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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/ptlrpc/layout.c
  32  *
  33  * Lustre Metadata Target (mdt) request handler
  34  *
  35  * Author: Nikita Danilov <nikita@clusterfs.com>
  36  */
  37 /*
  38  * This file contains the "capsule/pill" abstraction layered above PTLRPC.
  39  *
  40  * Every struct ptlrpc_request contains a "pill", which points to a description
  41  * of the format that the request conforms to.
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_RPC
  45
  46 #include <linux/module.h>
  47
  48 #include <llog_swab.h>
  49 #include <lustre_swab.h>
  50 #include <obd.h>
  51 #include <obd_support.h>
  52
  53 /* struct ptlrpc_request, lustre_msg* */
  54 #include <lustre_req_layout.h>
  55 #include <lustre_acl.h>
  56 #include <lustre_nodemap.h>
  57
  58 /*
  59  * RQFs (see below) refer to two struct req_msg_field arrays describing the
  60  * client request and server reply, respectively.
  61  */
  62 /* empty set of fields... for suitable definition of emptiness. */
  63 static const struct req_msg_field *empty[] = {
  64         &RMF_PTLRPC_BODY
  65 };
  66
  67 static const struct req_msg_field *mgs_target_info_only[] = {
  68         &RMF_PTLRPC_BODY,
  69         &RMF_MGS_TARGET_INFO
  70 };
  71
  72 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 18, 53, 0)
  73 static const struct req_msg_field *mgs_set_info[] = {
  74         &RMF_PTLRPC_BODY,
  75         &RMF_MGS_SEND_PARAM
  76 };
  77 #endif
  78
  79 static const struct req_msg_field *mgs_config_read_client[] = {
  80         &RMF_PTLRPC_BODY,
  81         &RMF_MGS_CONFIG_BODY
  82 };
  83
  84 static const struct req_msg_field *mgs_config_read_server[] = {
  85         &RMF_PTLRPC_BODY,
  86         &RMF_MGS_CONFIG_RES
  87 };
  88
  89 static const struct req_msg_field *mdt_body_only[] = {
  90         &RMF_PTLRPC_BODY,
  91         &RMF_MDT_BODY
  92 };
  93
  94 static const struct req_msg_field *mdt_body_capa[] = {
  95         &RMF_PTLRPC_BODY,
  96         &RMF_MDT_BODY,
  97         &RMF_CAPA1
  98 };
  99
 100 static const struct req_msg_field *quotactl_only[] = {
 101         &RMF_PTLRPC_BODY,
 102         &RMF_OBD_QUOTACTL
 103 };
 104
 105 static const struct req_msg_field *quota_body_only[] = {
 106         &RMF_PTLRPC_BODY,
 107         &RMF_QUOTA_BODY
 108 };
 109
 110 static const struct req_msg_field *ldlm_intent_quota_client[] = {
 111         &RMF_PTLRPC_BODY,
 112         &RMF_DLM_REQ,
 113         &RMF_LDLM_INTENT,
 114         &RMF_QUOTA_BODY
 115 };
 116
 117 static const struct req_msg_field *ldlm_intent_quota_server[] = {
 118         &RMF_PTLRPC_BODY,
 119         &RMF_DLM_REP,
 120         &RMF_DLM_LVB,
 121         &RMF_QUOTA_BODY
 122 };
 123
 124 static const struct req_msg_field *mdt_close_client[] = {
 125         &RMF_PTLRPC_BODY,
 126         &RMF_MDT_EPOCH,
 127         &RMF_REC_REINT,
 128         &RMF_CAPA1
 129 };
 130
 131 static const struct req_msg_field *mdt_close_intent_client[] = {
 132         &RMF_PTLRPC_BODY,
 133         &RMF_MDT_EPOCH,
 134         &RMF_REC_REINT,
 135         &RMF_CAPA1,
 136         &RMF_CLOSE_DATA,
 137         &RMF_U32
 138 };
 139
 140 static const struct req_msg_field *obd_statfs_server[] = {
 141         &RMF_PTLRPC_BODY,
 142         &RMF_OBD_STATFS
 143 };
 144
 145 static const struct req_msg_field *seq_query_client[] = {
 146         &RMF_PTLRPC_BODY,
 147         &RMF_SEQ_OPC,
 148         &RMF_SEQ_RANGE
 149 };
 150
 151 static const struct req_msg_field *seq_query_server[] = {
 152         &RMF_PTLRPC_BODY,
 153         &RMF_SEQ_RANGE
 154 };
 155
 156 static const struct req_msg_field *fld_query_client[] = {
 157         &RMF_PTLRPC_BODY,
 158         &RMF_FLD_OPC,
 159         &RMF_FLD_MDFLD
 160 };
 161
 162 static const struct req_msg_field *fld_query_server[] = {
 163         &RMF_PTLRPC_BODY,
 164         &RMF_FLD_MDFLD
 165 };
 166
 167 static const struct req_msg_field *fld_read_client[] = {
 168         &RMF_PTLRPC_BODY,
 169         &RMF_FLD_MDFLD
 170 };
 171
 172 static const struct req_msg_field *fld_read_server[] = {
 173         &RMF_PTLRPC_BODY,
 174         &RMF_GENERIC_DATA
 175 };
 176
 177 static const struct req_msg_field *mds_getattr_name_client[] = {
 178         &RMF_PTLRPC_BODY,
 179         &RMF_MDT_BODY,
 180         &RMF_CAPA1,
 181         &RMF_NAME
 182 };
 183
 184 static const struct req_msg_field *mds_reint_client[] = {
 185         &RMF_PTLRPC_BODY,
 186         &RMF_REC_REINT
 187 };
 188
 189 static const struct req_msg_field *mds_reint_create_client[] = {
 190         &RMF_PTLRPC_BODY,
 191         &RMF_REC_REINT,
 192         &RMF_CAPA1,
 193         &RMF_NAME
 194 };
 195
 196 static const struct req_msg_field *mds_reint_create_slave_client[] = {
 197         &RMF_PTLRPC_BODY,
 198         &RMF_REC_REINT,
 199         &RMF_CAPA1,
 200         &RMF_NAME,
 201         &RMF_EADATA,
 202         &RMF_DLM_REQ
 203 };
 204
 205 static const struct req_msg_field *mds_reint_create_acl_client[] = {
 206         &RMF_PTLRPC_BODY,
 207         &RMF_REC_REINT,
 208         &RMF_CAPA1,
 209         &RMF_NAME,
 210         &RMF_EADATA,
 211         &RMF_DLM_REQ,
 212         &RMF_FILE_SECCTX_NAME,
 213         &RMF_FILE_SECCTX,
 214         &RMF_SELINUX_POL,
 215         &RMF_FILE_ENCCTX,
 216 };
 217
 218 static const struct req_msg_field *mds_reint_create_sym_client[] = {
 219         &RMF_PTLRPC_BODY,
 220         &RMF_REC_REINT,
 221         &RMF_CAPA1,
 222         &RMF_NAME,
 223         &RMF_SYMTGT,
 224         &RMF_DLM_REQ,
 225         &RMF_FILE_SECCTX_NAME,
 226         &RMF_FILE_SECCTX,
 227         &RMF_SELINUX_POL,
 228         &RMF_FILE_ENCCTX,
 229 };
 230
 231 static const struct req_msg_field *mds_reint_open_client[] = {
 232         &RMF_PTLRPC_BODY,
 233         &RMF_REC_REINT,
 234         &RMF_CAPA1,
 235         &RMF_CAPA2,
 236         &RMF_NAME,
 237         &RMF_EADATA,
 238         &RMF_FILE_SECCTX_NAME,
 239         &RMF_FILE_SECCTX,
 240         &RMF_SELINUX_POL,
 241         &RMF_FILE_ENCCTX,
 242 };
 243
 244 static const struct req_msg_field *mds_reint_open_server[] = {
 245         &RMF_PTLRPC_BODY,
 246         &RMF_MDT_BODY,
 247         &RMF_MDT_MD,
 248         &RMF_ACL,
 249         &RMF_CAPA1,
 250         &RMF_CAPA2
 251 };
 252
 253 static const struct req_msg_field *mds_reint_unlink_client[] = {
 254         &RMF_PTLRPC_BODY,
 255         &RMF_REC_REINT,
 256         &RMF_CAPA1,
 257         &RMF_NAME,
 258         &RMF_DLM_REQ,
 259         &RMF_SELINUX_POL
 260 };
 261
 262 static const struct req_msg_field *mds_reint_link_client[] = {
 263         &RMF_PTLRPC_BODY,
 264         &RMF_REC_REINT,
 265         &RMF_CAPA1,
 266         &RMF_CAPA2,
 267         &RMF_NAME,
 268         &RMF_DLM_REQ,
 269         &RMF_SELINUX_POL
 270 };
 271
 272 static const struct req_msg_field *mds_reint_rename_client[] = {
 273         &RMF_PTLRPC_BODY,
 274         &RMF_REC_REINT,
 275         &RMF_CAPA1,
 276         &RMF_CAPA2,
 277         &RMF_NAME,
 278         &RMF_SYMTGT,
 279         &RMF_DLM_REQ,
 280         &RMF_SELINUX_POL
 281 };
 282
 283 static const struct req_msg_field *mds_reint_migrate_client[] = {
 284         &RMF_PTLRPC_BODY,
 285         &RMF_REC_REINT,
 286         &RMF_CAPA1,
 287         &RMF_CAPA2,
 288         &RMF_NAME,
 289         &RMF_SYMTGT,
 290         &RMF_DLM_REQ,
 291         &RMF_SELINUX_POL,
 292         &RMF_MDT_EPOCH,
 293         &RMF_CLOSE_DATA,
 294         &RMF_EADATA
 295 };
 296
 297 static const struct req_msg_field *mds_last_unlink_server[] = {
 298         &RMF_PTLRPC_BODY,
 299         &RMF_MDT_BODY,
 300         &RMF_MDT_MD,
 301         &RMF_LOGCOOKIES,
 302         &RMF_CAPA1,
 303         &RMF_CAPA2
 304 };
 305
 306 static const struct req_msg_field *mds_reint_setattr_client[] = {
 307         &RMF_PTLRPC_BODY,
 308         &RMF_REC_REINT,
 309         &RMF_CAPA1,
 310         &RMF_MDT_EPOCH,
 311         &RMF_EADATA,
 312         &RMF_LOGCOOKIES,
 313         &RMF_DLM_REQ
 314 };
 315
 316 static const struct req_msg_field *mds_reint_setxattr_client[] = {
 317         &RMF_PTLRPC_BODY,
 318         &RMF_REC_REINT,
 319         &RMF_CAPA1,
 320         &RMF_NAME,
 321         &RMF_EADATA,
 322         &RMF_DLM_REQ,
 323         &RMF_SELINUX_POL
 324 };
 325
 326 static const struct req_msg_field *mds_reint_resync[] = {
 327         &RMF_PTLRPC_BODY,
 328         &RMF_REC_REINT,
 329         &RMF_DLM_REQ
 330 };
 331
 332 static const struct req_msg_field *mdt_swap_layouts[] = {
 333         &RMF_PTLRPC_BODY,
 334         &RMF_MDT_BODY,
 335         &RMF_SWAP_LAYOUTS,
 336         &RMF_CAPA1,
 337         &RMF_CAPA2,
 338         &RMF_DLM_REQ
 339 };
 340
 341 static const struct req_msg_field *mds_rmfid_client[] = {
 342         &RMF_PTLRPC_BODY,
 343         &RMF_MDT_BODY,
 344         &RMF_FID_ARRAY,
 345         &RMF_CAPA1,
 346         &RMF_CAPA2,
 347 };
 348
 349 static const struct req_msg_field *mds_rmfid_server[] = {
 350         &RMF_PTLRPC_BODY,
 351         &RMF_MDT_BODY,
 352         &RMF_FID_ARRAY,
 353         &RMF_RCS,
 354 };
 355
 356 static const struct req_msg_field *obd_connect_client[] = {
 357         &RMF_PTLRPC_BODY,
 358         &RMF_TGTUUID,
 359         &RMF_CLUUID,
 360         &RMF_CONN,
 361         &RMF_CONNECT_DATA,
 362         &RMF_SELINUX_POL
 363 };
 364
 365 static const struct req_msg_field *obd_connect_server[] = {
 366         &RMF_PTLRPC_BODY,
 367         &RMF_CONNECT_DATA
 368 };
 369
 370 static const struct req_msg_field *obd_set_info_client[] = {
 371         &RMF_PTLRPC_BODY,
 372         &RMF_SETINFO_KEY,
 373         &RMF_SETINFO_VAL
 374 };
 375
 376 static const struct req_msg_field *mdt_set_info_client[] = {
 377         &RMF_PTLRPC_BODY,
 378         &RMF_SETINFO_KEY,
 379         &RMF_SETINFO_VAL,
 380         &RMF_MDT_BODY
 381 };
 382
 383 static const struct req_msg_field *ost_grant_shrink_client[] = {
 384         &RMF_PTLRPC_BODY,
 385         &RMF_SETINFO_KEY,
 386         &RMF_OST_BODY
 387 };
 388
 389 static const struct req_msg_field *mds_getinfo_client[] = {
 390         &RMF_PTLRPC_BODY,
 391         &RMF_GETINFO_KEY,
 392         &RMF_GETINFO_VALLEN
 393 };
 394
 395 static const struct req_msg_field *mds_getinfo_server[] = {
 396         &RMF_PTLRPC_BODY,
 397         &RMF_GETINFO_VAL,
 398 };
 399
 400 static const struct req_msg_field *ldlm_enqueue_client[] = {
 401         &RMF_PTLRPC_BODY,
 402         &RMF_DLM_REQ
 403 };
 404
 405 static const struct req_msg_field *ldlm_enqueue_server[] = {
 406         &RMF_PTLRPC_BODY,
 407         &RMF_DLM_REP
 408 };
 409
 410 static const struct req_msg_field *ldlm_enqueue_lvb_server[] = {
 411         &RMF_PTLRPC_BODY,
 412         &RMF_DLM_REP,
 413         &RMF_DLM_LVB
 414 };
 415
 416 static const struct req_msg_field *ldlm_cp_callback_client[] = {
 417         &RMF_PTLRPC_BODY,
 418         &RMF_DLM_REQ,
 419         &RMF_DLM_LVB
 420 };
 421
 422 static const struct req_msg_field *ldlm_gl_callback_desc_client[] = {
 423         &RMF_PTLRPC_BODY,
 424         &RMF_DLM_REQ,
 425         &RMF_DLM_GL_DESC
 426 };
 427
 428 static const struct req_msg_field *ldlm_gl_callback_server[] = {
 429         &RMF_PTLRPC_BODY,
 430         &RMF_DLM_LVB
 431 };
 432
 433 static const struct req_msg_field *ldlm_intent_basic_client[] = {
 434         &RMF_PTLRPC_BODY,
 435         &RMF_DLM_REQ,
 436         &RMF_LDLM_INTENT,
 437 };
 438
 439 static const struct req_msg_field *ldlm_intent_client[] = {
 440         &RMF_PTLRPC_BODY,
 441         &RMF_DLM_REQ,
 442         &RMF_LDLM_INTENT,
 443         &RMF_REC_REINT
 444 };
 445
 446 static const struct req_msg_field *ldlm_intent_server[] = {
 447         &RMF_PTLRPC_BODY,
 448         &RMF_DLM_REP,
 449         &RMF_MDT_BODY,
 450         &RMF_MDT_MD,
 451         &RMF_ACL
 452 };
 453
 454 static const struct req_msg_field *ldlm_intent_layout_client[] = {
 455         &RMF_PTLRPC_BODY,
 456         &RMF_DLM_REQ,
 457         &RMF_LDLM_INTENT,
 458         &RMF_LAYOUT_INTENT,
 459         &RMF_EADATA /* for new layout to be set up */
 460 };
 461
 462 static const struct req_msg_field *ldlm_intent_open_server[] = {
 463         &RMF_PTLRPC_BODY,
 464         &RMF_DLM_REP,
 465         &RMF_MDT_BODY,
 466         &RMF_MDT_MD,
 467         &RMF_ACL,
 468         &RMF_CAPA1,
