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LU-1866 misc: fix some issues found during LFSCK
[fs/lustre-release.git] / lustre / mdt / mdt_lib.c
index 36c235e..051421b 100644 (file)
@@ -1,6 +1,4 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
  * GPL HEADER START
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
  * Author: Fan Yong <fanyong@clusterfs.com>
  */
 
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
 #define DEBUG_SUBSYSTEM S_MDS
 
 #include "mdt_internal.h"
+#include <lnet/lib-lnet.h>
 
 
 typedef enum ucred_init_type {
@@ -63,41 +60,80 @@ typedef enum ucred_init_type {
 
 void mdt_exit_ucred(struct mdt_thread_info *info)
 {
-        struct md_ucred   *uc  = mdt_ucred(info);
-        struct mdt_device *mdt = info->mti_mdt;
-
-        if (uc->mu_valid != UCRED_INIT) {
-                uc->mu_suppgids[0] = uc->mu_suppgids[1] = -1;
-                if (uc->mu_ginfo) {
-                        groups_free(uc->mu_ginfo);
-                        uc->mu_ginfo = NULL;
-                }
-                if (uc->mu_identity) {
-                        mdt_identity_put(mdt->mdt_identity_cache,
-                                         uc->mu_identity);
-                        uc->mu_identity = NULL;
-                }
-                uc->mu_valid = UCRED_INIT;
-        }
+       struct lu_ucred   *uc  = mdt_ucred(info);
+       struct mdt_device *mdt = info->mti_mdt;
+
+       LASSERT(uc != NULL);
+       if (uc->uc_valid != UCRED_INIT) {
+               uc->uc_suppgids[0] = uc->uc_suppgids[1] = -1;
+               if (uc->uc_ginfo) {
+                       cfs_put_group_info(uc->uc_ginfo);
+                       uc->uc_ginfo = NULL;
+               }
+               if (uc->uc_identity) {
+                       mdt_identity_put(mdt->mdt_identity_cache,
+                                        uc->uc_identity);
+                       uc->uc_identity = NULL;
+               }
+               uc->uc_valid = UCRED_INIT;
+       }
 }
 
-/* XXX: root_squash will be redesigned in Lustre 1.7.
- * Do not root_squash for inter-MDS operations */
-static int mdt_root_squash(struct mdt_thread_info *info)
+static int match_nosquash_list(struct rw_semaphore *sem,
+                              cfs_list_t *nidlist,
+                              lnet_nid_t peernid)
 {
-        return 0;
+       int rc;
+       ENTRY;
+       down_read(sem);
+       rc = cfs_match_nid(peernid, nidlist);
+       up_read(sem);
+       RETURN(rc);
+}
+
+/* root_squash for inter-MDS operations */
+static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
+{
+       struct lu_ucred *ucred = mdt_ucred(info);
+       ENTRY;
+
+       LASSERT(ucred != NULL);
+       if (!info->mti_mdt->mdt_squash_uid || ucred->uc_fsuid)
+               RETURN(0);
+
+        if (match_nosquash_list(&info->mti_mdt->mdt_squash_sem,
+                                &info->mti_mdt->mdt_nosquash_nids,
+                                peernid)) {
+                CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
+                       libcfs_nid2str(peernid));
+                RETURN(0);
+        }
+
+       CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
+              libcfs_nid2str(peernid),
+              ucred->uc_fsuid, ucred->uc_fsgid, ucred->uc_cap,
+              info->mti_mdt->mdt_squash_uid, info->mti_mdt->mdt_squash_gid,
+              0);
+
+       ucred->uc_fsuid = info->mti_mdt->mdt_squash_uid;
+       ucred->uc_fsgid = info->mti_mdt->mdt_squash_gid;
+       ucred->uc_cap = 0;
+       ucred->uc_suppgids[0] = -1;
+       ucred->uc_suppgids[1] = -1;
+
+       RETURN(0);
 }
 
 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
                           void *buf)
 {
         struct ptlrpc_request   *req = mdt_info_req(info);
-        struct mdt_export_data  *med = mdt_req2med(req);
         struct mdt_device       *mdt = info->mti_mdt;
         struct ptlrpc_user_desc *pud = req->rq_user_desc;
-        struct md_ucred         *ucred = mdt_ucred(info);
+       struct lu_ucred         *ucred = mdt_ucred(info);
         lnet_nid_t               peernid = req->rq_peer.nid;
         __u32                    perm = 0;
+        __u32                    remote = exp_connect_rmtclient(info->mti_exp);
         int                      setuid;
         int                      setgid;
         int                      rc = 0;
@@ -107,23 +143,24 @@ static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
         LASSERT(req->rq_auth_gss);
         LASSERT(!req->rq_auth_usr_mdt);
         LASSERT(req->rq_user_desc);
-        
-        ucred->mu_valid = UCRED_INVALID;
+       LASSERT(ucred != NULL);
 
-        ucred->mu_o_uid   = pud->pud_uid;
-        ucred->mu_o_gid   = pud->pud_gid;
-        ucred->mu_o_fsuid = pud->pud_fsuid;
-        ucred->mu_o_fsgid = pud->pud_fsgid;
+       ucred->uc_valid = UCRED_INVALID;
 
-        if (type == BODY_INIT) {
-                struct mdt_body *body = (struct mdt_body *)buf;
+       ucred->uc_o_uid   = pud->pud_uid;
+       ucred->uc_o_gid   = pud->pud_gid;
+       ucred->uc_o_fsuid = pud->pud_fsuid;
+       ucred->uc_o_fsgid = pud->pud_fsgid;
 
-                ucred->mu_suppgids[0] = body->suppgid;
-                ucred->mu_suppgids[1] = -1;
-        }
+       if (type == BODY_INIT) {
+               struct mdt_body *body = (struct mdt_body *)buf;
+
+               ucred->uc_suppgids[0] = body->suppgid;
+               ucred->uc_suppgids[1] = -1;
+       }
 
         /* sanity check: we expect the uid which client claimed is true */
-        if (med->med_rmtclient) {
+        if (remote) {
                 if (req->rq_auth_mapped_uid == INVALID_UID) {
                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
                         RETURN(-EACCES);
@@ -153,12 +190,12 @@ static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
         }
 
