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, 2013, 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 #ifdef __KERNEL__
  54 #include <linux/module.h>
  55 #else
  56 # include <liblustre.h>
  57 #endif
  58
  59 /* LUSTRE_VERSION_CODE */
  60 #include <lustre_ver.h>
  61
  62 #include <obd_support.h>
  63 /* lustre_swab_mdt_body */
  64 #include <lustre/lustre_idl.h>
  65 /* obd2cli_tgt() (required by DEBUG_REQ()) */
  66 #include <obd.h>
  67 #include <lustre_debug.h>
  68 #include <lustre_update.h>
  69 #endif /* !__REQ_LAYOUT_USER__ */
  70
  71 /* struct ptlrpc_request, lustre_msg* */
  72 #include <lustre_req_layout.h>
  73 #include <lustre_acl.h>
  74
  75 /*
  76  * RQFs (see below) refer to two struct req_msg_field arrays describing the
  77  * client request and server reply, respectively.
  78  */
  79 /* empty set of fields... for suitable definition of emptiness. */
  80 static const struct req_msg_field *empty[] = {
  81         &RMF_PTLRPC_BODY
  82 };
  83
  84 static const struct req_msg_field *mgs_target_info_only[] = {
  85         &RMF_PTLRPC_BODY,
  86         &RMF_MGS_TARGET_INFO
  87 };
  88
  89 static const struct req_msg_field *mgs_set_info[] = {
  90         &RMF_PTLRPC_BODY,
  91         &RMF_MGS_SEND_PARAM
  92 };
  93
  94 static const struct req_msg_field *mgs_config_read_client[] = {
  95         &RMF_PTLRPC_BODY,
  96         &RMF_MGS_CONFIG_BODY
  97 };
  98
  99 static const struct req_msg_field *mgs_config_read_server[] = {
 100         &RMF_PTLRPC_BODY,
 101         &RMF_MGS_CONFIG_RES
 102 };
 103
 104 static const struct req_msg_field *log_cancel_client[] = {
 105         &RMF_PTLRPC_BODY,
 106         &RMF_LOGCOOKIES
 107 };
 108
 109 static const struct req_msg_field *mdt_body_only[] = {
 110         &RMF_PTLRPC_BODY,
 111         &RMF_MDT_BODY
 112 };
 113
 114 static const struct req_msg_field *mdt_body_capa[] = {
 115         &RMF_PTLRPC_BODY,
 116         &RMF_MDT_BODY,
 117         &RMF_CAPA1
 118 };
 119
 120 static const struct req_msg_field *quotactl_only[] = {
 121         &RMF_PTLRPC_BODY,
 122         &RMF_OBD_QUOTACTL
 123 };
 124
 125 static const struct req_msg_field *quota_body_only[] = {
 126         &RMF_PTLRPC_BODY,
 127         &RMF_QUOTA_BODY
 128 };
 129
 130 static const struct req_msg_field *ldlm_intent_quota_client[] = {
 131         &RMF_PTLRPC_BODY,
 132         &RMF_DLM_REQ,
 133         &RMF_LDLM_INTENT,
 134         &RMF_QUOTA_BODY
 135 };
 136
 137 static const struct req_msg_field *ldlm_intent_quota_server[] = {
 138         &RMF_PTLRPC_BODY,
 139         &RMF_DLM_REP,
 140         &RMF_DLM_LVB,
 141         &RMF_QUOTA_BODY
 142 };
 143
 144 static const struct req_msg_field *mdt_close_client[] = {
 145         &RMF_PTLRPC_BODY,
 146         &RMF_MDT_EPOCH,
 147         &RMF_REC_REINT,
 148         &RMF_CAPA1
 149 };
 150
 151 static const struct req_msg_field *mdt_release_close_client[] = {
 152         &RMF_PTLRPC_BODY,
 153         &RMF_MDT_EPOCH,
 154         &RMF_REC_REINT,
 155         &RMF_CAPA1,
 156         &RMF_CLOSE_DATA
 157 };
 158
 159 static const struct req_msg_field *obd_statfs_server[] = {
 160         &RMF_PTLRPC_BODY,
 161         &RMF_OBD_STATFS
 162 };
 163
 164 static const struct req_msg_field *seq_query_client[] = {
 165         &RMF_PTLRPC_BODY,
 166         &RMF_SEQ_OPC,
 167         &RMF_SEQ_RANGE
 168 };
 169
 170 static const struct req_msg_field *seq_query_server[] = {
 171         &RMF_PTLRPC_BODY,
 172         &RMF_SEQ_RANGE
 173 };
 174
 175 static const struct req_msg_field *fld_query_client[] = {
 176         &RMF_PTLRPC_BODY,
 177         &RMF_FLD_OPC,
 178         &RMF_FLD_MDFLD
 179 };
 180
 181 static const struct req_msg_field *fld_query_server[] = {
 182         &RMF_PTLRPC_BODY,
 183         &RMF_FLD_MDFLD
 184 };
 185
 186 static const struct req_msg_field *fld_read_client[] = {
 187         &RMF_PTLRPC_BODY,
 188         &RMF_FLD_MDFLD
 189 };
 190
 191 static const struct req_msg_field *fld_read_server[] = {
 192         &RMF_PTLRPC_BODY,
 193         &RMF_GENERIC_DATA
 194 };
 195
 196 static const struct req_msg_field *mds_getattr_name_client[] = {
 197         &RMF_PTLRPC_BODY,
 198         &RMF_MDT_BODY,
 199         &RMF_CAPA1,
 200         &RMF_NAME
 201 };
 202
 203 static const struct req_msg_field *mds_reint_client[] = {
 204         &RMF_PTLRPC_BODY,
 205         &RMF_REC_REINT
 206 };
 207
 208 static const struct req_msg_field *mds_reint_create_client[] = {
 209         &RMF_PTLRPC_BODY,
 210         &RMF_REC_REINT,
 211         &RMF_CAPA1,
 212         &RMF_NAME
 213 };
 214
 215 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 216         &RMF_PTLRPC_BODY,
 217         &RMF_REC_REINT,
 218         &RMF_CAPA1,
 219         &RMF_NAME,
 220         &RMF_EADATA,
 221         &RMF_DLM_REQ
 222 };
 223
 224 static const struct req_msg_field *mds_reint_create_rmt_acl_client[] = {
 225         &RMF_PTLRPC_BODY,
 226         &RMF_REC_REINT,
 227         &RMF_CAPA1,
 228         &RMF_NAME,
 229         &RMF_EADATA,
 230         &RMF_DLM_REQ
 231 };
 232
 233 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 234         &RMF_PTLRPC_BODY,
 235         &RMF_REC_REINT,
 236         &RMF_CAPA1,
 237         &RMF_NAME,
 238         &RMF_SYMTGT,
 239         &RMF_DLM_REQ
 240 };
 241
 242 static const struct req_msg_field *mds_reint_open_client[] = {
 243         &RMF_PTLRPC_BODY,
 244         &RMF_REC_REINT,
 245         &RMF_CAPA1,
 246         &RMF_CAPA2,
 247         &RMF_NAME,
 248         &RMF_EADATA
 249 };
 250
 251 static const struct req_msg_field *mds_reint_open_server[] = {
 252         &RMF_PTLRPC_BODY,
 253         &RMF_MDT_BODY,
 254         &RMF_MDT_MD,
 255         &RMF_ACL,
 256         &RMF_CAPA1,
 257         &RMF_CAPA2
 258 };
 259
 260 static const struct req_msg_field *mds_reint_unlink_client[] = {
 261         &RMF_PTLRPC_BODY,
 262         &RMF_REC_REINT,
 263         &RMF_CAPA1,
 264         &RMF_NAME,
 265         &RMF_DLM_REQ
 266 };
 267
 268 static const struct req_msg_field *mds_reint_link_client[] = {
 269         &RMF_PTLRPC_BODY,
 270         &RMF_REC_REINT,
 271         &RMF_CAPA1,
 272         &RMF_CAPA2,
 273         &RMF_NAME,
 274         &RMF_DLM_REQ
 275 };
 276
 277 static const struct req_msg_field *mds_reint_rename_client[] = {
 278         &RMF_PTLRPC_BODY,
 279         &RMF_REC_REINT,
 280         &RMF_CAPA1,
 281         &RMF_CAPA2,
 282         &RMF_NAME,
 283         &RMF_SYMTGT,
 284         &RMF_DLM_REQ
 285 };
 286
 287 static const struct req_msg_field *mds_last_unlink_server[] = {
 288         &RMF_PTLRPC_BODY,
 289         &RMF_MDT_BODY,
 290         &RMF_MDT_MD,
 291         &RMF_LOGCOOKIES,
 292         &RMF_CAPA1,
 293         &RMF_CAPA2
 294 };
 295
 296 static const struct req_msg_field *mds_reint_setattr_client[] = {
 297         &RMF_PTLRPC_BODY,
 298         &RMF_REC_REINT,
 299         &RMF_CAPA1,
 300         &RMF_MDT_EPOCH,
 301         &RMF_EADATA,
 302         &RMF_LOGCOOKIES,
 303         &RMF_DLM_REQ
 304 };
 305
 306 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 307         &RMF_PTLRPC_BODY,
 308         &RMF_REC_REINT,
 309         &RMF_CAPA1,
 310         &RMF_NAME,
 311         &RMF_EADATA,
 312         &RMF_DLM_REQ
 313 };
 314
 315 static const struct req_msg_field *mdt_swap_layouts[] = {
 316         &RMF_PTLRPC_BODY,
 317         &RMF_MDT_BODY,
 318         &RMF_SWAP_LAYOUTS,
 319         &RMF_CAPA1,
 320         &RMF_CAPA2,
 321         &RMF_DLM_REQ
 322 };
 323
 324 static const struct req_msg_field *obd_connect_client[] = {
 325         &RMF_PTLRPC_BODY,
 326         &RMF_TGTUUID,
 327         &RMF_CLUUID,
 328         &RMF_CONN,
 329         &RMF_CONNECT_DATA
 330 };
 331
 332 static const struct req_msg_field *obd_connect_server[] = {
 333         &RMF_PTLRPC_BODY,
 334         &RMF_CONNECT_DATA
 335 };
 336
 337 static const struct req_msg_field *obd_set_info_client[] = {
 338         &RMF_PTLRPC_BODY,
 339         &RMF_SETINFO_KEY,
 340         &RMF_SETINFO_VAL
 341 };
 342
 343 static const struct req_msg_field *ost_grant_shrink_client[] = {
 344         &RMF_PTLRPC_BODY,
 345         &RMF_SETINFO_KEY,
 346         &RMF_OST_BODY
 347 };
 348
 349 static const struct req_msg_field *mds_getinfo_client[] = {
 350         &RMF_PTLRPC_BODY,
 351         &RMF_GETINFO_KEY,
 352         &RMF_GETINFO_VALLEN
 353 };
 354
 355 static const struct req_msg_field *mds_getinfo_server[] = {
 356         &RMF_PTLRPC_BODY,
 357         &RMF_GETINFO_VAL,
 358 };
 359
 360 static const struct req_msg_field *ldlm_enqueue_client[] = {
 361         &RMF_PTLRPC_BODY,
 362         &RMF_DLM_REQ
 363 };
 364
 365 static const struct req_msg_field *ldlm_enqueue_server[] = {
 366         &RMF_PTLRPC_BODY,
 367         &RMF_DLM_REP
 368 };
 369
 370 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 371         &RMF_PTLRPC_BODY,
 372         &RMF_DLM_REP,
 373         &RMF_DLM_LVB
 374 };
 375
 376 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 377         &RMF_PTLRPC_BODY,
 378         &RMF_DLM_REQ,
 379         &RMF_DLM_LVB
 380 };
 381
 382 static const struct req_msg_field *ldlm_gl_callback_desc_client[] = {
 383         &RMF_PTLRPC_BODY,
 384         &RMF_DLM_REQ,
 385         &RMF_DLM_GL_DESC
 386 };
 387
 388 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 389         &RMF_PTLRPC_BODY,
 390         &RMF_DLM_LVB
 391 };
 392
 393 static const struct req_msg_field *ldlm_intent_basic_client[] = {
 394         &RMF_PTLRPC_BODY,
 395         &RMF_DLM_REQ,
 396         &RMF_LDLM_INTENT,
 397 };
 398
 399 static const struct req_msg_field *ldlm_intent_client[] = {
 400         &RMF_PTLRPC_BODY,
 401         &RMF_DLM_REQ,
 402         &RMF_LDLM_INTENT,
 403         &RMF_REC_REINT
 404 };
 405
 406 static const struct req_msg_field *ldlm_intent_server[] = {
 407         &RMF_PTLRPC_BODY,
 408         &RMF_DLM_REP,
 409         &RMF_MDT_BODY,
