lustre/include/lustre_update.h

   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.htm
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2013, 2014, Intel Corporation.
  24  */
  25 /*
  26  * lustre/include/lustre_update.h
  27  *
  28  * Author: Di Wang <di.wang@intel.com>
  29  */
  30
  31 #ifndef _LUSTRE_UPDATE_H
  32 #define _LUSTRE_UPDATE_H
  33 #include <lustre_net.h>
  34 #include <dt_object.h>
  35
  36 #define OUT_UPDATE_INIT_BUFFER_SIZE     4096
  37 /* 16KB, the current biggest size is llog header(8KB) */
  38 #define OUT_UPDATE_REPLY_SIZE           16384
  39
  40 struct dt_key;
  41 struct dt_rec;
  42 struct object_update_param;
  43
  44 struct update_buffer {
  45         struct object_update_request    *ub_req;
  46         size_t                          ub_req_size;
  47 };
  48
  49 /**
  50  * Tracking the updates being executed on this dt_device.
  51  */
  52 struct dt_update_request {
  53         struct dt_device                *dur_dt;
  54         /* attached itself to thandle */
  55         int                             dur_flags;
  56         /* update request result */
  57         int                             dur_rc;
  58         /* Current batch(transaction) id */
  59         __u64                           dur_batchid;
  60         /* Holding object updates */
  61         struct update_buffer            dur_buf;
  62         struct list_head                dur_cb_items;
  63 };
  64
  65 struct update_params {
  66         struct object_update_param      up_params[0];
  67 };
  68
  69 static inline size_t update_params_size(const struct update_params *params,
  70                                         unsigned int param_count)
  71 {
  72         struct object_update_param      *param;
  73         size_t total_size = sizeof(*params);
  74         unsigned int i;
  75
  76         param = (struct object_update_param *)&params->up_params[0];
  77         for (i = 0; i < param_count; i++) {
  78                 size_t size = object_update_param_size(param);
  79
  80                 param = (struct object_update_param *)((char *)param + size);
  81                 total_size += size;
  82         }
  83
  84         return total_size;
  85 }
  86
  87 static inline struct object_update_param *
  88 update_params_get_param(const struct update_params *params,
  89                         unsigned int index, unsigned int param_count)
  90 {
  91         struct object_update_param *param;
  92         unsigned int            i;
  93
  94         if (index > param_count)
  95                 return NULL;
  96
  97         param = (struct object_update_param *)&params->up_params[0];
  98         for (i = 0; i < index; i++)
  99                 param = (struct object_update_param *)((char *)param +
 100                         object_update_param_size(param));
 101
 102         return param;
 103 }
 104
 105 static inline void*
 106 update_params_get_param_buf(const struct update_params *params, __u16 index,
 107                             unsigned int param_count, __u16 *size)
 108 {
 109         struct object_update_param *param;
 110
 111         param = update_params_get_param(params, (unsigned int)index,
 112                                         param_count);
 113         if (param == NULL)
 114                 return NULL;
 115
 116         if (size != NULL)
 117                 *size = param->oup_len;
 118
 119         return &param->oup_buf[0];
 120 }
 121
 122 struct update_op {
 123         struct lu_fid uop_fid;
 124         __u16   uop_type;
 125         __u16   uop_param_count;
 126         __u16   uop_params_off[0];
 127 };
 128
 129 static inline size_t
 130 update_op_size(unsigned int param_count)
 131 {
 132         return offsetof(struct update_op, uop_params_off[param_count]);
 133 }
 134
 135 static inline struct update_op *
 136 update_op_next_op(const struct update_op *uop)
 137 {
 138         return (struct update_op *)((char *)uop +
 139                                 update_op_size(uop->uop_param_count));
 140 }
 141
 142 /* All of updates in the mulitple_update_record */
 143 struct update_ops {
 144         struct update_op        uops_op[0];
 145 };
 146
 147 static inline size_t update_ops_size(const struct update_ops *ops,
 148                                      unsigned int update_count)
 149 {
 150         struct update_op *op;
 151         size_t total_size = sizeof(*ops);
 152         unsigned int i;
 153
 154         op = (struct update_op *)&ops->uops_op[0];
 155         for (i = 0; i < update_count; i++, op = update_op_next_op(op))
 156                 total_size += update_op_size(op->uop_param_count);
 157
 158         return total_size;
 159 }
 160
 161 /*
 162  * This is the update record format used to store the updates in
 163  * disk. All updates of the operation will be stored in ur_ops.
