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         bool is_nm_gid_squashed = false;
 182         int rc = 0;
 183
 184         ENTRY;
 185
 186         LASSERT(req->rq_auth_gss);
 187         LASSERT(!req->rq_auth_usr_mdt);
 188         LASSERT(req->rq_user_desc);
 189         LASSERT(ucred != NULL);
 190
 191         ucred->uc_valid = UCRED_INVALID;
 192
 193         nodemap = nodemap_get_from_exp(info->mti_exp);
 194         if (IS_ERR(nodemap))
 195                 RETURN(PTR_ERR(nodemap));
 196
 197         pud->pud_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 198                                        NODEMAP_CLIENT_TO_FS, pud->pud_uid);
 199         pud->pud_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 200                                        NODEMAP_CLIENT_TO_FS, pud->pud_gid);
 201         pud->pud_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 202                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsuid);
 203         pud->pud_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 204                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsgid);
 205
 206         ucred->uc_o_uid = pud->pud_uid;
 207         ucred->uc_o_gid = pud->pud_gid;
 208         ucred->uc_o_fsuid = pud->pud_fsuid;
 209         ucred->uc_o_fsgid = pud->pud_fsgid;
 210
 211         if (nodemap && ucred->uc_o_uid == nodemap->nm_squash_uid) {
 212                 /* deny access before we get identity ref */
 213                 if (nodemap->nmf_deny_unknown) {
 214                         nodemap_putref(nodemap);
 215                         RETURN(-EACCES);
 216                 }
 217
 218                 ucred->uc_fsuid = nodemap->nm_squash_uid;
 219                 ucred->uc_fsgid = nodemap->nm_squash_gid;
 220                 ucred->uc_cap = 0;
 221                 ucred->uc_suppgids[0] = -1;
 222                 ucred->uc_suppgids[1] = -1;
 223         }
 224
 225         if (nodemap && ucred->uc_o_gid == nodemap->nm_squash_gid)
 226                 is_nm_gid_squashed = true;
 227
 228         nodemap_putref(nodemap);
 229
 230         if (type == BODY_INIT) {
 231                 struct mdt_body *body = (struct mdt_body *)buf;
 232
 233                 ucred->uc_suppgids[0] = body->mbo_suppgid;
 234                 ucred->uc_suppgids[1] = -1;
 235         }
 236
 237         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 238             req->rq_auth_uid != pud->pud_uid) {
 239                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 240                        "while client claims %u:%u/%u:%u\n",
 241                        libcfs_nid2str(peernid), req->rq_auth_uid,
 242                        pud->pud_uid, pud->pud_gid,
 243                        pud->pud_fsuid, pud->pud_fsgid);
 244                 RETURN(-EACCES);
 245         }
 246
 247         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 248                 ucred->uc_identity = NULL;
 249                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM | CFS_SETGRP_PERM;
 250         } else {
 251                 struct md_identity *identity;
 252
 253                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 254                                             pud->pud_uid);
 255                 if (IS_ERR(identity)) {
 256                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 257                                 ucred->uc_identity = NULL;
 258                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 259                                        CFS_SETGRP_PERM;
 260                         } else {
 261                                 CDEBUG(D_SEC,
 262                                        "Deny access without identity: uid %u\n",
 263                                        pud->pud_uid);
 264                                 RETURN(-EACCES);
 265                         }
 266                 } else {
 267                         ucred->uc_identity = identity;
 268                         perm = mdt_identity_get_perm(ucred->uc_identity,
 269                                                      peernid);
 270                 }
 271         }
 272
 273         /* find out the setuid/setgid attempt */
 274         setuid = (pud->pud_uid != pud->pud_fsuid);
 275         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 276                   (ucred->uc_identity &&
 277                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
 278
 279         /* check permission of setuid */
 280         if (setuid && !(perm & CFS_SETUID_PERM)) {
 281                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 282                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 283                 GOTO(out, rc = -EACCES);
 284         }
 285
 286         /* check permission of setgid */
 287         if (setgid && !(perm & CFS_SETGID_PERM)) {
 288                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 289                        "from %s\n", pud->pud_uid, pud->pud_gid,
 290                        pud->pud_fsuid, pud->pud_fsgid,
 291                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
 292                 GOTO(out, rc = -EACCES);
 293         }
 294
 295         if (perm & CFS_SETGRP_PERM) {
 296                 /* only set groups if GID is not squashed */
 297                 if (pud->pud_ngroups && !is_nm_gid_squashed) {
 298                         /* setgroups for local client */
 299                         ucred->uc_ginfo = groups_alloc(pud->pud_ngroups);
 300                         if (!ucred->uc_ginfo) {
 301                                 CERROR("failed to alloc %d groups\n",
 302                                        pud->pud_ngroups);
 303                                 GOTO(out, rc = -ENOMEM);
 304                         }
 305
 306                         lustre_groups_from_list(ucred->uc_ginfo,
 307                                                 pud->pud_groups);
 308                         lustre_groups_sort(ucred->uc_ginfo);
 309                 } else {
 310                         ucred->uc_suppgids[0] = -1;
 311                         ucred->uc_suppgids[1] = -1;
 312                         ucred->uc_ginfo = NULL;
 313                 }
 314         } else {
 315                 ucred->uc_suppgids[0] = -1;
 316                 ucred->uc_suppgids[1] = -1;
 317                 ucred->uc_ginfo = NULL;
 318         }
 319
 320         ucred->uc_uid = pud->pud_uid;
 321         ucred->uc_gid = pud->pud_gid;
 322         ucred->uc_fsuid = pud->pud_fsuid;
 323         ucred->uc_fsgid = pud->pud_fsgid;
 324
 325         /* process root_squash here. */
 326         mdt_root_squash(info, peernid);
 327
 328         /* remove fs privilege for non-root user. */
 329         if (ucred->uc_fsuid && drop_fs_cap)
 330                 ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
 331         else
 332                 ucred->uc_cap = pud->pud_cap;
 333         ucred->uc_valid = UCRED_NEW;
 334         ucred_set_jobid(info, ucred);
 335         ucred_set_nid(info, ucred);
 336         ucred_set_audit_enabled(info, ucred);
 337
 338         EXIT;
 339
 340 out:
 341         if (rc) {
 342                 if (ucred->uc_ginfo) {
 343                         put_group_info(ucred->uc_ginfo);
 344                         ucred->uc_ginfo = NULL;
 345                 }
 346                 if (ucred->uc_identity) {
 347                         mdt_identity_put(mdt->mdt_identity_cache,
 348                                          ucred->uc_identity);
 349                         ucred->uc_identity = NULL;
 350                 }
 351         }
 352
 353         return rc;
 354 }
 355
 356 /**
 357  * Check whether allow the client to set supplementary group IDs or not.
