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