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         lustre_set_wire_obdo(NULL, obdo, obdo);
 228
 229 out_unlock:
 230         dt_read_unlock(env, obj);
 231
 232         CDEBUG(D_INFO, "%s: insert attr get reply %p index %d: rc = %d\n",
 233                tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
 234                0, rc);
 235
 236         object_update_result_insert(tti->tti_u.update.tti_update_reply, obdo,
 237                                     sizeof(*obdo), idx, rc);
 238
 239         RETURN(rc);
 240 }
 241
 242 static int out_xattr_get(struct tgt_session_info *tsi)
 243 {
 244         const struct lu_env        *env = tsi->tsi_env;
 245         struct tgt_thread_info     *tti = tgt_th_info(env);
 246         struct object_update       *update = tti->tti_u.update.tti_update;
 247         struct lu_buf              *lbuf = &tti->tti_buf;
 248         struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
 249         struct dt_object           *obj = tti->tti_u.update.tti_dt_object;
 250         char                       *name;
 251         struct object_update_result *update_result;
 252         int                     idx = tti->tti_u.update.tti_update_reply_index;
 253         int                        rc;
 254
 255         ENTRY;
 256
 257         if (!lu_object_exists(&obj->do_lu)) {
 258                 set_bit(LU_OBJECT_HEARD_BANSHEE,
 259                         &obj->do_lu.lo_header->loh_flags);
 260                 RETURN(-ENOENT);
 261         }
 262
 263         name = object_update_param_get(update, 0, NULL);
 264         if (IS_ERR(name)) {
 265                 CERROR("%s: empty name for xattr get: rc = %ld\n",
 266                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 267                 RETURN(PTR_ERR(name));
 268         }
 269
 270         update_result = object_update_result_get(reply, 0, NULL);
 271         if (update_result == NULL) {
 272                 CERROR("%s: empty name for xattr get: rc = %d\n",
 273                        tgt_name(tsi->tsi_tgt), -EPROTO);
 274                 RETURN(-EPROTO);
 275         }
 276
 277         lbuf->lb_len = (int)tti->tti_u.update.tti_update->ou_result_size;
 278         if (lbuf->lb_len == 0)
 279                 lbuf->lb_buf = NULL;
 280         else
 281                 lbuf->lb_buf = update_result->our_data;
 282
 283         dt_read_lock(env, obj, MOR_TGT_CHILD);
 284         rc = dt_xattr_get(env, obj, lbuf, name);
 285         dt_read_unlock(env, obj);
 286         if (rc <= 0) {
 287                 lbuf->lb_len = 0;
 288                 if (unlikely(!rc))
 289                         rc = -ENODATA;
 290         } else if (lbuf->lb_buf) {
 291                 lbuf->lb_len = rc;
 292         }
 293
 294         CDEBUG(D_INFO, "%s: "DFID" get xattr %s len %d: rc = %d\n",
 295                tgt_name(tsi->tsi_tgt), PFID(lu_object_fid(&obj->do_lu)),
 296                name, (int)lbuf->lb_len, rc);
 297
 298         object_update_result_insert(reply, lbuf->lb_buf, lbuf->lb_len, idx, rc);
 299         RETURN(0);
 300 }
 301
 302 static int out_index_lookup(struct tgt_session_info *tsi)
 303 {
 304         const struct lu_env     *env = tsi->tsi_env;
 305         struct tgt_thread_info  *tti = tgt_th_info(env);
 306         struct object_update    *update = tti->tti_u.update.tti_update;
 307         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 308         char                    *name;
 309         int                      rc;
 310
 311         ENTRY;
 312
 313         if (unlikely(update->ou_result_size < sizeof(tti->tti_fid1)))
 314                 return -EPROTO;
 315
 316         if (!lu_object_exists(&obj->do_lu))
 317                 RETURN(-ENOENT);
 318
 319         name = object_update_param_get(update, 0, NULL);
 320         if (IS_ERR(name)) {
 321                 CERROR("%s: empty name for lookup: rc = %ld\n",
 322                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 323                 RETURN(PTR_ERR(name));
 324         }
 325
 326         dt_read_lock(env, obj, MOR_TGT_CHILD);
 327         if (!dt_try_as_dir(env, obj))
 328                 GOTO(out_unlock, rc = -ENOTDIR);
 329
 330         rc = dt_lookup(env, obj, (struct dt_rec *)&tti->tti_fid1,
 331                        (struct dt_key *)name);
 332
 333         if (rc < 0)
 334                 GOTO(out_unlock, rc);
 335
 336         if (rc == 0)
 337                 rc += 1;
 338
 339 out_unlock:
 340         dt_read_unlock(env, obj);
 341
 342         CDEBUG(D_INFO, "lookup "DFID" %s get "DFID" rc %d\n",
 343                PFID(lu_object_fid(&obj->do_lu)), name,
 344                PFID(&tti->tti_fid1), rc);
 345
 346         CDEBUG(D_INFO, "%s: insert lookup reply %p index %d: rc = %d\n",
 347                tgt_name(tsi->tsi_tgt), tti->tti_u.update.tti_update_reply,
 348                0, rc);
 349
 350         object_update_result_insert(tti->tti_u.update.tti_update_reply,
 351                             &tti->tti_fid1, sizeof(tti->tti_fid1),
 352                             tti->tti_u.update.tti_update_reply_index, rc);
 353         RETURN(rc);
 354 }
 355
 356 static int out_xattr_set(struct tgt_session_info *tsi)
 357 {
 358         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 359         struct object_update    *update = tti->tti_u.update.tti_update;