 164  * All of parameters for updates of the operation will be stored
 165  * in ur_params.
 166  * To save the space of the record, parameters in ur_ops will only
 167  * remember their offset in ur_params, so to avoid storing duplicate
 168  * parameters in ur_params, which can help us save a lot space for
 169  * operation like creating striped directory.
 170  */
 171 struct update_records {
 172         __u64                   ur_master_transno;
 173         __u64                   ur_batchid;
 174         __u32                   ur_flags;
 175         __u32                   ur_param_count;
 176         __u32                   ur_update_count;
 177         struct update_ops       ur_ops;
 178          /* Note ur_ops has a variable size, so comment out
 179           * the following ur_params, in case some use it directly
 180           * update_records->ur_params
 181           *
 182           * struct update_params        ur_params;
 183           */
 184 };
 185
 186 struct llog_update_record {
 187         struct llog_rec_hdr     lur_hdr;
 188         struct update_records   lur_update_rec;
 189         /* Note ur_update_rec has a variable size, so comment out
 190          * the following ur_tail, in case someone use it directly
 191          *
 192          * struct llog_rec_tail lur_tail;
 193          */
 194 };
 195
 196 static inline struct update_params *
 197 update_records_get_params(const struct update_records *record)
 198 {
 199         return (struct update_params *)((char *)record +
 200                 offsetof(struct update_records, ur_ops) +
 201                 update_ops_size(&record->ur_ops, record->ur_update_count));
 202 }
 203
 204 static inline size_t
 205 update_records_size(const struct update_records *record)
 206 {
 207         struct update_params *params;
 208
 209         params = update_records_get_params(record);
 210
 211         return cfs_size_round(offsetof(struct update_records, ur_ops) +
 212                update_ops_size(&record->ur_ops, record->ur_update_count) +
 213                update_params_size(params, record->ur_param_count));
 214 }
 215
 216 static inline size_t
 217 llog_update_record_size(const struct llog_update_record *lur)
 218 {
 219         return cfs_size_round(sizeof(lur->lur_hdr) +
 220                               update_records_size(&lur->lur_update_rec) +
 221                               sizeof(struct llog_rec_tail));
 222 }
 223
 224 static inline struct update_op *
 225 update_ops_get_op(const struct update_ops *ops, unsigned int index,
 226                   unsigned int update_count)
 227 {
 228         struct update_op *op;
 229         unsigned int i;
 230
 231         if (index > update_count)
 232                 return NULL;
 233
 234         op = (struct update_op *)&ops->uops_op[0];
 235         for (i = 0; i < index; i++)
 236                 op = update_op_next_op(op);
 237
 238         return op;
 239 }
 240
 241 static inline void
 242 *object_update_param_get(const struct object_update *update, size_t index,
 243                          size_t *size)
 244 {
 245         const struct    object_update_param *param;
 246         size_t          i;
 247
 248         if (index >= update->ou_params_count)
 249                 return ERR_PTR(-EINVAL);
 250
 251         param = &update->ou_params[0];
 252         for (i = 0; i < index; i++)
 253                 param = (struct object_update_param *)((char *)param +
 254                         object_update_param_size(param));
 255
 256         if (size != NULL)
 257                 *size = param->oup_len;
 258
 259         if (param->oup_len == 0)
 260                 return NULL;
 261
 262         return (void *)&param->oup_buf[0];
 263 }
 264
 265 static inline unsigned long
 266 object_update_request_size(const struct object_update_request *our)
 267 {
 268         unsigned long   size;
 269         size_t          i = 0;
 270
 271         size = offsetof(struct object_update_request, ourq_updates[0]);
 272         for (i = 0; i < our->ourq_count; i++) {
 273                 struct object_update *update;
 274
 275                 update = (struct object_update *)((char *)our + size);
 276                 size += object_update_size(update);
 277         }
 278         return size;
 279 }
 280
 281 static inline void
 282 object_update_reply_init(struct object_update_reply *reply, size_t count)
 283 {
 284         reply->ourp_magic = UPDATE_REPLY_MAGIC;
 285         reply->ourp_count = count;
 286 }
 287
 288 static inline void
 289 object_update_result_insert(struct object_update_reply *reply,
 290                             void *data, size_t data_len, size_t index,
 291                             int rc)
 292 {
 293         struct object_update_result *update_result;
 294         char *ptr;
 295
 296         update_result = object_update_result_get(reply, index, NULL);
 297         LASSERT(update_result != NULL);
 298
 299         update_result->our_rc = ptlrpc_status_hton(rc);
 300         if (data_len > 0) {
 301                 LASSERT(data != NULL);
 302                 ptr = (char *)update_result +
 303                         cfs_size_round(sizeof(struct object_update_reply));