 469         &RMF_CAPA2,
 470         &RMF_NIOBUF_INLINE,
 471         &RMF_FILE_SECCTX,
 472         &RMF_FILE_ENCCTX,
 473         &RMF_DEFAULT_MDT_MD,
 474 };
 475
 476 static const struct req_msg_field *ldlm_intent_getattr_client[] = {
 477         &RMF_PTLRPC_BODY,
 478         &RMF_DLM_REQ,
 479         &RMF_LDLM_INTENT,
 480         &RMF_MDT_BODY,     /* coincides with mds_getattr_name_client[] */
 481         &RMF_CAPA1,
 482         &RMF_NAME,
 483         &RMF_FILE_SECCTX_NAME
 484 };
 485
 486 static const struct req_msg_field *ldlm_intent_getattr_server[] = {
 487         &RMF_PTLRPC_BODY,
 488         &RMF_DLM_REP,
 489         &RMF_MDT_BODY,
 490         &RMF_MDT_MD,
 491         &RMF_ACL,
 492         &RMF_CAPA1,
 493         &RMF_FILE_SECCTX,
 494         &RMF_DEFAULT_MDT_MD,
 495         &RMF_FILE_ENCCTX,
 496 };
 497
 498 static const struct req_msg_field *ldlm_intent_create_client[] = {
 499         &RMF_PTLRPC_BODY,
 500         &RMF_DLM_REQ,
 501         &RMF_LDLM_INTENT,
 502         &RMF_REC_REINT,    /* coincides with mds_reint_create_client[] */
 503         &RMF_CAPA1,
 504         &RMF_NAME,
 505         &RMF_EADATA,
 506         &RMF_FILE_SECCTX_NAME,
 507         &RMF_FILE_SECCTX,
 508         &RMF_SELINUX_POL,
 509         &RMF_FILE_ENCCTX,
 510 };
 511
 512 static const struct req_msg_field *ldlm_intent_open_client[] = {
 513         &RMF_PTLRPC_BODY,
 514         &RMF_DLM_REQ,
 515         &RMF_LDLM_INTENT,
 516         &RMF_REC_REINT,    /* coincides with mds_reint_open_client[] */
 517         &RMF_CAPA1,
 518         &RMF_CAPA2,
 519         &RMF_NAME,
 520         &RMF_EADATA,
 521         &RMF_FILE_SECCTX_NAME,
 522         &RMF_FILE_SECCTX,
 523         &RMF_SELINUX_POL,
 524         &RMF_FILE_ENCCTX,
 525 };
 526
 527 static const struct req_msg_field *ldlm_intent_getxattr_client[] = {
 528         &RMF_PTLRPC_BODY,
 529         &RMF_DLM_REQ,
 530         &RMF_LDLM_INTENT,
 531         &RMF_MDT_BODY,
 532         &RMF_CAPA1,
 533         &RMF_SELINUX_POL
 534 };
 535
 536 static const struct req_msg_field *ldlm_intent_getxattr_server[] = {
 537         &RMF_PTLRPC_BODY,
 538         &RMF_DLM_REP,
 539         &RMF_MDT_BODY,
 540         &RMF_MDT_MD,
 541         &RMF_ACL, /* for req_capsule_extend/mdt_intent_policy */
 542         &RMF_EADATA,
 543         &RMF_EAVALS,
 544         &RMF_EAVALS_LENS
 545 };
 546
 547 static const struct req_msg_field *mds_get_root_client[] = {
 548         &RMF_PTLRPC_BODY,
 549         &RMF_MDT_BODY,
 550         &RMF_NAME
 551 };
 552
 553 static const struct req_msg_field *mds_getxattr_client[] = {
 554         &RMF_PTLRPC_BODY,
 555         &RMF_MDT_BODY,
 556         &RMF_CAPA1,
 557         &RMF_NAME,
 558         &RMF_EADATA,
 559         &RMF_SELINUX_POL
 560 };
 561
 562 static const struct req_msg_field *mds_getxattr_server[] = {
 563         &RMF_PTLRPC_BODY,
 564         &RMF_MDT_BODY,
 565         &RMF_EADATA
 566 };
 567
 568 static const struct req_msg_field *mds_getattr_server[] = {
 569         &RMF_PTLRPC_BODY,
 570         &RMF_MDT_BODY,
 571         &RMF_MDT_MD,
 572         &RMF_ACL,
 573         &RMF_CAPA1,
 574         &RMF_CAPA2,
 575         &RMF_FILE_ENCCTX,
 576 };
 577
 578 static const struct req_msg_field *mds_setattr_server[] = {
 579         &RMF_PTLRPC_BODY,
 580         &RMF_MDT_BODY,
 581         &RMF_MDT_MD,
 582         &RMF_ACL,
 583         &RMF_CAPA1,
 584         &RMF_CAPA2
 585 };
 586
 587 static const struct req_msg_field *mds_batch_client[] = {
 588         &RMF_PTLRPC_BODY,
 589         &RMF_BUT_HEADER,
 590         &RMF_BUT_BUF,
 591 };
 592
 593 static const struct req_msg_field *mds_batch_server[] = {
 594         &RMF_PTLRPC_BODY,
 595         &RMF_BUT_REPLY,
 596 };
 597
 598 static const struct req_msg_field *llog_origin_handle_create_client[] = {
 599         &RMF_PTLRPC_BODY,
 600         &RMF_LLOGD_BODY,
 601         &RMF_NAME,
 602         &RMF_MDT_BODY
 603 };
 604
 605 static const struct req_msg_field *llogd_body_only[] = {
 606         &RMF_PTLRPC_BODY,
 607         &RMF_LLOGD_BODY
 608 };
 609
 610 static const struct req_msg_field *llog_log_hdr_only[] = {
 611         &RMF_PTLRPC_BODY,
 612         &RMF_LLOG_LOG_HDR
 613 };
 614
 615 static const struct req_msg_field *llog_origin_handle_next_block_server[] = {
 616         &RMF_PTLRPC_BODY,
 617         &RMF_LLOGD_BODY,
 618         &RMF_EADATA
 619 };
 620
 621 static const struct req_msg_field *obd_idx_read_client[] = {
 622         &RMF_PTLRPC_BODY,
 623         &RMF_IDX_INFO
 624 };
 625
 626 static const struct req_msg_field *obd_idx_read_server[] = {
 627         &RMF_PTLRPC_BODY,
 628         &RMF_IDX_INFO
 629 };
 630
 631 static const struct req_msg_field *ost_body_only[] = {
 632         &RMF_PTLRPC_BODY,
 633         &RMF_OST_BODY
 634 };
 635
 636 static const struct req_msg_field *ost_body_capa[] = {
 637         &RMF_PTLRPC_BODY,
 638         &RMF_OST_BODY,
 639         &RMF_CAPA1
 640 };
 641
 642 static const struct req_msg_field *ost_destroy_client[] = {
 643         &RMF_PTLRPC_BODY,
 644         &RMF_OST_BODY,
 645         &RMF_DLM_REQ,
 646         &RMF_CAPA1
 647 };
 648
 649
 650 static const struct req_msg_field *ost_brw_client[] = {
 651         &RMF_PTLRPC_BODY,
 652         &RMF_OST_BODY,
 653         &RMF_OBD_IOOBJ,
 654         &RMF_NIOBUF_REMOTE,
 655         &RMF_CAPA1,
 656         &RMF_SHORT_IO
 657 };
 658
 659 static const struct req_msg_field *ost_brw_read_server[] = {
 660         &RMF_PTLRPC_BODY,
 661         &RMF_OST_BODY,
 662         &RMF_SHORT_IO
 663 };
 664
 665 static const struct req_msg_field *ost_brw_write_server[] = {
 666         &RMF_PTLRPC_BODY,
 667         &RMF_OST_BODY,
 668         &RMF_RCS
 669 };
 670
 671 static const struct req_msg_field *ost_get_info_generic_server[] = {
 672         &RMF_PTLRPC_BODY,
 673         &RMF_GENERIC_DATA,
 674 };
 675
 676 static const struct req_msg_field *ost_get_info_generic_client[] = {
 677         &RMF_PTLRPC_BODY,
 678         &RMF_GETINFO_KEY
 679 };
 680
 681 static const struct req_msg_field *ost_get_last_id_server[] = {
 682         &RMF_PTLRPC_BODY,
 683         &RMF_OBD_ID
 684 };
 685
 686 static const struct req_msg_field *ost_get_last_fid_client[] = {
 687         &RMF_PTLRPC_BODY,
 688         &RMF_GETINFO_KEY,
 689         &RMF_FID,
 690 };
 691
 692 static const struct req_msg_field *ost_get_last_fid_server[] = {
 693         &RMF_PTLRPC_BODY,
 694         &RMF_FID,
 695 };
 696
 697 static const struct req_msg_field *ost_get_fiemap_client[] = {
 698         &RMF_PTLRPC_BODY,
 699         &RMF_FIEMAP_KEY,
 700         &RMF_FIEMAP_VAL
 701 };
 702
 703 static const struct req_msg_field *ost_ladvise[] = {
 704         &RMF_PTLRPC_BODY,
 705         &RMF_OST_BODY,
 706         &RMF_OST_LADVISE_HDR,
 707         &RMF_OST_LADVISE,
 708 };
 709
 710 static const struct req_msg_field *ost_get_fiemap_server[] = {
 711         &RMF_PTLRPC_BODY,
 712         &RMF_FIEMAP_VAL
 713 };
 714
 715 static const struct req_msg_field *mdt_hsm_progress[] = {
 716         &RMF_PTLRPC_BODY,
 717         &RMF_MDT_BODY,
 718         &RMF_MDS_HSM_PROGRESS,
 719 };
 720
 721 static const struct req_msg_field *mdt_hsm_ct_register[] = {
 722         &RMF_PTLRPC_BODY,
 723         &RMF_MDT_BODY,
 724         &RMF_MDS_HSM_ARCHIVE,
 725 };
 726
 727 static const struct req_msg_field *mdt_hsm_ct_unregister[] = {
 728         &RMF_PTLRPC_BODY,
 729         &RMF_MDT_BODY,
 730 };
 731
 732 static const struct req_msg_field *mdt_hsm_action_server[] = {
 733         &RMF_PTLRPC_BODY,
 734         &RMF_MDT_BODY,
 735         &RMF_MDS_HSM_CURRENT_ACTION,
 736 };
 737
 738 static const struct req_msg_field *mdt_hsm_state_get_server[] = {
 739         &RMF_PTLRPC_BODY,
 740         &RMF_MDT_BODY,
 741         &RMF_HSM_USER_STATE,
 742 };
 743
 744 static const struct req_msg_field *mdt_hsm_state_set[] = {
 745         &RMF_PTLRPC_BODY,
 746         &RMF_MDT_BODY,
 747         &RMF_CAPA1,
 748         &RMF_HSM_STATE_SET,
 749 };
 750
 751 static const struct req_msg_field *mdt_hsm_request[] = {
 752         &RMF_PTLRPC_BODY,
 753         &RMF_MDT_BODY,
 754         &RMF_MDS_HSM_REQUEST,
 755         &RMF_MDS_HSM_USER_ITEM,
 756         &RMF_GENERIC_DATA,
 757 };
 758
 759 static const struct req_msg_field *obd_lfsck_request[] = {
 760         &RMF_PTLRPC_BODY,
 761         &RMF_LFSCK_REQUEST,
 762 };
 763
 764 static const struct req_msg_field *obd_lfsck_reply[] = {
 765         &RMF_PTLRPC_BODY,
 766         &RMF_LFSCK_REPLY,
 767 };
 768
 769 static struct req_format *req_formats[] = {
 770         &RQF_OBD_PING,
 771         &RQF_OBD_SET_INFO,
 772         &RQF_MDT_SET_INFO,
 773         &RQF_OBD_IDX_READ,
 774         &RQF_SEC_CTX,
 775         &RQF_MGS_TARGET_REG,
 776 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 18, 53, 0)
 777         &RQF_MGS_SET_INFO,
 778 #endif
 779         &RQF_MGS_CONFIG_READ,
 780         &RQF_SEQ_QUERY,
 781         &RQF_FLD_QUERY,
 782         &RQF_FLD_READ,
 783         &RQF_MDS_CONNECT,
 784         &RQF_MDS_DISCONNECT,
 785         &RQF_MDS_GET_INFO,
 786         &RQF_MDS_GET_ROOT,
 787         &RQF_MDS_STATFS,
 788         &RQF_MDS_STATFS_NEW,
 789         &RQF_MDS_GETATTR,
 790         &RQF_MDS_GETATTR_NAME,
 791         &RQF_MDS_GETXATTR,
 792         &RQF_MDS_SYNC,
 793         &RQF_MDS_CLOSE,
 794         &RQF_MDS_CLOSE_INTENT,
 795         &RQF_MDS_READPAGE,
 796         &RQF_MDS_REINT,
 797         &RQF_MDS_REINT_CREATE,
 798         &RQF_MDS_REINT_CREATE_ACL,
 799         &RQF_MDS_REINT_CREATE_SLAVE,
 800         &RQF_MDS_REINT_CREATE_SYM,
 801         &RQF_MDS_REINT_OPEN,
 802         &RQF_MDS_REINT_UNLINK,
 803         &RQF_MDS_REINT_LINK,
 804         &RQF_MDS_REINT_RENAME,
 805         &RQF_MDS_REINT_MIGRATE,
 806         &RQF_MDS_REINT_SETATTR,
 807         &RQF_MDS_REINT_SETXATTR,
 808         &RQF_MDS_REINT_RESYNC,
 809         &RQF_MDS_QUOTACTL,
 810         &RQF_MDS_HSM_PROGRESS,
 811         &RQF_MDS_HSM_CT_REGISTER,
 812         &RQF_MDS_HSM_CT_UNREGISTER,
 813         &RQF_MDS_HSM_STATE_GET,
 814         &RQF_MDS_HSM_STATE_SET,
 815         &RQF_MDS_HSM_ACTION,
 816         &RQF_MDS_HSM_REQUEST,
 817         &RQF_MDS_SWAP_LAYOUTS,
 818         &RQF_MDS_RMFID,
 819 #ifdef HAVE_SERVER_SUPPORT
 820         &RQF_OUT_UPDATE,
 821 #endif
 822         &RQF_OST_CONNECT,
 823         &RQF_OST_DISCONNECT,
 824         &RQF_OST_QUOTACTL,
 825         &RQF_OST_GETATTR,
 826         &RQF_OST_SETATTR,
 827         &RQF_OST_CREATE,
 828         &RQF_OST_PUNCH,
 829         &RQF_OST_FALLOCATE,
 830         &RQF_OST_SYNC,
 831         &RQF_OST_DESTROY,
 832         &RQF_OST_BRW_READ,
 833         &RQF_OST_BRW_WRITE,
 834         &RQF_OST_STATFS,
 835         &RQF_OST_SET_GRANT_INFO,
 836         &RQF_OST_GET_INFO,
 837         &RQF_OST_GET_INFO_LAST_ID,
 838         &RQF_OST_GET_INFO_LAST_FID,
 839         &RQF_OST_SET_INFO_LAST_FID,
 840         &RQF_OST_GET_INFO_FIEMAP,
 841         &RQF_OST_LADVISE,
 842         &RQF_OST_SEEK,
 843         &RQF_LDLM_ENQUEUE,
 844         &RQF_LDLM_ENQUEUE_LVB,
 845         &RQF_LDLM_CONVERT,
 846         &RQF_LDLM_CANCEL,
 847         &RQF_LDLM_CALLBACK,
 848         &RQF_LDLM_CP_CALLBACK,
 849         &RQF_LDLM_BL_CALLBACK,
 850         &RQF_LDLM_GL_CALLBACK,
 851         &RQF_LDLM_GL_CALLBACK_DESC,
 852         &RQF_LDLM_INTENT,
 853         &RQF_LDLM_INTENT_BASIC,
 854         &RQF_LDLM_INTENT_LAYOUT,
 855         &RQF_LDLM_INTENT_GETATTR,
 856         &RQF_LDLM_INTENT_OPEN,
 857         &RQF_LDLM_INTENT_CREATE,
 858         &RQF_LDLM_INTENT_GETXATTR,
 859         &RQF_LDLM_INTENT_QUOTA,
 860         &RQF_QUOTA_DQACQ,
 861         &RQF_LLOG_ORIGIN_HANDLE_CREATE,
 862         &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK,
 863         &RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK,
 864         &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER,
 865         &RQF_CONNECT,
 866         &RQF_LFSCK_NOTIFY,
 867         &RQF_LFSCK_QUERY,
 868         &RQF_MDS_BATCH,
 869 };
 870
 871 struct req_msg_field {
 872         const __u32 rmf_flags;
 873         const char  *rmf_name;
 874         /**
 875          * Field length. (-1) means "variable length".  If the
 876          * \a RMF_F_STRUCT_ARRAY flag is set the field is also variable-length,
 877          * but the actual size must be a whole multiple of \a rmf_size.
