lustre/mdt/mdt_lib.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, 2016, 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/mdt/mdt_lib.c
  33  *
  34  * Lustre Metadata Target (mdt) request unpacking helper.
  35  *
  36  * Author: Peter Braam <braam@clusterfs.com>
  37  * Author: Andreas Dilger <adilger@clusterfs.com>
  38  * Author: Phil Schwan <phil@clusterfs.com>
  39  * Author: Mike Shaver <shaver@clusterfs.com>
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  * Author: Huang Hua <huanghua@clusterfs.com>
  42  * Author: Fan Yong <fanyong@clusterfs.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_MDS
  46
  47 #include <linux/user_namespace.h>
  48 #ifdef HAVE_UIDGID_HEADER
  49 # include <linux/uidgid.h>
  50 #endif
  51 #include "mdt_internal.h"
  52 #include <uapi/linux/lnet/nidstr.h>
  53 #include <lustre_nodemap.h>
  54
  55 typedef enum ucred_init_type {
  56         NONE_INIT       = 0,
  57         BODY_INIT       = 1,
  58         REC_INIT        = 2
  59 } ucred_init_type_t;
  60
  61 static __u64 get_mrc_cr_flags(struct mdt_rec_create *mrc)
  62 {
  63         return (__u64)(mrc->cr_flags_l) | ((__u64)mrc->cr_flags_h << 32);
  64 }
  65
  66 void mdt_exit_ucred(struct mdt_thread_info *info)
  67 {
  68         struct lu_ucred   *uc  = mdt_ucred(info);
  69         struct mdt_device *mdt = info->mti_mdt;
  70
  71         LASSERT(uc != NULL);
  72         if (uc->uc_valid != UCRED_INIT) {
  73                 uc->uc_suppgids[0] = uc->uc_suppgids[1] = -1;
  74                 if (uc->uc_ginfo) {
  75                         put_group_info(uc->uc_ginfo);
  76                         uc->uc_ginfo = NULL;
  77                 }
  78                 if (uc->uc_identity) {
  79                         mdt_identity_put(mdt->mdt_identity_cache,
  80                                          uc->uc_identity);
  81                         uc->uc_identity = NULL;
  82                 }
  83                 uc->uc_valid = UCRED_INIT;
  84         }
  85 }
  86
  87 static int match_nosquash_list(struct rw_semaphore *sem,
  88                                struct list_head *nidlist,
  89                                lnet_nid_t peernid)
  90 {
  91         int rc;
  92         ENTRY;
  93         down_read(sem);
  94         rc = cfs_match_nid(peernid, nidlist);
  95         up_read(sem);
  96         RETURN(rc);
  97 }
  98
  99 /* root_squash for inter-MDS operations */
 100 static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
 101 {
 102         struct lu_ucred *ucred = mdt_ucred(info);
 103         struct root_squash_info *squash = &info->mti_mdt->mdt_squash;
 104         ENTRY;
 105
 106         LASSERT(ucred != NULL);
 107         if (!squash->rsi_uid || ucred->uc_fsuid)
 108                 RETURN(0);
 109
 110         if (match_nosquash_list(&squash->rsi_sem,
 111                                 &squash->rsi_nosquash_nids,
 112                                 peernid)) {
 113                 CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
 114                        libcfs_nid2str(peernid));
 115                 RETURN(0);
 116         }
 117
 118         CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
 119                libcfs_nid2str(peernid),
 120                ucred->uc_fsuid, ucred->uc_fsgid, ucred->uc_cap,
 121                squash->rsi_uid, squash->rsi_gid, 0);
 122
 123         ucred->uc_fsuid = squash->rsi_uid;
 124         ucred->uc_fsgid = squash->rsi_gid;
 125         ucred->uc_cap = 0;
 126         ucred->uc_suppgids[0] = -1;
 127         ucred->uc_suppgids[1] = -1;
 128
 129         RETURN(0);
 130 }
 131
 132 static void ucred_set_jobid(struct mdt_thread_info *info, struct lu_ucred *uc)
 133 {
 134         struct ptlrpc_request   *req = mdt_info_req(info);
 135         const char              *jobid = mdt_req_get_jobid(req);
 136
 137         /* set jobid if specified. */
 138         if (jobid)
 139                 strlcpy(uc->uc_jobid, jobid, sizeof(uc->uc_jobid));
 140         else
 141                 uc->uc_jobid[0] = '\0';
 142 }
 143
 144 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 145                           void *buf, bool drop_fs_cap)
 146 {
 147         struct ptlrpc_request *req = mdt_info_req(info);
 148         struct mdt_device *mdt = info->mti_mdt;
 149         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 150         struct lu_ucred *ucred = mdt_ucred(info);
 151         struct lu_nodemap *nodemap;
 152         lnet_nid_t peernid = req->rq_peer.nid;
 153         __u32 perm = 0;
 154         int setuid;
 155         int setgid;
 156         int rc = 0;
 157
 158         ENTRY;
 159
 160         LASSERT(req->rq_auth_gss);
 161         LASSERT(!req->rq_auth_usr_mdt);
 162         LASSERT(req->rq_user_desc);
 163         LASSERT(ucred != NULL);
 164
 165         ucred->uc_valid = UCRED_INVALID;
 166
 167         nodemap = nodemap_get_from_exp(info->mti_exp);
 168         if (IS_ERR(nodemap))
 169                 RETURN(PTR_ERR(nodemap));
 170
 171         pud->pud_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 172                                        NODEMAP_CLIENT_TO_FS, pud->pud_uid);
 173         pud->pud_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 174                                        NODEMAP_CLIENT_TO_FS, pud->pud_gid);
 175         pud->pud_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 176                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsuid);
 177         pud->pud_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 178                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsgid);
 179
 180         ucred->uc_o_uid = pud->pud_uid;
 181         ucred->uc_o_gid = pud->pud_gid;
 182         ucred->uc_o_fsuid = pud->pud_fsuid;
 183         ucred->uc_o_fsgid = pud->pud_fsgid;
 184
 185         if (nodemap && ucred->uc_o_uid == nodemap->nm_squash_uid) {
 186                 /* deny access before we get identity ref */
 187                 if (nodemap->nmf_deny_unknown) {
 188                         nodemap_putref(nodemap);
 189                         RETURN(-EACCES);
 190                 }
 191
 192                 ucred->uc_fsuid = nodemap->nm_squash_uid;
 193                 ucred->uc_fsgid = nodemap->nm_squash_gid;
 194                 ucred->uc_cap = 0;
 195                 ucred->uc_suppgids[0] = -1;
 196                 ucred->uc_suppgids[1] = -1;
 197         }
 198         nodemap_putref(nodemap);
 199
 200         if (type == BODY_INIT) {
 201                 struct mdt_body *body = (struct mdt_body *)buf;
 202
 203                 ucred->uc_suppgids[0] = body->mbo_suppgid;
 204                 ucred->uc_suppgids[1] = -1;
 205         }
 206
 207         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 208             req->rq_auth_uid != pud->pud_uid) {
 209                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 210                        "while client claims %u:%u/%u:%u\n",
 211                        libcfs_nid2str(peernid), req->rq_auth_uid,
 212                        pud->pud_uid, pud->pud_gid,
 213                        pud->pud_fsuid, pud->pud_fsgid);
 214                 RETURN(-EACCES);
 215         }
 216
 217         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 218                 ucred->uc_identity = NULL;
 219                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM | CFS_SETGRP_PERM;
 220         } else {
 221                 struct md_identity *identity;
 222
 223                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 224                                             pud->pud_uid);
 225                 if (IS_ERR(identity)) {
 226                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 227                                 ucred->uc_identity = NULL;
 228                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 229                                        CFS_SETGRP_PERM;
 230                         } else {
 231                                 CDEBUG(D_SEC,
 232                                        "Deny access without identity: uid %u\n",
 233                                        pud->pud_uid);
 234                                 RETURN(-EACCES);
