drivers/staging/lustre/lustre/ptlrpc/layout.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  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  * This file contains the "capsule/pill" abstraction layered above PTLRPC.
  44  *
  45  * Every struct ptlrpc_request contains a "pill", which points to a description
  46  * of the format that the request conforms to.
  47  */
  48
  49 #if !defined(__REQ_LAYOUT_USER__)
  50
  51 #define DEBUG_SUBSYSTEM S_RPC
  52
  53 #include <linux/module.h>
  54
  55 /* LUSTRE_VERSION_CODE */
  56 #include <lustre_ver.h>
  57
  58 #include <obd_support.h>
  59 /* lustre_swab_mdt_body */
  60 #include <lustre/lustre_idl.h>
  61 /* obd2cli_tgt() (required by DEBUG_REQ()) */
  62 #include <obd.h>
  63
  64 /* __REQ_LAYOUT_USER__ */
  65 #endif
  66 /* struct ptlrpc_request, lustre_msg* */
  67 #include <lustre_req_layout.h>
  68 #include <lustre_update.h>
  69 #include <lustre_acl.h>
  70 #include <lustre_debug.h>
  71
  72 /*
  73  * RQFs (see below) refer to two struct req_msg_field arrays describing the
  74  * client request and server reply, respectively.
  75  */
  76 /* empty set of fields... for suitable definition of emptiness. */
  77 static const struct req_msg_field *empty[] = {
  78         &RMF_PTLRPC_BODY
  79 };
  80
  81 static const struct req_msg_field *mgs_target_info_only[] = {
  82         &RMF_PTLRPC_BODY,
  83         &RMF_MGS_TARGET_INFO
  84 };
  85
  86 static const struct req_msg_field *mgs_set_info[] = {
  87         &RMF_PTLRPC_BODY,
  88         &RMF_MGS_SEND_PARAM
  89 };
  90
  91 static const struct req_msg_field *mgs_config_read_client[] = {
  92         &RMF_PTLRPC_BODY,
  93         &RMF_MGS_CONFIG_BODY
  94 };
  95
  96 static const struct req_msg_field *mgs_config_read_server[] = {
  97         &RMF_PTLRPC_BODY,
  98         &RMF_MGS_CONFIG_RES
  99 };
 100
 101 static const struct req_msg_field *log_cancel_client[] = {
 102         &RMF_PTLRPC_BODY,
 103         &RMF_LOGCOOKIES
 104 };
 105
 106 static const struct req_msg_field *mdt_body_only[] = {
 107         &RMF_PTLRPC_BODY,
 108         &RMF_MDT_BODY
 109 };
 110
 111 static const struct req_msg_field *mdt_body_capa[] = {
 112         &RMF_PTLRPC_BODY,
 113         &RMF_MDT_BODY,
 114         &RMF_CAPA1
 115 };
 116
 117 static const struct req_msg_field *quotactl_only[] = {
 118         &RMF_PTLRPC_BODY,
 119         &RMF_OBD_QUOTACTL
 120 };
 121
 122 static const struct req_msg_field *quota_body_only[] = {
 123         &RMF_PTLRPC_BODY,
 124         &RMF_QUOTA_BODY
 125 };
 126
 127 static const struct req_msg_field *ldlm_intent_quota_client[] = {
 128         &RMF_PTLRPC_BODY,
 129         &RMF_DLM_REQ,
 130         &RMF_LDLM_INTENT,
 131         &RMF_QUOTA_BODY
 132 };
 133
 134 static const struct req_msg_field *ldlm_intent_quota_server[] = {
 135         &RMF_PTLRPC_BODY,
 136         &RMF_DLM_REP,
 137         &RMF_DLM_LVB,
 138         &RMF_QUOTA_BODY
 139 };
 140
 141 static const struct req_msg_field *mdt_close_client[] = {
 142         &RMF_PTLRPC_BODY,
 143         &RMF_MDT_EPOCH,
 144         &RMF_REC_REINT,
 145         &RMF_CAPA1
 146 };
 147
 148 static const struct req_msg_field *mdt_release_close_client[] = {
 149         &RMF_PTLRPC_BODY,
 150         &RMF_MDT_EPOCH,
 151         &RMF_REC_REINT,
 152         &RMF_CAPA1,
 153         &RMF_CLOSE_DATA
 154 };
 155
 156 static const struct req_msg_field *obd_statfs_server[] = {
 157         &RMF_PTLRPC_BODY,
 158         &RMF_OBD_STATFS
 159 };
 160
 161 static const struct req_msg_field *seq_query_client[] = {
 162         &RMF_PTLRPC_BODY,
 163         &RMF_SEQ_OPC,
 164         &RMF_SEQ_RANGE
 165 };
 166
 167 static const struct req_msg_field *seq_query_server[] = {
 168         &RMF_PTLRPC_BODY,
 169         &RMF_SEQ_RANGE
 170 };
 171
 172 static const struct req_msg_field *fld_query_client[] = {
 173         &RMF_PTLRPC_BODY,
 174         &RMF_FLD_OPC,
 175         &RMF_FLD_MDFLD
 176 };
 177
 178 static const struct req_msg_field *fld_query_server[] = {
 179         &RMF_PTLRPC_BODY,
 180         &RMF_FLD_MDFLD
 181 };
 182
 183 static const struct req_msg_field *mds_getattr_name_client[] = {
 184         &RMF_PTLRPC_BODY,
 185         &RMF_MDT_BODY,
 186         &RMF_CAPA1,
 187         &RMF_NAME
 188 };
 189
 190 static const struct req_msg_field *mds_reint_client[] = {
 191         &RMF_PTLRPC_BODY,
 192         &RMF_REC_REINT
 193 };
 194
 195 static const struct req_msg_field *mds_reint_create_client[] = {
 196         &RMF_PTLRPC_BODY,
 197         &RMF_REC_REINT,
 198         &RMF_CAPA1,
 199         &RMF_NAME
 200 };
 201
 202 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 203         &RMF_PTLRPC_BODY,
 204         &RMF_REC_REINT,
 205         &RMF_CAPA1,
 206         &RMF_NAME,
 207         &RMF_EADATA,
 208         &RMF_DLM_REQ
 209 };
 210
 211 static const struct req_msg_field *mds_reint_create_rmt_acl_client[] = {
 212         &RMF_PTLRPC_BODY,
 213         &RMF_REC_REINT,
 214         &RMF_CAPA1,
 215         &RMF_NAME,
 216         &RMF_EADATA,
 217         &RMF_DLM_REQ
 218 };
 219
 220 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 221         &RMF_PTLRPC_BODY,
 222         &RMF_REC_REINT,
 223         &RMF_CAPA1,
 224         &RMF_NAME,
 225         &RMF_SYMTGT,
 226         &RMF_DLM_REQ
 227 };
 228
 229 static const struct req_msg_field *mds_reint_open_client[] = {
 230         &RMF_PTLRPC_BODY,
 231         &RMF_REC_REINT,
 232         &RMF_CAPA1,
 233         &RMF_CAPA2,
 234         &RMF_NAME,
 235         &RMF_EADATA
 236 };
 237
 238 static const struct req_msg_field *mds_reint_open_server[] = {
 239         &RMF_PTLRPC_BODY,
 240         &RMF_MDT_BODY,
 241         &RMF_MDT_MD,
 242         &RMF_ACL,
 243         &RMF_CAPA1,
 244         &RMF_CAPA2
 245 };
 246
 247 static const struct req_msg_field *mds_reint_unlink_client[] = {
 248         &RMF_PTLRPC_BODY,
 249         &RMF_REC_REINT,
 250         &RMF_CAPA1,
 251         &RMF_NAME,
 252         &RMF_DLM_REQ
 253 };
 254
 255 static const struct req_msg_field *mds_reint_link_client[] = {
 256         &RMF_PTLRPC_BODY,
 257         &RMF_REC_REINT,
 258         &RMF_CAPA1,
 259         &RMF_CAPA2,
 260         &RMF_NAME,
 261         &RMF_DLM_REQ
 262 };
 263
 264 static const struct req_msg_field *mds_reint_rename_client[] = {
 265         &RMF_PTLRPC_BODY,
 266         &RMF_REC_REINT,
 267         &RMF_CAPA1,
 268         &RMF_CAPA2,
 269         &RMF_NAME,
 270         &RMF_SYMTGT,
 271         &RMF_DLM_REQ
 272 };
 273
 274 static const struct req_msg_field *mds_last_unlink_server[] = {
 275         &RMF_PTLRPC_BODY,
 276         &RMF_MDT_BODY,
 277         &RMF_MDT_MD,
 278         &RMF_LOGCOOKIES,
 279         &RMF_CAPA1,
 280         &RMF_CAPA2
 281 };
 282
 283 static const struct req_msg_field *mds_reint_setattr_client[] = {
 284         &RMF_PTLRPC_BODY,
 285         &RMF_REC_REINT,
 286         &RMF_CAPA1,
 287         &RMF_MDT_EPOCH,
 288         &RMF_EADATA,
 289         &RMF_LOGCOOKIES,
 290         &RMF_DLM_REQ
 291 };
 292
 293 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 294         &RMF_PTLRPC_BODY,
 295         &RMF_REC_REINT,
 296         &RMF_CAPA1,
 297         &RMF_NAME,
 298         &RMF_EADATA
 299 };
 300
 301 static const struct req_msg_field *mdt_swap_layouts[] = {
 302         &RMF_PTLRPC_BODY,
 303         &RMF_MDT_BODY,
 304         &RMF_SWAP_LAYOUTS,
 305         &RMF_CAPA1,
 306         &RMF_CAPA2,
 307         &RMF_DLM_REQ
 308 };
 309
 310 static const struct req_msg_field *obd_connect_client[] = {
 311         &RMF_PTLRPC_BODY,
 312         &RMF_TGTUUID,
 313         &RMF_CLUUID,
 314         &RMF_CONN,
 315         &RMF_CONNECT_DATA
 316 };
 317
 318 static const struct req_msg_field *obd_connect_server[] = {
 319         &RMF_PTLRPC_BODY,
 320         &RMF_CONNECT_DATA
 321 };
 322
 323 static const struct req_msg_field *obd_set_info_client[] = {
 324         &RMF_PTLRPC_BODY,
 325         &RMF_SETINFO_KEY,
 326         &RMF_SETINFO_VAL
 327 };
 328
 329 static const struct req_msg_field *ost_grant_shrink_client[] = {
 330         &RMF_PTLRPC_BODY,
 331         &RMF_SETINFO_KEY,
 332         &RMF_OST_BODY
 333 };
 334
 335 static const struct req_msg_field *mds_getinfo_client[] = {
 336         &RMF_PTLRPC_BODY,
 337         &RMF_GETINFO_KEY,
 338         &RMF_GETINFO_VALLEN
 339 };
 340
 341 static const struct req_msg_field *mds_getinfo_server[] = {
 342         &RMF_PTLRPC_BODY,
 343         &RMF_GETINFO_VAL,
 344 };
 345
 346 static const struct req_msg_field *ldlm_enqueue_client[] = {
 347         &RMF_PTLRPC_BODY,
 348         &RMF_DLM_REQ
 349 };
 350
 351 static const struct req_msg_field *ldlm_enqueue_server[] = {
 352         &RMF_PTLRPC_BODY,
 353         &RMF_DLM_REP
 354 };
 355
 356 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 357         &RMF_PTLRPC_BODY,
 358         &RMF_DLM_REP,
 359         &RMF_DLM_LVB
 360 };
 361
 362 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 363         &RMF_PTLRPC_BODY,
 364         &RMF_DLM_REQ,
 365         &RMF_DLM_LVB
 366 };
 367
 368 static const struct req_msg_field *ldlm_gl_callback_desc_client[] = {
 369         &RMF_PTLRPC_BODY,
 370         &RMF_DLM_REQ,
 371         &RMF_DLM_GL_DESC
 372 };
 373
 374 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 375         &RMF_PTLRPC_BODY,
 376         &RMF_DLM_LVB
 377 };
 378
 379 static const struct req_msg_field *ldlm_intent_basic_client[] = {
 380         &RMF_PTLRPC_BODY,
 381         &RMF_DLM_REQ,
 382         &RMF_LDLM_INTENT,
 383 };
 384
 385 static const struct req_msg_field *ldlm_intent_client[] = {
 386         &RMF_PTLRPC_BODY,
 387         &RMF_DLM_REQ,
 388         &RMF_LDLM_INTENT,
 389         &RMF_REC_REINT
 390 };
 391
