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         __u16                         count;
 533
 534         count = le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
 535
 536         CDEBUG(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
 537                le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
 538                le32_to_cpu(lmm->lmm_pattern));
 539         CDEBUG(level,"stripe_size=0x%x, stripe_count=0x%x\n",
 540                le32_to_cpu(lmm->lmm_stripe_size), count);
 541         if (count == LOV_ALL_STRIPES)
 542                 return;
 543         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 544         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++)
 545                 CDEBUG(level, "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
 546                        i, le32_to_cpu(lod->l_ost_idx),
 547                        le64_to_cpu(lod->l_object_seq),
 548                        le64_to_cpu(lod->l_object_id));
 549 }
 550
 551 void mdt_shrink_reply(struct mdt_thread_info *info)
 552 {
 553         struct req_capsule *pill = info->mti_pill;
 554         struct mdt_body    *body;
 555         int                md_size;
 556         int                acl_size;
 557         ENTRY;
 558
 559         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 560         LASSERT(body != NULL);
 561
 562         if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
 563                 md_size = body->eadatasize;
 564         else
 565                 md_size = 0;
 566
 567         acl_size = body->aclsize;
 568
 569         /* this replay - not send info to client */
 570         if (info->mti_spec.no_create == 1) {
 571                 md_size = 0;
 572                 acl_size = 0;
 573         }
 574
 575         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
 576                         " MDSCAPA = %llx, OSSCAPA = %llx\n",
 577                         md_size, acl_size,
 578                         (unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
 579                         (unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
 580 /*
 581             &RMF_MDT_BODY,
 582             &RMF_MDT_MD,
 583             &RMF_ACL, or &RMF_LOGCOOKIES
 584 (optional)  &RMF_CAPA1,
 585 (optional)  &RMF_CAPA2,
 586 (optional)  something else
 587 */
 588
 589         if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 590                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size,
 591                                    RCL_SERVER);
 592         if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
 593                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 594         else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
 595                 req_capsule_shrink(pill, &RMF_LOGCOOKIES,
 596                                    acl_size, RCL_SERVER);
 597
 598         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 599             !(body->valid & OBD_MD_FLMDSCAPA))
 600                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 601
 602         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 603             !(body->valid & OBD_MD_FLOSSCAPA))
 604                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 605
 606         /*
 607          * Some more field should be shrinked if needed.
 608          * This should be done by those who added fields to reply message.
 609          */
 610         EXIT;
 611 }
 612
 613
 614 /* if object is dying, pack the lov/llog data,
 615  * parameter info->mti_attr should be valid at this point! */
 616 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 617                            const struct md_attr *ma)
 618 {
 619         struct mdt_body       *repbody;
 620         const struct lu_attr *la = &ma->ma_attr;
 621         int rc;
 622         ENTRY;
 623
 624         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 625         LASSERT(repbody != NULL);
 626
 627         if (ma->ma_valid & MA_INODE)
 628                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 629
 630         if (ma->ma_valid & MA_LOV) {
 631                 __u32 mode;
 632
 633                 if (mdt_object_exists(mo) < 0)
 634                         /* If it is a remote object, and we do not retrieve
 635                          * EA back unlink reg file*/
 636                         mode = S_IFREG;
 637                 else
 638                         mode = lu_object_attr(&mo->mot_obj.mo_lu);
 639
 640                 LASSERT(ma->ma_lmm_size);
 641                 mdt_dump_lmm(D_INFO, ma->ma_lmm);
 642                 repbody->eadatasize = ma->ma_lmm_size;
 643                 if (S_ISREG(mode))
