {
+                       mdt_object_put(env, obj);
+                       /* for capability renew ENOENT will be handled in
+                        * mdt_renew_capa */
+                       if (body->mbo_valid & OBD_MD_FLOSSCAPA)
                                 rc = 0;
                         else
                                 rc = -ENOENT;
@@ -2863,7 +2858,8 @@ struct mdt_thread_info *tsi2mdt_info(struct tgt_session_info *tsi)
                if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_CLIENT) &&
                    req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT) > 0) {
                        lc = req_capsule_client_get(pill, &RMF_CAPA1);
-                       mdt_set_capainfo(mti, 0, &tsi->tsi_mdt_body->fid1, lc);
+                       mdt_set_capainfo(mti, 0, &tsi->tsi_mdt_body->mbo_fid1,
+                                        lc);
                }
        }
        mti->mti_body = tsi->tsi_mdt_body;
@@ -3000,19 +2996,17 @@ static struct mdt_it_flavor {
 };
 
 static int
-mdt_intent_lock_replace(struct mdt_thread_info *info, struct ldlm_lock **lockp,
-                       struct ldlm_lock *new_lock, struct mdt_lock_handle *lh,
+mdt_intent_lock_replace(struct mdt_thread_info *info,
+                       struct ldlm_lock **lockp,
+                       struct mdt_lock_handle *lh,
                        __u64 flags)
 {
         struct ptlrpc_request  *req = mdt_info_req(info);
         struct ldlm_lock       *lock = *lockp;
+       struct ldlm_lock       *new_lock;
 
-        /*
-         * Get new lock only for cases when possible resent did not find any
-         * lock.
-         */
-        if (new_lock == NULL)
-                new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
+       /* If possible resent found a lock, @lh is set to its handle */
+       new_lock = ldlm_handle2lock_long(&lh->mlh_reg_lh, 0);
 
         if (new_lock == NULL && (flags & LDLM_FL_INTENT_ONLY)) {
                 lh->mlh_reg_lh.cookie = 0;
@@ -3044,6 +3038,8 @@ mdt_intent_lock_replace(struct mdt_thread_info *info, struct ldlm_lock **lockp,
                  */
                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) &
                         MSG_RESENT);
+
+               LDLM_LOCK_RELEASE(new_lock);
                 lh->mlh_reg_lh.cookie = 0;
                 RETURN(ELDLM_LOCK_REPLACED);
         }
@@ -3085,52 +3081,30 @@ mdt_intent_lock_replace(struct mdt_thread_info *info, struct ldlm_lock **lockp,
 
 static void mdt_intent_fixup_resent(struct mdt_thread_info *info,
                                    struct ldlm_lock *new_lock,
-                                   struct ldlm_lock **old_lock,
                                    struct mdt_lock_handle *lh,
-                                   enum mdt_it_code opcode)
+                                   __u64 flags)
 {
         struct ptlrpc_request  *req = mdt_info_req(info);
-        struct obd_export      *exp = req->rq_export;
-        struct lustre_handle    remote_hdl;
         struct ldlm_request    *dlmreq;
-        struct ldlm_lock       *lock;
 
         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
                 return;
 