 392 static const struct req_msg_field *ldlm_intent_server[] = {
 393         &RMF_PTLRPC_BODY,
 394         &RMF_DLM_REP,
 395         &RMF_MDT_BODY,
 396         &RMF_MDT_MD,
 397         &RMF_ACL
 398 };
 399
 400 static const struct req_msg_field *ldlm_intent_layout_client[] = {
 401         &RMF_PTLRPC_BODY,
 402         &RMF_DLM_REQ,
 403         &RMF_LDLM_INTENT,
 404         &RMF_LAYOUT_INTENT,
 405         &RMF_EADATA /* for new layout to be set up */
 406 };
 407 static const struct req_msg_field *ldlm_intent_open_server[] = {
 408         &RMF_PTLRPC_BODY,
 409         &RMF_DLM_REP,
 410         &RMF_MDT_BODY,
 411         &RMF_MDT_MD,
 412         &RMF_ACL,
 413         &RMF_CAPA1,
 414         &RMF_CAPA2
 415 };
 416
 417 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 418         &RMF_PTLRPC_BODY,
 419         &RMF_DLM_REQ,
 420         &RMF_LDLM_INTENT,
 421         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 422         &RMF_CAPA1,
 423         &RMF_NAME
 424 };
 425
 426 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 427         &RMF_PTLRPC_BODY,
 428         &RMF_DLM_REP,
 429         &RMF_MDT_BODY,
 430         &RMF_MDT_MD,
 431         &RMF_ACL,
 432         &RMF_CAPA1
 433 };
 434
 435 static const struct req_msg_field *ldlm_intent_create_client[] = {
 436         &RMF_PTLRPC_BODY,
 437         &RMF_DLM_REQ,
 438         &RMF_LDLM_INTENT,
 439         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 440         &RMF_CAPA1,
 441         &RMF_NAME,
 442         &RMF_EADATA
 443 };
 444
 445 static const struct req_msg_field *ldlm_intent_open_client[] = {
 446         &RMF_PTLRPC_BODY,
 447         &RMF_DLM_REQ,
 448         &RMF_LDLM_INTENT,
 449         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 450         &RMF_CAPA1,
 451         &RMF_CAPA2,
 452         &RMF_NAME,
 453         &RMF_EADATA
 454 };
 455
 456 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 457         &RMF_PTLRPC_BODY,
 458         &RMF_DLM_REQ,
 459         &RMF_LDLM_INTENT,
 460         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 461         &RMF_CAPA1,
 462         &RMF_NAME
 463 };
 464
 465 static const struct req_msg_field *ldlm_intent_getxattr_client[] = {
 466         &RMF_PTLRPC_BODY,
 467         &RMF_DLM_REQ,
 468         &RMF_LDLM_INTENT,
 469         &RMF_MDT_BODY,
 470         &RMF_CAPA1,
 471 };
 472
 473 static const struct req_msg_field *ldlm_intent_getxattr_server[] = {
 474         &RMF_PTLRPC_BODY,
 475         &RMF_DLM_REP,
 476         &RMF_MDT_BODY,
 477         &RMF_MDT_MD,
 478         &RMF_ACL, /* for req_capsule_extend/mdt_intent_policy */
 479         &RMF_EADATA,
 480         &RMF_EAVALS,
 481         &RMF_EAVALS_LENS
 482 };
 483
 484 static const struct req_msg_field *mds_getxattr_client[] = {
 485         &RMF_PTLRPC_BODY,
 486         &RMF_MDT_BODY,
 487         &RMF_CAPA1,
 488         &RMF_NAME,
 489         &RMF_EADATA
 490 };
 491
 492 static const struct req_msg_field *mds_getxattr_server[] = {
 493         &RMF_PTLRPC_BODY,
 494         &RMF_MDT_BODY,
 495         &RMF_EADATA
 496 };
 497
 498 static const struct req_msg_field *mds_getattr_server[] = {
 499         &RMF_PTLRPC_BODY,
 500         &RMF_MDT_BODY,
 501         &RMF_MDT_MD,
 502         &RMF_ACL,
 503         &RMF_CAPA1,
 504         &RMF_CAPA2
 505 };
 506
 507 static const struct req_msg_field *mds_setattr_server[] = {
 508         &RMF_PTLRPC_BODY,
 509         &RMF_MDT_BODY,
 510         &RMF_MDT_MD,
 511         &RMF_ACL,
 512         &RMF_CAPA1,
 513         &RMF_CAPA2
 514 };
 515
 516 static const struct req_msg_field *mds_update_client[] = {
 517         &RMF_PTLRPC_BODY,
 518         &RMF_UPDATE,
 519 };
 520
 521 static const struct req_msg_field *mds_update_server[] = {
 522         &RMF_PTLRPC_BODY,
 523         &RMF_UPDATE_REPLY,
 524 };
 525
 526 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 527         &RMF_PTLRPC_BODY,
 528         &RMF_LLOGD_BODY,
 529         &RMF_NAME
 530 };
 531
 532 static const struct req_msg_field *llogd_body_only[] = {
 533         &RMF_PTLRPC_BODY,
 534         &RMF_LLOGD_BODY
 535 };
 536
 537 static const struct req_msg_field *llog_log_hdr_only[] = {
 538         &RMF_PTLRPC_BODY,
 539         &RMF_LLOG_LOG_HDR
 540 };
 541
 542 static const struct req_msg_field *llogd_conn_body_only[] = {
 543         &RMF_PTLRPC_BODY,
 544         &RMF_LLOGD_CONN_BODY
 545 };
 546
 547 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 548         &RMF_PTLRPC_BODY,
 549         &RMF_LLOGD_BODY,
 550         &RMF_EADATA
 551 };
 552
 553 static const struct req_msg_field *obd_idx_read_client[] = {
 554         &RMF_PTLRPC_BODY,
 555         &RMF_IDX_INFO
 556 };
 557
 558 static const struct req_msg_field *obd_idx_read_server[] = {
 559         &RMF_PTLRPC_BODY,
 560         &RMF_IDX_INFO
 561 };
 562
 563 static const struct req_msg_field *ost_body_only[] = {
 564         &RMF_PTLRPC_BODY,
 565         &RMF_OST_BODY
 566 };
 567
 568 static const struct req_msg_field *ost_body_capa[] = {
 569         &RMF_PTLRPC_BODY,
 570         &RMF_OST_BODY,
 571         &RMF_CAPA1
 572 };
 573
 574 static const struct req_msg_field *ost_destroy_client[] = {
 575         &RMF_PTLRPC_BODY,
 576         &RMF_OST_BODY,
 577         &RMF_DLM_REQ,
 578         &RMF_CAPA1
 579 };
 580
 581
 582 static const struct req_msg_field *ost_brw_client[] = {
 583         &RMF_PTLRPC_BODY,
 584         &RMF_OST_BODY,
 585         &RMF_OBD_IOOBJ,
 586         &RMF_NIOBUF_REMOTE,
 587         &RMF_CAPA1
 588 };
 589
 590 static const struct req_msg_field *ost_brw_read_server[] = {
 591         &RMF_PTLRPC_BODY,
 592         &RMF_OST_BODY
 593 };
 594
 595 static const struct req_msg_field *ost_brw_write_server[] = {
 596         &RMF_PTLRPC_BODY,
 597         &RMF_OST_BODY,
 598         &RMF_RCS
 599 };
 600
 601 static const struct req_msg_field *ost_get_info_generic_server[] = {
 602         &RMF_PTLRPC_BODY,
 603         &RMF_GENERIC_DATA,
 604 };
 605
 606 static const struct req_msg_field *ost_get_info_generic_client[] = {
 607         &RMF_PTLRPC_BODY,
 608         &RMF_SETINFO_KEY
 609 };
 610
 611 static const struct req_msg_field *ost_get_last_id_server[] = {
 612         &RMF_PTLRPC_BODY,
 613         &RMF_OBD_ID
 614 };
 615
 616 static const struct req_msg_field *ost_get_last_fid_server[] = {
 617         &RMF_PTLRPC_BODY,
 618         &RMF_FID,
 619 };
 620
 621 static const struct req_msg_field *ost_get_fiemap_client[] = {
 622         &RMF_PTLRPC_BODY,
 623         &RMF_FIEMAP_KEY,
 624         &RMF_FIEMAP_VAL
 625 };
 626
 627 static const struct req_msg_field *ost_get_fiemap_server[] = {
 628         &RMF_PTLRPC_BODY,
 629         &RMF_FIEMAP_VAL
 630 };
 631
 632 static const struct req_msg_field *mdt_hsm_progress[] = {
 633         &RMF_PTLRPC_BODY,
 634         &RMF_MDT_BODY,
 635         &RMF_MDS_HSM_PROGRESS,
 636 };
 637
 638 static const struct req_msg_field *mdt_hsm_ct_register[] = {
 639         &RMF_PTLRPC_BODY,
 640         &RMF_MDT_BODY,
 641         &RMF_MDS_HSM_ARCHIVE,
 642 };
 643
 644 static const struct req_msg_field *mdt_hsm_ct_unregister[] = {
 645         &RMF_PTLRPC_BODY,
 646         &RMF_MDT_BODY,
 647 };
 648
 649 static const struct req_msg_field *mdt_hsm_action_server[] = {
 650         &RMF_PTLRPC_BODY,
 651         &RMF_MDT_BODY,
 652         &RMF_MDS_HSM_CURRENT_ACTION,
 653 };
 654
 655 static const struct req_msg_field *mdt_hsm_state_get_server[] = {
 656         &RMF_PTLRPC_BODY,
 657         &RMF_MDT_BODY,
 658         &RMF_HSM_USER_STATE,
 659 };
 660
 661 static const struct req_msg_field *mdt_hsm_state_set[] = {
 662         &RMF_PTLRPC_BODY,
 663         &RMF_MDT_BODY,
 664         &RMF_CAPA1,
 665         &RMF_HSM_STATE_SET,
 666 };
 667
 668 static const struct req_msg_field *mdt_hsm_request[] = {
 669         &RMF_PTLRPC_BODY,
 670         &RMF_MDT_BODY,
 671         &RMF_MDS_HSM_REQUEST,
 672         &RMF_MDS_HSM_USER_ITEM,
 673         &RMF_GENERIC_DATA,
 674 };
 675
 676 static struct req_format *req_formats[] = {
 677         &RQF_OBD_PING,
 678         &RQF_OBD_SET_INFO,
 679         &RQF_OBD_IDX_READ,
 680         &RQF_SEC_CTX,
 681         &RQF_MGS_TARGET_REG,
 682         &RQF_MGS_SET_INFO,
 683         &RQF_MGS_CONFIG_READ,
 684         &RQF_SEQ_QUERY,
 685         &RQF_FLD_QUERY,
 686         &RQF_MDS_CONNECT,
 687         &RQF_MDS_DISCONNECT,
 688         &RQF_MDS_GET_INFO,
 689         &RQF_MDS_GETSTATUS,
 690         &RQF_MDS_STATFS,
 691         &RQF_MDS_GETATTR,
 692         &RQF_MDS_GETATTR_NAME,
 693         &RQF_MDS_GETXATTR,
 694         &RQF_MDS_SYNC,
 695         &RQF_MDS_CLOSE,
 696         &RQF_MDS_RELEASE_CLOSE,
 697         &RQF_MDS_PIN,
 698         &RQF_MDS_UNPIN,
 699         &RQF_MDS_READPAGE,
 700         &RQF_MDS_WRITEPAGE,
 701         &RQF_MDS_IS_SUBDIR,
 702         &RQF_MDS_DONE_WRITING,
 703         &RQF_MDS_REINT,
 704         &RQF_MDS_REINT_CREATE,
 705         &RQF_MDS_REINT_CREATE_RMT_ACL,
 706         &RQF_MDS_REINT_CREATE_SLAVE,
 707         &RQF_MDS_REINT_CREATE_SYM,
 708         &RQF_MDS_REINT_OPEN,
 709         &RQF_MDS_REINT_UNLINK,
 710         &RQF_MDS_REINT_LINK,
 711         &RQF_MDS_REINT_RENAME,
 712         &RQF_MDS_REINT_SETATTR,
 713         &RQF_MDS_REINT_SETXATTR,
 714         &RQF_MDS_QUOTACHECK,
 715         &RQF_MDS_QUOTACTL,
 716         &RQF_MDS_HSM_PROGRESS,
 717         &RQF_MDS_HSM_CT_REGISTER,
 718         &RQF_MDS_HSM_CT_UNREGISTER,
 719         &RQF_MDS_HSM_STATE_GET,
 720         &RQF_MDS_HSM_STATE_SET,
 721         &RQF_MDS_HSM_ACTION,
 722         &RQF_MDS_HSM_REQUEST,
 723         &RQF_MDS_SWAP_LAYOUTS,
 724         &RQF_UPDATE_OBJ,
 725         &RQF_QC_CALLBACK,
 726         &RQF_OST_CONNECT,
 727         &RQF_OST_DISCONNECT,