 235                         }
 236                 } else {
 237                         ucred->uc_identity = identity;
 238                         perm = mdt_identity_get_perm(ucred->uc_identity,
 239                                                      peernid);
 240                 }
 241         }
 242
 243         /* find out the setuid/setgid attempt */
 244         setuid = (pud->pud_uid != pud->pud_fsuid);
 245         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 246                   (ucred->uc_identity &&
 247                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
 248
 249         /* check permission of setuid */
 250         if (setuid && !(perm & CFS_SETUID_PERM)) {
 251                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 252                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 253                 GOTO(out, rc = -EACCES);
 254         }
 255
 256         /* check permission of setgid */
 257         if (setgid && !(perm & CFS_SETGID_PERM)) {
 258                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 259                        "from %s\n", pud->pud_uid, pud->pud_gid,
 260                        pud->pud_fsuid, pud->pud_fsgid,
 261                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
 262                 GOTO(out, rc = -EACCES);
 263         }
 264
 265         if (perm & CFS_SETGRP_PERM) {
 266                 if (pud->pud_ngroups) {
 267                         /* setgroups for local client */
 268                         ucred->uc_ginfo = groups_alloc(pud->pud_ngroups);
 269                         if (!ucred->uc_ginfo) {
 270                                 CERROR("failed to alloc %d groups\n",
 271                                        pud->pud_ngroups);
 272                                 GOTO(out, rc = -ENOMEM);
 273                         }
 274
 275                         lustre_groups_from_list(ucred->uc_ginfo,
 276                                                 pud->pud_groups);
 277                         lustre_groups_sort(ucred->uc_ginfo);
 278                 } else {
 279                         ucred->uc_ginfo = NULL;
 280                 }
 281         } else {
 282                 ucred->uc_suppgids[0] = -1;
 283                 ucred->uc_suppgids[1] = -1;
 284                 ucred->uc_ginfo = NULL;
 285         }
 286
 287         ucred->uc_uid = pud->pud_uid;
 288         ucred->uc_gid = pud->pud_gid;
 289         ucred->uc_fsuid = pud->pud_fsuid;
 290         ucred->uc_fsgid = pud->pud_fsgid;
 291
 292         /* process root_squash here. */
 293         mdt_root_squash(info, peernid);
 294
 295         /* remove fs privilege for non-root user. */
 296         if (ucred->uc_fsuid && drop_fs_cap)
 297                 ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
 298         else
 299                 ucred->uc_cap = pud->pud_cap;
 300         ucred->uc_valid = UCRED_NEW;
 301         ucred_set_jobid(info, ucred);
 302
 303         EXIT;
 304
 305 out:
 306         if (rc) {
 307                 if (ucred->uc_ginfo) {
 308                         put_group_info(ucred->uc_ginfo);
 309                         ucred->uc_ginfo = NULL;
 310                 }
 311                 if (ucred->uc_identity) {
 312                         mdt_identity_put(mdt->mdt_identity_cache,
 313                                          ucred->uc_identity);
 314                         ucred->uc_identity = NULL;
 315                 }
 316         }
 317
 318         return rc;
 319 }
 320
 321 /**
 322  * Check whether allow the client to set supplementary group IDs or not.
 323  *
 324  * \param[in] info      pointer to the thread context
 325  * \param[in] uc        pointer to the RPC user descriptor
 326  *
 327  * \retval              true if allow to set supplementary group IDs
 328  * \retval              false for other cases
 329  */
 330 bool allow_client_chgrp(struct mdt_thread_info *info, struct lu_ucred *uc)
 331 {
 332         __u32 perm;
 333
 334         /* 1. If identity_upcall is disabled,
 335          *    permit local client to do anything. */
 336         if (is_identity_get_disabled(info->mti_mdt->mdt_identity_cache))
 337                 return true;
 338
 339         /* 2. If fail to get related identities, then forbid any client to
 340          *    set supplementary group IDs. */
 341         if (uc->uc_identity == NULL)
 342                 return false;
 343
 344         /* 3. Check the permission in the identities. */
 345         perm = mdt_identity_get_perm(uc->uc_identity,
 346                                      mdt_info_req(info)->rq_peer.nid);
 347         if (perm & CFS_SETGRP_PERM)
 348                 return true;
 349
 350         return false;
 351 }
 352
 353 int mdt_check_ucred(struct mdt_thread_info *info)
 354 {
 355         struct ptlrpc_request   *req = mdt_info_req(info);
 356         struct mdt_device       *mdt = info->mti_mdt;
 357         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 358         struct lu_ucred         *ucred = mdt_ucred(info);
 359         struct md_identity      *identity = NULL;
 360         lnet_nid_t               peernid = req->rq_peer.nid;
 361         __u32                    perm = 0;
 362         int                      setuid;
 363         int                      setgid;
 364         int                      rc = 0;
 365
 366         ENTRY;
 367
 368         LASSERT(ucred != NULL);
 369         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
 370                 RETURN(0);
 371
 372         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 373                 RETURN(0);
 374
 375         /* sanity check: if we use strong authentication, we expect the
 376          * uid which client claimed is true */
 377         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 378             req->rq_auth_uid != pud->pud_uid) {
 379                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 380                        "while client claims %u:%u/%u:%u\n",
 381                        libcfs_nid2str(peernid), req->rq_auth_uid,
 382                        pud->pud_uid, pud->pud_gid,
 383                        pud->pud_fsuid, pud->pud_fsgid);
 384                 RETURN(-EACCES);
 385         }
 386
 387         if (is_identity_get_disabled(mdt->mdt_identity_cache))
 388                 RETURN(0);
 389
 390         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 391         if (IS_ERR(identity)) {
 392                 if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 393                         RETURN(0);
 394                 } else {
 395                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 396                                pud->pud_uid);
 397                         RETURN(-EACCES);
 398                 }
 399         }
 400
 401         perm = mdt_identity_get_perm(identity, peernid);
 402         /* find out the setuid/setgid attempt */
 403         setuid = (pud->pud_uid != pud->pud_fsuid);
 404         setgid = (pud->pud_gid != pud->pud_fsgid ||
 405                   pud->pud_gid != identity->mi_gid);
 406
 407         /* check permission of setuid */
 408         if (setuid && !(perm & CFS_SETUID_PERM)) {
 409                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 410                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 411                 GOTO(out, rc = -EACCES);
 412         }
 413
 414         /* check permission of setgid */
 415         if (setgid && !(perm & CFS_SETGID_PERM)) {
 416                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 417                        "from %s\n", pud->pud_uid, pud->pud_gid,
 418                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 419                        libcfs_nid2str(peernid));
 420                 GOTO(out, rc = -EACCES);
 421         }
 422
 423         EXIT;
 424
 425 out:
 426         mdt_identity_put(mdt->mdt_identity_cache, identity);
 427         return rc;
 428 }
 429
 430 static int old_init_ucred_common(struct mdt_thread_info *info,
 431                                  struct lu_nodemap *nodemap,
 432                                  bool drop_fs_cap)
 433 {
 434         struct lu_ucred         *uc = mdt_ucred(info);
