lustre/mdt/mdt_lib.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/mdt/mdt_lib.c
  37  *
  38  * Lustre Metadata Target (mdt) request unpacking helper.
  39  *
  40  * Author: Peter Braam <braam@clusterfs.com>
  41  * Author: Andreas Dilger <adilger@clusterfs.com>
  42  * Author: Phil Schwan <phil@clusterfs.com>
  43  * Author: Mike Shaver <shaver@clusterfs.com>
  44  * Author: Nikita Danilov <nikita@clusterfs.com>
  45  * Author: Huang Hua <huanghua@clusterfs.com>
  46  * Author: Fan Yong <fanyong@clusterfs.com>
  47  */
  48
  49
  50 #ifndef EXPORT_SYMTAB
  51 # define EXPORT_SYMTAB
  52 #endif
  53 #define DEBUG_SUBSYSTEM S_MDS
  54
  55 #include "mdt_internal.h"
  56 #include <lnet/lib-lnet.h>
  57
  58
  59 typedef enum ucred_init_type {
  60         NONE_INIT       = 0,
  61         BODY_INIT       = 1,
  62         REC_INIT        = 2
  63 } ucred_init_type_t;
  64
  65 void mdt_exit_ucred(struct mdt_thread_info *info)
  66 {
  67         struct md_ucred   *uc  = mdt_ucred(info);
  68         struct mdt_device *mdt = info->mti_mdt;
  69
  70         if (uc->mu_valid != UCRED_INIT) {
  71                 uc->mu_suppgids[0] = uc->mu_suppgids[1] = -1;
  72                 if (uc->mu_ginfo) {
  73                         cfs_put_group_info(uc->mu_ginfo);
  74                         uc->mu_ginfo = NULL;
  75                 }
  76                 if (uc->mu_identity) {
  77                         mdt_identity_put(mdt->mdt_identity_cache,
  78                                          uc->mu_identity);
  79                         uc->mu_identity = NULL;
  80                 }
  81                 uc->mu_valid = UCRED_INIT;
  82         }
  83 }
  84
  85 static int match_nosquash_list(cfs_rw_semaphore_t *sem,
  86                                cfs_list_t *nidlist,
  87                                lnet_nid_t peernid)
  88 {
  89         int rc;
  90         ENTRY;
  91         cfs_down_read(sem);
  92         rc = cfs_match_nid(peernid, nidlist);
  93         cfs_up_read(sem);
  94         RETURN(rc);
  95 }
  96
  97 /* root_squash for inter-MDS operations */
  98 static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
  99 {
 100         struct md_ucred *ucred = mdt_ucred(info);
 101         ENTRY;
 102
 103         if (!info->mti_mdt->mdt_squash_uid || ucred->mu_fsuid)
 104                 RETURN(0);
 105
 106         if (match_nosquash_list(&info->mti_mdt->mdt_squash_sem,
 107                                 &info->mti_mdt->mdt_nosquash_nids,
 108                                 peernid)) {
 109                 CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
 110                        libcfs_nid2str(peernid));
 111                 RETURN(0);
 112         }
 113
 114         CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
 115                libcfs_nid2str(peernid),
 116                ucred->mu_fsuid, ucred->mu_fsgid, ucred->mu_cap,
 117                info->mti_mdt->mdt_squash_uid, info->mti_mdt->mdt_squash_gid,
 118                0);
 119
 120         ucred->mu_fsuid = info->mti_mdt->mdt_squash_uid;
 121         ucred->mu_fsgid = info->mti_mdt->mdt_squash_gid;
 122         ucred->mu_cap = 0;
 123         ucred->mu_suppgids[0] = -1;
 124         ucred->mu_suppgids[1] = -1;
 125
 126         RETURN(0);
 127 }
 128
 129 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 130                           void *buf)
 131 {
 132         struct ptlrpc_request   *req = mdt_info_req(info);
 133         struct mdt_device       *mdt = info->mti_mdt;
 134         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 135         struct md_ucred         *ucred = mdt_ucred(info);
 136         lnet_nid_t               peernid = req->rq_peer.nid;
 137         __u32                    perm = 0;
 138         __u32                    remote = exp_connect_rmtclient(info->mti_exp);
 139         int                      setuid;
 140         int                      setgid;
 141         int                      rc = 0;
 142
 143         ENTRY;
 144
 145         LASSERT(req->rq_auth_gss);
 146         LASSERT(!req->rq_auth_usr_mdt);
 147         LASSERT(req->rq_user_desc);
 148
 149         ucred->mu_valid = UCRED_INVALID;
 150
 151         ucred->mu_o_uid   = pud->pud_uid;
 152         ucred->mu_o_gid   = pud->pud_gid;
 153         ucred->mu_o_fsuid = pud->pud_fsuid;
 154         ucred->mu_o_fsgid = pud->pud_fsgid;
 155
 156         if (type == BODY_INIT) {
 157                 struct mdt_body *body = (struct mdt_body *)buf;
 158
 159                 ucred->mu_suppgids[0] = body->suppgid;
 160                 ucred->mu_suppgids[1] = -1;
 161         }
 162
 163         /* sanity check: we expect the uid which client claimed is true */
 164         if (remote) {
 165                 if (req->rq_auth_mapped_uid == INVALID_UID) {
 166                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
 167                         RETURN(-EACCES);
 168                 }
 169
 170                 if (ptlrpc_user_desc_do_idmap(req, pud))
 171                         RETURN(-EACCES);
 172
 173                 if (req->rq_auth_mapped_uid != pud->pud_uid) {
 174                         CDEBUG(D_SEC, "remote client %s: auth/mapped uid %u/%u "
 175                                "while client claims %u:%u/%u:%u\n",
 176                                libcfs_nid2str(peernid), req->rq_auth_uid,
 177                                req->rq_auth_mapped_uid,
 178                                pud->pud_uid, pud->pud_gid,
 179                                pud->pud_fsuid, pud->pud_fsgid);
 180                         RETURN(-EACCES);
 181                 }
 182         } else {
 183                 if (req->rq_auth_uid != pud->pud_uid) {
 184                         CDEBUG(D_SEC, "local client %s: auth uid %u "
 185                                "while client claims %u:%u/%u:%u\n",
 186                                libcfs_nid2str(peernid), req->rq_auth_uid,
 187                                pud->pud_uid, pud->pud_gid,
 188                                pud->pud_fsuid, pud->pud_fsgid);
 189                         RETURN(-EACCES);
 190                 }
 191         }
 192
 193         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 194                 if (remote) {
 195                         CDEBUG(D_SEC, "remote client must run with identity_get "
 196                                "enabled!\n");
 197                         RETURN(-EACCES);
 198                 } else {
 199                         ucred->mu_identity = NULL;
 200                         perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 201                                CFS_SETGRP_PERM;