 360         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 361         struct lu_buf           *lbuf = &tti->tti_buf;
 362         char                    *name;
 363         char                    *buf;
 364         __u32                   *tmp;
 365         size_t                   buf_len = 0;
 366         int                      flag;
 367         size_t                   size = 0;
 368         int                      rc;
 369         ENTRY;
 370
 371         name = object_update_param_get(update, 0, NULL);
 372         if (IS_ERR(name)) {
 373                 CERROR("%s: empty name for xattr set: rc = %ld\n",
 374                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 375                 RETURN(PTR_ERR(name));
 376         }
 377
 378         /* If buffer == NULL (-ENODATA), then it might mean delete xattr */
 379         buf = object_update_param_get(update, 1, &buf_len);
 380         if (IS_ERR(buf) && PTR_ERR(buf) != -ENODATA)
 381                 RETURN(PTR_ERR(buf));
 382
 383         lbuf->lb_buf = buf;
 384         lbuf->lb_len = buf_len;
 385
 386         tmp = object_update_param_get(update, 2, &size);
 387         if (IS_ERR(tmp) || size != sizeof(*tmp)) {
 388                 CERROR("%s: emptry or wrong size %zu flag: rc = %ld\n",
 389                        tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
 390                 RETURN(PTR_ERR(tmp));
 391         }
 392
 393         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 394                 __swab32s(tmp);
 395         flag = *tmp;
 396
 397         rc = out_tx_xattr_set(tsi->tsi_env, obj, lbuf, name, flag,
 398                               &tti->tti_tea, tti->tti_tea.ta_handle,
 399                               tti->tti_u.update.tti_update_reply,
 400                               tti->tti_u.update.tti_update_reply_index);
 401         RETURN(rc);
 402 }
 403
 404 static int out_xattr_del(struct tgt_session_info *tsi)
 405 {
 406         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 407         struct object_update    *update = tti->tti_u.update.tti_update;
 408         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 409         char                    *name;
 410         int                      rc;
 411         ENTRY;
 412
 413         name = object_update_param_get(update, 0, NULL);
 414         if (IS_ERR(name)) {
 415                 CERROR("%s: empty name for xattr set: rc = %ld\n",
 416                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 417                 RETURN(PTR_ERR(name));
 418         }
 419
 420         rc = out_tx_xattr_del(tsi->tsi_env, obj, name, &tti->tti_tea,
 421                               tti->tti_tea.ta_handle,
 422                               tti->tti_u.update.tti_update_reply,
 423                               tti->tti_u.update.tti_update_reply_index);
 424         RETURN(rc);
 425 }
 426
 427 /**
 428  * increase ref of the object
 429  **/
 430 static int out_ref_add(struct tgt_session_info *tsi)
 431 {
 432         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 433         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 434         int                      rc;
 435
 436         ENTRY;
 437
 438         rc = out_tx_ref_add(tsi->tsi_env, obj, &tti->tti_tea,
 439                             tti->tti_tea.ta_handle,
 440                             tti->tti_u.update.tti_update_reply,
 441                             tti->tti_u.update.tti_update_reply_index);
 442         RETURN(rc);
 443 }
 444
 445 static int out_ref_del(struct tgt_session_info *tsi)
 446 {
 447         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 448         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 449         int                      rc;
 450
 451         ENTRY;
 452
 453         if (!lu_object_exists(&obj->do_lu))
 454                 RETURN(-ENOENT);
 455
 456         rc = out_tx_ref_del(tsi->tsi_env, obj, &tti->tti_tea,
 457                             tti->tti_tea.ta_handle,
 458                             tti->tti_u.update.tti_update_reply,
 459                             tti->tti_u.update.tti_update_reply_index);
 460         RETURN(rc);
 461 }
 462
 463 static int out_index_insert(struct tgt_session_info *tsi)
 464 {
 465         struct tgt_thread_info  *tti    = tgt_th_info(tsi->tsi_env);
 466         struct object_update    *update = tti->tti_u.update.tti_update;
 467         struct dt_object        *obj    = tti->tti_u.update.tti_dt_object;
 468         struct dt_insert_rec    *rec    = &tti->tti_rec;
 469         struct lu_fid           *fid;
 470         char                    *name;
 471         __u32                   *ptype;
 472         int                      rc     = 0;
 473         size_t                   size;
 474         ENTRY;
 475
 476         name = object_update_param_get(update, 0, NULL);
 477         if (IS_ERR(name)) {
 478                 CERROR("%s: empty name for index insert: rc = %ld\n",
 479                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 480                 RETURN(PTR_ERR(name));
 481         }
 482
 483         fid = object_update_param_get(update, 1, &size);
 484         if (IS_ERR(fid) || size != sizeof(*fid)) {
 485                 CERROR("%s: invalid fid: rc = %ld\n",
 486                        tgt_name(tsi->tsi_tgt), PTR_ERR(fid));
