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  *  lustre/mdt/mdt_lib.c
   5  *  Lustre Metadata Target (mdt) request unpacking helper.
   6  *
   7  *  Copyright (c) 2006 Cluster File Systems, Inc.
   8  *   Author: Peter Braam <braam@clusterfs.com>
   9  *   Author: Andreas Dilger <adilger@clusterfs.com>
  10  *   Author: Phil Schwan <phil@clusterfs.com>
  11  *   Author: Mike Shaver <shaver@clusterfs.com>
  12  *   Author: Nikita Danilov <nikita@clusterfs.com>
  13  *   Author: Huang Hua <huanghua@clusterfs.com>
  14  *
  15  *
  16  *   This file is part of the Lustre file system, http://www.lustre.org
  17  *   Lustre is a trademark of Cluster File Systems, Inc.
  18  *
  19  *   You may have signed or agreed to another license before downloading
  20  *   this software.  If so, you are bound by the terms and conditions
  21  *   of that agreement, and the following does not apply to you.  See the
  22  *   LICENSE file included with this distribution for more information.
  23  *
  24  *   If you did not agree to a different license, then this copy of Lustre
  25  *   is open source software; you can redistribute it and/or modify it
  26  *   under the terms of version 2 of the GNU General Public License as
  27  *   published by the Free Software Foundation.
  28  *
  29  *   In either case, Lustre is distributed in the hope that it will be
  30  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  31  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  *   license text for more details.
  33  */
  34
  35
  36 #ifndef EXPORT_SYMTAB
  37 # define EXPORT_SYMTAB
  38 #endif
  39 #define DEBUG_SUBSYSTEM S_MDS
  40
  41 #include "mdt_internal.h"
  42
  43
  44 typedef enum ucred_init_type {
  45         NONE_INIT       = 0,
  46         BODY_INIT       = 1,
  47         REC_INIT        = 2
  48 } ucred_init_type_t;
  49
  50 int groups_from_list(struct group_info *ginfo, gid_t *glist)
  51 {
  52         int i;
  53         int count = ginfo->ngroups;
  54
  55         /* fill group_info from gid array */
  56         for (i = 0; i < ginfo->nblocks; i++) {
  57                 int cp_count = min(NGROUPS_PER_BLOCK, count);
  58                 int off = i * NGROUPS_PER_BLOCK;
  59                 int len = cp_count * sizeof(*glist);
  60
  61                 if (memcpy(ginfo->blocks[i], glist + off, len))
  62                         return -EFAULT;
  63
  64                 count -= cp_count;
  65         }
  66         return 0;
  67 }
  68
  69 /* groups_sort() is copied from linux kernel! */
  70 /* a simple shell-metzner sort */
  71 void groups_sort(struct group_info *group_info)
  72 {
  73         int base, max, stride;
  74         int gidsetsize = group_info->ngroups;
  75
  76         for (stride = 1; stride < gidsetsize; stride = 3 * stride + 1)
  77                 ; /* nothing */
  78         stride /= 3;
  79
  80         while (stride) {
  81                 max = gidsetsize - stride;
  82                 for (base = 0; base < max; base++) {
  83                         int left = base;
  84                         int right = left + stride;
  85                         gid_t tmp = GROUP_AT(group_info, right);
  86
  87                         while (left >= 0 && GROUP_AT(group_info, left) > tmp) {
  88                                 GROUP_AT(group_info, right) =
  89                                     GROUP_AT(group_info, left);
  90                                 right = left;
  91                                 left -= stride;
  92                         }
  93                         GROUP_AT(group_info, right) = tmp;
  94                 }
  95                 stride /= 3;
  96         }
  97 }
  98
  99 void mdt_exit_ucred(struct mdt_thread_info *info)
 100 {
 101         struct md_ucred   *uc  = mdt_ucred(info);
 102         struct mdt_device *mdt = info->mti_mdt;
 103
 104         if (uc->mu_valid != UCRED_INIT) {
 105                 uc->mu_suppgids[0] = uc->mu_suppgids[1] = -1;
 106                 if (uc->mu_ginfo) {
 107                         groups_free(uc->mu_ginfo);
 108                         uc->mu_ginfo = NULL;
 109                 }
 110                 if (uc->mu_identity) {
 111                         mdt_identity_put(mdt->mdt_identity_cache,
 112                                          uc->mu_identity);
 113                         uc->mu_identity = NULL;
 114                 }
 115                 uc->mu_valid = UCRED_INIT;
 116         }
 117 }
 118
 119 static int old_init_ucred(struct mdt_thread_info *info,
 120                           struct mdt_body *body)
 121 {
 122         struct md_ucred     *uc  = mdt_ucred(info);
 123         struct mdt_device   *mdt = info->mti_mdt;
 124         struct mdt_identity *identity = NULL;
 125
 126         ENTRY;
 127
 128         uc->mu_valid = UCRED_INVALID;
 129
 130         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 131                 /* get identity info of this user */
 132                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 133                                             body->fsuid);
 134                 if (!identity) {
 135                         CERROR("Deny access without identity: uid %d\n",
 136                                body->fsuid);
 137                         RETURN(-EACCES);
 138                 }
 139         }
 140
 141         uc->mu_valid = UCRED_OLD;
 142         uc->mu_squash = SQUASH_NONE;
