drivers/staging/lustre/lustre/ptlrpc/layout.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/ptlrpc/layout.c
  33  *
  34  * Lustre Metadata Target (mdt) request handler
  35  *
  36  * Author: Nikita Danilov <nikita@clusterfs.com>
  37  */
  38 /*
  39  * This file contains the "capsule/pill" abstraction layered above PTLRPC.
  40  *
  41  * Every struct ptlrpc_request contains a "pill", which points to a description
  42  * of the format that the request conforms to.
  43  */
  44
  45 #if !defined(__REQ_LAYOUT_USER__)
  46
  47 #define DEBUG_SUBSYSTEM S_RPC
  48
  49 #include <linux/module.h>
  50
  51 /* LUSTRE_VERSION_CODE */
  52 #include "../include/lustre_ver.h"
  53
  54 #include "../include/obd_support.h"
  55 /* lustre_swab_mdt_body */
  56 #include "../include/lustre/lustre_idl.h"
  57 /* obd2cli_tgt() (required by DEBUG_REQ()) */
  58 #include "../include/obd.h"
  59
  60 /* __REQ_LAYOUT_USER__ */
  61 #endif
  62 /* struct ptlrpc_request, lustre_msg* */
  63 #include "../include/lustre_req_layout.h"
  64 #include "../include/lustre_acl.h"
  65 #include "../include/lustre_debug.h"
  66
  67 /*
  68  * RQFs (see below) refer to two struct req_msg_field arrays describing the
  69  * client request and server reply, respectively.
  70  */
  71 /* empty set of fields... for suitable definition of emptiness. */
  72 static const struct req_msg_field *empty[] = {
  73         &RMF_PTLRPC_BODY
  74 };
  75
  76 static const struct req_msg_field *mgs_target_info_only[] = {
  77         &RMF_PTLRPC_BODY,
  78         &RMF_MGS_TARGET_INFO
  79 };
  80
  81 static const struct req_msg_field *mgs_set_info[] = {
  82         &RMF_PTLRPC_BODY,
  83         &RMF_MGS_SEND_PARAM
  84 };
  85
  86 static const struct req_msg_field *mgs_config_read_client[] = {
  87         &RMF_PTLRPC_BODY,
  88         &RMF_MGS_CONFIG_BODY
  89 };
  90
  91 static const struct req_msg_field *mgs_config_read_server[] = {
  92         &RMF_PTLRPC_BODY,
  93         &RMF_MGS_CONFIG_RES
  94 };
  95
  96 static const struct req_msg_field *log_cancel_client[] = {
  97         &RMF_PTLRPC_BODY,
  98         &RMF_LOGCOOKIES
  99 };
 100
 101 static const struct req_msg_field *mdt_body_only[] = {
 102         &RMF_PTLRPC_BODY,
 103         &RMF_MDT_BODY
 104 };
 105
 106 static const struct req_msg_field *mdt_body_capa[] = {
 107         &RMF_PTLRPC_BODY,
 108         &RMF_MDT_BODY,
 109         &RMF_CAPA1
 110 };
 111
 112 static const struct req_msg_field *quotactl_only[] = {
 113         &RMF_PTLRPC_BODY,
 114         &RMF_OBD_QUOTACTL
 115 };
 116
 117 static const struct req_msg_field *mdt_close_client[] = {
 118         &RMF_PTLRPC_BODY,
 119         &RMF_MDT_EPOCH,
 120         &RMF_REC_REINT,
 121         &RMF_CAPA1
 122 };
 123
 124 static const struct req_msg_field *mdt_release_close_client[] = {
 125         &RMF_PTLRPC_BODY,
 126         &RMF_MDT_EPOCH,
 127         &RMF_REC_REINT,
 128         &RMF_CAPA1,
 129         &RMF_CLOSE_DATA
 130 };
 131
 132 static const struct req_msg_field *obd_statfs_server[] = {
 133         &RMF_PTLRPC_BODY,
 134         &RMF_OBD_STATFS
 135 };
 136
 137 static const struct req_msg_field *seq_query_client[] = {
 138         &RMF_PTLRPC_BODY,
 139         &RMF_SEQ_OPC,
 140         &RMF_SEQ_RANGE
 141 };
 142
 143 static const struct req_msg_field *seq_query_server[] = {
 144         &RMF_PTLRPC_BODY,
 145         &RMF_SEQ_RANGE
 146 };
 147
 148 static const struct req_msg_field *fld_query_client[] = {
 149         &RMF_PTLRPC_BODY,
 150         &RMF_FLD_OPC,
 151         &RMF_FLD_MDFLD
 152 };
 153
 154 static const struct req_msg_field *fld_query_server[] = {
 155         &RMF_PTLRPC_BODY,
 156         &RMF_FLD_MDFLD
 157 };
 158
 159 static const struct req_msg_field *fld_read_client[] = {
 160         &RMF_PTLRPC_BODY,
 161         &RMF_FLD_MDFLD
 162 };
 163
 164 static const struct req_msg_field *fld_read_server[] = {
 165         &RMF_PTLRPC_BODY,
 166         &RMF_GENERIC_DATA
 167 };
 168
 169 static const struct req_msg_field *mds_getattr_name_client[] = {
 170         &RMF_PTLRPC_BODY,
 171         &RMF_MDT_BODY,
 172         &RMF_CAPA1,
 173         &RMF_NAME
 174 };
 175
 176 static const struct req_msg_field *mds_reint_client[] = {
 177         &RMF_PTLRPC_BODY,
 178         &RMF_REC_REINT
 179 };
 180
 181 static const struct req_msg_field *mds_reint_create_client[] = {
 182         &RMF_PTLRPC_BODY,
 183         &RMF_REC_REINT,
 184         &RMF_CAPA1,
 185         &RMF_NAME
 186 };
 187
 188 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 189         &RMF_PTLRPC_BODY,
 190         &RMF_REC_REINT,
 191         &RMF_CAPA1,
 192         &RMF_NAME,
 193         &RMF_EADATA,
 194         &RMF_DLM_REQ
 195 };
 196
 197 static const struct req_msg_field *mds_reint_create_acl_client[] = {
 198         &RMF_PTLRPC_BODY,
 199         &RMF_REC_REINT,
 200         &RMF_CAPA1,
 201         &RMF_NAME,
 202         &RMF_EADATA,
 203         &RMF_DLM_REQ
 204 };
 205
 206 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 207         &RMF_PTLRPC_BODY,
 208         &RMF_REC_REINT,
 209         &RMF_CAPA1,
 210         &RMF_NAME,
 211         &RMF_SYMTGT,
 212         &RMF_DLM_REQ
 213 };
 214
 215 static const struct req_msg_field *mds_reint_open_client[] = {
 216         &RMF_PTLRPC_BODY,
 217         &RMF_REC_REINT,
 218         &RMF_CAPA1,
 219         &RMF_CAPA2,
 220         &RMF_NAME,
 221         &RMF_EADATA
 222 };
 223
 224 static const struct req_msg_field *mds_reint_open_server[] = {
 225         &RMF_PTLRPC_BODY,
 226         &RMF_MDT_BODY,
 227         &RMF_MDT_MD,
 228         &RMF_ACL,
 229         &RMF_CAPA1,
 230         &RMF_CAPA2
 231 };
 232
 233 static const struct req_msg_field *mds_reint_unlink_client[] = {
 234         &RMF_PTLRPC_BODY,
 235         &RMF_REC_REINT,
 236         &RMF_CAPA1,
 237         &RMF_NAME,
 238         &RMF_DLM_REQ
 239 };
 240
 241 static const struct req_msg_field *mds_reint_link_client[] = {
 242         &RMF_PTLRPC_BODY,
 243         &RMF_REC_REINT,
 244         &RMF_CAPA1,
 245         &RMF_CAPA2,
 246         &RMF_NAME,
 247         &RMF_DLM_REQ
 248 };
 249
 250 static const struct req_msg_field *mds_reint_rename_client[] = {
 251         &RMF_PTLRPC_BODY,
 252         &RMF_REC_REINT,
 253         &RMF_CAPA1,
 254         &RMF_CAPA2,
 255         &RMF_NAME,
 256         &RMF_SYMTGT,
 257         &RMF_DLM_REQ
 258 };
 259
 260 static const struct req_msg_field *mds_last_unlink_server[] = {
 261         &RMF_PTLRPC_BODY,
 262         &RMF_MDT_BODY,
 263         &RMF_MDT_MD,
 264         &RMF_LOGCOOKIES,
 265         &RMF_CAPA1,
 266         &RMF_CAPA2
 267 };
 268
 269 static const struct req_msg_field *mds_reint_setattr_client[] = {
 270         &RMF_PTLRPC_BODY,
 271         &RMF_REC_REINT,
 272         &RMF_CAPA1,
 273         &RMF_MDT_EPOCH,
 274         &RMF_EADATA,
 275         &RMF_LOGCOOKIES,
 276         &RMF_DLM_REQ
 277 };
 278
 279 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 280         &RMF_PTLRPC_BODY,
 281         &RMF_REC_REINT,
 282         &RMF_CAPA1,
 283         &RMF_NAME,
 284         &RMF_EADATA,
 285         &RMF_DLM_REQ
 286 };
 287
 288 static const struct req_msg_field *mdt_swap_layouts[] = {
 289         &RMF_PTLRPC_BODY,
 290         &RMF_MDT_BODY,
 291         &RMF_SWAP_LAYOUTS,
 292         &RMF_CAPA1,
 293         &RMF_CAPA2,
 294         &RMF_DLM_REQ
 295 };
 296
 297 static const struct req_msg_field *obd_connect_client[] = {
 298         &RMF_PTLRPC_BODY,
 299         &RMF_TGTUUID,
 300         &RMF_CLUUID,
 301         &RMF_CONN,
 302         &RMF_CONNECT_DATA
 303 };
 304
 305 static const struct req_msg_field *obd_connect_server[] = {
 306         &RMF_PTLRPC_BODY,
 307         &RMF_CONNECT_DATA
 308 };
 309
 310 static const struct req_msg_field *obd_set_info_client[] = {
 311         &RMF_PTLRPC_BODY,
 312         &RMF_SETINFO_KEY,
 313         &RMF_SETINFO_VAL
 314 };
 315
 316 static const struct req_msg_field *ost_grant_shrink_client[] = {
 317         &RMF_PTLRPC_BODY,
 318         &RMF_SETINFO_KEY,
 319         &RMF_OST_BODY
 320 };
 321
 322 static const struct req_msg_field *mds_getinfo_client[] = {
 323         &RMF_PTLRPC_BODY,
 324         &RMF_GETINFO_KEY,
 325         &RMF_GETINFO_VALLEN
 326 };
 327
 328 static const struct req_msg_field *mds_getinfo_server[] = {
 329         &RMF_PTLRPC_BODY,
 330         &RMF_GETINFO_VAL,
 331 };
 332
 333 static const struct req_msg_field *ldlm_enqueue_client[] = {
 334         &RMF_PTLRPC_BODY,
 335         &RMF_DLM_REQ
 336 };
 337
 338 static const struct req_msg_field *ldlm_enqueue_server[] = {
 339         &RMF_PTLRPC_BODY,
 340         &RMF_DLM_REP
 341 };
 342
 343 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 344         &RMF_PTLRPC_BODY,
 345         &RMF_DLM_REP,
 346         &RMF_DLM_LVB
 347 };
 348
 349 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 350         &RMF_PTLRPC_BODY,
 351         &RMF_DLM_REQ,
 352         &RMF_DLM_LVB
 353 };
 354
