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, 2017, 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 <dt_object.h>
  34 #include <lustre_net.h>
  35 #include <obj_update.h>
  36
  37 #define OUT_UPDATE_REPLY_SIZE           4096
  38 #define OUT_BULK_BUFFER_SIZE            4096
  39
  40 struct dt_key;
  41 struct dt_rec;
  42 struct object_update_param;
  43 struct llog_update_record;
  44
  45 static inline size_t update_params_size(const struct update_params *params,
  46                                         unsigned int param_count)
  47 {
  48         struct object_update_param      *param;
  49         size_t total_size = sizeof(*params);
  50         unsigned int i;
  51
  52         param = (struct object_update_param *)&params->up_params[0];
  53         for (i = 0; i < param_count; i++) {
  54                 size_t size = object_update_param_size(param);
  55
  56                 param = (struct object_update_param *)((char *)param + size);
  57                 total_size += size;
  58         }
  59
  60         return total_size;
  61 }
  62
  63 static inline struct object_update_param *
  64 update_params_get_param(const struct update_params *params,
  65                         unsigned int index, unsigned int param_count)
  66 {
  67         struct object_update_param *param;
  68         unsigned int            i;
  69
  70         if (index > param_count)
  71                 return NULL;
  72
  73         param = (struct object_update_param *)&params->up_params[0];
  74         for (i = 0; i < index; i++)
  75                 param = (struct object_update_param *)((char *)param +
  76                         object_update_param_size(param));
  77
  78         return param;
  79 }
  80
  81 static inline void*
  82 update_params_get_param_buf(const struct update_params *params, __u16 index,
  83                             unsigned int param_count, __u16 *size)
  84 {
  85         struct object_update_param *param;
  86
  87         param = update_params_get_param(params, (unsigned int)index,
  88                                         param_count);
  89         if (param == NULL)
  90                 return NULL;
  91
  92         if (size != NULL)
  93                 *size = param->oup_len;
  94
  95         return param->oup_buf;
  96 }
  97
  98 static inline size_t
  99 update_op_size(unsigned int param_count)
 100 {
 101         return offsetof(struct update_op, uop_params_off[param_count]);
 102 }
 103
 104 static inline struct update_op *
 105 update_op_next_op(const struct update_op *uop)
 106 {
 107         return (struct update_op *)((char *)uop +
 108                                 update_op_size(uop->uop_param_count));
 109 }
 110
 111 static inline size_t update_ops_size(const struct update_ops *ops,
 112                                      unsigned int update_count)
 113 {
 114         struct update_op *op;
 115         size_t total_size = sizeof(*ops);
 116         unsigned int i;
 117
 118         op = (struct update_op *)&ops->uops_op[0];
 119         for (i = 0; i < update_count; i++, op = update_op_next_op(op))
 120                 total_size += update_op_size(op->uop_param_count);
 121
 122         return total_size;
 123 }
 124
 125 static inline struct update_params *
 126 update_records_get_params(const struct update_records *record)
 127 {
 128         return (struct update_params *)((char *)record +
 129                 offsetof(struct update_records, ur_ops) +
 130                 update_ops_size(&record->ur_ops, record->ur_update_count));
 131 }
 132
 133 static inline struct update_param *
 134 update_param_next_param(const struct update_param *param)
 135 {
 136         return (struct update_param *)((char *)param +
 137                                        object_update_param_size(
 138                                           (struct object_update_param *)param));
 139 }
 140
 141 static inline size_t
 142 __update_records_size(size_t raw_size)
 143 {
 144         return cfs_size_round(offsetof(struct update_records, ur_ops) +
 145                               raw_size);
 146 }
 147
 148 static inline size_t
 149 update_records_size(const struct update_records *record)
 150 {
 151         size_t op_size = 0;
 152         size_t param_size = 0;
 153
 154         if (record->ur_update_count > 0)
 155                 op_size = update_ops_size(&record->ur_ops,
 156                                           record->ur_update_count);
 157         if (record->ur_param_count > 0) {
