lustre/ptlrpc/layout.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/ptlrpc/layout.c
  37  *
  38  * Lustre Metadata Target (mdt) request handler
  39  *
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  */
  42
  43 #if !defined(__REQ_LAYOUT_USER__)
  44
  45 #ifndef EXPORT_SYMTAB
  46 # define EXPORT_SYMTAB
  47 #endif
  48 #define DEBUG_SUBSYSTEM S_RPC
  49
  50 #ifdef __KERNEL__
  51 #include <linux/module.h>
  52 #else
  53 # include <liblustre.h>
  54 #endif
  55
  56 /* LUSTRE_VERSION_CODE */
  57 #include <lustre_ver.h>
  58
  59 #include <obd_support.h>
  60 /* lustre_swab_mdt_body */
  61 #include <lustre/lustre_idl.h>
  62 /* obd2cli_tgt() (required by DEBUG_REQ()) */
  63 #include <obd.h>
  64
  65 /* __REQ_LAYOUT_USER__ */
  66 #endif
  67 /* struct ptlrpc_request, lustre_msg* */
  68 #include <lustre_req_layout.h>
  69 #include <lustre_acl.h>
  70
  71 /*
  72  * empty set of fields... for suitable definition of emptiness.
  73  */
  74 static const struct req_msg_field *empty[] = {
  75         &RMF_PTLRPC_BODY
  76 };
  77
  78 static const struct req_msg_field *mgs_target_info_only[] = {
  79         &RMF_PTLRPC_BODY,
  80         &RMF_MGS_TARGET_INFO
  81 };
  82
  83 static const struct req_msg_field *mgs_set_info[] = {
  84         &RMF_PTLRPC_BODY,
  85         &RMF_MGS_SEND_PARAM
  86 };
  87
  88 static const struct req_msg_field *log_cancel_client[] = {
  89         &RMF_PTLRPC_BODY,
  90         &RMF_LOGCOOKIES
  91 };
  92
  93 static const struct req_msg_field *mdt_body_only[] = {
  94         &RMF_PTLRPC_BODY,
  95         &RMF_MDT_BODY
  96 };
  97
  98 static const struct req_msg_field *mdt_body_capa[] = {
  99         &RMF_PTLRPC_BODY,
 100         &RMF_MDT_BODY,
 101         &RMF_CAPA1
 102 };
 103
 104 static const struct req_msg_field *quotactl_only[] = {
 105         &RMF_PTLRPC_BODY,
 106         &RMF_OBD_QUOTACTL
 107 };
 108 static const struct req_msg_field *quota_adjust_qunit_only[] = {
 109         &RMF_PTLRPC_BODY,
 110         &RMF_QUOTA_ADJUST_QUNIT
 111 };
 112
 113 static const struct req_msg_field *qunit_data_only[] = {
 114         &RMF_PTLRPC_BODY,
 115         &RMF_QUNIT_DATA
 116 };
 117
 118 static const struct req_msg_field *mdt_close_client[] = {
 119         &RMF_PTLRPC_BODY,
 120         &RMF_MDT_EPOCH,
 121         &RMF_REC_REINT,
 122         &RMF_CAPA1
 123 };
 124
 125 static const struct req_msg_field *obd_statfs_server[] = {
 126         &RMF_PTLRPC_BODY,
 127         &RMF_OBD_STATFS
 128 };
 129
 130 static const struct req_msg_field *seq_query_client[] = {
 131         &RMF_PTLRPC_BODY,
 132         &RMF_SEQ_OPC,
 133         &RMF_SEQ_RANGE
 134 };
 135
 136 static const struct req_msg_field *seq_query_server[] = {
 137         &RMF_PTLRPC_BODY,
 138         &RMF_SEQ_RANGE
 139 };
 140
 141 static const struct req_msg_field *fld_query_client[] = {
 142         &RMF_PTLRPC_BODY,
 143         &RMF_FLD_OPC,
 144         &RMF_FLD_MDFLD
 145 };
 146
 147 static const struct req_msg_field *fld_query_server[] = {
 148         &RMF_PTLRPC_BODY,
 149         &RMF_FLD_MDFLD
 150 };
 151
 152 static const struct req_msg_field *mds_getattr_name_client[] = {
 153         &RMF_PTLRPC_BODY,
 154         &RMF_MDT_BODY,
 155         &RMF_CAPA1,
 156         &RMF_NAME
 157 };
 158
 159 static const struct req_msg_field *mds_reint_client[] = {
 160         &RMF_PTLRPC_BODY,
 161         &RMF_REC_REINT
 162 };
 163
 164 static const struct req_msg_field *mds_reint_create_client[] = {
 165         &RMF_PTLRPC_BODY,
 166         &RMF_REC_REINT,
 167         &RMF_CAPA1,
 168         &RMF_NAME
 169 };
 170
 171 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 172         &RMF_PTLRPC_BODY,
 173         &RMF_REC_REINT,
 174         &RMF_CAPA1,
 175         &RMF_NAME,
 176         &RMF_EADATA,
 177         &RMF_DLM_REQ
 178 };
 179
 180 static const struct req_msg_field *mds_reint_create_rmt_acl_client[] = {
 181         &RMF_PTLRPC_BODY,
 182         &RMF_REC_REINT,
 183         &RMF_CAPA1,
 184         &RMF_NAME,
 185         &RMF_EADATA,
 186         &RMF_DLM_REQ
 187 };
 188
 189 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 190         &RMF_PTLRPC_BODY,
 191         &RMF_REC_REINT,
 192         &RMF_CAPA1,
 193         &RMF_NAME,
 194         &RMF_SYMTGT,
 195         &RMF_DLM_REQ
 196 };
 197
 198 static const struct req_msg_field *mds_reint_open_client[] = {
 199         &RMF_PTLRPC_BODY,
 200         &RMF_REC_REINT,
 201         &RMF_CAPA1,
 202         &RMF_CAPA2,
 203         &RMF_NAME,
 204         &RMF_EADATA
 205 };
 206
 207 static const struct req_msg_field *mds_reint_open_server[] = {
 208         &RMF_PTLRPC_BODY,
 209         &RMF_MDT_BODY,
 210         &RMF_MDT_MD,
 211         &RMF_ACL,
 212         &RMF_CAPA1,
 213         &RMF_CAPA2
 214 };
 215
 216 static const struct req_msg_field *mds_reint_unlink_client[] = {
 217         &RMF_PTLRPC_BODY,
 218         &RMF_REC_REINT,
 219         &RMF_CAPA1,
 220         &RMF_NAME,
 221         &RMF_DLM_REQ
 222 };
 223
 224 static const struct req_msg_field *mds_reint_link_client[] = {
 225         &RMF_PTLRPC_BODY,
 226         &RMF_REC_REINT,
 227         &RMF_CAPA1,
 228         &RMF_CAPA2,
 229         &RMF_NAME,
 230         &RMF_DLM_REQ
 231 };
 232
 233 static const struct req_msg_field *mds_reint_rename_client[] = {
 234         &RMF_PTLRPC_BODY,
 235         &RMF_REC_REINT,
 236         &RMF_CAPA1,
 237         &RMF_CAPA2,
 238         &RMF_NAME,
 239         &RMF_SYMTGT,
 240         &RMF_DLM_REQ
 241 };
 242
 243 static const struct req_msg_field *mds_last_unlink_server[] = {
