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 };
 390
 391 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 392         &RMF_PTLRPC_BODY,
 393         &RMF_DLM_REQ,
 394         &RMF_LDLM_INTENT,
 395         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 396         &RMF_CAPA1,
 397         &RMF_NAME
 398 };
 399
 400 static const struct req_msg_field *mds_getxattr_client[] = {
 401         &RMF_PTLRPC_BODY,
 402         &RMF_MDT_BODY,
 403         &RMF_CAPA1,
 404         &RMF_NAME,
 405         &RMF_EADATA
 406 };
 407
 408 static const struct req_msg_field *mds_getxattr_server[] = {
 409         &RMF_PTLRPC_BODY,
 410         &RMF_MDT_BODY,
 411         &RMF_EADATA
 412 };
 413
 414 static const struct req_msg_field *mds_getattr_server[] = {
 415         &RMF_PTLRPC_BODY,
 416         &RMF_MDT_BODY,
 417         &RMF_MDT_MD,
 418         &RMF_ACL,
 419         &RMF_CAPA1,
 420         &RMF_CAPA2
 421 };
 422
 423 static const struct req_msg_field *mds_setattr_server[] = {
 424         &RMF_PTLRPC_BODY,
 425         &RMF_MDT_BODY,
 426         &RMF_MDT_MD,
 427         &RMF_ACL,
 428         &RMF_CAPA1,
 429         &RMF_CAPA2
 430 };
 431
 432 static const struct req_msg_field *llog_catinfo_client[] = {
 433         &RMF_PTLRPC_BODY,
 434         &RMF_NAME,
 435         &RMF_STRING
 436 };
 437
 438 static const struct req_msg_field *llog_catinfo_server[] = {
 439         &RMF_PTLRPC_BODY,
 440         &RMF_STRING
 441 };
 442
 443 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 444         &RMF_PTLRPC_BODY,
 445         &RMF_LLOGD_BODY,
 446         &RMF_NAME
 447 };
 448
 449 static const struct req_msg_field *llogd_body_only[] = {
 450         &RMF_PTLRPC_BODY,
 451         &RMF_LLOGD_BODY
 452 };
 453
 454 static const struct req_msg_field *llog_log_hdr_only[] = {
 455         &RMF_PTLRPC_BODY,
 456         &RMF_LLOG_LOG_HDR
 457 };
 458
 459 static const struct req_msg_field *llogd_conn_body_only[] = {
 460         &RMF_PTLRPC_BODY,
 461         &RMF_LLOGD_CONN_BODY
 462 };
 463
 464 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 465         &RMF_PTLRPC_BODY,
 466         &RMF_LLOGD_BODY,
 467         &RMF_EADATA
 468 };
 469
 470 static const struct req_msg_field *ost_body_only[] = {
 471         &RMF_PTLRPC_BODY,
 472         &RMF_OST_BODY
 473 };
 474
 475 static const struct req_msg_field *ost_body_capa[] = {
 476         &RMF_PTLRPC_BODY,
 477         &RMF_OST_BODY,
 478         &RMF_CAPA1
 479 };
 480
 481 static const struct req_msg_field *ost_destroy_client[] = {
 482         &RMF_PTLRPC_BODY,
 483         &RMF_OST_BODY,
 484         &RMF_DLM_REQ,
 485         &RMF_CAPA1
 486 };
 487
 488
 489 static const struct req_msg_field *ost_brw_client[] = {
 490         &RMF_PTLRPC_BODY,
 491         &RMF_OST_BODY,
 492         &RMF_OBD_IOOBJ,
 493         &RMF_NIOBUF_REMOTE,
 494         &RMF_CAPA1
 495 };
 496
 497 static const struct req_msg_field *ost_brw_server[] = {
 498         &RMF_PTLRPC_BODY,
 499         &RMF_OST_BODY,
 500         &RMF_NIOBUF_REMOTE
 501 };
 502
 503 static const struct req_msg_field *ost_get_info_generic_server[] = {
 504         &RMF_PTLRPC_BODY,
 505         &RMF_GENERIC_DATA,
 506 };
 507
 508 static const struct req_msg_field *ost_get_info_generic_client[] = {
 509         &RMF_PTLRPC_BODY,
 510         &RMF_SETINFO_KEY
 511 };
 512
 513 static const struct req_msg_field *ost_get_last_id_server[] = {
 514         &RMF_PTLRPC_BODY,
 515         &RMF_OBD_ID
 516 };
 517
 518 static const struct req_msg_field *ost_get_fiemap_client[] = {
 519         &RMF_PTLRPC_BODY,
 520         &RMF_FIEMAP_KEY,
 521         &RMF_FIEMAP_VAL
 522 };
 523
 524 static const struct req_msg_field *ost_get_fiemap_server[] = {
 525         &RMF_PTLRPC_BODY,
 526         &RMF_FIEMAP_VAL
 527 };
 528
 529 static const struct req_format *req_formats[] = {
 530         &RQF_OBD_PING,
 531         &RQF_OBD_SET_INFO,
 532         &RQF_SEC_CTX,
 533         &RQF_MGS_TARGET_REG,
 534         &RQF_MGS_SET_INFO,
 535         &RQF_SEQ_QUERY,
 536         &RQF_FLD_QUERY,
 537         &RQF_MDS_CONNECT,
 538         &RQF_MDS_DISCONNECT,
 539         &RQF_MDS_GET_INFO,
 540         &RQF_MDS_GETSTATUS,
 541         &RQF_MDS_STATFS,
 542         &RQF_MDS_GETATTR,
 543         &RQF_MDS_GETATTR_NAME,
 544         &RQF_MDS_GETXATTR,
 545         &RQF_MDS_SYNC,
 546         &RQF_MDS_CLOSE,
 547         &RQF_MDS_PIN,
 548         &RQF_MDS_UNPIN,
 549         &RQF_MDS_READPAGE,
 550         &RQF_MDS_WRITEPAGE,
 551         &RQF_MDS_IS_SUBDIR,
 552         &RQF_MDS_DONE_WRITING,
 553         &RQF_MDS_REINT,
 554         &RQF_MDS_REINT_CREATE,
 555         &RQF_MDS_REINT_CREATE_RMT_ACL,
 556         &RQF_MDS_REINT_CREATE_SLAVE,
 557         &RQF_MDS_REINT_CREATE_SYM,
 558         &RQF_MDS_REINT_OPEN,
 559         &RQF_MDS_REINT_UNLINK,
 560         &RQF_MDS_REINT_LINK,
 561         &RQF_MDS_REINT_RENAME,
 562         &RQF_MDS_REINT_SETATTR,
 563         &RQF_MDS_REINT_SETXATTR,
 564         &RQF_MDS_QUOTACHECK,
 565         &RQF_MDS_QUOTACTL,
 566         &RQF_MDS_QUOTA_DQACQ,
 567         &RQF_QC_CALLBACK,
 568         &RQF_OST_CONNECT,
 569         &RQF_OST_DISCONNECT,
 570         &RQF_OST_QUOTACHECK,
 571         &RQF_OST_QUOTACTL,