 410         &RMF_MDT_MD,
 411         &RMF_ACL
 412 };
 413
 414 static const struct req_msg_field *ldlm_intent_layout_client[] = {
 415         &RMF_PTLRPC_BODY,
 416         &RMF_DLM_REQ,
 417         &RMF_LDLM_INTENT,
 418         &RMF_LAYOUT_INTENT,
 419         &RMF_EADATA /* for new layout to be set up */
 420 };
 421 static const struct req_msg_field *ldlm_intent_open_server[] = {
 422         &RMF_PTLRPC_BODY,
 423         &RMF_DLM_REP,
 424         &RMF_MDT_BODY,
 425         &RMF_MDT_MD,
 426         &RMF_ACL,
 427         &RMF_CAPA1,
 428         &RMF_CAPA2
 429 };
 430
 431 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 432         &RMF_PTLRPC_BODY,
 433         &RMF_DLM_REQ,
 434         &RMF_LDLM_INTENT,
 435         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 436         &RMF_CAPA1,
 437         &RMF_NAME
 438 };
 439
 440 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 441         &RMF_PTLRPC_BODY,
 442         &RMF_DLM_REP,
 443         &RMF_MDT_BODY,
 444         &RMF_MDT_MD,
 445         &RMF_ACL,
 446         &RMF_CAPA1
 447 };
 448
 449 static const struct req_msg_field *ldlm_intent_create_client[] = {
 450         &RMF_PTLRPC_BODY,
 451         &RMF_DLM_REQ,
 452         &RMF_LDLM_INTENT,
 453         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 454         &RMF_CAPA1,
 455         &RMF_NAME,
 456         &RMF_EADATA
 457 };
 458
 459 static const struct req_msg_field *ldlm_intent_open_client[] = {
 460         &RMF_PTLRPC_BODY,
 461         &RMF_DLM_REQ,
 462         &RMF_LDLM_INTENT,
 463         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 464         &RMF_CAPA1,
 465         &RMF_CAPA2,
 466         &RMF_NAME,
 467         &RMF_EADATA
 468 };
 469
 470 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 471         &RMF_PTLRPC_BODY,
 472         &RMF_DLM_REQ,
 473         &RMF_LDLM_INTENT,
 474         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 475         &RMF_CAPA1,
 476         &RMF_NAME
 477 };
 478
 479 static const struct req_msg_field *ldlm_intent_getxattr_client[] = {
 480         &RMF_PTLRPC_BODY,
 481         &RMF_DLM_REQ,
 482         &RMF_LDLM_INTENT,
 483         &RMF_MDT_BODY,
 484         &RMF_CAPA1,
 485 };
 486
 487 static const struct req_msg_field *ldlm_intent_getxattr_server[] = {
 488         &RMF_PTLRPC_BODY,
 489         &RMF_DLM_REP,
 490         &RMF_MDT_BODY,
 491         &RMF_MDT_MD,
 492         &RMF_ACL, /* for req_capsule_extend/mdt_intent_policy */
 493         &RMF_EADATA,
 494         &RMF_EAVALS,
 495         &RMF_EAVALS_LENS
 496 };
 497
 498 static const struct req_msg_field *mds_getxattr_client[] = {
 499         &RMF_PTLRPC_BODY,
 500         &RMF_MDT_BODY,
 501         &RMF_CAPA1,
 502         &RMF_NAME,
 503         &RMF_EADATA
 504 };
 505
 506 static const struct req_msg_field *mds_getxattr_server[] = {
 507         &RMF_PTLRPC_BODY,
 508         &RMF_MDT_BODY,
 509         &RMF_EADATA
 510 };
 511
 512 static const struct req_msg_field *mds_getattr_server[] = {
 513         &RMF_PTLRPC_BODY,
 514         &RMF_MDT_BODY,
 515         &RMF_MDT_MD,
 516         &RMF_ACL,
 517         &RMF_CAPA1,
 518         &RMF_CAPA2
 519 };
 520
 521 static const struct req_msg_field *mds_setattr_server[] = {
 522         &RMF_PTLRPC_BODY,
 523         &RMF_MDT_BODY,
 524         &RMF_MDT_MD,
 525         &RMF_ACL,
 526         &RMF_CAPA1,
 527         &RMF_CAPA2
 528 };
 529
 530 static const struct req_msg_field *mds_update_client[] = {
 531         &RMF_PTLRPC_BODY,
 532         &RMF_OUT_UPDATE,
 533 };
 534
 535 static const struct req_msg_field *mds_update_server[] = {
 536         &RMF_PTLRPC_BODY,
 537         &RMF_OUT_UPDATE_REPLY,
 538 };
 539
 540 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 541         &RMF_PTLRPC_BODY,
 542         &RMF_LLOGD_BODY,
 543         &RMF_NAME
 544 };
 545
 546 static const struct req_msg_field *llogd_body_only[] = {
 547         &RMF_PTLRPC_BODY,
 548         &RMF_LLOGD_BODY
 549 };
 550
 551 static const struct req_msg_field *llog_log_hdr_only[] = {
 552         &RMF_PTLRPC_BODY,
 553         &RMF_LLOG_LOG_HDR
 554 };
 555
 556 static const struct req_msg_field *llogd_conn_body_only[] = {
 557         &RMF_PTLRPC_BODY,
 558         &RMF_LLOGD_CONN_BODY
 559 };
 560
 561 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 562         &RMF_PTLRPC_BODY,
 563         &RMF_LLOGD_BODY,
 564         &RMF_EADATA
 565 };
 566
 567 static const struct req_msg_field *obd_idx_read_client[] = {
 568         &RMF_PTLRPC_BODY,
 569         &RMF_IDX_INFO
 570 };
 571
 572 static const struct req_msg_field *obd_idx_read_server[] = {
 573         &RMF_PTLRPC_BODY,
 574         &RMF_IDX_INFO
 575 };
 576
 577 static const struct req_msg_field *ost_body_only[] = {
 578         &RMF_PTLRPC_BODY,
 579         &RMF_OST_BODY
 580 };
 581
 582 static const struct req_msg_field *ost_body_capa[] = {
 583         &RMF_PTLRPC_BODY,
 584         &RMF_OST_BODY,
 585         &RMF_CAPA1
 586 };
 587
 588 static const struct req_msg_field *ost_destroy_client[] = {
 589         &RMF_PTLRPC_BODY,
 590         &RMF_OST_BODY,
 591         &RMF_DLM_REQ,
 592         &RMF_CAPA1
 593 };
 594
 595
 596 static const struct req_msg_field *ost_brw_client[] = {
 597         &RMF_PTLRPC_BODY,
 598         &RMF_OST_BODY,
 599         &RMF_OBD_IOOBJ,
 600         &RMF_NIOBUF_REMOTE,
 601         &RMF_CAPA1
 602 };
 603
 604 static const struct req_msg_field *ost_brw_read_server[] = {
 605         &RMF_PTLRPC_BODY,
 606         &RMF_OST_BODY
 607 };
 608
 609 static const struct req_msg_field *ost_brw_write_server[] = {
 610         &RMF_PTLRPC_BODY,
 611         &RMF_OST_BODY,
 612         &RMF_RCS
 613 };
 614
 615 static const struct req_msg_field *ost_get_info_generic_server[] = {
 616         &RMF_PTLRPC_BODY,
 617         &RMF_GENERIC_DATA,
 618 };
 619
 620 static const struct req_msg_field *ost_get_info_generic_client[] = {
 621         &RMF_PTLRPC_BODY,
 622         &RMF_GETINFO_KEY
 623 };
 624
 625 static const struct req_msg_field *ost_get_last_id_server[] = {
 626         &RMF_PTLRPC_BODY,
 627         &RMF_OBD_ID
 628 };
 629
 630 static const struct req_msg_field *ost_get_last_fid_client[] = {
 631         &RMF_PTLRPC_BODY,
 632         &RMF_GETINFO_KEY,
 633         &RMF_FID,
 634 };
 635
 636 static const struct req_msg_field *ost_get_last_fid_server[] = {
 637         &RMF_PTLRPC_BODY,
 638         &RMF_FID,
 639 };
 640
 641 static const struct req_msg_field *ost_get_fiemap_client[] = {
 642         &RMF_PTLRPC_BODY,
 643         &RMF_FIEMAP_KEY,
 644         &RMF_FIEMAP_VAL
 645 };
 646
 647 static const struct req_msg_field *ost_get_fiemap_server[] = {
 648         &RMF_PTLRPC_BODY,
 649         &RMF_FIEMAP_VAL
 650 };
 651
 652 static const struct req_msg_field *mdt_hsm_progress[] = {
 653         &RMF_PTLRPC_BODY,
 654         &RMF_MDT_BODY,
 655         &RMF_MDS_HSM_PROGRESS,
 656 };
 657
 658 static const struct req_msg_field *mdt_hsm_ct_register[] = {
 659         &RMF_PTLRPC_BODY,
 660         &RMF_MDT_BODY,
 661         &RMF_MDS_HSM_ARCHIVE,
 662 };
 663
 664 static const struct req_msg_field *mdt_hsm_ct_unregister[] = {
 665         &RMF_PTLRPC_BODY,
 666         &RMF_MDT_BODY,
 667 };
 668
 669 static const struct req_msg_field *mdt_hsm_action_server[] = {
 670         &RMF_PTLRPC_BODY,
 671         &RMF_MDT_BODY,
 672         &RMF_MDS_HSM_CURRENT_ACTION,
 673 };
 674
 675 static const struct req_msg_field *mdt_hsm_state_get_server[] = {
 676         &RMF_PTLRPC_BODY,
 677         &RMF_MDT_BODY,
 678         &RMF_HSM_USER_STATE,
 679 };
 680
 681 static const struct req_msg_field *mdt_hsm_state_set[] = {
 682         &RMF_PTLRPC_BODY,
 683         &RMF_MDT_BODY,
 684         &RMF_CAPA1,
 685         &RMF_HSM_STATE_SET,
 686 };
 687
 688 static const struct req_msg_field *mdt_hsm_request[] = {
 689         &RMF_PTLRPC_BODY,
 690         &RMF_MDT_BODY,
 691         &RMF_MDS_HSM_REQUEST,
 692         &RMF_MDS_HSM_USER_ITEM,
 693         &RMF_GENERIC_DATA,
 694 };
 695
 696 static const struct req_msg_field *obd_lfsck_request[] = {
 697         &RMF_PTLRPC_BODY,
 698         &RMF_LFSCK_REQUEST,
 699 };
 700
 701 static const struct req_msg_field *obd_lfsck_reply[] = {
 702         &RMF_PTLRPC_BODY,
 703         &RMF_LFSCK_REPLY,
 704 };
 705
 706 static struct req_format *req_formats[] = {
 707         &RQF_OBD_PING,
 708         &RQF_OBD_SET_INFO,
 709         &RQF_OBD_IDX_READ,
 710         &RQF_SEC_CTX,
 711         &RQF_MGS_TARGET_REG,
 712         &RQF_MGS_SET_INFO,
 713         &RQF_MGS_CONFIG_READ,
 714         &RQF_SEQ_QUERY,
 715         &RQF_FLD_QUERY,
 716         &RQF_FLD_READ,
 717         &RQF_MDS_CONNECT,
 718         &RQF_MDS_DISCONNECT,
 719         &RQF_MDS_GET_INFO,
 720         &RQF_MDS_GETSTATUS,
 721         &RQF_MDS_STATFS,
 722         &RQF_MDS_GETATTR,
 723         &RQF_MDS_GETATTR_NAME,
 724         &RQF_MDS_GETXATTR,
 725         &RQF_MDS_SYNC,
 726         &RQF_MDS_CLOSE,
 727         &RQF_MDS_RELEASE_CLOSE,
 728         &RQF_MDS_READPAGE,
 729         &RQF_MDS_WRITEPAGE,
 730         &RQF_MDS_DONE_WRITING,
 731         &RQF_MDS_REINT,
 732         &RQF_MDS_REINT_CREATE,
 733         &RQF_MDS_REINT_CREATE_RMT_ACL,
 734         &RQF_MDS_REINT_CREATE_SLAVE,
 735         &RQF_MDS_REINT_CREATE_SYM,
 736         &RQF_MDS_REINT_OPEN,
 737         &RQF_MDS_REINT_UNLINK,
 738         &RQF_MDS_REINT_LINK,
 739         &RQF_MDS_REINT_RENAME,
 740         &RQF_MDS_REINT_SETATTR,
 741         &RQF_MDS_REINT_SETXATTR,
 742         &RQF_MDS_QUOTACHECK,
 743         &RQF_MDS_QUOTACTL,
 744         &RQF_MDS_HSM_PROGRESS,
 745         &RQF_MDS_HSM_CT_REGISTER,
 746         &RQF_MDS_HSM_CT_UNREGISTER,
 747         &RQF_MDS_HSM_STATE_GET,
 748         &RQF_MDS_HSM_STATE_SET,
 749         &RQF_MDS_HSM_ACTION,
 750         &RQF_MDS_HSM_REQUEST,
 751         &RQF_MDS_SWAP_LAYOUTS,
 752         &RQF_OUT_UPDATE,
