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 void ucred_set_audit_enabled(struct mdt_thread_info *info,
 153                                     struct lu_ucred *uc)
 154 {
 155         struct lu_nodemap *nodemap = NULL;
 156         bool audit = true;
 157
 158         if (info && info->mti_exp) {
 159                 nodemap = nodemap_get_from_exp(info->mti_exp);
 160                 if (nodemap && !IS_ERR(nodemap)) {
 161                         audit = nodemap->nmf_enable_audit;
 162                         nodemap_putref(nodemap);
 163                 }
 164         }
 165
 166         uc->uc_enable_audit = audit;
 167 }
 168
 169 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 170                           void *buf, bool drop_fs_cap)
 171 {
 172         struct ptlrpc_request *req = mdt_info_req(info);
 173         struct mdt_device *mdt = info->mti_mdt;
 174         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 175         struct lu_ucred *ucred = mdt_ucred(info);
 176         struct lu_nodemap *nodemap;
 177         lnet_nid_t peernid = req->rq_peer.nid;
 178         __u32 perm = 0;
 179         int setuid;
 180         int setgid;
 181         int rc = 0;
 182
 183         ENTRY;
 184
 185         LASSERT(req->rq_auth_gss);
 186         LASSERT(!req->rq_auth_usr_mdt);
 187         LASSERT(req->rq_user_desc);
 188         LASSERT(ucred != NULL);
 189
 190         ucred->uc_valid = UCRED_INVALID;
 191
 192         nodemap = nodemap_get_from_exp(info->mti_exp);
 193         if (IS_ERR(nodemap))
 194                 RETURN(PTR_ERR(nodemap));
 195
 196         pud->pud_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 197                                        NODEMAP_CLIENT_TO_FS, pud->pud_uid);
 198         pud->pud_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 199                                        NODEMAP_CLIENT_TO_FS, pud->pud_gid);
 200         pud->pud_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 201                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsuid);
 202         pud->pud_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 203                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsgid);
 204
 205         ucred->uc_o_uid = pud->pud_uid;
 206         ucred->uc_o_gid = pud->pud_gid;
 207         ucred->uc_o_fsuid = pud->pud_fsuid;
 208         ucred->uc_o_fsgid = pud->pud_fsgid;
 209
 210         if (nodemap && ucred->uc_o_uid == nodemap->nm_squash_uid) {
 211                 /* deny access before we get identity ref */
 212                 if (nodemap->nmf_deny_unknown) {
 213                         nodemap_putref(nodemap);
 214                         RETURN(-EACCES);
 215                 }
 216
 217                 ucred->uc_fsuid = nodemap->nm_squash_uid;
 218                 ucred->uc_fsgid = nodemap->nm_squash_gid;
 219                 ucred->uc_cap = 0;
 220                 ucred->uc_suppgids[0] = -1;
 221                 ucred->uc_suppgids[1] = -1;
 222         }
 223         nodemap_putref(nodemap);
 224
 225         if (type == BODY_INIT) {
 226                 struct mdt_body *body = (struct mdt_body *)buf;
 227
 228                 ucred->uc_suppgids[0] = body->mbo_suppgid;
 229                 ucred->uc_suppgids[1] = -1;
 230         }
 231
 232         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 233             req->rq_auth_uid != pud->pud_uid) {
 234                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 235                        "while client claims %u:%u/%u:%u\n",
 236                        libcfs_nid2str(peernid), req->rq_auth_uid,
 237                        pud->pud_uid, pud->pud_gid,
 238                        pud->pud_fsuid, pud->pud_fsgid);
 239                 RETURN(-EACCES);
 240         }
 241
 242         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 243                 ucred->uc_identity = NULL;
 244                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM | CFS_SETGRP_PERM;
 245         } else {
 246                 struct md_identity *identity;
 247
 248                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 249                                             pud->pud_uid);
 250                 if (IS_ERR(identity)) {
 251                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 252                                 ucred->uc_identity = NULL;
 253                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 254                                        CFS_SETGRP_PERM;
 255                         } else {
 256                                 CDEBUG(D_SEC,
 257                                        "Deny access without identity: uid %u\n",
 258                                        pud->pud_uid);
 259                                 RETURN(-EACCES);
 260                         }
 261                 } else {
 262                         ucred->uc_identity = identity;
 263                         perm = mdt_identity_get_perm(ucred->uc_identity,
 264                                                      peernid);
 265                 }
 266         }
 267
 268         /* find out the setuid/setgid attempt */
 269         setuid = (pud->pud_uid != pud->pud_fsuid);
 270         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 271                   (ucred->uc_identity &&
 272                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
 273
 274         /* check permission of setuid */
 275         if (setuid && !(perm & CFS_SETUID_PERM)) {
 276                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 277                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 278                 GOTO(out, rc = -EACCES);
 279         }
 280
 281         /* check permission of setgid */
 282         if (setgid && !(perm & CFS_SETGID_PERM)) {
 283                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 284                        "from %s\n", pud->pud_uid, pud->pud_gid,
 285                        pud->pud_fsuid, pud->pud_fsgid,
 286                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
 287                 GOTO(out, rc = -EACCES);
 288         }
 289
 290         if (perm & CFS_SETGRP_PERM) {
 291                 if (pud->pud_ngroups) {
 292                         /* setgroups for local client */
 293                         ucred->uc_ginfo = groups_alloc(pud->pud_ngroups);
 294                         if (!ucred->uc_ginfo) {
 295                                 CERROR("failed to alloc %d groups\n",
 296                                        pud->pud_ngroups);
 297                                 GOTO(out, rc = -ENOMEM);
 298                         }
 299
 300                         lustre_groups_from_list(ucred->uc_ginfo,
 301                                                 pud->pud_groups);
 302                         lustre_groups_sort(ucred->uc_ginfo);
 303                 } else {
 304                         ucred->uc_ginfo = NULL;
 305                 }
 306         } else {
 307                 ucred->uc_suppgids[0] = -1;
 308                 ucred->uc_suppgids[1] = -1;
 309                 ucred->uc_ginfo = NULL;
 310         }
 311
 312         ucred->uc_uid = pud->pud_uid;
 313         ucred->uc_gid = pud->pud_gid;
 314         ucred->uc_fsuid = pud->pud_fsuid;
 315         ucred->uc_fsgid = pud->pud_fsgid;
 316
 317         /* process root_squash here. */
 318         mdt_root_squash(info, peernid);
 319
 320         /* remove fs privilege for non-root user. */
 321         if (ucred->uc_fsuid && drop_fs_cap)
 322                 ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
 323         else
 324                 ucred->uc_cap = pud->pud_cap;
 325         ucred->uc_valid = UCRED_NEW;
 326         ucred_set_jobid(info, ucred);
 327         ucred_set_nid(info, ucred);
 328         ucred_set_audit_enabled(info, ucred);
 329
 330         EXIT;
 331
 332 out:
 333         if (rc) {
 334                 if (ucred->uc_ginfo) {
 335                         put_group_info(ucred->uc_ginfo);
 336                         ucred->uc_ginfo = NULL;
 337                 }
 338                 if (ucred->uc_identity) {
 339                         mdt_identity_put(mdt->mdt_identity_cache,
 340                                          ucred->uc_identity);
 341                         ucred->uc_identity = NULL;
 342                 }
 343         }
 344
 345         return rc;
 346 }
 347
 348 /**
 349  * Check whether allow the client to set supplementary group IDs or not.
