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