 304                 update_result->our_datalen = data_len;
 305                 memcpy(ptr, data, data_len);
 306         }
 307
 308         reply->ourp_lens[index] = cfs_size_round(data_len +
 309                                         sizeof(struct object_update_result));
 310 }
 311
 312 static inline int
 313 object_update_result_data_get(const struct object_update_reply *reply,
 314                               struct lu_buf *lbuf, size_t index)
 315 {
 316         struct object_update_result *update_result;
 317         size_t size = 0;
 318         int    result;
 319
 320         LASSERT(lbuf != NULL);
 321         update_result = object_update_result_get(reply, index, &size);
 322         if (update_result == NULL ||
 323             size < cfs_size_round(sizeof(struct object_update_reply)) ||
 324             update_result->our_datalen > size)
 325                 RETURN(-EFAULT);
 326
 327         result = ptlrpc_status_ntoh(update_result->our_rc);
 328         if (result < 0)
 329                 return result;
 330
 331         lbuf->lb_buf = update_result->our_data;
 332         lbuf->lb_len = update_result->our_datalen;
 333
 334         return 0;
 335 }
 336
 337 /**
 338  * Attached in the thandle to record the updates for distribute
 339  * distribution.
 340  */
 341 struct thandle_update_records {
 342         /* All of updates for the cross-MDT operation. */
 343         struct llog_update_record       *tur_update_records;
 344         size_t                          tur_update_records_buf_size;
 345
 346         /* All of parameters for the cross-MDT operation */
 347         struct update_params    *tur_update_params;
 348         unsigned int            tur_update_param_count;
 349         size_t                  tur_update_params_buf_size;
 350 };
 351
 352 #define TOP_THANDLE_MAGIC       0x20140917
 353 struct top_multiple_thandle {
 354         struct dt_device        *tmt_master_sub_dt;
 355         atomic_t                tmt_refcount;
 356         /* Other sub transactions will be listed here. */
 357         struct list_head        tmt_sub_thandle_list;
 358
 359         struct list_head        tmt_commit_list;
 360         /* All of update records will packed here */
 361         struct thandle_update_records *tmt_update_records;
 362
 363         __u64                   tmt_batchid;
 364         int                     tmt_result;
 365         __u32                   tmt_magic;
 366         __u32                   tmt_committed:1;
 367 };
 368
 369 /* {top,sub}_thandle are used to manage distributed transactions which
 370  * include updates on several nodes. A top_handle represents the
 371  * whole operation, and sub_thandle represents updates on each node. */
 372 struct top_thandle {
 373         struct thandle          tt_super;
 374         /* The master sub transaction. */
 375         struct thandle          *tt_master_sub_thandle;
 376
 377         struct top_multiple_thandle *tt_multiple_thandle;
 378 };
 379
 380 /* Sub thandle is used to track multiple sub thandles under one parent
 381  * thandle */
 382 struct sub_thandle {
 383         struct thandle          *st_sub_th;
 384         struct dt_device        *st_dt;
 385         struct list_head        st_list;
 386         struct llog_cookie      st_cookie;
 387         struct dt_txn_commit_cb st_commit_dcb;
 388         int                     st_result;
 389
 390         /* linked to top_thandle */
 391         struct list_head        st_sub_list;
 392
 393         /* If this sub thandle is committed */
 394         bool                    st_committed:1;
 395 };
 396
 397 struct tx_arg;
 398 typedef int (*tx_exec_func_t)(const struct lu_env *env, struct thandle *th,
 399                               struct tx_arg *ta);
 400
 401 /* Structure for holding one update executation */
 402 struct tx_arg {
 403         tx_exec_func_t           exec_fn;
 404         tx_exec_func_t           undo_fn;
 405         struct dt_object        *object;
 406         const char              *file;
 407         struct object_update_reply *reply;
 408         int                      line;
 409         int                      index;
 410         union {
 411                 struct {
 412                         struct dt_insert_rec     rec;
 413                         const struct dt_key     *key;
 414                 } insert;
 415                 struct {
 416                 } ref;
 417                 struct {
 418                         struct lu_attr   attr;
 419                 } attr_set;
 420                 struct {
 421                         struct lu_buf    buf;
 422                         const char      *name;
 423                         int              flags;
 424                         __u32            csum;
 425                 } xattr_set;
 426                 struct {
 427                         struct lu_attr                  attr;
 428                         struct dt_allocation_hint       hint;
 429                         struct dt_object_format         dof;
 430                         struct lu_fid                   fid;
 431                 } create;
 432                 struct {
 433                         struct lu_buf   buf;
