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         char *ptr;
 245
 246         update_result = object_update_result_get(reply, index, NULL);
 247         LASSERT(update_result);
 248
 249         update_result->our_rc = ptlrpc_status_hton(rc);
 250         if (rc >= 0) {
 251                 if (data_len > 0) {
 252                         LASSERT(data);
 253
 254                         ptr = (char *)update_result +
 255                         cfs_size_round(sizeof(struct object_update_reply));
 256                         memcpy(ptr, data, data_len);
 257                 }
 258                 update_result->our_datalen = data_len;
 259         }
 260
 261         reply->ourp_lens[index] = cfs_size_round(data_len +
 262                                         sizeof(struct object_update_result));
 263 }
 264
 265 static inline int
 266 object_update_result_data_get(const struct object_update_reply *reply,
 267                               struct lu_buf *lbuf, size_t index)
 268 {
 269         struct object_update_result *update_result;
 270         size_t size = 0;
 271         int    result;
 272
 273         LASSERT(lbuf != NULL);
 274         update_result = object_update_result_get(reply, index, &size);
 275         if (update_result == NULL ||
 276             size < cfs_size_round(sizeof(struct object_update_reply)) ||
 277             update_result->our_datalen > size)
 278                 RETURN(-EFAULT);
 279
 280         result = ptlrpc_status_ntoh(update_result->our_rc);
 281         if (result < 0)
 282                 return result;
 283
 284         lbuf->lb_buf = update_result->our_data;
 285         lbuf->lb_len = update_result->our_datalen;
 286
 287         return result;
 288 }
 289
 290 /**
 291  * Attached in the thandle to record the updates for distribute
 292  * distribution.
 293  */
 294 struct thandle_update_records {
 295         /* All of updates for the cross-MDT operation, vmalloc'd. */
 296         struct llog_update_record       *tur_update_records;
 297         size_t                          tur_update_records_buf_size;
 298
 299         /* All of parameters for the cross-MDT operation, vmalloc'd */
 300         struct update_params    *tur_update_params;
 301         unsigned int            tur_update_param_count;
 302         size_t                  tur_update_params_buf_size;
 303 };
 304
 305 #define TOP_THANDLE_MAGIC       0x20140917
 306 struct top_multiple_thandle {
 307         struct dt_device        *tmt_master_sub_dt;
 308         atomic_t                tmt_refcount;
 309         /* Other sub transactions will be listed here. */
 310         struct list_head        tmt_sub_thandle_list;
 311         spinlock_t              tmt_sub_lock;
 312
 313         struct list_head        tmt_commit_list;
 314         /* All of update records will packed here */
 315         struct thandle_update_records *tmt_update_records;
 316
 317         wait_queue_head_t       tmt_stop_waitq;
 318         __u64                   tmt_batchid;
 319         int                     tmt_result;
 320         __u32                   tmt_magic;
 321         size_t                  tmt_record_size;
 322         __u32                   tmt_committed:1;
 323 };
 324
 325 /* {top,sub}_thandle are used to manage distributed transactions which
 326  * include updates on several nodes. A top_handle represents the
 327  * whole operation, and sub_thandle represents updates on each node. */
 328 struct top_thandle {
 329         struct thandle          tt_super;
 330         /* The master sub transaction. */
 331         struct thandle          *tt_master_sub_thandle;
 332
 333         struct top_multiple_thandle *tt_multiple_thandle;
 334 };
 335
 336 struct sub_thandle_cookie {
 337         struct llog_cookie      stc_cookie;
 338         struct list_head        stc_list;
 339 };
 340
 341 /* Sub thandle is used to track multiple sub thandles under one parent
 342  * thandle */
 343 struct sub_thandle {
 344         struct thandle          *st_sub_th;
 345         struct dt_device        *st_dt;
 346         struct list_head        st_cookie_list;
 347         struct dt_txn_commit_cb st_commit_dcb;
 348         struct dt_txn_commit_cb st_stop_dcb;
 349         int                     st_result;
 350
 351         /* linked to top_thandle */
 352         struct list_head        st_sub_list;
 353
 354         /* If this sub thandle is committed */
 355         bool                    st_committed:1,
 356                                 st_stopped:1,
 357                                 st_started:1;
 358 };
 359
 360 struct tx_arg;
 361 typedef int (*tx_exec_func_t)(const struct lu_env *env, struct thandle *th,
 362                               struct tx_arg *ta);
 363
 364 /* Structure for holding one update execution */
 365 struct tx_arg {
 366         tx_exec_func_t           exec_fn;
 367         tx_exec_func_t           undo_fn;
 368         struct dt_object        *object;
 369         const char              *file;
 370         struct object_update_reply *reply;
 371         int                      line;
 372         int                      index;
 373         union {
 374                 struct {
 375                         struct dt_insert_rec     rec;
 376                         const struct dt_key     *key;
 377                 } insert;
 378                 struct {
 379                 } ref;
 380                 struct {
 381                         struct lu_attr   attr;
 382                 } attr_set;
 383                 struct {
 384                         struct lu_buf    buf;
 385                         const char      *name;
 386                         int              flags;
 387                         __u32            csum;
 388                 } xattr_set;
