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