 753         &RQF_QC_CALLBACK,
 754         &RQF_OST_CONNECT,
 755         &RQF_OST_DISCONNECT,
 756         &RQF_OST_QUOTACHECK,
 757         &RQF_OST_QUOTACTL,
 758         &RQF_OST_GETATTR,
 759         &RQF_OST_SETATTR,
 760         &RQF_OST_CREATE,
 761         &RQF_OST_PUNCH,
 762         &RQF_OST_SYNC,
 763         &RQF_OST_DESTROY,
 764         &RQF_OST_BRW_READ,
 765         &RQF_OST_BRW_WRITE,
 766         &RQF_OST_STATFS,
 767         &RQF_OST_SET_GRANT_INFO,
 768         &RQF_OST_GET_INFO,
 769         &RQF_OST_GET_INFO_LAST_ID,
 770         &RQF_OST_GET_INFO_LAST_FID,
 771         &RQF_OST_SET_INFO_LAST_FID,
 772         &RQF_OST_GET_INFO_FIEMAP,
 773         &RQF_LDLM_ENQUEUE,
 774         &RQF_LDLM_ENQUEUE_LVB,
 775         &RQF_LDLM_CONVERT,
 776         &RQF_LDLM_CANCEL,
 777         &RQF_LDLM_CALLBACK,
 778         &RQF_LDLM_CP_CALLBACK,
 779         &RQF_LDLM_BL_CALLBACK,
 780         &RQF_LDLM_GL_CALLBACK,
 781         &RQF_LDLM_GL_DESC_CALLBACK,
 782         &RQF_LDLM_INTENT,
 783         &RQF_LDLM_INTENT_BASIC,
 784         &RQF_LDLM_INTENT_LAYOUT,
 785         &RQF_LDLM_INTENT_GETATTR,
 786         &RQF_LDLM_INTENT_OPEN,
 787         &RQF_LDLM_INTENT_CREATE,
 788         &RQF_LDLM_INTENT_UNLINK,
 789         &RQF_LDLM_INTENT_GETXATTR,
 790         &RQF_LDLM_INTENT_QUOTA,
 791         &RQF_QUOTA_DQACQ,
 792         &RQF_LOG_CANCEL,
 793         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 794         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 795         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 796         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 797         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 798         &RQF_LLOG_ORIGIN_CONNECT,
 799         &RQF_CONNECT,
 800         &RQF_LFSCK_NOTIFY,
 801         &RQF_LFSCK_QUERY,
 802 };
 803
 804 struct req_msg_field {
 805         const __u32 rmf_flags;
 806         const char  *rmf_name;
 807         /**
 808          * Field length. (-1) means "variable length".  If the
 809          * \a RMF_F_STRUCT_ARRAY flag is set the field is also variable-length,
 810          * but the actual size must be a whole multiple of \a rmf_size.
 811          */
 812         const int   rmf_size;
 813         void        (*rmf_swabber)(void *);
 814         void        (*rmf_dumper)(void *);
 815         int         rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 816 };
 817
 818 enum rmf_flags {
 819         /**
 820          * The field is a string, must be NUL-terminated.
 821          */
 822         RMF_F_STRING = 1 << 0,
 823         /**
 824          * The field's buffer size need not match the declared \a rmf_size.
 825          */
 826         RMF_F_NO_SIZE_CHECK = 1 << 1,
 827         /**
 828          * The field's buffer size must be a whole multiple of the declared \a
 829          * rmf_size and the \a rmf_swabber function must work on the declared \a
 830          * rmf_size worth of bytes.
 831          */
 832         RMF_F_STRUCT_ARRAY = 1 << 2
 833 };
 834
 835 struct req_capsule;
 836
 837 /*
 838  * Request fields.
 839  */
 840 #define DEFINE_MSGF(name, flags, size, swabber, dumper) {       \
 841         .rmf_name    = (name),                                  \
 842         .rmf_flags   = (flags),                                 \
 843         .rmf_size    = (size),                                  \
 844         .rmf_swabber = (void (*)(void*))(swabber),              \
 845         .rmf_dumper  = (void (*)(void*))(dumper)                \
 846 }
 847
 848 struct req_msg_field RMF_GENERIC_DATA =
 849         DEFINE_MSGF("generic_data", 0,
 850                     -1, NULL, NULL);
 851 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 852
 853 struct req_msg_field RMF_MGS_TARGET_INFO =
 854         DEFINE_MSGF("mgs_target_info", 0,
 855                     sizeof(struct mgs_target_info),
 856                     lustre_swab_mgs_target_info, NULL);
 857 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 858
 859 struct req_msg_field RMF_MGS_SEND_PARAM =
 860         DEFINE_MSGF("mgs_send_param", 0,
 861                     sizeof(struct mgs_send_param),
 862                     NULL, NULL);
 863 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 864
 865 struct req_msg_field RMF_MGS_CONFIG_BODY =
 866         DEFINE_MSGF("mgs_config_read request", 0,
 867                     sizeof(struct mgs_config_body),
 868                     lustre_swab_mgs_config_body, NULL);
 869 EXPORT_SYMBOL(RMF_MGS_CONFIG_BODY);
 870
 871 struct req_msg_field RMF_MGS_CONFIG_RES =
 872         DEFINE_MSGF("mgs_config_read reply ", 0,
 873                     sizeof(struct mgs_config_res),
 874                     lustre_swab_mgs_config_res, NULL);
 875 EXPORT_SYMBOL(RMF_MGS_CONFIG_RES);
 876
 877 struct req_msg_field RMF_U32 =
 878         DEFINE_MSGF("generic u32", 0,
 879                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 880 EXPORT_SYMBOL(RMF_U32);
 881
 882 struct req_msg_field RMF_SETINFO_VAL =
 883         DEFINE_MSGF("setinfo_val", 0, -1, NULL, NULL);
 884 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 885
 886 struct req_msg_field RMF_GETINFO_KEY =
 887         DEFINE_MSGF("getinfo_key", 0, -1, NULL, NULL);
 888 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 889
 890 struct req_msg_field RMF_GETINFO_VALLEN =
 891         DEFINE_MSGF("getinfo_vallen", 0,
 892                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 893 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 894
 895 struct req_msg_field RMF_GETINFO_VAL =
 896         DEFINE_MSGF("getinfo_val", 0, -1, NULL, NULL);
 897 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 898
 899 struct req_msg_field RMF_SEQ_OPC =
 900         DEFINE_MSGF("seq_query_opc", 0,
 901                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 902 EXPORT_SYMBOL(RMF_SEQ_OPC);
 903
 904 struct req_msg_field RMF_SEQ_RANGE =
 905         DEFINE_MSGF("seq_query_range", 0,
 906                     sizeof(struct lu_seq_range),
 907                     lustre_swab_lu_seq_range, NULL);
 908 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 909
 910 struct req_msg_field RMF_FLD_OPC =
 911         DEFINE_MSGF("fld_query_opc", 0,
 912                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 913 EXPORT_SYMBOL(RMF_FLD_OPC);
 914
 915 struct req_msg_field RMF_FLD_MDFLD =
 916         DEFINE_MSGF("fld_query_mdfld", 0,
 917                     sizeof(struct lu_seq_range),
 918                     lustre_swab_lu_seq_range, NULL);
 919 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 920
 921 struct req_msg_field RMF_MDT_BODY =
 922         DEFINE_MSGF("mdt_body", 0,
 923                     sizeof(struct mdt_body), lustre_swab_mdt_body, NULL);
 924 EXPORT_SYMBOL(RMF_MDT_BODY);
 925
 926 struct req_msg_field RMF_OBD_QUOTACTL =
 927         DEFINE_MSGF("obd_quotactl", 0,
 928                     sizeof(struct obd_quotactl),
 929                     lustre_swab_obd_quotactl, NULL);
 930 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 931
 932 struct req_msg_field RMF_QUOTA_BODY =
 933         DEFINE_MSGF("quota_body", 0,
 934                     sizeof(struct quota_body), lustre_swab_quota_body, NULL);
 935 EXPORT_SYMBOL(RMF_QUOTA_BODY);
 936
 937 struct req_msg_field RMF_MDT_EPOCH =
 938         DEFINE_MSGF("mdt_ioepoch", 0,
 939                     sizeof(struct mdt_ioepoch), lustre_swab_mdt_ioepoch, NULL);
 940 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 941
 942 struct req_msg_field RMF_PTLRPC_BODY =
 943         DEFINE_MSGF("ptlrpc_body", 0,
 944                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body, NULL);
 945 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 946
 947 struct req_msg_field RMF_CLOSE_DATA =
 948         DEFINE_MSGF("data_version", 0,
 949                     sizeof(struct close_data), lustre_swab_close_data, NULL);
 950 EXPORT_SYMBOL(RMF_CLOSE_DATA);
 951
 952 struct req_msg_field RMF_OBD_STATFS =
 953         DEFINE_MSGF("obd_statfs", 0,
 954                     sizeof(struct obd_statfs), lustre_swab_obd_statfs, NULL);
 955 EXPORT_SYMBOL(RMF_OBD_STATFS);
 956
 957 struct req_msg_field RMF_SETINFO_KEY =
 958         DEFINE_MSGF("setinfo_key", 0, -1, NULL, NULL);
 959 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 960
 961 struct req_msg_field RMF_NAME =
 962         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL, NULL);
 963 EXPORT_SYMBOL(RMF_NAME);
 964
 965 struct req_msg_field RMF_SYMTGT =
 966         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL, NULL);
 967 EXPORT_SYMBOL(RMF_SYMTGT);
 968
 969 struct req_msg_field RMF_TGTUUID =
 970         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 971         NULL);
 972 EXPORT_SYMBOL(RMF_TGTUUID);
 973
 974 struct req_msg_field RMF_CLUUID =
 975         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 976         NULL);
 977 EXPORT_SYMBOL(RMF_CLUUID);
 978
 979 struct req_msg_field RMF_STRING =
 980         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL, NULL);
 981 EXPORT_SYMBOL(RMF_STRING);
 982
 983 struct req_msg_field RMF_LLOGD_BODY =
 984         DEFINE_MSGF("llogd_body", 0,
 985                     sizeof(struct llogd_body), lustre_swab_llogd_body, NULL);
 986 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 987
 988 struct req_msg_field RMF_LLOG_LOG_HDR =
 989         DEFINE_MSGF("llog_log_hdr", 0,
 990                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr, NULL);
 991 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 992
 993 struct req_msg_field RMF_LLOGD_CONN_BODY =
 994         DEFINE_MSGF("llogd_conn_body", 0,
 995                     sizeof(struct llogd_conn_body),
 996                     lustre_swab_llogd_conn_body, NULL);
 997 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 998
 999 /*
1000  * connection handle received in MDS_CONNECT request.