         dlmreq = req_capsule_client_get(info->mti_pill, &RMF_DLM_REQ);
-        remote_hdl = dlmreq->lock_handle[0];
-       /* If the client does not require open lock, it does not need to
-        * search lock in exp_lock_hash, since the server thread will
-        * make sure the lock will be released, and the resend request
-        * can always re-enqueue the lock */
-       if ((opcode != MDT_IT_OPEN) || (opcode == MDT_IT_OPEN &&
-           info->mti_spec.sp_cr_flags & MDS_OPEN_LOCK)) {
-               /* In the function below, .hs_keycmp resolves to
-                * ldlm_export_lock_keycmp() */
-               /* coverity[overrun-buffer-val] */
-               lock = cfs_hash_lookup(exp->exp_lock_hash, &remote_hdl);
-               if (lock) {
-                       lock_res_and_lock(lock);
-                       if (lock != new_lock) {
-                               lh->mlh_reg_lh.cookie = lock->l_handle.h_cookie;
-                               lh->mlh_reg_mode = lock->l_granted_mode;
-
-                               LDLM_DEBUG(lock, "Restoring lock cookie");
-                               DEBUG_REQ(D_DLMTRACE, req,
-                                         "restoring lock cookie "LPX64,
-                                         lh->mlh_reg_lh.cookie);
-                               if (old_lock)
-                                       *old_lock = LDLM_LOCK_GET(lock);
-                               cfs_hash_put(exp->exp_lock_hash,
-                                            &lock->l_exp_hash);
-                               unlock_res_and_lock(lock);
-                               return;
-                       }
-                       cfs_hash_put(exp->exp_lock_hash, &lock->l_exp_hash);
-                       unlock_res_and_lock(lock);
-               }
+
+       /* Check if this is a resend case (MSG_RESENT is set on RPC) and a
+        * lock was found by ldlm_handle_enqueue(); if so @lh must be
+        * initialized. */
+       if (flags & LDLM_FL_RESENT) {
+               lh->mlh_reg_lh.cookie = new_lock->l_handle.h_cookie;
+               lh->mlh_reg_mode = new_lock->l_granted_mode;
+
+               LDLM_DEBUG(new_lock, "Restoring lock cookie");
+               DEBUG_REQ(D_DLMTRACE, req, "restoring lock cookie "LPX64,
+                         lh->mlh_reg_lh.cookie);
+               return;
        }
+
         /*
          * If the xid matches, then we know this is a resent request, and allow
          * it. (It's probably an OPEN, for which we don't send a lock.
@@ -3145,8 +3119,8 @@ static void mdt_intent_fixup_resent(struct mdt_thread_info *info,
          */
         lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
 
-        DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
-                  remote_hdl.cookie);
+       DEBUG_REQ(D_DLMTRACE, req, "no existing lock with rhandle "LPX64,
+                 dlmreq->lock_handle[0].cookie);
 }
 
 static int mdt_intent_getxattr(enum mdt_it_code opcode,
@@ -3163,7 +3137,7 @@ static int mdt_intent_getxattr(enum mdt_it_code opcode,
         * (for the resend case) or a new lock. Below we will use it to
         * replace the original lock.
         */
-       mdt_intent_fixup_resent(info, *lockp, NULL, lhc, opcode);
+       mdt_intent_fixup_resent(info, *lockp, lhc, flags);
        if (!lustre_handle_is_used(&lhc->mlh_reg_lh)) {
                mdt_lock_reg_init(lhc, (*lockp)->l_req_mode);
                rc = mdt_object_lock(info, info->mti_object, lhc,
@@ -3175,7 +3149,7 @@ static int mdt_intent_getxattr(enum mdt_it_code opcode,
 
        grc = mdt_getxattr(info);
 
-       rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
+       rc = mdt_intent_lock_replace(info, lockp, lhc, flags);
 
        if (mdt_info_req(info)->rq_repmsg != NULL)
                ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
@@ -3193,7 +3167,6 @@ static int mdt_intent_getattr(enum mdt_it_code opcode,
                              __u64 flags)
 {
         struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_RMT];
-        struct ldlm_lock       *new_lock = NULL;
         __u64                   child_bits;
         struct ldlm_reply      *ldlm_rep;
         struct mdt_body        *reqbody;
@@ -3207,9 +3180,9 @@ static int mdt_intent_getattr(enum mdt_it_code opcode,
         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
         LASSERT(repbody);
 
-        info->mti_cross_ref = !!(reqbody->valid & OBD_MD_FLCROSSREF);
-        repbody->eadatasize = 0;
-        repbody->aclsize = 0;
+       info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
+       repbody->mbo_eadatasize = 0;
+       repbody->mbo_aclsize = 0;
 
         switch (opcode) {
         case MDT_IT_LOOKUP:
@@ -3232,7 +3205,7 @@ static int mdt_intent_getattr(enum mdt_it_code opcode,
         mdt_set_disposition(info, ldlm_rep, DISP_IT_EXECD);
 
