lustre/mdt/mdt_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  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 #define DEBUG_SUBSYSTEM S_MDS
  50
  51 #include "mdt_internal.h"
  52 #include <lnet/lib-lnet.h>
  53
  54
  55 typedef enum ucred_init_type {
  56         NONE_INIT       = 0,
  57         BODY_INIT       = 1,
  58         REC_INIT        = 2
  59 } ucred_init_type_t;
  60
  61 void mdt_exit_ucred(struct mdt_thread_info *info)
  62 {
  63         struct lu_ucred   *uc  = mdt_ucred(info);
  64         struct mdt_device *mdt = info->mti_mdt;
  65
  66         LASSERT(uc != NULL);
  67         if (uc->uc_valid != UCRED_INIT) {
  68                 uc->uc_suppgids[0] = uc->uc_suppgids[1] = -1;
  69                 if (uc->uc_ginfo) {
  70                         cfs_put_group_info(uc->uc_ginfo);
  71                         uc->uc_ginfo = NULL;
  72                 }
  73                 if (uc->uc_identity) {
  74                         mdt_identity_put(mdt->mdt_identity_cache,
  75                                          uc->uc_identity);
  76                         uc->uc_identity = NULL;
  77                 }
  78                 uc->uc_valid = UCRED_INIT;
  79         }
  80 }
  81
  82 static int match_nosquash_list(struct rw_semaphore *sem,
  83                                cfs_list_t *nidlist,
  84                                lnet_nid_t peernid)
  85 {
  86         int rc;
  87         ENTRY;
  88         down_read(sem);
  89         rc = cfs_match_nid(peernid, nidlist);
  90         up_read(sem);
  91         RETURN(rc);
  92 }
  93
  94 /* root_squash for inter-MDS operations */
  95 static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
  96 {
  97         struct lu_ucred *ucred = mdt_ucred(info);
  98         ENTRY;
  99
 100         LASSERT(ucred != NULL);
 101         if (!info->mti_mdt->mdt_squash_uid || ucred->uc_fsuid)
 102                 RETURN(0);
 103
 104         if (match_nosquash_list(&info->mti_mdt->mdt_squash_sem,
 105                                 &info->mti_mdt->mdt_nosquash_nids,
 106                                 peernid)) {
 107                 CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
 108                        libcfs_nid2str(peernid));
 109                 RETURN(0);
 110         }
 111
 112         CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
 113                libcfs_nid2str(peernid),
 114                ucred->uc_fsuid, ucred->uc_fsgid, ucred->uc_cap,
 115                info->mti_mdt->mdt_squash_uid, info->mti_mdt->mdt_squash_gid,
 116                0);
 117
 118         ucred->uc_fsuid = info->mti_mdt->mdt_squash_uid;
 119         ucred->uc_fsgid = info->mti_mdt->mdt_squash_gid;
 120         ucred->uc_cap = 0;
 121         ucred->uc_suppgids[0] = -1;
 122         ucred->uc_suppgids[1] = -1;
 123
 124         RETURN(0);
 125 }
 126
 127 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 128                           void *buf)
 129 {
 130         struct ptlrpc_request   *req = mdt_info_req(info);
 131         struct mdt_device       *mdt = info->mti_mdt;
 132         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 133         struct lu_ucred         *ucred = mdt_ucred(info);
 134         lnet_nid_t               peernid = req->rq_peer.nid;
 135         __u32                    perm = 0;
 136         __u32                    remote = exp_connect_rmtclient(info->mti_exp);
 137         int                      setuid;
 138         int                      setgid;
 139         int                      rc = 0;
 140
 141         ENTRY;
 142
 143         LASSERT(req->rq_auth_gss);
 144         LASSERT(!req->rq_auth_usr_mdt);
 145         LASSERT(req->rq_user_desc);
 146         LASSERT(ucred != NULL);
 147
 148         ucred->uc_valid = UCRED_INVALID;
 149
 150         ucred->uc_o_uid   = pud->pud_uid;
 151         ucred->uc_o_gid   = pud->pud_gid;
 152         ucred->uc_o_fsuid = pud->pud_fsuid;
 153         ucred->uc_o_fsgid = pud->pud_fsgid;
 154
 155         if (type == BODY_INIT) {
 156                 struct mdt_body *body = (struct mdt_body *)buf;
 157
 158                 ucred->uc_suppgids[0] = body->suppgid;
 159                 ucred->uc_suppgids[1] = -1;
 160         }
 161
 162         /* sanity check: we expect the uid which client claimed is true */
 163         if (remote) {
 164                 if (req->rq_auth_mapped_uid == INVALID_UID) {
 165                         CDEBUG(D_SEC, "remote user not mapped, deny access!\n");
 166                         RETURN(-EACCES);
 167                 }
 168
 169                 if (ptlrpc_user_desc_do_idmap(req, pud))
 170                         RETURN(-EACCES);
 171
 172                 if (req->rq_auth_mapped_uid != pud->pud_uid) {
 173                         CDEBUG(D_SEC, "remote client %s: auth/mapped uid %u/%u "
 174                                "while client claims %u:%u/%u:%u\n",
 175                                libcfs_nid2str(peernid), req->rq_auth_uid,
 176                                req->rq_auth_mapped_uid,
 177                                pud->pud_uid, pud->pud_gid,
 178                                pud->pud_fsuid, pud->pud_fsgid);
 179                         RETURN(-EACCES);
 180                 }
 181         } else {
 182                 if (req->rq_auth_uid != pud->pud_uid) {
 183                         CDEBUG(D_SEC, "local client %s: auth uid %u "
 184                                "while client claims %u:%u/%u:%u\n",
 185                                libcfs_nid2str(peernid), req->rq_auth_uid,
 186                                pud->pud_uid, pud->pud_gid,
 187                                pud->pud_fsuid, pud->pud_fsgid);
 188                         RETURN(-EACCES);
 189                 }
 190         }
 191
 192         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 193                 if (remote) {
 194                         CDEBUG(D_SEC, "remote client must run with identity_get "
 195                                "enabled!\n");
 196                         RETURN(-EACCES);
 197                 } else {
 198                         ucred->uc_identity = NULL;
 199                         perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 200                                CFS_SETGRP_PERM;
 201                 }
 202         } else {
 203                 struct md_identity *identity;
 204
 205                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 206                                             pud->pud_uid);
 207                 if (IS_ERR(identity)) {
 208                         if (unlikely(PTR_ERR(identity) == -EREMCHG &&
 209                                      !remote)) {
 210                                 ucred->uc_identity = NULL;
 211                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 212                                        CFS_SETGRP_PERM;
 213                         } else {