 435         struct mdt_device       *mdt = info->mti_mdt;
 436         struct md_identity      *identity = NULL;
 437
 438         if (nodemap && uc->uc_o_uid == nodemap->nm_squash_uid) {
 439                 /* deny access before we get identity ref */
 440                 if (nodemap->nmf_deny_unknown)
 441                         RETURN(-EACCES);
 442
 443                 uc->uc_fsuid = nodemap->nm_squash_uid;
 444                 uc->uc_fsgid = nodemap->nm_squash_gid;
 445                 uc->uc_cap = 0;
 446                 uc->uc_suppgids[0] = -1;
 447                 uc->uc_suppgids[1] = -1;
 448         }
 449
 450         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 451                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 452                                             uc->uc_fsuid);
 453                 if (IS_ERR(identity)) {
 454                         if (unlikely(PTR_ERR(identity) == -EREMCHG ||
 455                                      uc->uc_cap & CFS_CAP_FS_MASK)) {
 456                                 identity = NULL;
 457                         } else {
 458                                 CDEBUG(D_SEC, "Deny access without identity: "
 459                                        "uid %u\n", uc->uc_fsuid);
 460                                 RETURN(-EACCES);
 461                         }
 462                 }
 463         }
 464         uc->uc_identity = identity;
 465
 466         /* process root_squash here. */
 467         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 468
 469         /* remove fs privilege for non-root user. */
 470         if (uc->uc_fsuid && drop_fs_cap)
 471                 uc->uc_cap &= ~CFS_CAP_FS_MASK;
 472         uc->uc_valid = UCRED_OLD;
 473         ucred_set_jobid(info, uc);
 474
 475         EXIT;
 476
 477         return 0;
 478 }
 479
 480 static int old_init_ucred(struct mdt_thread_info *info,
 481                           struct mdt_body *body, bool drop_fs_cap)
 482 {
 483         struct lu_ucred *uc = mdt_ucred(info);
 484         struct lu_nodemap *nodemap;
 485         int rc;
 486         ENTRY;
 487
 488         nodemap = nodemap_get_from_exp(info->mti_exp);
 489         if (IS_ERR(nodemap))
 490                 RETURN(PTR_ERR(nodemap));
 491
 492         body->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 493                                        NODEMAP_CLIENT_TO_FS, body->mbo_uid);
 494         body->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 495                                        NODEMAP_CLIENT_TO_FS, body->mbo_gid);
 496         body->mbo_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 497                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsuid);
 498         body->mbo_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 499                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsgid);
 500
 501         LASSERT(uc != NULL);
 502         uc->uc_valid = UCRED_INVALID;
 503         uc->uc_o_uid = uc->uc_uid = body->mbo_uid;
 504         uc->uc_o_gid = uc->uc_gid = body->mbo_gid;
 505         uc->uc_o_fsuid = uc->uc_fsuid = body->mbo_fsuid;
 506         uc->uc_o_fsgid = uc->uc_fsgid = body->mbo_fsgid;
 507         uc->uc_suppgids[0] = body->mbo_suppgid;
 508         uc->uc_suppgids[1] = -1;
 509         uc->uc_ginfo = NULL;
 510         uc->uc_cap = body->mbo_capability;
 511
 512         rc = old_init_ucred_common(info, nodemap, drop_fs_cap);
 513         nodemap_putref(nodemap);
 514
 515         RETURN(rc);
 516 }
 517
 518 static int old_init_ucred_reint(struct mdt_thread_info *info)
 519 {
 520         struct lu_ucred *uc = mdt_ucred(info);
 521         struct lu_nodemap *nodemap;
 522         int rc;
 523         ENTRY;
 524
 525         nodemap = nodemap_get_from_exp(info->mti_exp);
 526         if (IS_ERR(nodemap))
 527                 RETURN(PTR_ERR(nodemap));
 528
 529         LASSERT(uc != NULL);
 530
 531         uc->uc_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 532                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsuid);
 533         uc->uc_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 534                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsgid);
 535
 536         uc->uc_valid = UCRED_INVALID;
 537         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 538         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 539         uc->uc_ginfo = NULL;
 540
 541         rc = old_init_ucred_common(info, nodemap, true); /* drop_fs_cap=true */
 542         nodemap_putref(nodemap);
 543
 544         RETURN(rc);
 545 }
 546
 547 static inline int __mdt_init_ucred(struct mdt_thread_info *info,
 548                                    struct mdt_body *body,
 549                                    bool drop_fs_cap)
 550 {
 551         struct ptlrpc_request   *req = mdt_info_req(info);
 552         struct lu_ucred         *uc  = mdt_ucred(info);
 553
 554         LASSERT(uc != NULL);
 555         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 556                 return 0;
 557
 558         mdt_exit_ucred(info);
 559
 560         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 561                 return old_init_ucred(info, body, drop_fs_cap);
 562         else
 563                 return new_init_ucred(info, BODY_INIT, body, drop_fs_cap);
 564 }
 565
 566 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 567 {
 568         return __mdt_init_ucred(info, body, true);
 569 }
 570
 571 /* LU-6528 when "no_subtree_check" is set for NFS export, nfsd_set_fh_dentry()
 572  * doesn't set correct fsuid explicitely, but raise capability to allow
 573  * exportfs_decode_fh() to reconnect disconnected dentry into dcache. So for
 574  * lookup (i.e. intent_getattr), we should keep FS capability, otherwise it
 575  * will fail permission check. */
 576 int mdt_init_ucred_intent_getattr(struct mdt_thread_info *info,
 577                                   struct mdt_body *body)
 578 {
 579         return __mdt_init_ucred(info, body, false);
 580 }
 581
 582 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 583 {
 584         struct ptlrpc_request *req = mdt_info_req(info);
 585         struct lu_ucred       *uc  = mdt_ucred(info);
 586         struct md_attr        *ma  = &info->mti_attr;
 587
 588         LASSERT(uc != NULL);
 589         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 590                 return 0;
 591
 592         /* LU-5564: for normal close request, skip permission check */
 593         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE &&
 594             !(ma->ma_attr_flags & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP)))
 595                 uc->uc_cap |= CFS_CAP_FS_MASK;
 596
 597         mdt_exit_ucred(info);
 598
 599         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 600                 return old_init_ucred_reint(info);
 601         else
 602                 return new_init_ucred(info, REC_INIT, NULL, true);
 603 }
 604
 605 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 606 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm, __u64 valid)
 607 {
 608         const struct lov_ost_data_v1 *lod;
 609         __u32 lmm_magic = le32_to_cpu(lmm->lmm_magic);
 610         __u16 count;
 611         int i;
 612
 613         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 614                 return;
 615
 616         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 617                POSTID(&lmm->lmm_oi), lmm_magic,
 618                le32_to_cpu(lmm->lmm_pattern));
 619
 620         /* No support for compount layouts yet */
 621         if (lmm_magic != LOV_MAGIC_V1 && lmm_magic != LOV_MAGIC_V3)
 622                 return;
 623
 624         count = le16_to_cpu(((struct lov_user_md *)lmm)->lmm_stripe_count);
 625         CDEBUG(level, "stripe_size=0x%x, stripe_count=0x%x\n",
 626                le32_to_cpu(lmm->lmm_stripe_size), count);
 627
 628         /* If it's a directory or a released file, then there are
 629          * no actual objects to print, so bail out. */
 630         if (valid & OBD_MD_FLDIREA ||
 631             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 632                 return;