        /* Get lock from request for possible resent case. */
-       mdt_intent_fixup_resent(info, *lockp, &new_lock, lhc, opcode);
+       mdt_intent_fixup_resent(info, *lockp, lhc, flags);
 
        rc = mdt_getattr_name_lock(info, lhc, child_bits, ldlm_rep);
        ldlm_rep->lock_policy_res2 = clear_serious(rc);
@@ -3245,7 +3218,7 @@ static int mdt_intent_getattr(enum mdt_it_code opcode,
                 GOTO(out_ucred, rc = ELDLM_LOCK_ABORTED);
         }
 
-        rc = mdt_intent_lock_replace(info, lockp, new_lock, lhc, flags);
+       rc = mdt_intent_lock_replace(info, lockp, lhc, flags);
         EXIT;
 out_ucred:
         mdt_exit_ucred(info);
@@ -3262,6 +3235,7 @@ static int mdt_intent_layout(enum mdt_it_code opcode,
                             struct ldlm_lock **lockp,
                             __u64 flags)
 {
+       struct mdt_lock_handle *lhc = &info->mti_lh[MDT_LH_LAYOUT];
        struct layout_intent *layout;
        struct lu_fid *fid;
        struct mdt_object *obj = NULL;
@@ -3277,6 +3251,9 @@ static int mdt_intent_layout(enum mdt_it_code opcode,
        fid = &info->mti_tmp_fid2;
        fid_extract_from_res_name(fid, &(*lockp)->l_resource->lr_name);
 
+       /* Get lock from request for possible resent case. */
+       mdt_intent_fixup_resent(info, *lockp, lhc, flags);
+
        obj = mdt_object_find(info->mti_env, info->mti_mdt, fid);
        if (IS_ERR(obj))
                RETURN(PTR_ERR(obj));
@@ -3284,8 +3261,10 @@ static int mdt_intent_layout(enum mdt_it_code opcode,
        if (mdt_object_exists(obj) && !mdt_object_remote(obj)) {
                /* get the length of lsm */
                rc = mdt_attr_get_eabuf_size(info, obj);
-               if (rc < 0)
+               if (rc < 0) {
+                       mdt_object_put(info->mti_env, obj);
                        RETURN(rc);
+               }
 
                if (rc > info->mti_mdt->mdt_max_mdsize)
                        info->mti_mdt->mdt_max_mdsize = rc;
@@ -3299,11 +3278,14 @@ static int mdt_intent_layout(enum mdt_it_code opcode,
        if (rc != 0)
                RETURN(-EINVAL);
 
+       if (lustre_handle_is_used(&lhc->mlh_reg_lh))
+               rc = mdt_intent_lock_replace(info, lockp, lhc, flags);
+
        layout = req_capsule_client_get(info->mti_pill, &RMF_LAYOUT_INTENT);
        LASSERT(layout != NULL);
        if (layout->li_opc == LAYOUT_INTENT_ACCESS)
-               /* return to normal ldlm handling */
-               RETURN(0);
+               /* return to normal/resent ldlm handling */
+               RETURN(rc);
 
        CERROR("%s: Unsupported layout intent (%d)\n",
                mdt_obd_name(info->mti_mdt), layout->li_opc);
@@ -3338,7 +3320,7 @@ static int mdt_intent_reint(enum mdt_it_code opcode,
         }
 
        /* Get lock from request for possible resent case. */
-       mdt_intent_fixup_resent(info, *lockp, NULL, lhc, opcode);
+       mdt_intent_fixup_resent(info, *lockp, lhc, flags);
 
         rc = mdt_reint_internal(info, lhc, opc);
 
@@ -3357,7 +3339,7 @@ static int mdt_intent_reint(enum mdt_it_code opcode,
        if (rc == -EREMOTE || mdt_get_disposition(rep, DISP_OPEN_LOCK)) {
                LASSERT(lustre_handle_is_used(&lhc->mlh_reg_lh));
                rep->lock_policy_res2 = 0;
-               rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
+               rc = mdt_intent_lock_replace(info, lockp, lhc, flags);
                RETURN(rc);
        }
 