 143         uc->mu_o_uid = uc->mu_uid = body->uid;
 144         uc->mu_o_gid = uc->mu_gid = body->gid;
 145         uc->mu_o_fsuid = uc->mu_fsuid = body->fsuid;
 146         uc->mu_o_fsgid = uc->mu_fsgid = body->fsgid;
 147         uc->mu_suppgids[0] = body->suppgid;
 148         uc->mu_suppgids[1] = -1;
 149         if (uc->mu_fsuid)
 150                 uc->mu_cap = body->capability & ~CAP_FS_MASK;
 151         else
 152                 uc->mu_cap = body->capability;
 153         uc->mu_ginfo = NULL;
 154         uc->mu_identity = identity;
 155
 156         RETURN(0);
 157 }
 158
 159 static int old_init_ucred_reint(struct mdt_thread_info *info)
 160 {
 161         struct md_ucred     *uc  = mdt_ucred(info);
 162         struct mdt_device   *mdt = info->mti_mdt;
 163         struct mdt_identity *identity = NULL;
 164
 165         ENTRY;
 166
 167         uc->mu_valid = UCRED_INVALID;
 168
 169         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 170                 /* get identity info of this user */
 171                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 172                                             uc->mu_fsuid);
 173                 if (!identity) {
 174                         CERROR("Deny access without identity: uid %d\n",
 175                                uc->mu_fsuid);
 176                         RETURN(-EACCES);
 177                 }
 178         }
 179
 180         uc->mu_valid = UCRED_OLD;
 181         uc->mu_squash = SQUASH_NONE;
 182         uc->mu_o_uid = uc->mu_o_fsuid = uc->mu_uid = uc->mu_fsuid;
 183         uc->mu_o_gid = uc->mu_o_fsgid = uc->mu_gid = uc->mu_fsgid;
 184         if (uc->mu_fsuid)
 185                 uc->mu_cap &= ~CAP_FS_MASK;
 186         uc->mu_ginfo = NULL;
 187         uc->mu_identity = identity;
 188
 189         RETURN(0);
 190 }
 191
 192 static int nid_nosquash(struct mdt_device *mdt, lnet_nid_t nid)
 193 {
 194         struct rootsquash_info *rsi = mdt->mdt_rootsquash_info;
 195         int i;
 196
 197         for (i = 0; i < rsi->rsi_n_nosquash_nids; i++)
 198                 if ((rsi->rsi_nosquash_nids[i] == nid) ||
 199                     (rsi->rsi_nosquash_nids[i] == LNET_NID_ANY))
 200                         return 1;
 201
 202         return 0;
 203 }
 204
 205 static int mdt_squash_root(struct mdt_device *mdt, struct md_ucred *ucred,
 206                            struct ptlrpc_user_desc *pud, lnet_nid_t peernid)
 207 {
 208         struct rootsquash_info *rsi = mdt->mdt_rootsquash_info;
 209
 210         if (!rsi || (!rsi->rsi_uid && !rsi->rsi_gid) ||
 211             nid_nosquash(mdt, peernid))
 212                 return 0;
 213
 214         CDEBUG(D_SEC, "squash req from "LPX64":"
 215                "(%u:%u-%u:%u/%x)=>(%u:%u-%u:%u/%x)\n", peernid,
 216                pud->pud_uid, pud->pud_gid,
 217                pud->pud_fsuid, pud->pud_fsgid, pud->pud_cap,
 218                pud->pud_uid ? pud->pud_uid : rsi->rsi_uid,
 219                pud->pud_uid ? pud->pud_gid : rsi->rsi_gid,
 220                pud->pud_fsuid ? pud->pud_fsuid : rsi->rsi_uid,
 221                pud->pud_fsuid ? pud->pud_fsgid : rsi->rsi_gid,
 222                pud->pud_cap & ~CAP_FS_MASK);
 223
 224         if (rsi->rsi_uid) {
 225                 if (!pud->pud_uid) {
 226                         ucred->mu_uid = rsi->rsi_uid;
 227                         ucred->mu_squash |= SQUASH_UID;
 228                 } else {
 229                         ucred->mu_uid = pud->pud_uid;
 230                 }
 231
 232                 if (!pud->pud_fsuid) {
 233                         ucred->mu_fsuid = rsi->rsi_uid;
 234                         ucred->mu_squash |= SQUASH_UID;
 235                 } else {
 236                         ucred->mu_fsuid = pud->pud_fsuid;
 237                 }
 238         } else {
 239                 ucred->mu_uid   = pud->pud_uid;
 240                 ucred->mu_fsuid = pud->pud_fsuid;
 241         }
 242
 243         if (rsi->rsi_gid) {
 244                 int i;
 245
 246                 if (!pud->pud_gid) {
 247                         ucred->mu_gid = rsi->rsi_gid;
 248                         ucred->mu_squash |= SQUASH_GID;
 249                 } else {
 250                         ucred->mu_gid = pud->pud_gid;
 251                 }
 252
 253                 if (!pud->pud_fsgid) {
 254                         ucred->mu_fsgid = rsi->rsi_gid;
 255                         ucred->mu_squash |= SQUASH_GID;
 256                 } else {
 257                         ucred->mu_fsgid = pud->pud_fsgid;
 258                 }
 259
 260                 for (i = 0; i < 2; i++) {
 261                         if (!ucred->mu_suppgids[i]) {
 262                                 ucred->mu_suppgids[i] = rsi->rsi_gid;
 263                                 ucred->mu_squash |= SQUASH_GID;
 264                         }
 265                 }
 266
 267                 for (i = 0; i < pud->pud_ngroups; i++) {
 268                         if (!pud->pud_groups[i]) {
 269                                 pud->pud_groups[i] = rsi->rsi_gid;
 270                                 ucred->mu_squash |= SQUASH_GID;
 271                         }
 272                 }
 273         } else {
 274                 ucred->mu_gid   = pud->pud_gid;
 275                 ucred->mu_fsgid = pud->pud_fsgid;
 276         }
 277
 278         return 1;
 279 }
 280