 355 static const struct req_msg_field *ldlm_gl_callback_desc_client[] = {
 356         &RMF_PTLRPC_BODY,
 357         &RMF_DLM_REQ,
 358         &RMF_DLM_GL_DESC
 359 };
 360
 361 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 362         &RMF_PTLRPC_BODY,
 363         &RMF_DLM_LVB
 364 };
 365
 366 static const struct req_msg_field *ldlm_intent_basic_client[] = {
 367         &RMF_PTLRPC_BODY,
 368         &RMF_DLM_REQ,
 369         &RMF_LDLM_INTENT,
 370 };
 371
 372 static const struct req_msg_field *ldlm_intent_client[] = {
 373         &RMF_PTLRPC_BODY,
 374         &RMF_DLM_REQ,
 375         &RMF_LDLM_INTENT,
 376         &RMF_REC_REINT
 377 };
 378
 379 static const struct req_msg_field *ldlm_intent_server[] = {
 380         &RMF_PTLRPC_BODY,
 381         &RMF_DLM_REP,
 382         &RMF_MDT_BODY,
 383         &RMF_MDT_MD,
 384         &RMF_ACL
 385 };
 386
 387 static const struct req_msg_field *ldlm_intent_layout_client[] = {
 388         &RMF_PTLRPC_BODY,
 389         &RMF_DLM_REQ,
 390         &RMF_LDLM_INTENT,
 391         &RMF_LAYOUT_INTENT,
 392         &RMF_EADATA /* for new layout to be set up */
 393 };
 394
 395 static const struct req_msg_field *ldlm_intent_open_server[] = {
 396         &RMF_PTLRPC_BODY,
 397         &RMF_DLM_REP,
 398         &RMF_MDT_BODY,
 399         &RMF_MDT_MD,
 400         &RMF_ACL,
 401         &RMF_CAPA1,
 402         &RMF_CAPA2
 403 };
 404
 405 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 406         &RMF_PTLRPC_BODY,
 407         &RMF_DLM_REQ,
 408         &RMF_LDLM_INTENT,
 409         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 410         &RMF_CAPA1,
 411         &RMF_NAME
 412 };
 413
 414 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 415         &RMF_PTLRPC_BODY,
 416         &RMF_DLM_REP,
 417         &RMF_MDT_BODY,
 418         &RMF_MDT_MD,
 419         &RMF_ACL,
 420         &RMF_CAPA1
 421 };
 422
 423 static const struct req_msg_field *ldlm_intent_create_client[] = {
 424         &RMF_PTLRPC_BODY,
 425         &RMF_DLM_REQ,
 426         &RMF_LDLM_INTENT,
 427         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 428         &RMF_CAPA1,
 429         &RMF_NAME,
 430         &RMF_EADATA
 431 };
 432
 433 static const struct req_msg_field *ldlm_intent_open_client[] = {
 434         &RMF_PTLRPC_BODY,
 435         &RMF_DLM_REQ,
 436         &RMF_LDLM_INTENT,
 437         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 438         &RMF_CAPA1,
 439         &RMF_CAPA2,
 440         &RMF_NAME,
 441         &RMF_EADATA
 442 };
 443
 444 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 445         &RMF_PTLRPC_BODY,
 446         &RMF_DLM_REQ,
 447         &RMF_LDLM_INTENT,
 448         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 449         &RMF_CAPA1,
 450         &RMF_NAME
 451 };
 452
 453 static const struct req_msg_field *ldlm_intent_getxattr_client[] = {
 454         &RMF_PTLRPC_BODY,
 455         &RMF_DLM_REQ,
 456         &RMF_LDLM_INTENT,
 457         &RMF_MDT_BODY,
 458         &RMF_CAPA1,
 459 };
 460
 461 static const struct req_msg_field *ldlm_intent_getxattr_server[] = {
 462         &RMF_PTLRPC_BODY,
 463         &RMF_DLM_REP,
 464         &RMF_MDT_BODY,
 465         &RMF_MDT_MD,
 466         &RMF_ACL, /* for req_capsule_extend/mdt_intent_policy */
 467         &RMF_EADATA,
 468         &RMF_EAVALS,
 469         &RMF_EAVALS_LENS
 470 };
 471
 472 static const struct req_msg_field *mds_getxattr_client[] = {
 473         &RMF_PTLRPC_BODY,
 474         &RMF_MDT_BODY,
 475         &RMF_CAPA1,
 476         &RMF_NAME,
 477         &RMF_EADATA
 478 };
 479
 480 static const struct req_msg_field *mds_getxattr_server[] = {
 481         &RMF_PTLRPC_BODY,
 482         &RMF_MDT_BODY,
 483         &RMF_EADATA
 484 };
 485
 486 static const struct req_msg_field *mds_getattr_server[] = {
 487         &RMF_PTLRPC_BODY,
 488         &RMF_MDT_BODY,
 489         &RMF_MDT_MD,
 490         &RMF_ACL,
 491         &RMF_CAPA1,
 492         &RMF_CAPA2
 493 };
 494
 495 static const struct req_msg_field *mds_setattr_server[] = {
 496         &RMF_PTLRPC_BODY,
 497         &RMF_MDT_BODY,
 498         &RMF_MDT_MD,
 499         &RMF_ACL,
 500         &RMF_CAPA1,
 501         &RMF_CAPA2
 502 };
 503
 504 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 505         &RMF_PTLRPC_BODY,
 506         &RMF_LLOGD_BODY,
 507         &RMF_NAME
 508 };
 509
 510 static const struct req_msg_field *llogd_body_only[] = {
 511         &RMF_PTLRPC_BODY,
 512         &RMF_LLOGD_BODY
 513 };
 514
 515 static const struct req_msg_field *llog_log_hdr_only[] = {
 516         &RMF_PTLRPC_BODY,
 517         &RMF_LLOG_LOG_HDR
 518 };
 519
 520 static const struct req_msg_field *llogd_conn_body_only[] = {
 521         &RMF_PTLRPC_BODY,
 522         &RMF_LLOGD_CONN_BODY
 523 };
 524
 525 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 526         &RMF_PTLRPC_BODY,
 527         &RMF_LLOGD_BODY,
 528         &RMF_EADATA
 529 };
 530
 531 static const struct req_msg_field *ost_body_only[] = {
 532         &RMF_PTLRPC_BODY,
 533         &RMF_OST_BODY
 534 };
 535
 536 static const struct req_msg_field *ost_body_capa[] = {
 537         &RMF_PTLRPC_BODY,
 538         &RMF_OST_BODY,
 539         &RMF_CAPA1
 540 };
 541
 542 static const struct req_msg_field *ost_destroy_client[] = {
 543         &RMF_PTLRPC_BODY,
 544         &RMF_OST_BODY,
 545         &RMF_DLM_REQ,
 546         &RMF_CAPA1
 547 };
 548
 549 static const struct req_msg_field *ost_brw_client[] = {
 550         &RMF_PTLRPC_BODY,
 551         &RMF_OST_BODY,
 552         &RMF_OBD_IOOBJ,
 553         &RMF_NIOBUF_REMOTE,
 554         &RMF_CAPA1
 555 };
 556
 557 static const struct req_msg_field *ost_brw_read_server[] = {
 558         &RMF_PTLRPC_BODY,
 559         &RMF_OST_BODY
 560 };
 561
 562 static const struct req_msg_field *ost_brw_write_server[] = {
 563         &RMF_PTLRPC_BODY,
 564         &RMF_OST_BODY,
 565         &RMF_RCS
 566 };
 567
 568 static const struct req_msg_field *ost_get_info_generic_server[] = {
 569         &RMF_PTLRPC_BODY,
 570         &RMF_GENERIC_DATA,
 571 };
 572
 573 static const struct req_msg_field *ost_get_info_generic_client[] = {
 574         &RMF_PTLRPC_BODY,
 575         &RMF_GETINFO_KEY
 576 };
 577
 578 static const struct req_msg_field *ost_get_last_id_server[] = {
 579         &RMF_PTLRPC_BODY,
 580         &RMF_OBD_ID
 581 };
 582
 583 static const struct req_msg_field *ost_get_last_fid_client[] = {
 584         &RMF_PTLRPC_BODY,
 585         &RMF_GETINFO_KEY,
 586         &RMF_FID,
 587 };
 588
 589 static const struct req_msg_field *ost_get_last_fid_server[] = {
 590         &RMF_PTLRPC_BODY,
 591         &RMF_FID,
 592 };
 593
 594 static const struct req_msg_field *ost_get_fiemap_client[] = {
 595         &RMF_PTLRPC_BODY,
 596         &RMF_FIEMAP_KEY,
 597         &RMF_FIEMAP_VAL
 598 };
 599
 600 static const struct req_msg_field *ost_get_fiemap_server[] = {
 601         &RMF_PTLRPC_BODY,
 602         &RMF_FIEMAP_VAL
 603 };
 604
 605 static const struct req_msg_field *mdt_hsm_progress[] = {
 606         &RMF_PTLRPC_BODY,
 607         &RMF_MDT_BODY,
 608         &RMF_MDS_HSM_PROGRESS,
 609 };
 610
 611 static const struct req_msg_field *mdt_hsm_ct_register[] = {
 612         &RMF_PTLRPC_BODY,
 613         &RMF_MDT_BODY,
 614         &RMF_MDS_HSM_ARCHIVE,
 615 };
 616
 617 static const struct req_msg_field *mdt_hsm_ct_unregister[] = {
 618         &RMF_PTLRPC_BODY,
 619         &RMF_MDT_BODY,
 620 };
 621
 622 static const struct req_msg_field *mdt_hsm_action_server[] = {
 623         &RMF_PTLRPC_BODY,
 624         &RMF_MDT_BODY,
 625         &RMF_MDS_HSM_CURRENT_ACTION,
 626 };
 627
 628 static const struct req_msg_field *mdt_hsm_state_get_server[] = {
 629         &RMF_PTLRPC_BODY,
 630         &RMF_MDT_BODY,
 631         &RMF_HSM_USER_STATE,
 632 };
 633
 634 static const struct req_msg_field *mdt_hsm_state_set[] = {
 635         &RMF_PTLRPC_BODY,
 636         &RMF_MDT_BODY,
 637         &RMF_CAPA1,
 638         &RMF_HSM_STATE_SET,
 639 };
 640
 641 static const struct req_msg_field *mdt_hsm_request[] = {
 642         &RMF_PTLRPC_BODY,
 643         &RMF_MDT_BODY,
 644         &RMF_MDS_HSM_REQUEST,
 645         &RMF_MDS_HSM_USER_ITEM,
 646         &RMF_GENERIC_DATA,
 647 };
 648
 649 static struct req_format *req_formats[] = {
 650         &RQF_OBD_PING,
 651         &RQF_OBD_SET_INFO,
 652         &RQF_SEC_CTX,
 653         &RQF_MGS_TARGET_REG,
 654         &RQF_MGS_SET_INFO,
 655         &RQF_MGS_CONFIG_READ,
 656         &RQF_SEQ_QUERY,
 657         &RQF_FLD_QUERY,
 658         &RQF_FLD_READ,
 659         &RQF_MDS_CONNECT,
 660         &RQF_MDS_DISCONNECT,
 661         &RQF_MDS_GET_INFO,
 662         &RQF_MDS_GETSTATUS,
 663         &RQF_MDS_STATFS,
 664         &RQF_MDS_GETATTR,
 665         &RQF_MDS_GETATTR_NAME,
 666         &RQF_MDS_GETXATTR,
 667         &RQF_MDS_SYNC,
 668         &RQF_MDS_CLOSE,
 669         &RQF_MDS_RELEASE_CLOSE,
 670         &RQF_MDS_READPAGE,