@@ -3390,7 +3372,7 @@ static int mdt_intent_reint(enum mdt_it_code opcode,
                         LASSERTF(rc == 0, "Error occurred but lock handle "
                                  "is still in use, rc = %d\n", rc);
                         rep->lock_policy_res2 = 0;
-                        rc = mdt_intent_lock_replace(info, lockp, NULL, lhc, flags);
+                       rc = mdt_intent_lock_replace(info, lockp, lhc, flags);
                         RETURN(rc);
                 } else {
                         lhc->mlh_reg_lh.cookie = 0ull;
@@ -4241,7 +4223,6 @@ TGT_MDT_HDL(HABEO_CORPUS,         MDS_DONE_WRITING,
                                                        mdt_done_writing),
 TGT_MDT_HDL(HABEO_CORPUS| HABEO_REFERO,        MDS_READPAGE,   mdt_readpage),
 TGT_MDT_HDL(HABEO_CORPUS| HABEO_REFERO,        MDS_SYNC,       mdt_sync),
-TGT_MDT_HDL(HABEO_CORPUS| HABEO_REFERO,        MDS_IS_SUBDIR,  mdt_is_subdir),
 TGT_MDT_HDL(0,                         MDS_QUOTACTL,   mdt_quotactl),
 TGT_MDT_HDL(HABEO_CORPUS| HABEO_REFERO | MUTABOR, MDS_HSM_PROGRESS,
                                                        mdt_hsm_progress),
@@ -4369,12 +4350,7 @@ static void mdt_fini(const struct lu_env *env, struct mdt_device *m)
 
        mdt_quota_fini(env, m);
 
-        cfs_free_nidlist(&m->mdt_nosquash_nids);
-        if (m->mdt_nosquash_str) {
-                OBD_FREE(m->mdt_nosquash_str, m->mdt_nosquash_strlen);
-                m->mdt_nosquash_str = NULL;
-                m->mdt_nosquash_strlen = 0;
-        }
+       cfs_free_nidlist(&m->mdt_squash.rsi_nosquash_nids);
 
         mdt_seq_fini(env, m);
         mdt_fld_fini(env, m);
@@ -4460,12 +4436,10 @@ static int mdt_init0(const struct lu_env *env, struct mdt_device *m,
         m->mdt_capa_timeout = CAPA_TIMEOUT;
         m->mdt_capa_alg = CAPA_HMAC_ALG_SHA1;
         m->mdt_ck_timeout = CAPA_KEY_TIMEOUT;
-        m->mdt_squash_uid = 0;
-        m->mdt_squash_gid = 0;
-        CFS_INIT_LIST_HEAD(&m->mdt_nosquash_nids);
-        m->mdt_nosquash_str = NULL;
-        m->mdt_nosquash_strlen = 0;
-       init_rwsem(&m->mdt_squash_sem);
+       m->mdt_squash.rsi_uid = 0;
+       m->mdt_squash.rsi_gid = 0;
+       INIT_LIST_HEAD(&m->mdt_squash.rsi_nosquash_nids);
+       init_rwsem(&m->mdt_squash.rsi_sem);
        spin_lock_init(&m->mdt_osfs_lock);
        m->mdt_osfs_age = cfs_time_shift_64(-1000);
        m->mdt_enable_remote_dir = 0;
@@ -4674,7 +4648,6 @@ static int mdt_process_config(const struct lu_env *env,
 
        switch (cfg->lcfg_command) {
        case LCFG_PARAM: {
-               struct lprocfs_static_vars  lvars;
                struct obd_device          *obd = d->ld_obd;
 
                /* For interoperability */
@@ -4709,14 +4682,13 @@ static int mdt_process_config(const struct lu_env *env,
                        }
                }
 
