lustre/target/out_handler.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2013, 2017, Intel Corporation.
  24  *
  25  * lustre/target/out_handler.c
  26  *
  27  * Object update handler between targets.
  28  *
  29  * Author: di.wang <di.wang@intel.com>
  30  */
  31
  32 #define DEBUG_SUBSYSTEM S_CLASS
  33
  34 #include <llog_swab.h>
  35 #include <lustre_obdo.h>
  36 #include <lustre_swab.h>
  37 #include <lustre_update.h>
  38 #include <md_object.h>
  39 #include <obd_class.h>
  40 #include "tgt_internal.h"
  41
  42 static inline void orr_cpu_to_le(struct out_read_reply *orr_dst,
  43                                  const struct out_read_reply *orr_src)
  44 {
  45         orr_dst->orr_size = cpu_to_le32(orr_src->orr_size);
  46         orr_dst->orr_padding = cpu_to_le32(orr_src->orr_padding);
  47         orr_dst->orr_offset = cpu_to_le64(orr_dst->orr_offset);
  48 }
  49
  50 static void out_reconstruct(const struct lu_env *env, struct dt_device *dt,
  51                             struct dt_object *obj,
  52                             struct object_update_reply *reply,
  53                             int index)
  54 {
  55         CDEBUG(D_INFO, "%s: fork reply reply %p index %d: rc = %d\n",
  56                dt_obd_name(dt), reply, index, 0);
  57
  58         object_update_result_insert(reply, NULL, 0, index, 0);
  59         return;
  60 }
  61
  62 typedef void (*out_reconstruct_t)(const struct lu_env *env,
  63                                   struct dt_device *dt,
  64                                   struct dt_object *obj,
  65                                   struct object_update_reply *reply,
  66                                   int index);
  67
  68 static inline int out_check_resent(const struct lu_env *env,
  69                                    struct dt_device *dt,
  70                                    struct dt_object *obj,
  71                                    struct ptlrpc_request *req,
  72                                    out_reconstruct_t reconstruct,
  73                                    struct object_update_reply *reply,
  74                                    int index)
  75 {
  76         if (likely(!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT)))
  77                 return 0;
  78
  79         if (req_xid_is_last(req)) {
  80                 struct lsd_client_data *lcd;
  81
  82                 /* XXX this does not support mulitple transactions yet, i.e.
  83                  * only 1 update RPC each time betwee MDTs */
  84                 lcd = req->rq_export->exp_target_data.ted_lcd;
  85
  86                 req->rq_transno = lcd->lcd_last_transno;
  87                 req->rq_status = lcd->lcd_last_result;
  88                 if (req->rq_status != 0)
  89                         req->rq_transno = 0;
  90                 lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
  91                 lustre_msg_set_status(req->rq_repmsg, req->rq_status);
  92
  93                 DEBUG_REQ(D_RPCTRACE, req, "restoring resent RPC");
  94
  95                 reconstruct(env, dt, obj, reply, index);
  96                 return 1;
  97         }
  98         DEBUG_REQ(D_HA, req, "no reply for RESENT req (have %lld)",
  99                  req->rq_export->exp_target_data.ted_lcd->lcd_last_xid);
 100         return 0;
 101 }
 102
 103 static int out_create(struct tgt_session_info *tsi)
 104 {
 105         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 106         struct object_update    *update = tti->tti_u.update.tti_update;
 107         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 108         struct dt_object_format *dof = &tti->tti_u.update.tti_update_dof;
 109         struct obdo             *lobdo = &tti->tti_u.update.tti_obdo;
 110         struct lu_attr          *attr = &tti->tti_attr;
 111         struct lu_fid           *fid = NULL;
 112         struct obdo             *wobdo;
 113         size_t                  size;
 114         int                     rc;
 115
 116         ENTRY;
 117
 118         wobdo = object_update_param_get(update, 0, &size);
 119         if (IS_ERR(wobdo) || size != sizeof(*wobdo)) {
 120                 CERROR("%s: obdo is NULL, invalid RPC: rc = %ld\n",
 121                        tgt_name(tsi->tsi_tgt), PTR_ERR(wobdo));
 122                 RETURN(PTR_ERR(wobdo));
 123         }
 124
 125         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 126                 lustre_swab_obdo(wobdo);
 127         lustre_get_wire_obdo(NULL, lobdo, wobdo);
 128         la_from_obdo(attr, lobdo, lobdo->o_valid);
 129
 130         dof->dof_type = dt_mode_to_dft(attr->la_mode);
 131         if (update->ou_params_count > 1) {
 132                 fid = object_update_param_get(update, 1, &size);
 133                 if (IS_ERR(fid) || size != sizeof(*fid)) {
 134                         CERROR("%s: invalid fid: rc = %ld\n",
 135                                tgt_name(tsi->tsi_tgt), PTR_ERR(fid));
 136                         RETURN(PTR_ERR(fid));
 137                 }
 138                 if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 139                         lustre_swab_lu_fid(fid);
 140                 if (!fid_is_sane(fid)) {
 141                         CERROR("%s: invalid fid "DFID": rc = %d\n",
 142                                tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 143                         RETURN(-EPROTO);
 144                 }
 145         }
 146
 147         if (lu_object_exists(&obj->do_lu))
 148                 RETURN(-EEXIST);
 149
 150         rc = out_tx_create(tsi->tsi_env, obj, attr, fid, dof,
 151                            &tti->tti_tea, tti->tti_tea.ta_handle,
 152                            tti->tti_u.update.tti_update_reply,
 153                            tti->tti_u.update.tti_update_reply_index);
 154
 155         RETURN(rc);
 156 }
 157
 158 static int out_attr_set(struct tgt_session_info *tsi)
 159 {
 160         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 161         struct object_update    *update = tti->tti_u.update.tti_update;
 162         struct lu_attr          *attr = &tti->tti_attr;
 163         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 164         struct obdo             *lobdo = &tti->tti_u.update.tti_obdo;
 165         struct obdo             *wobdo;
 166         size_t                   size;
 167         int                      rc;
 168
 169         ENTRY;
 170
 171         wobdo = object_update_param_get(update, 0, &size);
 172         if (IS_ERR(wobdo) || size != sizeof(*wobdo)) {
 173                 CERROR("%s: empty obdo in the update: rc = %ld\n",
 174                        tgt_name(tsi->tsi_tgt), PTR_ERR(wobdo));
 175                 RETURN(PTR_ERR(wobdo));
 176         }
 177
 178         attr->la_valid = 0;
 179         attr->la_valid = 0;
 180