 728         &RQF_OST_QUOTACHECK,
 729         &RQF_OST_QUOTACTL,
 730         &RQF_OST_GETATTR,
 731         &RQF_OST_SETATTR,
 732         &RQF_OST_CREATE,
 733         &RQF_OST_PUNCH,
 734         &RQF_OST_SYNC,
 735         &RQF_OST_DESTROY,
 736         &RQF_OST_BRW_READ,
 737         &RQF_OST_BRW_WRITE,
 738         &RQF_OST_STATFS,
 739         &RQF_OST_SET_GRANT_INFO,
 740         &RQF_OST_GET_INFO_GENERIC,
 741         &RQF_OST_GET_INFO_LAST_ID,
 742         &RQF_OST_GET_INFO_LAST_FID,
 743         &RQF_OST_SET_INFO_LAST_FID,
 744         &RQF_OST_GET_INFO_FIEMAP,
 745         &RQF_LDLM_ENQUEUE,
 746         &RQF_LDLM_ENQUEUE_LVB,
 747         &RQF_LDLM_CONVERT,
 748         &RQF_LDLM_CANCEL,
 749         &RQF_LDLM_CALLBACK,
 750         &RQF_LDLM_CP_CALLBACK,
 751         &RQF_LDLM_BL_CALLBACK,
 752         &RQF_LDLM_GL_CALLBACK,
 753         &RQF_LDLM_GL_DESC_CALLBACK,
 754         &RQF_LDLM_INTENT,
 755         &RQF_LDLM_INTENT_BASIC,
 756         &RQF_LDLM_INTENT_LAYOUT,
 757         &RQF_LDLM_INTENT_GETATTR,
 758         &RQF_LDLM_INTENT_OPEN,
 759         &RQF_LDLM_INTENT_CREATE,
 760         &RQF_LDLM_INTENT_UNLINK,
 761         &RQF_LDLM_INTENT_GETXATTR,
 762         &RQF_LDLM_INTENT_QUOTA,
 763         &RQF_QUOTA_DQACQ,
 764         &RQF_LOG_CANCEL,
 765         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 766         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 767         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 768         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 769         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 770         &RQF_LLOG_ORIGIN_CONNECT,
 771         &RQF_CONNECT,
 772 };
 773
 774 struct req_msg_field {
 775         const __u32 rmf_flags;
 776         const char  *rmf_name;
 777         /**
 778          * Field length. (-1) means "variable length".  If the
 779          * \a RMF_F_STRUCT_ARRAY flag is set the field is also variable-length,
 780          * but the actual size must be a whole multiple of \a rmf_size.
 781          */
 782         const int   rmf_size;
 783         void    (*rmf_swabber)(void *);
 784         void    (*rmf_dumper)(void *);
 785         int      rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 786 };
 787
 788 enum rmf_flags {
 789         /**
 790          * The field is a string, must be NUL-terminated.
 791          */
 792         RMF_F_STRING = 1 << 0,
 793         /**
 794          * The field's buffer size need not match the declared \a rmf_size.
 795          */
 796         RMF_F_NO_SIZE_CHECK = 1 << 1,
 797         /**
 798          * The field's buffer size must be a whole multiple of the declared \a
 799          * rmf_size and the \a rmf_swabber function must work on the declared \a
 800          * rmf_size worth of bytes.
 801          */
 802         RMF_F_STRUCT_ARRAY = 1 << 2
 803 };
 804
 805 struct req_capsule;
 806
 807 /*
 808  * Request fields.
 809  */
 810 #define DEFINE_MSGF(name, flags, size, swabber, dumper) {       \
 811         .rmf_name    = (name),                            \
 812         .rmf_flags   = (flags),                          \
 813         .rmf_size    = (size),                            \
 814         .rmf_swabber = (void (*)(void*))(swabber),            \
 815         .rmf_dumper  = (void (*)(void*))(dumper)                \
 816 }
 817
 818 struct req_msg_field RMF_GENERIC_DATA =
 819         DEFINE_MSGF("generic_data", 0,
 820                     -1, NULL, NULL);
 821 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 822
 823 struct req_msg_field RMF_MGS_TARGET_INFO =
 824         DEFINE_MSGF("mgs_target_info", 0,
 825                     sizeof(struct mgs_target_info),
 826                     lustre_swab_mgs_target_info, NULL);
 827 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 828
 829 struct req_msg_field RMF_MGS_SEND_PARAM =
 830         DEFINE_MSGF("mgs_send_param", 0,
 831                     sizeof(struct mgs_send_param),
 832                     NULL, NULL);
 833 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 834
 835 struct req_msg_field RMF_MGS_CONFIG_BODY =
 836         DEFINE_MSGF("mgs_config_read request", 0,
 837                     sizeof(struct mgs_config_body),
 838                     lustre_swab_mgs_config_body, NULL);
 839 EXPORT_SYMBOL(RMF_MGS_CONFIG_BODY);
 840
 841 struct req_msg_field RMF_MGS_CONFIG_RES =
 842         DEFINE_MSGF("mgs_config_read reply ", 0,
 843                     sizeof(struct mgs_config_res),
 844                     lustre_swab_mgs_config_res, NULL);
 845 EXPORT_SYMBOL(RMF_MGS_CONFIG_RES);
 846
 847 struct req_msg_field RMF_U32 =
 848         DEFINE_MSGF("generic u32", 0,
 849                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 850 EXPORT_SYMBOL(RMF_U32);
 851
 852 struct req_msg_field RMF_SETINFO_VAL =
 853         DEFINE_MSGF("setinfo_val", 0, -1, NULL, NULL);
 854 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 855
 856 struct req_msg_field RMF_GETINFO_KEY =
 857         DEFINE_MSGF("getinfo_key", 0, -1, NULL, NULL);
 858 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 859
 860 struct req_msg_field RMF_GETINFO_VALLEN =
 861         DEFINE_MSGF("getinfo_vallen", 0,
 862                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 863 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 864
 865 struct req_msg_field RMF_GETINFO_VAL =
 866         DEFINE_MSGF("getinfo_val", 0, -1, NULL, NULL);
 867 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 868
 869 struct req_msg_field RMF_SEQ_OPC =
 870         DEFINE_MSGF("seq_query_opc", 0,
 871                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 872 EXPORT_SYMBOL(RMF_SEQ_OPC);
 873
 874 struct req_msg_field RMF_SEQ_RANGE =
 875         DEFINE_MSGF("seq_query_range", 0,
 876                     sizeof(struct lu_seq_range),
 877                     lustre_swab_lu_seq_range, NULL);
 878 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 879
 880 struct req_msg_field RMF_FLD_OPC =
 881         DEFINE_MSGF("fld_query_opc", 0,
 882                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 883 EXPORT_SYMBOL(RMF_FLD_OPC);
 884
 885 struct req_msg_field RMF_FLD_MDFLD =
 886         DEFINE_MSGF("fld_query_mdfld", 0,
 887                     sizeof(struct lu_seq_range),
 888                     lustre_swab_lu_seq_range, NULL);
 889 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 890
 891 struct req_msg_field RMF_MDT_BODY =
 892         DEFINE_MSGF("mdt_body", 0,
 893                     sizeof(struct mdt_body), lustre_swab_mdt_body, NULL);
 894 EXPORT_SYMBOL(RMF_MDT_BODY);
 895
 896 struct req_msg_field RMF_OBD_QUOTACTL =
 897         DEFINE_MSGF("obd_quotactl", 0,
 898                     sizeof(struct obd_quotactl),
 899                     lustre_swab_obd_quotactl, NULL);
 900 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 901
 902 struct req_msg_field RMF_QUOTA_BODY =
 903         DEFINE_MSGF("quota_body", 0,
 904                     sizeof(struct quota_body), lustre_swab_quota_body, NULL);
 905 EXPORT_SYMBOL(RMF_QUOTA_BODY);
 906
 907 struct req_msg_field RMF_MDT_EPOCH =
 908         DEFINE_MSGF("mdt_ioepoch", 0,
 909                     sizeof(struct mdt_ioepoch), lustre_swab_mdt_ioepoch, NULL);
 910 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 911
 912 struct req_msg_field RMF_PTLRPC_BODY =
 913         DEFINE_MSGF("ptlrpc_body", 0,
 914                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body, NULL);
 915 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 916
 917 struct req_msg_field RMF_CLOSE_DATA =
 918         DEFINE_MSGF("data_version", 0,
 919                     sizeof(struct close_data), lustre_swab_close_data, NULL);
 920 EXPORT_SYMBOL(RMF_CLOSE_DATA);
 921
 922 struct req_msg_field RMF_OBD_STATFS =
 923         DEFINE_MSGF("obd_statfs", 0,
 924                     sizeof(struct obd_statfs), lustre_swab_obd_statfs, NULL);
 925 EXPORT_SYMBOL(RMF_OBD_STATFS);
 926
 927 struct req_msg_field RMF_SETINFO_KEY =
 928         DEFINE_MSGF("setinfo_key", 0, -1, NULL, NULL);
 929 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 930
 931 struct req_msg_field RMF_NAME =
 932         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL, NULL);
 933 EXPORT_SYMBOL(RMF_NAME);
 934
 935 struct req_msg_field RMF_SYMTGT =
 936         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL, NULL);
 937 EXPORT_SYMBOL(RMF_SYMTGT);
 938
 939 struct req_msg_field RMF_TGTUUID =
 940         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 941         NULL);
 942 EXPORT_SYMBOL(RMF_TGTUUID);
 943
 944 struct req_msg_field RMF_CLUUID =
 945         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 946         NULL);
 947 EXPORT_SYMBOL(RMF_CLUUID);
 948
 949 struct req_msg_field RMF_STRING =
 950         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL, NULL);
 951 EXPORT_SYMBOL(RMF_STRING);
 952
 953 struct req_msg_field RMF_LLOGD_BODY =
 954         DEFINE_MSGF("llogd_body", 0,
 955                     sizeof(struct llogd_body), lustre_swab_llogd_body, NULL);
 956 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 957
 958 struct req_msg_field RMF_LLOG_LOG_HDR =
 959         DEFINE_MSGF("llog_log_hdr", 0,
 960                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr, NULL);
 961 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 962
 963 struct req_msg_field RMF_LLOGD_CONN_BODY =
 964         DEFINE_MSGF("llogd_conn_body", 0,
 965                     sizeof(struct llogd_conn_body),
 966                     lustre_swab_llogd_conn_body, NULL);
 967 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 968
 969 /*
 970  * connection handle received in MDS_CONNECT request.