 572         &RQF_OST_QUOTA_ADJUST_QUNIT,
 573         &RQF_OST_GETATTR,
 574         &RQF_OST_SETATTR,
 575         &RQF_OST_CREATE,
 576         &RQF_OST_PUNCH,
 577         &RQF_OST_SYNC,
 578         &RQF_OST_DESTROY,
 579         &RQF_OST_BRW,
 580         &RQF_OST_STATFS,
 581         &RQF_OST_SET_GRANT_INFO,
 582         &RQF_OST_GET_INFO_GENERIC,
 583         &RQF_OST_GET_INFO_LAST_ID,
 584         &RQF_OST_GET_INFO_FIEMAP,
 585         &RQF_LDLM_ENQUEUE,
 586         &RQF_LDLM_ENQUEUE_LVB,
 587         &RQF_LDLM_CONVERT,
 588         &RQF_LDLM_CANCEL,
 589         &RQF_LDLM_CALLBACK,
 590         &RQF_LDLM_CP_CALLBACK,
 591         &RQF_LDLM_BL_CALLBACK,
 592         &RQF_LDLM_GL_CALLBACK,
 593         &RQF_LDLM_INTENT,
 594         &RQF_LDLM_INTENT_GETATTR,
 595         &RQF_LDLM_INTENT_OPEN,
 596         &RQF_LDLM_INTENT_CREATE,
 597         &RQF_LDLM_INTENT_UNLINK,
 598         &RQF_LOG_CANCEL,
 599         &RQF_LLOG_CATINFO,
 600         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 601         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 602         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 603         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 604         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 605         &RQF_LLOG_ORIGIN_CONNECT
 606 };
 607
 608 struct req_msg_field {
 609         __u32       rmf_flags;
 610         const char *rmf_name;
 611         /**
 612          * Field length. (-1) means "variable length".
 613          */
 614         int         rmf_size;
 615         void      (*rmf_swabber)(void *);
 616         int         rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 617 };
 618
 619 enum rmf_flags {
 620         RMF_F_STRING = 1 << 0,
 621         RMF_F_NO_SIZE_CHECK = 1 << 1
 622 };
 623
 624 struct req_capsule;
 625
 626 /*
 627  * Request fields.
 628  */
 629 #define DEFINE_MSGF(name, flags, size, swabber) {       \
 630         .rmf_name    = (name),                          \
 631         .rmf_flags   = (flags),                         \
 632         .rmf_size    = (size),                          \
 633         .rmf_swabber = (void (*)(void*))(swabber)       \
 634 }
 635
 636 const struct req_msg_field RMF_GENERIC_DATA =
 637         DEFINE_MSGF("generic_data", 0,
 638                     -1, NULL);
 639 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 640
 641 const struct req_msg_field RMF_MGS_TARGET_INFO =
 642         DEFINE_MSGF("mgs_target_info", 0,
 643                     sizeof(struct mgs_target_info),
 644                     lustre_swab_mgs_target_info);
 645 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 646
 647 const struct req_msg_field RMF_MGS_SEND_PARAM =
 648         DEFINE_MSGF("mgs_send_param", 0,
 649                     sizeof(struct mgs_send_param),
 650                     NULL);
 651 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 652
 653 const struct req_msg_field RMF_SETINFO_VAL =
 654         DEFINE_MSGF("setinfo_val", 0, -1, NULL);
 655 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 656
 657 const struct req_msg_field RMF_GETINFO_KEY =
 658         DEFINE_MSGF("getinfo_key", 0, -1, NULL);
 659 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 660
 661 const struct req_msg_field RMF_GETINFO_VALLEN =
 662         DEFINE_MSGF("getinfo_vallen", 0,
 663                     sizeof(__u32), lustre_swab_generic_32s);
 664 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 665
 666 const struct req_msg_field RMF_GETINFO_VAL =
 667         DEFINE_MSGF("getinfo_val", 0, -1, NULL);
 668 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 669
 670 const struct req_msg_field RMF_SEQ_OPC =
 671         DEFINE_MSGF("seq_query_opc", 0,
 672                     sizeof(__u32), lustre_swab_generic_32s);
 673 EXPORT_SYMBOL(RMF_SEQ_OPC);
 674
 675 const struct req_msg_field RMF_SEQ_RANGE =
 676         DEFINE_MSGF("seq_query_range", 0,
 677                     sizeof(struct lu_seq_range), lustre_swab_lu_seq_range);
 678 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 679
 680 const struct req_msg_field RMF_FLD_OPC =
 681         DEFINE_MSGF("fld_query_opc", 0,
 682                     sizeof(__u32), lustre_swab_generic_32s);
 683 EXPORT_SYMBOL(RMF_FLD_OPC);
 684
 685 const struct req_msg_field RMF_FLD_MDFLD =
 686         DEFINE_MSGF("fld_query_mdfld", 0,
 687                     sizeof(struct lu_seq_range), lustre_swab_lu_seq_range);
 688 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 689
 690 const struct req_msg_field RMF_MDT_BODY =
 691         DEFINE_MSGF("mdt_body", 0,
 692                     sizeof(struct mdt_body), lustre_swab_mdt_body);
 693 EXPORT_SYMBOL(RMF_MDT_BODY);
 694
 695 const struct req_msg_field RMF_OBD_QUOTACTL =
 696         DEFINE_MSGF("obd_quotactl", 0,
 697                     sizeof(struct obd_quotactl), lustre_swab_obd_quotactl);
 698 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 699
 700 const struct req_msg_field RMF_QUOTA_ADJUST_QUNIT =
 701         DEFINE_MSGF("quota_adjust_qunit", 0,
 702                     sizeof(struct quota_adjust_qunit),
 703                     lustre_swab_quota_adjust_qunit);
 704 EXPORT_SYMBOL(RMF_QUOTA_ADJUST_QUNIT);
 705