         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
-                if (med->med_rmtclient) {
+                if (remote) {
                         CDEBUG(D_SEC, "remote client must run with identity_get "
                                "enabled!\n");
                         RETURN(-EACCES);
                 } else {
-                        ucred->mu_identity = NULL;
+                       ucred->uc_identity = NULL;
                         perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
                                CFS_SETGRP_PERM;
                 }
@@ -169,8 +206,8 @@ static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
                                             pud->pud_uid);
                 if (IS_ERR(identity)) {
                         if (unlikely(PTR_ERR(identity) == -EREMCHG &&
-                                     !med->med_rmtclient)) {
-                                ucred->mu_identity = NULL;
+                                     !remote)) {
+                               ucred->uc_identity = NULL;
                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
                                        CFS_SETGRP_PERM;
                         } else {
@@ -179,18 +216,17 @@ static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
                                 RETURN(-EACCES);
                         }
                 } else {
-                        ucred->mu_identity = identity;
-                        perm = mdt_identity_get_perm(ucred->mu_identity,
-                                                     med->med_rmtclient,
-                                                     peernid);
+                       ucred->uc_identity = identity;
+                       perm = mdt_identity_get_perm(ucred->uc_identity,
+                                                    remote, peernid);
                 }
         }
 
         /* find out the setuid/setgid attempt */
         setuid = (pud->pud_uid != pud->pud_fsuid);
-        setgid = ((pud->pud_gid != pud->pud_fsgid) ||
-                  (ucred->mu_identity &&
-                  (pud->pud_gid != ucred->mu_identity->mi_gid)));
+       setgid = ((pud->pud_gid != pud->pud_fsgid) ||
+                 (ucred->uc_identity &&
+                  (pud->pud_gid != ucred->uc_identity->mi_gid)));
 
         /* check permission of setuid */
         if (setuid && !(perm & CFS_SETUID_PERM)) {
@@ -201,96 +237,100 @@ static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 
         /* check permission of setgid */
         if (setgid && !(perm & CFS_SETGID_PERM)) {
-                CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
-                       "from %s\n", pud->pud_uid, pud->pud_gid,
-                       pud->pud_fsuid, pud->pud_fsgid,
-                       ucred->mu_identity->mi_gid, libcfs_nid2str(peernid));
-                GOTO(out, rc = -EACCES);
+               CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
+                      "from %s\n", pud->pud_uid, pud->pud_gid,
+                      pud->pud_fsuid, pud->pud_fsgid,
+                      ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
+               GOTO(out, rc = -EACCES);
         }
 
         /*
          * NB: remote client not allowed to setgroups anyway.
          */
-        if (!med->med_rmtclient && perm & CFS_SETGRP_PERM) {
-                if (pud->pud_ngroups) {
-                        /* setgroups for local client */
-                        ucred->mu_ginfo = groups_alloc(pud->pud_ngroups);
-                        if (!ucred->mu_ginfo) {
-                                CERROR("failed to alloc %d groups\n",
-                                       pud->pud_ngroups);
-                                GOTO(out, rc = -ENOMEM);
-                        }
-
-                        lustre_groups_from_list(ucred->mu_ginfo,
-                                                pud->pud_groups);
-                        lustre_groups_sort(ucred->mu_ginfo);
-                } else {
-                        ucred->mu_ginfo = NULL;
-                }
-        } else {
-                ucred->mu_suppgids[0] = -1;
-                ucred->mu_suppgids[1] = -1;
-                ucred->mu_ginfo = NULL;
-        }
-
-        ucred->mu_uid   = pud->pud_uid;
-        ucred->mu_gid   = pud->pud_gid;
-        ucred->mu_fsuid = pud->pud_fsuid;
-        ucred->mu_fsgid = pud->pud_fsgid;
-
-        /* XXX: need to process root_squash here. */
-        mdt_root_squash(info);
-
-        /* remove fs privilege for non-root user */
-        if (ucred->mu_fsuid)
-                ucred->mu_cap = pud->pud_cap & ~CAP_FS_MASK;
-        else
-                ucred->mu_cap = pud->pud_cap;
-        ucred->mu_valid = UCRED_NEW;
-
-        EXIT;
+       if (!remote && perm & CFS_SETGRP_PERM) {
+               if (pud->pud_ngroups) {
+                       /* setgroups for local client */
+                       ucred->uc_ginfo = cfs_groups_alloc(pud->pud_ngroups);
+                       if (!ucred->uc_ginfo) {
+                               CERROR("failed to alloc %d groups\n",
+                                      pud->pud_ngroups);
+                               GOTO(out, rc = -ENOMEM);
+                       }
+
+                       lustre_groups_from_list(ucred->uc_ginfo,
+                                               pud->pud_groups);
+                       lustre_groups_sort(ucred->uc_ginfo);
+               } else {
+                       ucred->uc_ginfo = NULL;
+               }
+       } else {
+               ucred->uc_suppgids[0] = -1;
+               ucred->uc_suppgids[1] = -1;
+               ucred->uc_ginfo = NULL;
+       }
+
+       ucred->uc_uid   = pud->pud_uid;
+       ucred->uc_gid   = pud->pud_gid;
+       ucred->uc_fsuid = pud->pud_fsuid;
+       ucred->uc_fsgid = pud->pud_fsgid;
+
+       /* process root_squash here. */
+       mdt_root_squash(info, peernid);
+
+       /* remove fs privilege for non-root user. */
+       if (ucred->uc_fsuid)
+               ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
+       else
+               ucred->uc_cap = pud->pud_cap;
+       if (remote && !(perm & CFS_RMTOWN_PERM))
+               ucred->uc_cap &= ~(CFS_CAP_SYS_RESOURCE_MASK |
+                                  CFS_CAP_CHOWN_MASK);
+       ucred->uc_valid = UCRED_NEW;
+
+       EXIT;
 
 out:
-        if (rc) {
-                if (ucred->mu_ginfo) {
-                        groups_free(ucred->mu_ginfo);
-                        ucred->mu_ginfo = NULL;
-                }
-                if (ucred->mu_identity) {
-                        mdt_identity_put(mdt->mdt_identity_cache,
-                                         ucred->mu_identity);
-                        ucred->mu_identity = NULL;
-                }
-        }
-
-        return rc;
+       if (rc) {
+               if (ucred->uc_ginfo) {
+                       cfs_put_group_info(ucred->uc_ginfo);
+                       ucred->uc_ginfo = NULL;
+               }
+               if (ucred->uc_identity) {
+                       mdt_identity_put(mdt->mdt_identity_cache,
+                                        ucred->uc_identity);
+                       ucred->uc_identity = NULL;
+               }
+       }
+
+       return rc;
 }
 
 int mdt_check_ucred(struct mdt_thread_info *info)
 {
         struct ptlrpc_request   *req = mdt_info_req(info);
-        struct mdt_export_data  *med = mdt_req2med(req);
         struct mdt_device       *mdt = info->mti_mdt;
         struct ptlrpc_user_desc *pud = req->rq_user_desc;
-        struct md_ucred         *ucred = mdt_ucred(info);
+       struct lu_ucred         *ucred = mdt_ucred(info);
         struct md_identity      *identity = NULL;
         lnet_nid_t               peernid = req->rq_peer.nid;
         __u32                    perm = 0;
+        __u32                    remote = exp_connect_rmtclient(info->mti_exp);
         int                      setuid;
         int                      setgid;
         int                      rc = 0;
 