 389                 struct {
 390                         struct lu_attr                  attr;
 391                         struct dt_allocation_hint       hint;
 392                         struct dt_object_format         dof;
 393                         struct lu_fid                   fid;
 394                 } create;
 395                 struct {
 396                         struct lu_buf   buf;
 397                         loff_t          pos;
 398                 } write;
 399                 struct {
 400                         struct ost_body     *body;
 401                 } destroy;
 402         } u;
 403 };
 404
 405 /* Structure for holding all update executations of one transaction */
 406 struct thandle_exec_args {
 407         struct thandle          *ta_handle;
 408         int                     ta_argno;   /* used args */
 409         int                     ta_alloc_args; /* allocated args count */
 410         struct tx_arg           **ta_args;
 411 };
 412
 413 /* target/out_lib.c */
 414 int out_update_pack(const struct lu_env *env, struct object_update *update,
 415                     size_t *max_update_size, enum update_type op,
 416                     const struct lu_fid *fid, unsigned int params_count,
 417                     __u16 *param_sizes, const void **param_bufs,
 418                     __u32 reply_size);
 419 int out_create_pack(const struct lu_env *env, struct object_update *update,
 420                     size_t *max_update_size, const struct lu_fid *fid,
 421                     const struct lu_attr *attr, struct dt_allocation_hint *hint,
 422                     struct dt_object_format *dof);
 423 int out_destroy_pack(const struct lu_env *env, struct object_update *update,
 424                      size_t *max_update_size, const struct lu_fid *fid);
 425 int out_index_delete_pack(const struct lu_env *env,
 426                           struct object_update *update, size_t *max_update_size,
 427                           const struct lu_fid *fid, const struct dt_key *key);
 428 int out_index_insert_pack(const struct lu_env *env,
 429                           struct object_update *update, size_t *max_update_size,
 430                           const struct lu_fid *fid, const struct dt_rec *rec,
 431                           const struct dt_key *key);
 432 int out_xattr_set_pack(const struct lu_env *env,
 433                        struct object_update *update, size_t *max_update_size,
 434                        const struct lu_fid *fid, const struct lu_buf *buf,
 435                        const char *name, __u32 flag);
 436 int out_xattr_del_pack(const struct lu_env *env,
 437                        struct object_update *update, size_t *max_update_size,
 438                        const struct lu_fid *fid, const char *name);
 439 int out_attr_set_pack(const struct lu_env *env,
 440                       struct object_update *update, size_t *max_update_size,
 441                       const struct lu_fid *fid, const struct lu_attr *attr);
 442 int out_ref_add_pack(const struct lu_env *env,
 443                      struct object_update *update, size_t *max_update_size,
 444                      const struct lu_fid *fid);
 445 int out_ref_del_pack(const struct lu_env *env,
 446                      struct object_update *update, size_t *max_update_size,
 447                      const struct lu_fid *fid);
 448 int out_write_pack(const struct lu_env *env,
 449                    struct object_update *update, size_t *max_update_size,
 450                    const struct lu_fid *fid, const struct lu_buf *buf,
 451                    __u64 pos);
 452 int out_attr_get_pack(const struct lu_env *env,
 453                       struct object_update *update, size_t *max_update_size,
 454                       const struct lu_fid *fid);
 455 int out_index_lookup_pack(const struct lu_env *env,
 456                           struct object_update *update, size_t *max_update_size,
 457                           const struct lu_fid *fid, struct dt_rec *rec,
 458                           const struct dt_key *key);
 459 int out_xattr_get_pack(const struct lu_env *env,
 460                        struct object_update *update, size_t *max_update_size,
 461                        const struct lu_fid *fid, const char *name,
 462                        const int bufsize);
 463 int out_read_pack(const struct lu_env *env, struct object_update *update,
 464                   size_t *max_update_length, const struct lu_fid *fid,
 465                   size_t size, loff_t pos);
 466
 467 const char *update_op_str(__u16 opcode);
 468
 469 /* target/update_trans.c */
 470 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
 471                                       struct thandle *th,
 472                                       struct dt_device *sub_dt);
 473
 474 static inline struct thandle *
 475 thandle_get_sub(const struct lu_env *env, struct thandle *th,
 476                  const struct dt_object *sub_obj)
 477 {
 478         return thandle_get_sub_by_dt(env, th, lu2dt_dev(sub_obj->do_lu.lo_dev));
 479 }
 480
 481 struct thandle *
 482 top_trans_create(const struct lu_env *env, struct dt_device *master_dev);
 483 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
 484                     struct thandle *th);
 485 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
 486                    struct thandle *th);
 487 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt);
 488
 489 static inline void top_multiple_thandle_get(struct top_multiple_thandle *tmt)
 490 {
 491         atomic_inc(&tmt->tmt_refcount);
 492 }
 493
 494 static inline void top_multiple_thandle_put(struct top_multiple_thandle *tmt)
 495 {
 496         if (atomic_dec_and_test(&tmt->tmt_refcount))
 497                 top_multiple_thandle_destroy(tmt);