 202                 }
 203         } else {
 204                 struct md_identity *identity;
 205
 206                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 207                                             pud->pud_uid);
 208                 if (IS_ERR(identity)) {
 209                         if (unlikely(PTR_ERR(identity) == -EREMCHG &&
 210                                      !remote)) {
 211                                 ucred->mu_identity = NULL;
 212                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 213                                        CFS_SETGRP_PERM;
 214                         } else {
 215                                 CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 216                                        pud->pud_uid);
 217                                 RETURN(-EACCES);
 218                         }
 219                 } else {
 220                         ucred->mu_identity = identity;
 221                         perm = mdt_identity_get_perm(ucred->mu_identity,
 222                                                      remote, peernid);
 223                 }
 224         }
 225
 226         /* find out the setuid/setgid attempt */
 227         setuid = (pud->pud_uid != pud->pud_fsuid);
 228         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 229                   (ucred->mu_identity &&
 230                   (pud->pud_gid != ucred->mu_identity->mi_gid)));
 231
 232         /* check permission of setuid */
 233         if (setuid && !(perm & CFS_SETUID_PERM)) {
 234                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 235                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 236                 GOTO(out, rc = -EACCES);
 237         }
 238
 239         /* check permission of setgid */
 240         if (setgid && !(perm & CFS_SETGID_PERM)) {
 241                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 242                        "from %s\n", pud->pud_uid, pud->pud_gid,
 243                        pud->pud_fsuid, pud->pud_fsgid,
 244                        ucred->mu_identity->mi_gid, libcfs_nid2str(peernid));
 245                 GOTO(out, rc = -EACCES);
 246         }
 247
 248         /*
 249          * NB: remote client not allowed to setgroups anyway.
 250          */
 251         if (!remote && perm & CFS_SETGRP_PERM) {
 252                 if (pud->pud_ngroups) {
 253                         /* setgroups for local client */
 254                         ucred->mu_ginfo = cfs_groups_alloc(pud->pud_ngroups);
 255                         if (!ucred->mu_ginfo) {
 256                                 CERROR("failed to alloc %d groups\n",
 257                                        pud->pud_ngroups);
 258                                 GOTO(out, rc = -ENOMEM);
 259                         }
 260
 261                         lustre_groups_from_list(ucred->mu_ginfo,
 262                                                 pud->pud_groups);
 263                         lustre_groups_sort(ucred->mu_ginfo);
 264                 } else {
 265                         ucred->mu_ginfo = NULL;
 266                 }
 267         } else {
 268                 ucred->mu_suppgids[0] = -1;
 269                 ucred->mu_suppgids[1] = -1;
 270                 ucred->mu_ginfo = NULL;
 271         }
 272
 273         ucred->mu_uid   = pud->pud_uid;
 274         ucred->mu_gid   = pud->pud_gid;
 275         ucred->mu_fsuid = pud->pud_fsuid;
 276         ucred->mu_fsgid = pud->pud_fsgid;
 277
 278         /* process root_squash here. */
 279         mdt_root_squash(info, peernid);
 280
 281         /* remove fs privilege for non-root user. */
 282         if (ucred->mu_fsuid)
 283                 ucred->mu_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
 284         else
 285                 ucred->mu_cap = pud->pud_cap;
 286         if (remote && !(perm & CFS_RMTOWN_PERM))
 287                 ucred->mu_cap &= ~(CFS_CAP_SYS_RESOURCE_MASK |
 288                                    CFS_CAP_CHOWN_MASK);
 289         ucred->mu_valid = UCRED_NEW;
 290
 291         EXIT;
 292
 293 out:
 294         if (rc) {
 295                 if (ucred->mu_ginfo) {
 296                         cfs_put_group_info(ucred->mu_ginfo);
 297                         ucred->mu_ginfo = NULL;
 298                 }
 299                 if (ucred->mu_identity) {
 300                         mdt_identity_put(mdt->mdt_identity_cache,
 301                                          ucred->mu_identity);
 302                         ucred->mu_identity = NULL;
 303                 }
 304         }
 305
 306         return rc;
 307 }
 308
 309 int mdt_check_ucred(struct mdt_thread_info *info)
 310 {
 311         struct ptlrpc_request   *req = mdt_info_req(info);
 312         struct mdt_device       *mdt = info->mti_mdt;
 313         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 314         struct md_ucred         *ucred = mdt_ucred(info);
 315         struct md_identity      *identity = NULL;
 316         lnet_nid_t               peernid = req->rq_peer.nid;
 317         __u32                    perm = 0;
 318         __u32                    remote = exp_connect_rmtclient(info->mti_exp);
 319         int                      setuid;
 320         int                      setgid;
 321         int                      rc = 0;
 322
 323         ENTRY;
 324
 325         if ((ucred->mu_valid == UCRED_OLD) || (ucred->mu_valid == UCRED_NEW))
 326                 RETURN(0);
 327
 328         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 329                 RETURN(0);
 330
 331         /* sanity check: if we use strong authentication, we expect the
 332          * uid which client claimed is true */
 333         if (remote) {
 334                 if (req->rq_auth_mapped_uid == INVALID_UID) {
 335                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
 336                         RETURN(-EACCES);
 337                 }
 338
 339                 if (ptlrpc_user_desc_do_idmap(req, pud))
 340                         RETURN(-EACCES);
 341
 342                 if (req->rq_auth_mapped_uid != pud->pud_uid) {
 343                         CDEBUG(D_SEC, "remote client %s: auth/mapped uid %u/%u "
 344                                "while client claims %u:%u/%u:%u\n",
 345                                libcfs_nid2str(peernid), req->rq_auth_uid,
 346                                req->rq_auth_mapped_uid,
 347                                pud->pud_uid, pud->pud_gid,
 348                                pud->pud_fsuid, pud->pud_fsgid);