 633
 634         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 635         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 636                 struct ost_id oi;
 637
 638                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 639                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 640                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 641         }
 642 }
 643
 644 void mdt_dump_lmv(unsigned int level, const union lmv_mds_md *lmv)
 645 {
 646         const struct lmv_mds_md_v1 *lmm1;
 647         int                        i;
 648
 649         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 650                 return;
 651
 652         lmm1 = &lmv->lmv_md_v1;
 653         CDEBUG(level,
 654                "magic 0x%08X, master %#X stripe_count %#x hash_type %#x\n",
 655                le32_to_cpu(lmm1->lmv_magic),
 656                le32_to_cpu(lmm1->lmv_master_mdt_index),
 657                le32_to_cpu(lmm1->lmv_stripe_count),
 658                le32_to_cpu(lmm1->lmv_hash_type));
 659
 660         if (le32_to_cpu(lmm1->lmv_magic) == LMV_MAGIC_STRIPE)
 661                 return;
 662
 663         for (i = 0; i < le32_to_cpu(lmm1->lmv_stripe_count); i++) {
 664                 struct lu_fid fid;
 665
 666                 fid_le_to_cpu(&fid, &lmm1->lmv_stripe_fids[i]);
 667                 CDEBUG(level, "idx %u subobj "DFID"\n", i, PFID(&fid));
 668         }
 669 }
 670
 671 /* Shrink and/or grow reply buffers */
 672 int mdt_fix_reply(struct mdt_thread_info *info)
 673 {
 674         struct req_capsule *pill = info->mti_pill;
 675         struct mdt_body    *body;
 676         int                md_size, md_packed = 0;
 677         int                acl_size;
 678         int                rc = 0;
 679         ENTRY;
 680
 681         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 682         LASSERT(body != NULL);
 683
 684         if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE |
 685                                OBD_MD_LINKNAME))
 686                 md_size = body->mbo_eadatasize;
 687         else
 688                 md_size = 0;
 689
 690         acl_size = body->mbo_aclsize;
 691
 692         /* this replay - not send info to client */
 693         if (info->mti_spec.no_create) {
 694                 md_size = 0;
 695                 acl_size = 0;
 696         }
 697
 698         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d\n",
 699                md_size, acl_size);
 700 /*
 701             &RMF_MDT_BODY,
 702             &RMF_MDT_MD,
 703             &RMF_ACL, or &RMF_LOGCOOKIES
 704 (optional)  &RMF_CAPA1,
 705 (optional)  &RMF_CAPA2,
 706 (optional)  something else
 707 */
 708
 709         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 710          * buffers before growing it */
 711         if (info->mti_big_lmm_used) {
 712                 /* big_lmm buffer may be used even without packing the result
 713                  * into reply, just for internal server needs */
 714                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 715                         md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 716                                                          RCL_SERVER);
 717
 718                 /* free big lmm if md_size is not needed */
 719                 if (md_size == 0 || md_packed == 0) {
 720                         info->mti_big_lmm_used = 0;
 721                 } else {
 722                         /* buffer must be allocated separately */
 723                         LASSERT(info->mti_attr.ma_lmm !=
 724                                 req_capsule_server_get(pill, &RMF_MDT_MD));
 725                         req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 726                 }
 727         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 728                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 729         }
 730
 731         if (info->mti_big_acl_used) {
 732                 if (acl_size == 0)
 733                         info->mti_big_acl_used = 0;
 734                 else
 735                         req_capsule_shrink(pill, &RMF_ACL, 0, RCL_SERVER);
 736         } else if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER)) {
 737                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 738         } else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER)) {
 739                 req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
 740         }
 741
 742         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 743             !(body->mbo_valid & OBD_MD_FLMDSCAPA))
 744                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 745
 746         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 747             !(body->mbo_valid & OBD_MD_FLOSSCAPA))
 748                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 749
 750         /*
 751          * Some more field should be shrinked if needed.
 752          * This should be done by those who added fields to reply message.
 753          */
 754
 755         /* Grow MD buffer if needed finally */
 756         if (info->mti_big_lmm_used) {
 757                 void *lmm;
 758
 759                 LASSERT(md_size > md_packed);
 760                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 761                        md_size - md_packed);
 762                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 763                 if (rc) {
 764                         /* we can't answer with proper LOV EA, drop flags,
 765                          * the rc is also returned so this request is
 766                          * considered as failed */
 767                         body->mbo_valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 768                         /* don't return transno along with error */
 769                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 770                 } else {
 771                         /* now we need to pack right LOV/LMV EA */
 772                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 773                         if (info->mti_attr.ma_valid & MA_LOV) {
 774                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 775                                                              RCL_SERVER) ==
 776                                                 info->mti_attr.ma_lmm_size);
 777                                 memcpy(lmm, info->mti_attr.ma_lmm,
 778                                        info->mti_attr.ma_lmm_size);
 779                         } else if (info->mti_attr.ma_valid & MA_LMV) {
 780                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 781                                                              RCL_SERVER) ==
 782                                                 info->mti_attr.ma_lmv_size);
 783                                 memcpy(lmm, info->mti_attr.ma_lmv,
 784                                        info->mti_attr.ma_lmv_size);
 785                         }
 786                 }
 787
 788                 /* update mdt_max_mdsize so clients will be aware about that */
 789                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 790                         info->mti_mdt->mdt_max_mdsize =
 791                                                 info->mti_attr.ma_lmm_size;
 792                 info->mti_big_lmm_used = 0;
 793         }
 794
 795         if (info->mti_big_acl_used) {
 796                 CDEBUG(D_INFO, "Enlarge reply ACL buffer to %d bytes\n",
 797                        acl_size);
 798
 799                 rc = req_capsule_server_grow(pill, &RMF_ACL, acl_size);
 800                 if (rc) {
 801                         body->mbo_valid &= ~OBD_MD_FLACL;
 802                 } else {
 803                         void *acl = req_capsule_server_get(pill, &RMF_ACL);
 804
 805                         memcpy(acl, info->mti_big_acl, acl_size);
 806                 }
 807
 808                 info->mti_big_acl_used = 0;
 809         }
 810
 811         RETURN(rc);
 812 }
 813
 814
 815 /* if object is dying, pack the lov/llog data,
 816  * parameter info->mti_attr should be valid at this point!
