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

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/ptlrpc/layout.c
  37  *
  38  * Lustre Metadata Target (mdt) request handler
  39  *
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  */
  42 /*
  43  * This file contains the "capsule/pill" abstraction layered above PTLRPC.
  44  *
  45  * Every struct ptlrpc_request contains a "pill", which points to a description
  46  * of the format that the request conforms to.
  47  */
  48
  49 #if !defined(__REQ_LAYOUT_USER__)
  50
  51 #define DEBUG_SUBSYSTEM S_RPC
  52
  53 #include <linux/module.h>
  54
  55 /* LUSTRE_VERSION_CODE */
  56 #include "../include/lustre_ver.h"
  57
  58 #include "../include/obd_support.h"
  59 /* lustre_swab_mdt_body */
  60 #include "../include/lustre/lustre_idl.h"
  61 /* obd2cli_tgt() (required by DEBUG_REQ()) */
  62 #include "../include/obd.h"
  63
  64 /* __REQ_LAYOUT_USER__ */
  65 #endif
  66 /* struct ptlrpc_request, lustre_msg* */
  67 #include "../include/lustre_req_layout.h"
  68 #include "../include/lustre_acl.h"
  69 #include "../include/lustre_debug.h"
  70
  71 /*
  72  * RQFs (see below) refer to two struct req_msg_field arrays describing the
  73  * client request and server reply, respectively.
  74  */
  75 /* empty set of fields... for suitable definition of emptiness. */
  76 static const struct req_msg_field *empty[] = {
  77         &RMF_PTLRPC_BODY
  78 };
  79
  80 static const struct req_msg_field *mgs_target_info_only[] = {
  81         &RMF_PTLRPC_BODY,
  82         &RMF_MGS_TARGET_INFO
  83 };
  84
  85 static const struct req_msg_field *mgs_set_info[] = {
  86         &RMF_PTLRPC_BODY,
  87         &RMF_MGS_SEND_PARAM
  88 };
  89
  90 static const struct req_msg_field *mgs_config_read_client[] = {
  91         &RMF_PTLRPC_BODY,
  92         &RMF_MGS_CONFIG_BODY
  93 };
  94
  95 static const struct req_msg_field *mgs_config_read_server[] = {
  96         &RMF_PTLRPC_BODY,
  97         &RMF_MGS_CONFIG_RES
  98 };
  99
 100 static const struct req_msg_field *log_cancel_client[] = {
 101         &RMF_PTLRPC_BODY,
 102         &RMF_LOGCOOKIES
 103 };
 104
 105 static const struct req_msg_field *mdt_body_only[] = {
 106         &RMF_PTLRPC_BODY,
 107         &RMF_MDT_BODY
 108 };
 109
 110 static const struct req_msg_field *mdt_body_capa[] = {
 111         &RMF_PTLRPC_BODY,
 112         &RMF_MDT_BODY,
 113         &RMF_CAPA1
 114 };
 115
 116 static const struct req_msg_field *quotactl_only[] = {
 117         &RMF_PTLRPC_BODY,
 118         &RMF_OBD_QUOTACTL
 119 };
 120
 121 static const struct req_msg_field *quota_body_only[] = {
 122         &RMF_PTLRPC_BODY,
 123         &RMF_QUOTA_BODY
 124 };
 125
 126 static const struct req_msg_field *ldlm_intent_quota_client[] = {
 127         &RMF_PTLRPC_BODY,
 128         &RMF_DLM_REQ,
 129         &RMF_LDLM_INTENT,
 130         &RMF_QUOTA_BODY
 131 };
 132
 133 static const struct req_msg_field *ldlm_intent_quota_server[] = {
 134         &RMF_PTLRPC_BODY,
 135         &RMF_DLM_REP,
 136         &RMF_DLM_LVB,
 137         &RMF_QUOTA_BODY
 138 };
 139
 140 static const struct req_msg_field *mdt_close_client[] = {
 141         &RMF_PTLRPC_BODY,
 142         &RMF_MDT_EPOCH,
 143         &RMF_REC_REINT,
 144         &RMF_CAPA1
 145 };
 146
 147 static const struct req_msg_field *mdt_release_close_client[] = {
 148         &RMF_PTLRPC_BODY,
 149         &RMF_MDT_EPOCH,
 150         &RMF_REC_REINT,
 151         &RMF_CAPA1,
 152         &RMF_CLOSE_DATA
 153 };
 154
 155 static const struct req_msg_field *obd_statfs_server[] = {
 156         &RMF_PTLRPC_BODY,
 157         &RMF_OBD_STATFS
 158 };
 159
 160 static const struct req_msg_field *seq_query_client[] = {
 161         &RMF_PTLRPC_BODY,
 162         &RMF_SEQ_OPC,
 163         &RMF_SEQ_RANGE
 164 };
 165
 166 static const struct req_msg_field *seq_query_server[] = {
 167         &RMF_PTLRPC_BODY,
 168         &RMF_SEQ_RANGE
 169 };
 170
 171 static const struct req_msg_field *fld_query_client[] = {
 172         &RMF_PTLRPC_BODY,
 173         &RMF_FLD_OPC,
 174         &RMF_FLD_MDFLD
 175 };
 176
 177 static const struct req_msg_field *fld_query_server[] = {
 178         &RMF_PTLRPC_BODY,
 179         &RMF_FLD_MDFLD
 180 };
 181
 182 static const struct req_msg_field *mds_getattr_name_client[] = {
 183         &RMF_PTLRPC_BODY,
 184         &RMF_MDT_BODY,
 185         &RMF_CAPA1,
 186         &RMF_NAME
 187 };
 188
 189 static const struct req_msg_field *mds_reint_client[] = {
 190         &RMF_PTLRPC_BODY,
 191         &RMF_REC_REINT
 192 };
 193
 194 static const struct req_msg_field *mds_reint_create_client[] = {
 195         &RMF_PTLRPC_BODY,
 196         &RMF_REC_REINT,
 197         &RMF_CAPA1,
 198         &RMF_NAME
 199 };
 200
 201 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 202         &RMF_PTLRPC_BODY,
 203         &RMF_REC_REINT,
 204         &RMF_CAPA1,
 205         &RMF_NAME,
 206         &RMF_EADATA,
 207         &RMF_DLM_REQ
 208 };
 209
 210 static const struct req_msg_field *mds_reint_create_rmt_acl_client[] = {
 211         &RMF_PTLRPC_BODY,
 212         &RMF_REC_REINT,
 213         &RMF_CAPA1,
 214         &RMF_NAME,
 215         &RMF_EADATA,
 216         &RMF_DLM_REQ
 217 };
 218
 219 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 220         &RMF_PTLRPC_BODY,
 221         &RMF_REC_REINT,
 222         &RMF_CAPA1,
 223         &RMF_NAME,
 224         &RMF_SYMTGT,
 225         &RMF_DLM_REQ
 226 };
 227
 228 static const struct req_msg_field *mds_reint_open_client[] = {
 229         &RMF_PTLRPC_BODY,
 230         &RMF_REC_REINT,
 231         &RMF_CAPA1,
 232         &RMF_CAPA2,
 233         &RMF_NAME,
 234         &RMF_EADATA
 235 };
 236
 237 static const struct req_msg_field *mds_reint_open_server[] = {
 238         &RMF_PTLRPC_BODY,
 239         &RMF_MDT_BODY,
 240         &RMF_MDT_MD,
 241         &RMF_ACL,
 242         &RMF_CAPA1,
 243         &RMF_CAPA2
 244 };
 245
 246 static const struct req_msg_field *mds_reint_unlink_client[] = {
 247         &RMF_PTLRPC_BODY,
 248         &RMF_REC_REINT,
 249         &RMF_CAPA1,
 250         &RMF_NAME,
 251         &RMF_DLM_REQ
 252 };
 253
 254 static const struct req_msg_field *mds_reint_link_client[] = {
 255         &RMF_PTLRPC_BODY,
 256         &RMF_REC_REINT,
 257         &RMF_CAPA1,
 258         &RMF_CAPA2,
 259         &RMF_NAME,
 260         &RMF_DLM_REQ
 261 };
 262
 263 static const struct req_msg_field *mds_reint_rename_client[] = {
 264         &RMF_PTLRPC_BODY,
 265         &RMF_REC_REINT,
 266         &RMF_CAPA1,
 267         &RMF_CAPA2,
 268         &RMF_NAME,
 269         &RMF_SYMTGT,
 270         &RMF_DLM_REQ
 271 };
 272
 273 static const struct req_msg_field *mds_last_unlink_server[] = {
 274         &RMF_PTLRPC_BODY,
 275         &RMF_MDT_BODY,
 276         &RMF_MDT_MD,
 277         &RMF_LOGCOOKIES,
 278         &RMF_CAPA1,
 279         &RMF_CAPA2
 280 };
 281
 282 static const struct req_msg_field *mds_reint_setattr_client[] = {
 283         &RMF_PTLRPC_BODY,
 284         &RMF_REC_REINT,
 285         &RMF_CAPA1,
 286         &RMF_MDT_EPOCH,
 287         &RMF_EADATA,
 288         &RMF_LOGCOOKIES,
 289         &RMF_DLM_REQ
 290 };
 291
 292 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 293         &RMF_PTLRPC_BODY,
 294         &RMF_REC_REINT,
 295         &RMF_CAPA1,
 296         &RMF_NAME,
 297         &RMF_EADATA,
 298         &RMF_DLM_REQ
 299 };
 300
 301 static const struct req_msg_field *mdt_swap_layouts[] = {
 302         &RMF_PTLRPC_BODY,
 303         &RMF_MDT_BODY,
 304         &RMF_SWAP_LAYOUTS,
 305         &RMF_CAPA1,
 306         &RMF_CAPA2,
 307         &RMF_DLM_REQ
 308 };
 309
 310 static const struct req_msg_field *obd_connect_client[] = {
 311         &RMF_PTLRPC_BODY,
 312         &RMF_TGTUUID,
 313         &RMF_CLUUID,
 314         &RMF_CONN,
 315         &RMF_CONNECT_DATA
 316 };
 317
 318 static const struct req_msg_field *obd_connect_server[] = {
 319         &RMF_PTLRPC_BODY,
 320         &RMF_CONNECT_DATA
 321 };
 322
 323 static const struct req_msg_field *obd_set_info_client[] = {
 324         &RMF_PTLRPC_BODY,
 325         &RMF_SETINFO_KEY,
 326         &RMF_SETINFO_VAL
 327 };
 328
 329 static const struct req_msg_field *ost_grant_shrink_client[] = {
 330         &RMF_PTLRPC_BODY,
 331         &RMF_SETINFO_KEY,
 332         &RMF_OST_BODY
 333 };
 334
 335 static const struct req_msg_field *mds_getinfo_client[] = {
 336         &RMF_PTLRPC_BODY,
 337         &RMF_GETINFO_KEY,
 338         &RMF_GETINFO_VALLEN
 339 };
 340
 341 static const struct req_msg_field *mds_getinfo_server[] = {
 342         &RMF_PTLRPC_BODY,
 343         &RMF_GETINFO_VAL,
 344 };
 345
 346 static const struct req_msg_field *ldlm_enqueue_client[] = {
 347         &RMF_PTLRPC_BODY,
 348         &RMF_DLM_REQ
 349 };
 350
 351 static const struct req_msg_field *ldlm_enqueue_server[] = {
 352         &RMF_PTLRPC_BODY,
 353         &RMF_DLM_REP
 354 };
 355
 356 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 357         &RMF_PTLRPC_BODY,
 358         &RMF_DLM_REP,
 359         &RMF_DLM_LVB
 360 };
 361
 362 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 363         &RMF_PTLRPC_BODY,
 364         &RMF_DLM_REQ,
 365         &RMF_DLM_LVB
 366 };
 367
 368 static const struct req_msg_field *ldlm_gl_callback_desc_client[] = {
 369         &RMF_PTLRPC_BODY,
 370         &RMF_DLM_REQ,
 371         &RMF_DLM_GL_DESC
 372 };
 373
 374 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 375         &RMF_PTLRPC_BODY,
 376         &RMF_DLM_LVB
 377 };
 378
 379 static const struct req_msg_field *ldlm_intent_basic_client[] = {
 380         &RMF_PTLRPC_BODY,
 381         &RMF_DLM_REQ,
 382         &RMF_LDLM_INTENT,
 383 };
 384
 385 static const struct req_msg_field *ldlm_intent_client[] = {
