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, 2016, 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, 0, 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         object_update_result_insert(reply, lbuf->lb_buf, lbuf->lb_len, idx, rc);
 298         RETURN(0);
 299 }
 300
 301 static int out_index_lookup(struct tgt_session_info *tsi)
 302 {
 303         const struct lu_env     *env = tsi->tsi_env;
 304         struct tgt_thread_info  *tti = tgt_th_info(env);
 305         struct object_update    *update = tti->tti_u.update.tti_update;
 306         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 307         char                    *name;
 308         int                      rc;
 309
 310         ENTRY;
 311
 312         if (unlikely(update->ou_result_size < sizeof(tti->tti_fid1)))
 313                 return -EPROTO;
 314
 315         if (!lu_object_exists(&obj->do_lu))
 316                 RETURN(-ENOENT);
 317
 318         name = object_update_param_get(update, 0, NULL);
 319         if (IS_ERR(name)) {
 320                 CERROR("%s: empty name for lookup: rc = %ld\n",
 321                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 322                 RETURN(PTR_ERR(name));
 323         }
 324
 325         dt_read_lock(env, obj, MOR_TGT_CHILD);
 326         if (!dt_try_as_dir(env, obj))
 327                 GOTO(out_unlock, rc = -ENOTDIR);
 328
 329         rc = dt_lookup(env, obj, (struct dt_rec *)&tti->tti_fid1,
 330                        (struct dt_key *)name);
 331
 332         if (rc < 0)
 333                 GOTO(out_unlock, rc);
 334
 335         if (rc == 0)
 336                 rc += 1;
 337
 338 out_unlock:
 339         dt_read_unlock(env, obj);
 340
 341         CDEBUG(D_INFO, "lookup "DFID" %s get "DFID" rc %d\n",
 342                PFID(lu_object_fid(&obj->do_lu)), name,
 343                PFID(&tti->tti_fid1), rc);
 344
 345         CDEBUG(D_INFO, "%s: insert lookup reply %p index %d: rc = %d\n",
 346                tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
 347                0, rc);
 348
 349         object_update_result_insert(tti->tti_u.update.tti_update_reply,
 350                             &tti->tti_fid1, sizeof(tti->tti_fid1),
 351                             tti->tti_u.update.tti_update_reply_index, rc);
 352         RETURN(rc);
 353 }
 354
 355 static int out_xattr_set(struct tgt_session_info *tsi)
 356 {
 357         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 358         struct object_update    *update = tti->tti_u.update.tti_update;
 359         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 360         struct lu_buf           *lbuf = &tti->tti_buf;
 361         char                    *name;
 362         char                    *buf;
 363         __u32                   *tmp;
 364         size_t                   buf_len = 0;
 365         int                      flag;
 366         size_t                   size = 0;
 367         int                      rc;
 368         ENTRY;
 369
 370         name = object_update_param_get(update, 0, NULL);
 371         if (IS_ERR(name)) {
 372                 CERROR("%s: empty name for xattr set: rc = %ld\n",
 373                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 374                 RETURN(PTR_ERR(name));
 375         }
 376
 377         /* If buffer == NULL (-ENODATA), then it might mean delete xattr */
 378         buf = object_update_param_get(update, 1, &buf_len);
 379         if (IS_ERR(buf) && PTR_ERR(buf) != -ENODATA)
 380                 RETURN(PTR_ERR(buf));
 381
 382         lbuf->lb_buf = buf;
 383         lbuf->lb_len = buf_len;
 384
 385         tmp = object_update_param_get(update, 2, &size);
 386         if (IS_ERR(tmp) || size != sizeof(*tmp)) {
 387                 CERROR("%s: emptry or wrong size %zu flag: rc = %ld\n",
 388                        tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
 389                 RETURN(PTR_ERR(tmp));
 390         }
 391
 392         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 393                 __swab32s(tmp);
 394         flag = *tmp;
 395
 396         rc = out_tx_xattr_set(tsi->tsi_env, obj, lbuf, name, flag,
 397                               &tti->tti_tea, tti->tti_tea.ta_handle,
 398                               tti->tti_u.update.tti_update_reply,
 399                               tti->tti_u.update.tti_update_reply_index);
 400         RETURN(rc);
 401 }
 402
 403 static int out_xattr_del(struct tgt_session_info *tsi)
 404 {
 405         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 406         struct object_update    *update = tti->tti_u.update.tti_update;
 407         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 408         char                    *name;
 409         int                      rc;
 410         ENTRY;
 411
 412         name = object_update_param_get(update, 0, NULL);
 413         if (IS_ERR(name)) {
 414                 CERROR("%s: empty name for xattr set: rc = %ld\n",
 415                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 416                 RETURN(PTR_ERR(name));
 417         }
 418
 419         rc = out_tx_xattr_del(tsi->tsi_env, obj, name, &tti->tti_tea,
