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, 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/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 void ucred_set_nid(struct mdt_thread_info *info, struct lu_ucred *uc)
 145 {
 146         if (info && info->mti_exp && info->mti_exp->exp_connection)
 147                 uc->uc_nid = info->mti_exp->exp_connection->c_peer.nid;
 148         else
 149                 uc->uc_nid = LNET_NID_ANY;
 150 }
 151
 152 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 153                           void *buf, bool drop_fs_cap)
 154 {
 155         struct ptlrpc_request *req = mdt_info_req(info);
 156         struct mdt_device *mdt = info->mti_mdt;
 157         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 158         struct lu_ucred *ucred = mdt_ucred(info);
 159         struct lu_nodemap *nodemap;
 160         lnet_nid_t peernid = req->rq_peer.nid;
 161         __u32 perm = 0;
 162         int setuid;
 163         int setgid;
 164         int rc = 0;
 165
 166         ENTRY;
 167
 168         LASSERT(req->rq_auth_gss);
 169         LASSERT(!req->rq_auth_usr_mdt);
 170         LASSERT(req->rq_user_desc);
 171         LASSERT(ucred != NULL);
 172
 173         ucred->uc_valid = UCRED_INVALID;
 174
 175         nodemap = nodemap_get_from_exp(info->mti_exp);
 176         if (IS_ERR(nodemap))
 177                 RETURN(PTR_ERR(nodemap));
 178
 179         pud->pud_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 180                                        NODEMAP_CLIENT_TO_FS, pud->pud_uid);
 181         pud->pud_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 182                                        NODEMAP_CLIENT_TO_FS, pud->pud_gid);
 183         pud->pud_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 184                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsuid);
 185         pud->pud_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 186                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsgid);
 187
 188         ucred->uc_o_uid = pud->pud_uid;
 189         ucred->uc_o_gid = pud->pud_gid;
 190         ucred->uc_o_fsuid = pud->pud_fsuid;
 191         ucred->uc_o_fsgid = pud->pud_fsgid;
 192
 193         if (nodemap && ucred->uc_o_uid == nodemap->nm_squash_uid) {
 194                 /* deny access before we get identity ref */
 195                 if (nodemap->nmf_deny_unknown) {
 196                         nodemap_putref(nodemap);
 197                         RETURN(-EACCES);
 198                 }
 199
 200                 ucred->uc_fsuid = nodemap->nm_squash_uid;
 201                 ucred->uc_fsgid = nodemap->nm_squash_gid;
 202                 ucred->uc_cap = 0;
 203                 ucred->uc_suppgids[0] = -1;
 204                 ucred->uc_suppgids[1] = -1;
 205         }
 206         nodemap_putref(nodemap);
 207
 208         if (type == BODY_INIT) {
 209                 struct mdt_body *body = (struct mdt_body *)buf;
 210
 211                 ucred->uc_suppgids[0] = body->mbo_suppgid;
 212                 ucred->uc_suppgids[1] = -1;
 213         }
 214
 215         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 216             req->rq_auth_uid != pud->pud_uid) {
 217                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 218                        "while client claims %u:%u/%u:%u\n",
 219                        libcfs_nid2str(peernid), req->rq_auth_uid,
 220                        pud->pud_uid, pud->pud_gid,
 221                        pud->pud_fsuid, pud->pud_fsgid);
 222                 RETURN(-EACCES);
 223         }
 224
 225         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 226                 ucred->uc_identity = NULL;
 227                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM | CFS_SETGRP_PERM;
 228         } else {
 229                 struct md_identity *identity;
 230
 231                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 232                                             pud->pud_uid);
 233                 if (IS_ERR(identity)) {
 234                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 235                                 ucred->uc_identity = NULL;
 236                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 237                                        CFS_SETGRP_PERM;
 238                         } else {
 239                                 CDEBUG(D_SEC,
 240                                        "Deny access without identity: uid %u\n",
 241                                        pud->pud_uid);
 242                                 RETURN(-EACCES);
 243                         }
 244                 } else {
 245                         ucred->uc_identity = identity;
 246                         perm = mdt_identity_get_perm(ucred->uc_identity,
 247                                                      peernid);
 248                 }
 249         }
 250
 251         /* find out the setuid/setgid attempt */
 252         setuid = (pud->pud_uid != pud->pud_fsuid);
 253         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 254                   (ucred->uc_identity &&
 255                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
 256
 257         /* check permission of setuid */
 258         if (setuid && !(perm & CFS_SETUID_PERM)) {
 259                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 260                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 261                 GOTO(out, rc = -EACCES);
 262         }
 263
 264         /* check permission of setgid */
 265         if (setgid && !(perm & CFS_SETGID_PERM)) {
 266                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 267                        "from %s\n", pud->pud_uid, pud->pud_gid,
 268                        pud->pud_fsuid, pud->pud_fsgid,
 269                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
 270                 GOTO(out, rc = -EACCES);
 271         }
 272
 273         if (perm & CFS_SETGRP_PERM) {
 274                 if (pud->pud_ngroups) {
 275                         /* setgroups for local client */
 276                         ucred->uc_ginfo = groups_alloc(pud->pud_ngroups);
 277                         if (!ucred->uc_ginfo) {
 278                                 CERROR("failed to alloc %d groups\n",
 279                                        pud->pud_ngroups);
 280                                 GOTO(out, rc = -ENOMEM);
 281                         }
 282
 283                         lustre_groups_from_list(ucred->uc_ginfo,
 284                                                 pud->pud_groups);
 285                         lustre_groups_sort(ucred->uc_ginfo);
 286                 } else {
 287                         ucred->uc_ginfo = NULL;
 288                 }
 289         } else {
 290                 ucred->uc_suppgids[0] = -1;
 291                 ucred->uc_suppgids[1] = -1;
 292                 ucred->uc_ginfo = NULL;
 293         }
 294
 295         ucred->uc_uid = pud->pud_uid;
 296         ucred->uc_gid = pud->pud_gid;
 297         ucred->uc_fsuid = pud->pud_fsuid;
 298         ucred->uc_fsgid = pud->pud_fsgid;
 299
 300         /* process root_squash here. */
 301         mdt_root_squash(info, peernid);
 302
 303         /* remove fs privilege for non-root user. */
 304         if (ucred->uc_fsuid && drop_fs_cap)
 305                 ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
 306         else
 307                 ucred->uc_cap = pud->pud_cap;
 308         ucred->uc_valid = UCRED_NEW;
 309         ucred_set_jobid(info, ucred);
 310         ucred_set_nid(info, ucred);
 311
 312         EXIT;
 313
 314 out:
 315         if (rc) {
 316                 if (ucred->uc_ginfo) {
 317                         put_group_info(ucred->uc_ginfo);
 318                         ucred->uc_ginfo = NULL;
 319                 }
 320                 if (ucred->uc_identity) {
 321                         mdt_identity_put(mdt->mdt_identity_cache,
 322                                          ucred->uc_identity);
 323                         ucred->uc_identity = NULL;
 324                 }
 325         }
 326
 327         return rc;
 328 }
 329
 330 /**
 331  * Check whether allow the client to set supplementary group IDs or not.