 358  *
 359  * \param[in] info      pointer to the thread context
 360  * \param[in] uc        pointer to the RPC user descriptor
 361  *
 362  * \retval              true if allow to set supplementary group IDs
 363  * \retval              false for other cases
 364  */
 365 bool allow_client_chgrp(struct mdt_thread_info *info, struct lu_ucred *uc)
 366 {
 367         __u32 perm;
 368
 369         /* 1. If identity_upcall is disabled,
 370          *    permit local client to do anything. */
 371         if (is_identity_get_disabled(info->mti_mdt->mdt_identity_cache))
 372                 return true;
 373
 374         /* 2. If fail to get related identities, then forbid any client to
 375          *    set supplementary group IDs. */
 376         if (uc->uc_identity == NULL)
 377                 return false;
 378
 379         /* 3. Check the permission in the identities. */
 380         perm = mdt_identity_get_perm(uc->uc_identity,
 381                                      mdt_info_req(info)->rq_peer.nid);
 382         if (perm & CFS_SETGRP_PERM)
 383                 return true;
 384
 385         return false;
 386 }
 387
 388 int mdt_check_ucred(struct mdt_thread_info *info)
 389 {
 390         struct ptlrpc_request   *req = mdt_info_req(info);
 391         struct mdt_device       *mdt = info->mti_mdt;
 392         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 393         struct lu_ucred         *ucred = mdt_ucred(info);
 394         struct md_identity      *identity = NULL;
 395         lnet_nid_t               peernid = req->rq_peer.nid;
 396         __u32                    perm = 0;
 397         int                      setuid;
 398         int                      setgid;
 399         int                      rc = 0;
 400
 401         ENTRY;
 402
 403         LASSERT(ucred != NULL);
 404         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
 405                 RETURN(0);
 406
 407         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 408                 RETURN(0);
 409
 410         /* sanity check: if we use strong authentication, we expect the
 411          * uid which client claimed is true */
 412         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 413             req->rq_auth_uid != pud->pud_uid) {
 414                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 415                        "while client claims %u:%u/%u:%u\n",
 416                        libcfs_nid2str(peernid), req->rq_auth_uid,
 417                        pud->pud_uid, pud->pud_gid,
 418                        pud->pud_fsuid, pud->pud_fsgid);
 419                 RETURN(-EACCES);
 420         }
 421
 422         if (is_identity_get_disabled(mdt->mdt_identity_cache))
 423                 RETURN(0);
 424
 425         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 426         if (IS_ERR(identity)) {
 427                 if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 428                         RETURN(0);
 429                 } else {
 430                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 431                                pud->pud_uid);
 432                         RETURN(-EACCES);
 433                 }
 434         }
 435
 436         perm = mdt_identity_get_perm(identity, peernid);
 437         /* find out the setuid/setgid attempt */
 438         setuid = (pud->pud_uid != pud->pud_fsuid);
 439         setgid = (pud->pud_gid != pud->pud_fsgid ||
 440                   pud->pud_gid != identity->mi_gid);
 441
 442         /* check permission of setuid */
 443         if (setuid && !(perm & CFS_SETUID_PERM)) {
 444                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 445                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 446                 GOTO(out, rc = -EACCES);
 447         }
 448
 449         /* check permission of setgid */
 450         if (setgid && !(perm & CFS_SETGID_PERM)) {
 451                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 452                        "from %s\n", pud->pud_uid, pud->pud_gid,
 453                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 454                        libcfs_nid2str(peernid));
 455                 GOTO(out, rc = -EACCES);
 456         }
 457
 458         EXIT;
 459
 460 out:
 461         mdt_identity_put(mdt->mdt_identity_cache, identity);
 462         return rc;
 463 }
 464
 465 static int old_init_ucred_common(struct mdt_thread_info *info,
 466                                  struct lu_nodemap *nodemap,
 467                                  bool drop_fs_cap)
 468 {
 469         struct lu_ucred         *uc = mdt_ucred(info);
 470         struct mdt_device       *mdt = info->mti_mdt;
 471         struct md_identity      *identity = NULL;
 472
 473         if (nodemap && uc->uc_o_uid == nodemap->nm_squash_uid) {
 474                 /* deny access before we get identity ref */
 475                 if (nodemap->nmf_deny_unknown)
 476                         RETURN(-EACCES);
 477
 478                 uc->uc_fsuid = nodemap->nm_squash_uid;
 479                 uc->uc_fsgid = nodemap->nm_squash_gid;
 480                 uc->uc_cap = 0;
 481                 uc->uc_suppgids[0] = -1;
 482                 uc->uc_suppgids[1] = -1;
 483         }
 484
 485         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 486                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 487                                             uc->uc_fsuid);
 488                 if (IS_ERR(identity)) {
 489                         if (unlikely(PTR_ERR(identity) == -EREMCHG ||
 490                                      uc->uc_cap & CFS_CAP_FS_MASK)) {
 491                                 identity = NULL;
 492                         } else {
 493                                 CDEBUG(D_SEC, "Deny access without identity: "
 494                                        "uid %u\n", uc->uc_fsuid);
 495                                 RETURN(-EACCES);
 496                         }
 497                 }
 498         }
 499         uc->uc_identity = identity;
 500
 501         /* process root_squash here. */
 502         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 503
 504         /* remove fs privilege for non-root user. */
 505         if (uc->uc_fsuid && drop_fs_cap)
 506                 uc->uc_cap &= ~CFS_CAP_FS_MASK;
 507         uc->uc_valid = UCRED_OLD;
 508         ucred_set_jobid(info, uc);
 509         ucred_set_nid(info, uc);
 510         ucred_set_audit_enabled(info, uc);
 511
 512         EXIT;
 513
 514         return 0;
 515 }
 516
 517 static int old_init_ucred(struct mdt_thread_info *info,
 518                           struct mdt_body *body, bool drop_fs_cap)
 519 {
 520         struct lu_ucred *uc = mdt_ucred(info);
 521         struct lu_nodemap *nodemap;
 522         int rc;
 523         ENTRY;
 524
 525         nodemap = nodemap_get_from_exp(info->mti_exp);
 526         if (IS_ERR(nodemap))
 527                 RETURN(PTR_ERR(nodemap));
 528
 529         body->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 530                                        NODEMAP_CLIENT_TO_FS, body->mbo_uid);
 531         body->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 532                                        NODEMAP_CLIENT_TO_FS, body->mbo_gid);
 533         body->mbo_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 534                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsuid);
 535         body->mbo_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 536                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsgid);
 537
 538         LASSERT(uc != NULL);
 539         uc->uc_valid = UCRED_INVALID;
 540         uc->uc_o_uid = uc->uc_uid = body->mbo_uid;
 541         uc->uc_o_gid = uc->uc_gid = body->mbo_gid;
 542         uc->uc_o_fsuid = uc->uc_fsuid = body->mbo_fsuid;
 543         uc->uc_o_fsgid = uc->uc_fsgid = body->mbo_fsgid;
 544         uc->uc_suppgids[0] = body->mbo_suppgid;
 545         uc->uc_suppgids[1] = -1;
 546         uc->uc_ginfo = NULL;
 547         uc->uc_cap = body->mbo_capability;
 548
 549         rc = old_init_ucred_common(info, nodemap, drop_fs_cap);
 550         nodemap_putref(nodemap);
 551
 552         RETURN(rc);
 553 }
 554
 555 static int old_init_ucred_reint(struct mdt_thread_info *info)
 556 {
 557         struct lu_ucred *uc = mdt_ucred(info);
 558         struct lu_nodemap *nodemap;
 559         int rc;
 560         ENTRY;
 561
 562         nodemap = nodemap_get_from_exp(info->mti_exp);
 563         if (IS_ERR(nodemap))
 564                 RETURN(PTR_ERR(nodemap));
 565
 566         LASSERT(uc != NULL);
 567
 568         uc->uc_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 569                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsuid);
 570         uc->uc_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 571                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsgid);
 572
 573         uc->uc_valid = UCRED_INVALID;
 574         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 575         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 576         uc->uc_ginfo = NULL;
 577
 578         rc = old_init_ucred_common(info, nodemap, true); /* drop_fs_cap=true */
 579         nodemap_putref(nodemap);
 580
 581         RETURN(rc);
 582 }
 583
