lustre/mdt/mdt_lib.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/mdt/mdt_lib.c
  33  *
  34  * Lustre Metadata Target (mdt) request unpacking helper.
  35  *
  36  * Author: Peter Braam <braam@clusterfs.com>
  37  * Author: Andreas Dilger <adilger@clusterfs.com>
  38  * Author: Phil Schwan <phil@clusterfs.com>
  39  * Author: Mike Shaver <shaver@clusterfs.com>
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  * Author: Huang Hua <huanghua@clusterfs.com>
  42  * Author: Fan Yong <fanyong@clusterfs.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_MDS
  46
  47 #include <linux/user_namespace.h>
  48 #include <linux/uidgid.h>
  49
  50 #include "mdt_internal.h"
  51 #include <uapi/linux/lnet/nidstr.h>
  52 #include <lustre_nodemap.h>
  53
  54 typedef enum ucred_init_type {
  55         NONE_INIT       = 0,
  56         BODY_INIT       = 1,
  57         REC_INIT        = 2
  58 } ucred_init_type_t;
  59
  60 static __u64 get_mrc_cr_flags(struct mdt_rec_create *mrc)
  61 {
  62         return (__u64)(mrc->cr_flags_l) | ((__u64)mrc->cr_flags_h << 32);
  63 }
  64
  65 void mdt_exit_ucred(struct mdt_thread_info *info)
  66 {
  67         struct lu_ucred   *uc  = mdt_ucred(info);
  68         struct mdt_device *mdt = info->mti_mdt;
  69
  70         LASSERT(uc != NULL);
  71         if (uc->uc_valid != UCRED_INIT) {
  72                 uc->uc_suppgids[0] = uc->uc_suppgids[1] = -1;
  73                 if (uc->uc_ginfo) {
  74                         put_group_info(uc->uc_ginfo);
  75                         uc->uc_ginfo = NULL;
  76                 }
  77                 if (uc->uc_identity) {
  78                         mdt_identity_put(mdt->mdt_identity_cache,
  79                                          uc->uc_identity);
  80                         uc->uc_identity = NULL;
  81                 }
  82                 uc->uc_valid = UCRED_INIT;
  83         }
  84 }
  85
  86 static int match_nosquash_list(struct spinlock *rsi_lock,
  87                                struct list_head *nidlist,
  88                                lnet_nid_t peernid)
  89 {
  90         int rc;
  91         ENTRY;
  92         spin_lock(rsi_lock);
  93         rc = cfs_match_nid(peernid, nidlist);
  94         spin_unlock(rsi_lock);
  95         RETURN(rc);
  96 }
  97
  98 /* root_squash for inter-MDS operations */
  99 static int mdt_root_squash(struct mdt_thread_info *info, lnet_nid_t peernid)
 100 {
 101         struct lu_ucred *ucred = mdt_ucred(info);
 102         struct root_squash_info *squash = &info->mti_mdt->mdt_squash;
 103         ENTRY;
 104
 105         LASSERT(ucred != NULL);
 106         if (!squash->rsi_uid || ucred->uc_fsuid)
 107                 RETURN(0);
 108
 109         if (match_nosquash_list(&squash->rsi_lock,
 110                                 &squash->rsi_nosquash_nids,
 111                                 peernid)) {
 112                 CDEBUG(D_OTHER, "%s is in nosquash_nids list\n",
 113                        libcfs_nid2str(peernid));
 114                 RETURN(0);
 115         }
 116
 117         CDEBUG(D_OTHER, "squash req from %s, (%d:%d/%x)=>(%d:%d/%x)\n",
 118                libcfs_nid2str(peernid),
 119                ucred->uc_fsuid, ucred->uc_fsgid, ucred->uc_cap,
 120                squash->rsi_uid, squash->rsi_gid, 0);
 121
 122         ucred->uc_fsuid = squash->rsi_uid;
 123         ucred->uc_fsgid = squash->rsi_gid;
 124         ucred->uc_cap = 0;
 125         ucred->uc_suppgids[0] = -1;
 126         ucred->uc_suppgids[1] = -1;
 127
 128         RETURN(0);
 129 }
 130
 131 static void ucred_set_jobid(struct mdt_thread_info *info, struct lu_ucred *uc)
 132 {
 133         struct ptlrpc_request   *req = mdt_info_req(info);
 134         const char              *jobid = mdt_req_get_jobid(req);
 135
 136         /* set jobid if specified. */
 137         if (jobid)
 138                 strlcpy(uc->uc_jobid, jobid, sizeof(uc->uc_jobid));
 139         else
 140                 uc->uc_jobid[0] = '\0';
 141 }
 142
 143 static void ucred_set_nid(struct mdt_thread_info *info, struct lu_ucred *uc)
 144 {
 145         if (info && info->mti_exp && info->mti_exp->exp_connection)
 146                 uc->uc_nid = info->mti_exp->exp_connection->c_peer.nid;
 147         else
 148                 uc->uc_nid = LNET_NID_ANY;
 149 }
 150
 151 static void ucred_set_audit_enabled(struct mdt_thread_info *info,
 152                                     struct lu_ucred *uc)
 153 {
 154         struct lu_nodemap *nodemap = NULL;
 155         bool audit = true;
 156
 157         if (info && info->mti_exp) {
 158                 nodemap = nodemap_get_from_exp(info->mti_exp);
 159                 if (nodemap && !IS_ERR(nodemap)) {
 160                         audit = nodemap->nmf_enable_audit;
 161                         nodemap_putref(nodemap);
 162                 }
 163         }
 164
 165         uc->uc_enable_audit = audit;
 166 }
 167
 168 static int new_init_ucred(struct mdt_thread_info *info, ucred_init_type_t type,
 169                           void *buf)
 170 {
 171         struct ptlrpc_request *req = mdt_info_req(info);
 172         struct mdt_device *mdt = info->mti_mdt;
 173         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 174         struct lu_ucred *ucred = mdt_ucred(info);
 175         struct lu_nodemap *nodemap;
 176         lnet_nid_t peernid = req->rq_peer.nid;
 177         __u32 perm = 0;
 178         int setuid;
 179         int setgid;
 180         bool is_nm_gid_squashed = false;
 181         int rc = 0;
 182
 183         ENTRY;
 184
 185         LASSERT(req->rq_auth_gss);
 186         LASSERT(!req->rq_auth_usr_mdt);
 187         LASSERT(req->rq_user_desc);
 188         LASSERT(ucred != NULL);
 189
 190         ucred->uc_valid = UCRED_INVALID;
 191
 192         nodemap = nodemap_get_from_exp(info->mti_exp);
 193         if (IS_ERR(nodemap))
 194                 RETURN(PTR_ERR(nodemap));
 195
 196         pud->pud_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 197                                        NODEMAP_CLIENT_TO_FS, pud->pud_uid);
 198         pud->pud_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 199                                        NODEMAP_CLIENT_TO_FS, pud->pud_gid);
 200         pud->pud_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 201                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsuid);
 202         pud->pud_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 203                                        NODEMAP_CLIENT_TO_FS, pud->pud_fsgid);
 204
 205         ucred->uc_o_uid = pud->pud_uid;
 206         ucred->uc_o_gid = pud->pud_gid;
 207         ucred->uc_o_fsuid = pud->pud_fsuid;
 208         ucred->uc_o_fsgid = pud->pud_fsgid;
 209
 210         if (nodemap && ucred->uc_o_uid == nodemap->nm_squash_uid) {
 211                 /* deny access before we get identity ref */
 212                 if (nodemap->nmf_deny_unknown) {
 213                         nodemap_putref(nodemap);
 214                         RETURN(-EACCES);
 215                 }
 216
 217                 ucred->uc_suppgids[0] = -1;
 218                 ucred->uc_suppgids[1] = -1;
 219         }
 220
 221         if (nodemap && ucred->uc_o_gid == nodemap->nm_squash_gid)
 222                 is_nm_gid_squashed = true;
 223
 224         nodemap_putref(nodemap);
 225
 226         if (type == BODY_INIT) {
 227                 struct mdt_body *body = (struct mdt_body *)buf;
 228
 229                 ucred->uc_suppgids[0] = body->mbo_suppgid;
 230                 ucred->uc_suppgids[1] = -1;
 231         }
 232
 233         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 234             req->rq_auth_uid != pud->pud_uid) {
 235                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 236                        "while client claims %u:%u/%u:%u\n",
 237                        libcfs_nid2str(peernid), req->rq_auth_uid,
 238                        pud->pud_uid, pud->pud_gid,
 239                        pud->pud_fsuid, pud->pud_fsgid);
 240                 RETURN(-EACCES);
 241         }
 242
 243         if (is_identity_get_disabled(mdt->mdt_identity_cache)) {
 244                 ucred->uc_identity = NULL;
 245                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM | CFS_SETGRP_PERM;
 246         } else {
 247                 struct md_identity *identity;
 248
 249                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 250                                             pud->pud_uid);
 251                 if (IS_ERR(identity)) {
 252                         if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 253                                 ucred->uc_identity = NULL;
 254                                 perm = CFS_SETUID_PERM | CFS_SETGID_PERM |
 255                                        CFS_SETGRP_PERM;
 256                         } else {
 257                                 CDEBUG(D_SEC,
 258                                        "Deny access without identity: uid %u\n",
 259                                        pud->pud_uid);
 260                                 RETURN(-EACCES);
 261                         }
 262                 } else {
 263                         ucred->uc_identity = identity;
 264                         perm = mdt_identity_get_perm(ucred->uc_identity,
 265                                                      peernid);
 266                 }
 267         }
 268
 269         /* find out the setuid/setgid attempt */
 270         setuid = (pud->pud_uid != pud->pud_fsuid);
 271         setgid = ((pud->pud_gid != pud->pud_fsgid) ||
 272                   (ucred->uc_identity &&
 273                    (pud->pud_gid != ucred->uc_identity->mi_gid)));
 274
 275         /* check permission of setuid */
 276         if (setuid && !(perm & CFS_SETUID_PERM)) {
 277                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 278                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 279                 GOTO(out, rc = -EACCES);
 280         }
 281
 282         /* check permission of setgid */
 283         if (setgid && !(perm & CFS_SETGID_PERM)) {
 284                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 285                        "from %s\n", pud->pud_uid, pud->pud_gid,
 286                        pud->pud_fsuid, pud->pud_fsgid,
 287                        ucred->uc_identity->mi_gid, libcfs_nid2str(peernid));
 288                 GOTO(out, rc = -EACCES);
 289         }
 290
 291         if (perm & CFS_SETGRP_PERM) {
 292                 /* only set groups if GID is not squashed */
 293                 if (pud->pud_ngroups && !is_nm_gid_squashed) {
 294                         /* setgroups for local client */
 295                         ucred->uc_ginfo = groups_alloc(pud->pud_ngroups);
 296                         if (!ucred->uc_ginfo) {
 297                                 CERROR("failed to alloc %d groups\n",
 298                                        pud->pud_ngroups);
 299                                 GOTO(out, rc = -ENOMEM);
 300                         }
 301
 302                         lustre_groups_from_list(ucred->uc_ginfo,
 303                                                 pud->pud_groups);
 304                         lustre_groups_sort(ucred->uc_ginfo);
 305                 } else {
 306                         ucred->uc_suppgids[0] = -1;
 307                         ucred->uc_suppgids[1] = -1;
 308                         ucred->uc_ginfo = NULL;
 309                 }
 310         } else {
 311                 ucred->uc_suppgids[0] = -1;
 312                 ucred->uc_suppgids[1] = -1;
 313                 ucred->uc_ginfo = NULL;
 314         }
 315
 316         ucred->uc_uid = pud->pud_uid;
 317         ucred->uc_gid = pud->pud_gid;
 318
 319         if (nodemap && ucred->uc_o_uid == nodemap->nm_squash_uid) {
 320                 ucred->uc_cap = 0;
 321         } else {
 322                 ucred->uc_cap = pud->pud_cap;
 323         }
 324         ucred->uc_fsuid = pud->pud_fsuid;
 325         ucred->uc_fsgid = pud->pud_fsgid;
 326
 327         /* process root_squash here. */
 328         mdt_root_squash(info, peernid);
 329
 330         ucred->uc_valid = UCRED_NEW;
 331         ucred_set_jobid(info, ucred);
 332         ucred_set_nid(info, ucred);
 333         ucred_set_audit_enabled(info, ucred);
 334
 335         EXIT;
 336
 337 out:
 338         if (rc) {
 339                 if (ucred->uc_ginfo) {
 340                         put_group_info(ucred->uc_ginfo);
 341                         ucred->uc_ginfo = NULL;
 342                 }
 343                 if (ucred->uc_identity) {
 344                         mdt_identity_put(mdt->mdt_identity_cache,
 345                                          ucred->uc_identity);
 346                         ucred->uc_identity = NULL;
 347                 }
 348         }
 349
 350         return rc;
 351 }
 352
 353 /**
 354  * Check whether allow the client to set supplementary group IDs or not.