         ENTRY;
 
-        if ((ucred->mu_valid == UCRED_OLD) || (ucred->mu_valid == UCRED_NEW))
-                RETURN(0);
+       LASSERT(ucred != NULL);
+       if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
+               RETURN(0);
 
         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
                 RETURN(0);
 
         /* sanity check: if we use strong authentication, we expect the
          * uid which client claimed is true */
-        if (med->med_rmtclient) {
+        if (remote) {
                 if (req->rq_auth_mapped_uid == INVALID_UID) {
                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
                         RETURN(-EACCES);
@@ -320,7 +360,7 @@ int mdt_check_ucred(struct mdt_thread_info *info)
         }
 
         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
-                if (med->med_rmtclient) {
+                if (remote) {
                         CDEBUG(D_SEC, "remote client must run with identity_get "
                                "enabled!\n");
                         RETURN(-EACCES);
@@ -331,7 +371,7 @@ int mdt_check_ucred(struct mdt_thread_info *info)
         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
         if (IS_ERR(identity)) {
                 if (unlikely(PTR_ERR(identity) == -EREMCHG &&
-                             !med->med_rmtclient)) {
+                             !remote)) {
                         RETURN(0);
                 } else {
                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
@@ -340,7 +380,7 @@ int mdt_check_ucred(struct mdt_thread_info *info)
                }
         }
 
-        perm = mdt_identity_get_perm(identity, med->med_rmtclient, peernid);
+        perm = mdt_identity_get_perm(identity, remote, peernid);
         /* find out the setuid/setgid attempt */
         setuid = (pud->pud_uid != pud->pud_fsuid);
         setgid = (pud->pud_gid != pud->pud_fsgid ||
@@ -370,95 +410,98 @@ out:
 }
 
 static int old_init_ucred(struct mdt_thread_info *info,
-                          struct mdt_body *body)
+                         struct mdt_body *body)
 {
-        struct md_ucred *uc = mdt_ucred(info);
-        struct mdt_device  *mdt = info->mti_mdt;
-        struct md_identity *identity = NULL;
-
-        ENTRY;
-
-        uc->mu_valid = UCRED_INVALID;
-        uc->mu_o_uid = uc->mu_uid = body->uid;
-        uc->mu_o_gid = uc->mu_gid = body->gid;
-        uc->mu_o_fsuid = uc->mu_fsuid = body->fsuid;
-        uc->mu_o_fsgid = uc->mu_fsgid = body->fsgid;
-        uc->mu_suppgids[0] = body->suppgid;
-        uc->mu_suppgids[1] = -1;
-        uc->mu_ginfo = NULL;
-        if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
-                identity = mdt_identity_get(mdt->mdt_identity_cache,
-                                            uc->mu_fsuid);
-                if (IS_ERR(identity)) {
-                        if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
-                                identity = NULL;
-                        } else {
-                                CDEBUG(D_SEC, "Deny access without identity: "
-                                       "uid %u\n", uc->mu_fsuid);
-                                RETURN(-EACCES);
-                        }
-                }
-        }
-        uc->mu_identity = identity;
-
-        /* XXX: need to process root_squash here. */
-        mdt_root_squash(info);
-
-        /* remove fs privilege for non-root user */
-        if (uc->mu_fsuid)
-                uc->mu_cap = body->capability & ~CAP_FS_MASK;
-        else
-                uc->mu_cap = body->capability;
-        uc->mu_valid = UCRED_OLD;
-
-        RETURN(0);
+       struct lu_ucred *uc = mdt_ucred(info);
+       struct mdt_device  *mdt = info->mti_mdt;
+       struct md_identity *identity = NULL;
+
+       ENTRY;
+
+       LASSERT(uc != NULL);
+       uc->uc_valid = UCRED_INVALID;
+       uc->uc_o_uid = uc->uc_uid = body->uid;
+       uc->uc_o_gid = uc->uc_gid = body->gid;
+       uc->uc_o_fsuid = uc->uc_fsuid = body->fsuid;
+       uc->uc_o_fsgid = uc->uc_fsgid = body->fsgid;
+       uc->uc_suppgids[0] = body->suppgid;
+       uc->uc_suppgids[1] = -1;
+       uc->uc_ginfo = NULL;
+       if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
+               identity = mdt_identity_get(mdt->mdt_identity_cache,
+                                           uc->uc_fsuid);
+               if (IS_ERR(identity)) {
+                       if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
+                               identity = NULL;
+                       } else {
+                               CDEBUG(D_SEC, "Deny access without identity: "
+                                      "uid %u\n", uc->uc_fsuid);
+                               RETURN(-EACCES);
+                       }
+               }
+       }
+       uc->uc_identity = identity;
+
+       /* process root_squash here. */
+       mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
+
+       /* remove fs privilege for non-root user. */
+       if (uc->uc_fsuid)
+               uc->uc_cap = body->capability & ~CFS_CAP_FS_MASK;
+       else
+               uc->uc_cap = body->capability;
+       uc->uc_valid = UCRED_OLD;
+
+       RETURN(0);
 }
 
