lustre/ptlrpc/layout.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  lustre/ptlrpc/layout.c
   5  *  Lustre Metadata Target (mdt) request handler
   6  *
   7  *  Copyright (c) 2006 Cluster File Systems, Inc.
   8  *   Author: Nikita Danilov <nikita@clusterfs.com>
   9  *
  10  *   This file is part of the Lustre file system, http://www.lustre.org
  11  *   Lustre is a trademark of Cluster File Systems, Inc.
  12  *
  13  *   You may have signed or agreed to another license before downloading
  14  *   this software.  If so, you are bound by the terms and conditions
  15  *   of that agreement, and the following does not apply to you.  See the
  16  *   LICENSE file included with this distribution for more information.
  17  *
  18  *   If you did not agree to a different license, then this copy of Lustre
  19  *   is open source software; you can redistribute it and/or modify it
  20  *   under the terms of version 2 of the GNU General Public License as
  21  *   published by the Free Software Foundation.
  22  *
  23  *   In either case, Lustre is distributed in the hope that it will be
  24  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  25  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *   license text for more details.
  27  */
  28
  29 #if !defined(__REQ_LAYOUT_USER__)
  30
  31 #ifndef EXPORT_SYMTAB
  32 # define EXPORT_SYMTAB
  33 #endif
  34 #define DEBUG_SUBSYSTEM S_RPC
  35
  36 #ifdef __KERNEL__
  37 #include <linux/module.h>
  38 #else
  39 # include <liblustre.h>
  40 #endif
  41
  42 /* LUSTRE_VERSION_CODE */
  43 #include <lustre_ver.h>
  44
  45 #include <obd_support.h>
  46 /* lustre_swab_mdt_body */
  47 #include <lustre/lustre_idl.h>
  48 /* obd2cli_tgt() (required by DEBUG_REQ()) */
  49 #include <obd.h>
  50
  51 /* __REQ_LAYOUT_USER__ */
  52 #endif
  53 /* struct ptlrpc_request, lustre_msg* */
  54 #include <lustre_req_layout.h>
  55 #include <linux/lustre_acl.h>
  56
  57 /*
  58  * empty set of fields... for suitable definition of emptiness.
  59  */
  60 static const struct req_msg_field *empty[] = {
  61         &RMF_PTLRPC_BODY
  62 };
  63
  64 static const struct req_msg_field *mgs_target_info_only[] = {
  65         &RMF_PTLRPC_BODY,
  66         &RMF_MGS_TARGET_INFO
  67 };
  68
  69 static const struct req_msg_field *mgs_set_info[] = {
  70         &RMF_PTLRPC_BODY,
  71         &RMF_MGS_SEND_PARAM
  72 };
  73
  74 static const struct req_msg_field *log_cancel_client[] = {
  75         &RMF_PTLRPC_BODY,
  76         &RMF_LOGCOOKIES
  77 };
  78
  79 static const struct req_msg_field *mdt_body_only[] = {
  80         &RMF_PTLRPC_BODY,
  81         &RMF_MDT_BODY
  82 };
  83
  84 static const struct req_msg_field *mdt_body_capa[] = {
  85         &RMF_PTLRPC_BODY,
  86         &RMF_MDT_BODY,
  87         &RMF_CAPA1
  88 };
  89
  90 static const struct req_msg_field *quotactl_only[] = {
  91         &RMF_PTLRPC_BODY,
  92         &RMF_OBD_QUOTACTL
  93 };
  94
  95 static const struct req_msg_field *qunit_data_only[] = {
  96         &RMF_PTLRPC_BODY,
  97         &RMF_QUNIT_DATA
  98 };
  99
 100 static const struct req_msg_field *mdt_close_client[] = {
 101         &RMF_PTLRPC_BODY,
 102         &RMF_MDT_EPOCH,
 103         &RMF_REC_REINT,
 104         &RMF_CAPA1
 105 };
 106
 107 static const struct req_msg_field *obd_statfs_server[] = {
 108         &RMF_PTLRPC_BODY,
 109         &RMF_OBD_STATFS
 110 };
 111
 112 static const struct req_msg_field *seq_query_client[] = {
 113         &RMF_PTLRPC_BODY,
 114         &RMF_SEQ_OPC,
 115         &RMF_SEQ_RANGE
 116 };
 117
 118 static const struct req_msg_field *seq_query_server[] = {
 119         &RMF_PTLRPC_BODY,
 120         &RMF_SEQ_RANGE
 121 };
 122
 123 static const struct req_msg_field *fld_query_client[] = {
 124         &RMF_PTLRPC_BODY,
 125         &RMF_FLD_OPC,
 126         &RMF_FLD_MDFLD
 127 };
 128
 129 static const struct req_msg_field *fld_query_server[] = {
 130         &RMF_PTLRPC_BODY,
 131         &RMF_FLD_MDFLD
 132 };
 133
 134 static const struct req_msg_field *mds_getattr_name_client[] = {
 135         &RMF_PTLRPC_BODY,
 136         &RMF_MDT_BODY,
 137         &RMF_CAPA1,
 138         &RMF_NAME
 139 };
 140
 141 static const struct req_msg_field *mds_reint_client[] = {
 142         &RMF_PTLRPC_BODY,
 143         &RMF_REC_REINT
 144 };
 145
 146 static const struct req_msg_field *mds_reint_create_client[] = {
 147         &RMF_PTLRPC_BODY,
 148         &RMF_REC_REINT,
 149         &RMF_CAPA1,
 150         &RMF_NAME
 151 };
 152
 153 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 154         &RMF_PTLRPC_BODY,
 155         &RMF_REC_REINT,
 156         &RMF_CAPA1,
 157         &RMF_NAME,
 158         &RMF_EADATA,
 159         &RMF_DLM_REQ
 160 };
 161
 162 static const struct req_msg_field *mds_reint_create_rmt_acl_client[] = {
 163         &RMF_PTLRPC_BODY,
 164         &RMF_REC_REINT,
 165         &RMF_CAPA1,
 166         &RMF_NAME,
 167         &RMF_EADATA,
 168         &RMF_DLM_REQ
 169 };
 170
 171 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 172         &RMF_PTLRPC_BODY,
 173         &RMF_REC_REINT,
 174         &RMF_CAPA1,
 175         &RMF_NAME,
 176         &RMF_SYMTGT,
 177         &RMF_DLM_REQ
 178 };
 179
 180 static const struct req_msg_field *mds_reint_open_client[] = {
 181         &RMF_PTLRPC_BODY,
 182         &RMF_REC_REINT,
 183         &RMF_CAPA1,
 184         &RMF_CAPA2,
 185         &RMF_NAME,
 186         &RMF_EADATA
 187 };
 188
 189 static const struct req_msg_field *mds_reint_open_server[] = {