 332  *
 333  * \param[in] info      pointer to the thread context
 334  * \param[in] uc        pointer to the RPC user descriptor
 335  *
 336  * \retval              true if allow to set supplementary group IDs
 337  * \retval              false for other cases
 338  */
 339 bool allow_client_chgrp(struct mdt_thread_info *info, struct lu_ucred *uc)
 340 {
 341         __u32 perm;
 342
 343         /* 1. If identity_upcall is disabled,
 344          *    permit local client to do anything. */
 345         if (is_identity_get_disabled(info->mti_mdt->mdt_identity_cache))
 346                 return true;
 347
 348         /* 2. If fail to get related identities, then forbid any client to
 349          *    set supplementary group IDs. */
 350         if (uc->uc_identity == NULL)
 351                 return false;
 352
 353         /* 3. Check the permission in the identities. */
 354         perm = mdt_identity_get_perm(uc->uc_identity,
 355                                      mdt_info_req(info)->rq_peer.nid);
 356         if (perm & CFS_SETGRP_PERM)
 357                 return true;
 358
 359         return false;
 360 }
 361
 362 int mdt_check_ucred(struct mdt_thread_info *info)
 363 {
 364         struct ptlrpc_request   *req = mdt_info_req(info);
 365         struct mdt_device       *mdt = info->mti_mdt;
 366         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 367         struct lu_ucred         *ucred = mdt_ucred(info);
 368         struct md_identity      *identity = NULL;
 369         lnet_nid_t               peernid = req->rq_peer.nid;
 370         __u32                    perm = 0;
 371         int                      setuid;
 372         int                      setgid;
 373         int                      rc = 0;
 374
 375         ENTRY;
 376
 377         LASSERT(ucred != NULL);
 378         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
 379                 RETURN(0);
 380
 381         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 382                 RETURN(0);
 383
 384         /* sanity check: if we use strong authentication, we expect the
 385          * uid which client claimed is true */
 386         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 387             req->rq_auth_uid != pud->pud_uid) {
 388                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 389                        "while client claims %u:%u/%u:%u\n",
 390                        libcfs_nid2str(peernid), req->rq_auth_uid,
 391                        pud->pud_uid, pud->pud_gid,
 392                        pud->pud_fsuid, pud->pud_fsgid);
 393                 RETURN(-EACCES);
 394         }
 395
 396         if (is_identity_get_disabled(mdt->mdt_identity_cache))
 397                 RETURN(0);
 398
 399         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 400         if (IS_ERR(identity)) {
 401                 if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 402                         RETURN(0);
 403                 } else {
 404                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 405                                pud->pud_uid);
 406                         RETURN(-EACCES);
 407                 }
 408         }
 409
 410         perm = mdt_identity_get_perm(identity, peernid);
 411         /* find out the setuid/setgid attempt */
 412         setuid = (pud->pud_uid != pud->pud_fsuid);
 413         setgid = (pud->pud_gid != pud->pud_fsgid ||
 414                   pud->pud_gid != identity->mi_gid);
 415
 416         /* check permission of setuid */
 417         if (setuid && !(perm & CFS_SETUID_PERM)) {
 418                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 419                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 420                 GOTO(out, rc = -EACCES);
 421         }
 422
 423         /* check permission of setgid */
 424         if (setgid && !(perm & CFS_SETGID_PERM)) {
 425                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 426                        "from %s\n", pud->pud_uid, pud->pud_gid,
 427                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 428                        libcfs_nid2str(peernid));
 429                 GOTO(out, rc = -EACCES);
 430         }
 431
 432         EXIT;
 433
 434 out:
 435         mdt_identity_put(mdt->mdt_identity_cache, identity);
 436         return rc;
 437 }
 438
 439 static int old_init_ucred_common(struct mdt_thread_info *info,
 440                                  struct lu_nodemap *nodemap,
 441                                  bool drop_fs_cap)
 442 {
 443         struct lu_ucred         *uc = mdt_ucred(info);
 444         struct mdt_device       *mdt = info->mti_mdt;
 445         struct md_identity      *identity = NULL;
 446
 447         if (nodemap && uc->uc_o_uid == nodemap->nm_squash_uid) {
 448                 /* deny access before we get identity ref */
 449                 if (nodemap->nmf_deny_unknown)
 450                         RETURN(-EACCES);
 451
 452                 uc->uc_fsuid = nodemap->nm_squash_uid;
 453                 uc->uc_fsgid = nodemap->nm_squash_gid;
 454                 uc->uc_cap = 0;
 455                 uc->uc_suppgids[0] = -1;
 456                 uc->uc_suppgids[1] = -1;
 457         }
 458
 459         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 460                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 461                                             uc->uc_fsuid);
 462                 if (IS_ERR(identity)) {
 463                         if (unlikely(PTR_ERR(identity) == -EREMCHG ||
 464                                      uc->uc_cap & CFS_CAP_FS_MASK)) {
 465                                 identity = NULL;
 466                         } else {
 467                                 CDEBUG(D_SEC, "Deny access without identity: "
 468                                        "uid %u\n", uc->uc_fsuid);
 469                                 RETURN(-EACCES);
 470                         }
 471                 }
 472         }
 473         uc->uc_identity = identity;
 474
 475         /* process root_squash here. */
 476         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 477
 478         /* remove fs privilege for non-root user. */
 479         if (uc->uc_fsuid && drop_fs_cap)
 480                 uc->uc_cap &= ~CFS_CAP_FS_MASK;
 481         uc->uc_valid = UCRED_OLD;
 482         ucred_set_jobid(info, uc);
 483         ucred_set_nid(info, uc);
 484
 485         EXIT;
 486
 487         return 0;
 488 }
 489
 490 static int old_init_ucred(struct mdt_thread_info *info,
 491                           struct mdt_body *body, bool drop_fs_cap)
 492 {
 493         struct lu_ucred *uc = mdt_ucred(info);
 494         struct lu_nodemap *nodemap;
 495         int rc;
 496         ENTRY;
 497
 498         nodemap = nodemap_get_from_exp(info->mti_exp);
 499         if (IS_ERR(nodemap))
 500                 RETURN(PTR_ERR(nodemap));
 501
 502         body->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 503                                        NODEMAP_CLIENT_TO_FS, body->mbo_uid);
 504         body->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 505                                        NODEMAP_CLIENT_TO_FS, body->mbo_gid);
 506         body->mbo_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 507                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsuid);
 508         body->mbo_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 509                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsgid);
 510
 511         LASSERT(uc != NULL);
 512         uc->uc_valid = UCRED_INVALID;
 513         uc->uc_o_uid = uc->uc_uid = body->mbo_uid;
 514         uc->uc_o_gid = uc->uc_gid = body->mbo_gid;
 515         uc->uc_o_fsuid = uc->uc_fsuid = body->mbo_fsuid;
 516         uc->uc_o_fsgid = uc->uc_fsgid = body->mbo_fsgid;
 517         uc->uc_suppgids[0] = body->mbo_suppgid;
 518         uc->uc_suppgids[1] = -1;
 519         uc->uc_ginfo = NULL;
 520         uc->uc_cap = body->mbo_capability;
 521
 522         rc = old_init_ucred_common(info, nodemap, drop_fs_cap);
 523         nodemap_putref(nodemap);
 524
 525         RETURN(rc);
 526 }
 527
 528 static int old_init_ucred_reint(struct mdt_thread_info *info)
 529 {
 530         struct lu_ucred *uc = mdt_ucred(info);
 531         struct lu_nodemap *nodemap;
 532         int rc;
 533         ENTRY;
 534
 535         nodemap = nodemap_get_from_exp(info->mti_exp);
 536         if (IS_ERR(nodemap))
 537                 RETURN(PTR_ERR(nodemap));
 538
 539         LASSERT(uc != NULL);
 540
 541         uc->uc_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 542                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsuid);
 543         uc->uc_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 544                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsgid);
 545
 546         uc->uc_valid = UCRED_INVALID;