 817  * Also implements RAoLU policy */
 818 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 819                            struct md_attr *ma)
 820 {
 821         struct mdt_body *repbody = NULL;
 822         const struct lu_attr *la = &ma->ma_attr;
 823         struct coordinator *cdt = &info->mti_mdt->mdt_coordinator;
 824         int rc;
 825         __u64 need = 0;
 826         struct hsm_action_item hai = {
 827                 .hai_len = sizeof(hai),
 828                 .hai_action = HSMA_REMOVE,
 829                 .hai_extent.length = -1,
 830                 .hai_cookie = 0,
 831                 .hai_gid = 0,
 832         };
 833         __u64 compound_id;
 834         int archive_id;
 835
 836         ENTRY;
 837
 838         if (mdt_info_req(info) != NULL) {
 839                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 840                 LASSERT(repbody != NULL);
 841         } else {
 842                 CDEBUG(D_INFO, "not running in a request/reply context\n");
 843         }
 844
 845         if ((ma->ma_valid & MA_INODE) && repbody != NULL)
 846                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 847
 848         if (ma->ma_valid & MA_LOV) {
 849                 CERROR("No need in LOV EA upon unlink\n");
 850                 dump_stack();
 851         }
 852         if (repbody != NULL)
 853                 repbody->mbo_eadatasize = 0;
 854
 855         /* Only check unlinked and archived if RAoLU and upon last close */
 856         if (!cdt->cdt_remove_archive_on_last_unlink ||
 857             atomic_read(&mo->mot_open_count) != 0)
 858                 RETURN(0);
 859
 860         /* mdt_attr_get_complex will clear ma_valid, so check here first */
 861         if ((ma->ma_valid & MA_INODE) && (ma->ma_attr.la_nlink != 0))
 862                 RETURN(0);
 863
 864         if ((ma->ma_valid & MA_HSM) && (!(ma->ma_hsm.mh_flags & HS_EXISTS)))
 865                 RETURN(0);
 866
 867         need |= (MA_INODE | MA_HSM) & ~ma->ma_valid;
 868         if (need != 0) {
 869                 /* ma->ma_valid is missing either MA_INODE, MA_HSM, or both,
 870                  * try setting them */
 871                 ma->ma_need |= need;
 872                 rc = mdt_attr_get_complex(info, mo, ma);
 873                 if (rc) {
 874                         CERROR("%s: unable to fetch missing attributes of"
 875                                DFID": rc=%d\n", mdt_obd_name(info->mti_mdt),
 876                                PFID(mdt_object_fid(mo)), rc);
 877                         RETURN(0);
 878                 }
 879
 880                 if (need & MA_INODE) {
 881                         if (ma->ma_valid & MA_INODE) {
 882                                 if (ma->ma_attr.la_nlink != 0)
 883                                         RETURN(0);
 884                         } else {
 885                                 RETURN(0);
 886                         }
 887                 }
 888
 889                 if (need & MA_HSM) {
 890                         if (ma->ma_valid & MA_HSM) {
 891                                 if (!(ma->ma_hsm.mh_flags & HS_EXISTS))
 892                                         RETURN(0);
 893                         } else {
 894                                 RETURN(0);
 895                         }
 896                 }
 897         }
 898
 899         /* RAoLU policy is active, last close on file has occured,
 900          * file is unlinked, file is archived, so create remove request
 901          * for copytool!
 902          * If CDT is not running, requests will be logged for later. */
 903         compound_id = atomic_inc_return(&cdt->cdt_compound_id);
 904         if (ma->ma_hsm.mh_arch_id != 0)
 905                 archive_id = ma->ma_hsm.mh_arch_id;
 906         else
 907                 archive_id = cdt->cdt_default_archive_id;
 908
 909         hai.hai_fid = *mdt_object_fid(mo);
 910
 911         rc = mdt_agent_record_add(info->mti_env, info->mti_mdt,
 912                                   compound_id, archive_id, 0, &hai);
 913         if (rc)
 914                 CERROR("%s: unable to add HSM remove request for "DFID
 915                        ": rc=%d\n", mdt_obd_name(info->mti_mdt),
 916                        PFID(mdt_object_fid(mo)), rc);
 917
 918         RETURN(0);
 919 }
 920
 921 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 922                                   struct md_attr *ma)
 923 {
 924         __u64 out;
 925
 926         out = 0;
 927         if (in & MDS_ATTR_MODE)
 928                 out |= LA_MODE;
 929         if (in & MDS_ATTR_UID)
 930                 out |= LA_UID;
 931         if (in & MDS_ATTR_GID)
 932                 out |= LA_GID;
 933         if (in & MDS_ATTR_SIZE)
 934                 out |= LA_SIZE;
 935         if (in & MDS_ATTR_BLOCKS)
 936                 out |= LA_BLOCKS;
 937         if (in & MDS_ATTR_ATIME_SET)
 938                 out |= LA_ATIME;
 939         if (in & MDS_ATTR_CTIME_SET)
 940                 out |= LA_CTIME;
 941         if (in & MDS_ATTR_MTIME_SET)
 942                 out |= LA_MTIME;
 943         if (in & MDS_ATTR_ATTR_FLAG)
 944                 out |= LA_FLAGS;
 945         if (in & MDS_ATTR_KILL_SUID)
 946                 out |= LA_KILL_SUID;
 947         if (in & MDS_ATTR_KILL_SGID)
 948                 out |= LA_KILL_SGID;
 949         if (in & MDS_ATTR_PROJID)
 950                 out |= LA_PROJID;
 951
 952         if (in & MDS_ATTR_FROM_OPEN)
 953                 rr->rr_flags |= MRF_OPEN_TRUNC;
 954         if (in & MDS_OPEN_OWNEROVERRIDE)
 955                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
 956         if (in & MDS_ATTR_FORCE)
 957                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 958
 959         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID | MDS_ATTR_PROJID |
 960                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
 961                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
 962                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
 963                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
 964                 MDS_ATTR_FROM_OPEN | MDS_OPEN_OWNEROVERRIDE);
 965         if (in != 0)
 966                 CERROR("Unknown attr bits: %#llx\n", in);
 967         return out;
 968 }
 969
 970 /* unpacking */
 971
 972 int mdt_name_unpack(struct req_capsule *pill,
 973                     const struct req_msg_field *field,
 974                     struct lu_name *ln,
 975                     enum mdt_name_flags flags)
 976 {
 977         ln->ln_name = req_capsule_client_get(pill, field);
 978         ln->ln_namelen = req_capsule_get_size(pill, field, RCL_CLIENT) - 1;
 979
 980         if (!lu_name_is_valid(ln)) {
 981                 ln->ln_name = NULL;
 982                 ln->ln_namelen = 0;
 983
 984                 return -EPROTO;
 985         }
 986
 987         if ((flags & MNF_FIX_ANON) &&
 988             ln->ln_namelen == 1 && ln->ln_name[0] == '/') {
 989                 /* Newer (3.x) kernels use a name of "/" for the
 990                  * "anonymous" disconnected dentries from NFS
 991                  * filehandle conversion. See d_obtain_alias(). */
 992                 ln->ln_name = NULL;
 993                 ln->ln_namelen = 0;
 994         }
 995
 996         return 0;
 997 }
 998
 999 static int mdt_file_secctx_unpack(struct req_capsule *pill,
1000                                   const char **secctx_name,
1001                                   void **secctx, size_t *secctx_size)
1002 {
1003         const char *name;
1004         size_t name_size;
1005
1006         *secctx_name = NULL;
1007         *secctx = NULL;
1008         *secctx_size = 0;
1009
1010         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT) ||
1011             !req_capsule_field_present(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT))
1012                 return 0;
1013
1014         name_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
1015                                          RCL_CLIENT);
1016         if (name_size == 0)
1017                 return 0;
1018