 671         &RQF_MDS_WRITEPAGE,
 672         &RQF_MDS_DONE_WRITING,
 673         &RQF_MDS_REINT,
 674         &RQF_MDS_REINT_CREATE,
 675         &RQF_MDS_REINT_CREATE_ACL,
 676         &RQF_MDS_REINT_CREATE_SLAVE,
 677         &RQF_MDS_REINT_CREATE_SYM,
 678         &RQF_MDS_REINT_OPEN,
 679         &RQF_MDS_REINT_UNLINK,
 680         &RQF_MDS_REINT_LINK,
 681         &RQF_MDS_REINT_RENAME,
 682         &RQF_MDS_REINT_SETATTR,
 683         &RQF_MDS_REINT_SETXATTR,
 684         &RQF_MDS_QUOTACHECK,
 685         &RQF_MDS_QUOTACTL,
 686         &RQF_MDS_HSM_PROGRESS,
 687         &RQF_MDS_HSM_CT_REGISTER,
 688         &RQF_MDS_HSM_CT_UNREGISTER,
 689         &RQF_MDS_HSM_STATE_GET,
 690         &RQF_MDS_HSM_STATE_SET,
 691         &RQF_MDS_HSM_ACTION,
 692         &RQF_MDS_HSM_REQUEST,
 693         &RQF_MDS_SWAP_LAYOUTS,
 694         &RQF_QC_CALLBACK,
 695         &RQF_OST_CONNECT,
 696         &RQF_OST_DISCONNECT,
 697         &RQF_OST_QUOTACHECK,
 698         &RQF_OST_QUOTACTL,
 699         &RQF_OST_GETATTR,
 700         &RQF_OST_SETATTR,
 701         &RQF_OST_CREATE,
 702         &RQF_OST_PUNCH,
 703         &RQF_OST_SYNC,
 704         &RQF_OST_DESTROY,
 705         &RQF_OST_BRW_READ,
 706         &RQF_OST_BRW_WRITE,
 707         &RQF_OST_STATFS,
 708         &RQF_OST_SET_GRANT_INFO,
 709         &RQF_OST_GET_INFO,
 710         &RQF_OST_GET_INFO_LAST_ID,
 711         &RQF_OST_GET_INFO_LAST_FID,
 712         &RQF_OST_SET_INFO_LAST_FID,
 713         &RQF_OST_GET_INFO_FIEMAP,
 714         &RQF_LDLM_ENQUEUE,
 715         &RQF_LDLM_ENQUEUE_LVB,
 716         &RQF_LDLM_CONVERT,
 717         &RQF_LDLM_CANCEL,
 718         &RQF_LDLM_CALLBACK,
 719         &RQF_LDLM_CP_CALLBACK,
 720         &RQF_LDLM_BL_CALLBACK,
 721         &RQF_LDLM_GL_CALLBACK,
 722         &RQF_LDLM_GL_DESC_CALLBACK,
 723         &RQF_LDLM_INTENT,
 724         &RQF_LDLM_INTENT_BASIC,
 725         &RQF_LDLM_INTENT_LAYOUT,
 726         &RQF_LDLM_INTENT_GETATTR,
 727         &RQF_LDLM_INTENT_OPEN,
 728         &RQF_LDLM_INTENT_CREATE,
 729         &RQF_LDLM_INTENT_UNLINK,
 730         &RQF_LDLM_INTENT_GETXATTR,
 731         &RQF_LOG_CANCEL,
 732         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 733         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 734         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 735         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 736         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 737         &RQF_LLOG_ORIGIN_CONNECT,
 738         &RQF_CONNECT,
 739 };
 740
 741 struct req_msg_field {
 742         const __u32 rmf_flags;
 743         const char  *rmf_name;
 744         /**
 745          * Field length. (-1) means "variable length".  If the
 746          * \a RMF_F_STRUCT_ARRAY flag is set the field is also variable-length,
 747          * but the actual size must be a whole multiple of \a rmf_size.
 748          */
 749         const int   rmf_size;
 750         void    (*rmf_swabber)(void *);
 751         void    (*rmf_dumper)(void *);
 752         int      rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 753 };
 754
 755 enum rmf_flags {
 756         /**
 757          * The field is a string, must be NUL-terminated.
 758          */
 759         RMF_F_STRING = BIT(0),
 760         /**
 761          * The field's buffer size need not match the declared \a rmf_size.
 762          */
 763         RMF_F_NO_SIZE_CHECK = BIT(1),
 764         /**
 765          * The field's buffer size must be a whole multiple of the declared \a
 766          * rmf_size and the \a rmf_swabber function must work on the declared \a
 767          * rmf_size worth of bytes.
 768          */
 769         RMF_F_STRUCT_ARRAY = BIT(2)
 770 };
 771
 772 struct req_capsule;
 773
 774 /*
 775  * Request fields.
 776  */
 777 #define DEFINE_MSGF(name, flags, size, swabber, dumper) {       \
 778         .rmf_name    = (name),                                  \
 779         .rmf_flags   = (flags),                                 \
 780         .rmf_size    = (size),                                  \
 781         .rmf_swabber = (void (*)(void *))(swabber),             \
 782         .rmf_dumper  = (void (*)(void *))(dumper)               \
 783 }
 784
 785 struct req_msg_field RMF_GENERIC_DATA =
 786         DEFINE_MSGF("generic_data", 0,
 787                     -1, NULL, NULL);
 788 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 789
 790 struct req_msg_field RMF_MGS_TARGET_INFO =
 791         DEFINE_MSGF("mgs_target_info", 0,
 792                     sizeof(struct mgs_target_info),
 793                     lustre_swab_mgs_target_info, NULL);
 794 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 795
 796 struct req_msg_field RMF_MGS_SEND_PARAM =
 797         DEFINE_MSGF("mgs_send_param", 0,
 798                     sizeof(struct mgs_send_param),
 799                     NULL, NULL);
 800 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 801
 802 struct req_msg_field RMF_MGS_CONFIG_BODY =
 803         DEFINE_MSGF("mgs_config_read request", 0,
 804                     sizeof(struct mgs_config_body),
 805                     lustre_swab_mgs_config_body, NULL);
 806 EXPORT_SYMBOL(RMF_MGS_CONFIG_BODY);
 807
 808 struct req_msg_field RMF_MGS_CONFIG_RES =
 809         DEFINE_MSGF("mgs_config_read reply ", 0,
 810                     sizeof(struct mgs_config_res),
 811                     lustre_swab_mgs_config_res, NULL);
 812 EXPORT_SYMBOL(RMF_MGS_CONFIG_RES);
 813
 814 struct req_msg_field RMF_U32 =
 815         DEFINE_MSGF("generic u32", 0,
 816                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 817 EXPORT_SYMBOL(RMF_U32);
 818
 819 struct req_msg_field RMF_SETINFO_VAL =
 820         DEFINE_MSGF("setinfo_val", 0, -1, NULL, NULL);
 821 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 822
 823 struct req_msg_field RMF_GETINFO_KEY =
 824         DEFINE_MSGF("getinfo_key", 0, -1, NULL, NULL);
 825 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 826
 827 struct req_msg_field RMF_GETINFO_VALLEN =
 828         DEFINE_MSGF("getinfo_vallen", 0,
 829                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 830 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 831
 832 struct req_msg_field RMF_GETINFO_VAL =
 833         DEFINE_MSGF("getinfo_val", 0, -1, NULL, NULL);
 834 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 835
 836 struct req_msg_field RMF_SEQ_OPC =
 837         DEFINE_MSGF("seq_query_opc", 0,
 838                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 839 EXPORT_SYMBOL(RMF_SEQ_OPC);
 840
 841 struct req_msg_field RMF_SEQ_RANGE =
 842         DEFINE_MSGF("seq_query_range", 0,
 843                     sizeof(struct lu_seq_range),
 844                     lustre_swab_lu_seq_range, NULL);
 845 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 846
 847 struct req_msg_field RMF_FLD_OPC =
 848         DEFINE_MSGF("fld_query_opc", 0,
 849                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 850 EXPORT_SYMBOL(RMF_FLD_OPC);
 851
 852 struct req_msg_field RMF_FLD_MDFLD =
 853         DEFINE_MSGF("fld_query_mdfld", 0,
 854                     sizeof(struct lu_seq_range),
 855                     lustre_swab_lu_seq_range, NULL);
 856 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 857
 858 struct req_msg_field RMF_MDT_BODY =
 859         DEFINE_MSGF("mdt_body", 0,
 860                     sizeof(struct mdt_body), lustre_swab_mdt_body, NULL);
 861 EXPORT_SYMBOL(RMF_MDT_BODY);
 862
 863 struct req_msg_field RMF_OBD_QUOTACTL =
 864         DEFINE_MSGF("obd_quotactl", 0,
 865                     sizeof(struct obd_quotactl),
 866                     lustre_swab_obd_quotactl, NULL);
 867 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 868
 869 struct req_msg_field RMF_MDT_EPOCH =
 870         DEFINE_MSGF("mdt_ioepoch", 0,
 871                     sizeof(struct mdt_ioepoch), lustre_swab_mdt_ioepoch, NULL);
 872 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 873
 874 struct req_msg_field RMF_PTLRPC_BODY =
 875         DEFINE_MSGF("ptlrpc_body", 0,
 876                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body, NULL);
 877 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 878
 879 struct req_msg_field RMF_CLOSE_DATA =
 880         DEFINE_MSGF("data_version", 0,
 881                     sizeof(struct close_data), lustre_swab_close_data, NULL);
 882 EXPORT_SYMBOL(RMF_CLOSE_DATA);
 883
 884 struct req_msg_field RMF_OBD_STATFS =
 885         DEFINE_MSGF("obd_statfs", 0,
 886                     sizeof(struct obd_statfs), lustre_swab_obd_statfs, NULL);
 887 EXPORT_SYMBOL(RMF_OBD_STATFS);
 888
 889 struct req_msg_field RMF_SETINFO_KEY =
 890         DEFINE_MSGF("setinfo_key", 0, -1, NULL, NULL);
 891 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 892
 893 struct req_msg_field RMF_NAME =
 894         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL, NULL);
 895 EXPORT_SYMBOL(RMF_NAME);
 896
 897 struct req_msg_field RMF_SYMTGT =