 350  *
 351  * \param[in] info      pointer to the thread context
 352  * \param[in] uc        pointer to the RPC user descriptor
 353  *
 354  * \retval              true if allow to set supplementary group IDs
 355  * \retval              false for other cases
 356  */
 357 bool allow_client_chgrp(struct mdt_thread_info *info, struct lu_ucred *uc)
 358 {
 359         __u32 perm;
 360
 361         /* 1. If identity_upcall is disabled,
 362          *    permit local client to do anything. */
 363         if (is_identity_get_disabled(info->mti_mdt->mdt_identity_cache))
 364                 return true;
 365
 366         /* 2. If fail to get related identities, then forbid any client to
 367          *    set supplementary group IDs. */
 368         if (uc->uc_identity == NULL)
 369                 return false;
 370
 371         /* 3. Check the permission in the identities. */
 372         perm = mdt_identity_get_perm(uc->uc_identity,
 373                                      mdt_info_req(info)->rq_peer.nid);
 374         if (perm & CFS_SETGRP_PERM)
 375                 return true;
 376
 377         return false;
 378 }
 379
 380 int mdt_check_ucred(struct mdt_thread_info *info)
 381 {
 382         struct ptlrpc_request   *req = mdt_info_req(info);
 383         struct mdt_device       *mdt = info->mti_mdt;
 384         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 385         struct lu_ucred         *ucred = mdt_ucred(info);
 386         struct md_identity      *identity = NULL;
 387         lnet_nid_t               peernid = req->rq_peer.nid;
 388         __u32                    perm = 0;
 389         int                      setuid;
 390         int                      setgid;
 391         int                      rc = 0;
 392
 393         ENTRY;
 394
 395         LASSERT(ucred != NULL);
 396         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
 397                 RETURN(0);
 398
 399         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 400                 RETURN(0);
 401
 402         /* sanity check: if we use strong authentication, we expect the
 403          * uid which client claimed is true */
 404         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 405             req->rq_auth_uid != pud->pud_uid) {
 406                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 407                        "while client claims %u:%u/%u:%u\n",
 408                        libcfs_nid2str(peernid), req->rq_auth_uid,
 409                        pud->pud_uid, pud->pud_gid,
 410                        pud->pud_fsuid, pud->pud_fsgid);
 411                 RETURN(-EACCES);
 412         }
 413
 414         if (is_identity_get_disabled(mdt->mdt_identity_cache))
 415                 RETURN(0);
 416
 417         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 418         if (IS_ERR(identity)) {
 419                 if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 420                         RETURN(0);
 421                 } else {
 422                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 423                                pud->pud_uid);
 424                         RETURN(-EACCES);
 425                 }
 426         }
 427
 428         perm = mdt_identity_get_perm(identity, peernid);
 429         /* find out the setuid/setgid attempt */
 430         setuid = (pud->pud_uid != pud->pud_fsuid);
 431         setgid = (pud->pud_gid != pud->pud_fsgid ||
 432                   pud->pud_gid != identity->mi_gid);
 433
 434         /* check permission of setuid */
 435         if (setuid && !(perm & CFS_SETUID_PERM)) {
 436                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 437                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 438                 GOTO(out, rc = -EACCES);
 439         }
 440
 441         /* check permission of setgid */
 442         if (setgid && !(perm & CFS_SETGID_PERM)) {
 443                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 444                        "from %s\n", pud->pud_uid, pud->pud_gid,
 445                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 446                        libcfs_nid2str(peernid));
 447                 GOTO(out, rc = -EACCES);
 448         }
 449
 450         EXIT;
 451
 452 out:
 453         mdt_identity_put(mdt->mdt_identity_cache, identity);
 454         return rc;
 455 }
 456
 457 static int old_init_ucred_common(struct mdt_thread_info *info,
 458                                  struct lu_nodemap *nodemap,
 459                                  bool drop_fs_cap)
 460 {
 461         struct lu_ucred         *uc = mdt_ucred(info);
 462         struct mdt_device       *mdt = info->mti_mdt;
 463         struct md_identity      *identity = NULL;
 464
 465         if (nodemap && uc->uc_o_uid == nodemap->nm_squash_uid) {
 466                 /* deny access before we get identity ref */
 467                 if (nodemap->nmf_deny_unknown)
 468                         RETURN(-EACCES);
 469
 470                 uc->uc_fsuid = nodemap->nm_squash_uid;
 471                 uc->uc_fsgid = nodemap->nm_squash_gid;
 472                 uc->uc_cap = 0;
 473                 uc->uc_suppgids[0] = -1;
 474                 uc->uc_suppgids[1] = -1;
 475         }
 476
 477         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 478                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 479                                             uc->uc_fsuid);
 480                 if (IS_ERR(identity)) {
 481                         if (unlikely(PTR_ERR(identity) == -EREMCHG ||
 482                                      uc->uc_cap & CFS_CAP_FS_MASK)) {
 483                                 identity = NULL;
 484                         } else {
 485                                 CDEBUG(D_SEC, "Deny access without identity: "
 486                                        "uid %u\n", uc->uc_fsuid);
 487                                 RETURN(-EACCES);
 488                         }
 489                 }
 490         }
 491         uc->uc_identity = identity;
 492
 493         /* process root_squash here. */
 494         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 495
 496         /* remove fs privilege for non-root user. */
 497         if (uc->uc_fsuid && drop_fs_cap)
 498                 uc->uc_cap &= ~CFS_CAP_FS_MASK;
 499         uc->uc_valid = UCRED_OLD;
 500         ucred_set_jobid(info, uc);
 501         ucred_set_nid(info, uc);
 502         ucred_set_audit_enabled(info, uc);
 503
 504         EXIT;
 505
 506         return 0;
 507 }
 508
 509 static int old_init_ucred(struct mdt_thread_info *info,
 510                           struct mdt_body *body, bool drop_fs_cap)
 511 {
 512         struct lu_ucred *uc = mdt_ucred(info);
 513         struct lu_nodemap *nodemap;
 514         int rc;
 515         ENTRY;
 516
 517         nodemap = nodemap_get_from_exp(info->mti_exp);
 518         if (IS_ERR(nodemap))
 519                 RETURN(PTR_ERR(nodemap));
 520
 521         body->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 522                                        NODEMAP_CLIENT_TO_FS, body->mbo_uid);
 523         body->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 524                                        NODEMAP_CLIENT_TO_FS, body->mbo_gid);
 525         body->mbo_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 526                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsuid);
 527         body->mbo_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 528                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsgid);
 529
 530         LASSERT(uc != NULL);
 531         uc->uc_valid = UCRED_INVALID;
 532         uc->uc_o_uid = uc->uc_uid = body->mbo_uid;
 533         uc->uc_o_gid = uc->uc_gid = body->mbo_gid;
 534         uc->uc_o_fsuid = uc->uc_fsuid = body->mbo_fsuid;
 535         uc->uc_o_fsgid = uc->uc_fsgid = body->mbo_fsgid;
 536         uc->uc_suppgids[0] = body->mbo_suppgid;
 537         uc->uc_suppgids[1] = -1;
 538         uc->uc_ginfo = NULL;
 539         uc->uc_cap = body->mbo_capability;
 540
 541         rc = old_init_ucred_common(info, nodemap, drop_fs_cap);
 542         nodemap_putref(nodemap);
 543
 544         RETURN(rc);
 545 }
 546
 547 static int old_init_ucred_reint(struct mdt_thread_info *info)
 548 {
 549         struct lu_ucred *uc = mdt_ucred(info);
 550         struct lu_nodemap *nodemap;
 551         int rc;
 552         ENTRY;
 553
 554         nodemap = nodemap_get_from_exp(info->mti_exp);
 555         if (IS_ERR(nodemap))
 556                 RETURN(PTR_ERR(nodemap));
 557
 558         LASSERT(uc != NULL);
 559
 560         uc->uc_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 561                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsuid);
 562         uc->uc_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 563                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsgid);
 564
