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, 2016, 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_INIT_BUFFER_SIZE     4096
  38 #define OUT_UPDATE_REPLY_SIZE           4096
  39 #define OUT_BULK_BUFFER_SIZE            4096
  40
  41 struct dt_key;
  42 struct dt_rec;
  43 struct object_update_param;
  44 struct llog_update_record;
  45
  46 static inline size_t update_params_size(const struct update_params *params,
  47                                         unsigned int param_count)
  48 {
  49         struct object_update_param      *param;
  50         size_t total_size = sizeof(*params);
  51         unsigned int i;
  52
  53         param = (struct object_update_param *)&params->up_params[0];
  54         for (i = 0; i < param_count; i++) {
  55                 size_t size = object_update_param_size(param);
  56
  57                 param = (struct object_update_param *)((char *)param + size);
  58                 total_size += size;
  59         }
  60
  61         return total_size;
  62 }
  63
  64 static inline struct object_update_param *
  65 update_params_get_param(const struct update_params *params,
  66                         unsigned int index, unsigned int param_count)
  67 {
  68         struct object_update_param *param;
  69         unsigned int            i;
  70
  71         if (index > param_count)
  72                 return NULL;
  73
  74         param = (struct object_update_param *)&params->up_params[0];
  75         for (i = 0; i < index; i++)
  76                 param = (struct object_update_param *)((char *)param +
  77                         object_update_param_size(param));
  78
  79         return param;
  80 }
  81
  82 static inline void*
  83 update_params_get_param_buf(const struct update_params *params, __u16 index,
  84                             unsigned int param_count, __u16 *size)
  85 {
  86         struct object_update_param *param;
  87
  88         param = update_params_get_param(params, (unsigned int)index,
  89                                         param_count);
  90         if (param == NULL)
  91                 return NULL;
  92
  93         if (size != NULL)
  94                 *size = param->oup_len;
  95
  96         return param->oup_buf;
  97 }
  98
  99 static inline size_t
 100 update_op_size(unsigned int param_count)
 101 {
 102         return offsetof(struct update_op, uop_params_off[param_count]);
 103 }
 104
 105 static inline struct update_op *
 106 update_op_next_op(const struct update_op *uop)
 107 {
 108         return (struct update_op *)((char *)uop +
 109                                 update_op_size(uop->uop_param_count));
 110 }
 111
 112 static inline size_t update_ops_size(const struct update_ops *ops,
 113                                      unsigned int update_count)
 114 {
 115         struct update_op *op;
 116         size_t total_size = sizeof(*ops);
 117         unsigned int i;
 118
 119         op = (struct update_op *)&ops->uops_op[0];
 120         for (i = 0; i < update_count; i++, op = update_op_next_op(op))
 121                 total_size += update_op_size(op->uop_param_count);
 122
 123         return total_size;
 124 }
 125
 126 static inline struct update_params *
 127 update_records_get_params(const struct update_records *record)
 128 {
 129         return (struct update_params *)((char *)record +
 130                 offsetof(struct update_records, ur_ops) +
 131                 update_ops_size(&record->ur_ops, record->ur_update_count));
 132 }
 133
 134 static inline struct update_param *
 135 update_param_next_param(const struct update_param *param)
 136 {
 137         return (struct update_param *)((char *)param +
 138                                        object_update_param_size(
 139                                           (struct object_update_param *)param));
 140 }
 141
 142 static inline size_t
 143 __update_records_size(size_t raw_size)
 144 {
 145         return cfs_size_round(offsetof(struct update_records, ur_ops) +
 146                               raw_size);
 147 }
 148
 149 static inline size_t
 150 update_records_size(const struct update_records *record)
 151 {
 152         size_t op_size = 0;
 153         size_t param_size = 0;
 154
 155         if (record->ur_update_count > 0)
 156                 op_size = update_ops_size(&record->ur_ops,
 157                                           record->ur_update_count);
 158         if (record->ur_param_count > 0) {
 159                 struct update_params *params;
 160
 161                 params = update_records_get_params(record);