 898         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL, NULL);
 899 EXPORT_SYMBOL(RMF_SYMTGT);
 900
 901 struct req_msg_field RMF_TGTUUID =
 902         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 903                     NULL);
 904 EXPORT_SYMBOL(RMF_TGTUUID);
 905
 906 struct req_msg_field RMF_CLUUID =
 907         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 908                     NULL);
 909 EXPORT_SYMBOL(RMF_CLUUID);
 910
 911 struct req_msg_field RMF_STRING =
 912         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL, NULL);
 913 EXPORT_SYMBOL(RMF_STRING);
 914
 915 struct req_msg_field RMF_LLOGD_BODY =
 916         DEFINE_MSGF("llogd_body", 0,
 917                     sizeof(struct llogd_body), lustre_swab_llogd_body, NULL);
 918 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 919
 920 struct req_msg_field RMF_LLOG_LOG_HDR =
 921         DEFINE_MSGF("llog_log_hdr", 0,
 922                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr, NULL);
 923 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 924
 925 struct req_msg_field RMF_LLOGD_CONN_BODY =
 926         DEFINE_MSGF("llogd_conn_body", 0,
 927                     sizeof(struct llogd_conn_body),
 928                     lustre_swab_llogd_conn_body, NULL);
 929 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 930
 931 /*
 932  * connection handle received in MDS_CONNECT request.
 933  *
 934  * No swabbing needed because struct lustre_handle contains only a 64-bit cookie
 935  * that the client does not interpret at all.
 936  */
 937 struct req_msg_field RMF_CONN =
 938         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL, NULL);
 939 EXPORT_SYMBOL(RMF_CONN);
 940
 941 struct req_msg_field RMF_CONNECT_DATA =
 942         DEFINE_MSGF("cdata",
 943                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
 944                     sizeof(struct obd_connect_data),
 945                     lustre_swab_connect, NULL);
 946 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 947
 948 struct req_msg_field RMF_DLM_REQ =
 949         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
 950                     sizeof(struct ldlm_request),
 951                     lustre_swab_ldlm_request, NULL);
 952 EXPORT_SYMBOL(RMF_DLM_REQ);
 953
 954 struct req_msg_field RMF_DLM_REP =
 955         DEFINE_MSGF("dlm_rep", 0,
 956                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply, NULL);
 957 EXPORT_SYMBOL(RMF_DLM_REP);
 958
 959 struct req_msg_field RMF_LDLM_INTENT =
 960         DEFINE_MSGF("ldlm_intent", 0,
 961                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent, NULL);
 962 EXPORT_SYMBOL(RMF_LDLM_INTENT);
 963
 964 struct req_msg_field RMF_DLM_LVB =
 965         DEFINE_MSGF("dlm_lvb", 0, -1, NULL, NULL);
 966 EXPORT_SYMBOL(RMF_DLM_LVB);
 967
 968 struct req_msg_field RMF_DLM_GL_DESC =
 969         DEFINE_MSGF("dlm_gl_desc", 0, sizeof(union ldlm_gl_desc),
 970                     lustre_swab_gl_desc, NULL);
 971 EXPORT_SYMBOL(RMF_DLM_GL_DESC);
 972
 973 struct req_msg_field RMF_MDT_MD =
 974         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL, NULL);
 975 EXPORT_SYMBOL(RMF_MDT_MD);
 976
 977 struct req_msg_field RMF_REC_REINT =
 978         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
 979                     lustre_swab_mdt_rec_reint, NULL);
 980 EXPORT_SYMBOL(RMF_REC_REINT);
 981
 982 /* FIXME: this length should be defined as a macro */
 983 struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1,
 984                                                     NULL, NULL);
 985 EXPORT_SYMBOL(RMF_EADATA);
 986
 987 struct req_msg_field RMF_EAVALS = DEFINE_MSGF("eavals", 0, -1, NULL, NULL);
 988 EXPORT_SYMBOL(RMF_EAVALS);
 989
 990 struct req_msg_field RMF_ACL =
 991         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
 992                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL, NULL);
 993 EXPORT_SYMBOL(RMF_ACL);
 994
 995 /* FIXME: this should be made to use RMF_F_STRUCT_ARRAY */
 996 struct req_msg_field RMF_LOGCOOKIES =
 997         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
 998                     sizeof(struct llog_cookie), NULL, NULL);
 999 EXPORT_SYMBOL(RMF_LOGCOOKIES);
1000
1001 struct req_msg_field RMF_CAPA1 =
1002         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1003                     lustre_swab_lustre_capa, NULL);
1004 EXPORT_SYMBOL(RMF_CAPA1);
1005
1006 struct req_msg_field RMF_CAPA2 =
1007         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1008                     lustre_swab_lustre_capa, NULL);
1009 EXPORT_SYMBOL(RMF_CAPA2);
1010
1011 struct req_msg_field RMF_LAYOUT_INTENT =
1012         DEFINE_MSGF("layout_intent", 0,
1013                     sizeof(struct layout_intent), lustre_swab_layout_intent,
1014                     NULL);
1015 EXPORT_SYMBOL(RMF_LAYOUT_INTENT);
1016
1017 /*
1018  * OST request field.
1019  */
1020 struct req_msg_field RMF_OST_BODY =
1021         DEFINE_MSGF("ost_body", 0,
1022                     sizeof(struct ost_body), lustre_swab_ost_body, dump_ost_body);
1023 EXPORT_SYMBOL(RMF_OST_BODY);
1024
1025 struct req_msg_field RMF_OBD_IOOBJ =
1026         DEFINE_MSGF("obd_ioobj", RMF_F_STRUCT_ARRAY,
1027                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj, dump_ioo);
1028 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
1029
1030 struct req_msg_field RMF_NIOBUF_REMOTE =
1031         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY,
1032                     sizeof(struct niobuf_remote), lustre_swab_niobuf_remote,
1033                     dump_rniobuf);
1034 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
1035
1036 struct req_msg_field RMF_RCS =
1037         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1038                     lustre_swab_generic_32s, dump_rcs);
1039 EXPORT_SYMBOL(RMF_RCS);
1040
1041 struct req_msg_field RMF_EAVALS_LENS =
1042         DEFINE_MSGF("eavals_lens", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1043                     lustre_swab_generic_32s, NULL);
1044 EXPORT_SYMBOL(RMF_EAVALS_LENS);
1045
1046 struct req_msg_field RMF_OBD_ID =
1047         DEFINE_MSGF("u64", 0,
1048                     sizeof(u64), lustre_swab_ost_last_id, NULL);
1049 EXPORT_SYMBOL(RMF_OBD_ID);
1050
1051 struct req_msg_field RMF_FID =
1052         DEFINE_MSGF("fid", 0,
1053                     sizeof(struct lu_fid), lustre_swab_lu_fid, NULL);
1054 EXPORT_SYMBOL(RMF_FID);
1055
1056 struct req_msg_field RMF_OST_ID =
1057         DEFINE_MSGF("ost_id", 0,
1058                     sizeof(struct ost_id), lustre_swab_ost_id, NULL);
1059 EXPORT_SYMBOL(RMF_OST_ID);
1060
1061 struct req_msg_field RMF_FIEMAP_KEY =
1062         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
1063                     lustre_swab_fiemap, NULL);
1064 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
1065
1066 struct req_msg_field RMF_FIEMAP_VAL =
1067         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap, NULL);
1068 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
1069
1070 struct req_msg_field RMF_HSM_USER_STATE =
1071         DEFINE_MSGF("hsm_user_state", 0, sizeof(struct hsm_user_state),
1072                     lustre_swab_hsm_user_state, NULL);
1073 EXPORT_SYMBOL(RMF_HSM_USER_STATE);
1074
1075 struct req_msg_field RMF_HSM_STATE_SET =
1076         DEFINE_MSGF("hsm_state_set", 0, sizeof(struct hsm_state_set),
1077                     lustre_swab_hsm_state_set, NULL);
1078 EXPORT_SYMBOL(RMF_HSM_STATE_SET);
1079
1080 struct req_msg_field RMF_MDS_HSM_PROGRESS =
1081         DEFINE_MSGF("hsm_progress", 0, sizeof(struct hsm_progress_kernel),
1082                     lustre_swab_hsm_progress_kernel, NULL);
1083 EXPORT_SYMBOL(RMF_MDS_HSM_PROGRESS);
1084
1085 struct req_msg_field RMF_MDS_HSM_CURRENT_ACTION =
1086         DEFINE_MSGF("hsm_current_action", 0, sizeof(struct hsm_current_action),
1087                     lustre_swab_hsm_current_action, NULL);
1088 EXPORT_SYMBOL(RMF_MDS_HSM_CURRENT_ACTION);
1089
1090 struct req_msg_field RMF_MDS_HSM_USER_ITEM =
1091         DEFINE_MSGF("hsm_user_item", RMF_F_STRUCT_ARRAY,
1092                     sizeof(struct hsm_user_item), lustre_swab_hsm_user_item,
1093                     NULL);
1094 EXPORT_SYMBOL(RMF_MDS_HSM_USER_ITEM);
1095
1096 struct req_msg_field RMF_MDS_HSM_ARCHIVE =
1097         DEFINE_MSGF("hsm_archive", 0,
1098                     sizeof(__u32), lustre_swab_generic_32s, NULL);
1099 EXPORT_SYMBOL(RMF_MDS_HSM_ARCHIVE);
1100
1101 struct req_msg_field RMF_MDS_HSM_REQUEST =
1102         DEFINE_MSGF("hsm_request", 0, sizeof(struct hsm_request),
1103                     lustre_swab_hsm_request, NULL);
1104 EXPORT_SYMBOL(RMF_MDS_HSM_REQUEST);
1105
1106 struct req_msg_field RMF_SWAP_LAYOUTS =
1107         DEFINE_MSGF("swap_layouts", 0, sizeof(struct  mdc_swap_layouts),
1108                     lustre_swab_swap_layouts, NULL);
1109 EXPORT_SYMBOL(RMF_SWAP_LAYOUTS);
1110 /*
1111  * Request formats.