 190         &RMF_PTLRPC_BODY,
 191         &RMF_MDT_BODY,
 192         &RMF_MDT_MD,
 193         &RMF_ACL,
 194         &RMF_CAPA1,
 195         &RMF_CAPA2
 196 };
 197
 198 static const struct req_msg_field *mds_reint_unlink_client[] = {
 199         &RMF_PTLRPC_BODY,
 200         &RMF_REC_REINT,
 201         &RMF_CAPA1,
 202         &RMF_NAME,
 203         &RMF_DLM_REQ
 204 };
 205
 206 static const struct req_msg_field *mds_reint_link_client[] = {
 207         &RMF_PTLRPC_BODY,
 208         &RMF_REC_REINT,
 209         &RMF_CAPA1,
 210         &RMF_CAPA2,
 211         &RMF_NAME,
 212         &RMF_DLM_REQ
 213 };
 214
 215 static const struct req_msg_field *mds_reint_rename_client[] = {
 216         &RMF_PTLRPC_BODY,
 217         &RMF_REC_REINT,
 218         &RMF_CAPA1,
 219         &RMF_CAPA2,
 220         &RMF_NAME,
 221         &RMF_SYMTGT,
 222         &RMF_DLM_REQ
 223 };
 224
 225 static const struct req_msg_field *mds_last_unlink_server[] = {
 226         &RMF_PTLRPC_BODY,
 227         &RMF_MDT_BODY,
 228         &RMF_MDT_MD,
 229         &RMF_LOGCOOKIES
 230 };
 231
 232 static const struct req_msg_field *mds_reint_setattr_client[] = {
 233         &RMF_PTLRPC_BODY,
 234         &RMF_REC_REINT,
 235         &RMF_CAPA1,
 236         &RMF_MDT_EPOCH,
 237         &RMF_EADATA,
 238         &RMF_LOGCOOKIES,
 239         &RMF_DLM_REQ
 240 };
 241
 242 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 243         &RMF_PTLRPC_BODY,
 244         &RMF_REC_REINT,
 245         &RMF_CAPA1,
 246         &RMF_NAME,
 247         &RMF_EADATA
 248 };
 249
 250 static const struct req_msg_field *obd_connect_client[] = {
 251         &RMF_PTLRPC_BODY,
 252         &RMF_TGTUUID,
 253         &RMF_CLUUID,
 254         &RMF_CONN,
 255         &RMF_CONNECT_DATA
 256 };
 257
 258 static const struct req_msg_field *obd_connect_server[] = {
 259         &RMF_PTLRPC_BODY,
 260         &RMF_CONNECT_DATA
 261 };
 262
 263 static const struct req_msg_field *mds_set_info_client[] = {
 264         &RMF_PTLRPC_BODY,
 265         &RMF_SETINFO_KEY,
 266         &RMF_SETINFO_VAL
 267 };
 268
 269 static const struct req_msg_field *ldlm_enqueue_client[] = {
 270         &RMF_PTLRPC_BODY,
 271         &RMF_DLM_REQ
 272 };
 273
 274 static const struct req_msg_field *ldlm_enqueue_server[] = {
 275         &RMF_PTLRPC_BODY,
 276         &RMF_DLM_REP
 277 };
 278
 279 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 280         &RMF_PTLRPC_BODY,
 281         &RMF_DLM_REP,
 282         &RMF_DLM_LVB
 283 };
 284
 285 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 286         &RMF_PTLRPC_BODY,
 287         &RMF_DLM_REQ,
 288         &RMF_DLM_LVB
 289 };
 290
 291 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 292         &RMF_PTLRPC_BODY,
 293         &RMF_DLM_LVB
 294 };
 295
 296 static const struct req_msg_field *ldlm_intent_client[] = {
 297         &RMF_PTLRPC_BODY,
 298         &RMF_DLM_REQ,
 299         &RMF_LDLM_INTENT,
 300         &RMF_REC_REINT
 301 };
 302
 303 static const struct req_msg_field *ldlm_intent_server[] = {
 304         &RMF_PTLRPC_BODY,
 305         &RMF_DLM_REP,
 306         &RMF_MDT_BODY,
 307         &RMF_MDT_MD,
 308         &RMF_ACL
 309 };
 310
 311 static const struct req_msg_field *ldlm_intent_open_server[] = {
 312         &RMF_PTLRPC_BODY,
 313         &RMF_DLM_REP,
 314         &RMF_MDT_BODY,
 315         &RMF_MDT_MD,
 316         &RMF_ACL,
 317         &RMF_CAPA1,
 318         &RMF_CAPA2
 319 };
 320
 321 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 322         &RMF_PTLRPC_BODY,
 323         &RMF_DLM_REQ,
 324         &RMF_LDLM_INTENT,
 325         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 326         &RMF_CAPA1,
 327         &RMF_NAME
 328 };
 329
 330 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 331         &RMF_PTLRPC_BODY,
 332         &RMF_DLM_REP,
 333         &RMF_MDT_BODY,
 334         &RMF_MDT_MD,
 335         &RMF_ACL,
 336         &RMF_CAPA1
 337 };
 338
 339 static const struct req_msg_field *ldlm_intent_create_client[] = {
 340         &RMF_PTLRPC_BODY,
 341         &RMF_DLM_REQ,
 342         &RMF_LDLM_INTENT,
 343         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 344         &RMF_CAPA1,
 345         &RMF_NAME,
 346         &RMF_EADATA
 347 };
 348
 349 static const struct req_msg_field *ldlm_intent_open_client[] = {
 350         &RMF_PTLRPC_BODY,
 351         &RMF_DLM_REQ,
 352         &RMF_LDLM_INTENT,
 353         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 354         &RMF_CAPA1,
 355         &RMF_CAPA2,
 356         &RMF_NAME,
 357         &RMF_EADATA,
 358         &RMF_REC_JOINFILE
 359 };
 360
 361 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 362         &RMF_PTLRPC_BODY,
 363         &RMF_DLM_REQ,
 364         &RMF_LDLM_INTENT,
 365         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 366         &RMF_CAPA1,
 367         &RMF_NAME
 368 };
 369
 370 static const struct req_msg_field *mds_getxattr_client[] = {
 371         &RMF_PTLRPC_BODY,
 372         &RMF_MDT_BODY,
 373         &RMF_CAPA1,
 374         &RMF_NAME,
 375         &RMF_EADATA
 376 };
 377
 378 static const struct req_msg_field *mds_getxattr_server[] = {
 379         &RMF_PTLRPC_BODY,
 380         &RMF_MDT_BODY,
 381         &RMF_EADATA
 382 };
 383
 384 static const struct req_msg_field *mds_getattr_server[] = {
 385         &RMF_PTLRPC_BODY,
 386         &RMF_MDT_BODY,
 387         &RMF_MDT_MD,
 388         &RMF_ACL,
 389         &RMF_CAPA1,