 644                         repbody->valid |= OBD_MD_FLEASIZE;
 645                 else if (S_ISDIR(mode))
 646                         repbody->valid |= OBD_MD_FLDIREA;
 647                 else
 648                         LBUG();
 649         }
 650
 651         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
 652                 repbody->aclsize = ma->ma_cookie_size;
 653                 repbody->valid |= OBD_MD_FLCOOKIE;
 654         }
 655
 656         if (info->mti_mdt->mdt_opts.mo_oss_capa &&
 657             info->mti_exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA &&
 658             repbody->valid & OBD_MD_FLEASIZE) {
 659                 struct lustre_capa *capa;
 660
 661                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
 662                 LASSERT(capa);
 663                 capa->lc_opc = CAPA_OPC_OSS_DESTROY;
 664                 rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
 665                 if (rc)
 666                         RETURN(rc);
 667
 668                 repbody->valid |= OBD_MD_FLOSSCAPA;
 669         }
 670
 671         RETURN(0);
 672 }
 673
 674 static inline unsigned int attr_unpack(__u64 sa_valid) {
 675         unsigned int ia_valid = 0;
 676
 677         if (sa_valid & MDS_ATTR_MODE)
 678                 ia_valid |= ATTR_MODE;
 679         if (sa_valid & MDS_ATTR_UID)
 680                 ia_valid |= ATTR_UID;
 681         if (sa_valid & MDS_ATTR_GID)
 682                 ia_valid |= ATTR_GID;
 683         if (sa_valid & MDS_ATTR_SIZE)
 684                 ia_valid |= ATTR_SIZE;
 685         if (sa_valid & MDS_ATTR_ATIME)
 686                 ia_valid |= ATTR_ATIME;
 687         if (sa_valid & MDS_ATTR_MTIME)
 688                 ia_valid |= ATTR_MTIME;
 689         if (sa_valid & MDS_ATTR_CTIME)
 690                 ia_valid |= ATTR_CTIME;
 691         if (sa_valid & MDS_ATTR_ATIME_SET)
 692                 ia_valid |= ATTR_ATIME_SET;
 693         if (sa_valid & MDS_ATTR_MTIME_SET)
 694                 ia_valid |= ATTR_MTIME_SET;
 695         if (sa_valid & MDS_ATTR_FORCE)
 696                 ia_valid |= ATTR_FORCE;
 697         if (sa_valid & MDS_ATTR_ATTR_FLAG)
 698                 ia_valid |= ATTR_ATTR_FLAG;
 699         if (sa_valid & MDS_ATTR_KILL_SUID)
 700                 ia_valid |=  ATTR_KILL_SUID;
 701         if (sa_valid & MDS_ATTR_KILL_SGID)
 702                 ia_valid |= ATTR_KILL_SGID;
 703         if (sa_valid & MDS_ATTR_CTIME_SET)
 704                 ia_valid |= ATTR_CTIME_SET;
 705         if (sa_valid & MDS_ATTR_FROM_OPEN)
 706                 ia_valid |= ATTR_FROM_OPEN;
 707         if (sa_valid & MDS_ATTR_BLOCKS)
 708                 ia_valid |= ATTR_BLOCKS;
 709         if (sa_valid & MDS_OPEN_OWNEROVERRIDE)
 710                 ia_valid |= MDS_OPEN_OWNEROVERRIDE;
 711         return ia_valid;
 712 }
 713
 714 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 715                                   struct md_attr *ma)
 716 {
 717         __u64 out;
 718
 719         out = 0;
 720         if (in & ATTR_MODE)
 721                 out |= LA_MODE;
 722         if (in & ATTR_UID)
 723                 out |= LA_UID;
 724         if (in & ATTR_GID)
 725                 out |= LA_GID;
 726         if (in & ATTR_SIZE)
 727                 out |= LA_SIZE;
 728         if (in & ATTR_BLOCKS)
 729                 out |= LA_BLOCKS;
 730
 731         if (in & ATTR_FROM_OPEN)
 732                 rr->rr_flags |= MRF_OPEN_TRUNC;
 733
 734         if (in & ATTR_ATIME_SET)
 735                 out |= LA_ATIME;
 736
 737         if (in & ATTR_CTIME_SET)
 738                 out |= LA_CTIME;
 739
 740         if (in & ATTR_MTIME_SET)
 741                 out |= LA_MTIME;
 742
 743         if (in & ATTR_ATTR_FLAG)
 744                 out |= LA_FLAGS;
 745
 746         if (in & ATTR_KILL_SUID)
 747                 out |= LA_KILL_SUID;
 748
 749         if (in & ATTR_KILL_SGID)
 750                 out |= LA_KILL_SGID;
 751
 752         if (in & MDS_OPEN_OWNEROVERRIDE)
 753                 ma->ma_attr_flags |= MDS_OPEN_OWNEROVERRIDE;
 754
 755         if (in & ATTR_FORCE)
 756                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 757
 758         /*XXX need ATTR_RAW?*/
 759         in &= ~(ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_BLOCKS|
 760                 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME|ATTR_FROM_OPEN|
 761                 ATTR_ATIME_SET|ATTR_CTIME_SET|ATTR_MTIME_SET|
 762                 ATTR_ATTR_FLAG|ATTR_RAW|MDS_OPEN_OWNEROVERRIDE|
 763                 ATTR_FORCE|ATTR_KILL_SUID|ATTR_KILL_SGID);
 764         if (in != 0)
 765                 CERROR("Unknown attr bits: "LPX64"\n", in);
 766         return out;
 767 }
 768 /* unpacking */
 769
 770 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