 878          */
 879         const int   rmf_size;
 880         void        (*rmf_swabber)(void *);
 881         /**
 882          * Pass buffer size to swabbing function
 883          * \retval      > 0             the number of bytes swabbed
 884          *              -EOVERFLOW      on error
 885          */
 886         int         (*rmf_swab_len)(void *, __u32);
 887         void        (*rmf_dumper)(void *);
 888         int         rmf_offset[ARRAY_SIZE(req_formats)][RCL_NR];
 889 };
 890
 891 enum rmf_flags {
 892         /**
 893          * The field is a string, must be NUL-terminated.
 894          */
 895         RMF_F_STRING            = BIT(0),
 896         /**
 897          * The field's buffer size need not match the declared \a rmf_size.
 898          */
 899         RMF_F_NO_SIZE_CHECK     = BIT(1),
 900         /**
 901          * The field's buffer size must be a whole multiple of the declared \a
 902          * rmf_size and the \a rmf_swabber function must work on the declared \a
 903          * rmf_size worth of bytes.
 904          */
 905         RMF_F_STRUCT_ARRAY      = BIT(2),
 906 };
 907
 908 struct req_capsule;
 909
 910 /*
 911  * Request fields.
 912  */
 913 #define DEFINE_MSGF(name, flags, size, swabber, dumper) {       \
 914         .rmf_name    = (name),                                  \
 915         .rmf_flags   = (flags),                                 \
 916         .rmf_size    = (size),                                  \
 917         .rmf_swabber = (void (*)(void*))(swabber),              \
 918         .rmf_dumper  = (void (*)(void*))(dumper)                \
 919 }
 920
 921 #define DEFINE_MSGFL(name, flags, size, swab_len, dumper) {     \
 922         .rmf_name     = (name),                                 \
 923         .rmf_flags    = (flags),                                \
 924         .rmf_size     = (size),                                 \
 925         .rmf_swab_len = (int (*)(void *, __u32))(swab_len),     \
 926         .rmf_dumper   = (void (*)(void *))(dumper)              \
 927 }
 928
 929 struct req_msg_field RMF_GENERIC_DATA =
 930         DEFINE_MSGF("generic_data", 0,
 931                     -1, NULL, NULL);
 932 EXPORT_SYMBOL(RMF_GENERIC_DATA);
 933
 934 struct req_msg_field RMF_MGS_TARGET_INFO =
 935         DEFINE_MSGF("mgs_target_info", 0,
 936                     sizeof(struct mgs_target_info),
 937                     lustre_swab_mgs_target_info, NULL);
 938 EXPORT_SYMBOL(RMF_MGS_TARGET_INFO);
 939
 940 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 18, 53, 0)
 941 struct req_msg_field RMF_MGS_SEND_PARAM =
 942         DEFINE_MSGF("mgs_send_param", 0,
 943                     sizeof(struct mgs_send_param),
 944                     NULL, NULL);
 945 EXPORT_SYMBOL(RMF_MGS_SEND_PARAM);
 946 #endif
 947
 948 struct req_msg_field RMF_MGS_CONFIG_BODY =
 949         DEFINE_MSGF("mgs_config_read request", 0,
 950                     sizeof(struct mgs_config_body),
 951                     lustre_swab_mgs_config_body, NULL);
 952 EXPORT_SYMBOL(RMF_MGS_CONFIG_BODY);
 953
 954 struct req_msg_field RMF_MGS_CONFIG_RES =
 955         DEFINE_MSGF("mgs_config_read reply ", 0,
 956                     sizeof(struct mgs_config_res),
 957                     lustre_swab_mgs_config_res, NULL);
 958 EXPORT_SYMBOL(RMF_MGS_CONFIG_RES);
 959
 960 struct req_msg_field RMF_U32 =
 961         DEFINE_MSGF("generic u32", RMF_F_STRUCT_ARRAY,
 962                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 963 EXPORT_SYMBOL(RMF_U32);
 964
 965 struct req_msg_field RMF_SETINFO_VAL =
 966         DEFINE_MSGF("setinfo_val", 0, -1, NULL, NULL);
 967 EXPORT_SYMBOL(RMF_SETINFO_VAL);
 968
 969 struct req_msg_field RMF_GETINFO_KEY =
 970         DEFINE_MSGF("getinfo_key", 0, -1, NULL, NULL);
 971 EXPORT_SYMBOL(RMF_GETINFO_KEY);
 972
 973 struct req_msg_field RMF_GETINFO_VALLEN =
 974         DEFINE_MSGF("getinfo_vallen", 0,
 975                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 976 EXPORT_SYMBOL(RMF_GETINFO_VALLEN);
 977
 978 struct req_msg_field RMF_GETINFO_VAL =
 979         DEFINE_MSGF("getinfo_val", 0, -1, NULL, NULL);
 980 EXPORT_SYMBOL(RMF_GETINFO_VAL);
 981
 982 struct req_msg_field RMF_SEQ_OPC =
 983         DEFINE_MSGF("seq_query_opc", 0,
 984                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 985 EXPORT_SYMBOL(RMF_SEQ_OPC);
 986
 987 struct req_msg_field RMF_SEQ_RANGE =
 988         DEFINE_MSGF("seq_query_range", 0,
 989                     sizeof(struct lu_seq_range),
 990                     lustre_swab_lu_seq_range, NULL);
 991 EXPORT_SYMBOL(RMF_SEQ_RANGE);
 992
 993 struct req_msg_field RMF_FLD_OPC =
 994         DEFINE_MSGF("fld_query_opc", 0,
 995                     sizeof(__u32), lustre_swab_generic_32s, NULL);
 996 EXPORT_SYMBOL(RMF_FLD_OPC);
 997
 998 struct req_msg_field RMF_FLD_MDFLD =
 999         DEFINE_MSGF("fld_query_mdfld", 0,
1000                     sizeof(struct lu_seq_range),
1001                     lustre_swab_lu_seq_range, NULL);
1002 EXPORT_SYMBOL(RMF_FLD_MDFLD);
1003
1004 struct req_msg_field RMF_MDT_BODY =
1005         DEFINE_MSGF("mdt_body", 0,
1006                     sizeof(struct mdt_body), lustre_swab_mdt_body, NULL);
1007 EXPORT_SYMBOL(RMF_MDT_BODY);
1008
1009 struct req_msg_field RMF_OBD_QUOTACTL =
1010         DEFINE_MSGFL("obd_quotactl",
1011                      0,
1012                      sizeof(struct obd_quotactl),
1013                      lustre_swab_obd_quotactl, NULL);
1014 EXPORT_SYMBOL(RMF_OBD_QUOTACTL);
1015
1016 struct req_msg_field RMF_QUOTA_BODY =
1017         DEFINE_MSGF("quota_body", 0,
1018                     sizeof(struct quota_body), lustre_swab_quota_body, NULL);
1019 EXPORT_SYMBOL(RMF_QUOTA_BODY);
1020
1021 struct req_msg_field RMF_MDT_EPOCH =
1022         DEFINE_MSGF("mdt_ioepoch", 0,
1023                     sizeof(struct mdt_ioepoch), lustre_swab_mdt_ioepoch, NULL);
1024 EXPORT_SYMBOL(RMF_MDT_EPOCH);
1025
1026 struct req_msg_field RMF_PTLRPC_BODY =
1027         DEFINE_MSGF("ptlrpc_body", 0,
1028                     sizeof(struct ptlrpc_body), lustre_swab_ptlrpc_body, NULL);
1029 EXPORT_SYMBOL(RMF_PTLRPC_BODY);
1030
1031 struct req_msg_field RMF_CLOSE_DATA =
1032         DEFINE_MSGF("data_version", 0,
1033                     sizeof(struct close_data), lustre_swab_close_data, NULL);
1034 EXPORT_SYMBOL(RMF_CLOSE_DATA);
1035
1036 struct req_msg_field RMF_OBD_STATFS =
1037         DEFINE_MSGF("obd_statfs", 0,
1038                     sizeof(struct obd_statfs), lustre_swab_obd_statfs, NULL);
1039 EXPORT_SYMBOL(RMF_OBD_STATFS);
1040
1041 struct req_msg_field RMF_SETINFO_KEY =
1042         DEFINE_MSGF("setinfo_key", 0, -1, NULL, NULL);
1043 EXPORT_SYMBOL(RMF_SETINFO_KEY);
1044
1045 struct req_msg_field RMF_NAME =
1046         DEFINE_MSGF("name", RMF_F_STRING, -1, NULL, NULL);
1047 EXPORT_SYMBOL(RMF_NAME);
1048
1049 struct req_msg_field RMF_FID_ARRAY =
1050         DEFINE_MSGF("fid_array", 0, -1, NULL, NULL);
1051 EXPORT_SYMBOL(RMF_FID_ARRAY);
1052
1053 struct req_msg_field RMF_SYMTGT =
1054         DEFINE_MSGF("symtgt", 0, -1, NULL, NULL);
1055 EXPORT_SYMBOL(RMF_SYMTGT);
1056
1057 struct req_msg_field RMF_TGTUUID =
1058         DEFINE_MSGF("tgtuuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
1059         NULL);
1060 EXPORT_SYMBOL(RMF_TGTUUID);
1061
1062 struct req_msg_field RMF_CLUUID =
1063         DEFINE_MSGF("cluuid", RMF_F_STRING, sizeof(struct obd_uuid) - 1, NULL,
1064         NULL);
1065 EXPORT_SYMBOL(RMF_CLUUID);
1066
1067 struct req_msg_field RMF_STRING =
1068         DEFINE_MSGF("string", RMF_F_STRING, -1, NULL, NULL);
1069 EXPORT_SYMBOL(RMF_STRING);
1070
1071 struct req_msg_field RMF_FILE_SECCTX_NAME =
1072         DEFINE_MSGF("file_secctx_name", RMF_F_STRING, -1, NULL, NULL);
1073 EXPORT_SYMBOL(RMF_FILE_SECCTX_NAME);
1074
1075 struct req_msg_field RMF_FILE_SECCTX =
1076         DEFINE_MSGF("file_secctx", RMF_F_NO_SIZE_CHECK, -1, NULL, NULL);
1077 EXPORT_SYMBOL(RMF_FILE_SECCTX);
1078
1079 struct req_msg_field RMF_FILE_ENCCTX =
1080         DEFINE_MSGF("file_encctx", RMF_F_NO_SIZE_CHECK, -1, NULL, NULL);
1081 EXPORT_SYMBOL(RMF_FILE_ENCCTX);
1082
1083 struct req_msg_field RMF_LLOGD_BODY =
1084         DEFINE_MSGF("llogd_body", 0,
1085                     sizeof(struct llogd_body), lustre_swab_llogd_body, NULL);
1086 EXPORT_SYMBOL(RMF_LLOGD_BODY);
1087
1088 struct req_msg_field RMF_LLOG_LOG_HDR =
1089         DEFINE_MSGF("llog_log_hdr", 0,
1090                     sizeof(struct llog_log_hdr), lustre_swab_llog_hdr, NULL);
1091 EXPORT_SYMBOL(RMF_LLOG_LOG_HDR);
1092
1093 struct req_msg_field RMF_LLOGD_CONN_BODY =
1094         DEFINE_MSGF("llogd_conn_body", 0,
1095                     sizeof(struct llogd_conn_body),
1096                     lustre_swab_llogd_conn_body, NULL);
1097 EXPORT_SYMBOL(RMF_LLOGD_CONN_BODY);
1098
1099 /*
1100  * connection handle received in MDS_CONNECT request.
1101  *
1102  * No swabbing needed because struct lustre_handle contains only a 64-bit cookie
1103  * that the client does not interpret at all.
1104  */
1105 struct req_msg_field RMF_CONN =
1106         DEFINE_MSGF("conn", 0, sizeof(struct lustre_handle), NULL, NULL);
1107 EXPORT_SYMBOL(RMF_CONN);
1108
1109 struct req_msg_field RMF_CONNECT_DATA =
1110         DEFINE_MSGF("cdata",
1111                     RMF_F_NO_SIZE_CHECK /* we allow extra space for interop */,
1112                     sizeof(struct obd_connect_data),
1113                     lustre_swab_connect, NULL);
1114 EXPORT_SYMBOL(RMF_CONNECT_DATA);
1115
1116 struct req_msg_field RMF_DLM_REQ =
1117         DEFINE_MSGF("dlm_req", RMF_F_NO_SIZE_CHECK /* ldlm_request_bufsize */,
1118                     sizeof(struct ldlm_request),
1119                     lustre_swab_ldlm_request, NULL);
1120 EXPORT_SYMBOL(RMF_DLM_REQ);
1121
1122 struct req_msg_field RMF_DLM_REP =
1123         DEFINE_MSGF("dlm_rep", 0,
1124                     sizeof(struct ldlm_reply), lustre_swab_ldlm_reply, NULL);
1125 EXPORT_SYMBOL(RMF_DLM_REP);
1126
1127 struct req_msg_field RMF_LDLM_INTENT =
1128         DEFINE_MSGF("ldlm_intent", 0,
1129                     sizeof(struct ldlm_intent), lustre_swab_ldlm_intent, NULL);
1130 EXPORT_SYMBOL(RMF_LDLM_INTENT);
1131
1132 struct req_msg_field RMF_DLM_LVB =
1133         DEFINE_MSGF("dlm_lvb", 0, -1, NULL, NULL);
1134 EXPORT_SYMBOL(RMF_DLM_LVB);
1135
1136 struct req_msg_field RMF_DLM_GL_DESC =
1137         DEFINE_MSGF("dlm_gl_desc", 0, sizeof(union ldlm_gl_desc), NULL, NULL);
1138 EXPORT_SYMBOL(RMF_DLM_GL_DESC);
1139
1140 struct req_msg_field RMF_MDT_MD =
1141         DEFINE_MSGF("mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL, NULL);
1142 EXPORT_SYMBOL(RMF_MDT_MD);
1143
1144 struct req_msg_field RMF_DEFAULT_MDT_MD =
1145         DEFINE_MSGF("default_mdt_md", RMF_F_NO_SIZE_CHECK, MIN_MD_SIZE, NULL,
1146                     NULL);
1147 EXPORT_SYMBOL(RMF_DEFAULT_MDT_MD);
1148
1149 struct req_msg_field RMF_REC_REINT =
1150         DEFINE_MSGF("rec_reint", 0, sizeof(struct mdt_rec_reint),
1151                     lustre_swab_mdt_rec_reint, NULL);
1152 EXPORT_SYMBOL(RMF_REC_REINT);
1153
1154 /* FIXME: this length should be defined as a macro */
1155 struct req_msg_field RMF_EADATA = DEFINE_MSGF("eadata", 0, -1,
1156                                                     NULL, NULL);
1157 EXPORT_SYMBOL(RMF_EADATA);
1158
1159 struct req_msg_field RMF_EAVALS = DEFINE_MSGF("eavals", 0, -1, NULL, NULL);
1160 EXPORT_SYMBOL(RMF_EAVALS);
1161
1162 struct req_msg_field RMF_ACL = DEFINE_MSGF("acl", 0, -1, NULL, NULL);
1163 EXPORT_SYMBOL(RMF_ACL);
1164
1165 /* FIXME: this should be made to use RMF_F_STRUCT_ARRAY */
1166 struct req_msg_field RMF_LOGCOOKIES =
1167         DEFINE_MSGF("logcookies", RMF_F_NO_SIZE_CHECK /* multiple cookies */,
1168                     sizeof(struct llog_cookie), NULL, NULL);
1169 EXPORT_SYMBOL(RMF_LOGCOOKIES);
1170
1171 struct req_msg_field RMF_CAPA1 =
1172         DEFINE_MSGF("capa", 0, 0, NULL, NULL);
1173 EXPORT_SYMBOL(RMF_CAPA1);
1174
1175 struct req_msg_field RMF_CAPA2 =
1176         DEFINE_MSGF("capa", 0, 0, NULL, NULL);
1177 EXPORT_SYMBOL(RMF_CAPA2);
1178
1179 struct req_msg_field RMF_LAYOUT_INTENT =
1180         DEFINE_MSGF("layout_intent", 0,
1181                     sizeof(struct layout_intent), lustre_swab_layout_intent,
1182                     NULL);
1183 EXPORT_SYMBOL(RMF_LAYOUT_INTENT);
1184
1185 struct req_msg_field RMF_SELINUX_POL =
1186         DEFINE_MSGF("selinux_pol", RMF_F_STRING, -1, NULL, NULL);
1187 EXPORT_SYMBOL(RMF_SELINUX_POL);
1188
1189 /*
1190  * OST request field.