 158                 struct update_params *params;
 159
 160                 params = update_records_get_params(record);
 161                 param_size = update_params_size(params, record->ur_param_count);
 162         }
 163
 164         return __update_records_size(op_size + param_size);
 165 }
 166
 167 static inline size_t
 168 __llog_update_record_size(size_t records_size)
 169 {
 170         return cfs_size_round(sizeof(struct llog_rec_hdr) + records_size +
 171                               sizeof(struct llog_rec_tail));
 172 }
 173
 174 static inline size_t
 175 llog_update_record_size(const struct llog_update_record *lur)
 176 {
 177         return __llog_update_record_size(
 178                         update_records_size(&lur->lur_update_rec));
 179 }
 180
 181 static inline struct update_op *
 182 update_ops_get_op(const struct update_ops *ops, unsigned int index,
 183                   unsigned int update_count)
 184 {
 185         struct update_op *op;
 186         unsigned int i;
 187
 188         if (index > update_count)
 189                 return NULL;
 190
 191         op = (struct update_op *)&ops->uops_op[0];
 192         for (i = 0; i < index; i++)
 193                 op = update_op_next_op(op);
 194
 195         return op;
 196 }
 197
 198 static inline void
 199 *object_update_param_get(const struct object_update *update, size_t index,
 200                          size_t *size)
 201 {
 202         const struct    object_update_param *param;
 203         size_t          i;
 204
 205         if (index >= update->ou_params_count)
 206                 return ERR_PTR(-EINVAL);
 207
 208         param = &update->ou_params[0];
 209         for (i = 0; i < index; i++)
 210                 param = (struct object_update_param *)((char *)param +
 211                         object_update_param_size(param));
 212
 213         if (size != NULL)
 214                 *size = param->oup_len;
 215
 216         if (param->oup_len == 0)
 217                 return ERR_PTR(-ENODATA);
 218
 219         return (void *)&param->oup_buf[0];
 220 }
 221
 222 static inline unsigned long
 223 object_update_request_size(const struct object_update_request *our)
 224 {
 225         unsigned long   size;
 226         size_t          i = 0;
 227
 228         size = offsetof(struct object_update_request, ourq_updates[0]);
 229         for (i = 0; i < our->ourq_count; i++) {
 230                 struct object_update *update;
 231
 232                 update = (struct object_update *)((char *)our + size);
 233                 size += object_update_size(update);
 234         }
 235         return size;
 236 }
 237
 238 static inline void
 239 object_update_result_insert(struct object_update_reply *reply,
 240                             void *data, size_t data_len, size_t index,
 241                             int rc)
 242 {
 243         struct object_update_result *update_result;
 244
 245         update_result = object_update_result_get(reply, index, NULL);
 246         LASSERT(update_result);
 247
 248         update_result->our_rc = ptlrpc_status_hton(rc);
 249         if (rc >= 0) {
 250                 if (data_len > 0 && data)
 251                         memcpy(update_result->our_data, data, data_len);
 252                 update_result->our_datalen = data_len;
 253         }
 254
 255         reply->ourp_lens[index] = cfs_size_round(data_len +
 256                                         sizeof(struct object_update_result));
 257 }
 258
 259 static inline int
 260 object_update_result_data_get(const struct object_update_reply *reply,
 261                               struct lu_buf *lbuf, size_t index)
 262 {
 263         struct object_update_result *update_result;
 264         size_t size = 0;
 265         int    result;
 266
 267         LASSERT(lbuf != NULL);
 268         update_result = object_update_result_get(reply, index, &size);
 269         if (update_result == NULL ||
 270             size < cfs_size_round(sizeof(struct object_update_reply)) ||
 271             update_result->our_datalen > size)
 272                 RETURN(-EFAULT);
 273
 274         result = ptlrpc_status_ntoh(update_result->our_rc);
 275         if (result < 0)
 276                 return result;
 277
 278         lbuf->lb_buf = update_result->our_data;
 279         lbuf->lb_len = update_result->our_datalen;
 280
 281         return result;
 282 }
 283
 284 /**
 285  * Attached in the thandle to record the updates for distribute
 286  * distribution.