 706 const struct req_msg_field RMF_QUNIT_DATA =
 707         DEFINE_MSGF("qunit_data", 0,
 708                     sizeof(struct qunit_data), NULL);
 709 EXPORT_SYMBOL(RMF_QUNIT_DATA);
 710
 711 const struct req_msg_field RMF_MDT_EPOCH =
 712         DEFINE_MSGF("mdt_epoch", 0,
 713                     sizeof(struct mdt_epoch), lustre_swab_mdt_epoch);
 714 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 715
 716 const struct req_msg_field RMF_PTLRPC_BODY =
 717         DEFINE_MSGF("ptlrpc_body", 0,
 718                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body);
 719 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 720
 721 const struct req_msg_field RMF_OBD_STATFS =
 722         DEFINE_MSGF("obd_statfs", 0,
 723                     sizeof(struct obd_statfs), lustre_swab_obd_statfs);
 724 EXPORT_SYMBOL(RMF_OBD_STATFS);
 725
 726 const struct req_msg_field RMF_SETINFO_KEY =
 727         DEFINE_MSGF("setinfo_key", 0, -1, NULL);
 728 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 729
 730 const struct req_msg_field RMF_NAME =
 731         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL);
 732 EXPORT_SYMBOL(RMF_NAME);
 733
 734 const struct req_msg_field RMF_SYMTGT =
 735         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL);
 736 EXPORT_SYMBOL(RMF_SYMTGT);
 737
 738 const struct req_msg_field RMF_TGTUUID =
 739         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 740 EXPORT_SYMBOL(RMF_TGTUUID);
 741
 742 const struct req_msg_field RMF_CLUUID =
 743         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 744 EXPORT_SYMBOL(RMF_CLUUID);
 745
 746 const struct req_msg_field RMF_STRING =
 747         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL);
 748 EXPORT_SYMBOL(RMF_STRING);
 749
 750 const struct req_msg_field RMF_LLOGD_BODY =
 751         DEFINE_MSGF("llogd_body", 0,
 752                     sizeof(struct llogd_body), lustre_swab_llogd_body);
 753 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 754
 755 const struct req_msg_field RMF_LLOG_LOG_HDR =
 756         DEFINE_MSGF("llog_log_hdr", 0,
 757                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr);
 758 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 759
 760 const struct req_msg_field RMF_LLOGD_CONN_BODY =
 761         DEFINE_MSGF("llogd_conn_body", 0,
 762                     sizeof(struct llogd_conn_body),
 763                     lustre_swab_llogd_conn_body);
 764 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 765
 766 /*
 767  * connection handle received in MDS_CONNECT request.
 768  *
 769  * XXX no swabbing?
 770  */
 771 const struct req_msg_field RMF_CONN =
 772         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL);
 773 EXPORT_SYMBOL(RMF_CONN);
 774
 775 const struct req_msg_field RMF_CONNECT_DATA =
 776         DEFINE_MSGF("cdata",
 777                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
 778                     sizeof(struct obd_connect_data), lustre_swab_connect);
 779 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 780
 781 const struct req_msg_field RMF_DLM_REQ =
 782         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
 783                     sizeof(struct ldlm_request), lustre_swab_ldlm_request);
 784 EXPORT_SYMBOL(RMF_DLM_REQ);
 785
 786 const struct req_msg_field RMF_DLM_REP =
 787         DEFINE_MSGF("dlm_rep", 0,
 788                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply);
 789 EXPORT_SYMBOL(RMF_DLM_REP);
 790
 791 const struct req_msg_field RMF_LDLM_INTENT =
 792         DEFINE_MSGF("ldlm_intent", 0,
 793                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent);
 794 EXPORT_SYMBOL(RMF_LDLM_INTENT);
 795
 796 const struct req_msg_field RMF_DLM_LVB =
 797         DEFINE_MSGF("dlm_lvb", 0, sizeof(struct ost_lvb), NULL);
 798 EXPORT_SYMBOL(RMF_DLM_LVB);
 799
 800 const struct req_msg_field RMF_MDT_MD =
 801         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL);
 802 EXPORT_SYMBOL(RMF_MDT_MD);
 803
 804 const struct req_msg_field RMF_REC_REINT =
 805         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
 806                     lustre_swab_mdt_rec_reint);
 807 EXPORT_SYMBOL(RMF_REC_REINT);
 808
 809 /* FIXME: this length should be defined as a macro */
 810 const struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1, NULL);
 811 EXPORT_SYMBOL(RMF_EADATA);
 812
 813 const struct req_msg_field RMF_ACL =
 814         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
 815                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL);
 816 EXPORT_SYMBOL(RMF_ACL);
 817
 818 const struct req_msg_field RMF_LOGCOOKIES =
 819         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
 820                     sizeof(struct llog_cookie), NULL);
 821 EXPORT_SYMBOL(RMF_LOGCOOKIES);
 822
 823 const struct req_msg_field RMF_CAPA1 =
 824         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 825                     lustre_swab_lustre_capa);
 826 EXPORT_SYMBOL(RMF_CAPA1);
 827
 828 const struct req_msg_field RMF_CAPA2 =
 829         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 830                     lustre_swab_lustre_capa);
 831 EXPORT_SYMBOL(RMF_CAPA2);
 832
 833 /*
 834  * OST request field.