 771 {
 772         struct md_ucred         *uc  = mdt_ucred(info);
 773         struct md_attr          *ma = &info->mti_attr;
 774         struct lu_attr          *la = &ma->ma_attr;
 775         struct req_capsule      *pill = info->mti_pill;
 776         struct mdt_reint_record *rr = &info->mti_rr;
 777         struct mdt_rec_setattr  *rec;
 778         ENTRY;
 779
 780         CLASSERT(sizeof(struct mdt_rec_setattr)== sizeof(struct mdt_rec_reint));
 781         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 782         if (rec == NULL)
 783                 RETURN(-EFAULT);
 784
 785         uc->mu_fsuid = rec->sa_fsuid;
 786         uc->mu_fsgid = rec->sa_fsgid;
 787         uc->mu_cap   = rec->sa_cap;
 788         uc->mu_suppgids[0] = rec->sa_suppgid;
 789         uc->mu_suppgids[1] = -1;
 790
 791         rr->rr_fid1 = &rec->sa_fid;
 792         la->la_valid = mdt_attr_valid_xlate(attr_unpack(rec->sa_valid), rr, ma);
 793         la->la_mode  = rec->sa_mode;
 794         la->la_flags = rec->sa_attr_flags;
 795         la->la_uid   = rec->sa_uid;
 796         la->la_gid   = rec->sa_gid;
 797         la->la_size  = rec->sa_size;
 798         la->la_blocks = rec->sa_blocks;
 799         la->la_ctime = rec->sa_ctime;
 800         la->la_atime = rec->sa_atime;
 801         la->la_mtime = rec->sa_mtime;
 802         ma->ma_valid = MA_INODE;
 803
 804         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 805                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 806                                  req_capsule_client_get(pill, &RMF_CAPA1));
 807
 808         RETURN(0);
 809 }
 810
 811 static int mdt_ioepoch_unpack(struct mdt_thread_info *info)
 812 {
 813         struct req_capsule *pill = info->mti_pill;
 814         ENTRY;
 815
 816         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
 817                 info->mti_ioepoch =
 818                         req_capsule_client_get(pill, &RMF_MDT_EPOCH);
 819         else
 820                 info->mti_ioepoch = NULL;
 821         RETURN(info->mti_ioepoch == NULL ? -EFAULT : 0);
 822 }
 823
 824 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
 825         struct req_capsule      *pill = info->mti_pill;
 826
 827         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
 828                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
 829                 if (info->mti_dlm_req == NULL)
 830                         RETURN(-EFAULT);
 831         }
 832
 833         RETURN(0);
 834 }
 835
 836 static int mdt_setattr_unpack(struct mdt_thread_info *info)
 837 {
 838         struct md_attr          *ma = &info->mti_attr;
 839         struct req_capsule      *pill = info->mti_pill;
 840         int rc;
 841         ENTRY;
 842
 843         rc = mdt_setattr_unpack_rec(info);
 844         if (rc)
 845                 RETURN(rc);
 846
 847         /* Epoch may be absent */
 848         mdt_ioepoch_unpack(info);
 849
 850         ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
 851         if (ma->ma_lmm_size) {
 852                 ma->ma_lmm = req_capsule_client_get(pill, &RMF_EADATA);
 853                 ma->ma_valid |= MA_LOV;
 854         }
 855
 856         ma->ma_cookie_size = req_capsule_get_size(pill, &RMF_LOGCOOKIES,
 857                                                   RCL_CLIENT);
 858         if (ma->ma_cookie_size) {
 859                 ma->ma_cookie = req_capsule_client_get(pill, &RMF_LOGCOOKIES);
 860                 ma->ma_valid |= MA_COOKIE;
 861         }
 862
 863         rc = mdt_dlmreq_unpack(info);
 864         RETURN(rc);
 865 }
 866
 867 int mdt_close_unpack(struct mdt_thread_info *info)
 868 {
 869         int rc;
 870         ENTRY;
 871
 872         rc = mdt_ioepoch_unpack(info);
 873         if (rc)
 874                 RETURN(rc);
 875
 876         RETURN(mdt_setattr_unpack_rec(info));
 877 }
 878
 879 static int mdt_create_unpack(struct mdt_thread_info *info)
 880 {
 881         struct md_ucred         *uc  = mdt_ucred(info);
 882         struct mdt_rec_create   *rec;
 883         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 884         struct mdt_reint_record *rr = &info->mti_rr;
 885         struct req_capsule      *pill = info->mti_pill;
 886         struct md_op_spec       *sp = &info->mti_spec;
 887         int rc;
 888         ENTRY;
 889
 890         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
 891         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 892         if (rec == NULL)
 893                 RETURN(-EFAULT);
 894
 895         uc->mu_fsuid = rec->cr_fsuid;
 896         uc->mu_fsgid = rec->cr_fsgid;
 897         uc->mu_cap   = rec->cr_cap;
 898         uc->mu_suppgids[0] = rec->cr_suppgid1;