 349                         RETURN(-EACCES);
 350                 }
 351         } else {
 352                 if (req->rq_auth_uid != pud->pud_uid) {
 353                         CDEBUG(D_SEC, "local client %s: auth uid %u "
 354                                "while client claims %u:%u/%u:%u\n",
 355                                libcfs_nid2str(peernid), req->rq_auth_uid,
 356                                pud->pud_uid, pud->pud_gid,
 357                                pud->pud_fsuid, pud->pud_fsgid);
 358                         RETURN(-EACCES);
 359                 }
 360         }
 361
 362         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 363                 if (remote) {
 364                         CDEBUG(D_SEC, "remote client must run with identity_get "
 365                                "enabled!\n");
 366                         RETURN(-EACCES);
 367                 }
 368                 RETURN(0);
 369         }
 370
 371         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 372         if (IS_ERR(identity)) {
 373                 if (unlikely(PTR_ERR(identity) == -EREMCHG &&
 374                              !remote)) {
 375                         RETURN(0);
 376                 } else {
 377                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 378                                pud->pud_uid);
 379                         RETURN(-EACCES);
 380                }
 381         }
 382
 383         perm = mdt_identity_get_perm(identity, remote, peernid);
 384         /* find out the setuid/setgid attempt */
 385         setuid = (pud->pud_uid != pud->pud_fsuid);
 386         setgid = (pud->pud_gid != pud->pud_fsgid ||
 387                   pud->pud_gid != identity->mi_gid);
 388
 389         /* check permission of setuid */
 390         if (setuid && !(perm & CFS_SETUID_PERM)) {
 391                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 392                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 393                 GOTO(out, rc = -EACCES);
 394         }
 395
 396         /* check permission of setgid */
 397         if (setgid && !(perm & CFS_SETGID_PERM)) {
 398                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 399                        "from %s\n", pud->pud_uid, pud->pud_gid,
 400                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 401                        libcfs_nid2str(peernid));
 402                 GOTO(out, rc = -EACCES);
 403         }
 404
 405         EXIT;
 406
 407 out:
 408         mdt_identity_put(mdt->mdt_identity_cache, identity);
 409         return rc;
 410 }
 411
 412 static int old_init_ucred(struct mdt_thread_info *info,
 413                           struct mdt_body *body)
 414 {
 415         struct md_ucred *uc = mdt_ucred(info);
 416         struct mdt_device  *mdt = info->mti_mdt;
 417         struct md_identity *identity = NULL;
 418
 419         ENTRY;
 420
 421         uc->mu_valid = UCRED_INVALID;
 422         uc->mu_o_uid = uc->mu_uid = body->uid;
 423         uc->mu_o_gid = uc->mu_gid = body->gid;
 424         uc->mu_o_fsuid = uc->mu_fsuid = body->fsuid;
 425         uc->mu_o_fsgid = uc->mu_fsgid = body->fsgid;
 426         uc->mu_suppgids[0] = body->suppgid;
 427         uc->mu_suppgids[1] = -1;
 428         uc->mu_ginfo = NULL;
 429         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 430                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 431                                             uc->mu_fsuid);
 432                 if (IS_ERR(identity)) {
 433                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 434                                 identity = NULL;
 435                         } else {
 436                                 CDEBUG(D_SEC, "Deny access without identity: "
 437                                        "uid %u\n", uc->mu_fsuid);
 438                                 RETURN(-EACCES);
 439                         }
 440                 }
 441         }
 442         uc->mu_identity = identity;
 443
 444         /* process root_squash here. */
 445         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 446
 447         /* remove fs privilege for non-root user. */
 448         if (uc->mu_fsuid)
 449                 uc->mu_cap = body->capability & ~CFS_CAP_FS_MASK;
 450         else
 451                 uc->mu_cap = body->capability;
 452         uc->mu_valid = UCRED_OLD;
 453
 454         RETURN(0);
 455 }
 456
 457 static int old_init_ucred_reint(struct mdt_thread_info *info)
 458 {
 459         struct md_ucred *uc = mdt_ucred(info);
 460         struct mdt_device  *mdt = info->mti_mdt;
 461         struct md_identity *identity = NULL;
 462
 463         ENTRY;
 464
 465         uc->mu_valid = UCRED_INVALID;
 466         uc->mu_o_uid = uc->mu_o_fsuid = uc->mu_uid = uc->mu_fsuid;
 467         uc->mu_o_gid = uc->mu_o_fsgid = uc->mu_gid = uc->mu_fsgid;
 468         uc->mu_ginfo = NULL;
 469         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 470                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 471                                             uc->mu_fsuid);
 472                 if (IS_ERR(identity)) {
 473                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 474                                 identity = NULL;
 475                         } else {
 476                                 CDEBUG(D_SEC, "Deny access without identity: "
 477                                        "uid %u\n", uc->mu_fsuid);
 478                                 RETURN(-EACCES);
 479                         }
 480                 }
 481         }
 482         uc->mu_identity = identity;
 483
 484         /* process root_squash here. */
 485         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 486
 487         /* remove fs privilege for non-root user. */
 488         if (uc->mu_fsuid)
 489                 uc->mu_cap &= ~CFS_CAP_FS_MASK;
 490         uc->mu_valid = UCRED_OLD;
 491
 492         RETURN(0);
 493 }
 494
 495 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 496 {
 497         struct ptlrpc_request *req = mdt_info_req(info);
 498         struct md_ucred       *uc  = mdt_ucred(info);
 499
 500         if ((uc->mu_valid == UCRED_OLD) || (uc->mu_valid == UCRED_NEW))
 501                 return 0;
 502
 503         mdt_exit_ucred(info);
 504
 505         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 506                 return old_init_ucred(info, body);
 507         else
 508                 return new_init_ucred(info, BODY_INIT, body);
 509 }
 510