 565         uc->uc_valid = UCRED_INVALID;
 566         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 567         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 568         uc->uc_ginfo = NULL;
 569
 570         rc = old_init_ucred_common(info, nodemap, true); /* drop_fs_cap=true */
 571         nodemap_putref(nodemap);
 572
 573         RETURN(rc);
 574 }
 575
 576 static inline int __mdt_init_ucred(struct mdt_thread_info *info,
 577                                    struct mdt_body *body,
 578                                    bool drop_fs_cap)
 579 {
 580         struct ptlrpc_request   *req = mdt_info_req(info);
 581         struct lu_ucred         *uc  = mdt_ucred(info);
 582
 583         LASSERT(uc != NULL);
 584         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 585                 return 0;
 586
 587         mdt_exit_ucred(info);
 588
 589         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 590                 return old_init_ucred(info, body, drop_fs_cap);
 591         else
 592                 return new_init_ucred(info, BODY_INIT, body, drop_fs_cap);
 593 }
 594
 595 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 596 {
 597         return __mdt_init_ucred(info, body, true);
 598 }
 599
 600 /* LU-6528 when "no_subtree_check" is set for NFS export, nfsd_set_fh_dentry()
 601  * doesn't set correct fsuid explicitely, but raise capability to allow
 602  * exportfs_decode_fh() to reconnect disconnected dentry into dcache. So for
 603  * lookup (i.e. intent_getattr), we should keep FS capability, otherwise it
 604  * will fail permission check. */
 605 int mdt_init_ucred_intent_getattr(struct mdt_thread_info *info,
 606                                   struct mdt_body *body)
 607 {
 608         return __mdt_init_ucred(info, body, false);
 609 }
 610
 611 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 612 {
 613         struct ptlrpc_request *req = mdt_info_req(info);
 614         struct lu_ucred       *uc  = mdt_ucred(info);
 615         struct md_attr        *ma  = &info->mti_attr;
 616
 617         LASSERT(uc != NULL);
 618         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 619                 return 0;
 620
 621         /* LU-5564: for normal close request, skip permission check */
 622         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE &&
 623             !(ma->ma_attr_flags & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP)))
 624                 uc->uc_cap |= CFS_CAP_FS_MASK;
 625
 626         mdt_exit_ucred(info);
 627
 628         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 629                 return old_init_ucred_reint(info);
 630         else
 631                 return new_init_ucred(info, REC_INIT, NULL, true);
 632 }
 633
 634 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 635 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm, __u64 valid)
 636 {
 637         const struct lov_ost_data_v1 *lod;
 638         __u32 lmm_magic = le32_to_cpu(lmm->lmm_magic);
 639         __u16 count;
 640         int i;
 641
 642         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 643                 return;
 644
 645         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 646                POSTID(&lmm->lmm_oi), lmm_magic,
 647                le32_to_cpu(lmm->lmm_pattern));
 648
 649         /* No support for compount layouts yet */
 650         if (lmm_magic != LOV_MAGIC_V1 && lmm_magic != LOV_MAGIC_V3)
 651                 return;
 652
 653         count = le16_to_cpu(((struct lov_user_md *)lmm)->lmm_stripe_count);
 654         CDEBUG(level, "stripe_size=0x%x, stripe_count=0x%x\n",
 655                le32_to_cpu(lmm->lmm_stripe_size), count);
 656
 657         /* If it's a directory or a released file, then there are
 658          * no actual objects to print, so bail out. */
 659         if (valid & OBD_MD_FLDIREA ||
 660             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 661                 return;
 662
 663         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 664         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 665                 struct ost_id oi;
 666
 667                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 668                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 669                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 670         }
 671 }
 672
 673 void mdt_dump_lmv(unsigned int level, const union lmv_mds_md *lmv)
 674 {
 675         const struct lmv_mds_md_v1 *lmm1;
 676         int                        i;
 677
 678         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 679                 return;
 680
 681         lmm1 = &lmv->lmv_md_v1;
 682         CDEBUG(level,
 683                "magic 0x%08X, master %#X stripe_count %#x hash_type %#x\n",
 684                le32_to_cpu(lmm1->lmv_magic),
 685                le32_to_cpu(lmm1->lmv_master_mdt_index),
 686                le32_to_cpu(lmm1->lmv_stripe_count),
 687                le32_to_cpu(lmm1->lmv_hash_type));
 688
 689         if (le32_to_cpu(lmm1->lmv_magic) == LMV_MAGIC_STRIPE)
 690                 return;
 691
 692         for (i = 0; i < le32_to_cpu(lmm1->lmv_stripe_count); i++) {
 693                 struct lu_fid fid;
 694
 695                 fid_le_to_cpu(&fid, &lmm1->lmv_stripe_fids[i]);
 696                 CDEBUG(level, "idx %u subobj "DFID"\n", i, PFID(&fid));
 697         }
 698 }
 699
 700 /* Shrink and/or grow reply buffers */
 701 int mdt_fix_reply(struct mdt_thread_info *info)
 702 {
 703         struct req_capsule *pill = info->mti_pill;
 704         struct mdt_body    *body;
 705         int                md_size, md_packed = 0;
 706         int                acl_size;
 707         int                rc = 0;
 708         ENTRY;
 709
 710         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 711         LASSERT(body != NULL);
 712
 713         if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE |
 714                                OBD_MD_LINKNAME))
 715                 md_size = body->mbo_eadatasize;
 716         else
 717                 md_size = 0;
 718
 719         acl_size = body->mbo_aclsize;
 720
 721         /* this replay - not send info to client */
 722         if (info->mti_spec.no_create) {
 723                 md_size = 0;
 724                 acl_size = 0;
 725         }
 726
 727         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d\n",
 728                md_size, acl_size);
 729 /*
 730             &RMF_MDT_BODY,
 731             &RMF_MDT_MD,
 732             &RMF_ACL, or &RMF_LOGCOOKIES
 733 (optional)  &RMF_CAPA1,
 734 (optional)  &RMF_CAPA2,
 735 (optional)  something else
 736 */
 737
 738         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 739          * buffers before growing it */
 740         if (info->mti_big_lmm_used) {
 741                 /* big_lmm buffer may be used even without packing the result
 742                  * into reply, just for internal server needs */
 743                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 744                         md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 745                                                          RCL_SERVER);
 746
 747                 /* free big lmm if md_size is not needed */
 748                 if (md_size == 0 || md_packed == 0) {
 749                         info->mti_big_lmm_used = 0;
 750                 } else {
 751                         /* buffer must be allocated separately */
 752                         LASSERT(info->mti_attr.ma_lmm !=
 753                                 req_capsule_server_get(pill, &RMF_MDT_MD));
 754                         req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 755                 }
 756         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 757                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 758         }
 759
 760         if (info->mti_big_acl_used) {
 761                 if (acl_size == 0)
 762                         info->mti_big_acl_used = 0;
 763                 else
 764                         req_capsule_shrink(pill, &RMF_ACL, 0, RCL_SERVER);
 765         } else if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER)) {
 766                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 767         } else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER)) {
 768                 req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
 769         }
 770
 771         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 772             !(body->mbo_valid & OBD_MD_FLMDSCAPA))
 773                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 774
 775         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 776             !(body->mbo_valid & OBD_MD_FLOSSCAPA))
 777                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 778
 779         /*
 780          * Some more field should be shrinked if needed.