 386         &RMF_PTLRPC_BODY,
 387         &RMF_DLM_REQ,
 388         &RMF_LDLM_INTENT,
 389         &RMF_REC_REINT
 390 };
 391
 392 static const struct req_msg_field *ldlm_intent_server[] = {
 393         &RMF_PTLRPC_BODY,
 394         &RMF_DLM_REP,
 395         &RMF_MDT_BODY,
 396         &RMF_MDT_MD,
 397         &RMF_ACL
 398 };
 399
 400 static const struct req_msg_field *ldlm_intent_layout_client[] = {
 401         &RMF_PTLRPC_BODY,
 402         &RMF_DLM_REQ,
 403         &RMF_LDLM_INTENT,
 404         &RMF_LAYOUT_INTENT,
 405         &RMF_EADATA /* for new layout to be set up */
 406 };
 407
 408 static const struct req_msg_field *ldlm_intent_open_server[] = {
 409         &RMF_PTLRPC_BODY,
 410         &RMF_DLM_REP,
 411         &RMF_MDT_BODY,
 412         &RMF_MDT_MD,
 413         &RMF_ACL,
 414         &RMF_CAPA1,
 415         &RMF_CAPA2
 416 };
 417
 418 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 419         &RMF_PTLRPC_BODY,
 420         &RMF_DLM_REQ,
 421         &RMF_LDLM_INTENT,
 422         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 423         &RMF_CAPA1,
 424         &RMF_NAME
 425 };
 426
 427 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 428         &RMF_PTLRPC_BODY,
 429         &RMF_DLM_REP,
 430         &RMF_MDT_BODY,
 431         &RMF_MDT_MD,
 432         &RMF_ACL,
 433         &RMF_CAPA1
 434 };
 435
 436 static const struct req_msg_field *ldlm_intent_create_client[] = {
 437         &RMF_PTLRPC_BODY,
 438         &RMF_DLM_REQ,
 439         &RMF_LDLM_INTENT,
 440         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 441         &RMF_CAPA1,
 442         &RMF_NAME,
 443         &RMF_EADATA
 444 };
 445
 446 static const struct req_msg_field *ldlm_intent_open_client[] = {
 447         &RMF_PTLRPC_BODY,
 448         &RMF_DLM_REQ,
 449         &RMF_LDLM_INTENT,
 450         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 451         &RMF_CAPA1,
 452         &RMF_CAPA2,
 453         &RMF_NAME,
 454         &RMF_EADATA
 455 };
 456
 457 static const struct req_msg_field *ldlm_intent_unlink_client[] = {
 458         &RMF_PTLRPC_BODY,
 459         &RMF_DLM_REQ,
 460         &RMF_LDLM_INTENT,
 461         &RMF_REC_REINT,    /* coincides with mds_reint_unlink_client[] */
 462         &RMF_CAPA1,
 463         &RMF_NAME
 464 };
 465
 466 static const struct req_msg_field *ldlm_intent_getxattr_client[] = {
 467         &RMF_PTLRPC_BODY,
 468         &RMF_DLM_REQ,
 469         &RMF_LDLM_INTENT,
 470         &RMF_MDT_BODY,
 471         &RMF_CAPA1,
 472 };
 473
 474 static const struct req_msg_field *ldlm_intent_getxattr_server[] = {
 475         &RMF_PTLRPC_BODY,
 476         &RMF_DLM_REP,
 477         &RMF_MDT_BODY,
 478         &RMF_MDT_MD,
 479         &RMF_ACL, /* for req_capsule_extend/mdt_intent_policy */
 480         &RMF_EADATA,
 481         &RMF_EAVALS,
 482         &RMF_EAVALS_LENS
 483 };
 484
 485 static const struct req_msg_field *mds_getxattr_client[] = {
 486         &RMF_PTLRPC_BODY,
 487         &RMF_MDT_BODY,
 488         &RMF_CAPA1,
 489         &RMF_NAME,
 490         &RMF_EADATA
 491 };
 492
 493 static const struct req_msg_field *mds_getxattr_server[] = {
 494         &RMF_PTLRPC_BODY,
 495         &RMF_MDT_BODY,
 496         &RMF_EADATA
 497 };
 498
 499 static const struct req_msg_field *mds_getattr_server[] = {
 500         &RMF_PTLRPC_BODY,
 501         &RMF_MDT_BODY,
 502         &RMF_MDT_MD,
 503         &RMF_ACL,
 504         &RMF_CAPA1,
 505         &RMF_CAPA2
 506 };
 507
 508 static const struct req_msg_field *mds_setattr_server[] = {
 509         &RMF_PTLRPC_BODY,
 510         &RMF_MDT_BODY,
 511         &RMF_MDT_MD,
 512         &RMF_ACL,
 513         &RMF_CAPA1,
 514         &RMF_CAPA2
 515 };
 516
 517 static const struct req_msg_field *mds_update_client[] = {
 518         &RMF_PTLRPC_BODY,
 519         &RMF_UPDATE,
 520 };
 521
 522 static const struct req_msg_field *mds_update_server[] = {
 523         &RMF_PTLRPC_BODY,
 524         &RMF_UPDATE_REPLY,
 525 };
 526
 527 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 528         &RMF_PTLRPC_BODY,
 529         &RMF_LLOGD_BODY,
 530         &RMF_NAME
 531 };
 532
 533 static const struct req_msg_field *llogd_body_only[] = {
 534         &RMF_PTLRPC_BODY,
 535         &RMF_LLOGD_BODY
 536 };
 537
 538 static const struct req_msg_field *llog_log_hdr_only[] = {
 539         &RMF_PTLRPC_BODY,
 540         &RMF_LLOG_LOG_HDR
 541 };
 542
 543 static const struct req_msg_field *llogd_conn_body_only[] = {
 544         &RMF_PTLRPC_BODY,
 545         &RMF_LLOGD_CONN_BODY
 546 };
 547
 548 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 549         &RMF_PTLRPC_BODY,
 550         &RMF_LLOGD_BODY,
 551         &RMF_EADATA
 552 };
 553
 554 static const struct req_msg_field *obd_idx_read_client[] = {
 555         &RMF_PTLRPC_BODY,
 556         &RMF_IDX_INFO
 557 };
 558
 559 static const struct req_msg_field *obd_idx_read_server[] = {
 560         &RMF_PTLRPC_BODY,
 561         &RMF_IDX_INFO
 562 };
 563
 564 static const struct req_msg_field *ost_body_only[] = {
 565         &RMF_PTLRPC_BODY,
 566         &RMF_OST_BODY
 567 };
 568
 569 static const struct req_msg_field *ost_body_capa[] = {
 570         &RMF_PTLRPC_BODY,
 571         &RMF_OST_BODY,
 572         &RMF_CAPA1
 573 };
 574
 575 static const struct req_msg_field *ost_destroy_client[] = {
 576         &RMF_PTLRPC_BODY,
 577         &RMF_OST_BODY,
 578         &RMF_DLM_REQ,
 579         &RMF_CAPA1
 580 };
 581
 582 static const struct req_msg_field *ost_brw_client[] = {
 583         &RMF_PTLRPC_BODY,
 584         &RMF_OST_BODY,
 585         &RMF_OBD_IOOBJ,
 586         &RMF_NIOBUF_REMOTE,
 587         &RMF_CAPA1
 588 };
 589
 590 static const struct req_msg_field *ost_brw_read_server[] = {
 591         &RMF_PTLRPC_BODY,
 592         &RMF_OST_BODY
 593 };
 594
 595 static const struct req_msg_field *ost_brw_write_server[] = {
 596         &RMF_PTLRPC_BODY,
 597         &RMF_OST_BODY,
 598         &RMF_RCS
 599 };
 600
 601 static const struct req_msg_field *ost_get_info_generic_server[] = {
 602         &RMF_PTLRPC_BODY,
 603         &RMF_GENERIC_DATA,
 604 };
 605
 606 static const struct req_msg_field *ost_get_info_generic_client[] = {
 607         &RMF_PTLRPC_BODY,
 608         &RMF_SETINFO_KEY
 609 };
 610
 611 static const struct req_msg_field *ost_get_last_id_server[] = {
 612         &RMF_PTLRPC_BODY,
 613         &RMF_OBD_ID
 614 };
 615
 616 static const struct req_msg_field *ost_get_last_fid_server[] = {
 617         &RMF_PTLRPC_BODY,
 618         &RMF_FID,
 619 };
 620
 621 static const struct req_msg_field *ost_get_fiemap_client[] = {
 622         &RMF_PTLRPC_BODY,
 623         &RMF_FIEMAP_KEY,
 624         &RMF_FIEMAP_VAL
 625 };
 626
 627 static const struct req_msg_field *ost_get_fiemap_server[] = {
 628         &RMF_PTLRPC_BODY,
 629         &RMF_FIEMAP_VAL
 630 };
 631
 632 static const struct req_msg_field *mdt_hsm_progress[] = {
 633         &RMF_PTLRPC_BODY,
 634         &RMF_MDT_BODY,
 635         &RMF_MDS_HSM_PROGRESS,
 636 };
 637
 638 static const struct req_msg_field *mdt_hsm_ct_register[] = {
 639         &RMF_PTLRPC_BODY,
 640         &RMF_MDT_BODY,
 641         &RMF_MDS_HSM_ARCHIVE,
 642 };
 643
 644 static const struct req_msg_field *mdt_hsm_ct_unregister[] = {
 645         &RMF_PTLRPC_BODY,
 646         &RMF_MDT_BODY,
 647 };
 648
 649 static const struct req_msg_field *mdt_hsm_action_server[] = {
 650         &RMF_PTLRPC_BODY,
 651         &RMF_MDT_BODY,
 652         &RMF_MDS_HSM_CURRENT_ACTION,
 653 };
 654
 655 static const struct req_msg_field *mdt_hsm_state_get_server[] = {
 656         &RMF_PTLRPC_BODY,
 657         &RMF_MDT_BODY,
 658         &RMF_HSM_USER_STATE,
 659 };
 660
 661 static const struct req_msg_field *mdt_hsm_state_set[] = {
 662         &RMF_PTLRPC_BODY,
 663         &RMF_MDT_BODY,
 664         &RMF_CAPA1,
 665         &RMF_HSM_STATE_SET,
 666 };
 667
 668 static const struct req_msg_field *mdt_hsm_request[] = {
 669         &RMF_PTLRPC_BODY,
 670         &RMF_MDT_BODY,
 671         &RMF_MDS_HSM_REQUEST,
 672         &RMF_MDS_HSM_USER_ITEM,
 673         &RMF_GENERIC_DATA,
 674 };
 675
 676 static struct req_format *req_formats[] = {
 677         &RQF_OBD_PING,
 678         &RQF_OBD_SET_INFO,
 679         &RQF_OBD_IDX_READ,
 680         &RQF_SEC_CTX,
 681         &RQF_MGS_TARGET_REG,
 682         &RQF_MGS_SET_INFO,
 683         &RQF_MGS_CONFIG_READ,
 684         &RQF_SEQ_QUERY,
 685         &RQF_FLD_QUERY,
 686         &RQF_MDS_CONNECT,
 687         &RQF_MDS_DISCONNECT,
 688         &RQF_MDS_GET_INFO,
 689         &RQF_MDS_GETSTATUS,
 690         &RQF_MDS_STATFS,
 691         &RQF_MDS_GETATTR,
 692         &RQF_MDS_GETATTR_NAME,
 693         &RQF_MDS_GETXATTR,
 694         &RQF_MDS_SYNC,
 695         &RQF_MDS_CLOSE,
 696         &RQF_MDS_RELEASE_CLOSE,
 697         &RQF_MDS_PIN,
 698         &RQF_MDS_UNPIN,
 699         &RQF_MDS_READPAGE,
 700         &RQF_MDS_WRITEPAGE,
 701         &RQF_MDS_IS_SUBDIR,
 702         &RQF_MDS_DONE_WRITING,
 703         &RQF_MDS_REINT,
 704         &RQF_MDS_REINT_CREATE,
 705         &RQF_MDS_REINT_CREATE_RMT_ACL,
 706         &RQF_MDS_REINT_CREATE_SLAVE,
 707         &RQF_MDS_REINT_CREATE_SYM,
 708         &RQF_MDS_REINT_OPEN,
 709         &RQF_MDS_REINT_UNLINK,
 710         &RQF_MDS_REINT_LINK,
 711         &RQF_MDS_REINT_RENAME,
 712         &RQF_MDS_REINT_SETATTR,
 713         &RQF_MDS_REINT_SETXATTR,
 714         &RQF_MDS_QUOTACHECK,
 715         &RQF_MDS_QUOTACTL,
 716         &RQF_MDS_HSM_PROGRESS,
 717         &RQF_MDS_HSM_CT_REGISTER,
 718         &RQF_MDS_HSM_CT_UNREGISTER,
 719         &RQF_MDS_HSM_STATE_GET,
 720         &RQF_MDS_HSM_STATE_SET,
 721         &RQF_MDS_HSM_ACTION,
 722         &RQF_MDS_HSM_REQUEST,
 723         &RQF_MDS_SWAP_LAYOUTS,