 511 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 512 {
 513         struct ptlrpc_request *req = mdt_info_req(info);
 514         struct md_ucred       *uc  = mdt_ucred(info);
 515
 516         if ((uc->mu_valid == UCRED_OLD) || (uc->mu_valid == UCRED_NEW))
 517                 return 0;
 518
 519         mdt_exit_ucred(info);
 520
 521         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 522                 return old_init_ucred_reint(info);
 523         else
 524                 return new_init_ucred(info, REC_INIT, NULL);
 525 }
 526
 527 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 528 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm)
 529 {
 530         const struct lov_ost_data_v1 *lod;
 531         int i;
 532         __s16 stripe_count =
 533                 le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
 534
 535         CDEBUG(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
 536                le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
 537                le32_to_cpu(lmm->lmm_pattern));
 538         CDEBUG(level,"stripe_size=0x%x, stripe_count=0x%x\n",
 539                le32_to_cpu(lmm->lmm_stripe_size),
 540                le32_to_cpu(lmm->lmm_stripe_count));
 541         LASSERT(stripe_count <= (__s16)LOV_MAX_STRIPE_COUNT);
 542         for (i = 0, lod = lmm->lmm_objects; i < stripe_count; i++, lod++) {
 543                 CDEBUG(level, "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
 544                        i, le32_to_cpu(lod->l_ost_idx),
 545                        le64_to_cpu(lod->l_object_seq),
 546                        le64_to_cpu(lod->l_object_id));
 547         }
 548 }
 549
 550 void mdt_shrink_reply(struct mdt_thread_info *info)
 551 {
 552         struct req_capsule *pill = info->mti_pill;
 553         struct mdt_body    *body;
 554         int                md_size;
 555         int                acl_size;
 556         ENTRY;
 557
 558         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 559         LASSERT(body != NULL);
 560
 561         if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
 562                 md_size = body->eadatasize;
 563         else
 564                 md_size = 0;
 565
 566         acl_size = body->aclsize;
 567
 568         /* this replay - not send info to client */
 569         if (info->mti_spec.no_create == 1) {
 570                 md_size = 0;
 571                 acl_size = 0;
 572         }
 573
 574         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
 575                         " MDSCAPA = %llx, OSSCAPA = %llx\n",
 576                         md_size, acl_size,
 577                         (unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
 578                         (unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
 579 /*
 580             &RMF_MDT_BODY,
 581             &RMF_MDT_MD,
 582             &RMF_ACL, or &RMF_LOGCOOKIES
 583 (optional)  &RMF_CAPA1,
 584 (optional)  &RMF_CAPA2,
 585 (optional)  something else
 586 */
 587
 588         if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 589                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size,
 590                                    RCL_SERVER);
 591         if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
 592                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 593         else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
 594                 req_capsule_shrink(pill, &RMF_LOGCOOKIES,
 595                                    acl_size, RCL_SERVER);
 596
 597         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 598             !(body->valid & OBD_MD_FLMDSCAPA))
 599                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 600
 601         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 602             !(body->valid & OBD_MD_FLOSSCAPA))
 603                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 604
 605         /*
 606          * Some more field should be shrinked if needed.
 607          * This should be done by those who added fields to reply message.
 608          */
 609         EXIT;
 610 }
 611
 612
 613 /* if object is dying, pack the lov/llog data,
 614  * parameter info->mti_attr should be valid at this point! */
 615 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 616                            const struct md_attr *ma)
 617 {
 618         struct mdt_body       *repbody;
 619         const struct lu_attr *la = &ma->ma_attr;
 620         int rc;
 621         ENTRY;
 622
 623         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 624         LASSERT(repbody != NULL);
 625
 626         if (ma->ma_valid & MA_INODE)
 627                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 628
 629         if (ma->ma_valid & MA_LOV) {
 630                 __u32 mode;
 631
 632                 if (mdt_object_exists(mo) < 0)
 633                         /* If it is a remote object, and we do not retrieve
 634                          * EA back unlink reg file*/
 635                         mode = S_IFREG;
 636                 else
 637                         mode = lu_object_attr(&mo->mot_obj.mo_lu);
 638
 639                 LASSERT(ma->ma_lmm_size);
 640                 mdt_dump_lmm(D_INFO, ma->ma_lmm);
 641                 repbody->eadatasize = ma->ma_lmm_size;
 642                 if (S_ISREG(mode))
 643                         repbody->valid |= OBD_MD_FLEASIZE;
 644                 else if (S_ISDIR(mode))
 645                         repbody->valid |= OBD_MD_FLDIREA;
 646                 else
 647                         LBUG();
 648         }
 649
 650         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
 651                 repbody->aclsize = ma->ma_cookie_size;
 652                 repbody->valid |= OBD_MD_FLCOOKIE;
 653         }
 654
 655         if (info->mti_mdt->mdt_opts.mo_oss_capa &&
 656             info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA &&
 657             repbody->valid & OBD_MD_FLEASIZE) {
 658                 struct lustre_capa *capa;
 659
 660                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
 661                 LASSERT(capa);
 662                 capa->lc_opc = CAPA_OPC_OSS_DESTROY;
 663                 rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
 664                 if (rc)
 665                         RETURN(rc);
 666
 667                 repbody->valid |= OBD_MD_FLOSSCAPA;
 668         }
 669
 670         RETURN(0);
 671 }
 672
 673 static inline unsigned int attr_unpack(__u64 sa_valid) {
