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LU-12635 build: Support for gcc -Wimplicit-fallthrough
[fs/lustre-release.git] / lustre / target / out_handler.c
index ab75768..f3ec5a7 100644 (file)
@@ -20,9 +20,9 @@
  * GPL HEADER END
  */
 /*
- * Copyright (c) 2013, Intel Corporation.
+ * Copyright (c) 2013, 2017, Intel Corporation.
  *
- * lustre/mdt/out_handler.c
+ * lustre/target/out_handler.c
  *
  * Object update handler between targets.
  *
 
 #define DEBUG_SUBSYSTEM S_CLASS
 
-#include <obd_class.h>
+#include <llog_swab.h>
+#include <lustre_obdo.h>
+#include <lustre_swab.h>
+#include <lustre_update.h>
 #include <md_object.h>
+#include <obd_class.h>
 #include "tgt_internal.h"
-#include <lustre_update.h>
 
-struct tx_arg *tx_add_exec(struct thandle_exec_args *ta, tx_exec_func_t func,
-                          tx_exec_func_t undo, char *file, int line)
+static inline void orr_cpu_to_le(struct out_read_reply *orr_dst,
+                                const struct out_read_reply *orr_src)
 {
-       int i;
-
-       LASSERT(ta);
-       LASSERT(func);
-
-       i = ta->ta_argno;
-       LASSERT(i < UPDATE_MAX_OPS);
-
-       ta->ta_argno++;
-
-       ta->ta_args[i].exec_fn = func;
-       ta->ta_args[i].undo_fn = undo;
-       ta->ta_args[i].file    = file;
-       ta->ta_args[i].line    = line;
-
-       return &ta->ta_args[i];
-}
-
-static int out_tx_start(const struct lu_env *env, struct dt_device *dt,
-                       struct thandle_exec_args *ta)
-{
-       memset(ta, 0, sizeof(*ta));
-       ta->ta_handle = dt_trans_create(env, dt);
-       if (IS_ERR(ta->ta_handle)) {
-               CERROR("%s: start handle error: rc = %ld\n",
-                      dt_obd_name(dt), PTR_ERR(ta->ta_handle));
-               return PTR_ERR(ta->ta_handle);
-       }
-       ta->ta_dev = dt;
-       /*For phase I, sync for cross-ref operation*/
-       ta->ta_handle->th_sync = 1;
-       return 0;
-}
-
-static int out_trans_start(const struct lu_env *env,
-                          struct thandle_exec_args *ta)
-{
-       /* Always do sync commit for Phase I */
-       LASSERT(ta->ta_handle->th_sync != 0);
-       return dt_trans_start(env, ta->ta_dev, ta->ta_handle);
-}
-
-static int out_trans_stop(const struct lu_env *env,
-                         struct thandle_exec_args *ta, int err)
-{
-       int i;
-       int rc;
-
-       ta->ta_handle->th_result = err;
-       LASSERT(ta->ta_handle->th_sync != 0);
-       rc = dt_trans_stop(env, ta->ta_dev, ta->ta_handle);
-       for (i = 0; i < ta->ta_argno; i++) {
-               if (ta->ta_args[i].object != NULL) {
-                       lu_object_put(env, &ta->ta_args[i].object->do_lu);
-                       ta->ta_args[i].object = NULL;
-               }
-       }
-
-       return rc;
-}
-
-int out_tx_end(const struct lu_env *env, struct thandle_exec_args *ta)
-{
-       struct tgt_session_info *tsi = tgt_ses_info(env);
-       int i = 0, rc;
-
-       LASSERT(ta->ta_dev);
-       LASSERT(ta->ta_handle);
-
-       if (ta->ta_err != 0 || ta->ta_argno == 0)
-               GOTO(stop, rc = ta->ta_err);
-
-       rc = out_trans_start(env, ta);
-       if (unlikely(rc))
-               GOTO(stop, rc);
-
-       for (i = 0; i < ta->ta_argno; i++) {
-               rc = ta->ta_args[i].exec_fn(env, ta->ta_handle,
-                                           &ta->ta_args[i]);
-               if (unlikely(rc)) {
-                       CDEBUG(D_INFO, "error during execution of #%u from"
-                              " %s:%d: rc = %d\n", i, ta->ta_args[i].file,
-                              ta->ta_args[i].line, rc);
-                       while (--i >= 0) {
-                               LASSERTF(ta->ta_args[i].undo_fn != NULL,
-                                   "can't undo changes, hope for failover!\n");
-                               ta->ta_args[i].undo_fn(env, ta->ta_handle,
-                                                      &ta->ta_args[i]);
-                       }
-                       break;
-               }
-       }
-
-       /* Only fail for real update */
-       tsi->tsi_reply_fail_id = OBD_FAIL_UPDATE_OBJ_NET_REP;
-stop:
-       CDEBUG(D_INFO, "%s: executed %u/%u: rc = %d\n",
-              dt_obd_name(ta->ta_dev), i, ta->ta_argno, rc);
-       out_trans_stop(env, ta, rc);
-       ta->ta_handle = NULL;
-       ta->ta_argno = 0;
-       ta->ta_err = 0;
-
-       RETURN(rc);
+       orr_dst->orr_size = cpu_to_le32(orr_src->orr_size);
+       orr_dst->orr_padding = cpu_to_le32(orr_src->orr_padding);
+       orr_dst->orr_offset = cpu_to_le64(orr_dst->orr_offset);
 }
 
 static void out_reconstruct(const struct lu_env *env, struct dt_device *dt,
-                           struct dt_object *obj, struct update_reply *reply,
+                           struct dt_object *obj,
+                           struct object_update_reply *reply,
                            int index)
 {
        CDEBUG(D_INFO, "%s: fork reply reply %p index %d: rc = %d\n",
               dt_obd_name(dt), reply, index, 0);
 
-       update_insert_reply(reply, NULL, 0, index, 0);
+       object_update_result_insert(reply, NULL, 0, index, 0);
        return;
 }
 
 typedef void (*out_reconstruct_t)(const struct lu_env *env,
                                  struct dt_device *dt,
                                  struct dt_object *obj,
-                                 struct update_reply *reply,
+                                 struct object_update_reply *reply,
                                  int index);
 
 static inline int out_check_resent(const struct lu_env *env,
@@ -167,155 +70,77 @@ static inline int out_check_resent(const struct lu_env *env,
                                   struct dt_object *obj,
                                   struct ptlrpc_request *req,
                                   out_reconstruct_t reconstruct,
-                                  struct update_reply *reply,
+                                  struct object_update_reply *reply,
                                   int index)
 {
        if (likely(!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT)))
                return 0;
 
        if (req_xid_is_last(req)) {
-               reconstruct(env, dt, obj, reply, index);
-               return 1;
-       }
-       DEBUG_REQ(D_HA, req, "no reply for RESENT req (have "LPD64")",
-                req->rq_export->exp_target_data.ted_lcd->lcd_last_xid);
-       return 0;
-}
-
-static int out_obj_destroy(const struct lu_env *env, struct dt_object *dt_obj,
-                          struct thandle *th)
-{
-       int rc;
-
-       CDEBUG(D_INFO, "%s: destroy "DFID"\n", dt_obd_name(th->th_dev),
-              PFID(lu_object_fid(&dt_obj->do_lu)));
+               struct lsd_client_data *lcd;
 
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_destroy(env, dt_obj, th);
-       dt_write_unlock(env, dt_obj);
+               /* XXX this does not support mulitple transactions yet, i.e.
+                * only 1 update RPC each time betwee MDTs */
+               lcd = req->rq_export->exp_target_data.ted_lcd;
 
-       return rc;
-}
+               req->rq_transno = lcd->lcd_last_transno;
+               req->rq_status = lcd->lcd_last_result;
+               if (req->rq_status != 0)
+                       req->rq_transno = 0;
+               lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
+               lustre_msg_set_status(req->rq_repmsg, req->rq_status);
 
-/**
- * All of the xxx_undo will be used once execution failed,
- * But because all of the required resource has been reserved in
- * declare phase, i.e. if declare succeed, it should make sure
- * the following executing phase succeed in anyway, so these undo
- * should be useless for most of the time in Phase I
- */
-int out_tx_create_undo(const struct lu_env *env, struct thandle *th,
-                      struct tx_arg *arg)
-{
-       int rc;
-
-       rc = out_obj_destroy(env, arg->object, th);
-       if (rc != 0)
-               CERROR("%s: undo failure, we are doomed!: rc = %d\n",
-                      dt_obd_name(th->th_dev), rc);
-       return rc;
-}
-
-int out_tx_create_exec(const struct lu_env *env, struct thandle *th,
-                      struct tx_arg *arg)
-{
-       struct dt_object        *dt_obj = arg->object;
-       int                      rc;
-
-       CDEBUG(D_OTHER, "%s: create "DFID": dof %u, mode %o\n",
-              dt_obd_name(th->th_dev),
-              PFID(lu_object_fid(&arg->object->do_lu)),
-              arg->u.create.dof.dof_type,
-              arg->u.create.attr.la_mode & S_IFMT);
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_create(env, dt_obj, &arg->u.create.attr,
-                      &arg->u.create.hint, &arg->u.create.dof, th);
-
-       dt_write_unlock(env, dt_obj);
-
-       CDEBUG(D_INFO, "%s: insert create reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-
-       return rc;
-}
-
-static int __out_tx_create(const struct lu_env *env, struct dt_object *obj,
-                          struct lu_attr *attr, struct lu_fid *parent_fid,
-                          struct dt_object_format *dof,
-                          struct thandle_exec_args *ta,
-                          struct update_reply *reply,
-                          int index, char *file, int line)
-{
-       struct tx_arg *arg;
-
-       LASSERT(ta->ta_handle != NULL);
-       ta->ta_err = dt_declare_create(env, obj, attr, NULL, dof,
-                                      ta->ta_handle);
-       if (ta->ta_err != 0)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_create_exec, out_tx_create_undo, file,
-                         line);
-       LASSERT(arg);
-
-       /* release the object in out_trans_stop */
-       lu_object_get(&obj->do_lu);
-       arg->object = obj;
-       arg->u.create.attr = *attr;
-       if (parent_fid)
-               arg->u.create.fid = *parent_fid;
-       memset(&arg->u.create.hint, 0, sizeof(arg->u.create.hint));
-       arg->u.create.dof  = *dof;
-       arg->reply = reply;
-       arg->index = index;
+               DEBUG_REQ(D_RPCTRACE, req, "restoring resent RPC");
 