 971  *
 972  * No swabbing needed because struct lustre_handle contains only a 64-bit cookie
 973  * that the client does not interpret at all.
 974  */
 975 struct req_msg_field RMF_CONN =
 976         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL, NULL);
 977 EXPORT_SYMBOL(RMF_CONN);
 978
 979 struct req_msg_field RMF_CONNECT_DATA =
 980         DEFINE_MSGF("cdata",
 981                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
 982 #if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(2, 7, 50, 0)
 983                     sizeof(struct obd_connect_data),
 984 #else
 985 /* For interoperability with 1.8 and 2.0 clients/servers.
 986  * The RPC verification code allows larger RPC buffers, but not
 987  * smaller buffers.  Until we no longer need to keep compatibility
 988  * with older servers/clients we can only check that the buffer
 989  * size is at least as large as obd_connect_data_v1.  That is not
 990  * not in itself harmful, since the chance of just corrupting this
 991  * field is low.  See JIRA LU-16 for details. */
 992                     sizeof(struct obd_connect_data_v1),
 993 #endif
 994                     lustre_swab_connect, NULL);
 995 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 996
 997 struct req_msg_field RMF_DLM_REQ =
 998         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
 999                     sizeof(struct ldlm_request),
1000                     lustre_swab_ldlm_request, NULL);
1001 EXPORT_SYMBOL(RMF_DLM_REQ);
1002
1003 struct req_msg_field RMF_DLM_REP =
1004         DEFINE_MSGF("dlm_rep", 0,
1005                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply, NULL);
1006 EXPORT_SYMBOL(RMF_DLM_REP);
1007
1008 struct req_msg_field RMF_LDLM_INTENT =
1009         DEFINE_MSGF("ldlm_intent", 0,
1010                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent, NULL);
1011 EXPORT_SYMBOL(RMF_LDLM_INTENT);
1012
1013 struct req_msg_field RMF_DLM_LVB =
1014         DEFINE_MSGF("dlm_lvb", 0, -1, NULL, NULL);
1015 EXPORT_SYMBOL(RMF_DLM_LVB);
1016
1017 struct req_msg_field RMF_DLM_GL_DESC =
1018         DEFINE_MSGF("dlm_gl_desc", 0, sizeof(union ldlm_gl_desc),
1019                     lustre_swab_gl_desc, NULL);
1020 EXPORT_SYMBOL(RMF_DLM_GL_DESC);
1021
1022 struct req_msg_field RMF_MDT_MD =
1023         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL, NULL);
1024 EXPORT_SYMBOL(RMF_MDT_MD);
1025
1026 struct req_msg_field RMF_REC_REINT =
1027         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
1028                     lustre_swab_mdt_rec_reint, NULL);
1029 EXPORT_SYMBOL(RMF_REC_REINT);
1030
1031 /* FIXME: this length should be defined as a macro */
1032 struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1,
1033                                                     NULL, NULL);
1034 EXPORT_SYMBOL(RMF_EADATA);
1035
1036 struct req_msg_field RMF_EAVALS = DEFINE_MSGF("eavals", 0, -1, NULL, NULL);
1037 EXPORT_SYMBOL(RMF_EAVALS);
1038
1039 struct req_msg_field RMF_ACL =
1040         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
1041                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL, NULL);
1042 EXPORT_SYMBOL(RMF_ACL);
1043
1044 /* FIXME: this should be made to use RMF_F_STRUCT_ARRAY */
1045 struct req_msg_field RMF_LOGCOOKIES =
1046         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
1047                     sizeof(struct llog_cookie), NULL, NULL);
1048 EXPORT_SYMBOL(RMF_LOGCOOKIES);
1049
1050 struct req_msg_field RMF_CAPA1 =
1051         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1052                     lustre_swab_lustre_capa, NULL);
1053 EXPORT_SYMBOL(RMF_CAPA1);
1054
1055 struct req_msg_field RMF_CAPA2 =
1056         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1057                     lustre_swab_lustre_capa, NULL);
1058 EXPORT_SYMBOL(RMF_CAPA2);
1059
1060 struct req_msg_field RMF_LAYOUT_INTENT =
1061         DEFINE_MSGF("layout_intent", 0,
1062                     sizeof(struct layout_intent), lustre_swab_layout_intent,
1063                     NULL);
1064 EXPORT_SYMBOL(RMF_LAYOUT_INTENT);
1065
1066 /*
1067  * OST request field.
1068  */
1069 struct req_msg_field RMF_OST_BODY =
1070         DEFINE_MSGF("ost_body", 0,
1071                     sizeof(struct ost_body), lustre_swab_ost_body, dump_ost_body);
1072 EXPORT_SYMBOL(RMF_OST_BODY);
1073
1074 struct req_msg_field RMF_OBD_IOOBJ =
1075         DEFINE_MSGF("obd_ioobj", RMF_F_STRUCT_ARRAY,
1076                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj, dump_ioo);
1077 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
1078
1079 struct req_msg_field RMF_NIOBUF_REMOTE =
1080         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY,
1081                     sizeof(struct niobuf_remote), lustre_swab_niobuf_remote,
1082                     dump_rniobuf);
1083 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
1084
1085 struct req_msg_field RMF_RCS =
1086         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1087                     lustre_swab_generic_32s, dump_rcs);
1088 EXPORT_SYMBOL(RMF_RCS);
1089
1090 struct req_msg_field RMF_EAVALS_LENS =
1091         DEFINE_MSGF("eavals_lens", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1092                 lustre_swab_generic_32s, NULL);
1093 EXPORT_SYMBOL(RMF_EAVALS_LENS);
1094
1095 struct req_msg_field RMF_OBD_ID =
1096         DEFINE_MSGF("obd_id", 0,
1097                     sizeof(obd_id), lustre_swab_ost_last_id, NULL);
1098 EXPORT_SYMBOL(RMF_OBD_ID);
1099
1100 struct req_msg_field RMF_FID =
1101         DEFINE_MSGF("fid", 0,
1102                     sizeof(struct lu_fid), lustre_swab_lu_fid, NULL);
1103 EXPORT_SYMBOL(RMF_FID);
1104
1105 struct req_msg_field RMF_OST_ID =
1106         DEFINE_MSGF("ost_id", 0,
1107                     sizeof(struct ost_id), lustre_swab_ost_id, NULL);
1108 EXPORT_SYMBOL(RMF_OST_ID);
1109
1110 struct req_msg_field RMF_FIEMAP_KEY =
1111         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
1112                     lustre_swab_fiemap, NULL);
1113 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
1114
1115 struct req_msg_field RMF_FIEMAP_VAL =
1116         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap, NULL);
1117 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
1118
1119 struct req_msg_field RMF_IDX_INFO =
1120         DEFINE_MSGF("idx_info", 0, sizeof(struct idx_info),
1121                     lustre_swab_idx_info, NULL);
1122 EXPORT_SYMBOL(RMF_IDX_INFO);
1123 struct req_msg_field RMF_HSM_USER_STATE =
1124         DEFINE_MSGF("hsm_user_state", 0, sizeof(struct hsm_user_state),
1125                     lustre_swab_hsm_user_state, NULL);
1126 EXPORT_SYMBOL(RMF_HSM_USER_STATE);
1127
1128 struct req_msg_field RMF_HSM_STATE_SET =
1129         DEFINE_MSGF("hsm_state_set", 0, sizeof(struct hsm_state_set),
1130                     lustre_swab_hsm_state_set, NULL);
1131 EXPORT_SYMBOL(RMF_HSM_STATE_SET);
1132
1133 struct req_msg_field RMF_MDS_HSM_PROGRESS =
1134         DEFINE_MSGF("hsm_progress", 0, sizeof(struct hsm_progress_kernel),
1135                     lustre_swab_hsm_progress_kernel, NULL);
1136 EXPORT_SYMBOL(RMF_MDS_HSM_PROGRESS);
1137
1138 struct req_msg_field RMF_MDS_HSM_CURRENT_ACTION =
1139         DEFINE_MSGF("hsm_current_action", 0, sizeof(struct hsm_current_action),
1140                     lustre_swab_hsm_current_action, NULL);
1141 EXPORT_SYMBOL(RMF_MDS_HSM_CURRENT_ACTION);
1142
1143 struct req_msg_field RMF_MDS_HSM_USER_ITEM =
1144         DEFINE_MSGF("hsm_user_item", RMF_F_STRUCT_ARRAY,
1145                     sizeof(struct hsm_user_item), lustre_swab_hsm_user_item,
1146                     NULL);
1147 EXPORT_SYMBOL(RMF_MDS_HSM_USER_ITEM);
1148
1149 struct req_msg_field RMF_MDS_HSM_ARCHIVE =
1150         DEFINE_MSGF("hsm_archive", 0,
1151                     sizeof(__u32), lustre_swab_generic_32s, NULL);
1152 EXPORT_SYMBOL(RMF_MDS_HSM_ARCHIVE);
1153
1154 struct req_msg_field RMF_MDS_HSM_REQUEST =
1155         DEFINE_MSGF("hsm_request", 0, sizeof(struct hsm_request),
1156                     lustre_swab_hsm_request, NULL);
1157 EXPORT_SYMBOL(RMF_MDS_HSM_REQUEST);
1158
1159 struct req_msg_field RMF_UPDATE = DEFINE_MSGF("update", 0, -1,
1160                                               lustre_swab_update_buf, NULL);
1161 EXPORT_SYMBOL(RMF_UPDATE);
1162
1163 struct req_msg_field RMF_UPDATE_REPLY = DEFINE_MSGF("update_reply", 0, -1,
1164                                                 lustre_swab_update_reply_buf,
1165                                                     NULL);
1166 EXPORT_SYMBOL(RMF_UPDATE_REPLY);
1167
1168 struct req_msg_field RMF_SWAP_LAYOUTS =
1169         DEFINE_MSGF("swap_layouts", 0, sizeof(struct  mdc_swap_layouts),
1170                     lustre_swab_swap_layouts, NULL);
1171 EXPORT_SYMBOL(RMF_SWAP_LAYOUTS);
1172 /*
1173  * Request formats.