1191  */
1192 struct req_msg_field RMF_OST_BODY =
1193         DEFINE_MSGF("ost_body", 0,
1194                     sizeof(struct ost_body), lustre_swab_ost_body,
1195                     dump_ost_body);
1196 EXPORT_SYMBOL(RMF_OST_BODY);
1197
1198 struct req_msg_field RMF_OBD_IOOBJ =
1199         DEFINE_MSGF("obd_ioobj", RMF_F_STRUCT_ARRAY,
1200                     sizeof(struct obd_ioobj), lustre_swab_obd_ioobj, dump_ioo);
1201 EXPORT_SYMBOL(RMF_OBD_IOOBJ);
1202
1203 struct req_msg_field RMF_NIOBUF_REMOTE =
1204         DEFINE_MSGF("niobuf_remote", RMF_F_STRUCT_ARRAY,
1205                     sizeof(struct niobuf_remote), lustre_swab_niobuf_remote,
1206                     dump_rniobuf);
1207 EXPORT_SYMBOL(RMF_NIOBUF_REMOTE);
1208
1209 struct req_msg_field RMF_NIOBUF_INLINE =
1210         DEFINE_MSGF("niobuf_inline", RMF_F_NO_SIZE_CHECK,
1211                     sizeof(struct niobuf_remote), lustre_swab_niobuf_remote,
1212                     dump_rniobuf);
1213 EXPORT_SYMBOL(RMF_NIOBUF_INLINE);
1214
1215 struct req_msg_field RMF_RCS =
1216         DEFINE_MSGF("niobuf_rcs", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1217                     lustre_swab_generic_32s, dump_rcs);
1218 EXPORT_SYMBOL(RMF_RCS);
1219
1220 struct req_msg_field RMF_EAVALS_LENS =
1221         DEFINE_MSGF("eavals_lens", RMF_F_STRUCT_ARRAY, sizeof(__u32),
1222                 lustre_swab_generic_32s, NULL);
1223 EXPORT_SYMBOL(RMF_EAVALS_LENS);
1224
1225 struct req_msg_field RMF_OBD_ID =
1226         DEFINE_MSGF("obd_id", 0,
1227                     sizeof(__u64), lustre_swab_ost_last_id, NULL);
1228 EXPORT_SYMBOL(RMF_OBD_ID);
1229
1230 struct req_msg_field RMF_FID =
1231         DEFINE_MSGF("fid", 0,
1232                     sizeof(struct lu_fid), lustre_swab_lu_fid, NULL);
1233 EXPORT_SYMBOL(RMF_FID);
1234
1235 struct req_msg_field RMF_OST_ID =
1236         DEFINE_MSGF("ost_id", 0,
1237                     sizeof(struct ost_id), lustre_swab_ost_id, NULL);
1238 EXPORT_SYMBOL(RMF_OST_ID);
1239
1240 struct req_msg_field RMF_FIEMAP_KEY =
1241         DEFINE_MSGF("fiemap_key", 0, sizeof(struct ll_fiemap_info_key),
1242                     lustre_swab_fiemap_info_key, NULL);
1243 EXPORT_SYMBOL(RMF_FIEMAP_KEY);
1244
1245 struct req_msg_field RMF_FIEMAP_VAL =
1246         DEFINE_MSGFL("fiemap", 0, -1, lustre_swab_fiemap, NULL);
1247 EXPORT_SYMBOL(RMF_FIEMAP_VAL);
1248
1249 struct req_msg_field RMF_IDX_INFO =
1250         DEFINE_MSGF("idx_info", 0, sizeof(struct idx_info),
1251                     lustre_swab_idx_info, NULL);
1252 EXPORT_SYMBOL(RMF_IDX_INFO);
1253 struct req_msg_field RMF_SHORT_IO =
1254         DEFINE_MSGF("short_io", 0, -1, NULL, NULL);
1255 EXPORT_SYMBOL(RMF_SHORT_IO);
1256 struct req_msg_field RMF_HSM_USER_STATE =
1257         DEFINE_MSGF("hsm_user_state", 0, sizeof(struct hsm_user_state),
1258                     lustre_swab_hsm_user_state, NULL);
1259 EXPORT_SYMBOL(RMF_HSM_USER_STATE);
1260
1261 struct req_msg_field RMF_HSM_STATE_SET =
1262         DEFINE_MSGF("hsm_state_set", 0, sizeof(struct hsm_state_set),
1263                     lustre_swab_hsm_state_set, NULL);
1264 EXPORT_SYMBOL(RMF_HSM_STATE_SET);
1265
1266 struct req_msg_field RMF_MDS_HSM_PROGRESS =
1267         DEFINE_MSGF("hsm_progress", 0, sizeof(struct hsm_progress_kernel),
1268                     lustre_swab_hsm_progress_kernel, NULL);
1269 EXPORT_SYMBOL(RMF_MDS_HSM_PROGRESS);
1270
1271 struct req_msg_field RMF_MDS_HSM_CURRENT_ACTION =
1272         DEFINE_MSGF("hsm_current_action", 0, sizeof(struct hsm_current_action),
1273                     lustre_swab_hsm_current_action, NULL);
1274 EXPORT_SYMBOL(RMF_MDS_HSM_CURRENT_ACTION);
1275
1276 struct req_msg_field RMF_MDS_HSM_USER_ITEM =
1277         DEFINE_MSGF("hsm_user_item", RMF_F_STRUCT_ARRAY,
1278                     sizeof(struct hsm_user_item), lustre_swab_hsm_user_item,
1279                     NULL);
1280 EXPORT_SYMBOL(RMF_MDS_HSM_USER_ITEM);
1281
1282 struct req_msg_field RMF_MDS_HSM_ARCHIVE =
1283         DEFINE_MSGF("hsm_archive", RMF_F_STRUCT_ARRAY,
1284                     sizeof(__u32), lustre_swab_generic_32s, NULL);
1285 EXPORT_SYMBOL(RMF_MDS_HSM_ARCHIVE);
1286
1287 struct req_msg_field RMF_MDS_HSM_REQUEST =
1288         DEFINE_MSGF("hsm_request", 0, sizeof(struct hsm_request),
1289                     lustre_swab_hsm_request, NULL);
1290 EXPORT_SYMBOL(RMF_MDS_HSM_REQUEST);
1291
1292 struct req_msg_field RMF_SWAP_LAYOUTS =
1293         DEFINE_MSGF("swap_layouts", 0, sizeof(struct  mdc_swap_layouts),
1294                     lustre_swab_swap_layouts, NULL);
1295 EXPORT_SYMBOL(RMF_SWAP_LAYOUTS);
1296
1297 struct req_msg_field RMF_LFSCK_REQUEST =
1298         DEFINE_MSGF("lfsck_request", 0, sizeof(struct lfsck_request),
1299                     lustre_swab_lfsck_request, NULL);
1300 EXPORT_SYMBOL(RMF_LFSCK_REQUEST);
1301
1302 struct req_msg_field RMF_LFSCK_REPLY =
1303         DEFINE_MSGF("lfsck_reply", 0, sizeof(struct lfsck_reply),
1304                     lustre_swab_lfsck_reply, NULL);
1305 EXPORT_SYMBOL(RMF_LFSCK_REPLY);
1306
1307 struct req_msg_field RMF_OST_LADVISE_HDR =
1308         DEFINE_MSGF("ladvise_request", 0,
1309                     sizeof(struct ladvise_hdr),
1310                     lustre_swab_ladvise_hdr, NULL);
1311 EXPORT_SYMBOL(RMF_OST_LADVISE_HDR);
1312
1313 struct req_msg_field RMF_OST_LADVISE =
1314         DEFINE_MSGF("ladvise_request", RMF_F_STRUCT_ARRAY,
1315                     sizeof(struct lu_ladvise),
1316                     lustre_swab_ladvise, NULL);
1317 EXPORT_SYMBOL(RMF_OST_LADVISE);
1318
1319 struct req_msg_field RMF_BUT_REPLY =
1320                         DEFINE_MSGF("batch_update_reply", 0, -1,
1321                                     lustre_swab_batch_update_reply, NULL);
1322 EXPORT_SYMBOL(RMF_BUT_REPLY);
1323
1324 struct req_msg_field RMF_BUT_HEADER = DEFINE_MSGF("but_update_header", 0,
1325                                 -1, lustre_swab_but_update_header, NULL);
1326 EXPORT_SYMBOL(RMF_BUT_HEADER);
1327
1328 struct req_msg_field RMF_BUT_BUF = DEFINE_MSGF("but_update_buf",
1329                         RMF_F_STRUCT_ARRAY, sizeof(struct but_update_buffer),
1330                         lustre_swab_but_update_buffer, NULL);
1331 EXPORT_SYMBOL(RMF_BUT_BUF);
1332
1333 /*
1334  * Request formats.
1335  */
1336
1337 struct req_format {
1338         const char *rf_name;
1339         size_t      rf_idx;
1340         struct {
1341                 size_t                       nr;
1342                 const struct req_msg_field **d;
1343         } rf_fields[RCL_NR];
1344 };
1345
1346 #define DEFINE_REQ_FMT(name, client, client_nr, server, server_nr) {    \
1347         .rf_name   = name,                                              \
1348         .rf_fields = {                                                  \
1349                 [RCL_CLIENT] = {                                        \
1350                         .nr = client_nr,                                \
1351                         .d  = client                                    \
1352                 },                                                      \
1353                 [RCL_SERVER] = {                                        \
1354                         .nr = server_nr,                                \
1355                         .d  = server                                    \
1356                 }                                                       \
1357         }                                                               \
1358 }
1359
1360 #define DEFINE_REQ_FMT0(name, client, server)                                  \
1361 DEFINE_REQ_FMT(name, client, ARRAY_SIZE(client), server, ARRAY_SIZE(server))
1362
1363 struct req_format RQF_OBD_PING =
1364         DEFINE_REQ_FMT0("OBD_PING", empty, empty);
1365 EXPORT_SYMBOL(RQF_OBD_PING);
1366
1367 struct req_format RQF_OBD_SET_INFO =
1368         DEFINE_REQ_FMT0("OBD_SET_INFO", obd_set_info_client, empty);
1369 EXPORT_SYMBOL(RQF_OBD_SET_INFO);
1370
1371 struct req_format RQF_MDT_SET_INFO =
1372         DEFINE_REQ_FMT0("MDT_SET_INFO", mdt_set_info_client, empty);
1373 EXPORT_SYMBOL(RQF_MDT_SET_INFO);
1374
1375 /* Read index file through the network */
1376 struct req_format RQF_OBD_IDX_READ =
1377         DEFINE_REQ_FMT0("OBD_IDX_READ",
1378                         obd_idx_read_client, obd_idx_read_server);
1379 EXPORT_SYMBOL(RQF_OBD_IDX_READ);
1380
1381 struct req_format RQF_SEC_CTX =
1382         DEFINE_REQ_FMT0("SEC_CTX", empty, empty);
1383 EXPORT_SYMBOL(RQF_SEC_CTX);
1384
1385 struct req_format RQF_MGS_TARGET_REG =
1386         DEFINE_REQ_FMT0("MGS_TARGET_REG", mgs_target_info_only,
1387                          mgs_target_info_only);
1388 EXPORT_SYMBOL(RQF_MGS_TARGET_REG);
1389
1390 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 18, 53, 0)
1391 struct req_format RQF_MGS_SET_INFO =
1392         DEFINE_REQ_FMT0("MGS_SET_INFO", mgs_set_info,
1393                         mgs_set_info);
1394 EXPORT_SYMBOL(RQF_MGS_SET_INFO);
1395 #endif
1396
1397 struct req_format RQF_MGS_CONFIG_READ =
1398         DEFINE_REQ_FMT0("MGS_CONFIG_READ", mgs_config_read_client,
1399                          mgs_config_read_server);
1400 EXPORT_SYMBOL(RQF_MGS_CONFIG_READ);
1401
1402 struct req_format RQF_SEQ_QUERY =
1403         DEFINE_REQ_FMT0("SEQ_QUERY", seq_query_client, seq_query_server);
1404 EXPORT_SYMBOL(RQF_SEQ_QUERY);
1405
1406 struct req_format RQF_FLD_QUERY =
1407         DEFINE_REQ_FMT0("FLD_QUERY", fld_query_client, fld_query_server);
1408 EXPORT_SYMBOL(RQF_FLD_QUERY);
1409
1410 /* The 'fld_read_server' uses 'RMF_GENERIC_DATA' to hold the 'FLD_QUERY'
1411  * RPC reply that is composed of 'struct lu_seq_range_array'. But there
1412  * is not registered swabber function for 'RMF_GENERIC_DATA'. So the RPC
1413  * peers need to handle the RPC reply with fixed little-endian format.
