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