1019         name = req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1020         if (strnlen(name, name_size) != name_size - 1)
1021                 return -EPROTO;
1022
1023         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_CLIENT) ||
1024             !req_capsule_field_present(pill, &RMF_FILE_SECCTX, RCL_CLIENT))
1025                 return -EPROTO;
1026
1027         *secctx_name = name;
1028         *secctx = req_capsule_client_get(pill, &RMF_FILE_SECCTX);
1029         *secctx_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_CLIENT);
1030
1031         return 0;
1032 }
1033
1034 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
1035 {
1036         struct lu_ucred *uc = mdt_ucred(info);
1037         struct md_attr *ma = &info->mti_attr;
1038         struct lu_attr *la = &ma->ma_attr;
1039         struct req_capsule *pill = info->mti_pill;
1040         struct mdt_reint_record *rr = &info->mti_rr;
1041         struct mdt_rec_setattr *rec;
1042         struct lu_nodemap *nodemap;
1043
1044         ENTRY;
1045
1046         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1047         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1048         if (rec == NULL)
1049                 RETURN(-EFAULT);
1050
1051         /* This prior initialization is needed for old_init_ucred_reint() */
1052         uc->uc_fsuid = rec->sa_fsuid;
1053         uc->uc_fsgid = rec->sa_fsgid;
1054         uc->uc_cap   = rec->sa_cap;
1055         uc->uc_suppgids[0] = rec->sa_suppgid;
1056         uc->uc_suppgids[1] = -1;
1057
1058         rr->rr_fid1 = &rec->sa_fid;
1059         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
1060         la->la_mode  = rec->sa_mode;
1061         la->la_flags = rec->sa_attr_flags;
1062
1063         nodemap = nodemap_get_from_exp(info->mti_exp);
1064         if (IS_ERR(nodemap))
1065                 RETURN(PTR_ERR(nodemap));
1066
1067         la->la_uid   = nodemap_map_id(nodemap, NODEMAP_UID,
1068                                       NODEMAP_CLIENT_TO_FS, rec->sa_uid);
1069         la->la_gid   = nodemap_map_id(nodemap, NODEMAP_GID,
1070                                       NODEMAP_CLIENT_TO_FS, rec->sa_gid);
1071         la->la_projid = rec->sa_projid;
1072         nodemap_putref(nodemap);
1073
1074         la->la_size  = rec->sa_size;
1075         la->la_blocks = rec->sa_blocks;
1076         la->la_ctime = rec->sa_ctime;
1077         la->la_atime = rec->sa_atime;
1078         la->la_mtime = rec->sa_mtime;
1079         ma->ma_valid = MA_INODE;
1080
1081         if (rec->sa_bias & MDS_DATA_MODIFIED)
1082                 ma->ma_attr_flags |= MDS_DATA_MODIFIED;
1083         else
1084                 ma->ma_attr_flags &= ~MDS_DATA_MODIFIED;
1085
1086         ma->ma_attr_flags &= ~MDS_CLOSE_INTENT;
1087         ma->ma_attr_flags |= rec->sa_bias & MDS_CLOSE_INTENT;
1088         RETURN(0);
1089 }
1090
1091 static int mdt_close_handle_unpack(struct mdt_thread_info *info)
1092 {
1093         struct req_capsule *pill = info->mti_pill;
1094         struct mdt_ioepoch *ioepoch;
1095         ENTRY;
1096
1097         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
1098                 ioepoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
1099         else
1100                 ioepoch = NULL;
1101
1102         if (ioepoch == NULL)
1103                 RETURN(-EPROTO);
1104
1105         info->mti_close_handle = ioepoch->mio_handle;
1106
1107         RETURN(0);
1108 }
1109
1110 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
1111         struct req_capsule      *pill = info->mti_pill;
1112
1113         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
1114                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
1115                 if (info->mti_dlm_req == NULL)
1116                         RETURN(-EFAULT);
1117         }
1118
1119         RETURN(0);
1120 }
1121
1122 static int mdt_setattr_unpack(struct mdt_thread_info *info)
1123 {
1124         struct mdt_reint_record *rr = &info->mti_rr;
1125         struct md_attr          *ma = &info->mti_attr;
1126         struct req_capsule      *pill = info->mti_pill;
1127         int rc;
1128         ENTRY;
1129
1130         rc = mdt_setattr_unpack_rec(info);
1131         if (rc)
1132                 RETURN(rc);
1133
1134         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1135                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1136                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1137                                                         RCL_CLIENT);
1138                 if (rr->rr_eadatalen > 0) {
1139                         const struct lmv_user_md        *lum;
1140
1141                         lum = rr->rr_eadata;
1142                         /* Sigh ma_valid(from req) does not indicate whether
1143                          * it will set LOV/LMV EA, so we have to check magic */
1144                         if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
1145                                 ma->ma_valid |= MA_LMV;
1146                                 ma->ma_lmv = (void *)rr->rr_eadata;
1147                                 ma->ma_lmv_size = rr->rr_eadatalen;
1148                         } else {
1149                                 ma->ma_valid |= MA_LOV;
1150                                 ma->ma_lmm = (void *)rr->rr_eadata;
1151                                 ma->ma_lmm_size = rr->rr_eadatalen;
1152                         }
1153                 }
1154         }
1155
1156         rc = mdt_dlmreq_unpack(info);
1157         RETURN(rc);
1158 }
1159
1160 static int mdt_close_intent_unpack(struct mdt_thread_info *info)
1161 {
1162         struct md_attr          *ma = &info->mti_attr;
1163         struct req_capsule      *pill = info->mti_pill;
1164         ENTRY;
1165
1166         if (!(ma->ma_attr_flags & MDS_CLOSE_INTENT))
1167                 RETURN(0);
1168
1169         req_capsule_extend(pill, &RQF_MDS_CLOSE_INTENT);
1170
1171         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
1172             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
1173                 RETURN(-EFAULT);
1174
1175         RETURN(0);
1176 }
1177
1178 int mdt_close_unpack(struct mdt_thread_info *info)
1179 {
1180         int rc;
1181         ENTRY;
1182
1183         rc = mdt_close_handle_unpack(info);
1184         if (rc)
1185                 RETURN(rc);
1186
1187         rc = mdt_setattr_unpack_rec(info);
1188         if (rc)
1189                 RETURN(rc);
1190
1191         rc = mdt_close_intent_unpack(info);
1192         if (rc)
1193                 RETURN(rc);
1194
1195         RETURN(mdt_init_ucred_reint(info));
1196 }
1197
1198 static int mdt_create_unpack(struct mdt_thread_info *info)
1199 {
1200         struct lu_ucred *uc  = mdt_ucred(info);
1201         struct mdt_rec_create *rec;
1202         struct lu_attr *attr = &info->mti_attr.ma_attr;
1203         struct mdt_reint_record *rr = &info->mti_rr;
1204         struct req_capsule *pill = info->mti_pill;
1205         struct md_op_spec *sp = &info->mti_spec;
1206         int rc;
1207
1208         ENTRY;
1209
1210         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1211         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1212         if (rec == NULL)
1213                 RETURN(-EFAULT);
1214
1215         /* This prior initialization is needed for old_init_ucred_reint() */
1216         uc->uc_fsuid = rec->cr_fsuid;
1217         uc->uc_fsgid = rec->cr_fsgid;
1218         uc->uc_cap   = rec->cr_cap;
1219         uc->uc_suppgids[0] = rec->cr_suppgid1;
1220         uc->uc_suppgids[1] = -1;
1221         uc->uc_umask = rec->cr_umask;
1222
1223         rr->rr_fid1 = &rec->cr_fid1;
1224         rr->rr_fid2 = &rec->cr_fid2;
1225         attr->la_mode = rec->cr_mode;
1226         attr->la_rdev  = rec->cr_rdev;
1227         attr->la_uid   = rec->cr_fsuid;
1228         attr->la_gid   = rec->cr_fsgid;
1229         attr->la_ctime = rec->cr_time;
1230         attr->la_mtime = rec->cr_time;
1231         attr->la_atime = rec->cr_time;
1232         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
1233                          LA_CTIME | LA_MTIME | LA_ATIME;
1234         memset(&sp->u, 0, sizeof(sp->u));