 781          * This should be done by those who added fields to reply message.
 782          */
 783
 784         /* Grow MD buffer if needed finally */
 785         if (info->mti_big_lmm_used) {
 786                 void *lmm;
 787
 788                 LASSERT(md_size > md_packed);
 789                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 790                        md_size - md_packed);
 791                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 792                 if (rc) {
 793                         /* we can't answer with proper LOV EA, drop flags,
 794                          * the rc is also returned so this request is
 795                          * considered as failed */
 796                         body->mbo_valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 797                         /* don't return transno along with error */
 798                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 799                 } else {
 800                         /* now we need to pack right LOV/LMV EA */
 801                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 802                         if (info->mti_attr.ma_valid & MA_LOV) {
 803                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 804                                                              RCL_SERVER) ==
 805                                                 info->mti_attr.ma_lmm_size);
 806                                 memcpy(lmm, info->mti_attr.ma_lmm,
 807                                        info->mti_attr.ma_lmm_size);
 808                         } else if (info->mti_attr.ma_valid & MA_LMV) {
 809                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 810                                                              RCL_SERVER) ==
 811                                                 info->mti_attr.ma_lmv_size);
 812                                 memcpy(lmm, info->mti_attr.ma_lmv,
 813                                        info->mti_attr.ma_lmv_size);
 814                         }
 815                 }
 816
 817                 /* update mdt_max_mdsize so clients will be aware about that */
 818                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 819                         info->mti_mdt->mdt_max_mdsize =
 820                                                 info->mti_attr.ma_lmm_size;
 821                 info->mti_big_lmm_used = 0;
 822         }
 823
 824         if (info->mti_big_acl_used) {
 825                 CDEBUG(D_INFO, "Enlarge reply ACL buffer to %d bytes\n",
 826                        acl_size);
 827
 828                 rc = req_capsule_server_grow(pill, &RMF_ACL, acl_size);
 829                 if (rc) {
 830                         body->mbo_valid &= ~OBD_MD_FLACL;
 831                 } else {
 832                         void *acl = req_capsule_server_get(pill, &RMF_ACL);
 833
 834                         memcpy(acl, info->mti_big_acl, acl_size);
 835                 }
 836
 837                 info->mti_big_acl_used = 0;
 838         }
 839
 840         RETURN(rc);
 841 }
 842
 843
 844 /* if object is dying, pack the lov/llog data,
 845  * parameter info->mti_attr should be valid at this point!
 846  * Also implements RAoLU policy */
 847 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 848                            struct md_attr *ma)
 849 {
 850         struct mdt_body *repbody = NULL;
 851         const struct lu_attr *la = &ma->ma_attr;
 852         struct coordinator *cdt = &info->mti_mdt->mdt_coordinator;
 853         int rc;
 854         __u64 need = 0;
 855         struct hsm_action_item hai = {
 856                 .hai_len = sizeof(hai),
 857                 .hai_action = HSMA_REMOVE,
 858                 .hai_extent.length = -1,
 859                 .hai_cookie = 0,
 860                 .hai_gid = 0,
 861         };
 862         int archive_id;
 863
 864         ENTRY;
 865
 866         if (mdt_info_req(info) != NULL) {
 867                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 868                 LASSERT(repbody != NULL);
 869         } else {
 870                 CDEBUG(D_INFO, "not running in a request/reply context\n");
 871         }
 872
 873         if ((ma->ma_valid & MA_INODE) && repbody != NULL)
 874                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 875
 876         if (ma->ma_valid & MA_LOV) {
 877                 CERROR("No need in LOV EA upon unlink\n");
 878                 dump_stack();
 879         }
 880         if (repbody != NULL)
 881                 repbody->mbo_eadatasize = 0;
 882
 883         /* Only check unlinked and archived if RAoLU and upon last close */
 884         if (!cdt->cdt_remove_archive_on_last_unlink ||
 885             atomic_read(&mo->mot_open_count) != 0)
 886                 RETURN(0);
 887
 888         /* mdt_attr_get_complex will clear ma_valid, so check here first */
 889         if ((ma->ma_valid & MA_INODE) && (ma->ma_attr.la_nlink != 0))
 890                 RETURN(0);
 891
 892         if ((ma->ma_valid & MA_HSM) && (!(ma->ma_hsm.mh_flags & HS_EXISTS)))
 893                 RETURN(0);
 894
 895         need |= (MA_INODE | MA_HSM) & ~ma->ma_valid;
 896         if (need != 0) {
 897                 /* ma->ma_valid is missing either MA_INODE, MA_HSM, or both,
 898                  * try setting them */
 899                 ma->ma_need |= need;
 900                 rc = mdt_attr_get_complex(info, mo, ma);
 901                 if (rc) {
 902                         CERROR("%s: unable to fetch missing attributes of"
 903                                DFID": rc=%d\n", mdt_obd_name(info->mti_mdt),
 904                                PFID(mdt_object_fid(mo)), rc);
 905                         RETURN(0);
 906                 }
 907
 908                 if (need & MA_INODE) {
 909                         if (ma->ma_valid & MA_INODE) {
 910                                 if (ma->ma_attr.la_nlink != 0)
 911                                         RETURN(0);
 912                         } else {
 913                                 RETURN(0);
 914                         }
 915                 }
 916
 917                 if (need & MA_HSM) {
 918                         if (ma->ma_valid & MA_HSM) {
 919                                 if (!(ma->ma_hsm.mh_flags & HS_EXISTS))
 920                                         RETURN(0);
 921                         } else {
 922                                 RETURN(0);
 923                         }
 924                 }
 925         }
 926
 927         /* RAoLU policy is active, last close on file has occured,
 928          * file is unlinked, file is archived, so create remove request
 929          * for copytool!