 162                 param_size = update_params_size(params, record->ur_param_count);
 163         }
 164
 165         return __update_records_size(op_size + param_size);
 166 }
 167
 168 static inline size_t
 169 __llog_update_record_size(size_t records_size)
 170 {
 171         return cfs_size_round(sizeof(struct llog_rec_hdr) + records_size +
 172                               sizeof(struct llog_rec_tail));
 173 }
 174
 175 static inline size_t
 176 llog_update_record_size(const struct llog_update_record *lur)
 177 {
 178         return __llog_update_record_size(
 179                         update_records_size(&lur->lur_update_rec));
 180 }
 181
 182 static inline struct update_op *
 183 update_ops_get_op(const struct update_ops *ops, unsigned int index,
 184                   unsigned int update_count)
 185 {
 186         struct update_op *op;
 187         unsigned int i;
 188
 189         if (index > update_count)
 190                 return NULL;
 191
 192         op = (struct update_op *)&ops->uops_op[0];
 193         for (i = 0; i < index; i++)
 194                 op = update_op_next_op(op);
 195
 196         return op;
 197 }
 198
 199 static inline void
 200 *object_update_param_get(const struct object_update *update, size_t index,
 201                          size_t *size)
 202 {
 203         const struct    object_update_param *param;
 204         size_t          i;
 205
 206         if (index >= update->ou_params_count)
 207                 return ERR_PTR(-EINVAL);
 208
 209         param = &update->ou_params[0];
 210         for (i = 0; i < index; i++)
 211                 param = (struct object_update_param *)((char *)param +
 212                         object_update_param_size(param));
 213
 214         if (size != NULL)
 215                 *size = param->oup_len;
 216
 217         if (param->oup_len == 0)
 218                 return ERR_PTR(-ENODATA);
 219
 220         return (void *)&param->oup_buf[0];
 221 }
 222
 223 static inline unsigned long
 224 object_update_request_size(const struct object_update_request *our)
 225 {
 226         unsigned long   size;
 227         size_t          i = 0;
 228
 229         size = offsetof(struct object_update_request, ourq_updates[0]);
 230         for (i = 0; i < our->ourq_count; i++) {
 231                 struct object_update *update;
 232
 233                 update = (struct object_update *)((char *)our + size);
 234                 size += object_update_size(update);
 235         }
 236         return size;
 237 }
 238
 239 static inline void
 240 object_update_result_insert(struct object_update_reply *reply,
 241                             void *data, size_t data_len, size_t index,
 242                             int rc)
 243 {
 244         struct object_update_result *update_result;
 245         char *ptr;
 246
 247         update_result = object_update_result_get(reply, index, NULL);
 248         LASSERT(update_result);
 249
 250         update_result->our_rc = ptlrpc_status_hton(rc);
 251         if (rc >= 0) {
 252                 if (data_len > 0) {
 253                         LASSERT(data);
 254
 255                         ptr = (char *)update_result +
 256                         cfs_size_round(sizeof(struct object_update_reply));
 257                         memcpy(ptr, data, data_len);
 258                 }
 259                 update_result->our_datalen = data_len;
 260         }
 261
 262         reply->ourp_lens[index] = cfs_size_round(data_len +
 263                                         sizeof(struct object_update_result));
 264 }
 265
 266 static inline int
 267 object_update_result_data_get(const struct object_update_reply *reply,
 268                               struct lu_buf *lbuf, size_t index)
 269 {
 270         struct object_update_result *update_result;
 271         size_t size = 0;
 272         int    result;
 273
 274         LASSERT(lbuf != NULL);
 275         update_result = object_update_result_get(reply, index, &size);
 276         if (update_result == NULL ||
 277             size < cfs_size_round(sizeof(struct object_update_reply)) ||
 278             update_result->our_datalen > size)
 279                 RETURN(-EFAULT);
 280
 281         result = ptlrpc_status_ntoh(update_result->our_rc);
 282         if (result < 0)
 283                 return result;
 284
 285         lbuf->lb_buf = update_result->our_data;
 286         lbuf->lb_len = update_result->our_datalen;
 287
 288         return result;
 289 }
 290
 291 /**
 292  * Attached in the thandle to record the updates for distribute
 293  * distribution.