1112  */
1113
1114 struct req_format {
1115         const char *rf_name;
1116         size_t rf_idx;
1117         struct {
1118                 size_t nr;
1119                 const struct req_msg_field **d;
1120         } rf_fields[RCL_NR];
1121 };
1122
1123 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
1124         .rf_name = name,                                                \
1125         .rf_fields = {                                                  \
1126                 [RCL_CLIENT] = {                                        \
1127                         .nr = client_nr,                                \
1128                         .d = client                                     \
1129                 },                                                      \
1130                 [RCL_SERVER] = {                                        \
1131                         .nr = server_nr,                                \
1132                         .d = server                                     \
1133                 }                                                       \
1134         }                                                               \
1135 }
1136
1137 #define DEFINE_REQ_FMT0(name, client, server)                             \
1138 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
1139
1140 struct req_format RQF_OBD_PING =
1141         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
1142 EXPORT_SYMBOL(RQF_OBD_PING);
1143
1144 struct req_format RQF_OBD_SET_INFO =
1145         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
1146 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
1147
1148 struct req_format RQF_SEC_CTX =
1149         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
1150 EXPORT_SYMBOL(RQF_SEC_CTX);
1151
1152 struct req_format RQF_MGS_TARGET_REG =
1153         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
1154                         mgs_target_info_only);
1155 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
1156
1157 struct req_format RQF_MGS_SET_INFO =
1158         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
1159                         mgs_set_info);
1160 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
1161
1162 struct req_format RQF_MGS_CONFIG_READ =
1163         DEFINE_REQ_FMT0("MGS_CONFIG_READ", mgs_config_read_client,
1164                         mgs_config_read_server);
1165 EXPORT_SYMBOL(RQF_MGS_CONFIG_READ);
1166
1167 struct req_format RQF_SEQ_QUERY =
1168         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
1169 EXPORT_SYMBOL(RQF_SEQ_QUERY);
1170
1171 struct req_format RQF_FLD_QUERY =
1172         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
1173 EXPORT_SYMBOL(RQF_FLD_QUERY);
1174
1175 struct req_format RQF_FLD_READ =
1176         DEFINE_REQ_FMT0("FLD_READ", fld_read_client, fld_read_server);
1177 EXPORT_SYMBOL(RQF_FLD_READ);
1178
1179 struct req_format RQF_LOG_CANCEL =
1180         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
1181 EXPORT_SYMBOL(RQF_LOG_CANCEL);
1182
1183 struct req_format RQF_MDS_QUOTACHECK =
1184         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
1185 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
1186
1187 struct req_format RQF_OST_QUOTACHECK =
1188         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
1189 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
1190
1191 struct req_format RQF_MDS_QUOTACTL =
1192         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
1193 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
1194
1195 struct req_format RQF_OST_QUOTACTL =
1196         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
1197 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
1198
1199 struct req_format RQF_QC_CALLBACK =
1200         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
1201 EXPORT_SYMBOL(RQF_QC_CALLBACK);
1202
1203 struct req_format RQF_MDS_GETSTATUS =
1204         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
1205 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
1206
1207 struct req_format RQF_MDS_STATFS =
1208         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
1209 EXPORT_SYMBOL(RQF_MDS_STATFS);
1210
1211 struct req_format RQF_MDS_SYNC =
1212         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
1213 EXPORT_SYMBOL(RQF_MDS_SYNC);
1214
1215 struct req_format RQF_MDS_GETATTR =
1216         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
1217 EXPORT_SYMBOL(RQF_MDS_GETATTR);
1218
1219 struct req_format RQF_MDS_GETXATTR =
1220         DEFINE_REQ_FMT0("MDS_GETXATTR",
1221                         mds_getxattr_client, mds_getxattr_server);
1222 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
1223
1224 struct req_format RQF_MDS_GETATTR_NAME =
1225         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
1226                         mds_getattr_name_client, mds_getattr_server);
1227 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
1228
1229 struct req_format RQF_MDS_REINT =
1230         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
1231 EXPORT_SYMBOL(RQF_MDS_REINT);
1232
1233 struct req_format RQF_MDS_REINT_CREATE =
1234         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
1235                         mds_reint_create_client, mdt_body_capa);
1236 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
1237
1238 struct req_format RQF_MDS_REINT_CREATE_ACL =
1239         DEFINE_REQ_FMT0("MDS_REINT_CREATE_ACL",
1240                         mds_reint_create_acl_client, mdt_body_capa);
1241 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_ACL);
1242
1243 struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1244         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1245                         mds_reint_create_slave_client, mdt_body_capa);
1246 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1247
1248 struct req_format RQF_MDS_REINT_CREATE_SYM =
1249         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1250                         mds_reint_create_sym_client, mdt_body_capa);
1251 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1252
1253 struct req_format RQF_MDS_REINT_OPEN =
1254         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1255                         mds_reint_open_client, mds_reint_open_server);
1256 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1257
1258 struct req_format RQF_MDS_REINT_UNLINK =
1259         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1260                         mds_last_unlink_server);
1261 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1262
1263 struct req_format RQF_MDS_REINT_LINK =
1264         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1265                         mds_reint_link_client, mdt_body_only);
1266 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1267
1268 struct req_format RQF_MDS_REINT_RENAME =
1269         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1270                         mds_last_unlink_server);
1271 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1272
1273 struct req_format RQF_MDS_REINT_SETATTR =
1274         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1275                         mds_reint_setattr_client, mds_setattr_server);
1276 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1277
1278 struct req_format RQF_MDS_REINT_SETXATTR =
1279         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1280                         mds_reint_setxattr_client, mdt_body_only);
1281 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1282
1283 struct req_format RQF_MDS_CONNECT =
1284         DEFINE_REQ_FMT0("MDS_CONNECT",
1285                         obd_connect_client, obd_connect_server);
1286 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1287
1288 struct req_format RQF_MDS_DISCONNECT =
1289         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1290 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1291
1292 struct req_format RQF_MDS_GET_INFO =
1293         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1294                         mds_getinfo_server);
1295 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1296
1297 struct req_format RQF_LDLM_ENQUEUE =
1298         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1299                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1300 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1301
1302 struct req_format RQF_LDLM_ENQUEUE_LVB =
1303         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1304                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1305 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1306
1307 struct req_format RQF_LDLM_CONVERT =
1308         DEFINE_REQ_FMT0("LDLM_CONVERT",
1309                         ldlm_enqueue_client, ldlm_enqueue_server);
1310 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1311
1312 struct req_format RQF_LDLM_CANCEL =
1313         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1314 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1315
1316 struct req_format RQF_LDLM_CALLBACK =
1317         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1318 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1319
1320 struct req_format RQF_LDLM_CP_CALLBACK =
1321         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1322 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1323
1324 struct req_format RQF_LDLM_BL_CALLBACK =
1325         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1326 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1327
1328 struct req_format RQF_LDLM_GL_CALLBACK =
1329         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1330                         ldlm_gl_callback_server);
1331 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1332
1333 struct req_format RQF_LDLM_GL_DESC_CALLBACK =
1334         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_gl_callback_desc_client,
1335                         ldlm_gl_callback_server);
1336 EXPORT_SYMBOL(RQF_LDLM_GL_DESC_CALLBACK);
1337
1338 struct req_format RQF_LDLM_INTENT_BASIC =
1339         DEFINE_REQ_FMT0("LDLM_INTENT_BASIC",
1340                         ldlm_intent_basic_client, ldlm_enqueue_lvb_server);
1341 EXPORT_SYMBOL(RQF_LDLM_INTENT_BASIC);
1342
1343 struct req_format RQF_LDLM_INTENT =
1344         DEFINE_REQ_FMT0("LDLM_INTENT",
1345                         ldlm_intent_client, ldlm_intent_server);
1346 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1347
1348 struct req_format RQF_LDLM_INTENT_LAYOUT =
1349         DEFINE_REQ_FMT0("LDLM_INTENT_LAYOUT ",
1350                         ldlm_intent_layout_client, ldlm_enqueue_lvb_server);
1351 EXPORT_SYMBOL(RQF_LDLM_INTENT_LAYOUT);
1352
1353 struct req_format RQF_LDLM_INTENT_GETATTR =
1354         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1355                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1356 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1357
1358 struct req_format RQF_LDLM_INTENT_OPEN =
1359         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1360                         ldlm_intent_open_client, ldlm_intent_open_server);
1361 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1362
1363 struct req_format RQF_LDLM_INTENT_CREATE =
1364         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1365                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1366 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1367