 214                                 CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 215                                        pud->pud_uid);
 216                                 RETURN(-EACCES);
 217                         }
 218                 } else {
 219                         ucred->uc_identity = identity;
 220                         perm = mdt_identity_get_perm(ucred->uc_identity,
 221                                                      remote, peernid);
 222                 }
 223         }
 224
 225         /* find out the setuid/setgid attempt */
 226         setuid = (pud->pud_uid != pud->pud_fsuid);
 227         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 228                   (ucred->uc_identity &&
 229                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
 230
 231         /* check permission of setuid */
 232         if (setuid && !(perm & CFS_SETUID_PERM)) {
 233                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 234                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 235                 GOTO(out, rc = -EACCES);
 236         }
 237
 238         /* check permission of setgid */
 239         if (setgid && !(perm & CFS_SETGID_PERM)) {
 240                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 241                        "from %s\n", pud->pud_uid, pud->pud_gid,
 242                        pud->pud_fsuid, pud->pud_fsgid,
 243                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
 244                 GOTO(out, rc = -EACCES);
 245         }
 246
 247         /*
 248          * NB: remote client not allowed to setgroups anyway.
 249          */
 250         if (!remote && perm & CFS_SETGRP_PERM) {
 251                 if (pud->pud_ngroups) {
 252                         /* setgroups for local client */
 253                         ucred->uc_ginfo = cfs_groups_alloc(pud->pud_ngroups);
 254                         if (!ucred->uc_ginfo) {
 255                                 CERROR("failed to alloc %d groups\n",
 256                                        pud->pud_ngroups);
 257                                 GOTO(out, rc = -ENOMEM);
 258                         }
 259
 260                         lustre_groups_from_list(ucred->uc_ginfo,
 261                                                 pud->pud_groups);
 262                         lustre_groups_sort(ucred->uc_ginfo);
 263                 } else {
 264                         ucred->uc_ginfo = NULL;
 265                 }
 266         } else {
 267                 ucred->uc_suppgids[0] = -1;
 268                 ucred->uc_suppgids[1] = -1;
 269                 ucred->uc_ginfo = NULL;
 270         }
 271
 272         ucred->uc_uid   = pud->pud_uid;
 273         ucred->uc_gid   = pud->pud_gid;
 274         ucred->uc_fsuid = pud->pud_fsuid;
 275         ucred->uc_fsgid = pud->pud_fsgid;
 276
 277         /* process root_squash here. */
 278         mdt_root_squash(info, peernid);
 279
 280         /* remove fs privilege for non-root user. */
 281         if (ucred->uc_fsuid)
 282                 ucred->uc_cap = pud->pud_cap & ~CFS_CAP_FS_MASK;
 283         else
 284                 ucred->uc_cap = pud->pud_cap;
 285         if (remote && !(perm & CFS_RMTOWN_PERM))
 286                 ucred->uc_cap &= ~(CFS_CAP_SYS_RESOURCE_MASK |
 287                                    CFS_CAP_CHOWN_MASK);
 288         ucred->uc_valid = UCRED_NEW;
 289
 290         EXIT;
 291
 292 out:
 293         if (rc) {
 294                 if (ucred->uc_ginfo) {
 295                         cfs_put_group_info(ucred->uc_ginfo);
 296                         ucred->uc_ginfo = NULL;
 297                 }
 298                 if (ucred->uc_identity) {
 299                         mdt_identity_put(mdt->mdt_identity_cache,
 300                                          ucred->uc_identity);
 301                         ucred->uc_identity = NULL;
 302                 }
 303         }
 304
 305         return rc;
 306 }
 307
 308 int mdt_check_ucred(struct mdt_thread_info *info)
 309 {
 310         struct ptlrpc_request   *req = mdt_info_req(info);
 311         struct mdt_device       *mdt = info->mti_mdt;
 312         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 313         struct lu_ucred         *ucred = mdt_ucred(info);
 314         struct md_identity      *identity = NULL;
 315         lnet_nid_t               peernid = req->rq_peer.nid;
 316         __u32                    perm = 0;
 317         __u32                    remote = exp_connect_rmtclient(info->mti_exp);
 318         int                      setuid;
 319         int                      setgid;
 320         int                      rc = 0;
 321
 322         ENTRY;
 323
 324         LASSERT(ucred != NULL);
 325         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_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 lu_ucred *uc = mdt_ucred(info);
 416         struct mdt_device  *mdt = info->mti_mdt;
 417         struct md_identity *identity = NULL;
 418
 419         ENTRY;
 420
 421         LASSERT(uc != NULL);
 422         uc->uc_valid = UCRED_INVALID;
 423         uc->uc_o_uid = uc->uc_uid = body->uid;
 424         uc->uc_o_gid = uc->uc_gid = body->gid;
 425         uc->uc_o_fsuid = uc->uc_fsuid = body->fsuid;
 426         uc->uc_o_fsgid = uc->uc_fsgid = body->fsgid;
 427         uc->uc_suppgids[0] = body->suppgid;
 428         uc->uc_suppgids[1] = -1;
 429         uc->uc_ginfo = NULL;
 430         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 431                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 432                                             uc->uc_fsuid);
 433                 if (IS_ERR(identity)) {
 434                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 435                                 identity = NULL;
 436                         } else {
 437                                 CDEBUG(D_SEC, "Deny access without identity: "
 438                                        "uid %u\n", uc->uc_fsuid);
 439                                 RETURN(-EACCES);
 440                         }
 441                 }
 442         }
 443         uc->uc_identity = identity;
 444
 445         /* process root_squash here. */
 446         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 447
 448         /* remove fs privilege for non-root user. */
 449         if (uc->uc_fsuid)
 450                 uc->uc_cap = body->capability & ~CFS_CAP_FS_MASK;
 451         else
 452                 uc->uc_cap = body->capability;
 453         uc->uc_valid = UCRED_OLD;
 454
 455         RETURN(0);
 456 }
 457
 458 static int old_init_ucred_reint(struct mdt_thread_info *info)
 459 {
 460         struct lu_ucred *uc = mdt_ucred(info);
 461         struct mdt_device  *mdt = info->mti_mdt;
 462         struct md_identity *identity = NULL;
 463
 464         ENTRY;
 465
 466         LASSERT(uc != NULL);