 420                               tti->tti_tea.ta_handle,
 421                               tti->tti_u.update.tti_update_reply,
 422                               tti->tti_u.update.tti_update_reply_index);
 423         RETURN(rc);
 424 }
 425
 426 /**
 427  * increase ref of the object
 428  **/
 429 static int out_ref_add(struct tgt_session_info *tsi)
 430 {
 431         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 432         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 433         int                      rc;
 434
 435         ENTRY;
 436
 437         rc = out_tx_ref_add(tsi->tsi_env, obj, &tti->tti_tea,
 438                             tti->tti_tea.ta_handle,
 439                             tti->tti_u.update.tti_update_reply,
 440                             tti->tti_u.update.tti_update_reply_index);
 441         RETURN(rc);
 442 }
 443
 444 static int out_ref_del(struct tgt_session_info *tsi)
 445 {
 446         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 447         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 448         int                      rc;
 449
 450         ENTRY;
 451
 452         if (!lu_object_exists(&obj->do_lu))
 453                 RETURN(-ENOENT);
 454
 455         rc = out_tx_ref_del(tsi->tsi_env, obj, &tti->tti_tea,
 456                             tti->tti_tea.ta_handle,
 457                             tti->tti_u.update.tti_update_reply,
 458                             tti->tti_u.update.tti_update_reply_index);
 459         RETURN(rc);
 460 }
 461
 462 static int out_index_insert(struct tgt_session_info *tsi)
 463 {
 464         struct tgt_thread_info  *tti    = tgt_th_info(tsi->tsi_env);
 465         struct object_update    *update = tti->tti_u.update.tti_update;
 466         struct dt_object        *obj    = tti->tti_u.update.tti_dt_object;
 467         struct dt_insert_rec    *rec    = &tti->tti_rec;
 468         struct lu_fid           *fid;
 469         char                    *name;
 470         __u32                   *ptype;
 471         int                      rc     = 0;
 472         size_t                   size;
 473         ENTRY;
 474
 475         name = object_update_param_get(update, 0, NULL);
 476         if (IS_ERR(name)) {
 477                 CERROR("%s: empty name for index insert: rc = %ld\n",
 478                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 479                 RETURN(PTR_ERR(name));
 480         }
 481
 482         fid = object_update_param_get(update, 1, &size);
 483         if (IS_ERR(fid) || size != sizeof(*fid)) {
 484                 CERROR("%s: invalid fid: rc = %ld\n",
 485                        tgt_name(tsi->tsi_tgt), PTR_ERR(fid));
 486                 RETURN(PTR_ERR(fid));
 487         }
 488
 489         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 490                 lustre_swab_lu_fid(fid);
 491
 492         if (!fid_is_sane(fid)) {
 493                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 494                        tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 495                 RETURN(-EPROTO);
 496         }
 497
 498         ptype = object_update_param_get(update, 2, &size);
 499         if (IS_ERR(ptype) || size != sizeof(*ptype)) {
 500                 CERROR("%s: invalid type for index insert: rc = %ld\n",
 501                        tgt_name(tsi->tsi_tgt), PTR_ERR(ptype));
 502                 RETURN(PTR_ERR(ptype));
 503         }
 504
 505         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 506                 __swab32s(ptype);
 507
 508         rec->rec_fid = fid;
 509         rec->rec_type = *ptype;
 510
 511         rc = out_tx_index_insert(tsi->tsi_env, obj, (const struct dt_rec *)rec,
 512                                  (const struct dt_key *)name, &tti->tti_tea,
 513                                  tti->tti_tea.ta_handle,
 514                                  tti->tti_u.update.tti_update_reply,
 515                                  tti->tti_u.update.tti_update_reply_index);
 516         RETURN(rc);
 517 }
 518
 519 static int out_index_delete(struct tgt_session_info *tsi)
 520 {
 521         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 522         struct object_update    *update = tti->tti_u.update.tti_update;
 523         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 524         char                    *name;
 525         int                      rc = 0;
 526
 527         if (!lu_object_exists(&obj->do_lu))
 528                 RETURN(-ENOENT);
 529
 530         name = object_update_param_get(update, 0, NULL);
 531         if (IS_ERR(name)) {
 532                 CERROR("%s: empty name for index delete: rc = %ld\n",
 533                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 534                 RETURN(PTR_ERR(name));
 535         }
 536
 537         rc = out_tx_index_delete(tsi->tsi_env, obj, (const struct dt_key *)name,
 538                                  &tti->tti_tea, tti->tti_tea.ta_handle,
 539                                  tti->tti_u.update.tti_update_reply,
 540                                  tti->tti_u.update.tti_update_reply_index);
 541         RETURN(rc);
 542 }
 543
 544 static int out_destroy(struct tgt_session_info *tsi)
 545 {