 724         &RQF_UPDATE_OBJ,
 725         &RQF_QC_CALLBACK,
 726         &RQF_OST_CONNECT,
 727         &RQF_OST_DISCONNECT,
 728         &RQF_OST_QUOTACHECK,
 729         &RQF_OST_QUOTACTL,
 730         &RQF_OST_GETATTR,
 731         &RQF_OST_SETATTR,
 732         &RQF_OST_CREATE,
 733         &RQF_OST_PUNCH,
 734         &RQF_OST_SYNC,
 735         &RQF_OST_DESTROY,
 736         &RQF_OST_BRW_READ,
 737         &RQF_OST_BRW_WRITE,
 738         &RQF_OST_STATFS,
 739         &RQF_OST_SET_GRANT_INFO,
 740         &RQF_OST_GET_INFO_GENERIC,
 741         &RQF_OST_GET_INFO_LAST_ID,
 742         &RQF_OST_GET_INFO_LAST_FID,
 743         &RQF_OST_SET_INFO_LAST_FID,
 744         &RQF_OST_GET_INFO_FIEMAP,
 745         &RQF_LDLM_ENQUEUE,
 746         &RQF_LDLM_ENQUEUE_LVB,
 747         &RQF_LDLM_CONVERT,
 748         &RQF_LDLM_CANCEL,
 749         &RQF_LDLM_CALLBACK,
 750         &RQF_LDLM_CP_CALLBACK,
 751         &RQF_LDLM_BL_CALLBACK,
 752         &RQF_LDLM_GL_CALLBACK,
 753         &RQF_LDLM_GL_DESC_CALLBACK,
 754         &RQF_LDLM_INTENT,
 755         &RQF_LDLM_INTENT_BASIC,
 756         &RQF_LDLM_INTENT_LAYOUT,
 757         &RQF_LDLM_INTENT_GETATTR,
 758         &RQF_LDLM_INTENT_OPEN,
 759         &RQF_LDLM_INTENT_CREATE,
 760         &RQF_LDLM_INTENT_UNLINK,
 761         &RQF_LDLM_INTENT_GETXATTR,
 762         &RQF_LDLM_INTENT_QUOTA,
 763         &RQF_QUOTA_DQACQ,
 764         &RQF_LOG_CANCEL,
 765         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 766         &RQF_LLOG_ORIGIN_HANDLE_DESTROY,
 767         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 768         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 769         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 770         &RQF_LLOG_ORIGIN_CONNECT,
 771         &RQF_CONNECT,
 772 };
 773
 774 struct req_msg_field {
 775         const __u32 rmf_flags;
 776         const char  *rmf_name;
 777         /**
 778          * Field length. (-1) means "variable length".  If the
 779          * \a RMF_F_STRUCT_ARRAY flag is set the field is also variable-length,
 780          * but the actual size must be a whole multiple of \a rmf_size.
 781          */
 782         const int   rmf_size;
 783         void    (*rmf_swabber)(void *);
 784         void    (*rmf_dumper)(void *);
 785         int      rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 786 };
 787
 788 enum rmf_flags {
 789         /**
 790          * The field is a string, must be NUL-terminated.
 791          */
 792         RMF_F_STRING = BIT(0),
 793         /**
 794          * The field's buffer size need not match the declared \a rmf_size.
 795          */
 796         RMF_F_NO_SIZE_CHECK = BIT(1),
 797         /**
 798          * The field's buffer size must be a whole multiple of the declared \a
 799          * rmf_size and the \a rmf_swabber function must work on the declared \a
 800          * rmf_size worth of bytes.
 801          */
 802         RMF_F_STRUCT_ARRAY = BIT(2)
 803 };
 804
 805 struct req_capsule;
 806
 807 /*
 808  * Request fields.
 809  */
 810 #define DEFINE_MSGF(name, flags, size, swabber, dumper) {       \
 811         .rmf_name    = (name),                                  \
 812         .rmf_flags   = (flags),                                 \
 813         .rmf_size    = (size),                                  \
 814         .rmf_swabber = (void (*)(void *))(swabber),             \
 815         .rmf_dumper  = (void (*)(void *))(dumper)               \
 816 }
 817
 818 struct req_msg_field RMF_GENERIC_DATA =
 819         DEFINE_MSGF("generic_data", 0,
 820                     -1, NULL, NULL);
 821 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 822
 823 struct req_msg_field RMF_MGS_TARGET_INFO =
 824         DEFINE_MSGF("mgs_target_info", 0,
 825                     sizeof(struct mgs_target_info),
 826                     lustre_swab_mgs_target_info, NULL);
 827 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 828
 829 struct req_msg_field RMF_MGS_SEND_PARAM =
 830         DEFINE_MSGF("mgs_send_param", 0,
 831                     sizeof(struct mgs_send_param),
 832                     NULL, NULL);
 833 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 834
 835 struct req_msg_field RMF_MGS_CONFIG_BODY =
 836         DEFINE_MSGF("mgs_config_read request", 0,
 837                     sizeof(struct mgs_config_body),
 838                     lustre_swab_mgs_config_body, NULL);
 839 EXPORT_SYMBOL(RMF_MGS_CONFIG_BODY);
 840
 841 struct req_msg_field RMF_MGS_CONFIG_RES =
 842         DEFINE_MSGF("mgs_config_read reply ", 0,
 843                     sizeof(struct mgs_config_res),
 844                     lustre_swab_mgs_config_res, NULL);
 845 EXPORT_SYMBOL(RMF_MGS_CONFIG_RES);
 846
 847 struct req_msg_field RMF_U32 =
 848         DEFINE_MSGF("generic u32", 0,
 849                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 850 EXPORT_SYMBOL(RMF_U32);
 851
 852 struct req_msg_field RMF_SETINFO_VAL =
 853         DEFINE_MSGF("setinfo_val", 0, -1, NULL, NULL);
 854 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 855
 856 struct req_msg_field RMF_GETINFO_KEY =
 857         DEFINE_MSGF("getinfo_key", 0, -1, NULL, NULL);
 858 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 859
 860 struct req_msg_field RMF_GETINFO_VALLEN =
 861         DEFINE_MSGF("getinfo_vallen", 0,
 862                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 863 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 864
 865 struct req_msg_field RMF_GETINFO_VAL =
 866         DEFINE_MSGF("getinfo_val", 0, -1, NULL, NULL);
 867 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 868
 869 struct req_msg_field RMF_SEQ_OPC =
 870         DEFINE_MSGF("seq_query_opc", 0,
 871                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 872 EXPORT_SYMBOL(RMF_SEQ_OPC);
 873
 874 struct req_msg_field RMF_SEQ_RANGE =
 875         DEFINE_MSGF("seq_query_range", 0,
 876                     sizeof(struct lu_seq_range),
 877                     lustre_swab_lu_seq_range, NULL);
 878 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 879
 880 struct req_msg_field RMF_FLD_OPC =
 881         DEFINE_MSGF("fld_query_opc", 0,
 882                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 883 EXPORT_SYMBOL(RMF_FLD_OPC);
 884
 885 struct req_msg_field RMF_FLD_MDFLD =
 886         DEFINE_MSGF("fld_query_mdfld", 0,
 887                     sizeof(struct lu_seq_range),
 888                     lustre_swab_lu_seq_range, NULL);
 889 EXPORT_SYMBOL(RMF_FLD_MDFLD);
 890
 891 struct req_msg_field RMF_MDT_BODY =
 892         DEFINE_MSGF("mdt_body", 0,
 893                     sizeof(struct mdt_body), lustre_swab_mdt_body, NULL);
 894 EXPORT_SYMBOL(RMF_MDT_BODY);
 895
 896 struct req_msg_field RMF_OBD_QUOTACTL =
 897         DEFINE_MSGF("obd_quotactl", 0,
 898                     sizeof(struct obd_quotactl),
 899                     lustre_swab_obd_quotactl, NULL);
 900 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
 901
 902 struct req_msg_field RMF_QUOTA_BODY =
 903         DEFINE_MSGF("quota_body", 0,
 904                     sizeof(struct quota_body), lustre_swab_quota_body, NULL);
 905 EXPORT_SYMBOL(RMF_QUOTA_BODY);
 906
 907 struct req_msg_field RMF_MDT_EPOCH =
 908         DEFINE_MSGF("mdt_ioepoch", 0,
 909                     sizeof(struct mdt_ioepoch), lustre_swab_mdt_ioepoch, NULL);
 910 EXPORT_SYMBOL(RMF_MDT_EPOCH);
 911
 912 struct req_msg_field RMF_PTLRPC_BODY =
 913         DEFINE_MSGF("ptlrpc_body", 0,
 914                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body, NULL);
 915 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
 916
 917 struct req_msg_field RMF_CLOSE_DATA =
 918         DEFINE_MSGF("data_version", 0,
 919                     sizeof(struct close_data), lustre_swab_close_data, NULL);
 920 EXPORT_SYMBOL(RMF_CLOSE_DATA);
 921
 922 struct req_msg_field RMF_OBD_STATFS =
 923         DEFINE_MSGF("obd_statfs", 0,
 924                     sizeof(struct obd_statfs), lustre_swab_obd_statfs, NULL);
 925 EXPORT_SYMBOL(RMF_OBD_STATFS);
 926
 927 struct req_msg_field RMF_SETINFO_KEY =
 928         DEFINE_MSGF("setinfo_key", 0, -1, NULL, NULL);
 929 EXPORT_SYMBOL(RMF_SETINFO_KEY);
 930
 931 struct req_msg_field RMF_NAME =
 932         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL, NULL);
 933 EXPORT_SYMBOL(RMF_NAME);
 934
 935 struct req_msg_field RMF_SYMTGT =
 936         DEFINE_MSGF("symtgt", RMF_F_STRING, -1, NULL, NULL);
 937 EXPORT_SYMBOL(RMF_SYMTGT);
 938
 939 struct req_msg_field RMF_TGTUUID =
 940         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 941         NULL);
 942 EXPORT_SYMBOL(RMF_TGTUUID);
 943
 944 struct req_msg_field RMF_CLUUID =
 945         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
 946         NULL);
 947 EXPORT_SYMBOL(RMF_CLUUID);
 948
 949 struct req_msg_field RMF_STRING =
 950         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL, NULL);
 951 EXPORT_SYMBOL(RMF_STRING);
 952
 953 struct req_msg_field RMF_LLOGD_BODY =
 954         DEFINE_MSGF("llogd_body", 0,
 955                     sizeof(struct llogd_body), lustre_swab_llogd_body, NULL);
 956 EXPORT_SYMBOL(RMF_LLOGD_BODY);
 957
 958 struct req_msg_field RMF_LLOG_LOG_HDR =
 959         DEFINE_MSGF("llog_log_hdr", 0,
 960                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr, NULL);
 961 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
 962
 963 struct req_msg_field RMF_LLOGD_CONN_BODY =
 964         DEFINE_MSGF("llogd_conn_body", 0,
 965                     sizeof(struct llogd_conn_body),
 966                     lustre_swab_llogd_conn_body, NULL);
 967 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
 968
 969 /*
 970  * connection handle received in MDS_CONNECT request.