 244         &RMF_PTLRPC_BODY,
 245         &RMF_MDT_BODY,
 246         &RMF_MDT_MD,
 247         &RMF_LOGCOOKIES,
 248         &RMF_CAPA1,
 249         &RMF_CAPA2
 250 };
 251
 252 static const struct req_msg_field *mds_reint_setattr_client[] = {
 253         &RMF_PTLRPC_BODY,
 254         &RMF_REC_REINT,
 255         &RMF_CAPA1,
 256         &RMF_MDT_EPOCH,
 257         &RMF_EADATA,
 258         &RMF_LOGCOOKIES,
 259         &RMF_DLM_REQ
 260 };
 261
 262 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 263         &RMF_PTLRPC_BODY,
 264         &RMF_REC_REINT,
 265         &RMF_CAPA1,
 266         &RMF_NAME,
 267         &RMF_EADATA
 268 };
 269
 270 static const struct req_msg_field *obd_connect_client[] = {
 271         &RMF_PTLRPC_BODY,
 272         &RMF_TGTUUID,
 273         &RMF_CLUUID,
 274         &RMF_CONN,
 275         &RMF_CONNECT_DATA
 276 };
 277
 278 static const struct req_msg_field *obd_connect_server[] = {
 279         &RMF_PTLRPC_BODY,
 280         &RMF_CONNECT_DATA
 281 };
 282
 283 static const struct req_msg_field *obd_set_info_client[] = {
 284         &RMF_PTLRPC_BODY,
 285         &RMF_SETINFO_KEY,
 286         &RMF_SETINFO_VAL
 287 };
 288
 289 static const struct req_msg_field *mds_getinfo_client[] = {
 290         &RMF_PTLRPC_BODY,
 291         &RMF_GETINFO_KEY,
 292         &RMF_GETINFO_VALLEN
 293 };
 294
 295 static const struct req_msg_field *mds_getinfo_server[] = {
 296         &RMF_PTLRPC_BODY,
 297         &RMF_GETINFO_VAL,
 298 };
 299
 300 static const struct req_msg_field *ldlm_enqueue_client[] = {
 301         &RMF_PTLRPC_BODY,
 302         &RMF_DLM_REQ
 303 };
 304
 305 static const struct req_msg_field *ldlm_enqueue_server[] = {
 306         &RMF_PTLRPC_BODY,
 307         &RMF_DLM_REP
 308 };
 309
 310 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 311         &RMF_PTLRPC_BODY,
 312         &RMF_DLM_REP,
 313         &RMF_DLM_LVB
 314 };
 315
 316 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 317         &RMF_PTLRPC_BODY,
 318         &RMF_DLM_REQ,
 319         &RMF_DLM_LVB
 320 };
 321
 322 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 323         &RMF_PTLRPC_BODY,
 324         &RMF_DLM_LVB
 325 };
 326
 327 static const struct req_msg_field *ldlm_intent_client[] = {
 328         &RMF_PTLRPC_BODY,
 329         &RMF_DLM_REQ,
 330         &RMF_LDLM_INTENT,
 331         &RMF_REC_REINT
 332 };
 333
 334 static const struct req_msg_field *ldlm_intent_server[] = {
 335         &RMF_PTLRPC_BODY,
 336         &RMF_DLM_REP,
 337         &RMF_MDT_BODY,
 338         &RMF_MDT_MD,
 339         &RMF_ACL
 340 };
 341
 342 static const struct req_msg_field *ldlm_intent_open_server[] = {
 343         &RMF_PTLRPC_BODY,
 344         &RMF_DLM_REP,
 345         &RMF_MDT_BODY,
 346         &RMF_MDT_MD,
 347         &RMF_ACL,
 348         &RMF_CAPA1,
 349         &RMF_CAPA2
 350 };
 351
 352 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 353         &RMF_PTLRPC_BODY,
 354         &RMF_DLM_REQ,
 355         &RMF_LDLM_INTENT,
 356         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 357         &RMF_CAPA1,
 358         &RMF_NAME
 359 };
 360
 361 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 362         &RMF_PTLRPC_BODY,
 363         &RMF_DLM_REP,
 364         &RMF_MDT_BODY,
 365         &RMF_MDT_MD,
 366         &RMF_ACL,
 367         &RMF_CAPA1
 368 };
 369
 370 static const struct req_msg_field *ldlm_intent_create_client[] = {
 371         &RMF_PTLRPC_BODY,
 372         &RMF_DLM_REQ,
 373         &RMF_LDLM_INTENT,
 374         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 375         &RMF_CAPA1,
 376         &RMF_NAME,
 377         &RMF_EADATA
 378 };
 379
 380 static const struct req_msg_field *ldlm_intent_open_client[] = {
 381         &RMF_PTLRPC_BODY,
 382         &RMF_DLM_REQ,
 383         &RMF_LDLM_INTENT,
 384         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 385         &RMF_CAPA1,
 386         &RMF_CAPA2,
 387         &RMF_NAME,
 388         &RMF_EADATA,
 389         &RMF_REC_JOINFILE
 390 };
 391
 392 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 393         &RMF_PTLRPC_BODY,
 394         &RMF_DLM_REQ,
 395         &RMF_LDLM_INTENT,
 396         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 397         &RMF_CAPA1,
 398         &RMF_NAME
 399 };
 400
 401 static const struct req_msg_field *mds_getxattr_client[] = {
 402         &RMF_PTLRPC_BODY,
 403         &RMF_MDT_BODY,
 404         &RMF_CAPA1,
 405         &RMF_NAME,
 406         &RMF_EADATA
 407 };
 408
 409 static const struct req_msg_field *mds_getxattr_server[] = {
 410         &RMF_PTLRPC_BODY,
 411         &RMF_MDT_BODY,
 412         &RMF_EADATA
 413 };
 414
 415 static const struct req_msg_field *mds_getattr_server[] = {
 416         &RMF_PTLRPC_BODY,
 417         &RMF_MDT_BODY,
 418         &RMF_MDT_MD,
 419         &RMF_ACL,
 420         &RMF_CAPA1,
 421         &RMF_CAPA2
 422 };
 423
 424 static const struct req_msg_field *mds_setattr_server[] = {
 425         &RMF_PTLRPC_BODY,
 426         &RMF_MDT_BODY,
 427         &RMF_MDT_MD,
 428         &RMF_ACL,
 429         &RMF_CAPA1,
 430         &RMF_CAPA2
 431 };
 432
 433 static const struct req_msg_field *llog_catinfo_client[] = {
 434         &RMF_PTLRPC_BODY,
 435         &RMF_NAME,
 436         &RMF_STRING
 437 };
 438
 439 static const struct req_msg_field *llog_catinfo_server[] = {
 440         &RMF_PTLRPC_BODY,
 441         &RMF_STRING
 442 };
 443
 444 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 445         &RMF_PTLRPC_BODY,