 899         uc->mu_suppgids[1] = -1;
 900
 901         rr->rr_fid1 = &rec->cr_fid1;
 902         rr->rr_fid2 = &rec->cr_fid2;
 903         attr->la_mode = rec->cr_mode;
 904         attr->la_rdev  = rec->cr_rdev;
 905         attr->la_uid   = rec->cr_fsuid;
 906         attr->la_gid   = rec->cr_fsgid;
 907         attr->la_ctime = rec->cr_time;
 908         attr->la_mtime = rec->cr_time;
 909         attr->la_atime = rec->cr_time;
 910         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID |
 911                          LA_CTIME | LA_MTIME | LA_ATIME;
 912         memset(&sp->u, 0, sizeof(sp->u));
 913         sp->sp_cr_flags = get_mrc_cr_flags(rec);
 914         sp->sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
 915         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
 916
 917         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 918                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 919                                  req_capsule_client_get(pill, &RMF_CAPA1));
 920         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
 921
 922         if (!info->mti_cross_ref) {
 923                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 924                 rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME,
 925                                                       RCL_CLIENT) - 1;
 926                 LASSERT(rr->rr_name && rr->rr_namelen > 0);
 927         } else {
 928                 rr->rr_name = NULL;
 929                 rr->rr_namelen = 0;
 930         }
 931
 932 #ifdef CONFIG_FS_POSIX_ACL
 933         if (sp->sp_cr_flags & MDS_CREATE_RMT_ACL) {
 934                 if (S_ISDIR(attr->la_mode))
 935                         sp->u.sp_pfid = rr->rr_fid1;
 936                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 937                 LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
 938                                                   RCL_CLIENT));
 939                 sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
 940                 sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
 941                                                              RCL_CLIENT);
 942                 sp->u.sp_ea.fid = rr->rr_fid1;
 943                 RETURN(0);
 944         }
 945 #endif
 946         if (S_ISDIR(attr->la_mode)) {
 947                 /* pass parent fid for cross-ref cases */
 948                 sp->u.sp_pfid = rr->rr_fid1;
 949                 if (sp->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
 950                         /* create salve object req, need
 951                          * unpack split ea here
 952                          */
 953                        req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SLAVE);
 954                        LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
 955                                                          RCL_CLIENT));
 956                        sp->u.sp_ea.eadata = req_capsule_client_get(pill,
 957                                                                    &RMF_EADATA);
 958                        sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
 959                                                                     &RMF_EADATA,
 960                                                                     RCL_CLIENT);
 961                        sp->u.sp_ea.fid = rr->rr_fid1;
 962                        RETURN(0);
 963                 }
 964                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 965         } else if (S_ISLNK(attr->la_mode)) {
 966                 const char *tgt = NULL;
 967
 968                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
 969                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
 970                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
 971                         sp->u.sp_symname = tgt;
 972                 }
 973                 if (tgt == NULL)
 974                         RETURN(-EFAULT);
 975         } else {
 976                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 977         }
 978         rc = mdt_dlmreq_unpack(info);
 979         RETURN(rc);
 980 }
 981
 982 static int mdt_link_unpack(struct mdt_thread_info *info)
 983 {
 984         struct md_ucred         *uc  = mdt_ucred(info);
 985         struct mdt_rec_link     *rec;
 986         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 987         struct mdt_reint_record *rr = &info->mti_rr;
 988         struct req_capsule      *pill = info->mti_pill;
 989         int rc;
 990         ENTRY;
 991
 992         CLASSERT(sizeof(struct mdt_rec_link) == sizeof(struct mdt_rec_reint));
 993         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 994         if (rec == NULL)