 487                 RETURN(PTR_ERR(fid));
 488         }
 489
 490         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 491                 lustre_swab_lu_fid(fid);
 492
 493         if (!fid_is_sane(fid)) {
 494                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 495                        tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 496                 RETURN(-EPROTO);
 497         }
 498
 499         ptype = object_update_param_get(update, 2, &size);
 500         if (IS_ERR(ptype) || size != sizeof(*ptype)) {
 501                 CERROR("%s: invalid type for index insert: rc = %ld\n",
 502                        tgt_name(tsi->tsi_tgt), PTR_ERR(ptype));
 503                 RETURN(PTR_ERR(ptype));
 504         }
 505
 506         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 507                 __swab32s(ptype);
 508
 509         rec->rec_fid = fid;
 510         rec->rec_type = *ptype;
 511
 512         rc = out_tx_index_insert(tsi->tsi_env, obj, (const struct dt_rec *)rec,
 513                                  (const struct dt_key *)name, &tti->tti_tea,
 514                                  tti->tti_tea.ta_handle,
 515                                  tti->tti_u.update.tti_update_reply,
 516                                  tti->tti_u.update.tti_update_reply_index);
 517         RETURN(rc);
 518 }
 519
 520 static int out_index_delete(struct tgt_session_info *tsi)
 521 {
 522         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 523         struct object_update    *update = tti->tti_u.update.tti_update;
 524         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 525         char                    *name;
 526         int                      rc = 0;
 527
 528         if (!lu_object_exists(&obj->do_lu))
 529                 RETURN(-ENOENT);
 530
 531         name = object_update_param_get(update, 0, NULL);
 532         if (IS_ERR(name)) {
 533                 CERROR("%s: empty name for index delete: rc = %ld\n",
 534                        tgt_name(tsi->tsi_tgt), PTR_ERR(name));
 535                 RETURN(PTR_ERR(name));
 536         }
 537
 538         rc = out_tx_index_delete(tsi->tsi_env, obj, (const struct dt_key *)name,
 539                                  &tti->tti_tea, tti->tti_tea.ta_handle,
 540                                  tti->tti_u.update.tti_update_reply,
 541                                  tti->tti_u.update.tti_update_reply_index);
 542         RETURN(rc);
 543 }
 544
 545 static int out_destroy(struct tgt_session_info *tsi)
 546 {
 547         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 548         struct object_update    *update = tti->tti_u.update.tti_update;
 549         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 550         struct lu_fid           *fid;
 551         int                      rc;
 552         ENTRY;
 553
 554         fid = &update->ou_fid;
 555         if (!fid_is_sane(fid)) {
 556                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 557                        tgt_name(tsi->tsi_tgt), PFID(fid), -EPROTO);
 558                 RETURN(-EPROTO);
 559         }
 560
 561         if (!lu_object_exists(&obj->do_lu))
 562                 RETURN(-ENOENT);
 563
 564         rc = out_tx_destroy(tsi->tsi_env, obj, &tti->tti_tea,
 565                             tti->tti_tea.ta_handle,
 566                             tti->tti_u.update.tti_update_reply,
 567                             tti->tti_u.update.tti_update_reply_index);
 568
 569         RETURN(rc);
 570 }
 571
 572 static int out_write(struct tgt_session_info *tsi)
 573 {
 574         struct tgt_thread_info  *tti = tgt_th_info(tsi->tsi_env);
 575         struct object_update    *update = tti->tti_u.update.tti_update;
 576         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 577         struct lu_buf           *lbuf = &tti->tti_buf;
 578         char                    *buf;
 579         __u64                   *tmp;
 580         size_t                  size = 0;
 581         size_t                  buf_len = 0;
 582         loff_t                  pos;
 583         int                      rc;
 584         ENTRY;
 585
 586         buf = object_update_param_get(update, 0, &buf_len);
 587         if (IS_ERR(buf) || buf_len == 0) {
 588                 CERROR("%s: empty buf for xattr set: rc = %ld\n",
 589                        tgt_name(tsi->tsi_tgt), PTR_ERR(buf));
 590                 RETURN(PTR_ERR(buf));
 591         }
 592         lbuf->lb_buf = buf;
 593         lbuf->lb_len = buf_len;
 594
 595         tmp = object_update_param_get(update, 1, &size);
 596         if (IS_ERR(tmp) || size != sizeof(*tmp)) {
 597                 CERROR("%s: empty or wrong size %zu pos: rc = %ld\n",
 598                        tgt_name(tsi->tsi_tgt), size, PTR_ERR(tmp));
 599                 RETURN(PTR_ERR(tmp));
 600         }
 601
 602         if (ptlrpc_req_need_swab(tsi->tsi_pill->rc_req))
 603                 __swab64s(tmp);
 604         pos = *tmp;
 605
 606         rc = out_tx_write(tsi->tsi_env, obj, lbuf, pos,
 607                           &tti->tti_tea, tti->tti_tea.ta_handle,
 608                           tti->tti_u.update.tti_update_reply,
 609                           tti->tti_u.update.tti_update_reply_index);
 610         RETURN(rc);
 611 }
 612
 613 static int out_read(struct tgt_session_info *tsi)