 355  *
 356  * \param[in] info      pointer to the thread context
 357  * \param[in] uc        pointer to the RPC user descriptor
 358  *
 359  * \retval              true if allow to set supplementary group IDs
 360  * \retval              false for other cases
 361  */
 362 bool allow_client_chgrp(struct mdt_thread_info *info, struct lu_ucred *uc)
 363 {
 364         __u32 perm;
 365
 366         /* 1. If identity_upcall is disabled,
 367          *    permit local client to do anything. */
 368         if (is_identity_get_disabled(info->mti_mdt->mdt_identity_cache))
 369                 return true;
 370
 371         /* 2. If fail to get related identities, then forbid any client to
 372          *    set supplementary group IDs. */
 373         if (uc->uc_identity == NULL)
 374                 return false;
 375
 376         /* 3. Check the permission in the identities. */
 377         perm = mdt_identity_get_perm(uc->uc_identity,
 378                                      mdt_info_req(info)->rq_peer.nid);
 379         if (perm & CFS_SETGRP_PERM)
 380                 return true;
 381
 382         return false;
 383 }
 384
 385 int mdt_check_ucred(struct mdt_thread_info *info)
 386 {
 387         struct ptlrpc_request   *req = mdt_info_req(info);
 388         struct mdt_device       *mdt = info->mti_mdt;
 389         struct ptlrpc_user_desc *pud = req->rq_user_desc;
 390         struct lu_ucred         *ucred = mdt_ucred(info);
 391         struct md_identity      *identity = NULL;
 392         lnet_nid_t               peernid = req->rq_peer.nid;
 393         __u32                    perm = 0;
 394         int                      setuid;
 395         int                      setgid;
 396         int                      rc = 0;
 397
 398         ENTRY;
 399
 400         LASSERT(ucred != NULL);
 401         if ((ucred->uc_valid == UCRED_OLD) || (ucred->uc_valid == UCRED_NEW))
 402                 RETURN(0);
 403
 404         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 405                 RETURN(0);
 406
 407         /* sanity check: if we use strong authentication, we expect the
 408          * uid which client claimed is true */
 409         if (!flvr_is_rootonly(req->rq_flvr.sf_rpc) &&
 410             req->rq_auth_uid != pud->pud_uid) {
 411                 CDEBUG(D_SEC, "local client %s: auth uid %u "
 412                        "while client claims %u:%u/%u:%u\n",
 413                        libcfs_nid2str(peernid), req->rq_auth_uid,
 414                        pud->pud_uid, pud->pud_gid,
 415                        pud->pud_fsuid, pud->pud_fsgid);
 416                 RETURN(-EACCES);
 417         }
 418
 419         if (is_identity_get_disabled(mdt->mdt_identity_cache))
 420                 RETURN(0);
 421
 422         identity = mdt_identity_get(mdt->mdt_identity_cache, pud->pud_uid);
 423         if (IS_ERR(identity)) {
 424                 if (unlikely(PTR_ERR(identity) == -EREMCHG)) {
 425                         RETURN(0);
 426                 } else {
 427                         CDEBUG(D_SEC, "Deny access without identity: uid %u\n",
 428                                pud->pud_uid);
 429                         RETURN(-EACCES);
 430                 }
 431         }
 432
 433         perm = mdt_identity_get_perm(identity, peernid);
 434         /* find out the setuid/setgid attempt */
 435         setuid = (pud->pud_uid != pud->pud_fsuid);
 436         setgid = (pud->pud_gid != pud->pud_fsgid ||
 437                   pud->pud_gid != identity->mi_gid);
 438
 439         /* check permission of setuid */
 440         if (setuid && !(perm & CFS_SETUID_PERM)) {
 441                 CDEBUG(D_SEC, "mdt blocked setuid attempt (%u -> %u) from %s\n",
 442                        pud->pud_uid, pud->pud_fsuid, libcfs_nid2str(peernid));
 443                 GOTO(out, rc = -EACCES);
 444         }
 445
 446         /* check permission of setgid */
 447         if (setgid && !(perm & CFS_SETGID_PERM)) {
 448                 CDEBUG(D_SEC, "mdt blocked setgid attempt (%u:%u/%u:%u -> %u) "
 449                        "from %s\n", pud->pud_uid, pud->pud_gid,
 450                        pud->pud_fsuid, pud->pud_fsgid, identity->mi_gid,
 451                        libcfs_nid2str(peernid));
 452                 GOTO(out, rc = -EACCES);
 453         }
 454
 455         EXIT;
 456
 457 out:
 458         mdt_identity_put(mdt->mdt_identity_cache, identity);
 459         return rc;
 460 }
 461
 462 static int old_init_ucred_common(struct mdt_thread_info *info,
 463                                  struct lu_nodemap *nodemap)
 464 {
 465         struct lu_ucred         *uc = mdt_ucred(info);
 466         struct mdt_device       *mdt = info->mti_mdt;
 467         struct md_identity      *identity = NULL;
 468
 469         if (nodemap && uc->uc_o_uid == nodemap->nm_squash_uid) {
 470                 /* deny access before we get identity ref */
 471                 if (nodemap->nmf_deny_unknown)
 472                         RETURN(-EACCES);
 473
 474                 uc->uc_cap = 0;
 475                 uc->uc_suppgids[0] = -1;
 476                 uc->uc_suppgids[1] = -1;
 477         }
 478
 479         if (!is_identity_get_disabled(mdt->mdt_identity_cache)) {
 480                 identity = mdt_identity_get(mdt->mdt_identity_cache,
 481                                             uc->uc_fsuid);
 482                 if (IS_ERR(identity)) {
 483                         if (unlikely(PTR_ERR(identity) == -EREMCHG ||
 484                                      uc->uc_cap & CFS_CAP_FS_MASK)) {
 485                                 identity = NULL;
 486                         } else {
 487                                 CDEBUG(D_SEC, "Deny access without identity: "
 488                                        "uid %u\n", uc->uc_fsuid);
 489                                 RETURN(-EACCES);
 490                         }
 491                 }
 492         }
 493         uc->uc_identity = identity;
 494
 495         /* process root_squash here. */
 496         mdt_root_squash(info, mdt_info_req(info)->rq_peer.nid);
 497
 498         uc->uc_valid = UCRED_OLD;
 499         ucred_set_jobid(info, uc);
 500         ucred_set_nid(info, uc);
 501         ucred_set_audit_enabled(info, uc);
 502
 503         EXIT;
 504
 505         return 0;
 506 }
 507
 508 static int old_init_ucred(struct mdt_thread_info *info,
 509                           struct mdt_body *body)
 510 {
 511         struct lu_ucred *uc = mdt_ucred(info);
 512         struct lu_nodemap *nodemap;
 513         int rc;
 514         ENTRY;
 515
 516         nodemap = nodemap_get_from_exp(info->mti_exp);
 517         if (IS_ERR(nodemap))
 518                 RETURN(PTR_ERR(nodemap));
 519
 520         body->mbo_uid = nodemap_map_id(nodemap, NODEMAP_UID,
 521                                        NODEMAP_CLIENT_TO_FS, body->mbo_uid);
 522         body->mbo_gid = nodemap_map_id(nodemap, NODEMAP_GID,
 523                                        NODEMAP_CLIENT_TO_FS, body->mbo_gid);
 524         body->mbo_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 525                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsuid);
 526         body->mbo_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 527                                        NODEMAP_CLIENT_TO_FS, body->mbo_fsgid);
 528
 529         LASSERT(uc != NULL);
 530         uc->uc_valid = UCRED_INVALID;
 531         uc->uc_o_uid = uc->uc_uid = body->mbo_uid;
 532         uc->uc_o_gid = uc->uc_gid = body->mbo_gid;
 533         uc->uc_o_fsuid = uc->uc_fsuid = body->mbo_fsuid;
 534         uc->uc_o_fsgid = uc->uc_fsgid = body->mbo_fsgid;
 535         uc->uc_suppgids[0] = body->mbo_suppgid;
 536         uc->uc_suppgids[1] = -1;
 537         uc->uc_ginfo = NULL;
 538         uc->uc_cap = body->mbo_capability;
 539
 540         rc = old_init_ucred_common(info, nodemap);
 541         nodemap_putref(nodemap);
 542
 543         RETURN(rc);
 544 }
 545
 546 static int old_init_ucred_reint(struct mdt_thread_info *info)
 547 {
 548         struct lu_ucred *uc = mdt_ucred(info);
 549         struct lu_nodemap *nodemap;
 550         int rc;
 551         ENTRY;
 552
 553         nodemap = nodemap_get_from_exp(info->mti_exp);
 554         if (IS_ERR(nodemap))
 555                 RETURN(PTR_ERR(nodemap));
 556
 557         LASSERT(uc != NULL);
 558
 559         uc->uc_fsuid = nodemap_map_id(nodemap, NODEMAP_UID,
 560                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsuid);
 561         uc->uc_fsgid = nodemap_map_id(nodemap, NODEMAP_GID,
 562                                       NODEMAP_CLIENT_TO_FS, uc->uc_fsgid);
 563
 564         uc->uc_valid = UCRED_INVALID;
 565         uc->uc_o_uid = uc->uc_o_fsuid = uc->uc_uid = uc->uc_fsuid;
 566         uc->uc_o_gid = uc->uc_o_fsgid = uc->uc_gid = uc->uc_fsgid;
 567         uc->uc_ginfo = NULL;
 568
 569         rc = old_init_ucred_common(info, nodemap);
 570         nodemap_putref(nodemap);
 571
 572         RETURN(rc);
 573 }
 574
 575 static inline int __mdt_init_ucred(struct mdt_thread_info *info,