 835  */
 836 const struct req_msg_field RMF_OST_BODY =
 837         DEFINE_MSGF("ost_body", 0,
 838                     sizeof(struct ost_body), lustre_swab_ost_body);
 839 EXPORT_SYMBOL(RMF_OST_BODY);
 840
 841 const struct req_msg_field RMF_OBD_IOOBJ =
 842         DEFINE_MSGF("obd_ioobj", 0,
 843                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj);
 844 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
 845
 846 const struct req_msg_field RMF_NIOBUF_REMOTE =
 847         DEFINE_MSGF("niobuf_remote", 0, -1, lustre_swab_niobuf_remote);
 848 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
 849
 850 const struct req_msg_field RMF_OBD_ID =
 851         DEFINE_MSGF("obd_id", 0,
 852                     sizeof(obd_id), lustre_swab_ost_last_id);
 853 EXPORT_SYMBOL(RMF_OBD_ID);
 854
 855 const struct req_msg_field RMF_FIEMAP_KEY =
 856         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
 857                     lustre_swab_fiemap);
 858 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
 859
 860 const struct req_msg_field RMF_FIEMAP_VAL =
 861         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap);
 862 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
 863
 864 /*
 865  * Request formats.
 866  */
 867
 868 struct req_format {
 869         const char *rf_name;
 870         int         rf_idx;
 871         struct {
 872                 int                          nr;
 873                 const struct req_msg_field **d;
 874         } rf_fields[RCL_NR];
 875 };
 876
 877 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
 878         .rf_name   = name,                                              \
 879         .rf_fields = {                                                  \
 880                 [RCL_CLIENT] = {                                        \
 881                         .nr = client_nr,                                \
 882                         .d  = client                                    \
 883                 },                                                      \
 884                 [RCL_SERVER] = {                                        \
 885                         .nr = server_nr,                                \
 886                         .d  = server                                    \
 887                 }                                                       \
 888         }                                                               \
 889 }
 890
 891 #define DEFINE_REQ_FMT0(name, client, server)                                  \
 892 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
 893
 894 const struct req_format RQF_OBD_PING =
 895         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
 896 EXPORT_SYMBOL(RQF_OBD_PING);
 897
 898 const struct req_format RQF_OBD_SET_INFO =
 899         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
 900 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
 901
 902 const struct req_format RQF_SEC_CTX =
 903         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
 904 EXPORT_SYMBOL(RQF_SEC_CTX);
 905
 906 const struct req_format RQF_MGS_TARGET_REG =
 907         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
 908                          mgs_target_info_only);
 909 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
 910
 911 const struct req_format RQF_MGS_SET_INFO =
 912         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
 913                          mgs_set_info);
 914 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
 915
 916 const struct req_format RQF_SEQ_QUERY =
 917         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
 918 EXPORT_SYMBOL(RQF_SEQ_QUERY);
 919
 920 const struct req_format RQF_FLD_QUERY =
 921         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
 922 EXPORT_SYMBOL(RQF_FLD_QUERY);
 923
 924 const struct req_format RQF_LOG_CANCEL =
 925         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
 926 EXPORT_SYMBOL(RQF_LOG_CANCEL);
 927
 928 const struct req_format RQF_MDS_QUOTACHECK =
 929         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
 930 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
 931
 932 const struct req_format RQF_OST_QUOTACHECK =
 933         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
 934 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
 935
 936 const struct req_format RQF_MDS_QUOTACTL =
 937         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
 938 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
 939
 940 const struct req_format RQF_OST_QUOTACTL =
 941         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
 942 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
 943
 944 const struct req_format RQF_OST_QUOTA_ADJUST_QUNIT =
 945         DEFINE_REQ_FMT0("OST_QUOTA_ADJUST_QUNIT", quota_adjust_qunit_only,
 946                         quota_adjust_qunit_only);
 947 EXPORT_SYMBOL(RQF_OST_QUOTA_ADJUST_QUNIT);
 948
 949 const struct req_format RQF_QC_CALLBACK =
 950         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
 951 EXPORT_SYMBOL(RQF_QC_CALLBACK);
 952
 953 const struct req_format RQF_MDS_QUOTA_DQACQ =
 954         DEFINE_REQ_FMT0("MDS_QUOTA_DQACQ", qunit_data_only, qunit_data_only);
 955 EXPORT_SYMBOL(RQF_MDS_QUOTA_DQACQ);
 956
 957 const struct req_format RQF_MDS_GETSTATUS =
 958         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
 959 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
 960
 961 const struct req_format RQF_MDS_STATFS =
 962         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
 963 EXPORT_SYMBOL(RQF_MDS_STATFS);
 964
 965 const struct req_format RQF_MDS_SYNC =
 966         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
 967 EXPORT_SYMBOL(RQF_MDS_SYNC);
 968
 969 const struct req_format RQF_MDS_GETATTR =
 970         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
 971 EXPORT_SYMBOL(RQF_MDS_GETATTR);
 972
 973 const struct req_format RQF_MDS_GETXATTR =
 974         DEFINE_REQ_FMT0("MDS_GETXATTR",
 975                         mds_getxattr_client, mds_getxattr_server);
 976 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
 977
 978 const struct req_format RQF_MDS_GETATTR_NAME =
 979         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
 980                         mds_getattr_name_client, mds_getattr_server);
 981 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
 982
 983 const struct req_format RQF_MDS_REINT =
 984         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
 985 EXPORT_SYMBOL(RQF_MDS_REINT);
 986
 987 const struct req_format RQF_MDS_REINT_CREATE =
 988         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
 989                         mds_reint_create_client, mdt_body_capa);