 181         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 182                 lustre_swab_obdo(wobdo);
 183         lustre_get_wire_obdo(NULL, lobdo, wobdo);
 184         la_from_obdo(attr, lobdo, lobdo->o_valid);
 185
 186         rc = out_tx_attr_set(tsi->tsi_env, obj, attr, &tti->tti_tea,
 187                              tti->tti_tea.ta_handle,
 188                              tti->tti_u.update.tti_update_reply,
 189                              tti->tti_u.update.tti_update_reply_index);
 190
 191         RETURN(rc);
 192 }
 193
 194 static int out_attr_get(struct tgt_session_info *tsi)
 195 {
 196         const struct lu_env     *env = tsi->tsi_env;
 197         struct tgt_thread_info  *tti = tgt_th_info(env);
 198         struct object_update    *update = tti->tti_u.update.tti_update;
 199         struct obdo             *obdo = &tti->tti_u.update.tti_obdo;
 200         struct lu_attr          *la = &tti->tti_attr;
 201         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 202         int                     idx = tti->tti_u.update.tti_update_reply_index;
 203         int                     rc;
 204
 205         ENTRY;
 206
 207         if (unlikely(update->ou_result_size < sizeof(*obdo)))
 208                 return -EPROTO;
 209
 210         if (!lu_object_exists(&obj->do_lu)) {
 211                 /* Usually, this will be called when the master MDT try
 212                  * to init a remote object(see osp_object_init), so if
 213                  * the object does not exist on slave, we need set BANSHEE flag,
 214                  * so the object can be removed from the cache immediately */
 215                 set_bit(LU_OBJECT_HEARD_BANSHEE,
 216                         &obj->do_lu.lo_header->loh_flags);
 217                 RETURN(-ENOENT);
 218         }
 219
 220         dt_read_lock(env, obj, MOR_TGT_CHILD);
 221         rc = dt_attr_get(env, obj, la);
 222         if (rc)
 223                 GOTO(out_unlock, rc);
 224
 225         obdo->o_valid = 0;
 226         obdo_from_la(obdo, la, la->la_valid);
 227
 228 out_unlock:
 229         dt_read_unlock(env, obj);
 230
 231         CDEBUG(D_INFO, "%s: insert attr get reply %p index %d: rc = %d\n",
 232                tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
 233                0, rc);
 234
 235         object_update_result_insert(tti->tti_u.update.tti_update_reply, obdo,
 236                                     sizeof(*obdo), idx, rc);
 237
 238         RETURN(rc);
 239 }
 240
 241 static int out_xattr_get(struct tgt_session_info *tsi)
 242 {
 243         const struct lu_env        *env = tsi->tsi_env;
 244         struct tgt_thread_info     *tti = tgt_th_info(env);
 245         struct object_update       *update = tti->tti_u.update.tti_update;
 246         struct lu_buf              *lbuf = &tti->tti_buf;
 247         struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
 248         struct dt_object           *obj = tti->tti_u.update.tti_dt_object;
 249         char                       *name;
 250         struct object_update_result *update_result;
 251         int                     idx = tti->tti_u.update.tti_update_reply_index;
 252         int                        rc;
 253
 254         ENTRY;
 255
 256         if (!lu_object_exists(&obj->do_lu)) {
 257                 set_bit(LU_OBJECT_HEARD_BANSHEE,
 258                         &obj->do_lu.lo_header->loh_flags);
 259                 RETURN(-ENOENT);
 260         }
 261
 262         name = object_update_param_get(update, 0, NULL);
 263         if (IS_ERR(name)) {
 264                 CERROR("%s: empty name for xattr get: rc = %ld\n",
 265                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 266                 RETURN(PTR_ERR(name));
 267         }
 268
 269         update_result = object_update_result_get(reply, idx, NULL);
 270         if (update_result == NULL) {
 271                 CERROR("%s: empty name for xattr get: rc = %d\n",
 272                        tgt_name(tsi->tsi_tgt), -EPROTO);
 273                 RETURN(-EPROTO);
 274         }
 275
 276         lbuf->lb_len = (int)tti->tti_u.update.tti_update->ou_result_size;
 277         if (lbuf->lb_len == 0)
 278                 lbuf->lb_buf = NULL;
 279         else
 280                 lbuf->lb_buf = update_result->our_data;
 281
 282         dt_read_lock(env, obj, MOR_TGT_CHILD);
 283         rc = dt_xattr_get(env, obj, lbuf, name);
 284         dt_read_unlock(env, obj);
 285         if (rc <= 0) {
 286                 lbuf->lb_len = 0;
 287                 if (unlikely(!rc))
 288                         rc = -ENODATA;
 289         } else if (lbuf->lb_buf) {
 290                 lbuf->lb_len = rc;
 291         }
 292
 293         CDEBUG(D_INFO, "%s: "DFID" get xattr %s len %d: rc = %d\n",
 294                tgt_name(tsi->tsi_tgt), PFID(lu_object_fid(&obj->do_lu)),
 295                name, (int)lbuf->lb_len, rc);
 296
 297         /* Since we directly use update_result->our_data as the lbuf->lb_buf,
 298          * then use NULL for result_insert to avoid unnecessary memory copy. */
 299         object_update_result_insert(reply, NULL, lbuf->lb_len, idx, rc);
 300
 301         RETURN(0);
 302 }
 303
 304 static int out_index_lookup(struct tgt_session_info *tsi)
 305 {
 306         const struct lu_env     *env = tsi->tsi_env;
 307         struct tgt_thread_info  *tti = tgt_th_info(env);
 308         struct object_update    *update = tti->tti_u.update.tti_update;
 309         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 310         char                    *name;
 311         int                      rc;
 312
 313         ENTRY;
 314
 315         if (unlikely(update->ou_result_size < sizeof(tti->tti_fid1)))
 316                 return -EPROTO;
 317
 318         if (!lu_object_exists(&obj->do_lu))
 319                 RETURN(-ENOENT);
 320
 321         name = object_update_param_get(update, 0, NULL);
 322         if (IS_ERR(name)) {
 323                 CERROR("%s: empty name for lookup: rc = %ld\n",
 324                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 325                 RETURN(PTR_ERR(name));
 326         }
 327
 328         dt_read_lock(env, obj, MOR_TGT_CHILD);
 329         if (!dt_try_as_dir(env, obj))
 330                 GOTO(out_unlock, rc = -ENOTDIR);
 331
 332         rc = dt_lookup(env, obj, (struct dt_rec *)&tti->tti_fid1,
 333                        (struct dt_key *)name);
 334
 335         if (rc < 0)
 336                 GOTO(out_unlock, rc);
 337
 338         if (rc == 0)
 339                 rc += 1;
 340
 341 out_unlock:
 342         dt_read_unlock(env, obj);
 343
 344         CDEBUG(D_INFO, "lookup "DFID" %s get "DFID" rc %d\n",
 345                PFID(lu_object_fid(&obj->do_lu)), name,
 346                PFID(&tti->tti_fid1), rc);
 347
 348         CDEBUG(D_INFO, "%s: insert lookup reply %p index %d: rc = %d\n",