 584 static inline int __mdt_init_ucred(struct mdt_thread_info *info,
 585                                    struct mdt_body *body,
 586                                    bool drop_fs_cap)
 587 {
 588         struct ptlrpc_request   *req = mdt_info_req(info);
 589         struct lu_ucred         *uc  = mdt_ucred(info);
 590
 591         LASSERT(uc != NULL);
 592         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 593                 return 0;
 594
 595         mdt_exit_ucred(info);
 596
 597         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 598                 return old_init_ucred(info, body, drop_fs_cap);
 599         else
 600                 return new_init_ucred(info, BODY_INIT, body, drop_fs_cap);
 601 }
 602
 603 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 604 {
 605         return __mdt_init_ucred(info, body, true);
 606 }
 607
 608 /* LU-6528 when "no_subtree_check" is set for NFS export, nfsd_set_fh_dentry()
 609  * doesn't set correct fsuid explicitely, but raise capability to allow
 610  * exportfs_decode_fh() to reconnect disconnected dentry into dcache. So for
 611  * lookup (i.e. intent_getattr), we should keep FS capability, otherwise it
 612  * will fail permission check. */
 613 int mdt_init_ucred_intent_getattr(struct mdt_thread_info *info,
 614                                   struct mdt_body *body)
 615 {
 616         return __mdt_init_ucred(info, body, false);
 617 }
 618
 619 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 620 {
 621         struct ptlrpc_request *req = mdt_info_req(info);
 622         struct lu_ucred       *uc  = mdt_ucred(info);
 623         struct md_attr        *ma  = &info->mti_attr;
 624
 625         LASSERT(uc != NULL);
 626         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 627                 return 0;
 628
 629         /* LU-5564: for normal close request, skip permission check */
 630         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE &&
 631             !(ma->ma_attr_flags & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP)))
 632                 uc->uc_cap |= CFS_CAP_FS_MASK;
 633
 634         mdt_exit_ucred(info);
 635
 636         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 637                 return old_init_ucred_reint(info);
 638         else
 639                 return new_init_ucred(info, REC_INIT, NULL, true);
 640 }
 641
 642 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 643 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm, __u64 valid)
 644 {
 645         const struct lov_ost_data_v1 *lod;
 646         __u32 lmm_magic = le32_to_cpu(lmm->lmm_magic);
 647         __u16 count;
 648         int i;
 649
 650         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 651                 return;
 652
 653         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 654                POSTID(&lmm->lmm_oi), lmm_magic,
 655                le32_to_cpu(lmm->lmm_pattern));
 656
 657         /* No support for compount layouts yet */
 658         if (lmm_magic != LOV_MAGIC_V1 && lmm_magic != LOV_MAGIC_V3)
 659                 return;
 660
 661         count = le16_to_cpu(((struct lov_user_md *)lmm)->lmm_stripe_count);
 662         CDEBUG(level, "stripe_size=0x%x, stripe_count=0x%x\n",
 663                le32_to_cpu(lmm->lmm_stripe_size), count);
 664
 665         /* If it's a directory or a released file, then there are
 666          * no actual objects to print, so bail out. */
 667         if (valid & OBD_MD_FLDIREA ||
 668             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 669                 return;
 670
 671         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 672         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 673                 struct ost_id oi;
 674
 675                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 676                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 677                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 678         }
 679 }
 680
 681 void mdt_dump_lmv(unsigned int level, const union lmv_mds_md *lmv)
 682 {
 683         const struct lmv_mds_md_v1 *lmm1;
 684         const struct lmv_foreign_md *lfm;
 685         int                        i;
 686
 687         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 688                 return;
 689
 690         /* foreign LMV case */
 691         lfm = &lmv->lmv_foreign_md;
 692         if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN) {
 693                 CDEBUG_LIMIT(level,
 694                              "foreign magic 0x%08X, length %u, type %u, flags %u, value '%.*s'\n",
 695                              le32_to_cpu(lfm->lfm_magic),
 696                              le32_to_cpu(lfm->lfm_length),
 697                              le32_to_cpu(lfm->lfm_type),
 698                              le32_to_cpu(lfm->lfm_flags),
 699                              le32_to_cpu(lfm->lfm_length), lfm->lfm_value);
 700                 return;
 701         }
 702
 703         lmm1 = &lmv->lmv_md_v1;
 704         CDEBUG(level,
 705                "magic 0x%08X, master %#X stripe_count %#x hash_type %#x\n",
 706                le32_to_cpu(lmm1->lmv_magic),
 707                le32_to_cpu(lmm1->lmv_master_mdt_index),
 708                le32_to_cpu(lmm1->lmv_stripe_count),
 709                le32_to_cpu(lmm1->lmv_hash_type));
 710
 711         if (le32_to_cpu(lmm1->lmv_magic) == LMV_MAGIC_STRIPE)
 712                 return;
 713
 714         for (i = 0; i < le32_to_cpu(lmm1->lmv_stripe_count); i++) {
 715                 struct lu_fid fid;
 716
 717                 fid_le_to_cpu(&fid, &lmm1->lmv_stripe_fids[i]);
 718                 CDEBUG(level, "idx %u subobj "DFID"\n", i, PFID(&fid));
 719         }
 720 }
 721
 722 /* Shrink and/or grow reply buffers */
 723 int mdt_fix_reply(struct mdt_thread_info *info)
 724 {
 725         struct req_capsule *pill = info->mti_pill;
 726         struct mdt_body    *body;
 727         int                md_size, md_packed = 0;
 728         int                acl_size;
 729         int                rc = 0;
 730         ENTRY;
 731
 732         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 733         LASSERT(body != NULL);
 734
 735         if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE |
 736                                OBD_MD_LINKNAME))
 737                 md_size = body->mbo_eadatasize;
 738         else
 739                 md_size = 0;
 740
 741         acl_size = body->mbo_aclsize;
 742
 743         /* this replay - not send info to client */
 744         if (info->mti_spec.no_create) {
 745                 md_size = 0;
 746                 acl_size = 0;
 747         }
 748
 749         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d\n",
 750                md_size, acl_size);
 751 /*
 752             &RMF_MDT_BODY,
 753             &RMF_MDT_MD,
 754             &RMF_ACL, or &RMF_LOGCOOKIES
 755 (optional)  &RMF_CAPA1,
 756 (optional)  &RMF_CAPA2,
 757 (optional)  something else
 758 */
 759
 760         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 761          * buffers before growing it */
 762         if (info->mti_big_lmm_used) {
 763                 /* big_lmm buffer may be used even without packing the result
 764                  * into reply, just for internal server needs */
 765                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 766                         md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 767                                                          RCL_SERVER);
 768
 769                 /* free big lmm if md_size is not needed */
 770                 if (md_size == 0 || md_packed == 0) {
 771                         info->mti_big_lmm_used = 0;
 772                 } else {
 773                         /* buffer must be allocated separately */
 774                         LASSERT(info->mti_attr.ma_lmm !=
 775                                 req_capsule_server_get(pill, &RMF_MDT_MD));
 776                         req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 777                 }
 778         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 779                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 780         }
 781
 782         if (info->mti_big_acl_used) {
 783                 if (acl_size == 0)
 784                         info->mti_big_acl_used = 0;
 785                 else
 786                         req_capsule_shrink(pill, &RMF_ACL, 0, RCL_SERVER);
 787         } else if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER)) {
 788                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 789         } else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER)) {
 790                 req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
 791         }
 792
 793         /* Shrink optional SECCTX buffer if it is not used */
 794         if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
 795             req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0 &&
 796             !(body->mbo_valid & OBD_MD_SECCTX))
 797                 req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0, RCL_SERVER);
 798
 799         /*
 800          * Some more field should be shrinked if needed.
 801          * This should be done by those who added fields to reply message.