 930          * If CDT is not running, requests will be logged for later. */
 931         if (ma->ma_hsm.mh_arch_id != 0)
 932                 archive_id = ma->ma_hsm.mh_arch_id;
 933         else
 934                 archive_id = cdt->cdt_default_archive_id;
 935
 936         hai.hai_fid = *mdt_object_fid(mo);
 937
 938         rc = mdt_agent_record_add(info->mti_env, info->mti_mdt, archive_id, 0,
 939                                   &hai);
 940         if (rc)
 941                 CERROR("%s: unable to add HSM remove request for "DFID
 942                        ": rc=%d\n", mdt_obd_name(info->mti_mdt),
 943                        PFID(mdt_object_fid(mo)), rc);
 944
 945         RETURN(0);
 946 }
 947
 948 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 949                                   struct md_attr *ma)
 950 {
 951         __u64 out;
 952
 953         out = 0;
 954         if (in & MDS_ATTR_MODE)
 955                 out |= LA_MODE;
 956         if (in & MDS_ATTR_UID)
 957                 out |= LA_UID;
 958         if (in & MDS_ATTR_GID)
 959                 out |= LA_GID;
 960         if (in & MDS_ATTR_SIZE)
 961                 out |= LA_SIZE;
 962         if (in & MDS_ATTR_BLOCKS)
 963                 out |= LA_BLOCKS;
 964         if (in & MDS_ATTR_ATIME_SET)
 965                 out |= LA_ATIME;
 966         if (in & MDS_ATTR_CTIME_SET)
 967                 out |= LA_CTIME;
 968         if (in & MDS_ATTR_MTIME_SET)
 969                 out |= LA_MTIME;
 970         if (in & MDS_ATTR_ATTR_FLAG)
 971                 out |= LA_FLAGS;
 972         if (in & MDS_ATTR_KILL_SUID)
 973                 out |= LA_KILL_SUID;
 974         if (in & MDS_ATTR_KILL_SGID)
 975                 out |= LA_KILL_SGID;
 976         if (in & MDS_ATTR_PROJID)
 977                 out |= LA_PROJID;
 978         if (in & MDS_ATTR_LSIZE)
 979                 out |= LA_LSIZE;
 980         if (in & MDS_ATTR_LBLOCKS)
 981                 out |= LA_LBLOCKS;
 982
 983         if (in & MDS_ATTR_FROM_OPEN)
 984                 rr->rr_flags |= MRF_OPEN_TRUNC;
 985         if (in & MDS_OPEN_OWNEROVERRIDE)
 986                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
 987         if (in & MDS_ATTR_FORCE)
 988                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 989
 990         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID | MDS_ATTR_PROJID |
 991                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
 992                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
 993                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
 994                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
 995                 MDS_ATTR_FROM_OPEN | MDS_ATTR_LSIZE | MDS_ATTR_LBLOCKS |
 996                 MDS_OPEN_OWNEROVERRIDE);
 997         if (in != 0)
 998                 CERROR("Unknown attr bits: %#llx\n", in);
 999         return out;
1000 }
1001
1002 /* unpacking */
1003
1004 int mdt_name_unpack(struct req_capsule *pill,
1005                     const struct req_msg_field *field,
1006                     struct lu_name *ln,
1007                     enum mdt_name_flags flags)
1008 {
1009         ln->ln_name = req_capsule_client_get(pill, field);
1010         ln->ln_namelen = req_capsule_get_size(pill, field, RCL_CLIENT) - 1;
1011
1012         if (!lu_name_is_valid(ln)) {
1013                 ln->ln_name = NULL;
1014                 ln->ln_namelen = 0;
1015
1016                 return -EPROTO;
1017         }
1018
1019         if ((flags & MNF_FIX_ANON) &&
1020             ln->ln_namelen == 1 && ln->ln_name[0] == '/') {
1021                 /* Newer (3.x) kernels use a name of "/" for the
1022                  * "anonymous" disconnected dentries from NFS
1023                  * filehandle conversion. See d_obtain_alias(). */
1024                 ln->ln_name = NULL;
1025                 ln->ln_namelen = 0;
1026         }
1027
1028         return 0;
1029 }
1030
1031 static int mdt_file_secctx_unpack(struct req_capsule *pill,
1032                                   const char **secctx_name,
1033                                   void **secctx, size_t *secctx_size)
1034 {
1035         const char *name;
1036         size_t name_size;
1037
1038         *secctx_name = NULL;
1039         *secctx = NULL;
1040         *secctx_size = 0;
1041
1042         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT) ||
1043             !req_capsule_field_present(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT))
1044                 return 0;
1045
1046         name_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
1047                                          RCL_CLIENT);
1048         if (name_size == 0)
1049                 return 0;
1050
1051         name = req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1052         if (strnlen(name, name_size) != name_size - 1)
1053                 return -EPROTO;
1054
1055         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_CLIENT) ||
1056             !req_capsule_field_present(pill, &RMF_FILE_SECCTX, RCL_CLIENT))
1057                 return -EPROTO;
1058
1059         *secctx_name = name;
1060         *secctx = req_capsule_client_get(pill, &RMF_FILE_SECCTX);
1061         *secctx_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_CLIENT);
1062
1063         return 0;
1064 }
1065
1066 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
1067 {
1068         struct lu_ucred *uc = mdt_ucred(info);
1069         struct md_attr *ma = &info->mti_attr;
1070         struct lu_attr *la = &ma->ma_attr;
1071         struct req_capsule *pill = info->mti_pill;
1072         struct mdt_reint_record *rr = &info->mti_rr;
1073         struct mdt_rec_setattr *rec;
1074         struct lu_nodemap *nodemap;
1075
1076         ENTRY;
1077
1078         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1079         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1080         if (rec == NULL)
1081                 RETURN(-EFAULT);
1082
1083         /* This prior initialization is needed for old_init_ucred_reint() */
1084         uc->uc_fsuid = rec->sa_fsuid;
1085         uc->uc_fsgid = rec->sa_fsgid;
1086         uc->uc_cap   = rec->sa_cap;
1087         uc->uc_suppgids[0] = rec->sa_suppgid;
1088         uc->uc_suppgids[1] = -1;
1089
1090         rr->rr_fid1 = &rec->sa_fid;
1091         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
1092         la->la_mode  = rec->sa_mode;
1093         la->la_flags = rec->sa_attr_flags;
1094
1095         nodemap = nodemap_get_from_exp(info->mti_exp);
1096         if (IS_ERR(nodemap))
1097                 RETURN(PTR_ERR(nodemap));
1098
1099         la->la_uid   = nodemap_map_id(nodemap, NODEMAP_UID,
1100                                       NODEMAP_CLIENT_TO_FS, rec->sa_uid);
1101         la->la_gid   = nodemap_map_id(nodemap, NODEMAP_GID,
1102                                       NODEMAP_CLIENT_TO_FS, rec->sa_gid);
1103         la->la_projid = rec->sa_projid;
1104         nodemap_putref(nodemap);
1105
1106         la->la_size  = rec->sa_size;
1107         la->la_blocks = rec->sa_blocks;
1108         la->la_ctime = rec->sa_ctime;
1109         la->la_atime = rec->sa_atime;
1110         la->la_mtime = rec->sa_mtime;
1111         ma->ma_valid = MA_INODE;
1112
1113         ma->ma_attr_flags |= rec->sa_bias & (MDS_CLOSE_INTENT |
1114                                 MDS_DATA_MODIFIED | MDS_TRUNC_KEEP_LEASE);
1115         RETURN(0);
1116 }
1117
1118 static int mdt_close_handle_unpack(struct mdt_thread_info *info)
1119 {
1120         struct req_capsule *pill = info->mti_pill;
1121         struct mdt_ioepoch *ioepoch;
1122         ENTRY;
1123
1124         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
1125                 ioepoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
1126         else
1127                 ioepoch = NULL;