 995                 RETURN(-EFAULT);
 996
 997         uc->mu_fsuid = rec->lk_fsuid;
 998         uc->mu_fsgid = rec->lk_fsgid;
 999         uc->mu_cap   = rec->lk_cap;
1000         uc->mu_suppgids[0] = rec->lk_suppgid1;
1001         uc->mu_suppgids[1] = rec->lk_suppgid2;
1002
1003         attr->la_uid = rec->lk_fsuid;
1004         attr->la_gid = rec->lk_fsgid;
1005         rr->rr_fid1 = &rec->lk_fid1;
1006         rr->rr_fid2 = &rec->lk_fid2;
1007         attr->la_ctime = rec->lk_time;
1008         attr->la_mtime = rec->lk_time;
1009         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1010
1011         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1012                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1013                                  req_capsule_client_get(pill, &RMF_CAPA1));
1014         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1015                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1016                                  req_capsule_client_get(pill, &RMF_CAPA2));
1017
1018         info->mti_spec.sp_ck_split = !!(rec->lk_bias & MDS_CHECK_SPLIT);
1019         info->mti_cross_ref = !!(rec->lk_bias & MDS_CROSS_REF);
1020         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1021         if (rr->rr_name == NULL)
1022                 RETURN(-EFAULT);
1023         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1024         if (!info->mti_cross_ref)
1025                 LASSERT(rr->rr_namelen > 0);
1026
1027         rc = mdt_dlmreq_unpack(info);
1028         RETURN(rc);
1029 }
1030
1031 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1032 {
1033         struct md_ucred         *uc  = mdt_ucred(info);
1034         struct mdt_rec_unlink   *rec;
1035         struct md_attr          *ma = &info->mti_attr;
1036         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1037         struct mdt_reint_record *rr = &info->mti_rr;
1038         struct req_capsule      *pill = info->mti_pill;
1039         int rc;
1040         ENTRY;
1041
1042         CLASSERT(sizeof(struct mdt_rec_unlink) == sizeof(struct mdt_rec_reint));
1043         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1044         if (rec == NULL)
1045                 RETURN(-EFAULT);
1046
1047         uc->mu_fsuid = rec->ul_fsuid;
1048         uc->mu_fsgid = rec->ul_fsgid;
1049         uc->mu_cap   = rec->ul_cap;
1050         uc->mu_suppgids[0] = rec->ul_suppgid1;
1051         uc->mu_suppgids[1] = -1;
1052
1053         attr->la_uid = rec->ul_fsuid;
1054         attr->la_gid = rec->ul_fsgid;
1055         rr->rr_fid1 = &rec->ul_fid1;
1056         rr->rr_fid2 = &rec->ul_fid2;
1057         attr->la_ctime = rec->ul_time;
1058         attr->la_mtime = rec->ul_time;
1059         attr->la_mode  = rec->ul_mode;
1060         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1061
1062         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1063                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1064                                  req_capsule_client_get(pill, &RMF_CAPA1));
1065
1066         info->mti_cross_ref = !!(rec->ul_bias & MDS_CROSS_REF);
1067         if (!info->mti_cross_ref) {
1068                 rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1069                 rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1070                 if (rr->rr_name == NULL || rr->rr_namelen == 0)
1071                         RETURN(-EFAULT);
1072         } else {
1073                 rr->rr_name = NULL;
1074                 rr->rr_namelen = 0;
1075         }
1076         info->mti_spec.sp_ck_split = !!(rec->ul_bias & MDS_CHECK_SPLIT);
1077         if (rec->ul_bias & MDS_VTX_BYPASS)
1078                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1079         else
1080                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1081
1082         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1083
1084         rc = mdt_dlmreq_unpack(info);
1085         RETURN(rc);
1086 }
1087
1088 static int mdt_rename_unpack(struct mdt_thread_info *info)
1089 {
1090         struct md_ucred         *uc = mdt_ucred(info);
1091         struct mdt_rec_rename   *rec;
1092         struct md_attr          *ma = &info->mti_attr;
1093         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1094         struct mdt_reint_record *rr = &info->mti_rr;
1095         struct req_capsule      *pill = info->mti_pill;
1096         int rc;
1097         ENTRY;
1098
1099         CLASSERT(sizeof(struct mdt_rec_rename) == sizeof(struct mdt_rec_reint));
1100         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1101         if (rec == NULL)
1102                 RETURN(-EFAULT);
1103
1104         uc->mu_fsuid = rec->rn_fsuid;