 467         uc->uc_valid = UCRED_INVALID;
 468         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 469         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 470         uc->uc_ginfo = NULL;
 471         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 472                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 473                                             uc->uc_fsuid);
 474                 if (IS_ERR(identity)) {
 475                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 476                                 identity = NULL;
 477                         } else {
 478                                 CDEBUG(D_SEC, "Deny access without identity: "
 479                                        "uid %u\n", uc->uc_fsuid);
 480                                 RETURN(-EACCES);
 481                         }
 482                 }
 483         }
 484         uc->uc_identity = identity;
 485
 486         /* process root_squash here. */
 487         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 488
 489         /* remove fs privilege for non-root user. */
 490         if (uc->uc_fsuid)
 491                 uc->uc_cap &= ~CFS_CAP_FS_MASK;
 492         uc->uc_valid = UCRED_OLD;
 493
 494         RETURN(0);
 495 }
 496
 497 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 498 {
 499         struct ptlrpc_request *req = mdt_info_req(info);
 500         struct lu_ucred       *uc  = mdt_ucred(info);
 501
 502         LASSERT(uc != NULL);
 503         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 504                 return 0;
 505
 506         mdt_exit_ucred(info);
 507
 508         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 509                 return old_init_ucred(info, body);
 510         else
 511                 return new_init_ucred(info, BODY_INIT, body);
 512 }
 513
 514 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 515 {
 516         struct ptlrpc_request *req = mdt_info_req(info);
 517         struct lu_ucred       *uc  = mdt_ucred(info);
 518
 519         LASSERT(uc != NULL);
 520         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 521                 return 0;
 522
 523         mdt_exit_ucred(info);
 524
 525         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 526                 return old_init_ucred_reint(info);
 527         else
 528                 return new_init_ucred(info, REC_INIT, NULL);
 529 }
 530
 531 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 532 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm)
 533 {
 534         const struct lov_ost_data_v1 *lod;
 535         int                           i;
 536         __u16                         count;
 537
 538         count = le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
 539
 540         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 541                POSTID(&lmm->lmm_oi), le32_to_cpu(lmm->lmm_magic),
 542                le32_to_cpu(lmm->lmm_pattern));
 543         CDEBUG(level,"stripe_size=0x%x, stripe_count=0x%x\n",
 544                le32_to_cpu(lmm->lmm_stripe_size), count);
 545         if (count == LOV_ALL_STRIPES ||
 546             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 547                 return;
 548
 549         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 550         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 551                 struct ost_id   oi;
 552                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 553                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 554                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 555         }
 556 }
 557
 558 /* Shrink and/or grow reply buffers */
 559 int mdt_fix_reply(struct mdt_thread_info *info)
 560 {
 561         struct req_capsule *pill = info->mti_pill;
 562         struct mdt_body    *body;
 563         int                md_size, md_packed = 0;
 564         int                acl_size;
 565         int                rc = 0;
 566         ENTRY;
 567
 568         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 569         LASSERT(body != NULL);
 570
 571         if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
 572                 md_size = body->eadatasize;
 573         else
 574                 md_size = 0;
 575
 576         acl_size = body->aclsize;
 577
 578         /* this replay - not send info to client */
 579         if (info->mti_spec.no_create) {
 580                 md_size = 0;
 581                 acl_size = 0;
 582         }
 583
 584         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
 585                         " MDSCAPA = %llx, OSSCAPA = %llx\n",
 586                         md_size, acl_size,
 587                         (unsigned long long)(body->valid & OBD_MD_FLMDSCAPA),
 588                         (unsigned long long)(body->valid & OBD_MD_FLOSSCAPA));
 589 /*
 590             &RMF_MDT_BODY,
 591             &RMF_MDT_MD,
 592             &RMF_ACL, or &RMF_LOGCOOKIES
 593 (optional)  &RMF_CAPA1,
 594 (optional)  &RMF_CAPA2,
 595 (optional)  something else
 596 */
 597
 598         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 599          * buffers before growing it */
 600         if (info->mti_big_lmm_used) {
 601                 LASSERT(req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER));
 602                 md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 603                                                  RCL_SERVER);
 604                 LASSERT(md_packed > 0);
 605                 /* buffer must be allocated separately */
 606                 LASSERT(info->mti_attr.ma_lmm !=
 607                         req_capsule_server_get(pill, &RMF_MDT_MD));
 608                 req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 609                 /* free big lmm if md_size is not needed */
 610                 if (md_size == 0)
 611                         info->mti_big_lmm_used = 0;
 612         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 613                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 614         }
 615
 616         if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
 617                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 618         else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
 619                 req_capsule_shrink(pill, &RMF_LOGCOOKIES,
 620                                    acl_size, RCL_SERVER);
 621
 622         if (req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 623             !(body->valid & OBD_MD_FLMDSCAPA))
 624                 req_capsule_shrink(pill, &RMF_CAPA1, 0, RCL_SERVER);
 625
 626         if (req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 627             !(body->valid & OBD_MD_FLOSSCAPA))
 628                 req_capsule_shrink(pill, &RMF_CAPA2, 0, RCL_SERVER);
 629
 630         /*
 631          * Some more field should be shrinked if needed.