1001  *
1002  * No swabbing needed because struct lustre_handle contains only a 64-bit cookie
1003  * that the client does not interpret at all.
1004  */
1005 struct req_msg_field RMF_CONN =
1006         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL, NULL);
1007 EXPORT_SYMBOL(RMF_CONN);
1008
1009 struct req_msg_field RMF_CONNECT_DATA =
1010         DEFINE_MSGF("cdata",
1011                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
1012 #if LUSTRE_VERSION_CODE > OBD_OCD_VERSION(2, 7, 50, 0)
1013                     sizeof(struct obd_connect_data),
1014 #else
1015 /* For interoperability with 1.8 and 2.0 clients/servers.
1016  * The RPC verification code allows larger RPC buffers, but not
1017  * smaller buffers.  Until we no longer need to keep compatibility
1018  * with older servers/clients we can only check that the buffer
1019  * size is at least as large as obd_connect_data_v1.  That is not
1020  * not in itself harmful, since the chance of just corrupting this
1021  * field is low.  See JIRA LU-16 for details. */
1022                     sizeof(struct obd_connect_data_v1),
1023 #endif
1024                     lustre_swab_connect, NULL);
1025 EXPORT_SYMBOL(RMF_CONNECT_DATA);
1026
1027 struct req_msg_field RMF_DLM_REQ =
1028         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
1029                     sizeof(struct ldlm_request),
1030                     lustre_swab_ldlm_request, NULL);
1031 EXPORT_SYMBOL(RMF_DLM_REQ);
1032
1033 struct req_msg_field RMF_DLM_REP =
1034         DEFINE_MSGF("dlm_rep", 0,
1035                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply, NULL);
1036 EXPORT_SYMBOL(RMF_DLM_REP);
1037
1038 struct req_msg_field RMF_LDLM_INTENT =
1039         DEFINE_MSGF("ldlm_intent", 0,
1040                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent, NULL);
1041 EXPORT_SYMBOL(RMF_LDLM_INTENT);
1042
1043 struct req_msg_field RMF_DLM_LVB =
1044         DEFINE_MSGF("dlm_lvb", 0, -1, NULL, NULL);
1045 EXPORT_SYMBOL(RMF_DLM_LVB);
1046
1047 struct req_msg_field RMF_DLM_GL_DESC =
1048         DEFINE_MSGF("dlm_gl_desc", 0, sizeof(union ldlm_gl_desc),
1049                     lustre_swab_gl_desc, NULL);
1050 EXPORT_SYMBOL(RMF_DLM_GL_DESC);
1051
1052 struct req_msg_field RMF_MDT_MD =
1053         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL, NULL);
1054 EXPORT_SYMBOL(RMF_MDT_MD);
1055
1056 struct req_msg_field RMF_REC_REINT =
1057         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
1058                     lustre_swab_mdt_rec_reint, NULL);
1059 EXPORT_SYMBOL(RMF_REC_REINT);
1060
1061 /* FIXME: this length should be defined as a macro */
1062 struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1,
1063                                                     NULL, NULL);
1064 EXPORT_SYMBOL(RMF_EADATA);
1065
1066 struct req_msg_field RMF_EAVALS = DEFINE_MSGF("eavals", 0, -1, NULL, NULL);
1067 EXPORT_SYMBOL(RMF_EAVALS);
1068
1069 struct req_msg_field RMF_ACL =
1070         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
1071                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL, NULL);
1072 EXPORT_SYMBOL(RMF_ACL);
1073
1074 /* FIXME: this should be made to use RMF_F_STRUCT_ARRAY */
1075 struct req_msg_field RMF_LOGCOOKIES =
1076         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
1077                     sizeof(struct llog_cookie), NULL, NULL);
1078 EXPORT_SYMBOL(RMF_LOGCOOKIES);
1079
1080 struct req_msg_field RMF_CAPA1 =
1081         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1082                     lustre_swab_lustre_capa, NULL);
1083 EXPORT_SYMBOL(RMF_CAPA1);
1084
1085 struct req_msg_field RMF_CAPA2 =
1086         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1087                     lustre_swab_lustre_capa, NULL);
1088 EXPORT_SYMBOL(RMF_CAPA2);
1089
1090 struct req_msg_field RMF_LAYOUT_INTENT =
1091         DEFINE_MSGF("layout_intent", 0,
1092                     sizeof(struct layout_intent), lustre_swab_layout_intent,
1093                     NULL);
1094 EXPORT_SYMBOL(RMF_LAYOUT_INTENT);
1095
1096 /*
1097  * OST request field.
1098  */
1099 struct req_msg_field RMF_OST_BODY =
1100         DEFINE_MSGF("ost_body", 0,
1101                     sizeof(struct ost_body), lustre_swab_ost_body, dump_ost_body);
1102 EXPORT_SYMBOL(RMF_OST_BODY);
1103
1104 struct req_msg_field RMF_OBD_IOOBJ =
1105         DEFINE_MSGF("obd_ioobj", RMF_F_STRUCT_ARRAY,
1106                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj, dump_ioo);
1107 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
1108
1109 struct req_msg_field RMF_NIOBUF_REMOTE =
1110         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY,
1111                     sizeof(struct niobuf_remote), lustre_swab_niobuf_remote,
1112                     dump_rniobuf);
1113 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
1114
1115 struct req_msg_field RMF_RCS =
1116         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1117                     lustre_swab_generic_32s, dump_rcs);
1118 EXPORT_SYMBOL(RMF_RCS);
1119
1120 struct req_msg_field RMF_EAVALS_LENS =
1121         DEFINE_MSGF("eavals_lens", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1122                 lustre_swab_generic_32s, NULL);
1123 EXPORT_SYMBOL(RMF_EAVALS_LENS);
1124
1125 struct req_msg_field RMF_OBD_ID =
1126         DEFINE_MSGF("obd_id", 0,
1127                     sizeof(obd_id), lustre_swab_ost_last_id, NULL);
1128 EXPORT_SYMBOL(RMF_OBD_ID);
1129
1130 struct req_msg_field RMF_FID =
1131         DEFINE_MSGF("fid", 0,
1132                     sizeof(struct lu_fid), lustre_swab_lu_fid, NULL);
1133 EXPORT_SYMBOL(RMF_FID);
1134
1135 struct req_msg_field RMF_OST_ID =
1136         DEFINE_MSGF("ost_id", 0,
1137                     sizeof(struct ost_id), lustre_swab_ost_id, NULL);
1138 EXPORT_SYMBOL(RMF_OST_ID);
1139
1140 struct req_msg_field RMF_FIEMAP_KEY =
1141         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
1142                     lustre_swab_fiemap, NULL);
1143 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
1144
1145 struct req_msg_field RMF_FIEMAP_VAL =
1146         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap, NULL);
1147 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
1148
1149 struct req_msg_field RMF_IDX_INFO =
1150         DEFINE_MSGF("idx_info", 0, sizeof(struct idx_info),
1151                     lustre_swab_idx_info, NULL);
1152 EXPORT_SYMBOL(RMF_IDX_INFO);
1153 struct req_msg_field RMF_HSM_USER_STATE =
1154         DEFINE_MSGF("hsm_user_state", 0, sizeof(struct hsm_user_state),
1155                     lustre_swab_hsm_user_state, NULL);
1156 EXPORT_SYMBOL(RMF_HSM_USER_STATE);
1157
1158 struct req_msg_field RMF_HSM_STATE_SET =
1159         DEFINE_MSGF("hsm_state_set", 0, sizeof(struct hsm_state_set),
1160                     lustre_swab_hsm_state_set, NULL);
1161 EXPORT_SYMBOL(RMF_HSM_STATE_SET);
1162
1163 struct req_msg_field RMF_MDS_HSM_PROGRESS =
1164         DEFINE_MSGF("hsm_progress", 0, sizeof(struct hsm_progress_kernel),
1165                     lustre_swab_hsm_progress_kernel, NULL);
1166 EXPORT_SYMBOL(RMF_MDS_HSM_PROGRESS);
1167
1168 struct req_msg_field RMF_MDS_HSM_CURRENT_ACTION =
1169         DEFINE_MSGF("hsm_current_action", 0, sizeof(struct hsm_current_action),
1170                     lustre_swab_hsm_current_action, NULL);
1171 EXPORT_SYMBOL(RMF_MDS_HSM_CURRENT_ACTION);
1172
1173 struct req_msg_field RMF_MDS_HSM_USER_ITEM =
1174         DEFINE_MSGF("hsm_user_item", RMF_F_STRUCT_ARRAY,
1175                     sizeof(struct hsm_user_item), lustre_swab_hsm_user_item,
1176                     NULL);
1177 EXPORT_SYMBOL(RMF_MDS_HSM_USER_ITEM);
1178
1179 struct req_msg_field RMF_MDS_HSM_ARCHIVE =
1180         DEFINE_MSGF("hsm_archive", 0,
1181                     sizeof(__u32), lustre_swab_generic_32s, NULL);
1182 EXPORT_SYMBOL(RMF_MDS_HSM_ARCHIVE);
1183
1184 struct req_msg_field RMF_MDS_HSM_REQUEST =
1185         DEFINE_MSGF("hsm_request", 0, sizeof(struct hsm_request),
1186                     lustre_swab_hsm_request, NULL);
1187 EXPORT_SYMBOL(RMF_MDS_HSM_REQUEST);
1188
1189 struct req_msg_field RMF_OUT_UPDATE = DEFINE_MSGF("object_update", 0, -1,
1190                                 lustre_swab_object_update_request, NULL);
1191 EXPORT_SYMBOL(RMF_OUT_UPDATE);
1192
1193 struct req_msg_field RMF_OUT_UPDATE_REPLY =
1194                         DEFINE_MSGF("object_update_reply", 0, -1,
1195                                     lustre_swab_object_update_reply, NULL);
1196 EXPORT_SYMBOL(RMF_OUT_UPDATE_REPLY);
1197
1198 struct req_msg_field RMF_SWAP_LAYOUTS =
1199         DEFINE_MSGF("swap_layouts", 0, sizeof(struct  mdc_swap_layouts),
1200                     lustre_swab_swap_layouts, NULL);
1201 EXPORT_SYMBOL(RMF_SWAP_LAYOUTS);
1202
1203 struct req_msg_field RMF_LFSCK_REQUEST =
1204         DEFINE_MSGF("lfsck_request", 0, sizeof(struct lfsck_request),
1205                     lustre_swab_lfsck_request, NULL);
1206 EXPORT_SYMBOL(RMF_LFSCK_REQUEST);
1207
1208 struct req_msg_field RMF_LFSCK_REPLY =
1209         DEFINE_MSGF("lfsck_reply", 0, sizeof(struct lfsck_reply),
1210                     lustre_swab_lfsck_reply, NULL);
1211 EXPORT_SYMBOL(RMF_LFSCK_REPLY);
1212
1213 /*
1214  * Request formats.