+               reconstruct(env, dt, obj, reply, index);
+               return 1;
+       }
+       DEBUG_REQ(D_HA, req, "no reply for RESENT req (have %lld)",
+                req->rq_export->exp_target_data.ted_lcd->lcd_last_xid);
        return 0;
 }
 
 static int out_create(struct tgt_session_info *tsi)
 {
        struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
-       struct update           *update = tti->tti_u.update.tti_update;
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
        struct dt_object_format *dof = &tti->tti_u.update.tti_update_dof;
        struct obdo             *lobdo = &tti->tti_u.update.tti_obdo;
        struct lu_attr          *attr = &tti->tti_attr;
        struct lu_fid           *fid = NULL;
        struct obdo             *wobdo;
-       int                     size;
+       size_t                  size;
        int                     rc;
 
        ENTRY;
 
-       wobdo = update_param_buf(update, 0, &size);
-       if (wobdo == NULL || size != sizeof(*wobdo)) {
-               CERROR("%s: obdo is NULL, invalid RPC: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       wobdo = object_update_param_get(update, 0, &size);
+       if (IS_ERR(wobdo) || size != sizeof(*wobdo)) {
+               CERROR("%s: obdo is NULL, invalid RPC: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(wobdo));
+               RETURN(PTR_ERR(wobdo));
        }
 
-       obdo_le_to_cpu(wobdo, wobdo);
+       if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+               lustre_swab_obdo(wobdo);
        lustre_get_wire_obdo(NULL, lobdo, wobdo);
        la_from_obdo(attr, lobdo, lobdo->o_valid);
 
        dof->dof_type = dt_mode_to_dft(attr->la_mode);
-       if (S_ISDIR(attr->la_mode)) {
-               int size;
-
-               fid = update_param_buf(update, 1, &size);
-               if (fid == NULL || size != sizeof(*fid)) {
-                       CERROR("%s: invalid fid: rc = %d\n",
-                              tgt_name(tsi->tsi_tgt), -EPROTO);
-                       RETURN(err_serious(-EPROTO));
+       if (update->ou_params_count > 1) {
+               fid = object_update_param_get(update, 1, &size);
+               if (IS_ERR(fid) || size != sizeof(*fid)) {
+                       CERROR("%s: invalid fid: rc = %ld\n",
+                              tgt_name(tsi->tsi_tgt), PTR_ERR(fid));
+                       RETURN(PTR_ERR(fid));
                }
-               fid_le_to_cpu(fid, fid);
+               if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+                       lustre_swab_lu_fid(fid);
                if (!fid_is_sane(fid)) {
                        CERROR("%s: invalid fid "DFID": rc = %d\n",
                               tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
-                       RETURN(err_serious(-EPROTO));
+                       RETURN(-EPROTO);
                }
        }
 
@@ -323,96 +148,43 @@ static int out_create(struct tgt_session_info *tsi)
                RETURN(-EEXIST);
 
        rc = out_tx_create(tsi->tsi_env, obj, attr, fid, dof,
-                          &tti->tti_tea,
+                          &tti->tti_tea, tti->tti_tea.ta_handle,
                           tti->tti_u.update.tti_update_reply,
                           tti->tti_u.update.tti_update_reply_index);
 
        RETURN(rc);
 }
 
-static int out_tx_attr_set_undo(const struct lu_env *env,
-                               struct thandle *th, struct tx_arg *arg)
-{
-       CERROR("%s: attr set undo "DFID" unimplemented yet!: rc = %d\n",
-              dt_obd_name(th->th_dev),
-              PFID(lu_object_fid(&arg->object->do_lu)), -ENOTSUPP);
-
-       return -ENOTSUPP;
-}
-
-static int out_tx_attr_set_exec(const struct lu_env *env, struct thandle *th,
-                               struct tx_arg *arg)
-{
-       struct dt_object        *dt_obj = arg->object;
-       int                     rc;
-
-       CDEBUG(D_OTHER, "%s: attr set "DFID"\n", dt_obd_name(th->th_dev),
-              PFID(lu_object_fid(&dt_obj->do_lu)));
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_attr_set(env, dt_obj, &arg->u.attr_set.attr, th, NULL);
-       dt_write_unlock(env, dt_obj);
-
-       CDEBUG(D_INFO, "%s: insert attr_set reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-
-       return rc;
-}
-
-static int __out_tx_attr_set(const struct lu_env *env,
-                            struct dt_object *dt_obj,
-                            const struct lu_attr *attr,
-                            struct thandle_exec_args *th,
-                            struct update_reply *reply, int index,
-                            char *file, int line)
-{
-       struct tx_arg           *arg;
-
-       LASSERT(th->ta_handle != NULL);
-       th->ta_err = dt_declare_attr_set(env, dt_obj, attr, th->ta_handle);
-       if (th->ta_err != 0)
-               return th->ta_err;
-
-       arg = tx_add_exec(th, out_tx_attr_set_exec, out_tx_attr_set_undo,
-                         file, line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->u.attr_set.attr = *attr;
-       arg->reply = reply;
-       arg->index = index;
-       return 0;
-}
-
 static int out_attr_set(struct tgt_session_info *tsi)
 {
        struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
-       struct update           *update = tti->tti_u.update.tti_update;
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct lu_attr          *attr = &tti->tti_attr;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
        struct obdo             *lobdo = &tti->tti_u.update.tti_obdo;
        struct obdo             *wobdo;
-       int                      size;
+       size_t                   size;
        int                      rc;
 
        ENTRY;
 
-       wobdo = update_param_buf(update, 0, &size);
-       if (wobdo == NULL || size != sizeof(*wobdo)) {
-               CERROR("%s: empty obdo in the update: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       wobdo = object_update_param_get(update, 0, &size);
+       if (IS_ERR(wobdo) || size != sizeof(*wobdo)) {
+               CERROR("%s: empty obdo in the update: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(wobdo));
+               RETURN(PTR_ERR(wobdo));
        }
 
        attr->la_valid = 0;
        attr->la_valid = 0;
-       obdo_le_to_cpu(wobdo, wobdo);
+
+       if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+               lustre_swab_obdo(wobdo);
        lustre_get_wire_obdo(NULL, lobdo, wobdo);
        la_from_obdo(attr, lobdo, lobdo->o_valid);
 
        rc = out_tx_attr_set(tsi->tsi_env, obj, attr, &tti->tti_tea,
+                            tti->tti_tea.ta_handle,
                             tti->tti_u.update.tti_update_reply,
                             tti->tti_u.update.tti_update_reply_index);
 
@@ -423,61 +195,35 @@ static int out_attr_get(struct tgt_session_info *tsi)
 {
        const struct lu_env     *env = tsi->tsi_env;
        struct tgt_thread_info  *tti = tgt_th_info(env);
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct obdo             *obdo = &tti->tti_u.update.tti_obdo;
        struct lu_attr          *la = &tti->tti_attr;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
+       int                     idx = tti->tti_u.update.tti_update_reply_index;
        int                     rc;
 
        ENTRY;
 
-       if (!lu_object_exists(&obj->do_lu))
+       if (unlikely(update->ou_result_size < sizeof(*obdo)))
+               return -EPROTO;
+
+       if (!lu_object_exists(&obj->do_lu)) {
+               /* Usually, this will be called when the master MDT try
+                * to init a remote object(see osp_object_init), so if
+                * the object does not exist on slave, we need set BANSHEE flag,
+                * so the object can be removed from the cache immediately */
+               set_bit(LU_OBJECT_HEARD_BANSHEE,
+                       &obj->do_lu.lo_header->loh_flags);
                RETURN(-ENOENT);
+       }
 
-       dt_read_lock(env, obj, MOR_TGT_CHILD);
-       rc = dt_attr_get(env, obj, la, NULL);
+       dt_read_lock(env, obj, DT_TGT_CHILD);
+       rc = dt_attr_get(env, obj, la);
        if (rc)
                GOTO(out_unlock, rc);
-       /*
-        * If it is a directory, we will also check whether the
-        * directory is empty.
-        * la_flags = 0 : Empty.
-        *          = 1 : Not empty.
-        */
-       la->la_flags = 0;
-       if (S_ISDIR(la->la_mode)) {
-               struct dt_it            *it;
-               const struct dt_it_ops  *iops;
-
-               if (!dt_try_as_dir(env, obj))
-                       GOTO(out_unlock, rc = -ENOTDIR);
-
-               iops = &obj->do_index_ops->dio_it;
-               it = iops->init(env, obj, LUDA_64BITHASH, BYPASS_CAPA);
-               if (!IS_ERR(it)) {
-                       int  result;
-                       result = iops->get(env, it, (const void *)"");
-                       if (result > 0) {
-                               int i;
-                               for (result = 0, i = 0; result == 0 && i < 3;
-                                    ++i)
-                                       result = iops->next(env, it);
-                               if (result == 0)
-                                       la->la_flags = 1;
-                       } else if (result == 0)
-                               /*
-                                * Huh? Index contains no zero key?
-                                */
-                               rc = -EIO;
-
-                       iops->put(env, it);
-                       iops->fini(env, it);
-               }
-       }
 
        obdo->o_valid = 0;
        obdo_from_la(obdo, la, la->la_valid);
-       obdo_cpu_to_le(obdo, obdo);
-       lustre_set_wire_obdo(NULL, obdo, obdo);
 
 out_unlock:
        dt_read_unlock(env, obj);
@@ -486,87 +232,157 @@ out_unlock:
               tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
               0, rc);
 