 390         &RMF_CAPA2
 391 };
 392
 393 static const struct req_msg_field *mds_setattr_server[] = {
 394         &RMF_PTLRPC_BODY,
 395         &RMF_MDT_BODY,
 396         &RMF_MDT_MD,
 397         &RMF_ACL,
 398         &RMF_CAPA1,
 399         &RMF_CAPA2
 400 };
 401
 402 static const struct req_msg_field *llog_catinfo_client[] = {
 403         &RMF_PTLRPC_BODY,
 404         &RMF_NAME,
 405         &RMF_STRING
 406 };
 407
 408 static const struct req_msg_field *llog_catinfo_server[] = {
 409         &RMF_PTLRPC_BODY,
 410         &RMF_STRING
 411 };
 412
 413 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 414         &RMF_PTLRPC_BODY,
 415         &RMF_LLOGD_BODY,
 416         &RMF_NAME
 417 };
 418
 419 static const struct req_msg_field *llogd_body_only[] = {
 420         &RMF_PTLRPC_BODY,
 421         &RMF_LLOGD_BODY
 422 };
 423
 424 static const struct req_msg_field *llog_log_hdr_only[] = {
 425         &RMF_PTLRPC_BODY,
 426         &RMF_LLOG_LOG_HDR
 427 };
 428
 429 static const struct req_msg_field *llogd_conn_body_only[] = {
 430         &RMF_PTLRPC_BODY,
 431         &RMF_LLOGD_CONN_BODY
 432 };
 433
 434 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 435         &RMF_PTLRPC_BODY,
 436         &RMF_LLOGD_BODY,
 437         &RMF_EADATA
 438 };
 439
 440 static const struct req_msg_field *ost_body_only[] = {
 441         &RMF_PTLRPC_BODY,
 442         &RMF_OST_BODY
 443 };
 444
 445 static const struct req_msg_field *ost_body_capa[] = {
 446         &RMF_PTLRPC_BODY,
 447         &RMF_OST_BODY,
 448         &RMF_CAPA1
 449 };
 450
 451 static const struct req_msg_field *ost_destroy_client[] = {
 452         &RMF_PTLRPC_BODY,
 453         &RMF_OST_BODY,
 454         &RMF_DLM_REQ
 455 };
 456
 457
 458 static const struct req_msg_field *ost_brw_client[] = {
 459         &RMF_PTLRPC_BODY,
 460         &RMF_OST_BODY,
 461         &RMF_OBD_IOOBJ,
 462         &RMF_NIOBUF_REMOTE,
 463         &RMF_CAPA1
 464 };
 465
 466 static const struct req_msg_field *ost_brw_server[] = {
 467         &RMF_PTLRPC_BODY,
 468         &RMF_OST_BODY,
 469         &RMF_NIOBUF_REMOTE
 470 };
 471
 472 static const struct req_msg_field *ost_set_info_client[] = {
 473         &RMF_PTLRPC_BODY,
 474         &RMF_SETINFO_KEY,
 475         &RMF_SETINFO_VAL
 476 };
 477
 478 static const struct req_msg_field *ost_get_info_generic_server[] = {
 479         &RMF_PTLRPC_BODY,
 480         &RMF_GENERIC_DATA,
 481 };
 482
 483 static const struct req_msg_field *ost_get_info_generic_client[] = {
 484         &RMF_PTLRPC_BODY,
 485         &RMF_SETINFO_KEY
 486 };
 487
 488 static const struct req_msg_field *ost_get_last_id_server[] = {
 489         &RMF_PTLRPC_BODY,
 490         &RMF_OBD_ID
 491 };
 492
 493 static const struct req_format *req_formats[] = {
 494         &RQF_OBD_PING,
 495         &RQF_SEC_CTX,
 496         &RQF_SEQ_QUERY,
 497         &RQF_FLD_QUERY,
 498         &RQF_MGS_TARGET_REG,
 499         &RQF_MGS_SET_INFO,
 500         &RQF_MDS_CONNECT,
 501         &RQF_MDS_DISCONNECT,
 502         &RQF_MDS_SET_INFO,
 503         &RQF_MDS_GETSTATUS,
 504         &RQF_MDS_STATFS,
 505         &RQF_MDS_GETATTR,
 506         &RQF_MDS_GETATTR_NAME,
 507         &RQF_MDS_GETXATTR,
 508         &RQF_MDS_SYNC,
 509         &RQF_MDS_CLOSE,
 510         &RQF_MDS_PIN,
 511         &RQF_MDS_UNPIN,
 512         &RQF_MDS_READPAGE,
 513         &RQF_MDS_WRITEPAGE,
 514         &RQF_MDS_IS_SUBDIR,
 515         &RQF_MDS_DONE_WRITING,
 516         &RQF_MDS_REINT,
 517         &RQF_MDS_REINT_CREATE,
 518         &RQF_MDS_REINT_CREATE_RMT_ACL,
 519         &RQF_MDS_REINT_CREATE_SLAVE,
 520         &RQF_MDS_REINT_CREATE_SYM,
 521         &RQF_MDS_REINT_OPEN,
 522         &RQF_MDS_REINT_UNLINK,
 523         &RQF_MDS_REINT_LINK,
 524         &RQF_MDS_REINT_RENAME,
 525         &RQF_MDS_REINT_SETATTR,
 526         &RQF_MDS_REINT_SETXATTR,
 527         &RQF_MDS_QUOTACHECK,
 528         &RQF_MDS_QUOTACTL,
 529         &RQF_MDS_QUOTA_DQACQ,
 530         &RQF_OST_CONNECT,
 531         &RQF_OST_DISCONNECT,
 532         &RQF_OST_QUOTACHECK,
 533         &RQF_OST_QUOTACTL,
 534         &RQF_OST_GETATTR,
 535         &RQF_OST_SETATTR,
 536         &RQF_OST_CREATE,
 537         &RQF_OST_PUNCH,
 538         &RQF_OST_SYNC,
 539         &RQF_OST_DESTROY,
 540         &RQF_OST_BRW,
 541         &RQF_OST_STATFS,
 542         &RQF_OST_SET_INFO,
 543         &RQF_OST_GET_INFO_GENERIC,
 544         &RQF_OST_GET_INFO_LAST_ID,
 545         &RQF_LDLM_ENQUEUE,
 546         &RQF_LDLM_ENQUEUE_LVB,
 547         &RQF_LDLM_CONVERT,
 548         &RQF_LDLM_CANCEL,
 549         &RQF_LDLM_CALLBACK,
 550         &RQF_LDLM_CP_CALLBACK,
 551         &RQF_LDLM_BL_CALLBACK,
 552         &RQF_LDLM_GL_CALLBACK,
 553         &RQF_LDLM_INTENT,
 554         &RQF_LDLM_INTENT_GETATTR,
 555         &RQF_LDLM_INTENT_OPEN,
 556         &RQF_LDLM_INTENT_CREATE,
 557         &RQF_LDLM_INTENT_UNLINK,
 558         &RQF_LOG_CANCEL,
 559         &RQF_LLOG_CATINFO,
 560         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 561         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 562         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 563         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 564         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 565         &RQF_LLOG_ORIGIN_CONNECT
 566 };
 567
 568 struct req_msg_field {
 569         __u32       rmf_flags;
 570         const char *rmf_name;
 571         /*
 572          * Field length. (-1) means "variable length".