 674         unsigned int ia_valid = 0;
 675
 676         if (sa_valid & MDS_ATTR_MODE)
 677                 ia_valid |= ATTR_MODE;
 678         if (sa_valid & MDS_ATTR_UID)
 679                 ia_valid |= ATTR_UID;
 680         if (sa_valid & MDS_ATTR_GID)
 681                 ia_valid |= ATTR_GID;
 682         if (sa_valid & MDS_ATTR_SIZE)
 683                 ia_valid |= ATTR_SIZE;
 684         if (sa_valid & MDS_ATTR_ATIME)
 685                 ia_valid |= ATTR_ATIME;
 686         if (sa_valid & MDS_ATTR_MTIME)
 687                 ia_valid |= ATTR_MTIME;
 688         if (sa_valid & MDS_ATTR_CTIME)
 689                 ia_valid |= ATTR_CTIME;
 690         if (sa_valid & MDS_ATTR_ATIME_SET)
 691                 ia_valid |= ATTR_ATIME_SET;
 692         if (sa_valid & MDS_ATTR_MTIME_SET)
 693                 ia_valid |= ATTR_MTIME_SET;
 694         if (sa_valid & MDS_ATTR_FORCE)
 695                 ia_valid |= ATTR_FORCE;
 696         if (sa_valid & MDS_ATTR_ATTR_FLAG)
 697                 ia_valid |= ATTR_ATTR_FLAG;
 698         if (sa_valid & MDS_ATTR_KILL_SUID)
 699                 ia_valid |=  ATTR_KILL_SUID;
 700         if (sa_valid & MDS_ATTR_KILL_SGID)
 701                 ia_valid |= ATTR_KILL_SGID;
 702         if (sa_valid & MDS_ATTR_CTIME_SET)
 703                 ia_valid |= ATTR_CTIME_SET;
 704         if (sa_valid & MDS_ATTR_FROM_OPEN)
 705                 ia_valid |= ATTR_FROM_OPEN;
 706         if (sa_valid & MDS_ATTR_BLOCKS)
 707                 ia_valid |= ATTR_BLOCKS;
 708         if (sa_valid & MDS_OPEN_OWNEROVERRIDE)
 709                 ia_valid |= MDS_OPEN_OWNEROVERRIDE;
 710         return ia_valid;
 711 }
 712
 713 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 714                                   struct md_attr *ma)
 715 {
 716         __u64 out;
 717
 718         out = 0;
 719         if (in & ATTR_MODE)
 720                 out |= LA_MODE;
 721         if (in & ATTR_UID)
 722                 out |= LA_UID;
 723         if (in & ATTR_GID)
 724                 out |= LA_GID;
 725         if (in & ATTR_SIZE)
 726                 out |= LA_SIZE;
 727         if (in & ATTR_BLOCKS)
 728                 out |= LA_BLOCKS;
 729
 730         if (in & ATTR_FROM_OPEN)
 731                 rr->rr_flags |= MRF_SETATTR_LOCKED;
 732
 733         if (in & ATTR_ATIME_SET)
 734                 out |= LA_ATIME;
 735
 736         if (in & ATTR_CTIME_SET)
 737                 out |= LA_CTIME;
 738
 739         if (in & ATTR_MTIME_SET)
 740                 out |= LA_MTIME;
 741
 742         if (in & ATTR_ATTR_FLAG)
 743                 out |= LA_FLAGS;
 744
 745         if (in & ATTR_KILL_SUID)
 746                 out |= LA_KILL_SUID;
 747
 748         if (in & ATTR_KILL_SGID)
 749                 out |= LA_KILL_SGID;
 750
 751         if (in & MDS_OPEN_OWNEROVERRIDE)
 752                 ma->ma_attr_flags |= MDS_OPEN_OWNEROVERRIDE;
 753
 754         if (in & ATTR_FORCE)
 755                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 756
 757         /*XXX need ATTR_RAW?*/
 758         in &= ~(ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_BLOCKS|
 759                 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME|ATTR_FROM_OPEN|
 760                 ATTR_ATIME_SET|ATTR_CTIME_SET|ATTR_MTIME_SET|
 761                 ATTR_ATTR_FLAG|ATTR_RAW|MDS_OPEN_OWNEROVERRIDE|
 762                 ATTR_FORCE|ATTR_KILL_SUID|ATTR_KILL_SGID);
 763         if (in != 0)
 764                 CERROR("Unknown attr bits: "LPX64"\n", in);
 765         return out;
 766 }
 767 /* unpacking */
 768
 769 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
 770 {
 771         struct md_ucred         *uc  = mdt_ucred(info);
 772         struct md_attr          *ma = &info->mti_attr;
 773         struct lu_attr          *la = &ma->ma_attr;
 774         struct req_capsule      *pill = info->mti_pill;
 775         struct mdt_reint_record *rr = &info->mti_rr;
 776         struct mdt_rec_setattr  *rec;
 777         ENTRY;
 778
 779         CLASSERT(sizeof(struct mdt_rec_setattr)== sizeof(struct mdt_rec_reint));
 780         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 781         if (rec == NULL)
 782                 RETURN(-EFAULT);
 783
 784         uc->mu_fsuid = rec->sa_fsuid;
 785         uc->mu_fsgid = rec->sa_fsgid;
 786         uc->mu_cap   = rec->sa_cap;
 787         uc->mu_suppgids[0] = rec->sa_suppgid;
 788         uc->mu_suppgids[1] = -1;
 789
 790         rr->rr_fid1 = &rec->sa_fid;
 791         la->la_valid = mdt_attr_valid_xlate(attr_unpack(rec->sa_valid), rr, ma);
 792         la->la_mode  = rec->sa_mode;
 793         la->la_flags = rec->sa_attr_flags;
 794         la->la_uid   = rec->sa_uid;
 795         la->la_gid   = rec->sa_gid;
 796         la->la_size  = rec->sa_size;
 797         la->la_blocks = rec->sa_blocks;
 798         la->la_ctime = rec->sa_ctime;
 799         la->la_atime = rec->sa_atime;
 800         la->la_mtime = rec->sa_mtime;
 801         ma->ma_valid = MA_INODE;
 802
 803         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 804                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 805                                  req_capsule_client_get(pill, &RMF_CAPA1));
 806
 807         RETURN(0);
 808 }
 809
 810 static int mdt_ioepoch_unpack(struct mdt_thread_info *info)
 811 {
 812         struct req_capsule *pill = info->mti_pill;
 813         ENTRY;
 814
 815         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
 816                 info->mti_ioepoch =
 817                         req_capsule_client_get(pill, &RMF_MDT_EPOCH);
 818         else
 819                 info->mti_ioepoch = NULL;
 820         RETURN(info->mti_ioepoch == NULL ? -EFAULT : 0);
 821 }
 822
 823 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
 824         struct req_capsule      *pill = info->mti_pill;
 825
 826         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
 827                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
 828                 if (info->mti_dlm_req == NULL)
 829                         RETURN(-EFAULT);
 830         }
 831
 832         RETURN(0);
 833 }
 834
 835 static int mdt_setattr_unpack(struct mdt_thread_info *info)
 836 {
 837         struct md_attr          *ma = &info->mti_attr;
 838         struct req_capsule      *pill = info->mti_pill;
 839         int rc;
 840         ENTRY;
 841
 842         rc = mdt_setattr_unpack_rec(info);
 843         if (rc)
 844                 RETURN(rc);
 845
 846         /* Epoch may be absent */
 847         mdt_ioepoch_unpack(info);
 848
 849         ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