 547         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 548         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 549         uc->uc_ginfo = NULL;
 550
 551         rc = old_init_ucred_common(info, nodemap, true); /* drop_fs_cap=true */
 552         nodemap_putref(nodemap);
 553
 554         RETURN(rc);
 555 }
 556
 557 static inline int __mdt_init_ucred(struct mdt_thread_info *info,
 558                                    struct mdt_body *body,
 559                                    bool drop_fs_cap)
 560 {
 561         struct ptlrpc_request   *req = mdt_info_req(info);
 562         struct lu_ucred         *uc  = mdt_ucred(info);
 563
 564         LASSERT(uc != NULL);
 565         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 566                 return 0;
 567
 568         mdt_exit_ucred(info);
 569
 570         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 571                 return old_init_ucred(info, body, drop_fs_cap);
 572         else
 573                 return new_init_ucred(info, BODY_INIT, body, drop_fs_cap);
 574 }
 575
 576 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 577 {
 578         return __mdt_init_ucred(info, body, true);
 579 }
 580
 581 /* LU-6528 when "no_subtree_check" is set for NFS export, nfsd_set_fh_dentry()
 582  * doesn't set correct fsuid explicitely, but raise capability to allow
 583  * exportfs_decode_fh() to reconnect disconnected dentry into dcache. So for
 584  * lookup (i.e. intent_getattr), we should keep FS capability, otherwise it
 585  * will fail permission check. */
 586 int mdt_init_ucred_intent_getattr(struct mdt_thread_info *info,
 587                                   struct mdt_body *body)
 588 {
 589         return __mdt_init_ucred(info, body, false);
 590 }
 591
 592 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 593 {
 594         struct ptlrpc_request *req = mdt_info_req(info);
 595         struct lu_ucred       *uc  = mdt_ucred(info);
 596         struct md_attr        *ma  = &info->mti_attr;
 597
 598         LASSERT(uc != NULL);
 599         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 600                 return 0;
 601
 602         /* LU-5564: for normal close request, skip permission check */
 603         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE &&
 604             !(ma->ma_attr_flags & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP)))
 605                 uc->uc_cap |= CFS_CAP_FS_MASK;
 606
 607         mdt_exit_ucred(info);
 608
 609         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 610                 return old_init_ucred_reint(info);
 611         else
 612                 return new_init_ucred(info, REC_INIT, NULL, true);
 613 }
 614
 615 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 616 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm, __u64 valid)
 617 {
 618         const struct lov_ost_data_v1 *lod;
 619         __u32 lmm_magic = le32_to_cpu(lmm->lmm_magic);
 620         __u16 count;
 621         int i;
 622
 623         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 624                 return;
 625
 626         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 627                POSTID(&lmm->lmm_oi), lmm_magic,
 628                le32_to_cpu(lmm->lmm_pattern));
 629
 630         /* No support for compount layouts yet */
 631         if (lmm_magic != LOV_MAGIC_V1 && lmm_magic != LOV_MAGIC_V3)
 632                 return;
 633
 634         count = le16_to_cpu(((struct lov_user_md *)lmm)->lmm_stripe_count);
 635         CDEBUG(level, "stripe_size=0x%x, stripe_count=0x%x\n",
 636                le32_to_cpu(lmm->lmm_stripe_size), count);
 637
 638         /* If it's a directory or a released file, then there are
 639          * no actual objects to print, so bail out. */
 640         if (valid & OBD_MD_FLDIREA ||
 641             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 642                 return;
 643
 644         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 645         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 646                 struct ost_id oi;
 647
 648                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 649                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 650                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 651         }
 652 }
 653
 654 void mdt_dump_lmv(unsigned int level, const union lmv_mds_md *lmv)
 655 {
 656         const struct lmv_mds_md_v1 *lmm1;
 657         int                        i;
 658
 659         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 660                 return;
 661
 662         lmm1 = &lmv->lmv_md_v1;
 663         CDEBUG(level,
 664                "magic 0x%08X, master %#X stripe_count %#x hash_type %#x\n",
 665                le32_to_cpu(lmm1->lmv_magic),
 666                le32_to_cpu(lmm1->lmv_master_mdt_index),
 667                le32_to_cpu(lmm1->lmv_stripe_count),
 668                le32_to_cpu(lmm1->lmv_hash_type));
 669
 670         if (le32_to_cpu(lmm1->lmv_magic) == LMV_MAGIC_STRIPE)
 671                 return;
 672
 673         for (i = 0; i < le32_to_cpu(lmm1->lmv_stripe_count); i++) {
 674                 struct lu_fid fid;
 675
 676                 fid_le_to_cpu(&fid, &lmm1->lmv_stripe_fids[i]);
 677                 CDEBUG(level, "idx %u subobj "DFID"\n", i, PFID(&fid));
 678         }
 679 }
 680
 681 /* Shrink and/or grow reply buffers */
 682 int mdt_fix_reply(struct mdt_thread_info *info)
 683 {
 684         struct req_capsule *pill = info->mti_pill;
 685         struct mdt_body    *body;
 686         int                md_size, md_packed = 0;
 687         int                acl_size;
 688         int                rc = 0;
 689         ENTRY;
 690
 691         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 692         LASSERT(body != NULL);
 693
 694         if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE |
 695                                OBD_MD_LINKNAME))
 696                 md_size = body->mbo_eadatasize;
 697         else
 698                 md_size = 0;
 699
 700         acl_size = body->mbo_aclsize;
 701
 702         /* this replay - not send info to client */
 703         if (info->mti_spec.no_create) {
 704                 md_size = 0;
 705                 acl_size = 0;
 706         }
 707
 708         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d\n",
 709                md_size, acl_size);
 710 /*
 711             &RMF_MDT_BODY,
 712             &RMF_MDT_MD,
 713             &RMF_ACL, or &RMF_LOGCOOKIES
 714 (optional)  &RMF_CAPA1,
 715 (optional)  &RMF_CAPA2,
 716 (optional)  something else
 717 */
 718
 719         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 720          * buffers before growing it */
 721         if (info->mti_big_lmm_used) {
 722                 /* big_lmm buffer may be used even without packing the result
 723                  * into reply, just for internal server needs */
 724                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 725                         md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 726                                                          RCL_SERVER);
 727
 728                 /* free big lmm if md_size is not needed */
 729                 if (md_size == 0 || md_packed == 0) {
 730                         info->mti_big_lmm_used = 0;
 731                 } else {
 732                         /* buffer must be allocated separately */
 733                         LASSERT(info->mti_attr.ma_lmm !=
 734                                 req_capsule_server_get(pill, &RMF_MDT_MD));
 735                         req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 736                 }
 737         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 738                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 739         }
 740
 741         if (info->mti_big_acl_used) {
 742                 if (acl_size == 0)
 743                         info->mti_big_acl_used = 0;
 744                 else
 745                         req_capsule_shrink(pill, &RMF_ACL, 0, RCL_SERVER);
 746         } else if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER)) {
 747                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 748         } else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER)) {
 749                 req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
 750         }
 751
 752         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 753             !(body->mbo_valid & OBD_MD_FLMDSCAPA))
 754                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 755
 756         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 757             !(body->mbo_valid & OBD_MD_FLOSSCAPA))
 758                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 759
 760         /*
 761          * Some more field should be shrinked if needed.