 573          */
 574         int         rmf_size;
 575         void      (*rmf_swabber)(void *);
 576         int         rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 577 };
 578
 579 enum rmf_flags {
 580         RMF_F_STRING = 1 << 0
 581 };
 582
 583 struct req_capsule;
 584
 585 /*
 586  * Request fields.
 587  */
 588 #define DEFINE_MSGF(name, flags, size, swabber) {       \
 589         .rmf_name    = (name),                          \
 590         .rmf_flags   = (flags),                         \
 591         .rmf_size    = (size),                          \
 592         .rmf_swabber = (void (*)(void*))(swabber)       \
 593 }
 594
 595 const struct req_msg_field RMF_GENERIC_DATA =
 596         DEFINE_MSGF("generic_data", 0,
 597                     -1, NULL);
 598 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 599
 600 const struct req_msg_field RMF_MGS_TARGET_INFO =
 601         DEFINE_MSGF("mgs_target_info", 0,
 602                     sizeof(struct mgs_target_info),
 603                     lustre_swab_mgs_target_info);
 604 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 605
 606 const struct req_msg_field RMF_MGS_SEND_PARAM =
 607         DEFINE_MSGF("mgs_send_param", 0,
 608                     sizeof(struct mgs_send_param),
 609                     NULL);
 610 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 611
 612 const struct req_msg_field RMF_SETINFO_VAL =
 613         DEFINE_MSGF("setinfo_val", 0,
 614                     sizeof(__u32), lustre_swab_generic_32s);
 615 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 616
 617 const struct req_msg_field RMF_SEQ_OPC =
 618         DEFINE_MSGF("seq_query_opc", 0,
 619                     sizeof(__u32), lustre_swab_generic_32s);
 620 EXPORT_SYMBOL(RMF_SEQ_OPC);
 621
 622 const struct req_msg_field RMF_SEQ_RANGE =
 623         DEFINE_MSGF("seq_query_range", 0,
 624                     sizeof(struct lu_range), lustre_swab_lu_range);
 625 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 626
 627 const struct req_msg_field RMF_FLD_OPC =
 628         DEFINE_MSGF("fld_query_opc", 0,
 629                     sizeof(__u32), lustre_swab_generic_32s);
 630 EXPORT_SYMBOL(RMF_FLD_OPC);
 631
 632 const struct req_msg_field RMF_FLD_MDFLD =
 633         DEFINE_MSGF("fld_query_mdfld", 0,
 634                     sizeof(struct md_fld), lustre_swab_md_fld);
 635 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 636
 637 const struct req_msg_field RMF_MDT_BODY =
 638         DEFINE_MSGF("mdt_body", 0,
 639                     sizeof(struct mdt_body), lustre_swab_mdt_body);
 640 EXPORT_SYMBOL(RMF_MDT_BODY);
 641
 642 const struct req_msg_field RMF_OBD_QUOTACTL =
 643         DEFINE_MSGF("obd_quotactl", 0,
 644                     sizeof(struct obd_quotactl), lustre_swab_obd_quotactl);
 645 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 646
 647 const struct req_msg_field RMF_QUNIT_DATA =
 648         DEFINE_MSGF("qunit_data", 0,
 649                     sizeof(struct qunit_data), NULL);
 650 EXPORT_SYMBOL(RMF_QUNIT_DATA);
 651
 652 const struct req_msg_field RMF_MDT_EPOCH =
 653         DEFINE_MSGF("mdt_epoch", 0,
 654                     sizeof(struct mdt_epoch), lustre_swab_mdt_epoch);
 655 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 656
 657 const struct req_msg_field RMF_PTLRPC_BODY =
 658         DEFINE_MSGF("ptlrpc_body", 0,
 659                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body);
 660 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 661
 662 const struct req_msg_field RMF_OBD_STATFS =
 663         DEFINE_MSGF("obd_statfs", 0,
 664                     sizeof(struct obd_statfs), lustre_swab_obd_statfs);
 665 EXPORT_SYMBOL(RMF_OBD_STATFS);
 666
 667 const struct req_msg_field RMF_SETINFO_KEY =
 668         DEFINE_MSGF("setinfo_key", 0, -1, NULL);
 669 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 670
 671 const struct req_msg_field RMF_NAME =
 672         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL);
 673 EXPORT_SYMBOL(RMF_NAME);
 674
 675 const struct req_msg_field RMF_SYMTGT =
 676         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL);
 677 EXPORT_SYMBOL(RMF_SYMTGT);
 678
 679 const struct req_msg_field RMF_TGTUUID =
 680         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 681 EXPORT_SYMBOL(RMF_TGTUUID);
 682
 683 const struct req_msg_field RMF_CLUUID =
 684         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL);
 685 EXPORT_SYMBOL(RMF_CLUUID);
 686
 687 const struct req_msg_field RMF_STRING =
 688         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL);
 689 EXPORT_SYMBOL(RMF_STRING);
 690
 691 const struct req_msg_field RMF_LLOGD_BODY =
 692         DEFINE_MSGF("llogd_body", 0,
 693                     sizeof(struct llogd_body), lustre_swab_llogd_body);
 694 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 695
 696 const struct req_msg_field RMF_LLOG_LOG_HDR =
 697         DEFINE_MSGF("llog_log_hdr", 0,
 698                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr);
 699 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 700
 701 const struct req_msg_field RMF_LLOGD_CONN_BODY =
 702         DEFINE_MSGF("llogd_conn_body", 0,
 703                     sizeof(struct llogd_conn_body),
 704                     lustre_swab_llogd_conn_body);
 705 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 706
 707 /*
 708  * connection handle received in MDS_CONNECT request.
 709  *
 710  * XXX no swabbing?