 static int old_init_ucred_reint(struct mdt_thread_info *info)
 {
-        struct md_ucred *uc = mdt_ucred(info);
-        struct mdt_device  *mdt = info->mti_mdt;
-        struct md_identity *identity = NULL;
-
-        ENTRY;
-
-        uc->mu_valid = UCRED_INVALID;
-        uc->mu_o_uid = uc->mu_o_fsuid = uc->mu_uid = uc->mu_fsuid;
-        uc->mu_o_gid = uc->mu_o_fsgid = uc->mu_gid = uc->mu_fsgid;
-        uc->mu_ginfo = NULL;
-        if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
-                identity = mdt_identity_get(mdt->mdt_identity_cache,
-                                            uc->mu_fsuid);
-                if (IS_ERR(identity)) {
-                        if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
-                                identity = NULL;
-                        } else {
-                                CDEBUG(D_SEC, "Deny access without identity: "
-                                       "uid %u\n", uc->mu_fsuid);
-                                RETURN(-EACCES);
-                        }
-                }
-        }
-        uc->mu_identity = identity;
-
-        /* XXX: need to process root_squash here. */
-        mdt_root_squash(info);
-
-        /* remove fs privilege for non-root user */
-        if (uc->mu_fsuid)
-                uc->mu_cap &= ~CAP_FS_MASK;
-        uc->mu_valid = UCRED_OLD;
-
-        RETURN(0);
+       struct lu_ucred *uc = mdt_ucred(info);
+       struct mdt_device  *mdt = info->mti_mdt;
+       struct md_identity *identity = NULL;
+
+       ENTRY;
+
+       LASSERT(uc != NULL);
+       uc->uc_valid = UCRED_INVALID;
+       uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
+       uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
+       uc->uc_ginfo = NULL;
+       if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
+               identity = mdt_identity_get(mdt->mdt_identity_cache,
+                                           uc->uc_fsuid);
+               if (IS_ERR(identity)) {
+                       if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
+                               identity = NULL;
+                       } else {
+                               CDEBUG(D_SEC, "Deny access without identity: "
+                                      "uid %u\n", uc->uc_fsuid);
+                               RETURN(-EACCES);
+                       }
+               }
+       }
+       uc->uc_identity = identity;
+
+       /* process root_squash here. */
+       mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
+
+       /* remove fs privilege for non-root user. */
+       if (uc->uc_fsuid)
+               uc->uc_cap &= ~CFS_CAP_FS_MASK;
+       uc->uc_valid = UCRED_OLD;
+
+       RETURN(0);
 }
 
 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 {
         struct ptlrpc_request *req = mdt_info_req(info);
-        struct md_ucred       *uc  = mdt_ucred(info);
+       struct lu_ucred       *uc  = mdt_ucred(info);
 
-        if ((uc->mu_valid == UCRED_OLD) || (uc->mu_valid == UCRED_NEW))
-                return 0;
+       LASSERT(uc != NULL);
+       if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
+               return 0;
 
         mdt_exit_ucred(info);
 
@@ -471,10 +514,11 @@ int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 {
         struct ptlrpc_request *req = mdt_info_req(info);
-        struct md_ucred       *uc  = mdt_ucred(info);
+       struct lu_ucred       *uc  = mdt_ucred(info);
 
-        if ((uc->mu_valid == UCRED_OLD) || (uc->mu_valid == UCRED_NEW))
-                return 0;
+       LASSERT(uc != NULL);
+       if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
+               return 0;
 
         mdt_exit_ucred(info);
 
@@ -488,31 +532,34 @@ int mdt_init_ucred_reint(struct mdt_thread_info *info)
 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm)
 {
         const struct lov_ost_data_v1 *lod;
-        int i;
-        __s16 stripe_count =
-                le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
+        int                           i;
+        __u16                         count;
+
+        count = le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
 
         CDEBUG(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
                le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
                le32_to_cpu(lmm->lmm_pattern));
         CDEBUG(level,"stripe_size=0x%x, stripe_count=0x%x\n",
-               le32_to_cpu(lmm->lmm_stripe_size),
-               le32_to_cpu(lmm->lmm_stripe_count));
-        LASSERT(stripe_count <= (__s16)LOV_MAX_STRIPE_COUNT);
-        for (i = 0, lod = lmm->lmm_objects; i < stripe_count; i++, lod++) {
+               le32_to_cpu(lmm->lmm_stripe_size), count);
+        if (count == LOV_ALL_STRIPES)
+                return;
+        LASSERT(count <= LOV_MAX_STRIPE_COUNT);
+        for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++)
                 CDEBUG(level, "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
                        i, le32_to_cpu(lod->l_ost_idx),
-                       le64_to_cpu(lod->l_object_gr),
+                       le64_to_cpu(lod->l_object_seq),
                        le64_to_cpu(lod->l_object_id));
-        }
 }
 
-void mdt_shrink_reply(struct mdt_thread_info *info)
+/* Shrink and/or grow reply buffers */
+int mdt_fix_reply(struct mdt_thread_info *info)
 {
         struct req_capsule *pill = info->mti_pill;
         struct mdt_body    *body;
-        int                md_size;
+        int                md_size, md_packed = 0;
         int                acl_size;
+        int                rc = 0;
         ENTRY;
 
         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
@@ -525,11 +572,17 @@ void mdt_shrink_reply(struct mdt_thread_info *info)
 
         acl_size = body->aclsize;
 
-        CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d" 
-                        " MDSCAPA = "LPX64", OSSCAPA = "LPX64"\n",
+        /* this replay - not send info to client */
+       if (info->mti_spec.no_create) {
+               md_size = 0;
+               acl_size = 0;
+       }
+
+        CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
+                        " MDSCAPA = %llx, OSSCAPA = %llx\n",
                         md_size, acl_size,
-                        body->valid & OBD_MD_FLMDSCAPA,
-                        body->valid & OBD_MD_FLOSSCAPA);
+                        (unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
+                        (unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
 /*
             &RMF_MDT_BODY,
             &RMF_MDT_MD,
@@ -539,28 +592,74 @@ void mdt_shrink_reply(struct mdt_thread_info *info)
 (optional)  something else
 */
 
-        if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
-                req_capsule_shrink(pill, &RMF_MDT_MD, md_size,
-                                   RCL_SERVER);
+        /* MDT_MD buffer may be bigger than packed value, let's shrink all
+         * buffers before growing it */
+       if (info->mti_big_lmm_used) {
+                LASSERT(req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER));
+                md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
+                                                 RCL_SERVER);
+                LASSERT(md_packed > 0);
+                /* buffer must be allocated separately */
+                LASSERT(info->mti_attr.ma_lmm !=
+                        req_capsule_server_get(pill, &RMF_MDT_MD));
+                req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
+                /* free big lmm if md_size is not needed */
+                if (md_size == 0)
+                       info->mti_big_lmm_used = 0;
+        } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
+                req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
+        }
+
         if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
         else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
                 req_capsule_shrink(pill, &RMF_LOGCOOKIES,
-                                            acl_size, RCL_SERVER);
+                                   acl_size, RCL_SERVER);
 