-       update_insert_reply(tti->tti_u.update.tti_update_reply, obdo,
-                           sizeof(*obdo), 0, rc);
+       object_update_result_insert(tti->tti_u.update.tti_update_reply, obdo,
+                                   sizeof(*obdo), idx, rc);
+
        RETURN(rc);
 }
 
 static int out_xattr_get(struct tgt_session_info *tsi)
 {
-       const struct lu_env     *env = tsi->tsi_env;
-       struct tgt_thread_info  *tti = tgt_th_info(env);
-       struct update           *update = tti->tti_u.update.tti_update;
-       struct lu_buf           *lbuf = &tti->tti_buf;
-       struct update_reply     *reply = tti->tti_u.update.tti_update_reply;
-       struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
-       char                    *name;
-       void                    *ptr;
-       int                      rc;
+       const struct lu_env        *env = tsi->tsi_env;
+       struct tgt_thread_info     *tti = tgt_th_info(env);
+       struct object_update       *update = tti->tti_u.update.tti_update;
+       struct lu_buf              *lbuf = &tti->tti_buf;
+       struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
+       struct dt_object           *obj = tti->tti_u.update.tti_dt_object;
+       char                       *name;
+       struct object_update_result *update_result;
+       int                     idx = tti->tti_u.update.tti_update_reply_index;
+       int                        rc;
 
        ENTRY;
 
-       name = (char *)update_param_buf(update, 0, NULL);
-       if (name == NULL) {
+       if (!lu_object_exists(&obj->do_lu)) {
+               set_bit(LU_OBJECT_HEARD_BANSHEE,
+                       &obj->do_lu.lo_header->loh_flags);
+               RETURN(-ENOENT);
+       }
+
+       name = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(name)) {
+               CERROR("%s: empty name for xattr get: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(name));
+               RETURN(PTR_ERR(name));
+       }
+
+       update_result = object_update_result_get(reply, idx, NULL);
+       if (update_result == NULL) {
                CERROR("%s: empty name for xattr get: rc = %d\n",
                       tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+               RETURN(-EPROTO);
        }
 
-       ptr = update_get_buf_internal(reply, 0, NULL);
-       LASSERT(ptr != NULL);
+       lbuf->lb_len = (int)tti->tti_u.update.tti_update->ou_result_size;
+       if (lbuf->lb_len == 0)
+               lbuf->lb_buf = NULL;
+       else
+               lbuf->lb_buf = update_result->our_data;
 
-       /* The first 4 bytes(int) are used to store the result */
-       lbuf->lb_buf = (char *)ptr + sizeof(int);
-       lbuf->lb_len = UPDATE_BUFFER_SIZE - sizeof(struct update_reply);
-       dt_read_lock(env, obj, MOR_TGT_CHILD);
-       rc = dt_xattr_get(env, obj, lbuf, name, NULL);
+       dt_read_lock(env, obj, DT_TGT_CHILD);
+       rc = dt_xattr_get(env, obj, lbuf, name);
        dt_read_unlock(env, obj);
-       if (rc < 0) {
+       if (rc <= 0) {
                lbuf->lb_len = 0;
-               GOTO(out, rc);
+               if (unlikely(!rc))
+                       rc = -ENODATA;
+       } else if (lbuf->lb_buf) {
+               lbuf->lb_len = rc;
        }
-       if (rc == 0) {
-               lbuf->lb_len = 0;
-               GOTO(out, rc = -ENOENT);
-       }
-       lbuf->lb_len = rc;
-       rc = 0;
        CDEBUG(D_INFO, "%s: "DFID" get xattr %s len %d\n",
               tgt_name(tsi->tsi_tgt), PFID(lu_object_fid(&obj->do_lu)),
-              name, (int)lbuf->lb_len);
+              name, rc);
+
+       GOTO(out, rc);
+
 out:
-       *(int *)ptr = rc;
-       reply->ur_lens[0] = lbuf->lb_len + sizeof(int);
-       RETURN(rc);
+       object_update_result_insert(reply, lbuf->lb_buf, lbuf->lb_len, idx, rc);
+       RETURN(0);
+}
+
+static int out_xattr_list(struct tgt_session_info *tsi)
+{
+       const struct lu_env *env = tsi->tsi_env;
+       struct tgt_thread_info *tti = tgt_th_info(env);
+       struct lu_buf *lbuf = &tti->tti_buf;
+       struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
+       struct dt_object *obj = tti->tti_u.update.tti_dt_object;
+       struct object_update_result *update_result;
+       int idx = tti->tti_u.update.tti_update_reply_index;
+       int rc;
+
+       ENTRY;
+
+       if (!lu_object_exists(&obj->do_lu)) {
+               set_bit(LU_OBJECT_HEARD_BANSHEE,
+                       &obj->do_lu.lo_header->loh_flags);
+               RETURN(-ENOENT);
+       }
+
+       update_result = object_update_result_get(reply, 0, NULL);
+       if (!update_result) {
+               rc = -EPROTO;
+               CERROR("%s: empty buf for xattr list: rc = %d\n",
+                      tgt_name(tsi->tsi_tgt), rc);
+               RETURN(rc);
+       }
+
+       lbuf->lb_len = (int)tti->tti_u.update.tti_update->ou_result_size;
+       lbuf->lb_buf = update_result->our_data;
+       if (lbuf->lb_len == 0)
+               lbuf->lb_buf = 0;
+
+       dt_read_lock(env, obj, DT_TGT_CHILD);
+       rc = dt_xattr_list(env, obj, lbuf);
+       dt_read_unlock(env, obj);
+       if (rc <= 0) {
+               lbuf->lb_len = 0;
+               if (unlikely(!rc))
+                       rc = -ENODATA;
+       } else if (lbuf->lb_buf) {
+               lbuf->lb_len = rc;
+       }
+
+       CDEBUG(D_INFO, "%s: "DFID" list xattr len %d\n",
+              tgt_name(tsi->tsi_tgt), PFID(lu_object_fid(&obj->do_lu)), rc);
+
+       /* Since we directly use update_result->our_data as the lbuf->lb_buf,
+        * then use NULL for result_insert to avoid unnecessary memory copy. */
+       object_update_result_insert(reply, NULL, lbuf->lb_len, idx, rc);
+
+       RETURN(0);
 }
 
 static int out_index_lookup(struct tgt_session_info *tsi)
 {
        const struct lu_env     *env = tsi->tsi_env;
        struct tgt_thread_info  *tti = tgt_th_info(env);
-       struct update           *update = tti->tti_u.update.tti_update;
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
        char                    *name;
        int                      rc;
 
        ENTRY;
 
+       if (unlikely(update->ou_result_size < sizeof(tti->tti_fid1)))
+               return -EPROTO;
+
        if (!lu_object_exists(&obj->do_lu))
                RETURN(-ENOENT);
 
-       name = (char *)update_param_buf(update, 0, NULL);
-       if (name == NULL) {
-               CERROR("%s: empty name for lookup: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       name = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(name)) {
+               CERROR("%s: empty name for lookup: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(name));
+               RETURN(PTR_ERR(name));
        }
 
-       dt_read_lock(env, obj, MOR_TGT_CHILD);
+       dt_read_lock(env, obj, DT_TGT_CHILD);
        if (!dt_try_as_dir(env, obj))
                GOTO(out_unlock, rc = -ENOTDIR);
 
        rc = dt_lookup(env, obj, (struct dt_rec *)&tti->tti_fid1,
-               (struct dt_key *)name, NULL);
+                      (struct dt_key *)name);
 
        if (rc < 0)
                GOTO(out_unlock, rc);
@@ -574,198 +390,92 @@ static int out_index_lookup(struct tgt_session_info *tsi)
        if (rc == 0)
                rc += 1;
 
+out_unlock:
+       dt_read_unlock(env, obj);
+
        CDEBUG(D_INFO, "lookup "DFID" %s get "DFID" rc %d\n",
               PFID(lu_object_fid(&obj->do_lu)), name,
               PFID(&tti->tti_fid1), rc);
-       fid_cpu_to_le(&tti->tti_fid1, &tti->tti_fid1);
-
-out_unlock:
-       dt_read_unlock(env, obj);
 
        CDEBUG(D_INFO, "%s: insert lookup reply %p index %d: rc = %d\n",
               tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
               0, rc);
 
-       update_insert_reply(tti->tti_u.update.tti_update_reply,
-                           &tti->tti_fid1, sizeof(tti->tti_fid1), 0, rc);
+       object_update_result_insert(tti->tti_u.update.tti_update_reply,
+                           &tti->tti_fid1, sizeof(tti->tti_fid1),
+                           tti->tti_u.update.tti_update_reply_index, rc);
        RETURN(rc);
 }
 