 294  */
 295 struct thandle_update_records {
 296         /* All of updates for the cross-MDT operation, vmalloc'd. */
 297         struct llog_update_record       *tur_update_records;
 298         size_t                          tur_update_records_buf_size;
 299
 300         /* All of parameters for the cross-MDT operation, vmalloc'd */
 301         struct update_params    *tur_update_params;
 302         unsigned int            tur_update_param_count;
 303         size_t                  tur_update_params_buf_size;
 304 };
 305
 306 #define TOP_THANDLE_MAGIC       0x20140917
 307 struct top_multiple_thandle {
 308         struct dt_device        *tmt_master_sub_dt;
 309         atomic_t                tmt_refcount;
 310         /* Other sub transactions will be listed here. */
 311         struct list_head        tmt_sub_thandle_list;
 312         spinlock_t              tmt_sub_lock;
 313
 314         struct list_head        tmt_commit_list;
 315         /* All of update records will packed here */
 316         struct thandle_update_records *tmt_update_records;
 317
 318         wait_queue_head_t       tmt_stop_waitq;
 319         __u64                   tmt_batchid;
 320         int                     tmt_result;
 321         __u32                   tmt_magic;
 322         size_t                  tmt_record_size;
 323         __u32                   tmt_committed:1;
 324 };
 325
 326 /* {top,sub}_thandle are used to manage distributed transactions which
 327  * include updates on several nodes. A top_handle represents the
 328  * whole operation, and sub_thandle represents updates on each node. */
 329 struct top_thandle {
 330         struct thandle          tt_super;
 331         /* The master sub transaction. */
 332         struct thandle          *tt_master_sub_thandle;
 333
 334         struct top_multiple_thandle *tt_multiple_thandle;
 335 };
 336
 337 struct sub_thandle_cookie {
 338         struct llog_cookie      stc_cookie;
 339         struct list_head        stc_list;
 340 };
 341
 342 /* Sub thandle is used to track multiple sub thandles under one parent
 343  * thandle */
 344 struct sub_thandle {
 345         struct thandle          *st_sub_th;
 346         struct dt_device        *st_dt;
 347         struct list_head        st_cookie_list;
 348         struct dt_txn_commit_cb st_commit_dcb;
 349         struct dt_txn_commit_cb st_stop_dcb;
 350         int                     st_result;
 351
 352         /* linked to top_thandle */
 353         struct list_head        st_sub_list;
 354
 355         /* If this sub thandle is committed */
 356         bool                    st_committed:1,
 357                                 st_stopped:1,
 358                                 st_started:1;
 359 };
 360
 361 struct tx_arg;
 362 typedef int (*tx_exec_func_t)(const struct lu_env *env, struct thandle *th,
 363                               struct tx_arg *ta);
 364
 365 /* Structure for holding one update execution */
 366 struct tx_arg {
 367         tx_exec_func_t           exec_fn;
 368         tx_exec_func_t           undo_fn;
 369         struct dt_object        *object;
 370         const char              *file;
 371         struct object_update_reply *reply;
 372         int                      line;
 373         int                      index;
 374         union {
 375                 struct {
 376                         struct dt_insert_rec     rec;
 377                         const struct dt_key     *key;
 378                 } insert;
 379                 struct {
 380                 } ref;
 381                 struct {
 382                         struct lu_attr   attr;
 383                 } attr_set;
 384                 struct {
 385                         struct lu_buf    buf;
 386                         const char      *name;
 387                         int              flags;
 388                         __u32            csum;
 389                 } xattr_set;
 390                 struct {
 391                         struct lu_attr                  attr;
 392                         struct dt_allocation_hint       hint;
 393                         struct dt_object_format         dof;
 394                         struct lu_fid                   fid;
 395                 } create;
 396                 struct {
 397                         struct lu_buf   buf;
 398                         loff_t          pos;
 399                 } write;
 400                 struct {
 401                         struct ost_body     *body;
 402                 } destroy;
 403         } u;
 404 };
 405
 406 /* Structure for holding all update executations of one transaction */
 407 struct thandle_exec_args {
 408         struct thandle          *ta_handle;
 409         int                     ta_argno;   /* used args */
 410         int                     ta_alloc_args; /* allocated args count */