         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
-                    !(body->valid & OBD_MD_FLMDSCAPA))
+            !(body->valid & OBD_MD_FLMDSCAPA))
                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 
         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
-                !(body->valid & OBD_MD_FLOSSCAPA))
+            !(body->valid & OBD_MD_FLOSSCAPA))
                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 
         /*
          * Some more field should be shrinked if needed.
          * This should be done by those who added fields to reply message.
          */
-        EXIT;
+
+        /* Grow MD buffer if needed finally */
+       if (info->mti_big_lmm_used) {
+                void *lmm;
+
+                LASSERT(md_size > md_packed);
+                CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
+                       md_size - md_packed);
+                rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
+                if (rc) {
+                        /* we can't answer with proper LOV EA, drop flags,
+                         * the rc is also returned so this request is
+                         * considered as failed */
+                        body->valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
+                        /* don't return transno along with error */
+                        lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
+                } else {
+                        /* now we need to pack right LOV EA */
+                        lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
+                        LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
+                                                     RCL_SERVER) ==
+                                info->mti_attr.ma_lmm_size);
+                        memcpy(lmm, info->mti_attr.ma_lmm,
+                               info->mti_attr.ma_lmm_size);
+                }
+                /* update mdt_max_mdsize so clients will be aware about that */
+                if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
+                        info->mti_mdt->mdt_max_mdsize =
+                                                    info->mti_attr.ma_lmm_size;
+               info->mti_big_lmm_used = 0;
+        }
+        RETURN(rc);
 }
 
 
@@ -571,6 +670,7 @@ int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 {
         struct mdt_body       *repbody;
         const struct lu_attr *la = &ma->ma_attr;
+        int rc;
         ENTRY;
 
         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
@@ -580,31 +680,31 @@ int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 
         if (ma->ma_valid & MA_LOV) {
-                __u32 mode;
-
-                if (mdt_object_exists(mo) < 0)
-                        /* If it is a remote object, and we do not retrieve
-                         * EA back unlink reg file*/
-                        mode = S_IFREG;
-                else
-                        mode = lu_object_attr(&mo->mot_obj.mo_lu);
-
-                LASSERT(ma->ma_lmm_size);
-                mdt_dump_lmm(D_INFO, ma->ma_lmm);
-                repbody->eadatasize = ma->ma_lmm_size;
-                if (S_ISREG(mode))
-                        repbody->valid |= OBD_MD_FLEASIZE;
-                else if (S_ISDIR(mode))
-                        repbody->valid |= OBD_MD_FLDIREA;
-                else
-                        LBUG();
+               CERROR("No need in LOV EA upon unlink\n");
+               dump_stack();
         }
+       repbody->eadatasize = 0;
 
         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
                 repbody->aclsize = ma->ma_cookie_size;
                 repbody->valid |= OBD_MD_FLCOOKIE;
         }
 
+        if (info->mti_mdt->mdt_opts.mo_oss_capa &&
+            info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA &&
+            repbody->valid & OBD_MD_FLEASIZE) {
+                struct lustre_capa *capa;
+
+                capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
+                LASSERT(capa);
+                capa->lc_opc = CAPA_OPC_OSS_DESTROY;
+                rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
+                if (rc)
+                        RETURN(rc);
+
+                repbody->valid |= OBD_MD_FLOSSCAPA;
+        }
+
         RETURN(0);
 }
 
@@ -666,7 +766,7 @@ static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
                 out |= LA_BLOCKS;
 
         if (in & ATTR_FROM_OPEN)
-                rr->rr_flags |= MRF_SETATTR_LOCKED;
+                rr->rr_flags |= MRF_OPEN_TRUNC;
 
         if (in & ATTR_ATIME_SET)
                 out |= LA_ATIME;
@@ -680,23 +780,33 @@ static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
         if (in & ATTR_ATTR_FLAG)
                 out |= LA_FLAGS;
 
-        if (in & MDS_OPEN_OWNEROVERRIDE)
-                ma->ma_attr_flags |= MDS_OPEN_OWNEROVERRIDE;
+        if (in & ATTR_KILL_SUID)
+                out |= LA_KILL_SUID;
+
+        if (in & ATTR_KILL_SGID)
+                out |= LA_KILL_SGID;
+
+       if (in & MDS_OPEN_OWNEROVERRIDE)
+               ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
+
+        if (in & ATTR_FORCE)
+                ma->ma_attr_flags |= MDS_PERM_BYPASS;
 
         /*XXX need ATTR_RAW?*/
         in &= ~(ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_BLOCKS|
                 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME|ATTR_FROM_OPEN|
                 ATTR_ATIME_SET|ATTR_CTIME_SET|ATTR_MTIME_SET|
-                ATTR_ATTR_FLAG|ATTR_RAW|MDS_OPEN_OWNEROVERRIDE);
+                ATTR_ATTR_FLAG|ATTR_RAW|MDS_OPEN_OWNEROVERRIDE|
+                ATTR_FORCE|ATTR_KILL_SUID|ATTR_KILL_SGID);
         if (in != 0)
-                CERROR("Unknown attr bits: %#llx\n", in);
+                CERROR("Unknown attr bits: "LPX64"\n", in);
         return out;
 }
 /* unpacking */
 
 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
 {
-        struct md_ucred         *uc  = mdt_ucred(info);
+       struct lu_ucred         *uc  = mdt_ucred(info);
         struct md_attr          *ma = &info->mti_attr;
         struct lu_attr          *la = &ma->ma_attr;
         struct req_capsule      *pill = info->mti_pill;
@@ -709,11 +819,12 @@ static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid = rec->sa_fsuid;
-        uc->mu_fsgid = rec->sa_fsgid;
-        uc->mu_cap   = rec->sa_cap;
-        uc->mu_suppgids[0] = rec->sa_suppgid;
-        uc->mu_suppgids[1] = -1;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid = rec->sa_fsuid;
+       uc->uc_fsgid = rec->sa_fsgid;
+       uc->uc_cap   = rec->sa_cap;
+       uc->uc_suppgids[0] = rec->sa_suppgid;
+       uc->uc_suppgids[1] = -1;
 
         rr->rr_fid1 = &rec->sa_fid;
         la->la_valid = mdt_attr_valid_xlate(attr_unpack(rec->sa_valid), rr, ma);
@@ -728,6 +839,11 @@ static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
         la->la_mtime = rec->sa_mtime;
         ma->ma_valid = MA_INODE;
 
+       if (rec->sa_bias & MDS_DATA_MODIFIED)
+               ma->ma_attr_flags |= MDS_DATA_MODIFIED;
+       else
+               ma->ma_attr_flags &= ~MDS_DATA_MODIFIED;
+
         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                 mdt_set_capainfo(info, 0, rr->rr_fid1,
                                  req_capsule_client_get(pill, &RMF_CAPA1));
@@ -735,16 +851,17 @@ static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
         RETURN(0);
 }
 