-static int out_tx_xattr_set_exec(const struct lu_env *env,
-                                struct thandle *th,
-                                struct tx_arg *arg)
-{
-       struct dt_object *dt_obj = arg->object;
-       int rc;
-
-       CDEBUG(D_INFO, "%s: set xattr buf %p name %s flag %d\n",
-              dt_obd_name(th->th_dev), arg->u.xattr_set.buf.lb_buf,
-              arg->u.xattr_set.name, arg->u.xattr_set.flags);
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_xattr_set(env, dt_obj, &arg->u.xattr_set.buf,
-                         arg->u.xattr_set.name, arg->u.xattr_set.flags,
-                         th, NULL);
-       dt_write_unlock(env, dt_obj);
-       /**
-        * Ignore errors if this is LINK EA
-        **/
-       if (unlikely(rc && !strncmp(arg->u.xattr_set.name, XATTR_NAME_LINK,
-                                   strlen(XATTR_NAME_LINK))))
-               rc = 0;
-
-       CDEBUG(D_INFO, "%s: insert xattr set reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-
-       return rc;
-}
-
-static int __out_tx_xattr_set(const struct lu_env *env,
-                             struct dt_object *dt_obj,
-                             const struct lu_buf *buf,
-                             const char *name, int flags,
-                             struct thandle_exec_args *ta,
-                             struct update_reply *reply, int index,
-                             char *file, int line)
-{
-       struct tx_arg           *arg;
-
-       LASSERT(ta->ta_handle != NULL);
-       ta->ta_err = dt_declare_xattr_set(env, dt_obj, buf, name,
-                                         flags, ta->ta_handle);
-       if (ta->ta_err != 0)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_xattr_set_exec, NULL, file, line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->u.xattr_set.name = name;
-       arg->u.xattr_set.flags = flags;
-       arg->u.xattr_set.buf = *buf;
-       arg->reply = reply;
-       arg->index = index;
-       arg->u.xattr_set.csum = 0;
-       return 0;
-}
-
 static int out_xattr_set(struct tgt_session_info *tsi)
 {
        struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
-       struct update           *update = tti->tti_u.update.tti_update;
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
        struct lu_buf           *lbuf = &tti->tti_buf;
        char                    *name;
        char                    *buf;
-       char                    *tmp;
-       int                      buf_len = 0;
+       __u32                   *tmp;
+       size_t                   buf_len = 0;
        int                      flag;
+       size_t                   size = 0;
        int                      rc;
        ENTRY;
 
-       name = update_param_buf(update, 0, NULL);
-       if (name == NULL) {
-               CERROR("%s: empty name for xattr set: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       name = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(name)) {
+               CERROR("%s: empty name for xattr set: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(name));
+               RETURN(PTR_ERR(name));
        }
 
-       buf = (char *)update_param_buf(update, 1, &buf_len);
-       if (buf == NULL || buf_len == 0) {
-               CERROR("%s: empty buf for xattr set: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
-       }
+       /* If buffer == NULL (-ENODATA), then it might mean delete xattr */
+       buf = object_update_param_get(update, 1, &buf_len);
+       if (IS_ERR(buf) && PTR_ERR(buf) != -ENODATA)
+               RETURN(PTR_ERR(buf));
 
        lbuf->lb_buf = buf;
        lbuf->lb_len = buf_len;
 
-       tmp = (char *)update_param_buf(update, 2, NULL);
-       if (tmp == NULL) {
-               CERROR("%s: empty flag for xattr set: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       tmp = object_update_param_get(update, 2, &size);
+       if (IS_ERR(tmp) || size != sizeof(*tmp)) {
+               CERROR("%s: emptry or wrong size %zu flag: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
+               RETURN(PTR_ERR(tmp));
        }
 
-       flag = le32_to_cpu(*(int *)tmp);
+       if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+               __swab32s(tmp);
+       flag = *tmp;
 
        rc = out_tx_xattr_set(tsi->tsi_env, obj, lbuf, name, flag,
-                             &tti->tti_tea,
+                             &tti->tti_tea, tti->tti_tea.ta_handle,
                              tti->tti_u.update.tti_update_reply,
                              tti->tti_u.update.tti_update_reply_index);
        RETURN(rc);
 }
 
-static int out_obj_ref_add(const struct lu_env *env,
-                          struct dt_object *dt_obj,
-                          struct thandle *th)
+static int out_xattr_del(struct tgt_session_info *tsi)
 {
-       int rc;
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_ref_add(env, dt_obj, th);
-       dt_write_unlock(env, dt_obj);
-
-       return rc;
-}
-
-static int out_obj_ref_del(const struct lu_env *env,
-                          struct dt_object *dt_obj,
-                          struct thandle *th)
-{
-       int rc;
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_ref_del(env, dt_obj, th);
-       dt_write_unlock(env, dt_obj);
-
-       return rc;
-}
-
-static int out_tx_ref_add_exec(const struct lu_env *env, struct thandle *th,
-                              struct tx_arg *arg)
-{
-       struct dt_object *dt_obj = arg->object;
-       int rc;
-
-       rc = out_obj_ref_add(env, dt_obj, th);
-
-       CDEBUG(D_INFO, "%s: insert ref_add reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-       return rc;
-}
+       struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
+       struct object_update    *update = tti->tti_u.update.tti_update;
+       struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
+       char                    *name;
+       int                      rc;
+       ENTRY;
 
-static int out_tx_ref_add_undo(const struct lu_env *env, struct thandle *th,
-                              struct tx_arg *arg)
-{
-       return out_obj_ref_del(env, arg->object, th);
-}
+       name = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(name)) {
+               CERROR("%s: empty name for xattr set: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(name));
+               RETURN(PTR_ERR(name));
+       }
 
-static int __out_tx_ref_add(const struct lu_env *env,
-                           struct dt_object *dt_obj,
-                           struct thandle_exec_args *ta,
-                           struct update_reply *reply,
-                           int index, char *file, int line)
-{
-       struct tx_arg   *arg;
-
-       LASSERT(ta->ta_handle != NULL);
-       ta->ta_err = dt_declare_ref_add(env, dt_obj, ta->ta_handle);
-       if (ta->ta_err != 0)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_ref_add_exec, out_tx_ref_add_undo, file,
-                         line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->reply = reply;
-       arg->index = index;
-       return 0;
+       rc = out_tx_xattr_del(tsi->tsi_env, obj, name, &tti->tti_tea,
+                             tti->tti_tea.ta_handle,
+                             tti->tti_u.update.tti_update_reply,
+                             tti->tti_u.update.tti_update_reply_index);
+       RETURN(rc);
 }
 
 /**
@@ -780,56 +490,12 @@ static int out_ref_add(struct tgt_session_info *tsi)
        ENTRY;
 
        rc = out_tx_ref_add(tsi->tsi_env, obj, &tti->tti_tea,
+                           tti->tti_tea.ta_handle,
                            tti->tti_u.update.tti_update_reply,
                            tti->tti_u.update.tti_update_reply_index);
        RETURN(rc);
 }
 
-static int out_tx_ref_del_exec(const struct lu_env *env, struct thandle *th,
-                              struct tx_arg *arg)
-{
-       struct dt_object        *dt_obj = arg->object;
-       int                      rc;
-
-       rc = out_obj_ref_del(env, dt_obj, th);
-
-       CDEBUG(D_INFO, "%s: insert ref_del reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, 0);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-
-       return rc;
-}
-
-static int out_tx_ref_del_undo(const struct lu_env *env, struct thandle *th,
-                              struct tx_arg *arg)
-{
-       return out_obj_ref_add(env, arg->object, th);
-}
-
-static int __out_tx_ref_del(const struct lu_env *env,
-                           struct dt_object *dt_obj,
-                           struct thandle_exec_args *ta,
-                           struct update_reply *reply,
-                           int index, char *file, int line)
-{
-       struct tx_arg   *arg;
-
-       LASSERT(ta->ta_handle != NULL);
-       ta->ta_err = dt_declare_ref_del(env, dt_obj, ta->ta_handle);
-       if (ta->ta_err != 0)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_ref_del_exec, out_tx_ref_del_undo, file,
-                         line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->reply = reply;
-       arg->index = index;
-       return 0;
-}
-
 static int out_ref_del(struct tgt_session_info *tsi)
 {
        struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
@@ -842,217 +508,78 @@ static int out_ref_del(struct tgt_session_info *tsi)
                RETURN(-ENOENT);
 
        rc = out_tx_ref_del(tsi->tsi_env, obj, &tti->tti_tea,
+                           tti->tti_tea.ta_handle,
                            tti->tti_u.update.tti_update_reply,
                            tti->tti_u.update.tti_update_reply_index);
        RETURN(rc);
 }
 
-static int out_obj_index_insert(const struct lu_env *env,
-                               struct dt_object *dt_obj,
-                               const struct dt_rec *rec,
-                               const struct dt_key *key,
-                               struct thandle *th)
-{
-       int rc;
-
-       CDEBUG(D_INFO, "%s: index insert "DFID" name: %s fid "DFID"\n",
-              dt_obd_name(th->th_dev), PFID(lu_object_fid(&dt_obj->do_lu)),
-              (char *)key, PFID((struct lu_fid *)rec));
-
-       if (dt_try_as_dir(env, dt_obj) == 0)
-               return -ENOTDIR;
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_insert(env, dt_obj, rec, key, th, NULL, 0);
-       dt_write_unlock(env, dt_obj);
-
-       return rc;
-}
-
-static int out_obj_index_delete(const struct lu_env *env,
-                               struct dt_object *dt_obj,
-                               const struct dt_key *key,
-                               struct thandle *th)
-{
-       int rc;
-
-       CDEBUG(D_INFO, "%s: index delete "DFID" name: %s\n",
-              dt_obd_name(th->th_dev), PFID(lu_object_fid(&dt_obj->do_lu)),
-              (char *)key);
-
-       if (dt_try_as_dir(env, dt_obj) == 0)
-               return -ENOTDIR;
-
-       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
-       rc = dt_delete(env, dt_obj, key, th, NULL);
-       dt_write_unlock(env, dt_obj);
-
-       return rc;
-}
-
-static int out_tx_index_insert_exec(const struct lu_env *env,
-                                   struct thandle *th, struct tx_arg *arg)
-{
-       struct dt_object *dt_obj = arg->object;
-       int rc;
-
-       rc = out_obj_index_insert(env, dt_obj, arg->u.insert.rec,
-                                 arg->u.insert.key, th);
-
-       CDEBUG(D_INFO, "%s: insert idx insert reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-
-       return rc;
-}
-
-static int out_tx_index_insert_undo(const struct lu_env *env,
-                                   struct thandle *th, struct tx_arg *arg)
-{
-       return out_obj_index_delete(env, arg->object, arg->u.insert.key, th);
-}
-
-static int __out_tx_index_insert(const struct lu_env *env,
-                                struct dt_object *dt_obj,
-                                char *name, struct lu_fid *fid,
-                                struct thandle_exec_args *ta,
-                                struct update_reply *reply,
-                                int index, char *file, int line)
-{
-       struct tx_arg *arg;
-
-       LASSERT(ta->ta_handle != NULL);
-
-       if (lu_object_exists(&dt_obj->do_lu)) {
-               if (dt_try_as_dir(env, dt_obj) == 0) {
-                       ta->ta_err = -ENOTDIR;
-                       return ta->ta_err;
-               }
-               ta->ta_err = dt_declare_insert(env, dt_obj,
-                                              (struct dt_rec *)fid,
-                                              (struct dt_key *)name,
-                                              ta->ta_handle);
-       }
-
-       if (ta->ta_err != 0)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_index_insert_exec,
-                         out_tx_index_insert_undo, file,
-                         line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->reply = reply;
-       arg->index = index;
-       arg->u.insert.rec = (struct dt_rec *)fid;
-       arg->u.insert.key = (struct dt_key *)name;
-
-       return 0;
-}
-
 static int out_index_insert(struct tgt_session_info *tsi)
 {
-       struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
-       struct update     *update = tti->tti_u.update.tti_update;
-       struct dt_object  *obj = tti->tti_u.update.tti_dt_object;
-       struct lu_fid     *fid;
-       char              *name;
-       int                rc = 0;
-       int                size;
-
+       struct tgt_thread_info  *tti    = tgt_th_info(tsi->tsi_env);
+       struct object_update    *update = tti->tti_u.update.tti_update;
+       struct dt_object        *obj    = tti->tti_u.update.tti_dt_object;
+       struct dt_insert_rec    *rec    = &tti->tti_rec;
+       struct lu_fid           *fid;
+       char                    *name;
+       __u32                   *ptype;
+       int                      rc     = 0;
+       size_t                   size;
        ENTRY;
 