 632          * This should be done by those who added fields to reply message.
 633          */
 634
 635         /* Grow MD buffer if needed finally */
 636         if (info->mti_big_lmm_used) {
 637                 void *lmm;
 638
 639                 LASSERT(md_size > md_packed);
 640                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 641                        md_size - md_packed);
 642                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 643                 if (rc) {
 644                         /* we can't answer with proper LOV EA, drop flags,
 645                          * the rc is also returned so this request is
 646                          * considered as failed */
 647                         body->valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 648                         /* don't return transno along with error */
 649                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 650                 } else {
 651                         /* now we need to pack right LOV EA */
 652                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 653                         LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 654                                                      RCL_SERVER) ==
 655                                 info->mti_attr.ma_lmm_size);
 656                         memcpy(lmm, info->mti_attr.ma_lmm,
 657                                info->mti_attr.ma_lmm_size);
 658                 }
 659                 /* update mdt_max_mdsize so clients will be aware about that */
 660                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 661                         info->mti_mdt->mdt_max_mdsize =
 662                                                     info->mti_attr.ma_lmm_size;
 663                 info->mti_big_lmm_used = 0;
 664         }
 665         RETURN(rc);
 666 }
 667
 668
 669 /* if object is dying, pack the lov/llog data,
 670  * parameter info->mti_attr should be valid at this point! */
 671 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 672                            const struct md_attr *ma)
 673 {
 674         struct mdt_body       *repbody;
 675         const struct lu_attr *la = &ma->ma_attr;
 676         int rc;
 677         ENTRY;
 678
 679         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 680         LASSERT(repbody != NULL);
 681
 682         if (ma->ma_valid & MA_INODE)
 683                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 684
 685         if (ma->ma_valid & MA_LOV) {
 686                 CERROR("No need in LOV EA upon unlink\n");
 687                 dump_stack();
 688         }
 689         repbody->eadatasize = 0;
 690
 691         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
 692                 repbody->aclsize = ma->ma_cookie_size;
 693                 repbody->valid |= OBD_MD_FLCOOKIE;
 694         }
 695
 696         if (info->mti_mdt->mdt_opts.mo_oss_capa &&
 697             exp_connect_flags(info->mti_exp) & OBD_CONNECT_OSS_CAPA &&
 698             repbody->valid & OBD_MD_FLEASIZE) {
 699                 struct lustre_capa *capa;
 700
 701                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
 702                 LASSERT(capa);
 703                 capa->lc_opc = CAPA_OPC_OSS_DESTROY;
 704                 rc = mo_capa_get(info->mti_env, mdt_object_child(mo), capa, 0);
 705                 if (rc)
 706                         RETURN(rc);
 707
 708                 repbody->valid |= OBD_MD_FLOSSCAPA;
 709         }
 710
 711         RETURN(0);
 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 & MDS_ATTR_MODE)
 721                 out |= LA_MODE;
 722         if (in & MDS_ATTR_UID)
 723                 out |= LA_UID;
 724         if (in & MDS_ATTR_GID)
 725                 out |= LA_GID;
 726         if (in & MDS_ATTR_SIZE)
 727                 out |= LA_SIZE;
 728         if (in & MDS_ATTR_BLOCKS)
 729                 out |= LA_BLOCKS;
 730         if (in & MDS_ATTR_ATIME_SET)
 731                 out |= LA_ATIME;
 732         if (in & MDS_ATTR_CTIME_SET)
 733                 out |= LA_CTIME;
 734         if (in & MDS_ATTR_MTIME_SET)
 735                 out |= LA_MTIME;
 736         if (in & MDS_ATTR_ATTR_FLAG)
 737                 out |= LA_FLAGS;
 738         if (in & MDS_ATTR_KILL_SUID)
 739                 out |= LA_KILL_SUID;
 740         if (in & MDS_ATTR_KILL_SGID)
 741                 out |= LA_KILL_SGID;
 742
 743         if (in & MDS_ATTR_FROM_OPEN)
 744                 rr->rr_flags |= MRF_OPEN_TRUNC;
 745         if (in & MDS_OPEN_OWNEROVERRIDE)
 746                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
 747         if (in & MDS_ATTR_FORCE)
 748                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 749
 750         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID |
 751                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
 752                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
 753                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
 754                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
 755                 MDS_ATTR_FROM_OPEN | MDS_OPEN_OWNEROVERRIDE);
 756         if (in != 0)
 757                 CERROR("Unknown attr bits: "LPX64"\n", in);
 758         return out;
 759 }
 760 /* unpacking */
 761
 762 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
 763 {
 764         struct lu_ucred         *uc  = mdt_ucred(info);
 765         struct md_attr          *ma = &info->mti_attr;
 766         struct lu_attr          *la = &ma->ma_attr;
 767         struct req_capsule      *pill = info->mti_pill;
 768         struct mdt_reint_record *rr = &info->mti_rr;
 769         struct mdt_rec_setattr  *rec;
 770         ENTRY;
 771
 772         CLASSERT(sizeof(struct mdt_rec_setattr)== sizeof(struct mdt_rec_reint));
 773         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 774         if (rec == NULL)
 775                 RETURN(-EFAULT);
 776
 777         /* This prior initialization is needed for old_init_ucred_reint() */
 778         uc->uc_fsuid = rec->sa_fsuid;
 779         uc->uc_fsgid = rec->sa_fsgid;