 990 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
 991
 992 const struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
 993         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
 994                         mds_reint_create_rmt_acl_client, mdt_body_capa);
 995 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
 996
 997 const struct req_format RQF_MDS_REINT_CREATE_SLAVE =
 998         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
 999                         mds_reint_create_slave_client, mdt_body_capa);
1000 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1001
1002 const struct req_format RQF_MDS_REINT_CREATE_SYM =
1003         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1004                         mds_reint_create_sym_client, mdt_body_capa);
1005 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1006
1007 const struct req_format RQF_MDS_REINT_OPEN =
1008         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1009                         mds_reint_open_client, mds_reint_open_server);
1010 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1011
1012 const struct req_format RQF_MDS_REINT_UNLINK =
1013         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1014                         mds_last_unlink_server);
1015 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1016
1017 const struct req_format RQF_MDS_REINT_LINK =
1018         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1019                         mds_reint_link_client, mdt_body_only);
1020 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1021
1022 const struct req_format RQF_MDS_REINT_RENAME =
1023         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1024                         mds_last_unlink_server);
1025 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1026
1027 const struct req_format RQF_MDS_REINT_SETATTR =
1028         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1029                         mds_reint_setattr_client, mds_setattr_server);
1030 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1031
1032 const struct req_format RQF_MDS_REINT_SETXATTR =
1033         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1034                         mds_reint_setxattr_client, mdt_body_only);
1035 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1036
1037 const struct req_format RQF_MDS_CONNECT =
1038         DEFINE_REQ_FMT0("MDS_CONNECT",
1039                         obd_connect_client, obd_connect_server);
1040 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1041
1042 const struct req_format RQF_MDS_DISCONNECT =
1043         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1044 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1045
1046 const struct req_format RQF_MDS_GET_INFO =
1047         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1048                         mds_getinfo_server);
1049 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1050
1051 const struct req_format RQF_LDLM_ENQUEUE =
1052         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1053                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1054 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1055
1056 const struct req_format RQF_LDLM_ENQUEUE_LVB =
1057         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1058                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1059 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1060
1061 const struct req_format RQF_LDLM_CONVERT =
1062         DEFINE_REQ_FMT0("LDLM_CONVERT",
1063                         ldlm_enqueue_client, ldlm_enqueue_server);
1064 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1065
1066 const struct req_format RQF_LDLM_CANCEL =
1067         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1068 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1069
1070 const struct req_format RQF_LDLM_CALLBACK =
1071         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1072 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1073
1074 const struct req_format RQF_LDLM_CP_CALLBACK =
1075         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1076 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1077
1078 const struct req_format RQF_LDLM_BL_CALLBACK =
1079         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1080 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1081
1082 const struct req_format RQF_LDLM_GL_CALLBACK =
1083         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1084                         ldlm_gl_callback_server);
1085 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1086
1087 const struct req_format RQF_LDLM_INTENT =
1088         DEFINE_REQ_FMT0("LDLM_INTENT",
1089                         ldlm_intent_client, ldlm_intent_server);
1090 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1091
1092 const struct req_format RQF_LDLM_INTENT_GETATTR =
1093         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1094                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1095 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1096
1097 const struct req_format RQF_LDLM_INTENT_OPEN =
1098         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1099                         ldlm_intent_open_client, ldlm_intent_open_server);
1100 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1101
1102 const struct req_format RQF_LDLM_INTENT_CREATE =
1103         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1104                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1105 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1106
1107 const struct req_format RQF_LDLM_INTENT_UNLINK =
1108         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1109                         ldlm_intent_unlink_client, ldlm_intent_server);
1110 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1111
1112 const struct req_format RQF_MDS_CLOSE =
1113         DEFINE_REQ_FMT0("MDS_CLOSE",
1114                         mdt_close_client, mds_last_unlink_server);
1115 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1116
1117 const struct req_format RQF_MDS_PIN =
1118         DEFINE_REQ_FMT0("MDS_PIN",
1119                         mdt_body_capa, mdt_body_only);
1120 EXPORT_SYMBOL(RQF_MDS_PIN);
1121
1122 const struct req_format RQF_MDS_UNPIN =
1123         DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1124 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1125
1126 const struct req_format RQF_MDS_DONE_WRITING =
1127         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1128                         mdt_close_client, mdt_body_only);
1129 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1130
1131 const struct req_format RQF_MDS_READPAGE =
1132         DEFINE_REQ_FMT0("MDS_READPAGE",