 287  */
 288 struct thandle_update_records {
 289         /* All of updates for the cross-MDT operation, vmalloc'd. */
 290         struct llog_update_record       *tur_update_records;
 291         size_t                          tur_update_records_buf_size;
 292
 293         /* All of parameters for the cross-MDT operation, vmalloc'd */
 294         struct update_params    *tur_update_params;
 295         unsigned int            tur_update_param_count;
 296         size_t                  tur_update_params_buf_size;
 297 };
 298
 299 #define TOP_THANDLE_MAGIC       0x20140917
 300 struct top_multiple_thandle {
 301         struct dt_device        *tmt_master_sub_dt;
 302         atomic_t                tmt_refcount;
 303         /* Other sub transactions will be listed here. */
 304         struct list_head        tmt_sub_thandle_list;
 305         spinlock_t              tmt_sub_lock;
 306
 307         struct list_head        tmt_commit_list;
 308         /* All of update records will packed here */
 309         struct thandle_update_records *tmt_update_records;
 310
 311         wait_queue_head_t       tmt_stop_waitq;
 312         __u64                   tmt_batchid;
 313         int                     tmt_result;
 314         __u32                   tmt_magic;
 315         size_t                  tmt_record_size;
 316         __u32                   tmt_committed:1;
 317 };
 318
 319 /* {top,sub}_thandle are used to manage distributed transactions which
 320  * include updates on several nodes. A top_handle represents the
 321  * whole operation, and sub_thandle represents updates on each node. */
 322 struct top_thandle {
 323         struct thandle          tt_super;
 324         /* The master sub transaction. */
 325         struct thandle          *tt_master_sub_thandle;
 326
 327         struct top_multiple_thandle *tt_multiple_thandle;
 328 };
 329
 330 struct sub_thandle_cookie {
 331         struct llog_cookie      stc_cookie;
 332         struct list_head        stc_list;
 333 };
 334
 335 /* Sub thandle is used to track multiple sub thandles under one parent
 336  * thandle */
 337 struct sub_thandle {
 338         struct thandle          *st_sub_th;
 339         struct dt_device        *st_dt;
 340         struct list_head        st_cookie_list;
 341         struct dt_txn_commit_cb st_commit_dcb;
 342         struct dt_txn_commit_cb st_stop_dcb;
 343         int                     st_result;
 344
 345         /* linked to top_thandle */
 346         struct list_head        st_sub_list;
 347
 348         /* If this sub thandle is committed */
 349         bool                    st_committed:1,
 350                                 st_stopped:1,
 351                                 st_started:1;
 352 };
 353
 354 struct tx_arg;
 355 typedef int (*tx_exec_func_t)(const struct lu_env *env, struct thandle *th,
 356                               struct tx_arg *ta);
 357
 358 /* Structure for holding one update execution */
 359 struct tx_arg {
 360         tx_exec_func_t           exec_fn;
 361         tx_exec_func_t           undo_fn;
 362         struct dt_object        *object;
 363         const char              *file;
 364         struct object_update_reply *reply;
 365         int                      line;
 366         int                      index;
 367         union {
 368                 struct {
 369                         struct dt_insert_rec     rec;
 370                         const struct dt_key     *key;
 371                 } insert;
 372                 struct {
 373                 } ref;
 374                 struct {
 375                         struct lu_attr   attr;
 376                 } attr_set;
 377                 struct {
 378                         struct lu_buf    buf;
 379                         const char      *name;
 380                         int              flags;
 381                         __u32            csum;
 382                 } xattr_set;
 383                 struct {
 384                         struct lu_attr                  attr;
 385                         struct dt_allocation_hint       hint;
 386                         struct dt_object_format         dof;
 387                         struct lu_fid                   fid;
 388                 } create;
 389                 struct {
 390                         struct lu_buf   buf;
 391                         loff_t          pos;
 392                 } write;
 393                 struct {
 394                         struct ost_body     *body;
 395                 } destroy;
 396         } u;
 397 };
 398
 399 /* Structure for holding all update executations of one transaction */
 400 struct thandle_exec_args {
 401         struct thandle          *ta_handle;
 402         int                     ta_argno;   /* used args */
 403         int                     ta_alloc_args; /* allocated args count */
 404         struct tx_arg           **ta_args;
 405 };
 406
 407 /* target/out_lib.c */
 408 int out_update_pack(const struct lu_env *env, struct object_update *update,
 409                     size_t *max_update_size, enum update_type op,
 410                     const struct lu_fid *fid, unsigned int params_count,
 411                     __u16 *param_sizes, const void **param_bufs,
 412                     __u32 reply_size);
 413 int out_create_pack(const struct lu_env *env, struct object_update *update,
 414                     size_t *max_update_size, const struct lu_fid *fid,
 415                     const struct lu_attr *attr, struct dt_allocation_hint *hint,
 416                     struct dt_object_format *dof);
 417 int out_destroy_pack(const struct lu_env *env, struct object_update *update,
 418                      size_t *max_update_size, const struct lu_fid *fid);
 419 int out_index_delete_pack(const struct lu_env *env,
 420                           struct object_update *update, size_t *max_update_size,