 434                         loff_t          pos;
 435                 } write;
 436                 struct {
 437                         struct ost_body     *body;
 438                 } destroy;
 439         } u;
 440 };
 441
 442 /* Structure for holding all update executations of one transaction */
 443 struct thandle_exec_args {
 444         struct thandle          *ta_handle;
 445         int                     ta_argno;   /* used args */
 446         int                     ta_alloc_args; /* allocated args count */
 447         struct tx_arg           **ta_args;
 448 };
 449
 450 /* target/out_lib.c */
 451 int out_update_pack(const struct lu_env *env, struct object_update *update,
 452                     size_t max_update_size, enum update_type op,
 453                     const struct lu_fid *fid, unsigned int params_count,
 454                     __u16 *param_sizes, const void **param_bufs);
 455 int out_create_pack(const struct lu_env *env, struct object_update *update,
 456                     size_t max_update_size, const struct lu_fid *fid,
 457                     const struct lu_attr *attr, struct dt_allocation_hint *hint,
 458                     struct dt_object_format *dof);
 459 int out_object_destroy_pack(const struct lu_env *env,
 460                             struct object_update *update,
 461                             size_t max_update_size,
 462                             const struct lu_fid *fid);
 463 int out_index_delete_pack(const struct lu_env *env,
 464                           struct object_update *update, size_t max_update_size,
 465                           const struct lu_fid *fid, const struct dt_key *key);
 466 int out_index_insert_pack(const struct lu_env *env,
 467                           struct object_update *update, size_t max_update_size,
 468                           const struct lu_fid *fid, const struct dt_rec *rec,
 469                           const struct dt_key *key);
 470 int out_xattr_set_pack(const struct lu_env *env,
 471                        struct object_update *update, size_t max_update_size,
 472                        const struct lu_fid *fid, const struct lu_buf *buf,
 473                        const char *name, __u32 flag);
 474 int out_xattr_del_pack(const struct lu_env *env,
 475                        struct object_update *update, size_t max_update_size,
 476                        const struct lu_fid *fid, const char *name);
 477 int out_attr_set_pack(const struct lu_env *env,
 478                       struct object_update *update, size_t max_update_size,
 479                       const struct lu_fid *fid, const struct lu_attr *attr);
 480 int out_ref_add_pack(const struct lu_env *env,
 481                      struct object_update *update, size_t max_update_size,
 482                      const struct lu_fid *fid);
 483 int out_ref_del_pack(const struct lu_env *env,
 484                      struct object_update *update, size_t max_update_size,
 485                      const struct lu_fid *fid);
 486 int out_write_pack(const struct lu_env *env,
 487                    struct object_update *update, size_t max_update_size,
 488                    const struct lu_fid *fid, const struct lu_buf *buf,
 489                    __u64 pos);
 490 int out_attr_get_pack(const struct lu_env *env,
 491                       struct object_update *update, size_t max_update_size,
 492                       const struct lu_fid *fid);
 493 int out_index_lookup_pack(const struct lu_env *env,
 494                           struct object_update *update, size_t max_update_size,
 495                           const struct lu_fid *fid, struct dt_rec *rec,
 496                           const struct dt_key *key);
 497 int out_xattr_get_pack(const struct lu_env *env,
 498                        struct object_update *update, size_t max_update_size,
 499                        const struct lu_fid *fid, const char *name);
 500 int out_read_pack(const struct lu_env *env, struct object_update *update,
 501                   size_t max_update_length, const struct lu_fid *fid,
 502                   size_t size, loff_t pos);
 503
 504 const char *update_op_str(__u16 opcode);
 505
 506 /* target/update_trans.c */
 507 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
 508                                       struct thandle *th,
 509                                       struct dt_device *sub_dt);
 510
 511 static inline struct thandle *
 512 thandle_get_sub(const struct lu_env *env, struct thandle *th,
 513                  const struct dt_object *sub_obj)
 514 {
 515         return thandle_get_sub_by_dt(env, th, lu2dt_dev(sub_obj->do_lu.lo_dev));
 516 }
 517
 518 struct thandle *
 519 top_trans_create(const struct lu_env *env, struct dt_device *master_dev);
 520 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
 521                     struct thandle *th);
 522 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
 523                    struct thandle *th);
 524 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt);
 525
 526 static inline void top_multiple_thandle_get(struct top_multiple_thandle *tmt)
 527 {
 528         atomic_inc(&tmt->tmt_refcount);