 546         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 547         struct object_update    *update = tti->tti_u.update.tti_update;
 548         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 549         struct lu_fid           *fid;
 550         int                      rc;
 551         ENTRY;
 552
 553         fid = &update->ou_fid;
 554         if (!fid_is_sane(fid)) {
 555                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 556                        tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 557                 RETURN(-EPROTO);
 558         }
 559
 560         if (!lu_object_exists(&obj->do_lu))
 561                 RETURN(-ENOENT);
 562
 563         rc = out_tx_destroy(tsi->tsi_env, obj, &tti->tti_tea,
 564                             tti->tti_tea.ta_handle,
 565                             tti->tti_u.update.tti_update_reply,
 566                             tti->tti_u.update.tti_update_reply_index);
 567
 568         RETURN(rc);
 569 }
 570
 571 static int out_write(struct tgt_session_info *tsi)
 572 {
 573         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 574         struct object_update    *update = tti->tti_u.update.tti_update;
 575         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 576         struct lu_buf           *lbuf = &tti->tti_buf;
 577         char                    *buf;
 578         __u64                   *tmp;
 579         size_t                  size = 0;
 580         size_t                  buf_len = 0;
 581         loff_t                  pos;
 582         int                      rc;
 583         ENTRY;
 584
 585         buf = object_update_param_get(update, 0, &buf_len);
 586         if (IS_ERR(buf) || buf_len == 0) {
 587                 CERROR("%s: empty buf for xattr set: rc = %ld\n",
 588                        tgt_name(tsi->tsi_tgt), PTR_ERR(buf));
 589                 RETURN(PTR_ERR(buf));
 590         }
 591         lbuf->lb_buf = buf;
 592         lbuf->lb_len = buf_len;
 593
 594         tmp = object_update_param_get(update, 1, &size);
 595         if (IS_ERR(tmp) || size != sizeof(*tmp)) {
 596                 CERROR("%s: empty or wrong size %zu pos: rc = %ld\n",
 597                        tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
 598                 RETURN(PTR_ERR(tmp));
 599         }
 600
 601         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 602                 __swab64s(tmp);
 603         pos = *tmp;
 604
 605         rc = out_tx_write(tsi->tsi_env, obj, lbuf, pos,
 606                           &tti->tti_tea, tti->tti_tea.ta_handle,
 607                           tti->tti_u.update.tti_update_reply,
 608                           tti->tti_u.update.tti_update_reply_index);
 609         RETURN(rc);
 610 }
 611
 612 static int out_read(struct tgt_session_info *tsi)
 613 {
 614         const struct lu_env     *env = tsi->tsi_env;
 615         struct tgt_thread_info  *tti = tgt_th_info(env);
 616         struct object_update    *update = tti->tti_u.update.tti_update;
 617         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 618         struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
 619         int index = tti->tti_u.update.tti_update_reply_index;
 620         struct lu_rdbuf *rdbuf;
 621         struct object_update_result *update_result;
 622         struct out_read_reply   *orr;
 623         void *tmp;
 624         size_t size;
 625         size_t total_size = 0;
 626         __u64 pos;
 627         unsigned int i;
 628         unsigned int nbufs;
 629         int rc = 0;
 630         ENTRY;
 631
 632         update_result = object_update_result_get(reply, index, NULL);
 633         LASSERT(update_result != NULL);
 634         update_result->our_datalen = sizeof(*orr);
 635
 636         if (!lu_object_exists(&obj->do_lu))
 637                 GOTO(out, rc = -ENOENT);
 638
 639         tmp = object_update_param_get(update, 0, NULL);
 640         if (IS_ERR(tmp)) {
 641                 CERROR("%s: empty size for read: rc = %ld\n",
 642                        tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
 643                 GOTO(out, rc = PTR_ERR(tmp));
 644         }
 645         size = le64_to_cpu(*(size_t *)(tmp));
 646
 647         tmp = object_update_param_get(update, 1, NULL);
 648         if (IS_ERR(tmp)) {
 649                 CERROR("%s: empty pos for read: rc = %ld\n",
 650                        tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
 651                 GOTO(out, rc = PTR_ERR(tmp));
 652         }
 653         pos = le64_to_cpu(*(__u64 *)(tmp));
 654
 655         /* Put the offset into the begining of the buffer in reply */
 656         orr = (struct out_read_reply *)update_result->our_data;
 657
 658         nbufs = (size + OUT_BULK_BUFFER_SIZE - 1) / OUT_BULK_BUFFER_SIZE;
 659         OBD_ALLOC(rdbuf, sizeof(struct lu_rdbuf) +
 660                          nbufs * sizeof(rdbuf->rb_bufs[0]));
 661         if (rdbuf == NULL)
 662                 GOTO(out, rc = -ENOMEM);
 663
 664         rdbuf->rb_nbufs = 0;
 665         total_size = 0;
 666         for (i = 0; i < nbufs; i++) {
 667                 __u32 read_size;
 668
 669                 read_size = size > OUT_BULK_BUFFER_SIZE ?