1128
1129         if (ioepoch == NULL)
1130                 RETURN(-EPROTO);
1131
1132         info->mti_close_handle = ioepoch->mio_handle;
1133
1134         RETURN(0);
1135 }
1136
1137 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
1138         struct req_capsule      *pill = info->mti_pill;
1139
1140         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
1141                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
1142                 if (info->mti_dlm_req == NULL)
1143                         RETURN(-EFAULT);
1144         }
1145
1146         RETURN(0);
1147 }
1148
1149 static int mdt_setattr_unpack(struct mdt_thread_info *info)
1150 {
1151         struct mdt_reint_record *rr = &info->mti_rr;
1152         struct md_attr          *ma = &info->mti_attr;
1153         struct req_capsule      *pill = info->mti_pill;
1154         int rc;
1155         ENTRY;
1156
1157         rc = mdt_setattr_unpack_rec(info);
1158         if (rc)
1159                 RETURN(rc);
1160
1161         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1162                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1163                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1164                                                         RCL_CLIENT);
1165                 if (rr->rr_eadatalen > 0) {
1166                         const struct lmv_user_md        *lum;
1167
1168                         lum = rr->rr_eadata;
1169                         /* Sigh ma_valid(from req) does not indicate whether
1170                          * it will set LOV/LMV EA, so we have to check magic */
1171                         if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
1172                                 ma->ma_valid |= MA_LMV;
1173                                 ma->ma_lmv = (void *)rr->rr_eadata;
1174                                 ma->ma_lmv_size = rr->rr_eadatalen;
1175                         } else {
1176                                 ma->ma_valid |= MA_LOV;
1177                                 ma->ma_lmm = (void *)rr->rr_eadata;
1178                                 ma->ma_lmm_size = rr->rr_eadatalen;
1179                         }
1180                 }
1181         }
1182
1183         rc = mdt_dlmreq_unpack(info);
1184         RETURN(rc);
1185 }
1186
1187 static int mdt_close_intent_unpack(struct mdt_thread_info *info)
1188 {
1189         struct md_attr          *ma = &info->mti_attr;
1190         struct req_capsule      *pill = info->mti_pill;
1191         ENTRY;
1192
1193         if (!(ma->ma_attr_flags & MDS_CLOSE_INTENT))
1194                 RETURN(0);
1195
1196         req_capsule_extend(pill, &RQF_MDS_CLOSE_INTENT);
1197
1198         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
1199             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
1200                 RETURN(-EFAULT);
1201
1202         RETURN(0);
1203 }
1204
1205 int mdt_close_unpack(struct mdt_thread_info *info)
1206 {
1207         int rc;
1208         ENTRY;
1209
1210         rc = mdt_close_handle_unpack(info);
1211         if (rc)
1212                 RETURN(rc);
1213
1214         rc = mdt_setattr_unpack_rec(info);
1215         if (rc)
1216                 RETURN(rc);
1217
1218         rc = mdt_close_intent_unpack(info);
1219         if (rc)
1220                 RETURN(rc);
1221
1222         RETURN(mdt_init_ucred_reint(info));
1223 }
1224
1225 static int mdt_create_unpack(struct mdt_thread_info *info)
1226 {
1227         struct lu_ucred *uc  = mdt_ucred(info);
1228         struct mdt_rec_create *rec;
1229         struct lu_attr *attr = &info->mti_attr.ma_attr;
1230         struct mdt_reint_record *rr = &info->mti_rr;
1231         struct req_capsule *pill = info->mti_pill;
1232         struct md_op_spec *sp = &info->mti_spec;
1233         int rc;
1234
1235         ENTRY;
1236
1237         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1238         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1239         if (rec == NULL)
1240                 RETURN(-EFAULT);
1241
1242         /* This prior initialization is needed for old_init_ucred_reint() */
1243         uc->uc_fsuid = rec->cr_fsuid;
1244         uc->uc_fsgid = rec->cr_fsgid;
1245         uc->uc_cap   = rec->cr_cap;
1246         uc->uc_suppgids[0] = rec->cr_suppgid1;
1247         uc->uc_suppgids[1] = -1;
1248         uc->uc_umask = rec->cr_umask;
1249
1250         rr->rr_fid1 = &rec->cr_fid1;
1251         rr->rr_fid2 = &rec->cr_fid2;
1252         attr->la_mode = rec->cr_mode;
1253         attr->la_rdev  = rec->cr_rdev;
1254         attr->la_uid   = rec->cr_fsuid;
1255         attr->la_gid   = rec->cr_fsgid;
1256         attr->la_ctime = rec->cr_time;
1257         attr->la_mtime = rec->cr_time;
1258         attr->la_atime = rec->cr_time;
1259         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
1260                          LA_CTIME | LA_MTIME | LA_ATIME;
1261         memset(&sp->u, 0, sizeof(sp->u));
1262         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1263
1264         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1265         if (rc < 0)
1266                 RETURN(rc);
1267
1268         if (S_ISLNK(attr->la_mode)) {
1269                 const char *tgt = NULL;
1270
1271                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1272                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
1273                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1274                         sp->u.sp_symname = tgt;
1275                 }
1276                 if (tgt == NULL)
1277                         RETURN(-EFAULT);
1278         } else {
1279                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_ACL);
1280                 if (S_ISDIR(attr->la_mode) &&
1281                     req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
1282                         sp->u.sp_ea.eadata =
1283                                 req_capsule_client_get(pill, &RMF_EADATA);
1284                         sp->u.sp_ea.eadatalen =
1285                                 req_capsule_get_size(pill, &RMF_EADATA,
1286                                                      RCL_CLIENT);
1287                         sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
1288                 }
1289         }
1290
1291         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1292                                     &sp->sp_cr_file_secctx,
1293                                     &sp->sp_cr_file_secctx_size);
1294         if (rc < 0)
1295                 RETURN(rc);
1296
1297         rc = mdt_dlmreq_unpack(info);
1298         RETURN(rc);
1299 }
1300
1301 static int mdt_link_unpack(struct mdt_thread_info *info)
1302 {
1303         struct lu_ucred *uc  = mdt_ucred(info);
1304         struct mdt_rec_link *rec;
1305         struct lu_attr *attr = &info->mti_attr.ma_attr;
1306         struct mdt_reint_record *rr = &info->mti_rr;
1307         struct req_capsule *pill = info->mti_pill;
1308         int rc;
1309
1310         ENTRY;
1311
1312         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1313         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1314         if (rec == NULL)
1315                 RETURN(-EFAULT);
1316
1317         /* This prior initialization is needed for old_init_ucred_reint() */
1318         uc->uc_fsuid = rec->lk_fsuid;
1319         uc->uc_fsgid = rec->lk_fsgid;
1320         uc->uc_cap   = rec->lk_cap;
1321         uc->uc_suppgids[0] = rec->lk_suppgid1;
1322         uc->uc_suppgids[1] = rec->lk_suppgid2;
1323
1324         attr->la_uid = rec->lk_fsuid;
1325         attr->la_gid = rec->lk_fsgid;
1326         rr->rr_fid1 = &rec->lk_fid1;
1327         rr->rr_fid2 = &rec->lk_fid2;
1328         attr->la_ctime = rec->lk_time;
1329         attr->la_mtime = rec->lk_time;