 762          * This should be done by those who added fields to reply message.
 763          */
 764
 765         /* Grow MD buffer if needed finally */
 766         if (info->mti_big_lmm_used) {
 767                 void *lmm;
 768
 769                 LASSERT(md_size > md_packed);
 770                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 771                        md_size - md_packed);
 772                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 773                 if (rc) {
 774                         /* we can't answer with proper LOV EA, drop flags,
 775                          * the rc is also returned so this request is
 776                          * considered as failed */
 777                         body->mbo_valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 778                         /* don't return transno along with error */
 779                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 780                 } else {
 781                         /* now we need to pack right LOV/LMV EA */
 782                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 783                         if (info->mti_attr.ma_valid & MA_LOV) {
 784                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 785                                                              RCL_SERVER) ==
 786                                                 info->mti_attr.ma_lmm_size);
 787                                 memcpy(lmm, info->mti_attr.ma_lmm,
 788                                        info->mti_attr.ma_lmm_size);
 789                         } else if (info->mti_attr.ma_valid & MA_LMV) {
 790                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 791                                                              RCL_SERVER) ==
 792                                                 info->mti_attr.ma_lmv_size);
 793                                 memcpy(lmm, info->mti_attr.ma_lmv,
 794                                        info->mti_attr.ma_lmv_size);
 795                         }
 796                 }
 797
 798                 /* update mdt_max_mdsize so clients will be aware about that */
 799                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 800                         info->mti_mdt->mdt_max_mdsize =
 801                                                 info->mti_attr.ma_lmm_size;
 802                 info->mti_big_lmm_used = 0;
 803         }
 804
 805         if (info->mti_big_acl_used) {
 806                 CDEBUG(D_INFO, "Enlarge reply ACL buffer to %d bytes\n",
 807                        acl_size);
 808
 809                 rc = req_capsule_server_grow(pill, &RMF_ACL, acl_size);
 810                 if (rc) {
 811                         body->mbo_valid &= ~OBD_MD_FLACL;
 812                 } else {
 813                         void *acl = req_capsule_server_get(pill, &RMF_ACL);
 814
 815                         memcpy(acl, info->mti_big_acl, acl_size);
 816                 }
 817
 818                 info->mti_big_acl_used = 0;
 819         }
 820
 821         RETURN(rc);
 822 }
 823
 824
 825 /* if object is dying, pack the lov/llog data,
 826  * parameter info->mti_attr should be valid at this point!
 827  * Also implements RAoLU policy */
 828 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 829                            struct md_attr *ma)
 830 {
 831         struct mdt_body *repbody = NULL;
 832         const struct lu_attr *la = &ma->ma_attr;
 833         struct coordinator *cdt = &info->mti_mdt->mdt_coordinator;
 834         int rc;
 835         __u64 need = 0;
 836         struct hsm_action_item hai = {
 837                 .hai_len = sizeof(hai),
 838                 .hai_action = HSMA_REMOVE,
 839                 .hai_extent.length = -1,
 840                 .hai_cookie = 0,
 841                 .hai_gid = 0,
 842         };
 843         __u64 compound_id;
 844         int archive_id;
 845
 846         ENTRY;
 847
 848         if (mdt_info_req(info) != NULL) {
 849                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 850                 LASSERT(repbody != NULL);
 851         } else {
 852                 CDEBUG(D_INFO, "not running in a request/reply context\n");
 853         }
 854
 855         if ((ma->ma_valid & MA_INODE) && repbody != NULL)
 856                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 857
 858         if (ma->ma_valid & MA_LOV) {
 859                 CERROR("No need in LOV EA upon unlink\n");
 860                 dump_stack();
 861         }
 862         if (repbody != NULL)
 863                 repbody->mbo_eadatasize = 0;
 864
 865         /* Only check unlinked and archived if RAoLU and upon last close */
 866         if (!cdt->cdt_remove_archive_on_last_unlink ||
 867             atomic_read(&mo->mot_open_count) != 0)
 868                 RETURN(0);
 869
 870         /* mdt_attr_get_complex will clear ma_valid, so check here first */
 871         if ((ma->ma_valid & MA_INODE) && (ma->ma_attr.la_nlink != 0))
 872                 RETURN(0);
 873
 874         if ((ma->ma_valid & MA_HSM) && (!(ma->ma_hsm.mh_flags & HS_EXISTS)))
 875                 RETURN(0);
 876
 877         need |= (MA_INODE | MA_HSM) & ~ma->ma_valid;
 878         if (need != 0) {
 879                 /* ma->ma_valid is missing either MA_INODE, MA_HSM, or both,
 880                  * try setting them */
 881                 ma->ma_need |= need;
 882                 rc = mdt_attr_get_complex(info, mo, ma);
 883                 if (rc) {
 884                         CERROR("%s: unable to fetch missing attributes of"
 885                                DFID": rc=%d\n", mdt_obd_name(info->mti_mdt),
 886                                PFID(mdt_object_fid(mo)), rc);
 887                         RETURN(0);
 888                 }
 889
 890                 if (need & MA_INODE) {
 891                         if (ma->ma_valid & MA_INODE) {
 892                                 if (ma->ma_attr.la_nlink != 0)
 893                                         RETURN(0);
 894                         } else {
 895                                 RETURN(0);
 896                         }
 897                 }
 898
 899                 if (need & MA_HSM) {
 900                         if (ma->ma_valid & MA_HSM) {
 901                                 if (!(ma->ma_hsm.mh_flags & HS_EXISTS))
 902                                         RETURN(0);
 903                         } else {
 904                                 RETURN(0);
 905                         }
 906                 }
 907         }
 908
 909         /* RAoLU policy is active, last close on file has occured,
 910          * file is unlinked, file is archived, so create remove request
 911          * for copytool!