 446         &RMF_LLOGD_BODY,
 447         &RMF_NAME
 448 };
 449
 450 static const struct req_msg_field *llogd_body_only[] = {
 451         &RMF_PTLRPC_BODY,
 452         &RMF_LLOGD_BODY
 453 };
 454
 455 static const struct req_msg_field *llog_log_hdr_only[] = {
 456         &RMF_PTLRPC_BODY,
 457         &RMF_LLOG_LOG_HDR
 458 };
 459
 460 static const struct req_msg_field *llogd_conn_body_only[] = {
 461         &RMF_PTLRPC_BODY,
 462         &RMF_LLOGD_CONN_BODY
 463 };
 464
 465 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 466         &RMF_PTLRPC_BODY,
 467         &RMF_LLOGD_BODY,
 468         &RMF_EADATA
 469 };
 470
 471 static const struct req_msg_field *ost_body_only[] = {
 472         &RMF_PTLRPC_BODY,
 473         &RMF_OST_BODY
 474 };
 475
 476 static const struct req_msg_field *ost_body_capa[] = {
 477         &RMF_PTLRPC_BODY,
 478         &RMF_OST_BODY,
 479         &RMF_CAPA1
 480 };
 481
 482 static const struct req_msg_field *ost_destroy_client[] = {
 483         &RMF_PTLRPC_BODY,
 484         &RMF_OST_BODY,
 485         &RMF_DLM_REQ,
 486         &RMF_CAPA1
 487 };
 488
 489
 490 static const struct req_msg_field *ost_brw_client[] = {
 491         &RMF_PTLRPC_BODY,
 492         &RMF_OST_BODY,
 493         &RMF_OBD_IOOBJ,
 494         &RMF_NIOBUF_REMOTE,
 495         &RMF_CAPA1
 496 };
 497
 498 static const struct req_msg_field *ost_brw_server[] = {
 499         &RMF_PTLRPC_BODY,
 500         &RMF_OST_BODY,
 501         &RMF_NIOBUF_REMOTE
 502 };
 503
 504 static const struct req_msg_field *ost_get_info_generic_server[] = {
 505         &RMF_PTLRPC_BODY,
 506         &RMF_GENERIC_DATA,
 507 };
 508
 509 static const struct req_msg_field *ost_get_info_generic_client[] = {
 510         &RMF_PTLRPC_BODY,
 511         &RMF_SETINFO_KEY
 512 };
 513
 514 static const struct req_msg_field *ost_get_last_id_server[] = {
 515         &RMF_PTLRPC_BODY,
 516         &RMF_OBD_ID
 517 };
 518
 519 static const struct req_msg_field *ost_get_fiemap_client[] = {
 520         &RMF_PTLRPC_BODY,
 521         &RMF_FIEMAP_KEY,
 522         &RMF_FIEMAP_VAL
 523 };
 524
 525 static const struct req_msg_field *ost_get_fiemap_server[] = {
 526         &RMF_PTLRPC_BODY,
 527         &RMF_FIEMAP_VAL
 528 };
 529
 530 static const struct req_format *req_formats[] = {
 531         &RQF_OBD_PING,
 532         &RQF_OBD_SET_INFO,
 533         &RQF_SEC_CTX,
 534         &RQF_MGS_TARGET_REG,
 535         &RQF_MGS_SET_INFO,
 536         &RQF_SEQ_QUERY,
 537         &RQF_FLD_QUERY,
 538         &RQF_MDS_CONNECT,
 539         &RQF_MDS_DISCONNECT,
 540         &RQF_MDS_GET_INFO,
 541         &RQF_MDS_GETSTATUS,
 542         &RQF_MDS_STATFS,
 543         &RQF_MDS_GETATTR,
 544         &RQF_MDS_GETATTR_NAME,
 545         &RQF_MDS_GETXATTR,
 546         &RQF_MDS_SYNC,
 547         &RQF_MDS_CLOSE,
 548         &RQF_MDS_PIN,
 549         &RQF_MDS_UNPIN,
 550         &RQF_MDS_READPAGE,
 551         &RQF_MDS_WRITEPAGE,
 552         &RQF_MDS_IS_SUBDIR,
 553         &RQF_MDS_DONE_WRITING,
 554         &RQF_MDS_REINT,
 555         &RQF_MDS_REINT_CREATE,
 556         &RQF_MDS_REINT_CREATE_RMT_ACL,
 557         &RQF_MDS_REINT_CREATE_SLAVE,
 558         &RQF_MDS_REINT_CREATE_SYM,
 559         &RQF_MDS_REINT_OPEN,
 560         &RQF_MDS_REINT_UNLINK,
 561         &RQF_MDS_REINT_LINK,
 562         &RQF_MDS_REINT_RENAME,
 563         &RQF_MDS_REINT_SETATTR,
 564         &RQF_MDS_REINT_SETXATTR,
 565         &RQF_MDS_QUOTACHECK,
 566         &RQF_MDS_QUOTACTL,
 567         &RQF_MDS_QUOTA_DQACQ,
 568         &RQF_QC_CALLBACK,
 569         &RQF_OST_CONNECT,
 570         &RQF_OST_DISCONNECT,
 571         &RQF_OST_QUOTACHECK,
 572         &RQF_OST_QUOTACTL,
 573         &RQF_OST_QUOTA_ADJUST_QUNIT,
 574         &RQF_OST_GETATTR,
 575         &RQF_OST_SETATTR,
 576         &RQF_OST_CREATE,
 577         &RQF_OST_PUNCH,
 578         &RQF_OST_SYNC,
 579         &RQF_OST_DESTROY,
 580         &RQF_OST_BRW,
 581         &RQF_OST_STATFS,
 582         &RQF_OST_SET_GRANT_INFO,
 583         &RQF_OST_GET_INFO_GENERIC,
 584         &RQF_OST_GET_INFO_LAST_ID,
 585         &RQF_OST_GET_INFO_FIEMAP,
 586         &RQF_LDLM_ENQUEUE,
 587         &RQF_LDLM_ENQUEUE_LVB,
 588         &RQF_LDLM_CONVERT,
 589         &RQF_LDLM_CANCEL,
 590         &RQF_LDLM_CALLBACK,
 591         &RQF_LDLM_CP_CALLBACK,
 592         &RQF_LDLM_BL_CALLBACK,
 593         &RQF_LDLM_GL_CALLBACK,
 594         &RQF_LDLM_INTENT,
 595         &RQF_LDLM_INTENT_GETATTR,
 596         &RQF_LDLM_INTENT_OPEN,
 597         &RQF_LDLM_INTENT_CREATE,
 598         &RQF_LDLM_INTENT_UNLINK,
 599         &RQF_LOG_CANCEL,
 600         &RQF_LLOG_CATINFO,
 601         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 602         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 603         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 604         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 605         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 606         &RQF_LLOG_ORIGIN_CONNECT
 607 };
 608
 609 struct req_msg_field {
 610         __u32       rmf_flags;
 611         const char *rmf_name;
 612         /**
 613          * Field length. (-1) means "variable length".
 614          */
 615         int         rmf_size;
 616         void      (*rmf_swabber)(void *);
 617         int         rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 618 };
 619
 620 enum rmf_flags {
 621         RMF_F_STRING = 1 << 0,
 622         RMF_F_NO_SIZE_CHECK = 1 << 1
 623 };
 624
 625 struct req_capsule;
 626
 627 /*
 628  * Request fields.