 349                tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
 350                0, rc);
 351
 352         object_update_result_insert(tti->tti_u.update.tti_update_reply,
 353                             &tti->tti_fid1, sizeof(tti->tti_fid1),
 354                             tti->tti_u.update.tti_update_reply_index, rc);
 355         RETURN(rc);
 356 }
 357
 358 static int out_xattr_set(struct tgt_session_info *tsi)
 359 {
 360         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 361         struct object_update    *update = tti->tti_u.update.tti_update;
 362         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 363         struct lu_buf           *lbuf = &tti->tti_buf;
 364         char                    *name;
 365         char                    *buf;
 366         __u32                   *tmp;
 367         size_t                   buf_len = 0;
 368         int                      flag;
 369         size_t                   size = 0;
 370         int                      rc;
 371         ENTRY;
 372
 373         name = object_update_param_get(update, 0, NULL);
 374         if (IS_ERR(name)) {
 375                 CERROR("%s: empty name for xattr set: rc = %ld\n",
 376                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 377                 RETURN(PTR_ERR(name));
 378         }
 379
 380         /* If buffer == NULL (-ENODATA), then it might mean delete xattr */
 381         buf = object_update_param_get(update, 1, &buf_len);
 382         if (IS_ERR(buf) && PTR_ERR(buf) != -ENODATA)
 383                 RETURN(PTR_ERR(buf));
 384
 385         lbuf->lb_buf = buf;
 386         lbuf->lb_len = buf_len;
 387
 388         tmp = object_update_param_get(update, 2, &size);
 389         if (IS_ERR(tmp) || size != sizeof(*tmp)) {
 390                 CERROR("%s: emptry or wrong size %zu flag: rc = %ld\n",
 391                        tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
 392                 RETURN(PTR_ERR(tmp));
 393         }
 394
 395         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 396                 __swab32s(tmp);
 397         flag = *tmp;
 398
 399         rc = out_tx_xattr_set(tsi->tsi_env, obj, lbuf, name, flag,
 400                               &tti->tti_tea, tti->tti_tea.ta_handle,
 401                               tti->tti_u.update.tti_update_reply,
 402                               tti->tti_u.update.tti_update_reply_index);
 403         RETURN(rc);
 404 }
 405
 406 static int out_xattr_del(struct tgt_session_info *tsi)
 407 {
 408         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 409         struct object_update    *update = tti->tti_u.update.tti_update;
 410         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 411         char                    *name;
 412         int                      rc;
 413         ENTRY;
 414
 415         name = object_update_param_get(update, 0, NULL);
 416         if (IS_ERR(name)) {
 417                 CERROR("%s: empty name for xattr set: rc = %ld\n",
 418                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 419                 RETURN(PTR_ERR(name));
 420         }
 421
 422         rc = out_tx_xattr_del(tsi->tsi_env, obj, name, &tti->tti_tea,
 423                               tti->tti_tea.ta_handle,
 424                               tti->tti_u.update.tti_update_reply,
 425                               tti->tti_u.update.tti_update_reply_index);
 426         RETURN(rc);
 427 }
 428
 429 /**
 430  * increase ref of the object
 431  **/
 432 static int out_ref_add(struct tgt_session_info *tsi)
 433 {
 434         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 435         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 436         int                      rc;
 437
 438         ENTRY;
 439
 440         rc = out_tx_ref_add(tsi->tsi_env, obj, &tti->tti_tea,
 441                             tti->tti_tea.ta_handle,
 442                             tti->tti_u.update.tti_update_reply,
 443                             tti->tti_u.update.tti_update_reply_index);
 444         RETURN(rc);
 445 }
 446
 447 static int out_ref_del(struct tgt_session_info *tsi)
 448 {
 449         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 450         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 451         int                      rc;
 452
 453         ENTRY;
 454
 455         if (!lu_object_exists(&obj->do_lu))
 456                 RETURN(-ENOENT);
 457
 458         rc = out_tx_ref_del(tsi->tsi_env, obj, &tti->tti_tea,
 459                             tti->tti_tea.ta_handle,
 460                             tti->tti_u.update.tti_update_reply,
 461                             tti->tti_u.update.tti_update_reply_index);
 462         RETURN(rc);
 463 }
 464
 465 static int out_index_insert(struct tgt_session_info *tsi)
 466 {
 467         struct tgt_thread_info  *tti    = tgt_th_info(tsi->tsi_env);
 468         struct object_update    *update = tti->tti_u.update.tti_update;
 469         struct dt_object        *obj    = tti->tti_u.update.tti_dt_object;
 470         struct dt_insert_rec    *rec    = &tti->tti_rec;
 471         struct lu_fid           *fid;
 472         char                    *name;
 473         __u32                   *ptype;
 474         int                      rc     = 0;
 475         size_t                   size;
 476         ENTRY;
 477
 478         name = object_update_param_get(update, 0, NULL);
 479         if (IS_ERR(name)) {
 480                 CERROR("%s: empty name for index insert: rc = %ld\n",
 481                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 482                 RETURN(PTR_ERR(name));
 483         }
 484
 485         fid = object_update_param_get(update, 1, &size);
 486         if (IS_ERR(fid) || size != sizeof(*fid)) {
 487                 CERROR("%s: invalid fid: rc = %ld\n",
 488                        tgt_name(tsi->tsi_tgt), PTR_ERR(fid));
 489                 RETURN(PTR_ERR(fid));
 490         }
 491
 492         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 493                 lustre_swab_lu_fid(fid);
 494
 495         if (!fid_is_sane(fid)) {
 496                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 497                        tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 498                 RETURN(-EPROTO);
 499         }
 500
 501         ptype = object_update_param_get(update, 2, &size);
 502         if (IS_ERR(ptype) || size != sizeof(*ptype)) {
 503                 CERROR("%s: invalid type for index insert: rc = %ld\n",
 504                        tgt_name(tsi->tsi_tgt), PTR_ERR(ptype));
 505                 RETURN(PTR_ERR(ptype));
 506         }
 507
 508         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 509                 __swab32s(ptype);
 510
 511         rec->rec_fid = fid;
 512         rec->rec_type = *ptype;