1330         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1331
1332         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1333         if (rc < 0)
1334                 RETURN(rc);
1335
1336         rc = mdt_dlmreq_unpack(info);
1337
1338         RETURN(rc);
1339 }
1340
1341 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1342 {
1343         struct lu_ucred *uc  = mdt_ucred(info);
1344         struct mdt_rec_unlink *rec;
1345         struct lu_attr *attr = &info->mti_attr.ma_attr;
1346         struct mdt_reint_record *rr = &info->mti_rr;
1347         struct req_capsule *pill = info->mti_pill;
1348         int rc;
1349
1350         ENTRY;
1351
1352         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1353         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1354         if (rec == NULL)
1355                 RETURN(-EFAULT);
1356
1357         /* This prior initialization is needed for old_init_ucred_reint() */
1358         uc->uc_fsuid = rec->ul_fsuid;
1359         uc->uc_fsgid = rec->ul_fsgid;
1360         uc->uc_cap   = rec->ul_cap;
1361         uc->uc_suppgids[0] = rec->ul_suppgid1;
1362         uc->uc_suppgids[1] = -1;
1363
1364         attr->la_uid = rec->ul_fsuid;
1365         attr->la_gid = rec->ul_fsgid;
1366         rr->rr_fid1 = &rec->ul_fid1;
1367         rr->rr_fid2 = &rec->ul_fid2;
1368         attr->la_ctime = rec->ul_time;
1369         attr->la_mtime = rec->ul_time;
1370         attr->la_mode  = rec->ul_mode;
1371         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1372
1373         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1374         if (rc < 0)
1375                 RETURN(rc);
1376
1377         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1378
1379         rc = mdt_dlmreq_unpack(info);
1380         RETURN(rc);
1381 }
1382
1383 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1384 {
1385         info->mti_spec.sp_rm_entry = 1;
1386         return mdt_unlink_unpack(info);
1387 }
1388
1389 static int mdt_rename_unpack(struct mdt_thread_info *info)
1390 {
1391         struct lu_ucred *uc = mdt_ucred(info);
1392         struct mdt_rec_rename *rec;
1393         struct lu_attr *attr = &info->mti_attr.ma_attr;
1394         struct mdt_reint_record *rr = &info->mti_rr;
1395         struct req_capsule *pill = info->mti_pill;
1396         struct md_op_spec *spec = &info->mti_spec;
1397         int rc;
1398
1399         ENTRY;
1400
1401         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1402         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1403         if (rec == NULL)
1404                 RETURN(-EFAULT);
1405
1406         /* This prior initialization is needed for old_init_ucred_reint() */
1407         uc->uc_fsuid = rec->rn_fsuid;
1408         uc->uc_fsgid = rec->rn_fsgid;
1409         uc->uc_cap   = rec->rn_cap;
1410         uc->uc_suppgids[0] = rec->rn_suppgid1;
1411         uc->uc_suppgids[1] = rec->rn_suppgid2;
1412
1413         attr->la_uid = rec->rn_fsuid;
1414         attr->la_gid = rec->rn_fsgid;
1415         rr->rr_fid1 = &rec->rn_fid1;
1416         rr->rr_fid2 = &rec->rn_fid2;
1417         attr->la_ctime = rec->rn_time;
1418         attr->la_mtime = rec->rn_time;
1419         /* rename_tgt contains the mode already */
1420         attr->la_mode = rec->rn_mode;
1421         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1422
1423         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1424         if (rc < 0)
1425                 RETURN(rc);
1426
1427         rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
1428         if (rc < 0)
1429                 RETURN(rc);
1430
1431         spec->no_create = !!req_is_replay(mdt_info_req(info));
1432
1433         rc = mdt_dlmreq_unpack(info);
1434
1435         RETURN(rc);
1436 }
1437
1438 static int mdt_migrate_unpack(struct mdt_thread_info *info)
1439 {
1440         struct lu_ucred *uc = mdt_ucred(info);
1441         struct mdt_rec_rename *rec;
1442         struct lu_attr *attr = &info->mti_attr.ma_attr;
1443         struct mdt_reint_record *rr = &info->mti_rr;
1444         struct req_capsule *pill = info->mti_pill;
1445         struct md_op_spec *spec = &info->mti_spec;
1446         int rc;
1447
1448         ENTRY;
1449
1450         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1451         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1452         if (rec == NULL)
1453                 RETURN(-EFAULT);
1454
1455         /* This prior initialization is needed for old_init_ucred_reint() */
1456         uc->uc_fsuid = rec->rn_fsuid;
1457         uc->uc_fsgid = rec->rn_fsgid;
1458         uc->uc_cap   = rec->rn_cap;
1459         uc->uc_suppgids[0] = rec->rn_suppgid1;
1460         uc->uc_suppgids[1] = rec->rn_suppgid2;
1461
1462         attr->la_uid = rec->rn_fsuid;
1463         attr->la_gid = rec->rn_fsgid;
1464         rr->rr_fid1 = &rec->rn_fid1;
1465         rr->rr_fid2 = &rec->rn_fid2;
1466         attr->la_ctime = rec->rn_time;
1467         attr->la_mtime = rec->rn_time;
1468         /* rename_tgt contains the mode already */
1469         attr->la_mode = rec->rn_mode;
1470         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1471
1472         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1473         if (rc < 0)
1474                 RETURN(rc);
1475
1476         if (rec->rn_bias & MDS_CLOSE_MIGRATE) {
1477                 rc = mdt_close_handle_unpack(info);
1478                 if (rc)
1479                         RETURN(rc);
1480
1481                 spec->sp_migrate_close = 1;
1482         }
1483
1484         /* lustre version > 2.11 migration packs lum */
1485         if (req_capsule_has_field(pill, &RMF_EADATA, RCL_CLIENT)) {
1486                 if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1487                         rr->rr_eadatalen = req_capsule_get_size(pill,
1488                                                                 &RMF_EADATA,
1489                                                                 RCL_CLIENT);
1490                         if (rr->rr_eadatalen > 0) {
1491                                 rr->rr_eadata = req_capsule_client_get(pill,
1492                                                                 &RMF_EADATA);
1493                                 spec->u.sp_ea.eadatalen = rr->rr_eadatalen;
1494                                 spec->u.sp_ea.eadata = rr->rr_eadata;
1495                                 spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
1496                         }
1497                 } else {
1498                         /* old client doesn't provide lum. */
1499                         RETURN(-EOPNOTSUPP);
1500                 }
1501         }
1502
1503         spec->no_create = !!req_is_replay(mdt_info_req(info));
1504
1505         rc = mdt_dlmreq_unpack(info);
1506
1507         RETURN(rc);
1508 }
1509
1510 /*
1511  * please see comment above LOV_MAGIC_V1_DEFINED
1512  */
1513 void mdt_fix_lov_magic(struct mdt_thread_info *info, void *eadata)
1514 {
1515         struct lov_user_md_v1   *v1 = eadata;
1516
1517         LASSERT(v1);
1518
1519         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1520                 if ((v1->lmm_magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
1521                         v1->lmm_magic |= LOV_MAGIC_DEFINED;
1522                 else if ((v1->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
1523                          __swab32(LOV_MAGIC_MAGIC))
1524                         v1->lmm_magic |= __swab32(LOV_MAGIC_DEFINED);
1525         }
1526 }
1527
1528 static int mdt_open_unpack(struct mdt_thread_info *info)
1529 {
1530         struct lu_ucred *uc = mdt_ucred(info);
1531         struct mdt_rec_create *rec;
1532         struct lu_attr *attr = &info->mti_attr.ma_attr;
1533         struct req_capsule *pill = info->mti_pill;
1534         struct mdt_reint_record *rr = &info->mti_rr;