 629  */
 630 #define DEFINE_MSGF(name, flags, size, swabber) {       \
 631         .rmf_name    = (name),                          \
 632         .rmf_flags   = (flags),                         \
 633         .rmf_size    = (size),                          \
 634         .rmf_swabber = (void (*)(void*))(swabber)       \
 635 }
 636
 637 const struct req_msg_field RMF_GENERIC_DATA =
 638         DEFINE_MSGF("generic_data", 0,
 639                     -1, NULL);
 640 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 641
 642 const struct req_msg_field RMF_MGS_TARGET_INFO =
 643         DEFINE_MSGF("mgs_target_info", 0,
 644                     sizeof(struct mgs_target_info),
 645                     lustre_swab_mgs_target_info);
 646 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 647
 648 const struct req_msg_field RMF_MGS_SEND_PARAM =
 649         DEFINE_MSGF("mgs_send_param", 0,
 650                     sizeof(struct mgs_send_param),
 651                     NULL);
 652 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 653
 654 const struct req_msg_field RMF_SETINFO_VAL =
 655         DEFINE_MSGF("setinfo_val", 0, -1, NULL);
 656 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 657
 658 const struct req_msg_field RMF_GETINFO_KEY =
 659         DEFINE_MSGF("getinfo_key", 0, -1, NULL);
 660 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 661
 662 const struct req_msg_field RMF_GETINFO_VALLEN =
 663         DEFINE_MSGF("getinfo_vallen", 0,
 664                     sizeof(__u32), lustre_swab_generic_32s);
 665 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 666
 667 const struct req_msg_field RMF_GETINFO_VAL =
 668         DEFINE_MSGF("getinfo_val", 0, -1, NULL);
 669 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 670
 671 const struct req_msg_field RMF_SEQ_OPC =
 672         DEFINE_MSGF("seq_query_opc", 0,
 673                     sizeof(__u32), lustre_swab_generic_32s);
 674 EXPORT_SYMBOL(RMF_SEQ_OPC);
 675
 676 const struct req_msg_field RMF_SEQ_RANGE =
 677         DEFINE_MSGF("seq_query_range", 0,
 678                     sizeof(struct lu_seq_range), lustre_swab_lu_seq_range);
 679 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 680
 681 const struct req_msg_field RMF_FLD_OPC =
 682         DEFINE_MSGF("fld_query_opc", 0,
 683                     sizeof(__u32), lustre_swab_generic_32s);
 684 EXPORT_SYMBOL(RMF_FLD_OPC);
 685
 686 const struct req_msg_field RMF_FLD_MDFLD =
 687         DEFINE_MSGF("fld_query_mdfld", 0,
 688                     sizeof(struct lu_seq_range), lustre_swab_lu_seq_range);
 689 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 690
 691 const struct req_msg_field RMF_MDT_BODY =
 692         DEFINE_MSGF("mdt_body", 0,
 693                     sizeof(struct mdt_body), lustre_swab_mdt_body);
 694 EXPORT_SYMBOL(RMF_MDT_BODY);
 695
 696 const struct req_msg_field RMF_OBD_QUOTACTL =
 697         DEFINE_MSGF("obd_quotactl", 0,
 698                     sizeof(struct obd_quotactl), lustre_swab_obd_quotactl);
 699 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 700
 701 const struct req_msg_field RMF_QUOTA_ADJUST_QUNIT =
 702         DEFINE_MSGF("quota_adjust_qunit", 0,
 703                     sizeof(struct quota_adjust_qunit),
 704                     lustre_swab_quota_adjust_qunit);
 705 EXPORT_SYMBOL(RMF_QUOTA_ADJUST_QUNIT);
 706
 707 const struct req_msg_field RMF_QUNIT_DATA =
 708         DEFINE_MSGF("qunit_data", 0,
 709                     sizeof(struct qunit_data), NULL);
 710 EXPORT_SYMBOL(RMF_QUNIT_DATA);
 711
 712 const struct req_msg_field RMF_MDT_EPOCH =
 713         DEFINE_MSGF("mdt_epoch", 0,
 714                     sizeof(struct mdt_epoch), lustre_swab_mdt_epoch);
 715 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 716
 717 const struct req_msg_field RMF_PTLRPC_BODY =
 718         DEFINE_MSGF("ptlrpc_body", 0,
 719                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body);
 720 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 721
 722 const struct req_msg_field RMF_OBD_STATFS =
 723         DEFINE_MSGF("obd_statfs", 0,
 724                     sizeof(struct obd_statfs), lustre_swab_obd_statfs);
 725 EXPORT_SYMBOL(RMF_OBD_STATFS);
 726
 727 const struct req_msg_field RMF_SETINFO_KEY =
 728         DEFINE_MSGF("setinfo_key", 0, -1, NULL);
 729 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 730
 731 const struct req_msg_field RMF_NAME =
 732         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL);
 733 EXPORT_SYMBOL(RMF_NAME);
 734
 735 const struct req_msg_field RMF_SYMTGT =
 736         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL);
 737 EXPORT_SYMBOL(RMF_SYMTGT);
 738
 739 const struct req_msg_field RMF_TGTUUID =
 740         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 741 EXPORT_SYMBOL(RMF_TGTUUID);
 742
 743 const struct req_msg_field RMF_CLUUID =
 744         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 745 EXPORT_SYMBOL(RMF_CLUUID);
 746
 747 const struct req_msg_field RMF_STRING =
 748         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL);
 749 EXPORT_SYMBOL(RMF_STRING);
 750
 751 const struct req_msg_field RMF_LLOGD_BODY =
 752         DEFINE_MSGF("llogd_body", 0,
 753                     sizeof(struct llogd_body), lustre_swab_llogd_body);
 754 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 755
 756 const struct req_msg_field RMF_LLOG_LOG_HDR =
 757         DEFINE_MSGF("llog_log_hdr", 0,
 758                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr);
 759 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 760
 761 const struct req_msg_field RMF_LLOGD_CONN_BODY =
 762         DEFINE_MSGF("llogd_conn_body", 0,
 763                     sizeof(struct llogd_conn_body),
 764                     lustre_swab_llogd_conn_body);
 765 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 766
 767 /*
 768  * connection handle received in MDS_CONNECT request.
 769  *
 770  * XXX no swabbing?