 802          */
 803
 804         /* Grow MD buffer if needed finally */
 805         if (info->mti_big_lmm_used) {
 806                 void *lmm;
 807
 808                 LASSERT(md_size > md_packed);
 809                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 810                        md_size - md_packed);
 811                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 812                 if (rc) {
 813                         /* we can't answer with proper LOV EA, drop flags,
 814                          * the rc is also returned so this request is
 815                          * considered as failed */
 816                         body->mbo_valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 817                         /* don't return transno along with error */
 818                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 819                 } else {
 820                         /* now we need to pack right LOV/LMV EA */
 821                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 822                         if (info->mti_attr.ma_valid & MA_LOV) {
 823                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 824                                                              RCL_SERVER) ==
 825                                                 info->mti_attr.ma_lmm_size);
 826                                 memcpy(lmm, info->mti_attr.ma_lmm,
 827                                        info->mti_attr.ma_lmm_size);
 828                         } else if (info->mti_attr.ma_valid & MA_LMV) {
 829                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 830                                                              RCL_SERVER) ==
 831                                                 info->mti_attr.ma_lmv_size);
 832                                 memcpy(lmm, info->mti_attr.ma_lmv,
 833                                        info->mti_attr.ma_lmv_size);
 834                         }
 835                 }
 836
 837                 /* update mdt_max_mdsize so clients will be aware about that */
 838                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 839                         info->mti_mdt->mdt_max_mdsize =
 840                                                 info->mti_attr.ma_lmm_size;
 841                 info->mti_big_lmm_used = 0;
 842         }
 843
 844         if (info->mti_big_acl_used) {
 845                 CDEBUG(D_INFO, "Enlarge reply ACL buffer to %d bytes\n",
 846                        acl_size);
 847
 848                 rc = req_capsule_server_grow(pill, &RMF_ACL, acl_size);
 849                 if (rc) {
 850                         body->mbo_valid &= ~OBD_MD_FLACL;
 851                 } else {
 852                         void *acl = req_capsule_server_get(pill, &RMF_ACL);
 853
 854                         memcpy(acl, info->mti_big_acl, acl_size);
 855                 }
 856
 857                 info->mti_big_acl_used = 0;
 858         }
 859
 860         RETURN(rc);
 861 }
 862
 863
 864 /* if object is dying, pack the lov/llog data,
 865  * parameter info->mti_attr should be valid at this point!
 866  * Also implements RAoLU policy */
 867 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 868                            struct md_attr *ma)
 869 {
 870         struct mdt_body *repbody = NULL;
 871         const struct lu_attr *la = &ma->ma_attr;
 872         struct coordinator *cdt = &info->mti_mdt->mdt_coordinator;
 873         int rc;
 874         __u64 need = 0;
 875         struct hsm_action_item hai = {
 876                 .hai_len = sizeof(hai),
 877                 .hai_action = HSMA_REMOVE,
 878                 .hai_extent.length = -1,
 879                 .hai_cookie = 0,
 880                 .hai_gid = 0,
 881         };
 882         int archive_id;
 883
 884         ENTRY;
 885
 886         if (mdt_info_req(info) != NULL) {
 887                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 888                 LASSERT(repbody != NULL);
 889         } else {
 890                 CDEBUG(D_INFO, "not running in a request/reply context\n");
 891         }
 892
 893         if ((ma->ma_valid & MA_INODE) && repbody != NULL)
 894                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 895
 896         if (ma->ma_valid & MA_LOV) {
 897                 CERROR("No need in LOV EA upon unlink\n");
 898                 dump_stack();
 899         }
 900         if (repbody != NULL)
 901                 repbody->mbo_eadatasize = 0;
 902
 903         /* Only check unlinked and archived if RAoLU and upon last close */
 904         if (!cdt->cdt_remove_archive_on_last_unlink ||
 905             atomic_read(&mo->mot_open_count) != 0)
 906                 RETURN(0);
 907
 908         /* mdt_attr_get_complex will clear ma_valid, so check here first */
 909         if ((ma->ma_valid & MA_INODE) && (ma->ma_attr.la_nlink != 0))
 910                 RETURN(0);
 911
 912         if ((ma->ma_valid & MA_HSM) && (!(ma->ma_hsm.mh_flags & HS_EXISTS)))
 913                 RETURN(0);
 914
 915         need |= (MA_INODE | MA_HSM) & ~ma->ma_valid;
 916         if (need != 0) {
 917                 /* ma->ma_valid is missing either MA_INODE, MA_HSM, or both,
 918                  * try setting them */
 919                 ma->ma_need |= need;
 920                 rc = mdt_attr_get_complex(info, mo, ma);
 921                 if (rc) {
 922                         CERROR("%s: unable to fetch missing attributes of"
 923                                DFID": rc=%d\n", mdt_obd_name(info->mti_mdt),
 924                                PFID(mdt_object_fid(mo)), rc);
 925                         RETURN(0);
 926                 }
 927
 928                 if (need & MA_INODE) {
 929                         if (ma->ma_valid & MA_INODE) {
 930                                 if (ma->ma_attr.la_nlink != 0)
 931                                         RETURN(0);
 932                         } else {
 933                                 RETURN(0);
 934                         }
 935                 }
 936
 937                 if (need & MA_HSM) {
 938                         if (ma->ma_valid & MA_HSM) {
 939                                 if (!(ma->ma_hsm.mh_flags & HS_EXISTS))
 940                                         RETURN(0);
 941                         } else {
 942                                 RETURN(0);
 943                         }
 944                 }
 945         }
 946
 947         /* RAoLU policy is active, last close on file has occured,
 948          * file is unlinked, file is archived, so create remove request
 949          * for copytool!