 529 }
 530
 531 static inline void top_multiple_thandle_put(struct top_multiple_thandle *tmt)
 532 {
 533         if (atomic_dec_and_test(&tmt->tmt_refcount))
 534                 top_multiple_thandle_destroy(tmt);
 535 }
 536
 537 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
 538                                        struct dt_device *dt_dev);
 539 int sub_thandle_trans_create(const struct lu_env *env,
 540                              struct top_thandle *top_th,
 541                              struct sub_thandle *st);
 542
 543 /* update_records.c */
 544 int update_records_create_pack(const struct lu_env *env,
 545                                struct update_ops *ops,
 546                                unsigned int *op_count,
 547                                size_t *max_ops_size,
 548                                struct update_params *params,
 549                                unsigned int *param_count,
 550                                size_t *max_param_size,
 551                                const struct lu_fid *fid,
 552                                const struct lu_attr *attr,
 553                                const struct dt_allocation_hint *hint,
 554                                struct dt_object_format *dof);
 555 int update_records_attr_set_pack(const struct lu_env *env,
 556                                  struct update_ops *ops,
 557                                  unsigned int *op_count,
 558                                  size_t *max_ops_size,
 559                                  struct update_params *params,
 560                                  unsigned int *param_count,
 561                                  size_t *max_param_size,
 562                                  const struct lu_fid *fid,
 563                                  const struct lu_attr *attr);
 564 int update_records_ref_add_pack(const struct lu_env *env,
 565                                 struct update_ops *ops,
 566                                 unsigned int *op_count,
 567                                 size_t *max_ops_size,
 568                                 struct update_params *params,
 569                                 unsigned int *param_count,
 570                                 size_t *max_param_size,
 571                                 const struct lu_fid *fid);
 572 int update_records_ref_del_pack(const struct lu_env *env,
 573                                 struct update_ops *ops,
 574                                 unsigned int *op_count,
 575                                 size_t *max_ops_size,
 576                                 struct update_params *params,
 577                                 unsigned int *param_count,
 578                                 size_t *max_param_size,
 579                                 const struct lu_fid *fid);
 580 int update_records_object_destroy_pack(const struct lu_env *env,
 581                                        struct update_ops *ops,
 582                                        unsigned int *op_count,
 583                                        size_t *max_ops_size,
 584                                        struct update_params *params,
 585                                        unsigned int *param_count,
 586                                        size_t *max_param_size,
 587                                        const struct lu_fid *fid);
 588 int update_records_index_insert_pack(const struct lu_env *env,
 589                                      struct update_ops *ops,
 590                                      unsigned int *op_count,
 591                                      size_t *max_ops_size,
 592                                      struct update_params *params,
 593                                      unsigned int *param_count,
 594                                      size_t *max_param_size,
 595                                      const struct lu_fid *fid,
 596                                      const struct dt_rec *rec,
 597                                      const struct dt_key *key);
 598 int update_records_index_delete_pack(const struct lu_env *env,
 599                                      struct update_ops *ops,
 600                                      unsigned int *op_count,
 601                                      size_t *max_ops_size,
 602                                      struct update_params *params,
 603                                      unsigned int *param_count,
 604                                      size_t *max_param_size,
 605                                      const struct lu_fid *fid,
 606                                      const struct dt_key *key);
 607 int update_records_xattr_set_pack(const struct lu_env *env,
 608                                   struct update_ops *ops,
 609                                   unsigned int *op_count,
 610                                   size_t *max_ops_size,
 611                                   struct update_params *params,
 612                                   unsigned int *param_count,
 613                                   size_t *max_param_size,
 614                                   const struct lu_fid *fid,