 576                                    struct mdt_body *body)
 577 {
 578         struct ptlrpc_request   *req = mdt_info_req(info);
 579         struct lu_ucred         *uc  = mdt_ucred(info);
 580
 581         LASSERT(uc != NULL);
 582         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 583                 return 0;
 584
 585         mdt_exit_ucred(info);
 586
 587         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 588                 return old_init_ucred(info, body);
 589         else
 590                 return new_init_ucred(info, BODY_INIT, body);
 591 }
 592
 593 int mdt_init_ucred(struct mdt_thread_info *info, struct mdt_body *body)
 594 {
 595         return __mdt_init_ucred(info, body);
 596 }
 597
 598 int mdt_init_ucred_reint(struct mdt_thread_info *info)
 599 {
 600         struct ptlrpc_request *req = mdt_info_req(info);
 601         struct lu_ucred       *uc  = mdt_ucred(info);
 602         struct md_attr        *ma  = &info->mti_attr;
 603
 604         LASSERT(uc != NULL);
 605         if ((uc->uc_valid == UCRED_OLD) || (uc->uc_valid == UCRED_NEW))
 606                 return 0;
 607
 608         /* LU-5564: for normal close request, skip permission check */
 609         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE &&
 610             !(ma->ma_attr_flags & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP)))
 611                 uc->uc_cap |= CFS_CAP_FS_MASK;
 612
 613         mdt_exit_ucred(info);
 614
 615         if (!req->rq_auth_gss || req->rq_auth_usr_mdt || !req->rq_user_desc)
 616                 return old_init_ucred_reint(info);
 617         else
 618                 return new_init_ucred(info, REC_INIT, NULL);
 619 }
 620
 621 /* copied from lov/lov_ea.c, just for debugging, will be removed later */
 622 void mdt_dump_lmm(int level, const struct lov_mds_md *lmm, __u64 valid)
 623 {
 624         const struct lov_ost_data_v1 *lod;
 625         __u32 lmm_magic = le32_to_cpu(lmm->lmm_magic);
 626         __u16 count;
 627         int i;
 628
 629         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 630                 return;
 631
 632         CDEBUG(level, "objid "DOSTID", magic 0x%08X, pattern %#X\n",
 633                POSTID(&lmm->lmm_oi), lmm_magic,
 634                le32_to_cpu(lmm->lmm_pattern));
 635
 636         /* No support for compount layouts yet */
 637         if (lmm_magic != LOV_MAGIC_V1 && lmm_magic != LOV_MAGIC_V3)
 638                 return;
 639
 640         count = le16_to_cpu(((struct lov_user_md *)lmm)->lmm_stripe_count);
 641         CDEBUG(level, "stripe_size=0x%x, stripe_count=0x%x\n",
 642                le32_to_cpu(lmm->lmm_stripe_size), count);
 643
 644         /* If it's a directory or a released file, then there are
 645          * no actual objects to print, so bail out. */
 646         if (valid & OBD_MD_FLDIREA ||
 647             le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED)
 648                 return;
 649
 650         LASSERT(count <= LOV_MAX_STRIPE_COUNT);
 651         for (i = 0, lod = lmm->lmm_objects; i < count; i++, lod++) {
 652                 struct ost_id oi;
 653
 654                 ostid_le_to_cpu(&lod->l_ost_oi, &oi);
 655                 CDEBUG(level, "stripe %u idx %u subobj "DOSTID"\n",
 656                        i, le32_to_cpu(lod->l_ost_idx), POSTID(&oi));
 657         }
 658 }
 659
 660 void mdt_dump_lmv(unsigned int level, const union lmv_mds_md *lmv)
 661 {
 662         const struct lmv_mds_md_v1 *lmm1;
 663         const struct lmv_foreign_md *lfm;
 664         int                        i;
 665
 666         if (likely(!cfs_cdebug_show(level, DEBUG_SUBSYSTEM)))
 667                 return;
 668
 669         /* foreign LMV case */
 670         lfm = &lmv->lmv_foreign_md;
 671         if (le32_to_cpu(lfm->lfm_magic) == LMV_MAGIC_FOREIGN) {
 672                 CDEBUG_LIMIT(level,
 673                              "foreign magic 0x%08X, length %u, type %u, flags %u, value '%.*s'\n",
 674                              le32_to_cpu(lfm->lfm_magic),
 675                              le32_to_cpu(lfm->lfm_length),
 676                              le32_to_cpu(lfm->lfm_type),
 677                              le32_to_cpu(lfm->lfm_flags),
 678                              le32_to_cpu(lfm->lfm_length), lfm->lfm_value);
 679                 return;
 680         }
 681
 682         lmm1 = &lmv->lmv_md_v1;
 683         CDEBUG(level,
 684                "magic 0x%08X, master %#X stripe_count %#x hash_type %#x\n",
 685                le32_to_cpu(lmm1->lmv_magic),
 686                le32_to_cpu(lmm1->lmv_master_mdt_index),
 687                le32_to_cpu(lmm1->lmv_stripe_count),
 688                le32_to_cpu(lmm1->lmv_hash_type));
 689
 690         if (le32_to_cpu(lmm1->lmv_magic) == LMV_MAGIC_STRIPE)
 691                 return;
 692
 693         for (i = 0; i < le32_to_cpu(lmm1->lmv_stripe_count); i++) {
 694                 struct lu_fid fid;
 695
 696                 fid_le_to_cpu(&fid, &lmm1->lmv_stripe_fids[i]);
 697                 CDEBUG(level, "idx %u subobj "DFID"\n", i, PFID(&fid));
 698         }
 699 }
 700
 701 /* Shrink and/or grow reply buffers */
 702 int mdt_fix_reply(struct mdt_thread_info *info)
 703 {
 704         struct req_capsule *pill = info->mti_pill;
 705         struct mdt_body    *body;
 706         int                md_size, md_packed = 0;
 707         int                acl_size;
 708         int                rc = 0;
 709         ENTRY;
 710
 711         body = req_capsule_server_get(pill, &RMF_MDT_BODY);
 712         LASSERT(body != NULL);
 713
 714         if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE |
 715                                OBD_MD_LINKNAME))
 716                 md_size = body->mbo_eadatasize;
 717         else
 718                 md_size = 0;
 719
 720         acl_size = body->mbo_aclsize;
 721
 722         /* this replay - not send info to client */
 723         if (info->mti_spec.no_create) {
 724                 md_size = 0;
 725                 acl_size = 0;
 726         }
 727
 728         CDEBUG(D_INFO, "Shrink to md_size = %d cookie/acl_size = %d\n",
 729                md_size, acl_size);
 730 /*
 731             &RMF_MDT_BODY,
 732             &RMF_MDT_MD,
 733             &RMF_ACL, or &RMF_LOGCOOKIES
 734 (optional)  &RMF_CAPA1,
 735 (optional)  &RMF_CAPA2,
 736 (optional)  something else
 737 */
 738
 739         /* MDT_MD buffer may be bigger than packed value, let's shrink all
 740          * buffers before growing it */
 741         if (info->mti_big_lmm_used) {
 742                 /* big_lmm buffer may be used even without packing the result
 743                  * into reply, just for internal server needs */
 744                 if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER))
 745                         md_packed = req_capsule_get_size(pill, &RMF_MDT_MD,
 746                                                          RCL_SERVER);
 747
 748                 /* free big lmm if md_size is not needed */
 749                 if (md_size == 0 || md_packed == 0) {
 750                         info->mti_big_lmm_used = 0;
 751                 } else {
 752                         /* buffer must be allocated separately */
 753                         LASSERT(info->mti_attr.ma_lmm !=
 754                                 req_capsule_server_get(pill, &RMF_MDT_MD));
 755                         req_capsule_shrink(pill, &RMF_MDT_MD, 0, RCL_SERVER);
 756                 }
 757         } else if (req_capsule_has_field(pill, &RMF_MDT_MD, RCL_SERVER)) {
 758                 req_capsule_shrink(pill, &RMF_MDT_MD, md_size, RCL_SERVER);
 759         }
 760
 761         if (info->mti_big_acl_used) {
 762                 if (acl_size == 0)
 763                         info->mti_big_acl_used = 0;
 764                 else
 765                         req_capsule_shrink(pill, &RMF_ACL, 0, RCL_SERVER);
 766         } else if (req_capsule_has_field(pill, &RMF_ACL, RCL_SERVER)) {
 767                 req_capsule_shrink(pill, &RMF_ACL, acl_size, RCL_SERVER);
 768         } else if (req_capsule_has_field(pill, &RMF_LOGCOOKIES, RCL_SERVER)) {
 769                 req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
 770         }
 771
 772         /* Shrink optional SECCTX buffer if it is not used */
 773         if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
 774             req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0 &&
 775             !(body->mbo_valid & OBD_MD_SECCTX))
 776                 req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0, RCL_SERVER);
 777
 778         /* Shrink optional ENCCTX buffer if it is not used */
 779         if (req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_SERVER) &&
 780             req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_SERVER) != 0 &&
 781             !(body->mbo_valid & OBD_MD_ENCCTX))
 782                 req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0, RCL_SERVER);
 783
 784         /*
 785          * Some more field should be shrinked if needed.