 950          * If CDT is not running, requests will be logged for later. */
 951         if (ma->ma_hsm.mh_arch_id != 0)
 952                 archive_id = ma->ma_hsm.mh_arch_id;
 953         else
 954                 archive_id = cdt->cdt_default_archive_id;
 955
 956         hai.hai_fid = *mdt_object_fid(mo);
 957
 958         rc = mdt_agent_record_add(info->mti_env, info->mti_mdt, archive_id, 0,
 959                                   &hai);
 960         if (rc)
 961                 CERROR("%s: unable to add HSM remove request for "DFID
 962                        ": rc=%d\n", mdt_obd_name(info->mti_mdt),
 963                        PFID(mdt_object_fid(mo)), rc);
 964
 965         RETURN(0);
 966 }
 967
 968 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 969                                   struct md_attr *ma)
 970 {
 971         __u64 out;
 972
 973         out = 0;
 974         if (in & MDS_ATTR_MODE)
 975                 out |= LA_MODE;
 976         if (in & MDS_ATTR_UID)
 977                 out |= LA_UID;
 978         if (in & MDS_ATTR_GID)
 979                 out |= LA_GID;
 980         if (in & MDS_ATTR_SIZE)
 981                 out |= LA_SIZE;
 982         if (in & MDS_ATTR_BLOCKS)
 983                 out |= LA_BLOCKS;
 984         if (in & MDS_ATTR_ATIME_SET)
 985                 out |= LA_ATIME;
 986         if (in & MDS_ATTR_CTIME_SET)
 987                 out |= LA_CTIME;
 988         if (in & MDS_ATTR_MTIME_SET)
 989                 out |= LA_MTIME;
 990         if (in & MDS_ATTR_ATTR_FLAG)
 991                 out |= LA_FLAGS;
 992         if (in & MDS_ATTR_KILL_SUID)
 993                 out |= LA_KILL_SUID;
 994         if (in & MDS_ATTR_KILL_SGID)
 995                 out |= LA_KILL_SGID;
 996         if (in & MDS_ATTR_PROJID)
 997                 out |= LA_PROJID;
 998         if (in & MDS_ATTR_LSIZE)
 999                 out |= LA_LSIZE;
1000         if (in & MDS_ATTR_LBLOCKS)
1001                 out |= LA_LBLOCKS;
1002
1003         if (in & MDS_ATTR_FROM_OPEN)
1004                 rr->rr_flags |= MRF_OPEN_TRUNC;
1005         if (in & MDS_ATTR_OVERRIDE)
1006                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
1007         if (in & MDS_ATTR_FORCE)
1008                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
1009
1010         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID | MDS_ATTR_PROJID |
1011                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
1012                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
1013                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
1014                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
1015                 MDS_ATTR_FROM_OPEN | MDS_ATTR_LSIZE | MDS_ATTR_LBLOCKS |
1016                 MDS_ATTR_OVERRIDE);
1017         if (in != 0)
1018                 CDEBUG(D_INFO, "Unknown attr bits: %#llx\n", in);
1019         return out;
1020 }
1021
1022 /* unpacking */
1023
1024 int mdt_name_unpack(struct req_capsule *pill,
1025                     const struct req_msg_field *field,
1026                     struct lu_name *ln,
1027                     enum mdt_name_flags flags)
1028 {
1029         ln->ln_name = req_capsule_client_get(pill, field);
1030         ln->ln_namelen = req_capsule_get_size(pill, field, RCL_CLIENT) - 1;
1031
1032         if (!lu_name_is_valid(ln)) {
1033                 ln->ln_name = NULL;
1034                 ln->ln_namelen = 0;
1035
1036                 return -EPROTO;
1037         }
1038
1039         if ((flags & MNF_FIX_ANON) &&
1040             ln->ln_namelen == 1 && ln->ln_name[0] == '/') {
1041                 /* Newer (3.x) kernels use a name of "/" for the
1042                  * "anonymous" disconnected dentries from NFS
1043                  * filehandle conversion. See d_obtain_alias(). */
1044                 ln->ln_name = NULL;
1045                 ln->ln_namelen = 0;
1046         }
1047
1048         return 0;
1049 }
1050
1051 static int mdt_file_secctx_unpack(struct req_capsule *pill,
1052                                   const char **secctx_name,
1053                                   void **secctx, size_t *secctx_size)
1054 {
1055         const char *name;
1056         size_t name_size;
1057
1058         *secctx_name = NULL;
1059         *secctx = NULL;
1060         *secctx_size = 0;
1061
1062         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT) ||
1063             !req_capsule_field_present(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT))
1064                 return 0;
1065
1066         name_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
1067                                          RCL_CLIENT);
1068         if (name_size == 0)
1069                 return 0;
1070
1071         name = req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1072         if (strnlen(name, name_size) != name_size - 1)
1073                 return -EPROTO;
1074
1075         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_CLIENT) ||
1076             !req_capsule_field_present(pill, &RMF_FILE_SECCTX, RCL_CLIENT))
1077                 return -EPROTO;
1078
1079         *secctx_name = name;
1080         *secctx = req_capsule_client_get(pill, &RMF_FILE_SECCTX);
1081         *secctx_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_CLIENT);
1082
1083         return 0;
1084 }
1085
1086 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
1087 {
1088         struct lu_ucred *uc = mdt_ucred(info);
1089         struct md_attr *ma = &info->mti_attr;
1090         struct lu_attr *la = &ma->ma_attr;
1091         struct req_capsule *pill = info->mti_pill;
1092         struct mdt_reint_record *rr = &info->mti_rr;
1093         struct mdt_rec_setattr *rec;
1094         struct lu_nodemap *nodemap;
1095
1096         ENTRY;
1097
1098         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1099         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1100         if (rec == NULL)
1101                 RETURN(-EFAULT);
1102
1103         /* This prior initialization is needed for old_init_ucred_reint() */
1104         uc->uc_fsuid = rec->sa_fsuid;
1105         uc->uc_fsgid = rec->sa_fsgid;
1106         uc->uc_cap   = rec->sa_cap;
1107         uc->uc_suppgids[0] = rec->sa_suppgid;
1108         uc->uc_suppgids[1] = -1;
1109
1110         rr->rr_fid1 = &rec->sa_fid;
1111         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
1112         la->la_mode  = rec->sa_mode;
1113         la->la_flags = rec->sa_attr_flags;
1114
1115         nodemap = nodemap_get_from_exp(info->mti_exp);
1116         if (IS_ERR(nodemap))
1117                 RETURN(PTR_ERR(nodemap));
1118
1119         la->la_uid   = nodemap_map_id(nodemap, NODEMAP_UID,
1120                                       NODEMAP_CLIENT_TO_FS, rec->sa_uid);
1121         la->la_gid   = nodemap_map_id(nodemap, NODEMAP_GID,
1122                                       NODEMAP_CLIENT_TO_FS, rec->sa_gid);
1123         la->la_projid = rec->sa_projid;
1124         nodemap_putref(nodemap);
1125
1126         la->la_size  = rec->sa_size;
1127         la->la_blocks = rec->sa_blocks;
1128         la->la_ctime = rec->sa_ctime;
1129         la->la_atime = rec->sa_atime;
1130         la->la_mtime = rec->sa_mtime;
1131         ma->ma_valid = MA_INODE;
1132
1133         ma->ma_attr_flags |= rec->sa_bias & (MDS_CLOSE_INTENT |
1134                                 MDS_DATA_MODIFIED | MDS_TRUNC_KEEP_LEASE);
1135         RETURN(0);
1136 }
1137
1138 static int mdt_close_handle_unpack(struct mdt_thread_info *info)
1139 {
1140         struct req_capsule *pill = info->mti_pill;
1141         struct mdt_ioepoch *ioepoch;
1142         ENTRY;
1143
1144         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
1145                 ioepoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
1146         else
1147                 ioepoch = NULL;
1148
1149         if (ioepoch == NULL)
1150                 RETURN(-EPROTO);
1151
1152         info->mti_open_handle = ioepoch->mio_open_handle;
1153
1154         RETURN(0);
1155 }
1156
1157 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
1158         struct req_capsule      *pill = info->mti_pill;
1159
1160         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
1161                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
1162                 if (info->mti_dlm_req == NULL)
1163                         RETURN(-EFAULT);
1164         }
1165
1166         RETURN(0);
1167 }
1168
1169 static int mdt_setattr_unpack(struct mdt_thread_info *info)
1170 {
1171         struct mdt_reint_record *rr = &info->mti_rr;
1172         struct md_attr          *ma = &info->mti_attr;
1173         struct req_capsule      *pill = info->mti_pill;
1174         int rc;
1175         ENTRY;
1176
1177         rc = mdt_setattr_unpack_rec(info);
1178         if (rc)
1179                 RETURN(rc);
1180