 971  *
 972  * No swabbing needed because struct lustre_handle contains only a 64-bit cookie
 973  * that the client does not interpret at all.
 974  */
 975 struct req_msg_field RMF_CONN =
 976         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL, NULL);
 977 EXPORT_SYMBOL(RMF_CONN);
 978
 979 struct req_msg_field RMF_CONNECT_DATA =
 980         DEFINE_MSGF("cdata",
 981                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
 982                     sizeof(struct obd_connect_data),
 983                     lustre_swab_connect, NULL);
 984 EXPORT_SYMBOL(RMF_CONNECT_DATA);
 985
 986 struct req_msg_field RMF_DLM_REQ =
 987         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
 988                     sizeof(struct ldlm_request),
 989                     lustre_swab_ldlm_request, NULL);
 990 EXPORT_SYMBOL(RMF_DLM_REQ);
 991
 992 struct req_msg_field RMF_DLM_REP =
 993         DEFINE_MSGF("dlm_rep", 0,
 994                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply, NULL);
 995 EXPORT_SYMBOL(RMF_DLM_REP);
 996
 997 struct req_msg_field RMF_LDLM_INTENT =
 998         DEFINE_MSGF("ldlm_intent", 0,
 999                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent, NULL);
1000 EXPORT_SYMBOL(RMF_LDLM_INTENT);
1001
1002 struct req_msg_field RMF_DLM_LVB =
1003         DEFINE_MSGF("dlm_lvb", 0, -1, NULL, NULL);
1004 EXPORT_SYMBOL(RMF_DLM_LVB);
1005
1006 struct req_msg_field RMF_DLM_GL_DESC =
1007         DEFINE_MSGF("dlm_gl_desc", 0, sizeof(union ldlm_gl_desc),
1008                     lustre_swab_gl_desc, NULL);
1009 EXPORT_SYMBOL(RMF_DLM_GL_DESC);
1010
1011 struct req_msg_field RMF_MDT_MD =
1012         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL, NULL);
1013 EXPORT_SYMBOL(RMF_MDT_MD);
1014
1015 struct req_msg_field RMF_REC_REINT =
1016         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
1017                     lustre_swab_mdt_rec_reint, NULL);
1018 EXPORT_SYMBOL(RMF_REC_REINT);
1019
1020 /* FIXME: this length should be defined as a macro */
1021 struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1,
1022                                                     NULL, NULL);
1023 EXPORT_SYMBOL(RMF_EADATA);
1024
1025 struct req_msg_field RMF_EAVALS = DEFINE_MSGF("eavals", 0, -1, NULL, NULL);
1026 EXPORT_SYMBOL(RMF_EAVALS);
1027
1028 struct req_msg_field RMF_ACL =
1029         DEFINE_MSGF("acl", RMF_F_NO_SIZE_CHECK,
1030                     LUSTRE_POSIX_ACL_MAX_SIZE, NULL, NULL);
1031 EXPORT_SYMBOL(RMF_ACL);
1032
1033 /* FIXME: this should be made to use RMF_F_STRUCT_ARRAY */
1034 struct req_msg_field RMF_LOGCOOKIES =
1035         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
1036                     sizeof(struct llog_cookie), NULL, NULL);
1037 EXPORT_SYMBOL(RMF_LOGCOOKIES);
1038
1039 struct req_msg_field RMF_CAPA1 =
1040         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1041                     lustre_swab_lustre_capa, NULL);
1042 EXPORT_SYMBOL(RMF_CAPA1);
1043
1044 struct req_msg_field RMF_CAPA2 =
1045         DEFINE_MSGF("capa", 0, sizeof(struct lustre_capa),
1046                     lustre_swab_lustre_capa, NULL);
1047 EXPORT_SYMBOL(RMF_CAPA2);
1048
1049 struct req_msg_field RMF_LAYOUT_INTENT =
1050         DEFINE_MSGF("layout_intent", 0,
1051                     sizeof(struct layout_intent), lustre_swab_layout_intent,
1052                     NULL);
1053 EXPORT_SYMBOL(RMF_LAYOUT_INTENT);
1054
1055 /*
1056  * OST request field.
1057  */
1058 struct req_msg_field RMF_OST_BODY =
1059         DEFINE_MSGF("ost_body", 0,
1060                     sizeof(struct ost_body), lustre_swab_ost_body, dump_ost_body);
1061 EXPORT_SYMBOL(RMF_OST_BODY);
1062
1063 struct req_msg_field RMF_OBD_IOOBJ =
1064         DEFINE_MSGF("obd_ioobj", RMF_F_STRUCT_ARRAY,
1065                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj, dump_ioo);
1066 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
1067
1068 struct req_msg_field RMF_NIOBUF_REMOTE =
1069         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY,
1070                     sizeof(struct niobuf_remote), lustre_swab_niobuf_remote,
1071                     dump_rniobuf);
1072 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
1073
1074 struct req_msg_field RMF_RCS =
1075         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1076                     lustre_swab_generic_32s, dump_rcs);
1077 EXPORT_SYMBOL(RMF_RCS);
1078
1079 struct req_msg_field RMF_EAVALS_LENS =
1080         DEFINE_MSGF("eavals_lens", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1081                 lustre_swab_generic_32s, NULL);
1082 EXPORT_SYMBOL(RMF_EAVALS_LENS);
1083
1084 struct req_msg_field RMF_OBD_ID =
1085         DEFINE_MSGF("u64", 0,
1086                     sizeof(u64), lustre_swab_ost_last_id, NULL);
1087 EXPORT_SYMBOL(RMF_OBD_ID);
1088
1089 struct req_msg_field RMF_FID =
1090         DEFINE_MSGF("fid", 0,
1091                     sizeof(struct lu_fid), lustre_swab_lu_fid, NULL);
1092 EXPORT_SYMBOL(RMF_FID);
1093
1094 struct req_msg_field RMF_OST_ID =
1095         DEFINE_MSGF("ost_id", 0,
1096                     sizeof(struct ost_id), lustre_swab_ost_id, NULL);
1097 EXPORT_SYMBOL(RMF_OST_ID);
1098
1099 struct req_msg_field RMF_FIEMAP_KEY =
1100         DEFINE_MSGF("fiemap", 0, sizeof(struct ll_fiemap_info_key),
1101                     lustre_swab_fiemap, NULL);
1102 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
1103
1104 struct req_msg_field RMF_FIEMAP_VAL =
1105         DEFINE_MSGF("fiemap", 0, -1, lustre_swab_fiemap, NULL);
1106 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
1107
1108 struct req_msg_field RMF_IDX_INFO =
1109         DEFINE_MSGF("idx_info", 0, sizeof(struct idx_info),
1110                     lustre_swab_idx_info, NULL);
1111 EXPORT_SYMBOL(RMF_IDX_INFO);
1112 struct req_msg_field RMF_HSM_USER_STATE =
1113         DEFINE_MSGF("hsm_user_state", 0, sizeof(struct hsm_user_state),
1114                     lustre_swab_hsm_user_state, NULL);
1115 EXPORT_SYMBOL(RMF_HSM_USER_STATE);
1116
1117 struct req_msg_field RMF_HSM_STATE_SET =
1118         DEFINE_MSGF("hsm_state_set", 0, sizeof(struct hsm_state_set),
1119                     lustre_swab_hsm_state_set, NULL);
1120 EXPORT_SYMBOL(RMF_HSM_STATE_SET);
1121
1122 struct req_msg_field RMF_MDS_HSM_PROGRESS =
1123         DEFINE_MSGF("hsm_progress", 0, sizeof(struct hsm_progress_kernel),
1124                     lustre_swab_hsm_progress_kernel, NULL);
1125 EXPORT_SYMBOL(RMF_MDS_HSM_PROGRESS);
1126
1127 struct req_msg_field RMF_MDS_HSM_CURRENT_ACTION =
1128         DEFINE_MSGF("hsm_current_action", 0, sizeof(struct hsm_current_action),
1129                     lustre_swab_hsm_current_action, NULL);
1130 EXPORT_SYMBOL(RMF_MDS_HSM_CURRENT_ACTION);
1131
1132 struct req_msg_field RMF_MDS_HSM_USER_ITEM =
1133         DEFINE_MSGF("hsm_user_item", RMF_F_STRUCT_ARRAY,
1134                     sizeof(struct hsm_user_item), lustre_swab_hsm_user_item,
1135                     NULL);
1136 EXPORT_SYMBOL(RMF_MDS_HSM_USER_ITEM);
1137
1138 struct req_msg_field RMF_MDS_HSM_ARCHIVE =
1139         DEFINE_MSGF("hsm_archive", 0,
1140                     sizeof(__u32), lustre_swab_generic_32s, NULL);
1141 EXPORT_SYMBOL(RMF_MDS_HSM_ARCHIVE);
1142
1143 struct req_msg_field RMF_MDS_HSM_REQUEST =
1144         DEFINE_MSGF("hsm_request", 0, sizeof(struct hsm_request),
1145                     lustre_swab_hsm_request, NULL);
1146 EXPORT_SYMBOL(RMF_MDS_HSM_REQUEST);
1147
1148 struct req_msg_field RMF_UPDATE = DEFINE_MSGF("update", 0, -1,
1149                                               lustre_swab_update_buf, NULL);
1150 EXPORT_SYMBOL(RMF_UPDATE);
1151
1152 struct req_msg_field RMF_UPDATE_REPLY = DEFINE_MSGF("update_reply", 0, -1,
1153                                                 lustre_swab_update_reply_buf,
1154                                                     NULL);
1155 EXPORT_SYMBOL(RMF_UPDATE_REPLY);
1156
1157 struct req_msg_field RMF_SWAP_LAYOUTS =
1158         DEFINE_MSGF("swap_layouts", 0, sizeof(struct  mdc_swap_layouts),
1159                     lustre_swab_swap_layouts, NULL);
1160 EXPORT_SYMBOL(RMF_SWAP_LAYOUTS);
1161 /*
1162  * Request formats.