 786          * This should be done by those who added fields to reply message.
 787          */
 788
 789         /* Grow MD buffer if needed finally */
 790         if (info->mti_big_lmm_used) {
 791                 void *lmm;
 792
 793                 LASSERT(md_size > md_packed);
 794                 CDEBUG(D_INFO, "Enlarge reply buffer, need extra %d bytes\n",
 795                        md_size - md_packed);
 796                 rc = req_capsule_server_grow(pill, &RMF_MDT_MD, md_size);
 797                 if (rc) {
 798                         /* we can't answer with proper LOV EA, drop flags,
 799                          * the rc is also returned so this request is
 800                          * considered as failed */
 801                         body->mbo_valid &= ~(OBD_MD_FLDIREA | OBD_MD_FLEASIZE);
 802                         /* don't return transno along with error */
 803                         lustre_msg_set_transno(pill->rc_req->rq_repmsg, 0);
 804                 } else {
 805                         /* now we need to pack right LOV/LMV EA */
 806                         lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
 807                         if (info->mti_attr.ma_valid & MA_LOV) {
 808                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 809                                                              RCL_SERVER) ==
 810                                                 info->mti_attr.ma_lmm_size);
 811                                 memcpy(lmm, info->mti_attr.ma_lmm,
 812                                        info->mti_attr.ma_lmm_size);
 813                         } else if (info->mti_attr.ma_valid & MA_LMV) {
 814                                 LASSERT(req_capsule_get_size(pill, &RMF_MDT_MD,
 815                                                              RCL_SERVER) ==
 816                                                 info->mti_attr.ma_lmv_size);
 817                                 memcpy(lmm, info->mti_attr.ma_lmv,
 818                                        info->mti_attr.ma_lmv_size);
 819                         }
 820                 }
 821
 822                 /* update mdt_max_mdsize so clients will be aware about that */
 823                 if (info->mti_mdt->mdt_max_mdsize < info->mti_attr.ma_lmm_size)
 824                         info->mti_mdt->mdt_max_mdsize =
 825                                                 info->mti_attr.ma_lmm_size;
 826                 info->mti_big_lmm_used = 0;
 827         }
 828
 829         if (info->mti_big_acl_used) {
 830                 CDEBUG(D_INFO, "Enlarge reply ACL buffer to %d bytes\n",
 831                        acl_size);
 832
 833                 rc = req_capsule_server_grow(pill, &RMF_ACL, acl_size);
 834                 if (rc) {
 835                         body->mbo_valid &= ~OBD_MD_FLACL;
 836                 } else {
 837                         void *acl = req_capsule_server_get(pill, &RMF_ACL);
 838
 839                         memcpy(acl, info->mti_big_acl, acl_size);
 840                 }
 841
 842                 info->mti_big_acl_used = 0;
 843         }
 844
 845         RETURN(rc);
 846 }
 847
 848
 849 /* if object is dying, pack the lov/llog data,
 850  * parameter info->mti_attr should be valid at this point!
 851  * Also implements RAoLU policy */
 852 int mdt_handle_last_unlink(struct mdt_thread_info *info, struct mdt_object *mo,
 853                            struct md_attr *ma)
 854 {
 855         struct mdt_body *repbody = NULL;
 856         const struct lu_attr *la = &ma->ma_attr;
 857         struct coordinator *cdt = &info->mti_mdt->mdt_coordinator;
 858         int rc;
 859         __u64 need = 0;
 860         struct hsm_action_item hai = {
 861                 .hai_len = sizeof(hai),
 862                 .hai_action = HSMA_REMOVE,
 863                 .hai_extent.length = -1,
 864                 .hai_cookie = 0,
 865                 .hai_gid = 0,
 866         };
 867         int archive_id;
 868
 869         ENTRY;
 870
 871         if (mdt_info_req(info) != NULL) {
 872                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 873                 LASSERT(repbody != NULL);
 874         } else {
 875                 CDEBUG(D_INFO, "not running in a request/reply context\n");
 876         }
 877
 878         if ((ma->ma_valid & MA_INODE) && repbody != NULL)
 879                 mdt_pack_attr2body(info, repbody, la, mdt_object_fid(mo));
 880
 881         if (ma->ma_valid & MA_LOV) {
 882                 CERROR("No need in LOV EA upon unlink\n");
 883                 dump_stack();
 884         }
 885         if (repbody != NULL)
 886                 repbody->mbo_eadatasize = 0;
 887
 888         /* Only check unlinked and archived if RAoLU and upon last close */
 889         if (!cdt->cdt_remove_archive_on_last_unlink ||
 890             atomic_read(&mo->mot_open_count) != 0)
 891                 RETURN(0);
 892
 893         /* mdt_attr_get_complex will clear ma_valid, so check here first */
 894         if ((ma->ma_valid & MA_INODE) && (ma->ma_attr.la_nlink != 0))
 895                 RETURN(0);
 896
 897         if ((ma->ma_valid & MA_HSM) && (!(ma->ma_hsm.mh_flags & HS_EXISTS)))
 898                 RETURN(0);
 899
 900         need |= (MA_INODE | MA_HSM) & ~ma->ma_valid;
 901         if (need != 0) {
 902                 /* ma->ma_valid is missing either MA_INODE, MA_HSM, or both,
 903                  * try setting them */
 904                 ma->ma_need |= need;
 905                 rc = mdt_attr_get_complex(info, mo, ma);
 906                 if (rc) {
 907                         CERROR("%s: unable to fetch missing attributes of"
 908                                DFID": rc=%d\n", mdt_obd_name(info->mti_mdt),
 909                                PFID(mdt_object_fid(mo)), rc);
 910                         RETURN(0);
 911                 }
 912
 913                 if (need & MA_INODE) {
 914                         if (ma->ma_valid & MA_INODE) {
 915                                 if (ma->ma_attr.la_nlink != 0)
 916                                         RETURN(0);
 917                         } else {
 918                                 RETURN(0);
 919                         }
 920                 }
 921
 922                 if (need & MA_HSM) {
 923                         if (ma->ma_valid & MA_HSM) {
 924                                 if (!(ma->ma_hsm.mh_flags & HS_EXISTS))
 925                                         RETURN(0);
 926                         } else {
 927                                 RETURN(0);
 928                         }
 929                 }
 930         }
 931
 932         /* RAoLU policy is active, last close on file has occured,
 933          * file is unlinked, file is archived, so create remove request
 934          * for copytool!
 935          * If CDT is not running, requests will be logged for later. */
 936         if (ma->ma_hsm.mh_arch_id != 0)
 937                 archive_id = ma->ma_hsm.mh_arch_id;
 938         else
 939                 archive_id = cdt->cdt_default_archive_id;
 940
 941         hai.hai_fid = *mdt_object_fid(mo);
 942
 943         rc = mdt_agent_record_add(info->mti_env, info->mti_mdt, archive_id, 0,
 944                                   &hai);
 945         if (rc)
 946                 CERROR("%s: unable to add HSM remove request for "DFID
 947                        ": rc=%d\n", mdt_obd_name(info->mti_mdt),
 948                        PFID(mdt_object_fid(mo)), rc);
 949
 950         RETURN(0);
 951 }
 952
 953 static __u64 mdt_attr_valid_xlate(enum mds_attr_flags in,
 954                                   struct mdt_reint_record *rr,
 955                                   struct md_attr *ma)
 956 {
 957         __u64 out;
 958
 959         out = 0;
 960         if (in & MDS_ATTR_MODE)
 961                 out |= LA_MODE;
 962         if (in & MDS_ATTR_UID)
 963                 out |= LA_UID;
 964         if (in & MDS_ATTR_GID)
 965                 out |= LA_GID;
 966         if (in & MDS_ATTR_SIZE)
 967                 out |= LA_SIZE;
 968         if (in & MDS_ATTR_BLOCKS)
 969                 out |= LA_BLOCKS;
 970         if (in & MDS_ATTR_ATIME_SET)
 971                 out |= LA_ATIME;
 972         if (in & MDS_ATTR_CTIME_SET)
 973                 out |= LA_CTIME;
 974         if (in & MDS_ATTR_MTIME_SET)
 975                 out |= LA_MTIME;
 976         if (in & MDS_ATTR_ATTR_FLAG)
 977                 out |= LA_FLAGS;
 978         if (in & MDS_ATTR_KILL_SUID)
 979                 out |= LA_KILL_SUID;
 980         if (in & MDS_ATTR_KILL_SGID)
 981                 out |= LA_KILL_SGID;
 982         if (in & MDS_ATTR_PROJID)
 983                 out |= LA_PROJID;
 984         if (in & MDS_ATTR_LSIZE)
 985                 out |= LA_LSIZE;
 986         if (in & MDS_ATTR_LBLOCKS)
 987                 out |= LA_LBLOCKS;
 988
 989         if (in & MDS_ATTR_FROM_OPEN)
 990                 rr->rr_flags |= MRF_OPEN_TRUNC;
 991         if (in & MDS_ATTR_OVERRIDE)
 992                 ma->ma_attr_flags |= MDS_OWNEROVERRIDE;
 993         if (in & MDS_ATTR_FORCE)
 994                 ma->ma_attr_flags |= MDS_PERM_BYPASS;
 995
 996         in &= ~(MDS_ATTR_MODE | MDS_ATTR_UID | MDS_ATTR_GID | MDS_ATTR_PROJID |
 997                 MDS_ATTR_ATIME | MDS_ATTR_MTIME | MDS_ATTR_CTIME |
 998                 MDS_ATTR_ATIME_SET | MDS_ATTR_CTIME_SET | MDS_ATTR_MTIME_SET |
 999                 MDS_ATTR_SIZE | MDS_ATTR_BLOCKS | MDS_ATTR_ATTR_FLAG |
1000                 MDS_ATTR_FORCE | MDS_ATTR_KILL_SUID | MDS_ATTR_KILL_SGID |
1001                 MDS_ATTR_FROM_OPEN | MDS_ATTR_LSIZE | MDS_ATTR_LBLOCKS |
1002                 MDS_ATTR_OVERRIDE);
1003         if (in != 0)
1004                 CDEBUG(D_INFO, "Unknown attr bits: %#llx\n", (u64)in);
1005
1006         return out;
1007 }
1008
1009 /* unpacking */
1010
1011 int mdt_name_unpack(struct req_capsule *pill,
1012                     const struct req_msg_field *field,
1013                     struct lu_name *ln,
1014                     enum mdt_name_flags flags)
1015 {
1016         ln->ln_name = req_capsule_client_get(pill, field);
1017         ln->ln_namelen = req_capsule_get_size(pill, field, RCL_CLIENT) - 1;
1018