 771  */
 772 const struct req_msg_field RMF_CONN =
 773         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL);
 774 EXPORT_SYMBOL(RMF_CONN);
 775
 776 const struct req_msg_field RMF_CONNECT_DATA =
 777         DEFINE_MSGF("cdata",
 778                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
 779                     sizeof(struct obd_connect_data), lustre_swab_connect);
 780 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 781
 782 const struct req_msg_field RMF_DLM_REQ =
 783         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
 784                     sizeof(struct ldlm_request), lustre_swab_ldlm_request);
 785 EXPORT_SYMBOL(RMF_DLM_REQ);
 786
 787 const struct req_msg_field RMF_DLM_REP =
 788         DEFINE_MSGF("dlm_rep", 0,
 789                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply);
 790 EXPORT_SYMBOL(RMF_DLM_REP);
 791
 792 const struct req_msg_field RMF_LDLM_INTENT =
 793         DEFINE_MSGF("ldlm_intent", 0,
 794                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent);
 795 EXPORT_SYMBOL(RMF_LDLM_INTENT);
 796
 797 const struct req_msg_field RMF_DLM_LVB =
 798         DEFINE_MSGF("dlm_lvb", 0, sizeof(struct ost_lvb), NULL);
 799 EXPORT_SYMBOL(RMF_DLM_LVB);
 800
 801 const struct req_msg_field RMF_MDT_MD =
 802         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL);
 803 EXPORT_SYMBOL(RMF_MDT_MD);
 804
 805 const struct req_msg_field RMF_REC_REINT =
 806         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
 807                     lustre_swab_mdt_rec_reint);
 808 EXPORT_SYMBOL(RMF_REC_REINT);
 809
 810 const struct req_msg_field RMF_REC_JOINFILE =
 811         DEFINE_MSGF("rec_joinfile", 0, sizeof(struct mdt_rec_join),
 812                     lustre_swab_mdt_rec_join);
 813 EXPORT_SYMBOL(RMF_REC_JOINFILE);
 814
 815 /* FIXME: this length should be defined as a macro */
 816 const struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1, NULL);
 817 EXPORT_SYMBOL(RMF_EADATA);
 818
 819 const struct req_msg_field RMF_ACL =
 820         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
 821                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL);
 822 EXPORT_SYMBOL(RMF_ACL);
 823
 824 const struct req_msg_field RMF_LOGCOOKIES =
 825         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
 826                     sizeof(struct llog_cookie), NULL);
 827 EXPORT_SYMBOL(RMF_LOGCOOKIES);
 828
 829 const struct req_msg_field RMF_CAPA1 =
 830         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 831                     lustre_swab_lustre_capa);
 832 EXPORT_SYMBOL(RMF_CAPA1);
 833
 834 const struct req_msg_field RMF_CAPA2 =
 835         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 836                     lustre_swab_lustre_capa);
 837 EXPORT_SYMBOL(RMF_CAPA2);
 838
 839 /*
 840  * OST request field.
 841  */
 842 const struct req_msg_field RMF_OST_BODY =
 843         DEFINE_MSGF("ost_body", 0,
 844                     sizeof(struct ost_body), lustre_swab_ost_body);
 845 EXPORT_SYMBOL(RMF_OST_BODY);
 846
 847 const struct req_msg_field RMF_OBD_IOOBJ =
 848         DEFINE_MSGF("obd_ioobj", 0,
 849                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj);
 850 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
 851
 852 const struct req_msg_field RMF_NIOBUF_REMOTE =
 853         DEFINE_MSGF("niobuf_remote", 0, -1, lustre_swab_niobuf_remote);
 854 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
 855
 856 const struct req_msg_field RMF_OBD_ID =
 857         DEFINE_MSGF("obd_id", 0,
 858                     sizeof(obd_id), lustre_swab_ost_last_id);
 859 EXPORT_SYMBOL(RMF_OBD_ID);
 860
 861 const struct req_msg_field RMF_FIEMAP_KEY =
 862         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
 863                     lustre_swab_fiemap);
 864 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
 865
 866 const struct req_msg_field RMF_FIEMAP_VAL =
 867         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap);
 868 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
 869
 870 /*
 871  * Request formats.
 872  */
 873
 874 struct req_format {
 875         const char *rf_name;
 876         int         rf_idx;
 877         struct {
 878                 int                          nr;
 879                 const struct req_msg_field **d;
 880         } rf_fields[RCL_NR];
 881 };
 882
 883 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
 884         .rf_name   = name,                                              \
 885         .rf_fields = {                                                  \
 886                 [RCL_CLIENT] = {                                        \
 887                         .nr = client_nr,                                \
 888                         .d  = client                                    \
 889                 },                                                      \
 890                 [RCL_SERVER] = {                                        \
 891                         .nr = server_nr,                                \
 892                         .d  = server                                    \
 893                 }                                                       \
 894         }                                                               \
 895 }
 896
 897 #define DEFINE_REQ_FMT0(name, client, server)                                  \
 898 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
 899
 900 const struct req_format RQF_OBD_PING =
 901         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
 902 EXPORT_SYMBOL(RQF_OBD_PING);
 903
 904 const struct req_format RQF_OBD_SET_INFO =
 905         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
 906 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
 907
 908 const struct req_format RQF_SEC_CTX =
 909         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
 910 EXPORT_SYMBOL(RQF_SEC_CTX);
 911
 912 const struct req_format RQF_MGS_TARGET_REG =
 913         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
 914                          mgs_target_info_only);
 915 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
 916
 917 const struct req_format RQF_MGS_SET_INFO =
 918         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
 919                          mgs_set_info);
 920 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
 921
 922 const struct req_format RQF_SEQ_QUERY =
 923         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
 924 EXPORT_SYMBOL(RQF_SEQ_QUERY);
 925
 926 const struct req_format RQF_FLD_QUERY =
 927         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
 928 EXPORT_SYMBOL(RQF_FLD_QUERY);
 929
 930 const struct req_format RQF_LOG_CANCEL =
 931         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
 932 EXPORT_SYMBOL(RQF_LOG_CANCEL);
 933
 934 const struct req_format RQF_MDS_QUOTACHECK =
 935         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
 936 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
 937
 938 const struct req_format RQF_OST_QUOTACHECK =
 939         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
 940 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
 941
 942 const struct req_format RQF_MDS_QUOTACTL =
 943         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
 944 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
 945
 946 const struct req_format RQF_OST_QUOTACTL =
 947         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
 948 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
 949
 950 const struct req_format RQF_OST_QUOTA_ADJUST_QUNIT =
 951         DEFINE_REQ_FMT0("OST_QUOTA_ADJUST_QUNIT", quota_adjust_qunit_only,
 952                         quota_adjust_qunit_only);
 953 EXPORT_SYMBOL(RQF_OST_QUOTA_ADJUST_QUNIT);
 954
 955 const struct req_format RQF_QC_CALLBACK =
 956         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
 957 EXPORT_SYMBOL(RQF_QC_CALLBACK);
 958
 959 const struct req_format RQF_MDS_QUOTA_DQACQ =
 960         DEFINE_REQ_FMT0("MDS_QUOTA_DQACQ", qunit_data_only, qunit_data_only);
 961 EXPORT_SYMBOL(RQF_MDS_QUOTA_DQACQ);
 962
 963 const struct req_format RQF_MDS_GETSTATUS =
 964         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
 965 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
 966
 967 const struct req_format RQF_MDS_STATFS =
 968         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
 969 EXPORT_SYMBOL(RQF_MDS_STATFS);
 970
 971 const struct req_format RQF_MDS_SYNC =
 972         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
 973 EXPORT_SYMBOL(RQF_MDS_SYNC);
 974
 975 const struct req_format RQF_MDS_GETATTR =
 976         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
 977 EXPORT_SYMBOL(RQF_MDS_GETATTR);
 978
 979 const struct req_format RQF_MDS_GETXATTR =
 980         DEFINE_REQ_FMT0("MDS_GETXATTR",
 981                         mds_getxattr_client, mds_getxattr_server);
 982 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
 983
 984 const struct req_format RQF_MDS_GETATTR_NAME =
 985         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
 986                         mds_getattr_name_client, mds_getattr_server);
 987 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
 988
 989 const struct req_format RQF_MDS_REINT =
 990         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
 991 EXPORT_SYMBOL(RQF_MDS_REINT);
 992
 993 const struct req_format RQF_MDS_REINT_CREATE =
 994         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
 995                         mds_reint_create_client, mdt_body_capa);
 996 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
 997
 998 const struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
 999         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
1000                         mds_reint_create_rmt_acl_client, mdt_body_capa);
1001 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
1002
1003 const struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1004         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1005                         mds_reint_create_slave_client, mdt_body_capa);
1006 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1007
1008 const struct req_format RQF_MDS_REINT_CREATE_SYM =
1009         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1010                         mds_reint_create_sym_client, mdt_body_capa);
1011 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1012
1013 const struct req_format RQF_MDS_REINT_OPEN =
1014         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1015                         mds_reint_open_client, mds_reint_open_server);
1016 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1017
1018 const struct req_format RQF_MDS_REINT_UNLINK =
1019         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1020                         mds_last_unlink_server);
1021 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1022
1023 const struct req_format RQF_MDS_REINT_LINK =
1024         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1025                         mds_reint_link_client, mdt_body_only);
1026 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1027