 513
 514         rc = out_tx_index_insert(tsi->tsi_env, obj, (const struct dt_rec *)rec,
 515                                  (const struct dt_key *)name, &tti->tti_tea,
 516                                  tti->tti_tea.ta_handle,
 517                                  tti->tti_u.update.tti_update_reply,
 518                                  tti->tti_u.update.tti_update_reply_index);
 519         RETURN(rc);
 520 }
 521
 522 static int out_index_delete(struct tgt_session_info *tsi)
 523 {
 524         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 525         struct object_update    *update = tti->tti_u.update.tti_update;
 526         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 527         char                    *name;
 528         int                      rc = 0;
 529
 530         if (!lu_object_exists(&obj->do_lu))
 531                 RETURN(-ENOENT);
 532
 533         name = object_update_param_get(update, 0, NULL);
 534         if (IS_ERR(name)) {
 535                 CERROR("%s: empty name for index delete: rc = %ld\n",
 536                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 537                 RETURN(PTR_ERR(name));
 538         }
 539
 540         rc = out_tx_index_delete(tsi->tsi_env, obj, (const struct dt_key *)name,
 541                                  &tti->tti_tea, tti->tti_tea.ta_handle,
 542                                  tti->tti_u.update.tti_update_reply,
 543                                  tti->tti_u.update.tti_update_reply_index);
 544         RETURN(rc);
 545 }
 546
 547 static int out_destroy(struct tgt_session_info *tsi)
 548 {
 549         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 550         struct object_update    *update = tti->tti_u.update.tti_update;
 551         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 552         struct lu_fid           *fid;
 553         int                      rc;
 554         ENTRY;
 555
 556         fid = &update->ou_fid;
 557         if (!fid_is_sane(fid)) {
 558                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 559                        tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 560                 RETURN(-EPROTO);
 561         }
 562
 563         if (!lu_object_exists(&obj->do_lu))
 564                 RETURN(-ENOENT);
 565
 566         rc = out_tx_destroy(tsi->tsi_env, obj, &tti->tti_tea,
 567                             tti->tti_tea.ta_handle,
 568                             tti->tti_u.update.tti_update_reply,
 569                             tti->tti_u.update.tti_update_reply_index);
 570
 571         RETURN(rc);
 572 }
 573
 574 static int out_write(struct tgt_session_info *tsi)
 575 {
 576         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 577         struct object_update    *update = tti->tti_u.update.tti_update;
 578         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 579         struct lu_buf           *lbuf = &tti->tti_buf;
 580         char                    *buf;
 581         __u64                   *tmp;
 582         size_t                  size = 0;
 583         size_t                  buf_len = 0;
 584         loff_t                  pos;
 585         int                      rc;
 586         ENTRY;
 587
 588         buf = object_update_param_get(update, 0, &buf_len);
 589         if (IS_ERR(buf) || buf_len == 0) {
 590                 CERROR("%s: empty buf for xattr set: rc = %ld\n",
 591                        tgt_name(tsi->tsi_tgt), PTR_ERR(buf));
 592                 RETURN(PTR_ERR(buf));
 593         }
 594         lbuf->lb_buf = buf;
 595         lbuf->lb_len = buf_len;
 596
 597         tmp = object_update_param_get(update, 1, &size);
 598         if (IS_ERR(tmp) || size != sizeof(*tmp)) {
 599                 CERROR("%s: empty or wrong size %zu pos: rc = %ld\n",
 600                        tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
 601                 RETURN(PTR_ERR(tmp));
 602         }
 603
 604         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 605                 __swab64s(tmp);
 606         pos = *tmp;
 607
 608         rc = out_tx_write(tsi->tsi_env, obj, lbuf, pos,
 609                           &tti->tti_tea, tti->tti_tea.ta_handle,
 610                           tti->tti_u.update.tti_update_reply,
 611                           tti->tti_u.update.tti_update_reply_index);
 612         RETURN(rc);
 613 }
 614
 615 static int out_read(struct tgt_session_info *tsi)
 616 {
 617         const struct lu_env     *env = tsi->tsi_env;
 618         struct tgt_thread_info  *tti = tgt_th_info(env);
 619         struct object_update    *update = tti->tti_u.update.tti_update;
 620         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 621         struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
 622         int index = tti->tti_u.update.tti_update_reply_index;
 623         struct lu_rdbuf *rdbuf;
 624         struct object_update_result *update_result;
 625         struct out_read_reply   *orr;
 626         void *tmp;
 627         size_t size;
 628         size_t total_size = 0;
 629         __u64 pos;
 630         unsigned int i;
 631         unsigned int nbufs;
 632         int rc = 0;
 633         ENTRY;
 634
 635         update_result = object_update_result_get(reply, index, NULL);
 636         LASSERT(update_result != NULL);
 637         update_result->our_datalen = sizeof(*orr);
 638
 639         if (!lu_object_exists(&obj->do_lu))
 640                 GOTO(out, rc = -ENOENT);
 641
 642         tmp = object_update_param_get(update, 0, NULL);
 643         if (IS_ERR(tmp)) {
 644                 CERROR("%s: empty size for read: rc = %ld\n",
 645                        tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
 646                 GOTO(out, rc = PTR_ERR(tmp));
 647         }
 648         size = le64_to_cpu(*(size_t *)(tmp));
 649
 650         tmp = object_update_param_get(update, 1, NULL);
 651         if (IS_ERR(tmp)) {
 652                 CERROR("%s: empty pos for read: rc = %ld\n",
 653                        tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
 654                 GOTO(out, rc = PTR_ERR(tmp));
 655         }
 656         pos = le64_to_cpu(*(__u64 *)(tmp));
 657
 658         /* Put the offset into the begining of the buffer in reply */
 659         orr = (struct out_read_reply *)update_result->our_data;
 660
 661         nbufs = (size + OUT_BULK_BUFFER_SIZE - 1) / OUT_BULK_BUFFER_SIZE;
 662         OBD_ALLOC(rdbuf, sizeof(struct lu_rdbuf) +
 663                          nbufs * sizeof(rdbuf->rb_bufs[0]));
 664         if (rdbuf == NULL)
 665                 GOTO(out, rc = -ENOMEM);
 666
 667         rdbuf->rb_nbufs = 0;
 668         total_size = 0;
 669         for (i = 0; i < nbufs; i++) {
 670                 __u32 read_size;
 671
 672                 read_size = size > OUT_BULK_BUFFER_SIZE ?