 912          * If CDT is not running, requests will be logged for later. */
 913         compound_id = atomic_inc_return(&cdt->cdt_compound_id);
 914         if (ma->ma_hsm.mh_arch_id != 0)
 915                 archive_id = ma->ma_hsm.mh_arch_id;
 916         else
 917                 archive_id = cdt->cdt_default_archive_id;
 918
 919         hai.hai_fid = *mdt_object_fid(mo);
 920
 921         rc = mdt_agent_record_add(info->mti_env, info->mti_mdt,
 922                                   compound_id, archive_id, 0, &hai);
 923         if (rc)
 924                 CERROR("%s: unable to add HSM remove request for "DFID
 925                        ": rc=%d\n", mdt_obd_name(info->mti_mdt),
 926                        PFID(mdt_object_fid(mo)), rc);
 927
 928         RETURN(0);
 929 }
 930
 931 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 932                                   struct md_attr *ma)
 933 {
 934         __u64 out;
 935
 936         out = 0;
 937         if (in & MDS_ATTR_MODE)
 938                 out |= LA_MODE;
 939         if (in & MDS_ATTR_UID)
 940                 out |= LA_UID;
 941         if (in & MDS_ATTR_GID)
 942                 out |= LA_GID;
 943         if (in & MDS_ATTR_SIZE)
 944                 out |= LA_SIZE;
 945         if (in & MDS_ATTR_BLOCKS)
 946                 out |= LA_BLOCKS;
 947         if (in & MDS_ATTR_ATIME_SET)
 948                 out |= LA_ATIME;
 949         if (in & MDS_ATTR_CTIME_SET)
 950                 out |= LA_CTIME;
 951         if (in & MDS_ATTR_MTIME_SET)
 952                 out |= LA_MTIME;
 953         if (in & MDS_ATTR_ATTR_FLAG)
 954                 out |= LA_FLAGS;
 955         if (in & MDS_ATTR_KILL_SUID)
 956                 out |= LA_KILL_SUID;
 957         if (in & MDS_ATTR_KILL_SGID)
 958                 out |= LA_KILL_SGID;
 959         if (in & MDS_ATTR_PROJID)
 960                 out |= LA_PROJID;
 961
 962         if (in & MDS_ATTR_FROM_OPEN)
 963                 rr->rr_flags |= MRF_OPEN_TRUNC;
 964         if (in & MDS_OPEN_OWNEROVERRIDE)
 965                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
 966         if (in & MDS_ATTR_FORCE)
 967                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 968
 969         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID | MDS_ATTR_PROJID |
 970                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
 971                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
 972                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
 973                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
 974                 MDS_ATTR_FROM_OPEN | MDS_OPEN_OWNEROVERRIDE);
 975         if (in != 0)
 976                 CERROR("Unknown attr bits: %#llx\n", in);
 977         return out;
 978 }
 979
 980 /* unpacking */
 981
 982 int mdt_name_unpack(struct req_capsule *pill,
 983                     const struct req_msg_field *field,
 984                     struct lu_name *ln,
 985                     enum mdt_name_flags flags)
 986 {
 987         ln->ln_name = req_capsule_client_get(pill, field);
 988         ln->ln_namelen = req_capsule_get_size(pill, field, RCL_CLIENT) - 1;
 989
 990         if (!lu_name_is_valid(ln)) {
 991                 ln->ln_name = NULL;
 992                 ln->ln_namelen = 0;
 993
 994                 return -EPROTO;
 995         }
 996
 997         if ((flags & MNF_FIX_ANON) &&
 998             ln->ln_namelen == 1 && ln->ln_name[0] == '/') {
 999                 /* Newer (3.x) kernels use a name of "/" for the
1000                  * "anonymous" disconnected dentries from NFS
1001                  * filehandle conversion. See d_obtain_alias(). */
1002                 ln->ln_name = NULL;
1003                 ln->ln_namelen = 0;
1004         }
1005
1006         return 0;
1007 }
1008
1009 static int mdt_file_secctx_unpack(struct req_capsule *pill,
1010                                   const char **secctx_name,
1011                                   void **secctx, size_t *secctx_size)
1012 {
1013         const char *name;
1014         size_t name_size;
1015
1016         *secctx_name = NULL;
1017         *secctx = NULL;
1018         *secctx_size = 0;
1019
1020         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT) ||
1021             !req_capsule_field_present(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT))
1022                 return 0;
1023
1024         name_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
1025                                          RCL_CLIENT);
1026         if (name_size == 0)
1027                 return 0;
1028
1029         name = req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1030         if (strnlen(name, name_size) != name_size - 1)
1031                 return -EPROTO;
1032
1033         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_CLIENT) ||
1034             !req_capsule_field_present(pill, &RMF_FILE_SECCTX, RCL_CLIENT))
1035                 return -EPROTO;
1036
1037         *secctx_name = name;
1038         *secctx = req_capsule_client_get(pill, &RMF_FILE_SECCTX);
1039         *secctx_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_CLIENT);
1040
1041         return 0;
1042 }
1043
1044 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
1045 {
1046         struct lu_ucred *uc = mdt_ucred(info);
1047         struct md_attr *ma = &info->mti_attr;
1048         struct lu_attr *la = &ma->ma_attr;
1049         struct req_capsule *pill = info->mti_pill;
1050         struct mdt_reint_record *rr = &info->mti_rr;
1051         struct mdt_rec_setattr *rec;
1052         struct lu_nodemap *nodemap;
1053
1054         ENTRY;
1055
1056         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1057         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1058         if (rec == NULL)
1059                 RETURN(-EFAULT);
1060
1061         /* This prior initialization is needed for old_init_ucred_reint() */
1062         uc->uc_fsuid = rec->sa_fsuid;
1063         uc->uc_fsgid = rec->sa_fsgid;
1064         uc->uc_cap   = rec->sa_cap;
1065         uc->uc_suppgids[0] = rec->sa_suppgid;
1066         uc->uc_suppgids[1] = -1;
1067
1068         rr->rr_fid1 = &rec->sa_fid;
1069         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
1070         la->la_mode  = rec->sa_mode;
1071         la->la_flags = rec->sa_attr_flags;
1072
1073         nodemap = nodemap_get_from_exp(info->mti_exp);
1074         if (IS_ERR(nodemap))
1075                 RETURN(PTR_ERR(nodemap));
1076
1077         la->la_uid   = nodemap_map_id(nodemap, NODEMAP_UID,
1078                                       NODEMAP_CLIENT_TO_FS, rec->sa_uid);
1079         la->la_gid   = nodemap_map_id(nodemap, NODEMAP_GID,
1080                                       NODEMAP_CLIENT_TO_FS, rec->sa_gid);
1081         la->la_projid = rec->sa_projid;
1082         nodemap_putref(nodemap);
1083
1084         la->la_size  = rec->sa_size;
1085         la->la_blocks = rec->sa_blocks;
1086         la->la_ctime = rec->sa_ctime;
1087         la->la_atime = rec->sa_atime;
1088         la->la_mtime = rec->sa_mtime;
1089         ma->ma_valid = MA_INODE;
1090
1091         if (rec->sa_bias & MDS_DATA_MODIFIED)
1092                 ma->ma_attr_flags |= MDS_DATA_MODIFIED;
1093         else