1028 const struct req_format RQF_MDS_REINT_RENAME =
1029         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1030                         mds_last_unlink_server);
1031 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1032
1033 const struct req_format RQF_MDS_REINT_SETATTR =
1034         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1035                         mds_reint_setattr_client, mds_setattr_server);
1036 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1037
1038 const struct req_format RQF_MDS_REINT_SETXATTR =
1039         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1040                         mds_reint_setxattr_client, mdt_body_only);
1041 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1042
1043 const struct req_format RQF_MDS_CONNECT =
1044         DEFINE_REQ_FMT0("MDS_CONNECT",
1045                         obd_connect_client, obd_connect_server);
1046 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1047
1048 const struct req_format RQF_MDS_DISCONNECT =
1049         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1050 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1051
1052 const struct req_format RQF_MDS_GET_INFO =
1053         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1054                         mds_getinfo_server);
1055 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1056
1057 const struct req_format RQF_LDLM_ENQUEUE =
1058         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1059                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1060 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1061
1062 const struct req_format RQF_LDLM_ENQUEUE_LVB =
1063         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1064                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1065 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1066
1067 const struct req_format RQF_LDLM_CONVERT =
1068         DEFINE_REQ_FMT0("LDLM_CONVERT",
1069                         ldlm_enqueue_client, ldlm_enqueue_server);
1070 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1071
1072 const struct req_format RQF_LDLM_CANCEL =
1073         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1074 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1075
1076 const struct req_format RQF_LDLM_CALLBACK =
1077         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1078 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1079
1080 const struct req_format RQF_LDLM_CP_CALLBACK =
1081         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1082 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1083
1084 const struct req_format RQF_LDLM_BL_CALLBACK =
1085         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1086 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1087
1088 const struct req_format RQF_LDLM_GL_CALLBACK =
1089         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1090                         ldlm_gl_callback_server);
1091 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1092
1093 const struct req_format RQF_LDLM_INTENT =
1094         DEFINE_REQ_FMT0("LDLM_INTENT",
1095                         ldlm_intent_client, ldlm_intent_server);
1096 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1097
1098 const struct req_format RQF_LDLM_INTENT_GETATTR =
1099         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1100                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1101 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1102
1103 const struct req_format RQF_LDLM_INTENT_OPEN =
1104         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1105                         ldlm_intent_open_client, ldlm_intent_open_server);
1106 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1107
1108 const struct req_format RQF_LDLM_INTENT_CREATE =
1109         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1110                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1111 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1112
1113 const struct req_format RQF_LDLM_INTENT_UNLINK =
1114         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1115                         ldlm_intent_unlink_client, ldlm_intent_server);
1116 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1117
1118 const struct req_format RQF_MDS_CLOSE =
1119         DEFINE_REQ_FMT0("MDS_CLOSE",
1120                         mdt_close_client, mds_last_unlink_server);
1121 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1122
1123 const struct req_format RQF_MDS_PIN =
1124         DEFINE_REQ_FMT0("MDS_PIN",
1125                         mdt_body_capa, mdt_body_only);
1126 EXPORT_SYMBOL(RQF_MDS_PIN);
1127
1128 const struct req_format RQF_MDS_UNPIN =
1129         DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1130 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1131
1132 const struct req_format RQF_MDS_DONE_WRITING =
1133         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1134                         mdt_close_client, mdt_body_only);
1135 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1136
1137 const struct req_format RQF_MDS_READPAGE =
1138         DEFINE_REQ_FMT0("MDS_READPAGE",
1139                         mdt_body_capa, mdt_body_only);
1140 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1141
1142 /* This is for split */
1143 const struct req_format RQF_MDS_WRITEPAGE =
1144         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1145                         mdt_body_capa, mdt_body_only);
1146 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1147
1148 const struct req_format RQF_MDS_IS_SUBDIR =
1149         DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1150                         mdt_body_only, mdt_body_only);
1151 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1152
1153 const struct req_format RQF_LLOG_CATINFO =
1154         DEFINE_REQ_FMT0("LLOG_CATINFO",
1155                         llog_catinfo_client, llog_catinfo_server);
1156 EXPORT_SYMBOL(RQF_LLOG_CATINFO);
1157
1158 const struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1159         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1160                         llog_origin_handle_create_client, llogd_body_only);
1161 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1162
1163 const struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1164         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1165                         llogd_body_only, llogd_body_only);
1166 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1167
1168 const struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1169         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1170                         llogd_body_only, llog_origin_handle_next_block_server);
1171 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1172
1173 const struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1174         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1175                         llogd_body_only, llog_origin_handle_next_block_server);
1176 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1177
1178 const struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1179         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1180                         llogd_body_only, llog_log_hdr_only);
1181 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1182
1183 const struct req_format RQF_LLOG_ORIGIN_CONNECT =
1184         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1185 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1186
1187 const struct req_format RQF_OST_CONNECT =
1188         DEFINE_REQ_FMT0("OST_CONNECT",
1189                         obd_connect_client, obd_connect_server);
1190 EXPORT_SYMBOL(RQF_OST_CONNECT);
1191
1192 const struct req_format RQF_OST_DISCONNECT =
1193         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1194 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1195
1196 const struct req_format RQF_OST_GETATTR =
1197         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1198 EXPORT_SYMBOL(RQF_OST_GETATTR);
1199
1200 const struct req_format RQF_OST_SETATTR =
1201         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1202 EXPORT_SYMBOL(RQF_OST_SETATTR);
1203
1204 const struct req_format RQF_OST_CREATE =
1205         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1206 EXPORT_SYMBOL(RQF_OST_CREATE);
1207
1208 const struct req_format RQF_OST_PUNCH =
1209         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1210 EXPORT_SYMBOL(RQF_OST_PUNCH);
1211
1212 const struct req_format RQF_OST_SYNC =
1213         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1214 EXPORT_SYMBOL(RQF_OST_SYNC);
1215
1216 const struct req_format RQF_OST_DESTROY =
1217         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1218 EXPORT_SYMBOL(RQF_OST_DESTROY);
1219
1220 const struct req_format RQF_OST_BRW =
1221         DEFINE_REQ_FMT0("OST_BRW", ost_brw_client, ost_brw_server);
1222 EXPORT_SYMBOL(RQF_OST_BRW);
1223
1224 const struct req_format RQF_OST_STATFS =
1225         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1226 EXPORT_SYMBOL(RQF_OST_STATFS);
1227
1228 const struct req_format RQF_OST_SET_GRANT_INFO =
1229         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", obd_set_info_client,
1230                          ost_body_only);
1231 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1232
1233 const struct req_format RQF_OST_GET_INFO_GENERIC =
1234         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1235                                         ost_get_info_generic_server);
1236 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1237
1238 const struct req_format RQF_OST_GET_INFO_LAST_ID =
1239         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1240                                                 ost_get_last_id_server);
1241 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1242
1243 const struct req_format RQF_OST_GET_INFO_FIEMAP =
1244         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1245                                                ost_get_fiemap_server);
1246 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1247
1248
1249 #if !defined(__REQ_LAYOUT_USER__)
1250
1251 int req_layout_init(void)
1252 {
1253         int i;
1254         int j;
1255         int k;
1256
1257         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1258                 struct req_format *rf;
1259
1260                 rf = (struct req_format *)req_formats[i];
1261                 rf->rf_idx = i;
1262                 for (j = 0; j < RCL_NR; ++j) {
1263                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1264                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1265                                 struct req_msg_field *field;
1266
1267                                 field = (typeof(field))rf->rf_fields[j].d[k];
1268                                 LASSERT(field->rmf_offset[i][j] == 0);
1269                                 /*
1270                                  * k + 1 to detect unused format/field
1271                                  * combinations.