1174  */
1175
1176 struct req_format {
1177         const char *rf_name;
1178         int      rf_idx;
1179         struct {
1180                 int                       nr;
1181                 const struct req_msg_field **d;
1182         } rf_fields[RCL_NR];
1183 };
1184
1185 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
1186         .rf_name   = name,                                            \
1187         .rf_fields = {                                            \
1188                 [RCL_CLIENT] = {                                        \
1189                         .nr = client_nr,                                \
1190                         .d  = client                                \
1191                 },                                                    \
1192                 [RCL_SERVER] = {                                        \
1193                         .nr = server_nr,                                \
1194                         .d  = server                                \
1195                 }                                                      \
1196         }                                                              \
1197 }
1198
1199 #define DEFINE_REQ_FMT0(name, client, server)                             \
1200 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
1201
1202 struct req_format RQF_OBD_PING =
1203         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
1204 EXPORT_SYMBOL(RQF_OBD_PING);
1205
1206 struct req_format RQF_OBD_SET_INFO =
1207         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
1208 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
1209
1210 /* Read index file through the network */
1211 struct req_format RQF_OBD_IDX_READ =
1212         DEFINE_REQ_FMT0("OBD_IDX_READ",
1213                         obd_idx_read_client, obd_idx_read_server);
1214 EXPORT_SYMBOL(RQF_OBD_IDX_READ);
1215
1216 struct req_format RQF_SEC_CTX =
1217         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
1218 EXPORT_SYMBOL(RQF_SEC_CTX);
1219
1220 struct req_format RQF_MGS_TARGET_REG =
1221         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
1222                          mgs_target_info_only);
1223 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
1224
1225 struct req_format RQF_MGS_SET_INFO =
1226         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
1227                          mgs_set_info);
1228 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
1229
1230 struct req_format RQF_MGS_CONFIG_READ =
1231         DEFINE_REQ_FMT0("MGS_CONFIG_READ", mgs_config_read_client,
1232                          mgs_config_read_server);
1233 EXPORT_SYMBOL(RQF_MGS_CONFIG_READ);
1234
1235 struct req_format RQF_SEQ_QUERY =
1236         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
1237 EXPORT_SYMBOL(RQF_SEQ_QUERY);
1238
1239 struct req_format RQF_FLD_QUERY =
1240         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
1241 EXPORT_SYMBOL(RQF_FLD_QUERY);
1242
1243 struct req_format RQF_LOG_CANCEL =
1244         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
1245 EXPORT_SYMBOL(RQF_LOG_CANCEL);
1246
1247 struct req_format RQF_MDS_QUOTACHECK =
1248         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
1249 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
1250
1251 struct req_format RQF_OST_QUOTACHECK =
1252         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
1253 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
1254
1255 struct req_format RQF_MDS_QUOTACTL =
1256         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
1257 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
1258
1259 struct req_format RQF_OST_QUOTACTL =
1260         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
1261 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
1262
1263 struct req_format RQF_QC_CALLBACK =
1264         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
1265 EXPORT_SYMBOL(RQF_QC_CALLBACK);
1266
1267 struct req_format RQF_QUOTA_DQACQ =
1268         DEFINE_REQ_FMT0("QUOTA_DQACQ", quota_body_only, quota_body_only);
1269 EXPORT_SYMBOL(RQF_QUOTA_DQACQ);
1270
1271 struct req_format RQF_LDLM_INTENT_QUOTA =
1272         DEFINE_REQ_FMT0("LDLM_INTENT_QUOTA",
1273                         ldlm_intent_quota_client,
1274                         ldlm_intent_quota_server);
1275 EXPORT_SYMBOL(RQF_LDLM_INTENT_QUOTA);
1276
1277 struct req_format RQF_MDS_GETSTATUS =
1278         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
1279 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
1280
1281 struct req_format RQF_MDS_STATFS =
1282         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
1283 EXPORT_SYMBOL(RQF_MDS_STATFS);
1284
1285 struct req_format RQF_MDS_SYNC =
1286         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
1287 EXPORT_SYMBOL(RQF_MDS_SYNC);
1288
1289 struct req_format RQF_MDS_GETATTR =
1290         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
1291 EXPORT_SYMBOL(RQF_MDS_GETATTR);
1292
1293 struct req_format RQF_MDS_GETXATTR =
1294         DEFINE_REQ_FMT0("MDS_GETXATTR",
1295                         mds_getxattr_client, mds_getxattr_server);
1296 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
1297
1298 struct req_format RQF_MDS_GETATTR_NAME =
1299         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
1300                         mds_getattr_name_client, mds_getattr_server);
1301 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
1302
1303 struct req_format RQF_MDS_REINT =
1304         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
1305 EXPORT_SYMBOL(RQF_MDS_REINT);
1306
1307 struct req_format RQF_MDS_REINT_CREATE =
1308         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
1309                         mds_reint_create_client, mdt_body_capa);
1310 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
1311
1312 struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
1313         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
1314                         mds_reint_create_rmt_acl_client, mdt_body_capa);
1315 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
1316
1317 struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1318         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1319                         mds_reint_create_slave_client, mdt_body_capa);
1320 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1321
1322 struct req_format RQF_MDS_REINT_CREATE_SYM =
1323         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1324                         mds_reint_create_sym_client, mdt_body_capa);
1325 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1326
1327 struct req_format RQF_MDS_REINT_OPEN =
1328         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1329                         mds_reint_open_client, mds_reint_open_server);
1330 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1331
1332 struct req_format RQF_MDS_REINT_UNLINK =
1333         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1334                         mds_last_unlink_server);
1335 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1336
1337 struct req_format RQF_MDS_REINT_LINK =
1338         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1339                         mds_reint_link_client, mdt_body_only);
1340 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1341
1342 struct req_format RQF_MDS_REINT_RENAME =
1343         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1344                         mds_last_unlink_server);
1345 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1346
1347 struct req_format RQF_MDS_REINT_SETATTR =
1348         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1349                         mds_reint_setattr_client, mds_setattr_server);
1350 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1351
1352 struct req_format RQF_MDS_REINT_SETXATTR =
1353         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1354                         mds_reint_setxattr_client, mdt_body_only);
1355 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1356
1357 struct req_format RQF_MDS_CONNECT =
1358         DEFINE_REQ_FMT0("MDS_CONNECT",
1359                         obd_connect_client, obd_connect_server);
1360 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1361
1362 struct req_format RQF_MDS_DISCONNECT =
1363         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1364 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1365
1366 struct req_format RQF_MDS_GET_INFO =
1367         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1368                         mds_getinfo_server);
1369 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1370
1371 struct req_format RQF_UPDATE_OBJ =
1372         DEFINE_REQ_FMT0("OBJECT_UPDATE_OBJ", mds_update_client,
1373                         mds_update_server);
1374 EXPORT_SYMBOL(RQF_UPDATE_OBJ);
1375
1376 struct req_format RQF_LDLM_ENQUEUE =
1377         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1378                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1379 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1380
1381 struct req_format RQF_LDLM_ENQUEUE_LVB =
1382         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1383                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1384 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1385
1386 struct req_format RQF_LDLM_CONVERT =
1387         DEFINE_REQ_FMT0("LDLM_CONVERT",
1388                         ldlm_enqueue_client, ldlm_enqueue_server);
1389 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1390
1391 struct req_format RQF_LDLM_CANCEL =
1392         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1393 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1394
1395 struct req_format RQF_LDLM_CALLBACK =
1396         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1397 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1398
1399 struct req_format RQF_LDLM_CP_CALLBACK =
1400         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1401 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1402
1403 struct req_format RQF_LDLM_BL_CALLBACK =
1404         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1405 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1406
1407 struct req_format RQF_LDLM_GL_CALLBACK =
1408         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1409                         ldlm_gl_callback_server);
1410 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1411
1412 struct req_format RQF_LDLM_GL_DESC_CALLBACK =
1413         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_gl_callback_desc_client,
1414                         ldlm_gl_callback_server);
1415 EXPORT_SYMBOL(RQF_LDLM_GL_DESC_CALLBACK);
1416
1417 struct req_format RQF_LDLM_INTENT_BASIC =
1418         DEFINE_REQ_FMT0("LDLM_INTENT_BASIC",
1419                         ldlm_intent_basic_client, ldlm_enqueue_lvb_server);
1420 EXPORT_SYMBOL(RQF_LDLM_INTENT_BASIC);
1421
1422 struct req_format RQF_LDLM_INTENT =
1423         DEFINE_REQ_FMT0("LDLM_INTENT",
1424                         ldlm_intent_client, ldlm_intent_server);
1425 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1426
1427 struct req_format RQF_LDLM_INTENT_LAYOUT =
1428         DEFINE_REQ_FMT0("LDLM_INTENT_LAYOUT ",
1429                         ldlm_intent_layout_client, ldlm_enqueue_lvb_server);
1430 EXPORT_SYMBOL(RQF_LDLM_INTENT_LAYOUT);
1431
1432 struct req_format RQF_LDLM_INTENT_GETATTR =
1433         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1434                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1435 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1436
1437 struct req_format RQF_LDLM_INTENT_OPEN =
1438         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1439                         ldlm_intent_open_client, ldlm_intent_open_server);
1440 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1441
1442 struct req_format RQF_LDLM_INTENT_CREATE =
1443         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1444                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1445 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1446
1447 struct req_format RQF_LDLM_INTENT_UNLINK =
1448         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1449                         ldlm_intent_unlink_client, ldlm_intent_server);
1450 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1451
1452 struct req_format RQF_LDLM_INTENT_GETXATTR =
1453         DEFINE_REQ_FMT0("LDLM_INTENT_GETXATTR",
1454                         ldlm_intent_getxattr_client,
1455                         ldlm_intent_getxattr_server);
1456 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETXATTR);
1457
1458 struct req_format RQF_MDS_CLOSE =
1459         DEFINE_REQ_FMT0("MDS_CLOSE",
1460                         mdt_close_client, mds_last_unlink_server);
1461 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1462
1463 struct req_format RQF_MDS_RELEASE_CLOSE =
1464         DEFINE_REQ_FMT0("MDS_CLOSE",
1465                         mdt_release_close_client, mds_last_unlink_server);
1466 EXPORT_SYMBOL(RQF_MDS_RELEASE_CLOSE);
1467
1468 struct req_format RQF_MDS_PIN =
1469         DEFINE_REQ_FMT0("MDS_PIN",
1470                         mdt_body_capa, mdt_body_only);
1471 EXPORT_SYMBOL(RQF_MDS_PIN);
1472
1473 struct req_format RQF_MDS_UNPIN =
1474         DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1475 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1476
1477 struct req_format RQF_MDS_DONE_WRITING =
1478         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1479                         mdt_close_client, mdt_body_only);
1480 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1481