 498 }
 499
 500 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
 501                                        struct dt_device *dt_dev);
 502 int sub_thandle_trans_create(const struct lu_env *env,
 503                              struct top_thandle *top_th,
 504                              struct sub_thandle *st);
 505
 506 /* update_records.c */
 507 size_t update_records_create_size(const struct lu_env *env,
 508                                   const struct lu_fid *fid,
 509                                   const struct lu_attr *attr,
 510                                   const struct dt_allocation_hint *hint,
 511                                   struct dt_object_format *dof);
 512 size_t update_records_attr_set_size(const struct lu_env *env,
 513                                     const struct lu_fid *fid,
 514                                     const struct lu_attr *attr);
 515 size_t update_records_ref_add_size(const struct lu_env *env,
 516                                    const struct lu_fid *fid);
 517 size_t update_records_ref_del_size(const struct lu_env *env,
 518                                    const struct lu_fid *fid);
 519 size_t update_records_destroy_size(const struct lu_env *env,
 520                                    const struct lu_fid *fid);
 521 size_t update_records_index_insert_size(const struct lu_env *env,
 522                                         const struct lu_fid *fid,
 523                                         const struct dt_rec *rec,
 524                                         const struct dt_key *key);
 525 size_t update_records_index_delete_size(const struct lu_env *env,
 526                                         const struct lu_fid *fid,
 527                                         const struct dt_key *key);
 528 size_t update_records_xattr_set_size(const struct lu_env *env,
 529                                      const struct lu_fid *fid,
 530                                      const struct lu_buf *buf,
 531                                      const char *name,
 532                                      __u32 flag);
 533 size_t update_records_xattr_del_size(const struct lu_env *env,
 534                                      const struct lu_fid *fid,
 535                                      const char *name);
 536 size_t update_records_write_size(const struct lu_env *env,
 537                                  const struct lu_fid *fid,
 538                                  const struct lu_buf *buf,
 539                                  __u64 pos);
 540 size_t update_records_punch_size(const struct lu_env *env,
 541                                  const struct lu_fid *fid,
 542                                  __u64 start, __u64 end);
 543
 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_destroy_pack(const struct lu_env *env,
 581                                 struct update_ops *ops, unsigned int *op_count,
 582                                 size_t *max_ops_size,
 583                                 struct update_params *params,
 584                                 unsigned int *param_count,
 585                                 size_t *max_param_size,
 586                                 const struct lu_fid *fid);
 587 int update_records_index_insert_pack(const struct lu_env *env,
 588                                      struct update_ops *ops,
 589                                      unsigned int *op_count,
 590                                      size_t *max_ops_size,
 591                                      struct update_params *params,
 592                                      unsigned int *param_count,
 593                                      size_t *max_param_size,
 594                                      const struct lu_fid *fid,
 595                                      const struct dt_rec *rec,
 596                                      const struct dt_key *key);
 597 int update_records_index_delete_pack(const struct lu_env *env,
 598                                      struct update_ops *ops,
 599                                      unsigned int *op_count,
 600                                      size_t *max_ops_size,
 601                                      struct update_params *params,
 602                                      unsigned int *param_count,
 603                                      size_t *max_param_size,
 604                                      const struct lu_fid *fid,
 605                                      const struct dt_key *key);
 606 int update_records_xattr_set_pack(const struct lu_env *env,
 607                                   struct update_ops *ops,
 608                                   unsigned int *op_count,
 609                                   size_t *max_ops_size,
 610                                   struct update_params *params,
 611                                   unsigned int *param_count,
 612                                   size_t *max_param_size,
 613                                   const struct lu_fid *fid,
 614                                   const struct lu_buf *buf, const char *name,
 615                                   __u32 flag);
 616 int update_records_xattr_del_pack(const struct lu_env *env,
 617                                   struct update_ops *ops,
 618                                   unsigned int *op_count,
 619                                   size_t *max_ops_size,
 620                                   struct update_params *params,
 621                                   unsigned int *param_count,
 622                                   size_t *max_param_size,
 623                                   const struct lu_fid *fid,
 624                                   const char *name);
 625 int update_records_write_pack(const struct lu_env *env,