-       name = (char *)update_param_buf(update, 0, NULL);
-       if (name == NULL) {
-               CERROR("%s: empty name for index insert: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       name = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(name)) {
+               CERROR("%s: empty name for index insert: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(name));
+               RETURN(PTR_ERR(name));
        }
 
-       fid = (struct lu_fid *)update_param_buf(update, 1, &size);
-       if (fid == NULL || size != sizeof(*fid)) {
-               CERROR("%s: invalid fid: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-                      RETURN(err_serious(-EPROTO));
+       fid = object_update_param_get(update, 1, &size);
+       if (IS_ERR(fid) || size != sizeof(*fid)) {
+               CERROR("%s: invalid fid: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(fid));
+               RETURN(PTR_ERR(fid));
        }
 
-       fid_le_to_cpu(fid, fid);
+       if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+               lustre_swab_lu_fid(fid);
+
        if (!fid_is_sane(fid)) {
                CERROR("%s: invalid FID "DFID": rc = %d\n",
                       tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+               RETURN(-EPROTO);
        }
 
-       rc = out_tx_index_insert(tsi->tsi_env, obj, name, fid,
-                                &tti->tti_tea,
-                                tti->tti_u.update.tti_update_reply,
-                                tti->tti_u.update.tti_update_reply_index);
-       RETURN(rc);
-}
-
-static int out_tx_index_delete_exec(const struct lu_env *env,
-                                   struct thandle *th,
-                                   struct tx_arg *arg)
-{
-       int rc;
-
-       rc = out_obj_index_delete(env, arg->object, arg->u.insert.key, th);
-
-       CDEBUG(D_INFO, "%s: insert idx insert reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
+       ptype = object_update_param_get(update, 2, &size);
+       if (IS_ERR(ptype) || size != sizeof(*ptype)) {
+               CERROR("%s: invalid type for index insert: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(ptype));
+               RETURN(PTR_ERR(ptype));
+       }
 
-       return rc;
-}
+       if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+               __swab32s(ptype);
 
-static int out_tx_index_delete_undo(const struct lu_env *env,
-                                   struct thandle *th,
-                                   struct tx_arg *arg)
-{
-       CERROR("%s: Oops, can not rollback index_delete yet: rc = %d\n",
-              dt_obd_name(th->th_dev), -ENOTSUPP);
-       return -ENOTSUPP;
-}
+       rec->rec_fid = fid;
+       rec->rec_type = *ptype;
 
-static int __out_tx_index_delete(const struct lu_env *env,
-                                struct dt_object *dt_obj, char *name,
-                                struct thandle_exec_args *ta,
-                                struct update_reply *reply,
-                                int index, char *file, int line)
-{
-       struct tx_arg *arg;
+       rc = out_tx_index_insert(tsi->tsi_env, obj, (const struct dt_rec *)rec,
+                                (const struct dt_key *)name, &tti->tti_tea,
+                                tti->tti_tea.ta_handle,
+                                tti->tti_u.update.tti_update_reply,
+                                tti->tti_u.update.tti_update_reply_index);
 
-       if (dt_try_as_dir(env, dt_obj) == 0) {
-               ta->ta_err = -ENOTDIR;
-               return ta->ta_err;
-       }
+       CDEBUG(D_INFO, "%s: "DFID" index insert %s: rc = %d\n",
+              tgt_name(tsi->tsi_tgt), PFID(lu_object_fid(&obj->do_lu)),
+              name, rc);
 
-       LASSERT(ta->ta_handle != NULL);
-       ta->ta_err = dt_declare_delete(env, dt_obj,
-                                      (struct dt_key *)name,
-                                      ta->ta_handle);
-       if (ta->ta_err != 0)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_index_delete_exec,
-                         out_tx_index_delete_undo, file,
-                         line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->reply = reply;
-       arg->index = index;
-       arg->u.insert.key = (struct dt_key *)name;
-       return 0;
+       RETURN(rc);
 }
 
 static int out_index_delete(struct tgt_session_info *tsi)
 {
        struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
-       struct update           *update = tti->tti_u.update.tti_update;
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
        char                    *name;
        int                      rc = 0;
@@ -1060,94 +587,198 @@ static int out_index_delete(struct tgt_session_info *tsi)
        if (!lu_object_exists(&obj->do_lu))
                RETURN(-ENOENT);
 
-       name = (char *)update_param_buf(update, 0, NULL);
-       if (name == NULL) {
-               CERROR("%s: empty name for index delete: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+       name = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(name)) {
+               CERROR("%s: empty name for index delete: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(name));
+               RETURN(PTR_ERR(name));
        }
 
-       rc = out_tx_index_delete(tsi->tsi_env, obj, name, &tti->tti_tea,
+       rc = out_tx_index_delete(tsi->tsi_env, obj, (const struct dt_key *)name,
+                                &tti->tti_tea, tti->tti_tea.ta_handle,
                                 tti->tti_u.update.tti_update_reply,
                                 tti->tti_u.update.tti_update_reply_index);
        RETURN(rc);
 }
 
-static int out_tx_destroy_exec(const struct lu_env *env, struct thandle *th,
-                              struct tx_arg *arg)
-{
-       struct dt_object *dt_obj = arg->object;
-       int rc;
-
-       rc = out_obj_destroy(env, dt_obj, th);
-
-       CDEBUG(D_INFO, "%s: insert destroy reply %p index %d: rc = %d\n",
-              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
-
-       update_insert_reply(arg->reply, NULL, 0, arg->index, rc);
-
-       RETURN(rc);
-}
-
-static int out_tx_destroy_undo(const struct lu_env *env, struct thandle *th,
-                              struct tx_arg *arg)
-{
-       CERROR("%s: not support destroy undo yet!: rc = %d\n",
-              dt_obd_name(th->th_dev), -ENOTSUPP);
-       return -ENOTSUPP;
-}
-
-static int __out_tx_destroy(const struct lu_env *env, struct dt_object *dt_obj,
-                            struct thandle_exec_args *ta,
-                            struct update_reply *reply,
-                            int index, char *file, int line)
-{
-       struct tx_arg *arg;
-
-       LASSERT(ta->ta_handle != NULL);
-       ta->ta_err = dt_declare_destroy(env, dt_obj, ta->ta_handle);
-       if (ta->ta_err)
-               return ta->ta_err;
-
-       arg = tx_add_exec(ta, out_tx_destroy_exec, out_tx_destroy_undo,
-                         file, line);
-       LASSERT(arg);
-       lu_object_get(&dt_obj->do_lu);
-       arg->object = dt_obj;
-       arg->reply = reply;
-       arg->index = index;
-       return 0;
-}
-
 static int out_destroy(struct tgt_session_info *tsi)
 {
        struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
-       struct update           *update = tti->tti_u.update.tti_update;
+       struct object_update    *update = tti->tti_u.update.tti_update;
        struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
        struct lu_fid           *fid;
        int                      rc;
        ENTRY;
 
-       fid = &update->u_fid;
-       fid_le_to_cpu(fid, fid);
+       fid = &update->ou_fid;
        if (!fid_is_sane(fid)) {
                CERROR("%s: invalid FID "DFID": rc = %d\n",
                       tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
-               RETURN(err_serious(-EPROTO));
+               RETURN(-EPROTO);
        }
 
        if (!lu_object_exists(&obj->do_lu))
                RETURN(-ENOENT);
 
        rc = out_tx_destroy(tsi->tsi_env, obj, &tti->tti_tea,
+                           tti->tti_tea.ta_handle,
                            tti->tti_u.update.tti_update_reply,
                            tti->tti_u.update.tti_update_reply_index);
 