1094                 ma->ma_attr_flags &= ~MDS_DATA_MODIFIED;
1095
1096         ma->ma_attr_flags &= ~MDS_CLOSE_INTENT;
1097         ma->ma_attr_flags |= rec->sa_bias & MDS_CLOSE_INTENT;
1098         RETURN(0);
1099 }
1100
1101 static int mdt_close_handle_unpack(struct mdt_thread_info *info)
1102 {
1103         struct req_capsule *pill = info->mti_pill;
1104         struct mdt_ioepoch *ioepoch;
1105         ENTRY;
1106
1107         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
1108                 ioepoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
1109         else
1110                 ioepoch = NULL;
1111
1112         if (ioepoch == NULL)
1113                 RETURN(-EPROTO);
1114
1115         info->mti_close_handle = ioepoch->mio_handle;
1116
1117         RETURN(0);
1118 }
1119
1120 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
1121         struct req_capsule      *pill = info->mti_pill;
1122
1123         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
1124                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
1125                 if (info->mti_dlm_req == NULL)
1126                         RETURN(-EFAULT);
1127         }
1128
1129         RETURN(0);
1130 }
1131
1132 static int mdt_setattr_unpack(struct mdt_thread_info *info)
1133 {
1134         struct mdt_reint_record *rr = &info->mti_rr;
1135         struct md_attr          *ma = &info->mti_attr;
1136         struct req_capsule      *pill = info->mti_pill;
1137         int rc;
1138         ENTRY;
1139
1140         rc = mdt_setattr_unpack_rec(info);
1141         if (rc)
1142                 RETURN(rc);
1143
1144         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1145                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1146                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1147                                                         RCL_CLIENT);
1148                 if (rr->rr_eadatalen > 0) {
1149                         const struct lmv_user_md        *lum;
1150
1151                         lum = rr->rr_eadata;
1152                         /* Sigh ma_valid(from req) does not indicate whether
1153                          * it will set LOV/LMV EA, so we have to check magic */
1154                         if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
1155                                 ma->ma_valid |= MA_LMV;
1156                                 ma->ma_lmv = (void *)rr->rr_eadata;
1157                                 ma->ma_lmv_size = rr->rr_eadatalen;
1158                         } else {
1159                                 ma->ma_valid |= MA_LOV;
1160                                 ma->ma_lmm = (void *)rr->rr_eadata;
1161                                 ma->ma_lmm_size = rr->rr_eadatalen;
1162                         }
1163                 }
1164         }
1165
1166         rc = mdt_dlmreq_unpack(info);
1167         RETURN(rc);
1168 }
1169
1170 static int mdt_close_intent_unpack(struct mdt_thread_info *info)
1171 {
1172         struct md_attr          *ma = &info->mti_attr;
1173         struct req_capsule      *pill = info->mti_pill;
1174         ENTRY;
1175
1176         if (!(ma->ma_attr_flags & MDS_CLOSE_INTENT))
1177                 RETURN(0);
1178
1179         req_capsule_extend(pill, &RQF_MDS_CLOSE_INTENT);
1180
1181         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
1182             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
1183                 RETURN(-EFAULT);
1184
1185         RETURN(0);
1186 }
1187
1188 int mdt_close_unpack(struct mdt_thread_info *info)
1189 {
1190         int rc;
1191         ENTRY;
1192
1193         rc = mdt_close_handle_unpack(info);
1194         if (rc)
1195                 RETURN(rc);
1196
1197         rc = mdt_setattr_unpack_rec(info);
1198         if (rc)
1199                 RETURN(rc);
1200
1201         rc = mdt_close_intent_unpack(info);
1202         if (rc)
1203                 RETURN(rc);
1204
1205         RETURN(mdt_init_ucred_reint(info));
1206 }
1207
1208 static int mdt_create_unpack(struct mdt_thread_info *info)
1209 {
1210         struct lu_ucred *uc  = mdt_ucred(info);
1211         struct mdt_rec_create *rec;
1212         struct lu_attr *attr = &info->mti_attr.ma_attr;
1213         struct mdt_reint_record *rr = &info->mti_rr;
1214         struct req_capsule *pill = info->mti_pill;
1215         struct md_op_spec *sp = &info->mti_spec;
1216         int rc;
1217
1218         ENTRY;
1219
1220         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1221         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1222         if (rec == NULL)
1223                 RETURN(-EFAULT);
1224
1225         /* This prior initialization is needed for old_init_ucred_reint() */
1226         uc->uc_fsuid = rec->cr_fsuid;
1227         uc->uc_fsgid = rec->cr_fsgid;
1228         uc->uc_cap   = rec->cr_cap;
1229         uc->uc_suppgids[0] = rec->cr_suppgid1;
1230         uc->uc_suppgids[1] = -1;
1231         uc->uc_umask = rec->cr_umask;
1232
1233         rr->rr_fid1 = &rec->cr_fid1;
1234         rr->rr_fid2 = &rec->cr_fid2;
1235         attr->la_mode = rec->cr_mode;
1236         attr->la_rdev  = rec->cr_rdev;
1237         attr->la_uid   = rec->cr_fsuid;
1238         attr->la_gid   = rec->cr_fsgid;
1239         attr->la_ctime = rec->cr_time;
1240         attr->la_mtime = rec->cr_time;
1241         attr->la_atime = rec->cr_time;
1242         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
1243                          LA_CTIME | LA_MTIME | LA_ATIME;
1244         memset(&sp->u, 0, sizeof(sp->u));
1245         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1246
1247         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1248         if (rc < 0)
1249                 RETURN(rc);
1250
1251         if (S_ISLNK(attr->la_mode)) {
1252                 const char *tgt = NULL;
1253
1254                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1255                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
1256                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1257                         sp->u.sp_symname = tgt;
1258                 }
1259                 if (tgt == NULL)
1260                         RETURN(-EFAULT);
1261         } else {
1262                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_ACL);
1263                 if (S_ISDIR(attr->la_mode) &&
1264                     req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
1265                         sp->u.sp_ea.eadata =
1266                                 req_capsule_client_get(pill, &RMF_EADATA);
1267                         sp->u.sp_ea.eadatalen =
1268                                 req_capsule_get_size(pill, &RMF_EADATA,
1269                                                      RCL_CLIENT);
1270                         sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
1271                 }
1272         }
1273
1274         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1275                                     &sp->sp_cr_file_secctx,
1276                                     &sp->sp_cr_file_secctx_size);
1277         if (rc < 0)
1278                 RETURN(rc);
1279
1280         rc = mdt_dlmreq_unpack(info);
1281         RETURN(rc);
1282 }
1283
1284 static int mdt_link_unpack(struct mdt_thread_info *info)