 670                             OUT_BULK_BUFFER_SIZE : size;
 671                 OBD_ALLOC(rdbuf->rb_bufs[i].lb_buf, read_size);
 672                 if (rdbuf->rb_bufs[i].lb_buf == NULL)
 673                         GOTO(out_free, rc = -ENOMEM);
 674
 675                 rdbuf->rb_bufs[i].lb_len = read_size;
 676                 dt_read_lock(env, obj, MOR_TGT_CHILD);
 677                 rc = dt_read(env, obj, &rdbuf->rb_bufs[i], &pos);
 678                 dt_read_unlock(env, obj);
 679
 680                 total_size += rc < 0 ? 0 : rc;
 681                 if (rc <= 0)
 682                         break;
 683
 684                 rdbuf->rb_nbufs++;
 685                 size -= read_size;
 686         }
 687
 688         /* send pages to client */
 689         rc = tgt_send_buffer(tsi, rdbuf);
 690         if (rc < 0)
 691                 GOTO(out_free, rc);
 692
 693         orr->orr_size = total_size;
 694         orr->orr_offset = pos;
 695
 696         orr_cpu_to_le(orr, orr);
 697         update_result->our_datalen += orr->orr_size;
 698 out_free:
 699         for (i = 0; i < nbufs; i++) {
 700                 if (rdbuf->rb_bufs[i].lb_buf != NULL) {
 701                         OBD_FREE(rdbuf->rb_bufs[i].lb_buf,
 702                                  rdbuf->rb_bufs[i].lb_len);
 703                 }
 704         }
 705         OBD_FREE(rdbuf, sizeof(struct lu_rdbuf) +
 706                         nbufs * sizeof(rdbuf->rb_bufs[0]));
 707 out:
 708         /* Insert read buffer */
 709         update_result->our_rc = ptlrpc_status_hton(rc);
 710         reply->ourp_lens[index] = cfs_size_round(update_result->our_datalen +
 711                                                  sizeof(*update_result));
 712         RETURN(rc);
 713 }
 714
 715 static int out_noop(struct tgt_session_info *tsi)
 716 {
 717         return 0;
 718 }
 719
 720 #define DEF_OUT_HNDL(opc, name, flags, fn)     \
 721 [opc - OUT_CREATE] = {                                  \
 722         .th_name    = name,                             \
 723         .th_fail_id = 0,                                \
 724         .th_opc     = opc,                              \
 725         .th_flags   = flags,                            \
 726         .th_act     = fn,                               \
 727         .th_fmt     = NULL,                             \
 728         .th_version = 0,                                \
 729 }
 730
 731 static struct tgt_handler out_update_ops[] = {
 732         DEF_OUT_HNDL(OUT_CREATE, "out_create", MUTABOR | HABEO_REFERO,
 733                      out_create),
 734         DEF_OUT_HNDL(OUT_DESTROY, "out_create", MUTABOR | HABEO_REFERO,
 735                      out_destroy),
 736         DEF_OUT_HNDL(OUT_REF_ADD, "out_ref_add", MUTABOR | HABEO_REFERO,
 737                      out_ref_add),
 738         DEF_OUT_HNDL(OUT_REF_DEL, "out_ref_del", MUTABOR | HABEO_REFERO,
 739                      out_ref_del),
 740         DEF_OUT_HNDL(OUT_ATTR_SET, "out_attr_set",  MUTABOR | HABEO_REFERO,
 741                      out_attr_set),
 742         DEF_OUT_HNDL(OUT_ATTR_GET, "out_attr_get",  HABEO_REFERO,
 743                      out_attr_get),
 744         DEF_OUT_HNDL(OUT_XATTR_SET, "out_xattr_set", MUTABOR | HABEO_REFERO,
 745                      out_xattr_set),
 746         DEF_OUT_HNDL(OUT_XATTR_DEL, "out_xattr_del", MUTABOR | HABEO_REFERO,
 747                      out_xattr_del),
 748         DEF_OUT_HNDL(OUT_XATTR_GET, "out_xattr_get", HABEO_REFERO,
 749                      out_xattr_get),
 750         DEF_OUT_HNDL(OUT_INDEX_LOOKUP, "out_index_lookup", HABEO_REFERO,
 751                      out_index_lookup),
 752         DEF_OUT_HNDL(OUT_INDEX_INSERT, "out_index_insert",
 753                      MUTABOR | HABEO_REFERO, out_index_insert),
 754         DEF_OUT_HNDL(OUT_INDEX_DELETE, "out_index_delete",
 755                      MUTABOR | HABEO_REFERO, out_index_delete),
 756         DEF_OUT_HNDL(OUT_WRITE, "out_write", MUTABOR | HABEO_REFERO, out_write),
 757         DEF_OUT_HNDL(OUT_READ, "out_read", HABEO_REFERO, out_read),
 758         DEF_OUT_HNDL(OUT_NOOP, "out_noop", HABEO_REFERO, out_noop),
 759 };
 760
 761 static struct tgt_handler *out_handler_find(__u32 opc)
 762 {
 763         struct tgt_handler *h;
 764
 765         h = NULL;
 766         if (OUT_CREATE <= opc && opc < OUT_LAST) {
 767                 h = &out_update_ops[opc - OUT_CREATE];
 768                 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
 769                          h->th_opc, opc);
 770         } else {
 771                 h = NULL; /* unsupported opc */
 772         }
 773         return h;
 774 }
 775
 776 static int out_tx_start(const struct lu_env *env, struct dt_device *dt,
 777                         struct thandle_exec_args *ta, struct obd_export *exp)
 778 {
 779         ta->ta_argno = 0;
 780         ta->ta_handle = dt_trans_create(env, dt);
 781         if (IS_ERR(ta->ta_handle)) {
 782                 int rc;