1105         uc->mu_fsgid = rec->rn_fsgid;
1106         uc->mu_cap   = rec->rn_cap;
1107         uc->mu_suppgids[0] = rec->rn_suppgid1;
1108         uc->mu_suppgids[1] = rec->rn_suppgid2;
1109
1110         attr->la_uid = rec->rn_fsuid;
1111         attr->la_gid = rec->rn_fsgid;
1112         rr->rr_fid1 = &rec->rn_fid1;
1113         rr->rr_fid2 = &rec->rn_fid2;
1114         attr->la_ctime = rec->rn_time;
1115         attr->la_mtime = rec->rn_time;
1116         /* rename_tgt contains the mode already */
1117         attr->la_mode = rec->rn_mode;
1118         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1119
1120         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1121                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1122                                  req_capsule_client_get(pill, &RMF_CAPA1));
1123         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1124                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1125                                  req_capsule_client_get(pill, &RMF_CAPA2));
1126
1127         info->mti_spec.sp_ck_split = !!(rec->rn_bias & MDS_CHECK_SPLIT);
1128         info->mti_cross_ref = !!(rec->rn_bias & MDS_CROSS_REF);
1129         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1130         rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1131         if (rr->rr_name == NULL || rr->rr_tgt == NULL)
1132                 RETURN(-EFAULT);
1133         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1134         rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
1135         if (!info->mti_cross_ref)
1136                 LASSERT(rr->rr_namelen > 0 && rr->rr_tgtlen > 0);
1137         if (rec->rn_bias & MDS_VTX_BYPASS)
1138                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1139         else
1140                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1141
1142         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1143
1144         rc = mdt_dlmreq_unpack(info);
1145         RETURN(rc);
1146 }
1147
1148 static int mdt_open_unpack(struct mdt_thread_info *info)
1149 {
1150         struct md_ucred         *uc = mdt_ucred(info);
1151         struct mdt_rec_create   *rec;
1152         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1153         struct req_capsule      *pill = info->mti_pill;
1154         struct mdt_reint_record *rr   = &info->mti_rr;
1155         struct ptlrpc_request   *req  = mdt_info_req(info);
1156         struct md_op_spec       *sp   = &info->mti_spec;
1157         ENTRY;
1158
1159         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1160         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1161         if (rec == NULL)
1162                 RETURN(-EFAULT);
1163
1164         uc->mu_fsuid = rec->cr_fsuid;
1165         uc->mu_fsgid = rec->cr_fsgid;
1166         uc->mu_cap   = rec->cr_cap;
1167         uc->mu_suppgids[0] = rec->cr_suppgid1;
1168         uc->mu_suppgids[1] = rec->cr_suppgid2;
1169
1170         rr->rr_fid1   = &rec->cr_fid1;
1171         rr->rr_fid2   = &rec->cr_fid2;
1172         rr->rr_handle = &rec->cr_old_handle;
1173         attr->la_mode = rec->cr_mode;
1174         attr->la_rdev  = rec->cr_rdev;
1175         attr->la_uid   = rec->cr_fsuid;
1176         attr->la_gid   = rec->cr_fsgid;
1177         attr->la_ctime = rec->cr_time;
1178         attr->la_mtime = rec->cr_time;
1179         attr->la_atime = rec->cr_time;
1180         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1181                          LA_CTIME | LA_MTIME | LA_ATIME;
1182         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1183         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1184         /* Do not trigger ASSERTION if client miss to set such flags. */
1185         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1186                 RETURN(-EPROTO);
1187         info->mti_replayepoch = rec->cr_ioepoch;
1188
1189         info->mti_spec.sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
1190         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1191
1192         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1193                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1194                                  req_capsule_client_get(pill, &RMF_CAPA1));
1195         if (req_is_replay(req) &&
1196             req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
1197 #if 0
1198                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1199                                  req_capsule_client_get(pill, &RMF_CAPA2));
1200 #else
1201                 /*
1202                  * FIXME: capa in replay open request might have expired,
1203                  * bypass capa check. Security hole?