 673                             OUT_BULK_BUFFER_SIZE : size;
 674                 OBD_ALLOC(rdbuf->rb_bufs[i].lb_buf, read_size);
 675                 if (rdbuf->rb_bufs[i].lb_buf == NULL)
 676                         GOTO(out_free, rc = -ENOMEM);
 677
 678                 rdbuf->rb_bufs[i].lb_len = read_size;
 679                 dt_read_lock(env, obj, MOR_TGT_CHILD);
 680                 rc = dt_read(env, obj, &rdbuf->rb_bufs[i], &pos);
 681                 dt_read_unlock(env, obj);
 682
 683                 total_size += rc < 0 ? 0 : rc;
 684                 if (rc <= 0)
 685                         break;
 686
 687                 rdbuf->rb_nbufs++;
 688                 size -= read_size;
 689         }
 690
 691         /* send pages to client */
 692         rc = tgt_send_buffer(tsi, rdbuf);
 693         if (rc < 0)
 694                 GOTO(out_free, rc);
 695
 696         orr->orr_size = total_size;
 697         orr->orr_offset = pos;
 698
 699         orr_cpu_to_le(orr, orr);
 700         update_result->our_datalen += orr->orr_size;
 701 out_free:
 702         for (i = 0; i < nbufs; i++) {
 703                 if (rdbuf->rb_bufs[i].lb_buf != NULL) {
 704                         OBD_FREE(rdbuf->rb_bufs[i].lb_buf,
 705                                  rdbuf->rb_bufs[i].lb_len);
 706                 }
 707         }
 708         OBD_FREE(rdbuf, sizeof(struct lu_rdbuf) +
 709                         nbufs * sizeof(rdbuf->rb_bufs[0]));
 710 out:
 711         /* Insert read buffer */
 712         update_result->our_rc = ptlrpc_status_hton(rc);
 713         reply->ourp_lens[index] = cfs_size_round(update_result->our_datalen +
 714                                                  sizeof(*update_result));
 715         RETURN(rc);
 716 }
 717
 718 static int out_noop(struct tgt_session_info *tsi)
 719 {
 720         return 0;
 721 }
 722
 723 #define DEF_OUT_HNDL(opc, name, flags, fn)     \
 724 [opc - OUT_CREATE] = {                                  \
 725         .th_name    = name,                             \
 726         .th_fail_id = 0,                                \
 727         .th_opc     = opc,                              \
 728         .th_flags   = flags,                            \
 729         .th_act     = fn,                               \
 730         .th_fmt     = NULL,                             \
 731         .th_version = 0,                                \
 732 }
 733
 734 static struct tgt_handler out_update_ops[] = {
 735         DEF_OUT_HNDL(OUT_CREATE, "out_create", MUTABOR | HABEO_REFERO,
 736                      out_create),
 737         DEF_OUT_HNDL(OUT_DESTROY, "out_create", MUTABOR | HABEO_REFERO,
 738                      out_destroy),
 739         DEF_OUT_HNDL(OUT_REF_ADD, "out_ref_add", MUTABOR | HABEO_REFERO,
 740                      out_ref_add),
 741         DEF_OUT_HNDL(OUT_REF_DEL, "out_ref_del", MUTABOR | HABEO_REFERO,
 742                      out_ref_del),
 743         DEF_OUT_HNDL(OUT_ATTR_SET, "out_attr_set",  MUTABOR | HABEO_REFERO,
 744                      out_attr_set),
 745         DEF_OUT_HNDL(OUT_ATTR_GET, "out_attr_get",  HABEO_REFERO,
 746                      out_attr_get),
 747         DEF_OUT_HNDL(OUT_XATTR_SET, "out_xattr_set", MUTABOR | HABEO_REFERO,
 748                      out_xattr_set),
 749         DEF_OUT_HNDL(OUT_XATTR_DEL, "out_xattr_del", MUTABOR | HABEO_REFERO,
 750                      out_xattr_del),
 751         DEF_OUT_HNDL(OUT_XATTR_GET, "out_xattr_get", HABEO_REFERO,
 752                      out_xattr_get),
 753         DEF_OUT_HNDL(OUT_INDEX_LOOKUP, "out_index_lookup", HABEO_REFERO,
 754                      out_index_lookup),
 755         DEF_OUT_HNDL(OUT_INDEX_INSERT, "out_index_insert",
 756                      MUTABOR | HABEO_REFERO, out_index_insert),
 757         DEF_OUT_HNDL(OUT_INDEX_DELETE, "out_index_delete",
 758                      MUTABOR | HABEO_REFERO, out_index_delete),
 759         DEF_OUT_HNDL(OUT_WRITE, "out_write", MUTABOR | HABEO_REFERO, out_write),
 760         DEF_OUT_HNDL(OUT_READ, "out_read", HABEO_REFERO, out_read),
 761         DEF_OUT_HNDL(OUT_NOOP, "out_noop", HABEO_REFERO, out_noop),
 762 };
 763
 764 static struct tgt_handler *out_handler_find(__u32 opc)
 765 {
 766         struct tgt_handler *h;
 767
 768         h = NULL;
 769         if (OUT_CREATE <= opc && opc < OUT_LAST) {
 770                 h = &out_update_ops[opc - OUT_CREATE];
 771                 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
 772                          h->th_opc, opc);
 773         } else {
 774                 h = NULL; /* unsupported opc */
 775         }
 776         return h;
 777 }
 778
 779 static int out_tx_start(const struct lu_env *env, struct dt_device *dt,