 783
 784                 rc = PTR_ERR(ta->ta_handle);
 785                 ta->ta_handle = NULL;
 786                 CERROR("%s: start handle error: rc = %d\n", dt_obd_name(dt),
 787                        rc);
 788                 return rc;
 789         }
 790         if (exp->exp_need_sync)
 791                 ta->ta_handle->th_sync = 1;
 792
 793         return 0;
 794 }
 795
 796 static int out_trans_start(const struct lu_env *env,
 797                            struct thandle_exec_args *ta)
 798 {
 799         return dt_trans_start(env, ta->ta_handle->th_dev, ta->ta_handle);
 800 }
 801
 802 static int out_trans_stop(const struct lu_env *env,
 803                           struct thandle_exec_args *ta, int err)
 804 {
 805         int i;
 806         int rc;
 807
 808         ta->ta_handle->th_result = err;
 809         rc = dt_trans_stop(env, ta->ta_handle->th_dev, ta->ta_handle);
 810         for (i = 0; i < ta->ta_argno; i++) {
 811                 if (ta->ta_args[i]->object != NULL) {
 812                         struct dt_object *obj = ta->ta_args[i]->object;
 813
 814                         /* If the object is being created during this
 815                          * transaction, we need to remove them from the
 816                          * cache immediately, because a few layers are
 817                          * missing in OUT handler, i.e. the object might
 818                          * not be initialized in all layers */
 819                         if (ta->ta_args[i]->exec_fn == out_tx_create_exec)
 820                                 set_bit(LU_OBJECT_HEARD_BANSHEE,
 821                                         &obj->do_lu.lo_header->loh_flags);
 822                         dt_object_put(env, ta->ta_args[i]->object);
 823                         ta->ta_args[i]->object = NULL;
 824                 }
 825         }
 826         ta->ta_handle = NULL;
 827         ta->ta_argno = 0;
 828
 829         return rc;
 830 }
 831
 832 static int out_tx_end(const struct lu_env *env, struct thandle_exec_args *ta,
 833                       int declare_ret)
 834 {
 835         struct tgt_session_info *tsi = tgt_ses_info(env);
 836         int                     i;
 837         int                     rc;
 838         int                     rc1;
 839         ENTRY;
 840
 841         if (ta->ta_handle == NULL)
 842                 RETURN(0);
 843
 844         if (declare_ret != 0 || ta->ta_argno == 0)
 845                 GOTO(stop, rc = declare_ret);
 846
 847         LASSERT(ta->ta_handle->th_dev != NULL);
 848         rc = out_trans_start(env, ta);
 849         if (unlikely(rc != 0))
 850                 GOTO(stop, rc);
 851
 852         for (i = 0; i < ta->ta_argno; i++) {
 853                 rc = ta->ta_args[i]->exec_fn(env, ta->ta_handle,
 854                                              ta->ta_args[i]);
 855                 if (unlikely(rc != 0)) {
 856                         CDEBUG(D_INFO, "error during execution of #%u from"
 857                                " %s:%d: rc = %d\n", i, ta->ta_args[i]->file,
 858                                ta->ta_args[i]->line, rc);
 859                         while (--i >= 0) {
 860                                 if (ta->ta_args[i]->undo_fn != NULL)
 861                                         ta->ta_args[i]->undo_fn(env,
 862                                                                ta->ta_handle,
 863                                                                ta->ta_args[i]);
 864                                 else
 865                                         CERROR("%s: undo for %s:%d: rc = %d\n",
 866                                              dt_obd_name(ta->ta_handle->th_dev),
 867                                                ta->ta_args[i]->file,
 868                                                ta->ta_args[i]->line, -ENOTSUPP);
 869                         }
 870                         break;
 871                 }
 872                 CDEBUG(D_INFO, "%s: executed %u/%u: rc = %d\n",
 873                        dt_obd_name(ta->ta_handle->th_dev), i, ta->ta_argno, rc);
 874         }
 875
 876         /* Only fail for real updates, XXX right now llog updates will be
 877         * ignore, whose updates count is usually 1, so failover test
 878         * case will spot this FAIL_UPDATE_NET_REP precisely, and it will
 879         * be removed after async update patch is landed. */
 880         if (ta->ta_argno > 1)
 881                 tsi->tsi_reply_fail_id = OBD_FAIL_OUT_UPDATE_NET_REP;
 882
 883 stop:
 884         rc1 = out_trans_stop(env, ta, rc);
 885         if (rc == 0)
 886                 rc = rc1;
 887
 888         ta->ta_handle = NULL;
 889         ta->ta_argno = 0;
 890
 891         RETURN(rc);
 892 }
 893
 894 /**
 895  * Object updates between Targets. Because all the updates has been
 896  * dis-assemblied into object updates at sender side, so OUT will
 897  * call OSD API directly to execute these updates.