1181         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1182                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1183                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1184                                                         RCL_CLIENT);
1185
1186                 if (rr->rr_eadatalen > 0) {
1187                         const struct lmv_user_md        *lum;
1188
1189                         lum = rr->rr_eadata;
1190                         /* Sigh ma_valid(from req) does not indicate whether
1191                          * it will set LOV/LMV EA, so we have to check magic */
1192                         if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
1193                                 ma->ma_valid |= MA_LMV;
1194                                 ma->ma_lmv = (void *)rr->rr_eadata;
1195                                 ma->ma_lmv_size = rr->rr_eadatalen;
1196                         } else {
1197                                 ma->ma_valid |= MA_LOV;
1198                                 ma->ma_lmm = (void *)rr->rr_eadata;
1199                                 ma->ma_lmm_size = rr->rr_eadatalen;
1200                         }
1201                 }
1202         }
1203
1204         rc = mdt_dlmreq_unpack(info);
1205         RETURN(rc);
1206 }
1207
1208 static int mdt_close_intent_unpack(struct mdt_thread_info *info)
1209 {
1210         struct md_attr          *ma = &info->mti_attr;
1211         struct req_capsule      *pill = info->mti_pill;
1212         ENTRY;
1213
1214         if (!(ma->ma_attr_flags & MDS_CLOSE_INTENT))
1215                 RETURN(0);
1216
1217         req_capsule_extend(pill, &RQF_MDS_CLOSE_INTENT);
1218
1219         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
1220             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
1221                 RETURN(-EFAULT);
1222
1223         RETURN(0);
1224 }
1225
1226 int mdt_close_unpack(struct mdt_thread_info *info)
1227 {
1228         int rc;
1229         ENTRY;
1230
1231         rc = mdt_close_handle_unpack(info);
1232         if (rc)
1233                 RETURN(rc);
1234
1235         rc = mdt_setattr_unpack_rec(info);
1236         if (rc)
1237                 RETURN(rc);
1238
1239         rc = mdt_close_intent_unpack(info);
1240         if (rc)
1241                 RETURN(rc);
1242
1243         RETURN(mdt_init_ucred_reint(info));
1244 }
1245
1246 static int mdt_create_unpack(struct mdt_thread_info *info)
1247 {
1248         struct lu_ucred *uc  = mdt_ucred(info);
1249         struct mdt_rec_create *rec;
1250         struct lu_attr *attr = &info->mti_attr.ma_attr;
1251         struct mdt_reint_record *rr = &info->mti_rr;
1252         struct req_capsule      *pill = info->mti_pill;
1253         struct md_op_spec       *sp = &info->mti_spec;
1254         int rc;
1255
1256         ENTRY;
1257
1258         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1259         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1260         if (rec == NULL)
1261                 RETURN(-EFAULT);
1262
1263         /* This prior initialization is needed for old_init_ucred_reint() */
1264         uc->uc_fsuid = rec->cr_fsuid;
1265         uc->uc_fsgid = rec->cr_fsgid;
1266         uc->uc_cap   = rec->cr_cap;
1267         uc->uc_suppgids[0] = rec->cr_suppgid1;
1268         uc->uc_suppgids[1] = -1;
1269         uc->uc_umask = rec->cr_umask;
1270
1271         rr->rr_fid1 = &rec->cr_fid1;
1272         rr->rr_fid2 = &rec->cr_fid2;
1273         attr->la_mode = rec->cr_mode;
1274         attr->la_rdev  = rec->cr_rdev;
1275         attr->la_uid   = rec->cr_fsuid;
1276         attr->la_gid   = rec->cr_fsgid;
1277         attr->la_ctime = rec->cr_time;
1278         attr->la_mtime = rec->cr_time;
1279         attr->la_atime = rec->cr_time;
1280         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
1281                          LA_CTIME | LA_MTIME | LA_ATIME;
1282         memset(&sp->u, 0, sizeof(sp->u));
1283         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1284
1285         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1286         if (rc < 0)
1287                 RETURN(rc);
1288
1289         if (S_ISLNK(attr->la_mode)) {
1290                 const char *tgt = NULL;
1291
1292                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1293                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
1294                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1295                         sp->u.sp_symname = tgt;
1296                 }
1297                 if (tgt == NULL)
1298                         RETURN(-EFAULT);
1299         } else {
1300                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_ACL);
1301                 if (S_ISDIR(attr->la_mode) &&
1302                     req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
1303                         sp->u.sp_ea.eadata =
1304                                 req_capsule_client_get(pill, &RMF_EADATA);
1305                         sp->u.sp_ea.eadatalen =
1306                                 req_capsule_get_size(pill, &RMF_EADATA,
1307                                                      RCL_CLIENT);
1308                         sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
1309                 }
1310         }
1311
1312         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1313                                     &sp->sp_cr_file_secctx,
1314                                     &sp->sp_cr_file_secctx_size);
1315         if (rc < 0)
1316                 RETURN(rc);
1317
1318         rc = req_check_sepol(pill);
1319         if (rc)
1320                 RETURN(rc);
1321
1322         rc = mdt_dlmreq_unpack(info);
1323         RETURN(rc);
1324 }
1325
1326 static int mdt_link_unpack(struct mdt_thread_info *info)
1327 {
1328         struct lu_ucred *uc  = mdt_ucred(info);
1329         struct mdt_rec_link *rec;
1330         struct lu_attr *attr = &info->mti_attr.ma_attr;
1331         struct mdt_reint_record *rr = &info->mti_rr;
1332         struct req_capsule *pill = info->mti_pill;
1333         int rc;
1334
1335         ENTRY;
1336
1337         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1338         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1339         if (rec == NULL)
1340                 RETURN(-EFAULT);
1341
1342         /* This prior initialization is needed for old_init_ucred_reint() */
1343         uc->uc_fsuid = rec->lk_fsuid;
1344         uc->uc_fsgid = rec->lk_fsgid;
1345         uc->uc_cap   = rec->lk_cap;
1346         uc->uc_suppgids[0] = rec->lk_suppgid1;
1347         uc->uc_suppgids[1] = rec->lk_suppgid2;
1348
1349         attr->la_uid = rec->lk_fsuid;
1350         attr->la_gid = rec->lk_fsgid;
1351         rr->rr_fid1 = &rec->lk_fid1;
1352         rr->rr_fid2 = &rec->lk_fid2;
1353         attr->la_ctime = rec->lk_time;
1354         attr->la_mtime = rec->lk_time;
1355         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1356
1357         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1358         if (rc < 0)
1359                 RETURN(rc);
1360
1361         rc = req_check_sepol(pill);
1362         if (rc)
1363                 RETURN(rc);
1364
1365         rc = mdt_dlmreq_unpack(info);
1366
1367         RETURN(rc);
1368 }
1369
1370 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1371 {
1372         struct lu_ucred *uc  = mdt_ucred(info);
1373         struct mdt_rec_unlink *rec;
1374         struct lu_attr *attr = &info->mti_attr.ma_attr;
1375         struct mdt_reint_record *rr = &info->mti_rr;
1376         struct req_capsule      *pill = info->mti_pill;
1377         int rc;
1378
1379         ENTRY;
1380
1381         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1382         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1383         if (rec == NULL)
1384                 RETURN(-EFAULT);
1385
1386         /* This prior initialization is needed for old_init_ucred_reint() */
1387         uc->uc_fsuid = rec->ul_fsuid;
1388         uc->uc_fsgid = rec->ul_fsgid;
1389         uc->uc_cap   = rec->ul_cap;
1390         uc->uc_suppgids[0] = rec->ul_suppgid1;
1391         uc->uc_suppgids[1] = -1;
1392
1393         attr->la_uid = rec->ul_fsuid;
1394         attr->la_gid = rec->ul_fsgid;
1395         rr->rr_fid1 = &rec->ul_fid1;
1396         rr->rr_fid2 = &rec->ul_fid2;
1397         attr->la_ctime = rec->ul_time;
1398         attr->la_mtime = rec->ul_time;
1399         attr->la_mode  = rec->ul_mode;
1400         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1401
1402         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1403         if (rc < 0)
1404                 RETURN(rc);
1405
1406         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1407
1408         rc = req_check_sepol(pill);
1409         if (rc)
1410                 RETURN(rc);
1411
1412         rc = mdt_dlmreq_unpack(info);
1413         RETURN(rc);
1414 }
1415