 780                         struct thandle_exec_args *ta, struct obd_export *exp)
 781 {
 782         ta->ta_argno = 0;
 783         ta->ta_handle = dt_trans_create(env, dt);
 784         if (IS_ERR(ta->ta_handle)) {
 785                 int rc;
 786
 787                 rc = PTR_ERR(ta->ta_handle);
 788                 ta->ta_handle = NULL;
 789                 CERROR("%s: start handle error: rc = %d\n", dt_obd_name(dt),
 790                        rc);
 791                 return rc;
 792         }
 793         if (exp->exp_need_sync)
 794                 ta->ta_handle->th_sync = 1;
 795
 796         return 0;
 797 }
 798
 799 static int out_trans_start(const struct lu_env *env,
 800                            struct thandle_exec_args *ta)
 801 {
 802         return dt_trans_start(env, ta->ta_handle->th_dev, ta->ta_handle);
 803 }
 804
 805 static int out_trans_stop(const struct lu_env *env,
 806                           struct thandle_exec_args *ta, int err)
 807 {
 808         int i;
 809         int rc;
 810
 811         ta->ta_handle->th_result = err;
 812         rc = dt_trans_stop(env, ta->ta_handle->th_dev, ta->ta_handle);
 813         for (i = 0; i < ta->ta_argno; i++) {
 814                 if (ta->ta_args[i]->object != NULL) {
 815                         dt_object_put(env, ta->ta_args[i]->object);
 816                         ta->ta_args[i]->object = NULL;
 817                 }
 818         }
 819         ta->ta_handle = NULL;
 820         ta->ta_argno = 0;
 821
 822         return rc;
 823 }
 824
 825 static int out_tx_end(const struct lu_env *env, struct thandle_exec_args *ta,
 826                       int declare_ret)
 827 {
 828         struct tgt_session_info *tsi = tgt_ses_info(env);
 829         int                     i;
 830         int                     rc;
 831         int                     rc1;
 832         ENTRY;
 833
 834         if (ta->ta_handle == NULL)
 835                 RETURN(0);
 836
 837         if (declare_ret != 0 || ta->ta_argno == 0)
 838                 GOTO(stop, rc = declare_ret);
 839
 840         LASSERT(ta->ta_handle->th_dev != NULL);
 841         rc = out_trans_start(env, ta);
 842         if (unlikely(rc != 0))
 843                 GOTO(stop, rc);
 844
 845         for (i = 0; i < ta->ta_argno; i++) {
 846                 rc = ta->ta_args[i]->exec_fn(env, ta->ta_handle,
 847                                              ta->ta_args[i]);
 848                 if (unlikely(rc != 0)) {
 849                         CDEBUG(D_INFO, "error during execution of #%u from"
 850                                " %s:%d: rc = %d\n", i, ta->ta_args[i]->file,
 851                                ta->ta_args[i]->line, rc);
 852                         while (--i >= 0) {
 853                                 if (ta->ta_args[i]->undo_fn != NULL)
 854                                         ta->ta_args[i]->undo_fn(env,
 855                                                                ta->ta_handle,
 856                                                                ta->ta_args[i]);
 857                                 else
 858                                         CERROR("%s: undo for %s:%d: rc = %d\n",
 859                                              dt_obd_name(ta->ta_handle->th_dev),
 860                                                ta->ta_args[i]->file,
 861                                                ta->ta_args[i]->line, -ENOTSUPP);
 862                         }
 863                         break;
 864                 }
 865                 CDEBUG(D_INFO, "%s: executed %u/%u: rc = %d\n",
 866                        dt_obd_name(ta->ta_handle->th_dev), i, ta->ta_argno, rc);
 867         }
 868
 869         /* Only fail for real updates, XXX right now llog updates will be
 870         * ignore, whose updates count is usually 1, so failover test
 871         * case will spot this FAIL_UPDATE_NET_REP precisely, and it will
 872         * be removed after async update patch is landed. */
 873         if (ta->ta_argno > 1)
 874                 tsi->tsi_reply_fail_id = OBD_FAIL_OUT_UPDATE_NET_REP;
 875
 876 stop:
 877         rc1 = out_trans_stop(env, ta, rc);
 878         if (rc == 0)
 879                 rc = rc1;
 880
 881         ta->ta_handle = NULL;
 882         ta->ta_argno = 0;
 883
 884         RETURN(rc);
 885 }
 886
 887 /**
 888  * Object updates between Targets. Because all the updates has been
 889  * dis-assemblied into object updates at sender side, so OUT will
 890  * call OSD API directly to execute these updates.
 891  *
 892  * In DNE phase I all of the updates in the request need to be executed
 893  * in one transaction, and the transaction has to be synchronously.
 894  *
 895  * Please refer to lustre/include/lustre/lustre_idl.h for req/reply
 896  * format.