1133                         mdt_body_capa, mdt_body_only);
1134 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1135
1136 /* This is for split */
1137 const struct req_format RQF_MDS_WRITEPAGE =
1138         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1139                         mdt_body_capa, mdt_body_only);
1140 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1141
1142 const struct req_format RQF_MDS_IS_SUBDIR =
1143         DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1144                         mdt_body_only, mdt_body_only);
1145 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1146
1147 const struct req_format RQF_LLOG_CATINFO =
1148         DEFINE_REQ_FMT0("LLOG_CATINFO",
1149                         llog_catinfo_client, llog_catinfo_server);
1150 EXPORT_SYMBOL(RQF_LLOG_CATINFO);
1151
1152 const struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1153         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1154                         llog_origin_handle_create_client, llogd_body_only);
1155 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1156
1157 const struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1158         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1159                         llogd_body_only, llogd_body_only);
1160 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1161
1162 const struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1163         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1164                         llogd_body_only, llog_origin_handle_next_block_server);
1165 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1166
1167 const struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1168         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1169                         llogd_body_only, llog_origin_handle_next_block_server);
1170 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1171
1172 const struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1173         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1174                         llogd_body_only, llog_log_hdr_only);
1175 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1176
1177 const struct req_format RQF_LLOG_ORIGIN_CONNECT =
1178         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1179 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1180
1181 const struct req_format RQF_OST_CONNECT =
1182         DEFINE_REQ_FMT0("OST_CONNECT",
1183                         obd_connect_client, obd_connect_server);
1184 EXPORT_SYMBOL(RQF_OST_CONNECT);
1185
1186 const struct req_format RQF_OST_DISCONNECT =
1187         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1188 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1189
1190 const struct req_format RQF_OST_GETATTR =
1191         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1192 EXPORT_SYMBOL(RQF_OST_GETATTR);
1193
1194 const struct req_format RQF_OST_SETATTR =
1195         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1196 EXPORT_SYMBOL(RQF_OST_SETATTR);
1197
1198 const struct req_format RQF_OST_CREATE =
1199         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1200 EXPORT_SYMBOL(RQF_OST_CREATE);
1201
1202 const struct req_format RQF_OST_PUNCH =
1203         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1204 EXPORT_SYMBOL(RQF_OST_PUNCH);
1205
1206 const struct req_format RQF_OST_SYNC =
1207         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1208 EXPORT_SYMBOL(RQF_OST_SYNC);
1209
1210 const struct req_format RQF_OST_DESTROY =
1211         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1212 EXPORT_SYMBOL(RQF_OST_DESTROY);
1213
1214 const struct req_format RQF_OST_BRW =
1215         DEFINE_REQ_FMT0("OST_BRW", ost_brw_client, ost_brw_server);
1216 EXPORT_SYMBOL(RQF_OST_BRW);
1217
1218 const struct req_format RQF_OST_STATFS =
1219         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1220 EXPORT_SYMBOL(RQF_OST_STATFS);
1221
1222 const struct req_format RQF_OST_SET_GRANT_INFO =
1223         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", obd_set_info_client,
1224                          ost_body_only);
1225 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1226
1227 const struct req_format RQF_OST_GET_INFO_GENERIC =
1228         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1229                                         ost_get_info_generic_server);
1230 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1231
1232 const struct req_format RQF_OST_GET_INFO_LAST_ID =
1233         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1234                                                 ost_get_last_id_server);
1235 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1236
1237 const struct req_format RQF_OST_GET_INFO_FIEMAP =
1238         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1239                                                ost_get_fiemap_server);
1240 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1241
1242
1243 #if !defined(__REQ_LAYOUT_USER__)
1244
1245 int req_layout_init(void)
1246 {
1247         int i;
1248         int j;
1249         int k;
1250         struct req_format *rf = NULL;
1251
1252         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1253                 rf = (struct req_format *)req_formats[i];
1254                 rf->rf_idx = i;
1255                 for (j = 0; j < RCL_NR; ++j) {
1256                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1257                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1258                                 struct req_msg_field *field;
1259
1260                                 field = (typeof(field))rf->rf_fields[j].d[k];
1261                                 LASSERT(field->rmf_offset[i][j] == 0);
1262                                 /*
1263                                  * k + 1 to detect unused format/field
1264                                  * combinations.
1265                                  */
1266                                 field->rmf_offset[i][j] = k + 1;
1267                         }
1268                 }
1269         }
1270         return 0;
1271 }
1272 EXPORT_SYMBOL(req_layout_init);
1273
1274 void req_layout_fini(void)
1275 {
1276 }
1277 EXPORT_SYMBOL(req_layout_fini);
1278
1279 void req_capsule_init_area(struct req_capsule *pill)
1280 {
1281         int i;
1282
1283         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1284                 pill->rc_area[RCL_CLIENT][i] = -1;
1285                 pill->rc_area[RCL_SERVER][i] = -1;
1286         }
1287 }
1288 EXPORT_SYMBOL(req_capsule_init_area);
1289
1290 /*
1291  * Initialize capsule.
1292  *
1293  * @area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1294  * variable-sized fields.