 711  */
 712 const struct req_msg_field RMF_CONN =
 713         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL);
 714 EXPORT_SYMBOL(RMF_CONN);
 715
 716 const struct req_msg_field RMF_CONNECT_DATA =
 717         DEFINE_MSGF("cdata", 0,
 718                     sizeof(struct obd_connect_data), lustre_swab_connect);
 719 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 720
 721 const struct req_msg_field RMF_DLM_REQ =
 722         DEFINE_MSGF("dlm_req", 0,
 723                     sizeof(struct ldlm_request), lustre_swab_ldlm_request);
 724 EXPORT_SYMBOL(RMF_DLM_REQ);
 725
 726 const struct req_msg_field RMF_DLM_REP =
 727         DEFINE_MSGF("dlm_rep", 0,
 728                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply);
 729 EXPORT_SYMBOL(RMF_DLM_REP);
 730
 731 const struct req_msg_field RMF_LDLM_INTENT =
 732         DEFINE_MSGF("ldlm_intent", 0,
 733                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent);
 734 EXPORT_SYMBOL(RMF_LDLM_INTENT);
 735
 736 const struct req_msg_field RMF_DLM_LVB =
 737         DEFINE_MSGF("dlm_lvb", 0, sizeof(struct ost_lvb), NULL);
 738 EXPORT_SYMBOL(RMF_DLM_LVB);
 739
 740 const struct req_msg_field RMF_MDT_MD =
 741         DEFINE_MSGF("mdt_md", 0, MIN_MD_SIZE, NULL);
 742 EXPORT_SYMBOL(RMF_MDT_MD);
 743
 744 const struct req_msg_field RMF_REC_REINT =
 745         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
 746                     lustre_swab_mdt_rec_reint);
 747 EXPORT_SYMBOL(RMF_REC_REINT);
 748
 749 const struct req_msg_field RMF_REC_JOINFILE =
 750         DEFINE_MSGF("rec_joinfile", 0, sizeof(struct mdt_rec_join),
 751                     lustre_swab_mdt_rec_join);
 752 EXPORT_SYMBOL(RMF_REC_JOINFILE);
 753
 754 /* FIXME: this length should be defined as a macro */
 755 const struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1, NULL);
 756 EXPORT_SYMBOL(RMF_EADATA);
 757
 758 const struct req_msg_field RMF_ACL =
 759         DEFINE_MSGF("acl", 0, LUSTRE_POSIX_ACL_MAX_SIZE, NULL);
 760 EXPORT_SYMBOL(RMF_ACL);
 761
 762 const struct req_msg_field RMF_LOGCOOKIES =
 763         DEFINE_MSGF("logcookies", 0, sizeof(struct llog_cookie), NULL);
 764 EXPORT_SYMBOL(RMF_LOGCOOKIES);
 765
 766 const struct req_msg_field RMF_CAPA1 =
 767         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 768                     lustre_swab_lustre_capa);
 769 EXPORT_SYMBOL(RMF_CAPA1);
 770
 771 const struct req_msg_field RMF_CAPA2 =
 772         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
 773                     lustre_swab_lustre_capa);
 774 EXPORT_SYMBOL(RMF_CAPA2);
 775
 776 /*
 777  * OST request field.
 778  */
 779 const struct req_msg_field RMF_OST_BODY =
 780         DEFINE_MSGF("ost_body", 0,
 781                     sizeof(struct ost_body), lustre_swab_ost_body);
 782 EXPORT_SYMBOL(RMF_OST_BODY);
 783
 784 const struct req_msg_field RMF_OBD_IOOBJ =
 785         DEFINE_MSGF("obd_ioobj", 0,
 786                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj);
 787 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
 788
 789 const struct req_msg_field RMF_NIOBUF_REMOTE =
 790         DEFINE_MSGF("niobuf_remote", 0, -1, lustre_swab_niobuf_remote);
 791 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
 792
 793 const struct req_msg_field RMF_OBD_ID =
 794         DEFINE_MSGF("obd_id", 0,
 795                     sizeof(obd_id), lustre_swab_ost_last_id);
 796 EXPORT_SYMBOL(RMF_OBD_ID);
 797
 798
 799 /*
 800  * Request formats.
 801  */
 802
 803 struct req_format {
 804         const char *rf_name;
 805         int         rf_idx;
 806         struct {
 807                 int                          nr;
 808                 const struct req_msg_field **d;
 809         } rf_fields[RCL_NR];
 810 };
 811
 812 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
 813         .rf_name   = name,                                              \
 814         .rf_fields = {                                                  \
 815                 [RCL_CLIENT] = {                                        \
 816                         .nr = client_nr,                                \
 817                         .d  = client                                    \
 818                 },                                                      \
 819                 [RCL_SERVER] = {                                        \
 820                         .nr = server_nr,                                \
 821                         .d  = server                                    \
 822                 }                                                       \
 823         }                                                               \
 824 }
 825
 826 #define DEFINE_REQ_FMT0(name, client, server)                                  \
 827 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
 828
 829 const struct req_format RQF_OBD_PING =
 830         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
 831 EXPORT_SYMBOL(RQF_OBD_PING);
 832
 833 const struct req_format RQF_SEC_CTX =
 834         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
 835 EXPORT_SYMBOL(RQF_SEC_CTX);
 836
 837 const struct req_format RQF_MGS_TARGET_REG =
 838         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
 839                          mgs_target_info_only);
 840 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
 841
 842 const struct req_format RQF_MGS_SET_INFO =
 843         DEFINE_REQ_FMT0("MGS_SET_INTO", mgs_set_info,
 844                          mgs_set_info);
 845 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
 846
 847 const struct req_format RQF_LOG_CANCEL =
 848         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
 849 EXPORT_SYMBOL(RQF_LOG_CANCEL);
 850
 851 const struct req_format RQF_MDS_QUOTACHECK =
 852         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
 853 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
 854
 855 const struct req_format RQF_OST_QUOTACHECK =
 856         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
 857 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
 858
 859 const struct req_format RQF_MDS_QUOTACTL =
 860         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
 861 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
 862
 863 const struct req_format RQF_OST_QUOTACTL =
 864         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
 865 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
 866
 867 const struct req_format RQF_QC_CALLBACK =
 868         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
 869 EXPORT_SYMBOL(RQF_QC_CALLBACK);
 870
 871 const struct req_format RQF_MDS_QUOTA_DQACQ =
 872         DEFINE_REQ_FMT0("MDS_QUOTA_DQACQ", qunit_data_only, qunit_data_only);
 873 EXPORT_SYMBOL(RQF_MDS_QUOTA_DQACQ);
 874
 875 const struct req_format RQF_SEQ_QUERY =
 876         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
 877 EXPORT_SYMBOL(RQF_SEQ_QUERY);
 878
 879 const struct req_format RQF_FLD_QUERY =
 880         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
 881 EXPORT_SYMBOL(RQF_FLD_QUERY);
 882
 883 const struct req_format RQF_MDS_GETSTATUS =
 884         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
 885 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
 886
 887 const struct req_format RQF_MDS_STATFS =
 888         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
 889 EXPORT_SYMBOL(RQF_MDS_STATFS);
 890
 891 const struct req_format RQF_MDS_SYNC =
 892         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
 893 EXPORT_SYMBOL(RQF_MDS_SYNC);
 894
 895 const struct req_format RQF_MDS_GETATTR =
 896         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
 897 EXPORT_SYMBOL(RQF_MDS_GETATTR);
 898
 899 const struct req_format RQF_MDS_GETXATTR =
 900         DEFINE_REQ_FMT0("MDS_GETXATTR",
 901                         mds_getxattr_client, mds_getxattr_server);
 902 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
 903
 904 const struct req_format RQF_MDS_GETATTR_NAME =
 905         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
 906                         mds_getattr_name_client, mds_getattr_server);
 907 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
 908
 909 const struct req_format RQF_MDS_REINT =
 910         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
 911 EXPORT_SYMBOL(RQF_MDS_REINT);
 912
 913 const struct req_format RQF_MDS_REINT_CREATE =
 914         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
 915                         mds_reint_create_client, mdt_body_capa);
 916 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
 917
 918 const struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
 919         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
 920                         mds_reint_create_rmt_acl_client, mdt_body_capa);
 921 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
 922
 923 const struct req_format RQF_MDS_REINT_CREATE_SLAVE =
 924         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
 925                         mds_reint_create_slave_client, mdt_body_capa);
 926 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
 927
 928 const struct req_format RQF_MDS_REINT_CREATE_SYM =
 929         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
 930                         mds_reint_create_sym_client, mdt_body_capa);
 931 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
 932
 933 const struct req_format RQF_MDS_REINT_OPEN =
 934         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
 935                         mds_reint_open_client, mds_reint_open_server);
 936 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
 937
 938 const struct req_format RQF_MDS_REINT_UNLINK =
 939         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
 940                         mds_last_unlink_server);
 941 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
 942
 943 const struct req_format RQF_MDS_REINT_LINK =
 944         DEFINE_REQ_FMT0("MDS_REINT_LINK",
 945                         mds_reint_link_client, mdt_body_only);
 946 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
 947
 948 const struct req_format RQF_MDS_REINT_RENAME =
 949         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
 950                         mds_last_unlink_server);
 951 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
 952
 953 const struct req_format RQF_MDS_REINT_SETATTR =