1204                  */
1205                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1206                 mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1207 #endif
1208         }
1209
1210         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1211         if (rr->rr_name == NULL)
1212                 RETURN(-EFAULT);
1213         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1214
1215         sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1216                                                      RCL_CLIENT);
1217         if (sp->u.sp_ea.eadatalen) {
1218                 sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
1219                 sp->no_create = !!req_is_replay(req);
1220         }
1221
1222         RETURN(0);
1223 }
1224
1225 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1226 {
1227         struct mdt_reint_record   *rr   = &info->mti_rr;
1228         struct md_ucred           *uc   = mdt_ucred(info);
1229         struct lu_attr            *attr = &info->mti_attr.ma_attr;
1230         struct req_capsule        *pill = info->mti_pill;
1231         struct mdt_rec_setxattr   *rec;
1232         ENTRY;
1233
1234
1235         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1236                          sizeof(struct mdt_rec_reint));
1237
1238         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1239         if (rec == NULL)
1240                 RETURN(-EFAULT);
1241
1242         uc->mu_fsuid  = rec->sx_fsuid;
1243         uc->mu_fsgid  = rec->sx_fsgid;
1244         uc->mu_cap    = rec->sx_cap;
1245         uc->mu_suppgids[0] = rec->sx_suppgid1;
1246         uc->mu_suppgids[1] = -1;
1247
1248         rr->rr_opcode = rec->sx_opcode;
1249         rr->rr_fid1   = &rec->sx_fid;
1250         attr->la_valid = rec->sx_valid;
1251         attr->la_ctime = rec->sx_time;
1252         attr->la_size = rec->sx_size;
1253         attr->la_flags = rec->sx_flags;
1254
1255         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1256                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1257                                  req_capsule_client_get(pill, &RMF_CAPA1));
1258         else
1259                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1260
1261         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1262         if (rr->rr_name == NULL)
1263                 RETURN(-EFAULT);
1264         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1265         LASSERT(rr->rr_namelen > 0);
1266
1267         rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT);
1268         if (rr->rr_eadatalen > 0) {
1269                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1270                 if (rr->rr_eadata == NULL)
1271                         RETURN(-EFAULT);
1272         }
1273
1274         RETURN(0);
1275 }
1276
1277
1278 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1279
1280 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1281         [REINT_SETATTR]  = mdt_setattr_unpack,
1282         [REINT_CREATE]   = mdt_create_unpack,
1283         [REINT_LINK]     = mdt_link_unpack,
1284         [REINT_UNLINK]   = mdt_unlink_unpack,
1285         [REINT_RENAME]   = mdt_rename_unpack,
1286         [REINT_OPEN]     = mdt_open_unpack,
1287         [REINT_SETXATTR] = mdt_setxattr_unpack
1288 };
1289
1290 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1291 {
1292         int rc;
1293         ENTRY;
1294
1295         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1296         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1297                 info->mti_rr.rr_opcode = op;
1298                 rc = mdt_reint_unpackers[op](info);
1299         } else {
1300                 CERROR("Unexpected opcode %d\n", op);
1301                 rc = -EFAULT;
1302         }
1303         RETURN(rc);
1304 }