 898  *
 899  * In DNE phase I all of the updates in the request need to be executed
 900  * in one transaction, and the transaction has to be synchronously.
 901  *
 902  * Please refer to lustre/include/lustre/lustre_idl.h for req/reply
 903  * format.
 904  */
 905 int out_handle(struct tgt_session_info *tsi)
 906 {
 907         const struct lu_env             *env = tsi->tsi_env;
 908         struct tgt_thread_info          *tti = tgt_th_info(env);
 909         struct thandle_exec_args        *ta = &tti->tti_tea;
 910         struct req_capsule              *pill = tsi->tsi_pill;
 911         struct dt_device                *dt = tsi->tsi_tgt->lut_bottom;
 912         struct out_update_header        *ouh;
 913         struct out_update_buffer        *oub = NULL;
 914         struct object_update            *update;
 915         struct object_update_reply      *reply;
 916         struct ptlrpc_bulk_desc         *desc = NULL;
 917         struct l_wait_info              lwi;
 918         void                            **update_bufs;
 919         int                             current_batchid = -1;
 920         __u32                           update_buf_count;
 921         unsigned int                    i;
 922         unsigned int                    reply_index = 0;
 923         int                             rc = 0;
 924         int                             rc1 = 0;
 925         int                             ouh_size, reply_size;
 926         int                             updates;
 927         ENTRY;
 928
 929         req_capsule_set(pill, &RQF_OUT_UPDATE);
 930         ouh_size = req_capsule_get_size(pill, &RMF_OUT_UPDATE_HEADER,
 931                                         RCL_CLIENT);
 932         if (ouh_size <= 0)
 933                 RETURN(err_serious(-EPROTO));
 934
 935         ouh = req_capsule_client_get(pill, &RMF_OUT_UPDATE_HEADER);
 936         if (ouh == NULL)
 937                 RETURN(err_serious(-EPROTO));
 938
 939         if (ouh->ouh_magic != OUT_UPDATE_HEADER_MAGIC) {
 940                 CERROR("%s: invalid update buffer magic %x expect %x: "
 941                        "rc = %d\n", tgt_name(tsi->tsi_tgt), ouh->ouh_magic,
 942                        UPDATE_REQUEST_MAGIC, -EPROTO);
 943                 RETURN(err_serious(-EPROTO));
 944         }
 945
 946         update_buf_count = ouh->ouh_count;
 947         if (update_buf_count == 0)
 948                 RETURN(err_serious(-EPROTO));
 949
 950         OBD_ALLOC(update_bufs, sizeof(*update_bufs) * update_buf_count);
 951         if (update_bufs == NULL)
 952                 RETURN(err_serious(-ENOMEM));
 953
 954         if (ouh->ouh_inline_length > 0) {
 955                 update_bufs[0] = ouh->ouh_inline_data;
 956         } else {
 957                 struct out_update_buffer *tmp;
 958
 959                 oub = req_capsule_client_get(pill, &RMF_OUT_UPDATE_BUF);
 960                 if (oub == NULL)
 961                         GOTO(out_free, rc = err_serious(-EPROTO));
 962
 963                 desc = ptlrpc_prep_bulk_exp(pill->rc_req, update_buf_count,
 964                                             PTLRPC_BULK_OPS_COUNT,
 965                                             PTLRPC_BULK_GET_SINK |
 966                                             PTLRPC_BULK_BUF_KVEC,
 967                                             MDS_BULK_PORTAL,
 968                                             &ptlrpc_bulk_kvec_ops);
 969                 if (desc == NULL)
 970                         GOTO(out_free, rc = err_serious(-ENOMEM));
 971
 972                 tmp = oub;
 973                 for (i = 0; i < update_buf_count; i++, tmp++) {
 974                         if (tmp->oub_size >= OUT_MAXREQSIZE)
 975                                 GOTO(out_free, rc = err_serious(-EPROTO));
 976
 977                         OBD_ALLOC(update_bufs[i], tmp->oub_size);
 978                         if (update_bufs[i] == NULL)
 979                                 GOTO(out_free, rc = err_serious(-ENOMEM));
 980
 981                         desc->bd_frag_ops->add_iov_frag(desc, update_bufs[i],
 982                                                         tmp->oub_size);
 983                 }
 984
 985                 pill->rc_req->rq_bulk_write = 1;
 986                 rc = sptlrpc_svc_prep_bulk(pill->rc_req, desc);
 987                 if (rc != 0)
 988                         GOTO(out_free, rc = err_serious(rc));
 989
 990                 rc = target_bulk_io(pill->rc_req->rq_export, desc, &lwi);
 991                 if (rc < 0)
 992                         GOTO(out_free, rc = err_serious(rc));
 993         }
 994         /* validate the request and calculate the total update count and
 995          * set it to reply */
 996         reply_size = 0;