1215  */
1216
1217 struct req_format {
1218         const char *rf_name;
1219         int         rf_idx;
1220         struct {
1221                 int                          nr;
1222                 const struct req_msg_field **d;
1223         } rf_fields[RCL_NR];
1224 };
1225
1226 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
1227         .rf_name   = name,                                              \
1228         .rf_fields = {                                                  \
1229                 [RCL_CLIENT] = {                                        \
1230                         .nr = client_nr,                                \
1231                         .d  = client                                    \
1232                 },                                                      \
1233                 [RCL_SERVER] = {                                        \
1234                         .nr = server_nr,                                \
1235                         .d  = server                                    \
1236                 }                                                       \
1237         }                                                               \
1238 }
1239
1240 #define DEFINE_REQ_FMT0(name, client, server)                                  \
1241 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
1242
1243 struct req_format RQF_OBD_PING =
1244         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
1245 EXPORT_SYMBOL(RQF_OBD_PING);
1246
1247 struct req_format RQF_OBD_SET_INFO =
1248         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
1249 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
1250
1251 /* Read index file through the network */
1252 struct req_format RQF_OBD_IDX_READ =
1253         DEFINE_REQ_FMT0("OBD_IDX_READ",
1254                         obd_idx_read_client, obd_idx_read_server);
1255 EXPORT_SYMBOL(RQF_OBD_IDX_READ);
1256
1257 struct req_format RQF_SEC_CTX =
1258         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
1259 EXPORT_SYMBOL(RQF_SEC_CTX);
1260
1261 struct req_format RQF_MGS_TARGET_REG =
1262         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
1263                          mgs_target_info_only);
1264 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
1265
1266 struct req_format RQF_MGS_SET_INFO =
1267         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
1268                          mgs_set_info);
1269 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
1270
1271 struct req_format RQF_MGS_CONFIG_READ =
1272         DEFINE_REQ_FMT0("MGS_CONFIG_READ", mgs_config_read_client,
1273                          mgs_config_read_server);
1274 EXPORT_SYMBOL(RQF_MGS_CONFIG_READ);
1275
1276 struct req_format RQF_SEQ_QUERY =
1277         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
1278 EXPORT_SYMBOL(RQF_SEQ_QUERY);
1279
1280 struct req_format RQF_FLD_QUERY =
1281         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
1282 EXPORT_SYMBOL(RQF_FLD_QUERY);
1283
1284 struct req_format RQF_FLD_READ =
1285         DEFINE_REQ_FMT0("FLD_READ", fld_read_client, fld_read_server);
1286 EXPORT_SYMBOL(RQF_FLD_READ);
1287
1288 struct req_format RQF_LOG_CANCEL =
1289         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
1290 EXPORT_SYMBOL(RQF_LOG_CANCEL);
1291
1292 struct req_format RQF_MDS_QUOTACHECK =
1293         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
1294 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
1295
1296 struct req_format RQF_OST_QUOTACHECK =
1297         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
1298 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
1299
1300 struct req_format RQF_MDS_QUOTACTL =
1301         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
1302 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
1303
1304 struct req_format RQF_OST_QUOTACTL =
1305         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
1306 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
1307
1308 struct req_format RQF_QC_CALLBACK =
1309         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
1310 EXPORT_SYMBOL(RQF_QC_CALLBACK);
1311
1312 struct req_format RQF_QUOTA_DQACQ =
1313         DEFINE_REQ_FMT0("QUOTA_DQACQ", quota_body_only, quota_body_only);
1314 EXPORT_SYMBOL(RQF_QUOTA_DQACQ);
1315
1316 struct req_format RQF_LDLM_INTENT_QUOTA =
1317         DEFINE_REQ_FMT0("LDLM_INTENT_QUOTA",
1318                         ldlm_intent_quota_client,
1319                         ldlm_intent_quota_server);
1320 EXPORT_SYMBOL(RQF_LDLM_INTENT_QUOTA);
1321
1322 struct req_format RQF_MDS_GETSTATUS =
1323         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
1324 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
1325
1326 struct req_format RQF_MDS_STATFS =
1327         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
1328 EXPORT_SYMBOL(RQF_MDS_STATFS);
1329
1330 struct req_format RQF_MDS_SYNC =
1331         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
1332 EXPORT_SYMBOL(RQF_MDS_SYNC);
1333
1334 struct req_format RQF_MDS_GETATTR =
1335         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
1336 EXPORT_SYMBOL(RQF_MDS_GETATTR);
1337
1338 struct req_format RQF_MDS_GETXATTR =
1339         DEFINE_REQ_FMT0("MDS_GETXATTR",
1340                         mds_getxattr_client, mds_getxattr_server);
1341 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
1342
1343 struct req_format RQF_MDS_GETATTR_NAME =
1344         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
1345                         mds_getattr_name_client, mds_getattr_server);
1346 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
1347
1348 struct req_format RQF_MDS_REINT =
1349         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
1350 EXPORT_SYMBOL(RQF_MDS_REINT);
1351
1352 struct req_format RQF_MDS_REINT_CREATE =
1353         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
1354                         mds_reint_create_client, mdt_body_capa);
1355 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
1356
1357 struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
1358         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
1359                         mds_reint_create_rmt_acl_client, mdt_body_capa);
1360 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
1361
1362 struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1363         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1364                         mds_reint_create_slave_client, mdt_body_capa);
1365 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1366
1367 struct req_format RQF_MDS_REINT_CREATE_SYM =
1368         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1369                         mds_reint_create_sym_client, mdt_body_capa);
1370 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1371
1372 struct req_format RQF_MDS_REINT_OPEN =
1373         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1374                         mds_reint_open_client, mds_reint_open_server);
1375 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1376
1377 struct req_format RQF_MDS_REINT_UNLINK =
1378         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1379                         mds_last_unlink_server);
1380 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1381
1382 struct req_format RQF_MDS_REINT_LINK =
1383         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1384                         mds_reint_link_client, mdt_body_only);
1385 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1386
1387 struct req_format RQF_MDS_REINT_RENAME =
1388         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1389                         mds_last_unlink_server);
1390 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1391
1392 struct req_format RQF_MDS_REINT_SETATTR =
1393         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1394                         mds_reint_setattr_client, mds_setattr_server);
1395 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1396
1397 struct req_format RQF_MDS_REINT_SETXATTR =
1398         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1399                         mds_reint_setxattr_client, mdt_body_only);
1400 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1401
1402 struct req_format RQF_MDS_CONNECT =
1403         DEFINE_REQ_FMT0("MDS_CONNECT",
1404                         obd_connect_client, obd_connect_server);
1405 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1406
1407 struct req_format RQF_MDS_DISCONNECT =
1408         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1409 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1410
1411 struct req_format RQF_MDS_GET_INFO =
1412         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1413                         mds_getinfo_server);
1414 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1415
1416 struct req_format RQF_OUT_UPDATE =
1417         DEFINE_REQ_FMT0("OUT_UPDATE_OBJ", mds_update_client,
1418                         mds_update_server);
1419 EXPORT_SYMBOL(RQF_OUT_UPDATE);
1420
1421 struct req_format RQF_LDLM_ENQUEUE =
1422         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1423                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1424 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1425
1426 struct req_format RQF_LDLM_ENQUEUE_LVB =
1427         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1428                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1429 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1430
1431 struct req_format RQF_LDLM_CONVERT =
1432         DEFINE_REQ_FMT0("LDLM_CONVERT",
1433                         ldlm_enqueue_client, ldlm_enqueue_server);
1434 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1435
1436 struct req_format RQF_LDLM_CANCEL =
1437         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1438 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1439
1440 struct req_format RQF_LDLM_CALLBACK =
1441         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1442 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1443
1444 struct req_format RQF_LDLM_CP_CALLBACK =
1445         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1446 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1447
1448 struct req_format RQF_LDLM_BL_CALLBACK =
1449         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1450 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1451
1452 struct req_format RQF_LDLM_GL_CALLBACK =
1453         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1454                         ldlm_gl_callback_server);
1455 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1456
1457 struct req_format RQF_LDLM_GL_DESC_CALLBACK =
1458         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_gl_callback_desc_client,
1459                         ldlm_gl_callback_server);
1460 EXPORT_SYMBOL(RQF_LDLM_GL_DESC_CALLBACK);
1461
1462 struct req_format RQF_LDLM_INTENT_BASIC =
1463         DEFINE_REQ_FMT0("LDLM_INTENT_BASIC",
1464                         ldlm_intent_basic_client, ldlm_enqueue_lvb_server);
1465 EXPORT_SYMBOL(RQF_LDLM_INTENT_BASIC);
1466
1467 struct req_format RQF_LDLM_INTENT =
1468         DEFINE_REQ_FMT0("LDLM_INTENT",
1469                         ldlm_intent_client, ldlm_intent_server);
1470 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1471
1472 struct req_format RQF_LDLM_INTENT_LAYOUT =
1473         DEFINE_REQ_FMT0("LDLM_INTENT_LAYOUT ",
1474                         ldlm_intent_layout_client, ldlm_enqueue_lvb_server);
1475 EXPORT_SYMBOL(RQF_LDLM_INTENT_LAYOUT);
1476
1477 struct req_format RQF_LDLM_INTENT_GETATTR =
1478         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1479                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1480 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1481
1482 struct req_format RQF_LDLM_INTENT_OPEN =
1483         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1484                         ldlm_intent_open_client, ldlm_intent_open_server);
1485 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1486
1487 struct req_format RQF_LDLM_INTENT_CREATE =
1488         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1489                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1490 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1491
1492 struct req_format RQF_LDLM_INTENT_UNLINK =
1493         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1494                         ldlm_intent_unlink_client, ldlm_intent_server);
1495 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1496
1497 struct req_format RQF_LDLM_INTENT_GETXATTR =
1498         DEFINE_REQ_FMT0("LDLM_INTENT_GETXATTR",
1499                         ldlm_intent_getxattr_client,
1500                         ldlm_intent_getxattr_server);
1501 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETXATTR);
1502
1503 struct req_format RQF_MDS_CLOSE =
1504         DEFINE_REQ_FMT0("MDS_CLOSE",
1505                         mdt_close_client, mds_last_unlink_server);
1506 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1507
1508 struct req_format RQF_MDS_RELEASE_CLOSE =
1509         DEFINE_REQ_FMT0("MDS_CLOSE",
1510                         mdt_release_close_client, mds_last_unlink_server);
1511 EXPORT_SYMBOL(RQF_MDS_RELEASE_CLOSE);
1512
1513 struct req_format RQF_MDS_DONE_WRITING =
1514         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1515                         mdt_close_client, mdt_body_only);
1516 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1517
1518 struct req_format RQF_MDS_READPAGE =
1519         DEFINE_REQ_FMT0("MDS_READPAGE",