 850         if (ma->ma_lmm_size) {
 851                 ma->ma_lmm = req_capsule_client_get(pill, &RMF_EADATA);
 852                 ma->ma_valid |= MA_LOV;
 853         }
 854
 855         ma->ma_cookie_size = req_capsule_get_size(pill, &RMF_LOGCOOKIES,
 856                                                   RCL_CLIENT);
 857         if (ma->ma_cookie_size) {
 858                 ma->ma_cookie = req_capsule_client_get(pill, &RMF_LOGCOOKIES);
 859                 ma->ma_valid |= MA_COOKIE;
 860         }
 861
 862         rc = mdt_dlmreq_unpack(info);
 863         RETURN(rc);
 864 }
 865
 866 int mdt_close_unpack(struct mdt_thread_info *info)
 867 {
 868         int rc;
 869         ENTRY;
 870
 871         rc = mdt_ioepoch_unpack(info);
 872         if (rc)
 873                 RETURN(rc);
 874
 875         RETURN(mdt_setattr_unpack_rec(info));
 876 }
 877
 878 static int mdt_create_unpack(struct mdt_thread_info *info)
 879 {
 880         struct md_ucred         *uc  = mdt_ucred(info);
 881         struct mdt_rec_create   *rec;
 882         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 883         struct mdt_reint_record *rr = &info->mti_rr;
 884         struct req_capsule      *pill = info->mti_pill;
 885         struct md_op_spec       *sp = &info->mti_spec;
 886         int rc;
 887         ENTRY;
 888
 889         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
 890         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 891         if (rec == NULL)
 892                 RETURN(-EFAULT);
 893
 894         uc->mu_fsuid = rec->cr_fsuid;
 895         uc->mu_fsgid = rec->cr_fsgid;
 896         uc->mu_cap   = rec->cr_cap;
 897         uc->mu_suppgids[0] = rec->cr_suppgid1;
 898         uc->mu_suppgids[1] = -1;
 899
 900         rr->rr_fid1 = &rec->cr_fid1;
 901         rr->rr_fid2 = &rec->cr_fid2;
 902         attr->la_mode = rec->cr_mode;
 903         attr->la_rdev  = rec->cr_rdev;
 904         attr->la_uid   = rec->cr_fsuid;
 905         attr->la_gid   = rec->cr_fsgid;
 906         attr->la_ctime = rec->cr_time;
 907         attr->la_mtime = rec->cr_time;
 908         attr->la_atime = rec->cr_time;
 909         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID |
 910                          LA_CTIME | LA_MTIME | LA_ATIME;
 911         memset(&sp->u, 0, sizeof(sp->u));
 912         sp->sp_cr_flags = get_mrc_cr_flags(rec);
 913         sp->sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
 914         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
 915
 916         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 917                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 918                                  req_capsule_client_get(pill, &RMF_CAPA1));
 919         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
 920
 921         if (!info->mti_cross_ref) {
 922                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 923                 rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME,
 924                                                       RCL_CLIENT) - 1;
 925                 LASSERT(rr->rr_name && rr->rr_namelen > 0);
 926         } else {
 927                 rr->rr_name = NULL;
 928                 rr->rr_namelen = 0;
 929         }
 930
 931 #ifdef CONFIG_FS_POSIX_ACL
 932         if (sp->sp_cr_flags & MDS_CREATE_RMT_ACL) {
 933                 if (S_ISDIR(attr->la_mode))
 934                         sp->u.sp_pfid = rr->rr_fid1;
 935                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 936                 LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
 937                                                   RCL_CLIENT));
 938                 sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
 939                 sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
 940                                                              RCL_CLIENT);
 941                 sp->u.sp_ea.fid = rr->rr_fid1;
 942                 RETURN(0);
 943         }
 944 #endif
 945         if (S_ISDIR(attr->la_mode)) {
 946                 /* pass parent fid for cross-ref cases */
 947                 sp->u.sp_pfid = rr->rr_fid1;
 948                 if (sp->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
 949                         /* create salve object req, need
 950                          * unpack split ea here
 951                          */
 952                        req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SLAVE);
 953                        LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
 954                                                          RCL_CLIENT));
 955                        sp->u.sp_ea.eadata = req_capsule_client_get(pill,
 956                                                                    &RMF_EADATA);
 957                        sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
 958                                                                     &RMF_EADATA,
 959                                                                     RCL_CLIENT);
 960                        sp->u.sp_ea.fid = rr->rr_fid1;
 961                        RETURN(0);
 962                 }
 963                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 964         } else if (S_ISLNK(attr->la_mode)) {
 965                 const char *tgt = NULL;
 966
 967                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
 968                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
 969                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
 970                         sp->u.sp_symname = tgt;
 971                 }
 972                 if (tgt == NULL)
 973                         RETURN(-EFAULT);
 974         } else {
 975                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 976         }
 977         rc = mdt_dlmreq_unpack(info);
 978         RETURN(rc);
 979 }
 980
 981 static int mdt_link_unpack(struct mdt_thread_info *info)
 982 {
 983         struct md_ucred         *uc  = mdt_ucred(info);
 984         struct mdt_rec_link     *rec;
 985         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 986         struct mdt_reint_record *rr = &info->mti_rr;
 987         struct req_capsule      *pill = info->mti_pill;
 988         int rc;
 989         ENTRY;
 990
 991         CLASSERT(sizeof(struct mdt_rec_link) == sizeof(struct mdt_rec_reint));
 992         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 993         if (rec == NULL)
 994                 RETURN(-EFAULT);
 995
 996         uc->mu_fsuid = rec->lk_fsuid;