1163  */
1164
1165 struct req_format {
1166         const char *rf_name;
1167         int rf_idx;
1168         struct {
1169                 int nr;
1170                 const struct req_msg_field **d;
1171         } rf_fields[RCL_NR];
1172 };
1173
1174 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
1175         .rf_name = name,                                                \
1176         .rf_fields = {                                                  \
1177                 [RCL_CLIENT] = {                                        \
1178                         .nr = client_nr,                                \
1179                         .d = client                                     \
1180                 },                                                      \
1181                 [RCL_SERVER] = {                                        \
1182                         .nr = server_nr,                                \
1183                         .d = server                                     \
1184                 }                                                       \
1185         }                                                               \
1186 }
1187
1188 #define DEFINE_REQ_FMT0(name, client, server)                             \
1189 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
1190
1191 struct req_format RQF_OBD_PING =
1192         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
1193 EXPORT_SYMBOL(RQF_OBD_PING);
1194
1195 struct req_format RQF_OBD_SET_INFO =
1196         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
1197 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
1198
1199 /* Read index file through the network */
1200 struct req_format RQF_OBD_IDX_READ =
1201         DEFINE_REQ_FMT0("OBD_IDX_READ",
1202                         obd_idx_read_client, obd_idx_read_server);
1203 EXPORT_SYMBOL(RQF_OBD_IDX_READ);
1204
1205 struct req_format RQF_SEC_CTX =
1206         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
1207 EXPORT_SYMBOL(RQF_SEC_CTX);
1208
1209 struct req_format RQF_MGS_TARGET_REG =
1210         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
1211                          mgs_target_info_only);
1212 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
1213
1214 struct req_format RQF_MGS_SET_INFO =
1215         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
1216                          mgs_set_info);
1217 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
1218
1219 struct req_format RQF_MGS_CONFIG_READ =
1220         DEFINE_REQ_FMT0("MGS_CONFIG_READ", mgs_config_read_client,
1221                          mgs_config_read_server);
1222 EXPORT_SYMBOL(RQF_MGS_CONFIG_READ);
1223
1224 struct req_format RQF_SEQ_QUERY =
1225         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
1226 EXPORT_SYMBOL(RQF_SEQ_QUERY);
1227
1228 struct req_format RQF_FLD_QUERY =
1229         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
1230 EXPORT_SYMBOL(RQF_FLD_QUERY);
1231
1232 struct req_format RQF_LOG_CANCEL =
1233         DEFINE_REQ_FMT0("OBD_LOG_CANCEL", log_cancel_client, empty);
1234 EXPORT_SYMBOL(RQF_LOG_CANCEL);
1235
1236 struct req_format RQF_MDS_QUOTACHECK =
1237         DEFINE_REQ_FMT0("MDS_QUOTACHECK", quotactl_only, empty);
1238 EXPORT_SYMBOL(RQF_MDS_QUOTACHECK);
1239
1240 struct req_format RQF_OST_QUOTACHECK =
1241         DEFINE_REQ_FMT0("OST_QUOTACHECK", quotactl_only, empty);
1242 EXPORT_SYMBOL(RQF_OST_QUOTACHECK);
1243
1244 struct req_format RQF_MDS_QUOTACTL =
1245         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
1246 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
1247
1248 struct req_format RQF_OST_QUOTACTL =
1249         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
1250 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
1251
1252 struct req_format RQF_QC_CALLBACK =
1253         DEFINE_REQ_FMT0("QC_CALLBACK", quotactl_only, empty);
1254 EXPORT_SYMBOL(RQF_QC_CALLBACK);
1255
1256 struct req_format RQF_QUOTA_DQACQ =
1257         DEFINE_REQ_FMT0("QUOTA_DQACQ", quota_body_only, quota_body_only);
1258 EXPORT_SYMBOL(RQF_QUOTA_DQACQ);
1259
1260 struct req_format RQF_LDLM_INTENT_QUOTA =
1261         DEFINE_REQ_FMT0("LDLM_INTENT_QUOTA",
1262                         ldlm_intent_quota_client,
1263                         ldlm_intent_quota_server);
1264 EXPORT_SYMBOL(RQF_LDLM_INTENT_QUOTA);
1265
1266 struct req_format RQF_MDS_GETSTATUS =
1267         DEFINE_REQ_FMT0("MDS_GETSTATUS", mdt_body_only, mdt_body_capa);
1268 EXPORT_SYMBOL(RQF_MDS_GETSTATUS);
1269
1270 struct req_format RQF_MDS_STATFS =
1271         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
1272 EXPORT_SYMBOL(RQF_MDS_STATFS);
1273
1274 struct req_format RQF_MDS_SYNC =
1275         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
1276 EXPORT_SYMBOL(RQF_MDS_SYNC);
1277
1278 struct req_format RQF_MDS_GETATTR =
1279         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
1280 EXPORT_SYMBOL(RQF_MDS_GETATTR);
1281
1282 struct req_format RQF_MDS_GETXATTR =
1283         DEFINE_REQ_FMT0("MDS_GETXATTR",
1284                         mds_getxattr_client, mds_getxattr_server);
1285 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
1286
1287 struct req_format RQF_MDS_GETATTR_NAME =
1288         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
1289                         mds_getattr_name_client, mds_getattr_server);
1290 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
1291
1292 struct req_format RQF_MDS_REINT =
1293         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
1294 EXPORT_SYMBOL(RQF_MDS_REINT);
1295
1296 struct req_format RQF_MDS_REINT_CREATE =
1297         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
1298                         mds_reint_create_client, mdt_body_capa);
1299 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
1300
1301 struct req_format RQF_MDS_REINT_CREATE_RMT_ACL =
1302         DEFINE_REQ_FMT0("MDS_REINT_CREATE_RMT_ACL",
1303                         mds_reint_create_rmt_acl_client, mdt_body_capa);
1304 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_RMT_ACL);
1305
1306 struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1307         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1308                         mds_reint_create_slave_client, mdt_body_capa);
1309 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1310
1311 struct req_format RQF_MDS_REINT_CREATE_SYM =
1312         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1313                         mds_reint_create_sym_client, mdt_body_capa);
1314 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1315
1316 struct req_format RQF_MDS_REINT_OPEN =
1317         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1318                         mds_reint_open_client, mds_reint_open_server);
1319 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1320
1321 struct req_format RQF_MDS_REINT_UNLINK =
1322         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1323                         mds_last_unlink_server);
1324 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1325
1326 struct req_format RQF_MDS_REINT_LINK =
1327         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1328                         mds_reint_link_client, mdt_body_only);
1329 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1330
1331 struct req_format RQF_MDS_REINT_RENAME =
1332         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1333                         mds_last_unlink_server);
1334 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1335
1336 struct req_format RQF_MDS_REINT_SETATTR =
1337         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1338                         mds_reint_setattr_client, mds_setattr_server);
1339 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1340
1341 struct req_format RQF_MDS_REINT_SETXATTR =
1342         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1343                         mds_reint_setxattr_client, mdt_body_only);
1344 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1345
1346 struct req_format RQF_MDS_CONNECT =
1347         DEFINE_REQ_FMT0("MDS_CONNECT",
1348                         obd_connect_client, obd_connect_server);
1349 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1350
1351 struct req_format RQF_MDS_DISCONNECT =
1352         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1353 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1354
1355 struct req_format RQF_MDS_GET_INFO =
1356         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1357                         mds_getinfo_server);
1358 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1359
1360 struct req_format RQF_UPDATE_OBJ =
1361         DEFINE_REQ_FMT0("OBJECT_UPDATE_OBJ", mds_update_client,
1362                         mds_update_server);
1363 EXPORT_SYMBOL(RQF_UPDATE_OBJ);
1364
1365 struct req_format RQF_LDLM_ENQUEUE =
1366         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1367                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1368 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1369
1370 struct req_format RQF_LDLM_ENQUEUE_LVB =
1371         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1372                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1373 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1374
1375 struct req_format RQF_LDLM_CONVERT =
1376         DEFINE_REQ_FMT0("LDLM_CONVERT",
1377                         ldlm_enqueue_client, ldlm_enqueue_server);
1378 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1379
1380 struct req_format RQF_LDLM_CANCEL =
1381         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1382 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1383
1384 struct req_format RQF_LDLM_CALLBACK =
1385         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1386 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1387
1388 struct req_format RQF_LDLM_CP_CALLBACK =
1389         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1390 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1391
1392 struct req_format RQF_LDLM_BL_CALLBACK =
1393         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1394 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1395
1396 struct req_format RQF_LDLM_GL_CALLBACK =
1397         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1398                         ldlm_gl_callback_server);
1399 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1400
1401 struct req_format RQF_LDLM_GL_DESC_CALLBACK =
1402         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_gl_callback_desc_client,
1403                         ldlm_gl_callback_server);
1404 EXPORT_SYMBOL(RQF_LDLM_GL_DESC_CALLBACK);
1405
1406 struct req_format RQF_LDLM_INTENT_BASIC =
1407         DEFINE_REQ_FMT0("LDLM_INTENT_BASIC",
1408                         ldlm_intent_basic_client, ldlm_enqueue_lvb_server);
1409 EXPORT_SYMBOL(RQF_LDLM_INTENT_BASIC);
1410
1411 struct req_format RQF_LDLM_INTENT =
1412         DEFINE_REQ_FMT0("LDLM_INTENT",
1413                         ldlm_intent_client, ldlm_intent_server);
1414 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1415
1416 struct req_format RQF_LDLM_INTENT_LAYOUT =
1417         DEFINE_REQ_FMT0("LDLM_INTENT_LAYOUT ",
1418                         ldlm_intent_layout_client, ldlm_enqueue_lvb_server);
1419 EXPORT_SYMBOL(RQF_LDLM_INTENT_LAYOUT);
1420
1421 struct req_format RQF_LDLM_INTENT_GETATTR =