1019         if (!lu_name_is_valid(ln)) {
1020                 ln->ln_name = NULL;
1021                 ln->ln_namelen = 0;
1022
1023                 return -EPROTO;
1024         }
1025
1026         if ((flags & MNF_FIX_ANON) &&
1027             ln->ln_namelen == 1 && ln->ln_name[0] == '/') {
1028                 /* Newer (3.x) kernels use a name of "/" for the
1029                  * "anonymous" disconnected dentries from NFS
1030                  * filehandle conversion. See d_obtain_alias(). */
1031                 ln->ln_name = NULL;
1032                 ln->ln_namelen = 0;
1033         }
1034
1035         return 0;
1036 }
1037
1038 static int mdt_file_secctx_unpack(struct req_capsule *pill,
1039                                   const char **secctx_name,
1040                                   void **secctx, size_t *secctx_size)
1041 {
1042         const char *name;
1043         size_t name_size;
1044
1045         *secctx_name = NULL;
1046         *secctx = NULL;
1047         *secctx_size = 0;
1048
1049         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT) ||
1050             !req_capsule_field_present(pill, &RMF_FILE_SECCTX_NAME, RCL_CLIENT))
1051                 return 0;
1052
1053         name_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX_NAME,
1054                                          RCL_CLIENT);
1055         if (name_size == 0)
1056                 return 0;
1057
1058         if (name_size > XATTR_NAME_MAX + 1)
1059                 return -EPROTO;
1060
1061         name = req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1062         if (strnlen(name, name_size) != name_size - 1)
1063                 return -EPROTO;
1064
1065         if (!req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_CLIENT) ||
1066             !req_capsule_field_present(pill, &RMF_FILE_SECCTX, RCL_CLIENT))
1067                 return -EPROTO;
1068
1069         *secctx_name = name;
1070         *secctx = req_capsule_client_get(pill, &RMF_FILE_SECCTX);
1071         *secctx_size = req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_CLIENT);
1072
1073         return 0;
1074 }
1075
1076 static int mdt_file_encctx_unpack(struct req_capsule *pill,
1077                                   void **encctx, size_t *encctx_size)
1078 {
1079         *encctx = NULL;
1080         *encctx_size = 0;
1081
1082         if (!exp_connect_encrypt(pill->rc_req->rq_export))
1083                 return 0;
1084
1085         if (!req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_CLIENT) ||
1086             !req_capsule_field_present(pill, &RMF_FILE_ENCCTX, RCL_CLIENT))
1087                 return -EPROTO;
1088
1089         *encctx_size = req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_CLIENT);
1090         if (*encctx_size == 0)
1091                 return 0;
1092
1093         *encctx = req_capsule_client_get(pill, &RMF_FILE_ENCCTX);
1094
1095         return 0;
1096 }
1097
1098 static int mdt_setattr_unpack_rec(struct mdt_thread_info *info)
1099 {
1100         struct lu_ucred *uc = mdt_ucred(info);
1101         struct md_attr *ma = &info->mti_attr;
1102         struct lu_attr *la = &ma->ma_attr;
1103         struct req_capsule *pill = info->mti_pill;
1104         struct mdt_reint_record *rr = &info->mti_rr;
1105         struct mdt_rec_setattr *rec;
1106         struct lu_nodemap *nodemap;
1107
1108         ENTRY;
1109
1110         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1111         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1112         if (rec == NULL)
1113                 RETURN(-EFAULT);
1114
1115         /* This prior initialization is needed for old_init_ucred_reint() */
1116         uc->uc_fsuid = rec->sa_fsuid;
1117         uc->uc_fsgid = rec->sa_fsgid;
1118         uc->uc_cap   = rec->sa_cap;
1119         uc->uc_suppgids[0] = rec->sa_suppgid;
1120         uc->uc_suppgids[1] = -1;
1121
1122         rr->rr_fid1 = &rec->sa_fid;
1123         la->la_valid = mdt_attr_valid_xlate(rec->sa_valid, rr, ma);
1124         la->la_mode  = rec->sa_mode;
1125         la->la_flags = rec->sa_attr_flags;
1126
1127         nodemap = nodemap_get_from_exp(info->mti_exp);
1128         if (IS_ERR(nodemap))
1129                 RETURN(PTR_ERR(nodemap));
1130
1131         la->la_uid   = nodemap_map_id(nodemap, NODEMAP_UID,
1132                                       NODEMAP_CLIENT_TO_FS, rec->sa_uid);
1133         la->la_gid   = nodemap_map_id(nodemap, NODEMAP_GID,
1134                                       NODEMAP_CLIENT_TO_FS, rec->sa_gid);
1135         la->la_projid = rec->sa_projid;
1136         nodemap_putref(nodemap);
1137
1138         la->la_size  = rec->sa_size;
1139         la->la_blocks = rec->sa_blocks;
1140         la->la_ctime = rec->sa_ctime;
1141         la->la_atime = rec->sa_atime;
1142         la->la_mtime = rec->sa_mtime;
1143         ma->ma_valid = MA_INODE;
1144
1145         ma->ma_attr_flags |= rec->sa_bias & (MDS_CLOSE_INTENT |
1146                                 MDS_DATA_MODIFIED | MDS_TRUNC_KEEP_LEASE |
1147                                 MDS_PCC_ATTACH);
1148         RETURN(0);
1149 }
1150
1151 static int mdt_close_handle_unpack(struct mdt_thread_info *info)
1152 {
1153         struct req_capsule *pill = info->mti_pill;
1154         struct mdt_ioepoch *ioepoch;
1155         ENTRY;
1156
1157         if (req_capsule_get_size(pill, &RMF_MDT_EPOCH, RCL_CLIENT))
1158                 ioepoch = req_capsule_client_get(pill, &RMF_MDT_EPOCH);
1159         else
1160                 ioepoch = NULL;
1161
1162         if (ioepoch == NULL)
1163                 RETURN(-EPROTO);
1164
1165         info->mti_open_handle = ioepoch->mio_open_handle;
1166
1167         RETURN(0);
1168 }
1169
1170 static inline int mdt_dlmreq_unpack(struct mdt_thread_info *info) {
1171         struct req_capsule      *pill = info->mti_pill;
1172
1173         if (req_capsule_get_size(pill, &RMF_DLM_REQ, RCL_CLIENT)) {
1174                 info->mti_dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
1175                 if (info->mti_dlm_req == NULL)
1176                         RETURN(-EFAULT);
1177         }
1178
1179         RETURN(0);
1180 }
1181
1182 static int mdt_setattr_unpack(struct mdt_thread_info *info)
1183 {
1184         struct mdt_reint_record *rr = &info->mti_rr;
1185         struct md_attr          *ma = &info->mti_attr;
1186         struct req_capsule      *pill = info->mti_pill;
1187         int rc;
1188         ENTRY;
1189
1190         rc = mdt_setattr_unpack_rec(info);
1191         if (rc)
1192                 RETURN(rc);
1193
1194         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1195                 rr->rr_eadata = req_capsule_client_get(pill, &RMF_EADATA);
1196                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1197                                                         RCL_CLIENT);
1198
1199                 if (rr->rr_eadatalen > 0) {
1200                         const struct lmv_user_md        *lum;
1201
1202                         lum = rr->rr_eadata;
1203                         /* Sigh ma_valid(from req) does not indicate whether
1204                          * it will set LOV/LMV EA, so we have to check magic */
1205                         if (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC) {
1206                                 ma->ma_valid |= MA_LMV;
1207                                 ma->ma_lmv = (void *)rr->rr_eadata;
1208                                 ma->ma_lmv_size = rr->rr_eadatalen;
1209                         } else {
1210                                 ma->ma_valid |= MA_LOV;
1211                                 ma->ma_lmm = (void *)rr->rr_eadata;
1212                                 ma->ma_lmm_size = rr->rr_eadatalen;
1213                         }
1214                 }
1215         }
1216
1217         rc = mdt_dlmreq_unpack(info);
1218         RETURN(rc);
1219 }
1220
1221 static int mdt_close_intent_unpack(struct mdt_thread_info *info)
1222 {
1223         struct md_attr          *ma = &info->mti_attr;
1224         struct req_capsule      *pill = info->mti_pill;
1225         ENTRY;
1226
1227         if (!(ma->ma_attr_flags & MDS_CLOSE_INTENT))
1228                 RETURN(0);
1229
1230         req_capsule_extend(pill, &RQF_MDS_CLOSE_INTENT);
1231
1232         if (!(req_capsule_has_field(pill, &RMF_CLOSE_DATA, RCL_CLIENT) &&
1233             req_capsule_field_present(pill, &RMF_CLOSE_DATA, RCL_CLIENT)))
1234                 RETURN(-EFAULT);
1235
1236         RETURN(0);
1237 }
1238
1239 int mdt_close_unpack(struct mdt_thread_info *info)
1240 {
1241         int rc;
1242         ENTRY;
1243
1244         rc = mdt_close_handle_unpack(info);
1245         if (rc)
1246                 RETURN(rc);
1247
1248         rc = mdt_setattr_unpack_rec(info);
1249         if (rc)
1250                 RETURN(rc);
1251
1252         rc = mdt_close_intent_unpack(info);
1253         if (rc)
1254                 RETURN(rc);
1255
1256         RETURN(mdt_init_ucred_reint(info));
1257 }
1258
1259 static int mdt_create_unpack(struct mdt_thread_info *info)
1260 {
1261         struct lu_ucred *uc  = mdt_ucred(info);
1262         struct mdt_rec_create *rec;
1263         struct lu_attr *attr = &info->mti_attr.ma_attr;
1264         struct mdt_reint_record *rr = &info->mti_rr;
1265         struct req_capsule      *pill = info->mti_pill;
1266         struct md_op_spec       *sp = &info->mti_spec;
1267         int rc;
1268
1269         ENTRY;
1270
1271         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1272         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1273         if (rec == NULL)
1274                 RETURN(-EFAULT);
1275
1276         /* This prior initialization is needed for old_init_ucred_reint() */
1277         uc->uc_fsuid = rec->cr_fsuid;
1278         uc->uc_fsgid = rec->cr_fsgid;
1279         uc->uc_cap   = rec->cr_cap;
1280         uc->uc_suppgids[0] = rec->cr_suppgid1;
1281         uc->uc_suppgids[1] = -1;
1282         uc->uc_umask = rec->cr_umask;
1283
1284         rr->rr_fid1 = &rec->cr_fid1;
1285         rr->rr_fid2 = &rec->cr_fid2;
1286         attr->la_mode = rec->cr_mode;
1287         attr->la_rdev  = rec->cr_rdev;
1288         attr->la_uid   = rec->cr_fsuid;
1289         attr->la_gid   = rec->cr_fsgid;