 281 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 282                           void *buf)
 283 {
 284         struct ptlrpc_request   *req = mdt_info_req(info);
 285         struct mdt_export_data  *med = mdt_req2med(req);
 286         struct mdt_device       *mdt = info->mti_mdt;
 287         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 288         struct md_ucred         *ucred = mdt_ucred(info);
 289         struct mdt_identity     *identity = NULL;
 290         lnet_nid_t              peernid = req->rq_peer.nid;
 291         __u32                   setxid_perm = 0;
 292         int                     setuid;
 293         int                     setgid;
 294         int                     rc = 0;
 295
 296         ENTRY;
 297
 298         LASSERT(req->rq_auth_gss);
 299         LASSERT(!req->rq_auth_usr_mdt);
 300         LASSERT(req->rq_user_desc);
 301
 302         ucred->mu_valid = UCRED_INVALID;
 303
 304         ucred->mu_o_uid   = pud->pud_uid;
 305         ucred->mu_o_gid   = pud->pud_gid;
 306         ucred->mu_o_fsuid = pud->pud_fsuid;
 307         ucred->mu_o_fsgid = pud->pud_fsgid;
 308
 309         if (type == BODY_INIT) {
 310                 struct mdt_body *body = (struct mdt_body *)buf;
 311
 312                 ucred->mu_suppgids[0] = body->suppgid;
 313                 ucred->mu_suppgids[1] = -1;
 314         }
 315
 316         /* sanity check: we expect the uid which client claimed is true */
 317         if (med->med_rmtclient) {
 318                 if (req->rq_auth_mapped_uid == INVALID_UID) {
 319                         CWARN("remote user not mapped, deny access!\n");
 320                         RETURN(-EACCES);
 321                 }
 322
 323                 if (ptlrpc_user_desc_do_idmap(req, pud))
 324                         RETURN(-EACCES);
 325
 326                 if (req->rq_auth_mapped_uid != pud->pud_uid) {
 327                         CERROR("remote client "LPU64": auth uid %u "
 328                                "while client claim %u:%u/%u:%u\n",
 329                                peernid, req->rq_auth_uid, pud->pud_uid,
 330                                pud->pud_gid, pud->pud_fsuid, pud->pud_fsgid);
 331                         RETURN(-EACCES);
 332                 }
 333         } else {
 334                 if (req->rq_auth_uid != pud->pud_uid) {
 335                         CERROR("local client "LPU64": auth uid %u "
 336                                "while client claim %u:%u/%u:%u\n",
 337                                peernid, req->rq_auth_uid, pud->pud_uid,
 338                                pud->pud_gid, pud->pud_fsuid, pud->pud_fsgid);
 339                         RETURN(-EACCES);
 340                 }
 341         }
 342
 343         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 344                 if (med->med_rmtclient) {
 345                         CERROR("remote client must run with identity_get "
 346                                "enabled!\n");
 347                         RETURN(-EACCES);
 348                 } else {
 349                         setxid_perm |= LUSTRE_SETGRP_PERM;
 350                         goto check_squash;
 351                 }
 352         }
 353
 354         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 355         if (!identity) {
 356                 CERROR("Deny access without identity: uid %d\n", pud->pud_uid);
 357                 RETURN(-EACCES);
 358         }
 359
 360         setxid_perm = mdt_identity_get_setxid_perm(identity,
 361                                                    med->med_rmtclient,
 362                                                    peernid);
 363
 364         /* find out the setuid/setgid attempt */
 365         setuid = (pud->pud_uid != pud->pud_fsuid);
 366         setgid = (pud->pud_gid != pud->pud_fsgid ||
 367                   pud->pud_gid != identity->mi_gid);
 368
 369         /* check permission of setuid */
 370         if (setuid && !(setxid_perm & LUSTRE_SETUID_PERM)) {
 371                 CWARN("mdt blocked setuid attempt (%u -> %u) from "
 372                       LPX64"\n", pud->pud_uid, pud->pud_fsuid, peernid);
 373                 GOTO(out, rc = -EACCES);
 374         }
 375
 376         /* check permission of setgid */
 377         if (setgid && !(setxid_perm & LUSTRE_SETGID_PERM)) {
 378                 CWARN("mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 379                       "from "LPX64"\n", pud->pud_uid, pud->pud_gid,
 380                       pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 381                       peernid);
 382                 GOTO(out, rc = -EACCES);
 383         }
 384
 385 check_squash:
 386         /* FIXME: The exact behavior of root_squash is not defined. */
 387         ucred->mu_squash = SQUASH_NONE;
 388         if (mdt_squash_root(mdt, ucred, pud, peernid) == 0) {
 389                 ucred->mu_uid   = pud->pud_uid;
 390                 ucred->mu_gid   = pud->pud_gid;
 391                 ucred->mu_fsuid = pud->pud_fsuid;
 392                 ucred->mu_fsgid = pud->pud_fsgid;
 393         }
 394
 395         /* remove fs privilege for non-root user */
 396         if (ucred->mu_fsuid)
 397                 ucred->mu_cap = pud->pud_cap & ~CAP_FS_MASK;
 398         else
 399                 ucred->mu_cap = pud->pud_cap;
 400
 401         /*
 402          * NB: remote client not allowed to setgroups anyway.