1414  *
1415  * In theory, we can define new structure with some swabber registered to
1416  * handle the 'FLD_QUERY' RPC reply result automatically. But from the
1417  * implementation view, it is not easy to be done within current "struct
1418  * req_msg_field" framework. Because the sequence range array in the RPC
1419  * reply is not fixed length, instead, its length depends on 'lu_seq_range'
1420  * count, that is unknown when prepare the RPC buffer. Generally, for such
1421  * flexible length RPC usage, there will be a field in the RPC layout to
1422  * indicate the data length. But for the 'FLD_READ' RPC, we have no way to
1423  * do that unless we add new length filed that will broken the on-wire RPC
1424  * protocol and cause interoperability trouble with old peer. */
1425 struct req_format RQF_FLD_READ =
1426         DEFINE_REQ_FMT0("FLD_READ", fld_read_client, fld_read_server);
1427 EXPORT_SYMBOL(RQF_FLD_READ);
1428
1429 struct req_format RQF_MDS_QUOTACTL =
1430         DEFINE_REQ_FMT0("MDS_QUOTACTL", quotactl_only, quotactl_only);
1431 EXPORT_SYMBOL(RQF_MDS_QUOTACTL);
1432
1433 struct req_format RQF_OST_QUOTACTL =
1434         DEFINE_REQ_FMT0("OST_QUOTACTL", quotactl_only, quotactl_only);
1435 EXPORT_SYMBOL(RQF_OST_QUOTACTL);
1436
1437 struct req_format RQF_QUOTA_DQACQ =
1438         DEFINE_REQ_FMT0("QUOTA_DQACQ", quota_body_only, quota_body_only);
1439 EXPORT_SYMBOL(RQF_QUOTA_DQACQ);
1440
1441 struct req_format RQF_LDLM_INTENT_QUOTA =
1442         DEFINE_REQ_FMT0("LDLM_INTENT_QUOTA",
1443                         ldlm_intent_quota_client,
1444                         ldlm_intent_quota_server);
1445 EXPORT_SYMBOL(RQF_LDLM_INTENT_QUOTA);
1446
1447 struct req_format RQF_MDS_GET_ROOT =
1448         DEFINE_REQ_FMT0("MDS_GET_ROOT", mds_get_root_client, mdt_body_capa);
1449 EXPORT_SYMBOL(RQF_MDS_GET_ROOT);
1450
1451 struct req_format RQF_MDS_STATFS =
1452         DEFINE_REQ_FMT0("MDS_STATFS", empty, obd_statfs_server);
1453 EXPORT_SYMBOL(RQF_MDS_STATFS);
1454
1455 struct req_format RQF_MDS_STATFS_NEW =
1456         DEFINE_REQ_FMT0("MDS_STATFS_NEW", mdt_body_only, obd_statfs_server);
1457 EXPORT_SYMBOL(RQF_MDS_STATFS_NEW);
1458
1459 struct req_format RQF_MDS_SYNC =
1460         DEFINE_REQ_FMT0("MDS_SYNC", mdt_body_capa, mdt_body_only);
1461 EXPORT_SYMBOL(RQF_MDS_SYNC);
1462
1463 struct req_format RQF_MDS_GETATTR =
1464         DEFINE_REQ_FMT0("MDS_GETATTR", mdt_body_capa, mds_getattr_server);
1465 EXPORT_SYMBOL(RQF_MDS_GETATTR);
1466
1467 struct req_format RQF_MDS_GETXATTR =
1468         DEFINE_REQ_FMT0("MDS_GETXATTR",
1469                         mds_getxattr_client, mds_getxattr_server);
1470 EXPORT_SYMBOL(RQF_MDS_GETXATTR);
1471
1472 struct req_format RQF_MDS_GETATTR_NAME =
1473         DEFINE_REQ_FMT0("MDS_GETATTR_NAME",
1474                         mds_getattr_name_client, mds_getattr_server);
1475 EXPORT_SYMBOL(RQF_MDS_GETATTR_NAME);
1476
1477 struct req_format RQF_MDS_REINT =
1478         DEFINE_REQ_FMT0("MDS_REINT", mds_reint_client, mdt_body_only);
1479 EXPORT_SYMBOL(RQF_MDS_REINT);
1480
1481 struct req_format RQF_MDS_REINT_CREATE =
1482         DEFINE_REQ_FMT0("MDS_REINT_CREATE",
1483                         mds_reint_create_client, mdt_body_capa);
1484 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE);
1485
1486 struct req_format RQF_MDS_REINT_CREATE_ACL =
1487         DEFINE_REQ_FMT0("MDS_REINT_CREATE_ACL",
1488                         mds_reint_create_acl_client, mdt_body_capa);
1489 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_ACL);
1490
1491 struct req_format RQF_MDS_REINT_CREATE_SLAVE =
1492         DEFINE_REQ_FMT0("MDS_REINT_CREATE_EA",
1493                         mds_reint_create_slave_client, mdt_body_capa);
1494 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SLAVE);
1495
1496 struct req_format RQF_MDS_REINT_CREATE_SYM =
1497         DEFINE_REQ_FMT0("MDS_REINT_CREATE_SYM",
1498                         mds_reint_create_sym_client, mdt_body_capa);
1499 EXPORT_SYMBOL(RQF_MDS_REINT_CREATE_SYM);
1500
1501 struct req_format RQF_MDS_REINT_OPEN =
1502         DEFINE_REQ_FMT0("MDS_REINT_OPEN",
1503                         mds_reint_open_client, mds_reint_open_server);
1504 EXPORT_SYMBOL(RQF_MDS_REINT_OPEN);
1505
1506 struct req_format RQF_MDS_REINT_UNLINK =
1507         DEFINE_REQ_FMT0("MDS_REINT_UNLINK", mds_reint_unlink_client,
1508                         mds_last_unlink_server);
1509 EXPORT_SYMBOL(RQF_MDS_REINT_UNLINK);
1510
1511 struct req_format RQF_MDS_REINT_LINK =
1512         DEFINE_REQ_FMT0("MDS_REINT_LINK",
1513                         mds_reint_link_client, mdt_body_only);
1514 EXPORT_SYMBOL(RQF_MDS_REINT_LINK);
1515
1516 struct req_format RQF_MDS_REINT_RENAME =
1517         DEFINE_REQ_FMT0("MDS_REINT_RENAME", mds_reint_rename_client,
1518                         mds_last_unlink_server);
1519 EXPORT_SYMBOL(RQF_MDS_REINT_RENAME);
1520
1521 struct req_format RQF_MDS_REINT_MIGRATE =
1522         DEFINE_REQ_FMT0("MDS_REINT_MIGRATE", mds_reint_migrate_client,
1523                         mds_last_unlink_server);
1524 EXPORT_SYMBOL(RQF_MDS_REINT_MIGRATE);
1525
1526 struct req_format RQF_MDS_REINT_SETATTR =
1527         DEFINE_REQ_FMT0("MDS_REINT_SETATTR",
1528                         mds_reint_setattr_client, mds_setattr_server);
1529 EXPORT_SYMBOL(RQF_MDS_REINT_SETATTR);
1530
1531 struct req_format RQF_MDS_REINT_SETXATTR =
1532         DEFINE_REQ_FMT0("MDS_REINT_SETXATTR",
1533                         mds_reint_setxattr_client, mdt_body_only);
1534 EXPORT_SYMBOL(RQF_MDS_REINT_SETXATTR);
1535
1536 struct req_format RQF_MDS_REINT_RESYNC =
1537         DEFINE_REQ_FMT0("MDS_REINT_RESYNC", mds_reint_resync, mdt_body_only);
1538 EXPORT_SYMBOL(RQF_MDS_REINT_RESYNC);
1539
1540 struct req_format RQF_MDS_CONNECT =
1541         DEFINE_REQ_FMT0("MDS_CONNECT",
1542                         obd_connect_client, obd_connect_server);
1543 EXPORT_SYMBOL(RQF_MDS_CONNECT);
1544
1545 struct req_format RQF_MDS_DISCONNECT =
1546         DEFINE_REQ_FMT0("MDS_DISCONNECT", empty, empty);
1547 EXPORT_SYMBOL(RQF_MDS_DISCONNECT);
1548
1549 struct req_format RQF_MDS_GET_INFO =
1550         DEFINE_REQ_FMT0("MDS_GET_INFO", mds_getinfo_client,
1551                         mds_getinfo_server);
1552 EXPORT_SYMBOL(RQF_MDS_GET_INFO);
1553
1554 struct req_format RQF_MDS_BATCH =
1555         DEFINE_REQ_FMT0("MDS_BATCH", mds_batch_client,
1556                         mds_batch_server);
1557 EXPORT_SYMBOL(RQF_MDS_BATCH);
1558
1559 struct req_format RQF_LDLM_ENQUEUE =
1560         DEFINE_REQ_FMT0("LDLM_ENQUEUE",
1561                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1562 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE);
1563
1564 struct req_format RQF_LDLM_ENQUEUE_LVB =
1565         DEFINE_REQ_FMT0("LDLM_ENQUEUE_LVB",
1566                         ldlm_enqueue_client, ldlm_enqueue_lvb_server);
1567 EXPORT_SYMBOL(RQF_LDLM_ENQUEUE_LVB);
1568
1569 struct req_format RQF_LDLM_CONVERT =
1570         DEFINE_REQ_FMT0("LDLM_CONVERT",
1571                         ldlm_enqueue_client, ldlm_enqueue_server);
1572 EXPORT_SYMBOL(RQF_LDLM_CONVERT);
1573
1574 struct req_format RQF_LDLM_CANCEL =
1575         DEFINE_REQ_FMT0("LDLM_CANCEL", ldlm_enqueue_client, empty);
1576 EXPORT_SYMBOL(RQF_LDLM_CANCEL);
1577
1578 struct req_format RQF_LDLM_CALLBACK =
1579         DEFINE_REQ_FMT0("LDLM_CALLBACK", ldlm_enqueue_client, empty);
1580 EXPORT_SYMBOL(RQF_LDLM_CALLBACK);
1581
1582 struct req_format RQF_LDLM_CP_CALLBACK =
1583         DEFINE_REQ_FMT0("LDLM_CP_CALLBACK", ldlm_cp_callback_client, empty);
1584 EXPORT_SYMBOL(RQF_LDLM_CP_CALLBACK);
1585
1586 struct req_format RQF_LDLM_BL_CALLBACK =
1587         DEFINE_REQ_FMT0("LDLM_BL_CALLBACK", ldlm_enqueue_client, empty);
1588 EXPORT_SYMBOL(RQF_LDLM_BL_CALLBACK);
1589
1590 struct req_format RQF_LDLM_GL_CALLBACK =
1591         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_enqueue_client,
1592                         ldlm_gl_callback_server);
1593 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK);
1594
1595 struct req_format RQF_LDLM_GL_CALLBACK_DESC =
1596         DEFINE_REQ_FMT0("LDLM_GL_CALLBACK", ldlm_gl_callback_desc_client,
1597                         ldlm_gl_callback_server);
1598 EXPORT_SYMBOL(RQF_LDLM_GL_CALLBACK_DESC);
1599
1600 struct req_format RQF_LDLM_INTENT_BASIC =
1601         DEFINE_REQ_FMT0("LDLM_INTENT_BASIC",
1602                         ldlm_intent_basic_client, ldlm_enqueue_lvb_server);
1603 EXPORT_SYMBOL(RQF_LDLM_INTENT_BASIC);
1604
1605 struct req_format RQF_LDLM_INTENT =
1606         DEFINE_REQ_FMT0("LDLM_INTENT",
1607                         ldlm_intent_client, ldlm_intent_server);
1608 EXPORT_SYMBOL(RQF_LDLM_INTENT);
1609
1610 struct req_format RQF_LDLM_INTENT_LAYOUT =
1611         DEFINE_REQ_FMT0("LDLM_INTENT_LAYOUT",
1612                         ldlm_intent_layout_client, ldlm_enqueue_lvb_server);
1613 EXPORT_SYMBOL(RQF_LDLM_INTENT_LAYOUT);
1614
1615 struct req_format RQF_LDLM_INTENT_GETATTR =
1616         DEFINE_REQ_FMT0("LDLM_INTENT_GETATTR",
1617                         ldlm_intent_getattr_client, ldlm_intent_getattr_server);
1618 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETATTR);
1619
1620 struct req_format RQF_LDLM_INTENT_OPEN =
1621         DEFINE_REQ_FMT0("LDLM_INTENT_OPEN",
1622                         ldlm_intent_open_client, ldlm_intent_open_server);
1623 EXPORT_SYMBOL(RQF_LDLM_INTENT_OPEN);
1624
1625 struct req_format RQF_LDLM_INTENT_CREATE =
1626         DEFINE_REQ_FMT0("LDLM_INTENT_CREATE",
1627                         ldlm_intent_create_client, ldlm_intent_getattr_server);
1628 EXPORT_SYMBOL(RQF_LDLM_INTENT_CREATE);
1629
1630 struct req_format RQF_LDLM_INTENT_GETXATTR =
1631         DEFINE_REQ_FMT0("LDLM_INTENT_GETXATTR",
1632                         ldlm_intent_getxattr_client,
1633                         ldlm_intent_getxattr_server);
1634 EXPORT_SYMBOL(RQF_LDLM_INTENT_GETXATTR);
1635
1636 struct req_format RQF_MDS_CLOSE =
1637         DEFINE_REQ_FMT0("MDS_CLOSE",
1638                         mdt_close_client, mds_last_unlink_server);
1639 EXPORT_SYMBOL(RQF_MDS_CLOSE);
1640
1641 struct req_format RQF_MDS_CLOSE_INTENT =
1642         DEFINE_REQ_FMT0("MDS_CLOSE_INTENT",
1643                         mdt_close_intent_client, mds_last_unlink_server);
1644 EXPORT_SYMBOL(RQF_MDS_CLOSE_INTENT);
1645
1646 struct req_format RQF_MDS_READPAGE =
1647         DEFINE_REQ_FMT0("MDS_READPAGE",
1648                         mdt_body_capa, mdt_body_only);
1649 EXPORT_SYMBOL(RQF_MDS_READPAGE);
1650
1651 struct req_format RQF_MDS_HSM_ACTION =
1652         DEFINE_REQ_FMT0("MDS_HSM_ACTION", mdt_body_capa, mdt_hsm_action_server);
1653 EXPORT_SYMBOL(RQF_MDS_HSM_ACTION);
1654
1655 struct req_format RQF_MDS_HSM_PROGRESS =
1656         DEFINE_REQ_FMT0("MDS_HSM_PROGRESS", mdt_hsm_progress, empty);
1657 EXPORT_SYMBOL(RQF_MDS_HSM_PROGRESS);
1658
1659 struct req_format RQF_MDS_HSM_CT_REGISTER =
1660         DEFINE_REQ_FMT0("MDS_HSM_CT_REGISTER", mdt_hsm_ct_register, empty);
1661 EXPORT_SYMBOL(RQF_MDS_HSM_CT_REGISTER);
1662
1663 struct req_format RQF_MDS_HSM_CT_UNREGISTER =
1664         DEFINE_REQ_FMT0("MDS_HSM_CT_UNREGISTER", mdt_hsm_ct_unregister, empty);
1665 EXPORT_SYMBOL(RQF_MDS_HSM_CT_UNREGISTER);
1666
1667 struct req_format RQF_MDS_HSM_STATE_GET =
1668         DEFINE_REQ_FMT0("MDS_HSM_STATE_GET",
1669                         mdt_body_capa, mdt_hsm_state_get_server);
1670 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_GET);
1671
1672 struct req_format RQF_MDS_HSM_STATE_SET =
1673         DEFINE_REQ_FMT0("MDS_HSM_STATE_SET", mdt_hsm_state_set, empty);
1674 EXPORT_SYMBOL(RQF_MDS_HSM_STATE_SET);
1675
1676 struct req_format RQF_MDS_HSM_REQUEST =
1677         DEFINE_REQ_FMT0("MDS_HSM_REQUEST", mdt_hsm_request, empty);
1678 EXPORT_SYMBOL(RQF_MDS_HSM_REQUEST);
1679
1680 struct req_format RQF_MDS_SWAP_LAYOUTS =
1681         DEFINE_REQ_FMT0("MDS_SWAP_LAYOUTS",
1682                         mdt_swap_layouts, empty);
1683 EXPORT_SYMBOL(RQF_MDS_SWAP_LAYOUTS);
1684
1685 struct req_format RQF_MDS_RMFID =
1686         DEFINE_REQ_FMT0("MDS_RMFID", mds_rmfid_client,
1687                         mds_rmfid_server);
1688 EXPORT_SYMBOL(RQF_MDS_RMFID);
1689
1690 struct req_format RQF_LLOG_ORIGIN_HANDLE_CREATE =
1691         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_CREATE",
1692                         llog_origin_handle_create_client, llogd_body_only);
1693 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_CREATE);
1694
1695 struct req_format RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK =
1696         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_NEXT_BLOCK",
1697                         llogd_body_only, llog_origin_handle_next_block_server);
1698 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
1699
1700 struct req_format RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK =
1701         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_PREV_BLOCK",
1702                         llogd_body_only, llog_origin_handle_next_block_server);
1703 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_PREV_BLOCK);
1704
1705 struct req_format RQF_LLOG_ORIGIN_HANDLE_READ_HEADER =
1706         DEFINE_REQ_FMT0("LLOG_ORIGIN_HANDLE_READ_HEADER",
1707                         llogd_body_only, llog_log_hdr_only);
1708 EXPORT_SYMBOL(RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
1709
1710 struct req_format RQF_CONNECT =
1711         DEFINE_REQ_FMT0("CONNECT", obd_connect_client, obd_connect_server);
1712 EXPORT_SYMBOL(RQF_CONNECT);
1713
1714 struct req_format RQF_OST_CONNECT =