 897  */
 898 int out_handle(struct tgt_session_info *tsi)
 899 {
 900         const struct lu_env             *env = tsi->tsi_env;
 901         struct tgt_thread_info          *tti = tgt_th_info(env);
 902         struct thandle_exec_args        *ta = &tti->tti_tea;
 903         struct req_capsule              *pill = tsi->tsi_pill;
 904         struct dt_device                *dt = tsi->tsi_tgt->lut_bottom;
 905         struct out_update_header        *ouh;
 906         struct out_update_buffer        *oub = NULL;
 907         struct object_update            *update;
 908         struct object_update_reply      *reply;
 909         struct ptlrpc_bulk_desc         *desc = NULL;
 910         struct l_wait_info              lwi;
 911         void                            **update_bufs;
 912         int                             current_batchid = -1;
 913         __u32                           update_buf_count;
 914         unsigned int                    i;
 915         unsigned int                    reply_index = 0;
 916         int                             rc = 0;
 917         int                             rc1 = 0;
 918         int                             ouh_size, reply_size;
 919         int                             updates;
 920         ENTRY;
 921
 922         req_capsule_set(pill, &RQF_OUT_UPDATE);
 923         ouh_size = req_capsule_get_size(pill, &RMF_OUT_UPDATE_HEADER,
 924                                         RCL_CLIENT);
 925         if (ouh_size <= 0)
 926                 RETURN(err_serious(-EPROTO));
 927
 928         ouh = req_capsule_client_get(pill, &RMF_OUT_UPDATE_HEADER);
 929         if (ouh == NULL)
 930                 RETURN(err_serious(-EPROTO));
 931
 932         if (ouh->ouh_magic != OUT_UPDATE_HEADER_MAGIC) {
 933                 CERROR("%s: invalid update buffer magic %x expect %x: "
 934                        "rc = %d\n", tgt_name(tsi->tsi_tgt), ouh->ouh_magic,
 935                        UPDATE_REQUEST_MAGIC, -EPROTO);
 936                 RETURN(err_serious(-EPROTO));
 937         }
 938
 939         update_buf_count = ouh->ouh_count;
 940         if (update_buf_count == 0)
 941                 RETURN(err_serious(-EPROTO));
 942
 943         OBD_ALLOC(update_bufs, sizeof(*update_bufs) * update_buf_count);
 944         if (update_bufs == NULL)
 945                 RETURN(err_serious(-ENOMEM));
 946
 947         if (ouh->ouh_inline_length > 0) {
 948                 update_bufs[0] = ouh->ouh_inline_data;
 949         } else {
 950                 struct out_update_buffer *tmp;
 951
 952                 oub = req_capsule_client_get(pill, &RMF_OUT_UPDATE_BUF);
 953                 if (oub == NULL)
 954                         GOTO(out_free, rc = err_serious(-EPROTO));
 955
 956                 desc = ptlrpc_prep_bulk_exp(pill->rc_req, update_buf_count,
 957                                             PTLRPC_BULK_OPS_COUNT,
 958                                             PTLRPC_BULK_GET_SINK |
 959                                             PTLRPC_BULK_BUF_KVEC,
 960                                             MDS_BULK_PORTAL,
 961                                             &ptlrpc_bulk_kvec_ops);
 962                 if (desc == NULL)
 963                         GOTO(out_free, rc = err_serious(-ENOMEM));
 964
 965                 tmp = oub;
 966                 for (i = 0; i < update_buf_count; i++, tmp++) {
 967                         if (tmp->oub_size >= OUT_MAXREQSIZE)
 968                                 GOTO(out_free, rc = err_serious(-EPROTO));
 969
 970                         OBD_ALLOC_LARGE(update_bufs[i], tmp->oub_size);
 971                         if (update_bufs[i] == NULL)
 972                                 GOTO(out_free, rc = err_serious(-ENOMEM));
 973
 974                         desc->bd_frag_ops->add_iov_frag(desc, update_bufs[i],
 975                                                         tmp->oub_size);
 976                 }
 977
 978                 pill->rc_req->rq_bulk_write = 1;
 979                 rc = sptlrpc_svc_prep_bulk(pill->rc_req, desc);
 980                 if (rc != 0)
 981                         GOTO(out_free, rc = err_serious(rc));
 982
 983                 rc = target_bulk_io(pill->rc_req->rq_export, desc, &lwi);
 984                 if (rc < 0)
 985                         GOTO(out_free, rc = err_serious(rc));
 986         }
 987         /* validate the request and calculate the total update count and
 988          * set it to reply */
 989         reply_size = 0;
 990         updates = 0;
 991         for (i = 0; i < update_buf_count; i++) {
 992                 struct object_update_request    *our;
 993                 int                              j;
 994
 995                 our = update_bufs[i];
 996                 if (ptlrpc_req_need_swab(pill->rc_req))
 997                         lustre_swab_object_update_request(our);
 998
 999                 if (our->ourq_magic != UPDATE_REQUEST_MAGIC) {
1000                         CERROR("%s: invalid update buffer magic %x"
1001                                " expect %x: rc = %d\n",
1002                                tgt_name(tsi->tsi_tgt), our->ourq_magic,
1003                                UPDATE_REQUEST_MAGIC, -EPROTO);
1004                         GOTO(out_free, rc = err_serious(-EPROTO));
1005                 }
1006                 updates += our->ourq_count;
1007
1008                 /* need to calculate reply size */
1009                 for (j = 0; j < our->ourq_count; j++) {
1010                         update = object_update_request_get(our, j, NULL);
1011                         if (update == NULL)
1012                                 GOTO(out, rc = err_serious(-EPROTO));
1013                         if (ptlrpc_req_need_swab(pill->rc_req))
1014                                 lustre_swab_object_update(update);
1015
1016                         if (!fid_is_sane(&update->ou_fid)) {
1017                                 CERROR("%s: invalid FID "DFID": rc = %d\n",
1018                                        tgt_name(tsi->tsi_tgt),
1019                                        PFID(&update->ou_fid), -EPROTO);
1020                                 GOTO(out, rc = err_serious(-EPROTO));
1021                         }
1022
1023                         /* XXX: what ou_result_size can be considered safe? */
1024
1025                         reply_size += sizeof(reply->ourp_lens[0]);
1026                         reply_size += sizeof(struct object_update_result);
1027                         reply_size += update->ou_result_size;
1028                 }
1029         }
1030         reply_size += sizeof(*reply);
1031
1032         if (unlikely(reply_size > ouh->ouh_reply_size)) {
1033                 CERROR("%s: too small reply buf %u for %u, need %u at least\n",
1034                        tgt_name(tsi->tsi_tgt), ouh->ouh_reply_size,
1035                        updates, reply_size);
1036                 GOTO(out_free, rc = err_serious(-EPROTO));
1037         }
1038
1039         req_capsule_set_size(pill, &RMF_OUT_UPDATE_REPLY, RCL_SERVER,