 780         uc->uc_cap   = rec->sa_cap;
 781         uc->uc_suppgids[0] = rec->sa_suppgid;
 782         uc->uc_suppgids[1] = -1;
 783
 784         rr->rr_fid1 = &rec->sa_fid;
 785         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
 786         /*  If MDS_ATTR_xTIME is set without MDS_ATTR_xTIME_SET and
 787          *  the client does not have OBD_CONNECT_FULL20, convert it
 788          *  to LA_xTIME. LU-3036 */
 789         if (!(exp_connect_flags(info->mti_exp) & OBD_CONNECT_FULL20)) {
 790                 if (!(rec->sa_valid & MDS_ATTR_ATIME_SET) &&
 791                      (rec->sa_valid & MDS_ATTR_ATIME))
 792                         la->la_valid |= LA_ATIME;
 793                 if (!(rec->sa_valid & MDS_ATTR_MTIME_SET) &&
 794                      (rec->sa_valid & MDS_ATTR_MTIME))
 795                         la->la_valid |= LA_MTIME;
 796                 if (!(rec->sa_valid & MDS_ATTR_CTIME_SET) &&
 797                      (rec->sa_valid & MDS_ATTR_CTIME))
 798                         la->la_valid |= LA_CTIME;
 799         }
 800         la->la_mode  = rec->sa_mode;
 801         la->la_flags = rec->sa_attr_flags;
 802         la->la_uid   = rec->sa_uid;
 803         la->la_gid   = rec->sa_gid;
 804         la->la_size  = rec->sa_size;
 805         la->la_blocks = rec->sa_blocks;
 806         la->la_ctime = rec->sa_ctime;
 807         la->la_atime = rec->sa_atime;
 808         la->la_mtime = rec->sa_mtime;
 809         ma->ma_valid = MA_INODE;
 810
 811         if (rec->sa_bias & MDS_DATA_MODIFIED)
 812                 ma->ma_attr_flags |= MDS_DATA_MODIFIED;
 813         else
 814                 ma->ma_attr_flags &= ~MDS_DATA_MODIFIED;
 815
 816         if (rec->sa_bias & MDS_HSM_RELEASE)
 817                 ma->ma_attr_flags |= MDS_HSM_RELEASE;
 818         else
 819                 ma->ma_attr_flags &= ~MDS_HSM_RELEASE;
 820
 821         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 822                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 823                                  req_capsule_client_get(pill, &RMF_CAPA1));
 824
 825         RETURN(0);
 826 }
 827
 828 static int mdt_ioepoch_unpack(struct mdt_thread_info *info)
 829 {
 830         struct req_capsule *pill = info->mti_pill;
 831         ENTRY;
 832
 833         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
 834                 info->mti_ioepoch =
 835                         req_capsule_client_get(pill, &RMF_MDT_EPOCH);
 836         else
 837                 info->mti_ioepoch = NULL;
 838         RETURN(info->mti_ioepoch == NULL ? -EFAULT : 0);
 839 }
 840
 841 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
 842         struct req_capsule      *pill = info->mti_pill;
 843
 844         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
 845                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
 846                 if (info->mti_dlm_req == NULL)
 847                         RETURN(-EFAULT);
 848         }
 849
 850         RETURN(0);
 851 }
 852
 853 static int mdt_setattr_unpack(struct mdt_thread_info *info)
 854 {
 855         struct mdt_reint_record *rr = &info->mti_rr;
 856         struct md_attr          *ma = &info->mti_attr;
 857         struct req_capsule      *pill = info->mti_pill;
 858         int rc;
 859         ENTRY;
 860
 861         rc = mdt_setattr_unpack_rec(info);
 862         if (rc)
 863                 RETURN(rc);
 864
 865         /* Epoch may be absent */
 866         mdt_ioepoch_unpack(info);
 867
 868         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
 869                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
 870                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
 871                                                         RCL_CLIENT);
 872                 ma->ma_lmm_size = rr->rr_eadatalen;
 873                 if (ma->ma_lmm_size > 0) {
 874                         ma->ma_lmm = (void *)rr->rr_eadata;
 875                         ma->ma_valid |= MA_LOV;
 876                 }
 877         }
 878
 879         rc = mdt_dlmreq_unpack(info);
 880         RETURN(rc);
 881 }
 882
 883 static int mdt_hsm_release_unpack(struct mdt_thread_info *info)
 884 {
 885         struct md_attr          *ma = &info->mti_attr;
 886         struct req_capsule      *pill = info->mti_pill;
 887         ENTRY;
 888
 889         if (!(ma->ma_attr_flags & MDS_HSM_RELEASE))
 890                 RETURN(0);
 891
 892         req_capsule_extend(pill, &RQF_MDS_RELEASE_CLOSE);
 893
 894         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
 895             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
 896                 RETURN(-EFAULT);
 897
 898         RETURN(0);
 899 }
 900
 901 int mdt_close_unpack(struct mdt_thread_info *info)
 902 {
 903         int rc;
 904         ENTRY;
 905
 906         rc = mdt_ioepoch_unpack(info);
 907         if (rc)
 908                 RETURN(rc);
 909
 910         rc = mdt_setattr_unpack_rec(info);
 911         if (rc)
 912                 RETURN(rc);
 913
 914         rc = mdt_hsm_release_unpack(info);
 915         if (rc)
 916                 RETURN(rc);
 917
 918         RETURN(mdt_init_ucred_reint(info));
 919 }
 920
 921 static int mdt_create_unpack(struct mdt_thread_info *info)
 922 {
 923         struct lu_ucred         *uc  = mdt_ucred(info);
 924         struct mdt_rec_create   *rec;
 925         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 926         struct mdt_reint_record *rr = &info->mti_rr;
 927         struct req_capsule      *pill = info->mti_pill;
 928         struct md_op_spec       *sp = &info->mti_spec;
 929         int rc;
 930         ENTRY;
 931
 932         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
 933         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 934         if (rec == NULL)
 935                 RETURN(-EFAULT);
 936
 937         /* This prior initialization is needed for old_init_ucred_reint() */
 938         uc->uc_fsuid = rec->cr_fsuid;
 939         uc->uc_fsgid = rec->cr_fsgid;
 940         uc->uc_cap   = rec->cr_cap;
 941         uc->uc_suppgids[0] = rec->cr_suppgid1;
 942         uc->uc_suppgids[1] = -1;