 403          */
 404         if (!med->med_rmtclient && pud->pud_ngroups &&
 405             (setxid_perm & LUSTRE_SETGRP_PERM)) {
 406                 struct group_info *ginfo;
 407
 408                 /* setgroups for local client */
 409                 ginfo = groups_alloc(pud->pud_ngroups);
 410                 if (!ginfo) {
 411                         CERROR("failed to alloc %d groups\n",
 412                                pud->pud_ngroups);
 413                         GOTO(out, rc = -ENOMEM);
 414                 }
 415                 groups_from_list(ginfo, pud->pud_groups);
 416                 groups_sort(ginfo);
 417                 ucred->mu_ginfo = ginfo;
 418         } else {
 419                 ucred->mu_ginfo = NULL;
 420         }
 421
 422         ucred->mu_identity = identity;
 423         ucred->mu_valid = UCRED_NEW;
 424
 425         EXIT;
 426
 427 out:
 428         if (rc && identity)
 429                 mdt_identity_put(mdt->mdt_identity_cache, identity);
 430
 431         return rc;
 432 }
 433
 434 int mdt_check_ucred(struct mdt_thread_info *info)
 435 {
 436         struct ptlrpc_request   *req = mdt_info_req(info);
 437         struct mdt_export_data  *med = mdt_req2med(req);
 438         struct mdt_device       *mdt = info->mti_mdt;
 439         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 440         struct md_ucred         *ucred = mdt_ucred(info);
 441         struct mdt_identity     *identity;
 442         lnet_nid_t              peernid = req->rq_peer.nid;
 443
 444         ENTRY;
 445
 446         if ((ucred->mu_valid == UCRED_OLD) || (ucred->mu_valid == UCRED_NEW))
 447                 RETURN(0);
 448
 449         if (!req->rq_user_desc)
 450                 RETURN(0);
 451
 452         /* sanity check: if we use strong authentication, we expect the
 453          * uid which client claimed is true */
 454         if (req->rq_auth_gss) {
 455                 if (med->med_rmtclient) {
 456                         if (req->rq_auth_mapped_uid == INVALID_UID) {
 457                                 CWARN("remote user not mapped, deny access!\n");
 458                                 RETURN(-EACCES);
 459                         }
 460
 461                         if (ptlrpc_user_desc_do_idmap(req, pud))
 462                                 RETURN(-EACCES);
 463
 464                         if (req->rq_auth_mapped_uid != pud->pud_uid) {
 465                                 CERROR("remote client "LPU64": auth uid %u "
 466                                        "while client claim %u:%u/%u:%u\n",
 467                                        peernid, req->rq_auth_uid, pud->pud_uid,
 468                                        pud->pud_gid, pud->pud_fsuid,
 469                                        pud->pud_fsgid);
 470                                 RETURN(-EACCES);
 471                         }
 472                 } else {
 473                         if (req->rq_auth_uid != pud->pud_uid) {
 474                                 CERROR("local client "LPU64": auth uid %u "
 475                                        "while client claim %u:%u/%u:%u\n",
 476                                        peernid, req->rq_auth_uid, pud->pud_uid,
 477                                        pud->pud_gid, pud->pud_fsuid,
 478                                        pud->pud_fsgid);
 479                                 RETURN(-EACCES);
 480                         }
 481                 }
 482         }
 483
 484         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 485                 if (med->med_rmtclient) {
 486                         CERROR("remote client must run with "
 487                                "identity_get enabled!\n");
 488                         RETURN(-EACCES);
 489                 }
 490         } else {
 491                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 492                                             pud->pud_uid);
 493                 if (!identity) {
 494                         CERROR("Deny access without identity: uid %d\n",
 495                                pud->pud_uid);
 496                         RETURN(-EACCES);
 497                 }
 498
 499                 mdt_identity_put(mdt->mdt_identity_cache, identity);
 500         }
 501
 502         RETURN(0);
 503 }
 504
 505 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 506 {
 507         struct ptlrpc_request *req = mdt_info_req(info);
 508         struct md_ucred       *uc  = mdt_ucred(info);
 509
 510         if ((uc->mu_valid == UCRED_OLD) || (uc->mu_valid == UCRED_NEW))
 511                 return 0;
 512
 513         mdt_exit_ucred(info);
 514
 515         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 516                 return old_init_ucred(info, body);
 517         else
 518                 return new_init_ucred(info, BODY_INIT, body);
 519 }
 520
 521 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 522 {
 523         struct ptlrpc_request *req = mdt_info_req(info);
 524         struct md_ucred       *uc  = mdt_ucred(info);
 525
 526         if ((uc->mu_valid == UCRED_OLD) || (uc->mu_valid == UCRED_NEW))
 527                 return 0;
 528
 529         mdt_exit_ucred(info);
 530
 531         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 532                 return old_init_ucred_reint(info);
 533         else
 534                 return new_init_ucred(info, REC_INIT, NULL);
 535 }
 536
 537 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 538 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm)
 539 {
 540         const struct lov_ost_data_v1 *lod;
 541         int i;
 542         __s16 stripe_count =
 543                 le16_to_cpu(((struct lov_user_md*)lmm)->lmm_stripe_count);
 544
 545         CDEBUG(level, "objid "LPX64", magic 0x%08X, pattern %#X\n",
 546                le64_to_cpu(lmm->lmm_object_id), le32_to_cpu(lmm->lmm_magic),
 547                le32_to_cpu(lmm->lmm_pattern));
 548         CDEBUG(level,"stripe_size=0x%x, stripe_count=0x%x\n",
 549                le32_to_cpu(lmm->lmm_stripe_size),
 550                le32_to_cpu(lmm->lmm_stripe_count));
 551         LASSERT(stripe_count <= (__s16)LOV_MAX_STRIPE_COUNT);
 552         for (i = 0, lod = lmm->lmm_objects; i < stripe_count; i++, lod++) {
 553                 CDEBUG(level, "stripe %u idx %u subobj "LPX64"/"LPX64"\n",
 554                        i, le32_to_cpu(lod->l_ost_idx),
 555                        le64_to_cpu(lod->l_object_gr),
 556                        le64_to_cpu(lod->l_object_id));
 557         }
 558 }
 559
 560 void mdt_shrink_reply(struct mdt_thread_info *info)
 561 {
 562         struct req_capsule    *pill = &info->mti_pill;
 563         struct mdt_body       *body;
 564         int acl_size, md_size, adjust = 0;
 565         ENTRY;
 566
 567         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 568         LASSERT(body != NULL);
 569
 570         if (body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE | OBD_MD_LINKNAME))
 571                 md_size = body->eadatasize;
 572         else
 573                 md_size = 0;
 574
 575         acl_size = body->aclsize;
 576
 577         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d"
 578                         " MDSCAPA = %d, OSSCAPA = %d\n",
 579                         md_size, acl_size,
 580                         (int)(body->valid & OBD_MD_FLMDSCAPA),
 581                         (int)(body->valid & OBD_MD_FLOSSCAPA));
 582 /*
 583             &RMF_MDT_BODY,
 584             &RMF_MDT_MD,
 585             &RMF_ACL, or &RMF_LOGCOOKIES
 586 (optional)  &RMF_CAPA1,
 587 (optional)  &RMF_CAPA2,
 588 (optional)  something else
 589 */
 590         adjust += req_capsule_shrink(pill, &RMF_MDT_MD,
 591                                     md_size, adjust, 1);
 592
 593         if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER))
 594                 adjust += req_capsule_shrink(pill, &RMF_ACL,
 595                                             acl_size, adjust, 1);
 596         else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER))
 597                 adjust += req_capsule_shrink(pill, &RMF_LOGCOOKIES,
 598                                             acl_size, adjust, 1);
 599
 600         if ((req_capsule_has_field(pill, &RMF_CAPA1, RCL_SERVER) &&
 601                !(body->valid & OBD_MD_FLMDSCAPA)))
 602                 adjust += req_capsule_shrink(pill, &RMF_CAPA1, 0, adjust, 1);
 603
 604         if ((req_capsule_has_field(pill, &RMF_CAPA2, RCL_SERVER) &&
 605                 !(body->valid & OBD_MD_FLOSSCAPA)))
 606                 adjust += req_capsule_shrink(pill, &RMF_CAPA2, 0, adjust, 0);
 607
 608         /*
 609          * Some more field should be shrinked if needed.