 997         updates = 0;
 998         for (i = 0; i < update_buf_count; i++) {
 999                 struct object_update_request    *our;
1000                 int                              j;
1001
1002                 our = update_bufs[i];
1003                 if (ptlrpc_req_need_swab(pill->rc_req))
1004                         lustre_swab_object_update_request(our);
1005
1006                 if (our->ourq_magic != UPDATE_REQUEST_MAGIC) {
1007                         CERROR("%s: invalid update buffer magic %x"
1008                                " expect %x: rc = %d\n",
1009                                tgt_name(tsi->tsi_tgt), our->ourq_magic,
1010                                UPDATE_REQUEST_MAGIC, -EPROTO);
1011                         GOTO(out_free, rc = err_serious(-EPROTO));
1012                 }
1013                 updates += our->ourq_count;
1014
1015                 /* need to calculate reply size */
1016                 for (j = 0; j < our->ourq_count; j++) {
1017                         update = object_update_request_get(our, j, NULL);
1018                         if (update == NULL)
1019                                 GOTO(out, rc = err_serious(-EPROTO));
1020                         if (ptlrpc_req_need_swab(pill->rc_req))
1021                                 lustre_swab_object_update(update);
1022
1023                         if (!fid_is_sane(&update->ou_fid)) {
1024                                 CERROR("%s: invalid FID "DFID": rc = %d\n",
1025                                        tgt_name(tsi->tsi_tgt),
1026                                        PFID(&update->ou_fid), -EPROTO);
1027                                 GOTO(out, rc = err_serious(-EPROTO));
1028                         }
1029
1030                         /* XXX: what ou_result_size can be considered safe? */
1031
1032                         reply_size += sizeof(reply->ourp_lens[0]);
1033                         reply_size += sizeof(struct object_update_result);
1034                         reply_size += update->ou_result_size;
1035                 }
1036         }
1037         reply_size += sizeof(*reply);
1038
1039         if (unlikely(reply_size > ouh->ouh_reply_size)) {
1040                 CERROR("%s: too small reply buf %u for %u, need %u at least\n",
1041                        tgt_name(tsi->tsi_tgt), ouh->ouh_reply_size,
1042                        updates, reply_size);
1043                 GOTO(out_free, rc = err_serious(-EPROTO));
1044         }
1045
1046         req_capsule_set_size(pill, &RMF_OUT_UPDATE_REPLY, RCL_SERVER,
1047                              ouh->ouh_reply_size);
1048         rc = req_capsule_server_pack(pill);
1049         if (rc != 0) {
1050                 CERROR("%s: Can't pack response: rc = %d\n",
1051                        tgt_name(tsi->tsi_tgt), rc);
1052                 GOTO(out_free, rc = err_serious(-EPROTO));
1053         }
1054
1055         /* Prepare the update reply buffer */
1056         reply = req_capsule_server_get(pill, &RMF_OUT_UPDATE_REPLY);
1057         if (reply == NULL)
1058                 GOTO(out_free, rc = -EPROTO);
1059         reply->ourp_magic = UPDATE_REPLY_MAGIC;
1060         reply->ourp_count = updates;
1061         tti->tti_u.update.tti_update_reply = reply;
1062         tti->tti_mult_trans = !req_is_replay(tgt_ses_req(tsi));
1063
1064         /* Walk through updates in the request to execute them */
1065         for (i = 0; i < update_buf_count; i++) {
1066                 struct tgt_handler      *h;
1067                 struct dt_object        *dt_obj;
1068                 int                     update_count;
1069                 struct object_update_request *our;
1070                 int                     j;
1071
1072                 our = update_bufs[i];
1073                 update_count = our->ourq_count;
1074                 for (j = 0; j < update_count; j++) {
1075                         struct lu_object_conf conf;
1076
1077                         update = object_update_request_get(our, j, NULL);
1078                         if (update->ou_type == OUT_CREATE)
1079                                 conf.loc_flags = LOC_F_NEW;
1080                         else
1081                                 conf.loc_flags = 0;
1082
1083                         dt_obj = dt_locate_at(env, dt, &update->ou_fid,
1084                                 dt->dd_lu_dev.ld_site->ls_top_dev, &conf);
1085                         if (IS_ERR(dt_obj))
1086                                 GOTO(out, rc = PTR_ERR(dt_obj));
1087
1088                         if (dt->dd_record_fid_accessed) {
1089                                 struct lfsck_req_local *lrl = &tti->tti_lrl;
1090
1091                                 lfsck_pack_rfa(lrl,
1092                                                lu_object_fid(&dt_obj->do_lu),