1368 struct req_format RQF_LDLM_INTENT_UNLINK =
1369         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1370                         ldlm_intent_unlink_client, ldlm_intent_server);
1371 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1372
1373 struct req_format RQF_LDLM_INTENT_GETXATTR =
1374         DEFINE_REQ_FMT0("LDLM_INTENT_GETXATTR",
1375                         ldlm_intent_getxattr_client,
1376                         ldlm_intent_getxattr_server);
1377 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETXATTR);
1378
1379 struct req_format RQF_MDS_CLOSE =
1380         DEFINE_REQ_FMT0("MDS_CLOSE",
1381                         mdt_close_client, mds_last_unlink_server);
1382 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1383
1384 struct req_format RQF_MDS_RELEASE_CLOSE =
1385         DEFINE_REQ_FMT0("MDS_CLOSE",
1386                         mdt_release_close_client, mds_last_unlink_server);
1387 EXPORT_SYMBOL(RQF_MDS_RELEASE_CLOSE);
1388
1389 struct req_format RQF_MDS_DONE_WRITING =
1390         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1391                         mdt_close_client, mdt_body_only);
1392 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1393
1394 struct req_format RQF_MDS_READPAGE =
1395         DEFINE_REQ_FMT0("MDS_READPAGE",
1396                         mdt_body_capa, mdt_body_only);
1397 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1398
1399 struct req_format RQF_MDS_HSM_ACTION =
1400         DEFINE_REQ_FMT0("MDS_HSM_ACTION", mdt_body_capa, mdt_hsm_action_server);
1401 EXPORT_SYMBOL(RQF_MDS_HSM_ACTION);
1402
1403 struct req_format RQF_MDS_HSM_PROGRESS =
1404         DEFINE_REQ_FMT0("MDS_HSM_PROGRESS", mdt_hsm_progress, empty);
1405 EXPORT_SYMBOL(RQF_MDS_HSM_PROGRESS);
1406
1407 struct req_format RQF_MDS_HSM_CT_REGISTER =
1408         DEFINE_REQ_FMT0("MDS_HSM_CT_REGISTER", mdt_hsm_ct_register, empty);
1409 EXPORT_SYMBOL(RQF_MDS_HSM_CT_REGISTER);
1410
1411 struct req_format RQF_MDS_HSM_CT_UNREGISTER =
1412         DEFINE_REQ_FMT0("MDS_HSM_CT_UNREGISTER", mdt_hsm_ct_unregister, empty);
1413 EXPORT_SYMBOL(RQF_MDS_HSM_CT_UNREGISTER);
1414
1415 struct req_format RQF_MDS_HSM_STATE_GET =
1416         DEFINE_REQ_FMT0("MDS_HSM_STATE_GET",
1417                         mdt_body_capa, mdt_hsm_state_get_server);
1418 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_GET);
1419
1420 struct req_format RQF_MDS_HSM_STATE_SET =
1421         DEFINE_REQ_FMT0("MDS_HSM_STATE_SET", mdt_hsm_state_set, empty);
1422 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_SET);
1423
1424 struct req_format RQF_MDS_HSM_REQUEST =
1425         DEFINE_REQ_FMT0("MDS_HSM_REQUEST", mdt_hsm_request, empty);
1426 EXPORT_SYMBOL(RQF_MDS_HSM_REQUEST);
1427
1428 struct req_format RQF_MDS_SWAP_LAYOUTS =
1429         DEFINE_REQ_FMT0("MDS_SWAP_LAYOUTS",
1430                         mdt_swap_layouts, empty);
1431 EXPORT_SYMBOL(RQF_MDS_SWAP_LAYOUTS);
1432
1433 /* This is for split */
1434 struct req_format RQF_MDS_WRITEPAGE =
1435         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1436                         mdt_body_capa, mdt_body_only);
1437 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1438
1439 struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1440         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1441                         llog_origin_handle_create_client, llogd_body_only);
1442 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1443
1444 struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1445         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1446                         llogd_body_only, llogd_body_only);
1447 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1448
1449 struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1450         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1451                         llogd_body_only, llog_origin_handle_next_block_server);
1452 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1453
1454 struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1455         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1456                         llogd_body_only, llog_origin_handle_next_block_server);
1457 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1458
1459 struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1460         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1461                         llogd_body_only, llog_log_hdr_only);
1462 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1463
1464 struct req_format RQF_LLOG_ORIGIN_CONNECT =
1465         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1466 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1467
1468 struct req_format RQF_CONNECT =
1469         DEFINE_REQ_FMT0("CONNECT", obd_connect_client, obd_connect_server);
1470 EXPORT_SYMBOL(RQF_CONNECT);
1471
1472 struct req_format RQF_OST_CONNECT =
1473         DEFINE_REQ_FMT0("OST_CONNECT",
1474                         obd_connect_client, obd_connect_server);
1475 EXPORT_SYMBOL(RQF_OST_CONNECT);
1476
1477 struct req_format RQF_OST_DISCONNECT =
1478         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1479 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1480
1481 struct req_format RQF_OST_GETATTR =
1482         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1483 EXPORT_SYMBOL(RQF_OST_GETATTR);
1484
1485 struct req_format RQF_OST_SETATTR =
1486         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1487 EXPORT_SYMBOL(RQF_OST_SETATTR);
1488
1489 struct req_format RQF_OST_CREATE =
1490         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1491 EXPORT_SYMBOL(RQF_OST_CREATE);
1492
1493 struct req_format RQF_OST_PUNCH =
1494         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1495 EXPORT_SYMBOL(RQF_OST_PUNCH);
1496
1497 struct req_format RQF_OST_SYNC =
1498         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1499 EXPORT_SYMBOL(RQF_OST_SYNC);
1500
1501 struct req_format RQF_OST_DESTROY =
1502         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1503 EXPORT_SYMBOL(RQF_OST_DESTROY);
1504
1505 struct req_format RQF_OST_BRW_READ =
1506         DEFINE_REQ_FMT0("OST_BRW_READ", ost_brw_client, ost_brw_read_server);
1507 EXPORT_SYMBOL(RQF_OST_BRW_READ);
1508
1509 struct req_format RQF_OST_BRW_WRITE =
1510         DEFINE_REQ_FMT0("OST_BRW_WRITE", ost_brw_client, ost_brw_write_server);
1511 EXPORT_SYMBOL(RQF_OST_BRW_WRITE);
1512
1513 struct req_format RQF_OST_STATFS =
1514         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1515 EXPORT_SYMBOL(RQF_OST_STATFS);
1516
1517 struct req_format RQF_OST_SET_GRANT_INFO =
1518         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", ost_grant_shrink_client,
1519                         ost_body_only);
1520 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1521
1522 struct req_format RQF_OST_GET_INFO =
1523         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1524                         ost_get_info_generic_server);
1525 EXPORT_SYMBOL(RQF_OST_GET_INFO);
1526
1527 struct req_format RQF_OST_GET_INFO_LAST_ID =
1528         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1529                         ost_get_last_id_server);
1530 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1531
1532 struct req_format RQF_OST_GET_INFO_LAST_FID =
1533         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_FID", ost_get_last_fid_client,
1534                         ost_get_last_fid_server);
1535 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_FID);
1536
1537 struct req_format RQF_OST_SET_INFO_LAST_FID =
1538         DEFINE_REQ_FMT0("OST_SET_INFO_LAST_FID", obd_set_info_client,
1539                         empty);
1540 EXPORT_SYMBOL(RQF_OST_SET_INFO_LAST_FID);
1541
1542 struct req_format RQF_OST_GET_INFO_FIEMAP =
1543         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1544                         ost_get_fiemap_server);
1545 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1546
1547 #if !defined(__REQ_LAYOUT_USER__)
1548
1549 /* Convenience macro */
1550 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1551
1552 /**
1553  * Initializes the capsule abstraction by computing and setting the \a rf_idx
1554  * field of RQFs and the \a rmf_offset field of RMFs.
1555  */
1556 int req_layout_init(void)
1557 {
1558         size_t i;
1559         size_t j;
1560         size_t k;
1561         struct req_format *rf = NULL;
1562
1563         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1564                 rf = req_formats[i];
1565                 rf->rf_idx = i;
1566                 for (j = 0; j < RCL_NR; ++j) {
1567                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1568                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1569                                 struct req_msg_field *field;
1570
1571                                 field = (typeof(field))rf->rf_fields[j].d[k];
1572                                 LASSERT(!(field->rmf_flags & RMF_F_STRUCT_ARRAY)
1573                                         || field->rmf_size > 0);
1574                                 LASSERT(field->rmf_offset[i][j] == 0);
1575                                 /*
1576                                  * k + 1 to detect unused format/field
1577                                  * combinations.
1578                                  */
1579                                 field->rmf_offset[i][j] = k + 1;
1580                         }
1581                 }
1582         }
1583         return 0;
1584 }
1585 EXPORT_SYMBOL(req_layout_init);
1586
1587 void req_layout_fini(void)
1588 {
1589 }
1590 EXPORT_SYMBOL(req_layout_fini);
1591
1592 /**
1593  * Initializes the expected sizes of each RMF in a \a pill (\a rc_area) to -1.
1594  *
1595  * Actual/expected field sizes are set elsewhere in functions in this file:
1596  * req_capsule_init(), req_capsule_server_pack(), req_capsule_set_size() and
1597  * req_capsule_msg_size().  The \a rc_area information is used by.
1598  * ptlrpc_request_set_replen().
1599  */
1600 static void req_capsule_init_area(struct req_capsule *pill)
1601 {
1602         size_t i;
1603
1604         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1605                 pill->rc_area[RCL_CLIENT][i] = -1;
1606                 pill->rc_area[RCL_SERVER][i] = -1;
1607         }
1608 }
1609
1610 /**
1611  * Initialize a pill.
1612  *
1613  * The \a location indicates whether the caller is executing on the client side
1614  * (RCL_CLIENT) or server side (RCL_SERVER)..
1615  */
1616 void req_capsule_init(struct req_capsule *pill,
1617                       struct ptlrpc_request *req,
1618                       enum req_location location)
1619 {
1620         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1621
1622         /*
1623          * Today all capsules are embedded in ptlrpc_request structs,
1624          * but just in case that ever isn't the case, we don't reach
1625          * into req unless req != NULL and pill is the one embedded in
1626          * the req.
1627          *
1628          * The req->rq_pill_init flag makes it safe to initialize a pill
1629          * twice, which might happen in the OST paths as a result of the
1630          * high-priority RPC queue getting peeked at before ost_handle()
1631          * handles an OST RPC.
