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 *mds_getinfo_client[] = {
 290         &RMF_PTLRPC_BODY,
 291         &RMF_GETINFO_KEY,
 292         &RMF_GETINFO_VALLEN
 293 };
 294
 295 static const struct req_msg_field *mds_getinfo_server[] = {
 296         &RMF_PTLRPC_BODY,
 297         &RMF_GETINFO_VAL,
 298 };
 299
 300 static const struct req_msg_field *ldlm_enqueue_client[] = {
 301         &RMF_PTLRPC_BODY,
 302         &RMF_DLM_REQ
 303 };
 304
 305 static const struct req_msg_field *ldlm_enqueue_server[] = {
 306         &RMF_PTLRPC_BODY,
 307         &RMF_DLM_REP
 308 };
 309
 310 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 311         &RMF_PTLRPC_BODY,
 312         &RMF_DLM_REP,
 313         &RMF_DLM_LVB
 314 };
 315
 316 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 317         &RMF_PTLRPC_BODY,
 318         &RMF_DLM_REQ,
 319         &RMF_DLM_LVB
 320 };
 321
 322 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 323         &RMF_PTLRPC_BODY,
 324         &RMF_DLM_LVB
 325 };
 326
 327 static const struct req_msg_field *ldlm_intent_client[] = {
 328         &RMF_PTLRPC_BODY,
 329         &RMF_DLM_REQ,
 330         &RMF_LDLM_INTENT,
 331         &RMF_REC_REINT
 332 };
 333
 334 static const struct req_msg_field *ldlm_intent_server[] = {
 335         &RMF_PTLRPC_BODY,
 336         &RMF_DLM_REP,
 337         &RMF_MDT_BODY,
 338         &RMF_MDT_MD,
 339         &RMF_ACL
 340 };
 341
 342 static const struct req_msg_field *ldlm_intent_open_server[] = {
 343         &RMF_PTLRPC_BODY,
 344         &RMF_DLM_REP,
 345         &RMF_MDT_BODY,
 346         &RMF_MDT_MD,
 347         &RMF_ACL,
 348         &RMF_CAPA1,
 349         &RMF_CAPA2
 350 };
 351
 352 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 353         &RMF_PTLRPC_BODY,
 354         &RMF_DLM_REQ,
 355         &RMF_LDLM_INTENT,
 356         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 357         &RMF_CAPA1,
 358         &RMF_NAME
 359 };
 360
 361 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 362         &RMF_PTLRPC_BODY,
 363         &RMF_DLM_REP,
 364         &RMF_MDT_BODY,
 365         &RMF_MDT_MD,
 366         &RMF_ACL,
 367         &RMF_CAPA1
 368 };
 369
 370 static const struct req_msg_field *ldlm_intent_create_client[] = {
 371         &RMF_PTLRPC_BODY,
 372         &RMF_DLM_REQ,
 373         &RMF_LDLM_INTENT,
 374         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 375         &RMF_CAPA1,
 376         &RMF_NAME,
 377         &RMF_EADATA
 378 };
 379
 380 static const struct req_msg_field *ldlm_intent_open_client[] = {
 381         &RMF_PTLRPC_BODY,
 382         &RMF_DLM_REQ,
 383         &RMF_LDLM_INTENT,
 384         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 385         &RMF_CAPA1,
 386         &RMF_CAPA2,
 387         &RMF_NAME,
 388         &RMF_EADATA,
 389         &RMF_REC_JOINFILE
 390 };
 391
 392 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 393         &RMF_PTLRPC_BODY,
 394         &RMF_DLM_REQ,
 395         &RMF_LDLM_INTENT,
 396         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 397         &RMF_CAPA1,
 398         &RMF_NAME
 399 };
 400
 401 static const struct req_msg_field *mds_getxattr_client[] = {
 402         &RMF_PTLRPC_BODY,
 403         &RMF_MDT_BODY,
 404         &RMF_CAPA1,
 405         &RMF_NAME,
 406         &RMF_EADATA
 407 };
 408
 409 static const struct req_msg_field *mds_getxattr_server[] = {
 410         &RMF_PTLRPC_BODY,
 411         &RMF_MDT_BODY,
 412         &RMF_EADATA
 413 };
 414
 415 static const struct req_msg_field *mds_getattr_server[] = {
 416         &RMF_PTLRPC_BODY,
 417         &RMF_MDT_BODY,
 418         &RMF_MDT_MD,
 419         &RMF_ACL,
 420         &RMF_CAPA1,
 421         &RMF_CAPA2
 422 };
 423
 424 static const struct req_msg_field *mds_setattr_server[] = {
 425         &RMF_PTLRPC_BODY,
 426         &RMF_MDT_BODY,
 427         &RMF_MDT_MD,
 428         &RMF_ACL,
 429         &RMF_CAPA1,
 430         &RMF_CAPA2
 431 };
 432
 433 static const struct req_msg_field *llog_catinfo_client[] = {
 434         &RMF_PTLRPC_BODY,
 435         &RMF_NAME,
 436         &RMF_STRING
 437 };
 438
 439 static const struct req_msg_field *llog_catinfo_server[] = {
 440         &RMF_PTLRPC_BODY,
 441         &RMF_STRING
 442 };
 443
 444 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 445         &RMF_PTLRPC_BODY,
 446         &RMF_LLOGD_BODY,
 447         &RMF_NAME
 448 };
 449
 450 static const struct req_msg_field *llogd_body_only[] = {
 451         &RMF_PTLRPC_BODY,
 452         &RMF_LLOGD_BODY
 453 };
 454
 455 static const struct req_msg_field *llog_log_hdr_only[] = {
 456         &RMF_PTLRPC_BODY,
 457         &RMF_LLOG_LOG_HDR
 458 };
 459
 460 static const struct req_msg_field *llogd_conn_body_only[] = {
 461         &RMF_PTLRPC_BODY,
 462         &RMF_LLOGD_CONN_BODY
 463 };
 464