        RETURN(rc);
 }
 
+static int out_write(struct tgt_session_info *tsi)
+{
+       struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
+       struct object_update    *update = tti->tti_u.update.tti_update;
+       struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
+       struct lu_buf           *lbuf = &tti->tti_buf;
+       char                    *buf;
+       __u64                   *tmp;
+       size_t                  size = 0;
+       size_t                  buf_len = 0;
+       loff_t                  pos;
+       int                      rc;
+       ENTRY;
+
+       buf = object_update_param_get(update, 0, &buf_len);
+       if (IS_ERR(buf) || buf_len == 0) {
+               CERROR("%s: empty buf for xattr set: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(buf));
+               RETURN(PTR_ERR(buf));
+       }
+       lbuf->lb_buf = buf;
+       lbuf->lb_len = buf_len;
+
+       tmp = object_update_param_get(update, 1, &size);
+       if (IS_ERR(tmp) || size != sizeof(*tmp)) {
+               CERROR("%s: empty or wrong size %zu pos: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
+               RETURN(PTR_ERR(tmp));
+       }
+
+       if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
+               __swab64s(tmp);
+       pos = *tmp;
+
+       rc = out_tx_write(tsi->tsi_env, obj, lbuf, pos,
+                         &tti->tti_tea, tti->tti_tea.ta_handle,
+                         tti->tti_u.update.tti_update_reply,
+                         tti->tti_u.update.tti_update_reply_index);
+       RETURN(rc);
+}
+
+static int out_read(struct tgt_session_info *tsi)
+{
+       const struct lu_env     *env = tsi->tsi_env;
+       struct tgt_thread_info  *tti = tgt_th_info(env);
+       struct object_update    *update = tti->tti_u.update.tti_update;
+       struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
+       struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
+       int index = tti->tti_u.update.tti_update_reply_index;
+       struct lu_rdbuf *rdbuf;
+       struct object_update_result *update_result;
+       struct out_read_reply   *orr;
+       void *tmp;
+       size_t size;
+       size_t total_size = 0;
+       __u64 pos;
+       unsigned int i;
+       unsigned int nbufs;
+       int rc = 0;
+       ENTRY;
+
+       update_result = object_update_result_get(reply, index, NULL);
+       LASSERT(update_result != NULL);
+       update_result->our_datalen = sizeof(*orr);
+
+       if (!lu_object_exists(&obj->do_lu))
+               GOTO(out, rc = -ENOENT);
+
+       tmp = object_update_param_get(update, 0, NULL);
+       if (IS_ERR(tmp)) {
+               CERROR("%s: empty size for read: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
+               GOTO(out, rc = PTR_ERR(tmp));
+       }
+       size = le64_to_cpu(*(size_t *)(tmp));
+
+       tmp = object_update_param_get(update, 1, NULL);
+       if (IS_ERR(tmp)) {
+               CERROR("%s: empty pos for read: rc = %ld\n",
+                      tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
+               GOTO(out, rc = PTR_ERR(tmp));
+       }
+       pos = le64_to_cpu(*(__u64 *)(tmp));
+
+       /* Put the offset into the begining of the buffer in reply */
+       orr = (struct out_read_reply *)update_result->our_data;
+
+       nbufs = (size + OUT_BULK_BUFFER_SIZE - 1) / OUT_BULK_BUFFER_SIZE;
+       OBD_ALLOC(rdbuf, sizeof(struct lu_rdbuf) +
+                        nbufs * sizeof(rdbuf->rb_bufs[0]));
+       if (rdbuf == NULL)
+               GOTO(out, rc = -ENOMEM);
+
+       rdbuf->rb_nbufs = 0;
+       total_size = 0;
+       for (i = 0; i < nbufs; i++) {
+               __u32 read_size;
+
+               read_size = size > OUT_BULK_BUFFER_SIZE ?
+                           OUT_BULK_BUFFER_SIZE : size;
+               OBD_ALLOC(rdbuf->rb_bufs[i].lb_buf, read_size);
+               if (rdbuf->rb_bufs[i].lb_buf == NULL)
+                       GOTO(out_free, rc = -ENOMEM);
+
+               rdbuf->rb_bufs[i].lb_len = read_size;
+               dt_read_lock(env, obj, DT_TGT_CHILD);
+               rc = dt_read(env, obj, &rdbuf->rb_bufs[i], &pos);
+               dt_read_unlock(env, obj);
+
+               total_size += rc < 0 ? 0 : rc;
+               if (rc <= 0)
+                       break;
+
+               rdbuf->rb_nbufs++;
+               size -= read_size;
+       }
+
+       /* send pages to client */
+       rc = tgt_send_buffer(tsi, rdbuf);
+       if (rc < 0)
+               GOTO(out_free, rc);
+
+       orr->orr_size = total_size;
+       orr->orr_offset = pos;
+
+       orr_cpu_to_le(orr, orr);
+       update_result->our_datalen += orr->orr_size;
+out_free:
+       for (i = 0; i < nbufs; i++) {
+               if (rdbuf->rb_bufs[i].lb_buf != NULL) {
+                       OBD_FREE(rdbuf->rb_bufs[i].lb_buf,
+                                rdbuf->rb_bufs[i].lb_len);
+               }
+       }
+       OBD_FREE(rdbuf, sizeof(struct lu_rdbuf) +
+                       nbufs * sizeof(rdbuf->rb_bufs[0]));
+out:
+       /* Insert read buffer */
+       update_result->our_rc = ptlrpc_status_hton(rc);
+       reply->ourp_lens[index] = cfs_size_round(update_result->our_datalen +
+                                                sizeof(*update_result));
+       RETURN(rc);
+}
+
+static int out_noop(struct tgt_session_info *tsi)
+{
+       return 0;
+}
+
 #define DEF_OUT_HNDL(opc, name, flags, fn)     \
-[opc - OBJ_CREATE] = {                                 \
+[opc - OUT_CREATE] = {                                 \
        .th_name    = name,                             \
        .th_fail_id = 0,                                \
        .th_opc     = opc,                              \
@@ -1157,39 +788,45 @@ static int out_destroy(struct tgt_session_info *tsi)
        .th_version = 0,                                \
 }
 
-#define out_handler mdt_handler
 static struct tgt_handler out_update_ops[] = {
-       DEF_OUT_HNDL(OBJ_CREATE, "obj_create", MUTABOR | HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_CREATE, "out_create", IS_MUTABLE | HAS_REPLY,
                     out_create),
-       DEF_OUT_HNDL(OBJ_DESTROY, "obj_create", MUTABOR | HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_DESTROY, "out_create", IS_MUTABLE | HAS_REPLY,
                     out_destroy),
-       DEF_OUT_HNDL(OBJ_REF_ADD, "obj_ref_add", MUTABOR | HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_REF_ADD, "out_ref_add", IS_MUTABLE | HAS_REPLY,
                     out_ref_add),
-       DEF_OUT_HNDL(OBJ_REF_DEL, "obj_ref_del", MUTABOR | HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_REF_DEL, "out_ref_del", IS_MUTABLE | HAS_REPLY,
                     out_ref_del),
-       DEF_OUT_HNDL(OBJ_ATTR_SET, "obj_attr_set",  MUTABOR | HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_ATTR_SET, "out_attr_set",  IS_MUTABLE | HAS_REPLY,
                     out_attr_set),
-       DEF_OUT_HNDL(OBJ_ATTR_GET, "obj_attr_get",  HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_ATTR_GET, "out_attr_get",  HAS_REPLY,
                     out_attr_get),
-       DEF_OUT_HNDL(OBJ_XATTR_SET, "obj_xattr_set", MUTABOR | HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_XATTR_SET, "out_xattr_set", IS_MUTABLE | HAS_REPLY,
                     out_xattr_set),
-       DEF_OUT_HNDL(OBJ_XATTR_GET, "obj_xattr_get", HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_XATTR_DEL, "out_xattr_del", IS_MUTABLE | HAS_REPLY,
+                    out_xattr_del),
+       DEF_OUT_HNDL(OUT_XATTR_GET, "out_xattr_get", HAS_REPLY,
                     out_xattr_get),
-       DEF_OUT_HNDL(OBJ_INDEX_LOOKUP, "obj_index_lookup", HABEO_REFERO,
+       DEF_OUT_HNDL(OUT_INDEX_LOOKUP, "out_index_lookup", HAS_REPLY,
                     out_index_lookup),
-       DEF_OUT_HNDL(OBJ_INDEX_INSERT, "obj_index_insert",
-                    MUTABOR | HABEO_REFERO, out_index_insert),
-       DEF_OUT_HNDL(OBJ_INDEX_DELETE, "obj_index_delete",
-                    MUTABOR | HABEO_REFERO, out_index_delete),
+       DEF_OUT_HNDL(OUT_INDEX_INSERT, "out_index_insert",
+                    IS_MUTABLE | HAS_REPLY, out_index_insert),
+       DEF_OUT_HNDL(OUT_INDEX_DELETE, "out_index_delete",
+                    IS_MUTABLE | HAS_REPLY, out_index_delete),
+       DEF_OUT_HNDL(OUT_WRITE, "out_write", IS_MUTABLE | HAS_REPLY, out_write),
+       DEF_OUT_HNDL(OUT_READ, "out_read", HAS_REPLY, out_read),
+       DEF_OUT_HNDL(OUT_NOOP, "out_noop", HAS_REPLY, out_noop),
+       DEF_OUT_HNDL(OUT_XATTR_LIST, "out_xattr_list", HAS_REPLY,
+                    out_xattr_list),
 };
 
-struct tgt_handler *out_handler_find(__u32 opc)
+static struct tgt_handler *out_handler_find(__u32 opc)
 {
        struct tgt_handler *h;
 
        h = NULL;
-       if (OBJ_CREATE <= opc && opc < OBJ_LAST) {
-               h = &out_update_ops[opc - OBJ_CREATE];
+       if (OUT_CREATE <= opc && opc < OUT_LAST) {
+               h = &out_update_ops[opc - OUT_CREATE];
                LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
                         h->th_opc, opc);
        } else {
@@ -1198,6 +835,114 @@ struct tgt_handler *out_handler_find(__u32 opc)
        return h;
 }
 
