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