1535         struct ptlrpc_request *req = mdt_info_req(info);
1536         struct md_op_spec *sp = &info->mti_spec;
1537         int rc;
1538         ENTRY;
1539
1540         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1541         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1542         if (rec == NULL)
1543                 RETURN(-EFAULT);
1544
1545         /* This prior initialization is needed for old_init_ucred_reint() */
1546         uc->uc_fsuid = rec->cr_fsuid;
1547         uc->uc_fsgid = rec->cr_fsgid;
1548         uc->uc_cap   = rec->cr_cap;
1549         uc->uc_suppgids[0] = rec->cr_suppgid1;
1550         uc->uc_suppgids[1] = rec->cr_suppgid2;
1551         uc->uc_umask = rec->cr_umask;
1552
1553         rr->rr_fid1   = &rec->cr_fid1;
1554         rr->rr_fid2   = &rec->cr_fid2;
1555         rr->rr_handle = &rec->cr_old_handle;
1556         attr->la_mode = rec->cr_mode;
1557         attr->la_rdev  = rec->cr_rdev;
1558         attr->la_uid   = rec->cr_fsuid;
1559         attr->la_gid   = rec->cr_fsgid;
1560         attr->la_ctime = rec->cr_time;
1561         attr->la_mtime = rec->cr_time;
1562         attr->la_atime = rec->cr_time;
1563         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1564                          LA_CTIME | LA_MTIME | LA_ATIME;
1565         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1566         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1567         /* Do not trigger ASSERTION if client miss to set such flags. */
1568         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1569                 RETURN(-EPROTO);
1570
1571         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1572
1573         mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);
1574
1575         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1576                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1577                                                         RCL_CLIENT);
1578                 if (rr->rr_eadatalen > 0) {
1579                         rr->rr_eadata = req_capsule_client_get(pill,
1580                                                                &RMF_EADATA);
1581                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1582                         sp->u.sp_ea.eadata = rr->rr_eadata;
1583                         sp->no_create = !!req_is_replay(req);
1584                         mdt_fix_lov_magic(info, rr->rr_eadata);
1585                 }
1586
1587                 /*
1588                  * Client default md_size may be 0 right after client start,
1589                  * until all osc are connected, set here just some reasonable
1590                  * value to prevent misbehavior.
1591                  */
1592                 if (rr->rr_eadatalen == 0 &&
1593                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1594                         rr->rr_eadatalen = MIN_MD_SIZE;
1595         }
1596
1597         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1598                                     &sp->sp_cr_file_secctx,
1599                                     &sp->sp_cr_file_secctx_size);
1600
1601         RETURN(rc);
1602 }
1603
1604 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1605 {
1606         struct mdt_reint_record *rr = &info->mti_rr;
1607         struct lu_ucred *uc = mdt_ucred(info);
1608         struct lu_attr *attr = &info->mti_attr.ma_attr;
1609         struct req_capsule *pill = info->mti_pill;
1610         struct mdt_rec_setxattr *rec;
1611         int rc;
1612         ENTRY;
1613
1614
1615         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1616                  sizeof(struct mdt_rec_reint));
1617
1618         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1619         if (rec == NULL)
1620                 RETURN(-EFAULT);
1621
1622         /* This prior initialization is needed for old_init_ucred_reint() */
1623         uc->uc_fsuid  = rec->sx_fsuid;
1624         uc->uc_fsgid  = rec->sx_fsgid;
1625         uc->uc_cap    = rec->sx_cap;
1626         uc->uc_suppgids[0] = rec->sx_suppgid1;
1627         uc->uc_suppgids[1] = -1;
1628
1629         rr->rr_opcode = rec->sx_opcode;
1630         rr->rr_fid1   = &rec->sx_fid;
1631         attr->la_valid = rec->sx_valid;
1632         attr->la_ctime = rec->sx_time;
1633         attr->la_size = rec->sx_size;
1634         attr->la_flags = rec->sx_flags;
1635
1636         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1637         if (rc < 0)
1638                 RETURN(rc);
1639
1640         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1641                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1642                                                         RCL_CLIENT);
1643                 if (rr->rr_eadatalen > 0) {
1644                         rr->rr_eadata = req_capsule_client_get(pill,
1645                                                                &RMF_EADATA);
1646                         if (rr->rr_eadata == NULL)
1647                                 RETURN(-EFAULT);
1648                 } else {
1649                         rr->rr_eadata = NULL;
1650                 }
1651         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1652                 CDEBUG(D_INFO, "no xattr data supplied\n");
1653                 RETURN(-EFAULT);
1654         }
1655
1656         if (mdt_dlmreq_unpack(info) < 0)
1657                 RETURN(-EPROTO);
1658
1659         RETURN(0);
1660 }
1661
1662 static int mdt_resync_unpack(struct mdt_thread_info *info)
1663 {
1664         struct req_capsule      *pill = info->mti_pill;
1665         struct mdt_reint_record *rr   = &info->mti_rr;
1666         struct lu_ucred         *uc     = mdt_ucred(info);
1667         struct mdt_rec_resync   *rec;
1668         ENTRY;
1669
1670         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1671         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1672         if (rec == NULL)
1673                 RETURN(-EFAULT);
1674
1675         /* This prior initialization is needed for old_init_ucred_reint() */
1676         uc->uc_fsuid = rec->rs_fsuid;
1677         uc->uc_fsgid = rec->rs_fsgid;
1678         uc->uc_cap   = rec->rs_cap;
1679
1680         rr->rr_fid1   = &rec->rs_fid;
1681
1682         /* cookie doesn't need to be swapped but it has been swapped
1683          * in lustre_swab_mdt_rec_reint() as rr_mtime, so here it needs
1684          * restoring. */
1685         if (ptlrpc_req_need_swab(mdt_info_req(info)))
1686                 __swab64s(&rec->rs_handle.cookie);
1687         rr->rr_handle = &rec->rs_handle;
1688
1689         RETURN(mdt_dlmreq_unpack(info));
1690 }
1691
1692 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1693
1694 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1695         [REINT_SETATTR]  = mdt_setattr_unpack,
1696         [REINT_CREATE]   = mdt_create_unpack,
1697         [REINT_LINK]     = mdt_link_unpack,
1698         [REINT_UNLINK]   = mdt_unlink_unpack,
1699         [REINT_RENAME]   = mdt_rename_unpack,
1700         [REINT_OPEN]     = mdt_open_unpack,
1701         [REINT_SETXATTR] = mdt_setxattr_unpack,
1702         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1703         [REINT_MIGRATE]  = mdt_migrate_unpack,
1704         [REINT_RESYNC]   = mdt_resync_unpack,
1705 };
1706
1707 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1708 {
1709         int rc;
1710         ENTRY;
1711
1712         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1713         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1714                 info->mti_rr.rr_opcode = op;
1715                 rc = mdt_reint_unpackers[op](info);
1716         } else {
1717                 CERROR("Unexpected opcode %d\n", op);
1718                 rc = -EFAULT;
1719         }
1720         RETURN(rc);
1721 }