1632          */
1633         if (req && pill == &req->rq_pill && req->rq_pill_init)
1634                 return;
1635
1636         memset(pill, 0, sizeof(*pill));
1637         pill->rc_req = req;
1638         pill->rc_loc = location;
1639         req_capsule_init_area(pill);
1640
1641         if (req && pill == &req->rq_pill)
1642                 req->rq_pill_init = 1;
1643 }
1644 EXPORT_SYMBOL(req_capsule_init);
1645
1646 void req_capsule_fini(struct req_capsule *pill)
1647 {
1648 }
1649 EXPORT_SYMBOL(req_capsule_fini);
1650
1651 static int __req_format_is_sane(const struct req_format *fmt)
1652 {
1653         return fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1654                 req_formats[fmt->rf_idx] == fmt;
1655 }
1656
1657 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1658                                     enum req_location loc)
1659 {
1660         struct ptlrpc_request *req;
1661
1662         req = pill->rc_req;
1663         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1664 }
1665
1666 /**
1667  * Set the format (\a fmt) of a \a pill; format changes are not allowed here
1668  * (see req_capsule_extend()).
1669  */
1670 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1671 {
1672         LASSERT(!pill->rc_fmt || pill->rc_fmt == fmt);
1673         LASSERT(__req_format_is_sane(fmt));
1674
1675         pill->rc_fmt = fmt;
1676 }
1677 EXPORT_SYMBOL(req_capsule_set);
1678
1679 /**
1680  * Fills in any parts of the \a rc_area of a \a pill that haven't been filled in
1681  * yet.
1682
1683  * \a rc_area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1684  * variable-sized fields.  The field sizes come from the declared \a rmf_size
1685  * field of a \a pill's \a rc_fmt's RMF's.
1686  */
1687 size_t req_capsule_filled_sizes(struct req_capsule *pill,
1688                                 enum req_location loc)
1689 {
1690         const struct req_format *fmt = pill->rc_fmt;
1691         size_t i;
1692
1693         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1694                 if (pill->rc_area[loc][i] == -1) {
1695                         pill->rc_area[loc][i] =
1696                                             fmt->rf_fields[loc].d[i]->rmf_size;
1697                         if (pill->rc_area[loc][i] == -1) {
1698                                 /*
1699                                  * Skip the following fields.
1700                                  *
1701                                  * If this LASSERT() trips then you're missing a
1702                                  * call to req_capsule_set_size().
1703                                  */
1704                                 LASSERT(loc != RCL_SERVER);
1705                                 break;
1706                         }
1707                 }
1708         }
1709         return i;
1710 }
1711 EXPORT_SYMBOL(req_capsule_filled_sizes);
1712
1713 /**
1714  * Capsule equivalent of lustre_pack_request() and lustre_pack_reply().
1715  *
1716  * This function uses the \a pill's \a rc_area as filled in by
1717  * req_capsule_set_size() or req_capsule_filled_sizes() (the latter is called by
1718  * this function).
1719  */
1720 int req_capsule_server_pack(struct req_capsule *pill)
1721 {
1722         const struct req_format *fmt;
1723         int count;
1724         int rc;
1725
1726         LASSERT(pill->rc_loc == RCL_SERVER);
1727         fmt = pill->rc_fmt;
1728         LASSERT(fmt);
1729
1730         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1731         rc = lustre_pack_reply(pill->rc_req, count,
1732                                pill->rc_area[RCL_SERVER], NULL);
1733         if (rc != 0) {
1734                 DEBUG_REQ(D_ERROR, pill->rc_req,
1735                           "Cannot pack %d fields in format `%s': ",
1736                           count, fmt->rf_name);
1737         }
1738         return rc;
1739 }
1740 EXPORT_SYMBOL(req_capsule_server_pack);
1741
1742 /**
1743  * Returns the PTLRPC request or reply (\a loc) buffer offset of a \a pill
1744  * corresponding to the given RMF (\a field).
1745  */
1746 static u32 __req_capsule_offset(const struct req_capsule *pill,
1747                                 const struct req_msg_field *field,
1748                                 enum req_location loc)
1749 {
1750         u32 offset;
1751
1752         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1753         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n", pill->rc_fmt->rf_name,
1754                  field->rmf_name, offset, loc);
1755         offset--;
1756
1757         LASSERT(0 <= offset && offset < REQ_MAX_FIELD_NR);
1758         return offset;
1759 }
1760
1761 /**
1762  * Helper for __req_capsule_get(); swabs value / array of values and/or dumps
1763  * them if desired.
1764  */
1765 static
1766 void
1767 swabber_dumper_helper(struct req_capsule *pill,
1768                       const struct req_msg_field *field,
1769                       enum req_location loc,
1770                       int offset,
1771                       void *value, int len, int dump, void (*swabber)(void *))
1772 {
1773         void *p;
1774         int i;
1775         int n;
1776         int do_swab;
1777         int inout = loc == RCL_CLIENT;
1778
1779         swabber = swabber ?: field->rmf_swabber;
1780
1781         if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
1782             swabber && value)
1783                 do_swab = 1;
1784         else
1785                 do_swab = 0;
1786
1787         if (!field->rmf_dumper)
1788                 dump = 0;
1789
1790         if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY)) {
1791                 if (dump) {
1792                         CDEBUG(D_RPCTRACE, "Dump of %sfield %s follows\n",
1793                                do_swab ? "unswabbed " : "", field->rmf_name);
1794                         field->rmf_dumper(value);
1795                 }
1796                 if (!do_swab)
1797                         return;
1798                 swabber(value);
1799                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1800                 if (dump && field->rmf_dumper) {
1801                         CDEBUG(D_RPCTRACE, "Dump of swabbed field %s follows\n",
1802                                field->rmf_name);
1803                         field->rmf_dumper(value);
1804                 }
1805
1806                 return;
1807         }
1808
1809         /*
1810          * We're swabbing an array; swabber() swabs a single array element, so
1811          * swab every element.
1812          */
1813         LASSERT((len % field->rmf_size) == 0);
1814         for (p = value, i = 0, n = len / field->rmf_size;
1815              i < n;
1816              i++, p += field->rmf_size) {
1817                 if (dump) {
1818                         CDEBUG(D_RPCTRACE, "Dump of %sarray field %s, element %d follows\n",
1819                                do_swab ? "unswabbed " : "", field->rmf_name, i);
1820                         field->rmf_dumper(p);
1821                 }
1822                 if (!do_swab)
1823                         continue;
1824                 swabber(p);
1825                 if (dump) {
1826                         CDEBUG(D_RPCTRACE, "Dump of swabbed array field %s, element %d follows\n",
1827                                field->rmf_name, i);
1828                         field->rmf_dumper(value);
1829                 }
1830         }
1831         if (do_swab)
1832                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1833 }
1834
1835 /**
1836  * Returns the pointer to a PTLRPC request or reply (\a loc) buffer of a \a pill
1837  * corresponding to the given RMF (\a field).
1838  *
1839  * The buffer will be swabbed using the given \a swabber.  If \a swabber == NULL
1840  * then the \a rmf_swabber from the RMF will be used.  Soon there will be no
1841  * calls to __req_capsule_get() with a non-NULL \a swabber; \a swabber will then
1842  * be removed.  Fields with the \a RMF_F_STRUCT_ARRAY flag set will have each
1843  * element of the array swabbed.
1844  */
1845 static void *__req_capsule_get(struct req_capsule *pill,
1846                                const struct req_msg_field *field,
1847                                enum req_location loc,
1848                                void (*swabber)(void *),
1849                                int dump)
1850 {
1851         const struct req_format *fmt;
1852         struct lustre_msg *msg;
1853         void *value;
1854         u32 len;
1855         u32 offset;
1856
1857         void *(*getter)(struct lustre_msg *m, u32 n, u32 minlen);
1858
1859         static const char *rcl_names[RCL_NR] = {
1860                 [RCL_CLIENT] = "client",
1861                 [RCL_SERVER] = "server"
1862         };
1863
1864         fmt = pill->rc_fmt;
1865         LASSERT(fmt);
1866         LASSERT(fmt != LP_POISON);
1867         LASSERT(__req_format_is_sane(fmt));
1868
1869         offset = __req_capsule_offset(pill, field, loc);
1870
1871         msg = __req_msg(pill, loc);
1872         LASSERT(msg);
1873
1874         getter = (field->rmf_flags & RMF_F_STRING) ?
1875                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1876
1877         if (field->rmf_flags & RMF_F_STRUCT_ARRAY) {
1878                 /*
1879                  * We've already asserted that field->rmf_size > 0 in
1880                  * req_layout_init().
1881                  */
1882                 len = lustre_msg_buflen(msg, offset);
1883                 if ((len % field->rmf_size) != 0) {
1884                         CERROR("%s: array field size mismatch %d modulo %u != 0 (%d)\n",
1885                                field->rmf_name, len, field->rmf_size, loc);
1886                         return NULL;
1887                 }
1888         } else if (pill->rc_area[loc][offset] != -1) {
1889                 len = pill->rc_area[loc][offset];
1890         } else {
1891                 len = max_t(typeof(field->rmf_size), field->rmf_size, 0);
1892         }
1893         value = getter(msg, offset, len);
1894
1895         if (!value) {
1896                 DEBUG_REQ(D_ERROR, pill->rc_req,
1897                           "Wrong buffer for field `%s' (%u of %u) in format `%s': %u vs. %u (%s)\n",
1898                           field->rmf_name, offset, lustre_msg_bufcount(msg),
1899                           fmt->rf_name, lustre_msg_buflen(msg, offset), len,
1900                           rcl_names[loc]);
1901         } else {
1902                 swabber_dumper_helper(pill, field, loc, offset, value, len,
1903                                       dump, swabber);
1904         }
1905
1906         return value;
1907 }
1908
1909 /**
1910  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC request
1911  * buffer corresponding to the given RMF (\a field) of a \a pill.
1912  */
1913 void *req_capsule_client_get(struct req_capsule *pill,
1914                              const struct req_msg_field *field)
1915 {
1916         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
1917 }
1918 EXPORT_SYMBOL(req_capsule_client_get);
1919
1920 /**
1921  * Same as req_capsule_client_get(), but with a \a swabber argument.
1922  *
1923  * Currently unused; will be removed when req_capsule_server_swab_get() is
1924  * unused too.
1925  */
1926 void *req_capsule_client_swab_get(struct req_capsule *pill,
1927                                   const struct req_msg_field *field,
1928                                   void *swabber)
1929 {
1930         return __req_capsule_get(pill, field, RCL_CLIENT, swabber, 0);
1931 }
1932 EXPORT_SYMBOL(req_capsule_client_swab_get);
1933
1934 /**
1935  * Utility that combines req_capsule_set_size() and req_capsule_client_get().