1295  */
1296 void req_capsule_init(struct req_capsule *pill,
1297                       struct ptlrpc_request *req,
1298                       enum req_location location)
1299 {
1300         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1301
1302         memset(pill, 0, sizeof *pill);
1303         pill->rc_req = req;
1304         pill->rc_loc = location;
1305         req_capsule_init_area(pill);
1306 }
1307 EXPORT_SYMBOL(req_capsule_init);
1308
1309 void req_capsule_fini(struct req_capsule *pill)
1310 {
1311 }
1312 EXPORT_SYMBOL(req_capsule_fini);
1313
1314 static int __req_format_is_sane(const struct req_format *fmt)
1315 {
1316         return
1317                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1318                 req_formats[fmt->rf_idx] == fmt;
1319 }
1320
1321 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1322                                     enum req_location loc)
1323 {
1324         struct ptlrpc_request *req;
1325
1326         req = pill->rc_req;
1327         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1328 }
1329
1330 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1331 {
1332         LASSERT(pill->rc_fmt == NULL);
1333         LASSERT(__req_format_is_sane(fmt));
1334
1335         pill->rc_fmt = fmt;
1336 }
1337 EXPORT_SYMBOL(req_capsule_set);
1338
1339 int req_capsule_filled_sizes(struct req_capsule *pill,
1340                            enum req_location loc)
1341 {
1342         const struct req_format *fmt = pill->rc_fmt;
1343         int                      i;
1344
1345         LASSERT(fmt != NULL);
1346
1347         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1348                 if (pill->rc_area[loc][i] == -1) {
1349                         pill->rc_area[loc][i] =
1350                                             fmt->rf_fields[loc].d[i]->rmf_size;
1351                         if (pill->rc_area[loc][i] == -1) {
1352                                 /* skip the following fields */
1353                                 LASSERT(loc != RCL_SERVER);
1354                                 break;
1355                         }
1356                 }
1357         }
1358         return i;
1359 }
1360 EXPORT_SYMBOL(req_capsule_filled_sizes);
1361
1362 int req_capsule_server_pack(struct req_capsule *pill)
1363 {
1364         const struct req_format *fmt;
1365         int                      count;
1366         int                      rc;
1367
1368         LASSERT(pill->rc_loc == RCL_SERVER);
1369         fmt = pill->rc_fmt;
1370         LASSERT(fmt != NULL);
1371
1372         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1373         rc = lustre_pack_reply(pill->rc_req, count,
1374                                pill->rc_area[RCL_SERVER], NULL);
1375         if (rc != 0) {
1376                 DEBUG_REQ(D_ERROR, pill->rc_req,
1377                           "Cannot pack %d fields in format `%s': ",
1378                           count, fmt->rf_name);
1379         }
1380         return rc;
1381 }
1382 EXPORT_SYMBOL(req_capsule_server_pack);
1383
1384 static int __req_capsule_offset(const struct req_capsule *pill,
1385                                 const struct req_msg_field *field,
1386                                 enum req_location loc)
1387 {
1388         int offset;
1389
1390         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1391         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1392                             pill->rc_fmt->rf_name,
1393                             field->rmf_name, offset, loc);
1394         offset --;
1395
1396         LASSERT(0 <= offset && offset < REQ_MAX_FIELD_NR);
1397         return offset;
1398 }
1399
1400 static void *__req_capsule_get(struct req_capsule *pill,
1401                                const struct req_msg_field *field,
1402                                enum req_location loc,
1403                                void (*swabber)( void *))
1404 {
1405         const struct req_format *fmt;
1406         struct lustre_msg       *msg;
1407         void                    *value;
1408         int                      len;
1409         int                      offset;
1410         int                      inout = loc == RCL_CLIENT;
1411
1412         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1413
1414         static const char *rcl_names[RCL_NR] = {
1415                 [RCL_CLIENT] = "client",
1416                 [RCL_SERVER] = "server"
1417         };
1418
1419         LASSERT(pill != NULL);
1420         LASSERT(pill != LP_POISON);
1421         fmt = pill->rc_fmt;
1422         LASSERT(fmt != NULL);
1423         LASSERT(fmt != LP_POISON);
1424         LASSERT(__req_format_is_sane(fmt));
1425
1426         offset = __req_capsule_offset(pill, field, loc);
1427
1428         msg = __req_msg(pill, loc);
1429         LASSERT(msg != NULL);
1430
1431         getter = (field->rmf_flags & RMF_F_STRING) ?
1432                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1433
1434         if (pill->rc_area[loc][offset] != -1)
1435                 len = pill->rc_area[loc][offset];
1436         else
1437                 len = max(field->rmf_size, 0);
1438         value = getter(msg, offset, len);
1439
1440         swabber = swabber ?: field->rmf_swabber;
1441         if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
1442             swabber != NULL && value != NULL) {
1443                 swabber(value);
1444                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1445         }
1446         if (value == NULL) {
1447                 DEBUG_REQ(D_ERROR, pill->rc_req,
1448                           "Wrong buffer for field `%s' (%d of %d) "
1449                           "in format `%s': %d vs. %d (%s)\n",
1450                           field->rmf_name, offset, lustre_msg_bufcount(msg), fmt->rf_name,
1451                           lustre_msg_buflen(msg, offset), len,
1452                           rcl_names[loc]);
1453         }
1454
1455         return value;
1456 }
1457
1458 void *req_capsule_client_get(struct req_capsule *pill,
1459                              const struct req_msg_field *field)
1460 {
1461         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1462 }
1463 EXPORT_SYMBOL(req_capsule_client_get);
1464
1465 void *req_capsule_client_swab_get(struct req_capsule *pill,
1466                                   const struct req_msg_field *field,
1467                                   void (*swabber)(void* ))
1468 {
1469         return __req_capsule_get(pill, field, RCL_CLIENT, swabber);
1470 }
1471 EXPORT_SYMBOL(req_capsule_client_swab_get);
1472
1473 void *req_capsule_client_sized_get(struct req_capsule *pill,
1474                                    const struct req_msg_field *field,
1475                                    int len)
1476 {
1477         req_capsule_set_size(pill, field, RCL_CLIENT, len);
1478         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1479 }