 943         uc->uc_umask = rec->cr_umask;
 944
 945         rr->rr_fid1 = &rec->cr_fid1;
 946         rr->rr_fid2 = &rec->cr_fid2;
 947         attr->la_mode = rec->cr_mode;
 948         attr->la_rdev  = rec->cr_rdev;
 949         attr->la_uid   = rec->cr_fsuid;
 950         attr->la_gid   = rec->cr_fsgid;
 951         attr->la_ctime = rec->cr_time;
 952         attr->la_mtime = rec->cr_time;
 953         attr->la_atime = rec->cr_time;
 954         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
 955                          LA_CTIME | LA_MTIME | LA_ATIME;
 956         memset(&sp->u, 0, sizeof(sp->u));
 957         sp->sp_cr_flags = get_mrc_cr_flags(rec);
 958
 959         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 960                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 961                                  req_capsule_client_get(pill, &RMF_CAPA1));
 962         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
 963
 964         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 965         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME,
 966                                               RCL_CLIENT) - 1;
 967         LASSERT(rr->rr_name && rr->rr_namelen > 0);
 968
 969         if (S_ISLNK(attr->la_mode)) {
 970                 const char *tgt = NULL;
 971
 972                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
 973                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
 974                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
 975                         sp->u.sp_symname = tgt;
 976                 }
 977                 if (tgt == NULL)
 978                         RETURN(-EFAULT);
 979         } else {
 980                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 981         }
 982
 983         rc = mdt_dlmreq_unpack(info);
 984         RETURN(rc);
 985 }
 986
 987 static int mdt_link_unpack(struct mdt_thread_info *info)
 988 {
 989         struct lu_ucred         *uc  = mdt_ucred(info);
 990         struct mdt_rec_link     *rec;
 991         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 992         struct mdt_reint_record *rr = &info->mti_rr;
 993         struct req_capsule      *pill = info->mti_pill;
 994         int rc;
 995         ENTRY;
 996
 997         CLASSERT(sizeof(struct mdt_rec_link) == sizeof(struct mdt_rec_reint));
 998         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
 999         if (rec == NULL)
1000                 RETURN(-EFAULT);
1001
1002         /* This prior initialization is needed for old_init_ucred_reint() */
1003         uc->uc_fsuid = rec->lk_fsuid;
1004         uc->uc_fsgid = rec->lk_fsgid;
1005         uc->uc_cap   = rec->lk_cap;
1006         uc->uc_suppgids[0] = rec->lk_suppgid1;
1007         uc->uc_suppgids[1] = rec->lk_suppgid2;
1008
1009         attr->la_uid = rec->lk_fsuid;
1010         attr->la_gid = rec->lk_fsgid;
1011         rr->rr_fid1 = &rec->lk_fid1;
1012         rr->rr_fid2 = &rec->lk_fid2;
1013         attr->la_ctime = rec->lk_time;
1014         attr->la_mtime = rec->lk_time;
1015         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1016
1017         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1018                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1019                                  req_capsule_client_get(pill, &RMF_CAPA1));
1020         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1021                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1022                                  req_capsule_client_get(pill, &RMF_CAPA2));
1023
1024         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1025         if (rr->rr_name == NULL)
1026                 RETURN(-EFAULT);
1027         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1028
1029         LASSERT(rr->rr_namelen > 0);
1030
1031         rc = mdt_dlmreq_unpack(info);
1032         RETURN(rc);
1033 }
1034
1035 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1036 {
1037         struct lu_ucred         *uc  = mdt_ucred(info);
1038         struct mdt_rec_unlink   *rec;
1039         struct md_attr          *ma = &info->mti_attr;
1040         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1041         struct mdt_reint_record *rr = &info->mti_rr;
1042         struct req_capsule      *pill = info->mti_pill;
1043         int rc;
1044         ENTRY;
1045
1046         CLASSERT(sizeof(struct mdt_rec_unlink) == sizeof(struct mdt_rec_reint));
1047         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1048         if (rec == NULL)
1049                 RETURN(-EFAULT);
1050
1051         /* This prior initialization is needed for old_init_ucred_reint() */
1052         uc->uc_fsuid = rec->ul_fsuid;
1053         uc->uc_fsgid = rec->ul_fsgid;
1054         uc->uc_cap   = rec->ul_cap;
1055         uc->uc_suppgids[0] = rec->ul_suppgid1;
1056         uc->uc_suppgids[1] = -1;
1057
1058         attr->la_uid = rec->ul_fsuid;
1059         attr->la_gid = rec->ul_fsgid;
1060         rr->rr_fid1 = &rec->ul_fid1;
1061         rr->rr_fid2 = &rec->ul_fid2;
1062         attr->la_ctime = rec->ul_time;
1063         attr->la_mtime = rec->ul_time;
1064         attr->la_mode  = rec->ul_mode;
1065         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1066
1067         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1068                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1069                                  req_capsule_client_get(pill, &RMF_CAPA1));
1070
1071         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1072         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1073         if (rr->rr_name == NULL || rr->rr_namelen == 0)
1074                 RETURN(-EFAULT);
1075
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_rmentry_unpack(struct mdt_thread_info *info)
1088 {
1089         info->mti_spec.sp_rm_entry = 1;
1090         return mdt_unlink_unpack(info);
1091 }
1092
1093 static int mdt_rename_unpack(struct mdt_thread_info *info)
1094 {
1095         struct lu_ucred         *uc = mdt_ucred(info);
1096         struct mdt_rec_rename   *rec;
1097         struct md_attr          *ma = &info->mti_attr;