1422         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1423                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1424 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1425
1426 struct req_format RQF_LDLM_INTENT_OPEN =
1427         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1428                         ldlm_intent_open_client, ldlm_intent_open_server);
1429 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1430
1431 struct req_format RQF_LDLM_INTENT_CREATE =
1432         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1433                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1434 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1435
1436 struct req_format RQF_LDLM_INTENT_UNLINK =
1437         DEFINE_REQ_FMT0("LDLM_INTENT_UNLINK",
1438                         ldlm_intent_unlink_client, ldlm_intent_server);
1439 EXPORT_SYMBOL(RQF_LDLM_INTENT_UNLINK);
1440
1441 struct req_format RQF_LDLM_INTENT_GETXATTR =
1442         DEFINE_REQ_FMT0("LDLM_INTENT_GETXATTR",
1443                         ldlm_intent_getxattr_client,
1444                         ldlm_intent_getxattr_server);
1445 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETXATTR);
1446
1447 struct req_format RQF_MDS_CLOSE =
1448         DEFINE_REQ_FMT0("MDS_CLOSE",
1449                         mdt_close_client, mds_last_unlink_server);
1450 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1451
1452 struct req_format RQF_MDS_RELEASE_CLOSE =
1453         DEFINE_REQ_FMT0("MDS_CLOSE",
1454                         mdt_release_close_client, mds_last_unlink_server);
1455 EXPORT_SYMBOL(RQF_MDS_RELEASE_CLOSE);
1456
1457 struct req_format RQF_MDS_PIN =
1458         DEFINE_REQ_FMT0("MDS_PIN",
1459                         mdt_body_capa, mdt_body_only);
1460 EXPORT_SYMBOL(RQF_MDS_PIN);
1461
1462 struct req_format RQF_MDS_UNPIN =
1463         DEFINE_REQ_FMT0("MDS_UNPIN", mdt_body_only, empty);
1464 EXPORT_SYMBOL(RQF_MDS_UNPIN);
1465
1466 struct req_format RQF_MDS_DONE_WRITING =
1467         DEFINE_REQ_FMT0("MDS_DONE_WRITING",
1468                         mdt_close_client, mdt_body_only);
1469 EXPORT_SYMBOL(RQF_MDS_DONE_WRITING);
1470
1471 struct req_format RQF_MDS_READPAGE =
1472         DEFINE_REQ_FMT0("MDS_READPAGE",
1473                         mdt_body_capa, mdt_body_only);
1474 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1475
1476 struct req_format RQF_MDS_HSM_ACTION =
1477         DEFINE_REQ_FMT0("MDS_HSM_ACTION", mdt_body_capa, mdt_hsm_action_server);
1478 EXPORT_SYMBOL(RQF_MDS_HSM_ACTION);
1479
1480 struct req_format RQF_MDS_HSM_PROGRESS =
1481         DEFINE_REQ_FMT0("MDS_HSM_PROGRESS", mdt_hsm_progress, empty);
1482 EXPORT_SYMBOL(RQF_MDS_HSM_PROGRESS);
1483
1484 struct req_format RQF_MDS_HSM_CT_REGISTER =
1485         DEFINE_REQ_FMT0("MDS_HSM_CT_REGISTER", mdt_hsm_ct_register, empty);
1486 EXPORT_SYMBOL(RQF_MDS_HSM_CT_REGISTER);
1487
1488 struct req_format RQF_MDS_HSM_CT_UNREGISTER =
1489         DEFINE_REQ_FMT0("MDS_HSM_CT_UNREGISTER", mdt_hsm_ct_unregister, empty);
1490 EXPORT_SYMBOL(RQF_MDS_HSM_CT_UNREGISTER);
1491
1492 struct req_format RQF_MDS_HSM_STATE_GET =
1493         DEFINE_REQ_FMT0("MDS_HSM_STATE_GET",
1494                         mdt_body_capa, mdt_hsm_state_get_server);
1495 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_GET);
1496
1497 struct req_format RQF_MDS_HSM_STATE_SET =
1498         DEFINE_REQ_FMT0("MDS_HSM_STATE_SET", mdt_hsm_state_set, empty);
1499 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_SET);
1500
1501 struct req_format RQF_MDS_HSM_REQUEST =
1502         DEFINE_REQ_FMT0("MDS_HSM_REQUEST", mdt_hsm_request, empty);
1503 EXPORT_SYMBOL(RQF_MDS_HSM_REQUEST);
1504
1505 struct req_format RQF_MDS_SWAP_LAYOUTS =
1506         DEFINE_REQ_FMT0("MDS_SWAP_LAYOUTS",
1507                         mdt_swap_layouts, empty);
1508 EXPORT_SYMBOL(RQF_MDS_SWAP_LAYOUTS);
1509
1510 /* This is for split */
1511 struct req_format RQF_MDS_WRITEPAGE =
1512         DEFINE_REQ_FMT0("MDS_WRITEPAGE",
1513                         mdt_body_capa, mdt_body_only);
1514 EXPORT_SYMBOL(RQF_MDS_WRITEPAGE);
1515
1516 struct req_format RQF_MDS_IS_SUBDIR =
1517         DEFINE_REQ_FMT0("MDS_IS_SUBDIR",
1518                         mdt_body_only, mdt_body_only);
1519 EXPORT_SYMBOL(RQF_MDS_IS_SUBDIR);
1520
1521 struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1522         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1523                         llog_origin_handle_create_client, llogd_body_only);
1524 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1525
1526 struct req_format RQF_LLOG_ORIGIN_HANDLE_DESTROY =
1527         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_DESTROY",
1528                         llogd_body_only, llogd_body_only);
1529 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_DESTROY);
1530
1531 struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1532         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1533                         llogd_body_only, llog_origin_handle_next_block_server);
1534 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1535
1536 struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1537         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1538                         llogd_body_only, llog_origin_handle_next_block_server);
1539 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1540
1541 struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1542         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1543                         llogd_body_only, llog_log_hdr_only);
1544 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1545
1546 struct req_format RQF_LLOG_ORIGIN_CONNECT =
1547         DEFINE_REQ_FMT0("LLOG_ORIGIN_CONNECT", llogd_conn_body_only, empty);
1548 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_CONNECT);
1549
1550 struct req_format RQF_CONNECT =
1551         DEFINE_REQ_FMT0("CONNECT", obd_connect_client, obd_connect_server);
1552 EXPORT_SYMBOL(RQF_CONNECT);
1553
1554 struct req_format RQF_OST_CONNECT =
1555         DEFINE_REQ_FMT0("OST_CONNECT",
1556                         obd_connect_client, obd_connect_server);
1557 EXPORT_SYMBOL(RQF_OST_CONNECT);
1558
1559 struct req_format RQF_OST_DISCONNECT =
1560         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1561 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1562
1563 struct req_format RQF_OST_GETATTR =
1564         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1565 EXPORT_SYMBOL(RQF_OST_GETATTR);
1566
1567 struct req_format RQF_OST_SETATTR =
1568         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1569 EXPORT_SYMBOL(RQF_OST_SETATTR);
1570
1571 struct req_format RQF_OST_CREATE =
1572         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1573 EXPORT_SYMBOL(RQF_OST_CREATE);
1574
1575 struct req_format RQF_OST_PUNCH =
1576         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1577 EXPORT_SYMBOL(RQF_OST_PUNCH);
1578
1579 struct req_format RQF_OST_SYNC =
1580         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1581 EXPORT_SYMBOL(RQF_OST_SYNC);
1582
1583 struct req_format RQF_OST_DESTROY =
1584         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1585 EXPORT_SYMBOL(RQF_OST_DESTROY);
1586
1587 struct req_format RQF_OST_BRW_READ =
1588         DEFINE_REQ_FMT0("OST_BRW_READ", ost_brw_client, ost_brw_read_server);
1589 EXPORT_SYMBOL(RQF_OST_BRW_READ);
1590
1591 struct req_format RQF_OST_BRW_WRITE =
1592         DEFINE_REQ_FMT0("OST_BRW_WRITE", ost_brw_client, ost_brw_write_server);
1593 EXPORT_SYMBOL(RQF_OST_BRW_WRITE);
1594
1595 struct req_format RQF_OST_STATFS =
1596         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1597 EXPORT_SYMBOL(RQF_OST_STATFS);
1598
1599 struct req_format RQF_OST_SET_GRANT_INFO =
1600         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", ost_grant_shrink_client,
1601                          ost_body_only);
1602 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1603
1604 struct req_format RQF_OST_GET_INFO_GENERIC =
1605         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1606                                         ost_get_info_generic_server);
1607 EXPORT_SYMBOL(RQF_OST_GET_INFO_GENERIC);
1608
1609 struct req_format RQF_OST_GET_INFO_LAST_ID =
1610         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1611                                                 ost_get_last_id_server);
1612 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1613
1614 struct req_format RQF_OST_GET_INFO_LAST_FID =
1615         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_FID", obd_set_info_client,
1616                                                  ost_get_last_fid_server);
1617 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_FID);
1618
1619 struct req_format RQF_OST_SET_INFO_LAST_FID =
1620         DEFINE_REQ_FMT0("OST_SET_INFO_LAST_FID", obd_set_info_client,
1621                                                  empty);
1622 EXPORT_SYMBOL(RQF_OST_SET_INFO_LAST_FID);
1623
1624 struct req_format RQF_OST_GET_INFO_FIEMAP =
1625         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1626                                                ost_get_fiemap_server);
1627 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1628
1629 #if !defined(__REQ_LAYOUT_USER__)
1630
1631 /* Convenience macro */
1632 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1633
1634 /**
1635  * Initializes the capsule abstraction by computing and setting the \a rf_idx
1636  * field of RQFs and the \a rmf_offset field of RMFs.
1637  */
1638 int req_layout_init(void)
1639 {
1640         int i;
1641         int j;
1642         int k;
1643         struct req_format *rf = NULL;
1644
1645         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1646                 rf = req_formats[i];
1647                 rf->rf_idx = i;
1648                 for (j = 0; j < RCL_NR; ++j) {
1649                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1650                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1651                                 struct req_msg_field *field;
1652
1653                                 field = (typeof(field))rf->rf_fields[j].d[k];
1654                                 LASSERT(!(field->rmf_flags & RMF_F_STRUCT_ARRAY)
1655                                         || field->rmf_size > 0);
1656                                 LASSERT(field->rmf_offset[i][j] == 0);
1657                                 /*
1658                                  * k + 1 to detect unused format/field
1659                                  * combinations.
1660                                  */
1661                                 field->rmf_offset[i][j] = k + 1;
1662                         }
1663                 }
1664         }
1665         return 0;
1666 }
1667 EXPORT_SYMBOL(req_layout_init);
1668
1669 void req_layout_fini(void)
1670 {
1671 }
1672 EXPORT_SYMBOL(req_layout_fini);
1673
1674 /**
1675  * Initializes the expected sizes of each RMF in a \a pill (\a rc_area) to -1.
1676  *
1677  * Actual/expected field sizes are set elsewhere in functions in this file:
1678  * req_capsule_init(), req_capsule_server_pack(), req_capsule_set_size() and
1679  * req_capsule_msg_size().  The \a rc_area information is used by.
1680  * ptlrpc_request_set_replen().
1681  */
1682 static void req_capsule_init_area(struct req_capsule *pill)
1683 {
1684         int i;
1685
1686         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1687                 pill->rc_area[RCL_CLIENT][i] = -1;
1688                 pill->rc_area[RCL_SERVER][i] = -1;
1689         }
1690 }
1691
1692 /**
1693  * Initialize a pill.