 997         uc->mu_fsgid = rec->lk_fsgid;
 998         uc->mu_cap   = rec->lk_cap;
 999         uc->mu_suppgids[0] = rec->lk_suppgid1;
1000         uc->mu_suppgids[1] = rec->lk_suppgid2;
1001
1002         attr->la_uid = rec->lk_fsuid;
1003         attr->la_gid = rec->lk_fsgid;
1004         rr->rr_fid1 = &rec->lk_fid1;
1005         rr->rr_fid2 = &rec->lk_fid2;
1006         attr->la_ctime = rec->lk_time;
1007         attr->la_mtime = rec->lk_time;
1008         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1009
1010         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1011                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1012                                  req_capsule_client_get(pill, &RMF_CAPA1));
1013         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1014                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1015                                  req_capsule_client_get(pill, &RMF_CAPA2));
1016
1017         info->mti_spec.sp_ck_split = !!(rec->lk_bias & MDS_CHECK_SPLIT);
1018         info->mti_cross_ref = !!(rec->lk_bias & MDS_CROSS_REF);
1019         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1020         if (rr->rr_name == NULL)
1021                 RETURN(-EFAULT);
1022         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1023         if (!info->mti_cross_ref)
1024                 LASSERT(rr->rr_namelen > 0);
1025
1026         rc = mdt_dlmreq_unpack(info);
1027         RETURN(rc);
1028 }
1029
1030 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1031 {
1032         struct md_ucred         *uc  = mdt_ucred(info);
1033         struct mdt_rec_unlink   *rec;
1034         struct md_attr          *ma = &info->mti_attr;
1035         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1036         struct mdt_reint_record *rr = &info->mti_rr;
1037         struct req_capsule      *pill = info->mti_pill;
1038         int rc;
1039         ENTRY;
1040
1041         CLASSERT(sizeof(struct mdt_rec_unlink) == sizeof(struct mdt_rec_reint));
1042         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1043         if (rec == NULL)
1044                 RETURN(-EFAULT);
1045
1046         uc->mu_fsuid = rec->ul_fsuid;
1047         uc->mu_fsgid = rec->ul_fsgid;
1048         uc->mu_cap   = rec->ul_cap;
1049         uc->mu_suppgids[0] = rec->ul_suppgid1;
1050         uc->mu_suppgids[1] = -1;
1051
1052         attr->la_uid = rec->ul_fsuid;
1053         attr->la_gid = rec->ul_fsgid;
1054         rr->rr_fid1 = &rec->ul_fid1;
1055         rr->rr_fid2 = &rec->ul_fid2;
1056         attr->la_ctime = rec->ul_time;
1057         attr->la_mtime = rec->ul_time;
1058         attr->la_mode  = rec->ul_mode;
1059         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1060
1061         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1062                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1063                                  req_capsule_client_get(pill, &RMF_CAPA1));
1064
1065         info->mti_cross_ref = !!(rec->ul_bias & MDS_CROSS_REF);
1066         if (!info->mti_cross_ref) {
1067                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1068                 rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1069                 if (rr->rr_name == NULL || rr->rr_namelen == 0)
1070                         RETURN(-EFAULT);
1071         } else {
1072                 rr->rr_name = NULL;
1073                 rr->rr_namelen = 0;
1074         }
1075         info->mti_spec.sp_ck_split = !!(rec->ul_bias & MDS_CHECK_SPLIT);
1076         if (rec->ul_bias & MDS_VTX_BYPASS)
1077                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1078         else
1079                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1080
1081         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1082
1083         rc = mdt_dlmreq_unpack(info);
1084         RETURN(rc);
1085 }
1086
1087 static int mdt_rename_unpack(struct mdt_thread_info *info)
1088 {
1089         struct md_ucred         *uc = mdt_ucred(info);
1090         struct mdt_rec_rename   *rec;
1091         struct md_attr          *ma = &info->mti_attr;
1092         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1093         struct mdt_reint_record *rr = &info->mti_rr;
1094         struct req_capsule      *pill = info->mti_pill;
1095         int rc;
1096         ENTRY;
1097
1098         CLASSERT(sizeof(struct mdt_rec_rename) == sizeof(struct mdt_rec_reint));
1099         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1100         if (rec == NULL)
1101                 RETURN(-EFAULT);
1102
1103         uc->mu_fsuid = rec->rn_fsuid;
1104         uc->mu_fsgid = rec->rn_fsgid;
1105         uc->mu_cap   = rec->rn_cap;
1106         uc->mu_suppgids[0] = rec->rn_suppgid1;
1107         uc->mu_suppgids[1] = rec->rn_suppgid2;
1108
1109         attr->la_uid = rec->rn_fsuid;
1110         attr->la_gid = rec->rn_fsgid;
1111         rr->rr_fid1 = &rec->rn_fid1;
1112         rr->rr_fid2 = &rec->rn_fid2;
1113         attr->la_ctime = rec->rn_time;
1114         attr->la_mtime = rec->rn_time;
1115         /* rename_tgt contains the mode already */
1116         attr->la_mode = rec->rn_mode;
1117         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1118
1119         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1120                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1121                                  req_capsule_client_get(pill, &RMF_CAPA1));
1122         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1123                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1124                                  req_capsule_client_get(pill, &RMF_CAPA2));
1125
1126         info->mti_spec.sp_ck_split = !!(rec->rn_bias & MDS_CHECK_SPLIT);
1127         info->mti_cross_ref = !!(rec->rn_bias & MDS_CROSS_REF);
1128         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1129         rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1130         if (rr->rr_name == NULL || rr->rr_tgt == NULL)
1131                 RETURN(-EFAULT);
1132         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1133         rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
1134         if (!info->mti_cross_ref)
1135                 LASSERT(rr->rr_namelen > 0 && rr->rr_tgtlen > 0);
1136         if (rec->rn_bias & MDS_VTX_BYPASS)
1137                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1138         else
1139                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1140
1141         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1142