1715         DEFINE_REQ_FMT0("OST_CONNECT",
1716                         obd_connect_client, obd_connect_server);
1717 EXPORT_SYMBOL(RQF_OST_CONNECT);
1718
1719 struct req_format RQF_OST_DISCONNECT =
1720         DEFINE_REQ_FMT0("OST_DISCONNECT", empty, empty);
1721 EXPORT_SYMBOL(RQF_OST_DISCONNECT);
1722
1723 struct req_format RQF_OST_GETATTR =
1724         DEFINE_REQ_FMT0("OST_GETATTR", ost_body_capa, ost_body_only);
1725 EXPORT_SYMBOL(RQF_OST_GETATTR);
1726
1727 struct req_format RQF_OST_SETATTR =
1728         DEFINE_REQ_FMT0("OST_SETATTR", ost_body_capa, ost_body_only);
1729 EXPORT_SYMBOL(RQF_OST_SETATTR);
1730
1731 struct req_format RQF_OST_CREATE =
1732         DEFINE_REQ_FMT0("OST_CREATE", ost_body_only, ost_body_only);
1733 EXPORT_SYMBOL(RQF_OST_CREATE);
1734
1735 struct req_format RQF_OST_PUNCH =
1736         DEFINE_REQ_FMT0("OST_PUNCH", ost_body_capa, ost_body_only);
1737 EXPORT_SYMBOL(RQF_OST_PUNCH);
1738
1739 struct req_format RQF_OST_FALLOCATE =
1740         DEFINE_REQ_FMT0("OST_FALLOCATE", ost_body_capa, ost_body_only);
1741 EXPORT_SYMBOL(RQF_OST_FALLOCATE);
1742
1743 struct req_format RQF_OST_SEEK =
1744         DEFINE_REQ_FMT0("OST_SEEK", ost_body_only, ost_body_only);
1745 EXPORT_SYMBOL(RQF_OST_SEEK);
1746
1747 struct req_format RQF_OST_SYNC =
1748         DEFINE_REQ_FMT0("OST_SYNC", ost_body_capa, ost_body_only);
1749 EXPORT_SYMBOL(RQF_OST_SYNC);
1750
1751 struct req_format RQF_OST_DESTROY =
1752         DEFINE_REQ_FMT0("OST_DESTROY", ost_destroy_client, ost_body_only);
1753 EXPORT_SYMBOL(RQF_OST_DESTROY);
1754
1755 struct req_format RQF_OST_BRW_READ =
1756         DEFINE_REQ_FMT0("OST_BRW_READ", ost_brw_client, ost_brw_read_server);
1757 EXPORT_SYMBOL(RQF_OST_BRW_READ);
1758
1759 struct req_format RQF_OST_BRW_WRITE =
1760         DEFINE_REQ_FMT0("OST_BRW_WRITE", ost_brw_client, ost_brw_write_server);
1761 EXPORT_SYMBOL(RQF_OST_BRW_WRITE);
1762
1763 struct req_format RQF_OST_STATFS =
1764         DEFINE_REQ_FMT0("OST_STATFS", empty, obd_statfs_server);
1765 EXPORT_SYMBOL(RQF_OST_STATFS);
1766
1767 struct req_format RQF_OST_SET_GRANT_INFO =
1768         DEFINE_REQ_FMT0("OST_SET_GRANT_INFO", ost_grant_shrink_client,
1769                          ost_body_only);
1770 EXPORT_SYMBOL(RQF_OST_SET_GRANT_INFO);
1771
1772 struct req_format RQF_OST_GET_INFO =
1773         DEFINE_REQ_FMT0("OST_GET_INFO", ost_get_info_generic_client,
1774                                         ost_get_info_generic_server);
1775 EXPORT_SYMBOL(RQF_OST_GET_INFO);
1776
1777 struct req_format RQF_OST_GET_INFO_LAST_ID =
1778         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_ID", ost_get_info_generic_client,
1779                                                 ost_get_last_id_server);
1780 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_ID);
1781
1782 struct req_format RQF_OST_GET_INFO_LAST_FID =
1783         DEFINE_REQ_FMT0("OST_GET_INFO_LAST_FID", ost_get_last_fid_client,
1784                                                  ost_get_last_fid_server);
1785 EXPORT_SYMBOL(RQF_OST_GET_INFO_LAST_FID);
1786
1787 struct req_format RQF_OST_SET_INFO_LAST_FID =
1788         DEFINE_REQ_FMT0("OST_SET_INFO_LAST_FID", obd_set_info_client,
1789                                                  empty);
1790 EXPORT_SYMBOL(RQF_OST_SET_INFO_LAST_FID);
1791
1792 struct req_format RQF_OST_GET_INFO_FIEMAP =
1793         DEFINE_REQ_FMT0("OST_GET_INFO_FIEMAP", ost_get_fiemap_client,
1794                                                ost_get_fiemap_server);
1795 EXPORT_SYMBOL(RQF_OST_GET_INFO_FIEMAP);
1796
1797 struct req_format RQF_LFSCK_NOTIFY =
1798         DEFINE_REQ_FMT0("LFSCK_NOTIFY", obd_lfsck_request, empty);
1799 EXPORT_SYMBOL(RQF_LFSCK_NOTIFY);
1800
1801 struct req_format RQF_LFSCK_QUERY =
1802         DEFINE_REQ_FMT0("LFSCK_QUERY", obd_lfsck_request, obd_lfsck_reply);
1803 EXPORT_SYMBOL(RQF_LFSCK_QUERY);
1804
1805 struct req_format RQF_OST_LADVISE =
1806         DEFINE_REQ_FMT0("OST_LADVISE", ost_ladvise, ost_body_only);
1807 EXPORT_SYMBOL(RQF_OST_LADVISE);
1808
1809 /* Convenience macro */
1810 #define FMT_FIELD(fmt, i, j) (fmt)->rf_fields[(i)].d[(j)]
1811
1812 /**
1813  * Initializes the capsule abstraction by computing and setting the \a rf_idx
1814  * field of RQFs and the \a rmf_offset field of RMFs.
1815  */
1816 int req_layout_init(void)
1817 {
1818         size_t i;
1819         size_t j;
1820         size_t k;
1821         struct req_format *rf = NULL;
1822
1823         for (i = 0; i < ARRAY_SIZE(req_formats); ++i) {
1824                 rf = req_formats[i];
1825                 rf->rf_idx = i;
1826                 for (j = 0; j < RCL_NR; ++j) {
1827                         LASSERT(rf->rf_fields[j].nr <= REQ_MAX_FIELD_NR);
1828                         for (k = 0; k < rf->rf_fields[j].nr; ++k) {
1829                                 struct req_msg_field *field;
1830
1831                                 field = (typeof(field))rf->rf_fields[j].d[k];
1832                                 LASSERT(!(field->rmf_flags & RMF_F_STRUCT_ARRAY)
1833                                         || field->rmf_size > 0);
1834                                 LASSERT(field->rmf_offset[i][j] == 0);
1835                                 /*
1836                                  * k + 1 to detect unused format/field
1837                                  * combinations.
1838                                  */
1839                                 field->rmf_offset[i][j] = k + 1;
1840                         }
1841                 }
1842         }
1843         return 0;
1844 }
1845 EXPORT_SYMBOL(req_layout_init);
1846
1847 void req_layout_fini(void)
1848 {
1849 }
1850 EXPORT_SYMBOL(req_layout_fini);
1851
1852 /**
1853  * Initializes the expected sizes of each RMF in a \a pill (\a rc_area) to -1.
1854  *
1855  * Actual/expected field sizes are set elsewhere in functions in this file:
1856  * req_capsule_init(), req_capsule_server_pack(), req_capsule_set_size() and
1857  * req_capsule_msg_size().  The \a rc_area information is used by.
1858  * ptlrpc_request_set_replen().
1859  */
1860 void req_capsule_init_area(struct req_capsule *pill)
1861 {
1862         size_t i;
1863
1864         for (i = 0; i < ARRAY_SIZE(pill->rc_area[RCL_CLIENT]); i++) {
1865                 pill->rc_area[RCL_CLIENT][i] = -1;
1866                 pill->rc_area[RCL_SERVER][i] = -1;
1867         }
1868 }
1869 EXPORT_SYMBOL(req_capsule_init_area);
1870
1871 /**
1872  * Initialize a pill.
1873  *
1874  * The \a location indicates whether the caller is executing on the client side
1875  * (RCL_CLIENT) or server side (RCL_SERVER)..
1876  */
1877 void req_capsule_init(struct req_capsule *pill,
1878                       struct ptlrpc_request *req,
1879                       enum req_location location)
1880 {
1881         LASSERT(location == RCL_SERVER || location == RCL_CLIENT);
1882
1883         /*
1884          * Today all capsules are embedded in ptlrpc_request structs,
1885          * but just in case that ever isn't the case, we don't reach
1886          * into req unless req != NULL and pill is the one embedded in
1887          * the req.
1888          *
1889          * The req->rq_pill_init flag makes it safe to initialize a pill
1890          * twice, which might happen in the OST paths as a result of the
1891          * high-priority RPC queue getting peeked at before ost_handle()
1892          * handles an OST RPC.
1893          */
1894         if (req != NULL && pill == &req->rq_pill && req->rq_pill_init)
1895                 return;
1896
1897         pill->rc_fmt = NULL;
1898         pill->rc_req = req;
1899         pill->rc_loc = location;
1900         req_capsule_init_area(pill);
1901
1902         if (req != NULL && pill == &req->rq_pill)
1903                 req->rq_pill_init = 1;
1904 }
1905 EXPORT_SYMBOL(req_capsule_init);
1906
1907 void req_capsule_fini(struct req_capsule *pill)
1908 {
1909 }
1910 EXPORT_SYMBOL(req_capsule_fini);
1911
1912 static int __req_format_is_sane(const struct req_format *fmt)
1913 {
1914         return fmt->rf_idx < ARRAY_SIZE(req_formats) &&
1915                 req_formats[fmt->rf_idx] == fmt;
1916 }
1917
1918 static struct lustre_msg *__req_msg(const struct req_capsule *pill,
1919                                     enum req_location loc)
1920 {
1921         return loc == RCL_CLIENT ? pill->rc_reqmsg : pill->rc_repmsg;
1922 }
1923
1924 /**
1925  * Set the format (\a fmt) of a \a pill; format changes are not allowed here
1926  * (see req_capsule_extend()).
1927  */
1928 void req_capsule_set(struct req_capsule *pill, const struct req_format *fmt)
1929 {
1930         LASSERT(pill->rc_fmt == NULL || pill->rc_fmt == fmt);
1931         LASSERT(__req_format_is_sane(fmt));
1932
1933         pill->rc_fmt = fmt;
1934 }
1935 EXPORT_SYMBOL(req_capsule_set);
1936
1937 /**
1938  * Fills in any parts of the \a rc_area of a \a pill that haven't been filled in
1939  * yet.
1940
1941  * \a rc_area is an array of REQ_MAX_FIELD_NR elements, used to store sizes of
1942  * variable-sized fields.  The field sizes come from the declared \a rmf_size
1943  * field of a \a pill's \a rc_fmt's RMF's.
1944  */
1945 size_t req_capsule_filled_sizes(struct req_capsule *pill,
1946                                 enum req_location loc)
1947 {
1948         const struct req_format *fmt = pill->rc_fmt;
1949         size_t                   i;
1950
1951         LASSERT(fmt != NULL);
1952
1953         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
1954                 if (pill->rc_area[loc][i] == -1) {
1955                         pill->rc_area[loc][i] =
1956                                             fmt->rf_fields[loc].d[i]->rmf_size;
1957                         if (pill->rc_area[loc][i] == -1) {
1958                                 /*
1959                                  * Skip the following fields.
1960                                  *
1961                                  * If this LASSERT() trips then you're missing a
1962                                  * call to req_capsule_set_size().
1963                                  */
1964                                 LASSERT(loc != RCL_SERVER);
1965                                 break;
1966                         }
1967                 }
1968         }
1969         return i;
1970 }
1971 EXPORT_SYMBOL(req_capsule_filled_sizes);
1972
1973 /**
1974  * Capsule equivalent of lustre_pack_request() and lustre_pack_reply().
1975  *
1976  * This function uses the \a pill's \a rc_area as filled in by
1977  * req_capsule_set_size() or req_capsule_filled_sizes() (the latter is called by
1978  * this function).
1979  */
1980 int req_capsule_server_pack(struct req_capsule *pill)
1981 {
1982         const struct req_format *fmt;
1983         int count;
1984         int rc;
1985
1986         LASSERT(pill->rc_loc == RCL_SERVER);
1987         fmt = pill->rc_fmt;
1988         LASSERT(fmt != NULL);
1989
1990         count = req_capsule_filled_sizes(pill, RCL_SERVER);
1991         if (req_capsule_ptlreq(pill)) {
1992                 rc = lustre_pack_reply(pill->rc_req, count,
1993                                        pill->rc_area[RCL_SERVER], NULL);
1994                 if (rc != 0) {
1995                         DEBUG_REQ(D_ERROR, pill->rc_req,
1996                                   "Cannot pack %d fields in format '%s'",
1997                                    count, fmt->rf_name);
1998                 }
1999         } else { /* SUB request */
2000                 __u32 msg_len;
2001
2002                 msg_len = lustre_msg_size_v2(count, pill->rc_area[RCL_SERVER]);
2003                 if (msg_len > pill->rc_reqmsg->lm_repsize) {
2004                         /* TODO: Check whether there is enough buffer size */
2005                         CDEBUG(D_INFO,
2006                                "Overflow pack %d fields in format '%s' for "
2007                                "the SUB request with message len %u:%u\n",
2008                                count, fmt->rf_name, msg_len,
2009                                pill->rc_reqmsg->lm_repsize);
2010                 }
2011
2012                 rc = 0;
2013                 lustre_init_msg_v2(pill->rc_repmsg, count,
2014                                    pill->rc_area[RCL_SERVER], NULL);
2015         }
2016
2017         return rc;
2018 }
2019 EXPORT_SYMBOL(req_capsule_server_pack);
2020
2021 int req_capsule_client_pack(struct req_capsule *pill)
2022 {
2023         const struct req_format *fmt;
2024         int count;
2025         int rc = 0;
2026
2027         LASSERT(pill->rc_loc == RCL_CLIENT);
2028         fmt = pill->rc_fmt;
2029         LASSERT(fmt != NULL);
2030
2031         count = req_capsule_filled_sizes(pill, RCL_CLIENT);
2032         if (req_capsule_ptlreq(pill)) {
2033                 struct ptlrpc_request *req = pill->rc_req;
2034
2035                 rc = lustre_pack_request(req, req->rq_import->imp_msg_magic,
2036                                          count, pill->rc_area[RCL_CLIENT],
2037                                          NULL);
2038         } else {
2039                 /* Sub request in a batch PTLRPC request */
2040                 lustre_init_msg_v2(pill->rc_reqmsg, count,
2041                                    pill->rc_area[RCL_CLIENT], NULL);
2042         }
2043         return rc;
2044 }
2045 EXPORT_SYMBOL(req_capsule_client_pack);
2046
2047 /**
2048  * Returns the PTLRPC request or reply (\a loc) buffer offset of a \a pill
2049  * corresponding to the given RMF (\a field).