-static int mdt_epoch_unpack(struct mdt_thread_info *info)
+static int mdt_ioepoch_unpack(struct mdt_thread_info *info)
 {
         struct req_capsule *pill = info->mti_pill;
         ENTRY;
 
         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
-                info->mti_epoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
+                info->mti_ioepoch =
+                        req_capsule_client_get(pill, &RMF_MDT_EPOCH);
         else
-                info->mti_epoch = NULL;
-        RETURN(info->mti_epoch == NULL ? -EFAULT : 0);
+                info->mti_ioepoch = NULL;
+        RETURN(info->mti_ioepoch == NULL ? -EFAULT : 0);
 }
 
 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
@@ -755,12 +872,13 @@ static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
                 if (info->mti_dlm_req == NULL)
                         RETURN(-EFAULT);
         }
-        
+
         RETURN(0);
 }
 
 static int mdt_setattr_unpack(struct mdt_thread_info *info)
 {
+        struct mdt_reint_record *rr = &info->mti_rr;
         struct md_attr          *ma = &info->mti_attr;
         struct req_capsule      *pill = info->mti_pill;
         int rc;
@@ -771,19 +889,17 @@ static int mdt_setattr_unpack(struct mdt_thread_info *info)
                 RETURN(rc);
 
         /* Epoch may be absent */
-        mdt_epoch_unpack(info);
+        mdt_ioepoch_unpack(info);
 
-        ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
-        if (ma->ma_lmm_size) {
-                ma->ma_lmm = req_capsule_client_get(pill, &RMF_EADATA);
-                ma->ma_valid |= MA_LOV;
-        }
-
-        ma->ma_cookie_size = req_capsule_get_size(pill, &RMF_LOGCOOKIES,
-                                                  RCL_CLIENT);
-        if (ma->ma_cookie_size) {
-                ma->ma_cookie = req_capsule_client_get(pill, &RMF_LOGCOOKIES);
-                ma->ma_valid |= MA_COOKIE;
+        if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
+                rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
+                rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
+                                                        RCL_CLIENT);
+                ma->ma_lmm_size = rr->rr_eadatalen;
+                if (ma->ma_lmm_size > 0) {
+                        ma->ma_lmm = (void *)rr->rr_eadata;
+                        ma->ma_valid |= MA_LOV;
+                }
         }
 
         rc = mdt_dlmreq_unpack(info);
@@ -795,16 +911,19 @@ int mdt_close_unpack(struct mdt_thread_info *info)
         int rc;
         ENTRY;
 
-        rc = mdt_epoch_unpack(info);
+        rc = mdt_ioepoch_unpack(info);
         if (rc)
                 RETURN(rc);
 
-        RETURN(mdt_setattr_unpack_rec(info));
+       rc = mdt_setattr_unpack_rec(info);
+       if (rc)
+               RETURN(rc);
+       RETURN(mdt_init_ucred_reint(info));
 }
 
 static int mdt_create_unpack(struct mdt_thread_info *info)
 {
-        struct md_ucred         *uc  = mdt_ucred(info);
+       struct lu_ucred         *uc  = mdt_ucred(info);
         struct mdt_rec_create   *rec;
         struct lu_attr          *attr = &info->mti_attr.ma_attr;
         struct mdt_reint_record *rr = &info->mti_rr;
@@ -818,11 +937,13 @@ static int mdt_create_unpack(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid = rec->cr_fsuid;
-        uc->mu_fsgid = rec->cr_fsgid;
-        uc->mu_cap   = rec->cr_cap;
-        uc->mu_suppgids[0] = rec->cr_suppgid1;
-        uc->mu_suppgids[1] = -1;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid = rec->cr_fsuid;
+       uc->uc_fsgid = rec->cr_fsgid;
+       uc->uc_cap   = rec->cr_cap;
+       uc->uc_suppgids[0] = rec->cr_suppgid1;
+       uc->uc_suppgids[1] = -1;
+       uc->uc_umask = rec->cr_umask;
 
         rr->rr_fid1 = &rec->cr_fid1;
         rr->rr_fid2 = &rec->cr_fid2;
@@ -833,56 +954,22 @@ static int mdt_create_unpack(struct mdt_thread_info *info)
         attr->la_ctime = rec->cr_time;
         attr->la_mtime = rec->cr_time;
         attr->la_atime = rec->cr_time;
-        attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID |
-                         LA_CTIME | LA_MTIME | LA_ATIME;
+       attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
+                        LA_CTIME | LA_MTIME | LA_ATIME;
         memset(&sp->u, 0, sizeof(sp->u));
-        sp->sp_cr_flags = rec->cr_flags;
-        sp->sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
-        info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
+        sp->sp_cr_flags = get_mrc_cr_flags(rec);
 
         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                 mdt_set_capainfo(info, 0, rr->rr_fid1,
                                  req_capsule_client_get(pill, &RMF_CAPA1));
         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
 
-        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
-        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
-        LASSERT(rr->rr_name && rr->rr_namelen > 0);
-        
-#ifdef CONFIG_FS_POSIX_ACL
-        if (sp->sp_cr_flags & MDS_CREATE_RMT_ACL) {
-                if (S_ISDIR(attr->la_mode))
-                        sp->u.sp_pfid = rr->rr_fid1;
-                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
-                LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
-                                                  RCL_CLIENT));
-                sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
-                sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
-                                                             RCL_CLIENT);
-                sp->u.sp_ea.fid = rr->rr_fid1;
-                RETURN(0);
-        }
-#endif
-        if (S_ISDIR(attr->la_mode)) {
-                /* pass parent fid for cross-ref cases */
-                sp->u.sp_pfid = rr->rr_fid1;
-                if (sp->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
-                        /* create salve object req, need
-                         * unpack split ea here
-                         */
-                       req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SLAVE);
-                       LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
-                                                         RCL_CLIENT));
-                       sp->u.sp_ea.eadata = req_capsule_client_get(pill,
-                                                                   &RMF_EADATA);
-                       sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
-                                                                    &RMF_EADATA,
-                                                                    RCL_CLIENT);
-                       sp->u.sp_ea.fid = rr->rr_fid1;
-                       RETURN(0);
-                }
-                req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
-        } else if (S_ISLNK(attr->la_mode)) {
+       rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
+       rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME,
+                                             RCL_CLIENT) - 1;
+       LASSERT(rr->rr_name && rr->rr_namelen > 0);
+
+       if (S_ISLNK(attr->la_mode)) {
                 const char *tgt = NULL;
 