 614 {
 615         const struct lu_env     *env = tsi->tsi_env;
 616         struct tgt_thread_info  *tti = tgt_th_info(env);
 617         struct object_update    *update = tti->tti_u.update.tti_update;
 618         struct dt_object        *obj = tti->tti_u.update.tti_dt_object;
 619         struct object_update_reply *reply = tti->tti_u.update.tti_update_reply;
 620         int index = tti->tti_u.update.tti_update_reply_index;
 621         struct lu_rdbuf *rdbuf;
 622         struct object_update_result *update_result;
 623         struct out_read_reply   *orr;
 624         void *tmp;
 625         size_t size;
 626         size_t total_size = 0;
 627         __u64 pos;
 628         unsigned int i;
 629         unsigned int nbufs;
 630         int rc = 0;
 631         ENTRY;
 632
 633         update_result = object_update_result_get(reply, index, NULL);
 634         LASSERT(update_result != NULL);
 635         update_result->our_datalen = sizeof(*orr);
 636
 637         if (!lu_object_exists(&obj->do_lu))
 638                 GOTO(out, rc = -ENOENT);
 639
 640         tmp = object_update_param_get(update, 0, NULL);
 641         if (IS_ERR(tmp)) {
 642                 CERROR("%s: empty size for read: rc = %ld\n",
 643                        tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
 644                 GOTO(out, rc = PTR_ERR(tmp));
 645         }
 646         size = le64_to_cpu(*(size_t *)(tmp));
 647
 648         tmp = object_update_param_get(update, 1, NULL);
 649         if (IS_ERR(tmp)) {
 650                 CERROR("%s: empty pos for read: rc = %ld\n",
 651                        tgt_name(tsi->tsi_tgt), PTR_ERR(tmp));
 652                 GOTO(out, rc = PTR_ERR(tmp));
 653         }
 654         pos = le64_to_cpu(*(__u64 *)(tmp));
 655
 656         /* Put the offset into the begining of the buffer in reply */
 657         orr = (struct out_read_reply *)update_result->our_data;
 658
 659         nbufs = (size + OUT_BULK_BUFFER_SIZE - 1) / OUT_BULK_BUFFER_SIZE;
 660         OBD_ALLOC(rdbuf, sizeof(struct lu_rdbuf) +
 661                          nbufs * sizeof(rdbuf->rb_bufs[0]));
 662         if (rdbuf == NULL)
 663                 GOTO(out, rc = -ENOMEM);
 664
 665         rdbuf->rb_nbufs = 0;
 666         total_size = 0;
 667         for (i = 0; i < nbufs; i++) {
 668                 __u32 read_size;
 669
 670                 read_size = size > OUT_BULK_BUFFER_SIZE ?
 671                             OUT_BULK_BUFFER_SIZE : size;
 672                 OBD_ALLOC(rdbuf->rb_bufs[i].lb_buf, read_size);
 673                 if (rdbuf->rb_bufs[i].lb_buf == NULL)
 674                         GOTO(out_free, rc = -ENOMEM);
 675
 676                 rdbuf->rb_bufs[i].lb_len = read_size;
 677                 dt_read_lock(env, obj, MOR_TGT_CHILD);
 678                 rc = dt_read(env, obj, &rdbuf->rb_bufs[i], &pos);
 679                 dt_read_unlock(env, obj);
 680
 681                 total_size += rc < 0 ? 0 : rc;
 682                 if (rc <= 0)
 683                         break;
 684
 685                 rdbuf->rb_nbufs++;
 686                 size -= read_size;
 687         }
 688
 689         /* send pages to client */
 690         rc = tgt_send_buffer(tsi, rdbuf);
 691         if (rc < 0)
 692                 GOTO(out_free, rc);
 693
 694         orr->orr_size = total_size;
 695         orr->orr_offset = pos;
 696
 697         orr_cpu_to_le(orr, orr);
 698         update_result->our_datalen += orr->orr_size;
 699 out_free:
 700         for (i = 0; i < nbufs; i++) {
 701                 if (rdbuf->rb_bufs[i].lb_buf != NULL) {
 702                         OBD_FREE(rdbuf->rb_bufs[i].lb_buf,
 703                                  rdbuf->rb_bufs[i].lb_len);
 704                 }
 705         }
 706         OBD_FREE(rdbuf, sizeof(struct lu_rdbuf) +
 707                         nbufs * sizeof(rdbuf->rb_bufs[0]));
 708 out:
 709         /* Insert read buffer */
 710         update_result->our_rc = ptlrpc_status_hton(rc);
 711         reply->ourp_lens[index] = cfs_size_round(update_result->our_datalen +
 712                                                  sizeof(*update_result));
 713         RETURN(rc);
 714 }
 715
 716 static int out_noop(struct tgt_session_info *tsi)
 717 {
 718         return 0;
 719 }
 720
 721 #define DEF_OUT_HNDL(opc, name, flags, fn)     \
 722 [opc - OUT_CREATE] = {                                  \
 723         .th_name    = name,                             \
 724         .th_fail_id = 0,                                \
 725         .th_opc     = opc,                              \
 726         .th_flags   = flags,                            \
 727         .th_act     = fn,                               \
 728         .th_fmt     = NULL,                             \
 729         .th_version = 0,                                \
 730 }
 731
 732 static struct tgt_handler out_update_ops[] = {
 733         DEF_OUT_HNDL(OUT_CREATE, "out_create", MUTABOR | HABEO_REFERO,
 734                      out_create),
 735         DEF_OUT_HNDL(OUT_DESTROY, "out_create", MUTABOR | HABEO_REFERO,
 736                      out_destroy),
 737         DEF_OUT_HNDL(OUT_REF_ADD, "out_ref_add", MUTABOR | HABEO_REFERO,
 738                      out_ref_add),
 739         DEF_OUT_HNDL(OUT_REF_DEL, "out_ref_del", MUTABOR | HABEO_REFERO,