 465 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 466         &RMF_PTLRPC_BODY,
 467         &RMF_LLOGD_BODY,
 468         &RMF_EADATA
 469 };
 470
 471 static const struct req_msg_field *ost_body_only[] = {
 472         &RMF_PTLRPC_BODY,
 473         &RMF_OST_BODY
 474 };
 475
 476 static const struct req_msg_field *ost_body_capa[] = {
 477         &RMF_PTLRPC_BODY,
 478         &RMF_OST_BODY,
 479         &RMF_CAPA1
 480 };
 481
 482 static const struct req_msg_field *ost_destroy_client[] = {
 483         &RMF_PTLRPC_BODY,
 484         &RMF_OST_BODY,
 485         &RMF_DLM_REQ,
 486         &RMF_CAPA1
 487 };
 488
 489
 490 static const struct req_msg_field *ost_brw_client[] = {
 491         &RMF_PTLRPC_BODY,
 492         &RMF_OST_BODY,
 493         &RMF_OBD_IOOBJ,
 494         &RMF_NIOBUF_REMOTE,
 495         &RMF_CAPA1
 496 };
 497
 498 static const struct req_msg_field *ost_brw_server[] = {
 499         &RMF_PTLRPC_BODY,
 500         &RMF_OST_BODY,
 501         &RMF_NIOBUF_REMOTE
 502 };
 503
 504 static const struct req_msg_field *ost_set_info_client[] = {
 505         &RMF_PTLRPC_BODY,
 506         &RMF_SETINFO_KEY,
 507         &RMF_SETINFO_VAL
 508 };
 509
 510 static const struct req_msg_field *ost_get_info_generic_server[] = {
 511         &RMF_PTLRPC_BODY,
 512         &RMF_GENERIC_DATA,
 513 };
 514
 515 static const struct req_msg_field *ost_get_info_generic_client[] = {
 516         &RMF_PTLRPC_BODY,
 517         &RMF_SETINFO_KEY
 518 };
 519
 520 static const struct req_msg_field *ost_get_last_id_server[] = {
 521         &RMF_PTLRPC_BODY,
 522         &RMF_OBD_ID
 523 };
 524
 525 static const struct req_msg_field *ost_get_fiemap_client[] = {
 526         &RMF_PTLRPC_BODY,
 527         &RMF_FIEMAP_KEY,
 528         &RMF_FIEMAP_VAL
 529 };
 530
 531 static const struct req_msg_field *ost_get_fiemap_server[] = {
 532         &RMF_PTLRPC_BODY,
 533         &RMF_FIEMAP_VAL
 534 };
 535
 536 static const struct req_format *req_formats[] = {
 537         &RQF_OBD_PING,
 538         &RQF_SEC_CTX,
 539         &RQF_MGS_TARGET_REG,
 540         &RQF_MGS_SET_INFO,
 541         &RQF_SEQ_QUERY,
 542         &RQF_FLD_QUERY,
 543         &RQF_MDS_CONNECT,
 544         &RQF_MDS_DISCONNECT,
 545         &RQF_MDS_SET_INFO,
 546         &RQF_MDS_GET_INFO,
 547         &RQF_MDS_GETSTATUS,
 548         &RQF_MDS_STATFS,
 549         &RQF_MDS_GETATTR,
 550         &RQF_MDS_GETATTR_NAME,
 551         &RQF_MDS_GETXATTR,
 552         &RQF_MDS_SYNC,
 553         &RQF_MDS_CLOSE,
 554         &RQF_MDS_PIN,
 555         &RQF_MDS_UNPIN,
 556         &RQF_MDS_READPAGE,
 557         &RQF_MDS_WRITEPAGE,
 558         &RQF_MDS_IS_SUBDIR,
 559         &RQF_MDS_DONE_WRITING,
 560         &RQF_MDS_REINT,
 561         &RQF_MDS_REINT_CREATE,
 562         &RQF_MDS_REINT_CREATE_RMT_ACL,
 563         &RQF_MDS_REINT_CREATE_SLAVE,
 564         &RQF_MDS_REINT_CREATE_SYM,
 565         &RQF_MDS_REINT_OPEN,
 566         &RQF_MDS_REINT_UNLINK,
 567         &RQF_MDS_REINT_LINK,
 568         &RQF_MDS_REINT_RENAME,
 569         &RQF_MDS_REINT_SETATTR,
 570         &RQF_MDS_REINT_SETXATTR,
 571         &RQF_MDS_QUOTACHECK,
 572         &RQF_MDS_QUOTACTL,
 573         &RQF_MDS_QUOTA_DQACQ,
 574         &RQF_QC_CALLBACK,
 575         &RQF_OST_CONNECT,
 576         &RQF_OST_DISCONNECT,
 577         &RQF_OST_QUOTACHECK,
 578         &RQF_OST_QUOTACTL,
 579         &RQF_OST_QUOTA_ADJUST_QUNIT,
 580         &RQF_OST_GETATTR,
 581         &RQF_OST_SETATTR,
 582         &RQF_OST_CREATE,
 583         &RQF_OST_PUNCH,
 584         &RQF_OST_SYNC,
 585         &RQF_OST_DESTROY,
 586         &RQF_OST_BRW,
 587         &RQF_OST_STATFS,
 588         &RQF_OST_SET_INFO,
 589         &RQF_OST_SET_GRANT_INFO,
 590         &RQF_OST_GET_INFO_GENERIC,
 591         &RQF_OST_GET_INFO_LAST_ID,
 592         &RQF_OST_GET_INFO_FIEMAP,
 593         &RQF_LDLM_ENQUEUE,
 594         &RQF_LDLM_ENQUEUE_LVB,
 595         &RQF_LDLM_CONVERT,
 596         &RQF_LDLM_CANCEL,
 597         &RQF_LDLM_CALLBACK,
 598         &RQF_LDLM_CP_CALLBACK,
 599         &RQF_LDLM_BL_CALLBACK,
 600         &RQF_LDLM_GL_CALLBACK,
 601         &RQF_LDLM_INTENT,
 602         &RQF_LDLM_INTENT_GETATTR,
 603         &RQF_LDLM_INTENT_OPEN,
 604         &RQF_LDLM_INTENT_CREATE,
 605         &RQF_LDLM_INTENT_UNLINK,
 606         &RQF_LOG_CANCEL,
 607         &RQF_LLOG_CATINFO,
 608         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 609         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 610         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 611         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 612         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 613         &RQF_LLOG_ORIGIN_CONNECT
 614 };
 615
 616 struct req_msg_field {
 617         __u32       rmf_flags;
 618         const char *rmf_name;
 619         /**
 620          * Field length. (-1) means "variable length".