 954         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
 955                         mds_reint_setattr_client, mds_setattr_server);
 956 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
 957
 958 const struct req_format RQF_MDS_REINT_SETXATTR =
 959         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
 960                         mds_reint_setxattr_client, mdt_body_only);
 961 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
 962
 963 const struct req_format RQF_MDS_CONNECT =
 964         DEFINE_REQ_FMT0("MDS_CONNECT",
 965                         obd_connect_client, obd_connect_server);
 966 EXPORT_SYMBOL(RQF_MDS_CONNECT);
 967
 968 const struct req_format RQF_MDS_DISCONNECT =
 969         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
 970 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
 971
 972 const struct req_format RQF_MDS_SET_INFO =
 973         DEFINE_REQ_FMT0("MDS_SET_INFO", mds_set_info_client, empty);
 974 EXPORT_SYMBOL(RQF_MDS_SET_INFO);
 975
 976 const struct req_format RQF_LDLM_ENQUEUE =
 977         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
 978                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
 979 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
 980
 981 const struct req_format RQF_LDLM_ENQUEUE_LVB =
 982         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
 983                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
 984 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
 985
 986 const struct req_format RQF_LDLM_CONVERT =
 987         DEFINE_REQ_FMT0("LDLM_CONVERT",
 988                         ldlm_enqueue_client, ldlm_enqueue_server);
 989 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
 990
 991 const struct req_format RQF_LDLM_CANCEL =
 992         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
 993 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
 994
 995 const struct req_format RQF_LDLM_CALLBACK =
 996         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
 997 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
 998
 999 const struct req_format RQF_LDLM_CP_CALLBACK =
1000         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1001 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1002
1003 const struct req_format RQF_LDLM_BL_CALLBACK =
1004         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1005 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1006
1007 const struct req_format RQF_LDLM_GL_CALLBACK =
1008         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1009                         ldlm_gl_callback_server);
1010 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1011
1012 const struct req_format RQF_LDLM_INTENT =
1013         DEFINE_REQ_FMT0("LDLM_INTENT",
1014                         ldlm_intent_client, ldlm_intent_server);
1015 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1016
1017 const struct req_format RQF_LDLM_INTENT_GETATTR =
1018         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1019                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1020 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1021
1022 const struct req_format RQF_LDLM_INTENT_OPEN =
1023         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1024                         ldlm_intent_open_client, ldlm_intent_open_server);
1025 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1026
1027 const struct req_format RQF_LDLM_INTENT_CREATE =
1028         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1029                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1030 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1031
1032 const struct req_format RQF_LDLM_INTENT_UNLINK =
1033         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1034                         ldlm_intent_unlink_client, ldlm_intent_server);
1035 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1036
1037 const struct req_format RQF_MDS_CLOSE =
1038         DEFINE_REQ_FMT0("MDS_CLOSE",
1039                         mdt_close_client, mds_last_unlink_server);
1040 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1041
1042 const struct req_format RQF_MDS_PIN =
1043         DEFINE_REQ_FMT0("MDS_PIN",
1044                         mdt_body_capa, mdt_body_only);
1045 EXPORT_SYMBOL(RQF_MDS_PIN);
1046
1047 const struct req_format RQF_MDS_UNPIN =
1048         DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1049 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1050
1051 const struct req_format RQF_MDS_DONE_WRITING =
1052         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1053                         mdt_close_client, mdt_body_only);
1054 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1055
1056 const struct req_format RQF_MDS_READPAGE =
1057         DEFINE_REQ_FMT0("MDS_READPAGE",
1058                         mdt_body_capa, mdt_body_only);
1059 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1060
1061 /* This is for split */
1062 const struct req_format RQF_MDS_WRITEPAGE =
1063         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1064                         mdt_body_capa, mdt_body_only);
1065 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1066
1067 const struct req_format RQF_MDS_IS_SUBDIR =
1068         DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1069                         mdt_body_only, mdt_body_only);
1070 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1071
1072 const struct req_format RQF_LLOG_CATINFO =
1073         DEFINE_REQ_FMT0("LLOG_CATINFO",
1074                         llog_catinfo_client, llog_catinfo_server);
1075 EXPORT_SYMBOL(RQF_LLOG_CATINFO);
1076
1077 const struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1078         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1079                         llog_origin_handle_create_client, llogd_body_only);
1080 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1081
1082 const struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1083         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1084                         llogd_body_only, llogd_body_only);
1085 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1086
1087 const struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1088         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1089                         llogd_body_only, llog_origin_handle_next_block_server);
1090 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1091
1092 const struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1093         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1094                         llogd_body_only, llog_origin_handle_next_block_server);
1095 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1096
1097 const struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1098         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1099                         llogd_body_only, llog_log_hdr_only);
1100 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1101
1102 const struct req_format RQF_LLOG_ORIGIN_CONNECT =
1103         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1104 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1105
1106 const struct req_format RQF_OST_CONNECT =
1107         DEFINE_REQ_FMT0("OST_CONNECT",
1108                         obd_connect_client, obd_connect_server);
1109 EXPORT_SYMBOL(RQF_OST_CONNECT);
1110
1111 const struct req_format RQF_OST_DISCONNECT =
1112         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1113 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1114
1115 const struct req_format RQF_OST_GETATTR =
1116         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1117 EXPORT_SYMBOL(RQF_OST_GETATTR);
1118
1119 const struct req_format RQF_OST_SETATTR =
1120         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1121 EXPORT_SYMBOL(RQF_OST_SETATTR);
1122
1123 const struct req_format RQF_OST_CREATE =
1124         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1125 EXPORT_SYMBOL(RQF_OST_CREATE);
1126
1127 const struct req_format RQF_OST_PUNCH =
1128         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1129 EXPORT_SYMBOL(RQF_OST_PUNCH);
1130
1131 const struct req_format RQF_OST_SYNC =
1132         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1133 EXPORT_SYMBOL(RQF_OST_SYNC);
1134
1135 const struct req_format RQF_OST_DESTROY =
1136         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1137 EXPORT_SYMBOL(RQF_OST_DESTROY);
1138
1139 const struct req_format RQF_OST_BRW =
1140         DEFINE_REQ_FMT0("OST_BRW", ost_brw_client, ost_brw_server);
1141 EXPORT_SYMBOL(RQF_OST_BRW);
1142
1143 const struct req_format RQF_OST_STATFS =
1144         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1145 EXPORT_SYMBOL(RQF_OST_STATFS);
1146
1147 const struct req_format RQF_OST_SET_INFO =
1148         DEFINE_REQ_FMT0("OST_SET_INFO", ost_set_info_client, empty);
1149 EXPORT_SYMBOL(RQF_OST_SET_INFO);
1150
1151 const struct req_format RQF_OST_GET_INFO_GENERIC =
1152         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1153                                         ost_get_info_generic_server);
1154 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1155
1156 const struct req_format RQF_OST_GET_INFO_LAST_ID =
1157         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1158                                                 ost_get_last_id_server);
1159 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1160
1161
1162 #if !defined(__REQ_LAYOUT_USER__)
1163
1164 int req_layout_init(void)
1165 {
1166         int i;
1167         int j;
1168         int k;
1169
1170         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1171                 struct req_format *rf;
1172
1173                 rf = (struct req_format *)req_formats[i];
1174                 rf->rf_idx = i;
1175                 for (j = 0; j < RCL_NR; ++j) {
1176                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1177                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1178                                 struct req_msg_field *field;
1179
1180                                 field = (typeof(field))rf->rf_fields[j].d[k];
1181                                 LASSERT(field->rmf_offset[i][j] == 0);
1182                                 /*
1183                                  * k + 1 to detect unused format/field
1184                                  * combinations.