 610          * This should be done by those who added fields to reply message.
 611          */
 612         EXIT;
 613 }
 614
 615
 616 /* if object is dying, pack the lov/llog data,
 617  * parameter info->mti_attr should be valid at this point! */
 618 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 619                            const struct md_attr *ma)
 620 {
 621         struct mdt_body       *repbody;
 622         const struct lu_attr *la = &ma->ma_attr;
 623         ENTRY;
 624
 625         repbody = req_capsule_server_get(&info->mti_pill, &RMF_MDT_BODY);
 626         LASSERT(repbody != NULL);
 627
 628         if (ma->ma_valid & MA_INODE)
 629                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 630
 631         if (ma->ma_valid & MA_LOV) {
 632                 __u32 mode;
 633
 634                 if (mdt_object_exists(mo) < 0)
 635                         /* If it is a remote object, and we do not retrieve
 636                          * EA back unlink reg file*/
 637                         mode = S_IFREG;
 638                 else
 639                         mode = lu_object_attr(&mo->mot_obj.mo_lu);
 640
 641                 LASSERT(ma->ma_lmm_size);
 642                 mdt_dump_lmm(D_INFO, ma->ma_lmm);
 643                 repbody->eadatasize = ma->ma_lmm_size;
 644                 if (S_ISREG(mode))
 645                         repbody->valid |= OBD_MD_FLEASIZE;
 646                 else if (S_ISDIR(mode))
 647                         repbody->valid |= OBD_MD_FLDIREA;
 648                 else
 649                         LBUG();
 650         }
 651
 652         if (ma->ma_cookie_size && (ma->ma_valid & MA_COOKIE)) {
 653                 repbody->aclsize = ma->ma_cookie_size;
 654                 repbody->valid |= OBD_MD_FLCOOKIE;
 655         }
 656
 657         RETURN(0);
 658 }
 659
 660 static __u64 mdt_attr_valid_xlate(__u64 in, struct mdt_reint_record *rr,
 661                                   struct md_attr *ma)
 662 {
 663         __u64 out;
 664
 665         out = 0;
 666         if (in & ATTR_MODE)
 667                 out |= LA_MODE;
 668         if (in & ATTR_UID)
 669                 out |= LA_UID;
 670         if (in & ATTR_GID)
 671                 out |= LA_GID;
 672         if (in & ATTR_SIZE)
 673                 out |= LA_SIZE;
 674         if (in & ATTR_BLOCKS)
 675                 out |= LA_BLOCKS;
 676
 677         if (in & ATTR_FROM_OPEN)
 678                 rr->rr_flags |= MRF_SETATTR_LOCKED;
 679
 680         if (in & ATTR_ATIME_SET)
 681                 out |= LA_ATIME;
 682
 683         if (in & ATTR_CTIME_SET)
 684                 out |= LA_CTIME;
 685
 686         if (in & ATTR_MTIME_SET)
 687                 out |= LA_MTIME;
 688
 689         if (in & ATTR_ATTR_FLAG)
 690                 out |= LA_FLAGS;
 691
 692         if (in & MDS_OPEN_OWNEROVERRIDE)
 693                 out |= MDS_OPEN_OWNEROVERRIDE;
 694
 695         /*XXX need ATTR_RAW?*/
 696         in &= ~(ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_BLOCKS|
 697                 ATTR_ATIME|ATTR_MTIME|ATTR_CTIME|ATTR_FROM_OPEN|
 698                 ATTR_ATIME_SET|ATTR_CTIME_SET|ATTR_MTIME_SET|
 699                 ATTR_ATTR_FLAG|ATTR_RAW|MDS_OPEN_OWNEROVERRIDE);
 700         if (in != 0)
 701                 CERROR("Unknown attr bits: %#llx\n", in);
 702         return out;
 703 }
 704 /* unpacking */
 705
 706 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
 707 {
 708         struct md_ucred         *uc  = mdt_ucred(info);
 709         struct md_attr          *ma = &info->mti_attr;
 710         struct lu_attr          *la = &ma->ma_attr;
 711         struct req_capsule      *pill = &info->mti_pill;
 712         struct mdt_reint_record *rr = &info->mti_rr;
 713         struct mdt_rec_setattr  *rec;
 714         ENTRY;
 715
 716         rec = req_capsule_client_get(pill, &RMF_REC_SETATTR);
 717         if (rec == NULL)
 718                 RETURN(-EFAULT);
 719
 720         uc->mu_fsuid = rec->sa_fsuid;
 721         uc->mu_fsgid = rec->sa_fsgid;
 722         uc->mu_cap   = rec->sa_cap;
 723         uc->mu_suppgids[0] = rec->sa_suppgid;
 724         uc->mu_suppgids[1] = -1;
 725
 726         rr->rr_fid1 = &rec->sa_fid;
 727         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
 728         la->la_mode  = rec->sa_mode;
 729         la->la_flags = rec->sa_attr_flags;
 730         la->la_uid   = rec->sa_uid;
 731         la->la_gid   = rec->sa_gid;
 732         la->la_size  = rec->sa_size;
 733         la->la_blocks = rec->sa_blocks;
 734         la->la_ctime = rec->sa_ctime;
 735         la->la_atime = rec->sa_atime;
 736         la->la_mtime = rec->sa_mtime;
 737         ma->ma_valid = MA_INODE;
 738
 739         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 740                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 741                                  req_capsule_client_get(pill, &RMF_CAPA1));
 742
 743         RETURN(0);
 744 }
 745
 746 static int mdt_epoch_unpack(struct mdt_thread_info *info)
 747 {
 748         struct req_capsule *pill = &info->mti_pill;
 749         ENTRY;
 750
 751         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
 752                 info->mti_epoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
 753         else
 754                 info->mti_epoch = NULL;
 755         RETURN(info->mti_epoch == NULL ? -EFAULT : 0);
 756 }
 757
 758 static int mdt_setattr_unpack(struct mdt_thread_info *info)
 759 {
 760         struct md_attr          *ma = &info->mti_attr;
 761         struct req_capsule      *pill = &info->mti_pill;