 621          */
 622         int         rmf_size;
 623         void      (*rmf_swabber)(void *);
 624         int         rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 625 };
 626
 627 enum rmf_flags {
 628         RMF_F_STRING = 1 << 0,
 629         RMF_F_NO_SIZE_CHECK = 1 << 1
 630 };
 631
 632 struct req_capsule;
 633
 634 /*
 635  * Request fields.
 636  */
 637 #define DEFINE_MSGF(name, flags, size, swabber) {       \
 638         .rmf_name    = (name),                          \
 639         .rmf_flags   = (flags),                         \
 640         .rmf_size    = (size),                          \
 641         .rmf_swabber = (void (*)(void*))(swabber)       \
 642 }
 643
 644 const struct req_msg_field RMF_GENERIC_DATA =
 645         DEFINE_MSGF("generic_data", 0,
 646                     -1, NULL);
 647 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 648
 649 const struct req_msg_field RMF_MGS_TARGET_INFO =
 650         DEFINE_MSGF("mgs_target_info", 0,
 651                     sizeof(struct mgs_target_info),
 652                     lustre_swab_mgs_target_info);
 653 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 654
 655 const struct req_msg_field RMF_MGS_SEND_PARAM =
 656         DEFINE_MSGF("mgs_send_param", 0,
 657                     sizeof(struct mgs_send_param),
 658                     NULL);
 659 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 660
 661 const struct req_msg_field RMF_SETINFO_VAL =
 662         DEFINE_MSGF("setinfo_val", 0, -1, NULL);
 663 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 664
 665 const struct req_msg_field RMF_GETINFO_KEY =
 666         DEFINE_MSGF("getinfo_key", 0, -1, NULL);
 667 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 668
 669 const struct req_msg_field RMF_GETINFO_VALLEN =
 670         DEFINE_MSGF("getinfo_vallen", 0,
 671                     sizeof(__u32), lustre_swab_generic_32s);
 672 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 673
 674 const struct req_msg_field RMF_GETINFO_VAL =
 675         DEFINE_MSGF("getinfo_val", 0, -1, NULL);
 676 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 677
 678 const struct req_msg_field RMF_SEQ_OPC =
 679         DEFINE_MSGF("seq_query_opc", 0,
 680                     sizeof(__u32), lustre_swab_generic_32s);
 681 EXPORT_SYMBOL(RMF_SEQ_OPC);
 682
 683 const struct req_msg_field RMF_SEQ_RANGE =
 684         DEFINE_MSGF("seq_query_range", 0,
 685                     sizeof(struct lu_seq_range), lustre_swab_lu_seq_range);
 686 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 687
 688 const struct req_msg_field RMF_FLD_OPC =
 689         DEFINE_MSGF("fld_query_opc", 0,
 690                     sizeof(__u32), lustre_swab_generic_32s);
 691 EXPORT_SYMBOL(RMF_FLD_OPC);
 692
 693 const struct req_msg_field RMF_FLD_MDFLD =
 694         DEFINE_MSGF("fld_query_mdfld", 0,
 695                     sizeof(struct lu_seq_range), lustre_swab_lu_seq_range);
 696 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 697
 698 const struct req_msg_field RMF_MDT_BODY =
 699         DEFINE_MSGF("mdt_body", 0,
 700                     sizeof(struct mdt_body), lustre_swab_mdt_body);
 701 EXPORT_SYMBOL(RMF_MDT_BODY);
 702
 703 const struct req_msg_field RMF_OBD_QUOTACTL =
 704         DEFINE_MSGF("obd_quotactl", 0,
 705                     sizeof(struct obd_quotactl), lustre_swab_obd_quotactl);
 706 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 707
 708 const struct req_msg_field RMF_QUOTA_ADJUST_QUNIT =
 709         DEFINE_MSGF("quota_adjust_qunit", 0,
 710                     sizeof(struct quota_adjust_qunit),
 711                     lustre_swab_quota_adjust_qunit);
 712 EXPORT_SYMBOL(RMF_QUOTA_ADJUST_QUNIT);
 713
 714 const struct req_msg_field RMF_QUNIT_DATA =
 715         DEFINE_MSGF("qunit_data", 0,
 716                     sizeof(struct qunit_data), NULL);
 717 EXPORT_SYMBOL(RMF_QUNIT_DATA);
 718
 719 const struct req_msg_field RMF_MDT_EPOCH =
 720         DEFINE_MSGF("mdt_epoch", 0,
 721                     sizeof(struct mdt_epoch), lustre_swab_mdt_epoch);
 722 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 723
 724 const struct req_msg_field RMF_PTLRPC_BODY =
 725         DEFINE_MSGF("ptlrpc_body", 0,
 726                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body);
 727 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 728
 729 const struct req_msg_field RMF_OBD_STATFS =
 730         DEFINE_MSGF("obd_statfs", 0,
 731                     sizeof(struct obd_statfs), lustre_swab_obd_statfs);
 732 EXPORT_SYMBOL(RMF_OBD_STATFS);
 733
 734 const struct req_msg_field RMF_SETINFO_KEY =
 735         DEFINE_MSGF("setinfo_key", 0, -1, NULL);
 736 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 737
 738 const struct req_msg_field RMF_NAME =
 739         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL);
 740 EXPORT_SYMBOL(RMF_NAME);
 741
 742 const struct req_msg_field RMF_SYMTGT =
 743         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL);
 744 EXPORT_SYMBOL(RMF_SYMTGT);
 745
 746 const struct req_msg_field RMF_TGTUUID =
 747         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 748 EXPORT_SYMBOL(RMF_TGTUUID);
 749
 750 const struct req_msg_field RMF_CLUUID =
 751         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 752 EXPORT_SYMBOL(RMF_CLUUID);
 753
 754 const struct req_msg_field RMF_STRING =
 755         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL);
 756 EXPORT_SYMBOL(RMF_STRING);
 757
 758 const struct req_msg_field RMF_LLOGD_BODY =
 759         DEFINE_MSGF("llogd_body", 0,
 760                     sizeof(struct llogd_body), lustre_swab_llogd_body);
 761 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 762
 763 const struct req_msg_field RMF_LLOG_LOG_HDR =
 764         DEFINE_MSGF("llog_log_hdr", 0,
 765                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr);
 766 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 767
 768 const struct req_msg_field RMF_LLOGD_CONN_BODY =
 769         DEFINE_MSGF("llogd_conn_body", 0,
 770                     sizeof(struct llogd_conn_body),
 771                     lustre_swab_llogd_conn_body);
 772 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 773
 774 /*
 775  * connection handle received in MDS_CONNECT request.