 411         struct tx_arg           **ta_args;
 412 };
 413
 414 /* target/out_lib.c */
 415 int out_update_pack(const struct lu_env *env, struct object_update *update,
 416                     size_t *max_update_size, enum update_type op,
 417                     const struct lu_fid *fid, unsigned int params_count,
 418                     __u16 *param_sizes, const void **param_bufs,
 419                     __u32 reply_size);
 420 int out_create_pack(const struct lu_env *env, struct object_update *update,
 421                     size_t *max_update_size, const struct lu_fid *fid,
 422                     const struct lu_attr *attr, struct dt_allocation_hint *hint,
 423                     struct dt_object_format *dof);
 424 int out_destroy_pack(const struct lu_env *env, struct object_update *update,
 425                      size_t *max_update_size, const struct lu_fid *fid);
 426 int out_index_delete_pack(const struct lu_env *env,
 427                           struct object_update *update, size_t *max_update_size,
 428                           const struct lu_fid *fid, const struct dt_key *key);
 429 int out_index_insert_pack(const struct lu_env *env,
 430                           struct object_update *update, size_t *max_update_size,
 431                           const struct lu_fid *fid, const struct dt_rec *rec,
 432                           const struct dt_key *key);
 433 int out_xattr_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_buf *buf,
 436                        const char *name, __u32 flag);
 437 int out_xattr_del_pack(const struct lu_env *env,
 438                        struct object_update *update, size_t *max_update_size,
 439                        const struct lu_fid *fid, const char *name);
 440 int out_attr_set_pack(const struct lu_env *env,
 441                       struct object_update *update, size_t *max_update_size,
 442                       const struct lu_fid *fid, const struct lu_attr *attr);
 443 int out_ref_add_pack(const struct lu_env *env,
 444                      struct object_update *update, size_t *max_update_size,
 445                      const struct lu_fid *fid);
 446 int out_ref_del_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_write_pack(const struct lu_env *env,
 450                    struct object_update *update, size_t *max_update_size,
 451                    const struct lu_fid *fid, const struct lu_buf *buf,
 452                    __u64 pos);
 453 int out_attr_get_pack(const struct lu_env *env,
 454                       struct object_update *update, size_t *max_update_size,
 455                       const struct lu_fid *fid);
 456 int out_index_lookup_pack(const struct lu_env *env,
 457                           struct object_update *update, size_t *max_update_size,
 458                           const struct lu_fid *fid, struct dt_rec *rec,
 459                           const struct dt_key *key);
 460 int out_xattr_get_pack(const struct lu_env *env,
 461                        struct object_update *update, size_t *max_update_size,
 462                        const struct lu_fid *fid, const char *name,
 463                        const int bufsize);
 464 int out_read_pack(const struct lu_env *env, struct object_update *update,
 465                   size_t *max_update_length, const struct lu_fid *fid,
 466                   size_t size, loff_t pos);
 467
 468 const char *update_op_str(__u16 opcode);
 469
 470 /* target/update_trans.c */
 471 struct thandle *thandle_get_sub_by_dt(const struct lu_env *env,
 472                                       struct thandle *th,
 473                                       struct dt_device *sub_dt);
 474
 475 static inline struct thandle *
 476 thandle_get_sub(const struct lu_env *env, struct thandle *th,
 477                  const struct dt_object *sub_obj)
 478 {
 479         return thandle_get_sub_by_dt(env, th, lu2dt_dev(sub_obj->do_lu.lo_dev));
 480 }
 481
 482 struct thandle *
 483 top_trans_create(const struct lu_env *env, struct dt_device *master_dev);
 484 int top_trans_start(const struct lu_env *env, struct dt_device *master_dev,
 485                     struct thandle *th);
 486 int top_trans_stop(const struct lu_env *env, struct dt_device *master_dev,
 487                    struct thandle *th);
 488 void top_multiple_thandle_destroy(struct top_multiple_thandle *tmt);
 489
 490 static inline void top_multiple_thandle_get(struct top_multiple_thandle *tmt)
 491 {
 492         atomic_inc(&tmt->tmt_refcount);
 493 }
 494
 495 static inline void top_multiple_thandle_put(struct top_multiple_thandle *tmt)
 496 {
 497         if (atomic_dec_and_test(&tmt->tmt_refcount))
 498                 top_multiple_thandle_destroy(tmt);
 499 }
 500
 501 struct sub_thandle *lookup_sub_thandle(struct top_multiple_thandle *tmt,
 502                                        struct dt_device *dt_dev);