1416 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1417 {
1418         info->mti_spec.sp_rm_entry = 1;
1419         return mdt_unlink_unpack(info);
1420 }
1421
1422 static int mdt_rename_unpack(struct mdt_thread_info *info)
1423 {
1424         struct lu_ucred *uc = mdt_ucred(info);
1425         struct mdt_rec_rename *rec;
1426         struct lu_attr *attr = &info->mti_attr.ma_attr;
1427         struct mdt_reint_record *rr = &info->mti_rr;
1428         struct req_capsule *pill = info->mti_pill;
1429         struct md_op_spec *spec = &info->mti_spec;
1430         int rc;
1431
1432         ENTRY;
1433
1434         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1435         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1436         if (rec == NULL)
1437                 RETURN(-EFAULT);
1438
1439         /* This prior initialization is needed for old_init_ucred_reint() */
1440         uc->uc_fsuid = rec->rn_fsuid;
1441         uc->uc_fsgid = rec->rn_fsgid;
1442         uc->uc_cap   = rec->rn_cap;
1443         uc->uc_suppgids[0] = rec->rn_suppgid1;
1444         uc->uc_suppgids[1] = rec->rn_suppgid2;
1445
1446         attr->la_uid = rec->rn_fsuid;
1447         attr->la_gid = rec->rn_fsgid;
1448         rr->rr_fid1 = &rec->rn_fid1;
1449         rr->rr_fid2 = &rec->rn_fid2;
1450         attr->la_ctime = rec->rn_time;
1451         attr->la_mtime = rec->rn_time;
1452         /* rename_tgt contains the mode already */
1453         attr->la_mode = rec->rn_mode;
1454         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1455
1456         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1457         if (rc < 0)
1458                 RETURN(rc);
1459
1460         rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
1461         if (rc < 0)
1462                 RETURN(rc);
1463
1464         spec->no_create = !!req_is_replay(mdt_info_req(info));
1465
1466         rc = req_check_sepol(pill);
1467         if (rc)
1468                 RETURN(rc);
1469
1470         rc = mdt_dlmreq_unpack(info);
1471
1472         RETURN(rc);
1473 }
1474
1475 static int mdt_migrate_unpack(struct mdt_thread_info *info)
1476 {
1477         struct lu_ucred *uc = mdt_ucred(info);
1478         struct mdt_rec_rename *rec;
1479         struct lu_attr *attr = &info->mti_attr.ma_attr;
1480         struct mdt_reint_record *rr = &info->mti_rr;
1481         struct req_capsule *pill = info->mti_pill;
1482         struct md_op_spec *spec = &info->mti_spec;
1483         int rc;
1484
1485         ENTRY;
1486
1487         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1488         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1489         if (rec == NULL)
1490                 RETURN(-EFAULT);
1491
1492         /* This prior initialization is needed for old_init_ucred_reint() */
1493         uc->uc_fsuid = rec->rn_fsuid;
1494         uc->uc_fsgid = rec->rn_fsgid;
1495         uc->uc_cap   = rec->rn_cap;
1496         uc->uc_suppgids[0] = rec->rn_suppgid1;
1497         uc->uc_suppgids[1] = rec->rn_suppgid2;
1498
1499         attr->la_uid = rec->rn_fsuid;
1500         attr->la_gid = rec->rn_fsgid;
1501         rr->rr_fid1 = &rec->rn_fid1;
1502         rr->rr_fid2 = &rec->rn_fid2;
1503         attr->la_ctime = rec->rn_time;
1504         attr->la_mtime = rec->rn_time;
1505         /* rename_tgt contains the mode already */
1506         attr->la_mode = rec->rn_mode;
1507         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1508
1509         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1510         if (rc < 0)
1511                 RETURN(rc);
1512
1513         if (rec->rn_bias & MDS_CLOSE_MIGRATE) {
1514                 rc = mdt_close_handle_unpack(info);
1515                 if (rc)
1516                         RETURN(rc);
1517
1518                 spec->sp_migrate_close = 1;
1519         }
1520
1521         /* lustre version > 2.11 migration packs lum */
1522         if (req_capsule_has_field(pill, &RMF_EADATA, RCL_CLIENT)) {
1523                 if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1524                         rr->rr_eadatalen = req_capsule_get_size(pill,
1525                                                                 &RMF_EADATA,
1526                                                                 RCL_CLIENT);
1527
1528                         if (rr->rr_eadatalen > 0) {
1529                                 rr->rr_eadata = req_capsule_client_get(pill,
1530                                                                 &RMF_EADATA);
1531                                 spec->u.sp_ea.eadatalen = rr->rr_eadatalen;
1532                                 spec->u.sp_ea.eadata = rr->rr_eadata;
1533                                 spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
1534                         }
1535                 } else {
1536                         /* old client doesn't provide lum. */
1537                         RETURN(-EOPNOTSUPP);
1538                 }
1539         }
1540
1541         spec->no_create = !!req_is_replay(mdt_info_req(info));
1542
1543         rc = mdt_dlmreq_unpack(info);
1544
1545         RETURN(rc);
1546 }
1547
1548 /*
1549  * please see comment above LOV_MAGIC_V1_DEFINED
1550  */
1551 void mdt_fix_lov_magic(struct mdt_thread_info *info, void *eadata)
1552 {
1553         struct lov_user_md_v1   *v1 = eadata;
1554
1555         LASSERT(v1);
1556
1557         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1558                 if ((v1->lmm_magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
1559                         v1->lmm_magic |= LOV_MAGIC_DEFINED;
1560                 else if ((v1->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
1561                          __swab32(LOV_MAGIC_MAGIC))
1562                         v1->lmm_magic |= __swab32(LOV_MAGIC_DEFINED);
1563         }
1564 }
1565
1566 static int mdt_open_unpack(struct mdt_thread_info *info)
1567 {
1568         struct lu_ucred *uc = mdt_ucred(info);
1569         struct mdt_rec_create *rec;
1570         struct lu_attr *attr = &info->mti_attr.ma_attr;
1571         struct req_capsule *pill = info->mti_pill;
1572         struct mdt_reint_record *rr = &info->mti_rr;
1573         struct ptlrpc_request *req = mdt_info_req(info);
1574         struct md_op_spec *sp = &info->mti_spec;
1575         int rc;
1576         ENTRY;
1577
1578         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1579         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1580         if (rec == NULL)
1581                 RETURN(-EFAULT);
1582
1583         /* This prior initialization is needed for old_init_ucred_reint() */
1584         uc->uc_fsuid = rec->cr_fsuid;
1585         uc->uc_fsgid = rec->cr_fsgid;
1586         uc->uc_cap   = rec->cr_cap;
1587         uc->uc_suppgids[0] = rec->cr_suppgid1;
1588         uc->uc_suppgids[1] = rec->cr_suppgid2;
1589         uc->uc_umask = rec->cr_umask;
1590
1591         rr->rr_fid1   = &rec->cr_fid1;
1592         rr->rr_fid2   = &rec->cr_fid2;
1593         rr->rr_open_handle = &rec->cr_open_handle_old;
1594         attr->la_mode = rec->cr_mode;
1595         attr->la_rdev  = rec->cr_rdev;
1596         attr->la_uid   = rec->cr_fsuid;
1597         attr->la_gid   = rec->cr_fsgid;
1598         attr->la_ctime = rec->cr_time;
1599         attr->la_mtime = rec->cr_time;
1600         attr->la_atime = rec->cr_time;
1601         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1602                          LA_CTIME | LA_MTIME | LA_ATIME;
1603         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1604         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1605         /* Do not trigger ASSERTION if client miss to set such flags. */
1606         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1607                 RETURN(-EPROTO);
1608
1609         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1610
1611         mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);
1612
1613         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1614                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1615                                                         RCL_CLIENT);
1616
1617                 if (rr->rr_eadatalen > 0) {
1618                         rr->rr_eadata = req_capsule_client_get(pill,
1619                                                                &RMF_EADATA);
1620                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1621                         sp->u.sp_ea.eadata = rr->rr_eadata;
1622                         sp->no_create = !!req_is_replay(req);
1623                         mdt_fix_lov_magic(info, rr->rr_eadata);
1624                 }
1625
1626                 /*
1627                  * Client default md_size may be 0 right after client start,
1628                  * until all osc are connected, set here just some reasonable
1629                  * value to prevent misbehavior.