 776  *
 777  * XXX no swabbing?
 778  */
 779 const struct req_msg_field RMF_CONN =
 780         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL);
 781 EXPORT_SYMBOL(RMF_CONN);
 782
 783 const struct req_msg_field RMF_CONNECT_DATA =
 784         DEFINE_MSGF("cdata",
 785                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
 786                     sizeof(struct obd_connect_data), lustre_swab_connect);
 787 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 788
 789 const struct req_msg_field RMF_DLM_REQ =
 790         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
 791                     sizeof(struct ldlm_request), lustre_swab_ldlm_request);
 792 EXPORT_SYMBOL(RMF_DLM_REQ);
 793
 794 const struct req_msg_field RMF_DLM_REP =
 795         DEFINE_MSGF("dlm_rep", 0,
 796                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply);
 797 EXPORT_SYMBOL(RMF_DLM_REP);
 798
 799 const struct req_msg_field RMF_LDLM_INTENT =
 800         DEFINE_MSGF("ldlm_intent", 0,
 801                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent);
 802 EXPORT_SYMBOL(RMF_LDLM_INTENT);
 803
 804 const struct req_msg_field RMF_DLM_LVB =
 805         DEFINE_MSGF("dlm_lvb", 0, sizeof(struct ost_lvb), NULL);
 806 EXPORT_SYMBOL(RMF_DLM_LVB);
 807
 808 const struct req_msg_field RMF_MDT_MD =
 809         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL);
 810 EXPORT_SYMBOL(RMF_MDT_MD);
 811
 812 const struct req_msg_field RMF_REC_REINT =
 813         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
 814                     lustre_swab_mdt_rec_reint);
 815 EXPORT_SYMBOL(RMF_REC_REINT);
 816
 817 const struct req_msg_field RMF_REC_JOINFILE =
 818         DEFINE_MSGF("rec_joinfile", 0, sizeof(struct mdt_rec_join),
 819                     lustre_swab_mdt_rec_join);
 820 EXPORT_SYMBOL(RMF_REC_JOINFILE);
 821
 822 /* FIXME: this length should be defined as a macro */
 823 const struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1, NULL);
 824 EXPORT_SYMBOL(RMF_EADATA);
 825
 826 const struct req_msg_field RMF_ACL =
 827         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
 828                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL);
 829 EXPORT_SYMBOL(RMF_ACL);
 830
 831 const struct req_msg_field RMF_LOGCOOKIES =
 832         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
 833                     sizeof(struct llog_cookie), NULL);
 834 EXPORT_SYMBOL(RMF_LOGCOOKIES);
 835
 836 const struct req_msg_field RMF_CAPA1 =
 837         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 838                     lustre_swab_lustre_capa);
 839 EXPORT_SYMBOL(RMF_CAPA1);
 840
 841 const struct req_msg_field RMF_CAPA2 =
 842         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 843                     lustre_swab_lustre_capa);
 844 EXPORT_SYMBOL(RMF_CAPA2);
 845
 846 /*
 847  * OST request field.
 848  */
 849 const struct req_msg_field RMF_OST_BODY =
 850         DEFINE_MSGF("ost_body", 0,
 851                     sizeof(struct ost_body), lustre_swab_ost_body);
 852 EXPORT_SYMBOL(RMF_OST_BODY);
 853
 854 const struct req_msg_field RMF_OBD_IOOBJ =
 855         DEFINE_MSGF("obd_ioobj", 0,
 856                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj);
 857 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
 858
 859 const struct req_msg_field RMF_NIOBUF_REMOTE =
 860         DEFINE_MSGF("niobuf_remote", 0, -1, lustre_swab_niobuf_remote);
 861 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
 862
 863 const struct req_msg_field RMF_OBD_ID =
 864         DEFINE_MSGF("obd_id", 0,
 865                     sizeof(obd_id), lustre_swab_ost_last_id);
 866 EXPORT_SYMBOL(RMF_OBD_ID);
 867
 868 const struct req_msg_field RMF_FIEMAP_KEY =
 869         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
 870                     lustre_swab_fiemap);
 871 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
 872
 873 const struct req_msg_field RMF_FIEMAP_VAL =
 874         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap);
 875 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
 876
 877 /*
 878  * Request formats.