1520                         mdt_body_capa, mdt_body_only);
1521 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1522
1523 struct req_format RQF_MDS_HSM_ACTION =
1524         DEFINE_REQ_FMT0("MDS_HSM_ACTION", mdt_body_capa, mdt_hsm_action_server);
1525 EXPORT_SYMBOL(RQF_MDS_HSM_ACTION);
1526
1527 struct req_format RQF_MDS_HSM_PROGRESS =
1528         DEFINE_REQ_FMT0("MDS_HSM_PROGRESS", mdt_hsm_progress, empty);
1529 EXPORT_SYMBOL(RQF_MDS_HSM_PROGRESS);
1530
1531 struct req_format RQF_MDS_HSM_CT_REGISTER =
1532         DEFINE_REQ_FMT0("MDS_HSM_CT_REGISTER", mdt_hsm_ct_register, empty);
1533 EXPORT_SYMBOL(RQF_MDS_HSM_CT_REGISTER);
1534
1535 struct req_format RQF_MDS_HSM_CT_UNREGISTER =
1536         DEFINE_REQ_FMT0("MDS_HSM_CT_UNREGISTER", mdt_hsm_ct_unregister, empty);
1537 EXPORT_SYMBOL(RQF_MDS_HSM_CT_UNREGISTER);
1538
1539 struct req_format RQF_MDS_HSM_STATE_GET =
1540         DEFINE_REQ_FMT0("MDS_HSM_STATE_GET",
1541                         mdt_body_capa, mdt_hsm_state_get_server);
1542 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_GET);
1543
1544 struct req_format RQF_MDS_HSM_STATE_SET =
1545         DEFINE_REQ_FMT0("MDS_HSM_STATE_SET", mdt_hsm_state_set, empty);
1546 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_SET);
1547
1548 struct req_format RQF_MDS_HSM_REQUEST =
1549         DEFINE_REQ_FMT0("MDS_HSM_REQUEST", mdt_hsm_request, empty);
1550 EXPORT_SYMBOL(RQF_MDS_HSM_REQUEST);
1551
1552 struct req_format RQF_MDS_SWAP_LAYOUTS =
1553         DEFINE_REQ_FMT0("MDS_SWAP_LAYOUTS",
1554                         mdt_swap_layouts, empty);
1555 EXPORT_SYMBOL(RQF_MDS_SWAP_LAYOUTS);
1556
1557 /* This is for split */
1558 struct req_format RQF_MDS_WRITEPAGE =
1559         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1560                         mdt_body_capa, mdt_body_only);
1561 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1562
1563 struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1564         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1565                         llog_origin_handle_create_client, llogd_body_only);
1566 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1567
1568 struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1569         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1570                         llogd_body_only, llogd_body_only);
1571 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1572
1573 struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1574         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1575                         llogd_body_only, llog_origin_handle_next_block_server);
1576 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1577
1578 struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1579         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1580                         llogd_body_only, llog_origin_handle_next_block_server);
1581 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1582
1583 struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1584         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1585                         llogd_body_only, llog_log_hdr_only);
1586 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1587
1588 struct req_format RQF_LLOG_ORIGIN_CONNECT =
1589         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1590 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1591
1592 struct req_format RQF_CONNECT =
1593         DEFINE_REQ_FMT0("CONNECT", obd_connect_client, obd_connect_server);
1594 EXPORT_SYMBOL(RQF_CONNECT);
1595
1596 struct req_format RQF_OST_CONNECT =
1597         DEFINE_REQ_FMT0("OST_CONNECT",
1598                         obd_connect_client, obd_connect_server);
1599 EXPORT_SYMBOL(RQF_OST_CONNECT);
1600
1601 struct req_format RQF_OST_DISCONNECT =
1602         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1603 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1604
1605 struct req_format RQF_OST_GETATTR =
1606         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1607 EXPORT_SYMBOL(RQF_OST_GETATTR);
1608
1609 struct req_format RQF_OST_SETATTR =
1610         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1611 EXPORT_SYMBOL(RQF_OST_SETATTR);
1612
1613 struct req_format RQF_OST_CREATE =
1614         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1615 EXPORT_SYMBOL(RQF_OST_CREATE);
1616
1617 struct req_format RQF_OST_PUNCH =
1618         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1619 EXPORT_SYMBOL(RQF_OST_PUNCH);
1620
1621 struct req_format RQF_OST_SYNC =
1622         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1623 EXPORT_SYMBOL(RQF_OST_SYNC);
1624
1625 struct req_format RQF_OST_DESTROY =
1626         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1627 EXPORT_SYMBOL(RQF_OST_DESTROY);
1628
1629 struct req_format RQF_OST_BRW_READ =
1630         DEFINE_REQ_FMT0("OST_BRW_READ", ost_brw_client, ost_brw_read_server);
1631 EXPORT_SYMBOL(RQF_OST_BRW_READ);
1632
1633 struct req_format RQF_OST_BRW_WRITE =
1634         DEFINE_REQ_FMT0("OST_BRW_WRITE", ost_brw_client, ost_brw_write_server);
1635 EXPORT_SYMBOL(RQF_OST_BRW_WRITE);
1636
1637 struct req_format RQF_OST_STATFS =
1638         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1639 EXPORT_SYMBOL(RQF_OST_STATFS);
1640
1641 struct req_format RQF_OST_SET_GRANT_INFO =
1642         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", ost_grant_shrink_client,
1643                          ost_body_only);
1644 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1645
1646 struct req_format RQF_OST_GET_INFO =
1647         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1648                                         ost_get_info_generic_server);
1649 EXPORT_SYMBOL(RQF_OST_GET_INFO);
1650
1651 struct req_format RQF_OST_GET_INFO_LAST_ID =
1652         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1653                                                 ost_get_last_id_server);
1654 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1655
1656 struct req_format RQF_OST_GET_INFO_LAST_FID =
1657         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_FID", ost_get_last_fid_client,
1658                                                  ost_get_last_fid_server);
1659 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_FID);
1660
1661 struct req_format RQF_OST_SET_INFO_LAST_FID =
1662         DEFINE_REQ_FMT0("OST_SET_INFO_LAST_FID", obd_set_info_client,
1663                                                  empty);
1664 EXPORT_SYMBOL(RQF_OST_SET_INFO_LAST_FID);
1665
1666 struct req_format RQF_OST_GET_INFO_FIEMAP =
1667         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1668                                                ost_get_fiemap_server);
1669 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1670
1671 struct req_format RQF_LFSCK_NOTIFY =
1672         DEFINE_REQ_FMT0("LFSCK_NOTIFY", obd_lfsck_request, empty);
1673 EXPORT_SYMBOL(RQF_LFSCK_NOTIFY);
1674
1675 struct req_format RQF_LFSCK_QUERY =
1676         DEFINE_REQ_FMT0("LFSCK_QUERY", obd_lfsck_request, obd_lfsck_reply);
1677 EXPORT_SYMBOL(RQF_LFSCK_QUERY);
1678
1679 #if !defined(__REQ_LAYOUT_USER__)
1680
1681 /* Convenience macro */
1682 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1683
1684 /**
1685  * Initializes the capsule abstraction by computing and setting the \a rf_idx
1686  * field of RQFs and the \a rmf_offset field of RMFs.
1687  */
1688 int req_layout_init(void)
1689 {
1690         int i;
1691         int j;
1692         int k;
1693         struct req_format *rf = NULL;
1694
1695         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1696                 rf = req_formats[i];
1697                 rf->rf_idx = i;
1698                 for (j = 0; j < RCL_NR; ++j) {
1699                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1700                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1701                                 struct req_msg_field *field;
1702
1703                                 field = (typeof(field))rf->rf_fields[j].d[k];
1704                                 LASSERT(!(field->rmf_flags & RMF_F_STRUCT_ARRAY)
1705                                         || field->rmf_size > 0);
1706                                 LASSERT(field->rmf_offset[i][j] == 0);
1707                                 /*
1708                                  * k + 1 to detect unused format/field
1709                                  * combinations.
1710                                  */
1711                                 field->rmf_offset[i][j] = k + 1;
1712                         }
1713                 }
1714         }
1715         return 0;
1716 }
1717 EXPORT_SYMBOL(req_layout_init);
1718
1719 void req_layout_fini(void)
1720 {
1721 }
1722 EXPORT_SYMBOL(req_layout_fini);
1723
1724 /**
1725  * Initializes the expected sizes of each RMF in a \a pill (\a rc_area) to -1.
1726  *
1727  * Actual/expected field sizes are set elsewhere in functions in this file:
1728  * req_capsule_init(), req_capsule_server_pack(), req_capsule_set_size() and
1729  * req_capsule_msg_size().  The \a rc_area information is used by.
1730  * ptlrpc_request_set_replen().
1731  */
1732 void req_capsule_init_area(struct req_capsule *pill)
1733 {
1734         int i;
1735
1736         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1737                 pill->rc_area[RCL_CLIENT][i] = -1;
1738                 pill->rc_area[RCL_SERVER][i] = -1;
1739         }
1740 }
1741 EXPORT_SYMBOL(req_capsule_init_area);
1742
1743 /**
1744  * Initialize a pill.
1745  *
1746  * The \a location indicates whether the caller is executing on the client side
1747  * (RCL_CLIENT) or server side (RCL_SERVER)..
1748  */
1749 void req_capsule_init(struct req_capsule *pill,
1750                       struct ptlrpc_request *req,
1751                       enum req_location location)
1752 {
1753         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1754
1755         /*
1756          * Today all capsules are embedded in ptlrpc_request structs,
1757          * but just in case that ever isn't the case, we don't reach
1758          * into req unless req != NULL and pill is the one embedded in
1759          * the req.
1760          *
1761          * The req->rq_pill_init flag makes it safe to initialize a pill
1762          * twice, which might happen in the OST paths as a result of the
1763          * high-priority RPC queue getting peeked at before ost_handle()
1764          * handles an OST RPC.
1765          */
1766         if (req != NULL && pill == &req->rq_pill && req->rq_pill_init)
1767                 return;
1768
1769         memset(pill, 0, sizeof *pill);
1770         pill->rc_req = req;
1771         pill->rc_loc = location;
1772         req_capsule_init_area(pill);
1773
1774         if (req != NULL && pill == &req->rq_pill)
1775                 req->rq_pill_init = 1;
1776 }
1777 EXPORT_SYMBOL(req_capsule_init);
1778
1779 void req_capsule_fini(struct req_capsule *pill)
1780 {
1781 }
1782 EXPORT_SYMBOL(req_capsule_fini);
1783
1784 static int __req_format_is_sane(const struct req_format *fmt)
1785 {
1786         return
1787                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1788                 req_formats[fmt->rf_idx] == fmt;
1789 }
1790
1791 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1792                                     enum req_location loc)
1793 {
1794         struct ptlrpc_request *req;
1795
1796         req = pill->rc_req;
1797         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1798 }
1799
1800 /**
1801  * Set the format (\a fmt) of a \a pill; format changes are not allowed here
1802  * (see req_capsule_extend()).
1803  */
1804 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1805 {
1806         LASSERT(pill->rc_fmt == NULL || pill->rc_fmt == fmt);
1807         LASSERT(__req_format_is_sane(fmt));
1808
1809         pill->rc_fmt = fmt;
1810 }
1811 EXPORT_SYMBOL(req_capsule_set);
1812
1813 /**
1814  * Fills in any parts of the \a rc_area of a \a pill that haven't been filled in
1815  * yet.
1816
1817  * \a rc_area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1818  * variable-sized fields.  The field sizes come from the declared \a rmf_size
1819  * field of a \a pill's \a rc_fmt's RMF's.
1820  */
1821 int req_capsule_filled_sizes(struct req_capsule *pill,
1822                            enum req_location loc)
1823 {
1824         const struct req_format *fmt = pill->rc_fmt;
1825         int                      i;
1826
1827         LASSERT(fmt != NULL);
1828
1829         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1830                 if (pill->rc_area[loc][i] == -1) {
1831                         pill->rc_area[loc][i] =
1832                                             fmt->rf_fields[loc].d[i]->rmf_size;
1833                         if (pill->rc_area[loc][i] == -1) {
1834                                 /*
1835                                  * Skip the following fields.
1836                                  *
1837                                  * If this LASSERT() trips then you're missing a
1838                                  * call to req_capsule_set_size().
1839                                  */
1840                                 LASSERT(loc != RCL_SERVER);
1841                                 break;
1842                         }
1843                 }
1844         }
1845         return i;
1846 }
1847 EXPORT_SYMBOL(req_capsule_filled_sizes);
1848
1849 /**
1850  * Capsule equivalent of lustre_pack_request() and lustre_pack_reply().
1851  *
1852  * This function uses the \a pill's \a rc_area as filled in by
1853  * req_capsule_set_size() or req_capsule_filled_sizes() (the latter is called by
1854  * this function).