 626                               struct update_ops *ops,
 627                               unsigned int *op_count,
 628                               size_t *max_ops_size,
 629                               struct update_params *params,
 630                               unsigned int *param_count,
 631                               size_t *max_param_size,
 632                               const struct lu_fid *fid,
 633                               const struct lu_buf *buf,
 634                               __u64 pos);
 635 int update_records_punch_pack(const struct lu_env *env,
 636                               struct update_ops *ops,
 637                               unsigned int *op_count,
 638                               size_t *max_ops_size,
 639                               struct update_params *params,
 640                               unsigned int *param_count,
 641                               size_t *max_param_size,
 642                               const struct lu_fid *fid,
 643                               __u64 start, __u64 end);
 644 int update_records_noop_pack(const struct lu_env *env,
 645                              struct update_ops *ops,
 646                              unsigned int *op_count,
 647                              size_t *max_ops_size,
 648                              struct update_params *params,
 649                              unsigned int *param_count,
 650                              size_t *max_param_size,
 651                              const struct lu_fid *fid);
 652
 653 int tur_update_records_extend(struct thandle_update_records *tur,
 654                               size_t new_size);
 655 int tur_update_params_extend(struct thandle_update_records *tur,
 656                              size_t new_size);
 657 int tur_update_extend(struct thandle_update_records *tur,
 658                       size_t new_op_size, size_t new_param_size);
 659
 660 #define update_record_pack(name, th, ...)                               \
 661 ({                                                                      \
 662         struct top_thandle *top_th;                                     \
 663         struct top_multiple_thandle *tmt;                               \
 664         struct thandle_update_records *tur;                             \
 665         struct llog_update_record     *lur;                             \
 666         size_t          avail_param_size;                               \
 667         size_t          avail_op_size;                                  \
 668         int             ret;                                            \
 669                                                                         \
 670         while (1) {                                                     \
 671                 top_th = container_of(th, struct top_thandle, tt_super);\
 672                 tmt = top_th->tt_multiple_thandle;                      \
 673                 tur = tmt->tmt_update_records;                          \
 674                 lur = tur->tur_update_records;                          \
 675                 avail_param_size = tur->tur_update_params_buf_size -    \
 676                              update_params_size(tur->tur_update_params, \
 677                                         tur->tur_update_param_count);   \
 678                 avail_op_size = tur->tur_update_records_buf_size -      \
 679                                 llog_update_record_size(lur);           \
 680                 ret = update_records_##name##_pack(env,                 \
 681                                           &lur->lur_update_rec.ur_ops,  \
 682                                   &lur->lur_update_rec.ur_update_count, \
 683                                   &avail_op_size,                       \
 684                                   tur->tur_update_params,               \
 685                                   &tur->tur_update_param_count,         \
 686                                   &avail_param_size, __VA_ARGS__);      \
 687                 if (ret == -E2BIG) {                                    \
 688                         ret = tur_update_extend(tur, avail_op_size,     \
 689                                                    avail_param_size);   \
 690                         if (ret != 0)                                   \
 691                                 break;                                  \
 692                         continue;                                       \
 693                 } else {                                                \
 694                         break;                                          \
 695                 }                                                       \
 696         }                                                               \
 697         ret;                                                            \
 698 })
 699
 700 #define update_record_size(env, name, th, ...)                          \
 701 ({                                                                      \
 702         struct top_thandle *top_th;                                     \
 703         struct top_multiple_thandle *tmt;                               \
 704                                                                         \
 705         top_th = container_of(th, struct top_thandle, tt_super);        \
 706                                                                         \
 707         LASSERT(top_th->tt_multiple_thandle != NULL);                   \
 708         tmt = top_th->tt_multiple_thandle;                              \
 709         tmt->tmt_record_size +=                                         \
 710                 update_records_##name##_size(env, __VA_ARGS__);         \
 711 })
 712 #endif