1482 struct req_format RQF_MDS_READPAGE =
1483         DEFINE_REQ_FMT0("MDS_READPAGE",
1484                         mdt_body_capa, mdt_body_only);
1485 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1486
1487 struct req_format RQF_MDS_HSM_ACTION =
1488         DEFINE_REQ_FMT0("MDS_HSM_ACTION", mdt_body_capa, mdt_hsm_action_server);
1489 EXPORT_SYMBOL(RQF_MDS_HSM_ACTION);
1490
1491 struct req_format RQF_MDS_HSM_PROGRESS =
1492         DEFINE_REQ_FMT0("MDS_HSM_PROGRESS", mdt_hsm_progress, empty);
1493 EXPORT_SYMBOL(RQF_MDS_HSM_PROGRESS);
1494
1495 struct req_format RQF_MDS_HSM_CT_REGISTER =
1496         DEFINE_REQ_FMT0("MDS_HSM_CT_REGISTER", mdt_hsm_ct_register, empty);
1497 EXPORT_SYMBOL(RQF_MDS_HSM_CT_REGISTER);
1498
1499 struct req_format RQF_MDS_HSM_CT_UNREGISTER =
1500         DEFINE_REQ_FMT0("MDS_HSM_CT_UNREGISTER", mdt_hsm_ct_unregister, empty);
1501 EXPORT_SYMBOL(RQF_MDS_HSM_CT_UNREGISTER);
1502
1503 struct req_format RQF_MDS_HSM_STATE_GET =
1504         DEFINE_REQ_FMT0("MDS_HSM_STATE_GET",
1505                         mdt_body_capa, mdt_hsm_state_get_server);
1506 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_GET);
1507
1508 struct req_format RQF_MDS_HSM_STATE_SET =
1509         DEFINE_REQ_FMT0("MDS_HSM_STATE_SET", mdt_hsm_state_set, empty);
1510 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_SET);
1511
1512 struct req_format RQF_MDS_HSM_REQUEST =
1513         DEFINE_REQ_FMT0("MDS_HSM_REQUEST", mdt_hsm_request, empty);
1514 EXPORT_SYMBOL(RQF_MDS_HSM_REQUEST);
1515
1516 struct req_format RQF_MDS_SWAP_LAYOUTS =
1517         DEFINE_REQ_FMT0("MDS_SWAP_LAYOUTS",
1518                         mdt_swap_layouts, empty);
1519 EXPORT_SYMBOL(RQF_MDS_SWAP_LAYOUTS);
1520
1521 /* This is for split */
1522 struct req_format RQF_MDS_WRITEPAGE =
1523         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1524                         mdt_body_capa, mdt_body_only);
1525 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1526
1527 struct req_format RQF_MDS_IS_SUBDIR =
1528         DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1529                         mdt_body_only, mdt_body_only);
1530 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1531
1532 struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1533         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1534                         llog_origin_handle_create_client, llogd_body_only);
1535 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1536
1537 struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1538         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1539                         llogd_body_only, llogd_body_only);
1540 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1541
1542 struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1543         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1544                         llogd_body_only, llog_origin_handle_next_block_server);
1545 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1546
1547 struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1548         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1549                         llogd_body_only, llog_origin_handle_next_block_server);
1550 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1551
1552 struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1553         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1554                         llogd_body_only, llog_log_hdr_only);
1555 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1556
1557 struct req_format RQF_LLOG_ORIGIN_CONNECT =
1558         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1559 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1560
1561 struct req_format RQF_CONNECT =
1562         DEFINE_REQ_FMT0("CONNECT", obd_connect_client, obd_connect_server);
1563 EXPORT_SYMBOL(RQF_CONNECT);
1564
1565 struct req_format RQF_OST_CONNECT =
1566         DEFINE_REQ_FMT0("OST_CONNECT",
1567                         obd_connect_client, obd_connect_server);
1568 EXPORT_SYMBOL(RQF_OST_CONNECT);
1569
1570 struct req_format RQF_OST_DISCONNECT =
1571         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1572 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1573
1574 struct req_format RQF_OST_GETATTR =
1575         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1576 EXPORT_SYMBOL(RQF_OST_GETATTR);
1577
1578 struct req_format RQF_OST_SETATTR =
1579         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1580 EXPORT_SYMBOL(RQF_OST_SETATTR);
1581
1582 struct req_format RQF_OST_CREATE =
1583         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1584 EXPORT_SYMBOL(RQF_OST_CREATE);
1585
1586 struct req_format RQF_OST_PUNCH =
1587         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1588 EXPORT_SYMBOL(RQF_OST_PUNCH);
1589
1590 struct req_format RQF_OST_SYNC =
1591         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1592 EXPORT_SYMBOL(RQF_OST_SYNC);
1593
1594 struct req_format RQF_OST_DESTROY =
1595         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1596 EXPORT_SYMBOL(RQF_OST_DESTROY);
1597
1598 struct req_format RQF_OST_BRW_READ =
1599         DEFINE_REQ_FMT0("OST_BRW_READ", ost_brw_client, ost_brw_read_server);
1600 EXPORT_SYMBOL(RQF_OST_BRW_READ);
1601
1602 struct req_format RQF_OST_BRW_WRITE =
1603         DEFINE_REQ_FMT0("OST_BRW_WRITE", ost_brw_client, ost_brw_write_server);
1604 EXPORT_SYMBOL(RQF_OST_BRW_WRITE);
1605
1606 struct req_format RQF_OST_STATFS =
1607         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1608 EXPORT_SYMBOL(RQF_OST_STATFS);
1609
1610 struct req_format RQF_OST_SET_GRANT_INFO =
1611         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", ost_grant_shrink_client,
1612                          ost_body_only);
1613 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1614
1615 struct req_format RQF_OST_GET_INFO_GENERIC =
1616         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1617                                         ost_get_info_generic_server);
1618 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1619
1620 struct req_format RQF_OST_GET_INFO_LAST_ID =
1621         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1622                                                 ost_get_last_id_server);
1623 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1624
1625 struct req_format RQF_OST_GET_INFO_LAST_FID =
1626         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_FID", obd_set_info_client,
1627                                                  ost_get_last_fid_server);
1628 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_FID);
1629
1630 struct req_format RQF_OST_SET_INFO_LAST_FID =
1631         DEFINE_REQ_FMT0("OST_SET_INFO_LAST_FID", obd_set_info_client,
1632                                                  empty);
1633 EXPORT_SYMBOL(RQF_OST_SET_INFO_LAST_FID);
1634
1635 struct req_format RQF_OST_GET_INFO_FIEMAP =
1636         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1637                                                ost_get_fiemap_server);
1638 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1639
1640 #if !defined(__REQ_LAYOUT_USER__)
1641
1642 /* Convenience macro */
1643 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1644
1645 /**
1646  * Initializes the capsule abstraction by computing and setting the \a rf_idx
1647  * field of RQFs and the \a rmf_offset field of RMFs.
1648  */
1649 int req_layout_init(void)
1650 {
1651         int i;
1652         int j;
1653         int k;
1654         struct req_format *rf = NULL;
1655
1656         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1657                 rf = req_formats[i];
1658                 rf->rf_idx = i;
1659                 for (j = 0; j < RCL_NR; ++j) {
1660                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1661                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1662                                 struct req_msg_field *field;
1663
1664                                 field = (typeof(field))rf->rf_fields[j].d[k];
1665                                 LASSERT(!(field->rmf_flags & RMF_F_STRUCT_ARRAY)
1666                                         || field->rmf_size > 0);
1667                                 LASSERT(field->rmf_offset[i][j] == 0);
1668                                 /*
1669                                  * k + 1 to detect unused format/field
1670                                  * combinations.
1671                                  */
1672                                 field->rmf_offset[i][j] = k + 1;
1673                         }
1674                 }
1675         }
1676         return 0;
1677 }
1678 EXPORT_SYMBOL(req_layout_init);
1679
1680 void req_layout_fini(void)
1681 {
1682 }
1683 EXPORT_SYMBOL(req_layout_fini);
1684
1685 /**
1686  * Initializes the expected sizes of each RMF in a \a pill (\a rc_area) to -1.
1687  *
1688  * Actual/expected field sizes are set elsewhere in functions in this file:
1689  * req_capsule_init(), req_capsule_server_pack(), req_capsule_set_size() and
1690  * req_capsule_msg_size().  The \a rc_area information is used by.
1691  * ptlrpc_request_set_replen().
1692  */
1693 void req_capsule_init_area(struct req_capsule *pill)
1694 {
1695         int i;
1696
1697         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1698                 pill->rc_area[RCL_CLIENT][i] = -1;
1699                 pill->rc_area[RCL_SERVER][i] = -1;
1700         }
1701 }
1702 EXPORT_SYMBOL(req_capsule_init_area);
1703
1704 /**
1705  * Initialize a pill.
1706  *
1707  * The \a location indicates whether the caller is executing on the client side
1708  * (RCL_CLIENT) or server side (RCL_SERVER)..
1709  */
1710 void req_capsule_init(struct req_capsule *pill,
1711                       struct ptlrpc_request *req,
1712                       enum req_location location)
1713 {
1714         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1715
1716         /*
1717          * Today all capsules are embedded in ptlrpc_request structs,
1718          * but just in case that ever isn't the case, we don't reach
1719          * into req unless req != NULL and pill is the one embedded in
1720          * the req.
1721          *
1722          * The req->rq_pill_init flag makes it safe to initialize a pill
1723          * twice, which might happen in the OST paths as a result of the
1724          * high-priority RPC queue getting peeked at before ost_handle()
1725          * handles an OST RPC.
1726          */
1727         if (req != NULL && pill == &req->rq_pill && req->rq_pill_init)
1728                 return;
1729
1730         memset(pill, 0, sizeof(*pill));
1731         pill->rc_req = req;
1732         pill->rc_loc = location;
1733         req_capsule_init_area(pill);
1734
1735         if (req != NULL && pill == &req->rq_pill)
1736                 req->rq_pill_init = 1;
1737 }
1738 EXPORT_SYMBOL(req_capsule_init);
1739
1740 void req_capsule_fini(struct req_capsule *pill)
1741 {
1742 }
1743 EXPORT_SYMBOL(req_capsule_fini);
1744
1745 static int __req_format_is_sane(const struct req_format *fmt)
1746 {
1747         return
1748                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1749                 req_formats[fmt->rf_idx] == fmt;
1750 }
1751
1752 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1753                                     enum req_location loc)
1754 {
1755         struct ptlrpc_request *req;
1756
1757         req = pill->rc_req;
1758         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1759 }
1760
1761 /**
1762  * Set the format (\a fmt) of a \a pill; format changes are not allowed here
1763  * (see req_capsule_extend()).
1764  */
1765 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1766 {
1767         LASSERT(pill->rc_fmt == NULL || pill->rc_fmt == fmt);
1768         LASSERT(__req_format_is_sane(fmt));
1769
1770         pill->rc_fmt = fmt;
1771 }
1772 EXPORT_SYMBOL(req_capsule_set);
1773
1774 /**
1775  * Fills in any parts of the \a rc_area of a \a pill that haven't been filled in
1776  * yet.
1777
1778  * \a rc_area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1779  * variable-sized fields.  The field sizes come from the declared \a rmf_size
1780  * field of a \a pill's \a rc_fmt's RMF's.
1781  */
1782 int req_capsule_filled_sizes(struct req_capsule *pill,
1783                            enum req_location loc)
1784 {
1785         const struct req_format *fmt = pill->rc_fmt;
1786         int                   i;
1787
1788         LASSERT(fmt != NULL);
1789
1790         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1791                 if (pill->rc_area[loc][i] == -1) {
1792                         pill->rc_area[loc][i] =
1793                                             fmt->rf_fields[loc].d[i]->rmf_size;
1794                         if (pill->rc_area[loc][i] == -1) {
1795                                 /*
1796                                  * Skip the following fields.
1797                                  *
1798                                  * If this LASSERT() trips then you're missing a
1799                                  * call to req_capsule_set_size().
1800                                  */
1801                                 LASSERT(loc != RCL_SERVER);
1802                                 break;
1803                         }
1804                 }
1805         }
1806         return i;
1807 }
1808 EXPORT_SYMBOL(req_capsule_filled_sizes);
1809
1810 /**
1811  * Capsule equivalent of lustre_pack_request() and lustre_pack_reply().
1812  *
1813  * This function uses the \a pill's \a rc_area as filled in by
1814  * req_capsule_set_size() or req_capsule_filled_sizes() (the latter is called by
1815  * this function).