+static int out_tx_start(const struct lu_env *env, struct dt_device *dt,
+                       struct thandle_exec_args *ta, struct obd_export *exp)
+{
+       ta->ta_argno = 0;
+       ta->ta_handle = dt_trans_create(env, dt);
+       if (IS_ERR(ta->ta_handle)) {
+               int rc;
+
+               rc = PTR_ERR(ta->ta_handle);
+               ta->ta_handle = NULL;
+               CERROR("%s: start handle error: rc = %d\n", dt_obd_name(dt),
+                      rc);
+               return rc;
+       }
+       if (exp->exp_need_sync)
+               ta->ta_handle->th_sync = 1;
+
+       return 0;
+}
+
+static int out_trans_start(const struct lu_env *env,
+                          struct thandle_exec_args *ta)
+{
+       return dt_trans_start(env, ta->ta_handle->th_dev, ta->ta_handle);
+}
+
+static int out_trans_stop(const struct lu_env *env,
+                         struct thandle_exec_args *ta, int err)
+{
+       int i;
+       int rc;
+
+       ta->ta_handle->th_result = err;
+       rc = dt_trans_stop(env, ta->ta_handle->th_dev, ta->ta_handle);
+       for (i = 0; i < ta->ta_argno; i++) {
+               if (ta->ta_args[i]->object != NULL) {
+                       dt_object_put(env, ta->ta_args[i]->object);
+                       ta->ta_args[i]->object = NULL;
+               }
+       }
+       ta->ta_handle = NULL;
+       ta->ta_argno = 0;
+
+       return rc;
+}
+
+static int out_tx_end(const struct lu_env *env, struct thandle_exec_args *ta,
+                     int declare_ret)
+{
+       struct tgt_session_info *tsi = tgt_ses_info(env);
+       int                     i;
+       int                     rc;
+       int                     rc1;
+       ENTRY;
+
+       if (ta->ta_handle == NULL)
+               RETURN(0);
+
+       if (declare_ret != 0 || ta->ta_argno == 0)
+               GOTO(stop, rc = declare_ret);
+
+       LASSERT(ta->ta_handle->th_dev != NULL);
+       rc = out_trans_start(env, ta);
+       if (unlikely(rc != 0))
+               GOTO(stop, rc);
+
+       for (i = 0; i < ta->ta_argno; i++) {
+               rc = ta->ta_args[i]->exec_fn(env, ta->ta_handle,
+                                            ta->ta_args[i]);
+               if (unlikely(rc != 0)) {
+                       CDEBUG(D_INFO, "error during execution of #%u from"
+                              " %s:%d: rc = %d\n", i, ta->ta_args[i]->file,
+                              ta->ta_args[i]->line, rc);
+                       while (--i >= 0) {
+                               if (ta->ta_args[i]->undo_fn != NULL)
+                                       ta->ta_args[i]->undo_fn(env,
+                                                              ta->ta_handle,
+                                                              ta->ta_args[i]);
+                               else
+                                       CERROR("%s: undo for %s:%d: rc = %d\n",
+                                            dt_obd_name(ta->ta_handle->th_dev),
+                                              ta->ta_args[i]->file,
+                                              ta->ta_args[i]->line, -ENOTSUPP);
+                       }
+                       break;
+               }
+               CDEBUG(D_INFO, "%s: executed %u/%u: rc = %d\n",
+                      dt_obd_name(ta->ta_handle->th_dev), i, ta->ta_argno, rc);
+       }
+
+       /* Only fail for real updates, XXX right now llog updates will be
+       * ignore, whose updates count is usually 1, so failover test
+       * case will spot this FAIL_UPDATE_NET_REP precisely, and it will
+       * be removed after async update patch is landed. */
+       if (ta->ta_argno > 1)
+               tsi->tsi_reply_fail_id = OBD_FAIL_OUT_UPDATE_NET_REP;
+
+stop:
+       rc1 = out_trans_stop(env, ta, rc);
+       if (rc == 0)
+               rc = rc1;
+
+       ta->ta_handle = NULL;
+       ta->ta_argno = 0;
+
+       RETURN(rc);
+}
+
 /**
  * Object updates between Targets. Because all the updates has been
  * dis-assemblied into object updates at sender side, so OUT will
@@ -1216,139 +961,285 @@ int out_handle(struct tgt_session_info *tsi)
        struct thandle_exec_args        *ta = &tti->tti_tea;
        struct req_capsule              *pill = tsi->tsi_pill;
        struct dt_device                *dt = tsi->tsi_tgt->lut_bottom;
-       struct update_buf               *ubuf;
-       struct update                   *update;
-       struct update_reply             *update_reply;
-       int                              bufsize;
-       int                              count;
-       int                              old_batchid = -1;
-       unsigned                         off;
-       int                              i;
-       int                              rc = 0;
-       int                              rc1 = 0;
-
+       struct out_update_header        *ouh;
+       struct out_update_buffer        *oub = NULL;
+       struct object_update            *update;
+       struct object_update_reply      *reply;
+       struct ptlrpc_bulk_desc         *desc = NULL;
+       struct l_wait_info              lwi;
+       void                            **update_bufs;
+       int                             current_batchid = -1;
+       __u32                           update_buf_count;
+       unsigned int                    i;
+       unsigned int                    reply_index = 0;
+       int                             rc = 0;
+       int                             rc1 = 0;
+       int                             ouh_size, reply_size;
+       int                             updates;
        ENTRY;
 
-       req_capsule_set(pill, &RQF_UPDATE_OBJ);
-       bufsize = req_capsule_get_size(pill, &RMF_UPDATE, RCL_CLIENT);
-       if (bufsize != UPDATE_BUFFER_SIZE) {
-               CERROR("%s: invalid bufsize %d: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), bufsize, -EPROTO);
+       req_capsule_set(pill, &RQF_OUT_UPDATE);
+       ouh_size = req_capsule_get_size(pill, &RMF_OUT_UPDATE_HEADER,
+                                       RCL_CLIENT);
+       if (ouh_size <= 0)
                RETURN(err_serious(-EPROTO));
-       }
 
-       ubuf = req_capsule_client_get(pill, &RMF_UPDATE);
-       if (ubuf == NULL) {
-               CERROR("%s: No buf!: rc = %d\n", tgt_name(tsi->tsi_tgt),
-                      -EPROTO);
+       ouh = req_capsule_client_get(pill, &RMF_OUT_UPDATE_HEADER);
+       if (ouh == NULL)
                RETURN(err_serious(-EPROTO));
-       }
 
-       if (le32_to_cpu(ubuf->ub_magic) != UPDATE_BUFFER_MAGIC) {
-               CERROR("%s: invalid magic %x expect %x: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), le32_to_cpu(ubuf->ub_magic),
-                      UPDATE_BUFFER_MAGIC, -EPROTO);
+       if (ouh->ouh_magic != OUT_UPDATE_HEADER_MAGIC) {
+               CERROR("%s: invalid update buffer magic %x expect %x: "
+                      "rc = %d\n", tgt_name(tsi->tsi_tgt), ouh->ouh_magic,
+                      UPDATE_REQUEST_MAGIC, -EPROTO);
                RETURN(err_serious(-EPROTO));
        }
 
-       count = le32_to_cpu(ubuf->ub_count);
-       if (count <= 0) {
-               CERROR("%s: No update!: rc = %d\n",
-                      tgt_name(tsi->tsi_tgt), -EPROTO);
+       update_buf_count = ouh->ouh_count;
+       if (update_buf_count == 0)
                RETURN(err_serious(-EPROTO));
+
+       OBD_ALLOC(update_bufs, sizeof(*update_bufs) * update_buf_count);
+       if (update_bufs == NULL)
+               RETURN(err_serious(-ENOMEM));
+
+       if (ouh->ouh_inline_length > 0) {
+               update_bufs[0] = ouh->ouh_inline_data;
+       } else {
+               struct out_update_buffer *tmp;
+
+               oub = req_capsule_client_get(pill, &RMF_OUT_UPDATE_BUF);
+               if (oub == NULL)
+                       GOTO(out_free, rc = err_serious(-EPROTO));
+
+               desc = ptlrpc_prep_bulk_exp(pill->rc_req, update_buf_count,
+                                           PTLRPC_BULK_OPS_COUNT,
+                                           PTLRPC_BULK_GET_SINK |
+                                           PTLRPC_BULK_BUF_KVEC,
+                                           MDS_BULK_PORTAL,
+                                           &ptlrpc_bulk_kvec_ops);
+               if (desc == NULL)
+                       GOTO(out_free, rc = err_serious(-ENOMEM));
+
+               tmp = oub;
+               for (i = 0; i < update_buf_count; i++, tmp++) {
+                       if (tmp->oub_size >= OUT_MAXREQSIZE)
+                               GOTO(out_free, rc = err_serious(-EPROTO));
+
+                       OBD_ALLOC_LARGE(update_bufs[i], tmp->oub_size);
+                       if (update_bufs[i] == NULL)
+                               GOTO(out_free, rc = err_serious(-ENOMEM));
+
+                       desc->bd_frag_ops->add_iov_frag(desc, update_bufs[i],
+                                                       tmp->oub_size);
+               }
+
+               pill->rc_req->rq_bulk_write = 1;
+               rc = sptlrpc_svc_prep_bulk(pill->rc_req, desc);
+               if (rc != 0)
+                       GOTO(out_free, rc = err_serious(rc));
+
+               rc = target_bulk_io(pill->rc_req->rq_export, desc, &lwi);
+               if (rc < 0)
+                       GOTO(out_free, rc = err_serious(rc));
        }
+       /* validate the request and calculate the total update count and
+        * set it to reply */
+       reply_size = 0;
+       updates = 0;
+       for (i = 0; i < update_buf_count; i++) {
+               struct object_update_request    *our;
+               int                              j;
+
+               our = update_bufs[i];
+               if (ptlrpc_req_need_swab(pill->rc_req))
+                       lustre_swab_object_update_request(our);
+
+               if (our->ourq_magic != UPDATE_REQUEST_MAGIC) {
+                       CERROR("%s: invalid update buffer magic %x"
+                              " expect %x: rc = %d\n",
+                              tgt_name(tsi->tsi_tgt), our->ourq_magic,
+                              UPDATE_REQUEST_MAGIC, -EPROTO);
+                       GOTO(out_free, rc = err_serious(-EPROTO));
+               }
+               updates += our->ourq_count;
+
+               /* need to calculate reply size */
+               for (j = 0; j < our->ourq_count; j++) {
+                       update = object_update_request_get(our, j, NULL);
+                       if (update == NULL)
+                               GOTO(out, rc = err_serious(-EPROTO));
+                       if (ptlrpc_req_need_swab(pill->rc_req))
+                               lustre_swab_object_update(update);
+
+                       if (!fid_is_sane(&update->ou_fid)) {
+                               CERROR("%s: invalid FID "DFID": rc = %d\n",
+                                      tgt_name(tsi->tsi_tgt),
+                                      PFID(&update->ou_fid), -EPROTO);
+                               GOTO(out, rc = err_serious(-EPROTO));
+                       }
 