1694  *
1695  * The \a location indicates whether the caller is executing on the client side
1696  * (RCL_CLIENT) or server side (RCL_SERVER)..
1697  */
1698 void req_capsule_init(struct req_capsule *pill,
1699                       struct ptlrpc_request *req,
1700                       enum req_location location)
1701 {
1702         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1703
1704         /*
1705          * Today all capsules are embedded in ptlrpc_request structs,
1706          * but just in case that ever isn't the case, we don't reach
1707          * into req unless req != NULL and pill is the one embedded in
1708          * the req.
1709          *
1710          * The req->rq_pill_init flag makes it safe to initialize a pill
1711          * twice, which might happen in the OST paths as a result of the
1712          * high-priority RPC queue getting peeked at before ost_handle()
1713          * handles an OST RPC.
1714          */
1715         if (req != NULL && pill == &req->rq_pill && req->rq_pill_init)
1716                 return;
1717
1718         memset(pill, 0, sizeof(*pill));
1719         pill->rc_req = req;
1720         pill->rc_loc = location;
1721         req_capsule_init_area(pill);
1722
1723         if (req != NULL && pill == &req->rq_pill)
1724                 req->rq_pill_init = 1;
1725 }
1726 EXPORT_SYMBOL(req_capsule_init);
1727
1728 void req_capsule_fini(struct req_capsule *pill)
1729 {
1730 }
1731 EXPORT_SYMBOL(req_capsule_fini);
1732
1733 static int __req_format_is_sane(const struct req_format *fmt)
1734 {
1735         return
1736                 0 <= fmt->rf_idx && fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1737                 req_formats[fmt->rf_idx] == fmt;
1738 }
1739
1740 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1741                                     enum req_location loc)
1742 {
1743         struct ptlrpc_request *req;
1744
1745         req = pill->rc_req;
1746         return loc == RCL_CLIENT ? req->rq_reqmsg : req->rq_repmsg;
1747 }
1748
1749 /**
1750  * Set the format (\a fmt) of a \a pill; format changes are not allowed here
1751  * (see req_capsule_extend()).
1752  */
1753 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1754 {
1755         LASSERT(pill->rc_fmt == NULL || pill->rc_fmt == fmt);
1756         LASSERT(__req_format_is_sane(fmt));
1757
1758         pill->rc_fmt = fmt;
1759 }
1760 EXPORT_SYMBOL(req_capsule_set);
1761
1762 /**
1763  * Fills in any parts of the \a rc_area of a \a pill that haven't been filled in
1764  * yet.
1765
1766  * \a rc_area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1767  * variable-sized fields.  The field sizes come from the declared \a rmf_size
1768  * field of a \a pill's \a rc_fmt's RMF's.
1769  */
1770 int req_capsule_filled_sizes(struct req_capsule *pill,
1771                              enum req_location loc)
1772 {
1773         const struct req_format *fmt = pill->rc_fmt;
1774         int i;
1775
1776         LASSERT(fmt != NULL);
1777
1778         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1779                 if (pill->rc_area[loc][i] == -1) {
1780                         pill->rc_area[loc][i] =
1781                                             fmt->rf_fields[loc].d[i]->rmf_size;
1782                         if (pill->rc_area[loc][i] == -1) {
1783                                 /*
1784                                  * Skip the following fields.
1785                                  *
1786                                  * If this LASSERT() trips then you're missing a
1787                                  * call to req_capsule_set_size().
1788                                  */
1789                                 LASSERT(loc != RCL_SERVER);
1790                                 break;
1791                         }
1792                 }
1793         }
1794         return i;
1795 }
1796 EXPORT_SYMBOL(req_capsule_filled_sizes);
1797
1798 /**
1799  * Capsule equivalent of lustre_pack_request() and lustre_pack_reply().
1800  *
1801  * This function uses the \a pill's \a rc_area as filled in by
1802  * req_capsule_set_size() or req_capsule_filled_sizes() (the latter is called by
1803  * this function).
1804  */
1805 int req_capsule_server_pack(struct req_capsule *pill)
1806 {
1807         const struct req_format *fmt;
1808         int count;
1809         int rc;
1810
1811         LASSERT(pill->rc_loc == RCL_SERVER);
1812         fmt = pill->rc_fmt;
1813         LASSERT(fmt != NULL);
1814
1815         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1816         rc = lustre_pack_reply(pill->rc_req, count,
1817                                pill->rc_area[RCL_SERVER], NULL);
1818         if (rc != 0) {
1819                 DEBUG_REQ(D_ERROR, pill->rc_req,
1820                        "Cannot pack %d fields in format `%s': ",
1821                        count, fmt->rf_name);
1822         }
1823         return rc;
1824 }
1825 EXPORT_SYMBOL(req_capsule_server_pack);
1826
1827 /**
1828  * Returns the PTLRPC request or reply (\a loc) buffer offset of a \a pill
1829  * corresponding to the given RMF (\a field).
1830  */
1831 static int __req_capsule_offset(const struct req_capsule *pill,
1832                                 const struct req_msg_field *field,
1833                                 enum req_location loc)
1834 {
1835         int offset;
1836
1837         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
1838         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
1839                             pill->rc_fmt->rf_name,
1840                             field->rmf_name, offset, loc);
1841         offset--;
1842
1843         LASSERT(0 <= offset && offset < REQ_MAX_FIELD_NR);
1844         return offset;
1845 }
1846
1847 /**
1848  * Helper for __req_capsule_get(); swabs value / array of values and/or dumps
1849  * them if desired.
1850  */
1851 static
1852 void
1853 swabber_dumper_helper(struct req_capsule *pill,
1854                       const struct req_msg_field *field,
1855                       enum req_location loc,
1856                       int offset,
1857                       void *value, int len, int dump, void (*swabber)(void *))
1858 {
1859         void *p;
1860         int i;
1861         int n;
1862         int do_swab;
1863         int inout = loc == RCL_CLIENT;
1864
1865         swabber = swabber ?: field->rmf_swabber;
1866
1867         if (ptlrpc_buf_need_swab(pill->rc_req, inout, offset) &&
1868             swabber != NULL && value != NULL)
1869                 do_swab = 1;
1870         else
1871                 do_swab = 0;
1872
1873         if (!field->rmf_dumper)
1874                 dump = 0;
1875
1876         if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY)) {
1877                 if (dump) {
1878                         CDEBUG(D_RPCTRACE, "Dump of %sfield %s follows\n",
1879                                do_swab ? "unswabbed " : "", field->rmf_name);
1880                         field->rmf_dumper(value);
1881                 }
1882                 if (!do_swab)
1883                         return;
1884                 swabber(value);
1885                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1886                 if (dump) {
1887                         CDEBUG(D_RPCTRACE, "Dump of swabbed field %s follows\n",
1888                                field->rmf_name);
1889                         field->rmf_dumper(value);
1890                 }
1891
1892                 return;
1893         }
1894
1895         /*
1896          * We're swabbing an array; swabber() swabs a single array element, so
1897          * swab every element.
1898          */
1899         LASSERT((len % field->rmf_size) == 0);
1900         for (p = value, i = 0, n = len / field->rmf_size;
1901              i < n;
1902              i++, p += field->rmf_size) {
1903                 if (dump) {
1904                         CDEBUG(D_RPCTRACE, "Dump of %sarray field %s, element %d follows\n",
1905                                do_swab ? "unswabbed " : "", field->rmf_name, i);
1906                         field->rmf_dumper(p);
1907                 }
1908                 if (!do_swab)
1909                         continue;
1910                 swabber(p);
1911                 if (dump) {
1912                         CDEBUG(D_RPCTRACE, "Dump of swabbed array field %s, element %d follows\n",
1913                                field->rmf_name, i);
1914                         field->rmf_dumper(value);
1915                 }
1916         }
1917         if (do_swab)
1918                 ptlrpc_buf_set_swabbed(pill->rc_req, inout, offset);
1919 }
1920
1921 /**
1922  * Returns the pointer to a PTLRPC request or reply (\a loc) buffer of a \a pill
1923  * corresponding to the given RMF (\a field).
1924  *
1925  * The buffer will be swabbed using the given \a swabber.  If \a swabber == NULL
1926  * then the \a rmf_swabber from the RMF will be used.  Soon there will be no
1927  * calls to __req_capsule_get() with a non-NULL \a swabber; \a swabber will then
1928  * be removed.  Fields with the \a RMF_F_STRUCT_ARRAY flag set will have each
1929  * element of the array swabbed.
1930  */
1931 static void *__req_capsule_get(struct req_capsule *pill,
1932                                const struct req_msg_field *field,
1933                                enum req_location loc,
1934                                void (*swabber)(void *),
1935                                int dump)
1936 {
1937         const struct req_format *fmt;
1938         struct lustre_msg *msg;
1939         void *value;
1940         int len;
1941         int offset;
1942
1943         void *(*getter)(struct lustre_msg *m, int n, int minlen);
1944
1945         static const char *rcl_names[RCL_NR] = {
1946                 [RCL_CLIENT] = "client",
1947                 [RCL_SERVER] = "server"
1948         };
1949
1950         LASSERT(pill != NULL);
1951         LASSERT(pill != LP_POISON);
1952         fmt = pill->rc_fmt;
1953         LASSERT(fmt != NULL);
1954         LASSERT(fmt != LP_POISON);
1955         LASSERT(__req_format_is_sane(fmt));
1956
1957         offset = __req_capsule_offset(pill, field, loc);
1958
1959         msg = __req_msg(pill, loc);
1960         LASSERT(msg != NULL);
1961
1962         getter = (field->rmf_flags & RMF_F_STRING) ?
1963                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
1964
1965         if (field->rmf_flags & RMF_F_STRUCT_ARRAY) {
1966                 /*
1967                  * We've already asserted that field->rmf_size > 0 in
1968                  * req_layout_init().
1969                  */
1970                 len = lustre_msg_buflen(msg, offset);
1971                 if ((len % field->rmf_size) != 0) {
1972                         CERROR("%s: array field size mismatch %d modulo %d != 0 (%d)\n",
1973                                field->rmf_name, len, field->rmf_size, loc);
1974                         return NULL;
1975                 }
1976         } else if (pill->rc_area[loc][offset] != -1) {
1977                 len = pill->rc_area[loc][offset];
1978         } else {
1979                 len = max(field->rmf_size, 0);
1980         }
1981         value = getter(msg, offset, len);
1982
1983         if (value == NULL) {
1984                 DEBUG_REQ(D_ERROR, pill->rc_req,
1985                           "Wrong buffer for field `%s' (%d of %d) in format `%s': %d vs. %d (%s)\n",
1986                           field->rmf_name, offset, lustre_msg_bufcount(msg),
1987                           fmt->rf_name, lustre_msg_buflen(msg, offset), len,
1988                           rcl_names[loc]);
1989         } else {
1990                 swabber_dumper_helper(pill, field, loc, offset, value, len,
1991                                       dump, swabber);
1992         }
1993
1994         return value;
1995 }
1996
1997 /**
1998  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC request
1999  * buffer corresponding to the given RMF (\a field) of a \a pill.