1185                                  */
1186                                 field->rmf_offset[i][j] = k + 1;
1187                         }
1188                 }
1189         }
1190         return 0;
1191 }
1192 EXPORT_SYMBOL(req_layout_init);
1193
1194 void req_layout_fini(void)
1195 {
1196 }
1197 EXPORT_SYMBOL(req_layout_fini);
1198
1199 void req_capsule_init_area(struct req_capsule *pill)
1200 {
1201         int i;
1202
1203         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1204                 pill->rc_area[RCL_CLIENT][i] = -1;
1205                 pill->rc_area[RCL_SERVER][i] = -1;
1206         }
1207 }
1208 EXPORT_SYMBOL(req_capsule_init_area);
1209
1210 /*
1211  * Initialize capsule.
1212  *
1213  * @area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1214  * variable-sized fields.
1215  */
1216 void req_capsule_init(struct req_capsule *pill,
1217                       struct ptlrpc_request *req,
1218                       enum req_location location)
1219 {
1220         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1221
1222         memset(pill, 0, sizeof *pill);
1223         pill->rc_req = req;
1224         pill->rc_loc = location;
1225         req_capsule_init_area(pill);
1226 }
1227 EXPORT_SYMBOL(req_capsule_init);
1228
1229 void req_capsule_fini(struct req_capsule *pill)
1230 {
1231 }
1232 EXPORT_SYMBOL(req_capsule_fini);
1233
1234 static int __req_format_is_sane(const struct req_format *fmt)
1235 {
1236         return
1237                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1238                 req_formats[fmt->rf_idx] == fmt;
1239 }
1240
1241 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1242                                     enum req_location loc)
1243 {
1244         struct ptlrpc_request *req;
1245
1246         req = pill->rc_req;
1247         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1248 }
1249
1250 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1251 {
1252         LASSERT(pill->rc_fmt == NULL);
1253         LASSERT(__req_format_is_sane(fmt));
1254
1255         pill->rc_fmt = fmt;
1256 }
1257 EXPORT_SYMBOL(req_capsule_set);
1258
1259 int req_capsule_filled_sizes(struct req_capsule *pill,
1260                            enum req_location loc)
1261 {
1262         const struct req_format *fmt = pill->rc_fmt;
1263         int                      i;
1264
1265         LASSERT(fmt != NULL);
1266
1267         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1268                 if (pill->rc_area[loc][i] == -1) {
1269                         pill->rc_area[loc][i] =
1270                                             fmt->rf_fields[loc].d[i]->rmf_size;
1271                         if (pill->rc_area[loc][i] == -1) {
1272                                 /* skip the following fields */
1273                                 LASSERT(loc != RCL_SERVER);
1274                                 break;
1275                         }
1276                 }
1277         }
1278         return i;
1279 }
1280 EXPORT_SYMBOL(req_capsule_filled_sizes);
1281
1282 int req_capsule_server_pack(struct req_capsule *pill)
1283 {
1284         const struct req_format *fmt;
1285         int                      count;
1286         int                      rc;
1287
1288         LASSERT(pill->rc_loc == RCL_SERVER);
1289         fmt = pill->rc_fmt;
1290         LASSERT(fmt != NULL);
1291
1292         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1293         rc = lustre_pack_reply(pill->rc_req, count,
1294                                pill->rc_area[RCL_SERVER], NULL);
1295         if (rc != 0) {
1296                 DEBUG_REQ(D_ERROR, pill->rc_req,
1297                           "Cannot pack %d fields in format `%s': ",
1298                           count, fmt->rf_name);
1299         }
1300         return rc;
1301 }
1302 EXPORT_SYMBOL(req_capsule_server_pack);
1303
1304 static int __req_capsule_offset(const struct req_capsule *pill,
1305                                 const struct req_msg_field *field,
1306                                 enum req_location loc)
1307 {
1308         int offset;
1309
1310         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1311         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1312                             pill->rc_fmt->rf_name,
1313                             field->rmf_name, offset, loc);
1314         offset --;
1315         LASSERT(0 <= offset && offset < (sizeof(pill->rc_swabbed) << 3));
1316         return offset;
1317 }
1318
1319 static void *__req_capsule_get(struct req_capsule *pill,
1320                                const struct req_msg_field *field,
1321                                enum req_location loc,
1322                                void (*swabber)( void *))
1323 {
1324         const struct req_format *fmt;
1325         struct lustre_msg       *msg;
1326         void                    *value;
1327         int                      len;
1328         int                      offset;
1329
1330         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1331
1332         static const char *rcl_names[RCL_NR] = {
1333                 [RCL_CLIENT] = "client",
1334                 [RCL_SERVER] = "server"
1335         };
1336
1337         fmt = pill->rc_fmt;
1338         LASSERT(fmt != NULL);
1339         LASSERT(__req_format_is_sane(fmt));
1340
1341         offset = __req_capsule_offset(pill, field, loc);
1342
1343         msg = __req_msg(pill, loc);
1344         LASSERT(msg != NULL);
1345
1346         getter = (field->rmf_flags & RMF_F_STRING) ?