1098         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1099         struct mdt_reint_record *rr = &info->mti_rr;
1100         struct req_capsule      *pill = info->mti_pill;
1101         int rc;
1102         ENTRY;
1103
1104         CLASSERT(sizeof(struct mdt_rec_rename) == sizeof(struct mdt_rec_reint));
1105         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1106         if (rec == NULL)
1107                 RETURN(-EFAULT);
1108
1109         /* This prior initialization is needed for old_init_ucred_reint() */
1110         uc->uc_fsuid = rec->rn_fsuid;
1111         uc->uc_fsgid = rec->rn_fsgid;
1112         uc->uc_cap   = rec->rn_cap;
1113         uc->uc_suppgids[0] = rec->rn_suppgid1;
1114         uc->uc_suppgids[1] = rec->rn_suppgid2;
1115
1116         attr->la_uid = rec->rn_fsuid;
1117         attr->la_gid = rec->rn_fsgid;
1118         rr->rr_fid1 = &rec->rn_fid1;
1119         rr->rr_fid2 = &rec->rn_fid2;
1120         attr->la_ctime = rec->rn_time;
1121         attr->la_mtime = rec->rn_time;
1122         /* rename_tgt contains the mode already */
1123         attr->la_mode = rec->rn_mode;
1124         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1125
1126         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1127                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1128                                  req_capsule_client_get(pill, &RMF_CAPA1));
1129         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1130                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1131                                  req_capsule_client_get(pill, &RMF_CAPA2));
1132
1133         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1134         rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1135         if (rr->rr_name == NULL || rr->rr_tgt == NULL)
1136                 RETURN(-EFAULT);
1137         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1138         rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
1139         LASSERT(rr->rr_namelen > 0 && rr->rr_tgtlen > 0);
1140
1141         if (rec->rn_bias & MDS_VTX_BYPASS)
1142                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1143         else
1144                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1145
1146         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1147
1148         rc = mdt_dlmreq_unpack(info);
1149         RETURN(rc);
1150 }
1151
1152 /*
1153  * please see comment above LOV_MAGIC_V1_DEF
1154  */
1155 static void mdt_fix_lov_magic(struct mdt_thread_info *info)
1156 {
1157         struct mdt_reint_record *rr = &info->mti_rr;
1158         struct lov_user_md_v1   *v1;
1159
1160         v1 = (void *)rr->rr_eadata;
1161         LASSERT(v1);
1162
1163         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1164                 if (v1->lmm_magic == LOV_USER_MAGIC_V1) {
1165                         v1->lmm_magic = LOV_MAGIC_V1_DEF;
1166                 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V1)) {
1167                         v1->lmm_magic = __swab32(LOV_MAGIC_V1_DEF);
1168                 } else if (v1->lmm_magic == LOV_USER_MAGIC_V3) {
1169                         v1->lmm_magic = LOV_MAGIC_V3_DEF;
1170                 } else if (v1->lmm_magic == __swab32(LOV_USER_MAGIC_V3)) {
1171                         v1->lmm_magic = __swab32(LOV_MAGIC_V3_DEF);
1172                 }
1173         }
1174 }
1175
1176 static int mdt_open_unpack(struct mdt_thread_info *info)
1177 {
1178         struct lu_ucred         *uc = mdt_ucred(info);
1179         struct mdt_rec_create   *rec;
1180         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1181         struct req_capsule      *pill = info->mti_pill;
1182         struct mdt_reint_record *rr   = &info->mti_rr;
1183         struct ptlrpc_request   *req  = mdt_info_req(info);
1184         struct md_op_spec       *sp   = &info->mti_spec;
1185         ENTRY;
1186
1187         CLASSERT(sizeof(struct mdt_rec_create) == sizeof(struct mdt_rec_reint));
1188         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1189         if (rec == NULL)
1190                 RETURN(-EFAULT);
1191
1192         /* This prior initialization is needed for old_init_ucred_reint() */
1193         uc->uc_fsuid = rec->cr_fsuid;
1194         uc->uc_fsgid = rec->cr_fsgid;
1195         uc->uc_cap   = rec->cr_cap;
1196         uc->uc_suppgids[0] = rec->cr_suppgid1;
1197         uc->uc_suppgids[1] = rec->cr_suppgid2;
1198         uc->uc_umask = rec->cr_umask;
1199
1200         rr->rr_fid1   = &rec->cr_fid1;
1201         rr->rr_fid2   = &rec->cr_fid2;
1202         rr->rr_handle = &rec->cr_old_handle;
1203         attr->la_mode = rec->cr_mode;
1204         attr->la_rdev  = rec->cr_rdev;
1205         attr->la_uid   = rec->cr_fsuid;
1206         attr->la_gid   = rec->cr_fsgid;
1207         attr->la_ctime = rec->cr_time;
1208         attr->la_mtime = rec->cr_time;
1209         attr->la_atime = rec->cr_time;
1210         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1211                          LA_CTIME | LA_MTIME | LA_ATIME;
1212         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1213         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1214         /* Do not trigger ASSERTION if client miss to set such flags. */
1215         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1216                 RETURN(-EPROTO);
1217         info->mti_replayepoch = rec->cr_ioepoch;
1218
1219         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1220
1221         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1222                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1223                                  req_capsule_client_get(pill, &RMF_CAPA1));
1224         if (req_is_replay(req) &&
1225             req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT)) {
1226 #if 0
1227                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1228                                  req_capsule_client_get(pill, &RMF_CAPA2));
1229 #else
1230                 /*
1231                  * FIXME: capa in replay open request might have expired,
1232                  * bypass capa check. Security hole?