1290         attr->la_ctime = rec->cr_time;
1291         attr->la_mtime = rec->cr_time;
1292         attr->la_atime = rec->cr_time;
1293         attr->la_valid = LA_MODE | LA_RDEV | LA_UID | LA_GID | LA_TYPE |
1294                          LA_CTIME | LA_MTIME | LA_ATIME;
1295         memset(&sp->u, 0, sizeof(sp->u));
1296         sp->sp_cr_flags = get_mrc_cr_flags(rec);
1297
1298         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1299         if (rc < 0)
1300                 RETURN(rc);
1301
1302         if (S_ISLNK(attr->la_mode)) {
1303                 const char *tgt = NULL;
1304
1305                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_SYM);
1306                 if (req_capsule_get_size(pill, &RMF_SYMTGT, RCL_CLIENT)) {
1307                         tgt = req_capsule_client_get(pill, &RMF_SYMTGT);
1308                         sp->u.sp_symname = tgt;
1309                 }
1310                 if (tgt == NULL)
1311                         RETURN(-EFAULT);
1312         } else {
1313                 req_capsule_extend(pill, &RQF_MDS_REINT_CREATE_ACL);
1314                 if (S_ISDIR(attr->la_mode) &&
1315                     req_capsule_get_size(pill, &RMF_EADATA, RCL_CLIENT) > 0) {
1316                         sp->u.sp_ea.eadata =
1317                                 req_capsule_client_get(pill, &RMF_EADATA);
1318                         sp->u.sp_ea.eadatalen =
1319                                 req_capsule_get_size(pill, &RMF_EADATA,
1320                                                      RCL_CLIENT);
1321                         sp->sp_cr_flags |= MDS_OPEN_HAS_EA;
1322                 }
1323         }
1324
1325         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1326                                     &sp->sp_cr_file_secctx,
1327                                     &sp->sp_cr_file_secctx_size);
1328         if (rc < 0)
1329                 RETURN(rc);
1330
1331         rc = mdt_file_encctx_unpack(pill, &sp->sp_cr_file_encctx,
1332                                     &sp->sp_cr_file_encctx_size);
1333         if (rc < 0)
1334                 RETURN(rc);
1335
1336         rc = req_check_sepol(pill);
1337         if (rc)
1338                 RETURN(rc);
1339
1340         rc = mdt_dlmreq_unpack(info);
1341         RETURN(rc);
1342 }
1343
1344 static int mdt_link_unpack(struct mdt_thread_info *info)
1345 {
1346         struct lu_ucred *uc  = mdt_ucred(info);
1347         struct mdt_rec_link *rec;
1348         struct lu_attr *attr = &info->mti_attr.ma_attr;
1349         struct mdt_reint_record *rr = &info->mti_rr;
1350         struct req_capsule *pill = info->mti_pill;
1351         int rc;
1352
1353         ENTRY;
1354
1355         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1356         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1357         if (rec == NULL)
1358                 RETURN(-EFAULT);
1359
1360         /* This prior initialization is needed for old_init_ucred_reint() */
1361         uc->uc_fsuid = rec->lk_fsuid;
1362         uc->uc_fsgid = rec->lk_fsgid;
1363         uc->uc_cap   = rec->lk_cap;
1364         uc->uc_suppgids[0] = rec->lk_suppgid1;
1365         uc->uc_suppgids[1] = rec->lk_suppgid2;
1366
1367         attr->la_uid = rec->lk_fsuid;
1368         attr->la_gid = rec->lk_fsgid;
1369         rr->rr_fid1 = &rec->lk_fid1;
1370         rr->rr_fid2 = &rec->lk_fid2;
1371         attr->la_ctime = rec->lk_time;
1372         attr->la_mtime = rec->lk_time;
1373         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME;
1374
1375         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1376         if (rc < 0)
1377                 RETURN(rc);
1378
1379         rc = req_check_sepol(pill);
1380         if (rc)
1381                 RETURN(rc);
1382
1383         rc = mdt_dlmreq_unpack(info);
1384
1385         RETURN(rc);
1386 }
1387
1388 static int mdt_unlink_unpack(struct mdt_thread_info *info)
1389 {
1390         struct lu_ucred *uc  = mdt_ucred(info);
1391         struct mdt_rec_unlink *rec;
1392         struct lu_attr *attr = &info->mti_attr.ma_attr;
1393         struct mdt_reint_record *rr = &info->mti_rr;
1394         struct req_capsule      *pill = info->mti_pill;
1395         int rc;
1396
1397         ENTRY;
1398
1399         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1400         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1401         if (rec == NULL)
1402                 RETURN(-EFAULT);
1403
1404         /* This prior initialization is needed for old_init_ucred_reint() */
1405         uc->uc_fsuid = rec->ul_fsuid;
1406         uc->uc_fsgid = rec->ul_fsgid;
1407         uc->uc_cap   = rec->ul_cap;
1408         uc->uc_suppgids[0] = rec->ul_suppgid1;
1409         uc->uc_suppgids[1] = -1;
1410
1411         attr->la_uid = rec->ul_fsuid;
1412         attr->la_gid = rec->ul_fsgid;
1413         rr->rr_fid1 = &rec->ul_fid1;
1414         rr->rr_fid2 = &rec->ul_fid2;
1415         attr->la_ctime = rec->ul_time;
1416         attr->la_mtime = rec->ul_time;
1417         attr->la_mode  = rec->ul_mode;
1418         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1419
1420         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1421         if (rc < 0)
1422                 RETURN(rc);
1423
1424         info->mti_spec.no_create = !!req_is_replay(mdt_info_req(info));
1425
1426         rc = req_check_sepol(pill);
1427         if (rc)
1428                 RETURN(rc);
1429
1430         rc = mdt_dlmreq_unpack(info);
1431         RETURN(rc);
1432 }
1433
1434 static int mdt_rmentry_unpack(struct mdt_thread_info *info)
1435 {
1436         info->mti_spec.sp_rm_entry = 1;
1437         return mdt_unlink_unpack(info);
1438 }
1439
1440 static int mdt_rename_unpack(struct mdt_thread_info *info)
1441 {
1442         struct lu_ucred *uc = mdt_ucred(info);
1443         struct mdt_rec_rename *rec;
1444         struct lu_attr *attr = &info->mti_attr.ma_attr;
1445         struct mdt_reint_record *rr = &info->mti_rr;
1446         struct req_capsule *pill = info->mti_pill;
1447         struct md_op_spec *spec = &info->mti_spec;
1448         int rc;
1449
1450         ENTRY;
1451
1452         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1453         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1454         if (rec == NULL)
1455                 RETURN(-EFAULT);
1456
1457         /* This prior initialization is needed for old_init_ucred_reint() */
1458         uc->uc_fsuid = rec->rn_fsuid;
1459         uc->uc_fsgid = rec->rn_fsgid;
1460         uc->uc_cap   = rec->rn_cap;
1461         uc->uc_suppgids[0] = rec->rn_suppgid1;
1462         uc->uc_suppgids[1] = rec->rn_suppgid2;
1463
1464         attr->la_uid = rec->rn_fsuid;
1465         attr->la_gid = rec->rn_fsgid;
1466         rr->rr_fid1 = &rec->rn_fid1;
1467         rr->rr_fid2 = &rec->rn_fid2;
1468         attr->la_ctime = rec->rn_time;
1469         attr->la_mtime = rec->rn_time;
1470         /* rename_tgt contains the mode already */
1471         attr->la_mode = rec->rn_mode;
1472         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1473
1474         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1475         if (rc < 0)
1476                 RETURN(rc);
1477
1478         rc = mdt_name_unpack(pill, &RMF_SYMTGT, &rr->rr_tgt_name, 0);
1479         if (rc < 0)
1480                 RETURN(rc);
1481
1482         spec->no_create = !!req_is_replay(mdt_info_req(info));
1483
1484         rc = req_check_sepol(pill);
1485         if (rc)
1486                 RETURN(rc);
1487
1488         rc = mdt_dlmreq_unpack(info);
1489
1490         RETURN(rc);
1491 }
1492
1493 static int mdt_migrate_unpack(struct mdt_thread_info *info)
1494 {
1495         struct lu_ucred *uc = mdt_ucred(info);
1496         struct mdt_rec_rename *rec;
1497         struct lu_attr *attr = &info->mti_attr.ma_attr;
1498         struct mdt_reint_record *rr = &info->mti_rr;
1499         struct req_capsule *pill = info->mti_pill;
1500         struct md_op_spec *spec = &info->mti_spec;
1501         int rc;
1502
1503         ENTRY;
1504
1505         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1506         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1507         if (rec == NULL)
1508                 RETURN(-EFAULT);
1509
1510         /* This prior initialization is needed for old_init_ucred_reint() */
1511         uc->uc_fsuid = rec->rn_fsuid;
1512         uc->uc_fsgid = rec->rn_fsgid;
1513         uc->uc_cap   = rec->rn_cap;
1514         uc->uc_suppgids[0] = rec->rn_suppgid1;
1515         uc->uc_suppgids[1] = rec->rn_suppgid2;
1516
1517         attr->la_uid = rec->rn_fsuid;
1518         attr->la_gid = rec->rn_fsgid;
1519         rr->rr_fid1 = &rec->rn_fid1;
1520         rr->rr_fid2 = &rec->rn_fid2;
1521         attr->la_ctime = rec->rn_time;
1522         attr->la_mtime = rec->rn_time;
1523         /* rename_tgt contains the mode already */
1524         attr->la_mode = rec->rn_mode;
1525         attr->la_valid = LA_UID | LA_GID | LA_CTIME | LA_MTIME | LA_MODE;
1526         spec->sp_cr_flags = 0;
1527
1528         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1529         if (rc < 0)
1530                 RETURN(rc);
1531
1532         if (rec->rn_bias & MDS_CLOSE_MIGRATE) {
1533                 rc = mdt_close_handle_unpack(info);
1534                 if (rc)
1535                         RETURN(rc);
1536
1537                 spec->sp_migrate_close = 1;
1538         } else {
1539                 spec->sp_migrate_close = 0;
1540         }
1541         spec->sp_migrate_nsonly = 0;
1542
1543         /* lustre version > 2.11 migration packs lum */
1544         if (req_capsule_has_field(pill, &RMF_EADATA, RCL_CLIENT)) {
1545                 if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1546                         rr->rr_eadatalen = req_capsule_get_size(pill,
1547                                                                 &RMF_EADATA,
1548                                                                 RCL_CLIENT);
1549
1550                         if (rr->rr_eadatalen > 0) {
1551                                 rr->rr_eadata = req_capsule_client_get(pill,
1552                                                                 &RMF_EADATA);