1816  */
1817 int req_capsule_server_pack(struct req_capsule *pill)
1818 {
1819         const struct req_format *fmt;
1820         int                   count;
1821         int                   rc;
1822
1823         LASSERT(pill->rc_loc == RCL_SERVER);
1824         fmt = pill->rc_fmt;
1825         LASSERT(fmt != NULL);
1826
1827         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1828         rc = lustre_pack_reply(pill->rc_req, count,
1829                                pill->rc_area[RCL_SERVER], NULL);
1830         if (rc != 0) {
1831                 DEBUG_REQ(D_ERROR, pill->rc_req,
1832                        "Cannot pack %d fields in format `%s': ",
1833                        count, fmt->rf_name);
1834         }
1835         return rc;
1836 }
1837 EXPORT_SYMBOL(req_capsule_server_pack);
1838
1839 /**
1840  * Returns the PTLRPC request or reply (\a loc) buffer offset of a \a pill
1841  * corresponding to the given RMF (\a field).
1842  */
1843 static int __req_capsule_offset(const struct req_capsule *pill,
1844                                 const struct req_msg_field *field,
1845                                 enum req_location loc)
1846 {
1847         int offset;
1848
1849         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1850         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1851                             pill->rc_fmt->rf_name,
1852                             field->rmf_name, offset, loc);
1853         offset --;
1854
1855         LASSERT(0 <= offset && offset < REQ_MAX_FIELD_NR);
1856         return offset;
1857 }
1858
1859 /**
1860  * Helper for __req_capsule_get(); swabs value / array of values and/or dumps
1861  * them if desired.
1862  */
1863 static
1864 void
1865 swabber_dumper_helper(struct req_capsule *pill,
1866                       const struct req_msg_field *field,
1867                       enum req_location loc,
1868                       int offset,
1869                       void *value, int len, int dump, void (*swabber)(void *))
1870 {
1871         void    *p;
1872         int     i;
1873         int     n;
1874         int     do_swab;
1875         int     inout = loc == RCL_CLIENT;
1876
1877         swabber = swabber ?: field->rmf_swabber;
1878
1879         if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
1880             swabber != NULL && value != NULL)
1881                 do_swab = 1;
1882         else
1883                 do_swab = 0;
1884
1885         if (!field->rmf_dumper)
1886                 dump = 0;
1887
1888         if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY)) {
1889                 if (dump) {
1890                         CDEBUG(D_RPCTRACE, "Dump of %sfield %s follows\n",
1891                                do_swab ? "unswabbed " : "", field->rmf_name);
1892                         field->rmf_dumper(value);
1893                 }
1894                 if (!do_swab)
1895                         return;
1896                 swabber(value);
1897                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1898                 if (dump) {
1899                         CDEBUG(D_RPCTRACE, "Dump of swabbed field %s "
1900                                "follows\n", field->rmf_name);
1901                         field->rmf_dumper(value);
1902                 }
1903
1904                 return;
1905         }
1906
1907         /*
1908          * We're swabbing an array; swabber() swabs a single array element, so
1909          * swab every element.
1910          */
1911         LASSERT((len % field->rmf_size) == 0);
1912         for (p = value, i = 0, n = len / field->rmf_size;
1913              i < n;
1914              i++, p += field->rmf_size) {
1915                 if (dump) {
1916                         CDEBUG(D_RPCTRACE, "Dump of %sarray field %s, "
1917                                "element %d follows\n",
1918                                do_swab ? "unswabbed " : "", field->rmf_name, i);
1919                         field->rmf_dumper(p);
1920                 }
1921                 if (!do_swab)
1922                         continue;
1923                 swabber(p);
1924                 if (dump) {
1925                         CDEBUG(D_RPCTRACE, "Dump of swabbed array field %s, "
1926                                "element %d follows\n", field->rmf_name, i);
1927                         field->rmf_dumper(value);
1928                 }
1929         }
1930         if (do_swab)
1931                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1932 }
1933
1934 /**
1935  * Returns the pointer to a PTLRPC request or reply (\a loc) buffer of a \a pill
1936  * corresponding to the given RMF (\a field).
1937  *
1938  * The buffer will be swabbed using the given \a swabber.  If \a swabber == NULL
1939  * then the \a rmf_swabber from the RMF will be used.  Soon there will be no
1940  * calls to __req_capsule_get() with a non-NULL \a swabber; \a swabber will then
1941  * be removed.  Fields with the \a RMF_F_STRUCT_ARRAY flag set will have each
1942  * element of the array swabbed.
1943  */
1944 static void *__req_capsule_get(struct req_capsule *pill,
1945                                const struct req_msg_field *field,
1946                                enum req_location loc,
1947                                void (*swabber)(void *),
1948                                int dump)
1949 {
1950         const struct req_format *fmt;
1951         struct lustre_msg       *msg;
1952         void                *value;
1953         int                   len;
1954         int                   offset;
1955
1956         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1957
1958         static const char *rcl_names[RCL_NR] = {
1959                 [RCL_CLIENT] = "client",
1960                 [RCL_SERVER] = "server"
1961         };
1962
1963         LASSERT(pill != NULL);
1964         LASSERT(pill != LP_POISON);
1965         fmt = pill->rc_fmt;
1966         LASSERT(fmt != NULL);
1967         LASSERT(fmt != LP_POISON);
1968         LASSERT(__req_format_is_sane(fmt));
1969
1970         offset = __req_capsule_offset(pill, field, loc);
1971
1972         msg = __req_msg(pill, loc);
1973         LASSERT(msg != NULL);
1974
1975         getter = (field->rmf_flags & RMF_F_STRING) ?
1976                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1977
1978         if (field->rmf_flags & RMF_F_STRUCT_ARRAY) {
1979                 /*
1980                  * We've already asserted that field->rmf_size > 0 in
1981                  * req_layout_init().
1982                  */
1983                 len = lustre_msg_buflen(msg, offset);
1984                 if ((len % field->rmf_size) != 0) {
1985                         CERROR("%s: array field size mismatch "
1986                                "%d modulo %d != 0 (%d)\n",
1987                                field->rmf_name, len, field->rmf_size, loc);
1988                         return NULL;
1989                 }
1990         } else if (pill->rc_area[loc][offset] != -1) {
1991                 len = pill->rc_area[loc][offset];
1992         } else {
1993                 len = max(field->rmf_size, 0);
1994         }
1995         value = getter(msg, offset, len);
1996
1997         if (value == NULL) {
1998                 DEBUG_REQ(D_ERROR, pill->rc_req,
1999                           "Wrong buffer for field `%s' (%d of %d) "
2000                           "in format `%s': %d vs. %d (%s)\n",
2001                           field->rmf_name, offset, lustre_msg_bufcount(msg),
2002                           fmt->rf_name, lustre_msg_buflen(msg, offset), len,
2003                           rcl_names[loc]);
2004         } else {
2005                 swabber_dumper_helper(pill, field, loc, offset, value, len,
2006                                       dump, swabber);
2007         }
2008
2009         return value;
2010 }
2011
2012 /**
2013  * Dump a request and/or reply
2014  */
2015 void __req_capsule_dump(struct req_capsule *pill, enum req_location loc)
2016 {
2017         const struct    req_format *fmt;
2018         const struct    req_msg_field *field;
2019         int          len;
2020         int          i;
2021
2022         fmt = pill->rc_fmt;
2023
2024         DEBUG_REQ(D_RPCTRACE, pill->rc_req, "BEGIN REQ CAPSULE DUMP\n");
2025         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
2026                 field = FMT_FIELD(fmt, loc, i);
2027                 if (field->rmf_dumper == NULL) {
2028                         /*
2029                          * FIXME Add a default hex dumper for fields that don't
2030                          * have a specific dumper
2031                          */
2032                         len = req_capsule_get_size(pill, field, loc);
2033                         CDEBUG(D_RPCTRACE, "Field %s has no dumper function;"
2034                                "field size is %d\n", field->rmf_name, len);
2035                 } else {
2036                         /* It's the dumping side-effect that we're interested in */
2037                         (void) __req_capsule_get(pill, field, loc, NULL, 1);
2038                 }
2039         }
2040         CDEBUG(D_RPCTRACE, "END REQ CAPSULE DUMP\n");
2041 }
2042
2043 /**
2044  * Dump a request.
2045  */
2046 void req_capsule_client_dump(struct req_capsule *pill)
2047 {
2048         __req_capsule_dump(pill, RCL_CLIENT);
2049 }
2050 EXPORT_SYMBOL(req_capsule_client_dump);
2051
2052 /**
2053  * Dump a reply
2054  */
2055 void req_capsule_server_dump(struct req_capsule *pill)
2056 {
2057         __req_capsule_dump(pill, RCL_SERVER);
2058 }
2059 EXPORT_SYMBOL(req_capsule_server_dump);
2060
2061 /**
2062  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC request
2063  * buffer corresponding to the given RMF (\a field) of a \a pill.
2064  */
2065 void *req_capsule_client_get(struct req_capsule *pill,
2066                              const struct req_msg_field *field)
2067 {
2068         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
2069 }
2070 EXPORT_SYMBOL(req_capsule_client_get);
2071
2072 /**
2073  * Same as req_capsule_client_get(), but with a \a swabber argument.
2074  *
2075  * Currently unused; will be removed when req_capsule_server_swab_get() is
2076  * unused too.
2077  */
2078 void *req_capsule_client_swab_get(struct req_capsule *pill,
2079                                   const struct req_msg_field *field,
2080                                   void *swabber)
2081 {
2082         return __req_capsule_get(pill, field, RCL_CLIENT, swabber, 0);
2083 }
2084 EXPORT_SYMBOL(req_capsule_client_swab_get);
2085
2086 /**
2087  * Utility that combines req_capsule_set_size() and req_capsule_client_get().
2088  *
2089  * First the \a pill's request \a field's size is set (\a rc_area) using
2090  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2091  * returned.
2092  */
2093 void *req_capsule_client_sized_get(struct req_capsule *pill,
2094                                    const struct req_msg_field *field,
2095                                    int len)
2096 {
2097         req_capsule_set_size(pill, field, RCL_CLIENT, len);
2098         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
2099 }
2100 EXPORT_SYMBOL(req_capsule_client_sized_get);
2101
2102 /**
2103  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC reply
2104  * buffer corresponding to the given RMF (\a field) of a \a pill.
2105  */
2106 void *req_capsule_server_get(struct req_capsule *pill,
2107                              const struct req_msg_field *field)
2108 {
2109         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
2110 }
2111 EXPORT_SYMBOL(req_capsule_server_get);
2112
2113 /**
2114  * Same as req_capsule_server_get(), but with a \a swabber argument.
2115  *
2116  * Ideally all swabbing should be done pursuant to RMF definitions, with no
2117  * swabbing done outside this capsule abstraction.
2118  */
2119 void *req_capsule_server_swab_get(struct req_capsule *pill,
2120                                   const struct req_msg_field *field,
2121                                   void *swabber)
2122 {
2123         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
2124 }
2125 EXPORT_SYMBOL(req_capsule_server_swab_get);
2126
2127 /**
2128  * Utility that combines req_capsule_set_size() and req_capsule_server_get().
2129  *
2130  * First the \a pill's request \a field's size is set (\a rc_area) using
2131  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2132  * returned.
2133  */
2134 void *req_capsule_server_sized_get(struct req_capsule *pill,
2135                                    const struct req_msg_field *field,
2136                                    int len)
2137 {
2138         req_capsule_set_size(pill, field, RCL_SERVER, len);
2139         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
2140 }
2141 EXPORT_SYMBOL(req_capsule_server_sized_get);
2142
2143 void *req_capsule_server_sized_swab_get(struct req_capsule *pill,
2144                                         const struct req_msg_field *field,
2145                                         int len, void *swabber)
2146 {
2147         req_capsule_set_size(pill, field, RCL_SERVER, len);
2148         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
2149 }
2150 EXPORT_SYMBOL(req_capsule_server_sized_swab_get);
2151
2152 /**
2153  * Returns the buffer of a \a pill corresponding to the given \a field from the
2154  * request (if the caller is executing on the server-side) or reply (if the
2155  * caller is executing on the client-side).