1233                  */
1234                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1235                 mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1236 #endif
1237         }
1238
1239         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1240         if (rr->rr_name == NULL)
1241                 RETURN(-EFAULT);
1242         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1243
1244         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1245                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1246                                                         RCL_CLIENT);
1247                 if (rr->rr_eadatalen > 0) {
1248                         rr->rr_eadata = req_capsule_client_get(pill,
1249                                                                &RMF_EADATA);
1250                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1251                         sp->u.sp_ea.eadata = rr->rr_eadata;
1252                         sp->no_create = !!req_is_replay(req);
1253                         mdt_fix_lov_magic(info);
1254                 }
1255
1256                 /*
1257                  * Client default md_size may be 0 right after client start,
1258                  * until all osc are connected, set here just some reasonable
1259                  * value to prevent misbehavior.
1260                  */
1261                 if (rr->rr_eadatalen == 0 &&
1262                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1263                         rr->rr_eadatalen = MIN_MD_SIZE;
1264         }
1265
1266         RETURN(0);
1267 }
1268
1269 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1270 {
1271         struct mdt_reint_record   *rr   = &info->mti_rr;
1272         struct lu_ucred           *uc   = mdt_ucred(info);
1273         struct lu_attr            *attr = &info->mti_attr.ma_attr;
1274         struct req_capsule        *pill = info->mti_pill;
1275         struct mdt_rec_setxattr   *rec;
1276         ENTRY;
1277
1278
1279         CLASSERT(sizeof(struct mdt_rec_setxattr) ==
1280                          sizeof(struct mdt_rec_reint));
1281
1282         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1283         if (rec == NULL)
1284                 RETURN(-EFAULT);
1285
1286         /* This prior initialization is needed for old_init_ucred_reint() */
1287         uc->uc_fsuid  = rec->sx_fsuid;
1288         uc->uc_fsgid  = rec->sx_fsgid;
1289         uc->uc_cap    = rec->sx_cap;
1290         uc->uc_suppgids[0] = rec->sx_suppgid1;
1291         uc->uc_suppgids[1] = -1;
1292
1293         rr->rr_opcode = rec->sx_opcode;
1294         rr->rr_fid1   = &rec->sx_fid;
1295         attr->la_valid = rec->sx_valid;
1296         attr->la_ctime = rec->sx_time;
1297         attr->la_size = rec->sx_size;
1298         attr->la_flags = rec->sx_flags;
1299
1300         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1301                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1302                                  req_capsule_client_get(pill, &RMF_CAPA1));
1303         else
1304                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1305
1306         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1307         if (rr->rr_name == NULL)
1308                 RETURN(-EFAULT);
1309         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1310         LASSERT(rr->rr_namelen > 0);
1311
1312         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1313                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1314                                                         RCL_CLIENT);
1315                 if (rr->rr_eadatalen > 0) {
1316                         rr->rr_eadata = req_capsule_client_get(pill,
1317                                                                &RMF_EADATA);
1318                         if (rr->rr_eadata == NULL)
1319                                 RETURN(-EFAULT);
1320                 } else {
1321                         rr->rr_eadata = NULL;
1322                 }
1323         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1324                 CDEBUG(D_INFO, "no xattr data supplied\n");
1325                 RETURN(-EFAULT);
1326         }
1327
1328         RETURN(0);
1329 }
1330
1331
1332 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1333
1334 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1335         [REINT_SETATTR]  = mdt_setattr_unpack,
1336         [REINT_CREATE]   = mdt_create_unpack,
1337         [REINT_LINK]     = mdt_link_unpack,
1338         [REINT_UNLINK]   = mdt_unlink_unpack,
1339         [REINT_RENAME]   = mdt_rename_unpack,
1340         [REINT_OPEN]     = mdt_open_unpack,
1341         [REINT_SETXATTR] = mdt_setxattr_unpack,
1342         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1343 };
1344
1345 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1346 {
1347         int rc;
1348         ENTRY;
1349
1350         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1351         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1352                 info->mti_rr.rr_opcode = op;
1353                 rc = mdt_reint_unpackers[op](info);
1354         } else {
1355                 CERROR("Unexpected opcode %d\n", op);
1356                 rc = -EFAULT;
1357         }
1358         RETURN(rc);
1359 }