1272                                  */
1273                                 field->rmf_offset[i][j] = k + 1;
1274                         }
1275                 }
1276         }
1277         return 0;
1278 }
1279 EXPORT_SYMBOL(req_layout_init);
1280
1281 void req_layout_fini(void)
1282 {
1283 }
1284 EXPORT_SYMBOL(req_layout_fini);
1285
1286 void req_capsule_init_area(struct req_capsule *pill)
1287 {
1288         int i;
1289
1290         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1291                 pill->rc_area[RCL_CLIENT][i] = -1;
1292                 pill->rc_area[RCL_SERVER][i] = -1;
1293         }
1294 }
1295 EXPORT_SYMBOL(req_capsule_init_area);
1296
1297 /*
1298  * Initialize capsule.
1299  *
1300  * @area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1301  * variable-sized fields.
1302  */
1303 void req_capsule_init(struct req_capsule *pill,
1304                       struct ptlrpc_request *req,
1305                       enum req_location location)
1306 {
1307         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1308
1309         memset(pill, 0, sizeof *pill);
1310         pill->rc_req = req;
1311         pill->rc_loc = location;
1312         req_capsule_init_area(pill);
1313 }
1314 EXPORT_SYMBOL(req_capsule_init);
1315
1316 void req_capsule_fini(struct req_capsule *pill)
1317 {
1318 }
1319 EXPORT_SYMBOL(req_capsule_fini);
1320
1321 static int __req_format_is_sane(const struct req_format *fmt)
1322 {
1323         return
1324                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1325                 req_formats[fmt->rf_idx] == fmt;
1326 }
1327
1328 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1329                                     enum req_location loc)
1330 {
1331         struct ptlrpc_request *req;
1332
1333         req = pill->rc_req;
1334         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1335 }
1336
1337 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1338 {
1339         LASSERT(pill->rc_fmt == NULL);
1340         LASSERT(__req_format_is_sane(fmt));
1341
1342         pill->rc_fmt = fmt;
1343 }
1344 EXPORT_SYMBOL(req_capsule_set);
1345
1346 int req_capsule_filled_sizes(struct req_capsule *pill,
1347                            enum req_location loc)
1348 {
1349         const struct req_format *fmt = pill->rc_fmt;
1350         int                      i;
1351
1352         LASSERT(fmt != NULL);
1353
1354         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1355                 if (pill->rc_area[loc][i] == -1) {
1356                         pill->rc_area[loc][i] =
1357                                             fmt->rf_fields[loc].d[i]->rmf_size;
1358                         if (pill->rc_area[loc][i] == -1) {
1359                                 /* skip the following fields */
1360                                 LASSERT(loc != RCL_SERVER);
1361                                 break;
1362                         }
1363                 }
1364         }
1365         return i;
1366 }
1367 EXPORT_SYMBOL(req_capsule_filled_sizes);
1368
1369 int req_capsule_server_pack(struct req_capsule *pill)
1370 {
1371         const struct req_format *fmt;
1372         int                      count;
1373         int                      rc;
1374
1375         LASSERT(pill->rc_loc == RCL_SERVER);
1376         fmt = pill->rc_fmt;
1377         LASSERT(fmt != NULL);
1378
1379         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1380         rc = lustre_pack_reply(pill->rc_req, count,
1381                                pill->rc_area[RCL_SERVER], NULL);
1382         if (rc != 0) {
1383                 DEBUG_REQ(D_ERROR, pill->rc_req,
1384                           "Cannot pack %d fields in format `%s': ",
1385                           count, fmt->rf_name);
1386         }
1387         return rc;
1388 }
1389 EXPORT_SYMBOL(req_capsule_server_pack);
1390
1391 static int __req_capsule_offset(const struct req_capsule *pill,
1392                                 const struct req_msg_field *field,
1393                                 enum req_location loc)
1394 {
1395         int offset;
1396
1397         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1398         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1399                             pill->rc_fmt->rf_name,
1400                             field->rmf_name, offset, loc);
1401         offset --;
1402         LASSERT(0 <= offset && offset < (sizeof(pill->rc_swabbed) << 3));
1403         return offset;
1404 }
1405
1406 static void *__req_capsule_get(struct req_capsule *pill,
1407                                const struct req_msg_field *field,
1408                                enum req_location loc,
1409                                void (*swabber)( void *))
1410 {
1411         const struct req_format *fmt;
1412         struct lustre_msg       *msg;
1413         void                    *value;
1414         int                      len;
1415         int                      offset;
1416
1417         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1418
1419         static const char *rcl_names[RCL_NR] = {
1420                 [RCL_CLIENT] = "client",
1421                 [RCL_SERVER] = "server"
1422         };
1423
1424         LASSERT(pill != NULL);
1425         LASSERT(pill != LP_POISON);
1426         fmt = pill->rc_fmt;
1427         LASSERT(fmt != NULL);
1428         LASSERT(fmt != LP_POISON);
1429         LASSERT(__req_format_is_sane(fmt));
1430
1431         offset = __req_capsule_offset(pill, field, loc);
1432
1433         msg = __req_msg(pill, loc);
1434         LASSERT(msg != NULL);
1435
1436         getter = (field->rmf_flags & RMF_F_STRING) ?