1480 EXPORT_SYMBOL(req_capsule_client_sized_get);
1481
1482 void *req_capsule_server_get(struct req_capsule *pill,
1483                              const struct req_msg_field *field)
1484 {
1485         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1486 }
1487 EXPORT_SYMBOL(req_capsule_server_get);
1488
1489 void *req_capsule_server_swab_get(struct req_capsule *pill,
1490                                   const struct req_msg_field *field,
1491                                   void *swabber)
1492 {
1493         return __req_capsule_get(pill, field, RCL_SERVER, swabber);
1494 }
1495 EXPORT_SYMBOL(req_capsule_server_swab_get);
1496
1497
1498 void *req_capsule_server_sized_get(struct req_capsule *pill,
1499                                    const struct req_msg_field *field,
1500                                    int len)
1501 {
1502         req_capsule_set_size(pill, field, RCL_SERVER, len);
1503         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1504 }
1505 EXPORT_SYMBOL(req_capsule_server_sized_get);
1506
1507 const void *req_capsule_other_get(struct req_capsule *pill,
1508                                   const struct req_msg_field *field)
1509 {
1510         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL);
1511 }
1512 EXPORT_SYMBOL(req_capsule_other_get);
1513
1514 void req_capsule_set_size(struct req_capsule *pill,
1515                           const struct req_msg_field *field,
1516                           enum req_location loc, int size)
1517 {
1518         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1519
1520         if ((size != field->rmf_size) &&
1521             (field->rmf_size != -1) &&
1522             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
1523             (size > 0)) {
1524                 CERROR("%s: field size mismatch %d != %d (%d)\n",
1525                        field->rmf_name, size, field->rmf_size, loc);
1526                 LBUG();
1527         }
1528
1529         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
1530 }
1531 EXPORT_SYMBOL(req_capsule_set_size);
1532
1533 /* NB: this function doesn't correspond with req_capsule_set_size(), which
1534  * actually sets the size in pill.rc_area[loc][offset], but this function
1535  * returns the message buflen[offset], maybe we should use another name.
1536  */
1537 int req_capsule_get_size(const struct req_capsule *pill,
1538                          const struct req_msg_field *field,
1539                          enum req_location loc)
1540 {
1541         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1542
1543         return lustre_msg_buflen(__req_msg(pill, loc),
1544                                  __req_capsule_offset(pill, field, loc));
1545 }
1546 EXPORT_SYMBOL(req_capsule_get_size);
1547
1548 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
1549 {
1550         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
1551                                pill->rc_fmt->rf_fields[loc].nr,
1552                                pill->rc_area[loc]);
1553 }
1554
1555 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
1556                          enum req_location loc)
1557 {
1558         int size, i = 0;
1559
1560         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
1561         if (size < 0)
1562                 return size;
1563
1564         for (; i < fmt->rf_fields[loc].nr; ++i)
1565                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
1566                         size += size_round(fmt->rf_fields[loc].d[i]->rmf_size);
1567         return size;
1568 }
1569
1570 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1571
1572 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
1573 {
1574         int i;
1575         int j;
1576
1577         const struct req_format *old;
1578
1579         LASSERT(pill->rc_fmt != NULL);
1580         LASSERT(__req_format_is_sane(fmt));
1581
1582         old = pill->rc_fmt;
1583         /*
1584          * Sanity checking...
1585          */
1586         for (i = 0; i < RCL_NR; ++i) {
1587                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
1588                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
1589                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
1590                 }
1591                 /*
1592                  * Last field in old format can be shorter than in new.
1593                  */
1594                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
1595                         FMT_FIELD(old, i, j)->rmf_size);
1596         }
1597
1598         pill->rc_fmt = fmt;
1599 }
1600 EXPORT_SYMBOL(req_capsule_extend);
1601
1602 int req_capsule_has_field(const struct req_capsule *pill,
1603                           const struct req_msg_field *field,
1604                           enum req_location loc)
1605 {
1606         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1607
1608         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1609 }
1610 EXPORT_SYMBOL(req_capsule_has_field);
1611
1612 int req_capsule_field_present(const struct req_capsule *pill,
1613                               const struct req_msg_field *field,
1614                               enum req_location loc)
1615 {
1616         int offset;
1617
1618         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1619         LASSERT(req_capsule_has_field(pill, field, loc));
1620
1621         offset = __req_capsule_offset(pill, field, loc);
1622         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
1623 }
1624 EXPORT_SYMBOL(req_capsule_field_present);
1625
1626 void req_capsule_shrink(struct req_capsule *pill,
1627                         const struct req_msg_field *field,
1628                         unsigned int newlen,
1629                         enum req_location loc)
1630 {
1631         const struct req_format *fmt;
1632         struct lustre_msg       *msg;
1633         int                      len;
1634         int                      offset;
1635
1636         fmt = pill->rc_fmt;
1637         LASSERT(fmt != NULL);
1638         LASSERT(__req_format_is_sane(fmt));
1639         LASSERT(req_capsule_has_field(pill, field, loc));
1640         LASSERT(req_capsule_field_present(pill, field, loc));
1641
1642         offset = __req_capsule_offset(pill, field, loc);
1643
1644         msg = __req_msg(pill, loc);
1645         len = lustre_msg_buflen(msg, offset);
1646         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
1647                                 fmt->rf_name, field->rmf_name, len, newlen);
1648
1649         if (loc == RCL_CLIENT)
1650                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
1651                                                             1);
1652         else
1653                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
1654                                                             1);
1655 }
1656 EXPORT_SYMBOL(req_capsule_shrink);
1657
1658 /* __REQ_LAYOUT_USER__ */
1659 #endif