 879  */
 880
 881 struct req_format {
 882         const char *rf_name;
 883         int         rf_idx;
 884         struct {
 885                 int                          nr;
 886                 const struct req_msg_field **d;
 887         } rf_fields[RCL_NR];
 888 };
 889
 890 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
 891         .rf_name   = name,                                              \
 892         .rf_fields = {                                                  \
 893                 [RCL_CLIENT] = {                                        \
 894                         .nr = client_nr,                                \
 895                         .d  = client                                    \
 896                 },                                                      \
 897                 [RCL_SERVER] = {                                        \
 898                         .nr = server_nr,                                \
 899                         .d  = server                                    \
 900                 }                                                       \
 901         }                                                               \
 902 }
 903
 904 #define DEFINE_REQ_FMT0(name, client, server)                                  \
 905 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
 906
 907 const struct req_format RQF_OBD_PING =
 908         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
 909 EXPORT_SYMBOL(RQF_OBD_PING);
 910
 911 const struct req_format RQF_SEC_CTX =
 912         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
 913 EXPORT_SYMBOL(RQF_SEC_CTX);
 914
 915 const struct req_format RQF_MGS_TARGET_REG =
 916         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
 917                          mgs_target_info_only);
 918 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
 919
 920 const struct req_format RQF_MGS_SET_INFO =
 921         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
 922                          mgs_set_info);
 923 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
 924
 925 const struct req_format RQF_SEQ_QUERY =
 926         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
 927 EXPORT_SYMBOL(RQF_SEQ_QUERY);
 928
 929 const struct req_format RQF_FLD_QUERY =
 930         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
 931 EXPORT_SYMBOL(RQF_FLD_QUERY);
 932
 933 const struct req_format RQF_LOG_CANCEL =
 934         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
 935 EXPORT_SYMBOL(RQF_LOG_CANCEL);
 936
 937 const struct req_format RQF_MDS_QUOTACHECK =
 938         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
 939 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
 940
 941 const struct req_format RQF_OST_QUOTACHECK =
 942         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
 943 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
 944
 945 const struct req_format RQF_MDS_QUOTACTL =
 946         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
 947 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
 948
 949 const struct req_format RQF_OST_QUOTACTL =
 950         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
 951 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
 952
 953 const struct req_format RQF_OST_QUOTA_ADJUST_QUNIT =
 954         DEFINE_REQ_FMT0("OST_QUOTA_ADJUST_QUNIT", quota_adjust_qunit_only,
 955                         quota_adjust_qunit_only);
 956 EXPORT_SYMBOL(RQF_OST_QUOTA_ADJUST_QUNIT);
 957
 958 const struct req_format RQF_QC_CALLBACK =
 959         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
 960 EXPORT_SYMBOL(RQF_QC_CALLBACK);
 961
 962 const struct req_format RQF_MDS_QUOTA_DQACQ =
 963         DEFINE_REQ_FMT0("MDS_QUOTA_DQACQ", qunit_data_only, qunit_data_only);
 964 EXPORT_SYMBOL(RQF_MDS_QUOTA_DQACQ);
 965
 966 const struct req_format RQF_MDS_GETSTATUS =
 967         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
 968 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
 969
 970 const struct req_format RQF_MDS_STATFS =
 971         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
 972 EXPORT_SYMBOL(RQF_MDS_STATFS);
 973
 974 const struct req_format RQF_MDS_SYNC =
 975         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
 976 EXPORT_SYMBOL(RQF_MDS_SYNC);
 977
 978 const struct req_format RQF_MDS_GETATTR =
 979         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
 980 EXPORT_SYMBOL(RQF_MDS_GETATTR);
 981
 982 const struct req_format RQF_MDS_GETXATTR =
 983         DEFINE_REQ_FMT0("MDS_GETXATTR",
 984                         mds_getxattr_client, mds_getxattr_server);
 985 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
 986
 987 const struct req_format RQF_MDS_GETATTR_NAME =
 988         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
 989                         mds_getattr_name_client, mds_getattr_server);
 990 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
 991
 992 const struct req_format RQF_MDS_REINT =
 993         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
 994 EXPORT_SYMBOL(RQF_MDS_REINT);
 995
 996 const struct req_format RQF_MDS_REINT_CREATE =
 997         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
 998                         mds_reint_create_client, mdt_body_capa);
 999 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
1000
1001 const struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
1002         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
1003                         mds_reint_create_rmt_acl_client, mdt_body_capa);
1004 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
1005
1006 const struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1007         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1008                         mds_reint_create_slave_client, mdt_body_capa);
1009 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1010
1011 const struct req_format RQF_MDS_REINT_CREATE_SYM =
1012         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1013                         mds_reint_create_sym_client, mdt_body_capa);
1014 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1015
1016 const struct req_format RQF_MDS_REINT_OPEN =
1017         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1018                         mds_reint_open_client, mds_reint_open_server);
1019 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1020
1021 const struct req_format RQF_MDS_REINT_UNLINK =
1022         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1023                         mds_last_unlink_server);
1024 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1025
1026 const struct req_format RQF_MDS_REINT_LINK =
1027         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1028                         mds_reint_link_client, mdt_body_only);
1029 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1030
1031 const struct req_format RQF_MDS_REINT_RENAME =
1032         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1033                         mds_last_unlink_server);
1034 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1035
1036 const struct req_format RQF_MDS_REINT_SETATTR =
1037         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1038                         mds_reint_setattr_client, mds_setattr_server);
1039 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1040
1041 const struct req_format RQF_MDS_REINT_SETXATTR =
1042         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1043                         mds_reint_setxattr_client, mdt_body_only);
1044 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1045
1046 const struct req_format RQF_MDS_CONNECT =
1047         DEFINE_REQ_FMT0("MDS_CONNECT",
1048                         obd_connect_client, obd_connect_server);
1049 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1050
1051 const struct req_format RQF_MDS_DISCONNECT =
1052         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1053 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1054
1055 const struct req_format RQF_MDS_SET_INFO =
1056         DEFINE_REQ_FMT0("MDS_SET_INFO", mds_set_info_client, empty);
1057 EXPORT_SYMBOL(RQF_MDS_SET_INFO);
1058
1059 const struct req_format RQF_MDS_GET_INFO =
1060         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1061                         mds_getinfo_server);
1062 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1063
1064 const struct req_format RQF_LDLM_ENQUEUE =
1065         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1066                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1067 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1068
1069 const struct req_format RQF_LDLM_ENQUEUE_LVB =
1070         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1071                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1072 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1073
1074 const struct req_format RQF_LDLM_CONVERT =
1075         DEFINE_REQ_FMT0("LDLM_CONVERT",
1076                         ldlm_enqueue_client, ldlm_enqueue_server);
1077 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1078
1079 const struct req_format RQF_LDLM_CANCEL =
1080         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1081 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1082
1083 const struct req_format RQF_LDLM_CALLBACK =
1084         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1085 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1086