1437                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1438
1439         if (pill->rc_area[loc][offset] != -1)
1440                 len = pill->rc_area[loc][offset];
1441         else
1442                 len = max(field->rmf_size, 0);
1443         value = getter(msg, offset, len);
1444
1445         swabber = swabber ?: field->rmf_swabber;
1446         if (!(pill->rc_swabbed & (1 << offset)) && loc != pill->rc_loc &&
1447             swabber != NULL && value != NULL &&
1448             lustre_msg_swabbed(msg)) {
1449                 swabber(value);
1450                 pill->rc_swabbed |= (1 << offset);
1451         }
1452         if (value == NULL) {
1453                 DEBUG_REQ(D_ERROR, pill->rc_req,
1454                           "Wrong buffer for field `%s' (%d of %d) "
1455                           "in format `%s': %d vs. %d (%s)\n",
1456                           field->rmf_name, offset, lustre_msg_bufcount(msg), fmt->rf_name,
1457                           lustre_msg_buflen(msg, offset), len,
1458                           rcl_names[loc]);
1459         }
1460
1461         return value;
1462 }
1463
1464 void *req_capsule_client_get(struct req_capsule *pill,
1465                              const struct req_msg_field *field)
1466 {
1467         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1468 }
1469 EXPORT_SYMBOL(req_capsule_client_get);
1470
1471 void *req_capsule_client_swab_get(struct req_capsule *pill,
1472                                   const struct req_msg_field *field,
1473                                   void (*swabber)(void* ))
1474 {
1475         return __req_capsule_get(pill, field, RCL_CLIENT, swabber);
1476 }
1477 EXPORT_SYMBOL(req_capsule_client_swab_get);
1478
1479 void *req_capsule_client_sized_get(struct req_capsule *pill,
1480                                    const struct req_msg_field *field,
1481                                    int len)
1482 {
1483         req_capsule_set_size(pill, field, RCL_CLIENT, len);
1484         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1485 }
1486 EXPORT_SYMBOL(req_capsule_client_sized_get);
1487
1488 void *req_capsule_server_get(struct req_capsule *pill,
1489                              const struct req_msg_field *field)
1490 {
1491         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1492 }
1493 EXPORT_SYMBOL(req_capsule_server_get);
1494
1495 void *req_capsule_server_swab_get(struct req_capsule *pill,
1496                                   const struct req_msg_field *field,
1497                                   void *swabber)
1498 {
1499         return __req_capsule_get(pill, field, RCL_SERVER, swabber);
1500 }
1501 EXPORT_SYMBOL(req_capsule_server_swab_get);
1502
1503
1504 void *req_capsule_server_sized_get(struct req_capsule *pill,
1505                                    const struct req_msg_field *field,
1506                                    int len)
1507 {
1508         req_capsule_set_size(pill, field, RCL_SERVER, len);
1509         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1510 }
1511 EXPORT_SYMBOL(req_capsule_server_sized_get);
1512
1513 const void *req_capsule_other_get(struct req_capsule *pill,
1514                                   const struct req_msg_field *field)
1515 {
1516         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL);
1517 }
1518 EXPORT_SYMBOL(req_capsule_other_get);
1519
1520 void req_capsule_set_size(struct req_capsule *pill,
1521                           const struct req_msg_field *field,
1522                           enum req_location loc, int size)
1523 {
1524         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1525
1526         if ((size != field->rmf_size) &&
1527             (field->rmf_size != -1) &&
1528             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
1529             (size > 0)) {
1530                 CERROR("%s: field size mismatch %d != %d (%d)\n",
1531                        field->rmf_name, size, field->rmf_size, loc);
1532                 LBUG();
1533         }
1534
1535         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
1536 }
1537 EXPORT_SYMBOL(req_capsule_set_size);
1538
1539 /* NB: this function doesn't correspond with req_capsule_set_size(), which
1540  * actually sets the size in pill.rc_area[loc][offset], but this function
1541  * returns the message buflen[offset], maybe we should use another name.
1542  */
1543 int req_capsule_get_size(const struct req_capsule *pill,
1544                          const struct req_msg_field *field,
1545                          enum req_location loc)
1546 {
1547         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1548
1549         return lustre_msg_buflen(__req_msg(pill, loc),
1550                                  __req_capsule_offset(pill, field, loc));
1551 }
1552 EXPORT_SYMBOL(req_capsule_get_size);
1553
1554 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
1555 {
1556         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
1557                                pill->rc_fmt->rf_fields[loc].nr,
1558                                pill->rc_area[loc]);
1559 }
1560
1561 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
1562                          enum req_location loc)
1563 {
1564         int size, i = 0;
1565
1566         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
1567         if (size < 0)
1568                 return size;
1569
1570         for (; i < fmt->rf_fields[loc].nr; ++i)
1571                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
1572                         size += size_round(fmt->rf_fields[loc].d[i]->rmf_size);
1573         return size;
1574 }
1575
1576 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1577
1578 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
1579 {
1580         int i;
1581         int j;
1582
1583         const struct req_format *old;
1584
1585         LASSERT(pill->rc_fmt != NULL);
1586         LASSERT(__req_format_is_sane(fmt));
1587
1588         old = pill->rc_fmt;
1589         /*
1590          * Sanity checking...
1591          */
1592         for (i = 0; i < RCL_NR; ++i) {
1593                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
1594                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
1595                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
1596                 }
1597                 /*
1598                  * Last field in old format can be shorter than in new.
1599                  */
1600                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
1601                         FMT_FIELD(old, i, j)->rmf_size);
1602         }
1603         /* last field should be returned to the unswabbed state */
1604         pill->rc_swabbed &= ~(__u32)(1 << j);
1605         pill->rc_fmt = fmt;
1606 }
1607 EXPORT_SYMBOL(req_capsule_extend);
1608
1609 int req_capsule_has_field(const struct req_capsule *pill,
1610                           const struct req_msg_field *field,
1611                           enum req_location loc)
1612 {
1613         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1614
1615         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1616 }
1617 EXPORT_SYMBOL(req_capsule_has_field);
1618
1619 int req_capsule_field_present(const struct req_capsule *pill,
1620                               const struct req_msg_field *field,
1621                               enum req_location loc)
1622 {
1623         int offset;
1624
1625         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1626         LASSERT(req_capsule_has_field(pill, field, loc));
1627
1628         offset = __req_capsule_offset(pill, field, loc);
1629         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
1630 }
1631 EXPORT_SYMBOL(req_capsule_field_present);
1632
1633 void req_capsule_shrink(struct req_capsule *pill,
1634                         const struct req_msg_field *field,
1635                         unsigned int newlen,
1636                         enum req_location loc)
1637 {
1638         const struct req_format *fmt;
1639         struct lustre_msg       *msg;
1640         int                      len;
1641         int                      offset;
1642
1643         fmt = pill->rc_fmt;
1644         LASSERT(fmt != NULL);
1645         LASSERT(__req_format_is_sane(fmt));
1646         LASSERT(req_capsule_has_field(pill, field, loc));
1647         LASSERT(req_capsule_field_present(pill, field, loc));
1648
1649         offset = __req_capsule_offset(pill, field, loc);
1650
1651         msg = __req_msg(pill, loc);
1652         len = lustre_msg_buflen(msg, offset);
1653         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
1654                                 fmt->rf_name, field->rmf_name, len, newlen);
1655
1656         if (loc == RCL_CLIENT)
1657                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
1658                                                             1);
1659         else
1660                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
1661                                                             1);
1662 }
1663 EXPORT_SYMBOL(req_capsule_shrink);
1664
1665 /* __REQ_LAYOUT_USER__ */
1666 #endif