 740                      out_ref_del),
 741         DEF_OUT_HNDL(OUT_ATTR_SET, "out_attr_set",  MUTABOR | HABEO_REFERO,
 742                      out_attr_set),
 743         DEF_OUT_HNDL(OUT_ATTR_GET, "out_attr_get",  HABEO_REFERO,
 744                      out_attr_get),
 745         DEF_OUT_HNDL(OUT_XATTR_SET, "out_xattr_set", MUTABOR | HABEO_REFERO,
 746                      out_xattr_set),
 747         DEF_OUT_HNDL(OUT_XATTR_DEL, "out_xattr_del", MUTABOR | HABEO_REFERO,
 748                      out_xattr_del),
 749         DEF_OUT_HNDL(OUT_XATTR_GET, "out_xattr_get", HABEO_REFERO,
 750                      out_xattr_get),
 751         DEF_OUT_HNDL(OUT_INDEX_LOOKUP, "out_index_lookup", HABEO_REFERO,
 752                      out_index_lookup),
 753         DEF_OUT_HNDL(OUT_INDEX_INSERT, "out_index_insert",
 754                      MUTABOR | HABEO_REFERO, out_index_insert),
 755         DEF_OUT_HNDL(OUT_INDEX_DELETE, "out_index_delete",
 756                      MUTABOR | HABEO_REFERO, out_index_delete),
 757         DEF_OUT_HNDL(OUT_WRITE, "out_write", MUTABOR | HABEO_REFERO, out_write),
 758         DEF_OUT_HNDL(OUT_READ, "out_read", HABEO_REFERO, out_read),
 759         DEF_OUT_HNDL(OUT_NOOP, "out_noop", HABEO_REFERO, out_noop),
 760 };
 761
 762 static struct tgt_handler *out_handler_find(__u32 opc)
 763 {
 764         struct tgt_handler *h;
 765
 766         h = NULL;
 767         if (OUT_CREATE <= opc && opc < OUT_LAST) {
 768                 h = &out_update_ops[opc - OUT_CREATE];
 769                 LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
 770                          h->th_opc, opc);
 771         } else {
 772                 h = NULL; /* unsupported opc */
 773         }
 774         return h;
 775 }
 776
 777 static int out_tx_start(const struct lu_env *env, struct dt_device *dt,
 778                         struct thandle_exec_args *ta, struct obd_export *exp)
 779 {
 780         ta->ta_argno = 0;
 781         ta->ta_handle = dt_trans_create(env, dt);
 782         if (IS_ERR(ta->ta_handle)) {
 783                 int rc;
 784
 785                 rc = PTR_ERR(ta->ta_handle);
 786                 ta->ta_handle = NULL;
 787                 CERROR("%s: start handle error: rc = %d\n", dt_obd_name(dt),
 788                        rc);
 789                 return rc;
 790         }
 791         if (exp->exp_need_sync)
 792                 ta->ta_handle->th_sync = 1;
 793
 794         return 0;
 795 }
 796
 797 static int out_trans_start(const struct lu_env *env,
 798                            struct thandle_exec_args *ta)
 799 {
 800         return dt_trans_start(env, ta->ta_handle->th_dev, ta->ta_handle);
 801 }
 802
 803 static int out_trans_stop(const struct lu_env *env,
 804                           struct thandle_exec_args *ta, int err)
 805 {
 806         int i;
 807         int rc;
 808
 809         ta->ta_handle->th_result = err;
 810         rc = dt_trans_stop(env, ta->ta_handle->th_dev, ta->ta_handle);
 811         for (i = 0; i < ta->ta_argno; i++) {
 812                 if (ta->ta_args[i]->object != NULL) {
 813                         struct dt_object *obj = ta->ta_args[i]->object;
 814
 815                         /* If the object is being created during this
 816                          * transaction, we need to remove them from the
 817                          * cache immediately, because a few layers are
 818                          * missing in OUT handler, i.e. the object might
 819                          * not be initialized in all layers */
 820                         if (ta->ta_args[i]->exec_fn == out_tx_create_exec)
 821                                 set_bit(LU_OBJECT_HEARD_BANSHEE,
 822                                         &obj->do_lu.lo_header->loh_flags);
 823                         dt_object_put(env, ta->ta_args[i]->object);
 824                         ta->ta_args[i]->object = NULL;
 825                 }
 826         }
 827         ta->ta_handle = NULL;
 828         ta->ta_argno = 0;
 829
 830         return rc;
 831 }
 832
 833 static int out_tx_end(const struct lu_env *env, struct thandle_exec_args *ta,
 834                       int declare_ret)
 835 {
 836         struct tgt_session_info *tsi = tgt_ses_info(env);
 837         int                     i;
 838         int                     rc;
 839         int                     rc1;
 840         ENTRY;
 841
 842         if (ta->ta_handle == NULL)
 843                 RETURN(0);
 844
 845         if (declare_ret != 0 || ta->ta_argno == 0)
 846                 GOTO(stop, rc = declare_ret);
 847
 848         LASSERT(ta->ta_handle->th_dev != NULL);
 849         rc = out_trans_start(env, ta);
 850         if (unlikely(rc != 0))
 851                 GOTO(stop, rc);
 852
 853         for (i = 0; i < ta->ta_argno; i++) {
 854                 rc = ta->ta_args[i]->exec_fn(env, ta->ta_handle,
 855                                              ta->ta_args[i]);
 856                 if (unlikely(rc != 0)) {
 857                         CDEBUG(D_INFO, "error during execution of #%u from"
 858                                " %s:%d: rc = %d\n", i, ta->ta_args[i]->file,
 859                                ta->ta_args[i]->line, rc);
 860                         while (--i >= 0) {
 861                                 if (ta->ta_args[i]->undo_fn != NULL)