1235         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1236
1237         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1238         if (rc < 0)
1239                 RETURN(rc);
1240
1241         if (S_ISLNK(attr->la_mode)) {
1242                 const char *tgt = NULL;
1243
1244                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1245                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
1246                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1247                         sp->u.sp_symname = tgt;
1248                 }
1249                 if (tgt == NULL)
1250                         RETURN(-EFAULT);
1251         } else {
1252                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_ACL);
1253                 if (S_ISDIR(attr->la_mode) &&
1254                     req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
1255                         sp->u.sp_ea.eadata =
1256                                 req_capsule_client_get(pill, &RMF_EADATA);
1257                         sp->u.sp_ea.eadatalen =
1258                                 req_capsule_get_size(pill, &RMF_EADATA,
1259                                                      RCL_CLIENT);
1260                         sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
1261                 }
1262         }
1263
1264         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1265                                     &sp->sp_cr_file_secctx,
1266                                     &sp->sp_cr_file_secctx_size);
1267         if (rc < 0)
1268                 RETURN(rc);
1269
1270         rc = mdt_dlmreq_unpack(info);
1271         RETURN(rc);
1272 }
1273
1274 static int mdt_link_unpack(struct mdt_thread_info *info)
1275 {
1276         struct lu_ucred *uc  = mdt_ucred(info);
1277         struct mdt_rec_link *rec;
1278         struct lu_attr *attr = &info->mti_attr.ma_attr;
1279         struct mdt_reint_record *rr = &info->mti_rr;
1280         struct req_capsule *pill = info->mti_pill;
1281         int rc;
1282
1283         ENTRY;
1284
1285         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1286         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1287         if (rec == NULL)
1288                 RETURN(-EFAULT);
1289
1290         /* This prior initialization is needed for old_init_ucred_reint() */
1291         uc->uc_fsuid = rec->lk_fsuid;
1292         uc->uc_fsgid = rec->lk_fsgid;
1293         uc->uc_cap   = rec->lk_cap;
1294         uc->uc_suppgids[0] = rec->lk_suppgid1;
1295         uc->uc_suppgids[1] = rec->lk_suppgid2;
1296
1297         attr->la_uid = rec->lk_fsuid;
1298         attr->la_gid = rec->lk_fsgid;
1299         rr->rr_fid1 = &rec->lk_fid1;
1300         rr->rr_fid2 = &rec->lk_fid2;
1301         attr->la_ctime = rec->lk_time;
1302         attr->la_mtime = rec->lk_time;
1303         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1304
1305         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1306         if (rc < 0)
1307                 RETURN(rc);
1308
1309         rc = mdt_dlmreq_unpack(info);
1310
1311         RETURN(rc);
1312 }
1313
1314 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1315 {
1316         struct lu_ucred *uc  = mdt_ucred(info);
1317         struct mdt_rec_unlink *rec;
1318         struct md_attr *ma = &info->mti_attr;
1319         struct lu_attr *attr = &info->mti_attr.ma_attr;
1320         struct mdt_reint_record *rr = &info->mti_rr;
1321         struct req_capsule *pill = info->mti_pill;
1322         int rc;
1323
1324         ENTRY;
1325
1326         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1327         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1328         if (rec == NULL)
1329                 RETURN(-EFAULT);
1330
1331         /* This prior initialization is needed for old_init_ucred_reint() */
1332         uc->uc_fsuid = rec->ul_fsuid;
1333         uc->uc_fsgid = rec->ul_fsgid;
1334         uc->uc_cap   = rec->ul_cap;
1335         uc->uc_suppgids[0] = rec->ul_suppgid1;
1336         uc->uc_suppgids[1] = -1;
1337
1338         attr->la_uid = rec->ul_fsuid;
1339         attr->la_gid = rec->ul_fsgid;
1340         rr->rr_fid1 = &rec->ul_fid1;
1341         rr->rr_fid2 = &rec->ul_fid2;
1342         attr->la_ctime = rec->ul_time;
1343         attr->la_mtime = rec->ul_time;
1344         attr->la_mode  = rec->ul_mode;
1345         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1346
1347         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1348         if (rc < 0)
1349                 RETURN(rc);
1350
1351         if (rec->ul_bias & MDS_VTX_BYPASS)
1352                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1353         else
1354                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1355
1356         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1357
1358         rc = mdt_dlmreq_unpack(info);
1359         RETURN(rc);
1360 }
1361
1362 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1363 {
1364         info->mti_spec.sp_rm_entry = 1;
1365         return mdt_unlink_unpack(info);
1366 }
1367
1368 static int mdt_rename_unpack(struct mdt_thread_info *info)
1369 {
1370         struct lu_ucred *uc = mdt_ucred(info);
1371         struct mdt_rec_rename *rec;
1372         struct md_attr *ma = &info->mti_attr;
1373         struct lu_attr *attr = &info->mti_attr.ma_attr;
1374         struct mdt_reint_record *rr = &info->mti_rr;
1375         struct req_capsule *pill = info->mti_pill;
1376         int rc;
1377
1378         ENTRY;
1379
1380         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1381         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1382         if (rec == NULL)
1383                 RETURN(-EFAULT);
1384
1385         /* This prior initialization is needed for old_init_ucred_reint() */
1386         uc->uc_fsuid = rec->rn_fsuid;
1387         uc->uc_fsgid = rec->rn_fsgid;
1388         uc->uc_cap   = rec->rn_cap;
1389         uc->uc_suppgids[0] = rec->rn_suppgid1;
1390         uc->uc_suppgids[1] = rec->rn_suppgid2;
1391
1392         attr->la_uid = rec->rn_fsuid;
1393         attr->la_gid = rec->rn_fsgid;
1394         rr->rr_fid1 = &rec->rn_fid1;
1395         rr->rr_fid2 = &rec->rn_fid2;
1396         attr->la_ctime = rec->rn_time;
1397         attr->la_mtime = rec->rn_time;
1398         /* rename_tgt contains the mode already */
1399         attr->la_mode = rec->rn_mode;
1400         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1401
1402         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1403         if (rc < 0)
1404                 RETURN(rc);
1405
1406         rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
1407         if (rc < 0)
1408                 RETURN(rc);
1409
1410         if (rec->rn_bias & MDS_VTX_BYPASS)
1411                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1412         else
1413                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1414
1415         if (rec->rn_bias & MDS_RENAME_MIGRATE) {
1416                 req_capsule_extend(info->mti_pill, &RQF_MDS_REINT_MIGRATE);
1417                 rc = mdt_close_handle_unpack(info);
1418                 if (rc < 0)
1419                         RETURN(rc);
1420                 info->mti_spec.sp_migrate_close = 1;
1421         }
1422
1423         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1424
1425
1426         rc = mdt_dlmreq_unpack(info);
1427
1428         RETURN(rc);
1429 }
1430
1431 /*
1432  * please see comment above LOV_MAGIC_V1_DEFINED
1433  */
1434 void mdt_fix_lov_magic(struct mdt_thread_info *info, void *eadata)
1435 {
1436         struct lov_user_md_v1   *v1 = eadata;
1437
1438         LASSERT(v1);
1439
1440         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1441                 if ((v1->lmm_magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
1442                         v1->lmm_magic |= LOV_MAGIC_DEFINED;
1443                 else if ((v1->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
1444                          __swab32(LOV_MAGIC_MAGIC))
1445                         v1->lmm_magic |= __swab32(LOV_MAGIC_DEFINED);