1087 const struct req_format RQF_LDLM_CP_CALLBACK =
1088         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1089 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1090
1091 const struct req_format RQF_LDLM_BL_CALLBACK =
1092         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1093 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1094
1095 const struct req_format RQF_LDLM_GL_CALLBACK =
1096         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1097                         ldlm_gl_callback_server);
1098 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1099
1100 const struct req_format RQF_LDLM_INTENT =
1101         DEFINE_REQ_FMT0("LDLM_INTENT",
1102                         ldlm_intent_client, ldlm_intent_server);
1103 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1104
1105 const struct req_format RQF_LDLM_INTENT_GETATTR =
1106         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1107                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1108 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1109
1110 const struct req_format RQF_LDLM_INTENT_OPEN =
1111         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1112                         ldlm_intent_open_client, ldlm_intent_open_server);
1113 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1114
1115 const struct req_format RQF_LDLM_INTENT_CREATE =
1116         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1117                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1118 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1119
1120 const struct req_format RQF_LDLM_INTENT_UNLINK =
1121         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1122                         ldlm_intent_unlink_client, ldlm_intent_server);
1123 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1124
1125 const struct req_format RQF_MDS_CLOSE =
1126         DEFINE_REQ_FMT0("MDS_CLOSE",
1127                         mdt_close_client, mds_last_unlink_server);
1128 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1129
1130 const struct req_format RQF_MDS_PIN =
1131         DEFINE_REQ_FMT0("MDS_PIN",
1132                         mdt_body_capa, mdt_body_only);
1133 EXPORT_SYMBOL(RQF_MDS_PIN);
1134
1135 const struct req_format RQF_MDS_UNPIN =
1136         DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1137 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1138
1139 const struct req_format RQF_MDS_DONE_WRITING =
1140         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1141                         mdt_close_client, mdt_body_only);
1142 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1143
1144 const struct req_format RQF_MDS_READPAGE =
1145         DEFINE_REQ_FMT0("MDS_READPAGE",
1146                         mdt_body_capa, mdt_body_only);
1147 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1148
1149 /* This is for split */
1150 const struct req_format RQF_MDS_WRITEPAGE =
1151         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1152                         mdt_body_capa, mdt_body_only);
1153 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1154
1155 const struct req_format RQF_MDS_IS_SUBDIR =
1156         DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1157                         mdt_body_only, mdt_body_only);
1158 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1159
1160 const struct req_format RQF_LLOG_CATINFO =
1161         DEFINE_REQ_FMT0("LLOG_CATINFO",
1162                         llog_catinfo_client, llog_catinfo_server);
1163 EXPORT_SYMBOL(RQF_LLOG_CATINFO);
1164
1165 const struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1166         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1167                         llog_origin_handle_create_client, llogd_body_only);
1168 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1169
1170 const struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1171         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1172                         llogd_body_only, llogd_body_only);
1173 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1174
1175 const struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1176         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1177                         llogd_body_only, llog_origin_handle_next_block_server);
1178 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1179
1180 const struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1181         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1182                         llogd_body_only, llog_origin_handle_next_block_server);
1183 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1184
1185 const struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1186         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1187                         llogd_body_only, llog_log_hdr_only);
1188 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1189
1190 const struct req_format RQF_LLOG_ORIGIN_CONNECT =
1191         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1192 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1193
1194 const struct req_format RQF_OST_CONNECT =
1195         DEFINE_REQ_FMT0("OST_CONNECT",
1196                         obd_connect_client, obd_connect_server);
1197 EXPORT_SYMBOL(RQF_OST_CONNECT);
1198
1199 const struct req_format RQF_OST_DISCONNECT =
1200         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1201 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1202
1203 const struct req_format RQF_OST_GETATTR =
1204         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1205 EXPORT_SYMBOL(RQF_OST_GETATTR);
1206
1207 const struct req_format RQF_OST_SETATTR =
1208         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1209 EXPORT_SYMBOL(RQF_OST_SETATTR);
1210
1211 const struct req_format RQF_OST_CREATE =
1212         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1213 EXPORT_SYMBOL(RQF_OST_CREATE);
1214
1215 const struct req_format RQF_OST_PUNCH =
1216         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1217 EXPORT_SYMBOL(RQF_OST_PUNCH);
1218
1219 const struct req_format RQF_OST_SYNC =
1220         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1221 EXPORT_SYMBOL(RQF_OST_SYNC);
1222
1223 const struct req_format RQF_OST_DESTROY =
1224         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1225 EXPORT_SYMBOL(RQF_OST_DESTROY);
1226
1227 const struct req_format RQF_OST_BRW =
1228         DEFINE_REQ_FMT0("OST_BRW", ost_brw_client, ost_brw_server);
1229 EXPORT_SYMBOL(RQF_OST_BRW);
1230
1231 const struct req_format RQF_OST_STATFS =
1232         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1233 EXPORT_SYMBOL(RQF_OST_STATFS);
1234
1235 const struct req_format RQF_OST_SET_INFO =
1236         DEFINE_REQ_FMT0("OST_SET_INFO", ost_set_info_client, empty);
1237 EXPORT_SYMBOL(RQF_OST_SET_INFO);
1238
1239 const struct req_format RQF_OST_SET_GRANT_INFO =
1240         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", ost_set_info_client,
1241                          ost_body_only);
1242 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1243
1244 const struct req_format RQF_OST_GET_INFO_GENERIC =
1245         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1246                                         ost_get_info_generic_server);
1247 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1248
1249 const struct req_format RQF_OST_GET_INFO_LAST_ID =
1250         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1251                                                 ost_get_last_id_server);
1252 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1253
1254 const struct req_format RQF_OST_GET_INFO_FIEMAP =
1255         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1256                                                ost_get_fiemap_server);
1257 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1258
1259
1260 #if !defined(__REQ_LAYOUT_USER__)
1261
1262 int req_layout_init(void)
1263 {
1264         int i;
1265         int j;
1266         int k;
1267
1268         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1269                 struct req_format *rf;
1270
1271                 rf = (struct req_format *)req_formats[i];
1272                 rf->rf_idx = i;
1273                 for (j = 0; j < RCL_NR; ++j) {
1274                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1275                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1276                                 struct req_msg_field *field;
1277
1278                                 field = (typeof(field))rf->rf_fields[j].d[k];
1279                                 LASSERT(field->rmf_offset[i][j] == 0);
1280                                 /*
1281                                  * k + 1 to detect unused format/field
1282                                  * combinations.
1283                                  */
1284                                 field->rmf_offset[i][j] = k + 1;
1285                         }
1286                 }
1287         }
1288         return 0;
1289 }
1290 EXPORT_SYMBOL(req_layout_init);
1291
1292 void req_layout_fini(void)
1293 {
1294 }
1295 EXPORT_SYMBOL(req_layout_fini);
1296
1297 void req_capsule_init_area(struct req_capsule *pill)
1298 {
1299         int i;
1300
1301         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1302                 pill->rc_area[RCL_CLIENT][i] = -1;
1303                 pill->rc_area[RCL_SERVER][i] = -1;
1304         }
1305 }
1306 EXPORT_SYMBOL(req_capsule_init_area);
1307
1308 /*
1309  * Initialize capsule.