 862                                         ta->ta_args[i]->undo_fn(env,
 863                                                                ta->ta_handle,
 864                                                                ta->ta_args[i]);
 865                                 else
 866                                         CERROR("%s: undo for %s:%d: rc = %d\n",
 867                                              dt_obd_name(ta->ta_handle->th_dev),
 868                                                ta->ta_args[i]->file,
 869                                                ta->ta_args[i]->line, -ENOTSUPP);
 870                         }
 871                         break;
 872                 }
 873                 CDEBUG(D_INFO, "%s: executed %u/%u: rc = %d\n",
 874                        dt_obd_name(ta->ta_handle->th_dev), i, ta->ta_argno, rc);
 875         }
 876
 877         /* Only fail for real updates, XXX right now llog updates will be
 878         * ignore, whose updates count is usually 1, so failover test
 879         * case will spot this FAIL_UPDATE_NET_REP precisely, and it will
 880         * be removed after async update patch is landed. */
 881         if (ta->ta_argno > 1)
 882                 tsi->tsi_reply_fail_id = OBD_FAIL_OUT_UPDATE_NET_REP;
 883
 884 stop:
 885         rc1 = out_trans_stop(env, ta, rc);
 886         if (rc == 0)
 887                 rc = rc1;
 888
 889         ta->ta_handle = NULL;
 890         ta->ta_argno = 0;
 891
 892         RETURN(rc);
 893 }
 894
 895 /**
 896  * Object updates between Targets. Because all the updates has been
 897  * dis-assemblied into object updates at sender side, so OUT will
 898  * call OSD API directly to execute these updates.
 899  *
 900  * In DNE phase I all of the updates in the request need to be executed
 901  * in one transaction, and the transaction has to be synchronously.
 902  *
 903  * Please refer to lustre/include/lustre/lustre_idl.h for req/reply
 904  * format.
 905  */
 906 int out_handle(struct tgt_session_info *tsi)
 907 {
 908         const struct lu_env             *env = tsi->tsi_env;
 909         struct tgt_thread_info          *tti = tgt_th_info(env);
 910         struct thandle_exec_args        *ta = &tti->tti_tea;
 911         struct req_capsule              *pill = tsi->tsi_pill;
 912         struct dt_device                *dt = tsi->tsi_tgt->lut_bottom;
 913         struct out_update_header        *ouh;
 914         struct out_update_buffer        *oub = NULL;
 915         struct object_update            *update;
 916         struct object_update_reply      *reply;
 917         struct ptlrpc_bulk_desc         *desc = NULL;
 918         struct l_wait_info              lwi;
 919         void                            **update_bufs;
 920         int                             current_batchid = -1;
 921         __u32                           update_buf_count;
 922         unsigned int                    i;
 923         unsigned int                    reply_index = 0;
 924         int                             rc = 0;
 925         int                             rc1 = 0;
 926         int                             ouh_size, reply_size;
 927         int                             updates;
 928         ENTRY;
 929
 930         req_capsule_set(pill, &RQF_OUT_UPDATE);
 931         ouh_size = req_capsule_get_size(pill, &RMF_OUT_UPDATE_HEADER,
 932                                         RCL_CLIENT);
 933         if (ouh_size <= 0)
 934                 RETURN(err_serious(-EPROTO));
 935
 936         ouh = req_capsule_client_get(pill, &RMF_OUT_UPDATE_HEADER);
 937         if (ouh == NULL)
 938                 RETURN(err_serious(-EPROTO));
 939
 940         if (ouh->ouh_magic != OUT_UPDATE_HEADER_MAGIC) {
 941                 CERROR("%s: invalid update buffer magic %x expect %x: "
 942                        "rc = %d\n", tgt_name(tsi->tsi_tgt), ouh->ouh_magic,
 943                        UPDATE_REQUEST_MAGIC, -EPROTO);
 944                 RETURN(err_serious(-EPROTO));
 945         }
 946
 947         update_buf_count = ouh->ouh_count;
 948         if (update_buf_count == 0)
 949                 RETURN(err_serious(-EPROTO));
 950
 951         OBD_ALLOC(update_bufs, sizeof(*update_bufs) * update_buf_count);
 952         if (update_bufs == NULL)
 953                 RETURN(err_serious(-ENOMEM));
 954
 955         if (ouh->ouh_inline_length > 0) {
 956                 update_bufs[0] = ouh->ouh_inline_data;
 957         } else {
 958                 struct out_update_buffer *tmp;
 959
 960                 oub = req_capsule_client_get(pill, &RMF_OUT_UPDATE_BUF);
 961                 if (oub == NULL)
 962                         GOTO(out_free, rc = err_serious(-EPROTO));
 963
 964                 desc = ptlrpc_prep_bulk_exp(pill->rc_req, update_buf_count,
 965                                             PTLRPC_BULK_OPS_COUNT,
 966                                             PTLRPC_BULK_GET_SINK |
 967                                             PTLRPC_BULK_BUF_KVEC,
 968                                             MDS_BULK_PORTAL,
 969                                             &ptlrpc_bulk_kvec_ops);
 970                 if (desc == NULL)
 971                         GOTO(out_free, rc = err_serious(-ENOMEM));
 972
 973                 tmp = oub;
 974                 for (i = 0; i < update_buf_count; i++, tmp++) {