 503 int sub_thandle_trans_create(const struct lu_env *env,
 504                              struct top_thandle *top_th,
 505                              struct sub_thandle *st);
 506
 507 /* update_records.c */
 508 size_t update_records_create_size(const struct lu_env *env,
 509                                   const struct lu_fid *fid,
 510                                   const struct lu_attr *attr,
 511                                   const struct dt_allocation_hint *hint,
 512                                   struct dt_object_format *dof);
 513 size_t update_records_attr_set_size(const struct lu_env *env,
 514                                     const struct lu_fid *fid,
 515                                     const struct lu_attr *attr);
 516 size_t update_records_ref_add_size(const struct lu_env *env,
 517                                    const struct lu_fid *fid);
 518 size_t update_records_ref_del_size(const struct lu_env *env,
 519                                    const struct lu_fid *fid);
 520 size_t update_records_destroy_size(const struct lu_env *env,
 521                                    const struct lu_fid *fid);
 522 size_t update_records_index_insert_size(const struct lu_env *env,
 523                                         const struct lu_fid *fid,
 524                                         const struct dt_rec *rec,
 525                                         const struct dt_key *key);
 526 size_t update_records_index_delete_size(const struct lu_env *env,
 527                                         const struct lu_fid *fid,
 528                                         const struct dt_key *key);
 529 size_t update_records_xattr_set_size(const struct lu_env *env,
 530                                      const struct lu_fid *fid,
 531                                      const struct lu_buf *buf,
 532                                      const char *name,
 533                                      __u32 flag);
 534 size_t update_records_xattr_del_size(const struct lu_env *env,
 535                                      const struct lu_fid *fid,
 536                                      const char *name);
 537 size_t update_records_write_size(const struct lu_env *env,
 538                                  const struct lu_fid *fid,
 539                                  const struct lu_buf *buf,
 540                                  __u64 pos);
 541 size_t update_records_punch_size(const struct lu_env *env,
 542                                  const struct lu_fid *fid,
 543                                  __u64 start, __u64 end);
 544
 545 int update_records_create_pack(const struct lu_env *env,
 546                                struct update_ops *ops,
 547                                unsigned int *op_count,
 548                                size_t *max_ops_size,
 549                                struct update_params *params,
 550                                unsigned int *param_count,
 551                                size_t *max_param_size,
 552                                const struct lu_fid *fid,
 553                                const struct lu_attr *attr,
 554                                const struct dt_allocation_hint *hint,
 555                                struct dt_object_format *dof);
 556 int update_records_attr_set_pack(const struct lu_env *env,
 557                                  struct update_ops *ops,
 558                                  unsigned int *op_count,
 559                                  size_t *max_ops_size,
 560                                  struct update_params *params,
 561                                  unsigned int *param_count,
 562                                  size_t *max_param_size,
 563                                  const struct lu_fid *fid,
 564                                  const struct lu_attr *attr);
 565 int update_records_ref_add_pack(const struct lu_env *env,
 566                                 struct update_ops *ops,
 567                                 unsigned int *op_count,
 568                                 size_t *max_ops_size,
 569                                 struct update_params *params,
 570                                 unsigned int *param_count,
 571                                 size_t *max_param_size,
 572                                 const struct lu_fid *fid);
 573 int update_records_ref_del_pack(const struct lu_env *env,
 574                                 struct update_ops *ops,
 575                                 unsigned int *op_count,
 576                                 size_t *max_ops_size,
 577                                 struct update_params *params,
 578                                 unsigned int *param_count,
 579                                 size_t *max_param_size,
 580                                 const struct lu_fid *fid);
 581 int update_records_destroy_pack(const struct lu_env *env,