2050  */
2051 __u32 __req_capsule_offset(const struct req_capsule *pill,
2052                            const struct req_msg_field *field,
2053                            enum req_location loc)
2054 {
2055         unsigned int offset;
2056
2057         offset = field->rmf_offset[pill->rc_fmt->rf_idx][loc];
2058         LASSERTF(offset > 0, "%s:%s, off=%d, loc=%d\n",
2059                              pill->rc_fmt->rf_name,
2060                              field->rmf_name, offset, loc);
2061         offset--;
2062
2063         LASSERT(offset < REQ_MAX_FIELD_NR);
2064         return offset;
2065 }
2066
2067 void req_capsule_set_swabbed(struct req_capsule *pill, enum req_location loc,
2068                             __u32 index)
2069 {
2070         if (loc == RCL_CLIENT)
2071                 req_capsule_set_req_swabbed(pill, index);
2072         else
2073                 req_capsule_set_rep_swabbed(pill, index);
2074 }
2075
2076 bool req_capsule_need_swab(struct req_capsule *pill, enum req_location loc,
2077                            __u32 index)
2078 {
2079         if (loc == RCL_CLIENT)
2080                 return (req_capsule_req_need_swab(pill) &&
2081                         !req_capsule_req_swabbed(pill, index));
2082
2083         return (req_capsule_rep_need_swab(pill) &&
2084                !req_capsule_rep_swabbed(pill, index));
2085 }
2086
2087 /**
2088  * Helper for __req_capsule_get(); swabs value / array of values and/or dumps
2089  * them if desired.
2090  */
2091 static int
2092 swabber_dumper_helper(struct req_capsule *pill,
2093                       const struct req_msg_field *field,
2094                       enum req_location loc,
2095                       int offset,
2096                       void *value, int len, bool dump, void (*swabber)(void *))
2097 {
2098         void *p;
2099         int i;
2100         int n;
2101         int size;
2102         int rc = 0;
2103         bool do_swab;
2104         bool array = field->rmf_flags & RMF_F_STRUCT_ARRAY;
2105
2106         swabber = swabber ?: field->rmf_swabber;
2107
2108         if (req_capsule_need_swab(pill, loc, offset) &&
2109             (swabber != NULL || field->rmf_swab_len != NULL) && value != NULL)
2110                 do_swab = true;
2111         else
2112                 do_swab = false;
2113
2114         if (!field->rmf_dumper)
2115                 dump = false;
2116
2117         /*
2118          * We're swabbing an array; swabber() swabs a single array element, so
2119          * swab every element.
2120          */
2121         if (array && (len % field->rmf_size)) {
2122                 static const struct req_msg_field *last_field;
2123
2124                 if (field != last_field) {
2125                         CERROR("%s: array buffer size %u is not a multiple of element size %u\n",
2126                                field->rmf_name, len, field->rmf_size);
2127                         last_field = field;
2128                 }
2129         }
2130         /* For the non-array cases, the process of swab/dump/swab only
2131          * needs to be done once. (n = 1)
2132          */
2133         if (!array)
2134                 len = field->rmf_size;
2135         for (p = value, i = 0, n = len / field->rmf_size;
2136              i < n;
2137              i++, p += field->rmf_size) {
2138                 if (dump) {
2139                         CDEBUG(D_RPCTRACE, "Dump of %s%sfield %s element %d follows\n",
2140                                do_swab ? "unswabbed " : "",
2141                                array ? "array " : "",
2142                                field->rmf_name, i);
2143                         field->rmf_dumper(p);
2144                 }
2145                 if (!do_swab) {
2146                         if (array)
2147                                 continue;
2148                         else
2149                                 break;
2150                 }
2151                 if (!field->rmf_swab_len) {
2152                         swabber(p);
2153                 } else {
2154                         size = field->rmf_swab_len(p, len);
2155                         if (size > 0) {
2156                                 len -= size;
2157                         } else {
2158                                 rc = size;
2159                                 break;
2160                         }
2161                 }
2162                 if (dump) {
2163                         CDEBUG(D_RPCTRACE, "Dump of swabbed %sfield %s, element %d follows\n",
2164                                array ? "array " : "", field->rmf_name, i);
2165                         field->rmf_dumper(value);
2166                 }
2167         }
2168         if (do_swab)
2169                 req_capsule_set_swabbed(pill, loc, offset);
2170
2171         return rc;
2172 }
2173
2174 /**
2175  * Returns the pointer to a PTLRPC request or reply (\a loc) buffer of a \a pill
2176  * corresponding to the given RMF (\a field).
2177  *
2178  * The buffer will be swabbed using the given \a swabber.  If \a swabber == NULL
2179  * then the \a rmf_swabber from the RMF will be used.  Soon there will be no
2180  * calls to __req_capsule_get() with a non-NULL \a swabber; \a swabber will then
2181  * be removed.  Fields with the \a RMF_F_STRUCT_ARRAY flag set will have each
2182  * element of the array swabbed.
2183  */
2184 static void *__req_capsule_get(struct req_capsule *pill,
2185                                const struct req_msg_field *field,
2186                                enum req_location loc,
2187                                void (*swabber)(void *),
2188                                bool dump)
2189 {
2190         const struct req_format *fmt;
2191         struct lustre_msg       *msg;
2192         void                    *value;
2193         __u32                    len;
2194         __u32                    offset;
2195
2196         void *(*getter)(struct lustre_msg *m, __u32 n, __u32 minlen);
2197
2198         static const char *rcl_names[RCL_NR] = {
2199                 [RCL_CLIENT] = "client",
2200                 [RCL_SERVER] = "server"
2201         };
2202
2203         LASSERT(pill != NULL);
2204         LASSERT(pill != LP_POISON);
2205         fmt = pill->rc_fmt;
2206         LASSERT(fmt != NULL);
2207         LASSERT(fmt != LP_POISON);
2208         LASSERT(__req_format_is_sane(fmt));
2209
2210         offset = __req_capsule_offset(pill, field, loc);
2211
2212         msg = __req_msg(pill, loc);
2213         LASSERT(msg != NULL);
2214
2215         getter = (field->rmf_flags & RMF_F_STRING) ?
2216                 (typeof(getter))lustre_msg_string : lustre_msg_buf;
2217
2218         if (field->rmf_flags & (RMF_F_STRUCT_ARRAY|RMF_F_NO_SIZE_CHECK)) {
2219                 /*
2220                  * We've already asserted that field->rmf_size > 0 in
2221                  * req_layout_init().
2222                  */
2223                 len = lustre_msg_buflen(msg, offset);
2224                 if (!(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
2225                     (len % field->rmf_size) != 0) {
2226                         CERROR("%s: array field size mismatch "
2227                                 "%d modulo %u != 0 (%d)\n",
2228                                 field->rmf_name, len, field->rmf_size, loc);
2229                         return NULL;
2230                 }
2231         } else if (pill->rc_area[loc][offset] != -1) {
2232                 len = pill->rc_area[loc][offset];
2233         } else {
2234                 len = max_t(typeof(field->rmf_size), field->rmf_size, 0);
2235         }
2236         value = getter(msg, offset, len);
2237
2238         if (value == NULL) {
2239                 LASSERT(pill->rc_req != NULL);
2240                 DEBUG_REQ(D_ERROR, pill->rc_req,
2241                            "Wrong buffer for field '%s' (%u of %u) in format '%s', %u vs. %u (%s)",
2242                            field->rmf_name, offset, lustre_msg_bufcount(msg),
2243                            fmt->rf_name, lustre_msg_buflen(msg, offset), len,
2244                            rcl_names[loc]);
2245         } else {
2246                 swabber_dumper_helper(pill, field, loc, offset, value, len,
2247                                       dump, swabber);
2248         }
2249
2250         return value;
2251 }
2252
2253 /**
2254  * Dump a request and/or reply
2255  */
2256 void __req_capsule_dump(struct req_capsule *pill, enum req_location loc)
2257 {
2258         const struct req_format *fmt;
2259         const struct req_msg_field *field;
2260         __u32 len;
2261         size_t i;
2262
2263         fmt = pill->rc_fmt;
2264
2265         DEBUG_REQ(D_RPCTRACE, pill->rc_req, "BEGIN REQ CAPSULE DUMP");
2266         for (i = 0; i < fmt->rf_fields[loc].nr; ++i) {
2267                 field = FMT_FIELD(fmt, loc, i);
2268                 if (field->rmf_dumper == NULL) {
2269                         /*
2270                          * FIXME Add a default hex dumper for fields that don't
2271                          * have a specific dumper
2272                          */
2273                         len = req_capsule_get_size(pill, field, loc);
2274                         CDEBUG(D_RPCTRACE,
2275                                "Field %s has no dumper function; field size is %u\n",
2276                                field->rmf_name, len);
2277                 } else {
2278                         /* It's dumping side-effect that we're interested in */
2279                         (void) __req_capsule_get(pill, field, loc, NULL, true);
2280                 }
2281         }
2282         CDEBUG(D_RPCTRACE, "END REQ CAPSULE DUMP\n");
2283 }
2284
2285 /**
2286  * Dump a request.
2287  */
2288 void req_capsule_client_dump(struct req_capsule *pill)
2289 {
2290         __req_capsule_dump(pill, RCL_CLIENT);
2291 }
2292 EXPORT_SYMBOL(req_capsule_client_dump);
2293
2294 /**
2295  * Dump a reply
2296  */
2297 void req_capsule_server_dump(struct req_capsule *pill)
2298 {
2299         __req_capsule_dump(pill, RCL_SERVER);
2300 }
2301 EXPORT_SYMBOL(req_capsule_server_dump);
2302
2303 /**
2304  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC request
2305  * buffer corresponding to the given RMF (\a field) of a \a pill.
2306  */
2307 void *req_capsule_client_get(struct req_capsule *pill,
2308                              const struct req_msg_field *field)
2309 {
2310         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, false);
2311 }
2312 EXPORT_SYMBOL(req_capsule_client_get);
2313
2314 /**
2315  * Same as req_capsule_client_get(), but with a \a swabber argument.
2316  *
2317  * Currently unused; will be removed when req_capsule_server_swab_get() is
2318  * unused too.
2319  */
2320 void *req_capsule_client_swab_get(struct req_capsule *pill,
2321                                   const struct req_msg_field *field,
2322                                   void *swabber)
2323 {
2324         return __req_capsule_get(pill, field, RCL_CLIENT, swabber, false);
2325 }
2326 EXPORT_SYMBOL(req_capsule_client_swab_get);
2327
2328 /**
2329  * Utility that combines req_capsule_set_size() and req_capsule_client_get().
2330  *
2331  * First the \a pill's request \a field's size is set (\a rc_area) using
2332  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2333  * returned.
2334  */
2335 void *req_capsule_client_sized_get(struct req_capsule *pill,
2336                                    const struct req_msg_field *field,
2337                                    __u32 len)
2338 {
2339         req_capsule_set_size(pill, field, RCL_CLIENT, len);
2340         return __req_capsule_get(pill, field, RCL_CLIENT, NULL, false);
2341 }
2342 EXPORT_SYMBOL(req_capsule_client_sized_get);
2343
2344 /**
2345  * Trivial wrapper around __req_capsule_get(), that returns the PTLRPC reply
2346  * buffer corresponding to the given RMF (\a field) of a \a pill.
2347  */
2348 void *req_capsule_server_get(struct req_capsule *pill,
2349                              const struct req_msg_field *field)
2350 {
2351         return __req_capsule_get(pill, field, RCL_SERVER, NULL, false);
2352 }
2353 EXPORT_SYMBOL(req_capsule_server_get);
2354
2355 /**
2356  * Same as req_capsule_server_get(), but with a \a swabber argument.
2357  *
2358  * Ideally all swabbing should be done pursuant to RMF definitions, with no
2359  * swabbing done outside this capsule abstraction.
2360  */
2361 void *req_capsule_server_swab_get(struct req_capsule *pill,
2362                                   const struct req_msg_field *field,
2363                                   void *swabber)
2364 {
2365         return __req_capsule_get(pill, field, RCL_SERVER, swabber, false);
2366 }
2367 EXPORT_SYMBOL(req_capsule_server_swab_get);
2368
2369 /**
2370  * Utility that combines req_capsule_set_size() and req_capsule_server_get().
2371  *
2372  * First the \a pill's request \a field's size is set (\a rc_area) using
2373  * req_capsule_set_size() with the given \a len.  Then the actual buffer is
2374  * returned.
2375  */
2376 void *req_capsule_server_sized_get(struct req_capsule *pill,
2377                                    const struct req_msg_field *field,
2378                                    __u32 len)
2379 {
2380         req_capsule_set_size(pill, field, RCL_SERVER, len);
2381         return __req_capsule_get(pill, field, RCL_SERVER, NULL, false);
2382 }
2383 EXPORT_SYMBOL(req_capsule_server_sized_get);
2384
2385 void *req_capsule_server_sized_swab_get(struct req_capsule *pill,
2386                                         const struct req_msg_field *field,
2387                                         __u32 len, void *swabber)
2388 {
2389         req_capsule_set_size(pill, field, RCL_SERVER, len);
2390         return __req_capsule_get(pill, field, RCL_SERVER, swabber, false);
2391 }
2392 EXPORT_SYMBOL(req_capsule_server_sized_swab_get);
2393
2394 /**
2395  * Returns the buffer of a \a pill corresponding to the given \a field from the
2396  * request (if the caller is executing on the server-side) or reply (if the
2397  * caller is executing on the client-side).
2398  *
2399  * This function convienient for use is code that could be executed on the
2400  * client and server alike.
2401  */
2402 const void *req_capsule_other_get(struct req_capsule *pill,
2403                                   const struct req_msg_field *field)
2404 {
2405         return __req_capsule_get(pill, field, pill->rc_loc ^ 1, NULL, false);
2406 }
2407 EXPORT_SYMBOL(req_capsule_other_get);
2408
2409 /**
2410  * Set the size of the PTLRPC request/reply (\a loc) buffer for the given \a
2411  * field of the given \a pill.
2412  *
2413  * This function must be used when constructing variable sized fields of a
2414  * request or reply.
2415  */
2416 void req_capsule_set_size(struct req_capsule *pill,
2417                           const struct req_msg_field *field,
2418                           enum req_location loc, __u32 size)
2419 {
2420         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2421
2422         if ((size != (__u32)field->rmf_size) &&
2423             (field->rmf_size != -1) &&
2424             !(field->rmf_flags & RMF_F_NO_SIZE_CHECK) &&
2425             (size > 0)) {
2426                 __u32 rmf_size = (__u32)field->rmf_size;
2427                 if ((field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2428                     (size % rmf_size != 0)) {
2429                         CERROR("%s: array field size mismatch "
2430                                 "%u %% %u != 0 (%d)\n",
2431                                 field->rmf_name, size, rmf_size, loc);
2432                         LBUG();
2433                 } else if (!(field->rmf_flags & RMF_F_STRUCT_ARRAY) &&
2434                            size < rmf_size) {
2435                         CERROR("%s: field size mismatch %u != %u (%d)\n",
2436                                 field->rmf_name, size, rmf_size, loc);
2437                         LBUG();
2438                 }
2439         }
2440
2441         pill->rc_area[loc][__req_capsule_offset(pill, field, loc)] = size;
2442 }
2443 EXPORT_SYMBOL(req_capsule_set_size);
2444
2445 /**
2446  * Return the actual PTLRPC buffer length of a request or reply (\a loc)
2447  * for the given \a pill's given \a field.
2448  *
2449  * NB: this function doesn't correspond with req_capsule_set_size(), which
2450  * actually sets the size in pill.rc_area[loc][offset], but this function
2451  * returns the message buflen[offset], maybe we should use another name.
2452  */
2453 __u32 req_capsule_get_size(const struct req_capsule *pill,
2454                          const struct req_msg_field *field,
2455                          enum req_location loc)
2456 {
2457         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2458
2459         return lustre_msg_buflen(__req_msg(pill, loc),
2460                                  __req_capsule_offset(pill, field, loc));
2461 }
2462 EXPORT_SYMBOL(req_capsule_get_size);
2463
2464 /**
2465  * Wrapper around lustre_msg_size() that returns the PTLRPC size needed for the
2466  * given \a pill's request or reply (\a loc) given the field size recorded in
2467  * the \a pill's rc_area.
2468  *
2469  * See also req_capsule_set_size().