1347                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1348
1349         if (pill->rc_area[loc][offset] != -1)
1350                 len = pill->rc_area[loc][offset];
1351         else
1352                 len = max(field->rmf_size, 0);
1353         value = getter(msg, offset, len);
1354
1355         swabber = swabber ?: field->rmf_swabber;
1356         if (!(pill->rc_swabbed & (1 << offset)) && loc != pill->rc_loc &&
1357             swabber != NULL && value != NULL &&
1358             lustre_msg_swabbed(msg)) {
1359                 swabber(value);
1360                 pill->rc_swabbed |= (1 << offset);
1361         }
1362         if (value == NULL) {
1363                 DEBUG_REQ(D_ERROR, pill->rc_req,
1364                           "Wrong buffer for field `%s' (%d of %d) "
1365                           "in format `%s': %d vs. %d (%s)\n",
1366                           field->rmf_name, offset, lustre_msg_bufcount(msg), fmt->rf_name,
1367                           lustre_msg_buflen(msg, offset), len,
1368                           rcl_names[loc]);
1369         }
1370
1371         return value;
1372 }
1373
1374 void *req_capsule_client_get(struct req_capsule *pill,
1375                              const struct req_msg_field *field)
1376 {
1377         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1378 }
1379 EXPORT_SYMBOL(req_capsule_client_get);
1380
1381 void *req_capsule_client_swab_get(struct req_capsule *pill,
1382                                   const struct req_msg_field *field,
1383                                   void (*swabber)(void* ))
1384 {
1385         return __req_capsule_get(pill, field, RCL_CLIENT, swabber);
1386 }
1387 EXPORT_SYMBOL(req_capsule_client_swab_get);
1388
1389 void *req_capsule_client_sized_get(struct req_capsule *pill,
1390                                    const struct req_msg_field *field,
1391                                    int len)
1392 {
1393         req_capsule_set_size(pill, field, RCL_CLIENT, len);
1394         return __req_capsule_get(pill, field, RCL_CLIENT, NULL);
1395 }
1396 EXPORT_SYMBOL(req_capsule_client_sized_get);
1397
1398 void *req_capsule_server_get(struct req_capsule *pill,
1399                              const struct req_msg_field *field)
1400 {
1401         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1402 }
1403 EXPORT_SYMBOL(req_capsule_server_get);
1404
1405 void *req_capsule_server_swab_get(struct req_capsule *pill,
1406                                   const struct req_msg_field *field,
1407                                   void *swabber)
1408 {
1409         return __req_capsule_get(pill, field, RCL_SERVER, swabber);
1410 }
1411 EXPORT_SYMBOL(req_capsule_server_swab_get);
1412
1413
1414 void *req_capsule_server_sized_get(struct req_capsule *pill,
1415                                    const struct req_msg_field *field,
1416                                    int len)
1417 {
1418         req_capsule_set_size(pill, field, RCL_SERVER, len);
1419         return __req_capsule_get(pill, field, RCL_SERVER, NULL);
1420 }
1421 EXPORT_SYMBOL(req_capsule_server_sized_get);
1422
1423 const void *req_capsule_other_get(struct req_capsule *pill,
1424                                   const struct req_msg_field *field)
1425 {
1426         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL);
1427 }
1428 EXPORT_SYMBOL(req_capsule_other_get);
1429
1430 void req_capsule_set_size(struct req_capsule *pill,
1431                           const struct req_msg_field *field,
1432                           enum req_location loc, int size)
1433 {
1434         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1435
1436         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
1437 }
1438 EXPORT_SYMBOL(req_capsule_set_size);
1439
1440 /* NB: this function doesn't correspond with req_capsule_set_size(), which
1441  * actually sets the size in pill.rc_area[loc][offset], but this function
1442  * returns the message buflen[offset], maybe we should use another name.
1443  */
1444 int req_capsule_get_size(const struct req_capsule *pill,
1445                          const struct req_msg_field *field,
1446                          enum req_location loc)
1447 {
1448         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1449
1450         return lustre_msg_buflen(__req_msg(pill, loc),
1451                                  __req_capsule_offset(pill, field, loc));
1452 }
1453 EXPORT_SYMBOL(req_capsule_get_size);
1454
1455 int req_capsule_msg_size(const struct req_capsule *pill, enum req_location loc)
1456 {
1457         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
1458                                pill->rc_fmt->rf_fields[loc].nr,
1459                                (int *)pill->rc_area[loc]);
1460 }
1461
1462 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
1463                          enum req_location loc)
1464 {
1465         int size, i = 0;
1466
1467         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
1468         if (size < 0)
1469                 return size;
1470
1471         for (; i < fmt->rf_fields[loc].nr; ++i)
1472                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
1473                         size += size_round(fmt->rf_fields[loc].d[i]->rmf_size);
1474         return size;
1475 }
1476
1477 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1478
1479 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
1480 {
1481         int i;
1482         int j;
1483
1484         const struct req_format *old;
1485
1486         LASSERT(pill->rc_fmt != NULL);
1487         LASSERT(__req_format_is_sane(fmt));
1488
1489         old = pill->rc_fmt;
1490         /*
1491          * Sanity checking...
1492          */
1493         for (i = 0; i < RCL_NR; ++i) {
1494                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
1495                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
1496                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
1497                 }
1498                 /*
1499                  * Last field in old format can be shorter than in new.
1500                  */
1501                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
1502                         FMT_FIELD(old, i, j)->rmf_size);
1503         }
1504         /* last field should be returned to the unswabbed state */
1505         pill->rc_swabbed &= ~(__u32)(1 << j);
1506         pill->rc_fmt = fmt;
1507 }
1508 EXPORT_SYMBOL(req_capsule_extend);
1509
1510 int req_capsule_has_field(const struct req_capsule *pill,
1511                           const struct req_msg_field *field,
1512                           enum req_location loc)
1513 {
1514         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1515
1516         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1517 }
1518 EXPORT_SYMBOL(req_capsule_has_field);
1519
1520 int req_capsule_field_present(const struct req_capsule *pill,
1521                               const struct req_msg_field *field,
1522                               enum req_location loc)
1523 {
1524         int offset;
1525
1526         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
1527         LASSERT(req_capsule_has_field(pill, field, loc));
1528
1529         offset = __req_capsule_offset(pill, field, loc);
1530         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
1531 }
1532 EXPORT_SYMBOL(req_capsule_field_present);
1533
1534 void req_capsule_shrink(struct req_capsule *pill,
1535                         const struct req_msg_field *field,
1536                         unsigned int newlen,
1537                         enum req_location loc)
1538 {
1539         const struct req_format *fmt;
1540         struct lustre_msg       *msg;
1541         int                      len;
1542         int                      offset;
1543
1544         fmt = pill->rc_fmt;
1545         LASSERT(fmt != NULL);
1546         LASSERT(__req_format_is_sane(fmt));
1547         LASSERT(req_capsule_has_field(pill, field, loc));
1548         LASSERT(req_capsule_field_present(pill, field, loc));
1549
1550         offset = __req_capsule_offset(pill, field, loc);
1551
1552         msg = __req_msg(pill, loc);
1553         len = lustre_msg_buflen(msg, offset);
1554         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
1555                                 fmt->rf_name, field->rmf_name, len, newlen);
1556
1557         if (loc == RCL_CLIENT)
1558                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
1559                                                             1);
1560         else
1561                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
1562                                                             1);
1563 }
1564 EXPORT_SYMBOL(req_capsule_shrink);
1565
1566 /* __REQ_LAYOUT_USER__ */
1567 #endif