1310  *
1311  * @area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1312  * variable-sized fields.
1313  */
1314 void req_capsule_init(struct req_capsule *pill,
1315                       struct ptlrpc_request *req,
1316                       enum req_location location)
1317 {
1318         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1319
1320         memset(pill, 0, sizeof *pill);
1321         pill->rc_req = req;
1322         pill->rc_loc = location;
1323         req_capsule_init_area(pill);
1324 }
1325 EXPORT_SYMBOL(req_capsule_init);
1326
1327 void req_capsule_fini(struct req_capsule *pill)
1328 {
1329 }
1330 EXPORT_SYMBOL(req_capsule_fini);
1331
1332 static int __req_format_is_sane(const struct req_format *fmt)
1333 {
1334         return
1335                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1336                 req_formats[fmt->rf_idx] == fmt;
1337 }
1338
1339 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1340                                     enum req_location loc)
1341 {
1342         struct ptlrpc_request *req;
1343
1344         req = pill->rc_req;
1345         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1346 }
1347
1348 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1349 {
1350         LASSERT(pill->rc_fmt == NULL);
1351         LASSERT(__req_format_is_sane(fmt));
1352
1353         pill->rc_fmt = fmt;
1354 }
1355 EXPORT_SYMBOL(req_capsule_set);
1356
1357 int req_capsule_filled_sizes(struct req_capsule *pill,
1358                            enum req_location loc)
1359 {
1360         const struct req_format *fmt = pill->rc_fmt;
1361         int                      i;
1362
1363         LASSERT(fmt != NULL);
1364
1365         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1366                 if (pill->rc_area[loc][i] == -1) {
1367                         pill->rc_area[loc][i] =
1368                                             fmt->rf_fields[loc].d[i]->rmf_size;
1369                         if (pill->rc_area[loc][i] == -1) {
1370                                 /* skip the following fields */
1371                                 LASSERT(loc != RCL_SERVER);
1372                                 break;
1373                         }
1374                 }
1375         }
1376         return i;
1377 }
1378 EXPORT_SYMBOL(req_capsule_filled_sizes);
1379
1380 int req_capsule_server_pack(struct req_capsule *pill)
1381 {
1382         const struct req_format *fmt;
1383         int                      count;
1384         int                      rc;
1385
1386         LASSERT(pill->rc_loc == RCL_SERVER);
1387         fmt = pill->rc_fmt;
1388         LASSERT(fmt != NULL);
1389
1390         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1391         rc = lustre_pack_reply(pill->rc_req, count,
1392                                pill->rc_area[RCL_SERVER], NULL);
1393         if (rc != 0) {
1394                 DEBUG_REQ(D_ERROR, pill->rc_req,
1395                           "Cannot pack %d fields in format `%s': ",
1396                           count, fmt->rf_name);
1397         }
1398         return rc;
1399 }
1400 EXPORT_SYMBOL(req_capsule_server_pack);
1401
1402 static int __req_capsule_offset(const struct req_capsule *pill,
1403                                 const struct req_msg_field *field,
1404                                 enum req_location loc)
1405 {
1406         int offset;
1407
1408         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1409         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1410                             pill->rc_fmt->rf_name,
1411                             field->rmf_name, offset, loc);
1412         offset --;
1413         LASSERT(0 <= offset && offset < (sizeof(pill->rc_swabbed) << 3));
1414         return offset;
1415 }
1416
1417 static void *__req_capsule_get(struct req_capsule *pill,
1418                                const struct req_msg_field *field,
1419                                enum req_location loc,
1420                                void (*swabber)( void *))
1421 {
1422         const struct req_format *fmt;
1423         struct lustre_msg       *msg;
1424         void                    *value;
1425         int                      len;
1426         int                      offset;
1427
1428         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1429
1430         static const char *rcl_names[RCL_NR] = {
1431                 [RCL_CLIENT] = "client",
1432                 [RCL_SERVER] = "server"
1433         };
1434
1435         LASSERT(pill != NULL);
1436         LASSERT(pill != LP_POISON);
1437         fmt = pill->rc_fmt;
1438         LASSERT(fmt != NULL);
1439         LASSERT(fmt != LP_POISON);
1440         LASSERT(__req_format_is_sane(fmt));
1441
1442         offset = __req_capsule_offset(pill, field, loc);
1443
1444         msg = __req_msg(pill, loc);
1445         LASSERT(msg != NULL);
1446
1447         getter = (field->rmf_flags & RMF_F_STRING) ?