 615                                   const struct lu_buf *buf, const char *name,
 616                                   __u32 flag);
 617 int update_records_xattr_del_pack(const struct lu_env *env,
 618                                   struct update_ops *ops,
 619                                   unsigned int *op_count,
 620                                   size_t *max_ops_size,
 621                                   struct update_params *params,
 622                                   unsigned int *param_count,
 623                                   size_t *max_param_size,
 624                                   const struct lu_fid *fid,
 625                                   const char *name);
 626 int update_records_write_pack(const struct lu_env *env,
 627                               struct update_ops *ops,
 628                               unsigned int *op_count,
 629                               size_t *max_ops_size,
 630                               struct update_params *params,
 631                               unsigned int *param_count,
 632                               size_t *max_param_size,
 633                               const struct lu_fid *fid,
 634                               const struct lu_buf *buf,
 635                               __u64 pos);
 636 int update_records_punch_pack(const struct lu_env *env,
 637                               struct update_ops *ops,
 638                               unsigned int *op_count,
 639                               size_t *max_ops_size,
 640                               struct update_params *params,
 641                               unsigned int *param_count,
 642                               size_t *max_param_size,
 643                               const struct lu_fid *fid,
 644                               __u64 start, __u64 end);
 645
 646 int tur_update_records_extend(struct thandle_update_records *tur,
 647                               size_t new_size);
 648 int tur_update_params_extend(struct thandle_update_records *tur,
 649                              size_t new_size);
 650 int tur_update_extend(struct thandle_update_records *tur,
 651                       size_t new_op_size, size_t new_param_size);
 652
 653 #define update_record_pack(name, th, ...)                               \
 654 ({                                                                      \
 655         struct top_thandle *top_th;                                     \
 656         struct top_multiple_thandle *tmt;                               \
 657         struct thandle_update_records *tur;                             \
 658         struct llog_update_record     *lur;                             \
 659         size_t          avail_param_size;                               \
 660         size_t          avail_op_size;                                  \
 661         int             ret;                                            \
 662                                                                         \
 663         while (1) {                                                     \
 664                 top_th = container_of(th, struct top_thandle, tt_super);\
 665                 tmt = top_th->tt_multiple_thandle;                      \
 666                 tur = tmt->tmt_update_records;                          \
 667                 lur = tur->tur_update_records;                          \
 668                 avail_param_size = tur->tur_update_params_buf_size -    \
 669                              update_params_size(tur->tur_update_params, \
 670                                         tur->tur_update_param_count);   \
 671                 avail_op_size = tur->tur_update_records_buf_size -      \
 672                                 llog_update_record_size(lur);           \
 673                 ret = update_records_##name##_pack(env,                 \
 674                                           &lur->lur_update_rec.ur_ops,  \
 675                                   &lur->lur_update_rec.ur_update_count, \
 676                                   &avail_op_size,                       \
 677                                   tur->tur_update_params,               \
 678                                   &tur->tur_update_param_count,         \
 679                                   &avail_param_size, __VA_ARGS__);      \
 680                 if (ret == -E2BIG) {                                    \
 681                         ret = tur_update_extend(tur, avail_op_size,     \
 682                                                    avail_param_size);   \
 683                         if (ret != 0)                                   \
 684                                 break;                                  \
 685                         continue;                                       \
 686                 } else {                                                \
 687                         break;                                          \
 688                 }                                                       \
 689         }                                                               \
 690         ret;                                                            \
 691 })
 692 #endif