1143         rc = mdt_dlmreq_unpack(info);
1144         RETURN(rc);
1145 }
1146
1147 static int mdt_open_unpack(struct mdt_thread_info *info)
1148 {
1149         struct md_ucred         *uc = mdt_ucred(info);
1150         struct mdt_rec_create   *rec;
1151         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1152         struct req_capsule      *pill = info->mti_pill;
1153         struct mdt_reint_record *rr   = &info->mti_rr;
1154         struct ptlrpc_request   *req  = mdt_info_req(info);
1155         struct md_op_spec       *sp   = &info->mti_spec;
1156         ENTRY;
1157
1158         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1159         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1160         if (rec == NULL)
1161                 RETURN(-EFAULT);
1162
1163         uc->mu_fsuid = rec->cr_fsuid;
1164         uc->mu_fsgid = rec->cr_fsgid;
1165         uc->mu_cap   = rec->cr_cap;
1166         uc->mu_suppgids[0] = rec->cr_suppgid1;
1167         uc->mu_suppgids[1] = rec->cr_suppgid2;
1168
1169         rr->rr_fid1   = &rec->cr_fid1;
1170         rr->rr_fid2   = &rec->cr_fid2;
1171         rr->rr_handle = &rec->cr_old_handle;
1172         attr->la_mode = rec->cr_mode;
1173         attr->la_rdev  = rec->cr_rdev;
1174         attr->la_uid   = rec->cr_fsuid;
1175         attr->la_gid   = rec->cr_fsgid;
1176         attr->la_ctime = rec->cr_time;
1177         attr->la_mtime = rec->cr_time;
1178         attr->la_atime = rec->cr_time;
1179         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1180                          LA_CTIME | LA_MTIME | LA_ATIME;
1181         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1182         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1183         /* Do not trigger ASSERTION if client miss to set such flags. */
1184         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1185                 RETURN(-EPROTO);
1186         info->mti_replayepoch = rec->cr_ioepoch;
1187
1188         info->mti_spec.sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
1189         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1190
1191         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1192                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1193                                  req_capsule_client_get(pill, &RMF_CAPA1));
1194         if (req_is_replay(req) &&
1195             req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
1196 #if 0
1197                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1198                                  req_capsule_client_get(pill, &RMF_CAPA2));
1199 #else
1200                 /*
1201                  * FIXME: capa in replay open request might have expired,
1202                  * bypass capa check. Security hole?
1203                  */
1204                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1205                 mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1206 #endif
1207         }
1208
1209         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1210         if (rr->rr_name == NULL)
1211                 RETURN(-EFAULT);
1212         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1213
1214         sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1215                                                      RCL_CLIENT);
1216         if (sp->u.sp_ea.eadatalen) {
1217                 sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
1218                 sp->no_create = !!req_is_replay(req);
1219         }
1220
1221         RETURN(0);
1222 }
1223
1224 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1225 {
1226         struct mdt_reint_record   *rr   = &info->mti_rr;
1227         struct md_ucred           *uc   = mdt_ucred(info);
1228         struct lu_attr            *attr = &info->mti_attr.ma_attr;
1229         struct req_capsule        *pill = info->mti_pill;
1230         struct mdt_rec_setxattr   *rec;
1231         ENTRY;
1232
1233
1234         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1235                          sizeof(struct mdt_rec_reint));
1236
1237         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1238         if (rec == NULL)
1239                 RETURN(-EFAULT);
1240
1241         uc->mu_fsuid  = rec->sx_fsuid;
1242         uc->mu_fsgid  = rec->sx_fsgid;
1243         uc->mu_cap    = rec->sx_cap;
1244         uc->mu_suppgids[0] = rec->sx_suppgid1;
1245         uc->mu_suppgids[1] = -1;
1246
1247         rr->rr_opcode = rec->sx_opcode;
1248         rr->rr_fid1   = &rec->sx_fid;
1249         attr->la_valid = rec->sx_valid;
1250         attr->la_ctime = rec->sx_time;
1251         attr->la_size = rec->sx_size;
1252         attr->la_flags = rec->sx_flags;
1253
1254         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1255                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1256                                  req_capsule_client_get(pill, &RMF_CAPA1));
1257         else
1258                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1259
1260         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1261         if (rr->rr_name == NULL)
1262                 RETURN(-EFAULT);
1263         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1264         LASSERT(rr->rr_namelen > 0);
1265
1266         rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
1267         if (rr->rr_eadatalen > 0) {
1268                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1269                 if (rr->rr_eadata == NULL)
1270                         RETURN(-EFAULT);
1271         }
1272
1273         RETURN(0);
1274 }
1275
1276
1277 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1278
1279 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1280         [REINT_SETATTR]  = mdt_setattr_unpack,
1281         [REINT_CREATE]   = mdt_create_unpack,
1282         [REINT_LINK]     = mdt_link_unpack,
1283         [REINT_UNLINK]   = mdt_unlink_unpack,
1284         [REINT_RENAME]   = mdt_rename_unpack,
1285         [REINT_OPEN]     = mdt_open_unpack,
1286         [REINT_SETXATTR] = mdt_setxattr_unpack
1287 };
1288
1289 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1290 {
1291         int rc;
1292         ENTRY;
1293
1294         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1295         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1296                 info->mti_rr.rr_opcode = op;
1297                 rc = mdt_reint_unpackers[op](info);
1298         } else {
1299                 CERROR("Unexpected opcode %d\n", op);
1300                 rc = -EFAULT;
1301         }
1302         RETURN(rc);
1303 }