 975                         if (tmp->oub_size >= OUT_MAXREQSIZE)
 976                                 GOTO(out_free, rc = err_serious(-EPROTO));
 977
 978                         OBD_ALLOC(update_bufs[i], tmp->oub_size);
 979                         if (update_bufs[i] == NULL)
 980                                 GOTO(out_free, rc = err_serious(-ENOMEM));
 981
 982                         desc->bd_frag_ops->add_iov_frag(desc, update_bufs[i],
 983                                                         tmp->oub_size);
 984                 }
 985
 986                 pill->rc_req->rq_bulk_write = 1;
 987                 rc = sptlrpc_svc_prep_bulk(pill->rc_req, desc);
 988                 if (rc != 0)
 989                         GOTO(out_free, rc = err_serious(rc));
 990
 991                 rc = target_bulk_io(pill->rc_req->rq_export, desc, &lwi);
 992                 if (rc < 0)
 993                         GOTO(out_free, rc = err_serious(rc));
 994         }
 995         /* validate the request and calculate the total update count and
 996          * set it to reply */
 997         reply_size = 0;
 998         updates = 0;
 999         for (i = 0; i < update_buf_count; i++) {
1000                 struct object_update_request    *our;
1001                 int                              j;
1002
1003                 our = update_bufs[i];
1004                 if (ptlrpc_req_need_swab(pill->rc_req))
1005                         lustre_swab_object_update_request(our);
1006
1007                 if (our->ourq_magic != UPDATE_REQUEST_MAGIC) {
1008                         CERROR("%s: invalid update buffer magic %x"
1009                                " expect %x: rc = %d\n",
1010                                tgt_name(tsi->tsi_tgt), our->ourq_magic,
1011                                UPDATE_REQUEST_MAGIC, -EPROTO);
1012                         GOTO(out_free, rc = err_serious(-EPROTO));
1013                 }
1014                 updates += our->ourq_count;
1015
1016                 /* need to calculate reply size */
1017                 for (j = 0; j < our->ourq_count; j++) {
1018                         update = object_update_request_get(our, j, NULL);
1019                         if (update == NULL)
1020                                 GOTO(out, rc = err_serious(-EPROTO));
1021                         if (ptlrpc_req_need_swab(pill->rc_req))
1022                                 lustre_swab_object_update(update);
1023
1024                         if (!fid_is_sane(&update->ou_fid)) {
1025                                 CERROR("%s: invalid FID "DFID": rc = %d\n",
1026                                        tgt_name(tsi->tsi_tgt),
1027                                        PFID(&update->ou_fid), -EPROTO);
1028                                 GOTO(out, rc = err_serious(-EPROTO));
1029                         }
1030
1031                         /* XXX: what ou_result_size can be considered safe? */
1032
1033                         reply_size += sizeof(reply->ourp_lens[0]);
1034                         reply_size += sizeof(struct object_update_result);
1035                         reply_size += update->ou_result_size;
1036                 }
1037         }
1038         reply_size += sizeof(*reply);
1039
1040         if (unlikely(reply_size > ouh->ouh_reply_size)) {
1041                 CERROR("%s: too small reply buf %u for %u, need %u at least\n",
1042                        tgt_name(tsi->tsi_tgt), ouh->ouh_reply_size,
1043                        updates, reply_size);
1044                 GOTO(out_free, rc = err_serious(-EPROTO));
1045         }
1046
1047         req_capsule_set_size(pill, &RMF_OUT_UPDATE_REPLY, RCL_SERVER,
1048                              ouh->ouh_reply_size);
1049         rc = req_capsule_server_pack(pill);
1050         if (rc != 0) {
1051                 CERROR("%s: Can't pack response: rc = %d\n",
1052                        tgt_name(tsi->tsi_tgt), rc);
1053                 GOTO(out_free, rc = err_serious(-EPROTO));
1054         }
1055
1056         /* Prepare the update reply buffer */
1057         reply = req_capsule_server_get(pill, &RMF_OUT_UPDATE_REPLY);
1058         if (reply == NULL)
1059                 GOTO(out_free, rc = -EPROTO);
1060         reply->ourp_magic = UPDATE_REPLY_MAGIC;
1061         reply->ourp_count = updates;
1062         tti->tti_u.update.tti_update_reply = reply;
1063         tti->tti_mult_trans = !req_is_replay(tgt_ses_req(tsi));
1064
1065         /* Walk through updates in the request to execute them */
1066         for (i = 0; i < update_buf_count; i++) {
1067                 struct tgt_handler      *h;
1068                 struct dt_object        *dt_obj;
1069                 int                     update_count;
1070                 struct object_update_request *our;
1071                 int                     j;
1072
1073                 our = update_bufs[i];
1074                 update_count = our->ourq_count;
1075                 for (j = 0; j < update_count; j++) {
1076                         struct lu_object_conf conf;
1077
1078                         update = object_update_request_get(our, j, NULL);
1079                         if (update->ou_type == OUT_CREATE)
1080                                 conf.loc_flags = LOC_F_NEW;
1081                         else
1082                                 conf.loc_flags = 0;