 582                                 struct update_ops *ops, 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 int update_records_noop_pack(const struct lu_env *env,
 646                              struct update_ops *ops,
 647                              unsigned int *op_count,
 648                              size_t *max_ops_size,
 649                              struct update_params *params,
 650                              unsigned int *param_count,
 651                              size_t *max_param_size,
 652                              const struct lu_fid *fid);
 653
 654 int tur_update_records_extend(struct thandle_update_records *tur,
 655                               size_t new_size);
 656 int tur_update_params_extend(struct thandle_update_records *tur,
 657                              size_t new_size);
 658 int tur_update_extend(struct thandle_update_records *tur,
 659                       size_t new_op_size, size_t new_param_size);
 660
 661 #define update_record_pack(name, th, ...)                               \
 662 ({                                                                      \
 663         struct top_thandle *top_th;                                     \
 664         struct top_multiple_thandle *tmt;                               \
 665         struct thandle_update_records *tur;                             \
 666         struct llog_update_record     *lur;                             \
 667         size_t          avail_param_size;                               \
 668         size_t          avail_op_size;                                  \
 669         int             ret;                                            \
 670                                                                         \
 671         while (1) {                                                     \
 672                 top_th = container_of(th, struct top_thandle, tt_super);\
 673                 tmt = top_th->tt_multiple_thandle;                      \
 674                 tur = tmt->tmt_update_records;                          \
 675                 lur = tur->tur_update_records;                          \
 676                 avail_param_size = tur->tur_update_params_buf_size -    \
 677                              update_params_size(tur->tur_update_params, \
 678                                         tur->tur_update_param_count);   \
 679                 avail_op_size = tur->tur_update_records_buf_size -      \
 680                                 llog_update_record_size(lur);           \
 681                 ret = update_records_##name##_pack(env,                 \
 682                                           &lur->lur_update_rec.ur_ops,  \
 683                                   &lur->lur_update_rec.ur_update_count, \
 684                                   &avail_op_size,                       \
 685                                   tur->tur_update_params,               \
 686                                   &tur->tur_update_param_count,         \
 687                                   &avail_param_size, __VA_ARGS__);      \
 688                 if (ret == -E2BIG) {                                    \
 689                         ret = tur_update_extend(tur, avail_op_size,     \
 690                                                    avail_param_size);   \
 691                         if (ret != 0)                                   \
 692                                 break;                                  \
 693                         continue;                                       \
 694                 } else {                                                \
 695                         break;                                          \
 696                 }                                                       \
 697         }                                                               \
 698         ret;                                                            \
 699 })
 700
 701 #define update_record_size(env, name, th, ...)                          \
 702 ({                                                                      \
 703         struct top_thandle *top_th;                                     \
 704         struct top_multiple_thandle *tmt;                               \
 705                                                                         \
 706         top_th = container_of(th, struct top_thandle, tt_super);        \
 707                                                                         \
 708         LASSERT(top_th->tt_multiple_thandle != NULL);                   \
 709         tmt = top_th->tt_multiple_thandle;                              \
 710         tmt->tmt_record_size +=                                         \
 711                 update_records_##name##_size(env, __VA_ARGS__);         \
 712 })
 713 #endif