                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
@@ -895,13 +982,14 @@ static int mdt_create_unpack(struct mdt_thread_info *info)
         } else {
                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
         }
+
         rc = mdt_dlmreq_unpack(info);
         RETURN(rc);
 }
 
 static int mdt_link_unpack(struct mdt_thread_info *info)
 {
-        struct md_ucred         *uc  = mdt_ucred(info);
+       struct lu_ucred         *uc  = mdt_ucred(info);
         struct mdt_rec_link     *rec;
         struct lu_attr          *attr = &info->mti_attr.ma_attr;
         struct mdt_reint_record *rr = &info->mti_rr;
@@ -914,11 +1002,12 @@ static int mdt_link_unpack(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid = rec->lk_fsuid;
-        uc->mu_fsgid = rec->lk_fsgid;
-        uc->mu_cap   = rec->lk_cap;
-        uc->mu_suppgids[0] = rec->lk_suppgid1;
-        uc->mu_suppgids[1] = rec->lk_suppgid2;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid = rec->lk_fsuid;
+       uc->uc_fsgid = rec->lk_fsgid;
+       uc->uc_cap   = rec->lk_cap;
+       uc->uc_suppgids[0] = rec->lk_suppgid1;
+       uc->uc_suppgids[1] = rec->lk_suppgid2;
 
         attr->la_uid = rec->lk_fsuid;
         attr->la_gid = rec->lk_fsgid;
@@ -939,9 +1028,8 @@ static int mdt_link_unpack(struct mdt_thread_info *info)
         if (rr->rr_name == NULL)
                 RETURN(-EFAULT);
         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
-        LASSERT(rr->rr_namelen > 0);
-        info->mti_spec.sp_ck_split = !!(rec->lk_bias & MDS_CHECK_SPLIT);
-        info->mti_cross_ref = !!(rec->lk_bias & MDS_CROSS_REF);
+
+       LASSERT(rr->rr_namelen > 0);
 
         rc = mdt_dlmreq_unpack(info);
         RETURN(rc);
@@ -949,7 +1037,7 @@ static int mdt_link_unpack(struct mdt_thread_info *info)
 
 static int mdt_unlink_unpack(struct mdt_thread_info *info)
 {
-        struct md_ucred         *uc  = mdt_ucred(info);
+       struct lu_ucred         *uc  = mdt_ucred(info);
         struct mdt_rec_unlink   *rec;
         struct md_attr          *ma = &info->mti_attr;
         struct lu_attr          *attr = &info->mti_attr.ma_attr;
@@ -963,11 +1051,12 @@ static int mdt_unlink_unpack(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid = rec->ul_fsuid;
-        uc->mu_fsgid = rec->ul_fsgid;
-        uc->mu_cap   = rec->ul_cap;
-        uc->mu_suppgids[0] = rec->ul_suppgid1;
-        uc->mu_suppgids[1] = -1;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid = rec->ul_fsuid;
+       uc->uc_fsgid = rec->ul_fsgid;
+       uc->uc_cap   = rec->ul_cap;
+       uc->uc_suppgids[0] = rec->ul_suppgid1;
+       uc->uc_suppgids[1] = -1;
 
         attr->la_uid = rec->ul_fsuid;
         attr->la_gid = rec->ul_fsgid;
@@ -982,25 +1071,25 @@ static int mdt_unlink_unpack(struct mdt_thread_info *info)
                 mdt_set_capainfo(info, 0, rr->rr_fid1,
                                  req_capsule_client_get(pill, &RMF_CAPA1));
 
-        rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
-        if (rr->rr_name == NULL)
-                RETURN(-EFAULT);
-        rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
-        LASSERT(rr->rr_namelen > 0);
-        info->mti_spec.sp_ck_split = !!(rec->ul_bias & MDS_CHECK_SPLIT);
-        info->mti_cross_ref = !!(rec->ul_bias & MDS_CROSS_REF);
+       rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
+       rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
+       if (rr->rr_name == NULL || rr->rr_namelen == 0)
+               RETURN(-EFAULT);
+
         if (rec->ul_bias & MDS_VTX_BYPASS)
                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
         else
                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
 
+        info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
+
         rc = mdt_dlmreq_unpack(info);
         RETURN(rc);
 }
 
 static int mdt_rename_unpack(struct mdt_thread_info *info)
 {
-        struct md_ucred         *uc = mdt_ucred(info);
+       struct lu_ucred         *uc = mdt_ucred(info);
         struct mdt_rec_rename   *rec;
         struct md_attr          *ma = &info->mti_attr;
         struct lu_attr          *attr = &info->mti_attr.ma_attr;
@@ -1014,11 +1103,12 @@ static int mdt_rename_unpack(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid = rec->rn_fsuid;
-        uc->mu_fsgid = rec->rn_fsgid;
-        uc->mu_cap   = rec->rn_cap;
-        uc->mu_suppgids[0] = rec->rn_suppgid1;
-        uc->mu_suppgids[1] = rec->rn_suppgid2;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid = rec->rn_fsuid;
+       uc->uc_fsgid = rec->rn_fsgid;
+       uc->uc_cap   = rec->rn_cap;
+       uc->uc_suppgids[0] = rec->rn_suppgid1;
+       uc->uc_suppgids[1] = rec->rn_suppgid2;
 
         attr->la_uid = rec->rn_fsuid;
         attr->la_gid = rec->rn_fsgid;
@@ -1042,23 +1132,47 @@ static int mdt_rename_unpack(struct mdt_thread_info *info)
         if (rr->rr_name == NULL || rr->rr_tgt == NULL)
                 RETURN(-EFAULT);
         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
-        LASSERT(rr->rr_namelen > 0);
         rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
-        LASSERT(rr->rr_tgtlen > 0);
-        info->mti_spec.sp_ck_split = !!(rec->rn_bias & MDS_CHECK_SPLIT);
-        info->mti_cross_ref = !!(rec->rn_bias & MDS_CROSS_REF);
+       LASSERT(rr->rr_namelen > 0 && rr->rr_tgtlen > 0);
+
         if (rec->rn_bias & MDS_VTX_BYPASS)
                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
         else
                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
 
+        info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
+
         rc = mdt_dlmreq_unpack(info);
         RETURN(rc);
 }
 