 762         int rc;
 763         ENTRY;
 764
 765         rc = mdt_setattr_unpack_rec(info);
 766         if (rc)
 767                 RETURN(rc);
 768
 769         /* Epoch may be absent */
 770         mdt_epoch_unpack(info);
 771
 772         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
 773                 ma->ma_lmm = req_capsule_client_get(pill, &RMF_EADATA);
 774                 ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_EADATA,
 775                                                        RCL_CLIENT);
 776                 ma->ma_valid |= MA_LOV;
 777         }
 778
 779         if (req_capsule_field_present(pill, &RMF_LOGCOOKIES, RCL_CLIENT)) {
 780                 ma->ma_cookie = req_capsule_client_get(pill,
 781                                                        &RMF_LOGCOOKIES);
 782                 ma->ma_cookie_size = req_capsule_get_size(pill,
 783                                                           &RMF_LOGCOOKIES,
 784                                                           RCL_CLIENT);
 785                 ma->ma_valid |= MA_COOKIE;
 786         }
 787
 788         RETURN(0);
 789 }
 790
 791 int mdt_close_unpack(struct mdt_thread_info *info)
 792 {
 793         int rc;
 794         ENTRY;
 795
 796         rc = mdt_epoch_unpack(info);
 797         if (rc)
 798                 RETURN(rc);
 799
 800         RETURN(mdt_setattr_unpack_rec(info));
 801 }
 802
 803 static int mdt_create_unpack(struct mdt_thread_info *info)
 804 {
 805         struct md_ucred         *uc  = mdt_ucred(info);
 806         struct mdt_rec_create   *rec;
 807         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 808         struct mdt_reint_record *rr = &info->mti_rr;
 809         struct req_capsule      *pill = &info->mti_pill;
 810         struct md_op_spec       *sp = &info->mti_spec;
 811         ENTRY;
 812
 813         rec = req_capsule_client_get(pill, &RMF_REC_CREATE);
 814         if (rec == NULL)
 815                 RETURN(-EFAULT);
 816
 817         uc->mu_fsuid = rec->cr_fsuid;
 818         uc->mu_fsgid = rec->cr_fsgid;
 819         uc->mu_cap   = rec->cr_cap;
 820         uc->mu_suppgids[0] = rec->cr_suppgid1;
 821         uc->mu_suppgids[1] = -1;
 822
 823         rr->rr_fid1 = &rec->cr_fid1;
 824         rr->rr_fid2 = &rec->cr_fid2;
 825         attr->la_mode = rec->cr_mode;
 826         attr->la_rdev  = rec->cr_rdev;
 827         attr->la_uid   = rec->cr_fsuid;
 828         attr->la_gid   = rec->cr_fsgid;
 829         attr->la_ctime = rec->cr_time;
 830         attr->la_mtime = rec->cr_time;
 831         attr->la_atime = rec->cr_time;
 832         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID |
 833                          LA_CTIME | LA_MTIME | LA_ATIME;
 834         memset(&sp->u, 0, sizeof(sp->u));
 835         sp->sp_cr_flags = rec->cr_flags;
 836         sp->sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
 837         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
 838
 839         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 840                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 841                                  req_capsule_client_get(pill, &RMF_CAPA1));
 842         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
 843
 844         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 845         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
 846         LASSERT(rr->rr_namelen > 0);
 847
 848 #ifdef CONFIG_FS_POSIX_ACL
 849         if (sp->sp_cr_flags & MDS_CREATE_RMT_ACL) {
 850                 if (S_ISDIR(attr->la_mode))
 851                         sp->u.sp_pfid = rr->rr_fid1;
 852                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_RMT_ACL);
 853                 LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
 854                                                   RCL_CLIENT));
 855                 sp->u.sp_ea.eadata = req_capsule_client_get(pill, &RMF_EADATA);
 856                 sp->u.sp_ea.eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
 857                                                                 RCL_CLIENT);
 858                 sp->u.sp_ea.fid = rr->rr_fid1;
 859                 RETURN(0);
 860         }
 861 #endif
 862         if (S_ISDIR(attr->la_mode)) {
 863                 /* pass parent fid for cross-ref cases */
 864                 sp->u.sp_pfid = rr->rr_fid1;
 865                 if (sp->sp_cr_flags & MDS_CREATE_SLAVE_OBJ) {
 866                         /* create salve object req, need
 867                          * unpack split ea here
 868                          */
 869                        req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SLAVE);
 870                        LASSERT(req_capsule_field_present(pill, &RMF_EADATA,
 871                                                          RCL_CLIENT));
 872                        sp->u.sp_ea.eadata = req_capsule_client_get(pill,
 873                                                                    &RMF_EADATA);
 874                        sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
 875                                                                     &RMF_EADATA,
 876                                                                     RCL_CLIENT);
 877                        sp->u.sp_ea.fid = rr->rr_fid1;
 878                 }
 879         } else if (S_ISLNK(attr->la_mode)) {
 880                 const char *tgt = NULL;
 881
 882                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
 883                 if (req_capsule_field_present(pill, &RMF_SYMTGT, RCL_CLIENT)) {