 421                           const struct lu_fid *fid, const struct dt_key *key);
 422 int out_index_insert_pack(const struct lu_env *env,
 423                           struct object_update *update, size_t *max_update_size,
 424                           const struct lu_fid *fid, const struct dt_rec *rec,
 425                           const struct dt_key *key);
 426 int out_xattr_set_pack(const struct lu_env *env,
 427                        struct object_update *update, size_t *max_update_size,
 428                        const struct lu_fid *fid, const struct lu_buf *buf,
 429                        const char *name, __u32 flag);
 430 int out_xattr_del_pack(const struct lu_env *env,
 431                        struct object_update *update, size_t *max_update_size,
 432                        const struct lu_fid *fid, const char *name);
 433 int out_attr_set_pack(const struct lu_env *env,
 434                       struct object_update *update, size_t *max_update_size,
 435                       const struct lu_fid *fid, const struct lu_attr *attr);
 436 int out_ref_add_pack(const struct lu_env *env,
 437                      struct object_update *update, size_t *max_update_size,
 438                      const struct lu_fid *fid);
 439 int out_ref_del_pack(const struct lu_env *env,
 440                      struct object_update *update, size_t *max_update_size,
 441                      const struct lu_fid *fid);
 442 int out_write_pack(const struct lu_env *env,
 443                    struct object_update *update, size_t *max_update_size,
 444                    const struct lu_fid *fid, const struct lu_buf *buf,
 445                    __u64 pos);
 446 int out_attr_get_pack(const struct lu_env *env,
 447                       struct object_update *update, size_t *max_update_size,
 448                       const struct lu_fid *fid);
 449 int out_index_lookup_pack(const struct lu_env *env,
 450                           struct object_update *update, size_t *max_update_size,
 451                           const struct lu_fid *fid, struct dt_rec *rec,
 452                           const struct dt_key *key);
 453 int out_xattr_get_pack(const struct lu_env *env,
 454                        struct object_update *update, size_t *max_update_size,
 455                        const struct lu_fid *fid, const char *name,
 456                        const int bufsize);
 457 int out_xattr_list_pack(const struct lu_env *env, struct object_update *update,
 458                        size_t *max_update_size, const struct lu_fid *fid,
 459                        const int bufsize);
 460 int out_read_pack(const struct lu_env *env, struct object_update *update,
 461                   size_t *max_update_length, const struct lu_fid *fid,
 462                   size_t size, loff_t pos);
 463
 464 const char *update_op_str(__u16 opcode);
 465
 466 /* target/update_trans.c */
 467 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
 468                                       struct thandle *th,
 469                                       struct dt_device *sub_dt);
 470
 471 static inline struct thandle *
 472 thandle_get_sub(const struct lu_env *env, struct thandle *th,
 473                  const struct dt_object *sub_obj)
 474 {
 475         return thandle_get_sub_by_dt(env, th, lu2dt_dev(sub_obj->do_lu.lo_dev));
 476 }
 477
 478 struct thandle *
 479 top_trans_create(const struct lu_env *env, struct dt_device *master_dev);
 480 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
 481                     struct thandle *th);
 482 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
 483                    struct thandle *th);
 484 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt);
 485
 486 static inline void top_multiple_thandle_get(struct top_multiple_thandle *tmt)
 487 {
 488         atomic_inc(&tmt->tmt_refcount);
 489 }
 490
 491 static inline void top_multiple_thandle_put(struct top_multiple_thandle *tmt)
 492 {
 493         if (atomic_dec_and_test(&tmt->tmt_refcount))
 494                 top_multiple_thandle_destroy(tmt);
 495 }
 496
 497 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
 498                                        struct dt_device *dt_dev);
 499 int sub_thandle_trans_create(const struct lu_env *env,
 500                              struct top_thandle *top_th,
 501                              struct sub_thandle *st);
 502
 503 /* update_records.c */
 504 size_t update_records_create_size(const struct lu_env *env,
 505                                   const struct lu_fid *fid,
 506                                   const struct lu_attr *attr,
 507                                   const struct dt_allocation_hint *hint,
 508                                   struct dt_object_format *dof);
 509 size_t update_records_attr_set_size(const struct lu_env *env,
 510                                     const struct lu_fid *fid,
 511                                     const struct lu_attr *attr);
 512 size_t update_records_ref_add_size(const struct lu_env *env,
 513                                    const struct lu_fid *fid);
 514 size_t update_records_ref_del_size(const struct lu_env *env,
 515                                    const struct lu_fid *fid);
 516 size_t update_records_destroy_size(const struct lu_env *env,
 517                                    const struct lu_fid *fid);
 518 size_t update_records_index_insert_size(const struct lu_env *env,
 519                                         const struct lu_fid *fid,
 520                                         const struct dt_rec *rec,
 521                                         const struct dt_key *key);
 522 size_t update_records_index_delete_size(const struct lu_env *env,
 523                                         const struct lu_fid *fid,
 524                                         const struct dt_key *key);
 525 size_t update_records_xattr_set_size(const struct lu_env *env,
 526                                      const struct lu_fid *fid,