1936  *
1937  * First the \a pill's request \a field's size is set (\a rc_area) using
1938  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
1939  * returned.
1940  */
1941 void *req_capsule_client_sized_get(struct req_capsule *pill,
1942                                    const struct req_msg_field *field,
1943                                    u32 len)
1944 {
1945         req_capsule_set_size(pill, field, RCL_CLIENT, len);
1946         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
1947 }
1948 EXPORT_SYMBOL(req_capsule_client_sized_get);
1949
1950 /**
1951  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC reply
1952  * buffer corresponding to the given RMF (\a field) of a \a pill.
1953  */
1954 void *req_capsule_server_get(struct req_capsule *pill,
1955                              const struct req_msg_field *field)
1956 {
1957         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
1958 }
1959 EXPORT_SYMBOL(req_capsule_server_get);
1960
1961 /**
1962  * Same as req_capsule_server_get(), but with a \a swabber argument.
1963  *
1964  * Ideally all swabbing should be done pursuant to RMF definitions, with no
1965  * swabbing done outside this capsule abstraction.
1966  */
1967 void *req_capsule_server_swab_get(struct req_capsule *pill,
1968                                   const struct req_msg_field *field,
1969                                   void *swabber)
1970 {
1971         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
1972 }
1973 EXPORT_SYMBOL(req_capsule_server_swab_get);
1974
1975 /**
1976  * Utility that combines req_capsule_set_size() and req_capsule_server_get().
1977  *
1978  * First the \a pill's request \a field's size is set (\a rc_area) using
1979  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
1980  * returned.
1981  */
1982 void *req_capsule_server_sized_get(struct req_capsule *pill,
1983                                    const struct req_msg_field *field,
1984                                    u32 len)
1985 {
1986         req_capsule_set_size(pill, field, RCL_SERVER, len);
1987         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
1988 }
1989 EXPORT_SYMBOL(req_capsule_server_sized_get);
1990
1991 void *req_capsule_server_sized_swab_get(struct req_capsule *pill,
1992                                         const struct req_msg_field *field,
1993                                         u32 len, void *swabber)
1994 {
1995         req_capsule_set_size(pill, field, RCL_SERVER, len);
1996         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
1997 }
1998 EXPORT_SYMBOL(req_capsule_server_sized_swab_get);
1999
2000 /**
2001  * Set the size of the PTLRPC request/reply (\a loc) buffer for the given \a
2002  * field of the given \a pill.
2003  *
2004  * This function must be used when constructing variable sized fields of a
2005  * request or reply.
2006  */
2007 void req_capsule_set_size(struct req_capsule *pill,
2008                           const struct req_msg_field *field,
2009                           enum req_location loc, u32 size)
2010 {
2011         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2012
2013         if ((size != (u32)field->rmf_size) &&
2014             (field->rmf_size != -1) &&
2015             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
2016             (size > 0)) {
2017                 u32 rmf_size = (u32)field->rmf_size;
2018
2019                 if ((field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2020                     (size % rmf_size != 0)) {
2021                         CERROR("%s: array field size mismatch %u %% %u != 0 (%d)\n",
2022                                field->rmf_name, size, rmf_size, loc);
2023                         LBUG();
2024                 } else if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2025                            size < rmf_size) {
2026                         CERROR("%s: field size mismatch %u != %u (%d)\n",
2027                                field->rmf_name, size, rmf_size, loc);
2028                         LBUG();
2029                 }
2030         }
2031
2032         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
2033 }
2034 EXPORT_SYMBOL(req_capsule_set_size);
2035
2036 /**
2037  * Return the actual PTLRPC buffer length of a request or reply (\a loc)
2038  * for the given \a pill's given \a field.
2039  *
2040  * NB: this function doesn't correspond with req_capsule_set_size(), which
2041  * actually sets the size in pill.rc_area[loc][offset], but this function
2042  * returns the message buflen[offset], maybe we should use another name.
2043  */
2044 u32 req_capsule_get_size(const struct req_capsule *pill,
2045                          const struct req_msg_field *field,
2046                          enum req_location loc)
2047 {
2048         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2049
2050         return lustre_msg_buflen(__req_msg(pill, loc),
2051                                  __req_capsule_offset(pill, field, loc));
2052 }
2053 EXPORT_SYMBOL(req_capsule_get_size);
2054
2055 /**
2056  * Wrapper around lustre_msg_size() that returns the PTLRPC size needed for the
2057  * given \a pill's request or reply (\a loc) given the field size recorded in
2058  * the \a pill's rc_area.
2059  *
2060  * See also req_capsule_set_size().
2061  */
2062 u32 req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
2063 {
2064         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
2065                                pill->rc_fmt->rf_fields[loc].nr,
2066                                pill->rc_area[loc]);
2067 }
2068
2069 /**
2070  * While req_capsule_msg_size() computes the size of a PTLRPC request or reply
2071  * (\a loc) given a \a pill's \a rc_area, this function computes the size of a
2072  * PTLRPC request or reply given only an RQF (\a fmt).
2073  *
2074  * This function should not be used for formats which contain variable size
2075  * fields.
2076  */
2077 u32 req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
2078                          enum req_location loc)
2079 {
2080         size_t i = 0;
2081         u32 size;
2082
2083         /*
2084          * This function should probably LASSERT() that fmt has no fields with
2085          * RMF_F_STRUCT_ARRAY in rmf_flags, since we can't know here how many
2086          * elements in the array there will ultimately be, but then, we could
2087          * assume that there will be at least one element, and that's just what
2088          * we do.
2089          */
2090         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
2091         if (!size)
2092                 return size;
2093
2094         for (; i < fmt->rf_fields[loc].nr; ++i)
2095                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
2096                         size += cfs_size_round(fmt->rf_fields[loc].d[i]->
2097                                                rmf_size);
2098         return size;
2099 }
2100
2101 /**
2102  * Changes the format of an RPC.
2103  *
2104  * The pill must already have been initialized, which means that it already has
2105  * a request format.  The new format \a fmt must be an extension of the pill's
2106  * old format.  Specifically: the new format must have as many request and reply
2107  * fields as the old one, and all fields shared by the old and new format must
2108  * be at least as large in the new format.
2109  *
2110  * The new format's fields may be of different "type" than the old format, but
2111  * only for fields that are "opaque" blobs: fields which have a) have no
2112  * \a rmf_swabber, b) \a rmf_flags == 0 or RMF_F_NO_SIZE_CHECK, and c) \a
2113  * rmf_size == -1 or \a rmf_flags == RMF_F_NO_SIZE_CHECK.  For example,
2114  * OBD_SET_INFO has a key field and an opaque value field that gets interpreted
2115  * according to the key field.  When the value, according to the key, contains a
2116  * structure (or array thereof) to be swabbed, the format should be changed to
2117  * one where the value field has \a rmf_size/rmf_flags/rmf_swabber set
2118  * accordingly.
2119  */
2120 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
2121 {
2122         int i;
2123         size_t j;
2124
2125         const struct req_format *old;
2126
2127         LASSERT(pill->rc_fmt);
2128         LASSERT(__req_format_is_sane(fmt));
2129
2130         old = pill->rc_fmt;
2131         /*
2132          * Sanity checking...
2133          */
2134         for (i = 0; i < RCL_NR; ++i) {
2135                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
2136                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
2137                         const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
2138
2139                         /* "opaque" fields can be transmogrified */
2140                         if (!ofield->rmf_swabber &&
2141                             (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
2142                             (ofield->rmf_size == -1 ||
2143                             ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
2144                                 continue;
2145                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
2146                 }
2147                 /*
2148                  * Last field in old format can be shorter than in new.
2149                  */
2150                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
2151                         FMT_FIELD(old, i, j)->rmf_size);
2152         }
2153
2154         pill->rc_fmt = fmt;
2155 }
2156 EXPORT_SYMBOL(req_capsule_extend);
2157
2158 /**
2159  * This function returns a non-zero value if the given \a field is present in
2160  * the format (\a rc_fmt) of \a pill's PTLRPC request or reply (\a loc), else it
2161  * returns 0.
2162  */
2163 int req_capsule_has_field(const struct req_capsule *pill,
2164                           const struct req_msg_field *field,
2165                           enum req_location loc)
2166 {
2167         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2168
2169         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
2170 }
2171 EXPORT_SYMBOL(req_capsule_has_field);
2172
2173 /**
2174  * Returns a non-zero value if the given \a field is present in the given \a
2175  * pill's PTLRPC request or reply (\a loc), else it returns 0.
2176  */
2177 static int req_capsule_field_present(const struct req_capsule *pill,
2178                                      const struct req_msg_field *field,
2179                                      enum req_location loc)
2180 {
2181         u32 offset;
2182
2183         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2184         LASSERT(req_capsule_has_field(pill, field, loc));
2185
2186         offset = __req_capsule_offset(pill, field, loc);
2187         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
2188 }
2189
2190 /**
2191  * This function shrinks the size of the _buffer_ of the \a pill's PTLRPC
2192  * request or reply (\a loc).
2193  *
2194  * This is not the opposite of req_capsule_extend().
2195  */
2196 void req_capsule_shrink(struct req_capsule *pill,
2197                         const struct req_msg_field *field,
2198                         u32 newlen, enum req_location loc)
2199 {
2200         const struct req_format *fmt;
2201         struct lustre_msg *msg;
2202         u32 len;
2203         int offset;
2204
2205         fmt = pill->rc_fmt;
2206         LASSERT(fmt);
2207         LASSERT(__req_format_is_sane(fmt));
2208         LASSERT(req_capsule_has_field(pill, field, loc));
2209         LASSERT(req_capsule_field_present(pill, field, loc));
2210
2211         offset = __req_capsule_offset(pill, field, loc);
2212
2213         msg = __req_msg(pill, loc);
2214         len = lustre_msg_buflen(msg, offset);
2215         LASSERTF(newlen <= len, "%s:%s, oldlen=%u, newlen=%u\n",
2216                  fmt->rf_name, field->rmf_name, len, newlen);
2217
2218         if (loc == RCL_CLIENT)
2219                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
2220                                                             1);
2221         else
2222                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
2223                                                             1);
2224 }
2225 EXPORT_SYMBOL(req_capsule_shrink);
2226
2227 /* __REQ_LAYOUT_USER__ */
2228 #endif