1040                              ouh->ouh_reply_size);
1041         rc = req_capsule_server_pack(pill);
1042         if (rc != 0) {
1043                 CERROR("%s: Can't pack response: rc = %d\n",
1044                        tgt_name(tsi->tsi_tgt), rc);
1045                 GOTO(out_free, rc = err_serious(-EPROTO));
1046         }
1047
1048         /* Prepare the update reply buffer */
1049         reply = req_capsule_server_get(pill, &RMF_OUT_UPDATE_REPLY);
1050         if (reply == NULL)
1051                 GOTO(out_free, rc = -EPROTO);
1052         reply->ourp_magic = UPDATE_REPLY_MAGIC;
1053         reply->ourp_count = updates;
1054         tti->tti_u.update.tti_update_reply = reply;
1055         tti->tti_mult_trans = !req_is_replay(tgt_ses_req(tsi));
1056
1057         /* Walk through updates in the request to execute them */
1058         for (i = 0; i < update_buf_count; i++) {
1059                 struct tgt_handler      *h;
1060                 struct dt_object        *dt_obj;
1061                 int                     update_count;
1062                 struct object_update_request *our;
1063                 int                     j;
1064
1065                 our = update_bufs[i];
1066                 update_count = our->ourq_count;
1067                 for (j = 0; j < update_count; j++) {
1068                         struct lu_object_conf conf;
1069
1070                         update = object_update_request_get(our, j, NULL);
1071                         if (update->ou_type == OUT_CREATE)
1072                                 conf.loc_flags = LOC_F_NEW;
1073                         else
1074                                 conf.loc_flags = 0;
1075
1076                         dt_obj = dt_locate_at(env, dt, &update->ou_fid,
1077                                 dt->dd_lu_dev.ld_site->ls_top_dev, &conf);
1078                         if (IS_ERR(dt_obj))
1079                                 GOTO(out, rc = PTR_ERR(dt_obj));
1080
1081                         if (dt->dd_record_fid_accessed) {
1082                                 struct lfsck_req_local *lrl = &tti->tti_lrl;
1083
1084                                 lfsck_pack_rfa(lrl,
1085                                                lu_object_fid(&dt_obj->do_lu),
1086                                                LEL_FID_ACCESSED,
1087                                                LFSCK_TYPE_LAYOUT);
1088                                 tgt_lfsck_in_notify_local(env, dt, lrl, NULL);
1089                         }
1090
1091                         tti->tti_u.update.tti_dt_object = dt_obj;
1092                         tti->tti_u.update.tti_update = update;
1093                         tti->tti_u.update.tti_update_reply_index = reply_index;
1094
1095                         h = out_handler_find(update->ou_type);
1096                         if (unlikely(h == NULL)) {
1097                                 CERROR("%s: unsupported opc: 0x%x\n",
1098                                        tgt_name(tsi->tsi_tgt), update->ou_type);
1099                                 GOTO(next, rc = -ENOTSUPP);
1100                         }
1101
1102                         /* Check resend case only for modifying RPC */
1103                         if (h->th_flags & MUTABOR) {
1104                                 struct ptlrpc_request *req = tgt_ses_req(tsi);
1105
1106                                 if (out_check_resent(env, dt, dt_obj, req,
1107                                                      out_reconstruct, reply,
1108                                                      reply_index))
1109                                         GOTO(next, rc = 0);
1110
1111                                 if (dt->dd_rdonly)
1112                                         GOTO(next, rc = -EROFS);
1113                         }
1114
1115                         /* start transaction for modification RPC only */
1116                         if (h->th_flags & MUTABOR && current_batchid == -1) {
1117                                 current_batchid = update->ou_batchid;
1118                                 rc = out_tx_start(env, dt, ta, tsi->tsi_exp);
1119                                 if (rc != 0)
1120                                         GOTO(next, rc);
1121
1122                                 if (update->ou_flags & UPDATE_FL_SYNC)
1123                                         ta->ta_handle->th_sync = 1;
1124                         }
1125
1126                         /* Stop the current update transaction, if the update
1127                          * has different batchid, or read-only update */
1128                         if (((current_batchid != update->ou_batchid) ||
1129                              !(h->th_flags & MUTABOR)) &&
1130                              ta->ta_handle != NULL) {
1131                                 rc = out_tx_end(env, ta, rc);
1132                                 current_batchid = -1;
1133                                 if (rc != 0)
1134                                         GOTO(next, rc);
1135
1136                                 /* start a new transaction if needed */
1137                                 if (h->th_flags & MUTABOR) {
1138                                         rc = out_tx_start(env, dt, ta,
1139                                                           tsi->tsi_exp);
1140                                         if (rc != 0)
1141                                                 GOTO(next, rc);
1142                                         if (update->ou_flags & UPDATE_FL_SYNC)
1143                                                 ta->ta_handle->th_sync = 1;
1144                                         current_batchid = update->ou_batchid;
1145                                 }
1146                         }
1147
1148                         rc = h->th_act(tsi);
1149 next:
1150                         reply_index++;
1151                         dt_object_put(env, dt_obj);
1152                         if (rc < 0)
1153                                 GOTO(out, rc);
1154                 }
1155         }
1156 out:
1157         if (current_batchid != -1) {
1158                 rc1 = out_tx_end(env, ta, rc);
1159                 if (rc == 0)
1160                         rc = rc1;
1161         }
1162
1163 out_free:
1164         if (update_bufs != NULL) {
1165                 if (oub != NULL) {
1166                         for (i = 0; i < update_buf_count; i++, oub++) {
1167                                 if (update_bufs[i] != NULL)
1168                                         OBD_FREE_LARGE(update_bufs[i],
1169                                                        oub->oub_size);
1170                         }
1171                 }
1172
1173                 OBD_FREE(update_bufs, sizeof(*update_bufs) * update_buf_count);
1174         }
1175
1176         if (desc != NULL)
1177                 ptlrpc_free_bulk(desc);
1178
1179         RETURN(rc);
1180 }
1181
1182 struct tgt_handler tgt_out_handlers[] = {
1183 TGT_UPDATE_HDL(MUTABOR, OUT_UPDATE,     out_handle),
1184 };
1185 EXPORT_SYMBOL(tgt_out_handlers);
1186