1630                  */
1631                 if (rr->rr_eadatalen == 0 &&
1632                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1633                         rr->rr_eadatalen = MIN_MD_SIZE;
1634         }
1635
1636         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1637                                     &sp->sp_cr_file_secctx,
1638                                     &sp->sp_cr_file_secctx_size);
1639         if (rc < 0)
1640                 RETURN(rc);
1641
1642         rc = req_check_sepol(pill);
1643         if (rc)
1644                 RETURN(rc);
1645
1646         RETURN(rc);
1647 }
1648
1649 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1650 {
1651         struct mdt_reint_record *rr = &info->mti_rr;
1652         struct lu_ucred *uc = mdt_ucred(info);
1653         struct lu_attr *attr = &info->mti_attr.ma_attr;
1654         struct req_capsule *pill = info->mti_pill;
1655         struct mdt_rec_setxattr *rec;
1656         int rc;
1657         ENTRY;
1658
1659
1660         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1661                  sizeof(struct mdt_rec_reint));
1662
1663         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1664         if (rec == NULL)
1665                 RETURN(-EFAULT);
1666
1667         /* This prior initialization is needed for old_init_ucred_reint() */
1668         uc->uc_fsuid  = rec->sx_fsuid;
1669         uc->uc_fsgid  = rec->sx_fsgid;
1670         uc->uc_cap    = rec->sx_cap;
1671         uc->uc_suppgids[0] = rec->sx_suppgid1;
1672         uc->uc_suppgids[1] = -1;
1673
1674         rr->rr_opcode = rec->sx_opcode;
1675         rr->rr_fid1   = &rec->sx_fid;
1676         attr->la_valid = rec->sx_valid;
1677         attr->la_ctime = rec->sx_time;
1678         attr->la_size = rec->sx_size;
1679         attr->la_flags = rec->sx_flags;
1680
1681         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1682         if (rc < 0)
1683                 RETURN(rc);
1684
1685         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1686                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1687                                                         RCL_CLIENT);
1688
1689                 if (rr->rr_eadatalen > info->mti_mdt->mdt_max_ea_size)
1690                         RETURN(-E2BIG);
1691
1692                 if (rr->rr_eadatalen > 0) {
1693                         rr->rr_eadata = req_capsule_client_get(pill,
1694                                                                &RMF_EADATA);
1695                         if (rr->rr_eadata == NULL)
1696                                 RETURN(-EFAULT);
1697                 } else {
1698                         rr->rr_eadata = NULL;
1699                 }
1700         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1701                 CDEBUG(D_INFO, "no xattr data supplied\n");
1702                 RETURN(-EFAULT);
1703         }
1704
1705         rc = req_check_sepol(pill);
1706         if (rc)
1707                 RETURN(rc);
1708
1709         if (mdt_dlmreq_unpack(info) < 0)
1710                 RETURN(-EPROTO);
1711
1712         RETURN(0);
1713 }
1714
1715 static int mdt_resync_unpack(struct mdt_thread_info *info)
1716 {
1717         struct req_capsule      *pill = info->mti_pill;
1718         struct mdt_reint_record *rr   = &info->mti_rr;
1719         struct lu_ucred         *uc     = mdt_ucred(info);
1720         struct mdt_rec_resync   *rec;
1721         ENTRY;
1722
1723         CLASSERT(sizeof(*rec) == sizeof(struct mdt_rec_reint));
1724         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1725         if (rec == NULL)
1726                 RETURN(-EFAULT);
1727
1728         /* This prior initialization is needed for old_init_ucred_reint() */
1729         uc->uc_fsuid = rec->rs_fsuid;
1730         uc->uc_fsgid = rec->rs_fsgid;
1731         uc->uc_cap   = rec->rs_cap;
1732
1733         rr->rr_fid1   = &rec->rs_fid;
1734         rr->rr_mirror_id = rec->rs_mirror_id;
1735
1736         /* cookie doesn't need to be swapped but it has been swapped
1737          * in lustre_swab_mdt_rec_reint() as rr_mtime, so here it needs
1738          * restoring. */
1739         if (ptlrpc_req_need_swab(mdt_info_req(info)))
1740                 __swab64s(&rec->rs_lease_handle.cookie);
1741         rr->rr_lease_handle = &rec->rs_lease_handle;
1742
1743         RETURN(mdt_dlmreq_unpack(info));
1744 }
1745
1746 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1747
1748 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1749         [REINT_SETATTR]  = mdt_setattr_unpack,
1750         [REINT_CREATE]   = mdt_create_unpack,
1751         [REINT_LINK]     = mdt_link_unpack,
1752         [REINT_UNLINK]   = mdt_unlink_unpack,
1753         [REINT_RENAME]   = mdt_rename_unpack,
1754         [REINT_OPEN]     = mdt_open_unpack,
1755         [REINT_SETXATTR] = mdt_setxattr_unpack,
1756         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1757         [REINT_MIGRATE]  = mdt_migrate_unpack,
1758         [REINT_RESYNC]   = mdt_resync_unpack,
1759 };
1760
1761 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1762 {
1763         int rc;
1764         ENTRY;
1765
1766         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1767         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1768                 info->mti_rr.rr_opcode = op;
1769                 rc = mdt_reint_unpackers[op](info);
1770         } else {
1771                 CERROR("Unexpected opcode %d\n", op);
1772                 rc = -EFAULT;
1773         }
1774         RETURN(rc);
1775 }
1776
1777 void mdt_pack_secctx_in_reply(struct mdt_thread_info *info,
1778                               struct mdt_object *child)
1779 {
1780         char *secctx_name;
1781         struct lu_buf *buffer;
1782         struct mdt_body *repbody;
1783         struct req_capsule *pill = info->mti_pill;
1784         int rc;
1785
1786         if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
1787             req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0) {
1788                 secctx_name =
1789                         req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1790                 buffer = &info->mti_buf;
1791
1792                 /* fill reply buffer with security context now */
1793                 buffer->lb_len = req_capsule_get_size(pill, &RMF_FILE_SECCTX,
1794                                                       RCL_SERVER);
1795                 buffer->lb_buf = req_capsule_server_get(info->mti_pill,
1796                                                         &RMF_FILE_SECCTX);
1797                 rc = mo_xattr_get(info->mti_env, mdt_object_child(child),
1798                                   buffer, secctx_name);
1799                 if (rc >= 0) {
1800                         CDEBUG(D_SEC,
1801                                "found security context of size %d for "DFID"\n",
1802                                rc, PFID(mdt_object_fid(child)));
1803
1804                         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1805                         repbody->mbo_valid |= OBD_MD_SECCTX;
1806                         if (rc < buffer->lb_len)
1807                                 req_capsule_shrink(pill, &RMF_FILE_SECCTX, rc,
1808                                                    RCL_SERVER);
1809                 } else {
1810                         CDEBUG(D_SEC,
1811                              "security context not found for "DFID": rc = %d\n",
1812                              PFID(mdt_object_fid(child)), rc);
1813                         req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0,
1814                                            RCL_SERVER);
1815                 }
1816         }
1817 }