1448                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1449
1450         if (pill->rc_area[loc][offset] != -1)
1451                 len = pill->rc_area[loc][offset];
1452         else
1453                 len = max(field->rmf_size, 0);
1454         value = getter(msg, offset, len);
1455
1456         swabber = swabber ?: field->rmf_swabber;
1457         if (!(pill->rc_swabbed & (1 << offset)) && loc != pill->rc_loc &&
1458             swabber != NULL && value != NULL &&
1459             lustre_msg_swabbed(msg)) {
1460                 swabber(value);
1461                 pill->rc_swabbed |= (1 << offset);
1462         }
1463         if (value == NULL) {
1464                 DEBUG_REQ(D_ERROR, pill->rc_req,
1465                           "Wrong buffer for field `%s' (%d of %d) "
1466                           "in format `%s': %d vs. %d (%s)\n",
1467                           field->rmf_name, offset, lustre_msg_bufcount(msg), fmt->rf_name,
1468                           lustre_msg_buflen(msg, offset), len,
1469                           rcl_names[loc]);
1470         }
1471
1472         return value;
1473 }
1474
1475 void *req_capsule_client_get(struct req_capsule *pill,
1476                              const struct req_msg_field *field)
1477 {
1478         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1479 }
1480 EXPORT_SYMBOL(req_capsule_client_get);
1481
1482 void *req_capsule_client_swab_get(struct req_capsule *pill,
1483                                   const struct req_msg_field *field,
1484                                   void (*swabber)(void* ))
1485 {
1486         return __req_capsule_get(pill, field, RCL_CLIENT, swabber);
1487 }
1488 EXPORT_SYMBOL(req_capsule_client_swab_get);
1489
1490 void *req_capsule_client_sized_get(struct req_capsule *pill,
1491                                    const struct req_msg_field *field,
1492                                    int len)
1493 {
1494         req_capsule_set_size(pill, field, RCL_CLIENT, len);
1495         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1496 }
1497 EXPORT_SYMBOL(req_capsule_client_sized_get);
1498
1499 void *req_capsule_server_get(struct req_capsule *pill,
1500                              const struct req_msg_field *field)
1501 {
1502         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1503 }
1504 EXPORT_SYMBOL(req_capsule_server_get);
1505
1506 void *req_capsule_server_swab_get(struct req_capsule *pill,
1507                                   const struct req_msg_field *field,
1508                                   void *swabber)
1509 {
1510         return __req_capsule_get(pill, field, RCL_SERVER, swabber);
1511 }
1512 EXPORT_SYMBOL(req_capsule_server_swab_get);
1513
1514
1515 void *req_capsule_server_sized_get(struct req_capsule *pill,
1516                                    const struct req_msg_field *field,
1517                                    int len)
1518 {
1519         req_capsule_set_size(pill, field, RCL_SERVER, len);
1520         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1521 }
1522 EXPORT_SYMBOL(req_capsule_server_sized_get);
1523
1524 const void *req_capsule_other_get(struct req_capsule *pill,
1525                                   const struct req_msg_field *field)
1526 {
1527         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL);
1528 }
1529 EXPORT_SYMBOL(req_capsule_other_get);
1530
1531 void req_capsule_set_size(struct req_capsule *pill,
1532                           const struct req_msg_field *field,
1533                           enum req_location loc, int size)
1534 {
1535         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1536
1537         if ((size != field->rmf_size) &&
1538             (field->rmf_size != -1) &&
1539             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
1540             (size > 0)) {
1541                 CERROR("%s: field size mismatch %d != %d (%d)\n",
1542                        field->rmf_name, size, field->rmf_size, loc);
1543                 LBUG();
1544         }
1545
1546         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
1547 }
1548 EXPORT_SYMBOL(req_capsule_set_size);
1549
1550 /* NB: this function doesn't correspond with req_capsule_set_size(), which
1551  * actually sets the size in pill.rc_area[loc][offset], but this function
1552  * returns the message buflen[offset], maybe we should use another name.
1553  */
1554 int req_capsule_get_size(const struct req_capsule *pill,
1555                          const struct req_msg_field *field,
1556                          enum req_location loc)
1557 {
1558         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1559
1560         return lustre_msg_buflen(__req_msg(pill, loc),
1561                                  __req_capsule_offset(pill, field, loc));
1562 }
1563 EXPORT_SYMBOL(req_capsule_get_size);
1564
1565 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
1566 {
1567         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
1568                                pill->rc_fmt->rf_fields[loc].nr,
1569                                pill->rc_area[loc]);
1570 }
1571
1572 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
1573                          enum req_location loc)
1574 {
1575         int size, i = 0;
1576
1577         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
1578         if (size < 0)
1579                 return size;
1580
1581         for (; i < fmt->rf_fields[loc].nr; ++i)
1582                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
1583                         size += size_round(fmt->rf_fields[loc].d[i]->rmf_size);
1584         return size;
1585 }
1586
1587 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1588
1589 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
1590 {
1591         int i;
1592         int j;
1593
1594         const struct req_format *old;
1595
1596         LASSERT(pill->rc_fmt != NULL);
1597         LASSERT(__req_format_is_sane(fmt));
1598
1599         old = pill->rc_fmt;
1600         /*
1601          * Sanity checking...
1602          */
1603         for (i = 0; i < RCL_NR; ++i) {
1604                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
1605                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
1606                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
1607                 }
1608                 /*
1609                  * Last field in old format can be shorter than in new.
1610                  */
1611                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
1612                         FMT_FIELD(old, i, j)->rmf_size);
1613         }
1614         /* last field should be returned to the unswabbed state */
1615         pill->rc_swabbed &= ~(__u32)(1 << j);
1616         pill->rc_fmt = fmt;
1617 }
1618 EXPORT_SYMBOL(req_capsule_extend);
1619
1620 int req_capsule_has_field(const struct req_capsule *pill,
1621                           const struct req_msg_field *field,
1622                           enum req_location loc)
1623 {
1624         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1625
1626         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1627 }
1628 EXPORT_SYMBOL(req_capsule_has_field);
1629
1630 int req_capsule_field_present(const struct req_capsule *pill,
1631                               const struct req_msg_field *field,
1632                               enum req_location loc)
1633 {
1634         int offset;
1635
1636         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1637         LASSERT(req_capsule_has_field(pill, field, loc));
1638
1639         offset = __req_capsule_offset(pill, field, loc);
1640         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
1641 }
1642 EXPORT_SYMBOL(req_capsule_field_present);
1643
1644 void req_capsule_shrink(struct req_capsule *pill,
1645                         const struct req_msg_field *field,
1646                         unsigned int newlen,
1647                         enum req_location loc)
1648 {
1649         const struct req_format *fmt;
1650         struct lustre_msg       *msg;
1651         int                      len;
1652         int                      offset;
1653
1654         fmt = pill->rc_fmt;
1655         LASSERT(fmt != NULL);
1656         LASSERT(__req_format_is_sane(fmt));
1657         LASSERT(req_capsule_has_field(pill, field, loc));
1658         LASSERT(req_capsule_field_present(pill, field, loc));
1659
1660         offset = __req_capsule_offset(pill, field, loc);
1661
1662         msg = __req_msg(pill, loc);
1663         len = lustre_msg_buflen(msg, offset);
1664         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
1665                                 fmt->rf_name, field->rmf_name, len, newlen);
1666
1667         if (loc == RCL_CLIENT)
1668                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
1669                                                             1);
1670         else
1671                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
1672                                                             1);
1673 }
1674 EXPORT_SYMBOL(req_capsule_shrink);
1675
1676 /* __REQ_LAYOUT_USER__ */
1677 #endif