 884                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
 885                         sp->u.sp_symname = tgt;
 886                 }
 887                 if (tgt == NULL)
 888                         RETURN(-EFAULT);
 889         }
 890         RETURN(0);
 891 }
 892
 893 static int mdt_link_unpack(struct mdt_thread_info *info)
 894 {
 895         struct md_ucred         *uc  = mdt_ucred(info);
 896         struct mdt_rec_link     *rec;
 897         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 898         struct mdt_reint_record *rr = &info->mti_rr;
 899         struct req_capsule      *pill = &info->mti_pill;
 900         ENTRY;
 901
 902         rec = req_capsule_client_get(pill, &RMF_REC_LINK);
 903         if (rec == NULL)
 904                 RETURN(-EFAULT);
 905
 906         uc->mu_fsuid = rec->lk_fsuid;
 907         uc->mu_fsgid = rec->lk_fsgid;
 908         uc->mu_cap   = rec->lk_cap;
 909         uc->mu_suppgids[0] = rec->lk_suppgid1;
 910         uc->mu_suppgids[1] = rec->lk_suppgid2;
 911
 912         attr->la_uid = rec->lk_fsuid;
 913         attr->la_gid = rec->lk_fsgid;
 914         rr->rr_fid1 = &rec->lk_fid1;
 915         rr->rr_fid2 = &rec->lk_fid2;
 916         attr->la_ctime = rec->lk_time;
 917         attr->la_mtime = rec->lk_time;
 918         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
 919
 920         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 921                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 922                                  req_capsule_client_get(pill, &RMF_CAPA1));
 923         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
 924                 mdt_set_capainfo(info, 1, rr->rr_fid2,
 925                                  req_capsule_client_get(pill, &RMF_CAPA2));
 926
 927         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 928         if (rr->rr_name == NULL)
 929                 RETURN(-EFAULT);
 930         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
 931         LASSERT(rr->rr_namelen > 0);
 932         info->mti_spec.sp_ck_split = !!(rec->lk_bias & MDS_CHECK_SPLIT);
 933         info->mti_cross_ref = !!(rec->lk_bias & MDS_CROSS_REF);
 934
 935         RETURN(0);
 936 }
 937
 938 static int mdt_unlink_unpack(struct mdt_thread_info *info)
 939 {
 940         struct md_ucred         *uc  = mdt_ucred(info);
 941         struct mdt_rec_unlink   *rec;
 942         struct md_attr          *ma = &info->mti_attr;
 943         struct lu_attr          *attr = &info->mti_attr.ma_attr;
 944         struct mdt_reint_record *rr = &info->mti_rr;
 945         struct req_capsule      *pill = &info->mti_pill;
 946         ENTRY;
 947
 948         rec = req_capsule_client_get(pill, &RMF_REC_UNLINK);
 949         if (rec == NULL)
 950                 RETURN(-EFAULT);
 951
 952         uc->mu_fsuid = rec->ul_fsuid;
 953         uc->mu_fsgid = rec->ul_fsgid;
 954         uc->mu_cap   = rec->ul_cap;
 955         uc->mu_suppgids[0] = rec->ul_suppgid;
 956         uc->mu_suppgids[1] = -1;
 957
 958         attr->la_uid = rec->ul_fsuid;
 959         attr->la_gid = rec->ul_fsgid;
 960         rr->rr_fid1 = &rec->ul_fid1;
 961         rr->rr_fid2 = &rec->ul_fid2;
 962         attr->la_ctime = rec->ul_time;
 963         attr->la_mtime = rec->ul_time;
 964         attr->la_mode  = rec->ul_mode;
 965         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
 966
 967         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
 968                 mdt_set_capainfo(info, 0, rr->rr_fid1,
 969                                  req_capsule_client_get(pill, &RMF_CAPA1));
 970
 971         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
 972         if (rr->rr_name == NULL)
 973                 RETURN(-EFAULT);
 974         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
 975         LASSERT(rr->rr_namelen > 0);
 976         info->mti_spec.sp_ck_split = !!(rec->ul_bias & MDS_CHECK_SPLIT);
 977         info->mti_cross_ref = !!(rec->ul_bias & MDS_CROSS_REF);
 978         if (rec->ul_bias & MDS_VTX_BYPASS)
 979                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
 980         else
 981                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
 982
 983         RETURN(0);
 984 }
 985
 986 static int mdt_rename_unpack(struct mdt_thread_info *info)
 987 {
 988         struct md_ucred         *uc = mdt_ucred(info);
 989         struct mdt_rec_rename   *rec;
 990         struct md_attr          *ma = &info->mti_attr;
 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         ENTRY;
 995
 996         rec = req_capsule_client_get(pill, &RMF_REC_RENAME);
 997         if (rec == NULL)
 998                 RETURN(-EFAULT);
 999
1000         uc->mu_fsuid = rec->rn_fsuid;
1001         uc->mu_fsgid = rec->rn_fsgid;
1002         uc->mu_cap   = rec->rn_cap;
1003         uc->mu_suppgids[0] = rec->rn_suppgid1;
1004         uc->mu_suppgids[1] = rec->rn_suppgid2;
1005
1006         attr->la_uid = rec->rn_fsuid;
1007         attr->la_gid = rec->rn_fsgid;
1008         rr->rr_fid1 = &rec->rn_fid1;
1009         rr->rr_fid2 = &rec->rn_fid2;
1010         attr->la_ctime = rec->rn_time;
1011         attr->la_mtime = rec->rn_time;
1012         /* rename_tgt contains the mode already */
1013         attr->la_mode = rec->rn_mode;
1014         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1015
1016         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1017                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1018                                  req_capsule_client_get(pill, &RMF_CAPA1));