 527                                      const struct lu_buf *buf,
 528                                      const char *name,
 529                                      __u32 flag);
 530 size_t update_records_xattr_del_size(const struct lu_env *env,
 531                                      const struct lu_fid *fid,
 532                                      const char *name);
 533 size_t update_records_write_size(const struct lu_env *env,
 534                                  const struct lu_fid *fid,
 535                                  const struct lu_buf *buf,
 536                                  __u64 pos);
 537 size_t update_records_punch_size(const struct lu_env *env,
 538                                  const struct lu_fid *fid,
 539                                  __u64 start, __u64 end);
 540
 541 int update_records_create_pack(const struct lu_env *env,
 542                                struct update_ops *ops,
 543                                unsigned int *op_count,
 544                                size_t *max_ops_size,
 545                                struct update_params *params,
 546                                unsigned int *param_count,
 547                                size_t *max_param_size,
 548                                const struct lu_fid *fid,
 549                                const struct lu_attr *attr,
 550                                const struct dt_allocation_hint *hint,
 551                                struct dt_object_format *dof);
 552 int update_records_attr_set_pack(const struct lu_env *env,
 553                                  struct update_ops *ops,
 554                                  unsigned int *op_count,
 555                                  size_t *max_ops_size,
 556                                  struct update_params *params,
 557                                  unsigned int *param_count,
 558                                  size_t *max_param_size,
 559                                  const struct lu_fid *fid,
 560                                  const struct lu_attr *attr);
 561 int update_records_ref_add_pack(const struct lu_env *env,
 562                                 struct update_ops *ops,
 563                                 unsigned int *op_count,
 564                                 size_t *max_ops_size,
 565                                 struct update_params *params,
 566                                 unsigned int *param_count,
 567                                 size_t *max_param_size,
 568                                 const struct lu_fid *fid);
 569 int update_records_ref_del_pack(const struct lu_env *env,
 570                                 struct update_ops *ops,
 571                                 unsigned int *op_count,
 572                                 size_t *max_ops_size,
 573                                 struct update_params *params,
 574                                 unsigned int *param_count,
 575                                 size_t *max_param_size,
 576                                 const struct lu_fid *fid);
 577 int update_records_destroy_pack(const struct lu_env *env,
 578                                 struct update_ops *ops, unsigned int *op_count,
 579                                 size_t *max_ops_size,
 580                                 struct update_params *params,
 581                                 unsigned int *param_count,
 582                                 size_t *max_param_size,
 583                                 const struct lu_fid *fid);
 584 int update_records_index_insert_pack(const struct lu_env *env,
 585                                      struct update_ops *ops,
 586                                      unsigned int *op_count,
 587                                      size_t *max_ops_size,
 588                                      struct update_params *params,
 589                                      unsigned int *param_count,
 590                                      size_t *max_param_size,
 591                                      const struct lu_fid *fid,
 592                                      const struct dt_rec *rec,
 593                                      const struct dt_key *key);
 594 int update_records_index_delete_pack(const struct lu_env *env,
 595                                      struct update_ops *ops,
 596                                      unsigned int *op_count,
 597                                      size_t *max_ops_size,
 598                                      struct update_params *params,
 599                                      unsigned int *param_count,
 600                                      size_t *max_param_size,
 601                                      const struct lu_fid *fid,
 602                                      const struct dt_key *key);
 603 int update_records_xattr_set_pack(const struct lu_env *env,
 604                                   struct update_ops *ops,
 605                                   unsigned int *op_count,
 606                                   size_t *max_ops_size,
 607                                   struct update_params *params,
 608                                   unsigned int *param_count,
 609                                   size_t *max_param_size,
 610                                   const struct lu_fid *fid,
 611                                   const struct lu_buf *buf, const char *name,
 612                                   __u32 flag);
 613 int update_records_xattr_del_pack(const struct lu_env *env,
 614                                   struct update_ops *ops,
 615                                   unsigned int *op_count,
 616                                   size_t *max_ops_size,
 617                                   struct update_params *params,
 618                                   unsigned int *param_count,
 619                                   size_t *max_param_size,
 620                                   const struct lu_fid *fid,