1285 {
1286         struct lu_ucred *uc  = mdt_ucred(info);
1287         struct mdt_rec_link *rec;
1288         struct lu_attr *attr = &info->mti_attr.ma_attr;
1289         struct mdt_reint_record *rr = &info->mti_rr;
1290         struct req_capsule *pill = info->mti_pill;
1291         int rc;
1292
1293         ENTRY;
1294
1295         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1296         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1297         if (rec == NULL)
1298                 RETURN(-EFAULT);
1299
1300         /* This prior initialization is needed for old_init_ucred_reint() */
1301         uc->uc_fsuid = rec->lk_fsuid;
1302         uc->uc_fsgid = rec->lk_fsgid;
1303         uc->uc_cap   = rec->lk_cap;
1304         uc->uc_suppgids[0] = rec->lk_suppgid1;
1305         uc->uc_suppgids[1] = rec->lk_suppgid2;
1306
1307         attr->la_uid = rec->lk_fsuid;
1308         attr->la_gid = rec->lk_fsgid;
1309         rr->rr_fid1 = &rec->lk_fid1;
1310         rr->rr_fid2 = &rec->lk_fid2;
1311         attr->la_ctime = rec->lk_time;
1312         attr->la_mtime = rec->lk_time;
1313         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1314
1315         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1316         if (rc < 0)
1317                 RETURN(rc);
1318
1319         rc = mdt_dlmreq_unpack(info);
1320
1321         RETURN(rc);
1322 }
1323
1324 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1325 {
1326         struct lu_ucred *uc  = mdt_ucred(info);
1327         struct mdt_rec_unlink *rec;
1328         struct md_attr *ma = &info->mti_attr;
1329         struct lu_attr *attr = &info->mti_attr.ma_attr;
1330         struct mdt_reint_record *rr = &info->mti_rr;
1331         struct req_capsule *pill = info->mti_pill;
1332         int rc;
1333
1334         ENTRY;
1335
1336         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1337         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1338         if (rec == NULL)
1339                 RETURN(-EFAULT);
1340
1341         /* This prior initialization is needed for old_init_ucred_reint() */
1342         uc->uc_fsuid = rec->ul_fsuid;
1343         uc->uc_fsgid = rec->ul_fsgid;
1344         uc->uc_cap   = rec->ul_cap;
1345         uc->uc_suppgids[0] = rec->ul_suppgid1;
1346         uc->uc_suppgids[1] = -1;
1347
1348         attr->la_uid = rec->ul_fsuid;
1349         attr->la_gid = rec->ul_fsgid;
1350         rr->rr_fid1 = &rec->ul_fid1;
1351         rr->rr_fid2 = &rec->ul_fid2;
1352         attr->la_ctime = rec->ul_time;
1353         attr->la_mtime = rec->ul_time;
1354         attr->la_mode  = rec->ul_mode;
1355         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1356
1357         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1358         if (rc < 0)
1359                 RETURN(rc);
1360
1361         if (rec->ul_bias & MDS_VTX_BYPASS)
1362                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1363         else
1364                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1365
1366         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1367
1368         rc = mdt_dlmreq_unpack(info);
1369         RETURN(rc);
1370 }
1371
1372 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1373 {
1374         info->mti_spec.sp_rm_entry = 1;
1375         return mdt_unlink_unpack(info);
1376 }
1377
1378 static int mdt_rename_unpack(struct mdt_thread_info *info)
1379 {
1380         struct lu_ucred *uc = mdt_ucred(info);
1381         struct mdt_rec_rename *rec;
1382         struct md_attr *ma = &info->mti_attr;
1383         struct lu_attr *attr = &info->mti_attr.ma_attr;
1384         struct mdt_reint_record *rr = &info->mti_rr;
1385         struct req_capsule *pill = info->mti_pill;
1386         int rc;
1387
1388         ENTRY;
1389
1390         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1391         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1392         if (rec == NULL)
1393                 RETURN(-EFAULT);
1394
1395         /* This prior initialization is needed for old_init_ucred_reint() */
1396         uc->uc_fsuid = rec->rn_fsuid;
1397         uc->uc_fsgid = rec->rn_fsgid;
1398         uc->uc_cap   = rec->rn_cap;
1399         uc->uc_suppgids[0] = rec->rn_suppgid1;
1400         uc->uc_suppgids[1] = rec->rn_suppgid2;
1401
1402         attr->la_uid = rec->rn_fsuid;
1403         attr->la_gid = rec->rn_fsgid;
1404         rr->rr_fid1 = &rec->rn_fid1;
1405         rr->rr_fid2 = &rec->rn_fid2;
1406         attr->la_ctime = rec->rn_time;
1407         attr->la_mtime = rec->rn_time;
1408         /* rename_tgt contains the mode already */
1409         attr->la_mode = rec->rn_mode;
1410         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1411
1412         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1413         if (rc < 0)
1414                 RETURN(rc);
1415
1416         rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
1417         if (rc < 0)
1418                 RETURN(rc);
1419
1420         if (rec->rn_bias & MDS_VTX_BYPASS)
1421                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1422         else
1423                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1424
1425         if (rec->rn_bias & MDS_RENAME_MIGRATE) {
1426                 req_capsule_extend(info->mti_pill, &RQF_MDS_REINT_MIGRATE);
1427                 rc = mdt_close_handle_unpack(info);
1428                 if (rc < 0)
1429                         RETURN(rc);
1430                 info->mti_spec.sp_migrate_close = 1;
1431         }
1432
1433         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1434
1435
1436         rc = mdt_dlmreq_unpack(info);
1437
1438         RETURN(rc);
1439 }
1440
1441 /*
1442  * please see comment above LOV_MAGIC_V1_DEFINED
1443  */
1444 void mdt_fix_lov_magic(struct mdt_thread_info *info, void *eadata)
1445 {
1446         struct lov_user_md_v1   *v1 = eadata;
1447
1448         LASSERT(v1);
1449
1450         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1451                 if ((v1->lmm_magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
1452                         v1->lmm_magic |= LOV_MAGIC_DEFINED;
1453                 else if ((v1->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
1454                          __swab32(LOV_MAGIC_MAGIC))
1455                         v1->lmm_magic |= __swab32(LOV_MAGIC_DEFINED);
1456         }
1457 }
1458
1459 static int mdt_open_unpack(struct mdt_thread_info *info)
1460 {
1461         struct lu_ucred *uc = mdt_ucred(info);
1462         struct mdt_rec_create *rec;
1463         struct lu_attr *attr = &info->mti_attr.ma_attr;
1464         struct req_capsule *pill = info->mti_pill;
1465         struct mdt_reint_record *rr = &info->mti_rr;
1466         struct ptlrpc_request *req = mdt_info_req(info);
1467         struct md_op_spec *sp = &info->mti_spec;
1468         int rc;
1469         ENTRY;
1470
1471         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1472         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1473         if (rec == NULL)
1474                 RETURN(-EFAULT);
1475
1476         /* This prior initialization is needed for old_init_ucred_reint() */
1477         uc->uc_fsuid = rec->cr_fsuid;
1478         uc->uc_fsgid = rec->cr_fsgid;