1083
1084                         dt_obj = dt_locate_at(env, dt, &update->ou_fid,
1085                                 dt->dd_lu_dev.ld_site->ls_top_dev, &conf);
1086                         if (IS_ERR(dt_obj))
1087                                 GOTO(out, rc = PTR_ERR(dt_obj));
1088
1089                         if (dt->dd_record_fid_accessed) {
1090                                 struct lfsck_req_local *lrl = &tti->tti_lrl;
1091
1092                                 lfsck_pack_rfa(lrl,
1093                                                lu_object_fid(&dt_obj->do_lu),
1094                                                LEL_FID_ACCESSED,
1095                                                LFSCK_TYPE_LAYOUT);
1096                                 tgt_lfsck_in_notify_local(env, dt, lrl, NULL);
1097                         }
1098
1099                         tti->tti_u.update.tti_dt_object = dt_obj;
1100                         tti->tti_u.update.tti_update = update;
1101                         tti->tti_u.update.tti_update_reply_index = reply_index;
1102
1103                         h = out_handler_find(update->ou_type);
1104                         if (unlikely(h == NULL)) {
1105                                 CERROR("%s: unsupported opc: 0x%x\n",
1106                                        tgt_name(tsi->tsi_tgt), update->ou_type);
1107                                 GOTO(next, rc = -ENOTSUPP);
1108                         }
1109
1110                         /* Check resend case only for modifying RPC */
1111                         if (h->th_flags & MUTABOR) {
1112                                 struct ptlrpc_request *req = tgt_ses_req(tsi);
1113
1114                                 if (out_check_resent(env, dt, dt_obj, req,
1115                                                      out_reconstruct, reply,
1116                                                      reply_index))
1117                                         GOTO(next, rc = 0);
1118
1119                                 if (dt->dd_rdonly)
1120                                         GOTO(next, rc = -EROFS);
1121                         }
1122
1123                         /* start transaction for modification RPC only */
1124                         if (h->th_flags & MUTABOR && current_batchid == -1) {
1125                                 current_batchid = update->ou_batchid;
1126                                 rc = out_tx_start(env, dt, ta, tsi->tsi_exp);
1127                                 if (rc != 0)
1128                                         GOTO(next, rc);
1129
1130                                 if (update->ou_flags & UPDATE_FL_SYNC)
1131                                         ta->ta_handle->th_sync = 1;
1132                         }
1133
1134                         /* Stop the current update transaction, if the update
1135                          * has different batchid, or read-only update */
1136                         if (((current_batchid != update->ou_batchid) ||
1137                              !(h->th_flags & MUTABOR)) &&
1138                              ta->ta_handle != NULL) {
1139                                 rc = out_tx_end(env, ta, rc);
1140                                 current_batchid = -1;
1141                                 if (rc != 0)
1142                                         GOTO(next, rc);
1143
1144                                 /* start a new transaction if needed */
1145                                 if (h->th_flags & MUTABOR) {
1146                                         rc = out_tx_start(env, dt, ta,
1147                                                           tsi->tsi_exp);
1148                                         if (rc != 0)
1149                                                 GOTO(next, rc);
1150                                         if (update->ou_flags & UPDATE_FL_SYNC)
1151                                                 ta->ta_handle->th_sync = 1;
1152                                         current_batchid = update->ou_batchid;
1153                                 }
1154                         }
1155
1156                         rc = h->th_act(tsi);
1157 next:
1158                         reply_index++;
1159                         dt_object_put(env, dt_obj);
1160                         if (rc < 0)
1161                                 GOTO(out, rc);
1162                 }
1163         }
1164 out:
1165         if (current_batchid != -1) {
1166                 rc1 = out_tx_end(env, ta, rc);
1167                 if (rc == 0)
1168                         rc = rc1;
1169         }
1170
1171 out_free:
1172         if (update_bufs != NULL) {
1173                 if (oub != NULL) {
1174                         for (i = 0; i < update_buf_count; i++, oub++) {
1175                                 if (update_bufs[i] != NULL)
1176                                         OBD_FREE(update_bufs[i], oub->oub_size);
1177                         }
1178                 }
1179
1180                 OBD_FREE(update_bufs, sizeof(*update_bufs) * update_buf_count);
1181         }
1182
1183         if (desc != NULL)
1184                 ptlrpc_free_bulk(desc);
1185
1186         RETURN(rc);
1187 }
1188
1189 struct tgt_handler tgt_out_handlers[] = {
1190 TGT_UPDATE_HDL(MUTABOR, OUT_UPDATE,     out_handle),
1191 };
1192 EXPORT_SYMBOL(tgt_out_handlers);
1193