1855  */
1856 int req_capsule_server_pack(struct req_capsule *pill)
1857 {
1858         const struct req_format *fmt;
1859         int                      count;
1860         int                      rc;
1861
1862         LASSERT(pill->rc_loc == RCL_SERVER);
1863         fmt = pill->rc_fmt;
1864         LASSERT(fmt != NULL);
1865
1866         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1867         rc = lustre_pack_reply(pill->rc_req, count,
1868                                pill->rc_area[RCL_SERVER], NULL);
1869         if (rc != 0) {
1870                 DEBUG_REQ(D_ERROR, pill->rc_req,
1871                        "Cannot pack %d fields in format `%s': ",
1872                        count, fmt->rf_name);
1873         }
1874         return rc;
1875 }
1876 EXPORT_SYMBOL(req_capsule_server_pack);
1877
1878 /**
1879  * Returns the PTLRPC request or reply (\a loc) buffer offset of a \a pill
1880  * corresponding to the given RMF (\a field).
1881  */
1882 static int __req_capsule_offset(const struct req_capsule *pill,
1883                                 const struct req_msg_field *field,
1884                                 enum req_location loc)
1885 {
1886         int offset;
1887
1888         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1889         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1890                             pill->rc_fmt->rf_name,
1891                             field->rmf_name, offset, loc);
1892         offset --;
1893
1894         LASSERT(0 <= offset && offset < REQ_MAX_FIELD_NR);
1895         return offset;
1896 }
1897
1898 /**
1899  * Helper for __req_capsule_get(); swabs value / array of values and/or dumps
1900  * them if desired.
1901  */
1902 static
1903 void
1904 swabber_dumper_helper(struct req_capsule *pill,
1905                       const struct req_msg_field *field,
1906                       enum req_location loc,
1907                       int offset,
1908                       void *value, int len, int dump, void (*swabber)( void *))
1909 {
1910         void    *p;
1911         int     i;
1912         int     n;
1913         int     do_swab;
1914         int     inout = loc == RCL_CLIENT;
1915
1916         swabber = swabber ?: field->rmf_swabber;
1917
1918         if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
1919             swabber != NULL && value != NULL)
1920                 do_swab = 1;
1921         else
1922                 do_swab = 0;
1923
1924         if (!field->rmf_dumper)
1925                 dump = 0;
1926
1927         if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY)) {
1928                 if (dump) {
1929                         CDEBUG(D_RPCTRACE, "Dump of %sfield %s follows\n",
1930                                do_swab ? "unswabbed " : "", field->rmf_name);
1931                         field->rmf_dumper(value);
1932                 }
1933                 if (!do_swab)
1934                         return;
1935                 swabber(value);
1936                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1937                 if (dump) {
1938                         CDEBUG(D_RPCTRACE, "Dump of swabbed field %s "
1939                                "follows\n", field->rmf_name);
1940                         field->rmf_dumper(value);
1941                 }
1942
1943                 return;
1944         }
1945
1946         /*
1947          * We're swabbing an array; swabber() swabs a single array element, so
1948          * swab every element.
1949          */
1950         LASSERT((len % field->rmf_size) == 0);
1951         for (p = value, i = 0, n = len / field->rmf_size;
1952              i < n;
1953              i++, p += field->rmf_size) {
1954                 if (dump) {
1955                         CDEBUG(D_RPCTRACE, "Dump of %sarray field %s, "
1956                                "element %d follows\n",
1957                                do_swab ? "unswabbed " : "", field->rmf_name, i);
1958                         field->rmf_dumper(p);
1959                 }
1960                 if (!do_swab)
1961                         continue;
1962                 swabber(p);
1963                 if (dump) {
1964                         CDEBUG(D_RPCTRACE, "Dump of swabbed array field %s, "
1965                                "element %d follows\n", field->rmf_name, i);
1966                         field->rmf_dumper(value);
1967                 }
1968         }
1969         if (do_swab)
1970                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1971 }
1972
1973 /**
1974  * Returns the pointer to a PTLRPC request or reply (\a loc) buffer of a \a pill
1975  * corresponding to the given RMF (\a field).
1976  *
1977  * The buffer will be swabbed using the given \a swabber.  If \a swabber == NULL
1978  * then the \a rmf_swabber from the RMF will be used.  Soon there will be no
1979  * calls to __req_capsule_get() with a non-NULL \a swabber; \a swabber will then
1980  * be removed.  Fields with the \a RMF_F_STRUCT_ARRAY flag set will have each
1981  * element of the array swabbed.
1982  */
1983 static void *__req_capsule_get(struct req_capsule *pill,
1984                                const struct req_msg_field *field,
1985                                enum req_location loc,
1986                                void (*swabber)( void *),
1987                                int dump)
1988 {
1989         const struct req_format *fmt;
1990         struct lustre_msg       *msg;
1991         void                    *value;
1992         int                      len;
1993         int                      offset;
1994
1995         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1996
1997         static const char *rcl_names[RCL_NR] = {
1998                 [RCL_CLIENT] = "client",
1999                 [RCL_SERVER] = "server"
2000         };
2001
2002         LASSERT(pill != NULL);
2003         LASSERT(pill != LP_POISON);
2004         fmt = pill->rc_fmt;
2005         LASSERT(fmt != NULL);
2006         LASSERT(fmt != LP_POISON);
2007         LASSERT(__req_format_is_sane(fmt));
2008
2009         offset = __req_capsule_offset(pill, field, loc);
2010
2011         msg = __req_msg(pill, loc);
2012         LASSERT(msg != NULL);
2013
2014         getter = (field->rmf_flags & RMF_F_STRING) ?
2015                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
2016
2017         if (field->rmf_flags & RMF_F_STRUCT_ARRAY) {
2018                 /*
2019                  * We've already asserted that field->rmf_size > 0 in
2020                  * req_layout_init().
2021                  */
2022                 len = lustre_msg_buflen(msg, offset);
2023                 if ((len % field->rmf_size) != 0) {
2024                         CERROR("%s: array field size mismatch "
2025                                "%d modulo %d != 0 (%d)\n",
2026                                field->rmf_name, len, field->rmf_size, loc);
2027                         return NULL;
2028                 }
2029         } else if (pill->rc_area[loc][offset] != -1) {
2030                 len = pill->rc_area[loc][offset];
2031         } else {
2032                 len = max(field->rmf_size, 0);
2033         }
2034         value = getter(msg, offset, len);
2035
2036         if (value == NULL) {
2037                 DEBUG_REQ(D_ERROR, pill->rc_req,
2038                           "Wrong buffer for field `%s' (%d of %d) "
2039                           "in format `%s': %d vs. %d (%s)\n",
2040                           field->rmf_name, offset, lustre_msg_bufcount(msg),
2041                           fmt->rf_name, lustre_msg_buflen(msg, offset), len,
2042                           rcl_names[loc]);
2043         } else {
2044                 swabber_dumper_helper(pill, field, loc, offset, value, len,
2045                                       dump, swabber);
2046         }
2047
2048         return value;
2049 }
2050
2051 /**
2052  * Dump a request and/or reply
2053  */
2054 void __req_capsule_dump(struct req_capsule *pill, enum req_location loc)
2055 {
2056         const struct    req_format *fmt;
2057         const struct    req_msg_field *field;
2058         int             len;
2059         int             i;
2060
2061         fmt = pill->rc_fmt;
2062
2063         DEBUG_REQ(D_RPCTRACE, pill->rc_req, "BEGIN REQ CAPSULE DUMP\n");
2064         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
2065                 field = FMT_FIELD(fmt, loc, i);
2066                 if (field->rmf_dumper == NULL) {
2067                         /*
2068                          * FIXME Add a default hex dumper for fields that don't
2069                          * have a specific dumper
2070                          */
2071                         len = req_capsule_get_size(pill, field, loc);
2072                         CDEBUG(D_RPCTRACE, "Field %s has no dumper function;"
2073                                "field size is %d\n", field->rmf_name, len);
2074                 } else {
2075                         /* It's the dumping side-effect that we're interested in */
2076                         (void) __req_capsule_get(pill, field, loc, NULL, 1);
2077                 }
2078         }
2079         CDEBUG(D_RPCTRACE, "END REQ CAPSULE DUMP\n");
2080 }
2081
2082 /**
2083  * Dump a request.
2084  */
2085 void req_capsule_client_dump(struct req_capsule *pill)
2086 {
2087         __req_capsule_dump(pill, RCL_CLIENT);
2088 }
2089 EXPORT_SYMBOL(req_capsule_client_dump);
2090
2091 /**
2092  * Dump a reply
2093  */
2094 void req_capsule_server_dump(struct req_capsule *pill)
2095 {
2096         __req_capsule_dump(pill, RCL_SERVER);
2097 }
2098 EXPORT_SYMBOL(req_capsule_server_dump);
2099
2100 /**
2101  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC request
2102  * buffer corresponding to the given RMF (\a field) of a \a pill.
2103  */
2104 void *req_capsule_client_get(struct req_capsule *pill,
2105                              const struct req_msg_field *field)
2106 {
2107         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
2108 }
2109 EXPORT_SYMBOL(req_capsule_client_get);
2110
2111 /**
2112  * Same as req_capsule_client_get(), but with a \a swabber argument.
2113  *
2114  * Currently unused; will be removed when req_capsule_server_swab_get() is
2115  * unused too.
2116  */
2117 void *req_capsule_client_swab_get(struct req_capsule *pill,
2118                                   const struct req_msg_field *field,
2119                                   void *swabber)
2120 {
2121         return __req_capsule_get(pill, field, RCL_CLIENT, swabber, 0);
2122 }
2123 EXPORT_SYMBOL(req_capsule_client_swab_get);
2124
2125 /**
2126  * Utility that combines req_capsule_set_size() and req_capsule_client_get().
2127  *
2128  * First the \a pill's request \a field's size is set (\a rc_area) using
2129  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2130  * returned.
2131  */
2132 void *req_capsule_client_sized_get(struct req_capsule *pill,
2133                                    const struct req_msg_field *field,
2134                                    int len)
2135 {
2136         req_capsule_set_size(pill, field, RCL_CLIENT, len);
2137         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
2138 }
2139 EXPORT_SYMBOL(req_capsule_client_sized_get);
2140
2141 /**
2142  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC reply
2143  * buffer corresponding to the given RMF (\a field) of a \a pill.
2144  */
2145 void *req_capsule_server_get(struct req_capsule *pill,
2146                              const struct req_msg_field *field)
2147 {
2148         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
2149 }
2150 EXPORT_SYMBOL(req_capsule_server_get);
2151
2152 /**
2153  * Same as req_capsule_server_get(), but with a \a swabber argument.
2154  *
2155  * Ideally all swabbing should be done pursuant to RMF definitions, with no
2156  * swabbing done outside this capsule abstraction.
2157  */
2158 void *req_capsule_server_swab_get(struct req_capsule *pill,
2159                                   const struct req_msg_field *field,
2160                                   void *swabber)
2161 {
2162         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
2163 }
2164 EXPORT_SYMBOL(req_capsule_server_swab_get);
2165
2166 /**
2167  * Utility that combines req_capsule_set_size() and req_capsule_server_get().
2168  *
2169  * First the \a pill's request \a field's size is set (\a rc_area) using
2170  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2171  * returned.
2172  */
2173 void *req_capsule_server_sized_get(struct req_capsule *pill,
2174                                    const struct req_msg_field *field,
2175                                    int len)
2176 {
2177         req_capsule_set_size(pill, field, RCL_SERVER, len);
2178         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
2179 }
2180 EXPORT_SYMBOL(req_capsule_server_sized_get);
2181
2182 void *req_capsule_server_sized_swab_get(struct req_capsule *pill,
2183                                         const struct req_msg_field *field,
2184                                         int len, void *swabber)
2185 {
2186         req_capsule_set_size(pill, field, RCL_SERVER, len);
2187         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
2188 }
2189 EXPORT_SYMBOL(req_capsule_server_sized_swab_get);
2190
2191 /**
2192  * Returns the buffer of a \a pill corresponding to the given \a field from the
2193  * request (if the caller is executing on the server-side) or reply (if the
2194  * caller is executing on the client-side).