+/*
+ * please see comment above LOV_MAGIC_V1_DEF
+ */
+static void mdt_fix_lov_magic(struct mdt_thread_info *info)
+{
+       struct mdt_reint_record *rr = &info->mti_rr;
+       struct lov_user_md_v1   *v1;
+
+       v1 = (void *)rr->rr_eadata;
+       LASSERT(v1);
+
+       if (unlikely(req_is_replay(mdt_info_req(info)))) {
+               if (v1->lmm_magic == LOV_USER_MAGIC_V1) {
+                       v1->lmm_magic = LOV_MAGIC_V1_DEF;
+               } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
+                       v1->lmm_magic = __swab32(LOV_MAGIC_V1_DEF);
+               } else if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
+                       v1->lmm_magic = LOV_MAGIC_V3_DEF;
+               } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
+                       v1->lmm_magic = __swab32(LOV_MAGIC_V3_DEF);
+               }
+       }
+}
+
 static int mdt_open_unpack(struct mdt_thread_info *info)
 {
-        struct md_ucred         *uc = mdt_ucred(info);
+       struct lu_ucred         *uc = mdt_ucred(info);
         struct mdt_rec_create   *rec;
         struct lu_attr          *attr = &info->mti_attr.ma_attr;
         struct req_capsule      *pill = info->mti_pill;
@@ -1072,11 +1186,13 @@ static int mdt_open_unpack(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid = rec->cr_fsuid;
-        uc->mu_fsgid = rec->cr_fsgid;
-        uc->mu_cap   = rec->cr_cap;
-        uc->mu_suppgids[0] = rec->cr_suppgid1;
-        uc->mu_suppgids[1] = rec->cr_suppgid2;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid = rec->cr_fsuid;
+       uc->uc_fsgid = rec->cr_fsgid;
+       uc->uc_cap   = rec->cr_cap;
+       uc->uc_suppgids[0] = rec->cr_suppgid1;
+       uc->uc_suppgids[1] = rec->cr_suppgid2;
+       uc->uc_umask = rec->cr_umask;
 
         rr->rr_fid1   = &rec->cr_fid1;
         rr->rr_fid2   = &rec->cr_fid2;
@@ -1091,17 +1207,19 @@ static int mdt_open_unpack(struct mdt_thread_info *info)
         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
                          LA_CTIME | LA_MTIME | LA_ATIME;
         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
-        info->mti_spec.sp_cr_flags = rec->cr_flags;
+        info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
+        /* Do not trigger ASSERTION if client miss to set such flags. */
+        if (unlikely(info->mti_spec.sp_cr_flags == 0))
+                RETURN(-EPROTO);
         info->mti_replayepoch = rec->cr_ioepoch;
 
-        info->mti_spec.sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
 
         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
                 mdt_set_capainfo(info, 0, rr->rr_fid1,
                                  req_capsule_client_get(pill, &RMF_CAPA1));
-        if ((lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
-            (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))) {
+        if (req_is_replay(req) &&
+            req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
 #if 0
                 mdt_set_capainfo(info, 1, rr->rr_fid2,
                                  req_capsule_client_get(pill, &RMF_CAPA2));
@@ -1120,13 +1238,27 @@ static int mdt_open_unpack(struct mdt_thread_info *info)
                 RETURN(-EFAULT);
         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
 
-        sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
-                                                     RCL_CLIENT);
-        if (sp->u.sp_ea.eadatalen) {
-                sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
-                if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
-                        sp->u.sp_ea.no_lov_create = 1;
-        }
+        if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
+                rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
+                                                        RCL_CLIENT);
+                if (rr->rr_eadatalen > 0) {
+                        rr->rr_eadata = req_capsule_client_get(pill,
+                                                               &RMF_EADATA);
+                        sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
+                        sp->u.sp_ea.eadata = rr->rr_eadata;
+                        sp->no_create = !!req_is_replay(req);
+                       mdt_fix_lov_magic(info);
+                }
+
+                /*
+                 * Client default md_size may be 0 right after client start,
+                 * until all osc are connected, set here just some reasonable
+                 * value to prevent misbehavior.
+                 */
+                if (rr->rr_eadatalen == 0 &&
+                    !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
+                       rr->rr_eadatalen = MIN_MD_SIZE;
+       }
 
         RETURN(0);
 }
@@ -1134,7 +1266,7 @@ static int mdt_open_unpack(struct mdt_thread_info *info)
 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
 {
         struct mdt_reint_record   *rr   = &info->mti_rr;
-        struct md_ucred           *uc   = mdt_ucred(info);
+       struct lu_ucred           *uc   = mdt_ucred(info);
         struct lu_attr            *attr = &info->mti_attr.ma_attr;
         struct req_capsule        *pill = info->mti_pill;
         struct mdt_rec_setxattr   *rec;
@@ -1148,11 +1280,12 @@ static int mdt_setxattr_unpack(struct mdt_thread_info *info)
         if (rec == NULL)
                 RETURN(-EFAULT);
 
-        uc->mu_fsuid  = rec->sx_fsuid;
-        uc->mu_fsgid  = rec->sx_fsgid;
-        uc->mu_cap    = rec->sx_cap;
-        uc->mu_suppgids[0] = rec->sx_suppgid1;
-        uc->mu_suppgids[1] = -1;
+       /* This prior initialization is needed for old_init_ucred_reint() */
+       uc->uc_fsuid  = rec->sx_fsuid;
+       uc->uc_fsgid  = rec->sx_fsgid;
+       uc->uc_cap    = rec->sx_cap;
+       uc->uc_suppgids[0] = rec->sx_suppgid1;
+       uc->uc_suppgids[1] = -1;
 
         rr->rr_opcode = rec->sx_opcode;
         rr->rr_fid1   = &rec->sx_fid;
@@ -1173,11 +1306,20 @@ static int mdt_setxattr_unpack(struct mdt_thread_info *info)
         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
         LASSERT(rr->rr_namelen > 0);
 
-        rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
-        if (rr->rr_eadatalen > 0) {
-                rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
-                if (rr->rr_eadata == NULL)
-                        RETURN(-EFAULT);
+        if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
+                rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
+                                                        RCL_CLIENT);
+                if (rr->rr_eadatalen > 0) {
+                        rr->rr_eadata = req_capsule_client_get(pill,
+                                                               &RMF_EADATA);
+                        if (rr->rr_eadata == NULL)
+                                RETURN(-EFAULT);
+                } else {
+                        rr->rr_eadata = NULL;
+                }
+        } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
+                CDEBUG(D_INFO, "no xattr data supplied\n");
+                RETURN(-EFAULT);
         }
 
         RETURN(0);