2470  */
2471 __u32 req_capsule_msg_size(struct req_capsule *pill, enum req_location loc)
2472 {
2473         if (req_capsule_ptlreq(pill)) {
2474                 return lustre_msg_size(pill->rc_req->rq_import->imp_msg_magic,
2475                                        pill->rc_fmt->rf_fields[loc].nr,
2476                                        pill->rc_area[loc]);
2477         } else { /* SUB request in a batch request */
2478                 int count;
2479
2480                 count = req_capsule_filled_sizes(pill, loc);
2481                 return lustre_msg_size_v2(count, pill->rc_area[loc]);
2482         }
2483 }
2484 EXPORT_SYMBOL(req_capsule_msg_size);
2485
2486 /**
2487  * While req_capsule_msg_size() computes the size of a PTLRPC request or reply
2488  * (\a loc) given a \a pill's \a rc_area, this function computes the size of a
2489  * PTLRPC request or reply given only an RQF (\a fmt).
2490  *
2491  * This function should not be used for formats which contain variable size
2492  * fields.
2493  */
2494 __u32 req_capsule_fmt_size(__u32 magic, const struct req_format *fmt,
2495                          enum req_location loc)
2496 {
2497         __u32 size;
2498         size_t i = 0;
2499
2500         /*
2501          * This function should probably LASSERT() that fmt has no fields with
2502          * RMF_F_STRUCT_ARRAY in rmf_flags, since we can't know here how many
2503          * elements in the array there will ultimately be, but then, we could
2504          * assume that there will be at least one element, and that's just what
2505          * we do.
2506          */
2507         size = lustre_msg_hdr_size(magic, fmt->rf_fields[loc].nr);
2508         if (size == 0)
2509                 return size;
2510
2511         for (; i < fmt->rf_fields[loc].nr; ++i)
2512                 if (fmt->rf_fields[loc].d[i]->rmf_size != -1)
2513                         size += cfs_size_round(fmt->rf_fields[loc].d[i]->
2514                                                rmf_size);
2515         return size;
2516 }
2517 EXPORT_SYMBOL(req_capsule_fmt_size);
2518
2519 /**
2520  * Changes the format of an RPC.
2521  *
2522  * The pill must already have been initialized, which means that it already has
2523  * a request format.  The new format \a fmt must be an extension of the pill's
2524  * old format.  Specifically: the new format must have as many request and reply
2525  * fields as the old one, and all fields shared by the old and new format must
2526  * be at least as large in the new format.
2527  *
2528  * The new format's fields may be of different "type" than the old format, but
2529  * only for fields that are "opaque" blobs: fields which have a) have no
2530  * \a rmf_swabber, b) \a rmf_flags == 0 or RMF_F_NO_SIZE_CHECK, and c) \a
2531  * rmf_size == -1 or \a rmf_flags == RMF_F_NO_SIZE_CHECK.  For example,
2532  * OBD_SET_INFO has a key field and an opaque value field that gets interpreted
2533  * according to the key field.  When the value, according to the key, contains a
2534  * structure (or array thereof) to be swabbed, the format should be changed to
2535  * one where the value field has \a rmf_size/rmf_flags/rmf_swabber set
2536  * accordingly.
2537  */
2538 void req_capsule_extend(struct req_capsule *pill, const struct req_format *fmt)
2539 {
2540         int i;
2541         size_t j;
2542
2543         const struct req_format *old;
2544
2545         LASSERT(pill->rc_fmt != NULL);
2546         LASSERT(__req_format_is_sane(fmt));
2547
2548         old = pill->rc_fmt;
2549         /*
2550          * Sanity checking...
2551          */
2552         for (i = 0; i < RCL_NR; ++i) {
2553                 LASSERT(fmt->rf_fields[i].nr >= old->rf_fields[i].nr);
2554                 for (j = 0; j < old->rf_fields[i].nr - 1; ++j) {
2555                         const struct req_msg_field *ofield = FMT_FIELD(old, i, j);
2556
2557                         /* "opaque" fields can be transmogrified */
2558                         if (ofield->rmf_swabber == NULL &&
2559                             (ofield->rmf_flags & ~RMF_F_NO_SIZE_CHECK) == 0 &&
2560                             (ofield->rmf_size == -1 ||
2561                             ofield->rmf_flags == RMF_F_NO_SIZE_CHECK))
2562                                 continue;
2563                         LASSERT(FMT_FIELD(fmt, i, j) == FMT_FIELD(old, i, j));
2564                 }
2565                 /*
2566                  * Last field in old format can be shorter than in new.
2567                  */
2568                 LASSERT(FMT_FIELD(fmt, i, j)->rmf_size >=
2569                         FMT_FIELD(old, i, j)->rmf_size);
2570         }
2571
2572         pill->rc_fmt = fmt;
2573 }
2574 EXPORT_SYMBOL(req_capsule_extend);
2575
2576 /**
2577  * This function returns a non-zero value if the given \a field is present in
2578  * the format (\a rc_fmt) of \a pill's PTLRPC request or reply (\a loc), else it
2579  * returns 0.
2580  */
2581 int req_capsule_has_field(const struct req_capsule *pill,
2582                           const struct req_msg_field *field,
2583                           enum req_location loc)
2584 {
2585         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2586
2587         return field->rmf_offset[pill->rc_fmt->rf_idx][loc];
2588 }
2589 EXPORT_SYMBOL(req_capsule_has_field);
2590
2591 /**
2592  * Returns a non-zero value if the given \a field is present in the given \a
2593  * pill's PTLRPC request or reply (\a loc), else it returns 0.
2594  */
2595 int req_capsule_field_present(const struct req_capsule *pill,
2596                               const struct req_msg_field *field,
2597                               enum req_location loc)
2598 {
2599         __u32 offset;
2600
2601         LASSERT(loc == RCL_SERVER || loc == RCL_CLIENT);
2602         LASSERT(req_capsule_has_field(pill, field, loc));
2603
2604         offset = __req_capsule_offset(pill, field, loc);
2605         return lustre_msg_bufcount(__req_msg(pill, loc)) > offset;
2606 }
2607 EXPORT_SYMBOL(req_capsule_field_present);
2608
2609 /**
2610  * This function shrinks the size of the _buffer_ of the \a pill's PTLRPC
2611  * request or reply (\a loc).
2612  *
2613  * This is not the opposite of req_capsule_extend().
2614  */
2615 void req_capsule_shrink(struct req_capsule *pill,
2616                         const struct req_msg_field *field,
2617                         __u32 newlen,
2618                         enum req_location loc)
2619 {
2620         const struct req_format *fmt;
2621         struct lustre_msg       *msg;
2622         __u32                    len;
2623         int                      offset;
2624
2625         fmt = pill->rc_fmt;
2626         LASSERT(fmt != NULL);
2627         LASSERT(__req_format_is_sane(fmt));
2628         LASSERT(req_capsule_has_field(pill, field, loc));
2629         LASSERT(req_capsule_field_present(pill, field, loc));
2630
2631         offset = __req_capsule_offset(pill, field, loc);
2632
2633         msg = __req_msg(pill, loc);
2634         len = lustre_msg_buflen(msg, offset);
2635         LASSERTF(newlen <= len, "%s:%s, oldlen=%u, newlen=%u\n",
2636                  fmt->rf_name, field->rmf_name, len, newlen);
2637
2638         len = lustre_shrink_msg(msg, offset, newlen, 1);
2639         if (loc == RCL_CLIENT) {
2640                 if (req_capsule_ptlreq(pill))
2641                         pill->rc_req->rq_reqlen = len;
2642         } else {
2643                 /* update also field size in reply lenghts arrays for possible
2644                  * reply re-pack due to req_capsule_server_grow() call.
2645                  */
2646                 req_capsule_set_size(pill, field, loc, newlen);
2647                 if (req_capsule_ptlreq(pill))
2648                         pill->rc_req->rq_replen = len;
2649         }
2650 }
2651 EXPORT_SYMBOL(req_capsule_shrink);
2652
2653 int req_capsule_server_grow(struct req_capsule *pill,
2654                             const struct req_msg_field *field,
2655                             __u32 newlen)
2656 {
2657         struct ptlrpc_reply_state *rs = pill->rc_req->rq_reply_state, *nrs;
2658         char *from, *to;
2659         int rc;
2660         __u32 offset, len;
2661
2662         LASSERT(pill->rc_fmt != NULL);
2663         LASSERT(__req_format_is_sane(pill->rc_fmt));
2664         LASSERT(req_capsule_has_field(pill, field, RCL_SERVER));
2665         LASSERT(req_capsule_field_present(pill, field, RCL_SERVER));
2666
2667         len = req_capsule_get_size(pill, field, RCL_SERVER);
2668         offset = __req_capsule_offset(pill, field, RCL_SERVER);
2669
2670         CDEBUG(D_INFO, "Reply packed: %d, allocated: %d, field len %d -> %d\n",
2671                lustre_packed_msg_size(rs->rs_msg), rs->rs_repbuf_len,
2672                                       len, newlen);
2673
2674         req_capsule_set_size(pill, field, RCL_SERVER, newlen);
2675         /**
2676          * There can be enough space in current reply buffer, make sure
2677          * that rs_repbuf is not a wrapper but real reply msg, otherwise
2678          * re-packing is still needed.
2679          */
2680         if (rs->rs_msg == rs->rs_repbuf &&
2681             rs->rs_repbuf_len >=
2682             lustre_packed_msg_size(rs->rs_msg) - len + newlen) {
2683                 pill->rc_req->rq_replen = lustre_grow_msg(rs->rs_msg, offset,
2684                                                           newlen);
2685                 return 0;
2686         }
2687
2688         /* Re-allocate replay state */
2689         pill->rc_req->rq_reply_state = NULL;
2690         rc = req_capsule_server_pack(pill);
2691         if (rc) {
2692                 /* put old values back, the caller should decide what to do */
2693                 req_capsule_set_size(pill, field, RCL_SERVER, len);
2694                 pill->rc_req->rq_reply_state = rs;
2695                 return rc;
2696         }
2697         nrs = pill->rc_req->rq_reply_state;
2698         LASSERT(lustre_packed_msg_size(nrs->rs_msg) >
2699                 lustre_packed_msg_size(rs->rs_msg));
2700
2701         /* Now we need only buffers, copy them and grow the needed one */
2702         to = lustre_msg_buf(nrs->rs_msg, 0, 0);
2703         from = lustre_msg_buf(rs->rs_msg, 0, 0);
2704         memcpy(to, from,
2705                (char *)rs->rs_msg + lustre_packed_msg_size(rs->rs_msg) - from);
2706         lustre_msg_set_buflen(nrs->rs_msg, offset, len);
2707         pill->rc_req->rq_replen = lustre_grow_msg(nrs->rs_msg, offset, newlen);
2708
2709         if (rs->rs_difficult) {
2710                 /* copy rs data */
2711                 int i;
2712
2713                 nrs->rs_difficult = 1;
2714                 nrs->rs_no_ack = rs->rs_no_ack;
2715                 nrs->rs_convert_lock = rs->rs_convert_lock;
2716                 for (i = 0; i < rs->rs_nlocks; i++) {
2717                         nrs->rs_locks[i] = rs->rs_locks[i];
2718                         nrs->rs_modes[i] = rs->rs_modes[i];
2719                         nrs->rs_nlocks++;
2720                 }
2721                 rs->rs_nlocks = 0;
2722                 rs->rs_difficult = 0;
2723                 rs->rs_no_ack = 0;
2724         }
2725         ptlrpc_rs_decref(rs);
2726         return 0;
2727 }
2728 EXPORT_SYMBOL(req_capsule_server_grow);
2729
2730 #ifdef HAVE_SERVER_SUPPORT
2731 static const struct req_msg_field *mds_update_client[] = {
2732         &RMF_PTLRPC_BODY,
2733         &RMF_OUT_UPDATE_HEADER,
2734         &RMF_OUT_UPDATE_BUF,
2735 };
2736
2737 static const struct req_msg_field *mds_update_server[] = {
2738         &RMF_PTLRPC_BODY,
2739         &RMF_OUT_UPDATE_REPLY,
2740 };
2741
2742 struct req_msg_field RMF_OUT_UPDATE = DEFINE_MSGFL("object_update", 0, -1,
2743                                 lustre_swab_object_update_request, NULL);
2744 EXPORT_SYMBOL(RMF_OUT_UPDATE);
2745
2746 struct req_msg_field RMF_OUT_UPDATE_REPLY =
2747                         DEFINE_MSGFL("object_update_reply", 0, -1,
2748                                     lustre_swab_object_update_reply, NULL);
2749 EXPORT_SYMBOL(RMF_OUT_UPDATE_REPLY);
2750
2751 struct req_msg_field RMF_OUT_UPDATE_HEADER = DEFINE_MSGF("out_update_header", 0,
2752                                 -1, lustre_swab_out_update_header, NULL);
2753 EXPORT_SYMBOL(RMF_OUT_UPDATE_HEADER);
2754
2755 struct req_msg_field RMF_OUT_UPDATE_BUF = DEFINE_MSGF("update_buf",
2756                         RMF_F_STRUCT_ARRAY, sizeof(struct out_update_buffer),
2757                         lustre_swab_out_update_buffer, NULL);
2758 EXPORT_SYMBOL(RMF_OUT_UPDATE_BUF);
2759
2760 struct req_format RQF_OUT_UPDATE =
2761         DEFINE_REQ_FMT0("OUT_UPDATE", mds_update_client,
2762                         mds_update_server);
2763 EXPORT_SYMBOL(RQF_OUT_UPDATE);
2764
2765 int req_check_sepol(struct req_capsule *pill)
2766 {
2767         int rc = 0;
2768         struct obd_export *export;
2769         struct lu_nodemap *nm = NULL;
2770         const char *sepol = NULL;
2771         const char *nm_sepol = NULL;
2772
2773         if (req_capsule_subreq(pill))
2774                 return 0;
2775
2776         if (!pill->rc_req)
2777                 return -EPROTO;
2778
2779         export = pill->rc_req->rq_export;
2780         if (!export || !exp_connect_sepol(export) ||
2781             !req_capsule_has_field(pill, &RMF_SELINUX_POL, RCL_CLIENT))
2782                 goto nm;
2783
2784         if (req_capsule_get_size(pill, &RMF_SELINUX_POL, RCL_CLIENT) == 0)
2785                 goto nm;
2786
2787         sepol = req_capsule_client_get(pill, &RMF_SELINUX_POL);
2788         CDEBUG(D_SEC, "retrieved sepol %s\n", sepol);
2789
2790 nm:
2791         if (export) {
2792                 nm = nodemap_get_from_exp(export);
2793                 if (!IS_ERR_OR_NULL(nm)) {
2794                         nm_sepol = nodemap_get_sepol(nm);
2795                         if (nm_sepol && nm_sepol[0])
2796                                 if (sepol == NULL ||
2797                                     strcmp(sepol, nm_sepol) != 0)
2798                                         rc = -EACCES;
2799                 }
2800         }
2801
2802         if (!IS_ERR_OR_NULL(nm))
2803                 nodemap_putref(nm);
2804
2805         return rc;
2806 }
2807 EXPORT_SYMBOL(req_check_sepol);
2808 #endif
2809
2810 void req_capsule_subreq_init(struct req_capsule *pill,
2811                              const struct req_format *fmt,
2812                              struct ptlrpc_request *req,
2813                              struct lustre_msg *reqmsg,
2814                              struct lustre_msg *repmsg,
2815                              enum req_location loc)
2816 {
2817         req_capsule_init(pill, req, loc);
2818         req_capsule_set(pill, fmt);
2819         pill->rc_reqmsg = reqmsg;
2820         pill->rc_repmsg = repmsg;
2821 }
2822 EXPORT_SYMBOL(req_capsule_subreq_init);
2823
2824 void req_capsule_set_replen(struct req_capsule *pill)
2825 {
2826         if (req_capsule_ptlreq(pill)) {
2827                 ptlrpc_request_set_replen(pill->rc_req);
2828         } else { /* SUB request in a batch request */
2829                 int count;
2830
2831                 count = req_capsule_filled_sizes(pill, RCL_SERVER);
2832                 pill->rc_reqmsg->lm_repsize =
2833                                 lustre_msg_size_v2(count,
2834                                                    pill->rc_area[RCL_SERVER]);
2835         }
2836 }
2837 EXPORT_SYMBOL(req_capsule_set_replen);