-       req_capsule_set_size(pill, &RMF_UPDATE_REPLY, RCL_SERVER,
-                            UPDATE_BUFFER_SIZE);
+                       /* XXX: what ou_result_size can be considered safe? */
+
+                       reply_size += sizeof(reply->ourp_lens[0]);
+                       reply_size += sizeof(struct object_update_result);
+                       reply_size += update->ou_result_size;
+               }
+       }
+       reply_size += sizeof(*reply);
+
+       if (unlikely(reply_size > ouh->ouh_reply_size)) {
+               CERROR("%s: too small reply buf %u for %u, need %u at least\n",
+                      tgt_name(tsi->tsi_tgt), ouh->ouh_reply_size,
+                      updates, reply_size);
+               GOTO(out_free, rc = err_serious(-EPROTO));
+       }
+
+       req_capsule_set_size(pill, &RMF_OUT_UPDATE_REPLY, RCL_SERVER,
+                            ouh->ouh_reply_size);
        rc = req_capsule_server_pack(pill);
        if (rc != 0) {
                CERROR("%s: Can't pack response: rc = %d\n",
                       tgt_name(tsi->tsi_tgt), rc);
-               RETURN(rc);
+               GOTO(out_free, rc = err_serious(-EPROTO));
        }
 
        /* Prepare the update reply buffer */
-       update_reply = req_capsule_server_get(pill, &RMF_UPDATE_REPLY);
-       update_init_reply_buf(update_reply, count);
-       tti->tti_u.update.tti_update_reply = update_reply;
-
-       rc = out_tx_start(env, dt, ta);
-       if (rc != 0)
-               RETURN(rc);
-
-       /* Walk through updates in the request to execute them synchronously */
-       off = cfs_size_round(offsetof(struct update_buf, ub_bufs[0]));
-       for (i = 0; i < count; i++) {
+       reply = req_capsule_server_get(pill, &RMF_OUT_UPDATE_REPLY);
+       if (reply == NULL)
+               GOTO(out_free, rc = -EPROTO);
+       reply->ourp_magic = UPDATE_REPLY_MAGIC;
+       reply->ourp_count = updates;
+       tti->tti_u.update.tti_update_reply = reply;
+       tti->tti_mult_trans = !req_is_replay(tgt_ses_req(tsi));
+
+       /* Walk through updates in the request to execute them */
+       for (i = 0; i < update_buf_count; i++) {
                struct tgt_handler      *h;
                struct dt_object        *dt_obj;
+               int                     update_count;
+               struct object_update_request *our;
+               int                     j;
+
+               our = update_bufs[i];
+               update_count = our->ourq_count;
+               for (j = 0; j < update_count; j++) {
+                       struct lu_object_conf conf;
+
+                       update = object_update_request_get(our, j, NULL);
+                       if (update->ou_type == OUT_CREATE)
+                               conf.loc_flags = LOC_F_NEW;
+                       else
+                               conf.loc_flags = 0;
+
+                       dt_obj = dt_locate_at(env, dt, &update->ou_fid,
+                               dt->dd_lu_dev.ld_site->ls_top_dev, &conf);
+                       if (IS_ERR(dt_obj))
+                               GOTO(out, rc = PTR_ERR(dt_obj));
+
+                       if (dt->dd_record_fid_accessed) {
+                               struct lfsck_req_local *lrl = &tti->tti_lrl;
+
+                               lfsck_pack_rfa(lrl,
+                                              lu_object_fid(&dt_obj->do_lu),
+                                              LEL_FID_ACCESSED,
+                                              LFSCK_TYPE_LAYOUT);
+                               tgt_lfsck_in_notify_local(env, dt, lrl, NULL);
+                       }
 
-               update = (struct update *)((char *)ubuf + off);
-               if (old_batchid == -1) {
-                       old_batchid = update->u_batchid;
-               } else if (old_batchid != update->u_batchid) {
-                       /* Stop the current update transaction,
-                        * create a new one */
-                       rc = out_tx_end(env, ta);
-                       if (rc != 0)
-                               RETURN(rc);
-
-                       rc = out_tx_start(env, dt, ta);
-                       if (rc != 0)
-                               RETURN(rc);
-                       old_batchid = update->u_batchid;
-               }
-
-               fid_le_to_cpu(&update->u_fid, &update->u_fid);
-               if (!fid_is_sane(&update->u_fid)) {
-                       CERROR("%s: invalid FID "DFID": rc = %d\n",
-                              tgt_name(tsi->tsi_tgt), PFID(&update->u_fid),
-                              -EPROTO);
-                       GOTO(out, rc = err_serious(-EPROTO));
-               }
-
-               dt_obj = dt_locate(env, dt, &update->u_fid);
-               if (IS_ERR(dt_obj))
-                       GOTO(out, rc = PTR_ERR(dt_obj));
+                       tti->tti_u.update.tti_dt_object = dt_obj;
+                       tti->tti_u.update.tti_update = update;
+                       tti->tti_u.update.tti_update_reply_index = reply_index;
 
-               tti->tti_u.update.tti_dt_object = dt_obj;
-               tti->tti_u.update.tti_update = update;
-               tti->tti_u.update.tti_update_reply_index = i;
+                       h = out_handler_find(update->ou_type);
+                       if (unlikely(h == NULL)) {
+                               CERROR("%s: unsupported opc: 0x%x\n",
+                                      tgt_name(tsi->tsi_tgt), update->ou_type);
+                               GOTO(next, rc = -ENOTSUPP);
+                       }
 
-               h = out_handler_find(update->u_type);
-               if (likely(h != NULL)) {
-                       /* For real modification RPC, check if the update
-                        * has been executed */
-                       if (h->th_flags & MUTABOR) {
+                       /* Check resend case only for modifying RPC */
+                       if (h->th_flags & IS_MUTABLE) {
                                struct ptlrpc_request *req = tgt_ses_req(tsi);
 
                                if (out_check_resent(env, dt, dt_obj, req,
-                                                    out_reconstruct,
-                                                    update_reply, i))
+                                                    out_reconstruct, reply,
+                                                    reply_index))
+                                       GOTO(next, rc = 0);
+
+                               if (dt->dd_rdonly)
+                                       GOTO(next, rc = -EROFS);
+                       }
+
+                       /* start transaction for modification RPC only */
+                       if (h->th_flags & IS_MUTABLE && current_batchid == -1) {
+                               current_batchid = update->ou_batchid;
+                               rc = out_tx_start(env, dt, ta, tsi->tsi_exp);
+                               if (rc != 0)
+                                       GOTO(next, rc);
+
+                               if (update->ou_flags & UPDATE_FL_SYNC)
+                                       ta->ta_handle->th_sync = 1;
+                       }
+
+                       /* Stop the current update transaction, if the update
+                        * has different batchid, or read-only update */
+                       if (((current_batchid != update->ou_batchid) ||
+                            !(h->th_flags & IS_MUTABLE)) &&
+                            ta->ta_handle != NULL) {
+                               rc = out_tx_end(env, ta, rc);
+                               current_batchid = -1;
+                               if (rc != 0)
                                        GOTO(next, rc);
+
+                               /* start a new transaction if needed */
+                               if (h->th_flags & IS_MUTABLE) {
+                                       rc = out_tx_start(env, dt, ta,
+                                                         tsi->tsi_exp);
+                                       if (rc != 0)
+                                               GOTO(next, rc);
+                                       if (update->ou_flags & UPDATE_FL_SYNC)
+                                               ta->ta_handle->th_sync = 1;
+                                       current_batchid = update->ou_batchid;
+                               }
                        }
 
                        rc = h->th_act(tsi);
-               } else {
-                       CERROR("%s: The unsupported opc: 0x%x\n",
-                              tgt_name(tsi->tsi_tgt), update->u_type);
-                       lu_object_put(env, &dt_obj->do_lu);
-                       GOTO(out, rc = -ENOTSUPP);
-               }
 next:
-               lu_object_put(env, &dt_obj->do_lu);
-               if (rc < 0)
-                       GOTO(out, rc);
-               off += cfs_size_round(update_size(update));
+                       reply_index++;
+                       dt_object_put(env, dt_obj);
+                       if (rc < 0)
+                               GOTO(out, rc);
+               }
        }
 out:
-       rc1 = out_tx_end(env, ta);
-       if (rc == 0)
-               rc = rc1;
+       if (current_batchid != -1) {
+               rc1 = out_tx_end(env, ta, rc);
+               if (rc == 0)
+                       rc = rc1;
+       }
+
+out_free:
+       if (update_bufs != NULL) {
+               if (oub != NULL) {
+                       for (i = 0; i < update_buf_count; i++, oub++) {
+                               if (update_bufs[i] != NULL)
+                                       OBD_FREE_LARGE(update_bufs[i],
+                                                      oub->oub_size);
+                       }
+               }
+
+               OBD_FREE(update_bufs, sizeof(*update_bufs) * update_buf_count);
+       }
+
+       if (desc != NULL)
+               ptlrpc_free_bulk(desc);
+
        RETURN(rc);
 }
 
 struct tgt_handler tgt_out_handlers[] = {
-TGT_UPDATE_HDL(MUTABOR,        UPDATE_OBJ,     out_handle),
+TGT_UPDATE_HDL(IS_MUTABLE,     OUT_UPDATE,     out_handle),
 };
 EXPORT_SYMBOL(tgt_out_handlers);