1019         if (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))
1020                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1021                                  req_capsule_client_get(pill, &RMF_CAPA2));
1022
1023         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1024         rr->rr_tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1025         if (rr->rr_name == NULL || rr->rr_tgt == NULL)
1026                 RETURN(-EFAULT);
1027         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1028         LASSERT(rr->rr_namelen > 0);
1029         rr->rr_tgtlen = req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT) - 1;
1030         LASSERT(rr->rr_tgtlen > 0);
1031         info->mti_spec.sp_ck_split = !!(rec->rn_bias & MDS_CHECK_SPLIT);
1032         info->mti_cross_ref = !!(rec->rn_bias & MDS_CROSS_REF);
1033         if (rec->rn_bias & MDS_VTX_BYPASS)
1034                 ma->ma_attr_flags |= MDS_VTX_BYPASS;
1035         else
1036                 ma->ma_attr_flags &= ~MDS_VTX_BYPASS;
1037
1038         RETURN(0);
1039 }
1040
1041 static int mdt_open_unpack(struct mdt_thread_info *info)
1042 {
1043         struct md_ucred         *uc = mdt_ucred(info);
1044         struct mdt_rec_create   *rec;
1045         struct lu_attr          *attr = &info->mti_attr.ma_attr;
1046         struct req_capsule      *pill = &info->mti_pill;
1047         struct mdt_reint_record *rr   = &info->mti_rr;
1048         struct ptlrpc_request   *req  = mdt_info_req(info);
1049         ENTRY;
1050
1051         rec = req_capsule_client_get(pill, &RMF_REC_CREATE);
1052         if (rec == NULL)
1053                 RETURN(-EFAULT);
1054
1055         uc->mu_fsuid = rec->cr_fsuid;
1056         uc->mu_fsgid = rec->cr_fsgid;
1057         uc->mu_cap   = rec->cr_cap;
1058         uc->mu_suppgids[0] = rec->cr_suppgid1;
1059         uc->mu_suppgids[1] = rec->cr_suppgid2;
1060
1061         rr->rr_fid1   = &rec->cr_fid1;
1062         rr->rr_fid2   = &rec->cr_fid2;
1063         rr->rr_handle = &rec->cr_old_handle;
1064         attr->la_mode = rec->cr_mode;
1065         attr->la_rdev  = rec->cr_rdev;
1066         attr->la_uid   = rec->cr_fsuid;
1067         attr->la_gid   = rec->cr_fsgid;
1068         attr->la_ctime = rec->cr_time;
1069         attr->la_mtime = rec->cr_time;
1070         attr->la_atime = rec->cr_time;
1071         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1072                          LA_CTIME | LA_MTIME | LA_ATIME;
1073         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1074         info->mti_spec.sp_cr_flags = rec->cr_flags;
1075         info->mti_replayepoch = rec->cr_ioepoch;
1076
1077         info->mti_spec.sp_ck_split = !!(rec->cr_bias & MDS_CHECK_SPLIT);
1078         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1079
1080         if (req_capsule_get_size(pill, &RMF_CAPA1, RCL_CLIENT))
1081                 mdt_set_capainfo(info, 0, rr->rr_fid1,
1082                                  req_capsule_client_get(pill, &RMF_CAPA1));
1083         if ((lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
1084             (req_capsule_get_size(pill, &RMF_CAPA2, RCL_CLIENT))) {
1085 #if 0
1086                 mdt_set_capainfo(info, 1, rr->rr_fid2,
1087                                  req_capsule_client_get(pill, &RMF_CAPA2));
1088 #else
1089                 /*
1090                  * FIXME: capa in replay open request might have expired,
1091                  * bypass capa check. Security hole?
1092                  */
1093                 mdt_set_capainfo(info, 0, rr->rr_fid1, BYPASS_CAPA);
1094                 mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1095 #endif
1096         }
1097
1098         rr->rr_name = req_capsule_client_get(pill, &RMF_NAME);
1099         if (rr->rr_name == NULL)
1100                 RETURN(-EFAULT);
1101         rr->rr_namelen = req_capsule_get_size(pill, &RMF_NAME, RCL_CLIENT) - 1;
1102         LASSERT(rr->rr_namelen > 0);
1103
1104         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1105                 struct md_op_spec *sp = &info->mti_spec;
1106                 sp->u.sp_ea.eadata = req_capsule_client_get(pill,
1107                                                             &RMF_EADATA);
1108                 sp->u.sp_ea.eadatalen = req_capsule_get_size(pill,
1109                                                              &RMF_EADATA,
1110                                                              RCL_CLIENT);
1111                 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1112                         sp->u.sp_ea.no_lov_create = 1;
1113         }
1114
1115         RETURN(0);
1116 }
1117
1118 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1119
1120 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1121         [REINT_SETATTR]  = mdt_setattr_unpack,
1122         [REINT_CREATE]   = mdt_create_unpack,
1123         [REINT_LINK]     = mdt_link_unpack,
1124         [REINT_UNLINK]   = mdt_unlink_unpack,
1125         [REINT_RENAME]   = mdt_rename_unpack,
1126         [REINT_OPEN]     = mdt_open_unpack
1127 };
1128
1129 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1130 {
1131         int rc;
1132         ENTRY;
1133
1134         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1135         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1136                 info->mti_rr.rr_opcode = op;
1137                 rc = mdt_reint_unpackers[op](info);
1138         } else {
1139                 CERROR("Unexpected opcode %d\n", op);
1140                 rc = -EFAULT;
1141         }
1142         RETURN(rc);
1143 }