1553                                 spec->u.sp_ea.eadatalen = rr->rr_eadatalen;
1554                                 spec->u.sp_ea.eadata = rr->rr_eadata;
1555                                 spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
1556                         }
1557                 } else {
1558                         /* old client doesn't provide lum. */
1559                         RETURN(-EOPNOTSUPP);
1560                 }
1561         }
1562
1563         spec->no_create = !!req_is_replay(mdt_info_req(info));
1564
1565         rc = mdt_dlmreq_unpack(info);
1566
1567         RETURN(rc);
1568 }
1569
1570 /*
1571  * please see comment above LOV_MAGIC_V1_DEFINED
1572  */
1573 void mdt_fix_lov_magic(struct mdt_thread_info *info, void *eadata)
1574 {
1575         struct lov_user_md_v1   *v1 = eadata;
1576
1577         LASSERT(v1);
1578
1579         if (unlikely(req_is_replay(mdt_info_req(info)))) {
1580                 if ((v1->lmm_magic & LOV_MAGIC_MASK) == LOV_MAGIC_MAGIC)
1581                         v1->lmm_magic |= LOV_MAGIC_DEFINED;
1582                 else if ((v1->lmm_magic & __swab32(LOV_MAGIC_MAGIC)) ==
1583                          __swab32(LOV_MAGIC_MAGIC))
1584                         v1->lmm_magic |= __swab32(LOV_MAGIC_DEFINED);
1585         }
1586 }
1587
1588 static int mdt_open_unpack(struct mdt_thread_info *info)
1589 {
1590         struct lu_ucred *uc = mdt_ucred(info);
1591         struct mdt_rec_create *rec;
1592         struct lu_attr *attr = &info->mti_attr.ma_attr;
1593         struct req_capsule *pill = info->mti_pill;
1594         struct mdt_reint_record *rr = &info->mti_rr;
1595         struct ptlrpc_request *req = mdt_info_req(info);
1596         struct md_op_spec *sp = &info->mti_spec;
1597         int rc;
1598         ENTRY;
1599
1600         BUILD_BUG_ON(sizeof(struct mdt_rec_create) !=
1601                      sizeof(struct mdt_rec_reint));
1602         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1603         if (rec == NULL)
1604                 RETURN(-EFAULT);
1605
1606         /* This prior initialization is needed for old_init_ucred_reint() */
1607         uc->uc_fsuid = rec->cr_fsuid;
1608         uc->uc_fsgid = rec->cr_fsgid;
1609         uc->uc_cap   = rec->cr_cap;
1610         uc->uc_suppgids[0] = rec->cr_suppgid1;
1611         uc->uc_suppgids[1] = rec->cr_suppgid2;
1612         uc->uc_umask = rec->cr_umask;
1613
1614         rr->rr_fid1   = &rec->cr_fid1;
1615         rr->rr_fid2   = &rec->cr_fid2;
1616         rr->rr_open_handle = &rec->cr_open_handle_old;
1617         attr->la_mode = rec->cr_mode;
1618         attr->la_rdev  = rec->cr_rdev;
1619         attr->la_uid   = rec->cr_fsuid;
1620         attr->la_gid   = rec->cr_fsgid;
1621         attr->la_ctime = rec->cr_time;
1622         attr->la_mtime = rec->cr_time;
1623         attr->la_atime = rec->cr_time;
1624         attr->la_valid = LA_MODE  | LA_RDEV  | LA_UID   | LA_GID |
1625                          LA_CTIME | LA_MTIME | LA_ATIME;
1626         memset(&info->mti_spec.u, 0, sizeof(info->mti_spec.u));
1627         info->mti_spec.sp_cr_flags = get_mrc_cr_flags(rec);
1628         /* Do not trigger ASSERTION if client miss to set such flags. */
1629         if (unlikely(info->mti_spec.sp_cr_flags == 0))
1630                 RETURN(-EPROTO);
1631
1632         info->mti_cross_ref = !!(rec->cr_bias & MDS_CROSS_REF);
1633
1634         mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, MNF_FIX_ANON);
1635
1636         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1637                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1638                                                         RCL_CLIENT);
1639
1640                 if (rr->rr_eadatalen > 0) {
1641                         rr->rr_eadata = req_capsule_client_get(pill,
1642                                                                &RMF_EADATA);
1643                         sp->u.sp_ea.eadatalen = rr->rr_eadatalen;
1644                         sp->u.sp_ea.eadata = rr->rr_eadata;
1645                         sp->sp_archive_id = rec->cr_archive_id;
1646                         sp->no_create = !!req_is_replay(req);
1647                         mdt_fix_lov_magic(info, rr->rr_eadata);
1648                 }
1649
1650                 /*
1651                  * Client default md_size may be 0 right after client start,
1652                  * until all osc are connected, set here just some reasonable
1653                  * value to prevent misbehavior.
1654                  */
1655                 if (rr->rr_eadatalen == 0 &&
1656                     !(info->mti_spec.sp_cr_flags & MDS_OPEN_DELAY_CREATE))
1657                         rr->rr_eadatalen = MIN_MD_SIZE;
1658         }
1659
1660         rc = mdt_file_secctx_unpack(pill, &sp->sp_cr_file_secctx_name,
1661                                     &sp->sp_cr_file_secctx,
1662                                     &sp->sp_cr_file_secctx_size);
1663         if (rc < 0)
1664                 RETURN(rc);
1665
1666         rc = mdt_file_encctx_unpack(pill, &sp->sp_cr_file_encctx,
1667                                     &sp->sp_cr_file_encctx_size);
1668         if (rc < 0)
1669                 RETURN(rc);
1670
1671         rc = req_check_sepol(pill);
1672         if (rc)
1673                 RETURN(rc);
1674
1675         RETURN(rc);
1676 }
1677
1678 static int mdt_setxattr_unpack(struct mdt_thread_info *info)
1679 {
1680         struct mdt_reint_record *rr = &info->mti_rr;
1681         struct lu_ucred *uc = mdt_ucred(info);
1682         struct lu_attr *attr = &info->mti_attr.ma_attr;
1683         struct req_capsule *pill = info->mti_pill;
1684         struct mdt_rec_setxattr *rec;
1685         int rc;
1686         ENTRY;
1687
1688
1689         BUILD_BUG_ON(sizeof(struct mdt_rec_setxattr) !=
1690                      sizeof(struct mdt_rec_reint));
1691         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1692         if (rec == NULL)
1693                 RETURN(-EFAULT);
1694
1695         /* This prior initialization is needed for old_init_ucred_reint() */
1696         uc->uc_fsuid  = rec->sx_fsuid;
1697         uc->uc_fsgid  = rec->sx_fsgid;
1698         uc->uc_cap    = rec->sx_cap;
1699         uc->uc_suppgids[0] = rec->sx_suppgid1;
1700         uc->uc_suppgids[1] = -1;
1701
1702         rr->rr_opcode = rec->sx_opcode;
1703         rr->rr_fid1   = &rec->sx_fid;
1704         attr->la_valid = rec->sx_valid;
1705         attr->la_ctime = rec->sx_time;
1706         attr->la_size = rec->sx_size;
1707         attr->la_flags = rec->sx_flags;
1708
1709         rc = mdt_name_unpack(pill, &RMF_NAME, &rr->rr_name, 0);
1710         if (rc < 0)
1711                 RETURN(rc);
1712
1713         if (req_capsule_field_present(pill, &RMF_EADATA, RCL_CLIENT)) {
1714                 rr->rr_eadatalen = req_capsule_get_size(pill, &RMF_EADATA,
1715                                                         RCL_CLIENT);
1716
1717                 if (rr->rr_eadatalen > info->mti_mdt->mdt_max_ea_size)
1718                         RETURN(-E2BIG);
1719
1720                 if (rr->rr_eadatalen > 0) {
1721                         rr->rr_eadata = req_capsule_client_get(pill,
1722                                                                &RMF_EADATA);
1723                         if (rr->rr_eadata == NULL)
1724                                 RETURN(-EFAULT);
1725                 } else {
1726                         rr->rr_eadata = NULL;
1727                 }
1728         } else if (!(attr->la_valid & OBD_MD_FLXATTRRM)) {
1729                 CDEBUG(D_INFO, "no xattr data supplied\n");
1730                 RETURN(-EFAULT);
1731         }
1732
1733         rc = req_check_sepol(pill);
1734         if (rc)
1735                 RETURN(rc);
1736
1737         if (mdt_dlmreq_unpack(info) < 0)
1738                 RETURN(-EPROTO);
1739
1740         RETURN(0);
1741 }
1742
1743 static int mdt_resync_unpack(struct mdt_thread_info *info)
1744 {
1745         struct req_capsule      *pill = info->mti_pill;
1746         struct mdt_reint_record *rr   = &info->mti_rr;
1747         struct lu_ucred         *uc     = mdt_ucred(info);
1748         struct mdt_rec_resync   *rec;
1749         ENTRY;
1750
1751         BUILD_BUG_ON(sizeof(*rec) != sizeof(struct mdt_rec_reint));
1752         rec = req_capsule_client_get(pill, &RMF_REC_REINT);
1753         if (rec == NULL)
1754                 RETURN(-EFAULT);
1755
1756         /* This prior initialization is needed for old_init_ucred_reint() */
1757         uc->uc_fsuid = rec->rs_fsuid;
1758         uc->uc_fsgid = rec->rs_fsgid;
1759         uc->uc_cap   = rec->rs_cap;
1760
1761         rr->rr_fid1   = &rec->rs_fid;
1762         rr->rr_mirror_id = rec->rs_mirror_id;
1763
1764         /* cookie doesn't need to be swapped but it has been swapped
1765          * in lustre_swab_mdt_rec_reint() as rr_mtime, so here it needs
1766          * restoring. */
1767         if (ptlrpc_req_need_swab(mdt_info_req(info)))
1768                 __swab64s(&rec->rs_lease_handle.cookie);
1769         rr->rr_lease_handle = &rec->rs_lease_handle;
1770
1771         RETURN(mdt_dlmreq_unpack(info));
1772 }
1773
1774 typedef int (*reint_unpacker)(struct mdt_thread_info *info);
1775
1776 static reint_unpacker mdt_reint_unpackers[REINT_MAX] = {
1777         [REINT_SETATTR]  = mdt_setattr_unpack,
1778         [REINT_CREATE]   = mdt_create_unpack,
1779         [REINT_LINK]     = mdt_link_unpack,
1780         [REINT_UNLINK]   = mdt_unlink_unpack,
1781         [REINT_RENAME]   = mdt_rename_unpack,
1782         [REINT_OPEN]     = mdt_open_unpack,
1783         [REINT_SETXATTR] = mdt_setxattr_unpack,
1784         [REINT_RMENTRY]  = mdt_rmentry_unpack,
1785         [REINT_MIGRATE]  = mdt_migrate_unpack,
1786         [REINT_RESYNC]   = mdt_resync_unpack,
1787 };
1788
1789 int mdt_reint_unpack(struct mdt_thread_info *info, __u32 op)
1790 {
1791         int rc;
1792         ENTRY;
1793
1794         memset(&info->mti_rr, 0, sizeof(info->mti_rr));
1795         if (op < REINT_MAX && mdt_reint_unpackers[op] != NULL) {
1796                 info->mti_rr.rr_opcode = op;
1797                 rc = mdt_reint_unpackers[op](info);
1798         } else {
1799                 CERROR("Unexpected opcode %d\n", op);