-               lprocfs_mdt_init_vars(&lvars);
-               rc = class_process_proc_param(PARAM_MDT, lvars.obd_vars,
-                                             cfg, obd);
+               rc = class_process_proc_seq_param(PARAM_MDT, obd->obd_vars,
+                                                       cfg, obd);
                if (rc > 0 || rc == -ENOSYS) {
                        /* is it an HSM var ? */
-                       rc = class_process_proc_param(PARAM_HSM,
-                                                     hsm_cdt_get_proc_vars(),
-                                                     cfg, obd);
+                       rc = class_process_proc_seq_param(PARAM_HSM,
+                                                       hsm_cdt_get_proc_vars(),
+                                                       cfg, obd);
                        if (rc > 0 || rc == -ENOSYS)
                                /* we don't understand; pass it on */
                                rc = next->ld_ops->ldo_process_config(env, next,
@@ -5348,28 +5320,32 @@ static int mdt_path_current(struct mdt_thread_info *info,
        --ptr;
        pli->pli_fidcount = 0;
        pli->pli_fids[0] = *(struct lu_fid *)mdt_object_fid(pli->pli_mdt_obj);
-
+       *tmpfid = pli->pli_fids[0];
        /* root FID only exists on MDT0, and fid2path should also ends at MDT0,
         * so checking root_fid can only happen on MDT0. */
        while (!lu_fid_eq(&mdt->mdt_md_root_fid,
                          &pli->pli_fids[pli->pli_fidcount])) {
-               mdt_obj = mdt_object_find(info->mti_env, mdt,
-                                         &pli->pli_fids[pli->pli_fidcount]);
+               struct lu_buf           lmv_buf;
+
+               mdt_obj = mdt_object_find(info->mti_env, mdt, tmpfid);
                if (IS_ERR(mdt_obj))
                        GOTO(out, rc = PTR_ERR(mdt_obj));
-               if (mdt_object_remote(mdt_obj)) {
-                       mdt_object_put(info->mti_env, mdt_obj);
-                       GOTO(remote_out, rc = -EREMOTE);
-               }
+
                if (!mdt_object_exists(mdt_obj)) {
                        mdt_object_put(info->mti_env, mdt_obj);
                        GOTO(out, rc = -ENOENT);
                }
 
+               if (mdt_object_remote(mdt_obj)) {
+                       mdt_object_put(info->mti_env, mdt_obj);
+                       GOTO(remote_out, rc = -EREMOTE);
+               }
+
                rc = mdt_links_read(info, mdt_obj, &ldata);
-               mdt_object_put(info->mti_env, mdt_obj);
-               if (rc != 0)
+               if (rc != 0) {
+                       mdt_object_put(info->mti_env, mdt_obj);
                        GOTO(out, rc);
+               }
 
                leh = buf->lb_buf;
                lee = (struct link_ea_entry *)(leh + 1); /* link #0 */
@@ -5390,6 +5366,26 @@ static int mdt_path_current(struct mdt_thread_info *info,
                                pli->pli_linkno++;
                }
 
+               lmv_buf.lb_buf = info->mti_xattr_buf;
+               lmv_buf.lb_len = sizeof(info->mti_xattr_buf);
+               /* Check if it is slave stripes */
+               rc = mo_xattr_get(info->mti_env, mdt_object_child(mdt_obj),
+                                 &lmv_buf, XATTR_NAME_LMV);
+               mdt_object_put(info->mti_env, mdt_obj);
+               if (rc > 0) {
+                       union lmv_mds_md *lmm = lmv_buf.lb_buf;
+
+                       /* For slave stripes, get its master */
+                       if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE) {
+                               pli->pli_fids[pli->pli_fidcount] = *tmpfid;
+                               continue;
+                       }
+               } else if (rc < 0 && rc != -ENODATA) {
+                       GOTO(out, rc);
+               }
+
+               rc = 0;
+
                /* Pack the name in the end of the buffer */
                ptr -= tmpname->ln_namelen;
                if (ptr - 1 <= pli->pli_path)
@@ -5913,7 +5909,6 @@ static struct lu_device_type mdt_device_type = {
 
 static int __init mdt_mod_init(void)
 {
-       struct lprocfs_static_vars lvars;
        int rc;
 
        CLASSERT(sizeof("0x0123456789ABCDEF:0x01234567:0x01234567") ==
@@ -5928,10 +5923,9 @@ static int __init mdt_mod_init(void)
        if (rc)
                GOTO(lu_fini, rc);
 
-       lprocfs_mdt_init_vars(&lvars);
        rc = class_register_type(&mdt_obd_device_ops, NULL, true, NULL,
 #ifndef HAVE_ONLY_PROCFS_SEQ
-                                lvars.module_vars,
+                                NULL,
 #endif
                                 LUSTRE_MDT_NAME, &mdt_device_type);
        if (rc)