2000  */
2001 void *req_capsule_client_get(struct req_capsule *pill,
2002                              const struct req_msg_field *field)
2003 {
2004         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
2005 }
2006 EXPORT_SYMBOL(req_capsule_client_get);
2007
2008 /**
2009  * Same as req_capsule_client_get(), but with a \a swabber argument.
2010  *
2011  * Currently unused; will be removed when req_capsule_server_swab_get() is
2012  * unused too.
2013  */
2014 void *req_capsule_client_swab_get(struct req_capsule *pill,
2015                                   const struct req_msg_field *field,
2016                                   void *swabber)
2017 {
2018         return __req_capsule_get(pill, field, RCL_CLIENT, swabber, 0);
2019 }
2020 EXPORT_SYMBOL(req_capsule_client_swab_get);
2021
2022 /**
2023  * Utility that combines req_capsule_set_size() and req_capsule_client_get().
2024  *
2025  * First the \a pill's request \a field's size is set (\a rc_area) using
2026  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2027  * returned.
2028  */
2029 void *req_capsule_client_sized_get(struct req_capsule *pill,
2030                                    const struct req_msg_field *field,
2031                                    int len)
2032 {
2033         req_capsule_set_size(pill, field, RCL_CLIENT, len);
2034         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, 0);
2035 }
2036 EXPORT_SYMBOL(req_capsule_client_sized_get);
2037
2038 /**
2039  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC reply
2040  * buffer corresponding to the given RMF (\a field) of a \a pill.
2041  */
2042 void *req_capsule_server_get(struct req_capsule *pill,
2043                              const struct req_msg_field *field)
2044 {
2045         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
2046 }
2047 EXPORT_SYMBOL(req_capsule_server_get);
2048
2049 /**
2050  * Same as req_capsule_server_get(), but with a \a swabber argument.
2051  *
2052  * Ideally all swabbing should be done pursuant to RMF definitions, with no
2053  * swabbing done outside this capsule abstraction.
2054  */
2055 void *req_capsule_server_swab_get(struct req_capsule *pill,
2056                                   const struct req_msg_field *field,
2057                                   void *swabber)
2058 {
2059         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
2060 }
2061 EXPORT_SYMBOL(req_capsule_server_swab_get);
2062
2063 /**
2064  * Utility that combines req_capsule_set_size() and req_capsule_server_get().
2065  *
2066  * First the \a pill's request \a field's size is set (\a rc_area) using
2067  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2068  * returned.
2069  */
2070 void *req_capsule_server_sized_get(struct req_capsule *pill,
2071                                    const struct req_msg_field *field,
2072                                    int len)
2073 {
2074         req_capsule_set_size(pill, field, RCL_SERVER, len);
2075         return __req_capsule_get(pill, field, RCL_SERVER, NULL, 0);
2076 }
2077 EXPORT_SYMBOL(req_capsule_server_sized_get);
2078
2079 void *req_capsule_server_sized_swab_get(struct req_capsule *pill,
2080                                         const struct req_msg_field *field,
2081                                         int len, void *swabber)
2082 {
2083         req_capsule_set_size(pill, field, RCL_SERVER, len);
2084         return __req_capsule_get(pill, field, RCL_SERVER, swabber, 0);
2085 }
2086 EXPORT_SYMBOL(req_capsule_server_sized_swab_get);
2087
2088 /**
2089  * Set the size of the PTLRPC request/reply (\a loc) buffer for the given \a
2090  * field of the given \a pill.
2091  *
2092  * This function must be used when constructing variable sized fields of a
2093  * request or reply.
2094  */
2095 void req_capsule_set_size(struct req_capsule *pill,
2096                           const struct req_msg_field *field,
2097                           enum req_location loc, int size)
2098 {
2099         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2100
2101         if ((size != field->rmf_size) &&
2102             (field->rmf_size != -1) &&
2103             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
2104             (size > 0)) {
2105                 if ((field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2106                     (size % field->rmf_size != 0)) {
2107                         CERROR("%s: array field size mismatch %d %% %d != 0 (%d)\n",
2108                                field->rmf_name, size, field->rmf_size, loc);
2109                         LBUG();
2110                 } else if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2111                     size < field->rmf_size) {
2112                         CERROR("%s: field size mismatch %d != %d (%d)\n",
2113                                field->rmf_name, size, field->rmf_size, loc);
2114                         LBUG();
2115                 }
2116         }
2117
2118         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
2119 }
2120 EXPORT_SYMBOL(req_capsule_set_size);
2121
2122 /**
2123  * Return the actual PTLRPC buffer length of a request or reply (\a loc)
2124  * for the given \a pill's given \a field.
2125  *
2126  * NB: this function doesn't correspond with req_capsule_set_size(), which
2127  * actually sets the size in pill.rc_area[loc][offset], but this function
2128  * returns the message buflen[offset], maybe we should use another name.
2129  */
2130 int req_capsule_get_size(const struct req_capsule *pill,
2131                          const struct req_msg_field *field,
2132                          enum req_location loc)
2133 {
2134         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2135
2136         return lustre_msg_buflen(__req_msg(pill, loc),
2137                                  __req_capsule_offset(pill, field, loc));
2138 }
2139 EXPORT_SYMBOL(req_capsule_get_size);
2140
2141 /**
2142  * Wrapper around lustre_msg_size() that returns the PTLRPC size needed for the
2143  * given \a pill's request or reply (\a loc) given the field size recorded in
2144  * the \a pill's rc_area.
2145  *
2146  * See also req_capsule_set_size().
2147  */
2148 int req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
2149 {
2150         return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
2151                                pill->rc_fmt->rf_fields[loc].nr,
2152                                pill->rc_area[loc]);
2153 }
2154
2155 /**
2156  * While req_capsule_msg_size() computes the size of a PTLRPC request or reply
2157  * (\a loc) given a \a pill's \a rc_area, this function computes the size of a
2158  * PTLRPC request or reply given only an RQF (\a fmt).
2159  *
2160  * This function should not be used for formats which contain variable size
2161  * fields.
2162  */
2163 int req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
2164                          enum req_location loc)
2165 {
2166         int size, i = 0;
2167
2168         /*
2169          * This function should probably LASSERT() that fmt has no fields with
2170          * RMF_F_STRUCT_ARRAY in rmf_flags, since we can't know here how many
2171          * elements in the array there will ultimately be, but then, we could
2172          * assume that there will be at least one element, and that's just what
2173          * we do.
2174          */
2175         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
2176         if (size < 0)
2177                 return size;
2178
2179         for (; i < fmt->rf_fields[loc].nr; ++i)
2180                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
2181                         size += cfs_size_round(fmt->rf_fields[loc].d[i]->
2182                                                rmf_size);
2183         return size;
2184 }
2185
2186 /**
2187  * Changes the format of an RPC.
2188  *
2189  * The pill must already have been initialized, which means that it already has
2190  * a request format.  The new format \a fmt must be an extension of the pill's
2191  * old format.  Specifically: the new format must have as many request and reply
2192  * fields as the old one, and all fields shared by the old and new format must
2193  * be at least as large in the new format.
2194  *
2195  * The new format's fields may be of different "type" than the old format, but
2196  * only for fields that are "opaque" blobs: fields which have a) have no
2197  * \a rmf_swabber, b) \a rmf_flags == 0 or RMF_F_NO_SIZE_CHECK, and c) \a
2198  * rmf_size == -1 or \a rmf_flags == RMF_F_NO_SIZE_CHECK.  For example,
2199  * OBD_SET_INFO has a key field and an opaque value field that gets interpreted
2200  * according to the key field.  When the value, according to the key, contains a
2201  * structure (or array thereof) to be swabbed, the format should be changed to
2202  * one where the value field has \a rmf_size/rmf_flags/rmf_swabber set
2203  * accordingly.
2204  */
2205 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
2206 {
2207         int i;
2208         int j;
2209
2210         const struct req_format *old;
2211
2212         LASSERT(pill->rc_fmt != NULL);
2213         LASSERT(__req_format_is_sane(fmt));
2214
2215         old = pill->rc_fmt;
2216         /*
2217          * Sanity checking...
2218          */
2219         for (i = 0; i < RCL_NR; ++i) {
2220                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
2221                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
2222                         const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
2223
2224                         /* "opaque" fields can be transmogrified */
2225                         if (ofield->rmf_swabber == NULL &&
2226                             (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
2227                             (ofield->rmf_size == -1 ||
2228                             ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
2229                                 continue;
2230                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
2231                 }
2232                 /*
2233                  * Last field in old format can be shorter than in new.
2234                  */
2235                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
2236                         FMT_FIELD(old, i, j)->rmf_size);
2237         }
2238
2239         pill->rc_fmt = fmt;
2240 }
2241 EXPORT_SYMBOL(req_capsule_extend);
2242
2243 /**
2244  * This function returns a non-zero value if the given \a field is present in
2245  * the format (\a rc_fmt) of \a pill's PTLRPC request or reply (\a loc), else it
2246  * returns 0.
2247  */
2248 int req_capsule_has_field(const struct req_capsule *pill,
2249                           const struct req_msg_field *field,
2250                           enum req_location loc)
2251 {
2252         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2253
2254         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
2255 }
2256 EXPORT_SYMBOL(req_capsule_has_field);
2257
2258 /**
2259  * Returns a non-zero value if the given \a field is present in the given \a
2260  * pill's PTLRPC request or reply (\a loc), else it returns 0.
2261  */
2262 static int req_capsule_field_present(const struct req_capsule *pill,
2263                                      const struct req_msg_field *field,
2264                                      enum req_location loc)
2265 {
2266         int offset;
2267
2268         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2269         LASSERT(req_capsule_has_field(pill, field, loc));
2270
2271         offset = __req_capsule_offset(pill, field, loc);
2272         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
2273 }
2274
2275 /**
2276  * This function shrinks the size of the _buffer_ of the \a pill's PTLRPC
2277  * request or reply (\a loc).
2278  *
2279  * This is not the opposite of req_capsule_extend().
2280  */
2281 void req_capsule_shrink(struct req_capsule *pill,
2282                         const struct req_msg_field *field,
2283                         unsigned int newlen,
2284                         enum req_location loc)
2285 {
2286         const struct req_format *fmt;
2287         struct lustre_msg *msg;
2288         int len;
2289         int offset;
2290
2291         fmt = pill->rc_fmt;
2292         LASSERT(fmt != NULL);
2293         LASSERT(__req_format_is_sane(fmt));
2294         LASSERT(req_capsule_has_field(pill, field, loc));
2295         LASSERT(req_capsule_field_present(pill, field, loc));
2296
2297         offset = __req_capsule_offset(pill, field, loc);
2298
2299         msg = __req_msg(pill, loc);
2300         len = lustre_msg_buflen(msg, offset);
2301         LASSERTF(newlen <= len, "%s:%s, oldlen=%d, newlen=%d\n",
2302                                 fmt->rf_name, field->rmf_name, len, newlen);
2303
2304         if (loc == RCL_CLIENT)
2305                 pill->rc_req->rq_reqlen = lustre_shrink_msg(msg, offset, newlen,
2306                                                             1);
2307         else
2308                 pill->rc_req->rq_replen = lustre_shrink_msg(msg, offset, newlen,
2309                                                             1);
2310 }
2311 EXPORT_SYMBOL(req_capsule_shrink);
2312
2313 /* __REQ_LAYOUT_USER__ */
2314 #endif