1800                 rc = -EFAULT;
1801         }
1802         RETURN(rc);
1803 }
1804
1805 int mdt_pack_secctx_in_reply(struct mdt_thread_info *info,
1806                              struct mdt_object *child)
1807 {
1808         char *secctx_name;
1809         struct lu_buf *buffer;
1810         struct mdt_body *repbody;
1811         struct req_capsule *pill = info->mti_pill;
1812         int rc = 0;
1813
1814         if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
1815             req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0) {
1816                 secctx_name =
1817                         req_capsule_client_get(pill, &RMF_FILE_SECCTX_NAME);
1818                 buffer = &info->mti_buf;
1819
1820                 /* fill reply buffer with security context now */
1821                 buffer->lb_len = req_capsule_get_size(pill, &RMF_FILE_SECCTX,
1822                                                       RCL_SERVER);
1823                 buffer->lb_buf = req_capsule_server_get(info->mti_pill,
1824                                                         &RMF_FILE_SECCTX);
1825                 rc = mo_xattr_get(info->mti_env, mdt_object_child(child),
1826                                   buffer, secctx_name);
1827                 if (rc >= 0) {
1828                         CDEBUG(D_SEC,
1829                                "found security context of size %d for "DFID"\n",
1830                                rc, PFID(mdt_object_fid(child)));
1831
1832                         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
1833                         repbody->mbo_valid |= OBD_MD_SECCTX;
1834                         if (rc < buffer->lb_len)
1835                                 req_capsule_shrink(pill, &RMF_FILE_SECCTX, rc,
1836                                                    RCL_SERVER);
1837                         rc = 0;
1838                 } else {
1839                         CDEBUG(D_SEC,
1840                              "security context not found for "DFID": rc = %d\n",
1841                              PFID(mdt_object_fid(child)), rc);
1842                         req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0,
1843                                            RCL_SERVER);
1844                         /* handling -ENOENT is important because it may change
1845                          * object state in DNE env dropping LOHA_EXISTS flag,
1846                          * it is important to return that to the caller.
1847                          * Check LU-13115 for details.
1848                          */
1849                         if (rc != -ENOENT)
1850                                 rc = 0;
1851                 }
1852         }
1853         return rc;
1854 }
1855
1856 /* check whether two FIDs belong to different MDT. */
1857 static int mdt_fids_different_target(struct mdt_thread_info *info,
1858                                      const struct lu_fid *fid1,
1859                                      const struct lu_fid *fid2)
1860 {
1861         const struct lu_env *env = info->mti_env;
1862         struct mdt_device *mdt = info->mti_mdt;
1863         struct lu_seq_range *range = &info->mti_range;
1864         struct seq_server_site *ss;
1865         __u32 index1, index2;
1866         int rc;
1867
1868         if (fid_seq(fid1) == fid_seq(fid2))
1869                 return 0;
1870
1871         ss = mdt->mdt_lu_dev.ld_site->ld_seq_site;
1872
1873         range->lsr_flags = LU_SEQ_RANGE_MDT;
1874         rc = fld_server_lookup(env, ss->ss_server_fld, fid1->f_seq, range);
1875         if (rc)
1876                 return rc;
1877
1878         index1 = range->lsr_index;
1879
1880         rc = fld_server_lookup(env, ss->ss_server_fld, fid2->f_seq, range);
1881         if (rc)
1882                 return rc;
1883
1884         index2 = range->lsr_index;
1885
1886         return index1 != index2;
1887 }
1888
1889 /**
1890  * Check whether \a child is remote object on \a parent.
1891  *
1892  * \param[in]  info     thread environment
1893  * \param[in]  parent   parent object, it's the same as child object in
1894  *                      getattr_by_fid
1895  * \param[in]  child    child object
1896  *
1897  * \retval 1    is remote object.
1898  * \retval 0    isn't remote object.
1899  * \retval < 1  error code
1900  */
1901 int mdt_is_remote_object(struct mdt_thread_info *info,
1902                          struct mdt_object *parent,
1903                          struct mdt_object *child)
1904 {
1905         struct lu_buf *buf = &info->mti_big_buf;
1906         struct linkea_data ldata = { NULL };
1907         struct link_ea_header *leh;
1908         struct link_ea_entry *lee;
1909         struct lu_name name;
1910         struct lu_fid pfid;
1911         int reclen;
1912         int i;
1913         int rc;
1914
1915         ENTRY;
1916
1917         if (fid_is_root(mdt_object_fid(child)))
1918                 RETURN(0);
1919
1920         if (likely(parent != child)) {
1921                 if (mdt_object_remote(parent) ^ mdt_object_remote(child))
1922                         RETURN(1);
1923
1924                 if (!mdt_object_remote(parent) && !mdt_object_remote(child))
1925                         RETURN(0);
1926
1927                 rc = mdt_fids_different_target(info, mdt_object_fid(parent),
1928                                                mdt_object_fid(child));
1929                 RETURN(rc);
1930         }
1931
1932         /* client < 2.13.52 getattr_by_fid parent and child are the same */
1933         buf = lu_buf_check_and_alloc(buf, PATH_MAX);
1934         if (!buf->lb_buf)
1935                 RETURN(-ENOMEM);
1936
1937         ldata.ld_buf = buf;
1938         rc = mdt_links_read(info, child, &ldata);
1939         /* can't read linkea, just assume it's remote object */
1940         if (rc == -ENOENT || rc == -ENODATA)
1941                 RETURN(1);
1942         if (rc)
1943                 RETURN(rc);
1944
1945         leh = buf->lb_buf;
1946         lee = (struct link_ea_entry *)(leh + 1);
1947         for (i = 0; i < leh->leh_reccount; i++) {
1948                 linkea_entry_unpack(lee, &reclen, &name, &pfid);
1949                 lee = (struct link_ea_entry *) ((char *)lee + reclen);
1950                 if (mdt_fids_different_target(info, &pfid,
1951                                               mdt_object_fid(child)))
1952                         RETURN(1);
1953         }
1954
1955         RETURN(0);
1956 }
1957
1958 int mdt_pack_encctx_in_reply(struct mdt_thread_info *info,
1959                              struct mdt_object *child)
1960 {
1961         struct lu_buf *buffer;
1962         struct mdt_body *repbody;
1963         struct req_capsule *pill = info->mti_pill;
1964         struct obd_export *exp = mdt_info_req(info)->rq_export;
1965         int rc = 0;
1966
1967         if (!exp_connect_encrypt(exp))
1968                 return rc;
1969
1970         if (req_capsule_has_field(pill, &RMF_FILE_ENCCTX, RCL_SERVER) &&
1971             req_capsule_get_size(pill, &RMF_FILE_ENCCTX, RCL_SERVER) != 0) {
1972                 struct lu_attr la = { 0 };
1973                 struct dt_object *dt = mdt_obj2dt(child);
1974
1975                 if (dt && dt->do_ops && dt->do_ops->do_attr_get)
1976                         dt_attr_get(info->mti_env, mdt_obj2dt(child), &la);
1977
1978                 if (la.la_valid & LA_FLAGS && la.la_flags & LUSTRE_ENCRYPT_FL) {
1979                         buffer = &info->mti_buf;
1980
1981                         /* fill reply buffer with encryption context now */
1982                         buffer->lb_len =
1983                                 req_capsule_get_size(pill, &RMF_FILE_ENCCTX,
1984                                                      RCL_SERVER);
1985                         buffer->lb_buf =
1986                                 req_capsule_server_get(pill, &RMF_FILE_ENCCTX);
1987                         rc = mo_xattr_get(info->mti_env,
1988                                           mdt_object_child(child),
1989                                           buffer,
1990                                           LL_XATTR_NAME_ENCRYPTION_CONTEXT);
1991                         if (rc >= 0) {
1992                                 CDEBUG(D_SEC,
1993                                        "found encryption ctx of size %d for "DFID"\n",
1994                                        rc, PFID(mdt_object_fid(child)));
1995
1996                                 repbody = req_capsule_server_get(pill,
1997                                                                  &RMF_MDT_BODY);
1998                                 repbody->mbo_valid |= OBD_MD_ENCCTX;
1999                                 if (rc < buffer->lb_len)
2000                                         req_capsule_shrink(pill,
2001                                                            &RMF_FILE_ENCCTX, rc,
2002                                                            RCL_SERVER);
2003                                 rc = 0;
2004                         } else {
2005                                 CDEBUG(D_SEC,
2006                                        "encryption ctx not found for "DFID": rc = %d\n",
2007                                        PFID(mdt_object_fid(child)), rc);
2008                                 req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0,
2009                                                    RCL_SERVER);
2010                                 /* handling -ENOENT is important because it may
2011                                  * change object state in DNE env dropping
2012                                  * LOHA_EXISTS flag, it is important to return
2013                                  * that to the caller.
2014                                  * Check LU-13115 for details.
2015                                  */
2016                                 if (rc != -ENOENT)
2017                                         rc = 0;
2018                         }
2019                 } else {
2020                         req_capsule_shrink(pill, &RMF_FILE_ENCCTX, 0,
2021                                            RCL_SERVER);
2022                 }
2023         }
2024         return rc;
2025 }