2195  *
2196  * This function convienient for use is code that could be executed on the
2197  * client and server alike.
2198  */
2199 const void *req_capsule_other_get(struct req_capsule *pill,
2200                                   const struct req_msg_field *field)
2201 {
2202         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL, 0);
2203 }
2204 EXPORT_SYMBOL(req_capsule_other_get);
2205
2206 /**
2207  * Set the size of the PTLRPC request/reply (\a loc) buffer for the given \a
2208  * field of the given \a pill.
2209  *
2210  * This function must be used when constructing variable sized fields of a
2211  * request or reply.
2212  */
2213 void req_capsule_set_size(struct req_capsule *pill,
2214                           const struct req_msg_field *field,
2215                           enum req_location loc, int size)
2216 {
2217         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2218
2219         if ((size != field->rmf_size) &&
2220             (field->rmf_size != -1) &&
2221             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
2222             (size > 0)) {
2223                 if ((field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2224                     (size % field->rmf_size != 0)) {
2225                         CERROR("%s: array field size mismatch "
2226                                "%d %% %d != 0 (%d)\n",
2227                                field->rmf_name, size, field->rmf_size, loc);
2228                         LBUG();
2229                 } else if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2230                     size < field->rmf_size) {
2231                         CERROR("%s: field size mismatch %d != %d (%d)\n",
2232                                field->rmf_name, size, field->rmf_size, loc);
2233                         LBUG();
2234                 }
2235         }
2236
2237         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
2238 }
2239 EXPORT_SYMBOL(req_capsule_set_size);
2240
2241 /**
2242  * Return the actual PTLRPC buffer length of a request or reply (\a loc)
2243  * for the given \a pill's given \a field.
2244  *
2245  * NB: this function doesn't correspond with req_capsule_set_size(), which
2246  * actually sets the size in pill.rc_area[loc][offset], but this function
2247  * returns the message buflen[offset], maybe we should use another name.
2248  */
2249 int req_capsule_get_size(const struct req_capsule *pill,
2250                          const struct req_msg_field *field,
2251                          enum req_location loc)
2252 {
2253         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2254
2255         return lustre_msg_buflen(__req_msg(pill, loc),
2256                                  __req_capsule_offset(pill, field, loc));
2257 }
2258 EXPORT_SYMBOL(req_capsule_get_size);
2259
2260 /**
2261  * Wrapper around lustre_msg_size() that returns the PTLRPC size needed for the
2262  * given \a pill's request or reply (\a loc) given the field size recorded in
2263  * the \a pill's rc_area.
2264  *
2265  * See also req_capsule_set_size().
2266  */
2267 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
2268 {
2269         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
2270                                pill->rc_fmt->rf_fields[loc].nr,
2271                                pill->rc_area[loc]);
2272 }
2273
2274 /**
2275  * While req_capsule_msg_size() computes the size of a PTLRPC request or reply
2276  * (\a loc) given a \a pill's \a rc_area, this function computes the size of a
2277  * PTLRPC request or reply given only an RQF (\a fmt).
2278  *
2279  * This function should not be used for formats which contain variable size
2280  * fields.
2281  */
2282 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
2283                          enum req_location loc)
2284 {
2285         int size, i = 0;
2286
2287         /*
2288          * This function should probably LASSERT() that fmt has no fields with
2289          * RMF_F_STRUCT_ARRAY in rmf_flags, since we can't know here how many
2290          * elements in the array there will ultimately be, but then, we could
2291          * assume that there will be at least one element, and that's just what
2292          * we do.
2293          */
2294         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
2295         if (size < 0)
2296                 return size;
2297
2298         for (; i < fmt->rf_fields[loc].nr; ++i)
2299                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
2300                         size += cfs_size_round(fmt->rf_fields[loc].d[i]->
2301                                                rmf_size);
2302         return size;
2303 }
2304
2305 /**
2306  * Changes the format of an RPC.
2307  *
2308  * The pill must already have been initialized, which means that it already has
2309  * a request format.  The new format \a fmt must be an extension of the pill's
2310  * old format.  Specifically: the new format must have as many request and reply
2311  * fields as the old one, and all fields shared by the old and new format must
2312  * be at least as large in the new format.
2313  *
2314  * The new format's fields may be of different "type" than the old format, but
2315  * only for fields that are "opaque" blobs: fields which have a) have no
2316  * \a rmf_swabber, b) \a rmf_flags == 0 or RMF_F_NO_SIZE_CHECK, and c) \a
2317  * rmf_size == -1 or \a rmf_flags == RMF_F_NO_SIZE_CHECK.  For example,
2318  * OBD_SET_INFO has a key field and an opaque value field that gets interpreted
2319  * according to the key field.  When the value, according to the key, contains a
2320  * structure (or array thereof) to be swabbed, the format should be changed to
2321  * one where the value field has \a rmf_size/rmf_flags/rmf_swabber set
2322  * accordingly.
2323  */
2324 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
2325 {
2326         int i;
2327         int j;
2328
2329         const struct req_format *old;
2330
2331         LASSERT(pill->rc_fmt != NULL);
2332         LASSERT(__req_format_is_sane(fmt));
2333
2334         old = pill->rc_fmt;
2335         /*
2336          * Sanity checking...
2337          */
2338         for (i = 0; i < RCL_NR; ++i) {
2339                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
2340                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
2341                         const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
2342
2343                         /* "opaque" fields can be transmogrified */
2344                         if (ofield->rmf_swabber == NULL &&
2345                             (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
2346                             (ofield->rmf_size == -1 ||
2347                             ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
2348                                 continue;
2349                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
2350                 }
2351                 /*
2352                  * Last field in old format can be shorter than in new.
2353                  */
2354                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
2355                         FMT_FIELD(old, i, j)->rmf_size);
2356         }
2357
2358         pill->rc_fmt = fmt;
2359 }
2360 EXPORT_SYMBOL(req_capsule_extend);
2361
2362 /**
2363  * This function returns a non-zero value if the given \a field is present in
2364  * the format (\a rc_fmt) of \a pill's PTLRPC request or reply (\a loc), else it
2365  * returns 0.
2366  */
2367 int req_capsule_has_field(const struct req_capsule *pill,
2368                           const struct req_msg_field *field,
2369                           enum req_location loc)
2370 {
2371         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2372
2373         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
2374 }
2375 EXPORT_SYMBOL(req_capsule_has_field);
2376
2377 /**
2378  * Returns a non-zero value if the given \a field is present in the given \a
2379  * pill's PTLRPC request or reply (\a loc), else it returns 0.
2380  */
2381 int req_capsule_field_present(const struct req_capsule *pill,
2382                               const struct req_msg_field *field,
2383                               enum req_location loc)
2384 {
2385         int offset;
2386
2387         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2388         LASSERT(req_capsule_has_field(pill, field, loc));
2389
2390         offset = __req_capsule_offset(pill, field, loc);
2391         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
2392 }
2393 EXPORT_SYMBOL(req_capsule_field_present);
2394
2395 /**
2396  * This function shrinks the size of the _buffer_ of the \a pill's PTLRPC
2397  * request or reply (\a loc).
2398  *
2399  * This is not the opposite of req_capsule_extend().
2400  */
2401 void req_capsule_shrink(struct req_capsule *pill,
2402                         const struct req_msg_field *field,
2403                         unsigned int newlen,
2404                         enum req_location loc)
2405 {
2406         const struct req_format *fmt;
2407         struct lustre_msg       *msg;
2408         int                      len;
2409         int                      offset;
2410
2411         fmt = pill->rc_fmt;
2412         LASSERT(fmt != NULL);
2413         LASSERT(__req_format_is_sane(fmt));
2414         LASSERT(req_capsule_has_field(pill, field, loc));
2415         LASSERT(req_capsule_field_present(pill, field, loc));
2416
2417         offset = __req_capsule_offset(pill, field, loc);
2418
2419         msg = __req_msg(pill, loc);
2420         len = lustre_msg_buflen(msg, offset);
2421         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
2422                                 fmt->rf_name, field->rmf_name, len, newlen);
2423
2424         if (loc == RCL_CLIENT)
2425                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
2426                                                             1);
2427         else
2428                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
2429                                                             1);
2430 }
2431 EXPORT_SYMBOL(req_capsule_shrink);
2432
2433 int req_capsule_server_grow(struct req_capsule *pill,
2434                             const struct req_msg_field *field,
2435                             unsigned int newlen)
2436 {
2437         struct ptlrpc_reply_state *rs = pill->rc_req->rq_reply_state, *nrs;
2438         char *from, *to;
2439         int offset, len, rc;
2440
2441         LASSERT(pill->rc_fmt != NULL);
2442         LASSERT(__req_format_is_sane(pill->rc_fmt));
2443         LASSERT(req_capsule_has_field(pill, field, RCL_SERVER));
2444         LASSERT(req_capsule_field_present(pill, field, RCL_SERVER));
2445
2446         len = req_capsule_get_size(pill, field, RCL_SERVER);
2447         offset = __req_capsule_offset(pill, field, RCL_SERVER);
2448         if (pill->rc_req->rq_repbuf_len >=
2449             lustre_packed_msg_size(pill->rc_req->rq_repmsg) - len + newlen)
2450                 CERROR("Inplace repack might be done\n");
2451
2452         pill->rc_req->rq_reply_state = NULL;
2453         req_capsule_set_size(pill, field, RCL_SERVER, newlen);
2454         rc = req_capsule_server_pack(pill);
2455         if (rc) {
2456                 /* put old rs back, the caller will decide what to do */
2457                 pill->rc_req->rq_reply_state = rs;
2458                 return rc;
2459         }
2460         nrs = pill->rc_req->rq_reply_state;
2461         /* Now we need only buffers, copy first chunk */
2462         to = lustre_msg_buf(nrs->rs_msg, 0, 0);
2463         from = lustre_msg_buf(rs->rs_msg, 0, 0);
2464         len = (char *)lustre_msg_buf(rs->rs_msg, offset, 0) - from;
2465         memcpy(to, from, len);
2466         /* check if we have tail and copy it too */
2467         if (rs->rs_msg->lm_bufcount > offset + 1) {
2468                 to = lustre_msg_buf(nrs->rs_msg, offset + 1, 0);
2469                 from = lustre_msg_buf(rs->rs_msg, offset + 1, 0);
2470                 offset = rs->rs_msg->lm_bufcount - 1;
2471                 len = (char *)lustre_msg_buf(rs->rs_msg, offset, 0) +
2472                       cfs_size_round(rs->rs_msg->lm_buflens[offset]) - from;
2473                 memcpy(to, from, len);
2474         }
2475         /* drop old reply if everything is fine */
2476         if (rs->rs_difficult) {
2477                 /* copy rs data */
2478                 int i;
2479
2480                 nrs->rs_difficult = 1;
2481                 nrs->rs_no_ack = rs->rs_no_ack;
2482                 for (i = 0; i < rs->rs_nlocks; i++) {
2483                         nrs->rs_locks[i] = rs->rs_locks[i];
2484                         nrs->rs_modes[i] = rs->rs_modes[i];
2485                         nrs->rs_nlocks++;
2486                 }
2487                 rs->rs_nlocks = 0;
2488                 rs->rs_difficult = 0;
2489                 rs->rs_no_ack = 0;
2490         }
2491         ptlrpc_rs_decref(rs);
2492         return 0;
2493 }
2494 EXPORT_SYMBOL(req_capsule_server_grow);
2495 /* __REQ_LAYOUT_USER__ */
2496 #endif