1446         }
1447 }
1448
1449 static int mdt_open_unpack(struct mdt_thread_info *info)
1450 {
1451         struct lu_ucred *uc = mdt_ucred(info);
1452         struct mdt_rec_create *rec;
1453         struct lu_attr *attr = &info->mti_attr.ma_attr;
1454         struct req_capsule *pill = info->mti_pill;
1455         struct mdt_reint_record *rr = &info->mti_rr;
1456         struct ptlrpc_request *req = mdt_info_req(info);
1457         struct md_op_spec *sp = &info->mti_spec;
1458         int rc;
1459         ENTRY;
1460
1461         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1462         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1463         if (rec == NULL)
1464                 RETURN(-EFAULT);
1465
1466         /* This prior initialization is needed for old_init_ucred_reint() */
1467         uc->uc_fsuid = rec->cr_fsuid;
1468         uc->uc_fsgid = rec->cr_fsgid;
1469         uc->uc_cap   = rec->cr_cap;
1470         uc->uc_suppgids[0] = rec->cr_suppgid1;
1471         uc->uc_suppgids[1] = rec->cr_suppgid2;
1472         uc->uc_umask = rec->cr_umask;
1473
1474         rr->rr_fid1   = &rec->cr_fid1;
1475         rr->rr_fid2   = &rec->cr_fid2;
1476         rr->rr_handle = &rec->cr_old_handle;
1477         attr->la_mode = rec->cr_mode;
1478         attr->la_rdev  = rec->cr_rdev;
1479         attr->la_uid   = rec->cr_fsuid;
1480         attr->la_gid   = rec->cr_fsgid;
1481         attr->la_ctime = rec->cr_time;
1482         attr->la_mtime = rec->cr_time;
1483         attr->la_atime = rec->cr_time;
1484         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1485                          LA_CTIME | LA_MTIME | LA_ATIME;
1486         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1487         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1488         /* Do not trigger ASSERTION if client miss to set such flags. */
1489         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1490                 RETURN(-EPROTO);
1491
1492         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1493
1494         mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);
1495
1496         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1497                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1498                                                         RCL_CLIENT);
1499                 if (rr->rr_eadatalen > 0) {
1500                         rr->rr_eadata = req_capsule_client_get(pill,
1501                                                                &RMF_EADATA);
1502                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1503                         sp->u.sp_ea.eadata = rr->rr_eadata;
1504                         sp->no_create = !!req_is_replay(req);
1505                         mdt_fix_lov_magic(info, rr->rr_eadata);
1506                 }
1507
1508                 /*
1509                  * Client default md_size may be 0 right after client start,
1510                  * until all osc are connected, set here just some reasonable
1511                  * value to prevent misbehavior.
1512                  */
1513                 if (rr->rr_eadatalen == 0 &&
1514                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1515                         rr->rr_eadatalen = MIN_MD_SIZE;
1516         }
1517
1518         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1519                                     &sp->sp_cr_file_secctx,
1520                                     &sp->sp_cr_file_secctx_size);
1521
1522         RETURN(rc);
1523 }
1524
1525 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1526 {
1527         struct mdt_reint_record *rr = &info->mti_rr;
1528         struct lu_ucred *uc = mdt_ucred(info);
1529         struct lu_attr *attr = &info->mti_attr.ma_attr;
1530         struct req_capsule *pill = info->mti_pill;
1531         struct mdt_rec_setxattr *rec;
1532         int rc;
1533         ENTRY;
1534
1535
1536         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1537                  sizeof(struct mdt_rec_reint));
1538
1539         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1540         if (rec == NULL)
1541                 RETURN(-EFAULT);
1542
1543         /* This prior initialization is needed for old_init_ucred_reint() */
1544         uc->uc_fsuid  = rec->sx_fsuid;
1545         uc->uc_fsgid  = rec->sx_fsgid;
1546         uc->uc_cap    = rec->sx_cap;
1547         uc->uc_suppgids[0] = rec->sx_suppgid1;
1548         uc->uc_suppgids[1] = -1;
1549
1550         rr->rr_opcode = rec->sx_opcode;
1551         rr->rr_fid1   = &rec->sx_fid;
1552         attr->la_valid = rec->sx_valid;
1553         attr->la_ctime = rec->sx_time;
1554         attr->la_size = rec->sx_size;
1555         attr->la_flags = rec->sx_flags;
1556
1557         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1558         if (rc < 0)
1559                 RETURN(rc);
1560
1561         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1562                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1563                                                         RCL_CLIENT);
1564                 if (rr->rr_eadatalen > 0) {
1565                         rr->rr_eadata = req_capsule_client_get(pill,
1566                                                                &RMF_EADATA);
1567                         if (rr->rr_eadata == NULL)
1568                                 RETURN(-EFAULT);
1569                 } else {
1570                         rr->rr_eadata = NULL;
1571                 }
1572         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1573                 CDEBUG(D_INFO, "no xattr data supplied\n");
1574                 RETURN(-EFAULT);
1575         }
1576
1577         if (mdt_dlmreq_unpack(info) < 0)
1578                 RETURN(-EPROTO);
1579
1580         RETURN(0);
1581 }
1582
1583 static int mdt_resync_unpack(struct mdt_thread_info *info)
1584 {
1585         struct req_capsule      *pill = info->mti_pill;
1586         struct mdt_reint_record *rr   = &info->mti_rr;
1587         struct lu_ucred         *uc     = mdt_ucred(info);
1588         struct mdt_rec_resync   *rec;
1589         ENTRY;
1590
1591         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1592         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1593         if (rec == NULL)
1594                 RETURN(-EFAULT);
1595
1596         /* This prior initialization is needed for old_init_ucred_reint() */
1597         uc->uc_fsuid = rec->rs_fsuid;
1598         uc->uc_fsgid = rec->rs_fsgid;
1599         uc->uc_cap   = rec->rs_cap;
1600
1601         rr->rr_fid1   = &rec->rs_fid;
1602
1603         /* cookie doesn't need to be swapped but it has been swapped
1604          * in lustre_swab_mdt_rec_reint() as rr_mtime, so here it needs
1605          * restoring. */
1606         if (ptlrpc_req_need_swab(mdt_info_req(info)))
1607                 __swab64s(&rec->rs_handle.cookie);
1608         rr->rr_handle = &rec->rs_handle;
1609
1610         RETURN(mdt_dlmreq_unpack(info));
1611 }
1612
1613 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1614
1615 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1616         [REINT_SETATTR]  = mdt_setattr_unpack,
1617         [REINT_CREATE]   = mdt_create_unpack,
1618         [REINT_LINK]     = mdt_link_unpack,
1619         [REINT_UNLINK]   = mdt_unlink_unpack,
1620         [REINT_RENAME]   = mdt_rename_unpack,
1621         [REINT_OPEN]     = mdt_open_unpack,
1622         [REINT_SETXATTR] = mdt_setxattr_unpack,
1623         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1624         [REINT_MIGRATE]  = mdt_rename_unpack,
1625         [REINT_RESYNC]   = mdt_resync_unpack,
1626 };
1627
1628 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1629 {
1630         int rc;
1631         ENTRY;
1632
1633         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1634         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1635                 info->mti_rr.rr_opcode = op;
1636                 rc = mdt_reint_unpackers[op](info);
1637         } else {
1638                 CERROR("Unexpected opcode %d\n", op);
1639                 rc = -EFAULT;
1640         }
1641         RETURN(rc);
1642 }