1479         uc->uc_cap   = rec->cr_cap;
1480         uc->uc_suppgids[0] = rec->cr_suppgid1;
1481         uc->uc_suppgids[1] = rec->cr_suppgid2;
1482         uc->uc_umask = rec->cr_umask;
1483
1484         rr->rr_fid1   = &rec->cr_fid1;
1485         rr->rr_fid2   = &rec->cr_fid2;
1486         rr->rr_handle = &rec->cr_old_handle;
1487         attr->la_mode = rec->cr_mode;
1488         attr->la_rdev  = rec->cr_rdev;
1489         attr->la_uid   = rec->cr_fsuid;
1490         attr->la_gid   = rec->cr_fsgid;
1491         attr->la_ctime = rec->cr_time;
1492         attr->la_mtime = rec->cr_time;
1493         attr->la_atime = rec->cr_time;
1494         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1495                          LA_CTIME | LA_MTIME | LA_ATIME;
1496         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1497         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1498         /* Do not trigger ASSERTION if client miss to set such flags. */
1499         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1500                 RETURN(-EPROTO);
1501
1502         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1503
1504         mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);
1505
1506         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1507                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1508                                                         RCL_CLIENT);
1509                 if (rr->rr_eadatalen > 0) {
1510                         rr->rr_eadata = req_capsule_client_get(pill,
1511                                                                &RMF_EADATA);
1512                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1513                         sp->u.sp_ea.eadata = rr->rr_eadata;
1514                         sp->no_create = !!req_is_replay(req);
1515                         mdt_fix_lov_magic(info, rr->rr_eadata);
1516                 }
1517
1518                 /*
1519                  * Client default md_size may be 0 right after client start,
1520                  * until all osc are connected, set here just some reasonable
1521                  * value to prevent misbehavior.
1522                  */
1523                 if (rr->rr_eadatalen == 0 &&
1524                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1525                         rr->rr_eadatalen = MIN_MD_SIZE;
1526         }
1527
1528         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1529                                     &sp->sp_cr_file_secctx,
1530                                     &sp->sp_cr_file_secctx_size);
1531
1532         RETURN(rc);
1533 }
1534
1535 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1536 {
1537         struct mdt_reint_record *rr = &info->mti_rr;
1538         struct lu_ucred *uc = mdt_ucred(info);
1539         struct lu_attr *attr = &info->mti_attr.ma_attr;
1540         struct req_capsule *pill = info->mti_pill;
1541         struct mdt_rec_setxattr *rec;
1542         int rc;
1543         ENTRY;
1544
1545
1546         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1547                  sizeof(struct mdt_rec_reint));
1548
1549         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1550         if (rec == NULL)
1551                 RETURN(-EFAULT);
1552
1553         /* This prior initialization is needed for old_init_ucred_reint() */
1554         uc->uc_fsuid  = rec->sx_fsuid;
1555         uc->uc_fsgid  = rec->sx_fsgid;
1556         uc->uc_cap    = rec->sx_cap;
1557         uc->uc_suppgids[0] = rec->sx_suppgid1;
1558         uc->uc_suppgids[1] = -1;
1559
1560         rr->rr_opcode = rec->sx_opcode;
1561         rr->rr_fid1   = &rec->sx_fid;
1562         attr->la_valid = rec->sx_valid;
1563         attr->la_ctime = rec->sx_time;
1564         attr->la_size = rec->sx_size;
1565         attr->la_flags = rec->sx_flags;
1566
1567         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1568         if (rc < 0)
1569                 RETURN(rc);
1570
1571         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1572                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1573                                                         RCL_CLIENT);
1574                 if (rr->rr_eadatalen > 0) {
1575                         rr->rr_eadata = req_capsule_client_get(pill,
1576                                                                &RMF_EADATA);
1577                         if (rr->rr_eadata == NULL)
1578                                 RETURN(-EFAULT);
1579                 } else {
1580                         rr->rr_eadata = NULL;
1581                 }
1582         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1583                 CDEBUG(D_INFO, "no xattr data supplied\n");
1584                 RETURN(-EFAULT);
1585         }
1586
1587         if (mdt_dlmreq_unpack(info) < 0)
1588                 RETURN(-EPROTO);
1589
1590         RETURN(0);
1591 }
1592
1593 static int mdt_resync_unpack(struct mdt_thread_info *info)
1594 {
1595         struct req_capsule      *pill = info->mti_pill;
1596         struct mdt_reint_record *rr   = &info->mti_rr;
1597         struct lu_ucred         *uc     = mdt_ucred(info);
1598         struct mdt_rec_resync   *rec;
1599         ENTRY;
1600
1601         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1602         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1603         if (rec == NULL)
1604                 RETURN(-EFAULT);
1605
1606         /* This prior initialization is needed for old_init_ucred_reint() */
1607         uc->uc_fsuid = rec->rs_fsuid;
1608         uc->uc_fsgid = rec->rs_fsgid;
1609         uc->uc_cap   = rec->rs_cap;
1610
1611         rr->rr_fid1   = &rec->rs_fid;
1612
1613         /* cookie doesn't need to be swapped but it has been swapped
1614          * in lustre_swab_mdt_rec_reint() as rr_mtime, so here it needs
1615          * restoring. */
1616         if (ptlrpc_req_need_swab(mdt_info_req(info)))
1617                 __swab64s(&rec->rs_handle.cookie);
1618         rr->rr_handle = &rec->rs_handle;
1619
1620         RETURN(mdt_dlmreq_unpack(info));
1621 }
1622
1623 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1624
1625 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1626         [REINT_SETATTR]  = mdt_setattr_unpack,
1627         [REINT_CREATE]   = mdt_create_unpack,
1628         [REINT_LINK]     = mdt_link_unpack,
1629         [REINT_UNLINK]   = mdt_unlink_unpack,
1630         [REINT_RENAME]   = mdt_rename_unpack,
1631         [REINT_OPEN]     = mdt_open_unpack,
1632         [REINT_SETXATTR] = mdt_setxattr_unpack,
1633         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1634         [REINT_MIGRATE]  = mdt_rename_unpack,
1635         [REINT_RESYNC]   = mdt_resync_unpack,
1636 };
1637
1638 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1639 {
1640         int rc;
1641         ENTRY;
1642
1643         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1644         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1645                 info->mti_rr.rr_opcode = op;
1646                 rc = mdt_reint_unpackers[op](info);
1647         } else {
1648                 CERROR("Unexpected opcode %d\n", op);
1649                 rc = -EFAULT;
1650         }
1651         RETURN(rc);
1652 }