1093                                                LEL_FID_ACCESSED,
1094                                                LFSCK_TYPE_LAYOUT);
1095                                 tgt_lfsck_in_notify_local(env, dt, lrl, NULL);
1096                         }
1097
1098                         tti->tti_u.update.tti_dt_object = dt_obj;
1099                         tti->tti_u.update.tti_update = update;
1100                         tti->tti_u.update.tti_update_reply_index = reply_index;
1101
1102                         h = out_handler_find(update->ou_type);
1103                         if (unlikely(h == NULL)) {
1104                                 CERROR("%s: unsupported opc: 0x%x\n",
1105                                        tgt_name(tsi->tsi_tgt), update->ou_type);
1106                                 GOTO(next, rc = -ENOTSUPP);
1107                         }
1108
1109                         /* Check resend case only for modifying RPC */
1110                         if (h->th_flags & MUTABOR) {
1111                                 struct ptlrpc_request *req = tgt_ses_req(tsi);
1112
1113                                 if (out_check_resent(env, dt, dt_obj, req,
1114                                                      out_reconstruct, reply,
1115                                                      reply_index))
1116                                         GOTO(next, rc = 0);
1117
1118                                 if (dt->dd_rdonly)
1119                                         GOTO(next, rc = -EROFS);
1120                         }
1121
1122                         /* start transaction for modification RPC only */
1123                         if (h->th_flags & MUTABOR && current_batchid == -1) {
1124                                 current_batchid = update->ou_batchid;
1125                                 rc = out_tx_start(env, dt, ta, tsi->tsi_exp);
1126                                 if (rc != 0)
1127                                         GOTO(next, rc);
1128
1129                                 if (update->ou_flags & UPDATE_FL_SYNC)
1130                                         ta->ta_handle->th_sync = 1;
1131                         }
1132
1133                         /* Stop the current update transaction, if the update
1134                          * has different batchid, or read-only update */
1135                         if (((current_batchid != update->ou_batchid) ||
1136                              !(h->th_flags & MUTABOR)) &&
1137                              ta->ta_handle != NULL) {
1138                                 rc = out_tx_end(env, ta, rc);
1139                                 current_batchid = -1;
1140                                 if (rc != 0)
1141                                         GOTO(next, rc);
1142
1143                                 /* start a new transaction if needed */
1144                                 if (h->th_flags & MUTABOR) {
1145                                         rc = out_tx_start(env, dt, ta,
1146                                                           tsi->tsi_exp);
1147                                         if (rc != 0)
1148                                                 GOTO(next, rc);
1149                                         if (update->ou_flags & UPDATE_FL_SYNC)
1150                                                 ta->ta_handle->th_sync = 1;
1151                                         current_batchid = update->ou_batchid;
1152                                 }
1153                         }
1154
1155                         rc = h->th_act(tsi);
1156 next:
1157                         reply_index++;
1158                         dt_object_put(env, dt_obj);
1159                         if (rc < 0)
1160                                 GOTO(out, rc);
1161                 }
1162         }
1163 out:
1164         if (current_batchid != -1) {
1165                 rc1 = out_tx_end(env, ta, rc);
1166                 if (rc == 0)
1167                         rc = rc1;
1168         }
1169
1170 out_free:
1171         if (update_bufs != NULL) {
1172                 if (oub != NULL) {
1173                         for (i = 0; i < update_buf_count; i++, oub++) {
1174                                 if (update_bufs[i] != NULL)
1175                                         OBD_FREE(update_bufs[i], oub->oub_size);
1176                         }
1177                 }
1178
1179                 OBD_FREE(update_bufs, sizeof(*update_bufs) * update_buf_count);
1180         }
1181
1182         if (desc != NULL)
1183                 ptlrpc_free_bulk(desc);
1184
1185         RETURN(rc);
1186 }
1187
1188 struct tgt_handler tgt_out_handlers[] = {
1189 TGT_UPDATE_HDL(MUTABOR, OUT_UPDATE,     out_handle),
1190 };
1191 EXPORT_SYMBOL(tgt_out_handlers);
1192