 621                                   const char *name);
 622 int update_records_write_pack(const struct lu_env *env,
 623                               struct update_ops *ops,
 624                               unsigned int *op_count,
 625                               size_t *max_ops_size,
 626                               struct update_params *params,
 627                               unsigned int *param_count,
 628                               size_t *max_param_size,
 629                               const struct lu_fid *fid,
 630                               const struct lu_buf *buf,
 631                               __u64 pos);
 632 int update_records_punch_pack(const struct lu_env *env,
 633                               struct update_ops *ops,
 634                               unsigned int *op_count,
 635                               size_t *max_ops_size,
 636                               struct update_params *params,
 637                               unsigned int *param_count,
 638                               size_t *max_param_size,
 639                               const struct lu_fid *fid,
 640                               __u64 start, __u64 end);
 641 int update_records_noop_pack(const struct lu_env *env,
 642                              struct update_ops *ops,
 643                              unsigned int *op_count,
 644                              size_t *max_ops_size,
 645                              struct update_params *params,
 646                              unsigned int *param_count,
 647                              size_t *max_param_size,
 648                              const struct lu_fid *fid);
 649
 650 int tur_update_records_extend(struct thandle_update_records *tur,
 651                               size_t new_size);
 652 int tur_update_params_extend(struct thandle_update_records *tur,
 653                              size_t new_size);
 654 int tur_update_extend(struct thandle_update_records *tur,
 655                       size_t new_op_size, size_t new_param_size);
 656
 657 #define update_record_pack(name, th, ...)                               \
 658 ({                                                                      \
 659         struct top_thandle *top_th;                                     \
 660         struct top_multiple_thandle *tmt;                               \
 661         struct thandle_update_records *tur;                             \
 662         struct llog_update_record     *lur;                             \
 663         size_t          avail_param_size;                               \
 664         size_t          avail_op_size;                                  \
 665         int             ret;                                            \
 666                                                                         \
 667         while (1) {                                                     \
 668                 top_th = container_of(th, struct top_thandle, tt_super);\
 669                 tmt = top_th->tt_multiple_thandle;                      \
 670                 tur = tmt->tmt_update_records;                          \
 671                 lur = tur->tur_update_records;                          \
 672                 avail_param_size = tur->tur_update_params_buf_size -    \
 673                              update_params_size(tur->tur_update_params, \
 674                                         tur->tur_update_param_count);   \
 675                 avail_op_size = tur->tur_update_records_buf_size -      \
 676                                 llog_update_record_size(lur);           \
 677                 ret = update_records_##name##_pack(env,                 \
 678                                           &lur->lur_update_rec.ur_ops,  \
 679                                   &lur->lur_update_rec.ur_update_count, \
 680                                   &avail_op_size,                       \
 681                                   tur->tur_update_params,               \
 682                                   &tur->tur_update_param_count,         \
 683                                   &avail_param_size, __VA_ARGS__);      \
 684                 if (ret == -E2BIG) {                                    \
 685                         ret = tur_update_extend(tur, avail_op_size,     \
 686                                                    avail_param_size);   \
 687                         if (ret != 0)                                   \
 688                                 break;                                  \
 689                         continue;                                       \
 690                 } else {                                                \
 691                         break;                                          \
 692                 }                                                       \
 693         }                                                               \
 694         ret;                                                            \
 695 })
 696
 697 #define update_record_size(env, name, th, ...)                          \
 698 ({                                                                      \
 699         struct top_thandle *top_th;                                     \
 700         struct top_multiple_thandle *tmt;                               \
 701                                                                         \
 702         top_th = container_of(th, struct top_thandle, tt_super);        \
 703                                                                         \
 704         LASSERT(top_th->tt_multiple_thandle != NULL);                   \
 705         tmt = top_th->tt_multiple_thandle;                              \
 706         tmt->tmt_record_size +=                                         \
 707                 update_records_##name##_size(env, __VA_ARGS__);         \
 708 })
 709 #endif