2156  *
2157  * This function convienient for use is code that could be executed on the
2158  * client and server alike.
2159  */
2160 const void *req_capsule_other_get(struct req_capsule *pill,
2161                                   const struct req_msg_field *field)
2162 {
2163         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL, 0);
2164 }
2165 EXPORT_SYMBOL(req_capsule_other_get);
2166
2167 /**
2168  * Set the size of the PTLRPC request/reply (\a loc) buffer for the given \a
2169  * field of the given \a pill.
2170  *
2171  * This function must be used when constructing variable sized fields of a
2172  * request or reply.
2173  */
2174 void req_capsule_set_size(struct req_capsule *pill,
2175                           const struct req_msg_field *field,
2176                           enum req_location loc, int size)
2177 {
2178         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2179
2180         if ((size != field->rmf_size) &&
2181             (field->rmf_size != -1) &&
2182             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
2183             (size > 0)) {
2184                 if ((field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2185                     (size % field->rmf_size != 0)) {
2186                         CERROR("%s: array field size mismatch "
2187                                "%d %% %d != 0 (%d)\n",
2188                                field->rmf_name, size, field->rmf_size, loc);
2189                         LBUG();
2190                 } else if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2191                     size < field->rmf_size) {
2192                         CERROR("%s: field size mismatch %d != %d (%d)\n",
2193                                field->rmf_name, size, field->rmf_size, loc);
2194                         LBUG();
2195                 }
2196         }
2197
2198         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
2199 }
2200 EXPORT_SYMBOL(req_capsule_set_size);
2201
2202 /**
2203  * Return the actual PTLRPC buffer length of a request or reply (\a loc)
2204  * for the given \a pill's given \a field.
2205  *
2206  * NB: this function doesn't correspond with req_capsule_set_size(), which
2207  * actually sets the size in pill.rc_area[loc][offset], but this function
2208  * returns the message buflen[offset], maybe we should use another name.
2209  */
2210 int req_capsule_get_size(const struct req_capsule *pill,
2211                          const struct req_msg_field *field,
2212                          enum req_location loc)
2213 {
2214         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2215
2216         return lustre_msg_buflen(__req_msg(pill, loc),
2217                                  __req_capsule_offset(pill, field, loc));
2218 }
2219 EXPORT_SYMBOL(req_capsule_get_size);
2220
2221 /**
2222  * Wrapper around lustre_msg_size() that returns the PTLRPC size needed for the
2223  * given \a pill's request or reply (\a loc) given the field size recorded in
2224  * the \a pill's rc_area.
2225  *
2226  * See also req_capsule_set_size().
2227  */
2228 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
2229 {
2230         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
2231                                pill->rc_fmt->rf_fields[loc].nr,
2232                                pill->rc_area[loc]);
2233 }
2234
2235 /**
2236  * While req_capsule_msg_size() computes the size of a PTLRPC request or reply
2237  * (\a loc) given a \a pill's \a rc_area, this function computes the size of a
2238  * PTLRPC request or reply given only an RQF (\a fmt).
2239  *
2240  * This function should not be used for formats which contain variable size
2241  * fields.
2242  */
2243 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
2244                          enum req_location loc)
2245 {
2246         int size, i = 0;
2247
2248         /*
2249          * This function should probably LASSERT() that fmt has no fields with
2250          * RMF_F_STRUCT_ARRAY in rmf_flags, since we can't know here how many
2251          * elements in the array there will ultimately be, but then, we could
2252          * assume that there will be at least one element, and that's just what
2253          * we do.
2254          */
2255         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
2256         if (size < 0)
2257                 return size;
2258
2259         for (; i < fmt->rf_fields[loc].nr; ++i)
2260                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
2261                         size += cfs_size_round(fmt->rf_fields[loc].d[i]->
2262                                                rmf_size);
2263         return size;
2264 }
2265
2266 /**
2267  * Changes the format of an RPC.
2268  *
2269  * The pill must already have been initialized, which means that it already has
2270  * a request format.  The new format \a fmt must be an extension of the pill's
2271  * old format.  Specifically: the new format must have as many request and reply
2272  * fields as the old one, and all fields shared by the old and new format must
2273  * be at least as large in the new format.
2274  *
2275  * The new format's fields may be of different "type" than the old format, but
2276  * only for fields that are "opaque" blobs: fields which have a) have no
2277  * \a rmf_swabber, b) \a rmf_flags == 0 or RMF_F_NO_SIZE_CHECK, and c) \a
2278  * rmf_size == -1 or \a rmf_flags == RMF_F_NO_SIZE_CHECK.  For example,
2279  * OBD_SET_INFO has a key field and an opaque value field that gets interpreted
2280  * according to the key field.  When the value, according to the key, contains a
2281  * structure (or array thereof) to be swabbed, the format should be changed to
2282  * one where the value field has \a rmf_size/rmf_flags/rmf_swabber set
2283  * accordingly.
2284  */
2285 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
2286 {
2287         int i;
2288         int j;
2289
2290         const struct req_format *old;
2291
2292         LASSERT(pill->rc_fmt != NULL);
2293         LASSERT(__req_format_is_sane(fmt));
2294
2295         old = pill->rc_fmt;
2296         /*
2297          * Sanity checking...
2298          */
2299         for (i = 0; i < RCL_NR; ++i) {
2300                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
2301                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
2302                         const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
2303
2304                         /* "opaque" fields can be transmogrified */
2305                         if (ofield->rmf_swabber == NULL &&
2306                             (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
2307                             (ofield->rmf_size == -1 ||
2308                             ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
2309                                 continue;
2310                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
2311                 }
2312                 /*
2313                  * Last field in old format can be shorter than in new.
2314                  */
2315                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
2316                         FMT_FIELD(old, i, j)->rmf_size);
2317         }
2318
2319         pill->rc_fmt = fmt;
2320 }
2321 EXPORT_SYMBOL(req_capsule_extend);
2322
2323 /**
2324  * This function returns a non-zero value if the given \a field is present in
2325  * the format (\a rc_fmt) of \a pill's PTLRPC request or reply (\a loc), else it
2326  * returns 0.
2327  */
2328 int req_capsule_has_field(const struct req_capsule *pill,
2329                           const struct req_msg_field *field,
2330                           enum req_location loc)
2331 {
2332         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2333
2334         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
2335 }
2336 EXPORT_SYMBOL(req_capsule_has_field);
2337
2338 /**
2339  * Returns a non-zero value if the given \a field is present in the given \a
2340  * pill's PTLRPC request or reply (\a loc), else it returns 0.
2341  */
2342 int req_capsule_field_present(const struct req_capsule *pill,
2343                               const struct req_msg_field *field,
2344                               enum req_location loc)
2345 {
2346         int offset;
2347
2348         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2349         LASSERT(req_capsule_has_field(pill, field, loc));
2350
2351         offset = __req_capsule_offset(pill, field, loc);
2352         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
2353 }
2354 EXPORT_SYMBOL(req_capsule_field_present);
2355
2356 /**
2357  * This function shrinks the size of the _buffer_ of the \a pill's PTLRPC
2358  * request or reply (\a loc).
2359  *
2360  * This is not the opposite of req_capsule_extend().
2361  */
2362 void req_capsule_shrink(struct req_capsule *pill,
2363                         const struct req_msg_field *field,
2364                         unsigned int newlen,
2365                         enum req_location loc)
2366 {
2367         const struct req_format *fmt;
2368         struct lustre_msg       *msg;
2369         int                   len;
2370         int                   offset;
2371
2372         fmt = pill->rc_fmt;
2373         LASSERT(fmt != NULL);
2374         LASSERT(__req_format_is_sane(fmt));
2375         LASSERT(req_capsule_has_field(pill, field, loc));
2376         LASSERT(req_capsule_field_present(pill, field, loc));
2377
2378         offset = __req_capsule_offset(pill, field, loc);
2379
2380         msg = __req_msg(pill, loc);
2381         len = lustre_msg_buflen(msg, offset);
2382         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
2383                                 fmt->rf_name, field->rmf_name, len, newlen);
2384
2385         if (loc == RCL_CLIENT)
2386                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
2387                                                             1);
2388         else
2389                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
2390                                                             1);
2391 }
2392 EXPORT_SYMBOL(req_capsule_shrink);
2393
2394 int req_capsule_server_grow(struct req_capsule *pill,
2395                             const struct req_msg_field *field,
2396                             unsigned int newlen)
2397 {
2398         struct ptlrpc_reply_state *rs = pill->rc_req->rq_reply_state, *nrs;
2399         char *from, *to;
2400         int offset, len, rc;
2401
2402         LASSERT(pill->rc_fmt != NULL);
2403         LASSERT(__req_format_is_sane(pill->rc_fmt));
2404         LASSERT(req_capsule_has_field(pill, field, RCL_SERVER));
2405         LASSERT(req_capsule_field_present(pill, field, RCL_SERVER));
2406
2407         len = req_capsule_get_size(pill, field, RCL_SERVER);
2408         offset = __req_capsule_offset(pill, field, RCL_SERVER);
2409         if (pill->rc_req->rq_repbuf_len >=
2410             lustre_packed_msg_size(pill->rc_req->rq_repmsg) - len + newlen)
2411                 CERROR("Inplace repack might be done\n");
2412
2413         pill->rc_req->rq_reply_state = NULL;
2414         req_capsule_set_size(pill, field, RCL_SERVER, newlen);
2415         rc = req_capsule_server_pack(pill);
2416         if (rc) {
2417                 /* put old rs back, the caller will decide what to do */
2418                 pill->rc_req->rq_reply_state = rs;
2419                 return rc;
2420         }
2421         nrs = pill->rc_req->rq_reply_state;
2422         /* Now we need only buffers, copy first chunk */
2423         to = lustre_msg_buf(nrs->rs_msg, 0, 0);
2424         from = lustre_msg_buf(rs->rs_msg, 0, 0);
2425         len = (char *)lustre_msg_buf(rs->rs_msg, offset, 0) - from;
2426         memcpy(to, from, len);
2427         /* check if we have tail and copy it too */
2428         if (rs->rs_msg->lm_bufcount > offset + 1) {
2429                 to = lustre_msg_buf(nrs->rs_msg, offset + 1, 0);
2430                 from = lustre_msg_buf(rs->rs_msg, offset + 1, 0);
2431                 offset = rs->rs_msg->lm_bufcount - 1;
2432                 len = (char *)lustre_msg_buf(rs->rs_msg, offset, 0) +
2433                       cfs_size_round(rs->rs_msg->lm_buflens[offset]) - from;
2434                 memcpy(to, from, len);
2435         }
2436         /* drop old reply if everything is fine */
2437         if (rs->rs_difficult) {
2438                 /* copy rs data */
2439                 int i;
2440
2441                 nrs->rs_difficult = 1;
2442                 nrs->rs_no_ack = rs->rs_no_ack;
2443                 for (i = 0; i < rs->rs_nlocks; i++) {
2444                         nrs->rs_locks[i] = rs->rs_locks[i];
2445                         nrs->rs_modes[i] = rs->rs_modes[i];
2446                         nrs->rs_nlocks++;
2447                 }
2448                 rs->rs_nlocks = 0;
2449                 rs->rs_difficult = 0;
2450                 rs->rs_no_ack = 0;
2451         }
2452         ptlrpc_rs_decref(rs);
2453         return 0;
2454 }
2455 EXPORT_SYMBOL(req_capsule_server_grow);
2456 /* __REQ_LAYOUT_USER__ */
2457 #endif